CN210564674U

CN210564674U - Vortex end sealing structure for turbocharger

Info

Publication number: CN210564674U
Application number: CN201921785182.2U
Authority: CN
Inventors: 佘勉
Original assignee: Wuxi Spepelier Technology Co Ltd
Current assignee: Wuxi Spepelier Technology Co Ltd
Priority date: 2019-10-23
Filing date: 2019-10-23
Publication date: 2020-05-19
Anticipated expiration: 2029-10-23

Abstract

The utility model provides a whirlpool end seal structure for turbocharger belongs to the turbo charger field, the utility model provides a whirlpool end seal structure for turbo charger, the annular structure that sets up on the turbine shaft body has been cancelled, through backstop annular clearance fit on whirlpool end sealing ring and the midbody, make the whirlpool end sealing ring assemble into the midbody in advance, then, pack the turbine shaft body into the midbody again, for traditional turbo charger whirlpool end seal structure, the advantage of assembly facility has, and assembly process has detectability, the deformation and the damaged condition of direct observation sealing ring, the operation is simple, the spoilage of sealing ring assembling process has been reduced, lower cost and higher assembly efficiency have again simultaneously, help solving the problem that the booster life that leads to because of the sealing ring assembly inefficacy shortens.

Description

Vortex end sealing structure for turbocharger

Technical Field

The utility model relates to a turbo charger field especially relates to a vortex end seal structure for turbo charger.

Background

The turbocharger is an air compressor, which utilizes the inertia force of the exhaust gas discharged by the engine to push a turbine in a turbine chamber, the turbine drives a coaxial impeller, and the impeller pumps the air sent by a pipeline of an air filter to pressurize the air to enter an air cylinder, thereby realizing the improvement of the output power of the engine.

The transmission of the impeller driven by the turbine is carried out by depending on the turbine shaft, in order to enhance the reliability of long-term work of the turbine shaft, an intermediate body is arranged on a worm rod of the turbine shaft, and lubricating oil is used in the intermediate body to reduce the friction force when the turbine shaft is used for transmission. In order to prevent oil leakage, a turbine end sealing ring is assembled between the intermediate body and the rod body of the turbine shaft close to the turbine end to seal oil. For the vortex-end sealing ring structure (refer to fig. 1) in the prior art, the assembly method is generally adopted, namely, firstly, the relaxed sealing ring 02 is moved to a ring groove 011 formed on a turbine shaft 01, then, an intermediate body 03 is clamped on the turbine shaft 01, and meanwhile, the sealing ring 02 above the ring groove 011 is pressed into the intermediate body 03 to realize sealing. The problems with this seal structure are: on one hand, the sealing ring is difficult to be clamped into the intermediate body during assembly; on the other hand, even if the sealing ring is clamped into the intermediate body, the intermediate body is fixed on the turbine shaft, and then the sealing ring is easily deformed and damaged, so that resistance is brought to the rotation of the rotor. Therefore, the problems of low assembly efficiency, low reliability of the sealing ring, incapability of detecting the assembly process and the like are caused, and the quality of product assembly cannot be guaranteed.

SUMMERY OF THE UTILITY MODEL

To the problem that exists, the utility model provides a turbo charger is with whirlpool end seal structure for the turbo charger among the prior art, simplified the assembly structure complexity, have comparatively simple structure and stronger reliability.

The utility model discloses the technical scheme who takes does:

the utility model provides a turbine end sealing structure for a turbocharger, which comprises a turbine shaft body for driving the coaxial transmission of an impeller, an intermediate body for lubricating the turbine shaft body and a turbine end sealing ring for sealing; the turbine shaft body is horizontally arranged and comprises a turbine and a worm, and the worm is coaxially arranged on the right end surface of the turbine; the scroll rod comprises a stepped shaft and an intermediate mounting shaft which are coaxially arranged in sequence from left to right;

the intermediate mounting shaft is cylindrical; the right end face of the rightmost stepped stage of the stepped shaft and the left end face of the intermediate mounting shaft are integrally formed and fixed; a first step platform and a second step platform are arranged on the step shaft; the second step platform is fixedly connected to the left end surface of the first step platform in an abutting mode; the diameter of the second step is larger than that of the first step; the outer diameters of the rod bodies of the scroll rods positioned at the right end of the first step platform are smaller than or equal to the diameter of the first step platform; the intermediate body is detachably sleeved and fixed on the intermediate body mounting shaft; a stop ring groove for embedding the vortex end sealing ring is formed in the opening part of the left end face of the intermediate body; the outer wall of the vortex end sealing ring is embedded with the inner wall of the stop ring groove in a clearance mode, and the outer wall face of the first step platform is tightly attached to the inner wall of the vortex end sealing ring.

The utility model provides a turbo charger is with whirlpool end seal structure, preferably, the left port portion of midbody still is provided with annular backstop circle; the left end surface of the stop ring is adjacently fixed on the right end surface of the stop ring groove; the inner diameter of the stop ring is smaller than the diameter of the inner wall of the stop ring groove; the inner diameter of the stop ring is larger than the diameter of the first step platform, and the left end face of the stop ring is attached to the side wall of the vortex end sealing ring.

The utility model provides a turbo charger is with whirlpool end seal structure, preferably, the left end oral area of midbody still is provided with from the upper left chamfer portion that inclines to the lower right direction; the right end face of the chamfered part is smoothly fixed on the left end face of the stop ring groove.

The utility model provides a turbo charger is with whirlpool end seal structure, preferably, chamfer is the round platform form.

The utility model provides a turbo charger is with whirlpool end seal structure, preferably, whirlpool end sealing ring outer wall surface is provided with circular-arc recess, just circular-arc recess will the ring body outer wall of whirlpool end sealing ring is equallyd divide into two parts.

The utility model provides a turbo charger is with whirlpool end seal structure, preferably, be provided with the tooth's socket of mutually supporting respectively on intermediate body and the step shaft; the intermediate body is in sealing fit with the stepped shaft labyrinth.

The utility model provides a turbo charger is with whirlpool end seal structure, preferably, the midbody has seted up the bearing through-hole along horizontal central line; an engine oil inlet and an engine oil outlet which are communicated with an external engine oil pipeline are formed in the outer wall of the intermediate body; a bearing piece is arranged at the joint of the intermediate body and the intermediate body mounting shaft, and is arranged in the bearing through hole and sleeved on the intermediate body mounting shaft; an engine oil channel is formed in the bearing piece, and the engine oil inlet is communicated with the engine oil outlet through the engine oil channel.

The utility model provides a turbo charger is with whirlpool end seal structure, preferably, the bearing spare is ball bearing.

The technical scheme has the following advantages or beneficial effects:

the utility model provides a vortex end seal structure for turbo charger, the annular structure that sets up on the turbine shaft body has been cancelled, backstop annular clearance fit on through vortex end sealing ring and midbody, make vortex end sealing ring can assemble into the midbody in advance, then, pack turbine shaft body into the midbody again, for traditional turbo charger vortex end seal structure, the advantage of assembly facility has, and assembling process has detectability, can directly observe the deformation and the damaged condition of sealing ring, and the operation is thus simple, the spoilage of sealing ring assembling process has been reduced, lower cost and higher assembly efficiency have again simultaneously, help solving the problem that the booster life that leads to shortens after becoming invalid because of the sealing ring assembly.

Drawings

The invention and its features, aspects and advantages will become more apparent from a reading of the following detailed description of non-limiting embodiments with reference to the attached drawings. Like reference symbols in the various drawings indicate like elements. The drawings are not intended to be drawn to scale, emphasis instead being placed upon illustrating the principles of the invention.

FIG. 1 is an enlarged partial schematic view of a prior art turbocharger scroll tip seal arrangement in partial cross-section;

fig. 2 is a schematic view of a section structure of a supercharger assembly adopting a vortex end sealing structure provided in embodiment 1 of the present invention;

fig. 3 is a partially enlarged schematic view of a vortex end sealing structure provided in embodiment 1 of the present invention during an assembling process;

fig. 4 is a partially enlarged schematic view of the vortex end sealing structure provided in embodiment 1 of the present invention after the assembly is completed.

Detailed Description

The present invention will be further described with reference to specific examples, but the present invention is not limited thereto.

Example 1:

as shown in fig. 1, in view of the problems of assembly difficulty, easy deformation and damage, and incapability of observing the assembly state of the vortex end sealing structure for the turbocharger in the prior art, embodiment 1 of the present invention provides a vortex end sealing structure for the turbocharger, referring to fig. 2, including a turbine shaft body for driving the coaxial transmission of the impeller 7 (disposed on the impeller mounting shaft 123 of the scroll 12), an intermediate 3 for lubricating the turbine shaft body, and a vortex end sealing ring 2 for sealing;

the turbine shaft body is horizontally arranged and comprises a turbine 11 and a worm 12, and the worm 12 is coaxially arranged on the right end surface of the turbine 11; the scroll 12 comprises a stepped shaft 121 and an intermediate mounting shaft 122 which are coaxially arranged in sequence along the left direction and the right direction;

the intermediate mounting shaft 122 is cylindrical; the right end face of the rightmost stepped stage of the stepped shaft 121 and the left end face of the intermediate mounting shaft 122 are integrally formed and fixed; a first step 1211 and a second step 1212 are arranged on the stepped shaft 121; the second step 1212 is fixedly connected to the left end surface of the first step 1211; the diameter of the second step 1212 is larger than the diameter of the first step 1211; the outer diameters of the scroll bars 12 at the right end of the first step 1211 are all less than or equal to the diameter of the first step 1211; the intermediate body 3 is detachably sleeved and fixed on the intermediate body mounting shaft 122; a stop ring groove 31 for embedding the vortex end sealing ring 2 is formed in the opening part of the left end face of the intermediate body 3; the outer wall of the vortex end sealing ring 2 is in clearance fit with the inner wall of the stop ring groove 31, and the outer wall surface of the first step 1211 is tightly attached to the inner wall of the vortex end sealing ring 2.

Through the utility model discloses embodiment 1 provides an above-mentioned vortex end seal structure for turbo charger, the diameter of first step 1211 through setting up step shaft 121 is less than the diameter of second step 1212, and is located first step 1211 right-hand member the body of rod external diameter of scroll 12 all less than or equal to first step 1211's diameter for the diameter of intermediate installation axle 122, impeller installation axle 123's the equal less than or equal to first step 1211 has cancelled the annular of processing on the traditional turbine shaft through this structure, and the external diameter of scroll 12 is by first step 1211 right degressive or unchangeable in proper order, provides convenient structure for turbine shaft body 1 packs into intermediate 3 into. Meanwhile, the outer wall of the vortex end sealing ring 2 is embedded with the inner wall of the stop ring groove 31 in a clearance mode, the outer wall surface of the first step 1211 is tightly attached to the inner wall of the vortex end sealing ring 2, and the assembly mode of the vortex end sealing ring 2 is improved. The embodiment 1 provides a whirlpool end seal structure when the assembly, because the shoulder shaft of this structure does not have the annular, need not to embolia the sealing ring in the ring groove position of turbine shaft earlier, make the sealing ring shrink downwards and go into in the hole of midbody again, and can make whirlpool end sealing ring 2 assemble in the backstop annular 31 of midbody 3 with the left port portion clearance fit of midbody 3 independently in advance, (when assembling whirlpool end sealing ring 2 into midbody 3, can utilize the instrument to push whirlpool end sealing ring 2 to backstop annular 31), then, slowly push into midbody 3 and whirlpool end sealing ring 2 with the right-hand member of turbine shaft body and carry out the built-up fitting. In the process, a complex assembly link is not needed, the turbine shaft body is only required to be directly pushed into the opening of the left end face of the intermediate body 3, the deformation and damage conditions of the vortex end sealing ring 2 can be visually checked, the operation is simple and convenient, the detectability of the assembly process of the vortex end sealing ring 2 is ensured, the damage rate caused by the assembly of the sealing ring is reduced, the assembly efficiency and the assembly cost are high, the assembly quality of a product is improved from the start of the assembly process.

The embodiment 1 of the utility model provides an above-mentioned turbo charger is with whirlpool end seal structure, whirlpool end sealing ring 2's outer wall and the interior wall clearance gomphosis of the ring groove of stopping of midbody 3 can realize whirlpool end sealing ring 2 and midbody 3's fast assembly in advance. In order to further improve the sealing performance and the position stability of the vortex end sealing ring 2 in the intermediate body 3, and prevent the vortex end sealing ring 2 from deforming or deviating in the stop ring groove 31 of the intermediate body 3 when the turbine shaft body 1 is pushed in, which affects the long-term service life of the sealing ring, preferably, referring to fig. 3, the left end opening portion of the intermediate body 3 is further provided with an annular stop ring 32; the left end surface of the stop ring 32 is adjacently fixed on the right end surface of the stop ring groove 31; the inner diameter of the stop ring 32 is smaller than the inner wall diameter of the stop ring groove 31; the inner diameter of the stop ring 32 is larger than the diameter of the first step 1211, and the left end surface of the stop ring 32 is attached to the side wall of the vortex-end sealing ring 2.

A stopper ring groove 31 is opened in a left end face mouth portion of the intermediate body 3, and a stopper ring 32 is provided adjacent to a right end face of the stopper ring groove 31, so that a side wall peripheral portion of the scroll end seal ring 2 can be restricted in the axial direction by the stopper ring 32 after the scroll end seal ring 2 is pushed into the stopper ring groove 31 of the intermediate body 3 by a tool. Because the outer wall of vortex end sealing ring 2 and the interior wall clearance gomphosis of the backstop annular 31 of midbody 3, the left end face of ending the ring 32 can further laminate with the lateral wall of vortex end sealing ring 2, can enough prevent the position drunkenness that vortex end sealing ring 2 takes place in getting into midbody 3, also can protect the stability of seal structure when the booster work better, can further prevent the deformation of sealing ring. Meanwhile, the inner diameter of the stopper ring 32 is larger than the diameter of the first step 1211, so that position conflict and interference caused when the intermediate body 3 is assembled with the first step 1211 are avoided, and the reliability and the efficiency of assembling the vortex end sealing structure are improved.

Referring to fig. 3, in order to facilitate the tip seal ring 2 to be pre-assembled into the intermediate body 3 more efficiently, the left end opening of the intermediate body 3 is preferably further provided with a chamfered portion 33 inclined from the upper left to the lower right; the right end surface of the chamfered portion 33 is smoothly fixed to the left end surface of the stopper ring groove 31. Through setting up chamfer 33, the assembly of being convenient for on the one hand can play the guide effect for the accessory installation in the midbody 3, can get rid of the burr of midbody 3 left end face assembly mouth portion simultaneously, and can avoid stress concentration. To the structure and the form of chamfer 33, the utility model discloses embodiment 1 is not limited to specific form, as a preferred implementation scheme, can set up chamfer 33 to the round platform form, is convenient for on the one hand designing and processing, has lower cost, also is convenient for adopt the toper instrument to push vortex end sealing ring 2 to backstop annular 31 simultaneously, is difficult for producing wearing and tearing to vortex end sealing ring 2's structure when the assembly.

Preferably, in order to further strengthen the utility model discloses turbo charger is with whirlpool end seal structure's sealing performance, whirlpool end sealing ring 2 outer wall surface is provided with circular-arc recess, just circular-arc recess will whirlpool end sealing ring 2's ring body outer wall is equallyd divide into two parts. Therefore, the effect of the double sealing rings can be realized by arranging the arc-shaped groove, the structure is compact, and the capability of preventing engine oil leakage can be enhanced.

Further, in order to facilitate the assembly of the vortex end sealing ring 2 and enhance the sealing performance of the integral vortex end sealing structure, it is preferable that the intermediate body 3 and the stepped shaft 12 are respectively provided with mutually matched tooth grooves; the intermediate body 3 is in labyrinth seal fit with the stepped shaft 12. The labyrinth seal is that several ring seal teeth are arranged around the rotating shaft, between the teeth a throttling gap and an expansion cavity are formed, and the sealed medium can produce throttling effect when passing through the gap of the zigzag labyrinth so as to attain the goal of resisting leakage. The intermediate 3 and the stepped shaft 12 are further sealed in a non-contact manner by adopting a labyrinth seal mode, so that solid-phase friction does not exist, lubrication is not needed, the integral vortex end sealing structure is more suitable for high-temperature, high-pressure and high-speed running occasions of the supercharger, and meanwhile, the labyrinth seal is reliable in work, convenient to maintain and compact in structure.

Further, considering that the turbine end sealing ring 2 is assembled with the turbine shaft body and the intermediate body 3, the turbine lag is smaller when the turbine shaft rotates, and the turbine response is optimized, referring to fig. 2, a bearing through hole is formed in the intermediate body 3 along the horizontal center line; an engine oil inlet 34 and an engine oil outlet 35 which are communicated with an external engine oil pipeline are formed in the outer wall of the intermediate body 3; a bearing piece 4 is arranged at the joint of the intermediate body 3 and the intermediate body mounting shaft 122, and the bearing piece 4 is arranged in the bearing through hole and sleeved on the intermediate body mounting shaft 122; an engine oil passage is formed in the bearing piece 4, and the engine oil inlet 34 is communicated with the engine oil outlet 35 through the engine oil passage. By arranging the bearing piece 4, and the engine oil channel of the bearing piece 4 is communicated with the engine oil inlet 34 and the engine oil outlet 35 of the intermediate body 3, the friction force in the transmission process of driving the impeller by the turbine can be reduced, the transmission efficiency of mechanical power is improved, and lubricating oil continuously circulates in the cavity of the intermediate body through the engine oil channel, enters from the engine oil inlet 34 and flows out from the engine oil outlet 35, so that heat in the transmission process of the turbine shaft can be circularly taken away, and the working performance of the turbocharger can be ensured for a long time. Preferably, the bearing piece 4 is a ball bearing, the ball bearing is stable in dynamic control of rotation of the turbine shaft body 1, requirements on oil pressure and quality are relatively reduced, and the service life of the turbine can be further prolonged indirectly.

Those skilled in the art will appreciate that variations may be implemented by those skilled in the art in combination with the prior art and the above-described embodiments, and will not be described in detail herein. Such variations do not affect the essence of the present invention, and are not described herein.

The above description is directed to the preferred embodiment of the present invention. It is to be understood that the invention is not limited to the particular embodiments described above, and that devices and structures not described in detail are understood to be implemented in a manner common in the art; the person skilled in the art, without affecting the essence of the invention, may make numerous possible variations and modifications, or may modify the equivalent embodiments, without departing from the technical solution of the invention. Therefore, any simple modification, equivalent change and modification made to the above embodiments by the technical entity of the present invention all still fall within the protection scope of the technical solution of the present invention, where the technical entity does not depart from the content of the technical solution of the present invention.

Claims

1. A turbine end sealing structure for a turbocharger is characterized by comprising a turbine shaft body for driving an impeller to coaxially drive, an intermediate body for lubricating the turbine shaft body and a turbine end sealing ring for sealing; the turbine shaft body is horizontally arranged and comprises a turbine and a worm, and the worm is coaxially arranged on the right end surface of the turbine; the scroll rod comprises a stepped shaft and an intermediate mounting shaft which are coaxially arranged in sequence from left to right;

2. The scroll end sealing structure for a turbocharger according to claim 1, wherein the left port portion of the intermediate body is further provided with an annular stopper ring; the left end surface of the stop ring is adjacently fixed on the right end surface of the stop ring groove; the inner diameter of the stop ring is smaller than the diameter of the inner wall of the stop ring groove; the inner diameter of the stop ring is larger than the diameter of the first step platform, and the left end face of the stop ring is attached to the side wall of the vortex end sealing ring.

3. The scroll end sealing structure for a turbocharger according to claim 2, wherein the left port portion of the intermediate body is further provided with a chamfered portion inclined from the upper left to the lower right; the right end face of the chamfered part is smoothly fixed on the left end face of the stop ring groove.

4. The tip seal structure for a turbocharger according to claim 3, wherein said chamfered portion is in the form of a truncated cone.

5. The scroll end sealing structure for a turbocharger according to claim 4, wherein the outer wall surface of said scroll end seal ring is provided with a circular arc-shaped groove, and said circular arc-shaped groove divides the outer wall of the ring body of said scroll end seal ring into two parts.

6. The scroll end sealing structure for the turbocharger according to any one of claims 1 to 5, wherein the intermediate body and the stepped shaft are respectively provided with mutually matched tooth grooves; the intermediate body is in sealing fit with the stepped shaft labyrinth.

7. The scroll end sealing structure for a turbocharger according to claim 6, wherein the intermediate body is provided with a bearing through hole along a horizontal center line; an engine oil inlet and an engine oil outlet which are communicated with an external engine oil pipeline are formed in the outer wall of the intermediate body; a bearing piece is arranged at the joint of the intermediate body and the intermediate body mounting shaft, and is arranged in the bearing through hole and sleeved on the intermediate body mounting shaft; an engine oil channel is formed in the bearing piece, and the engine oil inlet is communicated with the engine oil outlet through the engine oil channel.

8. The scroll end sealing structure for a turbocharger according to claim 7, wherein said bearing member is a ball bearing.