CN218766011U

CN218766011U - Regulator and supercharger for plateau bench test of engine

Info

Publication number: CN218766011U
Application number: CN202223115287.1U
Authority: CN
Inventors: 赵从龙; 代凯; 赵鸿斌
Original assignee: Dongfeng Cummins Engine Co Ltd
Current assignee: Dongfeng Cummins Engine Co Ltd
Priority date: 2022-11-23
Filing date: 2022-11-23
Publication date: 2023-03-28
Anticipated expiration: 2032-11-23

Abstract

The utility model provides an engine plateau rack test is with regulator, which comprises a housin, be provided with the diaphragm in the casing, the diaphragm separates for mutual non-intercommunicating and sealed first cavity and second cavity with the casing, be provided with the spring in the second cavity and be used for opening and close the link mechanism of bypass valve, link mechanism includes the straight-bar, the one end of straight-bar is fixed with the diaphragm, the casing is stretched out from the second cavity to the other end of straight-bar, the spring housing is on the straight-bar, be provided with first suction nozzle and the second suction nozzle that communicates with first cavity and second cavity respectively on the casing, first suction nozzle is used for being connected with the gas outlet of compressor, the second suction nozzle is used for being connected with the compressor air inlet. A supercharger comprising the above regulator is also provided. The air of the air inlet of the compressor is introduced into the second cavity by the regulator, so that a low-pressure environment is formed in the second cavity, and the simulation result is guaranteed to meet the actual condition.

Description

Regulator and supercharger for plateau bench test of engine

Technical Field

The utility model relates to an internal-combustion engine plateau rack technical field, concretely relates to regulator and booster are used in test of engine plateau rack.

Background

Because the plateau oxygen is thin, the oxygen intake in the engine cylinder is reduced, the combustion efficiency is reduced, the energy provided by the engine can be attenuated, whether the engine can be normally used in the plateau environment or not and whether the emission standard is met or not are required to carry out simulation test on the working condition of the engine under the plateau condition.

At present, a plateau simulation bench is mostly adopted by an engine manufacturer to replace a field plateau test, the air pressure of an air inlet of a supercharger needs to be reduced in the plateau simulation bench to simulate the environmental pressures under different altitudes, and further the purpose of replacing the field plateau test by the plateau bench test is achieved.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an engine plateau rack test is with regulator and booster to prior art's defect for simulate real plateau environment, improved the accuracy of simulation result.

The utility model provides an engine plateau rack test is with regulator, which comprises a housin, be provided with the diaphragm in the casing, the diaphragm separates for mutual non-intercommunicating and sealed first cavity and second cavity with the casing, be provided with the spring in the second cavity and be used for opening and close the link mechanism of bypass valve, link mechanism includes the straight-bar, the one end of straight-bar is fixed with the diaphragm, the casing is stretched out from the second cavity to the other end of straight-bar, the spring housing is on the straight-bar, be provided with first suction nozzle and the second suction nozzle that communicates with first cavity and second cavity respectively on the casing, first suction nozzle is used for being connected with the gas outlet of compressor, the second suction nozzle is used for being connected with the compressor air inlet.

Further, be provided with the detection mouth on the casing, the one end and the second cavity of detecting the mouth are connected, the other end that detects the mouth is used for being connected with the pressure measurement pipe.

Furthermore, the detection nozzle, the first air inlet nozzle and the second air inlet nozzle are all provided with bosses along the circumferential direction.

Further, the link mechanism comprises a first link and a second link, wherein a thread is arranged at one end of the straight rod extending out of the shell, one end of the first link is sleeved at one end of the straight rod extending out of the shell, the other end of the first link is hinged with the second link, and the second link is used for being connected with a bypass valve of the supercharger.

Furthermore, the straight rod extends out of the shell and is sealed through sealant.

Furthermore, a circumferential groove is formed in the shell, and the outer edge of the diaphragm is arranged in the groove.

The utility model provides a include the booster of regulator, including gas turbine and the compressor of being connected with gas turbine, the compressor is provided with air inlet and gas outlet, the first suction nozzle of regulator is connected with the gas outlet through first trachea, the second suction nozzle of regulator passes through the second trachea and is connected with the air inlet, the last bypass valve that is provided with of gas turbine, the bypass valve is connected with link mechanism.

Compared with the prior art, the utility model discloses a process a second suction nozzle on the casing of regulator, in introducing the second cavity with the air of the air inlet of compressor, make the second cavity internal pressure of regulator unanimous with the air pressure of the air inlet of compressor, more real simulation plateau atmospheric pressure environment has guaranteed that the simulation result accords with actual conditions.

Drawings

FIG. 1 is a schematic view of the structure of the regulator of the present invention;

FIG. 2 is a schematic structural view of the supercharger of the present invention;

reference numerals are as follows: 1-a shell; 2-a membrane; 3-a first cavity; 4-a second cavity; 5-a spring; 6-straight rod; 7-a first link; 8-a second link; 9-a first air inlet nozzle; 10-a second air inlet nozzle; 11-a detection mouth; 12-a boss; 13-sealing glue; 14-a compressor; 15-a gas turbine; 16-an air inlet; 17-air outlet.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present application clearer, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

As shown in fig. 1, an adjuster for testing plateau bench of engine comprises a shell 1, a diaphragm 2 is arranged in the shell 1, the diaphragm 2 separates the interior of the shell 1 into a first cavity 3 and a second cavity 4 which are not communicated with each other and are sealed, a spring 5 and a link mechanism for opening and closing a bypass valve are arranged in the second cavity 4, the link mechanism comprises a straight rod 6, one end of the straight rod 6 is fixed with the diaphragm 2, the other end of the straight rod 6 extends out of the shell 1 from the second cavity 4, the spring 5 is sleeved on the straight rod 6, a first air inlet nozzle 9 and a second air inlet nozzle 10 which are communicated with the first cavity 3 and the second cavity 4 respectively are arranged on the shell 1, the first air inlet nozzle 9 is used for being connected with an air outlet 17 of a compressor 14, and the second air inlet nozzle 10 is used for being connected with an air inlet 16 of the compressor 14.

It can be understood that fresh air is low-pressure gas when entering the compressor 14, a small part of the low-pressure gas enters the second cavity 4 of the regulator through the second air inlet nozzle 10, other low-pressure gas is compressed through the compressor 14, and then the other low-pressure gas enters the first cavity 3 through the first air inlet nozzle 9, so that the air pressure in the first cavity 3 is larger than the air pressure in the second cavity 4, the diaphragm 2 is pressed against the spring 5 towards one side of the second cavity 4 and pushes the straight rod 6, and when the pressure of the air outlet 17 of the compressor 14 reaches a certain value, the moving distance of the straight rod 6 reaches the opening threshold of the bypass valve, and the linkage mechanism drives the bypass valve to open. In the process, the air pressure in the second cavity 4 in the prior art is the atmospheric pressure of the current environment, so that the plateau environment cannot be simulated really, and the regulator introduces the low-pressure fresh air sucked into the compressor 14 into the second cavity 4 through the second air inlet nozzle 10, so that the second cavity 4 is in the low-pressure environment, the plateau environment can be simulated really, and other structures are not required to be added.

In some embodiments, a detection nozzle 11 is disposed on the housing 1, one end of the detection nozzle 11 is connected to the second cavity 4, and the other end of the detection nozzle 11 is used for connecting to a pressure measurement pipe.

Specifically, the detecting nozzle 11 is used for detecting the air pressure in the second cavity 4, and monitoring whether the air pressure in the second cavity 4 reaches a low-pressure environment required for simulation.

Further, the detection nozzle 11, the first air inlet nozzle 9 and the second air inlet nozzle 10 are all provided with bosses 12 along the circumferential direction.

The bosses 12 are arranged on the detection nozzle 11, the first air inlet nozzle 9 and the second air inlet nozzle 10 in the circumferential direction, and then the detection nozzle 11, the first air inlet nozzle 9 and the second air inlet nozzle 10 are sleeved with the rubber pipes, so that the airtightness of the first cavity 3 and the second cavity 4 is guaranteed.

In some embodiments, the link mechanism includes a first link 7 and a second link 8, wherein a thread is provided at an end of the straight rod 6 extending out of the housing 1, an end of the first link 7 is sleeved on an end of the straight rod 6 extending out of the housing 1, another end of the first link 7 is hinged to the second link 8, and the second link 8 is used for connecting with a bypass valve of the supercharger.

Specifically, a threaded hole is formed in the first link 7, one end of the straight rod 6, which extends out of the housing 1, is inserted into the threaded hole of the first link 7, and the length of the link mechanism can be adjusted by rotating the first link 7, so that the pressure required for opening the bypass valve is changed.

Specifically, the straight rod 6 extends out of the shell 1 and is sealed through a sealant 13. The casing 1 is provided with a circumferential groove, and the outer edge of the diaphragm 2 is arranged in the groove.

As shown in fig. 2, the following description will be made in detail with a supercharger including the above regulator, including a gas turbine 15 and a compressor 14 connected to the gas turbine 15, where the compressor 14 is provided with an air inlet 16 and an air outlet 17, a first air inlet nozzle 9 of the regulator is connected to the air outlet 17 through a first air pipe, a second air inlet nozzle 10 of the regulator is connected to the air inlet 16 through a second air pipe, and the gas turbine 15 is provided with a bypass valve connected to a link mechanism.

Specifically, be provided with first impeller in the gas turbine 15, be provided with the second impeller in the compressor 14, first impeller and second impeller setting are on same axis of rotation, and engine exhaust's waste gas can drive first impeller through gas turbine 15 and rotate, and then drive the second impeller and rotate, and the second impeller can inhale fresh air from the air inlet 16 of compressor 14 and compress, provides the air after the compression for the engine through the gas outlet 17 of compressor 14 to improve the oxygen inlet volume in the engine cylinder. The first air inlet nozzle 9 of the regulator is connected with the position of the compressor 14 close to the air outlet 17 through a first air pipe, so that compressed air can enter the first cavity 3, the second air inlet nozzle 10 of the regulator is connected with the position of the compressor 14 close to the air inlet 16 through a second air pipe, so that low-pressure fresh air can enter the second cavity 4, and the plateau environment is simulated.

It can be understood that exhaust gas exhausted from the engine passes through the gas turbine 15 and drives the first impeller to rotate, so as to drive the second impeller coaxial with the first impeller to rotate, the second impeller rotates to enable low-pressure fresh air to be sucked from the air inlet 16 of the compressor 14, after the air enters the compressor 14, the air firstly enters the second cavity 4 of the regulator from the second air inlet nozzle 10, other air is compressed by the compressor 14 to form high-pressure gas, when the high-pressure gas is conveyed to the engine through the air outlet 17 of the compressor 14, part of the high-pressure gas enters the first cavity 3 of the regulator through the first air inlet nozzle 9, as the rotating speed of the engine increases, the pressure at the air outlet 17 of the compressor 14 also increases, when the pressure at the air outlet 17 of the compressor 14 reaches a certain value, the high-pressure gas in the first cavity 3 can extrude the diaphragm 2 and the spring 5 to move towards the second cavity 4, so as to push the straight rod 6, the straight rod 6 pushes through the first connecting rod 7 and the second connecting rod 8, so as to open excess exhaust gas in the gas turbine 15, thereby preventing the waste gas from damaging the bypass valve, and realizing the function of the supercharger, thereby realizing the function of protecting the supercharger.

The working conditions in the plateau environment are simulated by introducing low-pressure air at the air inlet 16 of the compressor 14 into the second cavity 4 of the regulator through the second inlet nozzle 10, so that the simulation result conforms to the actual working condition of the engine in the plateau environment.

The above-mentioned embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present application and are intended to be included within the scope of the present application.

Claims

1. The utility model provides a regulator is used in test of engine plateau rack which characterized in that: the compressor bypass valve is characterized by comprising a shell (1), wherein a diaphragm (2) is arranged in the shell (1), the interior of the shell (1) is divided into a first cavity (3) and a second cavity (4) which are not communicated with each other and are sealed by the diaphragm (2), a spring (5) and a link mechanism for opening and closing the bypass valve are arranged in the second cavity (4), the link mechanism comprises a straight rod (6), one end of the straight rod (6) is fixed with the diaphragm (2), the other end of the straight rod (6) extends out of the shell (1) from the second cavity (4), the spring (5) is sleeved on the straight rod (6), a first air inlet nozzle (9) and a second air inlet nozzle (10) which are communicated with the first cavity (3) and the second cavity (4) respectively are arranged on the shell (1), the first air inlet nozzle (9) is used for being connected with an air outlet (17) of the compressor (14), and the second air inlet nozzle (10) is used for being connected with an air inlet (16) of the compressor (14).

2. The regulator of claim 1, wherein: be provided with on casing (1) and detect mouth (11), the one end and the second cavity (4) of detecting mouth (11) are connected, the other end of detecting mouth (11) is used for being connected with the pressure measurement pipe.

3. The regulator of claim 2, wherein: the detection nozzle (11), the first air inlet nozzle (9) and the second air inlet nozzle (10) are provided with bosses (12) along the circumferential direction.

4. The regulator according to any one of claims 1 to 3, wherein: the connecting rod mechanism comprises a first connecting rod (7) and a second connecting rod (8), wherein a thread is arranged at one end, extending out of the shell (1), of the straight rod (6), one end, extending out of the shell (1), of the first connecting rod (7) is sleeved at one end, extending out of the shell (1), of the straight rod (6), the other end of the first connecting rod (7) is hinged to the second connecting rod (8), and the second connecting rod (8) is used for being connected with a bypass valve of a supercharger.

5. The regulator of claim 1, wherein: the straight rod (6) extends out of the shell (1) and is sealed through a sealant (13).

6. The regulator of claim 1, wherein: the casing (1) is provided with a circumferential groove, and the outer edge of the diaphragm (2) is arranged in the groove.

7. A supercharger comprising a regulator according to any one of claims 1 to 6, wherein: compressor (14) of being connected including gas turbine (15) and with gas turbine (15), compressor (14) are provided with air inlet (16) and gas outlet (17), first suction nozzle (9) of regulator are connected with gas outlet (17) through first trachea, second suction nozzle (10) of regulator are connected with air inlet (16) through the second trachea, be provided with the bypass valve on gas turbine (15), the bypass valve is connected with link mechanism.