How to do the temperature rise design and gas circuit optimization of high temperature magnetic pump to enhance?

Time：2022/6/5 12:40:21 Category：TECHNICAL ARTICLE Source： Click：

High temperature magnetic pump is a combination of a series of specific products, which are widely used in petrochemical, pharmaceutical, aerospace, environmental protection and other fields. Its concentration solves the transportation problem of all kinds of flammable, explosive, corrosive and other special media, which can be said to have obvious role and broad market prospect.

High-temperature magnetic pump adopts multiple circulation cooling structure to ensure the reliability and stability of the primary power and magnetic transmission, while using the column pin coupling to reduce the noise and vibration of the pump, the convenient dismantling and column pin coupling used at the same time, so that the structure of the magnetic pump grows and is more conducive to the heat dissipation of the magnetic pump. At the same time, it is also very convenient for users to repair or replace parts. The outer rotor part of the magnetic pump is also designed with heat dissipation air vane to ensure the stability of the magnet steel. This series of high-temperature resistant magnetic pump is suitable for conveying high-temperature media with temperature ≤300℃.

Which two points should we pay more attention to when operating the high temperature magnetic pump?

1、Starting procedure

The model of magnetic coupling is selected according to the driving motor so as to achieve normal operation, but starting under unsuitable conditions, (such as excessive motor power, excessive opening of the outlet valve or higher voltage, etc.), will exceed the maximum torque of the magnetic coupling and make the pump unable to operate normally, so pay attention to the correct start must be made. a. Completely open the valve of the inlet pipeline; b. Close the valve of the outlet pipeline; c. Start the motor; d. Slowly open the valve in the outlet pipeline; e. Adjust the outlet valve until the normal working pressure is reached; f. In order to make the pump operate normally, the pump should be made to work within its allowable range.

2、Fill and exhaust

In order to make the magnetic pump can operate normally, it must be fully filled and exhausted. The valve in the pump inlet pipeline and return pipeline and outlet pipeline will be opened completely to realize the automatic exhaust of the magnetic pump. When conveying liquefied gas or easily vaporized liquid, exhaust several times repeatedly until the pump is full of liquid. If transporting low-temperature liquid, wait until the overflow parts of the pump are cooled to the temperature of the liquid before starting, so as to ensure that the fluid has reached all parts of the pump.

High-temperature magnetic pump gas circuit optimization and improvement of the cause analysis.

Design magnetic pump temperature rise cause is mainly due to the bearings, internal magnetic rotor and isolation cover in the operation of the pump will generate heat, so that the pump operating temperature rises. Temperature rise on the one hand makes the transmitted power drop, on the other hand, the pump that conveys easily vaporized media will produce great trouble. Therefore, the magnetic pump should be designed with a reliable cooling system. Since the coolant itself is liquefied petroleum gas which is easy to vaporize, once the circulating coolant vaporizes, if it returns to the impeller inlet of the magnetic pump, it will lead to vapor blockage, thus affecting the normal work of the magnetic pump.

Therefore, this pump adopts reverse circulation structure, the liquid flow is led to the liquid storage tank outside the pump, and the possible bubbles are brought to the gas phase part of the storage tank to avoid the heat from returning to the suction population, and at the same time, a gas venting pipe is installed, and the outlet is placed in the pump outlet pipeline and a needle valve is added so as to play the role of gas venting, flow regulation and temperature reduction. Author: elainefly https://www.bilibili.com/read/cv16751044 From: bilibili