阅读说明：本技术 一种降低漏油的涡轮转轴结构 (Turbine rotating shaft structure capable of reducing oil leakage ) 是由 佟鼎 何海龙 邢卫东 刘欣源 刘莹 杨磊 王翠翠 于 2019-10-14 设计创作，主要内容包括：本发明提供了一种降低漏油的涡轮转轴结构,属于废气涡轮增加技术领域,包括涡轮转轴、挡油台和甩油槽,涡轮转轴上套设有涡端轴承和涡轮密封环槽,挡油台设置在涡端轴承和涡轮密封环槽之间,密封环槽设置在挡油台上表面外沿处,且旋向与涡轮旋转方向保持一致,当涡轮增压器工作、涡轮转动时,轴承处润滑油会流向涡轮轮头,润滑油流至挡油台时,本发明随涡轮转动的甩油槽可以将润滑油甩至轴承体内回油腔,避免润滑油流至涡轮密封环槽或涡轮轮头,从而有效降低涡轮端的漏油情况。(The invention provides a turbine rotating shaft structure for reducing oil leakage, which belongs to the technical field of waste gas turbine increase and comprises a turbine rotating shaft, an oil baffle table and an oil throwing groove, wherein a turbine end bearing and a turbine sealing ring groove are sleeved on the turbine rotating shaft, the oil baffle table is arranged between the turbine end bearing and the turbine sealing ring groove, the sealing ring groove is arranged at the outer edge of the upper surface of the oil baffle table, the rotating direction of the sealing ring groove is consistent with the rotating direction of a turbine, when a turbocharger works and the turbine rotates, lubricating oil at the bearing can flow to a turbine wheel head, and when the lubricating oil flows to the oil baffle table, the oil throwing groove rotating along with the turbine can throw the lubricating oil to an oil return cavity in a bearing body, so that the lubricating oil is prevented from flowing to the turbine sealing ring groove or the turbine wheel head, and the oil leakage condition of.)

1. The utility model provides a reduce turbine pivot structure of oil leak which characterized in that: including turbine pivot (1), fender oil platform (2) and get rid of oil groove (3), be equipped with whirlpool end bearing and turbine seal ring groove on turbine pivot (1), keep off oil platform (2) and set up between whirlpool end bearing and turbine seal ring groove, get rid of oil groove (3) and set up in keeping off oil platform (2) upper surface outer edge department, and revolve to keeping unanimous with the turbine direction of rotation.

2. The turbine rotating shaft structure for reducing oil leakage according to claim 1, wherein: get rid of oil groove (3) and set up to a plurality of, around keeping off outer edge evenly distributed of oil platform (2) upper surface.

3. The turbine rotating shaft structure for reducing oil leakage according to claim 1, wherein: the oil throwing groove (3) is axially arranged along the outer edge of the end surface of the compressor, and the oil throwing groove (3) is obliquely directed to the inner side from the outer edge of the opening.

4. The turbine rotating shaft structure for reducing oil leakage according to claim 1, wherein: the length D of the oil throwing groove (3) is not more than two thirds of the width D of the oil baffle table (2).

5. The turbine rotating shaft structure for reducing oil leakage according to claim 1, wherein: and by taking the rotation direction of the turbine as reference, the included angle beta between the front edge of the oil throwing groove (3) and the radial direction is smaller than the included angle alpha between the rear edge and the radial direction, and the angles of the beta and the alpha are both smaller than 30 degrees.

6. The turbine rotating shaft structure for reducing oil leakage according to claim 1, wherein: the blades on the periphery of the turbine rotating shaft (1) are of a bending structure.

Technical Field

The invention belongs to the technical field of exhaust gas turbocharging, and relates to a turbine rotating shaft structure for reducing oil leakage.

Background

In the development of power-equipped technology, a turbocharger is increasingly gaining attention as a main means for improving the power performance of an engine. The boost pressure and efficiency of the compressor in the supercharger are the primary means of improving supercharger performance. The turbocharger needs to be lubricated when working, a compressor and a turbine end work with high-pressure gas, lubricating oil and the gas need to be effectively isolated, so that the turbine end and the compressor end need to be effectively sealed, the sealing is not only used for reducing air or engine waste gas entering a bearing body, but also used for preventing lubricating oil in the bearing body from leaking into a volute and a compressor shell, and due to the fact that the working environment of the turbocharger is complex, under certain special working conditions, excessive oil leakage can hinder normal operation of an engine and the turbocharger. The oil leakage is likely to occur at the sealing ring at the turbine end, so that a turbine rotating shaft structure for reducing the oil leakage is urgently needed to prevent the oil leakage at the turbine end of the supercharger.

Disclosure of Invention

The invention aims to provide a turbine rotating shaft structure for reducing oil leakage, which can prevent the oil leakage at the turbine end of a supercharger and ensure the normal working state of the turbocharger.

In order to solve the technical problems, the invention adopts the technical scheme that:

the utility model provides a reduce turbine pivot structure of oil leak, includes the turbine pivot, keeps off the oil platform and gets rid of the oil groove, the cover is equipped with whirlpool end bearing and turbine seal ring groove in the turbine pivot, it sets up between whirlpool end bearing and turbine seal ring groove to keep off the oil platform, get rid of the oil groove setting and keep unanimous at fender oil bench surface outer edge department, and revolve to keeping unanimous with the turbine direction of rotation.

Furthermore, the oil throwing grooves are arranged to be a plurality of and are evenly distributed around the outer edge of the upper surface of the oil baffle table.

Further, the oil throwing grooves are axially arranged along the outer edge of the end surface of the compressor, and the oil throwing grooves are obliquely directed inwards from the outer edge of the opening.

Further, the length D of the oil throwing groove is not more than two thirds of the width D of the oil baffle table.

Further, by taking the rotation direction of the turbine as reference, the included angle beta between the front edge of the oil throwing groove and the radial direction is smaller than the included angle alpha between the rear edge of the oil throwing groove and the radial direction, and the included angles of the beta and the alpha are both smaller than 30 DEG

Furthermore, the blades on the periphery of the turbine rotating shaft are of a bending structure.

Compared with the prior art, the invention has the following advantages and positive effects.

1. When the lubricating oil flows to the oil baffle table, the oil throwing groove rotating along with the turbine can throw the lubricating oil to the oil return cavity in the bearing body, so that the lubricating oil is prevented from flowing to the turbine sealing ring groove or the turbine head, and the oil leakage condition at the turbine end is effectively avoided.

2. The length D of the oil groove does not exceed two thirds of the width D of the oil baffle table, so that the stress concentration of the root part of the oil baffle table is prevented.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:

FIG. 1 is a schematic view of a turbine rotor shaft configuration for reducing oil leakage;

FIG. 2 is a partial schematic view of the structure of an oil baffle table and an oil slinger according to the present invention;

FIG. 3 is a schematic diagram of the dimensional parameters of the oil slinger according to the present invention.

Description of reference numerals:

1-a turbine shaft; 2-oil blocking platform; and 3-oil throwing groove.

Detailed Description

It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

As shown in fig. 1 to 3, a reduce turbine shaft structure of oil leak, including turbine shaft 1, keep off oil platform 2 and get rid of oil groove 3, the cover is equipped with vortex end bearing and turbine seal ring groove on the turbine shaft 1, keep off oil platform 2 and set up between vortex end bearing and turbine seal ring groove, get rid of oil groove 3 and set up in keeping off 2 upper surface outer edge departments of oil platform, and revolve to keeping unanimous with the turbine direction of rotation, when lubricating oil flows to keeping off oil platform 2, get rid of lubricating oil to the internal oil return chamber of bearing along with turbine pivoted get rid of oil groove 3, prevent lubricating oil flow to turbine seal ring groove or turbine wheel head, thereby the effectual oil leak condition of avoiding the turbine end.

As shown in fig. 2, preferably, the oil slinger 3 is provided in a plurality of numbers, and is uniformly distributed around the outer edge of the upper surface of the oil baffle platform 2, so that the lubricating oil can flow back to the oil cavity by the rotation of the oil slinger 3.

As shown in fig. 3, preferably, the oil slinger 3 is arranged along the outer axial direction of the end surface of the compressor, and the oil slinger 3 is directed to the inner side from the opening of the outer edge and is thrown to the oil return cavity in the bearing body from the inner side.

As shown in fig. 3, the length D of the oil slinger 3 is preferably not more than two thirds of the width D of the oil baffle 2 to prevent stress concentration at the root of the oil baffle.

As shown in fig. 3, preferably, with the rotation direction of the turbine as a reference, an included angle β between the front edge and the radial direction of the oil slinging groove 3 is smaller than an included angle α between the rear edge and the radial direction, and both angles of β and α are smaller than 30 °, the oil slinging angle of the oil slinging groove 3 is controlled, and the lubricating oil is slinged into the oil cavity.

As shown in fig. 1 and 2, the blades of the turbine shaft 1 are bent.