CN203363354U - Electric valve actuator worm shaft sleeve structure - Google Patents
Electric valve actuator worm shaft sleeve structure Download PDFInfo
- Publication number
- CN203363354U CN203363354U CN 201320323237 CN201320323237U CN203363354U CN 203363354 U CN203363354 U CN 203363354U CN 201320323237 CN201320323237 CN 201320323237 CN 201320323237 U CN201320323237 U CN 201320323237U CN 203363354 U CN203363354 U CN 203363354U
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- China
- Prior art keywords
- dish spring
- worm shaft
- bearing
- spielpassung
- torque
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Gears, Cams (AREA)
- Mechanically-Actuated Valves (AREA)
- Electrically Driven Valve-Operating Means (AREA)
Abstract
The utility model discloses an electric valve actuator worm shaft sleeve structure which is assembled on a box body. The electric valve actuator worm shaft sleeve structure is characterized by comprising a worm shaft, a torque rack, a torque rack cushion, a check ring used for a hole, a bearing a, a nut b, a conical-end set screw, a thrust cushion piece c, a disc spring base, a disc spring c, a partition sleeve, a disc spring adjusting cushion b, a nut c, a thrust cushion d and a disc spring cover. The electric valve actuator worm shaft sleeve structure has the advantages that the thrust cushion c, the disc spring base and the thrust cushion d are no longer in contact with a worm shaft, and when an electric device works normally or does not work, the bearing a is not stressed. The bearing is not damaged, a worm can operate normally, the normal working of the electric device is guaranteed, and other problems caused by unbalanced force stressed by bearings in the prior art are solved.
Description
(1) technical field:
The utility model belongs to the electric device for valve technical field, relates to electric device for valve worm screw axial region nested structure.
(2) background technique:
Electric device for valve is to be used in conjunction with valve, to valve opened, a kind of actuator of closing control.The worm screw that in electric device for valve, the worm screw axial region puts and the engagement of the worm gear on output shaft make output shaft rotation, and output shaft rises valve rod or descend by Stem Mut to realize the opening and closing of valve.When the valve plate of valve runs into jam, output shaft and on worm gear stop operating, now worm shaft is moved horizontally by axial force, be equipped with the torque tooth bar on worm shaft, the movement of worm shaft can make torque tooth bar 24 and torque control division put torque gear 26 engagement driving, the torque gear 26 shake-up torque switch that rotates to an angle, realize the torque of valve is controlled.Therefore the worm screw axial region is enclosed within electric device for valve the important effect of playing.Electric actuator worm shaft High Rotation Speed when running well in addition, so the design of worm screw axial region cover should be considered from reliable and secure angle.
Electric device for valve worm screw axial region nested structure in known technology is shown in Fig. 1, and torque rack pad 2 is by being fixed on worm shaft with elastic cylindrical pin 1 and then to bearing a3 axial restraint.Bearing a3 is installed on worm shaft 13 by interference fit.Thurst washer a4, dottle pin 6, Thurst washer b9, be installed on worm shaft 13 by Spielpassung, and it is upper that dish spring a5 is installed on Thurst washer a4 by Spielpassung, and dish spring b7 is installed on Thurst washer b9 by Spielpassung.Bearing b10 is installed on worm shaft 13 by interference fit.Lock pad 11 is installed on worm shaft 13 by Spielpassung, and nut a12 is threaded connection and is installed on worm shaft 13, and then compresses lock pad 11.This structure exists following not enough: when the Electric actuator Open valve, because detent torque is larger, worm shaft 13 can be subject to certain axial force, and it is moved to the left or to the right.Therefore should be first before Electric actuator work rationally pretension dish spring a5 and dish spring b7, while preventing that it from not reaching the setpoint torque value, worm shaft 13 is owing to moved left and right by axial force to trigger torque switch to force Electric actuator to quit work in advance.The pretension of dish spring a5 and dish spring b7 is by rotating nut a12, and now bearing b10 inner ring is subject to lock pad 11 axial force left, and bearing b10 outer ring is subject to Thurst washer b9 axial force to the right.The axial force opposite direction that bearing b10 Internal and external cycle is suffered.In known technology, selected bearing b10 is deep groove ball bearing, and it is not subject to axial force in theory, even it has certain aligning effect also can only bear slight axial force.And suffered axial force is greater than its thrust load that can bear by this airframe bearing, can greatly reduce like this working life of bearing.When running into valve plate and the seal for pipe joints tension of special circumstances as valve jam or valve, while needing the larger torque of Electric actuator output, now dish spring decrement is very large, make inner ring and the outer ring of bearing b10 bear larger axial force, following situation 1 may occur with this understanding, bearing axial play diminishes, the retainer distortion, bearing failure makes its outer ring rotate together with inner ring.Now bearing b10 outer ring and Thurst washer 9 frictions produce noise heating.2, can directly cause broken bearing, worm screw axial region cover and torque control division sleeve were lost efficacy, electric device for valve can't work.
(3) model utility content:
The purpose of this utility model is to provide a kind of electric device for valve worm screw axial region nested structure, has solved the technical problem existed in the known technology, is the electric device for valve worm screw axial region nested structure that a kind of reliability is high.
The technical solution of the utility model: electric device for valve worm screw axial region nested structure, be assemblied on casing, it is characterized in that it comprises worm shaft, torque tooth bar, torque rack pad, back-up ring, bearing a, nut b, cone end Cock screw, Thurst washer c, dish spring abutment, dish spring c, spacer, dish spring spacer b, nut c, Thurst washer d and dish spring lid for hole; Described torque tooth bar is arranged on worm shaft by Spielpassung; Described torque rack pad is fixed on worm shaft by Spielpassung; Described bearing a is installed on worm shaft by interference fit; Described nut b, by being threaded with worm shaft, is axially fixed at bearing a and torque tooth bar on worm shaft; Described cone end Cock screw is threaded connection nut b is fixed on worm shaft; Thereby described dish spring abutment uses back-up ring to be connected axial restraint with bearing a outer ring by hole; Described dish spring abutment outer cylinder is radially fixing on casing by Spielpassung; Described Thurst washer c endoporus, dish spring c, dish spring spacer b, Thurst washer d endoporus are installed on the dish spring abutment by Spielpassung successively; Described Thurst washer c outer cylinder is installed on casing by Spielpassung; Described Thurst washer d outer cylinder is installed on the dish spring by Spielpassung and covers; Described dish spring lid is fixed on casing; Described spacer is installed between dish spring c and casing by Spielpassung; Described nut c is threaded connection and is installed on the dish spring abutment, compresses Thurst washer d.
Dish spring lid described above is bolted on casing.
Working principle of the present utility model and working procedure: electric device for valve is to be used in conjunction with valve, to valve opened, a kind of actuator of closing control.The worm screw that in electric device for valve, the worm screw axial region puts and the engagement of the worm gear on output shaft make output shaft rotation, and output shaft rises valve rod or descend by Stem Mut to realize the opening and closing of valve.When the valve plate of valve runs into jam, output shaft and on worm gear stop operating.Now worm shaft is subject to axial force, but due to the compressed pretension of dish spring c, cause Thurst washer c be used on casing to masterpiece by dish spring c-axis, Thurst washer d also is subject to dish spring c-axis to be used in the dish spring to masterpiece to cover, so only have when the suffered axial force of worm shaft is greater than the pretightening force of dish spring c setting, the inner ring that worm shaft just can pull or promote bearing a makes bearing a outer ring pull or promote the dish spring abutment, and then pulls Thurst washer d or promotion Thurst washer c to make dish spring c compression.Worm shaft is realized horizontal motion, and the horizontal motion meeting of worm shaft makes torque tooth bar and torque control division put the torque meshed transmission gear, and the torque gear shake-up torque switch that rotates to an angle is realized the torque of valve is controlled.When running into special circumstances and need Electric actuator output peak torque, dish spring c is compressed to spacer and Thurst washer d bumps, and spacer plays the effect of protecting dish spring c.
Advantage of the present utility model and good effect: in the utility model, Thurst washer c, dish spring abutment, Thurst washer d no longer contact with worm shaft, and bearing a when working and not working is neither stressed for Electric actuator.Bearing is not destroyed, and worm screw runs well, and guarantees the Electric actuator normal operation, has solved the other problems that caused by unbalanced force because of bearing in the known technology.
(4) accompanying drawing explanation:
The structural representation that Fig. 1 is the electric device for valve worm screw axial region cover in known technology.
The structural representation that Fig. 2 is the related electric device for valve worm screw of the utility model axial region cover.In figure: 1 is elastic cylindrical pin, and 2 is the torque rack pad, and 3 is bearing a, 4 is Thurst washer a, and 5 is dish spring a, and 6 is dottle pin, 7 is dish spring b, and 8 is dish spring spacer a, and 9 is Thurst washer b, 10 is bearing b, and 11 is lock pad, and 12 is nut a, 13 is worm shaft, and 14 is the hole back-up ring, and 15 is nut b, 16 is cone end Cock screw, and 17 is Thurst washer c, and 18 is the dish spring abutment, 19 is dish spring c, and 20 is spacer, and 21 is dish spring spacer b, 22 is Thurst washer d, 23 is nut c, and 24 is the torque tooth bar, and 25 is dish spring lid, 26 is the torque gear, and 27 is casing.
(5) embodiment:
For further understanding content of the present utility model, Characteristic, hereby exemplify following examples, and coordinate accompanying drawing to be described in detail as follows:
Embodiment: electric device for valve worm screw axial region nested structure (see figure 2), be assemblied on casing 27, it is characterized in that it comprises worm shaft 13, torque tooth bar 24, torque rack pad 2, back-up ring 14, bearing a3, nut b15, cone end Cock screw 16, Thurst washer c17, dish spring abutment 18, dish spring c19, spacer 20, dish spring spacer b21, nut c23, Thurst washer d22 and dish spring lid 25 for hole; Described torque tooth bar 24 is arranged on worm shaft 13 by Spielpassung; Described torque rack pad 2 is fixed on worm shaft 13 by Spielpassung; Described bearing a3 is installed on worm shaft 13 by interference fit; Described nut b15, by being threaded with worm shaft 13, is axially fixed at bearing a3 and torque tooth bar 24 on worm shaft 13; Described cone end Cock screw 16 is threaded connection nut b15 is fixed on worm shaft 13; Thereby described dish spring abutment 18 uses back-up ring 14 to be connected axial restraint with bearing a3 outer ring by hole; Dish spring abutment 18 outer cylinder are radially fixing on casing 27 by Spielpassung; Described Thurst washer c17 endoporus, dish spring c19, dish spring spacer b21, Thurst washer d22 endoporus are installed on dish spring abutment 18 by Spielpassung successively; Described Thurst washer c17 outer cylinder is installed on casing 27 by Spielpassung; Described Thurst washer d22 outer cylinder is installed on dish spring lid 25 by Spielpassung; Described dish spring lid 25 is fixed on casing 27; Described spacer 20 is installed between dish spring c19 and casing 27 by Spielpassung; Described nut c23 is threaded connection and is installed on dish spring abutment 18, compresses Thurst washer d22.
Dish spring lid 25 described above is bolted on casing 27.
Claims (2)
1. electric device for valve worm screw axial region nested structure, be assemblied on casing, it is characterized in that it comprises worm shaft, torque tooth bar, torque rack pad, back-up ring, bearing a, nut b, cone end Cock screw, Thurst washer c, dish spring abutment, dish spring c, spacer, dish spring spacer b, nut c, Thurst washer d and dish spring lid for hole; Described torque tooth bar is arranged on worm shaft by Spielpassung; Described torque rack pad is fixed on worm shaft by Spielpassung; Described bearing a is installed on worm shaft by interference fit; Described nut b, by being threaded with worm shaft, is axially fixed at bearing a and torque tooth bar on worm shaft; Described cone end Cock screw is threaded connection nut b is fixed on worm shaft; Thereby described dish spring abutment uses back-up ring to be connected axial restraint with bearing a outer ring by hole; Described dish spring abutment outer cylinder is radially fixing on casing by Spielpassung; Described Thurst washer c endoporus, dish spring c, dish spring spacer b, Thurst washer d endoporus are installed on the dish spring abutment by Spielpassung successively; Described Thurst washer c outer cylinder is installed on casing by Spielpassung; Described Thurst washer d outer cylinder is installed on the dish spring by Spielpassung and covers; Described dish spring lid is fixed on casing; Described spacer is installed between dish spring c and casing by Spielpassung; Described nut c is threaded connection and is installed on the dish spring abutment, compresses Thurst washer d.
2. electric device for valve worm screw axial region nested structure according to claim 1, is characterized in that described dish spring lid is bolted on casing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320323237 CN203363354U (en) | 2013-06-06 | 2013-06-06 | Electric valve actuator worm shaft sleeve structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320323237 CN203363354U (en) | 2013-06-06 | 2013-06-06 | Electric valve actuator worm shaft sleeve structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203363354U true CN203363354U (en) | 2013-12-25 |
Family
ID=49811116
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320323237 Expired - Fee Related CN203363354U (en) | 2013-06-06 | 2013-06-06 | Electric valve actuator worm shaft sleeve structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203363354U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104772370A (en) * | 2015-04-23 | 2015-07-15 | 浙江久立特材科技股份有限公司 | Angle adjusting mechanism for lower roller of straightening machine |
| CN105422957A (en) * | 2015-12-16 | 2016-03-23 | 常州电站辅机总厂有限公司 | Velva electric device |
-
2013
- 2013-06-06 CN CN 201320323237 patent/CN203363354U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104772370A (en) * | 2015-04-23 | 2015-07-15 | 浙江久立特材科技股份有限公司 | Angle adjusting mechanism for lower roller of straightening machine |
| CN104772370B (en) * | 2015-04-23 | 2017-05-10 | 浙江久立特材科技股份有限公司 | Angle adjusting mechanism for lower roller of straightening machine |
| CN105422957A (en) * | 2015-12-16 | 2016-03-23 | 常州电站辅机总厂有限公司 | Velva electric device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131225 Termination date: 20160606 |