No tooth traction permanent magnet synchronous machines bearing application technology

No tooth traction permanent magnet synchronous machines 2018 - bearing application technology 09 - 26 1, commonly used no tooth bearing type permanent magnet synchronous traction machine has to save energy, small volume, low speed advantages of stable operation, low noise, no maintenance, is currently the most widely used type of elevator traction machine. No tooth traction permanent magnet synchronous machine by the permanent magnet synchronous motor, traction wheel and brake system. Typical of the traction machine structure as shown in figure 1. No tooth figure 1 permanent magnet synchronous traction machine structure of traction machine commonly used types of the bearing deep groove ball bearing, spherical roller bearings and tapered roller bearings. The following respectively introduce the characteristics of the three kinds of bearing. 1. 1 deep groove ball bearing deep groove ball bearing with quiet operation performance, and low friction, small pressure lubrication and good high speed performance. Traction machine widely used in sealing deep groove ball bearings. Dustproof sealed deep groove ball bearings are on both sides of the belt ( 2Z） And with seals on both sides ( 2RSR） In the design. Sealed deep groove ball bearings with high quality grease, can guarantee the bearing the whole life time free maintenance. Bearing structure as shown in figure 2. Deep groove ball bearings can withstand radial force and axial force of the two directions, thus can be used for locating bearing. Deep groove ball bearings inside and outside the circle of the integral, if used as floating bearing, must set a ring to loose fit. Single row deep groove ball bearings in the wrong compensation ability is limited, will lead to wrong in adverse operation state, the roller bearing inner stress increase, so as to shorten the working life of the bearing. Single row deep groove ball bearings allow Angle in the listed in table 1. 1. 2 self-aligning roller bearing 1. 2. 1 standard spherical roller bearing self-aligning roller bearing with symmetrical two row cylindrical roller, can withstand the high radial force and axial force of the two directions, especially suitable for carrying high applications, is the most used in traction machine bearings. Spherical roller bearing with stamping steel cage and solid brass cage design. The traction machine market application of spherical roller bearings are X-ray Life is designed, with suffix E1, said bearing structure as shown in figure 3. 1. 2. 2 sealed spherical roller bearing seal spherical roller bearings based on standard X-ray Life self-aligning roller bearing development, as shown in figure 4. Sealed spherical roller bearings with standard bearing properties not only, the user can also benefit from more: - Lower overall maintenance costs - Improve the bearing life and reliability Reduce oil consumption Equipment structure more compact - More environmental protection for different bearing series, there are two kinds of sealed spherical roller bearings design: widened design bearing ring, use the prefix WS to identify. This design used in parts 222 and 223 series, such as WS22215 - E1 - 2RSR。 The rest of the 222, 223, 230, 231 and 232 series of sealed spherical roller bearings with F - A name. The standard design of the bearing ring is not widened, no prefix. This design is applied in 240 and 241 series, such as 24024 - E1 - 2VSR。 Sealed spherical roller bearings on both sides of the contact with a sealing ring, inject high quality grease in advance, can through the outer ring of the oil groove and oil hole on the supplement of the grease. The same type of sealed spherical roller bearing the same as the standard design of bearing capacity, self-aligning ability biggest 0. 5° 。 1. 2. 3 low noise spherical roller bearings with low noise spherical roller bearing is targeted at the elevator special products market development, has the same size with the standard bearings and bearing capacity, and lower noise. Low noise spherical roller bearings by two special suffixes are identified: u - T45A, up to 10% lower than the standard bearing noise. ★- - - - - - T45C, up to 40% lower than the standard bearing noise. 1. 3 tapered roller bearings taper roller bearings can withstand high radial force and the axial force of the one-way, usually two tapered roller bearings adopt symmetrical layout matching use, matching has higher bearing capacity and precise when using axial guide. Tapered roller bearing pairs there are two kinds of arrangement, O arrangement ( Figure 5 b) And layout of the X ( Figure 5 c) 。 Tapered roller bearing axial bearing capacity depends on the contact Angle, contact Angle, the greater the bearings can withstand axial load. In order to ensure the bearing in the process of operation does not produce skid, tapered roller bearing at least a minimum radial load under P/Cr> 0. 02. Tapered roller bearing is separable bearing, inside and outside the circle can be installed separately.