CN213144737U

CN213144737U - Lightweight vacuum pump rotor

Info

Publication number: CN213144737U
Application number: CN202020911581.5U
Authority: CN
Inventors: 陈泽雨; 郑红江; 戚亚克; 周培良; 罗玉龙
Original assignee: Ningbo Shenglong Automotive Powertrain System Co Ltd
Current assignee: Ningbo Shenglong Automotive Powertrain System Co Ltd
Priority date: 2020-05-26
Filing date: 2020-05-26
Publication date: 2021-05-07
Anticipated expiration: 2030-05-26

Abstract

The utility model discloses a lightweight vacuum pump rotor, which comprises a rotor body, wherein the rotor body comprises a driving end and a connecting end along the axial direction, the driving end and the connecting end are of an integrated structure, one end of the connecting end, which is far away from the driving end, is provided with a connecting piece, the rotor body is made of plastic materials, and the connecting piece is made of metal materials; and one end of the connecting piece is injection molded in the connecting end. The utility model discloses a lightweight vacuum pump rotor, the quality is light, can reduce self consumption, the energy can be saved.

Description

Lightweight vacuum pump rotor

Technical Field

The utility model belongs to the technical field of automobile engine vacuum pump technique and specifically relates to a lightweight vacuum pump rotor.

Background

The mechanical vacuum pump functions to generate negative pressure, thereby increasing braking force. The vacuum pump continues to operate since the vehicle is started, thereby continuously causing power consumption; the reduction of the power consumption of the vacuum pump is imperative under the requirement of continuously reducing the energy consumption of each part of the whole vehicle.

In the operation process of the vacuum pump, the shaft coupling drives the rotor and the blades to rotate, and gas and oil are discharged from the oil outlet while air is extracted from the outside; in addition to the work of the discharged oil, the vacuum pump needs to overcome the force between the vanes and the pump cavity to do work and to bear the consumption of the rotor vanes during rotation. The work consumed by the rotation of the rotor and the blades is related to the weight of the parts, and the larger the weight is, the higher the energy consumption is.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the technical problem that will solve is: the defects of the prior art are overcome, and the lightweight vacuum pump rotor which is light in weight and capable of reducing self power consumption is provided.

The utility model adopts the technical proposal that: the lightweight vacuum pump rotor comprises a rotor body, wherein the rotor body comprises a driving end and a connecting end along the axial direction, the driving end and the connecting end are of an integrated structure, a connecting piece is arranged at one end, far away from the driving end, of the connecting end, the rotor body is made of plastic materials, and the connecting piece is made of metal materials; and one end of the connecting piece is injection molded in the connecting end.

Compared with the prior art, the utility model has the following advantage:

the utility model discloses a rotor structure compares and is the steel material in prior art whole rotor, and this novel in pivot includes the rotor body of plastics material and the connecting piece of metal material to the integrative injection moulding of metal connecting piece forms complete rotor structure in plastic body. The structure greatly reduces the quality of the whole rotor on the premise of meeting various indexes such as high temperature resistance, friction resistance and hardness requirements and the like required by the rotor, reduces the power consumption of the vacuum pump which needs to overcome the weight of the rotor during working, saves energy and accords with the development trend of light weight.

As the improvement, the connecting piece injection moulding is equipped with spacing portion in the one end of link to improve connecting piece and rotor body fashioned structural strength.

Preferably, the limiting part comprises a groove which is concave to the outer surface of the connecting piece or a bulge which is convex to the outer surface of the connecting piece. After the end surface of moulding plastics at the connecting piece sets up corresponding recess or protruding structure, can form corresponding additional strengthening after with rotor body injection moulding, for example, set up the recess in the connecting piece outside, injection moulding connects the back plastics composition and can extend to in the recess, forms corresponding projection, just so makes connecting piece and link have stronger joint strength.

And the rotor body comprises an outer surface layer and an inner core which are made of different materials from outside to inside, and the outer surface layer is formed outside the inner core through secondary injection molding. Because the inner layer and the outer layer of the rotor body have different performances required to be met, in order to better ensure the overall mechanical performance of the rotor body, the outer layer and the inner core are formed by two different materials.

Preferably, the inner core is made of PPS-GF40, and the outer surface layer is made of phenolic molding plastic. The PPS-GF40 material is selected in the structure, so that the inner core part has excellent high temperature resistance, and meanwhile, good structural strength is required to be ensured; the phenolic molding compound is selected to ensure that the outer surface layer has good high temperature resistance and wear resistance and simultaneously meets the requirement of high strength.

More preferably, the thickness of the outer layer is 1-2 mm. The weight of the rotor main body is reduced, and meanwhile the wear resistance and hardness requirements of the outer surface of the rotor main body can be guaranteed.

Drawings

Fig. 1 is a structural view of a rotor of a lightweight vacuum pump according to the present invention.

Fig. 2 is another angle structure view of the rotor of the light weight vacuum pump of the present invention.

Fig. 3 is a structural view of a connecting member according to one form of the present invention.

Fig. 4 is a structural view of another form of the connector of the present invention.

Fig. 5 is a radial sectional view of the driving end of the rotor of the lightweight vacuum pump according to the present invention.

Wherein, 1-rotor body, 1.1-driving end, 1.1.1-driving groove, 1.2-connecting end, 2-connecting piece, 2.1-groove, 2.2-bump, 3-outer surface layer and 4-inner core.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and the following detailed description.

As shown in fig. 1-5, the utility model provides a lightweight vacuum pump rotor, including rotor body 1, rotor body 1 includes drive end 1.1 and link 1.2 along the axial, drive end 1.1 and link 1.2 formula structure as an organic whole. A driving groove 1.1.1 which radially penetrates through the entire driving end 1.1 is also arranged at one end of the driving end 1.1 which is far away from the connecting end 1.2.

In addition, a connecting piece 2 is arranged at one end of the connecting end 1.2 far away from the driving end 1.1, and a connecting hole is formed at the other end of the connecting piece 2. In this embodiment, the rotor body 1 is made of plastic, and the connecting member 2 is made of metal, specifically, steel. The connecting member 2 is still made of steel material because the end of the connecting member 2 contacting the coupling needs to cope with the impact force generated during the starting process of the coupling.

In this embodiment, one end of the connecting member 2 is injection molded in the connecting end 1.2, so that the connecting member 2 and the rotor body 1 are of an integral structure. On the other hand, in order to improve the connection strength between the connection member 2 and the rotor body 1, a corresponding limiting portion is arranged at one end of the connection member 2, which is formed in the connection end 1.2 through injection molding. Specifically, the limiting part comprises a groove 2.1 which is concave in the outer surface of the connecting piece 2, and a bulge 2.2 which is convex out of the outer surface of the connecting piece 2. Specifically, after the connecting piece outside sets up recess 2.1, injection moulding is in the back plastics composition of an organic whole can extend to recess 2.1, forms corresponding projection, just so makes connecting piece 2 and link 1.2 have stronger joint strength. Similarly, after the end outer surface of the connecting piece 2 is provided with the protrusion 2.2, the connecting piece and the connecting end are integrally formed in an injection molding mode, the connecting end 1.2 made of plastic can form a corresponding concave part matched with the protrusion 2.2, so that the connecting piece 2 and the connecting end 1.2 are provided with a limiting mechanism in the axial direction, and the structural strength after injection molding connection is effectively improved.

The rotor body 1 comprises an outer surface layer 3 and an inner core 4 which are made of different materials from outside to inside, and the outer surface layer 3 is formed outside the inner core 4 through secondary injection molding. Preferably, the inner core 4 is made of PPS-GF40, and the outer surface layer 3 is made of phenolic molding compound; more specifically, the thickness of the outer surface layer 3 is 1-2 mm.

In the utility model, the rotor body 1 is made of high-performance plastic material, and the connecting piece 2 with the tail part contacting with the shaft coupling is made of steel material; the specific processing method comprises the following steps:

firstly, forming an inner core 4 of a rotor main body 1 on a connecting piece 2 made of steel by injection molding for the first time, wherein the inner core 4 can be made of PPS GF40 to meet the requirements of the working temperature of a vacuum pump and the strength of a rotor; the outer surface layer 3 of the rotor body 1 is formed by transfer molding or injection molding for the second time, thermosetting plastics such as phenolic molding plastics are used as materials, and the materials have high heat resistance, high strength and high wear resistance and can meet the performance requirements required by the contact surface of the rotor; and finally, machining the external dimension of the molded rotor body 1 to meet the requirement of dimensional accuracy.

Therefore, the rotor structure in the scheme not only ensures the hardness and the wear resistance of the outer surface, but also meets the overall strength requirement, reduces the weight of the rotor while reducing the cost, and achieves the overall weight reduction of 60-70 percent, thereby realizing the requirement of light weight.

While the above is directed to the preferred embodiment of the present invention, it is not intended that it be limited, except as by the appended claims. The present invention is not limited to the above embodiments, and the specific structure thereof allows for changes, all the changes made within the protection scope of the independent claims of the present invention are within the protection scope of the present invention.

Claims

1. The utility model provides a lightweight vacuum pump rotor, includes rotor body (1), rotor body (1) including drive end (1.1) and link (1.2) along the axial, its characterized in that: the driving end (1.1) and the connecting end (1.2) are of an integrated structure, a connecting piece (2) is arranged at one end, far away from the driving end (1.1), of the connecting end (1.2), the rotor body (1) is made of plastic, and the connecting piece (2) is made of metal; and one end of the connecting piece (2) is injection molded in the connecting end (1.2).

2. The light-weighted vacuum pump rotor of claim 1, wherein: the one end of connecting piece (2) injection moulding in link (1.2) is equipped with spacing portion to improve connecting piece (2) and rotor body (1) fashioned structural strength.

3. The light-weighted vacuum pump rotor of claim 2, wherein: the limiting part comprises a groove (2.1) which is concave in the outer surface of the connecting piece (2) or a bulge (2.2) which is convex out of the outer surface of the connecting piece (2).

4. The light-weighted vacuum pump rotor of claim 1, wherein: the rotor body (1) comprises an outer surface layer (3) and an inner core (4) which are made of different materials from outside to inside, and the outer surface layer (3) is formed outside the inner core (4) in a secondary injection molding mode.

5. The light-weighted vacuum pump rotor of claim 4, wherein: the inner core (4) is made of PPS-GF40, and the outer surface layer (3) is made of phenolic molding plastic.

6. The light-weighted vacuum pump rotor of claim 4 or 5, wherein: the thickness of the outer surface layer (3) is 1-2 mm.