Durable static main shaft

Abstract

The invention discloses a durable static main shaft. The durable static main shaft comprises a main shaft core; transmission rods are fixedly connected to the left and right ends of the main shaft core; a thrust shaft collar is fixedly connected to the external surface of the main shaft core; two first radial oil return grooves are formed in the external surface of the thrust shaft collar; a shaftbushing sleeves the external surface of the main shaft core; one group of first radial oil return cavities is formed in the internal wall of the shaft bushing; the two first radial oil return cavities communicate with two radial oil return grooves; and a main shaft sleeve sleeves the external surface of the shaft bushing. According to the durable static main shaft, the design structure is reasonable; through adoption of a designed heating pipe, high pressure oil entering into a bearing is preheated so that the wear can be reduced, and energy loss can be prevented from being increased due to over-high resistance when the bearing is just started; through adoption of a designed constant pressure valve, oil pressure can be stably supplied to improve the stability of the bearing; and through adoption of a designed filter element, impurities contained in the supplied oil are filtered so that the stability of the bearing is improved and the service life of the bearing is prolonged.

Description

technical field [0001] The invention relates to the technical field of machinery, in particular to a durable static main shaft. Background technique [0002] Machinery manufacturing refers to the industrial sector engaged in the production of various power machinery, lifting and transportation machinery, agricultural machinery, metallurgical and mining machinery, chemical machinery, textile machinery, machine tools, tools, instruments, meters and other mechanical equipment. The economy provides technical equipment, and its development level is one of the main symbols of the country's industrialization level. Among them, hydrostatic bearings play an important role in high-precision CNC lathes. Sliding bearings that realize liquid lubrication, hydrostatic bearings always work under liquid lubrication from start to stop, so there is no wear, long service life, low starting power, and can be applied at extremely low (or even zero) speeds. In addition , this kind of bearing also...

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Problems solved by technology

[0003] At present, the hydrostatic bearings on the market have limited heat dissipation capacity and no good heat dissipation system, which greatly reduces the service life of the bearings. Affected by temperature, the fluidity of hydraulic oil at low temperature is poor. Because the oil inlet pipe is not designed with heating facilities, the bearings The energy consumption increases and the wear is serious at the beginning of work, so we provide a durable static spindle to solve the above problems

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