Rotary Rings are a type of rotating seal widely used in various rotating equipment, such as rotary joints, rotary couplings, rotary connectors, etc. Its main function is to prevent liquid or gas leakage and maintain the normal operation of the equipment. In different applications, the material, structure, sealing method, size, etc. of Rotary Rings vary to adapt to different working conditions.
The materials of Rotary Rings are mainly divided into two categories: metallic and non-metallic.
Metal materials mainly include stainless steel, steel, copper, aluminum, etc., which have characteristics of high strength, corrosion resistance, wear resistance, and are suitable for rotary seals in harsh environments such as high temperature, high pressure, and high-speed.
Non metallic materials mainly include ceramics, silicon carbide, graphite, etc., which have characteristics such as high hardness, high wear resistance, and low friction coefficient. They are suitable for rotary seals under conditions such as low temperature, low pressure, and high speed.
The Rotary Rings with a unidirectional rotation structure can only rotate in one direction and are suitable for devices with only unidirectional rotation.
The Rotary Rings with a bidirectional rotation structure can rotate in two directions, suitable for devices that require bidirectional rotation.
The Rotary Rings with a rotating stationary structure are composed of a rotating ring and a stationary ring. The rotating ring contacts the stationary ring during rotation to achieve sealing, suitable for equipment that requires a rotating stationary seal.
The sealing methods of Rotary Rings are mainly divided into mechanical sealing and liquid sealing.
Mechanical sealing is achieved through the contact surface between the rotating ring and the stationary ring, which has the characteristics of high reliability, long service life, and simple maintenance. It is suitable for rotary sealing in harsh environments such as high speed, high temperature, and high pressure.
Liquid sealing is achieved by injecting liquid between the rotating ring and the stationary ring, which has the characteristics of good sealing performance, low friction coefficient, and preventing dry friction. It is suitable for rotary sealing under low speed, low temperature, low pressure, and other conditions.
The size of Rotary Rings is mainly determined by the equipment requirements, including inner diameter, outer diameter, thickness, shaft diameter, etc.
Rotary Seals,Rotary Lip Seal,Rotating Shaft Seal,V Seals DG Zhongxingshun Sealing Products Factory , https://www.zxs-seal.comHow to Correctly Install Thrust (Positioning) Bearings
Thrust bearings are commonly used in machinery where axial loads need to be supported. They come in various types, including four-point contact ball bearings, single or double row angular contact ball bearings, two-way thrust tapered roller bearings, two-way thrust cylindrical roller bearings, and even radial bearings with brake roller functions.
When using four-point contact ball bearings or single/double row angular contact ball bearings as thrust bearings, it's important to note that they are not designed for radial loading. Therefore, the inner diameter of the bearing housing should match the outer diameter of the bearing, typically being about 0.5 mm larger than the bearing’s inner diameter, or smaller if the roller diameter is less than 0.5 mm.
For four-point contact ball bearings, it is crucial not to interchange the rings during installation, as this can alter the factory-set axial clearance. Similarly, when dealing with two-way thrust tapered or cylindrical roller bearings, the same type of bearing must not be replaced, as this could also affect the axial clearance.
It is essential to press the inner ring of the thrust bearing properly and lock it axially to prevent any relative movement on the journal, which could lead to wear or overheating at the contact surface.
In the case of brake roller bearings, axial positioning is achieved through two bearing housings, and the axial clearance must be carefully adjusted. When installing the bearing housing, ensure that both the inner and outer rings of the bearing are tightly seated against the corresponding parts of the main bearing. When fixing the frame between the two bearing housings, make sure to eliminate any axial play during the installation process.
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The structure of Rotary Rings is mainly divided into three types: unidirectional rotation, bidirectional rotation, and rotational stationary.
1. Unidirectional rotating structure
Source: Bearing Network | Time: December 28, 2012