Vacuum pumps aredeveloping rapidly, and the frequency of use has gradually increased in recent years, especially Roots vacuum pumps have been tested in long-term operation in petroleum, chemical, plastics, pesticides, turbine rotor dynamic balancing, aerospace space simulation and other installations, and they are also widely used in petroleum, chemical, metallurgy, textile and other industries. Vacuum pump accessories are used as vacuum pump silencers for vacuum pump noise management.
However, there will inevitably be concerns, such as the use of Roots vacuum due to a series of failures caused by other reasons. For example, what is the reason for the high temperature of the Roots vacuum pump and how to solve it?
Roots vacuum pump in the process of use, its temperature will continue to rise, may exceed the temperature barrier. There are many reasons for this phenomenon. Here, we need to analyze the equipment disassembly step by step. The following is a small introduction to the method of equipment disassembly and the reasons for the high temperature of the motor:
First, the reasons for the high temperature of the Roots vacuum pump
(1) The motor power is large, the working current is large, and the heat generation is high.
(2) Low fan speed, small wind pressure and air volume.
(3) The number of fan blades is small, the outbreak of small air volume.
(4)The motor is attached with dust and oil, which reduces the heat dissipation ability.
(5) The bus voltage of the vacuum pump motor is 380V V. Due to the cable voltage drop and uneven load distribution, the applied voltage of the motor is actually only 365V, and the low voltage of the vacuum pump leads to a large operating current.
These are the reasons why the temperature of the Roots vacuum pump motor is too high. In order to avoid the phenomenon of high temperature of Roots vacuum pump, you can regularly remove the dust on the motor and keep the motor radiator clean to increase its heat dissipation capacity. The original electric fan cover is lengthened by 40 centimeters, and an axial fan with the same diameter as the electric fan cover is installed inside.
Second, disassembly steps
1、Before disassembling the Roots vacuum pump, measure and record the part clearance of the rotor, try not to strike with a heavy hammer, and the removed parts should be properly stored without collision.
2、Stop recording in detail the replacement reason and application status of the parts to be replaced.
3、Clean all parts and grind burrs before disassembling the imported vacuum pump again.
4、Apply inorganic silicone rubber coating treatment to the static sealing surface without gasket lining or sealing ring, and then adjust the idling space of each part of the rotor according to the idling space table.
In addition, after disassembling the imported vacuum pump, it should be completely installed according to the requirements, but should stop leakage detection. After reinstallation, the trial operation and function test should be stopped in time. Only under normal conditions can the equipment be used.
When there is a problem with the Roots vacuum pump, it is necessary to stop the machine immediately and cut off the power supply before disassembling. This is to protect personal and equipment safety. The disassembly should be in accordance with the correct method and the use of reasonable temperature control, in order to reduce the risk of excessive temperature.
