Air inlet pipe structure of sequential supercharging supercharger

Abstract

The utility model relates to the technical field of sequential supercharging systems, and discloses an air inlet pipe structure of a sequential supercharging supercharger, which comprises a pipe body, an air inlet valve assembly and a safety valve assembly, a supercharger compressor is arranged at one end of the pipe body, the air inlet valve assembly is arranged at the other end of the pipe body, and the safety valve assembly is arranged at the other end of the pipe body. The air inlet valve assembly is used for sealing one end of the pipe body, a pressure stabilizing opening is formed in the side wall of the pipe body, one end of the pressure stabilizing opening is communicated with an inner cavity of the pipe body, the other end of the pressure stabilizing opening is communicated with the outside of the pipe body, and the safety valve assembly is used for controlling the pressure stabilizing opening to be communicated with the outside of the pipe body. The problem that due to the fact that the air inlet valve cannot be normally opened, an engine flames out or the mechanical structure of the air inlet valve is damaged can be solved.

Description

Technical Field

[0001] The present application relates to the field of sequential supercharging systems, and in particular to an intake pipe structure of a sequential supercharger. Background Art

[0002] The sequential supercharging system is composed of two or more turbochargers connected in parallel. As the speed and load of the supercharged engine increase, they are put into operation in sequence. When the speed or load is lower than a certain set value, the exhaust gas of one or several turbocharger turbines and the air supply of the compressor are cut off, so that the exhaust gas flows through the working turbocharger turbine, increasing its exhaust gas flow rate and improving the turbine efficiency, so as to make full use of the exhaust gas energy, increase the supercharging pressure, and improve the fuel economy, power and emission of the diesel engine under low working conditions. When the engine speed or load is higher than a certain set value, the cut-off one or several turbochargers are put into use again to ensure the high working performance of the engine.

[0003] At present, the startup of controlled superchargers is mostly done through the engine electronic control system, which controls the delay time between the opening of the supercharged exhaust valve and the opening of the intake valve, so that the intake valve is opened within a fixed time.

[0004] With respect to the above-mentioned related technologies, the inventors believe that when a control system fails and fails to open the intake valve in time, the negative pressure in the intake pipe will continue to rise, thereby causing the engine to stall or the mechanical structure of the intake valve to be damaged. Utility Model Content

[0005] In order to alleviate the problem of engine stalling or mechanical structure damage of the intake valve due to the inability of the intake valve to open normally, the present application provides an intake pipe structure of a sequential supercharger.

[0006] The present application provides an intake pipe structure of a sequential supercharger, which adopts the following technical solution:

[0007] An intake pipe structure of a sequential supercharger comprises a pipe body, an intake valve assembly and a safety valve assembly, wherein a supercharger compressor is arranged at one end of the pipe body, and the intake valve assembly is arranged at the other end of the pipe body, and the intake valve assembly is used to close one end of the pipe body, and a pressure stabilizing port is opened on the side wall of the pipe body, wherein one end of the pressure stabilizing port is connected to the inner cavity of the pipe body, and the other end of the pressure stabilizing port is connected to the outside of the pipe body, and the safety valve assembly is used to control the connection between the pressure stabilizing port and the outside of the pipe body.

[0008] By adopting the above technical scheme, the intake pipe of the supercharger is successively pressurized, and during operation, the inner cavity of the pipe body forms a negative pressure due to the influence of the rotation of the supercharger compressor impeller. When the intake valve assembly cannot be opened due to a problem, resulting in the negative pressure in the inner cavity of the pipe body being greater than the set value, the safety valve assembly opens the pressure-stabilizing port to connect the inner cavity of the pipe body with the external atmosphere, and air enters the inner cavity of the pipe body through the pressure-stabilizing port, thereby alleviating the problem of engine stalling or mechanical structure damage of the intake valve due to the failure of the intake valve to open normally.

[0009] Optionally, the safety valve assembly includes a valve block and a limit assembly, the valve block is used to close the pressure stabilizing port, the limit assembly is connected to the valve block, and the limit assembly is used to limit the movement of the valve block; when the negative pressure in the inner cavity of the tube body is less than a set value, the valve block is inserted into the pressure stabilizing port and closes the pressure stabilizing port, and when the negative pressure in the inner cavity of the tube body is greater than the set value, the valve block overcomes the limitation of the limit assembly and moves out of the pressure stabilizing port to open the pressure stabilizing port.

[0010] By adopting the above technical solution, when the inner cavity of the tube body is in a normal pressure state, the valve block is inserted in the pressure stabilizing port and closes the pressure stabilizing port; when the inner cavity of the tube body is in a negative pressure state but the negative pressure is less than the set value, the valve block is inserted in the pressure stabilizing port and closes the pressure stabilizing port under the action of the limit assembly; when the negative pressure in the inner cavity of the tube body is greater than the set value, the valve block overcomes the limitation of the limit assembly and moves out of the pressure stabilizing port to open the pressure stabilizing port.

[0011] Optionally, the inner diameter of the pressure stabilizing port gradually decreases from the side close to the inner wall of the tube body to the side away from the inner wall of the tube body, the valve block is arranged corresponding to the pressure stabilizing port, the limit assembly is arranged on the outer wall of the tube body, and the limit assembly passes through the pressure stabilizing port and is connected to the valve block.

[0012] By adopting the above technical solution, the inner diameter of the pressure stabilizing port gradually decreases from the side close to the inner wall of the tube body to the side away from the inner wall of the tube body, the limit assembly passes through the pressure stabilizing port and is connected to the valve block, and the valve block and the pressure stabilizing port are arranged correspondingly, so that the valve block cannot leave the inside of the tube body through the pressure stabilizing port under the action of the limit assembly, thereby improving the working stability of the safety valve assembly.

[0013] Optionally, the safety valve assembly also includes an outer shell, which is connected to the outer wall of the tube body, and is used to close the end of the pressure-stabilizing port that is connected to the outside of the tube body. An air inlet is opened on the outer shell, and a filter is arranged in the outer shell, and the filter is used to separate the air inlet and the pressure-stabilizing port.

[0014] By adopting the above technical solution, an outer shell is arranged on the outer side of the pressure stabilizing port, and an air inlet is opened on the outer shell. When the pressure stabilizing port is opened, external air enters the outer shell through the air inlet, and the filter is used to filter foreign matter or coarse particles that may be entrained in the air, thereby avoiding the possibility of external air directly entering the interior of the tube body after the pressure stabilizing port is opened, causing damage to the supercharger.

[0015] Optionally, the air inlet is opened at the top of the outer shell, the filter is arranged horizontally, and the air inlet is located above the filter.

[0016] Optionally, the limiting assembly includes a spring, and the valve block is connected to the inner wall of the outer shell through the spring.

[0017] By adopting the above technical solution, the valve block is connected to the inner wall of the outer shell through the spring. When the atmospheric pressure applied to the valve block is greater than the pulling force applied to the valve block by the spring, the valve block moves toward the inside of the tube body, thereby opening the pressure-stabilizing port.

[0018] Optionally, one end of the spring is fixedly connected to the valve block, and the other end of the spring is connected to an adjusting rod, which is inserted into the side wall of the outer shell, and the adjusting rod is slidably connected to the outer shell. A nut is threaded on the adjusting rod, and the nut is located on the outside of the outer shell. The nut abuts against the outer wall of the outer shell to limit the movement of the adjusting rod.

[0019] By adopting the above technical solution, one end of the spring is connected to the adjusting rod, the adjusting rod is slidably connected to the outer shell, and the sliding adjusting rod changes the force of the spring on the valve block, thereby improving the applicability of the safety valve assembly.

[0020] Optionally, the valve block is passed through the adjusting rod, and the valve block is slidably connected to the adjusting rod.

[0021] By adopting the above technical solution, the valve block is inserted into the adjusting rod, and the adjusting rod is used to guide the movement of the valve block, thereby improving the stability of the valve block reset.

[0022] Optionally, the sliding direction of the valve block is parallel to the flow direction of the gas in the tube body.

[0023] By adopting the above technical solution, the sliding direction of the valve block is parallel to the flow direction of the gas in the pipe body, thereby improving the working stability of the safety valve assembly.

[0024] Optionally, the intake valve assembly includes a raft plate, a rotating shaft and a torsion piece, wherein the rotating shaft is connected between two opposite side walls of the tube body, the raft plate is rotatably connected to the rotating shaft, the raft plate is used to close one end of the tube body, the torsion piece is connected between the tube body and the raft plate, and the torsion piece is used to limit the rotation of the raft plate.

[0025] In summary, the present application includes at least one of the following beneficial technical effects:

[0026] 1. By opening a pressure-stabilizing port on the pipe body, when the intake valve assembly fails to open due to a problem and the negative pressure in the inner cavity of the pipe body is greater than the set value, the safety valve assembly opens the pressure-stabilizing port to connect the inner cavity of the pipe body with the external atmosphere, and air enters the inner cavity of the pipe body through the pressure-stabilizing port, thereby alleviating the problem of engine flameout or mechanical structure damage of the intake valve caused by the failure of the intake valve to open normally;

[0027] 2. By setting an outer shell on the outside of the pressure-stabilizing port, an air inlet is opened on the outer shell. When the pressure-stabilizing port is opened, external air enters the outer shell through the air inlet, and the filter screen is used to filter foreign matter or coarse particles that may be entrained in the air, thereby avoiding the possibility of external air directly entering the tube body after the pressure-stabilizing port is opened, causing damage to the supercharger;

[0028] 3. By inserting the valve block onto the adjusting rod and using the adjusting rod to guide the movement of the valve block, the stability of the valve block reset is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0030] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application;

[0031] Figure 2 It is a structural schematic diagram of the safety valve assembly part in the embodiment of the present application;

[0032] Figure 3 It is a schematic diagram of the structure of the voltage stabilizing port part in the embodiment of the present application;

[0033] Figure 4 It is a schematic diagram of the structure of the limiting component part in the embodiment of the present application.

[0034] Figure numerals: 100, tube body; 110, pressure-stabilizing port; 200, intake valve assembly; 300, safety valve assembly; 310, valve block; 320, limit assembly; 321, spring; 322, adjusting rod; 323, nut; 330, outer shell; 331, air inlet; 340, filter; 400, supercharger compressor. DETAILED DESCRIPTION

[0035] In order to more clearly explain the overall concept of this application, the following Figure 1-4 This application is described in further detail.

[0036] In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present application is not limited by the specific embodiments disclosed below. It should be noted that the embodiments of the present application and the features in each embodiment may be combined with each other without conflict.

[0037] The embodiment of the present application discloses an intake pipe structure of a sequential supercharger. Figure 1 and Figure 2 An intake pipe structure of a sequential supercharger includes a pipe body 100, an intake valve assembly 200 and a safety valve assembly 300. The intake valve assembly 200 is installed at one end of the pipe body 100, and a supercharger compressor 400 is arranged at the other end of the pipe body 100. The intake valve assembly 200 is used to seal the end of the pipe body 100 away from the supercharger compressor 400. A pressure-stabilizing port 110 is provided on the side wall of the pipe body 100, one end of the pressure-stabilizing port 110 is communicated with the inner cavity of the pipe body 100, and the other end of the pressure-stabilizing port 110 is communicated with the outside of the pipe body 100, and the safety valve assembly 300 is used to control the communication between the pressure-stabilizing port 110 and the outside of the pipe body 100.

[0038] The intake valve assembly 200 includes a raft plate, a rotating shaft and a torque member. The rotating shaft is connected between the two opposite side walls of the tube body 100. The raft plate is rotatably connected to the rotating shaft. The raft plate is used to close one end of the tube body 100. The torque member is connected between the tube body 100 and the raft plate. The torque member is used to limit the rotation of the raft plate.

[0039] During the operation of the intake pipe of the sequential supercharger, the inner cavity of the pipe body 100 is affected by the rotation of the impeller of the supercharger compressor 400, and negative pressure is formed. Under the action of the negative pressure, the raft plate overcomes the torsion of the torsion piece and begins to swing downward to open the pipe mouth. When the intake valve assembly 200 fails to open the pipe mouth due to a problem, resulting in the negative pressure in the inner cavity of the pipe body 100 being greater than the set value, the safety valve assembly 300 opens the pressure stabilizing port 110, so that the inner cavity of the pipe body 100 is connected to the external atmosphere, and air enters the inner cavity of the pipe body 100 through the pressure stabilizing port 110, thereby alleviating the problem of engine flameout or mechanical structure damage of the intake valve due to the inability of the intake valve to open normally.

[0040] Reference Figure 3 and Figure 4The safety valve assembly 300 includes a valve block 310 and a limit assembly 320. The valve block 310 is used to close the pressure-stabilizing port 110. The limit assembly 320 is connected to the valve block 310. The limit assembly 320 is used to limit the movement of the valve block 310. When the negative pressure in the inner cavity of the tube body 100 is less than the set value, the valve block 310 is inserted into the pressure-stabilizing port 110 and closes the pressure-stabilizing port 110. When the negative pressure in the inner cavity of the tube body 100 is greater than the set value, the valve block 310 overcomes the restriction of the limit assembly 320 and moves out of the pressure-stabilizing port 110 to open the pressure-stabilizing port 110.

[0041] When the inner cavity of the tube body 100 is in a normal pressure state, the valve block 310 is inserted into the pressure-stabilizing port 110 and closes the pressure-stabilizing port 110. When the inner cavity of the tube body 100 is in a negative pressure state but the negative pressure is less than a set value, the valve block 310 is inserted into the pressure-stabilizing port 110 and closes the pressure-stabilizing port 110 under the action of the limit assembly 320. When the negative pressure in the inner cavity of the tube body 100 is greater than the set value, the valve block 310 overcomes the limitation of the limit assembly 320 and moves out of the pressure-stabilizing port 110 to open the pressure-stabilizing port 110.

[0042] Reference Figure 3 and Figure 4 , the inner diameter of the pressure-stabilizing port 110 gradually decreases from the side close to the inner wall of the tube body 100 to the side away from the inner wall of the tube body 100, the valve block 310 is arranged correspondingly to the pressure-stabilizing port 110, the limit assembly 320 is arranged on the outer wall of the tube body 100, and the limit assembly 320 passes through the pressure-stabilizing port 110 and is connected to the valve block 310. The inner diameter of the pressure-stabilizing port 110 gradually decreases from the side close to the inner wall of the tube body 100 to the side away from the inner wall of the tube body 100, the limit assembly 320 passes through the pressure-stabilizing port 110 and is connected to the valve block 310, and the valve block 310 and the pressure-stabilizing port 110 are arranged correspondingly, so that the valve block 310 cannot leave the interior of the tube body 100 through the pressure-stabilizing port 110 under the action of the limit assembly 320, thereby improving the working stability of the safety valve assembly 300.

[0043] Reference Figure 3 and Figure 4 The safety valve assembly 300 further includes an outer shell 330, which is connected to the outer wall of the tube body 100. The outer shell 330 is used to seal the end of the pressure-stabilizing port 110 that is connected to the outside of the tube body 100. An air inlet 331 is provided on the outer shell 330. A filter screen 340 is provided inside the outer shell 330. The filter screen 340 is used to separate the air inlet 331 from the pressure-stabilizing port 110. The air inlet 331 is provided at the top of the outer shell 330. The filter screen 340 is provided horizontally. The air inlet 331 is located above the filter screen 340.

[0044] By setting an outer shell 330 on the outer side of the pressure-stabilizing port 110, an air inlet 331 is opened on the outer shell 330. When the pressure-stabilizing port 110 is opened, external air enters the outer shell 330 through the air inlet 331, and the filter 340 is used to filter foreign matter or coarse particles that may be entrained in the air, thereby preventing external air from directly entering the interior of the tube body 100 after the pressure-stabilizing port 110 is opened, thereby preventing the possibility of damaging the supercharger.

[0045] Reference Figure 3 and Figure 4 The limit assembly 320 includes a spring 321, and the valve block 310 is connected to the inner wall of the outer shell 330 through the spring 321. The valve block 310 is connected to the inner wall of the outer shell 330 through the spring 321. When the atmospheric pressure applied to the valve block 310 is greater than the pulling force applied to the valve block 310 by the spring 321, the valve block 310 moves toward the inside of the pipe body 100, thereby opening the pressure-stabilizing port 110.

[0046] One end of the spring 321 is fixedly connected to the valve block 310, and the other end of the spring 321 is connected to an adjusting rod 322, which is inserted into the side wall of the outer shell 330, and the adjusting rod 322 is slidably connected to the outer shell 330. A nut 323 is threadedly connected to the adjusting rod 322, and the nut 323 is located outside the outer shell 330. The nut 323 abuts against the outer wall of the outer shell 330 to limit the movement of the adjusting rod 322. By connecting one end of the spring 321 to the adjusting rod 322, the adjusting rod 322 is slidably connected to the outer shell 330, and the sliding adjusting rod 322 changes the force of the spring 321 on the valve block 310, thereby improving the applicability of the safety valve assembly 300.

[0047] Reference Figure 3 and Figure 4 The valve block 310 is inserted into the adjusting rod 322, and the valve block 310 is slidably connected to the adjusting rod 322. By inserting the valve block 310 into the adjusting rod 322, the adjusting rod 322 is used to guide the movement of the valve block 310, thereby improving the stability of the valve block 310 in resetting.

[0048] The sliding direction of the valve block 310 is parallel to the flow direction of the gas in the pipe body 100, thereby improving the working stability of the safety valve assembly.

[0049] Anything not described in this application can be achieved by adopting or drawing on existing technologies.

[0050] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An intake pipe structure of a sequential supercharger, characterized in that: It includes a tube body, an intake valve assembly and a safety valve assembly. A supercharger compressor is arranged at one end of the tube body, and the intake valve assembly is arranged at the other end of the tube body. The intake valve assembly is used to close one end of the tube body. A pressure-stabilizing port is opened on the side wall of the tube body. One end of the pressure-stabilizing port is connected to the inner cavity of the tube body, and the other end of the pressure-stabilizing port is connected to the outside of the tube body. The safety valve assembly is used to control the connection between the pressure-stabilizing port and the outside of the tube body.

2. The intake pipe structure of a sequential supercharger according to claim 1, characterized in that: The safety valve assembly includes a valve block and a limit assembly, the valve block is used to close the pressure-stabilizing port, the limit assembly is connected to the valve block, and the limit assembly is used to limit the movement of the valve block; when the negative pressure in the inner cavity of the tube body is less than a set value, the valve block is inserted into the pressure-stabilizing port and closes the pressure-stabilizing port, and when the negative pressure in the inner cavity of the tube body is greater than the set value, the valve block overcomes the limitation of the limit assembly and moves out of the pressure-stabilizing port to open the pressure-stabilizing port.

3. The intake pipe structure of a sequential supercharger according to claim 2, characterized in that: The inner diameter of the pressure stabilizing port gradually decreases from the side close to the inner wall of the tube body to the side away from the inner wall of the tube body. The valve block is arranged corresponding to the pressure stabilizing port. The limit assembly is arranged on the outer wall of the tube body. The limit assembly passes through the pressure stabilizing port and is connected to the valve block.

4. The intake pipe structure of a sequential supercharger according to claim 2, characterized in that: The safety valve assembly also includes an outer shell, which is connected to the outer wall of the tube body and is used to close the end of the pressure-stabilizing port that is connected to the outside of the tube body. An air inlet is provided on the outer shell, and a filter is provided in the outer shell, which is used to separate the air inlet and the pressure-stabilizing port.

5. The intake pipe structure of a sequential supercharger according to claim 4, characterized in that: The air inlet is opened at the top of the outer shell, the filter screen is arranged horizontally, and the air inlet is located above the filter screen.

6. The air intake pipe structure of a sequential supercharger according to claim 4, characterized in that: The limiting assembly comprises a spring, and the valve block is connected to the inner wall of the outer shell through the spring.

7. The intake pipe structure of a sequential supercharger according to claim 6, characterized in that: One end of the spring is fixedly connected to the valve block, and the other end of the spring is connected to an adjusting rod, which is inserted into the side wall of the outer shell. The adjusting rod is slidably connected to the outer shell, and a nut is threaded on the adjusting rod. The nut is located on the outside of the outer shell, and the nut abuts against the outer wall of the outer shell to limit the movement of the adjusting rod.

8. The intake pipe structure of a sequential supercharger according to claim 7, characterized in that: The valve block is inserted into the adjusting rod, and the valve block is slidably connected with the adjusting rod.

9. The intake pipe structure of a sequential supercharger according to claim 8, characterized in that: The sliding direction of the valve block is parallel to the flow direction of the gas in the pipe body.

10. The intake pipe structure of a sequential supercharger according to claim 1, characterized in that: The intake valve assembly includes a raft plate, a rotating shaft and a torsion piece, wherein the rotating shaft is connected between two opposite side walls of a tube body, the raft plate is rotatably connected to the rotating shaft, the raft plate is used to close one end of the tube body, the torsion piece is connected between the tube body and the raft plate, and the torsion piece is used to limit the rotation of the raft plate.

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