Calibrating device for upper rack of hydraulic generator

Abstract

The utility model relates to the technical field of hydro-generators, and discloses a hydro-generator upper rack calibration device which comprises a plate body, an adjusting bolt, a fixing bolt and a fulcrum bolt, and the adjusting bolt, the fixing bolt and the fulcrum bolt penetrate through the plate body. The plate body is fixed on a stator top ring through the fixing bolts; the adjusting bolt is located on the side, close to the upper rack supporting arm, of the fixing bolt, and the fulcrum bolt is located on the other side of the fixing bolt, namely the side, close to the machine base wall, of the fixing bolt. The number of the devices corresponds to that of the upper rack supporting arms, multiple sets of devices are matched for use, the structure is simple, use is convenient, displacement amplitude and direction are easier to control, assistance of other large equipment is not needed, and manpower and material resources are effectively saved.

Description

Technical Field

[0001] The utility model relates to the technical field of hydro-generators, and provides a calibration device for the upper frame of a hydro-generator. Background Art

[0002] Hydro-generator units are one of the core equipment of hydropower stations, and their installation accuracy directly affects the power generation efficiency and the safe operation of the equipment. During the installation and maintenance process, it is crucial to ensure the central alignment of each component, especially key components such as the stator and rotor. As an important part of the structure of a hydro-generator, the upper frame is large in volume and heavy in weight. A tiny central deviation may lead to huge operation risks under the amplification effect. Therefore, the accuracy of its horizontal and central correction plays a decisive role in ensuring the dynamic balance of the unit, reducing vibration, improving operation efficiency, and extending the equipment life. Therefore, a device that can calibrate quickly and accurately is needed to ensure the correct alignment of the upper frame center.

[0003] Traditional calibration methods for the upper frame of hydro-generators mainly rely on adjustment by jacks. The jacks are placed between the support arms of the upper frame and the concrete air duct, and the center of the upper frame is adjusted by adjusting the jacks; or the jacks are placed at the support points of the upper frame. The jacks are lifted to make the upper frame slightly separate from the support points, and the height of the jacks is adjusted to make the upper frame displace in the horizontal direction, thereby adjusting the center of the upper frame.

[0004] However, the traditional calibration method for the upper frame of hydro-generators is relatively complex, requiring operators to have high coordination and technical capabilities and cooperate with each other, which will cause too long calibration time and inconvenient use; the method of adjusting the upper frame by jacks is greatly affected by human factors and environmental conditions, and it is difficult to achieve very precise displacement control, which may lead to slight deviations between the final position of the upper frame center and the expectation; if the position of the jacks is placed improperly or too much force is used, the upper frame may be damaged, resulting in additional maintenance and replacement costs; and sudden force changes during the operation process may cause the upper frame to be unstable or even collapse, causing danger. Summary of the Utility Model

[0005] In order to solve the above technical problems, the utility model provides a calibration device for the upper frame of a hydro-generator to perform calibration operations on the upper frame of the hydro-generator.

[0006] The calibration device is fixed on the stator top ring through fixing bolts, the fulcrum bolts at the lower end of the calibration device are tightened and abutted against the machine base wall as a fulcrum, and the adjusting bolts at the upper end of the calibration device are rotated to push the support arm of the upper frame, so that the upper frame displaces to achieve the calibration function.

[0007] The plate body is an elastic plate body. By adjusting the tightening degree of the fulcrum bolt, the plate body undergoes different degrees of deformation, thereby changing the magnitude of the force exerted by the adjusting bolt to support the upper frame arm. Then, by rotating the adjusting bolt, it is easier to control the displacement of the upper frame in the horizontal direction, achieving smooth adjustment of the upper frame in the horizontal direction.

[0008] This device has the advantages of simple structure, convenient use, easier control of the displacement amplitude and direction, improved installation accuracy of the upper frame, increased operation stability of the unit, no need for other large equipment assistance, and effective savings in manpower and material resources.

[0009] The specific solution of the present utility model is: a calibration device for the upper frame of a hydrogenerator, including a plate body, an adjusting bolt and a fulcrum bolt passing through the threaded hole on the plate body, and a fixing bolt passing through the through hole on the plate body;

[0010] The stator top ring is provided with a threaded hole, and the plate body is fixed on the stator top ring through the fixing bolt;

[0011] The adjusting bolt is located on one side of the fixing bolt close to the upper frame arm, and the fulcrum bolt is located on the other side of the fixing bolt, that is, on the side close to the machine base wall.

[0012] Further, the adjusting bolt passes through the threaded hole on the plate body, and the tail of the adjusting bolt fits with the upper frame arm, that is, the adjusting bolt passes through the threaded hole on the plate body and is tightened, and the tail of the adjusting bolt abuts against the upper frame arm;

[0013] The fulcrum bolt passes through the threaded hole on the plate body, and the tail of the fulcrum bolt fits with the machine base wall, that is, the fulcrum bolt passes through the threaded hole on the plate body and is tightened, and the tail of the fulcrum bolt abuts against the machine base wall, playing the role of a fulcrum.

[0014] Further, a spacer is provided between the plate body and the stator top ring, and the spacer is provided with a through hole adapted to the fixing bolt.

[0015] Furthermore, the fixing bolt passes through the through hole on the plate body and the through hole on the spacer, and is screwed into the threaded hole on the stator top ring, and the plate body is in a fixed state relative to the stator top ring, that is, the fixing bolt is tightened to fix the plate body on the stator top ring.

[0016] Further, the adjusting bolt and the fulcrum bolt are located on the longitudinal center line of the plate body.

[0017] Furthermore, the distance between the fulcrum bolt and the fixing bolt is less than the distance between the adjusting bolt and the fixing bolt.

[0018] Furthermore, the vertical distance from the adjusting bolt to the connecting line between the fixing bolts is 2-5 times the vertical distance from the fulcrum bolt to the connecting line between the fixing bolts.

[0019] Further, the number of the fixing bolts is one or more.

[0020] Furthermore, the fixing bolts are symmetrically arranged on both sides of the longitudinal center line of the plate body, and the connecting line between the fixing bolts is a straight line perpendicular to the longitudinal center line of the plate body.

[0021] Further, the plate body is an elastic plate body. By adjusting the tightening degree of the fulcrum bolt, the plate body undergoes different degrees of deformation, so as to change the magnitude of the force of the adjusting bolt supporting the upper frame arm. Then, by rotating the adjusting bolt, it is easier to control the displacement of the upper frame in the horizontal direction, realizing the smooth adjustment of the upper frame in the horizontal direction.

[0022] The utility model has the following beneficial effects:

[0023] The calibration device is fixed on the stator top ring through the fixing bolts. Tighten the fulcrum bolt at the lower end of the calibration device and press it against the seat wall as a fulcrum. Rotate the adjusting bolt at the upper end of the calibration device to push the upper frame arm, causing the upper frame to displace and realizing the calibration function.

[0024] The plate body therein is an elastic plate body. By adjusting the tightening degree of the fulcrum bolt, the plate body undergoes different degrees of deformation, so as to change the magnitude of the force of the adjusting bolt supporting the upper frame arm. Then, by rotating the adjusting bolt, it is easier to control the displacement of the upper frame in the horizontal direction, realizing the smooth adjustment of the upper frame in the horizontal direction.

[0025] This device has the advantages of simple structure, convenient use, easier control of the displacement amplitude and direction, improved installation accuracy of the upper frame, increased operation stability of the unit, no need for other large equipment assistance, and effective saving of manpower and material resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only the embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained according to the provided drawings without creative efforts.

[0027] Figure 1 It is an overall sectional view of a hydro-generating unit.

[0028] Figure 2 It is a top view of the upper frame of a hydro-generator.

[0029] Figure 3It is a side sectional view of an upper frame calibration device for a hydrogenerator.

[0030] Figure 4 It is a front structural view of an upper frame calibration device for a hydrogenerator.

[0031] In the figure: 1. Upper frame, 11. Upper frame support arm, 2. Stator, 21. Stator top ring, 22. Frame wall, 3. Fixed bolt, 4. Fulcrum bolt, 5. Adjusting bolt, 6. Plate body, 7. Cushion plate, 81. Threaded hole corresponding to the fulcrum bolt on the plate body, 82. Threaded hole corresponding to the adjusting bolt on the plate body, 83. Threaded hole on the stator top ring, 91. Through hole corresponding to the fixed bolt on the plate body, 92. Through hole on the cushion plate. Specific implementation mode

[0032] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, in which the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions from beginning to end. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation of the present invention.

[0033] Embodiment 1

[0034] As Figure 1 shown is an overall sectional view of a hydrogenerator set. The hydrogenerator includes a stator 2 and an upper frame 1 provided on the upper side of the stator 2. The upper frame 1 can move relative to the stator. A stator top ring 21 is provided at a position on the outer wall of the stator close to the upper frame 1, and the outer wall of the stator is the frame wall 22.

[0035] As Figure 2 shown is a top view of an upper frame of a hydrogenerator. The upper frame 1 is provided with a plurality of upper frame support arms 11. The number of the upper frame calibration devices of the present invention corresponds to the number of the upper frame support arms 11. Multiple sets of calibration devices are used in cooperation to meet the adjustment of the upper frame 1 in all directions in the horizontal direction, and it is easy to control the displacement direction of the upper frame, so as to achieve the purpose of calibration.

[0036] As Figure 3 shown is a side sectional view of an upper frame calibration device for a hydrogenerator of the present invention, which includes a plate body 6 and an adjusting bolt 5, a fixed bolt 3 and a fulcrum bolt 4 passing through the plate body 6; the plate body 6 is fixed on the stator top ring 21 through the fixed bolt 3; the adjusting bolt 5 is located on the side of the fixed bolt 3 close to the upper frame support arm 11, and the fulcrum bolt 4 is located on the other side of the fixed bolt 3, that is, on the side of the fixed bolt 3 close to the frame wall 22.

[0037] The plate body is provided with a threaded hole 82 adapted to the adjusting bolt 5, a threaded hole 81 adapted to the fulcrum bolt 4, and a through hole 91 adapted to the fixing bolt 3. The adjusting bolt 5 passes through the threaded hole 82 on the plate body 6 adapted to the adjusting bolt 5, and the tail of the adjusting bolt is in contact with the upper frame support arm 11, that is, the tail of the adjusting bolt abuts against the upper frame support arm; the fulcrum bolt 4 passes through the threaded hole 81 on the plate body 6 adapted to the fulcrum bolt, and the tail of the fulcrum bolt is in contact with the machine base wall 22, that is, the fulcrum bolt passes through the threaded hole on the plate body and is tightened, and the tail of the fulcrum bolt abuts against the machine base wall, playing the role of a fulcrum.

[0038] A spacer 7 is provided between the plate body and the stator top ring. The spacer 7 is provided with a through hole 92 adapted to the fixing bolt 3, and the stator top ring is provided with a threaded hole 83 adapted to the fixing bolt; the fixing bolt 3 passes through the through hole 91 corresponding to the fixing bolt on the plate body 6 and the through hole 92 on the spacer 7, and is screwed into the threaded hole 83 on the stator top ring 21. The head of the fixing bolt is in contact with the plate body, and the plate body 6 is in a fixed state relative to the stator top ring 21, that is, the fixing bolt is tightened to fix the plate body on the stator top ring.

[0039] As Figure 4 Shown is the front structure diagram of a calibration device for the upper frame of a hydrogenerator of the present utility model. The adjusting bolt 5 and the fulcrum bolt 4 are located on the longitudinal center line of the plate body. The distance between the fulcrum bolt 4 and the fixing bolt 3 is less than the distance between the adjusting bolt 5 and the fixing bolt 3. The vertical distance from the adjusting bolt to the connecting line between the fixing bolts is 3 times the vertical distance from the fulcrum bolt to the connecting line between the fixing bolts. The number of fixing bolts 3 is two, and the fixing bolts 3 are symmetrically arranged on both sides of the longitudinal center line of the plate body 6, and the connecting line between the fixing bolts 3 is a straight line perpendicular to the longitudinal center line of the plate body.

[0040] The plate body 6 is an elastic plate body. By adjusting the tightening degree of the fulcrum bolt 4, the plate body undergoes different degrees of deformation, thereby changing the magnitude of the force of the adjusting bolt 5 supporting the upper frame support arm 11. Then, by rotating the adjusting bolt 5, it is easier to control the displacement of the upper frame in the horizontal direction, realizing smooth adjustment of the upper frame in the horizontal direction.

[0041] In this embodiment, the calibration device is fixed on the stator top ring by fixing bolts. The fulcrum bolt at the lower end of the calibration device is tightened and abuts against the frame wall as a fulcrum. The adjusting bolt at the upper end of the calibration device is rotated to push the upper frame arm, causing the upper frame to displace and realizing the calibration function. The plate body therein is an elastic plate body. By adjusting the tightening degree of the fulcrum bolt, the plate body undergoes different degrees of deformation, thereby changing the magnitude of the force exerted by the adjusting bolt to support the upper frame arm. Then, by rotating the adjusting bolt, it is easier to control the displacement of the upper frame in the horizontal direction, achieving smooth adjustment of the upper frame in the horizontal direction. This device has the advantages of simple structure, convenient use, easier control of the displacement amplitude and direction, improved installation accuracy of the upper frame, increased operation stability of the unit, no need for other large equipment assistance, and effective savings in manpower and material resources.

[0042] Embodiment 2

[0043] The plate body in the upper frame calibration device of the hydro-generator is of a symmetrical structure, and the plate body can be an elastic plate body or a rigid plate body. To achieve better adjustment effects, through experiments, the most preferred elasticity is obtained, and the elasticity of the plate body is set to a specific elasticity to avoid a decrease in the adjustment ability due to excessive elasticity.

[0044] The fixing bolts are tightened to fix the plate body on the stator top ring; the adjusting bolt 5 passes through the threaded hole 82 on the plate body 6 that is adapted to the adjusting bolt 5, and the tail of the adjusting bolt abuts against the upper frame arm 11, that is, the tail of the adjusting bolt abuts on the upper frame arm; the fulcrum bolt 4 passes through the threaded hole 81 on the plate body 6 that is adapted to the fulcrum bolt, and the tail of the fulcrum bolt abuts against the frame wall 22, that is, the fulcrum bolt passes through the threaded hole on the plate body and is tightened, and the tail of the fulcrum bolt abuts on the frame wall to act as a fulcrum.

[0045] By adjusting the tightening degree of the fulcrum bolt 4, the plate body undergoes different degrees of deformation, thereby changing the magnitude of the force exerted by the adjusting bolt 5 to support the upper frame arm 11. Then, by rotating the adjusting bolt 5, it is easier to control the displacement amplitude of the upper frame in the horizontal direction, achieving smooth adjustment of the upper frame in the horizontal direction.

[0046] In this embodiment, by setting a plate body with a specific elasticity, while improving the adjustment ability, the device can also play a certain role in vibration reduction to eliminate high frequencies, making the hydro-generator operate more stably and reducing the impact on power generation efficiency and equipment life caused by vibration.

[0047] The utility model fixes the calibration device on the stator top ring through fixing bolts, tightens the fulcrum bolt at the lower end of the calibration device, and presses it against the frame wall as a fulcrum. Rotate the adjusting bolt at the upper end of the calibration device to push the upper frame arm, causing the upper frame to displace and achieving the calibration function. The plate body is an elastic plate body. By adjusting the tightening degree of the fulcrum bolt, the plate body undergoes different degrees of deformation, thereby changing the magnitude of the force exerted by the adjusting bolt to support the upper frame arm. Then, by rotating the adjusting bolt, it is easier to control the displacement of the upper frame in the horizontal direction, realizing smooth adjustment of the upper frame in the horizontal direction. This device has the advantages of simple structure, convenient use, easier control of the displacement amplitude and direction, improving the installation accuracy of the upper frame, increasing the operation stability of the unit, eliminating the need for other large equipment assistance, and effectively saving manpower and material resources.

[0048] Embodiment 3

[0049] During the calibration process of the upper frame of a hydrogenerator, when the length of the adjusting bolt is too short to calibrate the upper frame, an adjusting bolt with a longer length can be replaced to increase the adjusted displacement and further calibrate the upper frame.

[0050] The adjusting bolt 5 passes through the threaded hole 82 on the plate body 6 that is adapted to the adjusting bolt 5. The tail of the adjusting bolt is in contact with the upper frame arm 11, that is, the tail of the adjusting bolt presses against the upper frame arm; when replacing an adjusting bolt with a longer length, the tail of the replaced adjusting bolt is in contact with the upper frame arm 11, that is, the tail of the replaced adjusting bolt presses against the upper frame arm; the fulcrum bolt 4 passes through the threaded hole 81 on the plate body 6 that is adapted to the fulcrum bolt. The tail of the fulcrum bolt is in contact with the frame wall 22, that is, the fulcrum bolt passes through the threaded hole on the plate body and is tightened, and the tail of the fulcrum bolt presses against the frame wall to play the role of a fulcrum.

[0051] By adjusting the tightening degree of the fulcrum bolt 4, the plate body undergoes different degrees of deformation, thereby changing the magnitude of the force exerted by the adjusting bolt 5 to support the upper frame arm 11. Then, by rotating the adjusting bolt 5, it is easier to control the displacement of the upper frame in the horizontal direction, realizing smooth adjustment of the upper frame in the horizontal direction.

[0052] In this embodiment, an adjusting tool can be selectively added to the tail of the adjusting bolt, which can increase the adjusted displacement during the calibration of the upper frame and prevent the upper frame from not being calibrated due to the too short length of the adjusting bolt.

[0053] The utility model fixes the calibration device on the stator top ring through fixing bolts, tightens the fulcrum bolt at the lower end of the calibration device, and presses it against the frame wall as a fulcrum. Rotate the adjusting bolt at the upper end of the calibration device to push the upper frame arm, causing the upper frame to displace and realizing the calibration function. The plate body is an elastic plate body. By adjusting the tightening degree of the fulcrum bolt, the plate body undergoes different degrees of deformation, thereby changing the magnitude of the force exerted by the adjusting bolt to support the upper frame arm. Then, rotate the adjusting bolt, making it easier to control the displacement of the upper frame in the horizontal direction and achieving smooth adjustment of the upper frame in the horizontal direction. This device has the advantages of simple structure, convenient use, easier control of the displacement amplitude and direction, improved installation accuracy of the upper frame, increased operating stability of the unit, no need for other large equipment assistance, and effective saving of manpower and material resources.

[0054] Embodiment 4

[0055] As Figure 4 shown is the front structure diagram of a calibration device for the upper frame of a hydrogenerator of the present utility model. The adjusting bolt 5 and the fulcrum bolt 4 are located on the longitudinal center line of the plate body, and the adjusting bolt 5 and the fulcrum bolt 4 are located on both sides of the fixing bolt 3. The distance between the fulcrum bolt 4 and the fixing bolt 3 is less than the distance between the adjusting bolt 5 and the fixing bolt 3. The vertical distance from the adjusting bolt to the connecting line between the fixing bolts is 3 times the vertical distance from the fulcrum bolt to the connecting line between the fixing bolts. The number of fixing bolts 3 is two, and the fixing bolts 3 are symmetrically arranged on both sides of the longitudinal center line of the plate body 6, and the connecting line between the fixing bolts 3 is a straight line perpendicular to the longitudinal center line of the plate body.

[0056] The number of the fixing bolts can be one or more, and the vertical distance from the adjusting bolt to the connecting line between the fixing bolts can be 2 - 5 times the vertical distance from the fulcrum bolt to the connecting line between the fixing bolts, not limited to the number of fixing bolts and the ratio of the vertical distance from the adjusting bolt to the connecting line between the fixing bolts to the vertical distance from the fulcrum bolt to the connecting line between the fixing bolts in the embodiment as Figure 4 shown.

[0057] Since the adjusting bolt 5 and the fulcrum bolt 4 are located on the longitudinal center line of the plate body, and the adjusting bolt 5 and the fulcrum bolt 4 are located on both sides of the fixing bolt 3, and the distance between the fulcrum bolt 4 and the fixing bolt 3 is less than the distance between the adjusting bolt 5 and the fixing bolt 3, when using this calibration device for the upper frame of the hydrogenerator to calibrate the upper frame, this device forms a labor-saving lever. The fulcrum bolt is tightened and pressed against the frame wall as a fulcrum, making the calibration process more labor-saving, without the assistance of other large equipment, effectively saving manpower, and being convenient to use.

[0058] When the number of fixing bolts is two and the vertical distance from the adjusting bolt to the connecting line between the fixing bolts is three times the vertical distance from the fulcrum bolt to the connecting line between the fixing bolts, this embodiment is the most preferred for the upper frame calibration device of this hydrogenerator.

[0059] The utility model fixes the calibration device on the stator top ring through the fixing bolts, tightens the fulcrum bolt at the lower end of the calibration device and presses it against the seat wall as a fulcrum, rotates the adjusting bolt at the upper end of the calibration device, pushes the upper frame arm, and displaces the upper frame to achieve the calibration function. The plate body is an elastic plate body. By adjusting the tightening degree of the fulcrum bolt, the plate body undergoes different degrees of deformation, thereby changing the magnitude of the force exerted by the adjusting bolt to support the upper frame arm. Then, by rotating the adjusting bolt, it is easier to control the displacement of the upper frame in the horizontal direction and achieve smooth adjustment of the upper frame in the horizontal direction. This device has the advantages of simple structure, convenient use, easier control of the displacement amplitude and direction, improved installation accuracy of the upper frame, increased operation stability of the unit, no need for other large equipment assistance, and effective saving of manpower and material resources.

[0060] The above are only the preferred embodiments of the utility model and do not impose any limitations on the utility model. Any simple modifications, changes, and equivalent structural transformations made to the above embodiments based on the technical essence of the utility model still fall within the protection scope of the technical solution of the utility model.

Claims

1. A hydro-generator upper frame calibration device, characterized in that: It includes a plate body, an adjusting bolt and a fulcrum bolt passing through a threaded hole on the plate body, and a fixing bolt passing through a through hole on the plate body; The stator top ring is provided with a threaded hole, and the plate body is fixed on the stator top ring by the fixing bolts; The adjusting bolt is located on one side of the fixing bolt close to the upper frame support arm, and the fulcrum bolt is located on the other side of the fixing bolt, that is, the side close to the base wall.

2. The hydro-generator upper frame calibration device according to claim 1, characterized in that: The adjusting bolt passes through the threaded hole on the plate body, and the tail of the adjusting bolt is in contact with the upper frame support arm; The fulcrum bolt passes through the threaded hole on the plate body, and the tail of the fulcrum bolt is in contact with the base wall.

3. The hydro-generator upper frame calibration device according to claim 1, characterized in that: A backing plate is provided between the plate body and the stator top ring, and a through hole adapted to the fixing bolt is provided on the backing plate.

4. The hydro-generator upper frame calibration device according to claim 3, characterized in that: The fixing bolt passes through the through hole on the plate body and the through hole on the backing plate, and is screwed into the threaded hole on the stator top ring. The plate body is in a fixed state relative to the stator top ring.

5. The hydro-generator upper frame calibration device according to claim 1, characterized in that: The adjusting bolt and the fulcrum bolt are located on the longitudinal center line of the plate body.

6. The hydro-generator upper frame calibration device according to claim 5, characterized in that: The distance between the fulcrum bolt and the fixing bolt is smaller than the distance between the adjusting bolt and the fixing bolt.

7. The hydro-generator upper frame calibration device according to claim 6, characterized in that: The vertical distance between the adjusting bolt and the fixing bolt is 2-5 times the vertical distance between the fulcrum bolt and the fixing bolt.

8. The hydro-generator upper frame calibration device according to claim 1, characterized in that: The number of the fixing bolts is one or more.

9. The hydro-generator upper frame calibration device according to claim 8, characterized in that: The fixing bolts are symmetrically arranged on both sides of the longitudinal center line of the plate body, and the connecting line between the fixing bolts is a straight line perpendicular to the longitudinal center line of the plate body.

10. The hydro-generator upper frame calibration device according to any one of claims 1 to 9, characterized in that: The plate body is an elastic plate body.

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