Built-in single-face thin-film throttling static-pressure lead screw pair

Abstract

The invention discloses a built-in single-face thin-film throttling static-pressure lead screw pair, and relates to the technical field of static-pressure spiral transmission. The built-in single-facethin-film throttling static-pressure lead screw pair comprises a lead screw, and further comprises a nut matched with the lead screw, wherein the nut comprises an inner sleeve, an outer sleeve and aplurality of thin films, the inner sleeve and the outer sleeve cooperate with each other, static pressure oil cavities are formed in at least two circles of threads on the inner spiral surface of theside, same as the side where the threads, matched with the lead screw, of the inner sleeve are located, at least three static pressure oil cavities are formed in each circle of the thread of the innersleeve, grooves A corresponding to the static pressure oil cavities are formed in the outer cylindrical surface of the inner sleeve, bosses are arranged in the grooves A, thin film grooves for containing thin films are formed in the top ends of the grooves A, when the thin films are installed in the thin film grooves, throttling gaps are formed between the thin films and the bosses. The lead screw pair has the beneficial effects that the independent work of all the oil cavities is realized, the defect that the throttling performance is poor due to the fact that the gaps of all the oil cavities are inconsistent is avoided; and a complex oil supply pipeline is avoided, the variable throttling feedback sensitivity is improved, and the throttling performance is improved.

Description

technical field [0001] The invention relates to the technical field of static pressure screw transmission, in particular to a built-in single-sided film throttling static pressure lead screw pair. Background technique [0002] With the continuous development of CNC machine tools in the direction of high speed, heavy load, and precision, the most widely used ball screw pair in this field has gradually exposed some inherent defects due to its own structure, such as contact wear, high-speed collision, and heavy-load pitting. And so on, and the difficulty and cost of solving are getting bigger and bigger. People began to turn their attention to linear motors and hydrostatic screw pairs. [0003] Although the linear motor has advantages in high speed, its control system is complex, technically difficult, poor in anti-interference, and high in cost, which greatly limits its popularization and application. There is a layer of pressure oil film between the threaded surface of the ...

AI Technical Summary

Problems solved by technology

However, the feedback effect of the spool valve is realized by the movement of the spool valve, and because the flow rate is only inversely proportional to the first power of the throttle length of the spool valve, and the movement of the spool valve depends on the deformation of the balance spring to balance the force, so Poor sensitivity of spool valve feedback

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