Shaft sleeve structure of multi-stage pump

Abstract

The utility model relates to the technical field of shaft sleeves, in particular to a shaft sleeve structure of a multistage pump, which comprises a shaft sleeve, mounting grooves are arranged at two ends of the inner surface of the shaft sleeve, extrusion components are movably arranged at two ends of the shaft sleeve, each extrusion component comprises extrusion rings movably arranged at two ends of the shaft sleeve, and threaded grooves are arranged on the outer surfaces of the extrusion rings. Threads are fixedly arranged on the surface of the inner side of the mounting groove, and a limiting assembly is movably arranged on one side of the extrusion ring. According to the utility model, the shaft sleeve is mounted on the shaft, the sealing ring sleeve is expanded and sleeved on the shaft, and then the sealing ring is extruded by the extrusion ring, so that the sealing ring is attached to the shaft, the sealing performance of the sealing ring and the shaft is improved, and the problem that the shaft sleeve is adhered to the shaft and is difficult to disassemble due to corrosive substances or pollutants entering between the shaft and the shaft sleeve is avoided; meanwhile, the abrasion of the shaft sleeve is prevented from being aggravated by pollutants, the service life of the shaft sleeve is prolonged, the sealing ring can be quickly disassembled and replaced by rotating the extrusion ring after the sealing ring is damaged, and the disassembling difficulty of the sealing ring is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of shaft sleeves, in particular to a shaft sleeve structure of a multi-stage pump. Background Art

[0002] As a part of the pump rotor, the shaft sleeve plays an important role in replacing the shaft to bear torque and protect the shaft during the operation of the multi-stage pump rotor. When installing the shaft sleeve, a sealing ring needs to be installed between the shaft and the shaft sleeve to prevent corrosive substances or contaminants from entering between the shaft and the shaft sleeve.

[0003] When installing existing sealing rings, they are usually put directly on the shaft after the sleeve is installed, and then inserted between the sleeve and the shaft. However, the sealing ring will twist during installation and sliding, which can easily reduce the sealing performance between the shaft and the sleeve, causing corrosive substances or contaminants to enter between the shaft and the sleeve, making the sleeve adhere to the shaft and difficult to remove. The contaminants will also aggravate the wear of the sleeve and reduce the service life of the sleeve. Utility Model Content

[0004] The purpose of the present utility model is to provide a shaft sleeve structure of a multi-stage pump to solve the problems raised in the above background technology.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] A shaft sleeve structure for a multi-stage pump includes a shaft sleeve, mounting grooves are provided at both ends of the inner surface of the shaft sleeve, extrusion components are movably provided at both ends of the shaft sleeve, the extrusion components include extrusion rings movably provided at both ends of the shaft sleeve, thread grooves are provided on the outer surface of the extrusion ring, threads are fixedly provided on the inner surface of the mounting groove, and a limit assembly is movably provided on one side of the extrusion ring.

[0007] Furthermore, the extrusion ring is screwed and connected with the adjacent threads through the thread groove.

[0008] Furthermore, a sealing ring is movably embedded in the installation groove.

[0009] Furthermore, an extrusion groove is provided at one end of the inner surface of the extrusion ring, and an oblique angle is provided at the connection between the inner surface of the extrusion groove and the other side surface of the extrusion ring.

[0010] Furthermore, a plurality of auxiliary blocks are fixedly mounted at equal angles on one side surface of the extrusion ring, and a plurality of limiting grooves are opened at equal angles on both ends of the outer surface of the sleeve.

[0011] Preferably: the limiting assembly includes limiting rings symmetrically and movably arranged at both ends of the sleeve, a plurality of auxiliary holes are opened at equal angles on the outer surface of the limiting ring, a plurality of limiting blocks are fixedly installed at equal angles on one side surface of the limiting ring, and the limiting blocks are movably plugged into adjacent limiting grooves.

[0012] Preferably, a plurality of slots are provided at equal angles on one side of the inner surface of the limiting ring, and the auxiliary block is movably connected to adjacent slots.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] 1. By twisting the extrusion ring, the extrusion ring is screwed into the installation groove under the screw connection of the thread groove and the thread. Under the guidance of the bevel, the extrusion groove squeezes the outside of the sealing ring, and the sealing ring is squeezed into the space between the extrusion groove, the installation groove and the shaft to seal the shaft and the sleeve. By first installing the sleeve on the shaft and then squeezing the sealing ring through the extrusion ring, the sealing ring fits the shaft, thereby increasing the sealing performance of the two, avoiding corrosive substances or pollutants from entering between the shaft and the sleeve, causing the sleeve to adhere to the shaft and be difficult to remove, and at the same time avoiding pollutants from aggravating the wear of the sleeve, thereby increasing the service life of the sleeve.

[0015] 2. By twisting the auxiliary blocks at different positions, the extrusion ring is easier to rotate. After the extrusion ring is installed in place, the auxiliary blocks are against the shaft sleeve, making the installation of the extrusion ring more intuitive.

[0016] 3. After the extrusion ring is installed, slide the limit ring so that multiple limit blocks are inserted into the limit grooves at corresponding positions and fixed by the friction between the two. At the same time, multiple auxiliary blocks are inserted into the card slots at different positions and fixed by the friction between the two. Therefore, through the above two sets of plug-in methods, the extrusion ring is prevented from rotating on its own, the stability of its connection is improved, and the extrusion ring is easy to disassemble. After the sealing ring is damaged, the sealing ring can be quickly disassembled and replaced by rotating the extrusion ring, reducing the difficulty of disassembling the sealing ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the split structure of the shaft sleeve, extrusion assembly and limit assembly in the utility model;

[0019] Figure 3 This is a schematic diagram of the vertical cross-section structure of the connection between the shaft sleeve and the extrusion assembly in the utility model;

[0020] Figure 4 It is a schematic structural diagram of the oblique section of the connection between the shaft sleeve and the extrusion assembly in the utility model.

[0021] In the figure: 1. Bushing; 101. Mounting groove; 102. Thread; 103. Limiting groove; 104. Sealing ring; 2. Extrusion assembly; 201. Extrusion ring; 202. Threaded groove; 203. Extrusion groove; 204. Auxiliary block; 205. Bevel; 3. Limiting assembly; 301. Limiting ring; 302. Slot; 303. Limiting block; 304. Auxiliary hole. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] See also Figures 1 to 4 In an embodiment of the present invention, a shaft sleeve structure of a multi-stage pump includes a shaft sleeve 1. Mounting grooves 101 are provided at both ends of the inner surface of the shaft sleeve 1. Extrusion components 2 are movably provided at both ends of the shaft sleeve 1. The extrusion components 2 include extrusion rings 201 movably provided at both ends of the shaft sleeve 1. A threaded groove 202 is provided on the outer surface of the extrusion ring 201. A thread 102 is fixedly provided on the inner surface of the mounting groove 101. A limiting component 3 is movably provided on one side of the extrusion ring 201.

[0024] Specifically, the sealing ring 104 is fastened to the two ends of the inside of the sleeve 1 through the extrusion component 2, so that the sealing ring 104 is squeezed into the space between the extrusion groove 203, the installation groove 101 and the shaft, thereby sealing the shaft and the sleeve 1. Then, two limiting components 3 are clamped at both ends of the sleeve 1 to clamp the extrusion component 2 between the sleeve 1 and the limiting ring 301 for fixation, thereby preventing the extrusion component 2 from rotating and improving its stability.

[0025] Example 1

[0026] like Figure 2-4 As shown, in this embodiment, the extrusion ring 201 is screwed together with the adjacent thread 102 through the thread groove 202; a sealing ring 104 is movably embedded and installed inside the installation groove 101; an extrusion groove 203 is provided at one end of the inner surface of the extrusion ring 201, and an oblique angle 205 is provided at the connection between the inner surface of the extrusion groove 203 and the other side surface of the extrusion ring 201.

[0027] In this embodiment, a limiting component 3 and an extrusion component 2 are first sleeved on the shaft, a sealing ring 104 is stretched and sleeved on the shaft, and then the shaft sleeve 1 is installed, and then another sealing ring 104, the extrusion component 2 and the limiting component 3 are installed in sequence, and the two sealing rings 104 are inserted into the mounting grooves 101 at both ends of the shaft sleeve 1, and the extrusion component 2 is screwed. Through the screwing of the thread groove 202 and the thread 102, the extrusion ring 201 is screwed into the mounting groove 101. Under the action of the bevel 205, the extrusion groove 203 is squeezed. The outer side of the sealing ring 104 is pressed and squeezed into the space between the extrusion groove 203, the installation groove 101 and the shaft to seal the shaft and the sleeve 1. The sleeve 1 is first installed on the shaft and then the sealing ring 104 is squeezed by the extrusion ring 201 to make the sealing ring 104 fit the shaft, thereby increasing the sealing performance of the two, avoiding corrosive substances or pollutants from entering between the shaft and the sleeve 1, causing the sleeve 1 to adhere to the shaft and be difficult to remove, and at the same time avoiding pollutants from aggravating the wear of the sleeve 1, thereby increasing the service life of the sleeve 1.

[0028] like Figure 2 As shown, in this embodiment, a plurality of auxiliary blocks 204 are fixedly mounted at equal angles on one side surface of the extrusion ring 201, and a plurality of limiting grooves 103 are opened at equal angles at both ends of the outer surface of the sleeve 1.

[0029] In specific implementation, by twisting the auxiliary blocks 204 at different positions, the extrusion ring 201 is easier to rotate. After the extrusion ring 201 is installed in place, the auxiliary blocks 204 are against the sleeve 1, making the installation of the extrusion ring 201 more intuitive.

[0030] Example 2

[0031] On the basis of the first embodiment, in order to make up for the problem that the extrusion ring 201 in the first embodiment is easy to rotate and loosen under the drive of the shaft.

[0032] like Figure 4 As shown, in this embodiment, the limit assembly 3 includes a limit ring 301 symmetrically and movably arranged at both ends of the sleeve 1, a plurality of auxiliary holes 304 are opened at equal angles on the outer surface of the limit ring 301, a plurality of limit blocks 303 are fixedly installed at equal angles on one side surface of the limit ring 301, and the limit blocks 303 are movably connected with adjacent limit grooves 103; a plurality of card grooves 302 are opened at equal angles on one side of the inner surface of the limit ring 301, and the auxiliary blocks 204 are movably connected with adjacent card grooves 302.

[0033] During specific implementation, after the extrusion ring 201 is installed, the sliding limit ring 301 is used to insert multiple limit blocks 303 into the limit grooves 103 at corresponding positions, and fix them by the friction between the two. At the same time, multiple auxiliary blocks 204 are inserted into the card slots 302 at different positions, and fix them by the friction between the two. Therefore, through the above two sets of plug-in methods, the extrusion ring 201 is prevented from rotating on its own, and the stability of its connection is improved. At the same time, the extrusion ring 201 is easy to disassemble, and then after the sealing ring 104 is damaged, the sealing ring 104 can be quickly disassembled and replaced by rotating the extrusion ring 201, thereby reducing the difficulty of disassembling the sealing ring 104.

[0034] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0035] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A shaft sleeve structure for a multistage pump, comprising a shaft sleeve (1), characterized in that: Mounting grooves (101) are provided at both ends of the inner surface of the shaft sleeve (1), and extrusion assemblies (2) are movably provided at both ends of the shaft sleeve (1). The extrusion assemblies (2) include extrusion rings (201) movably provided at both ends of the shaft sleeve (1), a thread groove (202) is provided on the outer surface of the extrusion ring (201), and a thread (102) is fixedly provided on the inner surface of the mounting groove (101), and a limiting assembly (3) is movably provided on one side of the extrusion ring (201).

2. The shaft sleeve structure of a multi-stage pump according to claim 1, characterized in that: The extrusion ring (201) is screwed and connected to the adjacent thread (102) via the thread groove (202).

3. The shaft sleeve structure of a multi-stage pump according to claim 1, characterized in that: A sealing ring (104) is movably embedded and installed inside the installation groove (101).

4. The shaft sleeve structure of a multi-stage pump according to claim 1, characterized in that: An extrusion groove (203) is provided at one end of the inner surface of the extrusion ring (201), and an oblique angle (205) is provided at the connection between the inner surface of the extrusion groove (203) and the other side surface of the extrusion ring (201).

5. The shaft sleeve structure of a multi-stage pump according to claim 1, characterized in that: A plurality of auxiliary blocks (204) are fixedly mounted at equal angles on one side surface of the extrusion ring (201), and a plurality of limiting grooves (103) are opened at equal angles at both ends of the outer surface of the shaft sleeve (1).

6. The shaft sleeve structure of a multi-stage pump according to claim 5, characterized in that: The limiting assembly (3) comprises limiting rings (301) symmetrically and movably arranged at both ends of the shaft sleeve (1); a plurality of auxiliary holes (304) are provided on the outer surface of the limiting ring (301) at equal angles; a plurality of limiting blocks (303) are fixedly installed on one side surface of the limiting ring (301) at equal angles; the limiting blocks (303) are movably plugged into adjacent limiting grooves (103).

7. The shaft sleeve structure of a multi-stage pump according to claim 6, characterized in that: A plurality of slots (302) are provided at equal angles on one side of the inner surface of the limiting ring (301), and the auxiliary block (204) is movably plugged into adjacent slots (302).

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