Negative-pressure-resistant compressor impeller

Abstract

The utility model relates to the technical field of impellers, and discloses an anti-negative-pressure compressor impeller which comprises an impeller body, blades are fixedly connected to the outer wall of the impeller body, a fixing cover is welded to one end of the impeller body, a circular groove is formed in the outer wall of the fixing cover, a base is welded to the inner wall of the circular groove, and the impeller body is fixedly connected with the base. A spring is fixedly connected to the outer wall of the base, a round head is fixedly connected to one end of the spring, a fixing bolt is arranged on the inner wall of the fixing cover, a main shaft is detachably connected to the inner wall of the fixing cover, and a threaded hole is formed in the outer wall of the main shaft. According to the negative-pressure-resistant compressor impeller, the threaded hole is formed in the main shaft, the main shaft can be conveniently fixed through the fixing bolt, the round head abuts against the head of the fixing bolt through the elastic force of the spring, the fixing bolt is not prone to loosening in the long-time using process, stability is enhanced, and the requirements of people are met; and the air inlet and the air outlet are formed, so that the negative pressure resistance is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of impellers, in particular to a negative pressure resistant compressor impeller. Background Art

[0002] As a mechanical device for compressing gas, compressor is widely used in many fields such as industry, aerospace, refrigeration, and automobile. During the operation of the compressor, the impeller is its core component, and its performance has a decisive influence on the operating efficiency and stability of the entire equipment.

[0003] The prior art patent document with publication number CN213540829U provides an impeller fixing mechanism, which provides a connecting portion in the middle of the impeller and uses a fixing member to fix the impeller to the main shaft, so that the overall impeller fixing mechanism has a simple structure, can effectively prevent the impeller from rotating relative to the main shaft, and is also easy to process and produce.

[0004] Although the above-mentioned prior art fixes the main shaft in the impeller by bolts, the bolts will loosen during long-term use, affecting the fixation of the impeller, which is easy to affect the normal operation of the impeller. The bolts cannot be tightened well to prevent loosening and cannot meet people's needs. Therefore, we need an anti-negative pressure compressor impeller. Utility Model Content

[0005] The purpose of the utility model is to provide a negative pressure resistant compressor impeller to solve the problems raised in the above background technology.

[0006] In order to solve the above technical problems, the utility model provides the following technical solutions: a negative pressure resistant compression impeller, comprising an impeller body, a blade is fixedly connected to the outer wall of the impeller body, and a fixing cover is welded to one end of the impeller body, a circular groove is provided on the outer wall of the fixing cover, and a base is welded to the inner wall of the circular groove, a spring is fixedly connected to the outer wall of the base, and a round head is fixedly connected to one end of the spring, a fixing bolt is provided on the inner wall of the fixing cover, and a main shaft is detachably connected to the inner wall of the fixing cover, a threaded hole is provided on the outer wall of the main shaft, an air inlet hole is provided at one end of the impeller body, and an air inlet channel is provided inside the impeller body, and an air outlet hole is provided on the outer wall of the impeller body.

[0007] Preferably, the base forms an elastic structure through a spring and a round head, and the spring is arranged between the base and the round head.

[0008] Preferably, the fixing cover forms a sliding structure through the circular groove and the round head, and the outer wall of the round head fits with the inner wall of the circular groove.

[0009] Preferably, the fixing cover forms a fixing structure with the main shaft through a fixing bolt, and one end of the fixing bolt extends into the threaded hole for connection.

[0010] Preferably, there are multiple fixing bolts, and the multiple fixing bolts are arranged in the fixing cover at equal distances.

[0011] Preferably, there are multiple air outlet holes, and the multiple air outlet holes are arranged on the impeller body at equal distances.

[0012] Preferably, the number of the air outlet holes corresponds to the number of the air inlet holes.

[0013] Compared with the prior art, the beneficial effects achieved by the utility model are:

[0014] The utility model provides a threaded hole on the main shaft, which is convenient for fixing the main shaft with a fixing bolt. The round head is pressed against the head of the fixing bolt by the elastic force of the spring, so that the fixing bolt is not easy to loosen during long-term use, thereby enhancing stability and meeting people's needs. The air inlet and the air outlet are provided to improve the performance of resisting negative pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the impeller body and main shaft structure of the utility model;

[0017] Figure 3 This is a schematic diagram of the fixed cover and the main shaft structure of the utility model;

[0018] Figure 4 For this utility model Figure 2 Enlarged structural diagram at A in the middle.

[0019] Among them: 1. impeller; 2. blades; 3. fixed cover; 4. round groove; 5. base; 6. spring; 7. round head; 8. fixing bolt; 9. main shaft; 10. threaded hole; 11. air inlet; 12. air inlet channel; 13. air outlet. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] See also Figure 1 , Figure 2 , Figure 3 and Figure 4A negative pressure resistant impeller comprises an impeller body 1, a blade 2 is fixedly connected to the outer wall of the impeller body 1, and a fixing cover 3 is welded to one end of the impeller body 1, a circular groove 4 is provided on the outer wall of the fixing cover 3, and a base 5 is welded to the inner wall of the circular groove 4, a spring 6 is fixedly connected to the outer wall of the base 5, and a round head 7 is fixedly connected to one end of the spring 6, a fixing bolt 8 is provided on the inner wall of the fixing cover 3, and a main shaft 9 is detachably connected to the inner wall of the fixing cover 3, a threaded hole 10 is provided on the outer wall of the main shaft 9, an air inlet hole 11 is provided at one end of the impeller body 1, and an air inlet channel 12 is provided inside the impeller body 1, and an air outlet hole 13 is provided on the outer wall of the impeller body 1.

[0022] Through the above technical solution, by opening a threaded hole 10 on the main shaft 9, it is convenient to use the fixing bolt 8 to fix the main shaft 9, and the round head 7 is pressed against the head of the fixing bolt 8 by the elastic force of the spring 6, so that the fixing bolt 8 is not easy to loosen during long-term use, thereby enhancing stability and meeting people's needs. The performance of resisting negative pressure is improved by opening the air inlet 11 and the air outlet 13.

[0023] Specifically, the base 5 forms an elastic structure through the spring 6 and the round head 7, and the spring 6 is arranged between the base 5 and the round head 7.

[0024] Through the above technical solution, the connection effect between the base 5, the spring 6 and the round head 7 is strengthened. The round head 7 is pressed against the head of the fixing bolt 8 by the elastic force of the spring 6, so that the fixing bolt 8 is not easy to loosen during long-term use, thereby enhancing stability.

[0025] Specifically, the fixed cover 3 forms a sliding structure with the round head 7 through the circular groove 4 , and the outer wall of the round head 7 fits with the inner wall of the circular groove 4 .

[0026] Through the above technical solution, the connection effect between the fixed cover 3 and the circular groove 4 and the round head 7 is strengthened, so that the round head 7 can move well in the circular groove 4, and the stability of the movement of the round head 7 is strengthened.

[0027] Specifically, the fixing cover 3 forms a fixing structure with the main shaft 9 through the fixing bolt 8, and one end of the fixing bolt 8 extends into the threaded hole 10 for connection.

[0028] The above technical solution strengthens the connection between the fixing cover 3 and the fixing bolts 8 and the main shaft 9 . The threaded holes 10 are provided on the main shaft 9 to facilitate the fixing bolts 8 to fix the main shaft 9 in the fixing cover 3 .

[0029] Specifically, there are multiple fixing bolts 8 , and the multiple fixing bolts 8 are arranged in the fixing cover 3 at equal distances.

[0030] Through the above technical solution, by providing a plurality of fixing bolts 8, the main shaft 9 can be well fixed, thereby enhancing the fixing effect.

[0031] Specifically, there are a plurality of air outlet holes 13 , and the plurality of air outlet holes 13 are arranged on the impeller body 1 at equal distances; the number of the air outlet holes 13 corresponds to the number of the air inlet holes 11 .

[0032] Through the above technical solution, by providing a plurality of air inlet holes 11 and air outlet holes 13 , gas can enter the air inlet channel 12 from the air inlet holes 11 and exit from the air outlet holes 13 .

[0033] When in use, first fix the main shaft 9, align the inner wall of the impeller body 1 with the main shaft 9, push the impeller body 1 to install it on the main shaft 9, and one end of the main shaft 9 extends into the fixing cover 3 to pass through. The main shaft 9 is fixed by using the fixing bolt 8, and the end of the fixing bolt 8 extends into the threaded hole 10 for threaded connection. During the process of the fixing bolt 8 extending, the outer wall of the fixing bolt 8 squeezes the round head 7, so that the round head 7 moves in the circular groove 4. The movement of the round head 7 causes the spring 6 to deform and shrink, and the spring 6 rebounds to move the round head 7. The round head 7 is pressed against the head of the fixing bolt 8 by the elastic force of the spring 6, so that the fixing bolt 8 is not easy to loosen during long-term use, thereby enhancing stability and meeting people's needs. By providing an air inlet 11 and an air outlet 13, when the pressure When the compressor faces a negative pressure environment, the air inlet 11 can allow external gas to enter the impeller body 1, thereby alleviating the direct effect of negative pressure on the impeller body 1 to a certain extent and reducing the risk of deformation or damage of the impeller due to negative pressure. Through the design of the air outlet 13, when the impeller body 1 is rotating, the gas entering the air inlet channel 12 through the air inlet 11 can be discharged from the air outlet 13 under the action of centrifugal force and enter other parts of the compressor such as the back cavity. The pressure in the back cavity will increase, forming a positive pressure difference with the bearing body cavity, which helps to enhance the overall structural stability of the compressor and improve its ability to resist negative pressure. This completes all the work. The content not described in detail in this specification belongs to the prior art known to professional and technical personnel in this field.

[0034] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A negative pressure resistant compressor impeller, comprising an impeller body (1), characterized in that: The outer wall of the impeller body (1) is fixedly connected with a blade (2), and a fixing cover (3) is welded to one end of the impeller body (1), a circular groove (4) is provided on the outer wall of the fixing cover (3), and a base (5) is welded to the inner wall of the circular groove (4), a spring (6) is fixedly connected to the outer wall of the base (5), and a round head (7) is fixedly connected to one end of the spring (6), a fixing bolt (8) is provided on the inner wall of the fixing cover (3), and a main shaft (9) is detachably connected to the inner wall of the fixing cover (3), and a threaded hole (10) is provided on the outer wall of the main shaft (9), an air inlet hole (11) is provided on one end of the impeller body (1), and an air inlet channel (12) is provided inside the impeller body (1), and an air outlet hole (13) is provided on the outer wall of the impeller body (1).

2. The negative pressure resistant impeller according to claim 1, characterized in that: The base (5) forms an elastic structure through a spring (6) and a round head (7), and the spring (6) is arranged between the base (5) and the round head (7).

3. The negative pressure resistant impeller according to claim 1, characterized in that: The fixed cover (3) forms a sliding structure with the circular groove (4) and the round head (7), and the outer wall of the round head (7) fits with the inner wall of the circular groove (4).

4. The negative pressure resistant impeller according to claim 1, characterized in that: The fixing cover (3) forms a fixing structure with the main shaft (9) through a fixing bolt (8), and one end of the fixing bolt (8) extends into the threaded hole (10) for connection.

5. The negative pressure resistant impeller according to claim 4, characterized in that: The number of the fixing bolts (8) is multiple, and the multiple fixing bolts (8) are arranged in the fixing cover (3) at equal distances.

6. The negative pressure resistant impeller according to claim 1, characterized in that: The number of the air outlet holes (13) is multiple, and the multiple air outlet holes (13) are arranged on the impeller body (1) at equal distances.

7. The negative pressure resistant impeller according to claim 6, characterized in that: The number of the air outlet holes (13) corresponds to the number of the air inlet holes (11).

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