Single-diaphragm coupling of centrifugal pump

Abstract

The utility model relates to the technical field of centrifugal pumps, and discloses a centrifugal pump single diaphragm coupling which comprises a motor body, a motor base is installed at one end of the motor body through a connecting sleeve, a motor shaft is fixedly connected to one end of the motor body, an upper flange is movably connected to the outer portion of the motor shaft in a sleeved mode, and the upper flange is fixedly connected with the motor base. A lower flange is installed on one side of the upper flange, a diaphragm is installed between the upper flange and the lower flange, a pump shaft is movably connected into the lower flange in a sleeved mode, two sets of nuts are installed at one end of the pump shaft in a threaded mode, and the other end of the pump shaft is fixedly connected with a machine seal chamber. According to the centrifugal pump single-diaphragm coupler, the lower flange is installed outside the pump shaft through the nut in a sleeving mode, meanwhile, the diaphragm is installed between the upper flange and the lower flange, the motor shaft is driven by the motor body to be installed inside the upper flange, deviation between shaft systems is compensated through elastic deformation of the metal diaphragm, and the centrifugal pump single-diaphragm coupler has the advantages of being free of abrasion and maintenance, high in reliability and the like. And the service life of the equipment is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of centrifugal pump technology, specifically to a single diaphragm coupling for centrifugal pumps. Background Technology

[0002] Centrifugal pumps work by using the rotation of the mechanical seal chamber to cause the water to move in a centrifugal motion. Before starting the pump, the motor base and suction pipe must be filled with water. Then, the motor is started, and the pump shaft drives the mechanical seal chamber and water to rotate at high speed. The water undergoes centrifugal motion and is thrown towards the outer edge of the mechanical seal chamber, flowing into the pump's discharge pipe through the flow channel of the volute motor base.

[0003] When assembling a centrifugal pump, a motor needs to be installed on one side of the mechanical seal chamber. To improve the ease of installation between the motor and the mechanical seal chamber, a coupling is installed at the connection point. The coupling drives the motor shaft and the pump shaft to be spliced ​​together, usually fixed with bolts. However, when the motor is driven, the motor shaft generates torque, which is applied to the coupling. This torque causes the coupling to deform under continuous torque, resulting in damage to the coupling and a reduction in its service life. Therefore, we propose a single diaphragm coupling for centrifugal pumps. Utility Model Content

[0004] To address the shortcomings of existing single-diaphragm couplings for centrifugal pumps, this invention provides a single-diaphragm coupling for centrifugal pumps. This coupling features a diaphragm installed between an upper flange and a lower flange. When the motor shaft applies torque to the upper and lower flanges, the diaphragm deforms, reducing damage and thus extending the service life of the upper and lower flanges. This solves the problems mentioned in the background section.

[0005] This utility model provides the following technical solution: a centrifugal pump single diaphragm coupling, including a motor body, a motor base installed at one end of the motor body via a connecting sleeve, a motor shaft fixedly connected to one end of the motor body, an upper flange movably sleeved on the outside of the motor shaft, a lower flange installed on one side of the upper flange, a diaphragm installed between the upper flange and the lower flange, a pump shaft movably sleeved inside the lower flange, two sets of nuts threaded onto one end of the pump shaft, an organic seal chamber fixedly connected to the other end of the pump shaft, and sliding grooves opened inside the upper flange and the lower flange.

[0006] Preferably, the lower part of the motor is equipped with a water outlet and a water inlet, the water inlet is connected to a water inlet pipe, and the water outlet is externally connected to a water outlet pipe.

[0007] Preferably, a sealing assembly is installed between the mechanical seal chamber and the pump shaft, and the sealing assembly is disposed on one side of the mechanical seal chamber.

[0008] Preferably, a slider is mounted on the outside of the motor shaft and the pump shaft, and the slider is movably sleeved inside the slide groove.

[0009] Preferably, fastening bolts are installed inside the upper and lower flanges, and the fastening bolts penetrate the interior of the diaphragm.

[0010] Preferably, a sealing sleeve is internally connected to the upper flange, and the sealing sleeve is located at the front end of the motor shaft.

[0011] Compared with existing couplings, this utility model has the following advantages:

[0012] This centrifugal pump single diaphragm coupling is installed on the outside of the pump shaft via a lower flange and a nut. At the same time, a diaphragm is installed between the upper and lower flanges, and the motor body drives the motor shaft installed inside the upper flange. The elastic deformation of the metal diaphragm compensates for the misalignment between the shafts. It features wear-free operation, maintenance-free operation, and high reliability, thereby improving the service life of the equipment. Attached Figure Description

[0013] Figure 1 This is a cross-sectional structural diagram of the present invention;

[0014] Figure 2 This is an enlarged structural schematic diagram of the coupling structure of this utility model;

[0015] Figure 3 This is a cross-sectional view of the coupling structure of this utility model;

[0016] Figure 4 This utility model Figure 1 Enlarged structural diagram at point A in the middle.

[0017] In the diagram: 1. Motor body; 2. Connecting sleeve; 3. Motor base; 4. Motor shaft; 5. Upper flange; 6. Lower flange; 7. Diaphragm; 8. Fastening bolt; 9. Pump shaft; 10. Nut; 11. Mechanical seal chamber; 12. Outlet; 13. Inlet; 14. Sealing assembly; 15. Sealing sleeve; 16. Slide groove. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. 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.

[0019] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4A centrifugal pump single diaphragm coupling includes a motor body 1, a motor base 3 mounted on one end of the motor body 1 via a connecting sleeve 2, a motor shaft 4 fixedly connected to one end of the motor body 1, an upper flange 5 movably sleeved on the outside of the motor shaft 4, the motor shaft 4 being sleeved on the outside of the upper flange 5, when the motor shaft 4 rotates, the motor shaft 4 drives the upper flange 5 to rotate synchronously, a lower flange 6 is installed on one side of the upper flange 5, a diaphragm 7 is installed between the upper flange 5 and the lower flange 6, the diaphragm 7 is installed inside the upper flange 5 and the lower flange 6, a pump shaft 9 movably sleeved inside the lower flange 6, two sets of nuts 10 are threaded on one end of the pump shaft 9, and an organic seal chamber 11 is fixedly connected to the other end of the pump shaft 9, the organic seal chamber 11 generates centrifugal force when it rotates, the centrifugal force drives the liquid to be transported, and a sliding groove 16 is opened inside the upper flange 5 and the lower flange 6.

[0020] refer to Figure 1 The lower part of the motor base 3 is equipped with an outlet 12 and an inlet 13. The inlet 13 is connected to an inlet pipe, and the outlet 12 is connected to an outlet pipe. The outlet 12 and the inlet 13 are installed on the outside of the motor base 3. When the mechanical seal chamber 11 rotates, the rotation of the mechanical seal chamber 11 generates centrifugal force, which simultaneously draws in the liquid. The drawn liquid drives the liquid out, thereby improving the liquid conveying efficiency.

[0021] refer to Figure 1 A sealing assembly 14 is installed between the mechanical seal chamber 11 and the pump shaft 9. The sealing assembly 14 is installed between the mechanical seal chamber 11 and the pump shaft 9, and the sealing assembly 14 is located on one side of the mechanical seal chamber 11. Liquid can flow to the inside of the pump end, and the outside of the connection of the sealing assembly 14 is sealed.

[0022] refer to Figure 3 The motor shaft 4 and pump shaft 9 are equipped with sliders on their exteriors. The sliders are movably fitted inside the slide groove 16. The sliders are installed on the exteriors of both the motor shaft 4 and pump shaft 9. At the same time, the slide groove 16 is opened inside the upper flange 5 and lower flange 6. The motor shaft 4 and pump shaft 9 are controlled to extend into the interior of the upper flange 5 and lower flange 6. The motor shaft 4 and pump shaft 9 drive the sliders to move and fit into the slide groove 16, ensuring that the motor shaft 4 is spliced ​​with the upper flange 5 and the pump shaft 9 is engaged inside the lower flange 6, improving the stability of the equipment during splicing.

[0023] refer to Figure 2 and Figure 3Fastening bolts 8 are installed inside the upper flange 5 and the lower flange 6. The fastening bolts 8 penetrate the interior of the diaphragm 7 and are installed between the upper flange 5 and the lower flange 6. At the same time, the motor shaft 4 and the pump shaft 9 are installed inside the upper flange 5 and the lower flange 6. The fastening bolts 8 are installed inside the upper flange 5 and the lower flange 6 to fix the position of the diaphragm 7 inside the upper flange 5 and the lower flange 6. When the motor shaft 4 drives the upper flange 5 to rotate, and the upper flange 5 drives the lower flange 6 to rotate, the pump shaft 9 can be driven to rotate synchronously. The elastic deformation of the diaphragm 7 compensates for the deviation between the shafts. It has the characteristics of no wear, no maintenance and high reliability, avoiding wear during equipment use and damage to the connection.

[0024] refer to Figure 3 The upper flange 5 is internally connected to a sealing sleeve 15, which is located at the front end of the motor shaft 4. The motor shaft 4 is movably sleeved inside the upper flange 5. Depending on the distance between the motor shaft 4 and the upper flange 5, the end of the motor shaft 4 is sleeved inside the upper flange 5. At the same time, the sealing sleeve 15 limits the maximum distance that the motor shaft 4 extends to the inside of the upper flange 5, ensuring that when the motor shaft 4 rotates, it can drive the upper flange 5 to rotate without interfering with the position of the pump shaft 9.

[0025] Working principle: During use, a lower flange 6 is sleeved on the outside of the pump shaft 9, and two sets of nuts 10 are installed on the outside of the pump shaft 9 to improve the stability of the pump shaft 9 and the lower flange 6 during installation. A diaphragm 7 and an upper flange 5 are sequentially installed on the outside of the lower flange 6, and fastening bolts 8 are installed on the outside of the upper flange 5 and the diaphragm 7 to ensure the stability of the upper flange 5 when installed outside the lower flange 6. After the motor body 1 is installed outside the motor base 3, the motor body 1 drives the motor shaft 4 to extend into the interior of the upper flange 5, while the connecting sleeve 2... When the motor body 1 and the motor base 3 are spliced ​​together, they are fixed. When the motor installed inside the motor body 1 is started, the motor drives the motor shaft 4 to rotate. When the motor shaft 4 rotates, it drives the pump shaft 9 to rotate through the upper flange 5 and the lower flange 6. The diaphragm 7 elastically deforms to compensate for the deviation between the shafts, so as to avoid wear during the use of the equipment and damage to the connection. At the same time, when the pump shaft 9 rotates, the pump shaft 9 drives the mechanical seal chamber 11 to rotate. The mechanical seal chamber 11 drives the liquid to form centrifugal force. The centrifugal force drives the liquid to be absorbed through the inlet 13 and discharged through the outlet 12.

[0026] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A centrifugal pump single diaphragm coupling, comprising a motor body (1), wherein a motor base (3) is mounted on one end of the motor body (1) via a connecting sleeve (2), and a motor shaft (4) is fixedly connected to one end of the motor body (1), characterized in that: The motor shaft (4) is externally fitted with an upper flange (5), and a lower flange (6) is installed on one side of the upper flange (5). A diaphragm (7) is installed between the upper flange (5) and the lower flange (6). A pump shaft (9) is internally fitted with the lower flange (6). Two sets of nuts (10) are threaded onto one end of the pump shaft (9), and the other end of the pump shaft (9) is fixedly connected to an organic seal chamber (11). Slide grooves (16) are provided inside the upper flange (5) and the lower flange (6).

2. The centrifugal pump single diaphragm coupling according to claim 1, characterized in that: The lower part of the motor base (3) is equipped with a water outlet (12) and a water inlet (13). The water inlet (13) is connected to a water inlet pipe, and the water outlet (12) is connected to a water outlet pipe.

3. The centrifugal pump single diaphragm coupling according to claim 1, characterized in that: A sealing assembly (14) is installed between the mechanical seal chamber (11) and the pump shaft (9), and the sealing assembly (14) is disposed inside the mechanical seal chamber (11).

4. The centrifugal pump single diaphragm coupling according to claim 1, characterized in that: The motor shaft (4) and pump shaft (9) are equipped with sliders on the outside, and the sliders are movably sleeved inside the slide groove (16).

5. The centrifugal pump single diaphragm coupling according to claim 1, characterized in that: The upper flange (5) and the lower flange (6) are fitted with fastening bolts (8), which penetrate the interior of the diaphragm (7).

6. The centrifugal pump single diaphragm coupling according to claim 1, characterized in that: The upper flange (5) is internally connected to a sealing sleeve (15), which is located at the front end of the motor shaft (4).

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