CN205618471U - Anti pulse pneumatic actuator - Google Patents

Abstract

The utility model relates to an anti pulse pneumatic actuator, this anti pulse pneumatic actuator include casing, lower casing, the sealed diaphragm of elasticity, spring, push rod, upward are equipped with the air supply input on the casing, and this air supply input links to each other with external air supply, the one end of push rod and fixed the linking to each other of center of the inboard roof of the sealed diaphragm of elasticity, the sealed diaphragm of elasticity is inboard and be equipped with a spring between the casing down, and the push rod setting is in the spring, be equipped with a damping chamber between spring and the push rod, the push rod pass this damping chamber and with this damping chamber sliding sealed fit, be equipped with the damping ring with damping intracavity wall sliding sealed fit on this push rod, this damping ring is epicoele and cavity of resorption with the inside interval of cavity in damping chamber, still be equipped with a plurality of damping holes on this damping ring, damping intracavity filling liquid attitude medium during the use, when push rod and damping ring remove at the damping intracavity, the medium of damping intracavity forms the damping action through the damping hole between epicoele and cavity of resorption, the action that prevents the push rod is undergone mutation.

Description

A kind of anti-pulse pneumatic executor

Technical field

This utility model relates to actuation technologies field, a kind of anti-pulse pneumatic executor.

Background technology

Executor is widely used in the occasions such as automobile, space flight, industrial equipment action control, and along with the continuous progress of science and technology, the performance requirement of the start components and parts in control system is improved constantly by people, it is desirable to actuator can more precisely work reliably.When control signal be the means such as non-filtered noise reduction process or control signal be air pressure, hydraulic pressure etc. be not easy to the later stage process time, it influences whether execution device accuracy of action, stability and reliability.Executor is the key components that after control signal inputs, action realizes, the reliability of the reliable and stable degree direct influence of its action to whole control system.Common executor is hydraulic pressure or pneumatic structure, its control signal is hydraulic pressure or air pressure, as shown in Figure 1: control gas (liquid) source and entered in sealed volume 7 by input 11, it acts on the pressure on elastic packing diaphragm 6 and promotes spring 8 to compress, push rod 10 export displacement to execution unit 17.Also have and use negative pressure to realize the executor of push rod action, but it is the most all the gas by control signal or liquid acts directly on sealing piston end surface and promotes push rod action to realize.Its simple in construction, it is impossible to realizing input gas or the post processing of liquid control signal, the action of push rod can be because the pulse of control signal and unstability occur that unstable action realizes.This kind of control signal instability is common, and the impact of the action deviation that its driving executor's action produces because of the instability of such control signal is serious, is also undesirable in engineering.

Utility model content

Technical problem to be solved in the utility model is to provide a kind of to be had built-in damping unit, can resist the pulse of control signal and the executor of noise jamming.

In order to solve the problems referred to above, this utility model provides a kind of anti-pulse pneumatic executor, described anti-pulse pneumatic executor includes that upper shell, lower house, elastic packing diaphragm, spring, push rod, the edge of described upper shell, lower house and elastic packing diaphragm rivet together and constitutes a sealing cavity；Described upper shell is provided with air source input end, and this air source input end is connected with external gas source, for inputting the source of the gas as control signal in annular seal space body；One end of described push rod is fixedly linked with the center of elastic packing diaphragm medial roof wall, it is provided with a spring inside described elastic packing diaphragm and between lower house, described push rod is arranged in described spring, and the opposite other end of push rod passes the diapire of described lower house and is connected with the execution unit being in outside lower house；A damping cavity it is provided with between described spring and push rod, described push rod through this damping cavity and coordinates with this damping cavity slipper seal, this push rod is provided with the damping ring coordinated with described damping cavity inwall slipper seal, the inside cavity of damping cavity is spaced apart epicoele and cavity of resorption by this damping ring, multiple damping hole it is additionally provided with on this damping ring, filling liquid medium in described damping cavity during use, when described push rod and damping ring move in damping cavity, liquid medium in damping cavity forms damping action by damping hole between epicoele and cavity of resorption, and the action of anti-throw-out lever is undergone mutation.

Further, described elastic packing diaphragm is that carnival hat type is arranged, and the edge of described upper shell, lower house and carnival hat type elastic packing diaphragm rivets together and constitutes a sealing cavity, and this sealing cavity is divided into two by elastic packing diaphragm, the top of elastic packing diaphragm is sealed volume, and bottom is plunger shaft.

Further, described damping cavity is that tubular is arranged, it is easy to described damping ring realizes being slidably matched in damping cavity.

Further, one end of described spring is fixedly linked with the inner side roof of elastic packing diaphragm, and the other end is fixedly linked with the diapire of lower house, prevents spring moving influence push rod displacement accuracy.

Further, described executor also includes sealing clamp, and one end of described push rod is fixedly linked by the center of sealing clamp with elastic packing diaphragm medial roof wall, it is ensured that the sealing between sealed volume and plunger shaft.

Further, described executor also includes one with the guiding bulb of through hole and sealing ring, described guiding bulb is arranged on the bottom wall outer of lower house, described sealing ring is fixedly mounted between guiding bulb and lower house diapire, described push rod is slidably fitted in the through hole of described guiding bulb, for guiding the direction of motion of push rod.

Further, described damping cavity is fixedly linked with lower house diapire, it is simple to be integrally disposed in by damping unit inside executor, reduces number of devices, beneficially plant maintenance, reduces manufacturing cost.

Further, the plurality of damping hole is evenly distributed on the same circumference centered by push rod, and the damping of formation more equalizes.

The technique effect of utility model: (1) anti-pulse pneumatic executor of the present utility model, relative to prior art, damping unit is arranged on inside executor, when there is pulse ripple in the control signal of executor, its snap pressure in sealed volume drops back to the liquid medium of damped ring and upper and lower intracavity and absorbs, can be prevented effectively from the pulse ripple interference to push rod, the action of anti-throw-out lever is undergone mutation；(2) damping unit is integrally disposed in inside executor, reduces number of devices, beneficially plant maintenance, reduces manufacturing cost；(3) multiple damping holes are evenly distributed on the circumference centered by push rod, and the damping of formation more equalizes.

Accompanying drawing explanation

Below in conjunction with Figure of description, this utility model is described in further detail:

Fig. 1 is the structural representation of a kind of executor of prior art；

Fig. 2 is the structural representation of anti-pulse pneumatic executor of the present utility model.

In figure: upper shell 1, lower house 2, guide bulb 3, sealing ring 4, plunger shaft 5, elastic packing diaphragm 6, sealed volume 7, spring 8, sealing clamp 9, push rod 10, air source input end 11, damping cavity 12, epicoele 13, damping ring 14, cavity of resorption 15, damping hole 16, execution unit 17.

Detailed description of the invention

Embodiment 1

As shown in Figure 2, the anti-pulse pneumatic executor of the present embodiment, including upper shell 1, lower house 2, elastic packing diaphragm 6, spring 8, push rod 10, elastic packing diaphragm 6 is arranged in carnival hat type, the edge of upper shell 1, lower house 2 and carnival hat type elastic packing diaphragm 6 rivets together and constitutes a sealing cavity, this sealing cavity is divided into two by elastic packing diaphragm 6, and wherein the top of elastic packing diaphragm 6 is sealed volume 7, and bottom is plunger shaft 5；Upper shell 1 is provided with air source input end 11, and this air source input end 11 is connected with external gas source, for inputting the compressed air as control signal in sealed volume 7；Inside one end of push rod 10 and carnival hat type elastic packing diaphragm 6, roof is fixedly linked centrally through sealing clamp 9, it is ensured that the sealing between sealed volume 7 and plunger shaft 5.

Being provided with a spring 8 inside carnival hat type elastic packing diaphragm 6 and between lower house 2, one end of spring 8 is fixedly linked with the inner side roof of carnival hat type elastic packing diaphragm 6, and the other end is fixedly linked with the diapire of lower house 2, prevents spring 8 from moving；Push rod 10 is arranged in spring 8, push rod 10 is arranged through the diapire of lower house 2 also cross the through hole guiding bulb 3 being arranged on lower house 2 bottom wall outer, guide and be provided with sealing ring 4 between bulb 3 and lower house 2 diapire, push rod 10 is slidably fitted in the through hole guiding bulb 3, its end is connected with the execution unit 17 being in outside guiding bulb 3, is used for driving execution unit 17 to move.

A tubular damping cavity 12 it is provided with between spring 8 and push rod 10, this damping cavity 12 is fixedly linked with lower house 2 diapire, filling liquid force feed (other embodiments can be water) in this damping cavity 12, push rod 10 through this damping cavity 12 and coordinates with this damping cavity 12 slipper seal, this push rod 10 is provided with the damping ring 14 coordinated with damping cavity 12 inwall slipper seal, the inside cavity of damping cavity 12 is spaced apart epicoele 13 and cavity of resorption 15 by this damping ring 14, and this damping ring 14 is uniformly distributed on the same circumference centered by push rod multiple damping hole 16.

In sealed volume 7, input the compressed air as control signal through air source input end 11 when this anti-pulse pneumatic executor uses, promote elastic packing diaphragm 6 to drive push rod 10 to compress downwards in plunger shaft 5, thus promote execution unit 17 to perform the action preset；As the compressed air of control signal run into pulse generation change suddenly time, the medium in damping cavity 12 forms damping action by damping hole 16 between epicoele 13 and cavity of resorption 15, the action of anti-throw-out lever 10 is undergone mutation, thus reaches the function of elimination pulse.

The labile pulse of control signal is rushed in row post processing by this utility model, utilize damping system that the unstable noise of pulse signal source is carried out post processing, the signal processing under specific engineering applications and action realization can be realized by designing different damping values, on the premise of not increasing other infrastructure cost of control system, directly obtain reliable and stable control signal, the pulsing effect of control signal can be resisted, there is shock resistance, vibration resistance, the advantage such as reliable and stable.Not only increase operation precision and the stability of execution device, also improve controllability and the service life of system

Obviously, above-described embodiment is only for clearly demonstrating this utility model example, and is not the restriction to embodiment of the present utility model.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here without also cannot all of embodiment be given exhaustive.And these belong to obvious change or variation that spirit of the present utility model extended out still in protection domain of the present utility model among.

Claims (5)

1. an anti-pulse pneumatic executor, it is characterized in that, including: upper shell (1), lower house (2), elastic packing diaphragm (6), spring (8), push rod (10), described spring (8) is arranged between elastic packing diaphragm (6) inner side and lower house (2), and described push rod (10) is arranged in described spring (5)；nullDescribed upper shell (1) is provided with air source input end (11)，This air source input end (11) is connected with external gas source，A damping cavity (12) it is provided with between described spring (8) and push rod (10)，Described damping cavity (12) interior filling liquid medium，Described push rod (10) arranges through this damping cavity (12) and coordinates with this damping cavity (12) slipper seal，The damping ring (14) coordinated with described damping cavity (12) inwall slipper seal it is additionally provided with on this push rod (10)，The inside cavity of damping cavity (12) is spaced apart epicoele (13) and cavity of resorption (15) by this damping ring (14)，Multiple damping hole (16) it is additionally provided with on this damping ring (14)，When described push rod (10) and damping ring (14) move in damping cavity (12)，Liquid medium in damping cavity (12) forms damping action by damping hole (16) between epicoele (13) and cavity of resorption (15).

Anti-pulse pneumatic executor the most according to claim 1, it is characterized in that, described elastic packing diaphragm (6) is arranged in carnival hat type, the edge of described upper shell (1), lower house (2) and carnival hat type elastic packing diaphragm (6) rivets together and constitutes a sealing cavity, this sealing cavity is divided into two by elastic packing diaphragm (6), the top of this elastic packing diaphragm (6) is sealed volume (7), and bottom is plunger shaft (5).

Anti-pulse pneumatic executor the most according to claim 2, it is characterised in that one end of described spring (8) is fixedly linked with the inner side roof of elastic packing diaphragm (6), and the other end is fixedly linked with the diapire of lower house (2).

Anti-pulse pneumatic executor the most according to claim 1, it is characterised in that described executor also includes sealing clamp (9), one end of described push rod (10) is fixedly linked by the center of sealing clamp (9) with elastic packing diaphragm (6) inner side roof.

Anti-pulse pneumatic executor the most according to claim 3, it is characterised in that the plurality of damping hole (16) is evenly distributed on the same circumference centered by push rod (10).