A Preload Adjustable Self-stabilizing Single-sided Thin Film Throttle

Abstract

The invention discloses a self-stabilization single-face thin film restrictor with a prepressure adjusting function. The problem of adjusting prepressure of the single-face thin film restrictor and the problem that prepressure cannot adapt to the working condition are solved, the effect of adjusting prepressure of the restrictor is achieved, and therefore the restrictor is capable of meeting the application requirement of working condition changes. Prepressure fluctuation can be automatically stabilized to stably control the throttling gap and realize the ideal throttling ratio. According to the technical scheme, the self-stabilization single-face thin film restrictor comprises an upper valve body and a lower valve body, an elastic thin film is arranged between the upper valve body and the lower valve body, a prepressure cavity is formed between the bottom of the upper valve body and the elastic thin film and communicated with a throttling conical hole, an adjusting stud is arranged in the throttling conical hole, an upper oil outlet hole is formed in the adjusting stud, and a throttling conical valve is arranged in the upper oil outlet hole through an elastic element in a supported mode; a throttling cavity is formed between the bottom of the lower valve body and the elastic thin film, a throttling table is arranged at the top of the lower valve body, and the throttling cavity is communicated with a lower oil outlet hole through a throttling gap between the throttling table and the elastic thin film.

Description

technical field [0001] The invention relates to the technical field of static pressure in precision machinery, in particular to an adjustable pre-pressure self-stabilizing single-sided film restrictor. Background technique [0002] Hydrostatic technology is widely used in precision machinery, and hydrostatic guide rails, hydrostatic bearings, and hydrostatic screw screws are typical application examples. The restrictor is a key component in these static pressure equipment, and its performance has an important influence on these static pressure equipment. Among them, the film throttle is the most widely used one, which is divided into single-sided film throttle and double-sided film throttle. The single-sided film restrictor can adjust the throttling gap by preloading, so as to achieve the ideal throttling effect, and has been paid attention to in recent years. Germany and Taiwan conducted systematic research and application. [0003] At present, the status quo of the prel...

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Problems solved by technology

[0003] At present, the status quo of the preloaded single-sided film restrictor is that its preload is not adjustable during use, its application range is limited, and it cannot adapt to the requirements of changing working conditions. This not only makes the throttling ratio not in the ideal design state, but also And reduce the load-bearing stiffness, and in worse cases, it will cause the static pressure system to fail

At the same time, during the working process of the existing preloaded single-sided film restrictor, it is impossible to adjust the preload of the restrictor itself according to the change of oil supply pressure or load pressure or other working conditions. adapt to

[0004] To sum up, in the prior art, there is still a lack of an effective solution to the problem of the preload adjustment of the single-sided membrane restrictor and the problem that the preload cannot be adapted to the working conditions.

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