阅读说明：本技术 一种带弹性台的压气机叶轮 (Compressor impeller with elastic table ) 是由 王振彪 刘畅 于 2019-10-14 设计创作，主要内容包括：本发明提供了一种带弹性台的压气机叶轮,包括轮毂和叶片；还包括弹性台,所述轮毂的左边连接所述弹性台,所述弹性台为中空的回转体薄壁结构,外径小于所述轮毂的进口处直径；所述弹性台的左侧向内收缩形成翻边,所述弹性台的左侧端面为弹性台压紧面；所述弹性台压紧面与所述轮背压紧面平行。相对于现有技术,本发明具有以下优势：由于压气机叶轮轮毂的进口部位增加了弹性台,所以在压气机叶轮安装时,弹性台分担了大部分轴端螺母的预紧力,提高了压气机叶轮的抗变形能力,即使转子在超速情况下,压气机叶轮的轴向尺寸变化也很小,轴端螺母不会失去预紧力,避免了轴端螺母松脱的故障。(The invention provides a compressor impeller with an elastic table, which comprises a hub and blades; the left side of the hub is connected with the elastic table, the elastic table is of a hollow rotary body thin-wall structure, and the outer diameter of the elastic table is smaller than the diameter of the inlet of the hub; the left side of the elastic table is contracted inwards to form a flange, and the left end face of the elastic table is an elastic table pressing face; the elastic table pressing surface is parallel to the wheel back pressing surface. Compared with the prior art, the invention has the following advantages: because the elastic table is additionally arranged at the inlet part of the hub of the compressor impeller, when the compressor impeller is installed, the elastic table shares most of pretightening force of the shaft end nut, the deformation resistance of the compressor impeller is improved, the axial size change of the compressor impeller is small even if a rotor is in an overspeed condition, the pretightening force of the shaft end nut cannot be lost, and the fault that the shaft end nut is loosened is avoided.)

1. The compressor impeller with the elastic table comprises a hub (5) and blades (4), wherein the blades (4) are mounted outside the hub (5); the method is characterized in that:

the hub is characterized by further comprising an elastic table (2), the diameter of the hub (5) gradually increases from left to right along the airflow direction, a left mounting hole (3) and a right mounting hole (7) are formed in the hub, and a cavity (6) with a larger inner diameter is formed between the left mounting hole (3) and the right mounting hole (7); the right end of the hub (5) protrudes to form a wheel back pressure surface (8);

the left side of the hub (5) is connected with the elastic table (2), the elastic table (2) is of a hollow rotary body thin-wall structure, and the outer diameter of the elastic table is smaller than the diameter of the inlet of the hub (5); the left side of the elastic table (2) is contracted inwards to form a flanging, and the diameter of a flanging forming hole is slightly larger than the pore diameter of the left mounting hole (3) and the right mounting hole (7); the left end face of the elastic table (2) is an elastic table pressing face (1); the elastic table pressing surface (1) is parallel to the wheel back pressing surface (8).

2. The compressor wheel with elastomeric lands of claim 1, wherein: the axial dimension of the elastic table (2) is smaller than that of the hub (5).

Technical Field

The invention belongs to the technical field of electromechanics, and particularly relates to a compressor impeller with an elastic table.

Background

The compressor impeller of the turbocharger is pressed on the rotating shaft by virtue of the shaft end nut, the compressor impeller can deform under certain working conditions, such as overspeed of a rotor, the diameter of the compressor impeller is increased, the axial size of the compressor impeller is reduced, the shaft end nut loses pretightening force, and the shaft end nut is loosened.

Disclosure of Invention

In view of the above, the present invention is directed to a compressor impeller with an elastic table, in which the elastic table is added at an inlet of a hub of the compressor impeller, so that when the compressor impeller is installed, the elastic table shares a majority of pre-tightening force of a shaft end nut, so as to improve deformation resistance of the compressor impeller, and even when a rotor is in an overspeed condition, the axial dimension of the compressor impeller changes very little, the shaft end nut does not lose the pre-tightening force, thereby avoiding a failure of loosening the shaft end nut.

In order to achieve the purpose, the technical scheme of the invention is realized as follows:

the compressor impeller with the elastic table comprises a hub and blades, wherein the blades are mounted outside the hub; the hub is provided with a left mounting hole and a right mounting hole, and a cavity with a larger inner diameter is arranged between the left mounting hole and the right mounting hole; the protruding part of the right end of the hub forms a wheel back pressure tight surface;

the left side of the hub is connected with the elastic table, the elastic table is of a hollow rotary body thin-wall structure, and the outer diameter of the elastic table is smaller than the diameter of the inlet of the hub; the left side of the elastic table is contracted inwards to form a flange, and the diameter of a flange forming hole is slightly larger than the diameters of the left mounting hole and the right mounting hole; the left end face of the elastic table is an elastic table pressing face; the elastic table pressing surface is parallel to the wheel back pressing surface.

Further, the axial dimension of the elastic table is smaller than the axial dimension of the hub.

Compared with the prior art, the invention has the following advantages:

the elastic table is additionally arranged at the inlet part of the hub of the compressor impeller, so that when the compressor impeller is installed, the elastic table shares most of pretightening force of the shaft end nut, the deformation resistance of the compressor impeller is improved, the axial size change of the compressor impeller is small even if a rotor is in an overspeed condition, the pretightening force of the shaft end nut cannot be lost, and the fault that the shaft end nut is loosened is avoided.

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 structural cross-sectional view of a compressor wheel with an elastic table according to an embodiment of the present invention.

Description of reference numerals:

1-elastic table pressing surface, 2-elastic table, 3-left mounting hole, 4-blade, 5-hub, 6-cavity, 7-right mounting hole and 8-wheel back pressing surface.

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, a compressor impeller with an elastic table comprises a hub 5, an elastic table 2 and blades 4; the hub 5 is gradually increased in diameter from left to right along the airflow direction, a left mounting hole 3 and a right mounting hole 7 are formed in the hub, and a cavity 6 with a larger inner diameter is formed between the left mounting hole 3 and the right mounting hole 7; the blades 4 are mounted on the outer part of the hub 5; the left side of the hub 5 is connected with the elastic table 2; the protruding part of the right end of the hub 5 forms a wheel back pressure tight surface 8;

the elastic table 2 is of a hollow rotary body thin-wall structure, and the outer diameter of the elastic table is smaller than the diameter of the inlet of the hub 5; the left side of the elastic table 2 contracts inwards to form a flange, and the diameter of a flange forming hole is slightly larger than the diameters of the left mounting hole 3 and the right mounting hole 7.

The left end face of the elastic table 2 is an elastic table pressing face 1; the elastic table pressing surface 1 is parallel to the wheel back pressing surface 8.

The axial dimension of the elastic table 2 is smaller than the axial dimension of the hub 5.

Because the elastic table 2 is added at the inlet part of the hub 5 of the compressor impeller, when the compressor impeller is installed, the elastic table 2 shares most of the pretightening force of the shaft end nut, the deformation resistance of the compressor impeller is improved, the axial size change of the compressor impeller is small even if a rotor is in an overspeed condition, the pretightening force of the shaft end nut cannot be lost, and the fault that the shaft end nut is loosened is avoided.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.