Gas seal plate assembly and automotive turbocharger

Abstract

The present application relates to the technical field of automobile turbocharger, and particularly relates to a gas seal plate assembly and an automobile turbocharger. The gas seal plate assembly comprises a pressure shell with a connecting ring fixedly connected at one end, an intermediate shell with a plate coaxially connected at an end, and a plurality of locking mechanisms equidistantly arranged around the connecting ring. Each locking mechanism comprises a locking bin, a radial pin block, an axial pin block, a transmission assembly, an air-tight bin and a pushing assembly. The device uses high-pressure gas in the pressure shell as a power source, converts the gas pressure into axial compression force through the air-tight bin and the pushing assembly. The higher the gas pressure in the pressure shell, the stronger the axial compression effect on the plate, and the compression amount of the sealing ring is synchronously improved. The higher the gas pressure, the tighter the sealing, and a self-tightening effect is formed. The sealing gap attenuation caused by mechanical vibration can be compensated, and the defects of gas leakage and sealing compression force reduction caused by traditional bolt loosening can be avoided.

Description

Technical Field

[0001] This invention relates to an air seal plate assembly, and more particularly to an air seal plate assembly and an automotive turbocharger, belonging to the technical field of automotive turbochargers. Background Technology

[0002] An automotive turbocharger is a forced intake device that utilizes the residual energy of the high-temperature, high-pressure exhaust gas from the engine. The turbocharger is divided into three chambers along its rotor shaft: the turbine end, the compressor end, and the intermediate housing. It recovers the kinetic energy of the previously wasted exhaust gas to compress fresh intake air, significantly increasing power output without increasing engine displacement. It is one of the key components for achieving energy conservation and efficiency in automotive engines. In existing turbocharger structures, the gas seal plate is mainly located at the junction of the pressure housing and the intermediate housing. A sealing gasket is placed between them, and the connection is secured with bolts to achieve a gas seal at the junction.

[0003] During actual operation, turbochargers continuously generate mechanical vibrations due to the combined effects of vehicle travel bumps and their own high-speed rotation. Under long-term vibration loads, the fastening bolts between the air seal plate and the pressure housing are prone to loosening, causing a decrease in the compressive force of the air seal plate on the gasket, a decline in the sealing performance of the gasket, and a tendency for gas leakage at the connection point. This directly affects the working performance and operational stability of the turbocharger. In addition, turbochargers are usually installed in the engine compartment of a car, where the surrounding space is small and operation is restricted. When performing maintenance on the turbocharger, it is necessary to repeatedly disassemble and assemble the air seal plate. Due to the limited space and obstructed view, it is very difficult to align the bolt holes on the air seal plate with the corresponding bolt holes on the pressure housing. This results in low efficiency in disassembly and assembly of the air seal plate, high installation difficulty, and high maintenance time and cost. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides an air seal plate assembly with high sealing reliability and operational stability, and easy disassembly and maintenance, as well as an automotive turbocharger equipped with the air seal plate assembly.

[0005] The technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows: An air-sealing plate assembly includes a pressure housing with a connecting ring fixedly connected to one end and an intermediate housing with a plate coaxially connected to the other end, and a plurality of locking mechanisms equidistantly arranged around the connecting ring. Each locking mechanism includes a locking chamber, a radial pin, an axial pin, a transmission assembly, an airtight chamber, and a pushing assembly. The plate has a ring-shaped snap-fit ​​protrusion for embedding a sealing ring on the side near the pressure housing. The sealing ring is embedded in the snap-fit ​​protrusion. The connecting ring has a snap-fit ​​groove on the side near the plate for the sealing ring to snap into. The locking chamber is located on the side wall of the connecting ring, and a radial groove is provided on the side of the connecting ring near the axis of the connecting ring for the radial pin block to slide. The transmission assembly is located on the locking chamber and is used to drive the radial pin block to reciprocate along the radial direction of the connecting ring. The axial pin block is slidably fitted to one end of the radial pin block near the axis of the connecting ring, and can slide back and forth along the axial direction of the connecting ring; The airtight chamber is fixedly connected to the plate surface and its interior is connected to the interior of the pressure housing. The pushing assembly is set on the airtight chamber. The high-pressure gas inside the pressure housing can enter the airtight chamber and drive the pushing end of the pushing assembly to squeeze the axial pin block, causing the axial pin block to move along the connecting ring toward one side of the pressure housing.

[0006] Furthermore, two guide rods are symmetrically connected on the inner wall of the radial groove, and the guide rods extend radially along the connecting ring. The end of the radial pin block away from the axial pin block is provided with a guide hole corresponding to the two guide rods in the radial direction of the connecting ring, and the end of the guide rod is slidably disposed in the corresponding guide hole.

[0007] Furthermore, two radially connected reset slots are symmetrically formed inside the locking chamber. Two reset plates are fixedly connected to one side of the radial pin block, and the two reset plates correspond one-to-one with the two reset slots. A reset spring is provided between the side of the reset plate near the axis of the connecting ring and the reset slot.

[0008] Furthermore, the radial pin block has a beveled portion at one end away from the axial pin block, and the beveled portion is located between the two guide rods. The radial pin block has an axial groove at one end near the axial pin block, and a sliding protrusion is provided along the connecting ring axially inside the radial groove. The axial pin block has a sliding protrusion connected to the radial pin block at one end, and a sliding groove suitable for sliding connection with the sliding protrusion is provided on the sliding protrusion. Several pressure blocks are provided on the side of the plate away from the pressure housing. The pressure blocks are equidistantly arranged around the axis of the plate, and each pressure block corresponds to a locking mechanism. The axial pin block has a pressing bevel at one end away from the radial pin block, and a pressing bevel corresponding to the pressing bevel is provided on the pressing bevel, and the pressing bevel and the pressing bevel are in movable contact.

[0009] Furthermore, the axial groove is symmetrically provided with two elastic plates, and the two ends of the elastic plates are respectively connected to the side of the sliding protrusion near the pressure housing and the side wall of the axial groove.

[0010] Furthermore, the transmission assembly includes a transmission bolt and a transmission block; the transmission block is provided with a second inclined surface corresponding to the first inclined surface, the first inclined surface and the second inclined surface are movably abutting each other, the transmission block is provided with a rotating protrusion, the transmission bolt extends axially along the connecting ring, one end of which passes through the locking chamber and extends into the radial groove, and is rotatably connected with the rotating protrusion, the inner wall of the radial groove is provided with a buffer groove for the transmission block to pass through, and the buffer groove is located on the movement trajectory of the transmission block.

[0011] Furthermore, the transmission assembly also includes a second guide rod. Both sides of the rotating protrusion are connected to guide protrusions. The second guide rod extends along the axial direction of the connecting ring. There are two second guide rods, and each of the two second guide rods corresponds to one of the two guide protrusions. One end of the second guide rod is connected to the inner wall of the radial groove, and the other end passes through the corresponding guide protrusion and is slidably connected to the guide protrusion.

[0012] Furthermore, the interior of the airtight chamber is connected to the pressure shell through vent holes opened on the plate. The pushing assembly includes a pushing rod, a piston plate, a conical block, a telescopic spring, and a wedge block. The pushing rod extends radially along the connecting ring, and one end of the pushing rod penetrates the side wall of the airtight chamber and is slidably connected to the side wall of the airtight chamber. Both ends of the pushing rod are provided with spherical portions. The wedge block is fixedly connected to the axial pin block. The wedge block is provided with an arc-shaped portion, and the arc-shaped portion movably abuts against the spherical portion of the pushing rod. The piston plate is slidably connected to the airtight chamber along the axial direction. The conical block is coaxially connected to the side of the piston plate away from the pressure shell. The end of the pushing rod away from the wedge block abuts against the inclined side of the conical block. A spring plate is connected to the rod body of the pushing rod located inside the airtight chamber. The telescopic spring is sleeved on the outside of the pushing rod, and both ends of the telescopic spring are respectively connected to the spring plate and the inner wall of the airtight chamber.

[0013] Furthermore, a number of sliding rods are arranged axially along the connecting ring inside the airtight chamber. Each sliding rod passes through the piston plate and is slidably connected to the piston plate. A sealing strip is provided on the side wall of the piston plate, and the sealing strip abuts against the inner wall of the airtight chamber.

[0014] The present invention also provides an automotive turbocharger, which includes the air seal assembly, the air seal assembly being disposed on the turbocharger body.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: (1) The air seal plate assembly of the present invention uses the high pressure gas inside the pressure shell as a power source. The air pressure is converted into axial clamping force through the airtight chamber and the pushing component. The higher the air pressure inside the pressure shell, the stronger the axial clamping effect on the plate. The compression of the sealing ring is increased simultaneously, forming a self-tightening effect of higher air pressure and tighter seal. It can compensate for the attenuation of sealing gap caused by mechanical vibration in real time, avoid the defects of reduced sealing clamping force and gas leakage after loosening of traditional bolts, and ensure the sealing reliability and working stability of the turbocharger in long-term operation. (2) When assembling the air seal plate assembly, it is not necessary to align the circumferentially distributed bolt holes. It is only necessary to keep the plate and the connecting ring coaxially aligned. Then, the radial pin block is driven to feed radially by rotating the transmission bolt. Axial pre-locking can be completed by the cooperation of the axial pin block and the inclined surface of the pressure block. It is suitable for the narrow space of the engine compartment and the working environment with limited visibility, which greatly reduces the operation threshold of installation and alignment. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a cross-sectional structural diagram of the present invention; Figure 3 For the present invention Figure 1 Schematic diagram of the middle section; Figure 4 For the present invention Figure 3 A schematic diagram of the cross-sectional structure; Figure 5 For the present invention Figure 4 Enlarged schematic diagram of the structure at point A in the middle; Figure 6 For the present invention Figure 4 Enlarged schematic diagram of the structure at point B; Figure 7 This is a partial structural schematic diagram of the present invention; Figure 8 This is an exploded structural diagram of the radial pin block and the axial pin block of the present invention.

[0017] In the diagram: 1. Pressure housing, 2. Intermediate housing, 3. Locking chamber, 4. Radial pin block, 5. Axial pin block, 6. Airtight chamber, 7. Snap-fit ​​protrusion, 8. Sealing ring, 9. Radial groove, 10. Connecting ring, 11. Plate, 12. Guide rod one, 13. Reset plate, 14. Reset spring, 15. Inclined surface one, 16. Sliding protrusion one, 17. Sliding protrusion two, 18. Sliding groove, 19. Extrusion inclined surface, 20. Pressure inclined surface, 21. Elastic sheet, 22. Axial groove, 23. Transmission bolt, 24. Transmission block, 25. Rotating protrusion, 26. Buffer groove, 27. Inclined surface two, 28. Guide protrusion, 29. Guide rod two, 30. Push rod, 31. Piston plate, 32. Conical block, 33. Telescopic spring, 34. Wedge block, 35. Sliding rod, 36. Sealing strip, 37. Main body, 38. Spring plate. Detailed Implementation

[0018] The technical solution of the present invention will be further described in a non-limiting manner below with reference to the accompanying drawings and specific embodiments.

[0019] like Figures 1-8 As shown, an automotive turbocharger includes an air seal plate assembly mounted on the turbocharger body 37. The air seal plate assembly includes a pressure housing 1 with a connecting ring 10 fixedly connected to one end, an intermediate housing 2 with a plate 11 coaxially connected to the other end, and a plurality of locking mechanisms equidistantly arranged around the connecting ring 10. Each locking mechanism includes a locking chamber 3, a radial pin block 4, an axial pin block 5, a transmission assembly, an airtight chamber 6, and a pushing assembly. The plate 11 is provided with a ring-shaped snap-fit ​​protrusion 7 on the side near the pressure housing 1. A sealing ring 8 is provided on the snap-fit ​​protrusion 7. The connecting ring 10 is provided with a snap-fit ​​groove on the side near the plate 11 for the sealing ring 8 to snap into. In use, the plate 11 is pushed closer to the connecting ring 10. The ring-shaped snap-fit ​​protrusion 7 on the side of the plate 11 facing the pressure housing 1 is embedded into the snap-fit ​​groove on the end face of the connecting ring 10. The sealing ring 8 installed on the snap-fit ​​protrusion 7 enters the groove cavity at the same time as the snap-fit ​​protrusion 7 and fits against the inner wall of the groove to form a preliminary sealing interface. The locking chamber 3 is disposed on the side wall of the connecting ring 10, and a radial groove 9 for sliding of the radial pin block 4 is provided on the side near the axis of the connecting ring 10. The transmission assembly is disposed on the locking chamber 3 and is used to drive the radial pin block 4 to reciprocate radially along the connecting ring 10. The axial pin 5 is slidably engaged with one end of the radial pin 4 near the axis of the connecting ring 10, and can reciprocate along the axial direction of the connecting ring 10. The airtight chamber 6 is fixedly connected to the plate surface of the plate 11, and its interior is connected to the interior of the pressure housing 1. The pushing assembly is set on the airtight chamber 6. The high-pressure gas inside the pressure housing 1 can enter the airtight chamber 6 and drive the pushing end of the pushing assembly to squeeze the axial pin 5, so that the axial pin 5 moves axially toward the side of the pressure housing 1 along the connecting ring 10. In use, the air sealing plate is mechanically pre-locked and pneumatically self-tightened by several locking mechanisms, so as to achieve reliable sealing and convenient disassembly and assembly of the plate 11 on the pressure housing 1.

[0020] Specifically, two guide rods 12 are symmetrically connected on the inner wall of the radial groove 9, and the guide rods 12 extend radially along the connecting ring 10. The end of the radial pin block 4 away from the axial pin block 5 is provided with a guide hole corresponding to the two guide rods 12 in the radial direction along the connecting ring 10. The end of the guide rod 12 is slidably embedded in the corresponding guide hole. The guide hole at the end of the radial pin block 4 slides smoothly along the guide rod 12 in the radial groove 9 to ensure that the movement direction of the radial pin block 4 is not deviated.

[0021] The locking chamber 3 has two symmetrically connected radial sliding grooves 9 for resetting slots. Two resetting plates 13 are fixedly connected to one side of the radial pin block 4, and the two resetting plates 13 correspond one-to-one with the two resetting slots. A resetting spring 14 is provided between the side of the resetting plate 13 near the axis of the connecting ring 10 and the resetting slot. When the radial pin block 4 moves, the resetting plate 13 on the side of the radial pin block 4 moves synchronously with the pin block, continuously compressing the resetting spring 14 in the resetting slot, and storing elastic potential energy for subsequent disassembly and resetting.

[0022] The radial pin 4 is provided with a beveled part 15 at the end away from the axial pin 5, and the beveled part 15 is located between the two guide rods 12. The radial pin 4 is provided with an axial groove 22 at the end near the axial pin 5. A sliding protrusion 16 is provided in the radial groove 9 along the axial direction of the connecting ring 10. A sliding protrusion 27 is provided at the end of the axial pin 5 near the radial pin 4. A sliding groove 18 is provided on the sliding protrusion 27 to be slidably connected with the sliding protrusion 16. When the radial pin 4 needs to be moved, the transmission bolt 23 is rotated to drive the transmission block 24 rotatably connected to it to move forward. The inclined surface 27 of the transmission block 24 gradually presses against the inclined surface 15 at the end of the radial pin 4. The axial feed force is converted into radial thrust through the inclined surface transmission, which pushes the radial pin 4 to slide along the radial direction of the connecting ring 10 toward the axis.

[0023] The plate 11 has several pressure blocks 39 on its side away from the pressure housing 1. These pressure blocks 39 are equidistantly arranged around the outer periphery of the plate 11, and each pressure block 39 corresponds to a locking mechanism. The axial pin 5 has a pressing inclined surface 19 at its end away from the radial pin 4. The pressure block 39 has a pressing inclined surface 20 that corresponds to and movably abuts against the pressing inclined surface 19. During the radial pin 4's feeding towards the axis, the axial pin 5, with its end in sliding engagement... They then move radially together until the axial pin 5 moves to the corresponding position of the pressure block 39 on the side of the plate 11. The pressing slope 19 at the end of the axial pin 5 and the pressure slope 20 on the surface of the pressure block 39 initially fit and abut against each other, completing the pre-locking installation of the entire air seal plate. The above pre-locking structure does not require precise alignment of the circumferential bolt holes. The axial positioning of the plate 11 and the connecting ring 10 can be completed by the feed of the radial pin 4, which greatly reduces the difficulty of alignment in a narrow space and helps to improve the efficiency of disassembly and assembly.

[0024] The axial slide groove 22 is symmetrically provided with two elastic plates 21. The two ends of the elastic plates 21 are respectively connected to the side of the sliding protrusion 17 near the pressure housing 1 and the side wall of the axial slide groove 22.

[0025] The transmission assembly includes a transmission bolt 23 and a transmission block 24. The transmission block 24 is provided with a second inclined surface 27 that corresponds to and movably abuts against the inclined surface 15. The transmission block 24 is provided with a rotating protrusion 25. The transmission bolt 23 extends along the connecting ring 10, with one end passing through the locking chamber 3 and extending into the radial groove 9, and rotatably connected to the rotating protrusion 25. The radial groove 9 is provided with a buffer groove 26 for the transmission block 24 to pass through, and the buffer groove 26 is located on the moving trajectory of the transmission block 24.

[0026] The transmission assembly also includes a second guide rod 29. Both sides of the rotating protrusion 25 are connected to guide protrusions 28. The second guide rod 29 is arranged along the axial direction of the connecting ring 10. There are two guide rods 29, which correspond to the two guide protrusions 28. One end of the second guide rod 29 is connected to the inner wall of the radial groove 9, and the other end passes through the corresponding guide protrusion 28 and is slidably connected to the guide protrusion 28.

[0027] The airtight chamber 6 is connected to the pressure housing 1 through a vent hole on the plate 11. The pushing assembly includes a pushing rod 30, a piston plate 31, a conical block 32, a telescopic spring 33, and a wedge block 34. The pushing rod 30 extends radially along the connecting ring 10, and one end of the pushing rod 30 penetrates the side wall of the airtight chamber 6 and is slidably connected to the side wall of the airtight chamber 6. Both ends of the pushing rod 30 are provided with spherical portions. The wedge block 34 is fixedly connected to the axial pin block 5 and has a... The piston plate 31 is slidably connected to the airtight chamber 6, and the conical block 32 is coaxially connected to the side of the piston plate 31 away from the pressure housing 1. The end of the push rod 30 away from the wedge block 34 abuts against the inclined side of the conical block 32. A spring plate 38 is connected to the rod body of the push rod 30 located inside the airtight chamber 6. A telescopic spring 33 is sleeved on the outside of the push rod 30, and the two ends of the telescopic spring 33 abut against the spring plate 38 and the inner wall of the airtight chamber 6, respectively.

[0028] The airtight chamber 6 is provided with a number of sliding rods 35, which are equidistantly arranged around the axis of the airtight chamber 6. Each sliding rod 35 passes through the piston plate 31 and is slidably connected to the piston plate 31. A sealing strip 36 is provided on the side wall of the piston plate 31, and the sealing strip 36 abuts against the inner wall of the airtight chamber 6.

[0029] like Figures 1-8 As shown, the usage process of the automotive turbocharger including the air seal plate assembly in this embodiment is as follows: During assembly, the plate 11 at the end of the intermediate housing 2 is first aligned coaxially with the connecting ring 10 at the end of the pressure housing 1. The plate 11 is pushed closer to the connecting ring 10. The annular snap-fit ​​protrusion 7 on the side of the plate 11 facing the pressure housing 1 is embedded into the snap-fit ​​groove on the end face of the connecting ring 10. The sealing ring 8 installed on the snap-fit ​​protrusion 7 enters the groove cavity synchronously with the snap-fit ​​protrusion 7 and comes into contact with the inner wall of the groove to form a preliminary axial sealing interface. After the preliminary alignment is completed, the transmission components of each locking mechanism are operated in sequence: rotating the transmission bolt 23 drives the transmission block 24 to move forward. The inclined surface 27 on the transmission block 24 gradually presses against the inclined surface 15 at the end of the radial pin 4, pushing the radial pin 4 to slide radially towards the axis along the connecting ring 10. During the sliding process, the guide hole at the end of the radial pin 4 slides along the guide rod 12 in the radial groove 9. At the same time, the reset plate 13 on the side of the radial pin 4 moves synchronously with the pin, continuously compressing the reset spring 14 in the reset groove.

[0030] During the feeding process of radial pin 4, the axial pin 5 with its sliding fit at the end moves accordingly until the axial pin 5 moves to the corresponding position of the pressure block 39 on the side of plate 11. The pressing slope 19 at the end of the axial pin 5 and the pressure slope 20 on the pressure block 39 initially fit and abut against each other, completing the pre-locking installation of the entire air seal plate.

[0031] After the turbocharger enters the working state, a high-pressure gas environment gradually forms inside the pressure housing 1. Some of the high-pressure gas flows into the airtight chamber 6 through the vent holes on the plate 11 and acts on the end face of the piston plate 31 inside the airtight chamber 6. As the gas pressure continues to rise, the gas thrust pushes the piston plate 31 to slide away from the pressure housing 1 along the sliding rod 35 inside the airtight chamber 6. The sealing strip 36 embedded in the side wall of the piston plate 31 moves synchronously with the piston, always maintaining the airtightness of the chambers on both sides of the piston and avoiding gas pressure leakage and loss. While the piston plate 31 moves, it drives the conical block 32 to advance synchronously. The inclined side of the conical block 32 gradually squeezes the spherical part at the end of the push rod 30, converting the axial gas pressure into radial thrust, pushing the push rod 30 to overcome the elastic force of the telescopic spring 33 and slide radially towards the axis along the connecting ring 10.

[0032] When the push rod 30 is fed toward the axis, the spherical part at its other end abuts against the arc-shaped surface of the wedge block 34, and the thrust is transmitted through the arc-shaped contact surface, pushing the wedge block 34 and the axial pin block 5 fixedly connected to the wedge block 34 to slide toward the pressure housing 1. During the sliding process of the axial pin block 5, the pressing inclined surface 19 at its end continues to slide relative to the pressing inclined surface 20 of the pressing block 39. With the help of the component force of the inclined surface, the radial thrust is converted into the axial clamping force, and the plate 11 is continuously pressed toward the pressure housing 1. After the plate 11 is clamped, it further drives the snap-fit ​​protrusion 7 to be squeezed into the snap-fit ​​groove, increasing the compression of the sealing ring 8, so that the clamping force of the sealing surface increases synchronously with the increase of the internal air pressure, forming a self-tightening effect where the higher the air pressure, the tighter the seal, which compensates for the attenuation of the sealing gap caused by vibration in real time and avoids the problem of seal failure after the traditional bolts loosen.

[0033] During the sliding process of the axial pin 5, the axial groove 22 at the end of the radial pin 4 cooperates with the sliding protrusion and sliding groove 18 on the side of the axial pin 5, limiting the axial pin 5 to slide back and forth along the axial direction only; the elastic plates 21 symmetrically arranged in the axial groove 22 are compressed synchronously with the movement of the axial pin 5. When the turbocharger stops and the internal air pressure is released, the elastic plate 21 releases elastic potential energy, driving the axial pin 5 to reset in the direction away from the pressure housing 1, releasing the axial clamping on the plate 11. At the same time, the telescopic spring 33 rebounds and drives the push rod 30 to retract, and the piston plate 31 gradually resets as the air pressure decreases, and the entire push assembly returns to its initial state.

[0034] During disassembly, rotating the transmission bolt 23 in the reverse direction causes the transmission block 24 to retract, releasing the pressure on the radial pin 4. The return spring 14, through the return plate 13, drives the radial pin 4 to retract, and the axial pin 5 moves out synchronously with the radial pin 4, completely disengaging from the pressure block 39. This allows the plate 11 to be directly separated from the connecting ring 10, completing the disassembly. The guide rod 29 and guide protrusion 28 in the transmission assembly cooperate to ensure the smooth movement of the transmission block 24.

[0035] The above embodiments are preferred embodiments of the present invention and are intended to explain the technical solutions of the present invention, rather than to limit the invention. Within the protection scope of the present invention, any equivalent modifications or substitutions can be made. The scope of the present invention is defined in the claims.

Claims

1. An air seal plate assembly, comprising a pressure housing (1) with a connecting ring (10) fixedly connected to one end and an intermediate housing (2) with a plate (11) coaxially connected to the end, characterized in that: It also includes several locking mechanisms equidistantly arranged around the connecting ring (10), each of which includes a locking chamber (3), a radial pin (4), an axial pin (5), a transmission assembly, an airtight chamber (6), and a pushing assembly: The plate (11) has a ring-shaped snap-fit ​​protrusion (7) for fitting a sealing ring (8) on the side near the pressure housing (1), and the connecting ring (10) has a snap-fit ​​groove on the side near the plate (11) for the sealing ring (8) to snap into. The locking chamber (3) is located on the side wall of the connecting ring (10), and a radial groove (9) for sliding of the radial pin block (4) is provided on the side of the connecting ring (10) near the axis. The transmission assembly is located on the locking chamber (3) and is used to drive the radial pin block (4) to move radially back and forth along the connecting ring (10). The axial pin (5) is slidably fitted to one end of the radial pin (4) near the axis of the connecting ring (10), and can slide back and forth along the axis of the connecting ring (10); The airtight chamber (6) is fixedly connected to the plate (11) and its interior is connected to the interior of the pressure housing (1). The pushing assembly is set on the airtight chamber (6). The high-pressure gas inside the pressure housing (1) can enter the airtight chamber (6) and drive the pushing end of the pushing assembly to squeeze the axial pin (5), so that the axial pin (5) moves along the connecting ring (10) toward one side of the pressure housing (1).

2. The gas seal plate assembly according to claim 1, characterized in that: Two guide rods (12) are symmetrically connected on the inner wall of the radial groove (9), and the guide rods (12) extend radially along the connecting ring (10). The radial pin block (4) is provided with a guide hole corresponding to the two guide rods (12) at one end of the radial pin block (5) along the connecting ring (10). The end of the guide rod (12) is slidably disposed in the corresponding guide hole.

3. The gas seal plate assembly according to claim 2, characterized in that: The locking chamber (3) has two radial grooves (9) symmetrically connected to the reset slots. Two reset plates (13) are fixedly connected to one side of the radial pin block (4), and the two reset plates (13) correspond one-to-one with the two reset slots. A reset spring (14) is provided between the side of the reset plate (13) near the axis of the connecting ring (10) and the reset slot.

4. The gas seal plate assembly according to claim 1, characterized in that: The radial pin (4) has a beveled portion (15) at one end away from the axial pin (5). The beveled portion (15) is located between the two guide rods (12). The radial pin (4) has an axial groove (22) at one end near the axial pin (5). A sliding protrusion (16) is provided in the radial groove (9) along the axial direction of the connecting ring (10). A sliding protrusion (27) is provided at one end of the axial pin (5) near the radial pin (4). The sliding protrusion (27) has a groove adapted to slide with the sliding protrusion (16). The sliding groove (18) of the moving connection; the plate (11) is provided with a number of pressure blocks (39) on the side plate away from the pressure shell (1), the number of pressure blocks (39) are equidistantly arranged around the outer periphery of the plate (11), and the number of pressure blocks (39) corresponds to the number of locking mechanisms one by one. The axial pin block (5) is provided with a pressing slope (19) at one end away from the radial pin block (4), and the pressure block (39) is provided with a pressing slope (20) corresponding to the pressing slope (19), and the pressing slope (20) and the pressing slope (19) are in movable contact.

5. The gas seal plate assembly according to claim 4, characterized in that: The axial groove (22) is symmetrically provided with two elastic plates (21). The two ends of the elastic plates (21) are respectively connected to the side of the sliding protrusion (17) near the pressure shell (1) and the side wall of the axial groove (22).

6. The gas seal plate assembly according to claim 1, characterized in that: The transmission assembly includes a transmission bolt (23) and a transmission block (24); the transmission block (24) is provided with a second inclined surface (27) that corresponds to and movably abuts the first inclined surface (15); the transmission block (24) is provided with a rotating protrusion (25); the transmission bolt (23) extends axially along the connecting ring (10), one end of which passes through the locking chamber (3) and extends into the radial groove (9), and is rotatably connected with the rotating protrusion (25); the inner wall of the radial groove (9) is provided with a buffer groove (26) for the transmission block (24) to pass through; the buffer groove (26) is located on the moving trajectory of the transmission block (24).

7. The gas seal plate assembly according to claim 6, characterized in that: The transmission assembly also includes two guide rods (29). Both sides of the rotating protrusion (25) are connected to guide protrusions (28). The guide rods (29) extend axially along the connecting ring (10). The two guide rods (29) correspond one-to-one with the two guide protrusions (28). One end of the guide rod (29) is connected to the inner wall of the radial groove (9), and the other end passes through the corresponding guide protrusion (28) and is slidably connected to the guide protrusion (28).

8. The gas seal plate assembly according to claim 1, characterized in that: The interior of the airtight chamber (6) is connected to the pressure shell (1) through a vent hole opened on the plate (11). The pushing assembly includes a pushing rod (30), a piston plate (31), a conical block (32), a telescopic spring (33), and a wedge block (34). The pushing rod (30) extends radially along the connecting ring (10). One end of the pushing rod (30) penetrates the side wall of the airtight chamber (6) and is slidably connected to the side wall of the airtight chamber (6). Both ends of the pushing rod (30) are provided with spherical parts. The wedge block (34) is fixedly connected to the axial pin block (5). The wedge block (34) is provided with an arc-shaped part. The arc-shaped part and the spherical part of the push rod (30) are in contact with each other. The piston plate (31) is slidably connected inside the airtight chamber (6). The conical block (32) is coaxially connected to the side of the piston plate (31) away from the pressure shell (1). The end of the push rod (30) away from the wedge block (34) is in contact with the inclined side of the conical block (32). The push rod (30) is connected to a spring plate (38) on the rod body inside the airtight chamber (6). The telescopic spring (33) is sleeved on the outside of the push rod (30). The two ends of the telescopic spring (33) are in contact with the spring plate (38) and the inner wall of the airtight chamber (6) respectively.

9. The gas seal plate assembly according to claim 1, characterized in that: Several sliding rods (35) are equidistantly arranged inside the airtight chamber (6). Each sliding rod (35) passes through the piston plate (31) and is slidably connected to the piston plate (31). A sealing strip (36) is provided on the side wall of the piston plate (31) to abut against the inner wall of the airtight chamber (6).

10. An automotive turbocharger, characterized in that, Includes the air seal plate assembly as described in any one of claims 1-9.

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