CN214698455U

CN214698455U - Thrust positioning structure of turbocharger shaft system

Info

Publication number: CN214698455U
Application number: CN202120559141.2U
Authority: CN
Inventors: 张华然; 李锋; 闫海东; 靳鹏; 李庆斌; 李文军; 官庆武; 曹刚
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: 2021-11-12
Anticipated expiration: 2031-03-18

Abstract

The utility model discloses a turbo charger shafting thrust location structure especially relates to turbo charger technical field, including the turbine rotor, the bearing body, integral bearing housing and impeller, integral bearing housing is installed at the internal portion of bearing, be provided with little retaining ring between integral bearing housing right-hand member and the internal portion of bearing, the turbine rotor is installed in integral bearing housing hole, the bearing body is all extended at both ends about the turbine rotor, the 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, little retaining ring is located the outside left side of seal cover, the oil blanket is installed on the outside right side of seal cover. The thrust positioning structure of the turbocharger shaft system saves a thrust pressing plate, reduces the cost, effectively increases the volume of a lubricating oil cavity of a bearing body, can improve the negative pressure resistance of the shaft system, is favorable for improving the reliability of a supercharger, and solves the problem that the conventional shaft system has lower negative pressure resistance.

Description

Thrust positioning structure of turbocharger shaft system

Technical Field

The utility model relates to a turbo charger technical field especially relates to turbo charger shafting thrust location structure.

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 large shaft 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 turbine rotor, the sealing sleeve is axially limited by 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 by a locking nut, one end surface of the integral bearing sleeve is abutted against a plane of a bearing body, a tiny 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 by a check ring, the turbine rotor, the impeller, the sealing sleeve and the locking nut form a rotating pair whole body in the working process of a supercharger, the two end surfaces of the integral bearing sleeve, the end surface of the shaft shoulder of the large shaft of the rotor and the end surface of the sealing sleeve bear the axial thrust force, and the structure has the problem of lower negative pressure resistance of the shafting, resulting in a less reliable supercharger.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to overcome prior art's defect, provide turbo charger shafting thrust location structure, solved the lower problem of the anti negative pressure ability of existing shafting at present.

The utility model provides a technical scheme that its technical problem adopted is: turbocharger shafting thrust location structure, including turbine rotor, bearing body, integral bearing housing and impeller, integral bearing housing is installed at the internal portion of bearing, be provided with little retaining ring between integral bearing housing right-hand member and 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 wheel installs on the outside right side of turbine rotor, turbine rotor is outside and be located and install the seal cover between impeller and the integral bearing housing, little retaining ring is located the outside left side of seal cover, the oil blanket lid is installed on the outside right side of seal cover, be equipped with big retaining ring between oil blanket 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 with the bearing body through a large retainer ring.

Preferably, the outer diameter of the right end of the integral bearing sleeve is larger than the inner diameter of the small retainer ring.

Compared with the prior art, the utility model discloses the beneficial effect who realizes: the thrust positioning structure of the turbocharger shaft system saves a thrust pressing plate, reduces the cost, effectively increases the volume of the bearing body lubricating oil cavity, can improve the negative pressure resistance of the shaft system, and is favorable for improving the reliability of a supercharger.

Drawings

FIG. 1 is a prior art overall schematic;

fig. 2 is an overall schematic view of the present invention.

In the figure: 1-a turbine rotor; 2-a bearing body; 3-integral bearing housing; 4-small retainer ring; 5-sealing sleeve; 6-oil sealing cover; 7-big retainer ring; 8-impeller; and 9-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 presented herein only to illustrate and explain the present invention, and not to limit the present invention.

As shown in fig. 1-2, the thrust positioning structure of a turbocharger shaft system comprises a turbine rotor 1, a bearing body 2, an integral bearing sleeve 3 and an impeller 8, wherein the integral bearing sleeve 3 is installed inside the bearing body 2, a small retainer ring 4 is arranged between the right end of the integral bearing sleeve 3 and the inside of the bearing body 2, the turbine rotor 1 is installed in a bore of the integral bearing sleeve 3, the bearing body 2 extends from the left end and the right end of the turbine rotor 1, the impeller 8 is installed on the right side of the outside of the turbine rotor 1, a seal sleeve 5 is installed outside the turbine rotor 1 and between the impeller 8 and the integral bearing sleeve 3, the small retainer ring 4 is located on the left side of the outside of the seal sleeve 5, an oil seal cover 6 is installed on the right side of the outside of the seal sleeve 5, a large retainer ring 7 is arranged between the right side of the oil seal cover 6 and the bearing body 2, and the left end of the impeller 8 is attached to the right end of the seal sleeve 5, the right side of the outside of the turbine rotor 1 is in threaded connection with a locking nut 9, the locking nut 9 is positioned on the right side of the impeller 8 and is tightly attached to the impeller 8, the oil sealing cover 6 is in press fit with the bearing body 2 through a large retainer ring 7, the outer diameter of the right end of the integral bearing sleeve 3 is larger than the inner diameter of a small retainer ring 4, the integral bearing sleeve 3 is installed in the bearing body 2 during installation, the axial moving distance is limited by the small retainer ring 4 installed on an inner groove of the bearing body 2 at the right end of the integral bearing sleeve 3, and the cost is reduced compared with that of an anti-thrust pressure plate through the small retainer ring 4;

the turbine rotor 1 is arranged in an inner hole of the integral bearing sleeve 3, the seal sleeve 5 is arranged on a shaft shoulder of a shaft lever in the turbine rotor 1 and is positioned by the shaft shoulder, an inner hole of the oil seal cover 6 is arranged on the seal sleeve 5, the excircle of the oil seal cover 6 is seated on the plane of the bearing body 2, the oil seal cover 6 is pressed on the bearing body 2 through a large retainer ring 7, the left end of an impeller 8 of the compressor is contacted with the right end of the seal sleeve 5, and then the left end of the impeller is pressed on the seal sleeve 5 through a locking nut 9;

in conclusion, the thrust pressing plate is omitted, the cost is reduced, the volume of the lubricating oil cavity in the bearing body 2 is effectively increased, the negative pressure resistance of the shaft system can be improved, and the reliability of the supercharger is improved.

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 modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. 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. Turbocharger shafting thrust location structure, including turbine rotor (1), bearing body (2), integral bearing housing (3) and impeller (8), its characterized in that:

the novel turbine bearing is characterized in that the integral bearing sleeve (3) is installed inside the bearing body (2), a small check ring (4) is arranged between the right end of the integral bearing sleeve (3) and the inside of 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 (8) is installed on the right side of the outside of the turbine rotor (1), the turbine rotor (1) is outside and is located between the impeller (8) and the integral bearing sleeve (3) to install the sealing sleeve (5), the small check ring (4) is located on the left side of the outside of the sealing sleeve (5), the oil sealing cover (6) is installed on the right side of the outside of the sealing sleeve (5), and a large check ring (7) is arranged between the right side of the oil sealing cover (6) and the bearing body (2).

2. The turbocharger shafting thrust positioning structure of claim 1, wherein: the left end of the impeller (8) is attached to the right end of the sealing sleeve (5).

3. The turbocharger shafting thrust positioning structure of claim 1, wherein: the right side of the outer part of the turbine rotor (1) is in threaded connection with a locking nut (9), and the locking nut (9) is located on the right side of the impeller (8) and is tightly attached to the impeller (8).

4. The turbocharger shafting thrust positioning structure of claim 1, wherein: and the oil seal cover (6) is pressed with the bearing body (2) through a large retainer ring (7).

5. The turbocharger shafting thrust positioning structure of claim 1, wherein: the outer diameter of the right end of the integral bearing sleeve (3) is larger than the inner diameter of the small retainer ring (4).