CN211314569U

CN211314569U - Water pump with improved dynamic balance

Info

Publication number: CN211314569U
Application number: CN201921609637.5U
Authority: CN
Inventors: 汪明泽; 缪冠刚; 叶龙; 茅建勇
Original assignee: Zhejiang Shimge Pump Co Ltd
Current assignee: Zhejiang Shimge Pump Co Ltd
Priority date: 2019-09-25
Filing date: 2019-09-25
Publication date: 2020-08-21
Anticipated expiration: 2029-09-25

Abstract

The utility model relates to an improvement dynamic balance's water pump solves prior art and does not handle intermediate shaft or switching pump shaft self dynamic balance and has the problem of dynamic unbalance, the technical scheme of adoption: including the motor, with motor shaft complex pump shaft, set up epaxial impeller of pump, pump shaft and motor shaft cooperation shaft coupling, its characterized in that the barycenter of impeller is located the impeller axis, the barycenter of shaft coupling is located the pump shaft axis, the impeller axis with the pump shaft axis coaxial line. The method has the following effects: the dynamic balance of the impeller is considered, the impeller with the dynamic balance is adopted, the dynamic balance among the matching of the pump shaft, the motor rotating shaft and the coupler is also considered, and the dynamic balance processing is adopted, so that the mass center of the matching position of the pump shaft, the motor rotating shaft and the coupler is positioned on the axis of the pump shaft. The dynamic balance of the pump can be further improved, the vibration and noise during the operation of the pump can be effectively reduced, and the performance and the service life of the pump are improved.

Description

Water pump with improved dynamic balance

Technical Field

The utility model relates to a water pump especially relates to a water pump of improvement dynamic balance.

Background

The horizontal (vertical) single-stage single-suction centrifugal pump is a split water pump (split means that the middle of a pump body shaft and the middle of a motor shaft are connected through a coupler; and the corresponding direct connection means that a water pump impeller is directly arranged on the motor shaft). The pump shaft and the motor shaft are positioned by a key on the motor shaft and a key groove of the pump and then locked by a fastening screw at the concave end of the inner hexagon. The impeller is connected through the pump shaft, so that the mechanical energy of the motor drives the impeller to supply water to do work.

The vibration failure of the high-speed rotating machine is 70% of the vibration failure of the high-speed rotating machine which is caused by the unbalance of a rotor system (parts such as a coupling, a pump shaft and an impeller belong to main parts of the rotor system), and the dynamic balance of the high-speed rotating machine is greatly influenced by materials. In the split water pump structure, unbalance (such as centrifugal force and centrifugal couple) is generated when the rotor system rotates, and the unbalance can cause the transverse traction force of the rotor and cause the rotor to be subjected to unnecessary dynamic load.

At present, the single-stage split water pump can test the dynamic balance amount of the impeller, and the mass center of the impeller is ensured to be on a rotating shaft line by digging off part of the material on the impeller to achieve the dynamic balance of the impeller. The dynamic balance adjustment problem of the intermediate coupling or the transfer pump shaft is not considered, so that the unbalance of the whole water pump during operation cannot be completely eliminated.

However, for the pump shaft, even if the circular symmetric object can also generate unbalance amount due to the problems of materials and the like, the pump shaft needs to be matched with the motor shaft, the key groove and the threaded hole are formed in the pump shaft, and although the key on the motor shaft and the material removed by the key groove and the threaded hole are supplemented by the inner hexagonal concave end set screw, the unbalanced state of the dynamic balance of the pump shaft cannot be offset, so that the center of mass of the pump shaft is necessarily deviated from the rotating axis, and the dynamic balance of the pump shaft is not taken into consideration in the measurement and balance of the impeller. The assembled rotor system is not dynamically balanced.

Disclosure of Invention

An object of the utility model is to solve the above-mentioned problem that prior art exists and provide a water pump of improvement dynamic balance, not only consider the dynamic balance of impeller, adopt the impeller that has dynamic balance, still consider the dynamic balance that exists between pump shaft, motor shaft and the cooperation of shaft coupling three, can further improve the dynamic balance of pump, can effectively reduce vibrations and noise when the pump operation, promote pump performance and life.

The above technical purpose of the present invention is mainly solved by the following technical solutions: the water pump of improvement dynamic balance, include motor, the pump body, with motor shaft complex pump shaft, set up epaxial impeller of pump, pump shaft and motor shaft pass through the shaft coupling cooperation, its characterized in that the barycenter of impeller is located the impeller axis, the barycenter of shaft coupling is located the pump shaft axis, the impeller axis with the pump shaft axis coaxial line. The dynamic balance of the impeller is considered, the impeller with the dynamic balance is adopted, the dynamic balance among the matching of the pump shaft, the motor rotating shaft and the coupler is also considered, and the dynamic balance processing is adopted, so that the mass center of the matching position of the pump shaft, the motor rotating shaft and the coupler is positioned on the axis of the pump shaft. The dynamic balance of the pump can be further improved, the vibration and noise during the operation of the pump can be effectively reduced, and the performance and the service life of the pump are improved.

As further improvement and supplement to the above technical scheme, the utility model discloses a following technical measure: the shaft coupling comprises two half-shaft couplings, and the two half-shaft couplings are used for enabling the pump shaft and the motor rotating shaft to be connected together in a cohesion mode. The coupler adopts: the dynamic balance quantity of the coupler is tested and corrected, so that the center of mass of the coupler returns to the coupler on the axis of the motor rotating shaft (pump shaft) as much as possible. And the pump shaft and the motor rotating shaft are easy to perform dynamic balance correction, so that the dynamic balance effect can be greatly improved by adopting the coupler, the pump shaft, the motor rotating shaft and the impeller after mass center correction, the transverse traction force in the use process is reduced, and the purpose of dynamic balance is achieved. The rotor system is in a dynamic balance state, so that the rotor system can avoid generating transverse traction force when rotating and moving at a high speed, avoid receiving unnecessary dynamic load, effectively reduce noise and vibration generated when the water pump is used, avoid faults generated due to vibration, improve the efficiency of the water pump and prolong the service life of the water pump.

The pump shaft is provided with a through pin hole, a pin shaft is arranged in the pin hole, and two ends of the pin shaft are respectively matched with the corresponding half couplers. The pin holes are formed by fully considering the dynamic balance of the pump shaft, and meanwhile, the length and the diameter of the pin shaft are small, so that the dynamic balance is easy to drive, and therefore the dynamic balance can be further ensured by connecting the pump shaft and the motor rotating shaft through the pin holes and the pin shaft in a coupling mode.

The utility model discloses beneficial effect who has: 1. the dynamic balance of the impeller is considered, the impeller with the dynamic balance is adopted, the dynamic balance among the matching of the pump shaft, the motor rotating shaft and the coupler is also considered, and the dynamic balance processing is adopted, so that the mass center of the matching position of the pump shaft, the motor rotating shaft and the coupler is positioned on the axis of the pump shaft. The dynamic balance of the pump can be further improved, the vibration and noise during the operation of the pump can be effectively reduced, and the performance and the service life of the pump are improved. 2. The coupler, the pump shaft, the motor rotating shaft and the impeller after mass center correction are adopted, so that the dynamic balance effect can be greatly improved, the transverse traction force in the use process is reduced, and the purpose of dynamic balance is achieved. 3. The pin holes are formed by fully considering the dynamic balance of the pump shaft, and meanwhile, the length and the diameter of the pin shaft are small, so that the dynamic balance is easy to drive, and therefore the dynamic balance can be further ensured by connecting the pump shaft and the motor rotating shaft through the pin holes and the pin shaft in a coupling mode.

Drawings

Fig. 1 is a schematic view of a cross-sectional partial structure of the present invention.

Detailed Description

The technical solution of the present invention is further specifically described below by way of examples and with reference to the accompanying drawings.

Example (b): as shown in fig. 1, the water pump with improved dynamic balance comprises a motor, a pump body, a pump shaft 2 matched with a motor rotating shaft 1 and an impeller 3 arranged on the pump shaft, wherein the pump shaft and the motor rotating shaft are matched through a coupler 4, the mass center of the impeller is positioned on an impeller axis, the mass center of the coupler is positioned on a pump shaft axis, and the impeller axis and the pump shaft axis are coaxial. The dynamic balance of the impeller is considered, the impeller with the dynamic balance is adopted, the dynamic balance among the matching of the pump shaft, the motor rotating shaft and the coupler is also considered, and the dynamic balance processing is adopted, so that the mass center of the matching position of the pump shaft, the motor rotating shaft and the coupler is positioned on the axis of the pump shaft. The dynamic balance of the pump can be further improved, the vibration and noise during the operation of the pump can be effectively reduced, and the performance and the service life of the pump are improved.

As further improvement and supplement to the above technical scheme, the utility model discloses a following technical measure: the shaft coupling 4 comprises two half shaft couplings, and the two half shaft couplings are used for enabling the pump shaft and the motor rotating shaft to be connected together in a clasping mode. The coupler adopts: the dynamic balance quantity of the coupler is tested and corrected, so that the center of mass of the coupler returns to the coupler on the axis of the motor rotating shaft (pump shaft) as much as possible. And the pump shaft and the motor rotating shaft are easy to perform dynamic balance correction, so that the dynamic balance effect can be greatly improved by adopting the coupler, the pump shaft, the motor rotating shaft and the impeller after mass center correction, the transverse traction force in the use process is reduced, and the purpose of dynamic balance is achieved. The rotor system is in a dynamic balance state, so that the rotor system can avoid generating transverse traction force when rotating and moving at a high speed, avoid receiving unnecessary dynamic load, effectively reduce noise and vibration generated when the water pump is used, avoid faults generated due to vibration, improve the efficiency of the water pump and prolong the service life of the water pump.

The pump shaft 2 is provided with a through pin hole 21, a pin shaft 5 is arranged in the pin hole 21, and two ends of the pin shaft are respectively matched with the corresponding half couplers. The pin holes are formed by fully considering the dynamic balance of the pump shaft, and meanwhile, the length and the diameter of the pin shaft are small, so that the dynamic balance is easy to drive, and therefore the dynamic balance can be further ensured by connecting the pump shaft and the motor rotating shaft through the pin holes and the pin shaft in a coupling mode.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention. In the above embodiments, the present invention may be variously modified and changed. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The water pump of improvement dynamic balance, include motor, the pump body, with motor shaft complex pump shaft, set up epaxial impeller of pump, pump shaft and motor shaft pass through the shaft coupling cooperation, its characterized in that the barycenter of impeller is located the impeller axis, the barycenter of shaft coupling is located the pump shaft axis, the impeller axis with the pump shaft axis coaxial line.

2. The improved dynamic balance water pump of claim 1 wherein said coupling comprises two coupling halves which engage to couple said pump shaft and said motor shaft together.

3. The improved dynamic balance water pump as claimed in claim 2, wherein said pump shaft has a through pin hole, said pin hole has a pin shaft, and two ends of said pin shaft are respectively engaged with said corresponding half-couplings.