CN112855602A

CN112855602A - Oil seal cover structure with thrust function

Info

Publication number: CN112855602A
Application number: CN202110291420.XA
Authority: CN
Inventors: 张华然; 曹刚; 张涛; 李琳; 李锋; 刘朝晖; 潘航宇; 杨迪
Original assignee: Hunan Tianyan Machinery Co Ltd
Current assignee: Hunan Tianyan Machinery Co Ltd
Priority date: 2021-03-18
Filing date: 2021-03-18
Publication date: 2021-05-28

Abstract

The invention discloses an oil seal cover structure with an anti-thrust effect, and particularly relates to the technical field of turbochargers. This kind of oil seal cover structure with thrust effect, simple structure, simple to operate, the installation accuracy is high, and the thrust clamp plate has just been saved to this structure, just can realize the thrust through the oil seal cover, effectively the cost is reduced has increased the volume of bearing body lubricating oil cavity simultaneously, can promote the anti negative pressure ability of shafting, promotes the reliability of booster, has solved the current lower problem of anti negative pressure ability of existence shafting.

Description

Oil seal cover structure with thrust function

Technical Field

The invention relates to the technical field of turbochargers, in particular to an oil seal cover structure with an anti-thrust function.

Background

The turbocharger drives the air compressor to rotate by utilizing the energy of combustion waste gas, and the air compressor compresses air to improve the air inlet density, so that the combustion efficiency of the internal combustion engine is improved, and more work output is realized. The turbocharger is subjected to gas axial thrust from the gas compressor end and the gas turbine end simultaneously during the operation process, the axial force changes along with the change of the engine working condition, and therefore the turbocharger shaft system has to be designed with an axial thrust structure to bear the axial force.

The existing shafting thrust structure is that an integral bearing sleeve is arranged on a shaft lever of a turbine rotor, thrust surfaces are designed at two ends of the integral bearing sleeve, a sealing sleeve is arranged on a shaft shoulder of the shaft lever of the turbine rotor, the sealing sleeve is axially limited through the shaft shoulder, the back end surface of a wheel of a compressor impeller is contacted with one end surface of the sealing sleeve, the other end surface of the compressor impeller is pressed on the other end surface of the sealing sleeve through a locking nut, one end surface of the integral bearing sleeve is abutted against one side in a bearing body, a small gap is kept between the other end surface of the integral bearing sleeve and one end surface of a thrust pressing plate, the other end surface of the thrust pressing plate is contacted with the end surface of an oil sealing cover, the oil sealing cover is pressed through a check ring, so that the axial moving distance of the integral bearing is limited, in the working process of a supercharger, the turbine rotor, the impeller, the structure has the problem of low negative pressure resistance of the shafting, so that the reliability of the supercharger is low.

Disclosure of Invention

The invention aims to overcome the defects of the prior art, provides an oil seal cover structure with a thrust function, and solves the problem that the conventional shafting has low negative pressure resistance.

The technical scheme adopted by the invention for solving the technical problems is as follows: the utility model provides an oil seal cover structure with thrust effect, includes turbine rotor, bearing body, integral bearing housing and impeller, integral bearing housing is installed at the internal portion of bearing, turbine rotor installs in integral bearing housing hole, the bearing body all extends at both ends about turbine rotor, impeller mounting is on the outside right side of turbine rotor, the turbine rotor is outside and be located and install the seal cover between impeller and the integral bearing housing, seal cover externally mounted has the oil seal cover, oil seal cover left end and integral bearing housing right-hand member looks butt, be equipped with the retaining ring between oil seal cover right side and the bearing body.

Preferably, the left end of the impeller is attached to the right end of the sealing sleeve.

Preferably, the right side of the outer part of the turbine rotor is in threaded connection with a locking nut, and the locking nut is located on the right side of the impeller and is tightly attached to the impeller.

Preferably, the oil seal cover is pressed on the bearing body through the retainer ring.

Preferably, an annular boss is arranged on the inner side of the left end of the oil sealing cover, the annular boss is located outside the sealing sleeve, the left end of the annular boss is in contact with the right end of the integral bearing sleeve, and a notch is formed in the bottom of the left end of the annular boss.

Compared with the prior art, the invention has the following beneficial effects: this kind of oil seal cover structure with thrust effect, simple structure, simple to operate, the installation accuracy is high, and the thrust clamp plate has just been saved to this structure, just can realize the thrust through the oil seal cover, effectively the cost is reduced has increased the volume of bearing body lubricating oil cavity simultaneously, can promote the anti negative pressure ability of shafting, promotes the reliability of booster.

Drawings

FIG. 1 is a prior art overall schematic;

FIG. 2 is an overall schematic view of the present invention;

FIG. 3 is a schematic side view of the oil cap of the present invention;

FIG. 4 is a schematic cross-sectional view taken along line A-A of FIG. 3 according to the present invention.

In the figure: 1-a turbine rotor; 2-a bearing body; 3-integral bearing housing; 4-sealing sleeve; 5-sealing an oil cover; 6-a retainer ring; 7-an impeller; 8-locking the nut.

Detailed Description

The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.

As shown in fig. 1-4, an oil seal cover structure with thrust function comprises a turbine rotor 1, a bearing body 2, an integral bearing housing 3 and an impeller 7, wherein the integral bearing housing 3 is installed inside the bearing body 2, the turbine rotor 1 is installed in an inner hole of the integral bearing housing 3, the bearing body 2 extends from the left end and the right end of the turbine rotor 1, the impeller 7 is installed on the right side outside the turbine rotor 1, a seal housing 4 is installed outside the turbine rotor 1 and between the impeller 7 and the integral bearing housing 3, an oil seal cover 5 is installed outside the seal housing 4, the left end of the oil seal cover 5 is abutted against the right end of the integral bearing housing 3, a retainer ring 6 is arranged between the right side of the oil seal cover 5 and the bearing body 2, the left end of the impeller 7 is abutted against the right end of the seal housing 4, and a lock nut 8 is connected with the right side of the outside, the locking nut 8 is positioned at the right side of the impeller 7 and is tightly attached to the impeller 7, the oil sealing cover 5 is pressed with the bearing body 2 through the retaining ring 6, the inner side of the left end of the oil sealing cover 5 is provided with an annular boss, the annular boss is positioned outside the sealing sleeve 4, the left end of the annular boss is contacted with the right end of the integral bearing sleeve 3, the bottom of the left end of the annular boss is provided with a notch, when in installation, one end surface of the integral bearing sleeve 3 is seated against the plane of the bearing body 2, the integral bearing sleeve 3 is arranged in a bearing sleeve seating hole of the bearing body 2, the other end surface of the integral bearing sleeve 3 is limited through the end surface of the oil sealing cover 5, the turbine rotor 1 is arranged in an inner hole of the integral bearing sleeve 3, the sealing sleeve 4 is arranged on a shaft shoulder of a shaft lever in the turbine rotor 1 and is positioned by the shaft shoulder, the inner hole of, the oil seal cover 5 is pressed on the bearing body 2 through the retainer ring 6, the back end face of an impeller 7 of the gas compressor is contacted with the end face of the seal sleeve 4, and then the seal sleeve 4 is pressed through the locking nut 8, so that the end face of the integral bearing sleeve 3 and the end face of the oil seal cover 5 keep a tiny gap, and the oil seal cover 5 supports against the integral bearing sleeve 3 through an annular boss in the oil seal cover 5 to bear the axial force from a vortex end;

to sum up, this structure has saved the thrust clamp plate, and the cost is reduced has effectively increased the volume of lubricating oil cavity in the bearing body 2 moreover, can promote the anti negative pressure ability of shafting, is favorable to promoting the reliability of booster.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides an oil cap structure seals with thrust, includes turbine rotor (1), bearing body (2), integral bearing housing (3) and impeller (7), its characterized in that:

the turbine rotor structure is characterized in that the integral bearing sleeve (3) is installed inside the bearing body (2), the turbine rotor (1) is installed in an inner hole of the integral bearing sleeve (3), the bearing body (2) is extended from the left end and the right end of the turbine rotor (1), the impeller (7) is installed on the right side of the outer portion of the turbine rotor (1), the sealing sleeve (4) is installed on the outer portion of the turbine rotor (1) and located between the impeller (7) and the integral bearing sleeve (3), an oil sealing cover (5) is installed on the outer portion of the sealing sleeve (4), the left end of the oil sealing cover (5) is abutted to the right end of the integral bearing sleeve (3), and a check ring (6) is arranged between the right side of the oil sealing cover (5).

2. An oil seal cap structure with thrust action according to claim 1, wherein: the left end of the impeller (7) is attached to the right end of the sealing sleeve (4).

3. An oil seal cap structure with thrust action according to claim 1, wherein: the right side of the outer part of the turbine rotor (1) is in threaded connection with a locking nut (8), and the locking nut (8) is located on the right side of the impeller (7) and is tightly attached to the impeller (7).

4. An oil seal cap structure with thrust action according to claim 1, wherein: and the oil seal cover (5) is pressed with the bearing body (2) through the retainer ring (6).

5. An oil seal cap structure with thrust action according to claim 1, wherein: the oil seal structure is characterized in that an annular boss is arranged on the inner side of the left end of the oil seal cover (5), the annular boss is located outside the seal sleeve (4), the left end of the annular boss is in contact with the right end of the integral bearing sleeve (3), and a notch is formed in the bottom of the left end of the annular boss.