CN215109060U - Electric barring mechanism for steam turbine - Google Patents

Abstract

The utility model discloses a steam turbine is with electric driving disk car mechanism mainly relates to barring structure field. The automatic spring swinging device comprises a shell, wherein a swinging plate is connected in the shell in a rotating manner, a driving wheel meshed with a plate wheel is arranged on the swinging plate, a torsion spring is arranged between the shell and the swinging plate, a positioning groove is formed in one end of the swinging plate, a positioning rod matched with the positioning groove is connected to the shell in a sliding manner, a top block is arranged at the other end of the swinging plate, a contact rod is connected to the shell in a sliding manner, the bottom of the contact rod is located at the tail end of the rotation path of the top block, a telescopic rod is arranged in the shell, the bottom movable end of the telescopic rod is in contact with the swinging plate, a movable contact is arranged on the contact rod, a static contact is arranged on the shell, and the movable contact and the static contact are electrically connected with the telescopic rod. The beneficial effects of the utility model reside in that: the turning gear mechanism can timely separate the turning gear structure from the rotor after turning is completed, reduces the abrasion of the gear and ensures the service life of the gear.

Description

Electric barring mechanism for steam turbine

Technical Field

The utility model relates to a barring structure field specifically is a motor-driven barring mechanism for steam turbine.

Background

In order to avoid the rotor bending caused by the temperature difference between the upper side and the lower side of the rotor when the steam turbine is started and stopped, the turning structure is used for turning the rotor to keep the rotor rotating at a low speed, thereby reducing the influence of the temperature difference between the upper side and the lower side, but in the process that the existing electric barring structure is separated from the rotor after the barring is finished, usually, the rotation speed difference between the two is utilized to push the barring structure to automatically move upwards, so that the matching of the positioning rod and the positioning groove is realized to separate the driving wheel from the barring wheel on the rotor, but the distance for pushing the barring gear to move upwards by the speed difference is limited, so that the situation that the positioning groove does not move in place often occurs, thereby can't make locating lever and constant head tank cooperation realize breaking away from, often need manual operation to carry out breaking away from of barring structure, it is comparatively inconvenient to use, can't break away from for a long time and cause lasting impact wear to the gear of barring structure, reduced its life.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an electronic barring mechanism for steam turbine, it in time makes barring structure and rotor break away from after the barring is accomplished, has reduced the wearing and tearing of gear, guarantees its life.

The utility model discloses a realize above-mentioned purpose, realize through following technical scheme:

the utility model provides a steam turbine is with electronic driving disc car mechanism, includes the casing, the casing internal rotation is connected with the swing board, be equipped with on the swing board with set wheel mesh's drive wheel, be equipped with the torsional spring between casing and the swing board, the one end of swing board is equipped with the constant head tank, sliding connection has the locating lever that the cooperation constant head tank used on the casing, the other end of swing board is equipped with the kicking block, sliding connection has the feeler lever on the casing, the bottom of feeler lever is located the terminal in kicking block rotation route, be equipped with the telescopic link in the casing, the bottom expansion end and the swing board of telescopic link contact, be equipped with the movable contact on the feeler lever, be equipped with the stationary contact on the casing, movable contact, stationary contact all are connected with the telescopic link electricity.

Furthermore, a sliding sleeve is arranged on the shell, the feeler lever is connected inside the sliding sleeve in a sliding mode, a compression spring is arranged between the top of the feeler lever and the top of the sliding sleeve, and the moving contact is located above the fixed contact.

Furthermore, the movable ends of the top block and the bottom of the telescopic rod are provided with rotating wheels.

Further, the rotation position of the swing plate and the housing is located between the middle part and the end part of the swing plate.

Furthermore, the end part of the positioning rod is provided with a roller wheel, and the roller wheel is connected in the positioning groove in a rolling manner.

Contrast prior art, the beneficial effects of the utility model reside in that:

1. the utility model discloses rotate in the inside of casing and set up the swing board, the one end of swing board sets up the kicking block, the inside of casing sets up the feeler lever, the driving wheel on the swing board meshes with the dish wheel on the rotor after the swing board rotates and carries out the barring operation, the kicking block contacts with the bottom of feeler lever this moment and promotes movable contact and the stationary contact separation on it, after the barring is accomplished, because the difference dish wheel of rotational speed promotes the driving wheel upward movement, make kicking block and feeler lever separation, movable contact and stationary contact, control telescopic link carries out the extension operation, the bottom expansion end of telescopic link promotes the swing board and rotates, make the constant head tank rotate to the position of locating lever and coordinate the back and fix a position the swing board, make the constant head tank can accurately move to the position of locating lever, guarantee the promptness that the swing board breaks away from, do not need the manual breaking away from, it is more convenient to use, avoid the impulsive force that causes the driving wheel for a long time, the service life of the barring structure is prolonged;

2. set up the torsional spring between swing board and casing, the locating lever makes swing board automatic swing realize the meshing of drive wheel and barring wheel under the effect of torsional spring after breaking away from with the constant head tank, do not need manual control, it is more convenient to make the barring operation, swing board rotates the automatic rotation of in-process drive kicking block, make the kicking block contact with the bottom of feeler lever and realize the autosegregation of movable contact and stationary contact, automatic control is realized in the linkage of whole device, the operation is more smooth, manual operation's step has been reduced, barring efficiency is higher.

Drawings

Fig. 1 is a schematic perspective view of the present invention.

Fig. 2 is a right side view of the present invention.

Fig. 3 is a sectional view taken along the direction a-a in fig. 2 according to the present invention.

Fig. 4 is a partially enlarged view of a portion B in fig. 3 according to the present invention.

Reference numerals shown in the drawings:

1. a housing; 2. a swing plate; 3. turning wheels; 4. a drive wheel; 5. a torsion spring; 6. positioning a groove; 7. positioning a rod; 8. a top block; 9. a feeler lever; 10. a telescopic rod; 11. a movable contact; 12. a stationary contact; 13. a sliding sleeve; 14. a compression spring; 15. a rotating wheel; 16. and a roller.

Detailed Description

The present invention will be further described with reference to the following specific examples. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teachings of the present invention, and these equivalents also fall within the scope defined in the present application.

The utility model relates to an electric drive barring mechanism for a steam turbine, which comprises a main body structure and a shell 1, wherein the shell 1 is used as a protection structure and a supporting structure of a barring structure, a swinging plate 2 is rotatably connected in the shell 1 through a rotating shaft, a driving wheel 4 meshed with a barring wheel 3 is arranged on the swinging plate 2, a motor is particularly arranged on the swinging plate, the motor is connected with the driving wheel 4 through a speed reducer to drive the swinging plate to rotate as a driving part of the barring structure, a torsion spring 5 is arranged between the shell 1 and the swinging plate 2, a positioning groove 6 is arranged at one end of the swinging plate 2, a positioning rod 7 matched with the positioning groove 6 for use is slidably connected on the shell 1, the torsion spring 5 is compressed after the positioning rod 7 is inserted into the positioning groove 6 to fix the swinging plate 2, and the swinging plate 2 is driven to automatically rotate under the action of the torsion spring 5 after the positioning rod 7 is separated from the positioning groove 6, the driving wheel 4 is automatically meshed with the turning wheel 3 to turn the turning operation, the operation is more convenient, the steps of manual operation are reduced, the positioning rod 7 can be pushed to move by an electric push rod or an air cylinder, the positioning operation on the swinging plate 2 is more convenient, the other end of the swinging plate 2 is welded or fixed with the ejector block 8 through a bolt, the shell 1 is slidably connected with the touch rod 9, the touch rod 9 slides up and down on the shell 1, the bottom of the touch rod 9 is positioned at the tail end of a rotating path of the ejector block 8, the ejector block 8 rotates under the driving of the swinging plate 2 until the driving wheel 4 is meshed with the turning wheel 3, the ejector block 8 moves to be in contact with the bottom of the touch rod 9 and pushes the touch rod 9 to move upwards, when the turning wheel 3 and the driving wheel 4 are pushed to move upwards under the action of the rotating speed difference of the turning wheel 3 and the driving wheel 4, the ejector block 8 rotates to be separated from the touch rod 9, and the touch rod 9 automatically resets downwards, the telescopic rod 10 is arranged in the shell 1, the telescopic rod 10 can adopt an electric push rod or an air cylinder structure, the movable end at the bottom of the telescopic rod 10 is in contact with the oscillating plate 2, the oscillating plate 2 can be pushed to rotate when the telescopic rod 10 is in telescopic operation, the contact rod 9 is provided with a movable contact 11, the shell 1 is provided with a stationary contact 12, the movable contact 11 and the stationary contact 12 are both electrically connected with the telescopic rod 10, thus when the contact rod 9 is pushed to move upwards by the top block 8 in the process of the barring operation, the movable contact 11 is separated from the stationary contact 12, at the moment, the telescopic rod 10 does not perform telescopic operation, once the barring finishes the separation of the top block 8 and the contact rod 9, the movable contact 11 is in contact with the stationary contact 12 after the contact rod 9 is reset downwards to extend the telescopic rod 10 and push the oscillating plate 2 to rotate, so that the positioning groove 6 accurately moves to the position of the positioning rod 7 to realize the matching of the two to fix the oscillating plate 2, the telescopic link 10 automatic retraction resets this moment, makes preparation for next barring, makes constant head tank 6 can move and targets in place, realizes that the barring structure in time separates with the rotor, does not need manual intervention, and the separation operation is more accurate convenient, reduces the impact to barring structure gear, guarantees its life.

Preferably, a sliding sleeve 13 is arranged on the housing 1, the sliding sleeve 13 is of a hollow structure, the feeler lever 9 is slidably connected inside the sliding sleeve 13, a compression spring 14 is arranged between the top of the feeler lever 9 and the top of the sliding sleeve 13, the movable contact 11 and the fixed contact 12 are in a contact state under the action of the compression spring 14, the movable contact 11 is located above the fixed contact 12, the movable contact 11 moves upwards to be separated from the fixed contact 12 when the feeler lever 9 is pushed to slide upwards by the ejector block 8, and the movable contact 11 is driven to move downwards to be in contact with the fixed contact 12 under the action of the compression spring 14 after the ejector block 8 is separated from the feeler lever 9, so that the cooperation between the movable contact and the fixed contact is smoother and in place, the case jamming condition caused when the feeler lever 9 is reset by self gravity is reduced, and the smoothness of the operation of the device is improved.

Preferably, the movable ends of the bottoms of the top block 8 and the telescopic rod 10 are respectively provided with a rotating wheel 15, the rotating wheels 15 are rotatably connected through bearings, and when the top block 8 is in contact with the contact rod 9 and the telescopic rod 10 is in contact with the swinging plate 2 through the operation, a good contact effect can be kept when the relative rotation occurs between the top block 8 and the swinging plate, the rotation and the sliding of the top block are more smooth, and the abrasion of the contact position is avoided.

Preferably, the rotating position of the swing plate 2 and the rotating position of the shell 1 are located between the middle part and the end part of the swing plate 2, so that the rotating position of the swing plate 2 forms an eccentric structure, after the positioning rod 7 is separated from the positioning groove 6, the swing plate 2 is driven to rotate under the action of the torsion spring 5, the eccentric structure of the swing plate 2 can be further utilized to rotate, the engagement of the driving wheel 4 and the turning wheel 3 is further ensured to be in place, and the stability and firmness of turning operation are ensured.

Preferably, the end part of the positioning rod 7 is provided with a roller 16, the roller 16 is connected in the positioning groove 6 in a rolling manner, and the positioning rod 7 is driven to enter or exit from the positioning groove 6 by using a driving structure, so that the positioning rod and the positioning groove are more smoothly matched, and the fault-tolerant rate of the positioning operation is higher.

The working principle is as follows: the utility model discloses rotate in the inside of casing 1 and set up swing board 2, the one end of swing board 2 sets up kicking block 8, the inside slip of casing 1 sets up feeler lever 9, drive wheel 4 on swing board 2 meshes with the dish wheel 3 on the rotor and carries out the barring operation after swing board 2 rotates, kicking block 8 contacts with the bottom of feeler lever 9 at this moment and promotes its movable contact 11 and stationary contact 12 separation, after the barring is accomplished, because the difference dish wheel 3 of rotational speed promotes drive wheel 4 and moves upward, make kicking block 8 and feeler lever 9 separate, movable contact 11 and stationary contact 12 contact, control telescopic link 10 and extend the operation, the bottom expansion end of telescopic link 10 promotes swing board 2 and rotates, make constant head tank 6 rotate to swing board 2 after the position cooperation of locating lever 7, make constant head tank 6 can accurately move to the position of locating lever 7, guarantee the promptness that swing board 2 breaks away from, the manual separation is not needed, the use is more convenient, the impact force on the driving wheel 4 for a long time is avoided, and the service life of the barring gear structure is prolonged; set up torsional spring 5 between swing plate 2 and casing 1, the locating lever 7 makes swing plate 2 automatic swing realize drive wheel 4 and the meshing of barring wheel 3 under torsional spring 5's effect after breaking away from with constant head tank 6, do not need manual control, it is more convenient to make the barring operation, swing plate 2 rotates the automatic rotation of in-process drive kicking block 8, make kicking block 8 and feeler lever 9's bottom contact realize the autosegregation of movable contact 11 and stationary contact 12, automatic control is realized in the linkage of whole device, the operation is more smooth, manual operation's step has been reduced, barring efficiency is higher.

Claims (5)

1. The utility model provides an electric barring mechanism for steam turbine, includes casing (1), casing (1) internal rotation is connected with wobble plate (2), be equipped with on wobble plate (2) with driving wheel (4) of dish wheel (3) meshing, its characterized in that: be equipped with torsional spring (5) between casing (1) and swing board (2), the one end of swing board (2) is equipped with constant head tank (6), sliding connection has locating lever (7) that cooperation constant head tank (6) used on casing (1), the other end of swing board (2) is equipped with kicking block (8), sliding connection has feeler lever (9) on casing (1), the bottom of feeler lever (9) is located kicking block (8) and rotates the end of route, be equipped with telescopic link (10) in casing (1), the bottom expansion end of telescopic link (10) contacts with swing board (2), be equipped with movable contact (11) on feeler lever (9), be equipped with stationary contact (12) on casing (1), movable contact (11), stationary contact (12) all are connected with telescopic link (10) electricity.

2. The electric jigger mechanism for steam turbines as claimed in claim 1, wherein: be equipped with sliding sleeve (13) on casing (1), feeler lever (9) sliding connection is in the inside of sliding sleeve (13), be equipped with compression spring (14) between the top of feeler lever (9) and the top of sliding sleeve (13), movable contact (11) are located the top of stationary contact (12).

3. The electric jigger mechanism for steam turbines according to claim 2, wherein: the movable ends of the top block (8) and the bottom of the telescopic rod (10) are provided with rotating wheels (15).

4. The electric jigger mechanism for steam turbines as claimed in claim 1, wherein: the rotation positions of the swing plate (2) and the shell (1) are positioned between the middle part and the end part of the swing plate (2).

5. The electric jigger mechanism for steam turbines as claimed in claim 4, wherein: the end part of the positioning rod (7) is provided with a roller (16), and the roller (16) is connected in the positioning groove (6) in a rolling manner.

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