Roots blower rotor end face sealing structure

Abstract

The utility model belongs to the field of sealing structures, and particularly relates to a Roots blower rotor end face sealing structure which comprises a rotor, the outer side of the rotor is sleeved with a wear-resisting shell in a sliding mode, a sealing strip is embedded in the end face of the wear-resisting shell, the inner side of the wear-resisting shell is fixedly connected with a positioning block, and the positioning block is connected with the rotor in a clamping mode. A locking pin is slidably connected to the interior of the rotor, the locking pin is connected with the positioning block in an inserted mode, a first spring is arranged in the rotor, a shifting rod is fixedly connected to the tail section of a pin body of the locking pin, and a ball head is fixedly connected to the end, away from the locking pin, of the shifting rod. According to the utility model, the two wear-resistant shells are sleeved on the outer sides of the rotors, the wear-resistant shells can bear the mutual wear between the rotors, and the sealing strips are embedded into the end parts of the wear-resistant shells and are in contact with the end cover of the fan, so that the sealing performance between the end surfaces of the rotors and the end cover is improved, and the air leakage at the end surfaces is reduced.

Description

Technical Field

[0001] The utility model relates to the field of sealing structures, in particular to a Roots blower rotor end face sealing structure. Background Art

[0002] Roots blower is a commonly used centrifugal blower. It consists of two intermeshing impellers, driven by a motor to generate a high-speed rotating airflow. There is a certain gap between the two impellers of the Roots blower. When the rotor rotates, the gas is sucked in and compressed, and then discharged. This blower can provide high-pressure and large-volume airflow, and is widely used in ventilation, exhaust, transportation and other fields in industrial production. For example, the invention patent with application publication number CN1177063A proposes a Roots blower with excellent effect in reducing the noise generated during operation. The solution is to cut off the connection with the suction port from the top position of the blade at the front end of the rotation direction of a pair of rotors to the inner wall of the output port.

[0003] Since the rotor and the shell of the Roots blower move relative to each other, and in order to avoid interference or friction, there will be a gap between the end of the rotor and the end face of the shell cover, and the sealing performance here is poor, and there is air leakage. Therefore, it needs to be improved. Utility Model Content

[0004] The utility model aims to provide a Roots blower rotor end face sealing structure, which solves the problem of poor sealing between the end of the rotor and the end face of a shell cover.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a Roots blower rotor end face sealing structure, including a rotor, the outer side of the rotor is slidably sleeved with a wear-resistant shell, the end face of the wear-resistant shell is embedded with a sealing strip, the inner side of the wear-resistant shell is fixedly connected with a positioning block, and the positioning block is clamped with the rotor, the inside of the rotor is slidably connected with a locking pin, the locking pin is plugged into the positioning block, a spring is arranged inside the rotor, the end section of the pin body of the locking pin is fixedly connected with a lever, and the end of the lever away from the locking pin is fixedly connected with a ball head.

[0006] Preferably, there are two wear-resistant shells, and the two wear-resistant shells are in conflict with each other. The wear-resistant shells can be arranged to bear the wear between the rotors.

[0007] Preferably, one end of the spring 1 is fixedly connected to the locking pin, and the other end of the spring 1 is fixedly connected to the inner surface of the rotor. By setting the spring 1, the elastic force can be applied to the locking pin.

[0008] Preferably, a buckle cover is slidably connected to the inside of the rotor, and the buckle cover contacts the ball head, a sleeve is fixedly connected to the inner wall of the buckle cover, a limit pin is slidably connected to the inner side of the sleeve, the limit pin contacts both the lever and the ball head, and a second spring is arranged on the inner side of the sleeve. The arrangement of the limit pin has a limiting effect on the lever and the locking pin.

[0009] Preferably, the buckle cover is in a square box shape and is made of rubber. The buckle cover has a blocking effect on the sliding space of the lever.

[0010] Preferably, one end of the second spring is fixedly connected to the limit pin, and the other end of the second spring is fixedly connected to the inner surface of the sleeve. By setting the second spring, the elastic force can be applied to the limit pin.

[0011] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0012] The utility model sleeves two wear-resistant shells on the outer side of the rotor, the wear-resistant shells can bear the mutual wear between the rotors, and the ends of the wear-resistant shells are embedded with sealing strips, which are in contact with the end cover of the fan, thereby improving the sealing between the end face of the rotor and the end cover and reducing the amount of air leakage at the end face. At the same time, a positioning block is provided on the inner side of the wear-resistant shell for positioning the wear-resistant shell on the rotor, and a locking pin that is retracted and extended by a spring is provided inside the rotor, and the locking pin is inserted into the positioning block under the elastic force of the spring. In this way, the wear-resistant shell can be disassembled and replaced by controlling the clutch between the locking pin and the positioning block. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a three-dimensional diagram of the overall structure of the utility model;

[0014] Figure 2 For the utility model Figure 1 A side cross-sectional view of

[0015] Figure 3 For the utility model Figure 2 A-section structure enlarged view.

[0016] In the figure: 1. rotor; 2. wear-resistant shell; 3. sealing strip; 4. positioning block; 5. locking pin; 6. spring 1; 7. lever; 8. ball head; 9. buckle cover; 10. sleeve; 11. limit pin; 12. spring 2. DETAILED DESCRIPTION

[0017] 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.

[0018] See also Figure 1-3 The rotor end face sealing structure of the Roots blower includes a rotor 1, and a wear-resistant shell 2 is slidably sleeved on the outer side of the rotor 1. There are two wear-resistant shells 2, and the two wear-resistant shells 2 are in conflict with each other. The wear-resistant shell 2 can bear the wear between the rotors 1. The end face of the wear-resistant shell 2 is embedded with a sealing strip 3. The inner side of the wear-resistant shell 2 is fixedly connected with a positioning block 4, and the positioning block 4 is clamped with the rotor 1. The inside of the rotor 1 is slidably connected with a locking pin 5, and the locking pin 5 is plugged with the positioning block 4. A spring 6 is arranged inside the rotor 1, one end of the spring 6 is fixedly connected with the locking pin 5, and the other end of the spring 6 is fixedly connected to the inner surface of the rotor 1. The setting of the spring 6 can apply elastic force to the locking pin 5. The end of the pin body of the locking pin 5 is fixedly connected with a lever 7, and the end of the lever 7 away from the locking pin 5 is fixedly connected with a ball head 8.

[0019] See also Figure 3 , the inside of the rotor 1 is slidably connected with a buckle cover 9, and the buckle cover 9 is in conflict with the ball head 8. The inner wall of the buckle cover 9 is fixedly connected with a sleeve 10. The inner side of the sleeve 10 is slidably connected with a limit pin 11. The limit pin 11 is in conflict with both the lever 7 and the ball head 8. A spring 2 12 is arranged on the inner side of the sleeve 10. Through the arrangement of the limit pin 11, a limiting effect is exerted on the lever 7 and the locking pin 5. The buckle cover 9 is square box-shaped and made of rubber. Through the arrangement of the buckle cover 9, a blocking effect is exerted on the sliding space of the lever 7. One end of the spring 2 12 is fixedly connected to the limit pin 11, and the other end of the spring 2 12 is fixedly connected to the inner surface of the sleeve 10. Through the arrangement of the spring 2 12, the elastic force can be applied to the limit pin 11.

[0020] The specific implementation process of the utility model is as follows: when in use, first pull the locking pin 5 through the lever 7 to make the locking pin 5 retract and compress the spring 1 6, then keep the state of the locking pin 5, and put the wear-resistant shell 2 on the outside of the rotor 1, and the wear-resistant shell 2 is positioned on the rotor 1 through the positioning block 4, then release the lever 7, and the locking pin 5 is inserted into the positioning block 4 under the elastic force of the spring 1 6, so that the installation of one of the wear-resistant shells 2 is completed, and then the other wear-resistant shell 2 is installed in the same way, and then the buckle cover 9 is buckled into the end face of the rotor 1, and the limit pin 11 penetrates into the rotor 1 under the action of the spring 12, and contacts the junction of the lever 7 and the ball head 8, and finally the sealing strip 3 is embedded in the end face of the wear-resistant shell 2. The wear-resistant shell 2 can bear the mutual wear between the rotor 1, and the sealing strip 3 embedded in the end of the wear-resistant shell 2 contacts the end cover of the fan, thereby improving the sealing between the end face of the rotor 1 and the end cover, and reducing the amount of air leakage at the end face.

[0021] 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 that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A Roots blower rotor end face sealing structure, comprising a rotor (1), characterized in that: The outer side of the rotor (1) is slidably sleeved with a wear-resistant shell (2), the end surface of the wear-resistant shell (2) is embedded with a sealing strip (3), the inner side of the wear-resistant shell (2) is fixedly connected with a positioning block (4), and the positioning block (4) is snap-fitted with the rotor (1), the interior of the rotor (1) is slidably connected with a locking pin (5), the locking pin (5) is plugged with the positioning block (4), a spring (6) is arranged inside the rotor (1), the pin body end section of the locking pin (5) is fixedly connected with a lever (7), and the end of the lever (7) away from the locking pin (5) is fixedly connected with a ball head (8).

2. The Roots blower rotor end face sealing structure according to claim 1, characterized in that: The number of the wear-resistant shells (2) is two, and the two wear-resistant shells (2) conflict with each other.

3. The Roots blower rotor end face sealing structure according to claim 1, characterized in that: One end of the spring one (6) is fixedly connected to the locking pin (5), and the other end of the spring one (6) is fixedly connected to the inner surface of the rotor (1).

4. The Roots blower rotor end face sealing structure according to claim 1, characterized in that: The rotor (1) is internally slidably connected with a buckle cover (9), and the buckle cover (9) contacts the ball head (8). The inner wall of the buckle cover (9) is fixedly connected with a sleeve (10). The inner side of the sleeve (10) is slidably connected with a limit pin (11), and the limit pin (11) contacts both the lever (7) and the ball head (8). A second spring (12) is arranged on the inner side of the sleeve (10).

5. The Roots blower rotor end face sealing structure according to claim 4, characterized in that: The buckle cover (9) is in a square box shape and is made of rubber.

6. The Roots blower rotor end face sealing structure according to claim 4, characterized in that: One end of the second spring (12) is fixedly connected to the limiting pin (11), and the other end of the second spring (12) is fixedly connected to the inner surface of the sleeve (10).

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