CN214465071U

CN214465071U - Thrust disc of centrifugal air compressor

Info

Publication number: CN214465071U
Application number: CN202120380393.9U
Authority: CN
Inventors: 邢子义; 王升科; 焦玉学; 张会明; 张超; 徐树伍
Original assignee: Yantai Dongde Industrial Co Ltd
Current assignee: Yantai Dongde Industrial Co Ltd
Priority date: 2021-02-20
Filing date: 2021-02-20
Publication date: 2021-10-22
Anticipated expiration: 2031-02-20

Abstract

The utility model provides a centrifugal air compressor machine thrust dish, thrust dish and main shaft fixed connection locate between the axial air bearing, be equipped with the fixed station on the thrust dish, the centre of a circle symmetry is equipped with a plurality of thrust dish locating holes corresponding with main shaft locating hole position on the fixed station, the thrust dish pass through the locating pin with main shaft fixed connection, the thrust dish lateral part is equipped with cooling groove. The utility model discloses be equipped with the fixed distance that the boss formula fixed station has lengthened the thrust dish, increased the stability of thrust dish. Be equipped with a plurality of cooling structures on the thrust dish, can realize the cooling to axial bearing.

Description

Thrust disc of centrifugal air compressor

Technical Field

The utility model relates to a hydrogen fuel cell engine technical field, concretely relates to centrifugal air compressor machine thrust dish.

Background

The development of new energy fuel cell automobiles is considered to be an important link of traffic energy power transformation at present and is paid much attention. Proton exchange membrane fuel cells are currently the most mature representative of the fuel cell family. The device takes hydrogen and air (oxygen in the air) as fuel to generate electrochemical reaction, and directly converts the chemical energy of the fuel into electric energy to generate water. The energy-saving automobile engine has the advantages of no pollution, high efficiency, wide application, low noise, quick start at room temperature, capability of quickly supplementing energy, modular structure and the like, and is likely to become one of main power sources of automobiles following the traditional internal combustion engine.

In order to ensure the normal operation of the fuel cell engine, the engine generally needs auxiliary systems such as a hydrogen supply subsystem, an air supply subsystem and a circulating water cooling management subsystem. A number of studies have shown that high pressure, high flow air supply has a significant effect on improving the power output of existing fuel cell engines. Therefore, before air enters the engine, the air compressor is an energy conversion device for realizing the purpose, and is one of important parts of an air supply system of the fuel cell engine.

At present, a centrifugal air compressor is generally designed in a motor direct-drive mode, a motor rotor and a main shaft are made into an integrated structure, a centrifugal impeller is fixedly connected to the end of the main shaft, and the impeller is arranged in a volute. Under the super-high speed rotation of the motor rotor, the impeller drives gas to rotate at high speed, the gas and the volute interact to generate high-pressure and large-flow air which is supplied to a fuel cell engine for the generation of electrochemical reaction inside a fuel cell stack, and the bearing supports the main shaft-impeller integrated rotating part to rotate at high speed.

Meanwhile, in order to increase the pressure and flow rate of the output air, the centrifugal air compressor often adopts a rotating speed control implementation mode of ultrahigh rotating speed (above 80000 rpm), which causes the danger of damage to the supporting parts such as bearings, and in addition, the ultrahigh speed rotor also causes the problems of heat dissipation and cooling,

in the operation process of the centrifugal compressor, due to the difference of air flow pressure of all parts of the whole rotor, the forces acting on the rotor are mutually superposed in the axial direction of the rotor to form a total resultant force, namely axial force. After most of axial force is offset by reasonably arranging impellers on the rotor and arranging the balance disc, the rest axial force is borne by the thrust disc, the thrust disc and the air floatation bearings on the two sides move relatively to generate an air film for bearing the axial force, on one hand, the stress on the two sides is adjusted through the thickness of the air film, and meanwhile, the impact and the vibration in the operation process can be absorbed. In the prior art, one side of the thrust disc close to the shaft head is provided with a locking nut so as to strengthen the locking effect and prevent the locking nut from loosening. However, the locking nut is connected through the screw thread, the axial acting force is not enough all the time, and the thrust disc cannot be locked well. The thrust disc and the main shaft are dynamically balanced after being assembled, the relative position is not accurately positioned when the thrust disc is disassembled and reassembled after dynamic balance, and the thrust disc is easy to damage and deform.

In conclusion, how to ensure the stability of the dynamic balance front and back installation of the thrust disk and the cooling of the bearing is a problem to be solved at the present stage.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem the utility model aims at providing a centrifugal air compressor machine thrust dish, thrust dish and main shaft fixed connection locate between the axial air bearing, be equipped with the fixed station on the thrust dish, the centre of a circle symmetry is equipped with a plurality of thrust dish locating holes corresponding with main shaft locating hole position on the fixed station, the thrust dish pass through the locating pin with main shaft fixed connection, the thrust dish lateral part is equipped with the cooling recess.

Furthermore, a plurality of cooling holes are formed in the fixing table.

Further, the inside of the cooling groove is a circular arc.

Furthermore, the cross-sectional shape of the thrust disc is a convex structure.

Furthermore, the positioning hole is of a step-shaped structure.

The utility model has the advantages that:

(1) the utility model discloses be equipped with the fixed distance that the boss formula fixed station has lengthened the thrust dish, increased the stability of thrust dish.

(2) Be equipped with a plurality of cooling structures on the thrust dish, can realize the cooling to axial bearing.

Drawings

FIG. 1 is a sectional view of the mounting structure of the present invention;

fig. 2 is a structural diagram of the present invention.

Drawing reference number

The thrust plate comprises a thrust plate (1), a main shaft (2), an axial air bearing (3), a fixing table (4), a thrust plate positioning hole (5), a cooling groove (6) and a cooling hole (7).

Detailed Description

The following detailed description of the present invention will be made with reference to the accompanying drawings, which are provided for illustration purposes only to help understanding the present invention and are not to be construed as limiting the present invention.

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout.

The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; 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 according to specific situations by those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

Example 1

As shown in fig. 1 and 2 the utility model discloses a centrifugal air compressor machine thrust dish, thrust dish 1 and 2 fixed connection of main shaft locate between the axial air bearing 3, be equipped with fixed station 4 on the thrust dish 1, the cross sectional shape of thrust dish 1 is type structure, the centre of a circle symmetry is equipped with a plurality of thrust dish locating holes 5 corresponding with main shaft locating hole position on the fixed station 4, thrust dish 1 pass through the locating pin with 2 fixed connection of main shaft, 1 lateral part of thrust dish is equipped with cooling groove 6.

The fixed table 4 is provided with a plurality of cooling holes 7. The cooling groove 6 is internally provided with a circular arc.

The thrust disc positioning hole 5 is of a step-shaped structure.

The embodiments of the present invention, it is understood that the above embodiments are exemplary and not intended to be construed as limiting, and those skilled in the art can change, modify, replace and modify the above embodiments without departing from the spirit and scope of the present invention, and the simple combination of the above embodiments is listed as the protection of the present invention.

Claims

1. The utility model provides a centrifugal air compressor machine thrust dish, thrust dish (1) and main shaft (2) fixed connection locate between axial air bearing (3), its characterized in that, be equipped with fixed station (4) on thrust dish (1), the centre of a circle symmetry is equipped with a plurality of thrust dish locating holes (5) corresponding with main shaft locating hole position on fixed station (4), thrust dish (1) through the locating pin with main shaft (2) fixed connection, thrust dish (1) lateral part is equipped with cooling groove (6).

2. The centrifugal air compressor thrust disc according to claim 1, characterized in that: and a plurality of cooling holes (7) are formed in the fixed table (4).

3. The centrifugal air compressor thrust disc according to claim 1, characterized in that: the inner part of the cooling groove (6) is a circular arc.

4. The centrifugal air compressor thrust disc according to claim 1, characterized in that: the cross section of the thrust disc (1) is in a convex structure.

5. The centrifugal air compressor thrust disc according to claim 1, characterized in that: the thrust disc positioning hole (5) is of a step-shaped structure.