CN218030367U

CN218030367U - Engine oil leakage prevention structure of turbocharger

Info

Publication number: CN218030367U
Application number: CN202222380746.2U
Authority: CN
Inventors: 俞方俊; 王云飞; 沈怡东; 刁月红; 张人铨
Original assignee: Boma Technology Shanghai Co ltd
Current assignee: Boma Technology Shanghai Co ltd
Priority date: 2022-09-08
Filing date: 2022-09-08
Publication date: 2022-12-13
Anticipated expiration: 2032-09-08

Abstract

The utility model provides a turbo charger prevent machine oil leakage structure, includes the pivot, the cover is equipped with pinch roller, seal bush and gasket in proper order in the pivot, and seal bush's periphery is provided with annular partition plate, and the cover is equipped with midbody apron and footstep bearing respectively in annular partition plate's both sides on seal bush, the utility model discloses set up an annular boss at midbody apron, machine oil piles up in annular draining groove, and annular boss can block machine oil when machine oil trickles down naturally, reduces the machine oil volume that gets into between midbody apron and the seal bush, and then reduces the machine oil leakage at turbo charger compressor end. The utility model discloses set up a conical surface on seal bush's annular baffle, do not have the contact between the edge of annular boss and the extension line of the conical surface, have certain clearance, guarantee under the normal operating mode that the machine oil that throws away from the conical surface can not blockked by the annular boss of midbody apron, but get into annular draining inslot, the machine oil leakage at turbo charger compressor end under special engine operating mode is improved.

Description

Engine oil leakage prevention structure of turbocharger

Technical Field

The utility model relates to the field of machinary, especially, relate to turbo charger, especially a turbo charger prevent machine oil leakage structure.

Background

A turbocharger is an air compressor that increases the amount of intake air by compressing air. The turbocharger utilizes the inertia impulsive 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 and feeds the air sent by an air filter pipeline to enable the air to be pressurized and enter a cylinder. In the prior art, a sealing structure of a turbocharger comprises a pressure wheel, an intermediate cover plate, a sealing bushing and a thrust bearing, and under partial engine working conditions, engine oil entering from the thrust bearing easily enters a gap between the sealing bushing and the intermediate cover plate, so that the engine oil is leaked to the pressure wheel at the compressor end of the turbocharger.

Disclosure of Invention

An object of the utility model is to provide a turbo charger prevent that machine oil leaks structure, this kind of turbo charger prevent that machine oil leaks the technical problem of the pinch roller department at turbo charger compressor end easily to the machine oil among the turbo charger of solving prior art.

The utility model discloses a turbo charger prevent machine oil leakage structure, which comprises a rotating shaft, it is equipped with the pinch roller to overlap in proper order along the axial in the pivot, seal bush and gasket, seal bush's periphery is provided with annular baffle, the cover is equipped with midbody apron and footstep bearing respectively in annular baffle's both sides on seal bush, one side of pinch roller is equipped with the midbody shell on the midbody apron, the side of midbody shell is provided with the inlet port, be provided with the machine oil route in the footstep bearing, the one end setting of machine oil route is at footstep bearing's terminal surface and with the inlet port intercommunication, the other end of machine oil route extends to footstep bearing's interior circumference, be provided with annular draining groove in the terminal surface of midbody apron of annular draining groove, be provided with annular boss on the terminal surface of the inboard midbody apron of annular draining groove, cooperate with annular baffle's the outer circumference in the global circle of annular boss, annular baffle's terminal surface sets up to the conical surface, be provided with the clearance and extend to in annular draining groove between the extension line of conical surface in annular baffle's axial cross-section.

Furthermore, a sealing ring is arranged between the intermediate cover plate and the sealing bush.

Compared with the prior art, the utility model, its effect is positive and obvious. The utility model discloses set up an annular boss at the midbody apron, machine oil piles up in annular draining groove, and annular boss can block machine oil when machine oil trickles down naturally, reduces the machine oil volume that gets into between midbody apron and the sealing bush, and then reduces the machine oil leakage at turbo charger compressor end. The utility model discloses set up a conical surface on seal bush's annular baffle, do not have the contact between the edge of annular boss and the extension line of the conical surface, have certain clearance, guarantee under the normal operating mode that the machine oil that throws away from the conical surface can not blockked by the annular boss of midbody apron, but get into annular draining inslot, the machine oil leakage at turbo charger compressor end under special engine operating mode is improved.

Drawings

Fig. 1 is a schematic cross-sectional view of an oil leakage prevention structure of a turbocharger of the present invention.

Fig. 2 is a partially enlarged schematic view of fig. 1.

Fig. 3 is a schematic side view of the oil leakage preventing structure of the turbocharger of the present invention.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and embodiments, but the present invention is not limited to this embodiment, and the protection scope of the present invention should be included in all similar structures and similar variations thereof. The utility model provides an upper and lower, preceding, back, left and right equidirectional use only for the description convenience, it is not right the technical scheme's of the utility model restriction.

As shown in fig. 1-3, the utility model discloses a turbocharger prevent machine oil leakage structure, which comprises a rotating shaft 1, the cover is equipped with pinch roller 2 along the axial in proper order in pivot 1, sealing bush 3 and gasket 4, sealing bush 3's periphery is provided with annular baffle 5, the cover is equipped with intermediate cover plate 6 and footstep bearing 7 respectively in the both sides of annular baffle 5 on sealing bush 3, one side of pinch roller 2 is equipped with intermediate shell 9 on intermediate cover plate 6 cover, the side of intermediate shell 9 is provided with inlet port 10, be provided with oil passageway 11 in the footstep bearing 7, the one end of oil passageway 11 sets up at footstep bearing 7's terminal surface and communicates with inlet port 10, the other end of oil passageway 11 extends to the global inner circle of footstep bearing 7, be provided with annular draining groove 12 in the terminal surface of intermediate cover plate 6, be provided with annular boss 13 on the terminal surface of the inboard intermediate cover plate 6 of annular draining groove 12, the inner circle global of annular boss 13 matches with the outer periphery of annular baffle 5, the terminal surface of annular baffle 5 sets up to conical surface 14, set up to the conical surface 14 in the axial cross-section of annular baffle 5 between conical surface 15 and the annular boss 13 extension line of conical surface and extend to in annular draining groove 12 in the annular extension line.

Further, a sealing ring 8 is arranged between the intermediate cover plate 6 and the sealing bush 3.

Specifically, the rotating shaft 1, the pressing wheel 2, the sealing bushing 3, the gasket 4, the thrust bearing 7, and the like in this embodiment all adopt known solutions in the prior art, which are known to those skilled in the art and are not described herein again.

The working principle of the embodiment is as follows:

when the oil-retaining device works, engine oil enters from the oil inlet hole 10 of the middle shell 9 and then enters the thrust bearing 7 through the engine oil passage 11, and oil films are formed under the high-speed motion of the rotating shaft 1 and attached to two sides of the thrust bearing 7 to provide axial supporting force for the rotating shaft 1. The redundant engine oil is thrown into the annular oil drainage groove 12 of the intermediate cover plate 6 through the rotating action of the sealing bush 3, so that the engine oil is prevented from being accumulated too much and leaking to the pinch roller 2 of the turbocharger through the sealing ring 8 under partial working conditions.

The utility model discloses simple structure, easy manufacturing, the utility model discloses set up an annular boss 13 at midbody apron 6, machine oil is piled up in annular draining groove 12, and annular boss 13 can block machine oil when machine oil trickles down naturally, reduces the machine oil volume that gets into between midbody apron 6 and the sealing bush 3, and then reduces the machine oil leakage at turbo charger compressor end. The utility model discloses set up a conical surface 14 on seal bush 3's annular baffle 5, do not have the contact between the edge of annular boss 13 and conical surface 14's the extension line 15, have certain clearance, guarantee that the machine oil that throws away from conical surface 14 under the normal operating mode can not blockked by the annular boss 13 of midbody apron 6, but get into annular draining groove 12 in, the machine oil leakage at turbocharger compressor end under special engine operating mode is improved.

Claims

1. The utility model provides a turbo charger prevent machine oil leakage structure, includes the pivot, overlaps in proper order along the axial in the pivot to be equipped with pinch roller, sealed bush and gasket, its characterized in that: the periphery of a sealing bush is provided with an annular partition plate, two sides of the annular partition plate on the sealing bush are respectively sleeved with an intermediate cover plate and a thrust bearing, one side of a pressing wheel is sleeved with an intermediate shell on the intermediate cover plate, the side face of the intermediate shell is provided with an oil inlet hole, an engine oil passage is arranged in the thrust bearing, one end of the engine oil passage is arranged on the end face of the thrust bearing and communicated with the oil inlet hole, the other end of the engine oil passage extends to the inner circumferential face of the thrust bearing, an annular oil drainage groove is arranged in the end face of the intermediate cover plate, an annular boss is arranged on the end face of the intermediate cover plate on the inner side of the annular oil drainage groove, the inner circumferential face of the annular boss is matched with the outer circumferential face of the annular partition plate, the end face of the annular partition plate is set to be a conical face, and a gap is arranged between the extension line of the conical face and the annular boss in the axial cross section of the annular partition plate and extends into the annular oil drainage groove.

2. The oil leakage prevention structure of a turbocharger according to claim 1, characterized in that: and a sealing ring is arranged between the intermediate cover plate and the sealing bush.