JP3933727B2 - Servo motor mounting support structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an improvement in a mounting support structure of a servo motor that is installed in a hydroelectric power plant and is directly connected to a generator to control the amount of water flowing into a power generation turbine that rotates the servo motor. The present invention relates to a mounting support structure for a servo motor in which only a load of an axial direction component is always applied without being subjected to a load.
[0002]
[Prior art]
As is well known, the rotational speed control of a power generation turbine or the load control of the above-described generator that rotates a generator installed directly in a hydroelectric power plant is controlled by controlling the amount of water flowing into the power generation turbine. Done. The amount of water flowing into the power generation turbine is controlled by rotating the guide ring by a servo motor that is positioned above the upper cover of the power generation turbine and mechanically connected to the guide ring supported by the upper cover. It is performed by controlling the opening and closing of the guide vane of the water turbine for power generation connected to the guide ring through a link.
[0003]
Therefore, the operation force (thrust) required for the rotation of the guide ring needs to open and close the guide vane against the water pressure received by the guide vane, and therefore, several tons depending on the capacity of the power generation turbine. Servo motors that reach several hundred tons and output this value of thrust are required.
[0004]
Conventionally, a hydraulic servo motor driven by pressure oil is used for all power generation turbines regardless of capacity. However, the hydraulic servo motor outputs the above powerful thrust. In addition to the necessity, not only large-scale and expensive hydraulic equipment such as oil compressors, pressure oil tanks, pressure distribution valves, pressure oil piping, etc. are necessary as ancillary equipment. It has become a problem due to the concern of environmental pollution.
[0005]
Therefore, in recent years, an inexpensive electric servo motor that is driven by an electric motor that does not cause environmental pollution has been developed, and has come to be used in a small-capacity water turbine for power generation. Recently, the capacity of electric servo motors to be manufactured has been gradually increased, and gradually applied to large-capacity water turbines for power generation.
[0006]
FIG. 4 is a plan view illustrating an outline of a conventional mounting support structure of a hydraulic servomotor applied to a vertical shaft turbine for power generation, and illustrating opening / closing control of guide vanes of the vertical shaft turbine.
[0007]
In FIG. 4, 1 is a governor control device, 2 is an actuator, 3 is a pressure distribution valve, and 4 is a pressure oil pipe.
[0008]
Reference numeral 10 denotes a hydraulic servo motor. A servo motor mounting pit liner 6 of a water turbine pit (not shown) on which a vertical axis turbine described later is installed is connected to a pit liner (a left end of a cylinder described later) via a flange 7 with a bolt (not shown). The cylinder 11 which is firmly fixed, the piston 12 provided in the cylinder 11, the piston rod 13 fixed to the piston 12, and the rod end 14 fixed to the tip of the piston rod 13 It is configured.
[0009]
Reference numeral 30 denotes a vertical shaft water turbine for power generation, a casing which is the main body but is not directly related to the present invention, a runner inserted into a space inside the casing, and an upper cover which covers the upper surface and the lower surface of the runner. The lower cover and the like are omitted.
[0010]
31 is a main shaft of the runner, and 32 is a guide ring which is located above the upper cover and supported by the upper cover and is mounted so as to be rotatable about the main shaft 31. A guide ring arm 37 protrudes therefrom. ing. Reference numeral 33 denotes a guide vane, and a guide vane shaft 34 is provided so as to protrude from the upper surface and the lower surface of the guide vane. Although only two are shown in the figure, the guide vanes are guided at equal intervals along the inner peripheral surface of the casing. Ten or more shafts are supported by the vane shaft 34 between the upper cover and the lower cover.
[0011]
Reference numeral 35 denotes a guide vane arm fixed to the upper end of the guide vane shaft 34, and the tip thereof is connected to the guide ring 32 at equal intervals via a guide vane link 36.
[0012]
A servo motor link 40 connects the rod end 14 and the guide ring arm 37 with pins 41 and 42, and the hydraulic servo motor 10 and the guide ring 32 are connected via the servo motor link 40. Is done.
[0013]
  In the above configuration, the vertical axis turbine is controlled by opening / closing control of the guide vane 33.30Control of the amount of inflow water introduced into is performed as follows.
[0014]
That is, the electrical signal output from the governor control device 1 is input to the actuator 2, where it is converted into a mechanical displacement and transmitted to the pressure distribution valve 3, thereby displacing a valve body in the pressure distribution valve (not shown). Although not shown, pressure oil is supplied to the pressure distribution valve 3 from the pressure oil tank via the pressure oil pipe, and the pressure oil is supplied to the pressure oil pipes 4 and 4 according to the displacement of the valve body. Is supplied to the illustrated left or right chamber of the cylinder 11 of the hydraulic servomotor 10 to move the piston 12 to the right or left in the drawing.
[0015]
  The movement of the piston 12 causes the hydraulic servo motor 10 to generate a linear thrust due to the hydraulic pressure, and this thrust is transmitted to the guide ring arm 37 via the piston rod 13, rod end 14, and servo motor link 40. The ring 32 is rotated in the range of an angle a with the chain line L as the center. By the rotation of the guide ring 32, the opening degree of all the guide vanes 33 connected to the guide ring 32 via the guide vane link 36 is controlled from the fully closed state to the fully opened state, and the vertical axis turbine30The amount of inflow water to is controlled to a flow rate corresponding to the opening degree of the guide vane 33.
[0016]
By the way, the base end of the hydraulic servo motor 10 is firmly fixed to the pit liner 6 by the flange 7 and the rod end 14 at the tip thereof is connected to the guide ring 32 via the servo motor link 40. During the opening / closing control of the vane 33, the pin 42 on the guide ring 32 side swings to draw an arcuate locus indicated by a chain line.
[0017]
In this case, the pin 42 can be swung by providing the servo motor link 40, but if the rod end 14 and the guide ring arm 37 are directly connected by the pin 41 without the link 40, the pin 41 Thus, a large lateral load (bending load) in a direction perpendicular to the axial direction (vertical direction in the drawing) is applied to the hydraulic servo motor 10.
[0018]
That is, the servo motor link 40 is interposed in order to absorb the large bending load, but as described above, the thrust output by the hydraulic servo motor 10 during operation is extremely large. As a result, it is not possible to absorb all of the bending load, and a slight bending load acts on the servo motor 10 due to the swing of the pin 42.
[0019]
  The above description is a vertical axis turbine.30The opening degree control of the guide vane 33 during normal operation will be described, but there is an accident in the generator directly connected to the vertical shaft turbine 30 and driven to rotate, or in the power system to which the generator is connected. When this occurs, it is necessary to shut off the load on the generator and simultaneously close the guide vane 33 rapidly.
  When the guide vane 33 is suddenly closed, a change in water pressure occurs between the water turbine runner and the upper cover, and this change in water pressure causes a slight deformation of the upper cover. When this deformation occurs, the guide ring 32 positioned above the upper cover and supported by the upper cover also deforms simultaneously.
[0020]
Moreover, since this deformation occurs during the sudden closing operation of the guide vane 33, a strong bending load in the vertical direction (vertical direction) is applied to the hydraulic servo motor 10 connected to the guide ring 32. That's a big problem.
[0021]
FIG. 5 is an enlarged side cross-sectional view of the servo motor link when used for connecting the hydraulic servo motor 10 and the vertical shaft turbine 30 shown in FIG. 4 to absorb the bending load in such a case. The same parts as those in FIG. 4 are denoted by the same reference numerals.
[0022]
In FIG. 5, reference numeral 40 denotes a servo motor link. The same two rectangular upper plate 44 and lower plate 45 are clamped with bolts and nuts at appropriate intervals, and the upper plate 44 and lower plate 45 are In the vicinity of both ends, holes for connecting the rod end 14 and the guide ring arm 37 by the pins 41 and 42 are formed. The upper plate 44 and the lower plate are formed such that gaps G are formed between the upper surface of the lower plate 45 and the lower surface of the rod end 14 and between the upper surface of the lower plate 45 and the lower surface of the guide ring arm 37, respectively. The distance from 45 is adjusted.
[0023]
As described above, by providing the gap G, the bending load acting on the hydraulic servo motor 10 is absorbed even when the guide ring 32 is deformed and moves up and down or left and right.
[0024]
FIG. 6 is a side view for explaining an outline of a conventional mounting support structure of an electric servo motor applied to a vertical shaft water turbine for power generation, and in order to facilitate understanding, the connection of the electric servo motor to the pit liner is shown. And the connection part with a guide ring arm is shown with sectional drawing.
[0025]
FIG. 7 is a plan view for explaining the opening control of the guide vane of the vertical axis turbine, but the guide vane is omitted. In FIG. 6 and FIG. 7, the same parts as those in FIG.
[0026]
In FIG. 6, 1 is a governor control device, 5 is a servo amplifier, 6 is a pit liner, 8 is a pit liner 6 via a base for connecting an electric servo motor, which will be described later, to the pit liner 6 at its base end. It is an arm that protrudes from.
[0027]
An electric servo motor 20 includes an electric motor 21 as a ball screw driving source, which will be described later, a reduction gear mechanism for reducing the rotation speed of the electric motor 21 and transmitting the rotation to the ball screw, and a mounting seat 26 for the electric servo motor 20. Is projecting from the case of the ball screw portion 23 by extending the ball screw shaft of the ball screw and extending the ball screw shaft of the ball screw. And a rod end 25 fixed to the tip of the ball screw rod 24.
[0028]
The electric servomotor 20 is pivotally supported by a parallel pin 27 on an arm 8 using a mounting seat 26 projecting from a reduction gear mechanism 22 which is the base end thereof, and a rod end 25 is connected to a parallel pin 28. To the guide ring arm 37.
[0029]
Also in this case, a gap G is provided at the connecting portion between the rod end 25 and the guide ring arm 37. This gap G is similar to the gap G in FIG. The ring 32 is provided in consideration of deformation.
[0030]
In FIG. 7, 30 is a vertical shaft water wheel, 32 is a guide ring, and 37 is a guide ring arm.
[0031]
  In the above configuration, the vertical axis turbine introduced by the guide vane opening / closing control by the rotation of the guide ring 3230The control of the amount of inflow water is performed as follows.
  That is, the electric signal output from the governor control device 1 is input to the servo amplifier 5, amplified, and applied to the electric motor 21. As a result, the electric motor 21 rotates forward or backward, and this rotation is decelerated by the reduction gear mechanism 22 to the ball screw portion 23.Built-inThe ball screw nut is transmitted to the ball screw nut, and this ball screw nut is rotated.
[0032]
  The ball screw is a main part of the electric servo motor 20 and is composed of the above-described ball screw nut and a ball screw shaft that is screwed through a large number of balls (steel balls) that are replaced while circulating through the ball screw nut. The rotation of the ball screw nut is converted into a linear motion of a ball screw shaft that is screwed into the ball screw nut and prevented from rotating. An extension of the ball screw shaft in the axial direction is a ball screw rod 24, and a rod end 25 is fixed to the tip of the ball screw rod 24. Therefore, the guide ring arm 37 (guide ring 32) connected to the rod end 25 by the parallel pin 28 is rotated in the range of the angle a centering on the chain line L shown in FIG. The vertical axis water wheel is done30The amount of inflow water is controlled.
[0033]
  In this case, both the parallel pins 27 and 28 must be made to be exactly perpendicular to the rotation surface (horizontal plane) of the guide ring 32 so as to be kept parallel, and as shown in FIG. 37 needs to be connected to the rod end 25 by the parallel pin 28 with a gap G equal to the upper and lower sides thereof, so it takes a long time to determine the mounting position (particularly the height) and the mounting angle of the arm 8 to the pit liner 6. I need.
  Further, as shown by a chain line in FIG. 7, the parallel pin 28 (guide ring 32) swings in an angle range around the chain line L and draws an arc-shaped locus. A horizontal bending load will act. However, the electric servomotor 20 is parallelpin27 is pivotally supported on the arm 8 by the arm 27, so that most of the bending load is parallel.pinAlthough it is absorbed by the rotation around the center 27 and the gap G, it cannot absorb all of the bending load, and the electric servo motor 20 receives a slight bending load.
[0034]
FIG. 8 is a side view for explaining the outline of a conventional mounting support structure different from FIG. 6 of the electric servo motor applied to the vertical shaft turbine, and for easy understanding, the electric servo motor and the guide ring arm. The connecting part is shown in a sectional view.
[0035]
FIG. 9 is a plan view for explaining the opening / closing control of the guide vanes of the vertical axis turbine, but the guide vanes are omitted. 8 and 9, the same parts as those in FIGS. 4, 5, 6, and 7 are denoted by the same reference numerals, and FIGS. 8 and 9 are the hydraulic pressures in FIGS. Since the servo motor is simply replaced with an electric servo motor, detailed description is omitted.
[0036]
8 and 9, 1 is a governor control device, 5 is a servo amplifier, 6 is a pit liner, and 7 is a flange. An electric servo motor 20 includes an electric motor 21, a reduction gear mechanism portion 22, a ball screw portion 23, a ball screw rod 24, a rod end 25, and a mounting seat 26.
[0037]
30 is a vertical shaft turbine, 32 is a guide ring, 37 is a guide ring arm, 40 is a servo motor link, 41 and 42 are pins, and G is a gap.
[0038]
  Vertical shaft turbine in the above configuration30The control of the amount of inflow water introduced into the motor is merely by replacing the hydraulic servo motor 10 in FIG. 4 with the electric servo motor 20, and there is no other difference, so that the description thereof will be omitted. It is the same as the above-mentioned case that some bending load acts at the time of 20 operation | movement.
[0039]
[Problems to be solved by the invention]
In the above, two different types of mounting support structures for servo motors (hydraulic servo motors and electric servo motors) have been described in detail. In these mounting support structures, means for absorbing the bending load acting during the operation of each servo motor (connection via a servo motor link or provision of a gap, without fixing the servo motor to the pit liner) Etc., which are pivotably mounted by a parallel pin.
[0040]
For this reason, the number of components is complicated and the structure is complicated, and a large amount of labor and time is required for positioning, clearance setting, centering or leveling work, etc., but the bending load is completely absorbed. As a result, a slight bending load was applied to the servo motor, resulting in the following problems.
[0041]
That is, when a bending load is applied, in the case of a hydraulic servomotor, friction and wear between the cylinder and the piston or piston rod increase, and the life is shortened.
In the case of an electric servo motor, it is a particular problem. A ball screw in which a ball screw nut and a ball screw shaft are screwed through a large number of circulating steel balls has a sufficient axial strength but a bending load. May cause imbalance in load sharing, causing galling or sticking between the steel ball and the ball screw nut or ball screw shaft, resulting in insufficient transmission of thrust. As a result, the lifespan is shortened.
[0042]
The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a servo motor mounting support structure in which only a load of an axial component is always applied without receiving a bending load during operation of the servo motor. Is to provide.
[0043]
[Means for Solving the Problems]
  To achieve the above objectiveThe present invention relates to a servo motor mounting support structure in which a pit liner of a water turbine pit in which a power generation water turbine is installed and a guide ring of the power generation water turbine are connected via a servo motor. A rod end having a first through hole formed therein, a guide ring arm connected to the guide ring and having a second through hole formed at a tip thereof, and the rod end and the guide ring arm are connected to each other at both ends. A servo motor link having a through-hole, a pair of pins connecting each of the through-holes of the servo motor link, the first through-hole, and the second through-hole, the first through-hole In addition, the inner surface of the second through hole is formed in a curved shape so that the diameter of the central portion is smaller than the diameter of the upper and lower opening ends.It is characterized by that.
[0044]
  According to the above configuration,When the amount of water flowing into the water turbine for power generation is controlled by the servo motor, the servo motor can follow the horizontal movement and the vertical movement of the guide ring, and is not subjected to a bending load.
[0053]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described in detail with reference to the drawings.
[0054]
FIG. 1 is a plan view showing an example of an embodiment in which the present invention is applied to an electric servo motor. FIG. 2 is a side view of FIG. 1, and an electric servo motor that is a main part of the present invention is attached. The support portion is shown in a sectional view for easy understanding. In FIG. 1 and FIG. 2, the same reference numerals are assigned to the same parts in FIG. 6 and FIG.
[0055]
In FIGS. 1 and 2, 6 is a pit liner, and 8 is an arm. 20 is an electric servo motor, 21 is an electric motor, 22 is a reduction gear mechanism section, 23 is a ball screw section, 24 is a ball screw rod, 25 is a rod end, 26 is a mounting seat, and 27 and 28 are parallel pins. 30 is a vertical shaft turbine, 31 is a runner main shaft, 32 is a guide ring, 37 is a guide ring arm, and guide vanes are omitted.
[0056]
Reference numerals 50 and 51 denote main parts of the present invention, which are universal bearings, for example, spherical bearings, used for mounting and supporting the electric servomotor 20 between the pit liner 6 and the guide ring arm 37.
[0057]
Since the spherical bearing 50 is pivotally supported on the arm 8 by the parallel pin 27, the electric servomotor 20 operates in parallel with the pit liner 6 via the spherical bearing 50 by the mounting seat 26 during operation. 27 is mounted and supported so that both horizontal rotation about 27 and vertical rotation about the spherical bearing 50 are possible.
[0058]
Since the spherical bearing 51 is pivotally supported on the rod end 28 by the parallel pin 28, the guide ring 32 is parallel to the rod end 28 (electric servomotor 20) via the spherical bearing 51 by the guide ring arm 37. Both the horizontal rotation about the pin 28 and the vertical rotation about the spherical bearing 51 can be coupled together.
[0059]
As described above, when the electric servo motor 20 is connected between the pit liner 6 and the guide ring arm 37 via the spherical bearings 50 and 51, respectively, since the connecting portion is spherical, the horizontal displacement is prevented. As shown in FIG. 1, the displacement amount S that is normally required can be sufficiently followed. Further, as shown in FIG. 2, the vertical displacement can be followed up to the maximum displacement amount H.
[0060]
Therefore, the parallel pin 28 on the guide ring arm 37 side moves in an arc shape in the horizontal direction (displacement amount S) as shown in FIG. As shown in FIG. 2, even when the guide ring arm 37 moves up to the maximum displacement amount H as shown in FIG. Both displacement amounts are absorbed, and the ball screw of the electric servo motor 20 is always held in the axial direction. As a result, only the vertical load acts on the electric servo motor 20 during the operation, and no bending load is generated.
[0061]
In the above embodiment, the spherical bearings 50 and 51 are pivotally supported on the arm 8 and the rod end 25 by the parallel pins 27 and 28, respectively. However, the mounting seat 26 and the guide ring arm 37 are respectively supported by the spherical bearing 50. And 51 so that the shaft 8 can be pivotally supported (the mounting relationship between the arm 8 and the mounting seat 26 and the rod end 25 and the guide ring arm 37 by the parallel pins 27 and 28 is reversed). Obviously, even if the support seat 26 and the guide ring arm 37 are pivotally supported, they are equivalent to the above embodiment. In addition, although the pins 27 and 28 are described as parallel pins, they are not necessarily parallel, and some attachment errors are allowed.
[0062]
In addition, it is possible to use a universal joint other than the spherical bearing, but there are problems in terms of mounting space and strength, and it is impossible to employ the joint.
[0063]
In the embodiment of the present invention, the case where the present invention is applied to an electric servomotor has been described.
[0064]
FIG. 3 shows a servo motor link used to connect the rod end and the guide ring arm when the servo motor is firmly fixed to the pit liner by a flange connection as shown in FIG. 4 or FIG. FIG. 6 is an enlarged side sectional view showing an example of the embodiment, and the same parts as those in FIG.
[0065]
In FIG. 3, 40 is a servo motor link, 41 and 42 are pins, 44 is an upper plate, 45 is a lower plate, and G is a gap.
[0066]
Reference numeral 37 denotes a guide ring arm. Reference numeral 38 denotes a through hole for inserting a pin 42 which is formed at the tip of the guide ring arm 37 and connects the guide ring arm 37 and the right end of the servo motor link 40 in the figure. .
[0067]
53 is a rod end, and 54 is a through hole for inserting a pin 41 which is drilled at the tip of the rod end 53 and connects the rod end 53 and the left end of the servo motor link 40 in the figure.
[0068]
3 differs from FIG. 5 in that the cross-sectional shapes of the through-holes 38 and 54 drilled at the tips of the guide ring arm 37 and the rod end 53 are as shown in FIG. It is the point which became large and became a curved surface where the aperture of the center part becomes small.
[0069]
Thus, if the cross-sectional shape of the through holes 54 and 38 is a curved surface with a large diameter at the upper and lower open ends and a small diameter at the center, the rod end 53 and the pin 41, the guide ring arm 37 and the pin 42 are The curved contact is made only at the center of the through holes 54 and 38, respectively, and the relationship between the two is equivalent to the curved contact bearing.
[0070]
As a result, even if the parallel pin 42 on the guide ring arm 37 side moves in an arc shape in the horizontal direction due to the operation of the servo motor or the vertical movement due to the deformation of the upper cover of the vertical axis turbine (not shown) occurs, When the 41 and the pin 42 are in curved contact with each other, the servo motor rod is always held in the axial direction. Therefore, only a vertical load is applied to the servo motor during its operation, and no bending load is generated.
[0071]
In the above-described embodiment, the through holes 54 and 38 are curved surfaces having a small diameter at the center, but conversely, the through holes 54 and 38 are usually Servo motor link 40 in which the intermediate portion between pins 41 and 42 is inflated into a spherical shape or the spherical bearings shown in FIGS. 1 and 2 are pivotally supported by pins 41 and 42. Needless to say, the rod end 53 and the guide ring arm 37 are connected to each other by curved contact.
[0072]
Further, in the embodiment shown in FIGS. 1 and 2, the pit liner 6 side and the guide ring arm 37 side of the electric servo motor 20 are connected by curved contact bearings that are not spherical bearings, as described above. However, it is obvious that the same effect as described above can be obtained and the object of the present invention can be achieved.
[0073]
In the above description, the case where the present invention is applied to a vertical shaft turbine for power generation has been described, but it is needless to say that the present invention can also be applied to a horizontal shaft turbine for power generation.
[0074]
【The invention's effect】
Although the present invention has been described in detail above, according to the present invention, the servo motor has a curved contact bearing between the fixed portion (pit liner) and the power generation water turbine (guide ring arm). When the servo motor is fixed to the fixed part, the servo motor link is connected between the rod end of the servo motor and the water turbine for generation (guide ring arm), and each connection part is curved. They are connected by contact bearings.
[0075]
For this reason, when the amount of water flowing into the power generation turbine is controlled by the servo motor, the servo motor can move while easily following the horizontal and vertical movements that occur in the guide ring. Since only the load of the directional component is applied, a servo motor mounting support structure that does not receive a bending load can be obtained.
[0076]
In addition, since the bending load is not received, the life of the ball screw portion of the electric servo motor can be extended. In addition, since all the connecting parts of the servo motor and the power generation turbine are connected by curved contact bearings, positioning, centering, leveling work, etc. are performed in a relative relationship between the installation position of the turbine and the installation position of the servo motor. This eliminates the need for installation in a highly accurate positional relationship, contributing to a reduction in installation labor and a reduction in installation time.
[Brief description of the drawings]
FIG. 1 is a plan view showing an example of an embodiment when the present invention is applied to an electric servomotor.
FIG. 2 is a side view of FIG.
FIG. 3 is an enlarged side cross-sectional view showing an example of an embodiment of a servo motor link used for connecting a servo motor and a vertical shaft turbine when the servo motor is fixed to a pit liner.
FIG. 4 is a plan view showing an outline of a conventional mounting support structure of a hydraulic servo motor applied to a vertical axis turbine, and illustrating opening degree control of guide vanes of the vertical axis turbine.
FIG. 5 is an enlarged side cross-sectional view of a conventional servo motor link used for connecting the servo motor and the vertical axis turbine when the servo motor is fixed to the pit liner.
FIG. 6 is a side view for explaining an outline of a conventional mounting support structure of an electric servo motor applied to a vertical shaft turbine, and shows a mounting support portion of the electric servo motor in section.
FIG. 7 is a plan view for explaining the opening control of the guide vane of the vertical axis turbine.
FIG. 8 is a side view for explaining the outline of a conventional mounting support structure different from FIG. 6 of the electric servo motor applied to the vertical axis turbine, and showing a cross section of a connecting portion between the electric servo motor and the vertical axis turbine. .
FIG. 9 is a plan view for explaining the opening control of the guide vane of the vertical axis turbine.
[Explanation of symbols]
1 governor control device
2 Actuator
3 Pressure distribution valve
4 Piping
5 Servo amplifier
6 Pit liner
7 Flange
8 arm
10 Hydraulic servo motor
11 cylinders
12 piston
13 Piston rod
14, 25, 53 Rod end
20 Electric servo motor
21 Electric motor
22 Reduction gear mechanism
23 Ball screw
24 Ball screw rod
26 Mounting seat
27, 28 parallel pins
30 Vertical shaft turbine
31 runner spindle
32 Guide ring
33 Guide vanes
34 Guide vane shaft
35 Guide vane arm
36 Guide vane link
37 Guide ring arm
38 Guide ring arm through hole
40 Guide ring link
41, 42 pins
44 Upper plate
45 Lower plate
50, 51 Spherical bearing
54 Rod end through hole
G gap
H Maximum vertical displacement
S Horizontal displacement

Claims (1)

In the mounting support structure of the servo motor that connects the pit liner of the water turbine pit where the power generation water turbine is installed and the guide ring of the power generation water turbine via the servo motor,
A rod end connected to the servo motor and having a first through hole formed at the tip;
A guide ring arm connected to the guide ring and having a second through hole formed at a tip thereof;
Servo motor link connecting between the rod end and the guide ring arm, and having through holes at both ends,
Each of the through holes of the servo motor link, and a pair of pins that connect the first through hole and the second through hole;
A servo motor mounting support structure , wherein inner surfaces of the first through hole and the second through hole are formed in a curved shape so that a diameter of a central portion is smaller than a diameter of an upper and lower opening end .

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