CN-122014682-A - Cooling device for magnetic suspension high-speed pump

Abstract

The invention relates to a cooling device for a magnetic suspension high-speed pump, which comprises a pump body, an inducer, a volute, an impeller, a pump cover, a sealing body, a shaft sleeve, a magnetic suspension motor and a cooling jacket integrated in the pump body, wherein a sleeve-type cooling flow passage surrounding the heating areas of the shaft and the shaft sleeve and the impeller and the sealing body is formed in the cooling jacket, a cooling medium inlet and a cooling medium outlet which are communicated with the sleeve-type cooling flow passage are formed in the cooling jacket, and the cooling medium inlet and the cooling medium outlet are connected with an external cooling loop through pipe joints. The invention directly integrates the cooling flow channel in the pump cover, thereby greatly simplifying the whole structure, reducing the number of parts and reducing the manufacturing cost and potential fault points. The sleeve type flow passage design increases the heat exchange area, the turbulence structure strengthens the heat exchange process, and heat can be quickly and uniformly taken away. The invention has compact structure, small change to the existing magnetic suspension pump and easy adaptation.

Inventors

• XU HU
• LI SHIKANG
• WANG YANHE
• LI TONGXIAN
• HOU DUOHUA
• ZHANG ZHONGNAN

Assignees

• 上海凯泉泵业（集团）有限公司

Dates

Publication Date

20260512

Application Date

20260212

Claims (7)

1. 1. A cooling device for a magnetic suspension high-speed pump is characterized in that the cooling device for the magnetic suspension high-speed pump is characterized in that: the device comprises a pump body, an inducer, a volute, an impeller, a pump cover, a sealing body, a shaft sleeve, a magnetic suspension motor and a cooling jacket integrated in the pump body; a sleeve type cooling flow passage surrounding the heating areas of the shaft, the shaft sleeve, the impeller and the sealing body is formed in the cooling jacket; The cooling jacket is provided with a cooling medium inlet and a cooling medium outlet which are communicated with the sleeve-type cooling flow passage; The cooling medium inlet and the cooling medium outlet are connected with an external cooling circuit through a pipe joint.
2. 2. A cooling device for a magnetic levitation high speed pump according to claim 1, wherein the sleeve-type cooling flow passage has a cross section of two rectangles with rounded corners symmetrical about the axis, and turbulence ribs for swirling the cooling medium are provided on the flow passage wall surface.
3. 3. A cooling device for a magnetic levitation high-speed pump according to claim 2, wherein the shape of the turbulence ribs is cylindrical or conical.
4. 4. The cooling device for the magnetic levitation high-speed pump of claim 1, wherein the cooling jacket is made of a metal material with good heat conduction performance, is fixedly connected with the pump cover in an integral forming manner, and is fixedly connected with the shaft, the impeller, the sealing body and the magnetic levitation motor on the same shaft surface.
5. 5.A cooling device for a magnetic levitation high speed pump according to claim 1, wherein the cooling jacket is melt-cast with the pump cover, and the cooling medium inlet and the cooling medium outlet are provided with standard pipe joints by means of screw connection.
6. 6. The cooling device for a magnetically levitated high-speed pump according to claim 1, further comprising temperature sensors distributed inside the volute, the pump cover and the sealing body, wherein the temperature sensors are electrically connected with an external control system for monitoring the temperature of the motor in real time and adjusting the flow rate of the external cooling circuit.
7. 7. The cooling device for a magnetic levitation high-speed pump according to claim 1, wherein the cooling medium inlet and the cooling medium outlet are directly connected with a centralized cooling water pipe network of a factory to form a closed circulation system.

Description

Cooling device for magnetic suspension high-speed pump Technical Field The invention relates to a cooling device, in particular to a cooling device for a magnetic suspension high-speed pump, which has the advantages of high integration, high-efficiency heat dissipation, uniform temperature control and compact structure. Background The magnetic suspension pump, such as a magnetic suspension bearingless pump, a magnetic suspension turbine vacuum pump, a magnetic suspension molecular pump and the like, realizes the non-contact and friction-free suspension operation of the rotor by adopting a magnetic suspension bearing technology, has the remarkable advantages of high efficiency, energy conservation, long service life and the like, and is widely applied to the fields of semiconductors, chemical industry, vacuum acquisition and the like. However, the magnetic suspension motor and the pump body can generate a large amount of heat during high-speed operation, if the heat cannot be timely dissipated, the temperature of the device is excessively increased, the control precision of the motor and the hydraulic performance of the impeller are affected, and even equipment is failed or damaged. At present, the cooling mode for the magnetic suspension pump mainly comprises two modes of air cooling and water cooling. The traditional air cooling scheme adopts an external fan more, as shown in the patent with publication number CN218542636U, the external fan is integrated with the pump body, although the installation is simplified, the air cooling heat dissipation capacity is limited, and particularly under the working condition of high temperature or high load, the requirement of rapid cooling is difficult to meet. However, as shown in the patent publication CN116950933B, the conventional water cooling scheme generally requires a separate circulation pump, water tank, radiator and control system to form a complex water cooling system. The scheme has strong heat-dissipation capability, but introduces additional power units, control units and a large number of pipeline joints, so that the volume, cost and power consumption of the whole equipment are increased, and the reliability of the system is reduced due to the increase of components. Once the independent water cooling system fails (such as the water pump stops), the magnetic levitation motor will be rapidly damaged due to overheating. In addition, the device of partial magnetic suspension pump is designed with a concave structure (such as a mounting groove), and the air circulation in these areas is not smooth, so that the device becomes a heat dissipation dead angle, and the risk of local overheating is further aggravated. Therefore, there is a need for a cooling solution that is simple in construction, efficient, reliable and capable of deep integration with a pump device. Therefore, we propose a cooling device for a magnetic levitation high-speed pump in order to solve the above-mentioned problems. Disclosure of Invention Aiming at the problems, the main purpose of the invention is to provide a cooling device for a magnetic suspension high-speed pump, which has high integration, high-efficiency heat dissipation, uniform temperature control and compact structure. The invention solves the technical problems by the following technical scheme that the cooling device for the magnetic suspension high-speed pump comprises: the device comprises a pump body, an inducer, a volute, an impeller, a pump cover, a sealing body, a shaft sleeve, a magnetic suspension motor and a cooling jacket integrated in the pump body. And a sleeve type cooling flow passage surrounding the heating areas of the shaft, the shaft sleeve, the impeller and the sealing body is formed in the cooling jacket. And the cooling jacket is provided with a cooling medium inlet and a cooling medium outlet which are communicated with the sleeve-type cooling flow passage. The cooling medium inlet and the cooling medium outlet are connected with an external cooling circuit through a pipe joint. In a specific embodiment of the present invention, the cross section of the sleeve-type cooling flow channel is two rectangles with round corners at one angle symmetrical about the axis, and turbulence ribs for enabling the cooling medium to generate vortex are arranged on the wall surface of the flow channel. In the embodiment of the invention, the shape of the turbulence rib is cylindrical or conical. In the specific embodiment of the invention, the cooling jacket is made of a metal material with good heat conduction performance, is fixedly connected with the pump cover in an integral forming mode, and is fixedly connected with the shaft, the impeller, the sealing body and the magnetic suspension motor on the same shaft surface. In the specific embodiment of the invention, the cooling jacket and the pump cover are fused and cast into a whole, and the cooling medium inlet and the cooling medium outlet are respectively provid