CN202418848U

CN202418848U - Linear actuating mechanism

Info

Publication number: CN202418848U
Application number: CN 201120565293
Authority: CN
Inventors: 沈杰; 龚达飞
Original assignee: SUZHOU DELAN ENERGY TECHNOLOGY Co Ltd
Current assignee: SUZHOU DELAN ENERGY SCIENCE & TECHNOLOGY CORP., LTD.
Priority date: 2011-12-30
Filing date: 2011-12-30
Publication date: 2012-09-05
Anticipated expiration: 2021-12-30

Abstract

The utility model provides a linear actuating mechanism. The linear actuating mechanism comprises an upper fixed sleeve, a lower fixed sleeve and a rotating shaft which are arranged in sequence from top to bottom, wherein the rotating shaft penetrates through the center of an actuating mechanism enclosed by the upper fixed sleeve and the lower fixed sleeve. The linear actuating mechanism is characterized in that in the actuating cavity, the rotating shaft penetrates through a thrust ball bearing, a lower thread sleeve, an inner thread sleeve and a rod sleeve downwards in sequence, and then a pressing shaft fixedly connected with the inner thread sleeve in the actuating cavity extends out and penetrates through a nut; and the pressing shaft is connected with a valve rod; the thrust ball bearing converts the rotating force of the rotating shaft into thrust or tension in the vertical direction so as to push or pull the inner thread sleeve and the lower thread sleeve outside the rotating shaft to do an up-down movement and drive the pressing shaft to do an up-down movement in the vertical direction. The linear actuating mechanism provided by the utility model is simple in structure and convenient in assembly, and is used for connecting an electric actuating mechanism and a valve; and the rotating shaft rotates to drive the pressing shaft to do the up-down movement and drive the valve rod of the valve to do the up-down movement so as to realize opening and closing of the valve.

Description

A kind of linear actuator

Technical field

The utility model relates to valve technology field, relates more specifically to a kind of linear actuator of valve.

Background technique

The opening and closing of valve are through the realization that moves up and down of valve rod, and nonlinear Flow-rate adjustment can cause the waste of fluid resources and the aggravation of valve wearing and tearing, realize that therefore the linearly adjust of opening and closing of valve is particularly important.

Summary of the invention

The utility model is accomplished in order to solve deficiency of the prior art; The purpose of the utility model provides linear actuator a kind of simple in structure, easy to assembly, is used to connect the valve rod of electric performance device and valve; During work; Electric actuator drives rotating shaft and rotates, and does straight line motion under the rotating shaft rotating band dynamic pressure axially, realizes linearly adjust.

The technological scheme of the utility model is:

A kind of linear actuator comprises fixed cover, following fixed cover and the rotating shaft of passing the center in the execution chamber that is surrounded by last fixed cover, following fixed cover from top to bottom successively, it is characterized in that:

In said execution chamber, rotating shaft pass successively downwards thrust ball bearing, down thread bush, inner screw sheath and bar cover back by with carry out the chamber in the last item that is fixedly connected of inner screw sheath stretch out and pass nut, last item is connected with valve rod; Said thrust ball bearing converts the rotatory force of rotating shaft the thrust or the pulling force of Vertical direction into, promotes or pulling is located at the outer inner screw sheath of rotating shaft and moves up and down with following screw thread, and drives said last item Vertical direction and move up and down.

Further,

In said execution chamber, the inwall of fixed cover and following fixed cover is provided with gland on the next-door neighbour, and the outer wall of the upper and lower of gland is fixedly connected with following fixed cover with last fixed cover through steel traveler respectively, and gland is positioned at carries out the chamber, stablizes motionless.

Again further,

In carrying out the chamber; Following thread bush between inner screw sheath and the rotating shaft, be positioned at thrust ball bearing below and the inwall setting on top of next-door neighbour's inner screw sheath; Said thread bush down is threaded with said rotating shaft; The said position of thread bush down is higher than inner screw sheath, and following thread bush is fixedly connected through straight pin with inner screw sheath.

Said going up on the fixed cover fixedly installs electric performance device, and the upper end of said rotating shaft is connected with said electric performance device.

Said fixed cover down is connected through bolt with valve rack.

Said last item uses with said valve rod fixture block is connected.

The inside recessed formation groove of wall in the bottom of said gland is inlayed rubber seal in the said groove, and said gland and said inner screw sheath seal through said rubber seal

The linear actuator of the utility model is simple in structure; Easy to assembly; Be used to connect electronic execution architecture and valve, rotate when the rotating shaft of electric performance device rotating band moving-wire property actuator, rotating shaft is rotated last item is moved up and down; The drive valve rod moves up and down, and realizes the opening and closing of valve.

Description of drawings

Fig. 1 is the structural representation of the linear actuator of the utility model.

Description of reference numerals

1, last item 2, nut 3, bar cover 4, following fixed cover 5, rubber seal

6, gland 7, inner screw sheath 8, execution chamber 9, flat key 10, following thread bush

11, straight pin 12, steel traveler 13, last fixed cover 14, thrust ball bearing

15, rubber sleeve 16, dust cover 17, rotating shaft

Specific embodiments

Below in conjunction with accompanying drawing the utility model is done further explain.

A kind of linear actuator of the utility model as shown in Figure 1 comprises fixed cover 13, following fixed cover 4 and passing by last fixed cover 13, the rotating shaft 17 at the center in the execution chamber 8 that surrounds of fixed cover 4 down from top to bottom successively.

The upper end of rotating shaft 17 is connected with the electric performance device (not shown);

In the execution chamber, thrust ball bearing 14 is passed in rotating shaft 17 downwards successively, thread bush 10, inner screw sheath 7 and bar cover 3 backs are stretched out by the last item that is fixedly connected with execution chamber inner screw sheath and passed nut 2 down, and last item 1 is connected with the valve rod (not shown) then.

In carrying out the chamber, fixed cover 13 is provided with gland 6 with following fixed cover 4 next-door neighbour on, and the outer wall of the upper and lower of gland 6 passes through steel traveler 12 respectively and is fixedly connected with following fixed cover 4 with last fixed cover 13, and assurance is positioned at the execution chamber and stablizes motionless.

In carrying out the chamber, between gland 6 and rotating shaft, and the inwall of the bottom of next-door neighbour's gland 6 is established inner screw sheath 7;

In carrying out the chamber; Following thread bush 10 between inner screw sheath 7 and the rotating shaft 17, be positioned at thrust ball bearing 14 below and the inwall setting on top of next-door neighbour's inner screw sheath 7; Following thread bush is threaded with rotating shaft; The position of following thread bush is higher than inner screw sheath, and following thread bush is fixedly connected through straight pin 11 with inner screw sheath, and straight pin 11 is used to prevent down the rotation of thread bush and inner screw sheath.Between the inwall on the top of inner screw sheath 7 and gland 6, be provided with flat key 9, flat key 9 plays the effect that prevents that inner screw sheath from rotating.。

Rotating shaft 17 is threaded with following thread bush 10; Thrust ball bearing 14 converts the rotatory force of rotating shaft 17 into the thrust or the pulling force of Vertical direction; Promotion or drive thread bush 10 down move up and down with inner screw sheath 7, thereby drive nut 2 and last item move up and down, and then the drive valve rod moves up and down.

In this example, fixedly install the electric performance device (not shown) on the last fixed cover 13, the upper end of rotating shaft is connected with electric performance device.

In this example, following fixed cover 4 is connected through bolt with the valve rack (not shown).

In this example, last item uses with the valve rod (not shown) fixture block is connected.

In this example, the inside recessed formation groove of the wall of the bottom of gland 6 is inlayed rubber seal 5 in the groove; Gland 6 seals through rubber seal 5 with inner screw sheath 7; Guarantee that the internal lubrication grease does not leak out, keep the neat and tidy of valve and annex, can avoid frequent the oiling to safeguard simultaneously.

The linear actuator of the utility model is simple in structure; Easy to assembly, be used to connect electric performance device and valve, when the rotating shaft of electric performance device rotating band moving-wire property actuator is rotated; Rotating shaft is rotated last item is moved up and down, and realizes the opening and closing of valve.

The above; It only is the preferred embodiment of the utility model; Be not that the utility model is done any pro forma restriction; Every technical spirit according to the utility model all still belongs to the protection domain of the utility model technological scheme to any simple modification, equivalent variations and modification that above embodiment did.

Claims

1. a linear actuator comprises fixed cover, following fixed cover and the rotating shaft of passing the center in the execution chamber that is surrounded by last fixed cover, following fixed cover from top to bottom successively, it is characterized in that:

2. linear actuator according to claim 1; It is characterized in that: in said execution chamber; The inwall of fixed cover and following fixed cover is provided with gland on the next-door neighbour; The outer wall of the upper and lower of gland is fixedly connected with following fixed cover with last fixed cover through steel traveler respectively, and gland is positioned at carries out the chamber, stablizes motionless.

3. linear actuator according to claim 2; It is characterized in that: in carrying out the chamber; Following thread bush between inner screw sheath and the rotating shaft, be positioned at thrust ball bearing below and the inwall setting on top of next-door neighbour's inner screw sheath; Said thread bush down is threaded with said rotating shaft, and the said position of thread bush down is higher than inner screw sheath, and following thread bush is fixedly connected through straight pin with inner screw sheath.

4. linear actuator according to claim 3 is characterized in that: said going up on the fixed cover fixedly installs electric performance device, and the upper end of said rotating shaft is connected with said electric performance device.

5. linear actuator according to claim 4 is characterized in that: said fixed cover down is connected through bolt with valve rack.

6. linear actuator according to claim 5 is characterized in that: said last item uses with said valve rod fixture block is connected.

7. linear actuator according to claim 6 is characterized in that: the inside recessed formation groove of the wall of the bottom of said gland, inlay rubber seal in the said groove, and said gland and said inner screw sheath seal through said rubber seal.