Hydrostatic bearing sleeve

Abstract

The invention discloses a hydrostatic bearing sleeve. The hydrostatic bearing sleeve is provided with a bearing sleeve body, a sleeving hole is formed in the center of the end surface of the bearing sleeve body, an annular protrusion is arranged on the portion, close to the left end, of the periphery of the bearing sleeve, a sealing hole is formed in the left end of the bearing sleeve, a hydrostatic sleeve is arranged on the right end of the bearing sleeve in a sleeving manner, a shaft hole communicating left and right is formed in the center of the end face of the hydrostatic sleeve, a limiting protrusion of an annular structure is arranged on the portion, close to the right end, of the periphery of the hydrostatic sleeve, the limiting protrusion is clamped to the outer side of the rightend of the bearing sleeve body, and oil drainage areas communicating with the shaft hole are arranged on the periphery of the limiting protrusion. According to the hydrostatic bearing sleeve, the rigidity of the bearing sleeve is ensured, the elasticity of the bearing sleeve is also improved to the maximum extent, even if oil temperature changes, an oil film gap between a shaft and the bearing sleeve can not change, so that the defects that an oil film changes easily, a bearing deforms easily, and the running precision of the bearing is not high in the prior art are overcome, the precision ofthe bearing can reach 0.2 mu m, and the rotating speed can reach 10000 revolutions per minute.

Description

technical field [0001] The invention relates to the field of static pressure bearings, in particular to a static pressure bearing sleeve. Background technique [0002] A hydrostatic bearing is a type of sliding bearing that uses a pressure pump to forcibly pump pressure lubricant into the tiny gap between the bearing and the shaft. It is mainly used in the fields that often need to run at low speed and require high load capacity, high rotation precision and high speed, such as various heavy machine tools and high precision machine tools. [0003] At present, most of the bearing sleeves of hydrostatic bearings on the market are made of steel or cast iron. This kind of structure has strong rigidity, but its elasticity is extremely small, and it is greatly affected by oil temperature changes, and its accuracy is easily deformed by temperature changes, resulting in the transmission shaft in the bearing. The thickness of the oil film is easy to change when the sleeve is running,...

AI Technical Summary

Problems solved by technology

[0003] At present, most of the bearing sleeves of hydrostatic bearings on the market are made of steel or cast iron. This kind of structure has strong rigidity, but its elasticity is extremely small, and it is greatly affected by oil temperature changes, and its accuracy is easily deformed by temperature changes. The thickness of the oil film is easy to change when the sleeve is running, so that the running accuracy of the hydrostatic bearing cannot be improved, and the accuracy of the hydrostatic bearing is relatively backward in the world. The high-precision hydrostatic bearings required by China are completely dependent on imports.

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