The production practice is not sensitive to alternating shock loads.
In use, this type of fastening device transmits torque extremely smoothly, with little torque loss and reliable performance. Simultaneous installation and disassembly are very convenient and very insensitive to pollution.
4 Attentions in use After the inside and outside are tightened, contamination cannot occur between the active surfaces.
The use of preservatives and lubricating oils can prevent the slurry from corroding the connection device itself, promote its own lubrication, and prolong its service life. In the maintenance process, the use of elbow 08 watts 3, 500 rare oil, works well.
When a long time is in the overload state of the overload or alternating load, the device will slide and overload protection will occur. Therefore, the shaft and the inner ring of the fastening device will inevitably generate fretting wear, thus affecting the torque transmission. In this case, non-standard examples 7012 can be made by correcting the relevant dimensions of the shaft and the inner ring of the fastening device to ensure the normal operation of the equipment.
There is a great deal of pressure between the inner and outer rings of the device and the acting surfaces of the shaft and the lining, and the air radiating performance between the acting surfaces is very poor. As a result, there is a temperature difference between the lining of the shaft and the rotor. If the shaft and the rotor are of the same material and have the same coefficient of thermal expansion, the thermal expansion of the rotor will be greater than the thermal expansion of the shaft, and the pressure between the fastening device and the acting surface of the shaft rotor will be reduced, ie, the value of the friction coefficient transmitted will be reduced. This reduces the torque delivered by the device. In the company's segment removal machine, because the medium's operating temperature is high, it is 8590.0, so the temperature effect does exist. In the future design, this factor should be taken into consideration, and the axis material should be adjusted.
In short, the ruler still 7012 fastening device has been used for more than one year in the segment removal machine, the overall operation effect is good. In the actual operation process, it embodies the characteristics of smooth running torque, reliable structure and easy maintenance, and is worthy of promotion and promotion. Ppj debt editor Sun Xiaoping, production practice paper machine vacuum system festival Sun Shouhong Mudanjiang Hengfeng Paper Co., Ltd., Heilongjiang Mudanjiang, 157013 With the continuous improvement of people's awareness of energy conservation, papermaking process of energy conservation becomes more and more important. Mudanjiang Hengfeng Paper Co., Ltd. improved the paper machine's water consumption by improving the vacuum system of the 10 paper machine. Now introduce the improvement situation.
1 Process flow before improvement The water ring vacuum pump water used in the process of the system before transformation is from the low pressure water system of the company's branch.
2 Improved process flow After the transformation, the water ring vacuum pump water in the system process flow comes from the vacuum water seal pool 2. The vacuum water seal pool passes through the liquid level control system, and the low pressure water system is used to supplement the control of the water level of the vacuum water seal pool to ensure the vacuum pump. The normal operation. 2 shutoff valves are used for process changeover during maintenance. , Low-pressure water system often shut-off valve production and operation practice, the system has improved energy-saving effect is very significant, can save water 150,000 1. Your editor Zhao, Yu Received 200201 revised draft
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