Generally speaking, the water ring vacuum pump in normal operation will not have any problems, but this is not allowed. Sometimes, the pump in normal operation will suddenly stop running, and this situation is not caused for no reason. There are still many reasons: 1. The power failure may also be the reason why the water ring vacuum pump suddenly does not run. First check its power supply to see if it is powered off, eliminate the fault in time and restore the power supply. 2. The reason why the water ring vacuum pump suddenly does not run may be that the control protection switch of the vacuum pump trips. The main reason for the control protection switch tripping is that the vacuum pump is damaged during operation or due to overload of the vacuum pump motor. The treatment method for the sudden non rotation of the vacuum pump is to measure the insulation resistance of the vacuum pump motor first, and check whether the stator winding of the vacuum pump motor is damaged and whether other parts are damaged. 3. The broken core wire of the power supply cable of the water ring vacuum pump may also be the reason for the sudden non rotation of the vacuum pump. The treatment method for the sudden non rotation of the vacuum pump is to connect the broken core wire of the motor power supply cable and wrap it with insulating tape. If the connection repaired after the power supply cable is broken needs to be immersed in water, the cable shall be treated or replaced according to the waterproof connection and sealing requirements of the cable joint. 4. The action of the thermal protector of the water ring vacuum pump may also be the reason for the sudden non rotation of the vacuum pump: the main reason for the action of the thermal protector of the vacuum pump is the overload of the vacuum pump or the poor heat dissipation or dehydration operation of the vacuum pump motor; Or it is caused by malfunction of thermal protector. The treatment method is to check the cause of the action of the thermal protector and eliminate it, waiting for its automatic reset or repair and adjustment. 5. The stator winding of the water ring vacuum pump is burnt out, which may also be the cause of the sudden non rotation of the vacuum pump. If it is found that the stator winding of the vacuum pump is burnt out, first check the cause of the damage of the stator winding and eliminate the fault to prevent the motor stator winding from being damaged again; Then disassemble and repair the motor stator winding and replace the damaged stator winding as required. 7. There may also be the reason why the motor is burnt out due to water ingress caused by medium corrosion. The liquid is corrosive. It is recommended to use stainless steel. Therefore, once the water ring vacuum pump used by everyone has such a situation, what to do is always careful and careful inspection. The inspection results determine which way we will choose to deal with it, so that we can continue to use the vacuum pump. Vacuum unit-vacuum pump preventive maintenance

The screw vacuum pump must be installed in a position with ventilation and keep the pump body at a certain level to ensure smooth operation and low vibration of the vacuum pump; The exhaust nozzle of the screw vacuum pump is connected to the outdoor with a leather pipe to avoid oil vapor polluting the environment and reduce pollution. So how much do you know about the causes of screw vacuum pump wear? Here are some reasons for the wear of screw vacuum pump, including the following aspects: The operation of screw vacuum pump is relatively stable in the actual use process, but some users react that serious wear occurs when the vacuum pump runs for a long time, and serious wear affects the production and use effect of vacuum pump. At this time, we should understand the causes of wear, and then reduce wear as much as possible. 《1》 Because the material is not plasticized uniformly, or metal foreign matters are mixed in the speculation, the rolling torque of the screw of the screw vacuum pump is suddenly added, which exceeds the strength bearing capacity of the screw, resulting in wear. 《2》 When granular plastics enter the barrel from the hopper, they will first reach the feed section. Dry friction is inevitable in the feeding part. When these plastics lack heat and melt unevenly, it is easy to form the inner wall of the screw vacuum pump barrel and the external wear of the screw increases. 《3》 If there are fillers such as calcium carbonate and glass fiber, the wear of screw and barrel can be accelerated. 《4》 In the shrinkage and homogenization part, if the melting state of the plastic is disordered and uneven, the wear will increase. 《5》 Because some plastics are reinforced, such as glass fiber, minerals or other fillers. Compared with molten plastics, these substances have greater friction against metal materials. 《6》 The screw of screw vacuum pump rolls in the barrel, and the conflict between materials and barrel leads to the gradual wear of the working appearance of screw and barrel. The diameter of the screw decreases gradually and the diameter of the inner hole of the cylinder increases gradually. In this way, with the gradual wear of the screw and barrel, the diameter gap between the screw and barrel gradually increases. 《7》 If high-speed conversion is used to increase the shear force of plastic during injection molding, it will also produce corresponding tear fibers in the reinforcement. The torn fiber contains sharp ends, which will greatly increase the wear force. 《8》 When inorganic minerals slide at high speed on the metal surface, their scraping effect is not small. So the speed should not be too high. 《9》 Since the resistance of the head and deflector in front of the barrel does not change, the leakage flow of extruded material is increased, that is, the material flow increases from the diameter gap to the feed direction. 2X-A Two Stage Rotary Vane Piston Pump used in District Cooling

Air extraction The pumping volume is a measure factor of the pumping speed of vacuum pump. General units are L / s and m ³/ H. It is a parameter to make up for the air leakage rate. It is not difficult to understand why a vacuum pump with large air volume can easily pump the vacuum we need, while a vacuum pump with small air volume is very slow or even unable to pump the vacuum we want? The pipeline or container can never be absolutely free of air leakage, and the large air extraction makes up for the decrease of vacuum caused by air leakage, and the air volume can easily reach the ideal vacuum value. Vacuum pump vacuum degree It indicates the degree of gas dilution under vacuum, which is usually expressed by pressure value. The vacuum degree value indicates that the actual value of the system pressure is lower than the atmospheric pressure. The value expressed from the table is also called the table pressure, which is also called the limit relative pressure in the industry. In practical application, the vacuum degree usually has two versions: absolute vacuum and relative vacuum. The value read from the vacuum gauge is called vacuum degree. Vacuum degree = atmospheric pressure - absolute pressure (the atmospheric pressure is generally 101325pa, and the ultimate absolute pressure of water ring vacuum pump is 3300pa; Limit absolute pressure of rotary vane vacuum pump (about 10Pa) Vacuum Theoretically, it means that there is no substance in the volume. In reality, there is no real vacuum. Generally, the pressure in the container lower than the normal atmospheric pressure (101325 PA) is called vacuum state. Absolute vacuum and relative vacuum Limit relative pressure The relative pressure is how much lower the measured internal pressure is than the "atmospheric pressure". It shows that the actual value of system pressure is lower than the value of atmospheric pressure. Because the air inside the container is pumped, the internal pressure is always lower than the external pressure of the container. When expressed by relative pressure or gauge pressure, the value must be preceded by a negative sign, indicating that the internal pressure of the container is lower than the external pressure. Ultimate absolute pressure Absolute pressure is how much higher the measured internal pressure is than "theoretical vacuum (theoretical vacuum pressure value is 0Pa)". It compares the absolute vacuum pressure of the theoretical state. Due to the limitation of process, we can't pump the internal pressure to the value of absolute vacuum 0Pa in any case. The vacuum value pumped by the vacuum pump is higher than the theoretical vacuum value. Therefore, when expressed in absolute vacuum, there is no negative sign in front of the value. vacuum pump in semiconductor remover application

First of all, we should have a more comprehensive understanding of all aspects of the tested object. It mainly includes: the properties of the tested object, whether it is condensable gas or non condensable gas, whether it is single or mixed, inert gas or active gas or corrosive gas; Whether the air flow state is steady or instantaneous, whether it is uniform or non-uniform; Whether the temperature is isothermal or non isothermal, high temperature or low temperature; Whether there are special conditions such as magnetic field, electric field, vibration, impact, acceleration, charged particles, radiation, etc. Secondly, according to the situation of the tested object and the research purpose, correctly select the vacuum gauge, and need to understand the principle, range and limitations of the selected vacuum gauge, so as to use the vacuum gauge correctly. Third, we should understand the interaction between the vacuum gauge and the measured object. The principles of various vacuum gauges are different, and its introduction may cause changes in some states of the measured object; At the same time, the gas in the measured object may also affect the vacuum gauge, change its performance and interfere with its work. Moreover, when introducing the technical characteristics of vacuum measurement, fozhen has mentioned that the measurement accuracy of vacuum measurement is not high due to many influencing factors and difficult to control. Therefore, in order to carry out ideal vacuum measurement, we must fully understand the above-mentioned problems, so as not to cause greater errors or errors. Vacuum Pump Heat Treatment Guide,Heat Treatment Equipment Liquid Ring Vacuum Pump