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You are here : Gear oil pump mechanical seal requirements
The working principle of the mechanical seal mechanical seal, also known as seal (Mechanicalseal), is a rotary shaft seals. Reliable mechanical seal, a small amount of leakage, long life, low power consumption. Without frequent maintenance, and can adapt the production process automation and high temperature, low temperature, high pressure, vacuum, high speed and a variety of corrosive media. containing solid particles of media, such as harsh conditions of the hungry seal requirements. mechanical seal is by a pair or more relative to the vertical axis for moving the end face Run fluid pressure and elastic * compensation mechanism (or magnetic) to keep under seal and then merged together with auxiliary shaft seal leakage to the resistance device. Gear pump to the requirements of mechanical seals, mechanical seals and for soft packing seal is as follows:
Advantages:
1) reliable seal, state seal in the long run in a very stable, very small leak, the leak of about 1% of the soft packing seal:
2) long life, in oil, water media, generally up to 1 to 2 years or longer. In the chemical medium in general work more than six months:
3) rub the power consumption is small, the friction power is only the soft packing 10% to 50%
4) shaft or sleeve essentially no friction loss:
5) The maintenance cycle length. End to automatic compensation for wear and tear, under normal circumstances do not need regular maintenance:
6) The resistance to shock, vibration of the axis of rotation and the deflection axis of the sealed chamber is not sensitive to:
7) applies to a wide range of mechanical seals can be used for high-temperature, low temperature, high pressure, vacuum, different rotation frequency, and a variety of corrosive media and sealed with abrasive media.
Disadvantages:
1) more complex, high requirements of processing
2) Installation and replacement of cumbersome, requiring a certain level of technology workers
3) The accident occurred when the chance to handle the more difficult.
The preparation of high prices before sealing:
1) Check the mechanical seal models. Specifications to check whether the requirements of design drawings, so the parts (especially the sealing surface, the auxiliary ring) with or without injury. Deformation. Fractures and so on, if defective, must be replaced or repaired
2) Check the mechanical seal with the size of each part, roughness, degree of compliance with the design requirements of parallel
3) Use a small spring mechanical seal, check the small springs are the same length and rigidity
4) Check the host runout. Swing around the amount and degree of compliance with technical requirements, whether the installation of the sealed chamber size, whether the sealing cover and the vertical axis, the general requirements: shaft runout is less than ¡À 0.5mm: axis swing capacity ( seals at the rotating ring) is not greater than 0.06mm: around the axis of not more than the maximum 0.05mm: flat gasket seal on the cover and not vertical centerline to allow deviation 0.03 ~ 0.05mm
5) should be kept clean, especially the rotating ring and the stationary seal ring seal surface and the supporting surface should be free of impurities. Dust. Not allowed to use dirty not loosen the sealing surface.
6) sealing elements are not allowed to use percussion instruments.
Advantages:
1) reliable seal, state seal in the long run in a very stable, very small leak, the leak of about 1% of the soft packing seal:
2) long life, in oil, water media, generally up to 1 to 2 years or longer. In the chemical medium in general work more than six months:
3) rub the power consumption is small, the friction power is only the soft packing 10% to 50%
4) shaft or sleeve essentially no friction loss:
5) The maintenance cycle length. End to automatic compensation for wear and tear, under normal circumstances do not need regular maintenance:
6) The resistance to shock, vibration of the axis of rotation and the deflection axis of the sealed chamber is not sensitive to:
7) applies to a wide range of mechanical seals can be used for high-temperature, low temperature, high pressure, vacuum, different rotation frequency, and a variety of corrosive media and sealed with abrasive media.
Disadvantages:
1) more complex, high requirements of processing
2) Installation and replacement of cumbersome, requiring a certain level of technology workers
3) The accident occurred when the chance to handle the more difficult.
The preparation of high prices before sealing:
1) Check the mechanical seal models. Specifications to check whether the requirements of design drawings, so the parts (especially the sealing surface, the auxiliary ring) with or without injury. Deformation. Fractures and so on, if defective, must be replaced or repaired
2) Check the mechanical seal with the size of each part, roughness, degree of compliance with the design requirements of parallel
3) Use a small spring mechanical seal, check the small springs are the same length and rigidity
4) Check the host runout. Swing around the amount and degree of compliance with technical requirements, whether the installation of the sealed chamber size, whether the sealing cover and the vertical axis, the general requirements: shaft runout is less than ¡À 0.5mm: axis swing capacity ( seals at the rotating ring) is not greater than 0.06mm: around the axis of not more than the maximum 0.05mm: flat gasket seal on the cover and not vertical centerline to allow deviation 0.03 ~ 0.05mm
5) should be kept clean, especially the rotating ring and the stationary seal ring seal surface and the supporting surface should be free of impurities. Dust. Not allowed to use dirty not loosen the sealing surface.
6) sealing elements are not allowed to use percussion instruments.
