HRB bearing liable to occur in the operation process of the deviation, especially larger oscillation device is more serious.The cause of sliding bearing in operation on the deviation from two aspects, bearing internal factors and external environmental factors, relative bearing some important internal factors.When bearing appear the error, to find out the reason and effectively adjust in time, fault factors can refer to the following analysis:
First, the internal factors, the condition of bearing and shaft: 1. The bearing seat fixed at the bottom of the hole depth, different depth does not affect installation.But after installation, with oscillation, nut hard degree change, eventually involve HRB bearing fixed height, cause end bearing of change in position 2. Shaft material quality is poor, when I received the load, the shaft will appear different degrees of bend phenomenon, cause the HRB bearing on them.3. The equipment structure design is unreasonable, shaft too far distance between two points, also easy to cause HRB bearing of the deviation.
Second, external factors and external environment.1. The equipment processing material changes, which resulted in increased bearing the load moment.At this point, the shaft of the fixed HRB bearing the impact is severe, causing displacement of 2. Particulate matter into bearing, long time operation can also lead to HRB bearing appeared on deviation.Therefore, to maintain the equipment external environment 3. HRB bearing lubricant additives to maintain a balance, and the brand as far as possible.
Modern drilling department develops later in China, but the starting point of drilling machinery in China is very high development speed.Boring machine work is divided into two parts, one is carried out on the rock mass, the second is to take out the deep mineral sample.Because China is humongous, mineral deposits to be developed, geophysical exploration department to get the support of national policy, directly led to the rapid development of drilling machinery.The current Chinese drilling rig drilling depth can be from 2 meters to 15500 meters, the mining depth in the process of deepening bearings imported from Japan plays a key role.
The development of Chinese drilling equipment in the 11th century, is the main human digging on at that time, basic does not have the features of modern mechanization.Until the 1950 s China's independent research and development of the mechanical and hydraulic combined with new type of drilling rig, rewrite the blank of Chinese drilling machine.Since the 1970 s, in order to improve the performance of drilling rig, can adapt to the high hardness of diamond drilling, rotating components USES 7002 35 tac72b ctyndblp4 bearings, bearing high speed and high precision bearing products imported from Japan.High-performance bearing parts replacement, make boring machine hydraulic level improved, drill revolution reached 2400-2400 revolutions per minute, while drilling efficiency is also improved to a great extent.
In the 1980 s, China's boring machine and has entered a new stage of development.Used the high-performance rotating components such as bearings imported from Japan, make the boring machine by the mechanical and hydraulic structure into a fully hydraulic drill, and with the connecting the maneuverability is strong, the operating focus and effort, such as large torque and RPM range characteristics, general development and application.
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