China Clutch Belt Kit

Clearance and wearing parts Ensure that the motor bearing clearance is appropriate; appropriately adjust the clearance between the impeller and the volute; regularly check and replace the impeller orifice ring, the pump body orifice ring, the interstage bushing, the diaphragm bushing and other easily wo parts. These reasons will cause vibration. When the changed stiffness is an integral multiple of the angular frequency of the system, resonance occurs. Use sliding bearings that do not need to be lubricated. Impeller Whether the dynamic and static balance is qualified. At this time, the viscosity of the lubricating oil can be appropriately increased to prevent the damage of the hydrodynamic lubricating film. Cavitation vibration is a very important part of pump vibration. Factors of the pump itself The asymmetric pressure field generated when the impeller rotates; the vortex of the suction pool and the inlet pipe;China roller bearings manufacturers the occurrence and disappearance of the vortex inside the impeller, the volute and the guide vane; the vibration caused by the vortex caused by the valve half-opening; the limited number of impeller blades Uneven distribution of outlet pressure; outflow in the impeller; surge; pulsating pressure in the flow channel; cavitation; water flowing in the pump body will have friction and impact on the pump body, such as water flow hitting the front of the diaphragm and guide vane Boiler feedwater pumps that transport high-temperature water are prone to cavitation vibration; pressure pulsation in the pump body is mainly caused by the seal ring of the pump impeller. Finally, in order to prevent the pump's amplitude from being too large, measurement and analysis of vibration conditions can also be used to determine the best working parameters of the pump.  ,China roller bearings manufacturers ...ادامه مطلب

Whether there is noise: Hold the inner sleeve of the bearing with your left hand, and tu the sleeve with your right hand to listen to whether there is any noise. The fonts are very small, but most of the products produced by the factory use steel stamping technology, and they are pressed before heat treatment. If you really can’t distinguish the sound, use a sound meter to check the size and sound quality of the rolling sound of the running imported bearing. Packaging Look at whether the outer packaging is clear: Under normal circumstances, the brand has its own dedicated designers to design the outer packaging, and arrange for production in factories that pass the production conditions, so the packaging is very clear from the lines to the color blocks. Due to the backward production conditions of most counterfeit products and the completely hand-made workshop operation, it is inevitable that impurities such as sand will be mixed in the bearing body during the production process, so noise will be generated when rotating. Even if the bearing is slightly damaged such as peeling, it will emit abnormal and irregular sounds. will be printed on the bearing body. Therefore, although the fonts are small, they are deeply concave and very clear. Due to the rough printing technology, the fonts float on the surface, and some of them can even be easily erased by hand. Able to distinguish. Anti-rust oil Whether there are turbid oil stains on the surface: This should be paid special attention to when purchasing imported bearings. Steel seal Wheel Bearings suppliers Whether the stamping is clear: Brand words, labels, etc. Since the current domestic anti-rust technology is not very popular, it is easy to leave thick oil stains when anti-rust treatment on the bearing body, which is sticky and sticky in the hand, while it is almost invisible on the original imported bearings from abroad. vague. Due to the limitation of production technology, the counterfeit bearings are no,Wheel Bearings suppliers ...ادامه مطلب