Motion adjusting device of mechanical fly ball and steam turbine

Abstract

The invention discloses an action adjusting device of a mechanical fly ball and a steam turbine, and belongs to the technical field of steam turbine equipment. The device is used for extending into a bearing box from an observation through hole of the bearing box and being connected with an adjusting nut of a fly ball, and comprises an adjusting rod and an adjusting head, the outer diameter of the adjusting rod and the outer diameter of the adjusting head are smaller than those of the observation through hole. The axial length of the adjusting rod is larger than the distance between the bearing box and the inner wall of the bearing box. The adjusting head is fixedly connected with one end of the adjusting rod, an adjusting groove for the adjusting nut to be inserted is formed in the end face, away from the adjusting rod, of the adjusting head, and the adjusting groove is matched with the adjusting nut in shape. In the adjusting process of the device, the bearing box end cover on the side where the fly ball is located does not need to be lifted away through hoisting equipment, an operator does not need to enter the bearing box for operation, and the whole adjusting process of the adjusting nut is very convenient.

Description

Technical Field

[0001] This invention relates to the field of steam turbine equipment technology, and in particular to a mechanical fly hammer motion adjustment device and a steam turbine. Background Technology

[0002] Steam turbines are the core power equipment in power plants, and their safe operation is of paramount importance. The flyweight, located within the bearing housing, serves as the final mechanical overspeed protection mechanism. Its accuracy and reliability directly impact the safety of the main unit. To ensure accurate operation of the flyweight at the set speed, daily observation, periodic testing, and periodic calibration are necessary during operation. Daily observation primarily involves using the observation holes on the bearing housing to check for any problems with the operation of the flyweight and its adjusting nut. Periodic testing and calibration mainly involve testing, calibrating, and adjusting the spring preload of the flyweight after the entire unit is shut down. This adjustment is achieved primarily by rotating the adjusting nut inside the flyweight.

[0003] However, adjusting the adjusting nut is extremely inconvenient. In the existing technology, the adjustment of the adjusting nut is mainly carried out after the turbine is shut down, by using a crane to lift open the bearing housing end cover on the side where the flyweight is located. This process involves removing a large number of connecting bolts, accessories and pipelines, which is a huge amount of work. After the bearing housing end cover is removed, technicians need to enter the bearing housing and use a special wrench or lever to adjust the adjusting nut in the center of the flyweight in the narrow space. The whole adjustment process is cumbersome, time-consuming and extremely inconvenient. Summary of the Invention

[0004] This invention provides a mechanical flying hammer motion adjustment device and a steam turbine, aiming to solve the problem of the inconvenience of adjusting the adjusting nut in the prior art.

[0005] The first aspect of the present invention provides a motion adjustment device for a mechanical fly hammer, which extends into the bearing housing through an observation hole and is connected to the adjusting nut of the fly hammer, and includes an adjusting rod and an adjusting head;

[0006] The outer diameter of the adjusting rod and the outer diameter of the adjusting head are both smaller than the observation through hole;

[0007] The axial length of the adjusting rod is greater than the distance between the bearing housing and the inner wall of the bearing housing;

[0008] The adjusting head is fixedly connected to one end of the adjusting rod. The end face of the adjusting head away from the adjusting rod is provided with an adjusting groove for the adjusting nut to be inserted. The adjusting groove matches the shape of the adjusting nut.

[0009] In some embodiments of the first aspect, the adjusting rod includes a first rod segment, a second rod segment, and a third rod segment connected in sequence;

[0010] The diameter of the first rod segment is smaller than the diameter of the second rod segment, the diameter of the second rod segment is smaller than the diameter of the third rod segment, and the adjusting head is fixedly connected to one end of the third rod segment;

[0011] The axial length of the first segment is greater than the axial length of the second segment and the axial length of the third segment, and the axial length of the second segment is less than the axial length of the third segment.

[0012] In some embodiments of the first aspect, the surfaces of the first segment and the second segment are connected by a beveled transition.

[0013] In some embodiments of the first aspect, the surface of the second segment and the surface of the third segment are connected by a stepped transition.

[0014] In some embodiments of the first aspect, the first rod segment is further provided with a radial through hole for inserting a rod that assists in rotation;

[0015] When the motion adjustment device extends into the bearing housing and connects with the adjusting nut, the radial through hole is located outside the bearing housing.

[0016] In some embodiments of the first aspect, the motion adjustment device further includes a dial;

[0017] The dial is sleeved outside the adjusting rod, and the rotation of the dial is independent of the rotation of the adjusting rod;

[0018] When the motion adjustment device extends into the bearing housing and connects with the adjusting nut, the dial is located outside the bearing housing.

[0019] In some embodiments of the first aspect, the motion adjustment device further includes a handle assembly;

[0020] The handle assembly includes a first handle and a second handle;

[0021] The first handle is detachably mounted on the adjusting rod, and the second handle is detachably mounted on the dial.

[0022] In some embodiments of the first aspect, the first handle is located on the side of the dial away from the bearing housing;

[0023] The first handle includes a handle ring and a strip-shaped grip; the handle ring is detachably sleeved on the outside of the adjusting rod; the strip-shaped grip is connected and fixed to the handle ring, and along the axial direction of the adjusting rod, the projection of the strip-shaped grip on the scale is a long strip-shaped projection.

[0024] In some embodiments of the first aspect, the motion adjustment device further includes a drive mechanism, the output end of which is fixedly connected to the adjustment rod, and the drive mechanism is used to drive the adjustment rod to rotate.

[0025] A second aspect of the present invention provides a steam turbine, comprising:

[0026] A bearing housing, comprising a housing body, an end cap, and a transparent sealing element, wherein the end cap is detachably mounted on the housing body to enclose and form the bearing housing, the end cap is provided with an observation through hole, and the transparent sealing element is detachably mounted on the end cap and sealably covers the observation through hole;

[0027] A flying hammer, which is installed inside the bearing housing, and the adjusting nut of the flying hammer is arranged coaxially with the observation through hole;

[0028] The motion adjustment device described in the first aspect is inserted into the bearing housing through the observation through hole and connected to the adjusting nut.

[0029] As can be seen from the above technical solutions, the present invention has the following advantages:

[0030] This invention provides a motion adjustment device for a mechanical fly hammer and a steam turbine, including an adjusting rod and an adjusting head. Since the axial length of the adjusting rod is greater than the distance between the bearing housing and its inner wall, and one end of the adjusting rod has an adjusting head with a matching adjusting groove for inserting the adjusting nut, during application, the operator can insert the adjusting rod with the adjusting head into the bearing housing and insert the fly hammer's adjusting nut into the adjusting groove of the adjusting head to establish a connection between the motion adjustment device and the adjusting nut. The other end of the adjusting rod is located outside the bearing housing for easy rotation by the operator, thereby changing the tightness of the adjusting nut and adjusting the spring preload of the fly hammer. Therefore, the entire process does not require the use of large lifting equipment to open the bearing housing end cover on the fly hammer side, nor does it require the operator to enter the bearing housing. The entire adjustment process of the adjusting nut is very convenient. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1This is a front view schematic diagram of the overall structure of a mechanical flying hammer motion adjustment device provided in an embodiment of the present invention;

[0033] Figure 2 A schematic diagram of the structure of a mechanical flying hammer motion adjustment device (handle assembly omitted) provided in an embodiment of the present invention;

[0034] Figure 3 This is a top view schematic diagram of the overall structure of a mechanical flying hammer motion adjustment device provided in an embodiment of the present invention;

[0035] Figure 4 This is a schematic diagram of the overall structure of the dial provided in an embodiment of the present invention.

[0036] Figure label:

[0037] Adjusting rod 1; first rod segment 10; radial through hole 100; positioning pin 101; second rod segment 11; third rod segment 12; adjusting head 2; dial 3; handle assembly 4; first handle 40; handle ring 400; strip grip 401; second handle 41. Detailed Implementation

[0038] To make the objectives, features, and advantages of this invention more apparent and understandable, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0039] Steam turbines are the core power equipment in power plants, and their safe operation is of paramount importance. The flyweight, as the last line of mechanical overspeed protection, directly affects the safety of the main unit. To ensure accurate operation of the flyweight at the set speed, regular testing and calibration are necessary. The detailed steps of the existing testing and calibration methods are as follows: Step 1: Shutdown and Isolation: The steam turbine is completely shut down, related systems are isolated, and the equipment is confirmed to be in a safe maintenance state. Step 2: End Cover Removal: The bearing housing end cover on the side where the flyweight is located is lifted using lifting equipment. This process involves removing a large number of connecting bolts, accessories, and pipelines, resulting in a significant workload. Step 3: Technicians enter the bearing housing through the opened end cover inlet. In the confined space, a special wrench or lever is used to adjust the nut (usually an internal hexagonal socket) in the center of the flyweight. Step 4: Experienced Adjustment: Based on the deviation between the test results and the target value, technicians judge the adjustment direction and approximate number of turns based on their personal experience, and manually rotate the wrench. Due to space constraints, measuring tools cannot be used, and estimations are usually made by "turning a wrench at a certain angle" or "a fraction of a turn"; Step 5: Reset and verification: After adjustment, personnel leave, re-hoist and tighten the bearing housing end cover, and restore all pipelines and accessories; Step 6: Finally, start the unit again to conduct an overspeed test to verify the effect. If it fails, all the above steps must be repeated.

[0040] However, in this traditional adjustment method, the bearing housing end cover on the side where the fly hammer is located is lifted off using lifting equipment. This process involves removing a large number of connecting bolts, accessories and pipelines, which is a huge amount of work. After the bearing housing end cover is removed, technicians need to enter the bearing housing and use a special wrench or lever to adjust the fly hammer in the narrow space. The whole adjustment process is cumbersome, time-consuming and extremely inconvenient.

[0041] To address this issue, embodiments of the present invention provide a mechanical flying hammer motion adjustment device and a steam turbine, which solve the technical problem that adjusting the adjusting nut is extremely inconvenient in the prior art.

[0042] Please see Figures 1 to 4 The first aspect of the present invention provides a mechanical flyweight motion adjustment device for extending into the bearing housing through an observation hole and connecting to the adjusting nut of the flyweight, comprising:

[0043] Adjusting rod 1, the outer diameter of adjusting rod 1 is smaller than the observation through hole, and the axial length of adjusting rod 1 is greater than the distance between the bearing housing and the inner wall of the bearing housing;

[0044] Adjusting head 2 is fixedly connected to one end of adjusting rod 1. The outer diameter of adjusting head 2 is smaller than the observation through hole. The end face of adjusting head 2 away from adjusting rod 1 is provided with an adjusting groove (not shown in the figure, located at...) for inserting the adjusting nut. Figure 1 On the bottom end face), the adjusting groove matches the shape of the adjusting nut.

[0045] It should be noted that since the outer diameter of the adjusting rod 1 and the adjusting head 2 is smaller than the observation through hole, the adjusting rod 1 and the adjusting head 2 can smoothly pass through the observation through hole and enter. Furthermore, since the shape of the adjusting groove matches that of the adjusting nut, the adjusting nut can be inserted into the adjusting groove.

[0046] In the specific operation of this embodiment, when it is necessary to adjust the adjusting nut of the fly hammer, the adjusting rod 1 is inserted into the bearing housing through the observation hole. When the adjusting head 2 reaches the appropriate position, the adjusting nut of the fly hammer is inserted into the adjusting groove on the end face of the adjusting head 2. After the connection is established, the operator can rotate the adjusting rod 1 outside the bearing housing so that the adjusting head 2 can drive the adjusting nut to rotate, thereby loosening or tightening the spring preload.

[0047] Therefore, the advantages of this embodiment are as follows: First, it allows for rapid online adjustment: the motion adjustment device of this embodiment does not require the use of a crane to open the bearing housing end cover, nor does it require the removal of a large number of connecting bolts, accessories, and pipelines. The tooling is compact, and adjustment can be made simply by opening the observation hole on the bearing housing, greatly shortening the adjustment time and fundamentally eliminating the huge workload caused by the disassembly and assembly of the end cover, thus achieving a significant efficiency improvement from several hours to a few minutes. Second, it is safe and easy to operate: operators can safely and effortlessly operate the motion adjustment device of this embodiment from outside the bearing housing, avoiding the inconvenience of working in narrow spaces. All operations can be completed from the outside, thus completely eliminating the safety risks of working in confined spaces, greatly reducing the workload and difficulty of operation, and making operation safer and less strenuous. Third, it can protect the integrity of the equipment: avoiding potential damage to the equipment caused by the disassembly and assembly of the end cover. Fourth, it can maintain the long-term operational reliability of the equipment: avoiding frequent disassembly and assembly of the end cover, thus protecting the sealing surface of the end cover and preventing damage to the sealing of the mating surface caused by frequent disassembly and assembly of the bearing housing end cover, leading to problems such as oil leakage.

[0048] In one specific embodiment, such as Figure 1 and Figure 2 As shown, a feasible structure for the adjusting rod 1 is further provided. The adjusting rod 1 includes a first rod segment 10, a second rod segment 11, and a third rod segment 12 integrally connected in sequence. The diameter of the first rod segment 10 is smaller than the diameter of the second rod segment 11, and the diameter of the second rod segment 11 is smaller than the diameter of the third rod segment 12. The adjusting head 2 is fixedly connected to one end of the third rod segment 12. The axial length of the first rod segment 10 is greater than the axial lengths of the second rod segment 11 and the third rod segment 12, and the axial length of the second rod segment 11 is less than the axial length of the third rod segment 12. In specific implementation, the third rod segment 12 with the adjusting head 2 is first inserted into the observation through hole. Then, the operator holds the first rod segment 10 and adjusts the connection between the adjusting head 2 and the adjusting nut.

[0049] Understandably, the first segment 10, with its thinnest outer diameter and longest length, acts as a probe, providing a greater working stroke and better accessibility. This allows the adjusting head 2 on the third segment 12 to reach further positions. The second segment 11, with its medium outer diameter and shortest length, serves as a strength transition and weight reduction section, connecting the thin first segment 10 and the thick third segment 12, and bearing the stress at the cross-sectional change. The third segment 12, with its thickest outer diameter and medium length, provides a strong and stable mounting foundation and torque transmission capability for the connector, preventing loosening or overload damage at the connection. The cooperation of the three segments optimizes the overall mechanical performance of the adjusting rod 1 and makes the adjustment process more flexible and precise.

[0050] In one embodiment, such as Figure 1 and Figure 2 As shown, in order to improve the structural strength between the first rod segment 10 and the second rod segment 11, the surface of the first rod segment 10 and the surface of the second rod segment 11 are connected by a beveled transition. In specific implementation, the design of this beveled transition connection can further disperse the stress concentration at the connection between the first rod segment 10 and the second rod segment 11 with a smaller diameter, avoid structural damage caused by stress concentration, and improve the overall strength and reliability of the adjusting rod 1.

[0051] In one embodiment, such as Figure 1 and Figure 2 As shown, in order to improve the structural strength between the second segment 11 and the third segment 12, a stepped transition connection is made between the surfaces of the second segment 11 and the third segment 12. In specific implementation, the design of this stepped transition connection can make the connection between the second segment 11 and the third segment 12 more stable, effectively withstand the stress changes caused by the difference in rod diameter, further enhance the structural strength and stability of the adjusting rod 1, and ensure that it will not loosen or be damaged due to connection problems during the adjustment process.

[0052] In one embodiment, such as Figure 1 and Figure 2 As shown, the first rod segment 10 is also provided with a radial through hole 100, which is used for inserting an auxiliary rotating rod. When the motion adjustment device extends into the bearing housing and connects with the adjusting nut, the radial through hole 100 is located outside the bearing housing. In specific implementation, when the motion adjustment device needs to extend into the bearing housing and connect with the adjusting nut, since the first rod segment 10 is provided with a radial through hole 100 and the through hole is located outside the bearing housing at this time, the operator can insert the auxiliary rotating rod into the radial through hole 100 and rotate the auxiliary rod to drive the entire adjusting rod 1 to rotate. This makes it easier and less strenuous to complete the connection operation between the adjusting head 2 and the adjusting nut, improving the efficiency and convenience of adjustment.

[0053] In one embodiment, such as Figure 1 and Figure 2 As shown, the first rod segment 10 is also provided with a positioning pin 101. The positioning pin 101 is located on the side of the radial through hole 100 away from the adjusting head 2. In specific implementation, the positioning pin 101 can assist the operator in positioning the operation.

[0054] In one specific embodiment, a feasible structure for the adjusting head 2 is further provided. The adjusting head 2 is integrally formed with the adjusting rod 1. The end face of the adjusting head 2 away from the adjusting rod 1 is provided with an adjusting groove for the insertion of the adjusting nut. The shape of the adjusting groove matches that of the adjusting nut, that is, the groove cross-section matches the outer diameter cross-section of the adjusting nut, and the groove depth matches the height of the adjusting nut. For example, when the adjusting nut is a hexagonal nut, the groove cross-section is hexagonal. In specific implementation, the shape of the adjusting groove is precisely matched with the adjusting nut of a specific type of turbine flyweight, which can transmit reliable torque.

[0055] In one specific embodiment, such as Figures 1 to 4 As shown, to improve the accuracy of adjustment and reduce the problem of large differences in adjustment results among different personnel due to the lack of quantitative tools and reliance on manual experience during the adjustment process, the motion adjustment device also includes a dial 3. The dial 3 is sleeved on the outside of the adjustment rod 1, and the rotation of the dial 3 is independent of the rotation of the adjustment rod 1. The dial 3 includes a mounting ring and a dial 3 body. The mounting ring is fixed to the first rod segment 10 of the adjustment rod 1, and the dial 3 body is rotatably connected to the mounting ring through a bearing. When the motion adjustment device extends into the bearing housing and connects with the adjustment nut, the dial 3 is located in the bearing housing. Outside the bearing housing; in specific implementation, when the motion adjustment device extends into the bearing housing and connects with the adjusting nut, since the scale 3 is located outside the bearing housing, the operator can clearly see the scale on the scale 3. During the adjustment process, the adjustment rod 1 rotates, driving the adjustment head 2 to cooperate with the adjusting nut for adjustment, while the operator can keep the scale 3 relatively stationary. The operator can accurately control the adjustment amount according to the scale 3 corresponding to the rotation of the adjustment rod 1, no longer relying entirely on hand feel and experience for adjustment, effectively reducing the difference in adjustment results between different personnel, and greatly improving the accuracy of adjustment.

[0056] Understandably, this embodiment integrates the dial 3 onto the adjusting rod 1, introducing an angle dial 3 with precise graduations. This transforms the rotation adjustment from an "estimated" amount to a "precise reading," creating a self-stabilizing tool capable of precise angle control within a narrow opening. This achieves "online, precise" adjustment, quantifying, refining, and standardizing the adjustment of the flyweight, eliminating reliance on personal experience. Furthermore, the operator, outside the bearing housing, controls the rotation of the adjusting nut inside the flyweight by observing the angle reading on the dial 3. This transforms an experience-based operation dependent on internal spatial awareness and tactile feedback into a standardized, externally observable process.

[0057] In one embodiment, the dial 3 is a transparent dial 3, that is, the dial 3 itself is transparent, but the scale is colored, and the scale is divided into equal angles (for example, one line every 1° or 5°). In specific implementation, the choice of transparent material also avoids visual errors in the rotation of the adjustment rod 1 that may be caused by the dial 3 being blocked. It can use certain parts on the outer wall of the bearing housing as a scale reference to ensure that each adjustment is based on the most accurate reading.

[0058] In one embodiment, such as Figure 1 and Figure 3 As shown, for convenient handheld operation, the motion adjustment device also includes a handle assembly 4; the handle assembly 4 includes a first handle 40 and a second handle 41; the first handle 40 is detachably mounted on the adjustment rod 1, wherein the outer wall of a portion of the first segment 10 of the adjustment rod 1 may be provided with threads, and two fastening bolts are screwed onto the threads, and the first handle 40 can be fastened to the adjustment rod 1 by these two fastening bolts; the second handle 41 is detachably mounted on the dial 3, wherein the second handle 41 can be fastened to the edge of the dial 3 by bolts or other fasteners, and the second handle 41 is preferably T-shaped or L-shaped; in specific implementation, when handheld operation of the motion adjustment device is required, the operator can install the first handle 40 onto the adjustment rod 1 and the second handle 41 onto the dial 3. By holding the first handle 40, the operator can easily rotate the adjusting rod 1, which drives the adjusting head 2 to cooperate with the adjusting nut for adjustment; at the same time, holding the second handle 41 can keep the scale 3 relatively stationary, making it easy for the operator to clearly observe the scale 3 corresponding to the rotation of the adjusting rod 1, thereby accurately controlling the adjustment amount.

[0059] Based on the above embodiments, such as Figure 1As shown, in this embodiment, the first handle 40 is located on the side of the dial 3 away from the bearing housing; the first handle 40 includes a handle ring 400 and a strip-shaped grip 401; the handle ring 400 is detachably sleeved on the adjusting rod 1; the strip-shaped grip 401 is connected and fixed to the handle ring 400, and along the axial direction of the adjusting rod 1, the projection of the strip-shaped grip 401 on the dial 3 is a long strip-shaped projection, which can act as an indicator needle on the dial 3. The strip-shaped grip 401 is T-shaped or L-shaped, and the strip-shaped grip 401 is arranged upwards, that is, the strip-shaped grip 401 forms a 70-90° angle with the pointer of the dial 3. The included angle facilitates observation of the rotation angle. In specific implementation, the first handle 40 is positioned on the side of the dial 3 away from the bearing housing. This layout design provides operators with more ample operating space, effectively preventing misoperation due to limited space during operation. Furthermore, when the operator holds the strip handle 401, the projection of the strip handle 401 on the dial 3 is a long strip, which can serve as an indicator to provide observation guidance for the operator. It also prevents the first handle 40 from being obstructed when the adjusting rod 1 is rotated, making it convenient for use and observation.

[0060] In another possible embodiment, the first handle 40 may also be a handwheel or a ratchet wrench.

[0061] In one specific embodiment, to save the operator's physical strength, the motion adjustment device further includes a drive mechanism, which includes a steering motor and a motor controller. The output end of the steering motor is fixedly connected to the adjusting rod 1. The steering motor is a micro motor fixed on the device, and its output shaft is connected to the upper end of the adjusting rod 1 through a reduction mechanism (e.g., through a gear set or coupling). This motor is used to drive the adjusting rod 1 to rotate precisely. The motor can be a stepper motor, a servo motor, or other types of micro geared motors to achieve high-precision angle control. The motor controller is a control unit electrically connected to the steering motor. It receives operating commands (such as rotation direction and angle value) and controls the motor to precisely execute the corresponding rotation. The motor controller can be a simple local control box or a smart terminal that can be remotely accessed via the factory network. The motor controller can integrate simple buttons and a display screen, and can also support wireless transmission and communication with external smart terminals (such as tablets and dedicated handheld devices) via Bluetooth / Wi-Fi. Of course, the control signal can be transmitted via wired connection to achieve more advanced control and data recording. In specific implementation, the first handle 40 can be detached and the steering motor can be controlled by the motor controller to perform rotation output action, realizing the upgrade from manual to electric and automatic. The system can receive digital commands and perform high-precision angle rotation, completely eliminating human error in manual operation and realizing the digitalization and programming of the adjustment process.

[0062] Understandably, operators outside the bearing housing only need to input the target angle value on the controller, and the device can automatically complete precise rotation. Compared to manual quantitative adjustment, this represents a higher level of intelligence. Upgraded to an electric drive system consisting of a steering motor and controller, it achieves ultimate adjustment precision and automation. It not only eliminates human error but also enables remote control and data recording of the adjustment operation, providing support for the digital and intelligent operation and maintenance of power plants. The electric drive method significantly reduces the labor intensity of operators, achieving "one-button operation" and making the adjustment process easier and more efficient.

[0063] It should be noted that the manual and electric modes provided in this embodiment are only different in terms of driving method. Those skilled in the art can switch between driving modes according to actual needs.

[0064] A second aspect of the present invention provides a steam turbine, comprising:

[0065] The bearing housing has a housing body, an end cover and a transparent sealing component. The end cover is detachably installed on the housing body to enclose and form the bearing housing. The end cover has an observation hole. The transparent sealing component is detachably installed on the end cover and seals the observation hole.

[0066] The flyweight is installed inside the bearing housing, and the adjusting nut of the flyweight is arranged coaxially with the observation through hole.

[0067] The first aspect is the motion adjustment device, which is inserted into the bearing housing through the observation hole and connected to the adjusting nut.

[0068] In the operation of this embodiment, when it is necessary to adjust the action of the flyweight, the operator only needs to remove the transparent sealing part from the observation hole, then insert the action adjustment device into the bearing box through the observation hole, and connect the adjustment head 2 of the action adjustment device to the adjustment nut of the flyweight. During the adjustment process, the operator holds the second handle 41 to keep the scale 3 relatively stationary, and can clearly observe the scale 3 corresponding to the rotation of the adjustment rod 1, thereby accurately controlling the adjustment amount and ensuring the stable and safe operation of the steam turbine.

[0069] Based on the above description of the mechanical fly hammer's motion adjustment device (first aspect) and the steam turbine (second aspect), a steam turbine adjustment method will be given below, including the following steps:

[0070] S1. Preparation: The entire unit is shut down to the turning gear position, and the on-site safety measures are confirmed to be in place.

[0071] S2. Device in place: Without removing the end cover of the bearing housing, remove the transparent sealing piece to connect the observation hole with the outside, and insert the first aspect of the action adjustment device into the observation hole until it is completely fitted into the adjusting nut of the fly hammer.

[0072] S3. Quantitative Rotation Adjustment: Based on the deviation between the overspeed test results and the target speed, calculate the angle that needs to be adjusted (this angle-speed correspondence can be obtained in advance through testing, calculation, or drawings; the turbine factory drawings have technical specifications, for example, for our factory's turbine, a 10° clockwise adjustment increases the fly hammer's operating speed by 35 revolutions; use this as a reference to adjust the deviation angle); then the operator holds the second hand handle 41 and manually or electrically rotates it in the required direction and at the required angle (clockwise usually increases the operating speed, counterclockwise decreases it).

[0073] It should be noted that in this embodiment, the operator only needs to observe the movement of the handle reference mark on the scale 3 and stop rotating it to the pre-calculated target angle value. This achieves "quantitative" adjustment. In manual mode: the operator keeps the second handle 41 stable, and can use the first handle 40 to rotate the operating rod 1 and make quantitative adjustments by observing the scale 3. In electric mode: the operator keeps the second handle 41 stable, sets the angle value to be adjusted on the motor controller (for example, 15° clockwise), starts the controller, and the steering motor will automatically drive the adjusting rod 1 to rotate, automatically stopping when the rotation reaches the preset angle.

[0074] S4. Device Removal: After adjustment, remove the device vertically upwards.

[0075] S5. Verification: Verification of starting the unit for overspeed testing.

[0076] Understandably, the essence of the proposed method is that the operator operates the adjusting rod 1 outside the bearing housing and controls the rotation of the adjusting nut inside the fly hammer by observing the angle reading of the dial 3. This transforms an experience-based operation that relies on internal spatial sense and tactile feedback into a standard procedure that can be externally observed and quantified.

[0077] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0078] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

[0079] Finally, it should be noted that in this paper, relational terms such as first and second are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations.

Claims

1. A motion adjustment device for a mechanical flying hammer, characterized in that, An adjusting rod and adjusting head are included for extending into the bearing housing through the observation hole and connecting to the adjusting nut of the flyweight; The outer diameter of the adjusting rod and the outer diameter of the adjusting head are both smaller than the observation through hole; The axial length of the adjusting rod is greater than the distance between the bearing housing and the inner wall of the bearing housing; The adjusting head is fixedly connected to one end of the adjusting rod. The end face of the adjusting head away from the adjusting rod is provided with an adjusting groove for the adjusting nut to be inserted. The adjusting groove matches the shape of the adjusting nut.

2. The motion adjustment device according to claim 1, characterized in that, The adjusting rod includes a first rod segment, a second rod segment, and a third rod segment connected in sequence; The diameter of the first rod segment is smaller than the diameter of the second rod segment, the diameter of the second rod segment is smaller than the diameter of the third rod segment, and the adjusting head is fixedly connected to one end of the third rod segment; The axial length of the first segment is greater than the axial length of the second segment and the axial length of the third segment, and the axial length of the second segment is less than the axial length of the third segment.

3. The motion adjustment device according to claim 2, characterized in that, The surfaces of the first and second segments are connected by a beveled transition.

4. The motion adjustment device according to claim 2, characterized in that, The surface of the second segment and the surface of the third segment are connected by a stepped transition.

5. The motion adjustment device according to claim 2, characterized in that, The first rod segment is also provided with a radial through hole, which is used for inserting a rod that assists in rotation; When the motion adjustment device extends into the bearing housing and connects with the adjusting nut, the radial through hole is located outside the bearing housing.

6. The motion adjustment device according to claim 1, characterized in that, The motion adjustment device also includes a dial; The dial is sleeved outside the adjusting rod, and the rotation of the dial is independent of the rotation of the adjusting rod; When the motion adjustment device extends into the bearing housing and connects with the adjusting nut, the dial is located outside the bearing housing.

7. The motion adjustment device according to claim 6, characterized in that, The motion adjustment device also includes a handle assembly; The handle assembly includes a first handle and a second handle; The first handle is detachably mounted on the adjusting rod, and the second handle is detachably mounted on the dial.

8. The motion adjustment device according to claim 7, characterized in that, The first handle is located on the side of the dial away from the bearing housing; The first handle includes a handle ring and a strip-shaped grip; the handle ring is detachably sleeved on the outside of the adjusting rod; the strip-shaped grip is connected and fixed to the handle ring, and along the axial direction of the adjusting rod, the projection of the strip-shaped grip on the scale is a long strip-shaped projection.

9. The motion adjustment device according to claim 1, characterized in that, The motion adjustment device further includes a drive mechanism, the output end of which is connected and fixed to the adjustment rod, and the drive mechanism is used to drive the adjustment rod to rotate.

10. A steam turbine, characterized in that, include: A bearing housing, comprising a housing body, an end cap, and a transparent sealing element, wherein the end cap is detachably mounted on the housing body to enclose and form the bearing housing, the end cap is provided with an observation through hole, and the transparent sealing element is detachably mounted on the end cap and sealably covers the observation through hole; A flying hammer, which is installed inside the bearing housing, and the adjusting nut of the flying hammer is arranged coaxially with the observation through hole; The motion adjustment device according to any one of claims 1 to 9, wherein the motion adjustment device is inserted into the bearing housing through the observation through hole and connected to the adjusting nut.

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