1. Key points for shutdown operations
When a vacuum pump needs to be stopped, the correct operating sequence is crucial. First, close the gate valve slowly and steadily. This step is like building a dam for a rushing river to prevent the continued flow of gas. Next, pay close attention to the changes in the value of the pressure gauge, and stop the motor decisively after it stabilizes and returns to zero. If the operating sequence is improper, such as stopping the motor first, the pressure in the pump chamber may be instantly unbalanced, causing gas reflux and damage to the internal structure of the vacuum pump. Correct shutdown operations can effectively protect the various components of the vacuum pump and extend its service life.
2. The importance of regular maintenance
Generally speaking, a vacuum pump needs to be fully overhauled after 2,000 cumulative hours of work. This is just like the human body needs regular physical examinations to detect potential problems in a timely manner and solve them. During the maintenance process, it is necessary to focus on checking the aging degree of rubber seals. As a key component of the vacuum pump to prevent gas leakage, rubber seals will gradually age, harden, and crack as the use time increases. Once the rubber seal fails, the vacuum degree of the vacuum pump will be seriously affected, and it may even fail to work properly. At the same time, it is also necessary to carefully check whether the exhaust valve plate is cracked, and clean the dirt deposited on the valve plate and the exhaust valve seat. The accumulation of these dirt will hinder the smooth exhaust and reduce the working efficiency of the vacuum pump. Through regular maintenance, it is possible to replace the aged rubber seals in time, repair or replace the damaged exhaust valve plate, clean the dirt, and ensure that the vacuum pump is always in good operating condition.
3. Pipeline and flexibility inspection
During daily use, it is necessary to regularly check whether the vacuum pump pipeline and joints are loose. Loose pipelines may cause gas leakage, affecting the vacuum degree and working efficiency of the vacuum pump. You can observe the connection parts of the pipeline with the naked eye to see if there are gaps or displacements, or you can gently shake the pipeline by hand to check whether it is firm. In addition, turning the vacuum pump by hand to feel whether it rotates flexibly is also a simple and effective inspection method. If you feel a jam or large resistance during rotation, it may mean that the internal parts of the vacuum pump have problems such as wear, deformation or foreign body blockage, which need to be checked and handled in time. Keeping the pipeline tightly connected and the vacuum pump flexibly rotated is the basis for ensuring its normal operation.
4. Reasonable control of working parameters
Try to control the flow and head of the vacuum pump within the range indicated on the sign, which is the key to ensuring the efficient operation of the vacuum pump. Each vacuum pump has its optimal designed working parameter range. When the actual working parameters deviate from this range, the efficiency of the vacuum pump will drop significantly, and it may also increase energy consumption and equipment wear. For example, when the flow rate is too large, the vacuum pump needs to consume more energy to transport gas, which will not only cause the motor to overload, but also may cause excessive pressure on the components inside the pump body, accelerating wear. When the flow rate is too small, the vacuum pump may experience cavitation, which will also damage the equipment. By reasonably controlling the flow rate and head, the vacuum pump can operate in an efficient and energy-saving state, reduce operating costs, and extend the service life of the equipment.
5. Monitoring of bearing temperature
During the operation of the vacuum pump, the bearing temperature is an important indicator that needs to be closely monitored. Generally speaking, the bearing temperature cannot exceed 35℃ above the ambient temperature, and the maximum temperature cannot exceed 80℃. As a key component supporting the rotation of the rotor, the bearing will generate a lot of heat during high-speed operation. If the bearing temperature is too high, the lubricating grease will become thinner and lose, thereby aggravating the wear of the bearing and even causing serious faults such as bearing burning. In order to monitor the bearing temperature in real time, a temperature sensor can be installed on the vacuum pump to transmit the temperature data to the control system for real-time display and alarm. Once the bearing temperature is found to be abnormally high, the machine should be stopped immediately for inspection to find out the cause, such as whether it is insufficient lubrication, bearing damage, motor overload, etc., and take appropriate measures to solve it in time to ensure the safe operation of the vacuum pump.
6. Inspection and replacement of sleeve wear
As an important component to protect the pump shaft, the sleeve will rub against other components during the operation of the vacuum pump, and wear will inevitably occur. It is very important to check the wear of the sleeve regularly, which can generally be judged by measuring the thickness of the sleeve or observing the wear marks on its surface. When the sleeve is worn out, it should be replaced in time. If the sleeve is not replaced in time, it will not only aggravate the wear of the pump shaft, but also increase the gap between the pump shaft and other components, affecting the performance and stability of the vacuum pump. Selecting a sleeve with reliable quality for replacement and strictly following the operating procedures during the replacement process can ensure that the sleeve plays its due protective role and guarantee the normal operation of the vacuum pump.