Centrifugal pump shaft sleeve structure

Abstract

The utility model relates to centrifugal pump shaft sleeve technical field provides a centrifugal pump shaft sleeve structure, including the shaft sleeve and protection structure, the outside fixed shoulder of shaft sleeve top, the inside fixed sealing structure of shaft sleeve, the outside installation of shaft sleeve has the protection structure. The utility model discloses through being provided with, through the shaft sleeve adopts carbon steel plating hard chromium material to make, has higher hardness and wear resistance, through locking screw locking nut and press tightly fixed bushing outside the shaft sleeve, and then has guaranteed bushing and the shaft sleeve close connection, also convenient for the bushing to be dismantled to the part of wear -resistant bushing of convenient replacement, reduce the cost, can also strengthen the wear resistance and corrosion resistance of shaft sleeve through bushing simultaneously, prolongs the service life of shaft sleeve.

Description

Technical Field

[0001] This utility model relates to the field of centrifugal pump shaft sleeve technology, and in particular to a centrifugal pump shaft sleeve structure. Background Technology

[0002] Centrifugal pumps, widely used in fluid transport in industries such as chemical, petroleum, metallurgy, and power, have a core component called the shaft sleeve. The main function of the shaft sleeve is to protect the pump shaft from media corrosion, wear, and mechanical damage, while ensuring stable pump operation. A centrifugal pump shaft sleeve structure is described below.

[0003] To address this, patent CN209586762U discloses a centrifugal pump bushing, belonging to the field of centrifugal pump technology. It includes a bushing body with a concave groove structure in the center of the shaft hole for reducing bubble accumulation. A ring of protrusions extends radially outward from the outer circumference of the bushing body. A cylindrical support is fixedly connected to the end face of the bushing body. The bushing body comprises a metal inner layer and a plastic outer layer. This invention provides a centrifugal pump bushing made of composite material, enhancing its strength and rigidity. The groove structure in the center of the shaft hole allows bubbles to accumulate within the groove structure, reducing surface bubble accumulation, extending the bushing's service life, improving its reliability, and ensuring stable operation.

[0004] The centrifugal pump bushing mentioned above is made of composite material, including a metal inner layer and a plastic outer layer. Although this can improve rigidity, the plastic outer layer is prone to aging and deformation under high wear or high temperature conditions, and its wear resistance is insufficient. This makes it difficult to protect the bushing body, thus reducing the service life of the bushing body. Furthermore, it is not convenient to disassemble only the worn parts, so the entire bushing needs to be replaced, which increases the cost. Utility Model Content

[0005] The purpose of this invention is to provide a centrifugal pump shaft sleeve structure to solve the problem of insufficient wear resistance in existing centrifugal pump shaft sleeve structures.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a centrifugal pump shaft sleeve structure, including a shaft sleeve and a protective structure;

[0007] A shoulder is fixed to the outer side of the top end of the bushing, and a sealing structure is fixed inside the bushing;

[0008] A protective structure is installed on the outer side of the bushing. The protective structure includes a bushing installed on the outer side of the bushing. A mounting ring is fixed at the top of the bushing. A mounting hole is provided inside the mounting ring. A locking screw is installed inside the mounting hole. A mounting groove is provided inside the bottom of the bushing. An annular cover is installed inside the mounting groove. A locking nut is installed on the outer side of the bushing at one end of the annular cover. A wear-resistant layer is provided on the outer side of the bushing. An anti-corrosion layer is provided on the inner side of the bushing.

[0009] Preferably, the sealing structure includes a reinforcing block fixed to the top of the inner end of the bushing, a keyway is provided on one side of the reinforcing block, an annular groove is provided inside the bushing at the bottom end of the reinforcing block, a sealing ring is installed inside the annular groove, and an interference groove is provided inside the bushing.

[0010] Preferably, the reinforcing block is a ceramic ring, the sealing ring is "O" shaped, and the sealing ring is made of rubber.

[0011] With the above structure, the wear resistance of the bushing is enhanced by the reinforcing block when the pump shaft rotates, thereby reducing the wear of the bushing.

[0012] Preferably, the bushing is made of carbon steel plated with hard chrome, and the bottom end of the shoulder is provided with threaded holes corresponding to the mounting rings. The locking screw and the shoulder are connected by threads through the threaded holes.

[0013] The above structure facilitates the fixing of the mounting ring to the shaft shoulder during use, forming a threaded connection and ensuring a stable bushing installation.

[0014] Preferably, the mounting holes are evenly spaced inside the mounting ring, the annular cap is made of carbon steel, the outer side of the bushing is provided with an external thread that matches the inside of the locking nut, and the bushing and the locking nut are threadedly connected.

[0015] With the above structure, during use, the bushing is pressed and fixed by the locking nut engaging with the external thread of the bushing, ensuring a tight connection between the bushing and the bushing.

[0016] Preferably, the bushing is made of tungsten carbide, the wear-resistant layer is a metal-ceramic composite coating, and the anti-corrosion layer is made of polytetrafluoroethylene.

[0017] The above structure further enhances the wear resistance and corrosion resistance of the bushing during use, thus extending its service life.

[0018] The centrifugal pump shaft sleeve structure provided by this utility model has the following advantages:

[0019] The pump shaft is installed inside the keyway by a sealing structure, with a ceramic ring as the reinforcing block, which is fixed to the top of the shaft sleeve. This enhances the wear resistance. The sealing ring is made of "O" shaped rubber and is installed in the annular groove to seal and prevent liquid leakage. The interference groove is used to achieve an interference fit between the shaft sleeve and the pump shaft to ensure a tight connection.

[0020] By incorporating a protective structure and using a bushing made of carbon steel plated with hard chrome, which possesses high hardness and wear resistance, the bushing is pressed and fixed to the outside of the bushing by locking screws and nuts, thus ensuring a tight connection between the bushing and the bushing. This also facilitates the disassembly of the bushing, making it easy to replace worn bushing parts, reducing costs. Furthermore, the bushing enhances the wear resistance and corrosion resistance of the bushing, extending its service life. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0022] Figure 2 This is a three-dimensional cross-sectional structural diagram of the present invention;

[0023] Figure 3 This is a three-dimensional structural diagram of the reinforcing block of this utility model;

[0024] Figure 4 This is a three-dimensional cross-sectional structural diagram of the protective structure of this utility model;

[0025] Figure 5 This is a side view sectional structural diagram of the bushing of this utility model.

[0026] The reference numerals in the figure are as follows: 1. Bushing; 2. Shoulder; 3. Sealing structure; 301. Reinforcing block; 302. Keyway; 303. Annular groove; 304. Sealing ring; 305. Interference fit groove; 4. Protective structure; 401. Bushing; 402. Mounting ring; 403. Mounting hole; 404. Locking screw; 405. Mounting groove; 406. Annular gland; 407. Locking nut; 408. Wear-resistant layer; 409. Anti-corrosion layer. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] Please see Figure 1-5The present invention provides a centrifugal pump shaft sleeve structure, including a shaft sleeve 1 and a protective structure 4.

[0029] Reference Figures 1-3 As shown, a sealing structure 3 is fixed inside the bushing 1. The sealing structure 3 includes a reinforcing block 301 fixed to the top of the bushing 1. A keyway 302 is provided on one side of the reinforcing block 301. An annular groove 303 is provided inside the bushing 1 at the bottom of the reinforcing block 301. A sealing ring 304 is installed inside the annular groove 303. An interference groove 305 is provided inside the bushing 1. The reinforcing block 301 is a ceramic ring. The sealing ring 304 is "O" shaped and made of rubber.

[0030] The reinforcing block 301 is a ceramic ring, fixed inside the top of the bushing 1 to enhance wear resistance. The sealing ring 304 is made of "O"-shaped rubber and installed in the annular groove 303 to provide a seal and prevent liquid leakage. The interference groove 305 is used to achieve an interference fit between the bushing 1 and the pump shaft to ensure a tight connection. The keyway 302 is used to install the shaft key to further fix the relative position of the bushing 1 and the pump shaft for easy use.

[0031] Reference Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown, a shoulder 2 is fixed to the outer side of the top end of the bushing 1. A protective structure 4 is installed on the outer side of the bushing 1. The protective structure 4 includes a bushing 401 installed on the outer side of the bushing 1. A mounting ring 402 is fixed to the top end of the bushing 401. A mounting hole 403 is provided inside the mounting ring 402. A locking screw 404 is installed inside the mounting hole 403. A mounting groove 405 is provided inside the bottom end of the bushing 401. An annular pressure cap 406 is installed inside the mounting groove 405. A locking nut 407 is installed on the outer side of the bushing 1 at one end of the annular pressure cap 406. A wear-resistant layer 408 is provided on the outer side of the bushing 401. The inner side of the bushing 401... The bushing 1 is made of carbon steel plated with hard chrome. The bottom end of the shoulder 2 is provided with threaded holes that correspond one-to-one with the mounting ring 402. The locking screw 404 and the shoulder 2 are connected by threads through the threaded holes. The mounting holes 403 are evenly distributed inside the mounting ring 402. The annular cover 406 is made of carbon steel. The outer side of the bushing 1 is provided with external threads that match the inside of the locking nut 407. The bushing 1 and the locking nut 407 are connected by threads. The bushing 401 is made of tungsten carbide. The wear-resistant layer 408 is a metal-ceramic composite coating. The anti-corrosion layer 409 is made of polytetrafluoroethylene.

[0032] The bushing 1 is made of carbon steel plated with hard chrome, which has high hardness and wear resistance. The mounting ring 402 is fixed to the shaft shoulder 2 by the locking screw 404 engaging with the threaded hole, forming a threaded connection to ensure structural stability. The annular pressure cap 406 is installed inside the mounting groove 405, and the bushing 401 is pressed and fixed by the locking nut 407 engaging with the external thread of the bushing 1, thus ensuring a tight connection between the bushing 401 and the bushing 1. This also facilitates the disassembly of the bushing 401, making it easy to replace worn bushing parts and reduce costs. The bushing 401 is made of tungsten carbide and installed on the outside of the bushing 1, which has extremely high wear resistance. The wear-resistant layer 408 is a metal-ceramic composite coating applied to the outside of the bushing 401 to further improve wear resistance. The anti-corrosion layer 409 is made of polytetrafluoroethylene and is placed on the inside of the bushing 401 to prevent media corrosion, thereby further enhancing the wear resistance and corrosion resistance of the bushing 1 and extending its service life.

[0033] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A centrifugal pump shaft sleeve structure, comprising a shaft sleeve (1) and a protective structure (4); Its features are: A shoulder (2) is fixed on the outer side of the top end of the bushing (1), and a sealing structure (3) is fixed inside the bushing (1); A protective structure (4) is installed on the outer side of the bushing (1). The protective structure (4) includes a bushing (401) installed on the outer side of the bushing (1). A mounting ring (402) is fixed at the top of the bushing (401). A mounting hole (403) is provided inside the mounting ring (402). A locking screw (404) is installed inside the mounting hole (403). A mounting groove (405) is provided inside the bottom of the bushing (401). An annular cover (406) is installed inside the mounting groove (405). A locking nut (407) is installed on the outer side of the bushing (1) at one end of the annular cover (406). A wear-resistant layer (408) is provided on the outer side of the bushing (401). An anti-corrosion layer (409) is provided on the inner side of the bushing (401).

2. The centrifugal pump shaft sleeve structure according to claim 1, characterized in that: The sealing structure (3) includes a reinforcing block (301) fixed to the top of the inside of the bushing (1). A keyway (302) is provided on one side of the reinforcing block (301). An annular groove (303) is provided inside the bushing (1) at the bottom of the reinforcing block (301). A sealing ring (304) is installed inside the annular groove (303). An interference groove (305) is provided inside the bushing (1).

3. The centrifugal pump shaft sleeve structure according to claim 2, characterized in that: The reinforcing block (301) is a ceramic ring, the sealing ring (304) is "O" shaped, and the sealing ring (304) is made of rubber.

4. The centrifugal pump shaft sleeve structure according to claim 1, characterized in that: The bushing (1) is made of carbon steel plated with hard chrome. The bottom end of the shoulder (2) is provided with threaded holes corresponding to the mounting ring (402). The locking screw (404) and the shoulder (2) are connected by threaded holes.

5. The centrifugal pump shaft sleeve structure according to claim 1, characterized in that: The mounting holes (403) are evenly distributed inside the mounting ring (402). The annular cover (406) is made of carbon steel. The bushing (1) has an external thread that matches the inside of the locking nut (407). The bushing (1) and the locking nut (407) are threadedly connected.

6. The centrifugal pump shaft sleeve structure according to claim 1, characterized in that: The bushing (401) is made of tungsten carbide, the wear-resistant layer (408) is a metal-ceramic composite coating, and the anti-corrosion layer (409) is made of polytetrafluoroethylene.

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