Construction of rolling bearings

Rolling bearings are developed based on the bearing, its working principle is based on rolling friction instead of sliding friction, generally by two rings, a set of rolling elements and cage consisting of a highly generic, standardized, serialized high degree of machine parts. A variety of machinery have different working conditions, on the load bearing capacity, structure and performance, etc. have put forward different requirements. To this end, bearing the need for a wide range of structures. However, the basic structure is the inner ring, outer ring, rolling elements and cage components - often referred to as the four pieces. For sealed bearings, together with lubricants and seals (or dust cover) - also known as the six pieces. Type the name of a variety of bearing rolling elements are mostly based on the name of the corresponding named.
 
Various parts in the bearing role are: For radial bearings, inner ring is usually a tight fit with the shaft and running along with the shaft, usually bearing outer ring or mechanical transition fit into the shell hole, play supporting role. However, in some situations, there are outer operation, the inner fixed play supporting role or inner and outer rings are also functioning. For thrust bearings, and shaft tight and together with the movement of said shaft washer, and bearing or mechanical shell holes into the transition and play supporting role with the said seat. Rolling body (ball, roller or needle) with the bearing cage is usually arranged evenly between the two rings as a rolling motion, its shape, size and number of direct impact on the load bearing capacity and performance. In addition to be able to roll cage separated evenly outside the body, but also from the guide rollers bearing internal rotation and improve the lubricity and so on.

Comparative advantages and disadvantages of rolling bearings and plain bearings
Compared with sliding bearings, rolling bearings and sliding bearings compared to the advantages, disadvantages of a rolling bearing, the general conditions, the efficiency and fluid dynamic bearings lubricated bearings are equivalent, but higher than the number of mixed-lubricated bearings;
1, less able to withstand impact loading;
2, the radial clearance is relatively small, angular contact bearings can be used to preload cardiac preload can be used to eliminate clearance, operation and high precision; 2, high-speed heavy load bearing lower life; 3, for the same size shaft, Rolling bearing smaller than the width, the axial machine can compact; can simplify the structure of bearing supports; 3, vibration and noise is relatively large; 4, most of the rolling bearing can be subject to both radial and axial load, so the bearing combination of simple structure; 4, the radial size than the sliding bearing; 5, the rolling high transmission efficiency, less heat, less lubricant consumption, easy to seal, easy to maintain; 6, no useful in non-ferrous metals; 7, the high degree of standardization, mass production, low cost; suitable for mass production and supply, use and maintenance is very convenient.
Cage Cage
W: Steel Crown Type J: Plate wave RJ: plate type with stainless steel rivets forming a stamping, press the wheel design, in the case of low-speed rotation and low torque of the good available to play. Ball pocket part of the design according to the shape of balls, side by the cover side and claws of two parts. Spin the ball in the general direction of friction torque is small. Larger bearings in high load operation, the waveform of the two parts of the rivets, to keep the intensity of vibration and acceleration, the ball-oriented smaller friction torque. TW: Nylon Crown Type V: full-ball type rotary molded nylon retainer little change in torque is high temperature of the ball orientation. Have joined the 66 nylon and glass fibers of high strength materials. Temperature (-30 ~ +120 ℃). Not maintain, because the inside and outside round opened a rectangular slot of the axial not small. Loaded design allows the maximum number of balls for heavy-duty low-speed operation.
Shield ring
 ZZ: stamping steel plate dust cover ZZS: ring-type steel dust cover
TTS: ring-type Teflon ring to the metal stamping on the steel reinforcement in the outer structure. Less oil leakage, external intrusion rarely refuse. The stamping of metal plates fixed to the outer ring with a spring on the structure. Minimal intrusion of garbage outside. Mainly used in small, thin type bearings. Rotation, sound, temperature rise less. The addition of glass fibers with a Teflon ring fixed to the outer ring on the structure. Minimal intrusion of garbage outside. Mainly used in small, thin type bearings. Ring to the corresponding changes in internal pressure. Operating temperature range (-100 ~ +260 ℃).
2RS: contact rubber seals
2RU: Non-contact rubber seals the outer rubber ring embedded in the structure. Light contact with the wheel seals to prevent intrusion of outside trash. The main material is a ring NBR, temperature range (-40 ~ +120 ℃). The outer rubber ring embedded in the structure. No contact with the wheel seals to prevent intrusion of outside trash. Rotation, sound, temperature rise less. The main material is a ring NBR, temperature range (-40 ~ +120 ℃).
Related Keywords: Linear Bushing  Linear Roller Bearing  Linear Ball Bearing