[Mechanical Equipment Technology Edition] Daily Question 201803021: Screw Refrigeration Compressors – Basic Structure and Characteristics (3)
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This post was last edited by YORK Industrial Refrigeration on 2018-3-23 at 09:48. This year’s 【Daily Question】 is divided into three categories: screw refrigeration compressors, refrigeration systems, and oil circuits, aiming to provide a comprehensive understanding of refrigeration technology. (If you encounter something you don’t know or can’t answer, please actively look up information; by doing so, your skills will improve!) ) All participants in the comments on this post will receive 1-3 wealth points; those who give complete answers will get 10-15 points, with the validity period being two days. ============================== Basic structure and characteristics of screw refrigeration compressors (3): The bearings used in refrigeration screw compressors are mainly divided into angular contact bearings and sliding bearings. What are the forces acting on these bearings? Answer: Angular contact bearings mainly bear the axial forces resulting from the forward and backward movement of the rotor during suction and exhaust, as well as the radial forces acting on the rotor. Sliding bearings are the main types of bearings that bear these forces (radial forces). https://attach01.hcbbs.com/forum/201803/19/092745msctpzc82t8wbes0.gif ============================== Premium promotion: Video tutorials on the maintenance and adjustment of York compressors for industrial equipment https://bbs.hcbbs.com/forum.php?mod=viewthread&tid=1806833 Procedures for maintaining York screw compressors for industrial equipment https://bbs.hcbbs.com/forum.php?mod=viewthread&tid=1806833 Upgrading of York Quontum control centers for industrial equipment https://bbs.hcbbs.com/thread-1804837-1-1.html Major repairs of GEA Grasox screw compressors for industrial equipment https://bbs.hcbbs.com/thread-1800467-1-1.html Disassembly and maintenance of British HOWDEN screw compressors for industrial equipment https://bbs.hcbbs.com/thread-1832529-1-1.html Disassembly and maintenance of Japanese MYCOM screw compressors for industrial equipment https://bbs.hcbbs.com/forum.php?mod=viewthread&tid=
Feeling stuck on today's questions? ? ? ? ? ? ? Don’t know how to answer? Do angular bearings have a high load-bearing capacity? Sliding bearings? I don’t think I’ve seen them before? I have only seen rolling bearings. The bearing capacity of sliding is relatively low, as it has to support the weight of the object that needs to be moved.
Angular contact bearings used in pairs can withstand large axial forces as well as radial forces, while sliding bearings here can only withstand radial forces.
Angular contact ball bearings can withstand both radial loads and axial loads. Radial (centripetal) sliding bearings and thrust (axial) sliding bearings
Angular contact bearings: withstand axial and radial forces. Sliding bearings: withstand radial forces
Angular contact bearings can withstand both radial and axial loads, therefore the bearing assembly has a simple structure； However, it has a poor capacity to withstand impact loads, and its bearing life is low under high-speed heavy-load conditions ；
Angular contact is thrust, while the others are radial. Do you mean the bearing bush when you talk about a sliding bearing, or the inner ring of the bearing where the rollers can slide?
The sliding bearings of screw compressors mainly bear radial loads, while angular contact ball bearings mainly bear axial loads.
Angular contact bearings used in pairs can withstand large axial and radial forces, while sliding bearings can only withstand radial forces
Angular contact ball bearings can withstand both radial loads and axial loads. Radial (centripetal) sliding bearings and thrust (axial) sliding bearings