Bearing seal is introduced, Illustrated) , it is worth collecting

Bearing seal to prevent bearing parts within the lubricant leakage, and to prevent external dust, water, foreign bodies, such as harmful objects into bearing internal, can make the bearing under the condition of required, safe and durable. The floorboard of the device for this purpose, namely the bearing sealing device. Sealing device for maintaining operation performance, and durability aspects of bearing, have a lot of tasks. Grease lubrication of the seal comes easier, oil seal is more difficult. Sealing device can also be agents in the form of sealed bearing. Explain most directly in bearing type is our query, often see behind the bearing type with letters: ZZ, 2 rz, 2 rs, 2 RSW, 2 RSH. And these letters is to represent different bearing seal form, there is a way of sealing is bearing composite seal. Below the bearing network according to the understanding of the bearing seal knowledge, to share these with sealed bearings with where the advantages and disadvantages of and related seal. A, ZZ - Dust cover sealing using the environment: motor, etc. Advantages: low cost, low starting torque, which can realize high temperature and low temperature conditions. Weakness: the sealing gap is bigger ( General 0. More than 4 mm) And low dust sex. Second, in fact - Rubber cover seal used non-contact environment: motor, etc. WTOO - 6001 structure -- — After 2 rz bearing feed along the worst advantages: 1, 2, a sealing lip all do not contact with bearing, low starting torque, small calorific value; 2, the manufacturing precision of the labyrinth seals and sealing groove requirements is low, the cost is relatively low; 3, as a result of labyrinth seal structure, good dust effect. Weakness: MAX0 seal clearance. 2 mm, the water vapor occasion more dust and mud and without resistance RS - Light touch rubber cover sealing using the environment: motor, water pump, such as automotive tension rose - — NZSB - 6001 existing structure NZSB structure of three lip RS, lubricating oil into, after bearing the basic no abnormal wear and tear. Advantages: 1, the main lip contact with labyrinth seal groove on the axial, start torque and heat trace increases; 2, because the main lip axial sealing contact, two deputy lip radial clearance seal, therefore has good dustproof effect. Disadvantages: 1, higher requirements on the seal groove and sealing ring shape; 2, does not have waterproof effect. Fourth, RSW - Contact glue cap seal - again - - ( For 608 ocean structure) Using the environment: automotive tight bearings, auto cooling fan, etc. Advantages: 1, three lip seal, optimization design of the main lip Angle, the axial interference, prevent starting torque is too large; 2, extend the first deputy of lip, so as to form small gap sealing, prevent the leakage of lubrication and moisture to enter; 3, second deputy lip joint cooperation, to achieve the joint function of radial sealing and axial sealing, at the same time to extend the sealing ring seal of slime water resistance and the ability to resist friction losses. Disadvantages: 1, higher requirements on the seal groove and sealing ring shape; 2, to soak for a long time running powerless; 3, large start torque, the impact of motor power. Fifth, RSH - High sealing using the environment: on the starting torque of a low, but the site or use the places that have requirements of pollution. Six, RSH - High contact glue cap seal - - - - ( The power supply the wheel structure) Using the environment: auto water pumps, industrial pumps, power, agricultural machinery, etc. Characteristics: 1, used in special need water vapor erosion; 2, inside the sealing lip for improvement of the grease to keep. 3, import materials for rubber can better prevent water vapor into the bearing; 4, in order to reduce torque and improve the sealing performance, the optimization of the structure of the sealing lip; 5, due to the sealing contact surface adopted high precision processing, reduce the friction loss of sealing material, extend the service life of the seal; 6, the special sealing lip design can automatically compensate the wear of seal. Weakness: the friction torque is very large. 7, composite sealing using the environment: automobile, agricultural machinery, etc. Advantages: 1, inside the sealing lip to improve retention of grease; 2, the reinforcement of rubber material can better prevent refrigerant from entering the bearing; 3, in order to reduce torque and improve the sealing, performance, the optimization of the structure of the sealing lip; 4, the third lip strengthened the protection of the sealing; 5, additional stainless steel ring sling water dynamic seal. Weakness: the friction torque is large, cost is very high.