CN214742329U - Built-in skeleton structure formula centrifugal impeller - Google Patents

Abstract

The utility model discloses a built-in skeleton structure formula centrifugal impeller, which comprises a hollow hub, wherein the hollow hub is provided with a shaft hole, the outer surface of the hollow hub is provided with an arc-shaped outer surface, and main blades and guide blades are arranged on the arc-shaped outer surface in an array manner; the hollow hub is internally provided with a cavity, a main blade framework and a guide blade framework, one end of the main blade framework is connected with the root part of the main blade, the other end of the main blade framework is connected with the inner wall surface of the shaft hole, one end of the guide blade framework is connected with the root part of the guide blade, and the other end of the guide blade framework is connected with the inner wall surface of the shaft hole; a plurality of guide grooves are arranged between the adjacent main blades and the guide blades; and the upper end of the hollow hub is provided with a dynamic balance weight hole. The utility model discloses a built-in skeleton texture has reduced centrifugal impeller's whole weight, simultaneously, can effectively improve centrifugal compressor work efficiency.

Description

Built-in skeleton structure formula centrifugal impeller

Technical Field

The utility model relates to a centrifugal impeller technical field, concretely relates to built-in skeleton structural formula centrifugal impeller.

Background

Compared with an axial-flow compressor, the centrifugal compressor has the advantages of simple structure, large single-stage pressurization ratio and the like. The problem of large flow loss, large frontal area, and the like is not significant when the air flow rate is small, and therefore, the air flow control device is widely used in small-sized turbojet and turboshaft engines. The centrifugal impeller has large radius at the outlet, and the impeller with a solid hub structure has large weight and lower weight ratio of blades. Moreover, the small engine has high rotating speed, and the hub bears huge centrifugal load in the running process of the engine.

The existing centrifugal impeller is limited by the traditional forging and casting process, and the internal complex structure is difficult to process, so that the centrifugal impeller is designed by adopting a solid structure mostly, and the overall weight of the centrifugal impeller is higher due to the structure; meanwhile, the centrifugal compressor has the defects of large windward side size and low efficiency due to the self-modeling design characteristics.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the problem that will solve is: the centrifugal impeller with the built-in framework structure is provided, the built-in framework structure is adopted, the overall weight of the centrifugal impeller is reduced, and meanwhile, the working efficiency of a centrifugal compressor can be effectively improved.

The utility model discloses a solve the technical scheme that above-mentioned problem provided and do: a built-in skeleton structure type centrifugal impeller comprises a hollow hub, wherein a shaft hole is formed in the hollow hub, an arc-shaped outer surface is arranged on the outer surface of the hollow hub, and main blades and guide blades are arranged on the arc-shaped outer surface in an array mode; the hollow hub is internally provided with a cavity, a main blade framework and a guide blade framework, one end of the main blade framework is connected with the root part of the main blade, the other end of the main blade framework is connected with the inner wall surface of the shaft hole, one end of the guide blade framework is connected with the root part of the guide blade, and the other end of the guide blade framework is connected with the inner wall surface of the shaft hole; a plurality of guide grooves are arranged between the adjacent main blades and the guide blades; and the upper end of the hollow hub is provided with a dynamic balance weight hole.

Preferably, the guide grooves are matched with the main blades or the guide blades in line type.

Preferably, the wall thickness of the shaft hole is varied, and the position where the wall thickness of the shaft hole is the largest is close to the lower end of the shaft hole.

Preferably, the guide slots between adjacent main blades and guide blades are three groups.

Preferably, the depth of the diversion trench is gradually deepened from top to bottom.

Preferably, the lower end of the hollow hub is provided with a dynamic balance weight-removing belt.

Compared with the prior art, the utility model has the advantages that:

1. the utility model discloses a built-in skeleton texture has reduced centrifugal impeller's whole weight, has guaranteed centrifugal impeller's bulk strength simultaneously.

2. The utility model discloses cell wall between the guiding gutter forms streamlined protruding muscle, and the similar small-size blade of protruding muscle can prevent main blade and guiding vane's blade root air flow separation at centrifugal impeller during operation, can play the purpose that increases impeller work load and reduce the gas flow loss again to the gas work to effectively improve centrifugal compressor work efficiency.

3. The utility model discloses a dynamic balance counter weight is downthehole can place extra counter weight screw and come the trim front end unbalance amount, goes to heavily taking to adopt modes such as cutting to get rid of the material at the wheel hub lower extreme and forms dynamic balance to go to heavily taking to eliminate the unbalance amount and guaranteed that centrifugal impeller can fast-speed stable rotatory.

Drawings

The accompanying drawings, which are described herein, serve to provide a further understanding of the invention and constitute a part of this specification, and the exemplary embodiments and descriptions thereof are provided for explaining the invention without unduly limiting it.

Fig. 1 is a front view of the present invention;

fig. 2 is a top view of the present invention;

FIG. 3 is a cross-sectional view A-A of FIG. 2;

fig. 4 is a perspective partial sectional view of the present invention.

The attached drawings are marked as follows: 1. guide vane skeleton, 2, convex surface, 3, hollow wheel hub, 4, guiding gutter, 5, main vane skeleton, 6, guide vane, 7, main vane, 8, cavity, 9, shaft hole, 10, dynamic balance weight hole.

Detailed Description

The following detailed description will be made with reference to the accompanying drawings and examples, so that how to implement the technical means of the present invention to solve the technical problems and achieve the technical effects can be fully understood and implemented.

In the description of the present invention, it should be noted that, for the orientation words, if there are terms such as "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., the orientation and positional relationship indicated are based on the orientation or positional relationship shown in the drawings, and only for the convenience of describing the present invention and simplifying the description, it is not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and not be construed as limiting the specific scope of the present invention.

Furthermore, if the terms "first" and "second" are used for descriptive purposes only, they are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features. Thus, the definition of "a first" or "a second" feature may explicitly or implicitly include one or more of the features, and in the description of the invention, "a plurality" means two or more unless specifically defined otherwise.

In the present invention, unless otherwise expressly specified or limited, the terms "assembled", "connected", and "connected", if any, are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; or may be a mechanical connection; the two elements can be directly connected or connected through an intermediate medium, and the two elements can be communicated with each other. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to specific situations.

The specific embodiment of the utility model is shown in fig. 1-4, 1, a built-in skeleton structure formula centrifugal impeller, including hollow hub 3, be equipped with shaft hole 9 on the hollow hub 3, the surface of hollow hub 3 is provided with convex surface 2, the array is provided with main blade 7 and guide vane 6 on convex surface 2; a cavity 8, a main blade framework 5 and a guide vane framework 1 are arranged in the hollow hub 3, one end of the main blade framework 5 is connected with the root of a main blade 7, the other end of the main blade framework is connected with the inner wall surface of a shaft hole 9, one end of the guide vane framework 1 is connected with the root of a guide vane 6, and the other end of the guide vane framework is connected with the inner wall surface of the shaft hole 9; a plurality of guide grooves 4 are arranged between the adjacent main blades 7 and the guide blades 6; and the upper end of the hollow hub 3 is provided with a dynamic balance weight hole 10.

In the present embodiment, the guide grooves 4 match the line shape of the main blades 7 or the guide blades 6.

In this embodiment, the wall thickness of the axial hole 9 is varied, and the position where the wall thickness of the axial hole 9 is largest is near the lower end of the axial hole 9.

In the present embodiment, the guide grooves 4 between the adjacent main blades 7 and guide vanes 6 are three groups.

In this embodiment, the depth of the guiding groove 4 is gradually deepened from top to bottom.

In this embodiment, the lower end of the hollow hub 3 is provided with a dynamic balance deadweight belt.

The foregoing is illustrative of the preferred embodiments of the present invention only, and is not to be construed as limiting the claims. The present invention is not limited to the above embodiments, and the specific structure thereof is allowed to be changed. All changes which come within the scope of the independent claims of the invention are to be embraced within their scope.

Claims (6)

1. A built-in skeleton structural formula centrifugal impeller which characterized in that: the wind power generator comprises a hollow hub (3), wherein a shaft hole (9) is formed in the hollow hub (3), a circular arc-shaped outer surface (2) is arranged on the outer surface of the hollow hub (3), and main blades (7) and guide blades (6) are arranged on the circular arc-shaped outer surface (2) in an array manner; a cavity (8), a main blade framework (5) and a guide vane framework (1) are arranged in the hollow hub (3), one end of the main blade framework (5) is connected with the root of the main blade (7), the other end of the main blade framework is connected with the inner wall surface of the shaft hole (9), one end of the guide vane framework (1) is connected with the root of the guide vane (6), and the other end of the guide vane framework is connected with the inner wall surface of the shaft hole (9); a plurality of guide grooves (4) are arranged between the adjacent main blades (7) and the guide blades (6); the upper end of the hollow hub (3) is provided with a dynamic balance weight hole (10).

2. The centrifugal impeller of claim 1, wherein: the guide groove (4) is matched with the line type of the main blade (7) or the guide blade (6).

3. The centrifugal impeller of claim 1, wherein: the wall thickness of the shaft hole (9) is changed, and the position where the wall thickness of the shaft hole (9) is maximum is close to the lower end of the shaft hole (9).

4. The centrifugal impeller of claim 1, wherein: the guide grooves (4) between the adjacent main blades (7) and the guide blades (6) are divided into three groups.

5. The centrifugal impeller of claim 4, wherein: the depth of the diversion trench (4) is gradually deepened from top to bottom.

6. The centrifugal impeller of claim 1, wherein: the lower end of the hollow hub (3) is provided with a dynamic balance weight-removing belt.

Images