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Motor Bearing
Published in Wei Tong, Mechanical Design and Manufacturing of Electric Motors, 2022
There are two major types of rolling bearings, distinguished mainly by the rolling-element shape: ball bearings and roller bearings. According to the configuration of the bearing rings, ball bearings are further classified as deep-groove ball bearings and angular contact ball bearings. On the other hand, according to the shape of the rollers, roller bearings are classified as cylindrical, spherical, tapered, and needle roller bearings. To distinguish bearings from their functions, the bearing can be divided into radial bearings, which withstand primarily radial loads and axial loads to a certain extent, and thrust bearings, which withstand only axial loads.
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Published in Heinz P. Bloch, Allan R. Budris, Pump User’s Handbook, 2021
Heinz P. Bloch, Allan R. Budris
Figure 7-8 illustrates the different rolling element bearings found in centrifugal pumps. The three most frequently used ball bearing types are the single row deep groove ball bearing, the double row angular contact ball bearing and the universally matchable single row angular contact ball bearing.
Bearings and Lubrication
Published in Ansel C. Ugural, Youngjin Chung, Errol A. Ugural, Mechanical Engineering Design, 2020
Ansel C. Ugural, Youngjin Chung, Errol A. Ugural
A ball bearing is employed in almost every type of machine or mechanism with rotating parts. Figure 10.21 illustrates the various parts, surfaces, and edges of a ball bearing. Observe that the basic bearing consists of an inner ring, an outer ring, the balls, and the separator (also known as the cage or retainer). To increase the contact area and hence permit larger loads to be carried, the balls run in curvilinear grooves in the rings called raceways. The radius of the raceway is very little larger than the radius of the ball.
Radial load distribution by balls in a ball bearing with variable clearance
Published in Mechanics Based Design of Structures and Machines, 2023
Ravi Sinha, Vineet Sahoo, Manikant Paswan
Nowadays, a ball bearing is extensively used in all kinds of rotational machines. Because of its simple design, low cost, high precision, and little or no maintenance, ball/roller bearing has truly become a valuable asset in the rotating equipment industry. A ball bearing consists of coaxial inner and outer rings with grooves which face each other, set of balls situated in the grooves and distributed along the circumference of these rings and ball separator as shown in Fig. 1. Being a part of the rotational machine components, ball bearings usually support static and dynamic loads from prime movers/machine elements. Depending on the nature of load from prime movers, various types of the ball in ball bearing are used, and the total load is firmly distributed on the balls. The load distribution by the balls in a ball bearing influences the functional ability and load-carrying capacity of bearings in operation.
Robust design of ball bearings for an improved performance using genetic algorithm
Published in International Journal for Computational Methods in Engineering Science and Mechanics, 2021
Shashikant Kumar Verma, Rajiv Tiwari
Rolling bearings are the bearings used to carry or transmit heavy and fluctuating loads. These are used for the radial and axial loads and a combination of both. A rolling bearing’s geometry consists of rolling elements such as balls or rollers placed in between the two rings (inner ring and outer ring). A cage is also mounted between the rings to guide the rolling elements and to maintain a proper annular space between them. To carry load and permit constrained motion, the rolling contact between the rolling elements and raceways are utilized. Due to its low friction characteristics between rolling elements and raceways, these are also termed as anti-friction bearings. Based on the geometry of rolling elements, these are of generally two types, namely the ball and roller bearings. Deep Groove Ball Bearings (DGBBs), angular contact ball bearings and thrust ball bearings come under ball bearings category. Among them, DGBBs are widely used in operations because of its simple geometry, suitable for very high speeds and robustness in operations, and it results in the requirement of less maintenance. However, they have less load carrying capacity compared to roller bearings because of the area of contact (i.e., the point contact for no load condition) between the balls and races are very small, causes the development of very high magnitude of stresses. DGBBs are used in many applications, like in the turbomachinery, agriculture machinery, internal combustion engines, household electrical appliances, instruments, and meters. Therefore, it is very important for DGBBs to have a long fatigue life for an excellent performance, which motivates the designers to use different methods that optimizes the bearing’s performance [1, 2].
An analytical method of axial load distribution of deep groove variable clearance radial ball bearings
Published in Mechanics Based Design of Structures and Machines, 2022
Ravi Sinha, Vineet Sahoo, Manikant Paswan, Bikash Routh
Bearings are one of the widely acknowledged components in the field of rotating machinery systems and industrial applications. One of the frequently used bearings is ball bearing because of its simple design and high precision. The performance parameters of a ball bearing such as load distribution and stiffness characteristics have great influence on the accomplishment of the machinery systems (Chen and Chen 2005; Abu-Zeid and Abdel-Rahman 2013; Li et al. 2017; Cheng et al. 2019). Further, under dynamic state, the precise calculation of load shared by balls in a ball bearing has been well received to evaluate the critical speeds of rotating machinery systems Ertas and Vance (2004).