CN115450714A - Low-speed mechanical jigger for steam turbine maintenance - Google Patents

Abstract

The invention relates to a low-speed mechanical jigger, in particular to a low-speed mechanical jigger for maintaining a steam turbine. The invention aims to provide a low-speed mechanical jigger for maintaining a steam turbine, which can avoid damage of gears, is simple to operate and can avoid waste of lubricating oil. The invention provides a low-speed mechanical jigger for maintaining a steam turbine, which comprises a jigger device, a transmission mechanism, a lifting mechanism and a lubricating mechanism, wherein the jigger device is provided with the transmission mechanism for driving a rotor of the steam turbine to rotate, the jigger device is provided with the lifting mechanism for controlling the transmission mechanism to move up and down, and the jigger device is provided with the lubricating mechanism for lubricating the transmission mechanism. The electric transmission gear wheel takes the electric push rod as a driving force, can drive the transmission gear to move downwards, and can be accurately meshed with the turning gear wheel on the steam turbine under the buffering action of the first spring, so that the transmission gear wheel is prevented from being damaged, and the electric transmission gear wheel is simple in structure and convenient to operate.

Description

Low-speed mechanical jigger for steam turbine maintenance

Technical Field

The invention relates to a low-speed mechanical jigger, in particular to a low-speed mechanical jigger for maintaining a steam turbine.

Background

Before the steam turbine is started, rushed to rotate or stopped, the rotor needs to rotate for a period of time at a certain speed, the temperature field of the steam turbine rotor is kept to be symmetrically distributed along the circumference of the axis, and the rotor is prevented from being heated unevenly to generate bending or from being heated unevenly accidentally to generate thermal bending. The long-time continuous barring enables the thermal bending of the rotor to be corrected, and the barring device is a device capable of enabling the rotor to rotate at a low speed under the condition.

Present steam turbine barring device is by the motor basically, gear reducer and oscillating gear constitute, in operation, drive the reduction gear by the motor, the reduction gear drives oscillating gear, oscillating gear drives the driving gear again, slow down step by step in proper order, when throwing, promote oscillating gear and main shaft gear meshing by input mechanism, then actuating motor drives the rotor and rotates, but the gear of current barring device can not be once put into success, and the impact force is very big when throwing into, cause the damage of gear easily, and throw into, withdraw from the mechanism complicacy, the reliability is poor, the structure is heavy, simultaneously can get rid of lubricating oil at the rotation of lubricated in-process gear and fly and cause the waste.

In summary, there is a need for a low-speed mechanical turning gear for turbine maintenance, which can avoid gear damage, is easy to operate, and can avoid lubricant oil waste, and is used to solve the above problems.

Disclosure of Invention

The invention aims to overcome the defects that gears of the existing barring gear cannot be successfully put in one time, the impact force is large during putting in, the gears are easy to damage, the mechanism is complex, and lubricating oil is thrown away to cause waste.

The invention is realized by the following technical approaches:

the utility model provides a steam turbine is maintained and is used low-speed mechanical barring, is equipped with the rotor pivoted drive mechanism who is used for driving the steam turbine on the barring device, is equipped with the elevating system who is used for controlling drive mechanism and reciprocates on the barring device including barring device, drive mechanism, elevating system and lubricated mechanism that is used for lubricating drive mechanism on the barring device.

Preferably, the transmission mechanism comprises a sliding rail, a sliding block, a rotating shaft, a pinion, a bearing shaft, a transmission gear and first springs, the sliding rail is connected to the front side of the barring device, the sliding block is connected to the sliding rail in a sliding mode, the rotating shaft is connected to the sliding block in a rotating mode, the pinion is connected to the rear side of the rotating shaft, the pinion moves downwards to be meshed with a meshing gear of the barring device, the bearing shaft is connected to the front side of the rotating shaft, the transmission gear is connected to the bearing shaft in a rotating mode, and the four first springs are connected between the transmission gear and the bearing shaft.

Preferably, elevating system is connected with the front side of barring gear including electric putter and mount, and electric putter is located the top of slide rail, and electric putter's telescopic link is connected with the mount, and the axis of rotation is connected with the mount rotary type.

As preferred, lubricated mechanism is including the fender shell, the batch oil tank, drive assembly, the dwang, the oil feed valve, sponge post and play flitch, the front side of barring device is connected with the fender shell, the fender shell is located electric putter left side, the front side rotation type of barring device is connected with the dwang, be connected with the batch oil tank on the dwang, the batch oil tank is located the fender shell inboard, be connected with drive assembly between the meshing gear of dwang and barring device, the front side of batch oil tank is connected with the oil feed valve and communicates, the even interval in outside of batch oil tank is connected with a plurality of play flitchs and communicates, play flitch and drive gear contact, the one end that the play flitch kept away from each other all is connected with the sponge post.

Preferably, the turning gear protection device further comprises a protection mechanism for protecting the transmission gear, the protection mechanism comprises a guide frame, a sliding protection frame, a second spring, a connecting rod, a guide rod, a clamping rod and a third spring, the right side of the turning gear is connected with the guide frame, the sliding protection frame is connected to the guide frame in a sliding mode, the transmission gear is located on the inner side of the sliding protection frame, the two second springs are connected between the sliding protection frame and the guide frame, the lower portion of the fixing frame is connected with the connecting rod, the right side of the turning gear is connected with the two guide rods, the clamping rod is connected between the two guide rods in a sliding mode, the connecting rod is in contact with the clamping rod, and the third spring is connected between the left side of the clamping rod and the turning gear.

Preferably, the detection mechanism is used for detecting the rotating speed of a large turning gear on the steam turbine and comprises a rotating speed sensor and a control box, the rotating speed sensor is connected to the front side of the turning device and located below the blocking shell, the control box is connected to the front side of the turning device and located between the rotating speed sensor and the blocking shell, the rotating speed sensor is electrically connected with the control box, and the electric push rod is connected with the control box through a peripheral circuit.

Preferably, the plurality of discharging plates surround into a circle.

Preferably, the oil inlet valve is a one-way valve.

Compared with the prior art, the invention has the following advantages:

1. the electric transmission gear wheel takes the electric push rod as a driving force, can drive the transmission gear to move downwards, and can be accurately meshed with the turning gear wheel on the steam turbine under the buffering action of the first spring, so that the transmission gear wheel is prevented from being damaged, and the electric transmission gear wheel is simple in structure and convenient to operate.

2. According to the invention, through the rotation of the discharge plate and the sponge column, lubricating oil can be uniformly coated on the transmission gear, and the baffle shell can block the outer side of the discharge plate, so that the waste caused by the splashing of the lubricating oil is avoided.

3. The sliding protection frame can protect the transmission gear and prevent the transmission gear from being damaged when not used.

4. The rotating speed sensor can detect the rotating speed of the turning gear wheel on the steam turbine, and when the rotating speed of the turning gear wheel on the steam turbine reaches a preset value, the transmission gear can be automatically controlled to move upwards to be separated from the turning gear wheel on the steam turbine, manual control is not needed, and time and labor are saved.

Drawings

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

Fig. 2 is a schematic perspective view of the barring gear of the present invention.

Fig. 3 is a first exploded view of the transmission mechanism of the present invention.

Fig. 4 is a second exploded view of the transmission mechanism of the present invention.

Fig. 5 is a schematic perspective view of the lifting mechanism of the present invention.

Fig. 6 is a schematic perspective view of the lubricating mechanism of the present invention.

Fig. 7 is an exploded view of the lubricating mechanism of the present invention.

FIG. 8 is a schematic perspective view of the components of the fuel tank, the fuel inlet valve, the sponge column, etc. of the present invention.

Fig. 9 is a schematic perspective view of the protection mechanism of the present invention.

Fig. 10 is a schematic perspective view of components of the latch and the third spring according to the present invention.

Fig. 11 is a schematic perspective view of the detecting mechanism of the present invention.

Reference numerals: 1_ turning gear, 2_ transmission mechanism, 21_ sliding rail, 22_ sliding block, 23_ rotating shaft, 24_ pinion, 25_ bearing shaft, 26_ transmission gear, 27_ first spring, 3_ lifting mechanism, 31_ electric push rod, 32_ fixing frame, 4_ lubricating mechanism, 41_ blocking shell, 42_ oil storage tank, 43_ transmission component, 44_ rotating rod, 45_ oil inlet valve, 46_ sponge column, 47_ discharging plate, 5_ protection mechanism, 51_ guide frame, 52_ sliding protection frame, 53_ second spring, 54_ connecting rod, 55_ guide rod, 56_ clamping rod, 57_ third spring, 6_ detection mechanism, 61_ rotating speed sensor and 62_ control box.

Detailed Description

The following further describes the technical solution with reference to specific embodiments, and it should be noted that: the words upper, lower, left, right, and the like used herein to indicate orientation are merely for the location of the illustrated structure in the corresponding figures. The serial numbers of the parts are themselves numbered herein, for example: first, second, etc. are used only to distinguish the described objects, and do not have any sequential or technical meaning. The application states that: the connection and coupling, unless otherwise stated, include both direct and indirect connections (couplings).

Example 1

A low-speed mechanical jigger for turbine maintenance is disclosed, and comprises a jigger device 1, a transmission mechanism 2, a lifting mechanism 3 and a lubricating mechanism 4, wherein the transmission mechanism 2 is arranged on the jigger device 1, the lifting mechanism 3 is arranged on the jigger device 1, and the lubricating mechanism 4 is arranged on the jigger device 1, referring to fig. 1-8.

Referring to fig. 1, 3 and 4, the transmission mechanism 2 includes a slide rail 21, a slide block 22, a rotation shaft 23, a pinion 24, a bearing shaft 25, a transmission gear 26 and first springs 27, the slide rail 21 is bolted to the front side of the barring device 1, the slide block 22 is slidably connected to the slide rail 21, the rotation shaft 23 is rotatably connected to the slide block 22, the pinion 24 is connected to the rear side of the rotation shaft 23, the pinion 24 moves downward and is engaged with an engagement gear of the barring device 1, the bearing shaft 25 is connected to the front side of the rotation shaft 23, the transmission gear 26 is rotatably connected to the bearing shaft 25, when the barring device 1 operates, the pinion 24, the bearing shaft 25 and the transmission gear 26 can be driven to rotate, so as to drive the rotor of the barring device 1 to rotate, and four first springs 27 are connected between the transmission gear 26 and the bearing shaft 25.

Referring to fig. 1 and 5, the lifting mechanism 3 includes an electric push rod 31 and a fixing frame 32, the electric push rod 31 is bolted to the front side of the barring gear 1, the electric push rod 31 is located above the sliding rail 21, the fixing frame 32 is connected to a telescopic rod of the electric push rod 31, the rotating shaft 23 is rotatably connected to the fixing frame 32, and the electric push rod 31 is started to control the transmission gear 26 to move up and down.

Referring to fig. 1, 6, 7 and 8, the lubricating mechanism 4 includes a blocking shell 41, an oil storage tank 42, a transmission assembly 43, a rotating rod 44, an oil inlet valve 45, a sponge column 46 and a discharge plate 47, the blocking shell 41 is connected to the front side of the barring device 1, the blocking shell 41 is located on the left side of the electric push rod 31, the rotating rod 44 is rotatably connected to the front side of the barring device 1, the oil storage tank 42 is connected to the rotating rod 44, the oil storage tank 42 is located on the inner side of the blocking shell 41, the transmission assembly 43 is connected between the rotating rod 44 and the meshing gear of the barring device 1, the transmission assembly 43 is composed of two belt pulleys and a flat belt, the two belt pulleys are respectively installed on the rotating rod 44 and the meshing gear of the barring device 1, the flat belt is wound between the two belt pulleys, the oil inlet valve 45 is connected to the front side of the oil storage tank 42 and communicated with the oil inlet valve 45, the oil inlet valve 45 is a one-way valve, a plurality of discharge plates 47 are uniformly connected to the outer side of the oil storage tank 42 at intervals, the discharge plate 47 is contacted with the transmission gear 26, the plurality of discharge plates 47 are surrounded into a circle, one end of the discharge plate 47 is connected to the oil storage column 46, and the transmission gear of the sponge column can coat the lubricating oil on the sponge column 26.

When the mechanical barring is needed, the mechanical barring is firstly installed at a designated position, then a proper amount of lubricating oil is poured into the oil storage tank 42 through the oil inlet valve 45, the lubricating oil can soak the sponge column 46 through the discharging plate 47, then the barring device 1 is controlled to work, the meshing gear of the barring device 1 can drive the rotating rod 44 to rotate through the transmission assembly 43, so as to drive the oil storage tank 42, the sponge column 46 and the discharging plate 47 to rotate, the discharging plate 47 can drive the transmission gear 26 to rotate, at the moment, the sponge column 46 can be in contact with the transmission gear 26, so as to coat the lubricating oil on the transmission gear 26, the blocking shell 41 can prevent the lubricating oil from being thrown out, after the lubricating oil is coated on the transmission gear 26, the electric push rod 31 is started, the telescopic rod of the electric push rod 31 is controlled to extend, the fixing frame 32 is driven to move downwards, so as to drive the sliding block 22, the rotating shaft 23, the pinion 24, the bearing shaft 25 and the transmission gear 26 to move downwards, the sliding rail 21 plays a guiding role, so that the transmission gear 26 is separated from the discharging plate 47, the pinion 24 is meshed with a meshing gear of the barring gear 1, the transmission gear 26 is meshed with a barring gearwheel on the steam turbine, if the transmission gear 26 is not meshed with the barring gearwheel on the steam turbine, the transmission gear 26 is firstly contacted with the barring gearwheel on the steam turbine, at the moment, the transmission gear 26 stops moving downwards, the bearing shaft 25 continues to move downwards to drive the transmission gear 26 to move downwards, the transmission gear 26 is extruded by the barring gearwheel on the steam turbine to rotate, the first spring 27 is deformed to enable the transmission gear 26 to be meshed with the barring gearwheel on the steam turbine, then the telescopic rod of the electric push rod 31 is controlled to stop moving, at the moment, the meshing gear of the barring gear 1 drives the pinion 24 to rotate, thereby drive axis of rotation 23 and bearing axle 25 and rotate, first spring 27 reconversion, bearing axle 25 can drive gear 26 and rotate, drive gear 26 can drive the barring gear wheel rotation on the steam turbine, thereby drive the rotor rotation of steam turbine, thereby can make the rotor thermally equivalent or the cooling of steam turbine, avoid the rotor of steam turbine to take place the thermal bowing, and, drive gear 26 coats lubricating oil, can reduce the wearing and tearing of the barring gear wheel on the steam turbine, also can detect whether the rotor of steam turbine can normally rotate simultaneously, after the rotor of steam turbine reaches certain slew velocity, the telescopic link of control electric putter 31 shortens, drive mount 32 up-motion resets, thereby drive sliding block 22, axis of rotation 23, pinion 24, bearing axle 25 and drive gear 26 up-motion resets, make pinion 24 and the meshing gear separation of barring device 1, and drive gear 26 can separate with the barring gear wheel on the steam turbine, then close electric putter 31 can.

Example 2

On the basis of embodiment 1, referring to fig. 1, 9 and 10, the turning gear further includes a protection mechanism 5, the protection mechanism 5 includes a guide frame 51, a sliding protection frame 52, a second spring 53, a connecting rod 54, a guide rod 55, a clamping rod 56 and a third spring 57, the guide frame 51 is welded on the right side of the turning gear 1, the sliding protection frame 52 is connected on the guide frame 51 in a sliding manner, the transmission gear 26 is located inside the sliding protection frame 52, the sliding protection frame 52 can protect the transmission gear 26, two second springs 53 are connected between the sliding protection frame 52 and the guide frame 51, the connecting rod 54 is connected to the lower portion of the fixing frame 32, two guide rods 55 are welded on the right side of the turning gear 1, the clamping rod 56 is connected between the two guide rods 55 in a sliding manner, the connecting rod 54 is in contact with the clamping rod 56, and the third spring 57 is connected between the left side of the clamping rod 56 and the turning gear 1.

When the mechanical barring needs to be used, the sliding protection frame 52 is pushed forward, the second spring 53 is compressed, so that the sliding protection frame 52 does not block the outer side of the transmission gear 26 any more, when the fixing frame 32 moves downward, the transmission gear 26 and the connecting rod 54 are driven to move downward, so that the connecting rod 54 is separated from the blocking rod 56, the third spring 57 returns to the original state, the blocking rod 56 is driven to move rightward to block the sliding protection frame 52, when the fixing frame 32 moves upward to be reset, the transmission gear 26 and the connecting rod 54 are driven to move upward to be reset, when the connecting rod 54 contacts with the blocking rod 56, the blocking rod 56 is pressed to move leftward, the third spring 57 is compressed, so that the blocking rod 56 loosens the sliding protection frame 52, the second spring 53 returns to the original state, the sliding protection frame 52 is driven to move backward to reset, so that the sliding protection frame 52 blocks the outer side of the transmission gear 26 again, and the transmission gear 26 can be protected.

Referring to fig. 1 and 11, the turning gear device further includes a detection mechanism 6, the detection mechanism 6 includes a rotation speed sensor 61 and a control box 62, the rotation speed sensor 61 is bolted to the front side of the turning gear device 1, the rotation speed sensor 61 is located below the retaining shell 41, the rotation speed sensor 61 can detect the rotation speed of a turning gear wheel on a steam turbine, the control box 62 is connected to the front side of the turning gear device 1, the control box 62 is located between the rotation speed sensor 61 and the retaining shell 41, the rotation speed sensor 61 is electrically connected with the control box 62, and the electric push rod 31 is connected with the control box 62 through a peripheral circuit.

When this machinery barring is used to needs, speed sensor 61 can be started, speed sensor 61 can detect the rotational speed of the barring gear wheel on the steam turbine, when the telescopic link of electric putter 31 extends, can drive transmission gear 26 down-going and the barring gear wheel meshing on the steam turbine, thereby drive the barring gear wheel rotation on the steam turbine, and then drive the rotor rotation of steam turbine, when speed sensor 61 detects the rotational speed of the barring gear wheel on the steam turbine and reaches the default, speed sensor 61 signals, control box 62 receives the signal after the telescopic link of control electric putter 31 shortens, drive transmission gear 26 up-going and the barring gear wheel separation on the steam turbine, thereby reach automatic control's effect, need not manual control, time saving and labor saving.

The present application is described in detail above, and the principles and embodiments of the present application are described herein by using specific examples, which are only used to help understand the method and the core idea of the present application; meanwhile, for a person skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.

Claims (8)

1. The utility model provides a steam turbine is maintained and is used low-speed machinery barring, is including barring device (1), its characterized in that, still including drive mechanism (2), elevating system (3) and lubricated mechanism (4), is equipped with rotor pivoted drive mechanism (2) that are used for driving the steam turbine on barring device (1), is equipped with elevating system (3) that are used for controlling drive mechanism (2) and reciprocate on barring device (1), is equipped with on barring device (1) to be used for carrying out lubricated mechanism (4) to drive mechanism (2).

2. The low-speed mechanical barring for the steam turbine maintenance according to claim 1 is characterized in that the transmission mechanism (2) comprises a sliding rail (21), a sliding block (22), a rotating shaft (23), a pinion (24), a bearing shaft (25), a transmission gear (26) and first springs (27), the sliding rail (21) is connected to the front side of the barring device (1), the sliding block (22) is connected to the sliding rail (21) in a sliding mode, the rotating shaft (23) is connected to the sliding block (22) in a rotating mode, the pinion (24) is connected to the rear side of the rotating shaft (23), the pinion (24) moves downwards to be meshed with meshing gears of the barring device (1), the bearing shaft (25) is connected to the front side of the rotating shaft (23), the transmission gear (26) is connected to the bearing shaft (25) in a rotating mode, and the four first springs (27) are connected between the transmission gear (26) and the bearing shaft (25).

3. The low-speed mechanical jigger for turbine maintenance according to claim 2, wherein the lifting mechanism (3) comprises an electric push rod (31) and a fixed frame (32), the electric push rod (31) is connected to the front side of the jigger device (1), the electric push rod (31) is located above the slide rail (21), the fixed frame (32) is connected to a telescopic rod of the electric push rod (31), and the rotating shaft (23) is rotatably connected with the fixed frame (32).

4. The low-speed mechanical jigger for turbine maintenance according to claim 3, wherein the lubricating mechanism (4) comprises a blocking shell (41), an oil storage tank (42), a transmission assembly (43), a rotating rod (44), an oil inlet valve (45), a sponge column (46) and a discharge plate (47), the blocking shell (41) is connected to the front side of the jigger device (1), the blocking shell (41) is located on the left side of the electric push rod (31), the front side of the jigger device (1) is rotatably connected with the rotating rod (44), the oil storage tank (42) is connected to the rotating rod (44), the oil storage tank (42) is located on the inner side of the blocking shell (41), the transmission assembly (43) is connected between the engaging gears of the rotating rod (44) and the jigger device (1), the oil inlet valve (45) is connected to the front side of the oil storage tank (42) and communicated with the front side of the oil storage tank, the discharge plate (47) is connected with the plurality of discharge plates (47) at uniform intervals and communicated with each other, the discharge plate (47) is in contact with the transmission gear (26), and one end of the sponge column (46) which is far away from each other is connected with the oil storage plate.

5. The low-speed mechanical jigger for turbine maintenance according to claim 4, further comprising a protection mechanism (5) for protecting the transmission gear (26), wherein the protection mechanism (5) comprises a guide frame (51), a sliding protection frame (52), second springs (53), a connecting rod (54), a guide rod (55), a clamping rod (56) and a third spring (57), the guide frame (51) is connected to the right side of the jigger device (1), the sliding protection frame (52) is slidably connected to the guide frame (51), the transmission gear (26) is located on the inner side of the sliding protection frame (52), the two second springs (53) are connected between the sliding protection frame (52) and the guide frame (51), the connecting rod (54) is connected to the lower portion of the fixed frame (32), the two guide rods (55) are connected to the right side of the jigger device (1), the clamping rod (56) is slidably connected between the two guide rods (55), the connecting rod (54) is in contact with the clamping rod (56), and the third spring (57) is connected between the left side of the clamping rod (56) and the jigger device (1).

6. The low-speed mechanical barring for the steam turbine maintenance according to claim 5, further comprising a detection mechanism (6) for detecting the rotation speed of a barring gearwheel on the steam turbine, wherein the detection mechanism (6) comprises a rotation speed sensor (61) and a control box (62), the rotation speed sensor (61) is connected to the front side of the barring device (1), the rotation speed sensor (61) is located below the blocking shell (41), the control box (62) is connected to the front side of the barring device (1), the control box (62) is located between the rotation speed sensor (61) and the blocking shell (41), the rotation speed sensor (61) is electrically connected with the control box (62), and the electric push rod (31) is connected with the control box (62) through a peripheral circuit.

7. The low speed mechanical jigger for turbine maintenance according to claim 4, wherein the plurality of discharge plates (47) are formed in a circular shape.

8. The low-speed mechanical jigger for turbine maintenance according to claim 4, wherein the oil feed valve (45) is a check valve.

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