Manual turning gear of steam turbine

Abstract

The invention relates to the technical field of barring, and provides a steam turbine manual barring gear which comprises a supporting structure and a rack, the supporting structure is connected to a steam turbine cylinder body, the rack is slidably connected to the supporting structure, the bottom of the rack is evenly provided with shifting teeth at intervals in the length direction of the rack, and the shifting teeth are matched with a steam turbine ratchet wheel; one end of the rack is fixedly connected with one end of the turning pull rope, the other end of the turning pull rope is provided with the force application component used for applying turning pull force by a worker, the other end of the rack is fixedly connected with the first end of the return pull rope, and the second end of the return pull rope is connected with the return component used for pulling the rack to return. The turbine ratchet wheel can be pushed and turned from the top, and the problem that turning torque is inconvenient to apply to the turbine ratchet wheel at the bottom and the side due to the fact that the lower half portion of the turbine ratchet wheel is located in a turbine cylinder body is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of barring gears, and particularly to a manual barring gear for a steam turbine. Background Art

[0002] "Barring" refers to rotating the rotor of an electric motor or a steam turbine manually for several turns before starting it to determine whether the rotor is stuck and the resistance increases. At the same time, for a steam turbine wheel, barring also has the effect of making the rotor heat evenly to avoid thermal bending.

[0003] There are two types of barring gears: electric and manual. For large and extra-large steam turbine units, electric barring gears are usually used. For medium and small steam turbines, either an electric barring machine or a manual barring machine can be used. Most conventional manual barring machines require manual prying or turning of the barring wheel, and generally require multiple people to operate simultaneously to apply sufficient barring power. In addition, existing barring gears often rely on the elastic force of elastic components such as springs or shrapnel to ensure that their driving wheels or teeth engage with the ratchet of the steam turbine. The elastic components are prone to damage after long-term use, resulting in the loss of the transmission effect of the barring gear or a significant deterioration. In addition, in most cases, the ratchet of the steam turbine is not completely exposed, but half of it is inside the bottom cylinder. At this time, it is difficult to install the barring wheel or the manual barring mechanism disclosed in CN212958788U on one side or the bottom of the steam turbine rotor, so it is not applicable. Therefore, it is necessary to provide a manual barring gear for a steam turbine to overcome the above deficiencies. Summary of the Invention

[0004] The present invention provides a manual barring gear for a steam turbine to solve the technical problems existing in the prior art as described in the above background art.

[0005] To solve the above problems, the present invention discloses a manual barring gear for a steam turbine, including:

[0006] A support structure and a rack. The support structure is connected to the steam turbine cylinder body, the rack is slidably connected to the support structure, and teeth are evenly spaced along the length direction at the bottom of the rack and cooperate with the ratchet of the steam turbine.

[0007] A barring pull rope, a return pull rope, a force application component, and a return component. One end of the rack is fixedly connected to one end of the barring pull rope, and a force application component for a worker to apply barring force is provided at the other end of the barring pull rope. The other end of the rack is fixedly connected to the first end of the return pull rope, and a return component for pulling the rack back is connected to the second end of the return pull rope.

[0008] Preferably, the axial direction of the ratchet of the steam turbine is the front-back direction, and the support structure includes:

[0009] Two support columns, two sliding sleeves, and a rack. The two support columns are symmetrically arranged on the left and right sides of the steam turbine ratchet. The support columns are connected to the steam turbine cylinder block. The two sliding sleeves are fixedly connected to the tops of the two support columns in a one-to-one correspondence. The rack horizontally penetrates through the two sliding sleeves in the left-right direction, and the rack is in sliding fit with the sliding sleeves; a limit block is provided on the rack, and the limit block cannot enter the sliding sleeve.

[0010] Preferably, the sliding sleeve has a T-shaped groove with an opening downward. Components for reducing friction are evenly distributed on the two inner side walls and the horizontal inner wall at the opening of the T-shaped groove. The rack passes through the wide part at the upper part of the T-shaped groove, and the lower part of the toothed segment passes through the narrow part at the lower part of the T-shaped groove. There is a certain distance between the top of the rack and the top inner wall of the T-shaped groove.

[0011] Preferably, the support column is a structure with adjustable telescopic length; the components for reducing friction include but are not limited to bull's-eye universal bearings.

[0012] Preferably, the force-applying component includes but is not limited to any one of a handle and a pedal; the return component is a spring component or a counterweight. The upper end of the spring component is fixedly connected to the second end of the return pull rope, the lower end of the spring component is fixed to the ground and the steam turbine cylinder block, and the counterweight is fixedly connected to the second end of the return pull rope.

[0013] Preferably, it further includes:

[0014] A rope sleeve for guiding the return pull rope. The rope sleeve is fixed to the ground or the steam turbine cylinder block through a fixing frame, and a handhold is fixedly connected to the rope sleeve;

[0015] A limit guide rod. The limit guide rod is fixed to the ground, and the pedal is slidably connected to the limit guide rod.

[0016] Preferably, a top block is fixedly connected to the top of the support column, and the top block is connected to the sliding sleeve by screws.

[0017] Preferably, it further includes: a pulley structure. The barring rope and the return pull rope are wound around the corresponding pulley structures.

[0018] Compared with the prior art, the present invention has the following beneficial effects: Workers apply force to the force-applying component, causing the rack to move to the left. Through the cooperation between the toothed segments on the rack and the steam turbine ratchet, the steam turbine ratchet rotates to achieve barring. When the rack is pulled to the left to drive the steam turbine ratchet to complete one rotation action, the force-applying component is relaxed, and the counterweight pulls the rack back into place by its own weight for the next pull.

[0019] The rack relies on its own weight to press on the turbine ratchet and mesh with it for transmission, avoiding the problem in the prior art that elastic components such as springs are prone to fatigue and damage after long-term use when this function is achieved; when the turbine ratchet is driven to rotate by the turning gear, when its rotation speed is faster than the speed at which the rack is pulled horizontally to the left, the ratchet teeth of the turbine ratchet can push the rack upward (when the rack returns to the right, it will also be pushed upward by the ratchet teeth of the turbine ratchet to release the engagement), with a simple structure and easy use; the device can push the turbine ratchet to turn from the top, solving the problem that the lower half of the turbine ratchet is located in the turbine cylinder body, making it inconvenient to apply a turning torque to the turbine ratchet at the bottom and side.

[0020] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0022] Figure 1 It is a schematic diagram of the overall main structure of the present invention;

[0023] Figure 2 For the present invention Figure 1 Schematic diagram of the internal structure of the middle sliding sleeve from the left;

[0024] Figure 3 It is a schematic diagram of the coordination of the rope loop, hand handle, pedal, limit guide rod and turning rope of the present invention.

[0025] In the figure: 1. support column; 2. sliding sleeve; 3. turbine cylinder; 4. rack; 5. shifting gear; 6. limit block; 7. fixed pulley; 8. turning rope; 9. return rope; 10. counterweight; 11. fixed frame; 12. rope loop; 13. hand handle; 14. pedal; 15. bull's eye universal bearing; 16. top block; 17. limit guide rod; 18. turbine ratchet; 19. T-shaped groove. DETAILED DESCRIPTION

[0026] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0027] In addition, in the present invention, descriptions such as "first" and "second" are only for descriptive purposes, and do not particularly refer to the order or sequence. Nor are they used to limit the present invention. They are merely used to distinguish components or operations described with the same technical terms, and should not be construed as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions and technical features between various embodiments may be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0028] The technical solutions of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0029] The present invention provides the following embodiments

[0030] Embodiment 1. An embodiment of the present invention provides a manual barring gear for a steam turbine, as Figures 1-3 shown, including:

[0031] A support structure and a rack 4. The support structure is connected to the steam turbine cylinder block 3. The rack 4 is slidably connected to the support structure. Teeth 5 are evenly spaced along the length direction at the bottom of the rack 4. The teeth 5 cooperate with the steam turbine ratchet wheel 18.

[0032] A barring rope 8 (a steel wire rope), a return rope 9, a force - applying member, and a return member. One end of the rack 4 is fixedly connected to one end of the barring rope 8. A force - applying member for a worker to apply barring force is provided at the other end of the barring rope 8. The other end of the rack 4 is fixedly connected to the first end of the return rope 9. A return member for pulling the rack 4 back is connected to the second end of the return rope 9.

[0033] Preferably, the axial direction of the steam turbine ratchet wheel 18 is the front - rear direction. The support structure includes:

[0034] Two support columns 1, two sliding sleeves 2, and a rack 4. The two support columns 1 are symmetrically arranged on the left and right sides of the steam turbine ratchet wheel 18. The support columns 1 are connected to the steam turbine cylinder block 3. The two sliding sleeves 2 are fixedly connected to the tops of the two support columns 1 one by one. The rack 4 horizontally penetrates through the two sliding sleeves 2 along the left - right direction. The rack 4 is slidably mated with the sliding sleeves 2. A limit block 6 is provided on the rack 4, and the limit block 6 cannot enter the sliding sleeve 2.

[0035] Preferably, the sliding sleeve 2 has a T-shaped groove 19 with an opening facing downward. Components for reducing friction are evenly distributed on both inner side walls of the T-shaped groove 19 and the horizontal inner wall at the opening. The rack 4 passes through the wide part at the upper part inside the T-shaped groove 19, and the lower part of the shifting tooth 5 passes through the narrow part at the lower part of the T-shaped groove 19. There is a certain distance between the top of the rack 4 and the top inner wall of the T-shaped groove 19. When the rack 4 returns, the rack 4 will be jacked up by a distance by the ratchet teeth of the steam turbine ratchet 18, so that the shifting tooth 5 is disengaged from the ratchet teeth;

[0036] Preferably, the support column 1 is a structure with adjustable telescopic length (such as a multi-stage hydraulic cylinder, a jack, a screw rod whose length can be adjusted by screwing in to adjust elongation or shortening); the components for reducing friction include but are not limited to the bull's-eye universal bearing 15; the rack 4 is slidably matched with the inner wall of the T-shaped groove 19 through the bull's-eye universal bearing 15.

[0037] Preferably, the force-applying component includes but is not limited to any one of a handle and a pedal 14; the return component is a spring component or a counterweight 10. The upper end of the spring component is fixedly connected to the second end of the return pulling rope 9, the lower end of the spring component is fixed to the ground and the steam turbine cylinder block 3, and the counterweight 10 is fixedly connected to the second end of the return pulling rope 9. The force-applying component can be a simple handle. At this time, the pulling rope 8 for barring gear is pulled by hand, or it can be a force-applying component including the pedal 14 as shown in Figure 1 As shown, in this case, the whole person can stand on the pedal 14 and use the body weight to apply a pulling force to the pulling rope 8 for barring gear;

[0038] Preferably, it further includes:

[0039] A rope sleeve 12 for guiding the return pulling rope 9. The rope sleeve 12 is fixed to the ground or the steam turbine cylinder block 3 through a fixing bracket 11. A handgrip 13 is fixedly connected to the rope sleeve 12. In order to ensure that people can stand on the pedal 14 more easily and prevent the hand from being scratched by the pulling rope 8 (steel wire rope) for barring gear, a rope sleeve 12 for guiding the pulling rope 8 (steel wire rope) for barring gear can be provided. The rope sleeve 12 is a rigid tubular object, and a linear bearing or a self-lubricating copper sleeve embedded with graphite can be arranged inside. The handgrip 13 is fixed to the rope sleeve 12, which is convenient for workers to stand on the pedal 14 or apply a single-foot stepping force to the pedal 14 after holding the handgrip 13;

[0040] A limiting guide rod 17. The limiting guide rod 17 is fixed to the ground, and the pedal 14 is slidably connected to the limiting guide rod 17. In order to avoid the shaking of the pedal 14, a limiting guide rod 17 fixed to the ground is provided. The pedal 14 passes through the limiting guide rod 17 and is slidably matched with it. In this way, the shaking can be effectively avoided and the force application is easier;

[0041] Preferably, the top end of the support column 1 is fixedly connected with a top block 16, and the top block 16 is connected to the sliding sleeve 2 by screws.

[0042] Preferably, it further includes: a pulley structure, and the turning rope 8 and the return rope 9 are wound around the corresponding pulley structures. For example, it includes a fixed pulley 7, and the fixed pulley 7 is connected to the fixed frame 11 through a fixed pulley bracket; neither the left nor the right side is limited to the fixed pulley 7. When it is necessary to turn the turbine more labor-savingly, an appropriate amount of movable pulleys and more necessary fixed pulleys can be added, so that the turbine can be turned with a smaller force.

[0043] In order to prevent the rack 4 from being completely pulled out of the sliding sleeve 2, a limiting block 6 can be provided on the side of the rack 4 (the limiting block 6 can be provided in the middle of the rack 4 between the two sliding sleeves 2). When a stroke (when the rack 4 moves to the left to complete) ends, the limiting block 6 approaches or abuts against the left sliding sleeve 2 to prevent the rack 4 from being pulled out of the sliding sleeve 2. Two limiting blocks 6 can be provided. In addition to the above-mentioned limiting block 6, the other limiting block 6 can prevent the rack 4 from returning too far to the right.

[0044] The beneficial effects of the above technical solutions are as follows:

[0045] The worker applies a force to the force-applying component, causing the rack 4 to move to the left. Through the cooperation of the teeth 5 on the rack 4 and the turbine ratchet 18, the turbine ratchet 18 rotates to realize turning the turbine. When the rack 4 is pulled to the left to drive the turbine ratchet 18 to complete a rotation action, the force-applying component is relaxed, and the counterweight 10 pulls the rack 4 back to its original position by its own weight for the next pull.

[0046] The rack 4 presses on the turbine ratchet 18 by its own weight and meshes with it for transmission, avoiding the problem that the elastic components such as springs are prone to fatigue damage after long-term use when realizing this function in the prior art; when the turbine ratchet 18 is driven to rotate by turning the turbine, when its rotation speed is faster than the speed at which the rack 4 is horizontally pulled to the left, the ratchet teeth of the turbine ratchet 18 can lift the rack 4 upward (the rack 4 will also be lifted upward by the ratchet teeth of the turbine ratchet 18 to disengage the meshing when the rack 4 returns to the right). The structure is simple and easy to use; this device can push and turn the turbine ratchet 18 from the top, solving the problem that it is inconvenient to apply a turning torque to the turbine ratchet 18 at the bottom and side because the lower half of the turbine ratchet 18 is located in the turbine cylinder block 3.

[0047] Embodiment 2, on the basis of Embodiment 1, a counterweight 10 weight determination module, and the counterweight 10 weight determination module includes:

[0048] A counterweight 10 weight determination module, and the counterweight 10 weight determination module includes:

[0049] The first acquisition module: used to acquire the total weight of all components on the shaft where the turbine ratchet 18 of the current steam turbine is located, the radius of the turbine ratchet 18, and the length of the shaft where the turbine ratchet 18 of the current steam turbine is located;

[0050] Second acquisition module: used to acquire the required speed of the steam turbine ratchet 18 during barring gear operation;

[0051] Third acquisition module: used to acquire the surface roughness of all components on the shaft where the steam turbine ratchet 18 of the current steam turbine is located and the friction coefficient between all components on the shaft where the steam turbine ratchet 18 of the current steam turbine is located and air;

[0052] Air density detection module, used to acquire the air density in the environment where the steam turbine ratchet 18 of the current steam turbine is located;

[0053] Fourth acquisition module, used to acquire the historical data of the current steam turbine during a period of time before the current barring gear operation. The historical data includes: the input power of the shaft where the steam turbine ratchet 18 of the current steam turbine is located at the historical moment, the output torque of the shaft where the steam turbine ratchet 18 of the current steam turbine is located at the historical moment, and the speed of the shaft where the steam turbine ratchet 18 of the current steam turbine is located at the historical moment;

[0054] First calculation module, used to calculate the loss state coefficient based on the fourth acquisition module;

[0055]

[0056] W is the loss state coefficient; the fourth acquisition module acquires historical data at T historical moments; the time of the i-th historical moment is before the time of the (i + 1)-th historical moment; P i is the input power of the shaft where the steam turbine ratchet 18 of the current steam turbine is located at the i-th historical moment acquired by the fourth acquisition module; D i is the output torque of the shaft where the steam turbine ratchet 18 of the current steam turbine is located at the i-th historical moment acquired by the fourth acquisition module; n i is the speed of the shaft where the steam turbine ratchet 18 of the current steam turbine is located at the i-th historical moment acquired by the fourth acquisition module;

[0057] Second calculation module, used to calculate the weight of the first counterweight based on the first acquisition module, the second acquisition module, the third acquisition module, the air density detection module, and the first calculation module;

[0058]

[0059] Wherein: M is the weight of the first counterweight; A is the average surface roughness of all components on the shaft where the turbine ratchet 18 of the current steam turbine is located; B is the average friction coefficient between all components on the shaft where the turbine ratchet 18 of the current steam turbine is located and air; C is the air density detected by the air density detection module; R is the average radius of all components on the shaft where the turbine ratchet 18 of the current steam turbine is located; D is the radius of the turbine ratchet 18; L is the length of the shaft where the turbine ratchet 18 of the current steam turbine is located; t is the unit time; N is the total weight of all components on the shaft where the turbine ratchet 18 of the current steam turbine is located; n is the required rotational speed of the turbine ratchet 18 during barring gear operation; ln is the natural logarithm, and e is the natural constant; g is the acceleration due to gravity; U is the counterweight adjustment coefficient; W 0 is the initial value corresponding to the shaft where the turbine ratchet 18 of the current steam turbine is located and is obtained by selecting T moments within a certain period of time when the current steam turbine is initially used for testing the corresponding initial value); P i-1 is the input power of the shaft where the turbine ratchet 18 of the current steam turbine is located at the (i - 1)-th historical moment obtained by the fourth acquisition module; D i-1 is the output torque of the shaft where the turbine ratchet 18 of the current steam turbine is located at the (i - 1)-th historical moment obtained by the fourth acquisition module; n i-1 is the rotational speed of the shaft where the turbine ratchet 18 of the current steam turbine is located at the (i - 1)-th historical moment obtained by the fourth acquisition module; t i is the time difference between the (i - 1)-th historical moment and the i-th historical moment obtained by the fourth acquisition module; π is taken as 3.14;

[0060] A display module, configured to display the weight of the first counterweight, and the total weight of the counterweight 10 set for the current barring gear operation is the weight of the first counterweight.

[0061] The beneficial effects of the above technical solution are as follows:

[0062] Based on the historical data of the current steam turbine within a certain period of time before the current barring gear operation, the latest loss state coefficient of the steam turbine is obtained, and then based on the latest loss state coefficient of the steam turbine and the relevant parameters of the components on the shaft where the turbine ratchet 18 of the current steam turbine is located obtained by the first acquisition module, the second acquisition module, and the third acquisition module, the weight of the first counterweight is calculated. The total weight of the counterweight 10 set for the current barring gear operation is the weight of the first counterweight, ensuring the selection of an appropriate total weight of the counterweight to ensure the return effect.

[0063] is the weight of the counterweight considering the mechanical loss state requirements.

[0064] Obviously, those skilled in the art can make various modifications and variations to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention also intends to include these modifications and variations.

Claims

1. A manual turning device for a steam turbine, characterized in that: include: A support structure and a rack (4), wherein the support structure is connected to a steam turbine cylinder (3), the rack (4) is slidably connected to the support structure, and the bottom of the rack (4) is provided with shifting teeth (5) evenly spaced along its length, and the shifting teeth (5) cooperate with a steam turbine ratchet (18); A turning pull rope (8), a return pull rope (9), a force-applying component, and a return component. One end of the rack (4) is fixedly connected to one end of the turning pull rope (8), and the other end of the turning pull rope (8) is provided with a force-applying component for a worker to apply a turning pull force. The other end of the rack (4) is fixedly connected to the first end of the return pull rope (9), and the second end of the return pull rope (9) is connected to the return component for pulling the rack (4) back to its original position.

2. A manual turning device for a steam turbine according to claim 1, characterized in that: The axial direction of the steam turbine ratchet (18) is the front-rear direction, and the supporting structure includes: Two support columns (1), two sliding sleeves (2), and a rack (4); the two support columns (1) are symmetrically arranged on the left and right sides of a steam turbine ratchet (18); the support columns (1) are connected to a steam turbine cylinder (3); the two sliding sleeves (2) are fixedly connected to the top ends of the two support columns (1) in a one-to-one correspondence; the rack (4) horizontally penetrates the two sliding sleeves (2) along the left-right direction; the rack (4) and the sliding sleeve (2) are slidably matched; a limit block (6) is arranged on the rack (4), and the limit block (6) cannot enter the sliding sleeve (2).

3. A manual turning device for a steam turbine according to claim 2, characterized in that: The sliding sleeve (2) has a T-shaped groove (19) opening downward, and components for reducing friction are evenly distributed on the two inner side walls of the T-shaped groove (19) and the horizontal inner wall located at the opening. The rack (4) passes through the wide part of the upper inner part of the T-shaped groove (19), and the lower shifting tooth (5) passes through the narrow part of the lower part of the T-shaped groove (19), and the top of the rack (4) is separated from the top inner wall of the T-shaped groove (19) by a certain distance.

4. A manual turning device for a steam turbine according to claim 3, characterized in that: The support column (1) is a structure that can be telescopically adjusted in length; the components that reduce friction include but are not limited to bull's eye universal bearings (15).

5. A manual turning device for a steam turbine according to claim 3, characterized in that: The force-applying component includes but is not limited to any one of a handle and a pedal (14); the return component is a spring component or a counterweight (10), the upper end of the spring component is fixedly connected to the second end of the return rope (9), the lower end of the spring component is fixed to the ground and the turbine cylinder (3), and the counterweight (10) is fixedly connected to the second end of the return rope (9).

6. A manual turning device for a steam turbine according to claim 1, characterized in that: Also includes: A rope loop (12) for guiding the return pull rope (9), the rope loop (12) being fixed to the ground or the steam turbine cylinder body (3) through a fixing frame (11), and a hand grip (13) being fixedly connected to the rope loop (12); A limiting guide rod (17) is fixed to the ground, and the pedal (14) is slidably connected to the limiting guide rod (17).

7. A manual turning device for a steam turbine according to claim 2, characterized in that: A top block (16) is fixedly connected to the top of the support column (1), and the top block (16) is connected to the sliding sleeve (2) via screws.

8. A manual turning device for a steam turbine according to claim 1, characterized in that: Also includes: The pulley structure, the turning rope (8) and the return rope (9) are wound around the corresponding pulley structure.

9. A manual turning device for a steam turbine according to claim 1, characterized in that: Also includes: A weight determination module for a counterweight block (10), the weight determination module for a counterweight block (10) comprising: The first acquisition module is used to acquire the total weight of all components on the shaft where the steam turbine ratchet (18) of the current steam turbine is located, the radius of the steam turbine ratchet (18), and the length of the shaft where the steam turbine ratchet (18) of the current steam turbine is located; The second acquisition module is used to acquire the required rotation speed of the steam turbine ratchet (18) during cranking; The third acquisition module is used to acquire the surface roughness of all parts on the shaft where the steam turbine ratchet (18) of the current steam turbine is located and the friction coefficient between all parts on the shaft where the steam turbine ratchet (18) of the current steam turbine is located and the air; An air density detection module, used for obtaining the air density of the environment where the steam turbine ratchet (18) of the current steam turbine is located; The fourth acquisition module is used to acquire historical data of the current steam turbine within a period of time before the current cranking, the historical data including: the input power of the shaft where the steam turbine ratchet (18) of the current steam turbine is located at the historical moment, the output torque of the shaft where the steam turbine ratchet (18) of the current steam turbine is located at the historical moment, and the rotation speed of the shaft where the steam turbine ratchet (18) of the current steam turbine is located at the historical moment; A first calculation module, used for calculating a loss state coefficient based on a fourth acquisition module; W is the loss state coefficient; the fourth acquisition module acquires the historical data of T historical moments in total; the time of the i-th historical moment is before the time of the i+1-th historical moment; P i The input power of the shaft where the steam turbine ratchet (18) of the current steam turbine is located at the i-th historical moment obtained by the fourth acquisition module; D i The output torque of the shaft where the steam turbine ratchet (18) of the current steam turbine is located at the i-th historical moment obtained by the fourth acquisition module; n i The rotation speed of the shaft on which the turbine ratchet (18) of the current steam turbine is located at the i-th historical moment acquired by the fourth acquisition module; A second calculation module, used for calculating the weight of the first counterweight based on the first acquisition module, the second acquisition module, the third acquisition module, the air density detection module, and the first calculation module; Wherein: M is the weight of the first counterweight; A is the average value of the surface roughness of all parts on the shaft where the steam turbine ratchet (18) of the current steam turbine is located; B is the average value of the friction coefficient between all parts on the shaft where the steam turbine ratchet (18) of the current steam turbine is located and the air; C is the air density detected by the air density detection module; R is the average value of the radius of all parts on the shaft where the steam turbine ratchet (18) of the current steam turbine is located; D is the radius of the steam turbine ratchet (18); L is the length of the shaft where the steam turbine ratchet (18) of the current steam turbine is located; t is the unit time; N is the total weight of all parts on the shaft where the steam turbine ratchet (18) of the current steam turbine is located; n is the required speed of the steam turbine ratchet (18) when turning; ln is the natural logarithm, e is the natural constant; g is the gravitational acceleration; U is the counterweight adjustment coefficient; W0 is the relative velocity of the shaft where the steam turbine ratchet (18) of the current steam turbine is located and The corresponding initial value; P i-1 The input power of the shaft where the steam turbine ratchet (18) of the current steam turbine is located at the i-1th historical moment obtained by the fourth acquisition module; D i-1 The output torque of the shaft where the steam turbine ratchet (18) of the current steam turbine is located at the i-1th historical moment obtained by the fourth acquisition module; n i-1 The rotation speed of the shaft where the turbine ratchet (18) of the current turbine is located at the i-1th historical moment acquired by the fourth acquisition module; t i is the time difference between the i-1th historical moment and the ith historical moment obtained by the fourth obtaining module; the value of π is 3.14; The display module is used to display the weight of a first counterweight block, and the total weight of the counterweight block (10) set during the current turning operation is the weight of the first counterweight block.

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