Axial force balancing device of centrifugal pump

Abstract

The utility model discloses a centrifugal pump axial force balancing device which comprises a centrifugal pump shell and a shaft body installed on the centrifugal pump shell, a balance block capable of adjusting balance force is installed on the shaft body, and an installation shaft hole used for installing the balance block is formed in the center of the balance block. A plurality of adjusting assemblies arranged at equal intervals are arranged on the edge of the balance block. According to the utility model, firstly, the adjustable balance block is arranged on the shaft body, so that the position of the corresponding impeller can be adjusted according to actual requirements, and the position of the impeller can be adjusted only by loosening the threaded pin, separating the threaded pin from the corresponding limiting clamping hole and rotating the adjusting bolt under the action of threads of the threaded sleeve; the position, away from the center of the pump shaft, of the adjusting block is adjusted, so that the deflecting force corresponding to the impeller position can be adjusted, it is guaranteed that the deflecting force of each impeller is the same, abrasion of the pump shaft is reduced, and the running stability of the pump shaft is guaranteed.

Description

Technical Field

[0001] This utility model relates to the technical field of axial force balancing devices, and in particular to an axial force balancing device for a centrifugal pump. Background Technology

[0002] The main function of the axial force balancing device for a centrifugal pump is to counteract the axial force generated when the impeller rotates, reduce the burden on the bearings, ensure the normal operation of the pump, and extend its service life. These devices balance the axial force through different mechanisms, thereby reducing the impact on the pump shaft and preventing equipment damage or performance degradation caused by excessive axial force.

[0003] As disclosed in Publication No. CN209800343U, a self-balancing device for axial thrust of a centrifugal pump is presented. To address the technical problems of complex structure and poor axial thrust balancing effect in existing centrifugal pump axial thrust balancing devices, this utility model provides a self-balancing device for axial thrust of a centrifugal pump, comprising a pump casing, a pump support body, a pump shaft, an impeller, and guide vanes. The pump support body is disposed within the pump casing; the pump shaft is fixed within the pump support body via bearings; the impeller is fixed to the pump shaft; the guide vanes are disposed between the pump support body and the pump casing; the guide vanes are connected to the impeller; a fixing ring is disposed between the bearing and the impeller, and the fixing ring is fixed to the pump support body; there is an axially variable clearance between the fixing ring and the impeller; there is a radially fixed clearance between the pump support body and the impeller; the pump support body, impeller, and fixing ring form an annular balancing cavity.

[0004] Although the above technical solutions have solved the corresponding technical problems, they still have the following drawbacks:

[0005] The above technical solution is not convenient for adjusting the axial balance force of the centrifugal pump. When the corresponding impeller of the centrifugal pump wears, the corresponding balance force cannot be adjusted. During operation, it will aggravate the deflection force of the centrifugal pump shaft, thereby increasing the wear of the pump shaft. Utility Model Content

[0006] The purpose of this invention is to provide an axial force balancing device for a centrifugal pump. First, by using an adjustable balancing block on the shaft, the position of the corresponding impeller can be adjusted according to actual needs. Simply loosen the threaded pin and disengage it from the corresponding limit hole, then rotate the adjusting bolt, and under the action of the threaded sleeve, adjust the position of the adjusting block from the center of the pump shaft. This adjusts the bias force of the corresponding impeller position and ensures that the bias force of each impeller is the same, thus reducing the wear of the pump shaft and ensuring the stability of the pump shaft operation.

[0007] To achieve the above objectives, the main technical solutions adopted by this utility model include:

[0008] An axial force balancing device for a centrifugal pump, comprising:

[0009] A centrifugal pump housing and a shaft mounted on the centrifugal pump housing, wherein an adjustable balancing block is mounted on the shaft.

[0010] In the aforementioned centrifugal pump axial force balancing device, a mounting shaft hole for mounting the balancing block is provided at the center of the balancing block.

[0011] In the aforementioned centrifugal pump axial force balancing device, a plurality of adjusting components are arranged at equal intervals at the edge of the balancing block, and a plurality of mounting slots corresponding to the positions of the plurality of adjusting components are provided on the balancing block.

[0012] In the aforementioned centrifugal pump axial force balancing device, the adjusting component includes an adjusting bolt, the end of which is rotatably mounted on the side of the inner wall of the mounting groove via a bearing, an adjusting block is threadedly connected to the adjusting bolt, and a threaded sleeve is provided on the adjusting block at a position corresponding to the adjusting bolt, which is threadedly connected to the adjusting bolt.

[0013] In the aforementioned centrifugal pump axial force balancing device, a threaded pin for fixing the adjusting bolt is provided on the balancing block at the position corresponding to the adjusting bolt, a threaded groove that meshes with the threaded pin is provided on the balancing block at the position corresponding to the threaded pin, and a limiting hole that matches the threaded pin is provided on the adjusting bolt at the position corresponding to the threaded pin.

[0014] In the aforementioned centrifugal pump axial force balancing device, a limiting bearing sleeve that is rotatably connected to the adjusting bolt is provided on the side of the balancing block and at the position corresponding to the adjusting bolt.

[0015] In the aforementioned centrifugal pump axial force balancing device, the top and bottom of the adjusting block are fixedly connected to limit sliders, and the inner wall of the adjusting block is provided with a limit groove that matches the limit slider at the position corresponding to the limit slider.

[0016] This utility model has at least the following beneficial effects:

[0017] The centrifugal pump axial force balancing device provided by this utility model firstly allows for adjustment of the corresponding impeller position according to actual needs through an adjustable balancing block set on the shaft. Simply loosen the threaded pin and disengage it from the corresponding limit hole, then rotate the adjusting bolt, and adjust the position of the adjusting block from the pump shaft center under the action of the threaded sleeve. This adjusts the bias force of the corresponding impeller position and ensures that the bias force of each impeller is the same, thus reducing pump shaft wear and ensuring the stability of pump shaft operation. Attached Figure Description

[0018] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0019] Figure 1 This is a schematic diagram of the axial force balancing device for centrifugal pumps according to this utility model;

[0020] Figure 2 This is a schematic diagram of the structure of the balance block in the centrifugal pump axial force balancing device of this utility model;

[0021] Figure 3 This is a schematic cross-sectional view of the balance block in the centrifugal pump axial force balancing device of this utility model.

[0022] Figure 4 This is an exploded structural diagram of the balance block in the centrifugal pump axial force balancing device of this utility model;

[0023] Figure 5 This is a schematic diagram of the adjusting component in the centrifugal pump axial force balancing device of this utility model.

[0024] Explanation of icon numbers:

[0025] 1. Centrifugal pump casing; 2. Shaft; 3. Counterweight;

[0026] 301. Install the shaft hole;

[0027] 302. Mounting slot;

[0028] 303. Adjustment components;

[0029] 3031. Adjusting bolt; 3032. Adjusting block; 3033. Threaded sleeve; 3034. Limiting hole; 3035. Limiting bearing sleeve; 3036. Limiting slider; 3037. Limiting groove;

[0030] 304, threaded pin; 3041, threaded groove. Detailed Implementation

[0031] The following will describe in detail the implementation of this application with reference to the accompanying drawings and embodiments, so that the implementation process of how this application uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0032] Please refer to Figures 1 to 5 As shown in the figure, an embodiment of the present invention provides a centrifugal pump axial force balancing device, including: a centrifugal pump housing 1 and a shaft 2 installed on the centrifugal pump housing 1, and a balance block 3 with adjustable balancing force installed on the shaft 2.

[0033] Please refer to Figures 1 to 5 As shown, a mounting shaft hole 301 for mounting the balance block 3 is provided at the center of the balance block 3.

[0034] Please refer to Figures 1 to 5 As shown, a number of adjustment components 303 are arranged at equal intervals at the edge of the balance block 3, and a number of mounting slots 302 corresponding to the adjustment components 303 are provided on the balance block 3.

[0035] Please refer to Figures 1 to 5 As shown, the adjustment assembly 303 includes an adjustment bolt 3031. The end of the adjustment bolt 3031 is rotatably mounted on the side of the inner wall of the mounting groove 302 via a bearing. An adjustment block 3032 is threadedly connected to the adjustment bolt 3031. A threaded sleeve 3033 is provided on the adjustment block 3032 at a position corresponding to the adjustment bolt 3031 and is threadedly connected to the adjustment bolt 3031.

[0036] Please refer to Figures 1 to 5 As shown, a threaded pin 304 for fixing the adjusting bolt 3031 is provided on the balance block 3 at the position corresponding to the adjusting bolt 3031. A threaded groove 3041 that meshes with the threaded pin 304 is provided on the balance block 3 at the position corresponding to the threaded pin 304. A limiting hole 3034 that matches the threaded pin 304 is provided on the adjusting bolt 3031 at the position corresponding to the threaded pin 304.

[0037] By adopting the above technical solution, the stability limit after the adjusting bolt 3031 rotates is increased by setting the limit hole 3034.

[0038] Please refer to Figures 1 to 5 As shown, a limit bearing sleeve 3035 is provided on the side of the balance block 3 at the position corresponding to the adjusting bolt 3031, which is rotatably connected to the adjusting bolt 3031.

[0039] By adopting the above technical solution, the stability of the rotation of the adjusting bolt 3031 is increased by setting the limit bearing sleeve 3035.

[0040] Please refer to Figures 1 to 5 As shown, the top and bottom of the adjusting block 3032 are fixedly connected to the limiting slider 3036, and the inner wall of the adjusting block 3032 and the position corresponding to the limiting slider 3036 are provided with a limiting groove 3037 that matches the limiting slider 3036.

[0041] By adopting the above technical solution, the limiting groove 3037 and the limiting slider 3036 are set to limit the adjustment block 3032, thereby increasing the stability of the adjustment block 3032.

[0042] In use, firstly, the position of the corresponding impeller can be adjusted according to actual needs by using the adjustable balance block 3 set on the shaft 2. Simply loosen the threaded pin 304 and make the threaded pin 304 disengage from the corresponding limit hole 3034, then rotate the adjusting bolt 3031, and under the action of the thread of the threaded sleeve 3033, adjust the position of the adjusting block 3032 from the center of the pump shaft. This adjusts the bias force of the corresponding impeller position and ensures that the bias force of each impeller is the same, thus reducing the wear of the pump shaft and ensuring the stability of the pump shaft operation.

[0043] The working principle of the centrifugal pump axial force balancing device in this embodiment is as follows:

[0044] Installation and Structure:

[0045] The balance block 3 is mounted on the shaft 2 through its central mounting hole 301, ensuring that it rotates synchronously with the shaft 2.

[0046] The edge of the balance block 3 is provided with equal-distancely arranged adjustment components 303. Each adjustment component 303 includes an adjustment bolt 3031, an adjustment block 3032, and related fixing and limiting structures.

[0047] The adjusting bolt 3031 is rotatably mounted in the mounting groove 302 of the balance block 3 via a bearing, ensuring smooth rotation.

[0048] The adjusting block 3032 is connected to the adjusting bolt 3031 via the threaded sleeve 3033, so that the adjusting block 3032 can move along the axial direction of the adjusting bolt 3031.

[0049] Adjustment process:

[0050] When it is necessary to adjust the position of the balance block 3 to balance the axial force, first loosen the threaded pin 304 of the fixing adjusting bolt 3031 so that it is disengaged from the limit hole 3034, thereby releasing the fixing of the adjusting bolt 3031.

[0051] Subsequently, by rotating the adjusting bolt 3031, the adjusting block 3032 is pushed or pulled along the axial direction of the adjusting bolt 3031 by utilizing the threaded connection between the threaded sleeve 3033 and the adjusting bolt 3031.

[0052] The movement of the adjusting block 3032 changes its position relative to the pump shaft center, thereby adjusting the bias force at the corresponding impeller position.

[0053] By adjusting multiple adjustment components 303, it can be ensured that each impeller is subjected to the same bias force, thereby achieving the purpose of balancing the axial force.

[0054] Limits and stability:

[0055] The design of the limit hole 3034 and the threaded pin 304 increases the stability limit after the adjusting bolt 3031 rotates, preventing it from loosening or shifting during operation.

[0056] The setting of the limit bearing sleeve 3035 improves the stability of the rotation of the adjusting bolt 3031 and reduces the risk of loosening due to vibration or impact.

[0057] The limiting slider 3036 and the limiting groove 3037 on the adjusting block 3032 cooperate with each other to limit the movement of the adjusting block 3032, ensuring its stability and accuracy during the adjustment process.

[0058] Effects and advantages:

[0059] By adjusting the position of the balance block 3, the axial force generated by the centrifugal pump during operation can be precisely balanced, reducing the wear of the pump shaft 2 and extending the service life of the pump.

[0060] The adjustment process of the balance block 3 is simple and quick, without the need to disassemble the pump body 1 or impeller and other components, which reduces maintenance costs and downtime.

[0061] The design of this device improves the stability and reliability of centrifugal pump operation and reduces the risk of failure and downtime caused by axial force imbalance.

[0062] The foregoing description illustrates and describes several preferred embodiments of the present invention. However, as previously stated, it should be understood that the present invention is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the inventive concept described herein through the foregoing teachings or techniques or knowledge in related fields. Any modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention should be within the protection scope of the appended claims.

Claims

1. An axial force balancing device for a centrifugal pump, comprising a centrifugal pump housing (1) and a shaft (2) mounted on the centrifugal pump housing (1), characterized in that, An adjustable balancing block (3) is installed on the shaft (2), and a mounting shaft hole (301) for installing the balancing block (3) is provided at the center of the balancing block (3); The edge of the balance block (3) is provided with a plurality of adjustment components (303) arranged at equal intervals, and the balance block (3) is provided with a plurality of mounting slots (302) corresponding to the positions of the plurality of adjustment components (303).

2. The centrifugal pump axial force balancing device according to claim 1, characterized in that: The adjusting assembly (303) includes an adjusting bolt (3031), the end of which is rotatably mounted on the side of the inner wall of the mounting groove (302) via a bearing. An adjusting block (3032) is threadedly connected to the adjusting bolt (3031), and a threaded sleeve (3033) is provided on the adjusting block (3032) at a position corresponding to the adjusting bolt (3031) and threadedly connected to the adjusting bolt (3031).

3. The centrifugal pump axial force balancing device according to claim 2, characterized in that: The balance block (3) is provided with a threaded pin (304) for fixing the adjusting bolt (3031) at the position corresponding to the adjusting bolt (3031). The balance block (3) is provided with a threaded groove (3041) that meshes with the threaded pin (304) at the position corresponding to the threaded pin (304). The adjusting bolt (3031) is provided with a limiting hole (3034) that matches the threaded pin (304) at the position corresponding to the threaded pin (304).

4. The centrifugal pump axial force balancing device according to claim 3, characterized in that: A limiting bearing sleeve (3035) is provided on the side of the balance block (3) at the position corresponding to the adjusting bolt (3031) and is rotatably connected to the adjusting bolt (3031).

5. The centrifugal pump axial force balancing device according to claim 4, characterized in that: The top and bottom of the adjusting block (3032) are both fixedly connected to limit sliders (3036).

6. The centrifugal pump axial force balancing device according to claim 5, characterized in that: The inner wall of the adjusting block (3032) is provided with a limiting groove (3037) that matches the limiting slider (3036) at the position corresponding to the limiting slider (3036).

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