The structural principle of the ball honing device is shown in the figure. It is mainly composed of rear axle, middle axle, joint bearing, ball head axle, spring, honing head, frame assembly, etc. The honing head is made of metal in the shape of a bowl. The inner cone of the metal bowl can be inlaid with resin as many as possible according to the specific situation. The particle size and hardness of oilstone strips can be selected according to different ball materials and surface roughness. The surface of the bonded oilstone strip shall be corrected on an ordinary lathe.

Band of non-metallic compensator and its device in circulating fluidized bed boiler
The belt of non-metallic compensator is mainly processed with glass fiber cloth and glass fiber coated rubber cloth or fluoroplastic cloth as the main materials. The belt surface of flexible fabric compensator (non-metallic compensator) is mainly used to receive the pressure of flue gas system and chemical corrosion from flue gas or outside. The belt surface must be soft to absorb displacement from all directions. The outer layer is usually coated with glass fiber cloth for silicone rubber with good weather resistance, and can also be coated with fluororubber, PVC and EPDM. It can decide whether to make another insulation layer according to the temperature of the system.
Compensator is also known as contraction joint in custom. Expansion joint is a kind of compensation installation used to apply the effective expansion deformation of the elastic element of the compensator to absorb the size change of pipeline, conduit or container caused by thermal expansion, cold contraction and other reasons. It belongs to a compensation element. It can absorb axial, transverse, and angular displacement, and is used to absorb vibration and reduce noise when heating displacement and mechanical displacement of pipes, equipment and systems.
The non-metallic compensator is an important part of the circulating fluidized bed boiler. The quality of its device directly affects the sealing of the circulating fluidized bed boiler, and then affects the safe and stable operation of the boiler. Therefore, it is very important to study the non-metallic contraction joint device.
1. Structure and function of non-metallic contraction joint: non-metallic contraction joint, also known as non-metallic compensator, is mainly used to absorb the relative displacement of two components with relative displacement and seal the connection channel between two components with relative displacement.
The non-metallic compensator is composed of non-metallic skin, thermal insulation parts, metal flanges, rib plates, bolts and stainless steel mesh, ceramic fiber rope or pillow shaped sealing materials, etc. The skin is made of heat resistant rubber and glass cloth. The internal structures of non-metallic contraction joints at different parts are different. For example, there is a layer of polytetrafluoroethylene insulation film on the inner side of the skin. The insulation quilt is composed of aluminum silicate refractory fiber felt or rock wool wrapped with ceramic fiber cloth at the insulation part, and the insulation quilt is composed of aluminum silicate refractory fiber felt wrapped with glass ceramic fiber cloth at the insulation part. The three-dimensional contraction direction of non-metallic contraction joints varies with the working position of non-metallic contraction joints. The design fatigue life of non-metallic contraction joints is generally 3000 times. The service life of the advanced non-metallic contraction joint is closely related to the seal design structure selected on the flue gas side of the furnace in addition to the selected data, which has been proved on the operating boiler.
2. Inspection before operation of non-metallic compensator: after the completion of the boiler device and before the commissioning of individual parts, a comprehensive inspection of non-metallic contraction joints should be stopped, mainly to check whether the temporary support and fixing parts can be removed, otherwise the normal displacement of non-metallic contraction joints will be affected.
Check whether the pillow seal data and skin inside the non-metallic compensator furnace are intact, to prevent high-temperature flue gas from flowing from inside to outside and burning non-metallic contraction joints. Check whether the non-metallic sealing gasket and bolt installed on the manhole door above the non-metallic contraction joint can be tightened and sealed tightly, so as to avoid the leakage of high-temperature materials from the sealing surface of each hole door to the outer skin of the non-metallic contraction joint and damage the outer skin of the non-metallic contraction joint. When there is no problem in the inspection, it can cooperate with the boiler host to stop the divisional test run.