Sliding bearing https://www.marginalbearings.com/products You can pay attention to this company.
Marginal Bearing is a professional corporation for the holistic solution of technologies on self- lubricating and pre-lubricated plain bearings since 2010. Marginal bearing locates at Jiashan, Zhejiang, where is the base of manufacturing self- lubricating and pre-lubricated plain bearings in China.
A long term cooperation with colleges and scientific research institutions our technical and sales teams are endowed with rich experiences and full vigours, we highlight the new materials R & D, designation and high-end market demand as our outstanding characteristics, Marginal bearing gradually grows to become a shining star in this industry.
The ISO9001 quality system compliance as well as with the accurate manufacturing and testing facilities guarantee us to deliver high quality level products to the OEMs market worldwide. Quick reaction and customised products are our advantages, customers' satisfaction is the unshirkable responsibility mission of Marginal Bearing.
Products:Bearings, bushes, tilting pads, flanges, thrust washers,labyrinths etc friction parts
We manufacture sliding bearings for any rotating machine.
• Compressors
• Turbines
• Pumps
• Gearboxes
• Rolling Mills
• Grinders
• Engines
• Alternators
We manufacture sliding bearings for following sector of activity.
• Petrochemicals
• Power generation
• Chemistry
• Shipyards
• Railways
• Iron & Steel production companies
• Cement works
Cause The oil film pressure of the sliding bearing is generated by the rotation of the rotor itself, and the oil supply system is simple. Well-designed plain bearings have a long service life and are widely used by many rotating machinery. After the high-power two-pole high-voltage motor adopts the sliding bearing, many motor vibration values exceed the user's requirements. After vibration analysis, the main components of the motor vibration are composed of 25H z or 50Hz vibration, and occasionally 100H z will be the main Ingredients. In response to this situation, we have taken some measures, but the results are not satisfactory, so it is necessary to find out the cause of the vibration and take more targeted countermeasures. 2 The test case is 500-2P 1450k W 6kV: the motor has no obvious electromagnetic vibration when it is running at no load. The maximum vibration value is 7.6mm s-1, and the vibration spectrum is 9.1mm s-1/25Hz, 0.6mm s. -1/50 Hz, 3.1 mm s-1 /75 Hz. In order to reduce the influence and analysis of the electromagnetic torque on the test results, the "open/stop" function of the V b7 vibration analyzer is used to automatically acquire a vibration at intervals of 60 r/min-80 r/min during the speed reduction process after the motor is powered off. Data, simultaneous spectrum analysis, the data collected in the two speed reduction process are shown in Table 1 and Table 2. According to Table 1 and Table 2, the data of the vibration (ie, power frequency vibration and half speed whirl) of the total vibration, the speed of the speed and the half of the speed of the speed during the two speed reduction processes are taken respectively, and the graphs 1 and 2 are respectively made. The test found that the two-pole motor has a large vibration at the same frequency as the motor speed during the acceleration and deceleration. The vibration at half the speed is sometimes not very stable. It has been more than 8m m/s and low frequency noise can be heard. At this time, the vibration at the same frequency as the rotational speed is also unstable, and the phenomenon that the time is large is small, and the vibration value of the motor is also unstable. In addition, the motor has a stable frequency vibration, which does not change with the change of the rotational speed (as can be seen from Table 1 and Table 2).
