1. A filter pulsation filtering precision testing device is characterized by comprising a testing oil tank, wherein a liquid outlet at the bottom of the testing oil tank is sequentially connected with a first testing pump, a first three-way valve, a tested piece, a first regulating valve, a first flowmeter, a first radiator and a liquid inlet at the top of the testing oil tank through pipelines, a third interface of the first three-way valve is sequentially connected with the first filter, the first one-way valve and the liquid inlet of the tested piece through pipelines, a first pressure sensor is connected on the pipeline between the first testing pump and the tested piece, a first liquid inlet particle counter is connected on the pipeline between the first testing pump and the tested piece through a pipeline and a two-position four-way valve, a liquid outlet particle counter is connected on the pipeline between the tested piece and the first regulating valve through a pipeline and a two-position four-way valve, and a liquid outlet particle counter is connected on the upper portion of the testing oil tank through a pipeline, the pipeline on two sides of the tested piece is connected with a first pressure difference sensor connected with the tested piece in parallel, the pipeline between the first pressure sensor and the first three-way valve is sequentially connected with a first coaxial valve and a second regulating valve through pipelines, and the liquid outlet of the second regulating valve is connected with the pipeline between the first flowmeter and the first radiator through pipelines.

2. The filter pulsation filtering accuracy testing apparatus according to claim 1, wherein: the liquid outlet at the bottom of the test oil tank is sequentially connected with a second test pump, a second radiator, a second three-way valve, a second filter, a second flow meter, a third regulating valve and a top liquid inlet of the test oil tank through pipelines, a third interface of the second three-way valve is sequentially connected with a third filter, a third flow meter, a first back pressure valve and a top liquid inlet of the test oil tank through pipelines, and a fourth regulating valve and a top liquid inlet of the test oil tank are connected on the pipelines between the second three-way valve and the second radiator through pipelines.

3. The filter pulsation filtering accuracy testing apparatus according to claim 1, wherein: a third interface of the two-position four-way valve II is sequentially connected with a first pressure reducing valve, a first metering pump, a second check valve, a second metering pump, a first overflow valve and a top liquid inlet of the dilution oil tank through pipelines, a second pressure sensor is connected on a pipeline between the first metering pump and the second check valve, a third pressure sensor is connected on a pipeline between the second metering pump and the first overflow valve, a fourth filter and a first circulating pump are sequentially connected on a pipeline between the second metering pump and the first overflow valve through pipelines, a liquid outlet of the first circulating pump is connected with a liquid outlet at the bottom of the dilution oil tank through a pipeline, a fourth interface of the two-position four-way valve II is connected with the top liquid inlet of the dilution oil tank through a pipeline and a second back pressure valve, and a pipeline between the second two-position four-way valve and the second back pressure valve is connected with a pipeline between the first metering pump and the second check valve through a first flow mixer; the third interface of the two-position four-way valve I is sequentially connected with a second pressure reducing valve, a third metering pump, a third check valve, a fourth metering pump and a first overflow valve liquid inlet through pipelines, the fourth interface of the two-position four-way valve I is connected with a liquid inlet at the top of the dilution oil tank through a pipeline and a third back pressure valve, the pipeline between the two-position four-way valve II and the third back pressure valve is connected with the pipeline between the second metering pump and the third check valve through a second mixed valve, a fourth pressure sensor is connected on the pipeline between the second pressure reducing valve II and the third metering pump, and a fifth pressure sensor is connected on the pipeline between the third back pressure valve II and the second mixed valve.

4. The filter pulsation filtering accuracy testing apparatus according to claim 1, wherein: the test piece is characterized in that a liquid collecting tank is arranged at the bottom of the test piece, a liquid outlet at the bottom of the liquid collecting tank is sequentially connected with a second circulating pump, a fourth check valve and a top liquid inlet of the oil storage tank through a pipeline, a first liquid outlet at the bottom of the oil storage tank is sequentially connected with a first gear pump through a pipeline, a fifth filter, a third radiator, a fourth flowmeter and a top liquid inlet of the oil storage tank, a sixth pressure sensor is connected to the pipeline between the first gear pump and the fifth filter, the pipeline between the oil storage tank and the first gear pump is connected with a first interface of a three-position four-way reversing valve through a pipeline, a second interface of the three-position four-way reversing valve is connected with a first test pump and a test oil tank through a pipeline, and a first peristaltic pump is connected with a top liquid inlet of the test oil tank through a pipeline.

5. The filter pulsation filtering accuracy testing apparatus according to claim 1, wherein: one side of experimental oil tank is equipped with dirty oiling case, this dirty oiling case bottom liquid outlet pass through the pipeline in proper order with circulating pump three, the radiator four, three-way valve three is connected with dirty oiling case top inlet, three third interfaces of this three-way valve pass through the pipeline in proper order with filter six, check valve five is connected with dirty oiling case upper portion inlet, the pipeline between three and the dirty oiling case of circulating pump passes through pipeline and tribit four-way reversing valve third interface connection, dirty oiling case top inlet pass through the pipeline in proper order with peristaltic pump two, three-way valve four is connected with experimental oil case top inlet, four third interfaces of this three-way valve pass through the pipeline and are connected with dirty oiling case top inlet.

6. The filter pulsation filtering accuracy testing apparatus according to claim 1, wherein: dirty notes oil tank and the inside agitating unit that all is equipped with of experimental oil tank all are equipped with the heating band on the lateral wall of dirty notes oil tank and experimental oil tank, all are equipped with temperature sensor and level sensor on the lateral wall of dirty water injection tank and experimental oil tank.

Background

The existing filter element filtering performance test is only limited to a laboratory state, and a plurality of uncertain factors exist in the practical application process, so that the test result has larger deviation from the practical application, and in order to be closer to the practical application working condition, the pulse condition needs to be added in the test system. For example, in the automobile filter, the working states of the filter are different in the automobile starting and accelerating and decelerating processes, the original test method is similar to that of testing the automobile in a constant speed state, and in fact, the automobile starting, accelerating, decelerating and other states are different, in order to simulate the state, the test result of the filter element is closer to the actual application working condition, and pulses are necessary to be added into a test system, so that the test result has a reference value for the actual application working condition result, but no related research report in the aspect exists at present. Therefore, it is necessary to design a filter pulsation filtering accuracy testing apparatus capable of effectively ensuring the testing accuracy.

Disclosure of Invention

The invention solves the technical problem of providing a filter pulsation filtering precision testing device which can effectively ensure the testing precision.

The invention adopts the following technical scheme to solve the technical problems, and the filter pulsation filtering precision testing device is characterized by comprising a test oil tank, wherein a liquid outlet at the bottom of the test oil tank is sequentially connected with a first test pump, a first three-way valve, a tested piece, a first regulating valve, a first flow meter, a first radiator and a liquid inlet at the top of the test oil tank through pipelines, a third interface of the first three-way valve is sequentially connected with the first filter, the first check valve and the liquid inlet of the tested piece through pipelines, a first pressure sensor is connected on the pipeline between the first test pump and the tested piece, a liquid inlet particle counter is connected on the pipeline between the first test pump and the tested piece through a pipeline and a two-position four-way valve, a liquid outlet particle counter is connected on the pipeline between the tested piece and the first regulating valve through a pipeline and a two-position four-way valve, the liquid discharge end of the liquid particle counter is connected with a liquid inlet in the upper portion of the test oil tank through a pipeline, a first pressure difference sensor connected with the tested piece in parallel is connected to pipelines on two sides of the tested piece, a first coaxial valve and a second regulating valve are connected to the pipeline between the first pressure sensor and the first three-way valve in sequence through pipelines, and a liquid outlet of the second regulating valve is connected with the pipeline between the first flowmeter and the first radiator through a pipeline.

Further inject, the liquid outlet of experimental oil tank bottom is connected with experimental pump two, radiator two, three-way valve two, filter two, flowmeter two, governing valve three and experimental oil tank top inlet in proper order through the pipeline, and three-way valve two third interface is connected with filter three, flowmeter three, back pressure valve one and experimental oil tank top inlet in proper order through the pipeline, and pipeline and governing valve four between two-way valve and the radiator are connected with experimental oil tank top inlet on.

The third interface of the two-position four-way valve II is sequentially connected with a first pressure reducing valve, a first metering pump, a second check valve, a second metering pump, a first overflow valve and a liquid inlet at the top of the dilution oil tank through pipelines, a second pressure sensor is connected on a pipeline between the first metering pump and the second check valve, a third pressure sensor is connected on a pipeline between the second metering pump and the first overflow valve, a fourth filter and a first circulating pump are sequentially connected on a pipeline between the second metering pump and the first overflow valve through pipelines, a liquid outlet at the bottom of the dilution oil tank is connected with a liquid outlet at the bottom of the dilution oil tank through a pipeline, a fourth interface of the two-position four-way valve II is connected with the liquid inlet at the top of the dilution oil tank through a pipeline and a second back pressure valve, and a pipeline between the second two-position four-way valve and the second back pressure valve is connected with a pipeline between the first metering pump and the second check valve through a first flow mixer; the third interface of the two-position four-way valve I is sequentially connected with a second pressure reducing valve, a third metering pump, a third check valve, a fourth metering pump and a first overflow valve liquid inlet through pipelines, the fourth interface of the two-position four-way valve I is connected with a liquid inlet at the top of the dilution oil tank through a pipeline and a third back pressure valve, the pipeline between the two-position four-way valve II and the third back pressure valve is connected with the pipeline between the second metering pump and the third check valve through a second mixed valve, a fourth pressure sensor is connected on the pipeline between the second pressure reducing valve II and the third metering pump, and a fifth pressure sensor is connected on the pipeline between the third back pressure valve II and the second mixed valve.

Further inject, be equipped with the collecting tank by the test piece bottom, this collecting tank bottom liquid outlet pass through the pipeline in proper order with circulating pump two, check valve four is connected with batch oil tank top inlet, batch oil tank bottom liquid outlet pass through the pipeline in proper order with gear pump one, filter five, radiator three, flowmeter four is connected with batch oil tank top inlet, be connected with pressure sensor six on the pipeline between gear pump one and the filter five, pipeline between batch oil tank and the gear pump one passes through pipeline and the first interface connection of two-way pump and tribit four-way reversing valve, pipeline connection between tribit four-way reversing valve second interface pass through pipeline and test pump one and the test oil tank, batch oil tank top inlet passes through pipeline and peristaltic pump one and is connected with test oil tank top inlet.

Further inject, one side of experimental oil tank is equipped with dirty oiling case, this dirty oiling case bottom liquid outlet pass through the pipeline in proper order with circulating pump three, radiator four, three-way valve three is connected with dirty oiling case top inlet, this three-way valve third interface pass through the pipeline in proper order with filter six, check valve five is connected with dirty oiling case upper portion inlet, pipeline between circulating pump three and the dirty oiling case passes through pipeline and three-position four-way reversing valve third interface connection, dirty oiling case top inlet pass through the pipeline in proper order with peristaltic pump two, three-way valve four is connected with experimental oil case top inlet, this four-way valve third interface pass through the pipeline and are connected with dirty oiling case top inlet.

Further inject, dirty notes oil tank and the inside agitating unit that all is equipped with of experimental oil tank all are equipped with the heating band on the lateral wall of dirty notes oil tank and experimental oil tank, all are equipped with temperature sensor and level sensor on the lateral wall of dirty water injection tank and experimental oil tank.

Compared with the prior art, the invention has the following advantages and beneficial effects: the system for testing the filtering precision of the filter under the pulsating flow is a multifunctional and integrated testing device which integrates the flow pressure drop characteristic of the filter, the anti-cracking characteristic of the filter, the opening characteristic of a bypass valve, the multi-pass testing characteristic under the pulsating flow and the like on the basis of the multi-pass testing characteristic pair. In addition, the invention can complete the pulse test, can realize the general filtering performance test through the functional valve and the setting of the related program, and can complete the single-pass test through the related program setting, namely, one device can complete three performance tests.

Drawings

Fig. 1 is a schematic structural view of the present invention.

In the figure: 1-a liquid particle counter, 2-a two-position four-way valve two, 3-a mixer one, 4-a pressure reducing valve one, 5-a metering pump one, 6-a pressure sensor two, 7-a one-way valve two, 8-a radiator one, 9-a flowmeter one, 10-a regulating valve one, 11-a pressure regulating valve two, 12-a peristaltic pump one, 13-a flowmeter two, 14-a regulating valve three, 15-a tested piece, 16-a flowmeter three, 17-a back pressure valve one, 18-a coaxial valve one, 19-a three-way valve two, 20-a regulating valve four, 21-a pressure sensor one, 22-a pressure difference sensor one, 23-a test pump two, 24-a test oil tank, 25-a three-way valve four, 26-a peristaltic pump two, 27-a test pump one, 28-a sewage injection oil tank, 29-six filter, 30-three circulating pump, 31-four radiator, 32-one filter, 33-three-position four-way reversing valve, 34-two-way pump, 35-gear pump, 36-oil storage tank, 37-dilution oil tank, 38-one circulating pump, 39-four filter, 40-one overflow valve, 41-two metering pump and 42-two back pressure valve.

Detailed Description

Describing the technical scheme of the invention in detail with reference to the accompanying drawings, as shown in fig. 1, a filter pulsation filtering precision testing device comprises a testing oil tank 24, a liquid outlet at the bottom of the testing oil tank 24 is sequentially connected with a first testing pump 27, a first three-way valve, a tested piece 15, a first regulating valve 10, a first flowmeter 9, a first radiator 8 and a liquid inlet at the top of the testing oil tank 24 through pipelines, a third interface of the first three-way valve is sequentially connected with a first filter 32, a first one-way valve and a liquid inlet of the tested piece 15 through pipelines, a first pressure sensor 21 is connected on the pipeline between the first testing pump 27 and the tested piece 15, a liquid inlet particle counter is connected on the pipeline between the first testing pump 27 and the tested piece 15 through a pipeline and a two-position four-way valve, a liquid outlet particle counter 1 is connected on the pipeline between the tested piece 15 and the first regulating valve 10 through a pipeline and a two-position four-way valve 2, the liquid discharge end of the liquid particle counter 1 is connected with a liquid inlet at the upper part of a test oil tank 24 through a pipeline, pipelines at two sides of a tested piece 15 are connected with a first differential pressure sensor 22 which is connected with the tested piece 15 in parallel, a pipeline between the first pressure sensor 21 and a first three-way valve is sequentially connected with a coaxial valve 18 and a second regulating valve 11 through pipelines, and a liquid outlet of the second regulating valve 11 is connected with a pipeline between a first flowmeter 9 and a first radiator 8 through a pipeline.

A liquid outlet at the bottom of a test oil tank 24 is sequentially connected with a test pump II 23, a radiator II, a three-way valve II 19, a filter II, a flowmeter II 13, a regulating valve III 14 and a liquid inlet at the top of the test oil tank 24 through pipelines, a third interface of the three-way valve II 19 is sequentially connected with a filter III, a flowmeter III 16, a back pressure valve I17 and a liquid inlet at the top of the test oil tank 24 through pipelines, and a pipeline between the three-way valve II 19 and the radiator II is connected with a liquid inlet at the top of the test oil tank 24 through a pipeline and a regulating valve IV 20.

The third interface of the two-position four-way valve II 2 is connected with a pressure reducing valve I4, a metering pump I5, a check valve II 7, a metering pump II 41, an overflow valve I40 and a liquid inlet at the top of a dilution oil tank 37 in sequence through pipelines, a pipeline between the first metering pump 5 and the second check valve 7 is connected with a second pressure sensor 6, a pipeline between the second metering pump 41 and the first overflow valve 40 is connected with a third pressure sensor, a pipeline between the second metering pump 41 and the first overflow valve 40 is sequentially connected with a fourth filter 39 and a first circulating pump 38 through pipelines, a liquid outlet of the first circulating pump 38 is connected with a liquid outlet at the bottom of the diluent oil tank 37 through a pipeline, a fourth interface of a second two-position four-way valve 2 is connected with a liquid inlet at the top of the diluent oil tank 37 through a pipeline and a second back pressure valve 42, and a pipeline between the second two-position four-way valve 2 and the second back pressure valve 42 is connected with a pipeline between the first metering pump 5 and the second check valve 7 through a first flow mixer 3; the third interface of the two-position four-way valve I is sequentially connected with a second pressure reducing valve, a third metering pump, a third check valve, a fourth metering pump and a 40 liquid inlet of the overflow valve through pipelines, the fourth interface of the two-position four-way valve I is connected with a 37 top liquid inlet of the dilution oil tank through a pipeline and a third back pressure valve, a pipeline between the two-position four-way valve II 2 and the third back pressure valve is connected with a pipeline between the second metering pump and the third check valve through a second flow mixer, a fourth pressure sensor is connected on the pipeline between the second pressure reducing valve II and the third metering pump, and a fifth pressure sensor is connected on the pipeline between the third back pressure valve III and the second flow mixer.

A liquid collecting tank is arranged at the bottom of a tested piece 15, a liquid outlet at the bottom of the liquid collecting tank is sequentially connected with a second circulating pump, a fourth check valve and a liquid inlet at the top of an oil storage tank 36 through pipelines, a liquid outlet at the bottom of the oil storage tank 36 is sequentially connected with a first gear pump 35, a fifth filter, a third radiator, a fourth flowmeter and a liquid inlet at the top of the oil storage tank 36 through pipelines, a sixth pressure sensor is connected on the pipeline between the first gear pump 35 and the fifth filter, the pipeline between the oil storage tank 36 and the first gear pump 35 is connected with a first interface of a three-position four-way reversing valve 33 through a pipeline and a two-way pump 34, a second interface of the three-position four-way reversing valve 34 is connected with the pipeline between a first test pump 27 and a test oil tank 24 through a pipeline, and a liquid inlet at the top of the oil storage tank is connected with a liquid inlet at the top of the test oil tank 24 through a pipeline and a first peristaltic pump 12.

A sewage injection oil tank 28 is arranged on one side of a test oil tank 24, a liquid outlet at the bottom of the sewage injection oil tank 28 is sequentially connected with a third circulating pump 30, a fourth radiator 31, a third three-way valve and a liquid inlet at the top of the sewage injection oil tank 28 through pipelines, a third interface of the third three-way valve is sequentially connected with a sixth filter 29, a fifth one-way valve and a liquid inlet at the upper part of the sewage injection oil tank through pipelines, a pipeline between the third circulating pump 30 and the sewage injection oil tank 28 is connected with a third interface of a three-position four-way reversing valve 33 through a pipeline, a liquid inlet at the top of the sewage injection oil tank 28 is sequentially connected with a second peristaltic pump 26, a fourth three-way valve 25 and a liquid inlet at the top of the test oil tank 24 through pipelines, and a third interface of the fourth three-way valve 25 is connected with a liquid inlet at the top of the sewage injection oil tank 28 through a pipeline.

Stirring devices are arranged inside the sewage injection tank 28 and the test oil tank 24, heating belts are arranged on the side walls of the sewage injection tank 28 and the test oil tank 24, and temperature sensors and liquid level sensors are arranged on the side walls of the sewage injection tank 28 and the test oil tank 24.

The test principle of the invention is as follows: when passing through the experiment many times, during the test medium in the test oil tank is inputed to the pipeline by test pump package, through by the test piece, and through pressure gauge (not limited to the sensor, the manometer etc.) and differential pressure gauge (not limited to the sensor, the manometer etc.) feedback information, adjust the flow through the automatically regulated valve, and feed back through the flowmeter, the test medium directly gets back to in the test oil tank this moment, there is liquid level control in the test oil tank, stirring control, temperature control (through the temperature perception, the control is warmed up or is cooled down), liquid level volume balance control etc. are through program control steady operation.

While there have been shown and described what are at present considered the fundamental principles of the invention, its essential features and advantages, the invention further resides in various changes and modifications which fall within the scope of the invention as claimed.