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CN-224228924-U - Single diaphragm coupling for centrifugal pump

CN224228924UCN 224228924 UCN224228924 UCN 224228924UCN-224228924-U

Abstract

The utility model relates to the technical field of centrifugal pumps, and discloses a centrifugal pump single-diaphragm coupler which comprises a motor main body, wherein a motor base is arranged at one end of the motor main body through a connecting sleeve, a motor shaft is fixedly connected at one end of the motor main body, an upper flange is movably sleeved outside the motor shaft, a lower flange is arranged at one side of the upper flange, a diaphragm is arranged between the upper flange and the lower flange, a pump shaft is movably sleeved inside the lower flange, two groups of nuts are arranged at one end of the pump shaft in a threaded manner, and an organic sealing chamber is fixedly connected at the other end of the pump shaft. The single-diaphragm coupling of the centrifugal pump is sleeved and connected with the outside of a pump shaft through the lower flange through the nut, the diaphragm is arranged between the upper flange and the lower flange, the motor main body drives the motor shaft to be arranged in the upper flange, the deviation between shafting is compensated through the elastic deformation of the metal diaphragm, and the single-diaphragm coupling has the characteristics of no abrasion, no maintenance, high reliability and the like, and the service life of equipment is prolonged.

Inventors

  • LU YUN
  • LIU ZHUJUN
  • HUANG CHUNHUA
  • QIAN YI
  • SUN MIN

Assignees

  • 张家港市太平洋泵业制造有限公司

Dates

Publication Date
20260512
Application Date
20250512

Claims (6)

  1. 1. The single-diaphragm coupling of the centrifugal pump comprises a motor main body (1), wherein a motor base (3) is arranged at one end of the motor main body (1) through a connecting sleeve (2), a motor shaft (4) is fixedly connected to one end of the motor main body (1), and the single-diaphragm coupling is characterized in that an upper flange (5) is movably sleeved outside the motor shaft (4), a lower flange (6) is arranged on one side of the upper flange (5), a diaphragm (7) is arranged between the upper flange (5) and the lower flange (6), a pump shaft (9) is movably sleeved inside the lower flange (6), two groups of nuts (10) are arranged at one end of the pump shaft (9) in a threaded mode, an organic sealing chamber (11) is fixedly connected to the other end of the pump shaft (9), and a sliding groove (16) is formed in the inner parts of the upper flange (5) and the lower flange (6).
  2. 2. The centrifugal pump single-diaphragm coupling according to claim 1, wherein a water outlet (12) and a water inlet (13) are arranged at the lower part of the motor base (3), the water inlet (13) is connected with a water inlet pipeline, and a water outlet pipeline is connected to the outside of the water outlet (12).
  3. 3. A centrifugal pump single-diaphragm coupling according to claim 1, wherein a sealing assembly (14) is mounted between the machine seal chamber (11) and the pump shaft (9), and the sealing assembly (14) is arranged inside the machine seal chamber (11).
  4. 4. The centrifugal pump single-diaphragm coupling according to claim 1, wherein the outer parts of the motor shaft (4) and the pump shaft (9) are provided with sliding blocks, and the sliding blocks are movably sleeved in the sliding grooves (16).
  5. 5. A centrifugal pump single-diaphragm coupling according to claim 1, characterized in that the inside of the upper flange (5) and the lower flange (6) are provided with fastening bolts (8), and the fastening bolts (8) penetrate the inside of the diaphragm (7).
  6. 6. The centrifugal pump single-diaphragm coupling according to claim 1, wherein the upper flange (5) is internally connected with a sealing sleeve (15), and the sealing sleeve (15) is positioned at the front end of the motor shaft (4).

Description

Single diaphragm coupling for centrifugal pump Technical Field The utility model relates to the technical field of centrifugal pumps, in particular to a single-diaphragm coupling of a centrifugal pump. Background Centrifugal pumps operate by using the rotation of a sealed chamber to cause centrifugal movement of water. Before the water pump is started, the motor seat and the water suction pipe are filled with water, then the motor is started, the pump shaft carries the motor sealing chamber and the water to do high-speed rotation, the water is centrifugally moved and thrown to the outer edge of the motor sealing chamber, and the water flows into the water pressing pipeline of the water pump through the flow channel of the volute motor seat. When the centrifugal pump is assembled, a motor is required to be installed on one side of the machine seal chamber, and in order to improve convenience in installation between the motor and the machine seal chamber, a coupler is installed at a joint, the coupler drives a motor shaft and a pump shaft to be mutually spliced, bolts are generally adopted for fixing, but when the motor is driven, the motor drives a motor shaft to torque, the torque is applied to the coupler, deformation is caused after the coupler continuously receives the torque, so that the coupler is damaged, the service life of the coupler is prolonged, and a single-diaphragm coupler of the centrifugal pump is provided. Disclosure of utility model The utility model provides a single-diaphragm coupling of a centrifugal pump, which aims at overcoming the defects of the existing single-diaphragm coupling of the centrifugal pump, and is provided with a diaphragm arranged between an upper flange and a lower flange. The utility model provides a single-diaphragm coupling of a centrifugal pump, which comprises a motor main body, wherein one end of the motor main body is provided with a motor seat through a connecting sleeve, one end of the motor main body is fixedly connected with a motor shaft, the outside of the motor shaft is movably sleeved with an upper flange, one side of the upper flange is provided with a lower flange, a diaphragm is arranged between the upper flange and the lower flange, the inside of the lower flange is movably sleeved with a pump shaft, one end of the pump shaft is provided with two groups of nuts in a threaded manner, the other end of the pump shaft is fixedly connected with an organic sealing chamber, and the inside of the upper flange and the inside of the lower flange are provided with sliding grooves. Preferably, a water outlet and a water inlet are arranged at the lower part of the motor, the water inlet is connected with a water inlet pipeline, and a water outlet pipeline is connected with the outside of the water outlet. Preferably, a sealing assembly is arranged between the machine sealing chamber and the pump shaft, and the sealing assembly is arranged on one side of the machine sealing chamber. Preferably, the outer parts of the motor shaft and the pump shaft are provided with sliding blocks, and the sliding blocks are movably sleeved in the sliding grooves. Preferably, the upper flange and the lower flange are internally provided with fastening bolts, and the fastening bolts penetrate through the inside of the diaphragm. Preferably, a sealing sleeve is connected to the upper flange, and the sealing sleeve is located at the front end of the motor shaft. Compared with the existing coupler, the utility model has the following beneficial effects: The single-diaphragm coupling of the centrifugal pump is sleeved and connected with the outside of a pump shaft through the lower flange through the nut, the diaphragm is arranged between the upper flange and the lower flange, the motor main body drives the motor shaft to be arranged in the upper flange, the deviation between shafting is compensated through the elastic deformation of the metal diaphragm, and the single-diaphragm coupling has the characteristics of no abrasion, no maintenance, high reliability and the like, and the service life of equipment is prolonged. Drawings FIG. 1 is a schematic cross-sectional view of the present utility model; FIG. 2 is an enlarged schematic view of the connecting shaft structure of the present utility model; FIG. 3 is a schematic cross-sectional view of the coupling structure of the present utility model; fig. 4 is an enlarged schematic view of the structure of fig. 1 a according to the present utility model. The motor comprises a motor main body 1, a connecting sleeve 2, a motor seat 3, a motor shaft 4, an upper flange 5, a lower flange 6, a diaphragm 7, a fastening bolt 8, a fastening bolt 9, a pump shaft 10, a nut 11, a machine sealing chamber 12, a water outlet 13, a water inlet 14, a sealing component 15, a sealing sleeve 16 and a chute. Detailed Description The following description of the embodiments of the present utility model will be made clearly and completely with reference to the