Anti-upward-moving structure of centrifugal pump

Abstract

The utility model relates to the technical field of centrifugal pumps, and discloses a centrifugal pump anti-upward-moving structure which comprises an impeller, a guide shell assembly and a flange bearing sleeve, a guide shell is arranged on the outer side of the guide shell assembly, a bearing bush is embedded in an inner hole of a hub of the guide shell, a damping pad and a thrust bearing are sequentially arranged on the outer end face of the bearing bush and the outer end face of the guide shell, and the flange bearing bush is connected with the impeller. An impeller is arranged on the inner side of the guide shell assembly, a pump shaft is fixedly connected to the inner side of the impeller, the outer side of the pump shaft is fixedly connected with the flange bearing sleeve, the outer side of the flange bearing sleeve penetrates through the bearing bush, the impeller is arranged at the lower end of the flange bearing sleeve, and the flange bearing sleeve and the impeller penetrate through the pump shaft step by step. And an external thread is arranged at the outlet end of the pump shaft. In the utility model, the pump shaft is connected with the impeller through the flange bearing sleeve and is supported by axial force during rotation, the lubrication and the stability are enhanced by the lubrication empty groove, and the structure is ensured to be stable and prevented from moving upwards through the screw and the nut.

Description

Technical Field

[0001] The utility model relates to the technical field of centrifugal pumps, in particular to an anti-upward-flowing structure for centrifugal pumps. Background Art

[0002] A centrifugal pump is a fluid conveying machine that relies on the high-speed rotation of the impeller to generate centrifugal force, causing the liquid to be thrown from the center of the impeller to the outer edge of the impeller, thereby forming a low-pressure area in the center of the impeller. Under the action of pressure difference, the suction and discharge of the liquid are realized. At the same time, due to the change in flow rate, the axial force of the impeller will be directed toward the outlet, causing the centrifugal pump to rise. In order to prevent the centrifugal pump from rising, a centrifugal pump anti-rising structure is needed.

[0003] A centrifugal pump anti-upward movement structure is specially designed to prevent the rotor of the centrifugal pump from moving upward during operation. It includes an axial force balancing device, which generates a balancing force opposite to the axial force under the action of fluid pressure to balance the axial force and prevent the rotor from moving upward.

[0004] The anti-upward movement structure of centrifugal pumps currently on the market installs set screws at both ends of the coupling connecting the pump and the motor, and the motor bears the bidirectional axial force of the pump shaft and impeller to prevent upward movement. However, in actual use, the coupling is easy to fall off and the installation steps are cumbersome. At the same time, it cannot effectively bear large axial forces toward the outlet, affecting the normal operation and service life of the centrifugal pump, thereby reducing the reliability of the device. Utility Model Content

[0005] In order to make up for the above shortcomings, the utility model provides a centrifugal pump anti-upward flow structure, which aims to improve the problem in the prior art that the centrifugal pump anti-upward flow structure cannot effectively bear large axial forces toward the outlet direction.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a centrifugal pump anti-upward structure, comprising an impeller, a guide housing assembly and a flange bearing sleeve, the outer side of the guide housing assembly is provided with a guide housing, the inner hole of the guide housing hub is inlaid with a bearing shell, the bearing shell and the outer end surface of the guide housing are sequentially provided with a vibration damping pad and a thrust bearing, the inner side of the guide housing assembly is provided with an impeller, the inner side of the impeller is fixedly connected to a pump shaft, the outer side of the pump shaft is fixedly connected to the flange bearing sleeve, the outer side of the flange bearing sleeve passes through the bearing shell, the lower end of the flange bearing sleeve is provided with an impeller, the flange bearing sleeve and the impeller are progressively passed through the pump shaft, the outlet end of the pump shaft is provided with an external thread, the flange bearing sleeve and the impeller are fixedly connected to the pump shaft by a round nut, a lubrication groove is provided at the bottom of the thrust bearing, the vibration damping pad and the thrust bearing are fixedly connected to the bearing shell by screws, and the outer side of the pump shaft is provided with a bearing sleeve key and an impeller key.

[0007] As a further description of the above technical solution:

[0008] The outer sides of the flange bearing sleeve are respectively slidably connected with the thrust bearing and the bearing bush.

[0009] As a further description of the above technical solution:

[0010] A vibration damping pad is provided at the bottom of the thrust bearing, and both the vibration damping pad and the thrust bearing are fixedly connected to the bearing shell.

[0011] As a further description of the above technical solution:

[0012] The inner side of the lubricating groove is threadedly connected with a screw, and the lubricating groove is threadedly connected to the screw.

[0013] As a further description of the above technical solution:

[0014] A water inlet section is provided on the inlet side of the pump shaft, and a filter is fixedly connected to the outer side of the water inlet section.

[0015] The utility model has the following beneficial effects:

[0016] 1. In the present invention, the outer side of the pump shaft is fixedly connected to the flange bearing sleeve and connected by a round nut. The lower end of the flange bearing sleeve is fixed to the impeller, and the inner hole of the guide housing is inlaid with a bearing shell. The bearing shell and the outer end surface of the guide housing are provided with a vibration damping pad and a thrust bearing. Multiple support members are fixed on both sides of the pump shaft to support the impeller. When the pump shaft rotates, the impeller is subjected to axial force, and the force is transmitted through the flange bearing sleeve to provide axial support. The lubrication groove of the thrust bearing is convenient for liquid filling for lubrication. The screws and nuts ensure the stability of the structure to prevent upward movement.

[0017] 2. In the utility model, the thrust bearing is located on the right side of the vibration damping pad, which can withstand the upward axial force when the impeller moves upward. The thrust bearing and the flange bearing sleeve cooperate to achieve force balance. The lubrication groove on the thrust bearing is used to store liquid and the bottom through hole is used for screw fixing, which can be lubricated to reduce wear and improve the load-bearing capacity of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a front view of a centrifugal pump anti-upward structure proposed by the utility model;

[0019] Figure 2 This is a partial structural diagram of a centrifugal pump anti-upward structure proposed by the utility model;

[0020] Figure 3 This is a partial structural diagram of a centrifugal pump anti-upward structure proposed by the utility model.

[0021] Legend:

[0022] 1. Pump shaft; 2. Water inlet section; 3. Filter screen; 4. Impeller; 5. Guide housing assembly; 6. Guide housing; 7. Flange bearing sleeve; 8. Bearing sleeve key; 9. Round nut; 10. Bearing shell; 11. Vibration damping pad; 12. Thrust bearing; 13. Screw; 14. Lubrication slot; 15. Impeller key. DETAILED DESCRIPTION

[0023] 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.

[0024] Reference Figure 1 、 Figure 2 and Figure 3 The utility model provides an embodiment: a centrifugal pump anti-upward structure, including an impeller 4, a guide housing assembly 5 and a flange bearing sleeve 7, a guide housing 6 is provided on the outside of the guide housing assembly 5, a bearing bush 10 is inlaid in the inner hole of the hub of the guide housing 6, and a vibration damping pad 11 and a thrust bearing 12 are provided on the outer end surface of the bearing bush 10 and the guide housing 6 in sequence, an impeller 4 is provided on the inside of the guide housing assembly 5, a pump shaft 1 is fixedly connected to the inside of the impeller 4, and the outer side of the pump shaft 1 is fixedly connected to the flange bearing sleeve 7, and the flange shaft The outer side of the sleeve 7 passes through the bearing shell 10. The lower end of the flanged bearing sleeve 7 is provided with an impeller 4. The flanged bearing sleeve 7 and the impeller 4 are progressively inserted into the pump shaft 1. The outlet end of the pump shaft 1 is provided with an external thread. The flanged bearing sleeve 7 and the impeller 4 are fixedly connected to the pump shaft 1 via a round nut 9. A lubrication groove 14 is provided at the bottom of the thrust bearing 12. The vibration damping pad 11 and the thrust bearing 12 are fixedly connected to the bearing shell 10 via screws 13. The outer side of the pump shaft 1 is provided with a bearing sleeve key 8 and an impeller key 15.

[0025] Specifically, one side of the pump shaft 1 is fixedly connected to the flange bearing sleeve 7 and is threadedly connected through a round nut 9. The lower end of the flange bearing sleeve 7 is fixed to the impeller 4. The inner hole of the hub of the guide shell 6 is inlaid with a bearing bush 10. A vibration damping pad 11 and a thrust bearing 12 are arranged between the bearing bush 10 and the outer end surface of the guide shell 6 in sequence. The impeller 4 is located on the inner side of the guide shell assembly 5. Multiple support members are composed of the bearing bush 10, the vibration damping pad 11, the thrust bearing 12 and the screw 13 to fix the impeller 4. When the pump shaft 1 rotates, the impeller 4 is subjected to axial force, and the force is transmitted through the flange bearing sleeve 7. The flange bearing The sleeve 7 cooperates with the thrust bearing 12 to provide axial support. At the same time, the lubrication groove 14 fixed by the screw 13 on the thrust bearing 12 is convenient for liquid filling to achieve lubrication. The design of the flange bearing sleeve 7 improves the operating stability, and the cooperation with the bearing shell 10 and other components may provide radial support. The fixation of the screw 13 and the round nut 9 ensures the stability of the entire structure, prevents upward movement during operation, and ensures the normal operation of the centrifugal pump. The auxiliary bearing sleeve key 8 and the lubrication groove 14 at the bottom of the thrust bearing 12 further provide lubrication to prevent the centrifugal pump from moving upward.

[0026] Reference Figure 1 、 Figure 2 and Figure 3 The outer sides of the flange bearing sleeve 7 are respectively slidably connected with the thrust bearing 12 and the bearing bush 10, which can support the device; a vibration damping pad 11 is provided at the bottom of the thrust bearing 12, and the vibration damping pad 11 and the thrust bearing 12 are fixedly connected with the bearing bush 10, which can improve the stability of the device;

[0027] Specifically, the flange bearing sleeve 7 and the thrust bearing 12 can cooperate to provide axial support for the device, and the vibration-damping pad 11 can provide shock absorption when the device is running, thereby improving the stability of the device.

[0028] Reference Figure 1 and Figure 3 The inner side of the lubrication groove 14 is threadedly connected with a screw 13, and the lubrication groove 14 is threadedly connected to the screw 13, which can facilitate lubrication and improve stability; a water inlet section 2 is provided on the inlet side of the pump shaft 1, and a filter screen 3 is fixedly connected to the outer side of the water inlet section 2, which can improve the protection effect of the device;

[0029] Specifically, the lubrication slot 14 can facilitate lubrication to enhance the stability of the device, and the filter screen 3 outside the water inlet section 2 can enhance the protection effect of the device.

[0030] Working principle: When the device is running, the outer side of the pump shaft 1 is fixedly connected to the flange bearing sleeve 7 and is threadedly connected through a round nut 9. The lower end of the flange bearing sleeve 7 is fixed to the impeller 4, and the inner hole of the guide housing 6 hub is inlaid with a bearing bush 10. The bearing bush 10 and the outer end surface of the guide housing 6 are sequentially provided with a vibration damping pad 11 and a thrust bearing 12. The impeller 4 is located on the inner side of the guide housing assembly 5. Multiple support members composed of bearing bushes 10, vibration damping pads 11, thrust bearings 12, and screws 13 are fixed on the left and right sides of the pump shaft 1 to fix the impeller 4. When the pump shaft 1 rotates and the impeller 4 is subjected to axial force, the force will be transmitted through the flange bearing sleeve 7. The flange bearing sleeve 7 and The thrust bearing 12 cooperates to play an axial supporting role, and the lubrication groove 14 fixed by the screw 13 on the thrust bearing 12 is convenient for liquid filling to play a lubricating role, and cooperates with the flange bearing sleeve 7 to improve the operating stability. At the same time, the cooperation of the flange bearing sleeve 7 and the bearing shell 10 and other components may also play a radial supporting role. The fixing effect of the screw 13 and the round nut 9 ensures the stability of the entire structure, prevents the upward movement during operation, and ensures the normal operation of the centrifugal pump. At the same time, the bearing sleeve key 8 plays an auxiliary role, and the lubrication groove 14 at the bottom of the thrust bearing 12 provides lubrication to prevent the centrifugal pump from moving upward.

[0031] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A centrifugal pump anti-upward movement structure, comprising an impeller (4), a guide housing assembly (5) and a flange bearing sleeve (7), characterized in that: A guide housing (6) is provided on the outside of the guide housing assembly (5), a bearing bush (10) is embedded in the inner hole of the hub of the guide housing (6), a vibration damping pad (11) and a thrust bearing (12) are provided on the outer end surface of the bearing bush (10) and the guide housing (6) in sequence, an impeller (4) is provided on the inside of the guide housing assembly (5), a pump shaft (1) is fixedly connected to the inner side of the impeller (4), the outer side of the pump shaft (1) is fixedly connected to the flange bearing sleeve (7), the outer side of the flange bearing sleeve (7) passes through the bearing bush (10), and the flange bearing sleeve (7) is provided with a plurality of bearing bushes. An impeller (4) is provided at the lower end, the flange bearing sleeve (7) and the impeller (4) are progressively inserted into the pump shaft (1), an external thread is provided at the outlet end of the pump shaft (1), the flange bearing sleeve (7) and the impeller (4) are fixedly connected to the pump shaft (1) via a round nut (9), a lubrication groove (14) is provided at the bottom of the thrust bearing (12), the vibration damping pad (11) and the thrust bearing (12) are fixedly connected to the bearing bush (10) via a screw (13), and a bearing sleeve key (8) and an impeller key (15) are provided on the outer side of the pump shaft (1).

2. The anti-upward movement structure of a centrifugal pump according to claim 1, characterized in that: The outer sides of the flange bearing sleeve (7) are respectively slidably connected to the thrust bearing (12) and the bearing bush (10).

3. The anti-upward movement structure of a centrifugal pump according to claim 1, characterized in that: A vibration damping pad (11) is provided at the bottom of the thrust bearing (12), and the vibration damping pad (11) and the thrust bearing (12) are both fixedly connected to the bearing shell (10).

4. The anti-upward movement structure of a centrifugal pump according to claim 1, characterized in that: The inner side of the lubricating slot (14) is threadedly connected to a screw (13), and the lubricating slot (14) is threadedly connected to the screw (13).

5. The anti-upward movement structure of a centrifugal pump according to claim 1, characterized in that: A water inlet section (2) is provided on the inlet side of the pump shaft (1), and a filter screen (3) is fixedly connected to the outside of the water inlet section (2).

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