Slipper mill lubrication system was provided

2021 - slipper mill lubrication system technical instance 01 - 03 Yao Tong stability Guo Bo ( Shanxi vocational college; Wulanchabu China united cement co. , LTD. ) With the rapid development of cement industry, cement grinding enlarged equipment has been set. In recent years, the slipper become a new expansion of many large and medium-sized cement enterprises choose grinding equipment. But found in using the different grinding degree such as winter start difficulties, summer high temperature, seriously affect the stability and economic operation of the mill. 1 technical reformation background and main reason wulanchabu China united cement co. , LTD. ( Hereinafter referred to as 'my company') Form a complete set of cement grinding equipment & phi; 4. 2 m× A 10 m slipper grinding machines, the specific technical parameters are shown in table 1. Since put into operation, the equipment has been plagued by lubrication system operation instability, frequent equipment start-stop, seriously affect the normal operation of the mill system and process control of power consumption. The main problem is: ( 1) Winter mill system start is difficult, high pressure oil pump damage frequently; （ 2) Slipper frequent bearing bushing temperature rise, mill jump stop protection. To thoroughly solve the technical problem, the company organize technical personnel to the slipper mill lubrication system are analyzed, the structure of the defects and implementation of the technical transformation. 2 defect analysis and transformation ideas ( 1) My company is in alpine high altitude areas, winter temperatures average minus 20. 6 ℃, the lowest temperature is about 31 ℃ below zero. In winter arrival due to the low environmental temperature, high pressure oil pipe line is longer than the other, fast heat dissipation, leading to low temperature state of lubricating oil temperature is too low, viscosity increases, the fluid resistance increases, causing high pressure plunger pump load increase, resulting in damage of plunger pump plunger, at the same time due to the lubricating oil viscosity increased, resulting in a decrease of lubricating oil flow, grinding and slipper, poor lubrication bearing start torque increase, resulting in the start difficult. Specific high pressure oil circuit schematic diagram as shown in figure 1. （ 2) My company's double grinding slipper, slipper cover outside the baize sealing rubber lip seal + industry, because of the bad sealing, slipper enclosure into the dust, the pollution of the lubricating oil, lubricating oil film difficult to form, resulting in hollow shaft and main shaft tile poor lubrication, high temperature. Protect jump stop at temperature of 70 ℃. Tile structure and oil sac signal as shown in figure 2, 3. 3 technical improvement measures, 1) Temperature control heating cable laying on the road at high pressure oil pipe, and wrapped outside the 50 mm thick rock wool insulating layer, it can effectively guarantee the high pressure oil pipe temperature constant temperature control in 15 & plusmn; 5 ℃ and reduce pipeline heat loss. Specific high pressure oil pipe heating system as shown in figure 4. （ 2) Change the sealing structure of original slipper bearing cover. Slipper is passed by shard cover flange bearing cover shell occlusal, lower fixed on the slipper bearing plate, between the shell and slip ring seal structure is rubber + felt seal, before the modification structure as shown in figure 5. Sealing after the modification structure adopts the more advanced combined sealing structure, concrete structure as shown in figure 6. Considering the high linear velocity slip ring diameter, the first set in the inside of the cover sealing ring an oil slinger, oil slinger circumferential is divided into three sections, as shown in figure 7. When installation through the locking bolt, the inner diameter and the slip ring outer ring should keep a good joint, to prevent the loose, should be with the slip ring outer ring spot welding. In the two side sliding shoe cover shell set inside the tank, in order to prevent the shell on the oil into the oil slinger and between the rubber seal. Set up outside of the shell rubber seal, seal face pressure on deformation of rubber itself after installation, internal through the block in the middle of the oil hole into the dry oil lubricating grease filling. 4 the actual use effect after the technical transformation, and the grease lubrication system to configure, the modified slipper mill lubrication system work is normal, the specific circumstances of grease are shown in table 2. Five epilogue of this innovation point lies in the change of the sealing structure of original slipper mill bearing cage, add heating device of high pressure oil pipe, reconfigure the grease, thus ensuring the normal work of the slipper mill lubrication system. Technical renovation measures are simple and effective, low cost, it is worth reference and use. Source: 'cement technology'