CN219366320U - Wear-resisting cavity structure of vacuum pump - Google Patents

Abstract

The utility model provides a wear-resistant cavity structure of a vacuum pump, which comprises a cylinder body, wherein the cylinder body is in a volute shape, an impeller is arranged in the cylinder body, a plurality of grooves are formed in the circumference of the impeller, the inner walls of the grooves are connected with springs, the springs are connected with blades, sliding ports are formed in two sides of the grooves and on the impeller, a plug pin matched with the sliding ports is arranged on the blades, the impeller is connected with a driving piece, and the impeller is connected with the driving piece through a connecting assembly; the impeller circumference sets up the recess, thereby the impeller passes through spring coupling blade in the recess, when blade and cylinder body inner wall friction, thereby the spring shrink reduces the friction between cylinder body and the blade, in addition, is provided with the slip mouth on the impeller in recess both sides and is located, sets up the bolt that corresponds on the blade, prevents that the blade in the recess from producing great swing to influence the work of vacuum pump.

Description

Wear-resisting cavity structure of vacuum pump

Technical Field

The utility model relates to the technical field of vacuum pump cavities, in particular to a wear-resistant cavity structure of a vacuum pump.

Background

Vacuum pumps are containers or devices that draw air from a container being evacuated by mechanical, physical, chemical or physicochemical means, and are conventionally devices that improve, create and maintain a vacuum in a closed space by various means.

The vacuum pump drives the blades and the terminals to rotate in the inner cavity of the shell by the impeller so as to generate the change of closed volume, and the air extraction and exhaust process is realized, but the impeller of the vacuum pump in the prior art generates friction with the inner wall of the shell when rotating, so that the contact surface is not big enough when the blades and the cylinder body are rubbed, and the vacuum degree is insufficient.

Disclosure of Invention

Aiming at the defects of the prior art, the utility model provides a wear-resistant cavity structure of a vacuum pump, which is beneficial to solving the problems that when a blade is driven by an impeller of the vacuum pump to rotate, friction is generated between the blade and the inner wall of a shell, so that the contact surface is not big enough when the blade and a cylinder body are rubbed, and the vacuum degree is insufficient.

In order to achieve the above purpose, the utility model is realized by the following technical scheme that the wear-resistant cavity structure of the vacuum pump comprises a cylinder body, wherein the cylinder body is in a volute shape, an impeller is arranged in the cylinder body, a plurality of grooves are circumferentially arranged on the impeller, the inner walls of the grooves are connected with springs, the springs are connected with blades, sliding ports are arranged on two sides of the grooves and positioned on the impeller, a plug pin matched with the sliding ports is arranged on the blades, the impeller is connected with a driving piece, and the impeller is connected with the driving piece through a connecting assembly.

Through adopting above-mentioned technical scheme, set up the recess in impeller circumference, the impeller passes through spring coupling blade in the recess, thereby the spring shrinkage reduces the friction between cylinder body and the blade when blade and the friction of cylinder body inner wall, in addition, is provided with the slip mouth on the impeller in recess both sides and is located, sets up the bolt that corresponds on the blade, prevents that the blade in the recess from producing great swing to influence the work of vacuum pump.

Optionally, elastic pads are arranged between the inner walls of the grooves and the springs.

By adopting the technical scheme, the elastic pad can slow down the abrasion of the spring.

Optionally, the coupling assembling includes connecting axle, connection pad and a plurality of connecting rod, connection pad one end is connected with the connecting axle, the connecting axle other end is connected with a plurality of connecting rod.

Through adopting above-mentioned technical scheme, the impeller passes through coupling assembling and is connected with the driving piece, does not set up the rotor in impeller center, has reduced the friction of impeller and rotor.

Optionally, the inner wall of the cylinder body is provided with a wear-resistant sleeve.

Through adopting above-mentioned technical scheme, when the impeller drives the blade and rotates, can slow down the friction between blade and the cylinder body.

Optionally, the wear-resistant sleeve is made of wear-resistant alloy steel.

By adopting the technical scheme, the wear resistance is good, the friction coefficient is low, and therefore the friction loss between workpieces can be reduced by times.

Optionally, a soft pad is arranged at the end part of the bolt, which is contacted with the sliding opening.

Through adopting above-mentioned technical scheme, at the cushion that sets up with the tip of sliding port contact, prevent that the bolt from making a round trip friction in the sliding port, reduce the wearing and tearing to the bolt.

The utility model provides a wear-resistant cavity structure of a vacuum pump, which has the following beneficial effects:

1. the utility model provides a wear-resistant cavity structure of a vacuum pump, wherein a groove is formed in the circumferential direction of an impeller, the impeller in the groove is connected with blades through springs, when the blades rub against the inner wall of a cylinder body, the springs shrink to reduce the friction between the cylinder body and the blades, in addition, sliding ports are formed on the two sides of the groove and on the impeller, and the blades are provided with corresponding bolts to prevent the blades in the groove from greatly swinging, so that the work of the vacuum pump is influenced;

2. according to the utility model, the arc-shaped screen plate is arranged in the cylinder body, the impeller is connected with the driving piece through the connecting component, the rotor is not arranged in the center of the impeller, and the friction between the impeller and the rotor is reduced.

Drawings

Fig. 1 is a schematic structural view of a wear-resistant cavity structure of a vacuum pump according to an embodiment of the present utility model.

Fig. 2 is a top view of a wear resistant cavity structure of a vacuum pump with a cylinder removed, according to an embodiment of the present utility model.

Fig. 3 is an enlarged view of a portion a in fig. 2.

Fig. 4 is an enlarged view of a portion B in fig. 2.

Fig. 5 is a schematic structural diagram of a connection assembly according to an embodiment of the present utility model.

Reference numerals illustrate: 1. a cylinder; 2. an impeller; 3. a groove; 4. an elastic pad; 5. a spring; 6. a blade; 7. a sliding port; 8. a plug pin; 9. a connection assembly; 91. a connecting shaft; 92 connection pads; 93. a connecting rod; 10. wear-resistant sleeve.

Detailed Description

The technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are one embodiment of the present utility model, not all other embodiments obtained by those skilled in the art without making creative efforts, and all other embodiments are within the scope of protection of the present utility model.

As shown in fig. 1-2, the embodiment of the utility model provides a wear-resistant cavity structure of a vacuum pump, which comprises a cylinder body 1, wherein the cylinder body 1 is in a volute shape, an impeller 2 is arranged in the cylinder body 1, a plurality of grooves 3 are circumferentially arranged on the impeller 2, springs 5 are connected to the inner walls of the grooves 3, the springs 5 are connected with blades 6, sliding ports 7 are arranged on two sides of the grooves 3 and on the impeller 2, bolts 8 matched with the sliding ports 7 are arranged on the blades 6, the impeller 2 is connected with a driving piece, and the impeller 2 is connected with the driving piece through a connecting component 9.

In order to reduce the wear to the spring 5, an elastic pad 4 is arranged between the inner wall of the groove 3 and the spring 5, in combination with fig. 3; in addition, the inner wall of the cylinder body 1 is provided with the wear-resistant sleeve 10, and the wear-resistant sleeve 10 is preferably made of wear-resistant gold steel, so that the wear-resistant sleeve has good wear resistance and small friction coefficient.

In order to prevent the vane 6 from swinging greatly in the rotation process, and thus the service life of the vane 6 is affected, sliding ports 7 are formed on both sides of the groove 3 and on the impeller 2, corresponding bolts 8 are arranged on the vane 6, and soft cushions are arranged at the end parts in contact with the sliding ports 7, so that the bolts 8 are prevented from rubbing back and forth in the sliding ports 7, and abrasion to the bolts 8 is reduced.

With reference to fig. 5, the conventional structure in which a rotor is disposed at the center of the impeller 2 is changed, and the impeller 2 is connected with a driving member through a connection assembly 9, wherein the connection assembly 9 includes a connection shaft 91, a connection disc 92, and a plurality of connection rods 93, one end of the connection disc 92 is connected with the connection shaft 91, and the other end of the connection shaft 91 is connected with the plurality of connection rods 93.

The implementation principle of the embodiment of the utility model is as follows: the impeller 2 is circumferentially provided with the groove 3, the impeller 2 in the groove 3 is connected with the blades 6 through the springs 5, when the blades 6 rub against the inner wall of the cylinder body 1, the springs 5 shrink to reduce the friction between the cylinder body 1 and the blades 6, in addition, sliding ports 7 are arranged on two sides of the groove 3 and on the impeller 2, corresponding bolts 8 are arranged on the blades 6 to prevent the blades 6 in the groove 3 from large swinging, so that the work of the vacuum pump is affected.

The cylinder 1 of the present utility model has a closed structure, and the closed structure is not shown for the sake of easy viewing of the internal structure.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims (6)

1. The utility model provides a wear-resisting cavity structure of vacuum pump, its characterized in that, including cylinder body (1), cylinder body (1) is the spiral case form, cylinder body (1) inside is provided with impeller (2), impeller (2) circumference is provided with a plurality of recess (3), a plurality of recess (3) inner wall connection has spring (5), spring (5) are connected with blade (6), recess (3) both sides just are located and are provided with sliding port (7) on impeller (2), be provided with on blade (6) bolt (8) with sliding port (7) adaptation, impeller (2) are connected with the driving piece through coupling assembling (9).

2. A wear-resistant cavity structure of a vacuum pump according to claim 1, characterized in that elastic pads (4) are arranged between the inner walls of a number of said grooves (3) and the springs (5).

3. The wear-resistant cavity structure of the vacuum pump according to claim 1, wherein the connecting assembly (9) comprises a connecting shaft (91), a connecting disc (92) and a plurality of connecting rods (93), one end of the connecting disc (92) is connected with the connecting shaft (91), and the other end of the connecting shaft (91) is connected with the plurality of connecting rods (93).

4. A wear-resistant cavity structure of a vacuum pump according to claim 1, characterized in that the inner wall of the cylinder (1) is provided with a wear-resistant sleeve (10).

5. A wear resistant cavity structure of a vacuum pump according to claim 4, characterized in that the wear resistant jacket (10) is made of wear resistant alloy steel.

6. A wear resistant cavity structure of a vacuum pump according to claim 1, characterized in that the end of the plug pin (8) in contact with the sliding port (7) is provided with a soft pad.