Dynamic and static pressure conical bearing with wedged dovetail cavities

Abstract

The invention discloses a dynamic and static pressure conical bearing with wedged dovetail cavities. An oil film is formed between a main bearing and a bearing bush; the inner surface of the bearing bush is an inner conical surface; four oil cavities with wedged dovetail cavity structures are uniformly arranged on the inner conical surface along the circumferential direction; each wedged dovetail cavity comprises a deep cavity zone, a wedged cavity large-end zone and a wedged tip zone; the edge of each oil cavity is an oil sealing side; two oil inlet holes connected with an oil supply groove are formed in each deep cavity zone; the outer surface of the bearing bush is cylindrical; an annular small-end oil supply groove and an annular large-end oil supply groove are formed in the surface of the bearing bush, are throttled by ring clearances and are communicated with the oil inlet hole in the deep cavity zone; an annular main oil supply channel is formed in the middle of the outer surface of the bearing bush; and the main oil supply channel is communicated with the small-end oil supply groove and the large-end oil supply groove in the outer surface of the bearing bush through a branch oil supply channel. The dynamic and static pressure conical bearing disclosed by the invention can simultaneously bear radial and axial loads; meanwhile, self alignment can be realized by the oil cavities; and a high-efficient throttling mode and no blockage are realized. The dynamic and static pressure conical bearing has the characteristics of convenience in clearance adjustment of the oil film, low friction power consumption and compact structure.

Description

technical field [0001] The invention relates to a dynamic and static pressure tapered bearing with a wedge-shaped dovetail cavity. The patent of the invention relates to a wedge-shaped dovetail cavity dynamic and static pressure tapered bearing, which can simultaneously bear radial and axial loads and realize self-centering, high-efficiency, and non-clogging sliding bearing structure in the oil chamber. Background technique [0002] Dynamic and static pressure sliding bearings have been more and more widely used in the field of high-speed and high-precision rotating machinery. In many occasions, the supporting bearings must bear radial loads and axial loads at the same time. A single radial bearing or thrust bearing cannot meet the requirements. , Usually a combination of tapered bearings or radial bearings and plane thrust bearings is used to achieve support. Conical bearings only use one conical surface to work, so the friction power consumption is smaller than that of th...

AI Technical Summary

Problems solved by technology

The conical dynamic and static pressure bearing of this structure utilizes the effects of both static pressure and dynamic pressure at the same time, and the bearing of its structure is only a parallel combination of dynamic pressure and static pressure, which has the characteristics of simple structure and convenient processing; oil chamber (deep cavity, Shallow cavity) due to the many layers, it is difficult to guarantee the neutrality, which causes the axis trajectory to change during the process of starting to normal operation; in addition, the commonly used dynamic and static pressure tapered bearings mostly use external throttling devices such as capillary tubes and small holes, which require Sufficient lubricating oil flow, once the oil passage is blocked somewhere, the oil chamber is very easy to fail due to lack of oil

In addition, the bearing is only suitable for occasions where the external load is constant or the alternating load is small, and it is not suitable for the spindle system of mechanical equipment with large alternating load

Moreover, in order to improve the bearing capacity, this type of bearing is often designed with a larger dynamic pressure chamber and a smaller static pressure chamber, so it is not suitable for the spindle system of rotating machinery with a large self-weight of the equipment.

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