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/*728*90 created on 2018/5/16*/ var cpro_id = "u3440131"; Home>Bearing knowledge>How to correct paper machine bearings online? How to correct paper machine bearings online?
Online correction of paper machine bearings: /*250*250 was created on 2017/12/25*/ var cpro_id = 'u3171089';
The bearing is a wearable part of the paper machine; once the grinding loses effect; it is necessary to stop the replacement; this will give the paper mill a certain economic loss. Therefore, it is important to ensure that the bearing is connected to the work; it is of great significance to the normal operation of the paper machine. The most simple part of the paper machine is the paper machine net part bearing; the press part bearing, the calender, especially the super calender and the soft calender bearing; the reason is that the working condition of these parts of the paper machine is very bad; Large, high temperature, high humidity and high speed operation. At present, the smoothness of the smoothness of the paper machine is generally lacking in abrasion resistance and water resistance; it can't reach the “ambient and smoothâ€; even the smoothing agent can not be completely used by some international famous brands. Satisfied and cope with the harsh working conditions of high speed paper machines.
According to the sensing skills, the development of control skills and the needs of successive production; modern high-speed paper machines have been gradually changed from the time-repair system TBM to the condition-repair system CBM; the smoothing agent used in domestic paper machines is lacking in smooth use; It is inevitable that a paper machine consisting of a bearing failure will be inevitably stopped; and more and more.
Generally; once the paper machine bearing temperature rises abnormally, the sensation increases the overrun condition; it needs to stop replacing the bearing. This paper analyzes a method of online correction of the bearing.
1. In-line correction of paper machine bearings in the case of paper machine bearings using general smoothing agent, the temperature rises abnormally, and the sensation increases the over-expansion demand to stop the replacement of the bearing; the bearing can be corrected online by the higher-function smoothing agent. Write high-performance smoothing agent; replace the original smoothing agent; after a period of operation; also play a certain correction effect; make the bearing temperature and sensation return to normal; enable the paper machine to keep the work until overhaul; then completely remove and replace Smoothing agent without replacing the bearing. Currently; high-performance smoothing agent with correction function has been presented. For example, the purple crown produced by American Purple Crown Co., Ltd. constitutes a smoothing agent. The online correction of the failed paper machine bearing can not only reduce the non-scheduling stop; prevent the formation The huge economy is lost; and it can save a lot of repair costs and bearing equipment costs.
2, high-function smoothing agent to correct the principle of the bearing The most smooth condition of the bearing is the smooth gap. The bearing smoothness is mostly due to the lack of smoothing agent function; the strength of the gap film and the bearing capacity are not high. The low-intensity gap film is high. Under the load, it will break; the metal conflict will form the wear surface of the bearing to make the wear scar; the bearing will show abnormal temperature rise and sensation increase; at this moment; the wear speed will accelerate sharply; the bearing will quickly fail. Replace the high-function smoothing agent because of the strength High gap film; can hinder wear; a smoothing agent with a correction function has a special micro-polishing function; it can micro-polish the appearance of the brushed bearing work; make the working surface bright as a mirror; and reach the intention of correcting the bearing The failed bearing is corrected by the smoothing agent and the operating temperature is lower; the collision factor is smaller.
3 The use of high-performance smoothing agent to successfully correct the bearing case The use of high-performance smoothing agent with micro-polishing function to successfully correct the failure of the bearing in many industries at home and abroad, such as; this article only analyzes a few typical cases.
3.1 American Fraser Paper successfully modified Fraser Paper's No. 6 paper machine No. 1 vacuum press transmission side bearing Originally used a famous brand to form smooth grease; in early November 2000; bearing temperature from the usual 74-79 ° C Rise to 120 °C; and with strong earthquakes; thus; discriminate these bearing lines will be invalid. At this moment, participate in the purple crown UPG2 grease; after 1 h of operation; the temperature dropped to 71 ° C; the sensation also decreased; the targets recovered normally .Fraser Paper concluded that the purple oil prevented the shutdown of the program for about 12 hours; the company prevented the loss from surpassing $36,000.
3. 2 Guangshen Line Blue Arrow locomotive German high-power traction motor damaged FAG bearing successfully revised in April 2003; Guangshen line Blue Arrow locomotive Adtranz traction motor bearing grease attack; attack sensation and wear scar; used Smooth grease is a component of Germany's famous Krupp. The German Motor Factory professor participated in the inspection; advocated replacing the new bearing. The demand for the Guangzhou-Shenzhen line was repaired before May 1, 2003; and the German new bearing has to wait for 4 months. Only in stock. Zhuzhou engineers learned the R&D experience of China High Speed ​​Locomotive China Star; used the international leading purple crown to form smooth oil; monitored the operation after 80 hours; finally, 6 of the 8 bearings reached the new factory target. 2 corrections arrived at the safe operation area; saved the expensive expenses of replacing FAG special new bearings; and enabled the Blue Arrow locomotive to come back in time to retire; the economic loss was reduced by nearly 10 million yuan.
3. 3 200 HP Roots Roots Blower successfully corrected the Gulf of Mexico chemical plant using a famous international brand of smooth oil; Roots blower attack strong earthquake beyond the warning line; replaced with purple crown Synfilm GT 320 smooth oil operation 3 days corrected amplitude Reach the goal after the overhaul.
4 Conclusion In order to improve the operating rate of the paper machine; reduce the stop outside the program; improve the economic efficiency of the paper mill; when the paper machine bearing uses the general smoothing agent to cause smoothness and wear loss; can use the high-performance composition with micro-polishing function Smoothing agent for online correction. Paper mills can prevent the huge economic loss caused by non-scheme stop; save repair costs and spare parts overhead. Online correction of failed paper machine bearings is a good way to improve the economic efficiency of paper mills; Paper mill promotion and application.
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Source: China Bearing Network Time: 2013-11-29