1. The exhaust pressure adjusting device of the engine is characterized by comprising an iris type section adjusting mechanism (1), a plurality of driving mechanisms (2) and a plurality of flange platforms, wherein the driving mechanisms (2) are connected with the section adjusting mechanism (1), the plurality of flange platforms are respectively arranged on two end faces, away from the driving mechanisms (2) and the section adjusting mechanism (1), the flange platforms are detachably connected to an exhaust system, and the driving mechanisms (2) are configured to drive the section adjusting mechanism (1) to continuously adjust the diameter of an exhaust port (111).

2. The exhaust pressure regulating apparatus of an engine according to claim 1, characterized in that the section regulating mechanism (1) comprises a retainer disk (11) and a plurality of vanes (12), the arrangement disc (11) is provided with the exhaust port (111) and an arrangement groove (112), the plurality of blades (12) are positioned in the arrangement groove (112), and a plurality of blades (12) are sequentially arranged on the mounting disc (11) in a surrounding manner and are rotatably connected, the center formed by the surrounding of the plurality of blades (12) is superposed with the center of the exhaust port (111), the mounting plate (11) is fixedly connected with the output end of the driving mechanism (2), the driving mechanism (2) can drive the mounting disc (11) to rotate so as to drive the blades (12) to rotate clockwise or anticlockwise so as to adjust the sectional area of the exhaust port (111).

3. The exhaust pressure regulating device of the engine according to claim 2, characterized in that the flange stages comprise a first flange stage (3) and a second flange stage (4), the first flange stage (3) is disposed on a side of the vane (12) away from the driving mechanism (2), and the second flange stage (4) is movably connected to a side of the driving mechanism (2) away from the vane (12).

4. The exhaust pressure regulating apparatus of the engine according to claim 3, wherein the vane (12) is provided with a first pin body (121) and a second pin body (122) on the front and back surfaces thereof, respectively, the first flange table (3) is provided with a first pin hole (31), the first pin body (121) is inserted into the first pin hole (31) and the first pin body (121) is capable of rotating around a first axis with respect to the first pin hole (31); the corresponding positions of the mounting plate (11) and the driving mechanism (2) are provided with sliding grooves (113), the second pin bodies (122) are matched in the sliding grooves (113), and the driving mechanism (2) drives the second pin bodies (122) to slide in the sliding grooves (113) so as to drive the blades (12) to rotate in the same direction.

5. The exhaust pressure regulating apparatus of an engine according to claim 4, wherein the first pins (121) of a plurality of the vanes (12) are arranged at intervals in a circumferential direction of the retainer disk (11); and the first pin holes (31) are provided in plurality, and the first pin holes (31) are arranged at intervals in the circumferential direction of the first flange table (3).

6. The exhaust pressure regulating apparatus of an engine according to claim 4, wherein the vane (12) has a sickle shape, and the first pin (121) is located at a leading portion of the vane (12), the width of the vane (12) is gradually narrowed from the leading portion to a trailing portion, and a contour line of the vane (12) is a curved line.

7. The exhaust pressure regulating apparatus of an engine according to claim 3, wherein a plurality of said vanes (12) are provided on said retainer plate (11) so as to be offset in height in the direction of the center line of said exhaust port (111), and when said drive mechanism (2) drives said plurality of said vanes (12) to rotate, the tails of said plurality of said vanes (12) are continuously surrounded to form said exhaust port (111) having different diameters.

8. The exhaust pressure regulating apparatus of an engine according to claim 4, wherein said driving mechanism (2) comprises a worm (21) and a gear plate (22), said worm (21) and said gear plate (22) are engaged with each other, said gear plate (22) and said mounting plate (11) are fixedly connected, said slide groove (113) is provided on the corresponding position of said mounting plate (11) and said gear plate (22), said slide groove (113) is engaged with said second pin (122) of said vane (12), when the worm (21) rotates to drive said gear plate (22) and said mounting plate (11) to rotate around the central axis a, said second pin (122) slides in said slide groove (113) to drive a plurality of said vanes (12) to rotate around the central axis a simultaneously.

9. The exhaust pressure regulating apparatus of an engine according to claim 5, characterized in that the mounting plate (11) is provided with scale marks (114), the first flange plate (3) is provided with an indicating member (32), and the indicating member (32) can be directed to the scale marks (114) corresponding to the diameter of the exhaust port (111).

10. The exhaust pressure regulating apparatus of an engine according to claim 8, wherein said first flange plate (3) is of an i-shaped structure, said second flange plate (4) is of a T-shaped structure, said first flange plate (3) is provided with a first clip (33), said second flange plate (4) is provided with a second clip (41), said mounting plate (11) is provided with a first guide rail (115), said gear plate (22) is provided with a second guide rail (221), said first clip (33) is slidably engaged in said first guide rail (115), and said second clip (41) is slidably engaged in said second guide rail (221).

Background

In the stage of engine product development test, the exhaust pressure of the engine has a great influence on the performance and precision of the engine, but a cold flow test method is used when a single body test is carried out on exhaust system parts, so that the hot exhaust flow and the exhaust pressure wave of the engine cannot be truly simulated, therefore, the condition that the exhaust system pressure is different from a target value is often encountered in the stage of engine product development, if a new sample is provided again, the period is long, and the requirement cannot be met in time. The exhaust pressure adjusting device in the prior art, such as a butterfly valve control device, a small-diameter gasket, etc., cannot directly reflect the diameters of the exhaust pipes corresponding to different exhaust pressures or cannot continuously adjust the exhaust pressure, and is poor in applicability.

Disclosure of Invention

The invention aims to provide an exhaust pressure regulating device of an engine, which can continuously regulate different exhaust pressures of the engine and reflect the diameters of exhaust pipes corresponding to the different exhaust pressures.

In order to achieve the purpose, the invention adopts the following technical scheme:

the exhaust pressure adjusting device of the engine comprises an iris type section adjusting mechanism, a plurality of driving mechanisms and a plurality of flange platforms, wherein the driving mechanisms are connected with the section adjusting mechanism, the plurality of flange platforms are respectively arranged on two end faces away from the driving mechanisms and the section adjusting mechanism, the flange platforms are detachably connected to an exhaust system, and the driving mechanisms are configured to drive the section adjusting mechanism to continuously adjust the diameter of an exhaust port.

Optionally, cross-section adjustment mechanism includes mounting disc and a plurality of blade, be equipped with on the mounting disc gas vent and mounting groove, it is a plurality of the blade is located the mounting groove, and a plurality of the blade encloses in proper order to establish rotationally to be connected on the mounting disc, and a plurality of the blade encloses the center of establishing formation with the center coincidence of gas vent, the mounting disc with actuating mechanism's output fixed connection, actuating mechanism can drive thereby the mounting disc rotates and drives a plurality of thereby the blade is followed clockwise or anticlockwise rotation and is adjusted the sectional area of gas vent.

Optionally, the flange table includes a first flange table and a second flange table, the first flange table is disposed on one side of the blade far away from the driving mechanism, and the second flange table is movably connected to one side of the driving mechanism far away from the blade.

Optionally, a first pin body and a second pin body are respectively arranged on the front surface and the back surface of the blade, a first pin hole is formed in the first flange platform, the first pin body is inserted into the first pin hole, and the first pin body can rotate around a first axis relative to the first pin hole; the corresponding positions of the mounting disc and the driving mechanism are provided with sliding grooves, the second pin body is matched in the sliding grooves, and the driving mechanism drives the second pin body to slide in the sliding grooves so as to drive the blades to rotate in the same direction.

Optionally, the first pin bodies on a plurality of blades are arranged at intervals along the circumferential direction of the mounting disc; and the first pin holes are provided with a plurality of pin holes which are arranged at intervals along the circumferential direction of the first flange table.

Optionally, the blade is sickle-shaped, the first pin body is located at the head of the blade, the width of the blade is gradually narrowed from the head to the tail, and the contour line of the blade is a curve.

Optionally, the blades are arranged on the mounting disc in a staggered manner along the direction of the central line of the exhaust port, and when the driving mechanism drives the blades to rotate, the tail portions of the blades continuously surround the exhaust port with different diameters.

Optionally, actuating mechanism includes worm and toothed disc, the worm with toothed disc intermeshing, toothed disc with settling disc fixed connection, settling disc with the toothed disc corresponds to be equipped with on the position the spout, the spout with the blade the cooperation of the second round pin body, thereby rotate as the worm drive toothed disc with settling disc is when rotating around center pin an, the second round pin body is in thereby it drives a plurality ofly to slide in the spout the blade is simultaneously wound center pin a rotates.

Optionally, the arrangement disc is provided with scale marks, the first flange platform is provided with an indication identification member, and the indication identification member can point to the scale marks corresponding to the diameter of the exhaust port.

Optionally, the first flange table is an i-shaped structure, the second flange table is a T-shaped structure, the first flange table is provided with a first buckle, the second flange table is provided with a second buckle, the placing tray is provided with a first guide rail, the gear tray is provided with a second guide rail, the first buckle is slidably connected in the first guide rail in a matching manner, and the second buckle is slidably connected in the second guide rail in a matching manner.

Compared with the prior art, the invention has the beneficial effects that: the driving mechanism can drive the section adjusting mechanism to continuously adjust the diameter of the exhaust port, and the section adjusting mechanism is connected to the exhaust system through the flange platforms arranged on the driving mechanism and the section adjusting mechanism, so that the exhaust pressure of the engine can be continuously adjusted and the diameter of the exhaust pipe corresponding to different exhaust pressures can be reflected on the premise of not damaging the original exhaust system, and compared with the prior art, the exhaust pipe is more direct and convenient.

Drawings

FIG. 1 is a schematic, broken away view of an exhaust pressure regulating device for an engine provided in accordance with an embodiment of the present invention;

FIG. 2 is a schematic diagram of an exhaust pressure regulating device of an engine according to an embodiment of the present invention;

FIG. 3 is a schematic structural view of a blade provided in accordance with an embodiment of the present invention;

FIG. 4 is a top view (maximum opening) of a cross-section adjustment mechanism provided in an embodiment of the present invention;

FIG. 5 is a top view (at a minimum opening) of a cross-section adjustment mechanism provided in an embodiment of the present invention;

FIG. 6 is a schematic diagram of a first flange stage according to an embodiment of the present invention;

FIG. 7 is a schematic illustration of a first flange stage, gear plate and mounting plate in accordance with an embodiment of the present invention;

fig. 8 is a schematic exploded view of a second flange stage, a gear plate and a mounting plate according to an embodiment of the present invention.

Reference numerals:

1-a section adjusting mechanism, 11-a mounting disc, 111-an exhaust port, 112-a mounting groove, 113-a sliding groove, 114-a scale mark, 115-a first guide rail, 12-a blade, 121-a first pin body, and 122-a second pin body; 2-drive mechanism, 21-worm, 22-toothed disc, 221-second guide rail; 3-a first flange platform, 31-a first pin hole, 32-an indication identification part and 33-a first buckle; 4-second flange platform, 41-second buckle.

Detailed Description

In order to make the technical problems solved, the technical solutions adopted and the technical effects achieved by the present invention clearer, the technical solutions of the present invention are further described below by way of specific embodiments with reference to the accompanying drawings.

The specific structure of the exhaust pressure regulating apparatus of an engine according to the embodiment of the present invention will be described with reference to fig. 1 to 8.

As shown in fig. 1 and 2, the present embodiment provides an exhaust pressure adjusting device for an engine, which includes an iris-type section adjusting mechanism 1, a plurality of driving mechanisms 2, and a plurality of flange stages, wherein the driving mechanisms 2 are connected to the section adjusting mechanism 1, the plurality of flange stages are respectively disposed on two end surfaces away from the driving mechanisms 2 and the section adjusting mechanism 1, the flange stages are detachably connected to an exhaust system, and the driving mechanisms 2 are configured to drive the section adjusting mechanism 1 to continuously adjust the diameter of an exhaust port 111.

In the above embodiment, the driving mechanism 2 can drive the section adjusting mechanism 1 to continuously adjust the diameter of the exhaust port 111, and the section adjusting mechanism 1 and the driving mechanism 2 are connected to the exhaust system through the flange platforms, so that the exhaust pressure of the engine can be continuously adjusted and the diameters of the exhaust pipes corresponding to different exhaust pressures can be reflected without destroying the original exhaust system. Specifically, the original exhaust system only needs to disassemble one section of the original exhaust system to leave a gap for installing the exhaust pressure adjusting device, and then the flange table is connected to the gap without changing the structure of the original exhaust system, so that the structure of the exhaust system is not damaged.

Optionally, as shown in fig. 2 to 5, the section adjusting mechanism 1 includes a mounting disc 11 and a plurality of blades 12, the mounting disc 11 is provided with an exhaust port 111 and a mounting groove 112, the plurality of blades 12 are located in the mounting groove 112, the plurality of blades 12 are sequentially surrounded and rotatably connected to the mounting disc 11, a center formed by surrounding the plurality of blades 12 coincides with a center of the exhaust port 111, the mounting disc 11 is fixedly connected to an output end of the driving mechanism 2, and the driving mechanism 2 can drive the mounting disc 11 to rotate so as to drive the plurality of blades 12 to rotate clockwise or counterclockwise, so as to adjust a sectional area of the exhaust port 111.

It can be understood that, since the plurality of blades 12 are sequentially arranged on the mounting plate 11 in a surrounding manner, and the center formed by the plurality of blades 12 in the surrounding manner coincides with the center of the exhaust port 111; and because the plurality of blades 12 are movably connected to the mounting plate 11, when the driving mechanism 2 drives the plurality of blades 12 to rotate clockwise or counterclockwise at the same time, the size of the through hole formed by the surrounding of the plurality of blades 12 affects the diameter of the exhaust port 111, thereby changing and adjusting the exhaust pressure of the engine. In some embodiments, when the driving mechanism 2 drives the plurality of blades 12 to rotate clockwise, the diameter of the exhaust port 111 formed by the plurality of blades 12 in a surrounding manner gradually decreases; similarly, when the driving mechanism 2 drives the plurality of blades 12 to rotate counterclockwise, the diameter of the exhaust port 111 formed by the plurality of blades 12 surrounding the exhaust port gradually increases.

In particular, the number of blades 12 can be chosen to be seven, the through holes enclosed being approximately circular and facilitating the rotation. Under the condition of reducing the cost as much as possible, the seven pieces of the gas are sequentially connected to the mounting plate 11 in a stacked manner, so that the sealing performance of the gas outlet 111 formed by enclosing the tail parts of the plurality of blades 12 is good, namely, the gas is not discharged from the gap between the blades 12 and the blades 12, and the gas outlet 111 enclosed by the plurality of blades 12 tends to be circular. Of course, other choices for the number of blades 12 are possible in other embodiments of the invention.

Alternatively, as shown in fig. 2, the flange table includes a first flange table 3 and a second flange table 4, the first flange table 3 is disposed on a side of the blade 12 away from the driving mechanism 2, and the second flange table 4 is movably connected to a side of the driving mechanism 2 away from the blade 12.

It can be understood that, the first flange platform 3 is arranged on one side of the blade 12 far away from the driving mechanism 2, and the second flange platform 4 is movably connected on one side of the driving mechanism 2 far away from the blade 12, and can be directly connected with an exhaust system of an engine through the first flange platform 3 and the second flange platform 4, so that the structure of the exhaust system cannot be damaged, the exhaust system of the engine does not need to be modified, and the continuous adjustment of the exhaust pressure can be realized. In addition, the second flange table 4 is movably connected with the driving mechanism 2, so that the normal rotation of the driving mechanism 2 is not influenced, and the opening or closing of the blades 12 is ensured.

Optionally, as shown in fig. 3, a first pin 121 and a second pin 122 are respectively disposed on the front and back surfaces of the blade 12, a first pin hole 31 is disposed on the first flange table 3, the first pin 121 is inserted into the first pin hole 31, and the first pin 121 can rotate around a first axis relative to the first pin hole 31; the corresponding positions of the mounting plate 11 and the driving mechanism 2 are provided with a sliding groove 113, the second pin body 122 is matched in the sliding groove 113, and the driving mechanism 2 drives the second pin body 122 to slide in the sliding groove 113 so as to drive the plurality of blades 12 to rotate in the same direction.

It should be noted that, the blade 12 is inserted into the corresponding first pin hole 31 on the flange table through the first pin 121, and can freely rotate around the first pin hole 31, and the other surface of the blade 12 is also provided with the second pin 122, which is embedded in the sliding slot 113 at the corresponding position of the mounting plate 11 and the driving mechanism 2, when the driving mechanism 2 drives the mounting plate 11 to rotate, the blade 12 takes the first pin 121 as the axis, and the second pin 122 moves up and down in the sliding slot 113, so as to drive the plurality of blades 12 to rotate in the same direction, thereby achieving the effect of adjusting the opening degree of the exhaust port 111. The second pin 122 moves in the sliding slot 113 and is limited by the length of the sliding slot 113, that is, the opening diameters corresponding to the two ends reaching the sliding slot 113 are the maximum diameter and the minimum diameter, and the maximum opening and the minimum opening can be calculated by the radian of the blade 12, the radius corresponding to the second pin 122, the angle and the length of the sliding slot 113, and the installation position of the first pin 121.

Specifically, the size of the opening diameter of the exhaust port 111 is influenced by the radian of the vane 12, the installation positions of the first pin body 121 and the second pin body 122, and the design length and angle of the chute 113, and can be flexibly designed to control the size of the actual opening.

Alternatively, the first pins 121 on the plurality of blades 12 are arranged at intervals along the circumferential direction of the mounting disk 11; and first pinhole 31 is equipped with a plurality ofly, and a plurality of first pinholes 31 set up along the circumference direction interval of first flange platform 3 to guarantee as far as possible that the continuous through-hole of establishing of enclosing of a plurality of blades 12 is approximately circular, thereby has guaranteed the accuracy of measured diameter scale.

Alternatively, the vane 12 is in a sickle shape, the first pin 121 is located at the head of the vane 12, the width of the vane 12 gradually narrows from the head to the tail, and the contour line of the vane 12 is a curve. It should be noted that the blades 12 are in the shape of a sickle, which facilitates the closing movement; the plurality of blades 12 rotate in the same direction at the same time so that the diameter of the exhaust port 111 is gradually reduced, and the tails of the plurality of blades 12 are close to the central position of the exhaust port 111 to reduce the diameter of the exhaust port 111; similarly, the plurality of blades 12 rotate in the reverse direction simultaneously to make the diameter of the exhaust port 111 gradually increase, and then the tails of the plurality of blades 12 move away from the center of the exhaust port 111 to increase the diameter of the exhaust port 111, so as to continuously adjust the exhaust pressure.

Supplementary note, the width of the blade 12 gradually narrows from the head to the tail, which can achieve higher precision and higher controllability in adjusting the diameter of the exhaust port 111; and the contour line of the blade 12 is a curve, the plurality of blades 12 are surrounded to form a new exhaust port 111 which tends to be circular, and the diameter of the new exhaust port has more data reference value. Of course, in other embodiments of the present invention, the shape and size of the blade 12 are not particularly limited, and may be adaptively changed according to actual needs.

Alternatively, the plurality of blades 12 are arranged on the setting disc 11 in a staggered manner along the center line direction of the exhaust port 111, and when the driving mechanism 2 drives the plurality of blades 12 to rotate, the tail parts of the plurality of blades 12 continuously enclose the exhaust port 111 with different diameters. It can be understood that, the plurality of blades 12 are arranged on the mounting plate 11 in a staggered manner, when the driving mechanism 2 drives the plurality of blades 12 to rotate, the tails of the plurality of blades 12 do not obstruct each other to prevent the blades from rotating, and the tails of the plurality of blades 12 continuously surround the exhaust ports 111 which can form different diameters.

Alternatively, as shown in fig. 2, the driving mechanism 2 includes a worm 21 and a gear plate 22, the worm 21 and the gear plate 22 are engaged with each other, the gear plate 22 and the setting plate 11 are fixedly connected, a sliding slot 113 is provided on the corresponding position of the setting plate 11 and the gear plate 22, the sliding slot 113 is engaged with the second pin 122 of the vane 12, and when the worm 21 rotates to drive the gear plate 22 and the setting plate 11 to rotate around the central axis a, the second pin 122 slides in the sliding slot 113 to drive the plurality of vanes 12 to rotate around the central axis a at the same time.

It should be noted that, firstly, the worm 21 rotates around its own length direction, so that the gear disc 22 engaged with the worm 21 rotates around the central axis a, and since the gear disc 22 is fixedly connected with the installation disc 11, the gear disc 22 drives the installation disc 11 to synchronously rotate around the central axis a, and since the chute 113 is matched with the second pin 122 of the vane 12, the vanes 12 rotate around clockwise or counterclockwise under the driving of the installation disc 11, so as to adjust the diameter of the exhaust port 111, that is, to achieve the function of adjusting the opening degree.

Optionally, as shown in fig. 1, scale marks 114 are arranged on the mounting plate 11, the indication identifier 32 is arranged on the first flange table 3, the indication identifier 32 can point to the scale marks 114 corresponding to the diameters of the exhaust ports 111, and the scale marks 114 can reflect the sizes of the diameters of the exhaust pipes corresponding to different exhaust pressures, so as to provide a real and effective data reference for the design of the exhaust system.

Alternatively, as shown in fig. 7 and 8, the first flange table 3 is an i-shaped structure, the second flange table 4 is a T-shaped structure, the first clip 33 is disposed on the first flange table 3, the second clip 41 is disposed on the second flange table 4, the first guide rail 115 is disposed in the mounting tray 11, the second guide rail 221 is disposed on the gear tray 22, the first clip 33 is slidably engaged in the first guide rail 115, and the second clip 41 is slidably engaged in the second guide rail 221.

It can be understood that the first flange stage 3 and the second flange stage 4 of the exhaust pressure adjusting device are respectively mounted on the first guide rail 115 of the mounting plate 11 and the second guide rail 221 of the gear plate 22 through the first catch 33 and the second catch 41, so that the gear plate 22 and the mounting plate 11 can freely rotate.

Specifically, the first buckle 33 and the second buckle 41 are both made of elastic members, and the toughness of the elastic members is better.

In particular, the chute 113 may be selected to be a chute 113 that provides greater flexibility in rotating the blades 12.

In conclusion, the exhaust pressure regulating device of the engine does not need to modify an engine exhaust system, can realize continuous regulation of the exhaust pressure, can read the diameters corresponding to different exhaust pressures, and provides important parameters for an exhaust system designer.

In the description herein, references to the description of "some embodiments," "other embodiments," or the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Further, it is to be understood that the terms "upper", "lower", "inner", "outer", "vertical", "horizontal", and the like, as used herein, refer to an orientation or positional relationship based on that shown in the drawings, which is for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

In the present invention, unless otherwise expressly stated or limited, the terms "connected," "mounted," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other suitable relationship. Those skilled in the art can understand the above specific meanings included in the present invention according to specific situations.

Furthermore, features defined as "first" and "second" may explicitly or implicitly include one or more of the features for distinguishing between descriptive features, non-sequential, non-trivial and non-trivial. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

The above description is only a preferred embodiment of the present invention, and for those skilled in the art, the present invention should not be limited by the description of the present invention, which should be interpreted as a limitation.