1. A hydraulic system of a construction equipment, characterized in that the hydraulic system comprises: a hydraulic pump (1301), a hydraulic motor (1302), and a lubrication pump (1303); the hydraulic pump (1301) is suitable for providing pressure liquid for the hydraulic motor (1302), the hydraulic motor (1302) is suitable for providing driving force for the lubricating pump (1303), and the lubricating pump (1303) is suitable for providing lubricating medium for devices which need to be lubricated and are included in the engineering equipment.

2. The hydraulic system of a working device according to claim 1, characterized in that the hydraulic pump (1301) is adapted for being in power connection with a power plant (200) comprised by the working device.

3. The hydraulic system of construction equipment according to claim 1, further comprising: a hydraulic starting motor (1304), the hydraulic pump (1301) being adapted to provide pressure fluid to the hydraulic starting motor (1304), the hydraulic starting motor (1304) being adapted to provide starting driving force to an engine comprised by the work apparatus.

4. The hydraulic system of construction equipment according to claim 3, further comprising: a diverter valve (140); the hydraulic starting motor (1304) comprises a first sub hydraulic starting motor (13041) and a second sub hydraulic starting motor (13042); the directional valve (140) has a first operating state, a second operating state, and a third operating state; when the reversing valve (140) is in the second working state, the hydraulic pump (1301) provides pressure liquid to the hydraulic motor (1302) through the reversing valve (140); when the reversing valve (140) is in the first working state, the hydraulic pump (1301) provides pressure liquid to the first sub-hydraulic starting motor (13041) through the reversing valve (140); when the reversing valve (140) is in the third working state, the hydraulic pump (1301) provides pressure liquid to the second sub hydraulic starting motor (13042) through the reversing valve (140).

5. The hydraulic system of engineering equipment according to claim 4, wherein the reversing valve (140) has an oil inlet (1401) and an oil return port (1402), the oil inlet (1401) is connected with an outlet of the hydraulic pump (1301), the oil return port (1402) is connected with an inlet of the hydraulic motor (1302), and when the reversing valve (140) is in the second working state, the oil inlet (1401) is connected with the oil return port (1402).

6. The hydraulic system of an engineering plant according to claim 5, further comprising a constant pressure differential valve provided at the oil inlet (1401).

7. The hydraulic system of engineering equipment according to claim 5, wherein the reversing valve (140) is provided with a first working oil port (1403) and a second working oil port (1404), the first working oil port (1403) is connected with the oil inlets (1401) of the first sub hydraulic starting motors (13041), and the second working oil port (1404) is connected with the oil inlets (1401) of the second sub hydraulic starting motors (13042).

8. The hydraulic system of construction equipment according to claim 1, further comprising: the hydraulic control system comprises an oil tank (110), a first overflow valve (1501) and a second overflow valve (1502), wherein the inlet of the first overflow valve (1501) is connected with the outlet of the hydraulic pump (1301), the inlet of the second overflow valve (1502) is respectively connected with the outlet of the first overflow valve (1501) and the inlet of the hydraulic motor (1302), and the outlet of the second overflow valve (1502) is connected with the oil tank (110).

9. An engineering apparatus, characterized in that the engineering apparatus comprises: device to be lubricated and hydraulic system of an engineering plant according to any one of claims 1 to 8, the device to be lubricated comprising a lubricating oil injection opening, the lubricating pump (1303) comprising a lubricating liquid outlet, the lubricating liquid outlet being connected to the lubricating oil injection opening.

10. The engineering equipment according to claim 9, characterized in that the engineering equipment further comprises a chassis, the device to be lubricated and the hydraulic system are respectively arranged on the chassis, the chassis comprises a walking engine, and the walking engine is in power connection with the hydraulic pump (1301).

11. The engineering equipment of claim 10, wherein the engineering equipment is a fracturing truck, the device to be lubricated comprises a fracturing engine, and the engineering equipment further comprises a fracturing pump, and the fracturing engine is in power connection with the fracturing pump.

12. A use method of engineering equipment, which is applied to the engineering equipment as claimed in any one of claims 9 to 11, and is characterized in that the use method comprises the following steps:

starting the hydraulic pump (1301), providing pressure liquid to the hydraulic motor (1302) by using the hydraulic pump (1301), and enabling the hydraulic motor (1302) to output driving force under the action of the pressure liquid;

providing a driving force to the lubrication pump (1303) with the hydraulic motor (1302), such that the lubrication pump (1303) pressurizes the lubrication medium;

-feeding the pressurized lubricating medium to the device to be lubricated by means of the lubricating pump (1303).

Background

In engineering plants, it is often necessary to supply lubricating medium to some devices to be lubricated. In the related art, a storage battery of the engineering equipment is generally used for supplying electric energy to the motor, so that the motor drives the lubricating pump to work, and the lubricating pump supplies a lubricating medium to a device needing to be lubricated. The power of the motor for driving the lubricating pump to work is large, so that the storage battery is easy to be lack of power, and the storage battery is easy to be damaged due to lack of power.

Disclosure of Invention

The embodiment of the application provides a hydraulic system of engineering equipment, the engineering equipment and a using method, and aims to solve the problem that a storage battery of the engineering equipment is easy to damage due to power shortage.

In a first aspect, an embodiment of the present application provides a hydraulic system of engineering equipment.

The hydraulic system that this application embodiment provided includes: hydraulic pumps, hydraulic motors and lubrication pumps; the hydraulic pump is suitable for providing pressure liquid for the hydraulic motor, the hydraulic motor is suitable for providing driving force for the lubricating pump, and the lubricating pump is suitable for providing lubricating medium for devices needing to be lubricated and included in the engineering equipment.

Optionally, the hydraulic pump is adapted for power connection with a power plant comprised by the engineering equipment.

Optionally, the hydraulic system further comprises: a hydraulic starting motor adapted to provide pressure fluid to the hydraulic starting motor, the hydraulic starting motor being adapted to provide starting driving force to an engine comprised by the construction equipment.

Optionally, the hydraulic system further comprises: a diverter valve; the hydraulic starting motor comprises a first sub hydraulic starting motor and a second sub hydraulic starting motor; the reversing valve has a first working state, a second working state and a third working state; when the reversing valve is in the second working state, the hydraulic pump provides pressure liquid for the hydraulic motor through the reversing valve; when the reversing valve is in the first working state, the hydraulic pump provides pressure liquid for the first sub-hydraulic starting motor through the reversing valve; and when the reversing valve is in the third working state, the hydraulic pump provides pressure liquid for the second sub-hydraulic starting motor through the reversing valve.

Optionally, the reversing valve has an oil inlet and an oil return port, the oil inlet is connected to an outlet of the hydraulic pump, the oil return port is connected to an inlet of the hydraulic motor, and when the reversing valve is in the second operating state, the oil inlet is connected to the oil return port.

Optionally, the hydraulic system further comprises a constant pressure differential valve, and the constant pressure differential valve is arranged at the oil inlet.

Optionally, the reversing valve has a first working oil port and a second working oil port, the first working oil port is connected to the oil inlet of the first sub hydraulic starting motor, and the second working oil port is connected to the oil inlet of the second sub hydraulic starting motor.

Optionally, the hydraulic system further comprises: the hydraulic pump comprises an oil tank, a first overflow valve and a second overflow valve, wherein the inlet of the first overflow valve is connected with the outlet of the hydraulic pump, the inlet of the second overflow valve is respectively connected with the outlet of the first overflow valve and the inlet of the hydraulic motor, and the outlet of the second overflow valve is connected with the oil tank.

In a second aspect, an embodiment of the present application provides an engineering device.

The engineering equipment that this application embodiment provided includes: the device to be lubricated comprises a lubricating oil injection port, the lubricating pump comprises a lubricating liquid outlet, and the lubricating liquid outlet is connected with the lubricating oil injection port.

Optionally, the engineering equipment further comprises a chassis truck, the device to be lubricated and the hydraulic system are respectively arranged on the chassis truck, the chassis truck comprises a walking engine, and the walking engine is in power connection with the hydraulic pump.

Optionally, the engineering equipment is a fracturing truck, the device needing to be lubricated comprises an engine for fracturing, the engineering equipment further comprises a fracturing pump, and the engine for fracturing is in power connection with the fracturing pump.

In a third aspect, an embodiment of the present application provides a method for using engineering equipment.

The application method of the engineering equipment provided by the embodiment of the application is applied to any engineering equipment provided by the second aspect, and the application method of the engineering equipment provided by the embodiment of the application comprises the following steps: starting the hydraulic pump, and providing pressure liquid to the hydraulic motor by using the hydraulic pump, so that the hydraulic motor outputs driving force under the action of the pressure liquid; providing a driving force to the lubrication pump with the hydraulic motor such that the lubrication pump pressurizes the lubrication medium; and conveying the pressurized lubricating medium to the device to be lubricated by using the lubricating pump.

The embodiment of the application adopts at least one technical scheme which can achieve the following beneficial effects:

in the embodiment of the application, the hydraulic motor can output the driving force by the way that the hydraulic pump provides the pressure fluid to the hydraulic motor, the hydraulic motor can be used for providing the driving force to the lubricating pump, the lubricating pump can be used for pressurizing the lubricating medium, and the lubricating pump can be used for providing the lubricating medium to the device to be lubricated, so that the device to be lubricated is lubricated. Thus, compared with the method of directly driving the lubricating pump by the motor, the problem that the storage battery is easily damaged due to power shortage can be improved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments or related technologies of the present application, the drawings needed to be used in the description of the embodiments or related technologies are briefly introduced below, it is obvious that the drawings in the following description are only some embodiments described in the present application, and for those skilled in the art, other drawings can be obtained according to these drawings without any creative effort.

Fig. 1 is a schematic diagram of a hydraulic system of a piece of engineering equipment according to an embodiment of the present disclosure;

fig. 2 is a flowchart of a method for using engineering equipment according to an embodiment of the present application.

Description of reference numerals: 100-a hydraulic system; 110-a fuel tank; 120-a filter; 1301-a hydraulic pump; 1302-a hydraulic motor; 1303-lubrication pump; 1304-hydraulic starter motor; 13041-first sub-hydraulic starter motor; 13042-a second sub-hydraulic starter motor; 140-a reversing valve; 1401-an oil inlet; 1402-oil return port; 1403-a first working oil port; 1404-a second working oil port; 1405-overflow port; 1501-a first relief valve; 1502-a second relief valve; 160-pressure gauge; 200-a power plant; 300-devices requiring lubrication.

Detailed Description

In order to make those skilled in the art better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The technical solutions provided by the embodiments of the present application are described in detail below with reference to the accompanying drawings.

The embodiment of the application provides a hydraulic system of engineering equipment. Referring to fig. 1, a hydraulic system 100 provided by an embodiment of the present application may include: a hydraulic pump 1301, a hydraulic motor 1302, and a lubrication pump 1303. The hydraulic pump 1301 may be used to provide pressure fluid to the hydraulic motor 1302, the hydraulic motor 1302 may be used to provide driving force to the lubrication pump 1303, and the lubrication pump 1303 may be used to provide a lubrication medium to the device 300 that needs to be lubricated and included in the engineering equipment.

In this way, in the embodiment of the present application, the hydraulic motor 1302 may be enabled to output the driving force by supplying the hydraulic fluid from the hydraulic pump 1301 to the hydraulic motor 1302, the hydraulic motor 1302 may be used to supply the driving force to the lubrication pump 1303, the lubrication pump 1303 may be used to pressurize the lubrication medium, and the lubrication pump 1303 may be used to supply the lubrication medium to the device 300 to be lubricated, so as to lubricate the device 300 to be lubricated. Thus, the problem that the battery is easily damaged by a power shortage can be improved as compared with the case where the lubricating pump 1303 is directly driven by the motor.

For example, in the embodiment of the present application, a hydraulic pump element of the engineering equipment itself may be used as the hydraulic pump 1301 of the hydraulic system, so that the direct use of the motor to drive the lubrication pump 1303 to operate may be avoided. For example, in the embodiment of the present application, the hydraulic pump 1301 can also be driven to work by a traveling engine of the engineering equipment, so that the hydraulic pump 1301 can supply pressure fluid to the hydraulic motor 1302. Other implementations are not necessarily recited herein.

Alternatively, in an embodiment of the present application, the hydraulic pump 1301 may be used to power connect with the power plant 200 included in the construction equipment. In this way, the power unit 200 included in the construction equipment may be used to provide driving force to the hydraulic pump 1301. For example, the power device 200 may be a walking engine, wherein the walking engine is an engine that may be used to power a walking structure of the engineering equipment.

Optionally, in an embodiment of the present application, the hydraulic system 100 may further include: the motor 1304 is hydraulically activated. The hydraulic pump 1301 may be used to provide pressure fluid to a hydraulic starter motor 1304, and the hydraulic starter motor 1304 may be used to provide starting drive power to an engine included in the work machine. Thus, in the embodiment of the present application, the hydraulic starter motor 1304 can be used to provide the engine with the starting driving force, and the conventional starter motor for starting the engine can be omitted. In this way, the application range of the hydraulic system 100 provided by the embodiment of the present application can be expanded.

Optionally, in an embodiment of the present application, the hydraulic system 100 may further include: a diverter valve 140. The hydraulic starter motor 1304 may include a first sub-hydraulic starter motor 13041 and a second sub-hydraulic starter motor 13042. The directional valve 140 may have a first operating state, a second operating state, and a third operating state. When the directional valve 140 is in the second operating state, the hydraulic pump 1301 can provide pressure fluid to the hydraulic motor 1302 via the directional valve 140. When the directional valve 140 is in the first operating state, the hydraulic pump 1301 can supply pressure fluid to the first sub hydraulic starter motor 13041 via the directional valve 140. When the directional valve 140 is in the third operating state, the hydraulic pump 1301 can supply pressure fluid to the second sub hydraulic starter motor 13042 via the directional valve 140.

Thus, when the direction valve 140 is in the second operation state, the pressure fluid pressurized by the hydraulic pump 1301 may be supplied to the hydraulic motor 1302, and the lubrication pump 1303 may be driven to operate by the hydraulic motor 1302. When the direction switching valve 140 is in the first operation state or the third operation state, the pressure fluid pressurized by the hydraulic pump 1301 may be delivered to the first sub hydraulic starter motor 13041 or the second sub hydraulic starter motor 13042, and the starting driving force may be provided to the engine by using the first sub hydraulic starter motor 13041 or the second sub hydraulic starter motor 13042.

It should be noted that, for example, the device 300 to be lubricated may be an engine, for example, when the engineering equipment is a fracturing pump truck, the device 300 to be lubricated may be a fracturing engine; the reversing valve 140 can be in the second working state, the fracturing engine is pre-lubricated firstly, after the pre-lubrication is finished, the reversing valve 140 can be in the first working state, and the first sub hydraulic starting motor 13041 can be used for providing starting driving force for the fracturing engine. Therefore, the engine can be started after the pre-lubrication is finished, and the service life of the engine can be prolonged. In addition, the first sub hydraulic starter motor 13041 or the second sub hydraulic starter motor 13042 may be a backup for each other, and when one of them fails, the other can be started.

Optionally, in embodiments of the present application, the reversing valve 140 may have an oil inlet 1401 and an oil return 1402. It should be noted that, in the hydraulic field, the oil inlet 1401 may be generally called a P port, and the oil return port is a T port. The oil inlet 1401 may be connected to an outlet of the hydraulic pump 1301, the oil return 1402 may be connected to an inlet of the hydraulic motor 1302, and the oil inlet 1401 and the oil return 1402 are connected when the directional control valve 140 is in the second operating state. Thus, when the direction valve 140 is in the second operation state, the pressure fluid generated by the hydraulic pump 1301 can enter the hydraulic motor 1302 through the oil inlet 1401 and the oil return 1402, so that the hydraulic motor 1302 can be driven to operate.

Optionally, in an embodiment of the present application, the hydraulic system 100 may further include a constant pressure differential valve, which may be disposed at the oil inlet 1401. In this way, the pressure stability of the pressure liquid in the oil passage can be improved.

Alternatively, in an embodiment of the present application, the selector valve 140 may have a first working oil port 1403 and a second working oil port 1404. In the hydraulic field, the first working oil port 1403 is referred to as an a port, and the second working oil port is referred to as a B port. The first working oil port 1403 may be connected with an oil inlet 1401 of the first sub hydraulic starting motor 13041, and the second working oil port 1404 may be connected with an oil inlet 1401 of the second sub hydraulic starting motor 13042.

Optionally, in an embodiment of the present application, the hydraulic system 100 may further include: the hydraulic pump includes an oil tank 110, a first relief valve 1501 and a second relief valve 1502, an inlet of the first relief valve 1501 is connected to an outlet of the hydraulic pump 1301, an inlet of the second relief valve 1502 is connected to an outlet of the first relief valve 1501 and an inlet of the hydraulic motor 1302, respectively, and an outlet of the second relief valve 1502 is connected to the oil tank 110. For example, the spill action pressure of first spill valve 1501 may be greater than the spill action pressure of second spill valve 1502. In this way, the outlet pressure of the hydraulic pump 1301 can be restricted by the first relief valve 1501, and the inlet pressure of the hydraulic motor 1302 can be restricted by the second relief valve 1502.

Optionally, in embodiments of the present application, the diverter valve 140 may also have an overflow 1405. In the hydraulic field, the overflow port 1405 of the selector valve 140 may be referred to as a "Y" port. The overflow 1405 of the directional valve 140 may be connected to the tank 110 such that the pressurized fluid overflowing the directional valve 140 may flow back into the tank 110.

Optionally, in an embodiment of the present application, the hydraulic system 100 may further include: the filter 120, the filter 120 may be disposed between the oil tank 110 and the hydraulic pump 1301, so that the liquid entering the hydraulic pump 1301 may be filtered by the filter 120.

It should be noted that, for example, in the embodiment of the present application, the liquid in the oil tank 110 may be hydraulic oil. Of course, as technology advances, other new hydraulic mediums may be present, and in the embodiment of the present application, the liquid in the tank 110 may be other hydraulic mediums.

Optionally, in an embodiment of the present application, the hydraulic system 100 may further include: the pressure gauge 160, the pressure gauge 160 may be disposed at an inlet of the first relief valve 1501, and a pressure value of the liquid at the inlet of the first relief valve 1501 may be measured by the pressure gauge 160.

Furthermore, optionally, in the embodiment of the present application, pressure measurement points may be disposed on oil return pipelines of the hydraulic motor 1302 and the hydraulic starting motor 1304, and pressure measurement points may also be disposed on an oil inlet pipeline and an oil return pipeline of the hydraulic starting motor 1304, respectively.

In this way, in the embodiment of the present application, the hydraulic motor 1302 may be enabled to output the driving force by supplying the hydraulic fluid from the hydraulic pump 1301 to the hydraulic motor 1302, the hydraulic motor 1302 may be used to supply the driving force to the lubrication pump 1303, the lubrication pump 1303 may be used to pressurize the lubrication medium, and the lubrication pump 1303 may be used to supply the lubrication medium to the device 300 to be lubricated, so as to lubricate the device 300 to be lubricated. Thus, the problem that the battery is easily damaged by a power shortage can be improved as compared with the case where the lubricating pump 1303 is directly driven by the motor.

The embodiment of the application provides engineering equipment. The engineering equipment provided by the embodiment of the application can comprise: the device 300 to be lubricated and any one of the hydraulic systems 100 provided in the embodiments of the present application, the device 300 to be lubricated may include a lubricating oil inlet, and the lubricating pump 1303 may include a lubricating oil outlet, which may be connected to the lubricating oil inlet.

Optionally, in an embodiment of the present application, the engineering equipment may further include a chassis, and the device 300 to be lubricated and the hydraulic system 100 may be respectively disposed on the chassis, and the chassis may include a walking engine, and the walking engine may be in power connection with the hydraulic pump 1301. Thus, the traveling engine can be used to drive the hydraulic pump 1301.

Optionally, in an embodiment of the present application, the engineering equipment may be a fracturing truck, the device 300 to be lubricated may include a fracturing motor, and the engineering equipment may further include a fracturing pump, and the fracturing motor may be in power connection with the fracturing pump. Thus, the hydraulic system 100 can be used for lubricating the fracturing engine, and the fracturing engine can be used for driving the fracturing pump to work after the fracturing engine is normally started.

Optionally, in the embodiment of the present application, when the device 300 to be lubricated is an engine, the engineering equipment may further include an engine oil pan, the lubricating medium may be disposed in the engine oil pan, the lubricating medium may be drawn from the engine oil pan by using the lubricating pump 1303, and the drawn lubricating medium may be pressurized.

Optionally, in an embodiment of the present application, the engineering equipment may further include a pressure switch, and the pressure switch may be disposed on a lubricating medium pipeline of the device 300 to be lubricated, so that when the lubrication is not completed, the pressure switch may be in a first state, for example, the pressure switch may be in a conducting state, and a pressure indicator lamp controlled by a pressure switch may be in a lighting state, so as to remind an operator that the lubrication is not completed and remind the operator not to hastily start the device 300 to be lubricated. When lubrication is completed, the pressure switch may be in a second state, for example, the pressure switch may be in an off state, which may cause the pressure indicator lamp controlled by the pressure switch to be in an off state.

Optionally, in an embodiment of the present application, the engineering device may further include a relay, and the relay may be used in cooperation with the pressure switch, for example, when the pressure switch is in the first state, the relay may be used to lock the opening function of the device 300 to be lubricated, so that the false start may be avoided. When the pressure switch is in the second state, the relay may unlock the on function of the device 300 to be lubricated.

In this way, in the embodiment of the present application, the hydraulic motor 1302 may be enabled to output the driving force by supplying the hydraulic fluid from the hydraulic pump 1301 to the hydraulic motor 1302, the hydraulic motor 1302 may be used to supply the driving force to the lubrication pump 1303, the lubrication pump 1303 may be used to pressurize the lubrication medium, and the lubrication pump 1303 may be used to supply the lubrication medium to the device 300 to be lubricated, so as to lubricate the device 300 to be lubricated. Thus, the problem that the battery is easily damaged by a power shortage can be improved as compared with the case where the lubricating pump 1303 is directly driven by the motor.

The embodiment of the application provides a using method of engineering equipment. The application method of the engineering equipment provided by the embodiment of the application can be applied to any engineering equipment provided by the embodiment of the application. The application method provided by the embodiment of the application can comprise the following steps: step 401, starting a hydraulic pump 1301, supplying pressure liquid to a hydraulic motor 1302 by using the hydraulic pump 1301, and enabling the hydraulic motor 1302 to output driving force under the action of the pressure liquid; step 402, providing a driving force to a lubricating pump 1303 by using a hydraulic motor 1302, so that the lubricating pump 1303 pressurizes a lubricating medium; in step 403, the pressurized lubrication medium is delivered to the device 300 to be lubricated by the lubrication pump 1303.

In addition, taking the example that the engineering equipment may be a fracturing truck, and the device 300 to be lubricated may include a fracturing engine, the application method provided by the embodiment of the present application may include:

before the power plant 200 is started, the connecting line of the first working oil port 1403 of the reversing valve 140 is removed, and then the first working oil port 1403 is blocked by a plug (or other reducer union) with the same specification. Starting the power plant 200, wherein the power plant 200 may be a walking engine, for example, may bring the power plant 200 to the target rotational speed. Then, a toggle switch for starting the fracturing engine may be turned on, the measured pressure value of the pressure gauge 160 may be obtained, and the adjusting bolt of the first relief valve 1501 may be adjusted so that the relief operation pressure of the first relief valve 1501 is a target value. The adjusting bolt of the first overflow valve 1501 can be locked, and the detached pipeline is restored after the power device 200 stops running.

The power unit 200 is started, so that the power unit 200 reaches the target rotation speed, the reversing valve 140 is in the second working state, the relief action pressure of the second relief valve 1502 is adjusted, the pressure of the lubricating medium is obtained, and the second relief valve 1502 is locked until the pressure of the lubricating medium reaches the target value.

In the lubrication process, pressure switch can be in the on-state, and pressure indicator can be in the state of lighting, and the relay can be used for locking the opening function of the device 300 that need lubricate, can make the engine for fracturing be in the state that can not start through the relay. When the lubrication pressure reaches the target pressure value, the pressure switch may be in an off state, and the relay may unlock the open function of the device 300 to be lubricated. The starting switch of the fracturing engine can be pulled to start the fracturing engine.

In this way, in the embodiment of the present application, the hydraulic motor 1302 may be enabled to output the driving force by supplying the hydraulic fluid from the hydraulic pump 1301 to the hydraulic motor 1302, the hydraulic motor 1302 may be used to supply the driving force to the lubrication pump 1303, the lubrication pump 1303 may be used to pressurize the lubrication medium, and the lubrication pump 1303 may be used to supply the lubrication medium to the device 300 to be lubricated, so as to lubricate the device 300 to be lubricated. Thus, the problem that the battery is easily damaged by a power shortage can be improved as compared with the case where the lubricating pump 1303 is directly driven by the motor.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present application have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the embodiments of the application, the scope of which is defined in the appended claims and their equivalents.