CN112253268A

CN112253268A - Anti-collision automatic barring device for steam turbine

Info

Publication number: CN112253268A
Application number: CN202011187337.XA
Authority: CN
Inventors: 刘保崖
Original assignee: Fuzhou Taijiang Aiqishi Electronic Technology Co ltd
Current assignee: Fuzhou Taijiang Aiqishi Electronic Technology Co ltd
Priority date: 2020-10-30
Filing date: 2020-10-30
Publication date: 2021-01-22

Abstract

The invention relates to the related field of steam turbines, and discloses an anti-collision automatic barring device for a steam turbine, which comprises a main box body, wherein a moving block cavity is arranged in the main box body, a rotating belt wheel cavity is communicated and arranged on the upper end wall of the rotating belt wheel cavity, a worm shaft through cavity with an upward opening is communicated and arranged on the upper end wall of the rotating belt wheel cavity, a moving box body is arranged on the upper side of the main box body, a worm and gear cavity is arranged in the moving box body, the meshing condition of a contact gear on a rotor shaft of the steam turbine and a meshing gear of the barring device is identified through an induction mechanism, the meshing position of the gears is changed to prevent a gear tooth convex surface from directly colliding with the meshing gear, the condition that certain loss is caused by rigid collision of the two gears is avoided, the service life of the barring device is prolonged, meanwhile, the automatic barring of the rotor shaft due.

Description

Anti-collision automatic barring device for steam turbine

Technical Field

The invention relates to the related field of steam turbines, in particular to an anti-collision automatic barring device for a steam turbine.

Background

Before the turboset starts and need keep low-speed running state after shutting down to avoid the cylinder upper and lower cylinder difference in temperature to cause the rotor to be crooked, low-speed running state is realized by the drive of barring gear, current barring gear generally judges the rotational speed and meshes the gear by the workman, because the barring gear does not have buffer during direct engagement, can cause the rigidity collision if the direct meshing of teeth of a cogwheel convex surface, can all cause certain damage to steam turbine and barring gear, in addition, the manual work is difficult to grasp when carrying out the barring, influence gear engagement effect.

Disclosure of Invention

The invention aims to provide an anti-collision automatic barring device for a steam turbine, which can overcome the defects in the prior art, so that the practicability of equipment is improved.

The technical scheme adopted by the invention for solving the technical problems is as follows: the invention discloses an anti-collision automatic barring device for a steam turbine, which comprises a main box body, wherein a moving block cavity is arranged in the main box body, a rotating belt wheel cavity is communicated and arranged on the upper end wall of the rotating belt wheel cavity, a worm shaft through cavity with an upward opening is communicated and arranged on the upper end wall of the main box body, a moving box body is arranged on the upper side of the main box body, a worm gear cavity is arranged in the moving box body, a meshing gear cavity with a leftward opening is arranged on the left side of the worm gear cavity, a driving belt wheel cavity is arranged on the front side of the worm gear cavity, a screw shaft gear cavity is arranged on the right side of the moving block cavity, a sleeve cavity is communicated and arranged on the lower end wall of the screw shaft gear cavity, a driving shaft bevel gear cavity is arranged on the right side of the sleeve cavity, a driven shaft bevel gear cavity is communicated and arranged on the upper end wall of the driving shaft bevel gear cavity, a moving screw rod which extends into the, the movable lead screw is connected with a movable block in a threaded fit manner, the movable block is connected with the movable block cavity in a sliding fit manner, the upper end face of the movable block is connected with a worm shaft which penetrates through the rotating belt wheel cavity and the worm shaft through cavity upwards and extends into the worm wheel and worm shaft cavity upwards in a rotating fit manner, the worm shaft is fixedly connected with a worm positioned in the worm wheel and worm shaft cavity, the front end wall of the worm wheel and worm shaft cavity is connected with a worm wheel shaft which extends backwards into the worm wheel and worm shaft cavity and extends forwards into the transmission belt wheel cavity in a rotating fit manner, the worm wheel shaft is fixedly connected with a worm wheel positioned in the worm wheel and worm shaft, the worm wheel is meshed with the worm, the worm wheel shaft is also fixedly connected with a first belt wheel positioned in the transmission belt wheel cavity, and the rear end wall of the transmission belt wheel cavity is connected with a meshed gear shaft which extends forwards into the transmission, the meshing gear shaft is fixedly connected with a second belt wheel positioned in the cavity of the transmission belt wheel, and the meshing gear shaft is also fixedly connected with a meshing gear positioned in the cavity of the meshing gear.

On the basis of the technical scheme, a motor positioned on the right side of the driving shaft bevel gear cavity is arranged in the main box body, the left end surface of the motor is fixedly connected with a driving shaft which penetrates through the driving shaft bevel gear cavity leftwards and extends leftwards into the sleeve cavity, the driving shaft is fixedly connected with a driving shaft bevel gear positioned in the driving shaft bevel gear cavity, the driving shaft is connected with a sleeve positioned in the sleeve cavity in a spline fit manner, a sleeve inner cavity with a right opening is arranged in the sleeve, a sleeve gear is fixedly connected on the sleeve, a screw shaft gear positioned in the screw shaft gear cavity is fixedly connected to the movable screw, the screw shaft gear is meshed with the sleeve gear, the sleeve is characterized in that the left end face of the sleeve is connected with a sleeve disc in a rotating fit mode, and a sleeve disc spring is fixedly connected between the left end face of the sleeve disc and the left end wall of the sleeve cavity.

On the basis of the technical scheme, the upper end wall of the driven shaft bevel gear cavity is connected with a driven shaft which extends downwards into the driven shaft bevel gear cavity and extends upwards into the rotating belt wheel cavity in a rotating matching way, the driven shaft is fixedly connected with a driven shaft bevel gear positioned in the driven shaft bevel gear cavity, the driven shaft bevel gear is meshed with the driving shaft bevel gear, the driven shaft is also fixedly connected with a third belt wheel positioned in the rotating belt wheel cavity, the lower end wall of the rotating belt wheel cavity is connected with a belt wheel auxiliary shaft which extends upwards into the rotating belt wheel cavity in a rotating matching way, the belt wheel auxiliary shaft is fixedly connected with a fourth belt wheel positioned in the rotating belt wheel cavity, the worm shaft is fixedly connected with a fifth belt wheel positioned in the rotating belt wheel cavity, and a rotary conveying belt is connected among the fifth belt wheel, the fourth belt wheel and the third belt wheel in a power fit manner.

On the basis of the technical scheme, a limiting block cavity positioned at the rear side of the driving pulley cavity is arranged in the main box body, a limiting block is connected in the limiting block cavity in a sliding fit manner, a limiting block spring is fixedly connected between the right end face of the limiting block and the right end wall of the limiting block cavity, a middle through cavity is communicated and arranged between the front end wall of the limiting block cavity and the rear end wall of the driving pulley cavity, a friction pulley through cavity with a forward opening is communicated and arranged on the front end wall of the driving pulley cavity, a friction pulley shaft which penetrates through the middle through cavity, the driving pulley cavity and the friction pulley through cavity forwards and extends to the outside is connected on the front end face of the limiting block in a rotating fit manner, a sixth pulley positioned in the driving pulley cavity is fixedly connected on the friction pulley shaft, and a conveying belt is connected among the sixth pulley, the second, the friction wheel shaft is fixedly connected with a friction wheel positioned outside, a centrifugal block cavity positioned on the right side of the friction wheel shaft is arranged in the friction wheel, a centrifugal block is connected in the centrifugal block cavity in a sliding fit mode, a centrifugal block spring is fixedly connected between the left end face of the centrifugal block and the left end wall of the centrifugal block cavity, and a contact switch positioned on the right side of the centrifugal block is fixedly connected to the right end wall of the centrifugal block cavity.

On the basis of the technical scheme, a rotor shaft is arranged on the right side of the movable box body, a rotor shaft friction wheel positioned outside is fixedly connected to the rotor shaft, the rotor shaft friction wheel is meshed with the friction wheel, an induction rod cavity which is positioned on the rear side of the meshed gear cavity and has a leftward opening is arranged in the movable box body, an induction rod extending to the outside is connected in the induction rod cavity in a sliding fit manner, an induction block is fixedly connected to the left end face of the induction rod, an induction rod spring is fixedly connected between the right end face of the induction rod and the right end wall of the induction rod cavity, a metal plate cavity positioned on the rear side of the rotating belt wheel cavity is arranged in the main box body, a trigger metal plate is connected in the metal plate cavity in a sliding fit manner, a metal plate spring is fixedly connected between the lower end face of the trigger metal plate and the lower end wall of the metal plate cavity, and a metal plate pull, the other end of the metal plate pull rope is fixedly connected with the left end face of the sleeve disc.

On the basis of the technical scheme, a magnetic slider cavity positioned at the upper side of the metal plate cavity is arranged in the movable box body, a magnetic slider is connected in the magnetic slider cavity in a sliding fit manner, a magnetic slider spring is fixedly connected between the front end surface of the magnetic slider and the front end wall of the magnetic slider cavity, a magnetic slider pull rope is also fixedly connected on the front end surface of the magnetic slider spring, the other end of the magnetic slider pull rope is fixedly connected with the right end surface of the induction rod, the lower end wall of the magnetic slider cavity is communicated with a magnetic through cavity with a downward opening and corresponding to the metal plate cavity, limiting slider cavities positioned at the outer side of the rotating pulley cavity are symmetrically arranged in the main box body from left to right, limiting sliders are connected in the limiting slider cavities in a sliding fit manner, a connecting block cavity with an upward opening is communicated with the upper end wall of the limiting slider cavities, and a connecting block with, the upper end face of the connecting block is fixedly connected with the lower end face of the movable box body, and the lower end face of the connecting block is fixedly connected with the upper end face of the limiting slide block.

The invention has the beneficial effects that: the meshing condition of the contact gear and the meshing gear of the turning gear on the steam turbine rotor shaft is identified through the sensing mechanism, the meshing position of the gear is changed to prevent the gear teeth from directly colliding with the meshing gear, the condition that certain loss is caused by rigid collision of the two gears is avoided, the service life of the turning gear is prolonged, meanwhile, the steam turbine is stopped and the rotor shaft is automatically turned by starting, the traditional manual turning is replaced, and the working efficiency of operating personnel is improved.

Drawings

In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.

The invention is further illustrated with reference to the following figures and examples.

Fig. 1 is a schematic view of the overall structure of an anti-collision automatic barring device for a steam turbine according to the present invention.

Fig. 2 is a schematic sectional view of a-a in fig. 1.

FIG. 3 is a schematic cross-sectional view of B-B in FIG. 1.

Fig. 4 is a schematic sectional structure view of C-C in fig. 3.

Fig. 5 is an enlarged schematic view of the structure at D in fig. 1.

Detailed Description

The invention will now be described in detail with reference to fig. 1-5, wherein for ease of description the orientations described hereinafter are now defined as follows: the up, down, left, right, and front-back directions described below correspond to the up, down, left, right, and front-back directions in the projection relationship of fig. 1 itself.

With reference to fig. 1-5, the anti-collision automatic barring device for the steam turbine comprises a main box body 10, a moving block cavity 12 is arranged in the main box body 10, a rotating pulley cavity 14 is arranged in the upper end wall in a communicating manner, a worm shaft through cavity 79 with an upward opening is arranged in the upper end wall in the rotating pulley cavity 14 in a communicating manner, a moving box body 80 is arranged on the upper side of the main box body 10, a worm gear cavity 23 is arranged in the moving box body 80, a meshing gear cavity 20 with a leftward opening is arranged on the left side of the worm gear cavity 23, a driving pulley cavity 28 is arranged on the front side of the worm gear cavity 23, a screw shaft gear cavity 73 is arranged on the right side of the moving block cavity 12, a sleeve cavity 66 is arranged in the communicating manner on the lower end wall of the screw shaft gear cavity 73, a driving shaft bevel gear cavity 64 is arranged on the right side of the sleeve cavity 66, a driven shaft bevel gear cavity 76 is arranged in the communicating manner on the upper end wall of the driving shaft bevel gear cavity 64, and the left end wall of the screw shaft A moving lead screw 13 penetrating through the moving block cavity 12, a moving block 11 connected to the moving lead screw 13 in a threaded fit manner, the moving block 11 and the moving block cavity 12 in a sliding fit manner, a worm shaft 25 upwardly penetrating through the rotating pulley cavity 14 and the worm shaft through cavity 79 and upwardly extending into the worm and gear cavity 23 is connected to the upper end surface of the moving block 11 in a rotating fit manner, a worm 24 located in the worm and gear cavity 23 is fixedly connected to the worm shaft 25, a worm wheel shaft 22 rearwardly extending into the worm and gear cavity 23 and forwardly extending into the driving pulley cavity 28 is connected to the front end wall of the worm and gear cavity 23 in a rotating fit manner, a worm wheel 21 located in the worm and gear cavity 23 is fixedly connected to the worm wheel shaft 22, the worm wheel 21 is meshed with the worm 24, a first belt wheel 29 located in the driving pulley cavity 28 is further fixedly connected to the worm wheel shaft 22, the rear end wall of the driving pulley cavity 28 is connected with a meshing gear shaft 19 which extends forwards into the driving pulley cavity 28 and extends backwards into the meshing gear cavity 20, the meshing gear shaft 19 is fixedly connected with a second belt pulley 38 which is positioned in the driving pulley cavity 28, and the meshing gear shaft 19 is also fixedly connected with a meshing gear 18 which is positioned in the meshing gear cavity 20.

In addition, in one embodiment, a motor 78 is provided in the main housing 10 to the right of the drive shaft bevel cavity 64, the left end face of the motor 78 is fixedly connected with a driving shaft 77 which penetrates through the driving shaft bevel gear cavity 64 leftwards and extends leftwards into the sleeve cavity 66, a driving shaft bevel gear 65 positioned in the driving shaft bevel gear cavity 64 is fixedly connected to the driving shaft 77, a sleeve 68 located within the sleeve cavity 66 is splined to the drive shaft 77, a sleeve inner cavity 71 with a right opening is arranged in the sleeve 68, a sleeve gear 67 is fixedly connected to the sleeve 68, a screw shaft gear 72 positioned in the screw shaft gear cavity 73 is fixedly connected to the movable screw 13, the screw shaft gear 72 is meshed with the sleeve gear 67, the sleeve disc 69 is connected to the left end face of the sleeve 68 in a rotating fit manner, a sleeve disc spring 70 is fixedly connected between the left end surface of the sleeve disc 69 and the left end wall of the sleeve cavity 66.

In addition, in one embodiment, the driven shaft 74 extending downward into the driven shaft bevel cavity 76 and extending upward into the rotating pulley cavity 14 is connected to the upper end wall of the driven shaft bevel cavity 76 in a rotating manner, the driven shaft 74 is fixedly connected with the driven shaft bevel gear 75 located in the driven shaft bevel cavity 76, the driven shaft bevel gear 75 is engaged with the driving shaft bevel gear 65, the driven shaft 74 is further fixedly connected with the third pulley 27 located in the rotating pulley cavity 14, the lower end wall of the rotating pulley cavity 14 is connected with the pulley countershaft 16 extending upward into the rotating pulley cavity 14 in a rotating manner, the pulley countershaft 16 is fixedly connected with the fourth pulley 17 located in the rotating pulley cavity 14, the worm shaft 25 is fixedly connected with the fifth pulley 26 located in the rotating pulley cavity 14, the fifth pulley 26, A rotating transmission belt 15 is connected between the fourth belt pulley 17 and the third belt pulley 27 in a power fit manner.

In addition, in one embodiment, a stopper cavity 49 located at the rear side of the driving pulley cavity 28 is arranged in the main box body 10, a stopper 46 is connected in the stopper cavity 49 in a sliding fit manner, a stopper spring 48 is fixedly connected between the right end face of the stopper 46 and the right end wall of the stopper cavity 49, an intermediate through cavity 50 is arranged between the front end wall of the stopper cavity 49 and the rear end wall of the driving pulley cavity 28 in a communicating manner, a friction pulley through cavity 30 with a forward opening is arranged in the front end wall of the driving pulley cavity 28 in a communicating manner, a friction pulley 36 which penetrates through the intermediate through cavity 50, the driving pulley cavity 28 and the friction pulley through cavity 30 forwards and extends to the outside is connected in a rotating fit manner on the front end face of the stopper 46, a sixth pulley 47 located in the driving pulley cavity 28 is fixedly connected on the friction pulley 36, and a conveying belt 35 is connected among the sixth pulley 47, the second pulley 38 and the first pulley 29 in a, the friction wheel shaft 36 is fixedly connected with a friction wheel 37 located outside, a centrifugal block cavity 32 located on the right side of the friction wheel shaft 36 is arranged in the friction wheel 37, a centrifugal block 33 is connected in the centrifugal block cavity 32 in a sliding fit mode, a centrifugal block spring 34 is fixedly connected between the left end face of the centrifugal block 33 and the left end wall of the centrifugal block cavity 32, and a contact switch 31 located on the right side of the centrifugal block 33 is fixedly connected to the right end wall of the centrifugal block cavity 32.

In addition, in one embodiment, a rotor shaft 41 is arranged on the right side of the moving box 80, a rotor shaft friction wheel 39 located outside is fixedly connected to the rotor shaft 41, the rotor shaft friction wheel 39 is engaged with the friction wheel 37, an induction rod cavity 40 which is located on the rear side of the engaged gear cavity 20 and has a leftward opening is arranged in the moving box 80, an induction rod 44 which extends to the outside to the left is connected in the induction rod cavity 40 in a sliding fit manner, an induction block 43 is fixedly connected to the left end surface of the induction rod 44, an induction rod spring 45 is fixedly connected between the right end surface of the induction rod 44 and the right end wall of the induction rod cavity 40, a metal plate cavity 60 located on the rear side of the rotating pulley cavity 14 is arranged in the main box 10, a trigger metal plate 61 is connected in the metal plate cavity 60 in a sliding fit manner, and a metal plate spring 63 is fixedly connected between the lower end surface of the trigger metal plate 61 and the lower, the lower end face of the trigger metal plate 61 is also fixedly connected with a metal plate pull rope 62, and the other end of the metal plate pull rope 62 is fixedly connected with the left end face of the sleeve disc 69.

In addition, in one embodiment, a magnetic slider cavity 53 located on the upper side of the metal plate cavity 60 is arranged in the movable box 80, a magnetic slider 52 is connected in the magnetic slider cavity 53 in a sliding fit manner, a magnetic slider spring 54 is fixedly connected between the front end surface of the magnetic slider 52 and the front end wall of the magnetic slider cavity 53, a magnetic slider pull rope 55 is further fixedly connected to the front end surface of the magnetic slider spring 54, the other end of the magnetic slider pull rope 55 is fixedly connected to the right end surface of the induction rod 44, a magnetic through cavity 51 with a downward opening and corresponding to the metal plate cavity 60 is communicated with the lower end wall of the magnetic slider cavity 53, limiting slider cavities 58 located on the outer side of the rotating pulley cavity 14 are symmetrically arranged in the main box 10 in the left-right direction, limiting sliders 59 are connected in the limiting slider cavities 58 in a sliding fit manner, and connecting block cavities 57 with an upward opening are communicated with the upper end walls of the, the connecting block cavity 57 is connected with a connecting block 56 with a part located outside in a sliding fit mode, the upper end face of the connecting block 56 is fixedly connected with the lower end face of the movable box body 80, and the lower end face of the connecting block 56 is fixedly connected with the upper end face of the limiting sliding block 59.

The fixing and connecting method in this embodiment includes, but is not limited to, bolting, welding, and the like.

As shown in fig. 1-5, when the apparatus of the present invention is in an initial state, the moving block 11 is located at the rightmost end of the stroke, the moving box 80 is also located at the rightmost end of the stroke, the sensing rod 44 is partially located outside, the magnetic slider spring 54 is located at the right side of the magnetic slider cavity 53, the elasticity of the sensing rod spring 45 is greater than that of the magnetic slider spring 54, the sensing rod spring 45 is in a stretched state, the magnetic slider spring 54 is in a compressed state, the magnetic slider pull rope 55 is in a tightened state, the metal plate spring 63 and the sleeve disk spring 70 are in a relaxed state, the metal plate pull rope 62 is in a tightened state, the sleeve gear 67 is engaged with the screw shaft gear 72, the stopper spring 48 and the centrifugal block spring 34 are in a relaxed state, and the friction wheel 37 is; sequence of mechanical actions of the whole device: when the steam turbine starts to work, when the steam turbine stops rotating, the rotating speed of the rotor shaft 41 gradually decreases, the rotor shaft 41 rotates to drive the friction wheel 37 to rotate through the rotor shaft friction wheel 39, the centrifugal block 33 outwards moves against the pulling force of the centrifugal block spring 34 under the action of centrifugal force to touch the contact switch 31, the contact switch 31 controls the motor 78 to start so as to drive the driving shaft 77 to rotate, the driving shaft 77 rotates to drive the sleeve 68 to rotate, the sleeve 68 rotates to drive the movable screw 13 to rotate through the sleeve gear 67 and the screw shaft gear 72, the movable screw 13 rotates to drive the movable block 11 to move leftwards so as to drive the movable box 80 to move leftwards, the driving shaft 77 rotates to simultaneously drive the driven shaft 74 to rotate through the driving shaft bevel gear 65 and the driven shaft bevel gear 75, the driven shaft 74 rotates to drive the fifth pulley 26 and the fourth pulley 17 through the third pulley 27 and the rotating transmission belt 15, the, the worm shaft 25 rotates to drive the worm wheel shaft 22 to rotate through the worm 24 and the worm wheel 21, the worm wheel shaft 22 rotates to drive the sixth belt wheel 47 and the second belt wheel 38 to rotate through the first belt wheel 29 and the conveyor belt 35, the second belt wheel 38 rotates to drive the meshing gear shaft 19 to rotate so as to drive the meshing gear 18 to rotate, the sixth belt wheel 47 rotates to drive the friction wheel shaft 36 to rotate so as to drive the friction wheel 37 to rotate, when the contact gear tooth convex surface of the rotor shaft 41 is opposite to the induction block 43, the induction block 43 moves rightwards under the thrust action of the contact gear tooth convex surface against the thrust of the induction rod spring 45, the magnetic slide block pull rope 55 is loosened, the magnetic slide block 52 moves backwards under the thrust of the magnetic slide block spring 54 to the upper side of the magnetic through cavity 51, the trigger metal plate 61 moves upwards under the magnetic attraction of the magnetic slide block 52 against the tension of the metal plate spring 63 and pulls the metal plate pull rope 62, the sleeve disc 69 moves, the sleeve gear 67 is disengaged from the screw shaft gear 72, the movable box 80 stops moving, the contact gear still rotates at the moment, the gear tooth groove part is opposite to the induction block 43 after rotating for a certain angle, the induction block 43 loses the action of convex thrust and moves leftwards under the action of the thrust of the induction rod spring 45 and pulls the magnetic slide block pull rope 55, the magnetic slide block 52 moves forwards and resets under the action of the tension of the magnetic slide block pull rope 55 and overcomes the thrust of the magnetic slide block spring 54, the metal plate 61 is triggered to move downwards and reset under the action of the tension of the metal plate spring 63, the sleeve disc 69 moves rightwards and resets under the action of the thrust of the sleeve disc spring 70, the sleeve gear 67 is re-engaged with the screw shaft gear 72, the movable box 80 continuously moves leftwards so that the engagement gear 18 is accurately engaged with the gear tooth groove part of the contact gear on the rotor shaft 41, and the contact gear convex tooth on, direct engagement occurs if the contacting gear tooth groove portion on the rotor shaft 41 directly faces the meshing gear 18.

Before the steam turbine is started, a turning gear is needed, in this case, the initial state of the rotor shaft 41 is a stopped state, the motor 78 is directly started, the movable box 80 moves leftwards, the friction wheel 37 firstly starts to abut against the rotor shaft friction wheel 39, the limiting block 46 overcomes the thrust action of the limiting block spring 48 under the thrust action of the friction wheel 37 and moves rightwards, when the contact gear tooth convex surface on the rotor shaft 41 is opposite to the sensing block 43, the movable box 80 stops moving, the friction wheel shaft 36 rotates to drive the rotor shaft 41 to rotate through the friction wheel 37 and the rotor shaft friction wheel 39, so that the contact gear tooth groove part on the rotor shaft 41 is opposite to the sensing block 43, and the movable box 80 continuously moves leftwards, so that the meshing gear 18 is accurately meshed with the contact gear tooth groove part on the rotor shaft 41.

The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.

Claims

1. The utility model provides an automatic barring gear of anticollision for steam turbine, includes the main tank body, its characterized in that: a moving block cavity is arranged in the main box body, a rotating belt wheel cavity is communicated with and arranged on the upper end wall of the rotating belt wheel cavity, a worm shaft through cavity with an upward opening is communicated with and arranged on the upper end wall of the main box body, a moving box body is arranged on the upper side of the main box body, a worm gear cavity is arranged in the moving box body, a meshing gear cavity with a leftward opening is arranged on the left side of the worm gear cavity, a driving belt wheel cavity is arranged on the front side of the worm gear cavity, a screw shaft gear cavity is arranged on the right side of the moving block cavity, a sleeve cavity is communicated with and arranged on the lower end wall of the screw shaft gear cavity, a driving shaft bevel cavity is arranged on the right side of the sleeve cavity, a driven shaft bevel cavity is communicated with and arranged on the upper end wall of the driving shaft bevel cavity, a moving lead screw which extends into the screw shaft gear cavity rightwards and penetrates through the moving block cavity left, the moving block is connected with the moving block cavity in a sliding fit manner, the upper end face of the moving block is connected with a worm shaft which penetrates through the rotating belt wheel cavity and the worm shaft through cavity upwards and extends into the worm wheel and worm cavity upwards in a rotating fit manner, the worm shaft is fixedly connected with a worm positioned in the worm wheel and worm cavity, the front end wall of the worm wheel and worm cavity is connected with a worm wheel shaft which extends backwards into the worm wheel and worm cavity and extends forwards into the transmission belt wheel cavity in a rotating fit manner, the worm wheel shaft is fixedly connected with a worm wheel positioned in the worm wheel and worm cavity, the worm wheel is meshed with the worm, the worm wheel shaft is also fixedly connected with a first belt wheel positioned in the transmission belt wheel cavity, and the rear end wall of the transmission belt wheel cavity is connected with a meshing gear shaft which extends forwards into the transmission belt wheel cavity and backwards into the meshing gear cavity in, the meshing gear shaft is fixedly connected with a second belt wheel positioned in the cavity of the transmission belt wheel, and the meshing gear shaft is also fixedly connected with a meshing gear positioned in the cavity of the meshing gear.

2. The anti-collision automatic barring device for the steam turbine according to claim 1, wherein: the movable screw rod type clutch is characterized in that a motor located on the right side of the driving shaft bevel gear cavity is arranged in the main box body, the left end face of the motor is fixedly connected with a driving shaft which penetrates through the driving shaft bevel gear cavity leftwards and extends to the interior of the sleeve cavity leftwards, a driving shaft bevel gear located in the driving shaft bevel gear cavity is fixedly connected onto the driving shaft, a sleeve located in the sleeve cavity is connected onto the driving shaft in a spline fit mode, a sleeve cavity with a right opening is arranged in the sleeve, a sleeve gear is fixedly connected onto the sleeve, a screw rod shaft gear located in the screw rod shaft gear cavity is fixedly connected onto the movable screw rod, the screw rod shaft gear is meshed with the sleeve gear, the left end face of the sleeve is connected with a sleeve disc in a rotating fit mode, and a sleeve disc spring is fixedly connected.

3. The anti-collision automatic barring device for the steam turbine according to claim 1, wherein: the upper end wall of the driven shaft bevel gear cavity is connected with a driven shaft which extends downwards into the driven shaft bevel gear cavity and extends upwards into the rotating belt wheel cavity in a matched manner, the driven shaft is fixedly connected with a driven shaft bevel gear which is positioned in the driven shaft bevel gear cavity, the driven shaft bevel gear is meshed with the driving shaft bevel gear, the driven shaft is further fixedly connected with a third belt wheel which is positioned in the rotating belt wheel cavity, the lower end wall of the rotating belt wheel cavity is connected with a belt wheel auxiliary shaft which extends upwards into the rotating belt wheel cavity in a matched manner, the belt wheel auxiliary shaft is fixedly connected with a fourth belt wheel which is positioned in the rotating belt wheel cavity, the worm shaft is fixedly connected with a fifth belt wheel which is positioned in the rotating belt wheel cavity, and a rotating conveying belt is connected between the fifth belt wheel, the fourth belt wheel and the third belt wheel in a matched.

4. The anti-collision automatic barring device for the steam turbine according to claim 1, wherein: a limiting block cavity positioned at the rear side of the driving pulley cavity is arranged in the main box body, a limiting block is connected in the limiting block cavity in a sliding fit manner, a limiting block spring is fixedly connected between the right end face of the limiting block and the right end wall of the limiting block cavity, a middle through cavity is communicated and arranged between the front end wall of the limiting block cavity and the rear end wall of the driving pulley cavity, a friction pulley through cavity with a forward opening is communicated and arranged on the front end wall of the driving pulley cavity, the front end face of the limiting block is connected with a friction pulley shaft which penetrates through the middle through cavity, the driving pulley cavity and the friction pulley through cavity forwards and extends to the outside in a rotating fit manner, a sixth belt pulley positioned in the driving pulley cavity is fixedly connected to the friction pulley shaft, a conveying belt is connected among the sixth belt pulley, the second belt pulley and the first belt pulley in a power fit manner, the friction wheel is internally provided with a centrifugal block cavity positioned on the right side of the friction wheel shaft, a centrifugal block is connected in the centrifugal block cavity in a sliding fit manner, a centrifugal block spring is fixedly connected between the left end face of the centrifugal block and the left end wall of the centrifugal block cavity, and the right end wall of the centrifugal block cavity is fixedly connected with a contact switch positioned on the right side of the centrifugal block.

5. The anti-collision automatic barring device for the steam turbine according to claim 1, wherein: the right side of the movable box body is provided with a rotor shaft, the rotor shaft is fixedly connected with a rotor shaft friction wheel positioned outside, the rotor shaft friction wheel is meshed with the friction wheel, a sensing rod cavity which is positioned at the rear side of the meshing gear cavity and has a leftward opening is arranged in the movable box body, the sensing rod cavity is connected with a sensing rod which extends to the outside leftwards in a sliding fit manner, a sensing block is fixedly connected with the left end surface of the sensing rod, a sensing rod spring is fixedly connected between the right end surface of the sensing rod and the right end wall of the sensing rod cavity, a metal plate cavity which is positioned at the rear side of the rotating pulley cavity is arranged in the main box body, a triggering metal plate is connected in the metal plate cavity in a sliding fit manner, a metal plate spring is fixedly connected between the lower end surface of the triggering metal plate and the lower end wall of the metal plate cavity, and a, the other end of the metal plate pull rope is fixedly connected with the left end face of the sleeve disc.

6. The anti-collision automatic barring device for the steam turbine according to claim 1, wherein: a magnetic slider cavity positioned at the upper side of the metal plate cavity is arranged in the movable box body, a magnetic slider is connected in the magnetic slider cavity in a sliding fit manner, a magnetic slider spring is fixedly connected between the front end face of the magnetic slider and the front end wall of the magnetic slider cavity, a magnetic slider pull rope is also fixedly connected at the front end face of the magnetic slider spring, the other end of the magnetic slider pull rope is fixedly connected with the right end face of the induction rod, the lower end wall of the magnetic slider cavity is communicated with a magnetic through cavity with a downward opening and corresponding to the metal plate cavity, limiting slider cavities positioned at the outer side of the rotating pulley cavity are symmetrically arranged in the main box body in a left-right manner, limiting sliders are connected in the limiting slider cavity in a sliding fit manner, a connecting block cavity with an upward opening is communicated with the upper end wall of the limiting slider cavity, and a part of, the upper end face of the connecting block is fixedly connected with the lower end face of the movable box body, and the lower end face of the connecting block is fixedly connected with the upper end face of the limiting slide block.