Fly wheel action value measuring device for detecting mechanical overspeed device of water turbine

Abstract

The application provides a fly ball action value measuring device for water turbine mechanical overspeed device detection, which comprises a base frame, one end of the base frame is connected with a fly ball, a movable sliding seat is arranged on the base frame, a tension meter and a length measuring table are arranged on the sliding seat, a reference plate is arranged on the base frame, a head of the length measuring table is in contact with the reference plate, the tension meter is provided with a screw rod connecting end, the screw rod connecting end is used for connecting a fly ball plunger of the fly ball, and the end of the base frame close to the fly ball is further provided with a guide positioning device and an auxiliary connecting assembly, so that the problem of fly ball action value detection of the mechanical overspeed device of the hydroelectric generating set is solved.

Description

Technical Field

[0001] This invention relates to the field of testing mechanical overspeed devices of hydro-generators, and in particular to a device for measuring the pendulum motion value for testing mechanical overspeed devices of hydro-generators. Background Technology

[0002] The mechanical overspeed protection device is the last line of defense in a hydro-generator unit and is crucial for preventing runaway accidents. As the unit's speed increases, the centrifugal force of the overspeed protection device's pendulum plunger, mounted on the turbine's main shaft, increases with the speed. When this centrifugal force exceeds the spring preload acting on the plunger, the pendulum plunger extends out of its chamber. When the unit's speed continues to rise to the set overspeed protection activation value, the pendulum plunger contacts the trigger arm of the hydraulic valve's tripping device, causing the hydraulic valve to trip. This switches the hydraulic circuit, enabling operations such as shutting down the unit and achieving overspeed protection.

[0003] Currently, the detection of the overspeed device's runaway motion value in hydroelectric turbines, both domestically and internationally, is generally achieved through actual machine testing or offline calibration. During actual machine testing, the unit's speed is often already at a high level, which may significantly increase vibration and runaway, causing abnormal bearing temperatures. Sudden shutdowns can also generate water hammer, leading to turbine lift-off and significant damage to the unit, posing a substantial safety risk. Offline calibration, on the other hand, uses a test bench environment that differs from the actual machine testing environment, requiring conversion of measurement results and introducing conversion errors. Furthermore, the same test bench is insufficient to calibrate various types of runaway motion in different hydroelectric power stations, and it suffers from long inspection cycles and difficulties in reinstalling the equipment after inspection. Summary of the Invention

[0004] This invention provides a device for measuring the oscillation value of the mechanical overspeed device of a hydro turbine, which solves the problem of detecting the oscillation value of the mechanical overspeed device of a hydro turbine generator set.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is: a pendulum motion value measuring device for detecting mechanical overspeed devices of water turbines, comprising a base frame, one end of the base frame being connected to the pendulum, a movable sliding seat being provided on the base frame, a tension gauge and a length measuring instrument being provided on the sliding seat, a reference plate being provided on the base frame, the head of the length measuring instrument contacting the reference plate, the tension gauge being provided with a screw connection end, the screw connection end being used to connect the pendulum plunger of the pendulum, and a guide positioning device and an auxiliary connection assembly being provided at the end of the base frame near the pendulum.

[0006] In the preferred embodiment, an adapter and a pendulum connecting screw are also provided. One end of the adapter is connected to the connecting end of the screw, and the other end of the adapter is connected to the pendulum connecting screw. The pendulum connecting screw is connected to the pendulum plunger, and the pendulum connecting screw is replaceable.

[0007] In the preferred embodiment, a C-shaped pendulum plunger positioning block is also provided. One end of the pendulum plunger positioning block is close to the end face of the pendulum. The pendulum plunger positioning block is provided with a positioning step, which is close to the end face of the pendulum plunger. The pendulum plunger positioning block is replaceable.

[0008] In a preferred embodiment, the adapter includes a first connecting sleeve and a second connecting sleeve. The first connecting sleeve is connected to the screw connecting end, and the second connecting sleeve is connected to the pendulum connecting screw. A third connecting sleeve is sleeved between the first and second connecting sleeves. One end of the first or second connecting sleeve is provided with an outward protruding step, and one end of the third connecting sleeve is provided with an inward retracting step. The inward retracting step and the outward protruding step cooperate with each other. A retaining spring is provided on the first or second connecting sleeve, and the retaining spring limits one end of the third connecting sleeve.

[0009] In a preferred embodiment, the guiding and positioning device includes a swivel foot that can rotate omnidirectionally, the angle of which can be locked, the swivel foot abutting against the end face of the pendulum, the base frame having a front plate, and the auxiliary connecting assembly including a connecting guide sleeve on the front plate, a connecting guide rod inside the connecting guide sleeve, a connecting block at the end of the connecting guide rod, and the connecting block connecting to the end face of the pendulum.

[0010] In the preferred embodiment, a limiting baffle is provided at the end of the connecting guide rod away from the connecting block, and a connecting cross plate is also provided. The two ends of the connecting cross plate are respectively slidably sleeved with the connecting guide rod of the adjacent auxiliary connecting component.

[0011] In a preferred embodiment, the guiding and positioning device includes multiple swing feet, each with a mating ball joint and a ball joint seat. One end of the ball joint seat is connected to a sliding sleeve rod. A fixed guide sleeve is provided on the front end plate of the base frame, which is slidably sleeved with the sliding sleeve rod. Both ends of the sliding sleeve rod are provided with large-diameter baffles, and both ends of the sliding sleeve rod are fitted with retaining springs. One end of the retaining spring abuts against the large-diameter baffle, and the other end of the retaining spring abuts against the fixed guide sleeve. The front end plate of the base frame also has a slidable extension sleeve, which has multiple racks along its circumference. The front end plate of the base frame has multiple connecting lugs, and each connecting lug has a rotatable rotating rod. One end of the rotating rod has a gear, which meshes with each rack. The other end of the rotating rod has a push rod, which is threadedly connected to the side wall of the fixed guide sleeve. A clamping block is provided inside the fixed guide sleeve, and the push rod abuts against the clamping block. The extension sleeve slides to rotate the rotating rod and cause the clamping block to clamp or loosen the outer wall of the sliding sleeve rod.

[0012] In the preferred embodiment, a magnetic block is provided at the bottom of the swing foot base.

[0013] In a preferred embodiment, an operating panel is also provided, with a connecting sleeve in the center of the operating panel. The connecting sleeve is connected to the end of the extension sleeve. The operating panel is also provided with multiple connecting extension rods. The ball joint seat and the sliding sleeve rod are hollow structures that are connected. A slidable plug and a friction sleeve are provided inside the hollow structure. A compression spring is provided between the plug and the friction sleeve. One end of the connecting extension rod is connected to the plug, and the friction sleeve contacts the outer wall of the ball joint.

[0014] The beneficial effects of this invention are as follows: It employs a base frame to mount the tension gauge and length measuring instrument for testing, featuring an integrated structure that is compact, small, and easy to carry; when the unit is shut down, the original overspeed device pendulum does not need to be disassembled, allowing for online testing by a single person, providing a scientific basis for judging the performance of the overspeed device and routine maintenance; the testing process is completed on the actual machine, simulating the real environment as much as possible while avoiding unit abnormalities caused by pendulum rotation, ensuring accurate and reliable measurement of action values; equipped with an adapter and replaceable pendulum connecting screw, it is applicable to different types of mechanical overspeed devices in hydropower stations. The system enables online testing of the pendulum's performance. The preferred design utilizes multiple independently extendable and omnidirectional feet as guiding and positioning devices, adapting to pendulum end faces of different specifications and ensuring coaxiality between the pendulum connecting screw and the pendulum plunger threaded hole. A distributed contact approach is adopted, breaking down the original large-area connecting block into multiple smaller-area connecting blocks. These, along with the magnetic blocks on the multiple feet, achieve multi-point connection with the pendulum end face, improving the stress on the cantilever structure and enhancing connection stability. An operating panel and connecting device simultaneously control the locking of multiple sliding sleeves and swing feet, ensuring simple and reliable operation. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0016] Figure 1 This is a schematic diagram of the present invention.

[0017] Figure 2 This is a front view of the present invention.

[0018] Figure 3 This is a connection diagram of the present invention.

[0019] Figure 4 This is a cross-sectional view of the adapter of the present invention.

[0020] Figure 5 This is an optimized schematic diagram of the present invention.

[0021] Figure 6 This is a schematic diagram of the installation of the guiding and positioning device and auxiliary connecting components of the present invention.

[0022] Figure 7 This is a front view of the guiding and positioning device and auxiliary connecting components of the present invention.

[0023] Figure 8 This is a cross-sectional view of the guiding and positioning device and auxiliary connecting components of the present invention.

[0024] Figure 9 This is a cross-sectional view of the auxiliary connection component of the present invention.

[0025] Figure 10 This is a cross-sectional view of the guiding and positioning device of the present invention. Figure 1 .

[0026] Figure 11 This is a cross-sectional view of the guiding and positioning device of the present invention. Figure 2 .

[0027] Figure 12 This is a bottom view of the guiding and positioning device of the present invention.

[0028] In the diagram: Base frame 1; front plate 101 of base frame; rear plate 102 of base frame; sliding seat 103; tension gauge 2; screw connection end 201; length gauge 3; reference plate 301; sliding sleeve 302; locking screw 303; handwheel 4; adapter 5; first connecting sleeve 501; second connecting sleeve 502; third connecting sleeve 503; snap ring 504; inward step 505; outward step 506; lead screw 6; connecting block 7; pendulum 8; pendulum plunger 801; pendulum plunger spring 802; pendulum connecting screw 803; pendulum plunger positioning block 804; pendulum plunger locking screw 805. 05; Positioning step 806; Guide positioning device 9; Swing foot 901; Ball joint 902; Ball joint seat 903; Sliding sleeve rod 904; Fixed guide sleeve 905; Clamping block 906; Magnetic block 907; Rotating rod 908; Tightening knob 909; Auxiliary connecting assembly 10; Connecting guide rod 1001; Connecting guide sleeve 1002; Connecting cross plate 1003; Limiting stop 1004; Operating plate 11; Extension sleeve 12; Rack 1201; Holding spring 13; Gear 14; Connecting extension rod 15; Slide plug 16; Compression spring 17; Friction clamp 18; Connecting column sleeve 19. Detailed Implementation

[0029] Example 1:

[0030] like Figure 1-12 Among them, a device for measuring the pendulum motion value for detecting mechanical overspeed devices of water turbines includes a base frame 1, one end of which is connected to a pendulum 8. A movable sliding seat 103 is provided on the base frame 1. A tension gauge 2 and a length measuring gauge 3 are provided on the sliding seat 103. A reference plate 301 is provided on the base frame 1. The head of the length measuring gauge 3 contacts the reference plate 301. The tension gauge 2 is provided with a screw connection end 201, which is used to connect the pendulum plunger 801 of the pendulum 8. A guide positioning device 9 and an auxiliary connection assembly 10 are also provided at the end of the base frame 1 near the pendulum 8.

[0031] The base frame 1 includes a front plate 101 and a rear plate 102 arranged in parallel. At least two connecting slide rods are provided between the front plate 101 and the rear plate 102. A sliding sleeve 302 is fitted on the connecting slide rod. A locking screw 303 is provided on the sliding sleeve 302. The locking screw 303 passes through the sliding sleeve 302 to abut against the connecting slide rod. A reference plate 301 is provided at one end of the sliding sleeve 302.

[0032] The base frame 1 is also provided with a lead screw 6, which is threadedly connected to the sliding seat 103, and a handwheel 4 is provided at one end of the lead screw 6.

[0033] The guiding and positioning device 9 is adapted to different specifications of flying pendulum 8, ensuring that the base frame 1 is aligned with the flying pendulum 8. The auxiliary connecting component 10 includes a magnet or a glue block, which can be adsorbed or glued to the flying pendulum 8.

[0034] The sliding sleeve 302 can slide, which makes it easy to zero the length measuring instrument 3. After zeroing, the locking screw 303 is locked to fix the sliding sleeve 302.

[0035] One end of the pendulum plunger 801 of the pendulum 8 is connected to the screw connection end 201 through a connecting device, and the other end of the pendulum plunger 801 is connected to the pendulum plunger spring 802. The greater the rotation speed of the pendulum 8, the longer the pendulum plunger 801 extends until it can touch the trigger switch.

[0036] The length measuring gauge 3 is a dial indicator or micrometer. When the screw connection end 201 is connected to the pendulum plunger 801, the tension gauge 2 and the length measuring gauge 3 are zeroed. The handwheel 4 is turned so that the sliding seat 103 moves linearly. The value displayed by the length measuring gauge 3 reaches the theoretical extension length of the pendulum plunger 801 when the switch is triggered. The tension displayed by the tension gauge 2 at this time is recorded. This tension is approximately equal to the change in tension in the pendulum plunger spring 802 at this time. Since the mass and radius of rotation of the pendulum plunger 801 are known, and the elastic coefficient of the pendulum plunger spring 802 is known, the theoretical speed of the pendulum plunger 801 corresponding to the tension of the pendulum plunger spring 802 at this time can be easily calculated by using the centripetal force calculation formula. The upper limit of the speed when the switch is triggered is compared with the theoretical speed. If they match, it indicates that the speed protection device is in good condition.

[0037] In the preferred embodiment, an adapter 5 and a pendulum connecting screw 803 are also provided. One end of the adapter 5 is connected to the screw connecting end 201, and the other end of the adapter 5 is connected to the pendulum connecting screw 803. The pendulum connecting screw 803 is connected to the pendulum plunger 801. The pendulum connecting screw 803 is replaceable.

[0038] In the preferred embodiment, a C-shaped pendulum plunger positioning block 804 is also provided. One end of the pendulum plunger positioning block 804 is close to the end face of the pendulum 8. The pendulum plunger positioning block 804 is provided with a positioning step 806. The positioning step 806 is close to the end face of the pendulum plunger 801. The pendulum plunger positioning block 804 is replaceable.

[0039] Since there are multiple specifications for the pendulum 8, the testing device needs to be compatible by replacing the pendulum connecting screw 803 to match the bore diameter on the pendulum plunger 801. Because the pendulum connecting screw 803 is threaded to the pendulum plunger 801, installing the screw will pull the plunger 801. To ensure that the force in the pendulum plunger spring 802 after installation is equal to the force in the pendulum plunger spring 802 when the machine is stopped, the positioning step 806 of the pendulum plunger positioning block 804 needs to block the pendulum plunger 801. The pendulum plunger positioning block 804 can be replaced to fit different specifications of pendulum plungers 801. After installation, tighten the pendulum plunger locking screw 805 and then remove the pendulum plunger positioning block 804. Since the pendulum plunger positioning block 804 is C-shaped with one open end, it can be removed without contacting the pendulum connecting screw 803.

[0040] In a preferred embodiment, the adapter 5 includes a first connecting sleeve 501 and a second connecting sleeve 502. The first connecting sleeve 501 is connected to the screw connecting end 201, and the second connecting sleeve 502 is connected to the pendulum connecting screw 803. A third connecting sleeve 503 is sleeved between the first connecting sleeve 501 and the second connecting sleeve 502. One end of the first connecting sleeve 501 or the second connecting sleeve 502 is provided with an outward protruding step 506, and one end of the third connecting sleeve 503 is provided with an inward retracting step 505. The inward retracting step 505 cooperates with the outward protruding step 506. A retaining spring 504 is provided on the first connecting sleeve 501 or the second connecting sleeve 502, and the retaining spring 504 limits one end of the third connecting sleeve 503.

[0041] The third connecting sleeve 503 is threadedly connected to one of the first connecting sleeve 501 and the second connecting sleeve 502, and is rotatably sleeved with the other and limited by a snap ring 504 to prevent axial movement. The first connecting sleeve 501 is threadedly connected to the screw connecting end 201, and the second connecting sleeve 502 is threadedly connected to the pendulum connecting screw 803. After the connection is completed, the screws are used to lock and prevent loosening.

[0042] In a preferred embodiment, the guiding and positioning device 9 includes a omnidirectionally rotatable swing foot 901, the angle of which is lockable. The swing foot 901 rests against the end face of the pendulum 8. The base frame 1 is provided with a base frame front end plate 101. The auxiliary connecting assembly 10 includes a connecting guide sleeve 1002 provided on the base frame front end plate 101. A connecting guide rod 1001 is provided inside the connecting guide sleeve 1002. A connecting block 7 is provided at the end of the connecting guide rod 1001. The connecting block 7 is connected to the end face of the pendulum 8.

[0043] Since the end face of the pendulum 8 may be flat, curved, or other types of surfaces, and the axis of the threaded hole of the pendulum plunger 801 may not be perpendicular to the end face of the pendulum 8, the pendulum connecting screw 803 may be difficult to screw into the threaded hole of the pendulum plunger 801 after the base frame 1 is connected and positioned with the pendulum 8. Therefore, the correct procedure is to, after pressing the pendulum 8 end face tightly, adjust the general orientation of the swing foot 901 according to the end face angle, and attempt to screw the pendulum connecting screw 803 into the threaded hole of the pendulum plunger 801. At this time, slowly adjust the orientation of the swing foot 901 until the pendulum connecting screw 803 is smoothly screwed in, lock the orientation of the swing foot 901, and push the connecting guide rod 1001 to bring the connecting block 7 into contact with the end face of the pendulum 8, so as to attract or bond the pendulum 8.

[0044] In a preferred embodiment, the end of the connecting guide rod 1001 away from the connecting block 7 is provided with a limiting baffle 1004, and a connecting horizontal plate 1003 is also provided. The two ends of the connecting horizontal plate 1003 are respectively slidably sleeved with the connecting guide rod 1001 of the adjacent auxiliary connecting assembly 10.

[0045] After the test is completed, pulling the connecting plate 1003 can lift multiple connecting blocks 7 at the same time, reducing the complexity of the operation.

[0046] In a preferred embodiment, the guiding and positioning device 9 includes multiple swing feet 901. Each swing foot 901 is equipped with a mating ball joint 902 and a ball joint seat 903. One end of the ball joint seat 903 is connected to a sliding sleeve rod 904. A fixed guide sleeve 905 is provided on the front end plate 101 of the base frame. The fixed guide sleeve 905 is slidably sleeved with the sliding sleeve rod 904. Both ends of the sliding sleeve rod 904 are provided with large-diameter baffles. Both ends of the sliding sleeve rod 904 are fitted with retaining springs 13. One end of the retaining spring 13 abuts against the large-diameter baffle, and the other end of the retaining spring 13 abuts against the fixed guide sleeve 905. The front end plate 101 of the base frame... It is also provided with a slidable extension sleeve 12, which has multiple racks 1201 along the circumference. The front end plate 101 of the base frame has multiple connecting ear sleeves, and the connecting ear sleeves have rotatable rotating rods 908. One end of the rotating rod 908 has a gear 14, which meshes with each rack 1201. The other end of the rotating rod 908 has a push rod, which is threaded to the side wall of the fixed guide sleeve 905. The fixed guide sleeve 905 has a clamping block 906 inside, and the push rod abuts against the clamping block 906. The extension sleeve 12 slides to make the rotating rod 908 rotate and make the clamping block 906 clamp or loosen the outer wall of the sliding sleeve rod 904.

[0047] Because of the presence of the retaining spring 13, when the swing foot 901 contacts the end face of the pendulum 8, the retraction length of different sliding sleeves 904 can be different, which can adapt to uneven pits or protrusions on the end face of the pendulum 8. The fixed guide sleeve 905 is equipped with a copper sleeve or ceramic sleeve, and multiple sliding sleeves 904 are arranged in parallel. When the extension sleeve 12 slides, all sliding sleeves 904 can be locked at the same time. Since the swing foot 901 contacts the end face of the pendulum 8, the swing foot 901 cannot rotate after the sliding sleeves 904 are locked, and the state of the guide positioning device 9 is locked.

[0048] In the preferred embodiment, a magnetic block 907 is provided at the bottom end of the swing foot 901.

[0049] The magnetic block 907 allows the swing foot 901 to adhere to the end face of the pendulum 8. A thin sleeve with high friction is fitted onto the end face of the swing foot 901. After the operator places the guide positioning device 9 against the pendulum 8, the front end of the base frame 1 is attracted. One hand can hold the tail end of the base frame 1, freeing the other hand to rotate the pendulum connecting screw 803 while adjusting the angle of the tail end of the base frame 1 until the pendulum connecting screw 803 is aligned with the threaded hole of the pendulum plunger 801. After screwing the pendulum connecting screw 803 in a certain position, the extension sleeve 12 is pressed down and the sliding sleeve rods 904 are locked. Then, the pendulum connecting screw 803 is rotated further into place. Subsequently, the connecting guide rod 1001 is pushed to press the connecting block 7 against the end face of the pendulum 8, attracting the pendulum 8, and the detection device is then fixed.

[0050] Since there are at least three or four swing feet 901, multiple connecting blocks 7 can be set. The structure of multi-point dispersed adsorption is adopted to avoid the problem that the actual adsorption surface is small due to the arc or uneven end face of the swing 8, and that the swing feet 901 are pulled skewed by the suction force of the connecting blocks 7.

[0051] The ball joint seat 903 has multiple tightening knobs 909 on its side wall. The tightening knobs 909 pass through the side wall of the ball joint seat 903 and abut against the ball joint 902. The tightening amount of the tightening knobs 909 can be pre-adjusted so that the swing foot seat 901 has a certain damping feel when swinging. When the sliding sleeve 904 is locked, the angle of the swing foot seat 901 is more stable.

[0052] In a preferred embodiment, an operation plate 11 is also provided. A connecting sleeve 19 is provided in the center of the operation plate 11. The connecting sleeve 19 is connected to the end of the extension sleeve 12. The operation plate 11 is also provided with multiple connecting extension rods 15. The ball joint seat 903 and the sliding sleeve rod 904 are hollow structures that are connected. A slidable plug 16 and a friction sleeve 18 are provided inside the hollow structure. A compression spring 17 is provided between the plug 16 and the friction sleeve 18. One end of the connecting extension rod 15 is connected to the plug 16, and the friction sleeve 18 contacts the outer wall of the ball joint 902.

[0053] The control panel 11 is equipped with an operating handle for easy gripping. When the control panel 11 is pressed down, the extension sleeve 12 and the connecting extension rod 15 move down simultaneously. While the sliding sleeve rod 904 is locked, the spring 17 is compressed by the plug 16, and the spring 17 transmits the pressure to the friction sleeve 18. The contact force between the friction sleeve 18 and the ball joint 902 increases, and the force that the swing foot 901 needs to overcome to swing increases. Since the tightening knob 909 has reduced the swing flexibility of the swing foot 901, when the friction sleeve 18 presses against the ball joint 902, the swing foot 901 is actually difficult to swing and is effectively locked, which further improves the structural stability of the guide positioning device 9 in the locked state.

[0054] Example 2:

[0055] 1. According to Hooke's Law, the formula for calculating elastic force is: F = -kx (or ΔF = -kΔx).

[0056] Where k is called the spring constant.

[0057] F can be measured using a tension scale, and Δx is the spring elongation. When the spring elongation Δx of the overspeed device's pendulum is the operating value, the corresponding tension F is equivalent to the centrifugal force of the pendulum when the overspeed device operates. By comparing the correspondence between F and Δx measured on different models laterally, and comparing the correspondence between F and Δx measured on the same machine in different years longitudinally, the flexibility of the pendulum plunger's operation and the lifespan of the spring can be judged.

[0058] 2. Components of the detection device

[0059] The testing device mainly consists of a frame, a tension scale, a dial indicator, a handwheel, an adapter, a lead screw, and an adjusting block. The frame should be made of lightweight, non-deformable metal. The tension scale has a maximum range of 200N and a measurement accuracy of 0.01N, used to measure the tension of the pendulum plunger spring. The dial indicator has a measurement accuracy of 0.01mm and is used to measure the elongation of the pendulum plunger spring. The handwheel is used to rotate the lead screw, which in turn drives the tension scale to stretch the pendulum spring plunger. The adapter is used to adapt to different types of pendulum plungers. The adjusting block provides a reaction force for the stretching of the plunger spring; the adjusting block should be magnetic to prevent it from falling off.

[0060] 2. How to use portable speed protection device rapid testing equipment

[0061] (1) Place the adjustment block between the pendulum and the measuring device, and fix the two into a whole under the action of magnetic force.

[0062] (2) Slowly rotate the handwheel to screw the adapter into the plunger.

[0063] (3) Zero the tension scale and dial indicator.

[0064] (4) Slowly rotate the handwheel to stretch the plunger spring, and record the spring elongation and tension of the dial indicator in stages.

[0065] (5) When the elongation reaches the length of the swing motion, the tension is recorded as the tension force.

[0066] (6) Repeat the above steps 3 times and take the average value of the 3 tensile force measurements.

[0067] (7) Compare the average measured tension with historical measurement data to determine the performance of the spring. Adjust the spring according to the measurement results until the requirements are met.

[0068] The above embodiments are merely preferred technical solutions of the present invention and should not be considered as limitations on the present invention. The scope of protection of the present invention should be limited to the technical solutions described in the claims, including equivalent substitutions of the technical features described in the claims. That is, equivalent substitutions and improvements within this scope are also within the scope of protection of the present invention.

Claims

1. A flywheel action value measuring device for detecting a mechanical overspeed device of a hydraulic turbine, characterized in that: Includes a base frame (1), one end of which is connected to the pendulum (8). The base frame (1) is provided with a movable sliding seat (103), and the sliding seat (103) is provided with a tension gauge (2) and a length measuring instrument (3). The base frame (1) is provided with a reference plate (301), and the head of the length measuring instrument (3) contacts the reference plate (301). The tension gauge (2) is provided with a screw connection end (201), which is used to connect the pendulum plunger (801) of the pendulum (8). The base frame (1) is also provided with a guide positioning device (9) and an auxiliary connection component (10) at the end near the pendulum (8). It is also equipped with an adapter (5) and a pendulum connecting screw (803). One end of the adapter (5) is connected to the screw connecting end (201), and the other end of the adapter (5) is connected to the pendulum connecting screw (803). The pendulum connecting screw (803) is connected to the pendulum plunger (801). The pendulum connecting screw (803) is replaceable. The guiding and positioning device (9) includes a swivel foot (901) that can rotate in all directions. The angle of the swivel foot (901) can be locked. The swivel foot (901) abuts against the end face of the flying pendulum (8). The base frame (1) is provided with a base frame front end plate (101). The auxiliary connecting component (10) includes a connecting guide sleeve (1002) provided on the base frame front end plate (101). A connecting guide rod (1001) is provided inside the connecting guide sleeve (1002). A connecting block (7) is provided at the end of the connecting guide rod (1001). The connecting block (7) is connected to the end face of the flying pendulum (8).

2. The device for measuring the flywheel action value for detecting the mechanical overspeed protection of a hydraulic turbine according to claim 1, characterized in that it comprises: It is also equipped with a C-shaped pendulum plunger positioning block (804). One end of the pendulum plunger positioning block (804) is close to the end face of the pendulum (8). The pendulum plunger positioning block (804) is equipped with a positioning step (806). The positioning step (806) is close to the end face of the pendulum plunger (801). The pendulum plunger positioning block (804) is replaceable.

3. The device for measuring the flywheel action value for detecting the mechanical overspeed protection of a hydraulic turbine according to claim 1, characterized in that it comprises: The adapter (5) includes a first connecting sleeve (501) and a second connecting sleeve (502). The first connecting sleeve (501) is connected to the screw connecting end (201), and the second connecting sleeve (502) is connected to the pendulum connecting screw (803). A third connecting sleeve (503) is sleeved between the first connecting sleeve (501) and the second connecting sleeve (502). One end of the first connecting sleeve (501) or the second connecting sleeve (502) is provided with an outward protruding step (506), and one end of the third connecting sleeve (503) is provided with an inward retracting step (505). The inward retracting step (505) cooperates with the outward protruding step (506). A retaining ring (504) is provided on the first connecting sleeve (501) or the second connecting sleeve (502), and the retaining ring (504) limits one end of the third connecting sleeve (503).

4. The device for measuring the flywheel action value for detecting the overspeed protection of a hydraulic turbine machine according to claim 1, characterized in that: The end of the connecting guide rod (1001) away from the connecting block (7) is provided with a limiting baffle (1004) and a connecting horizontal plate (1003). The two ends of the connecting horizontal plate (1003) are respectively slidably sleeved with the connecting guide rod (1001) of the adjacent auxiliary connecting component (10).

5. The device for measuring the flywheel action value for detecting the mechanical overspeed protection of a hydraulic turbine according to claim 1, characterized in that it comprises: The guiding and positioning device (9) includes multiple swing feet (901). Each swing foot (901) is equipped with a matching ball joint (902) and a ball joint seat (903). One end of the ball joint seat (903) is connected to a sliding sleeve rod (904). A fixed guide sleeve (905) is provided on the front end plate (101) of the base frame. The fixed guide sleeve (905) is slidably sleeved with the sliding sleeve rod (904). Both ends of the sliding sleeve rod (904) are provided with large-diameter baffles. Both ends of the sliding sleeve rod (904) are fitted with retaining springs (13). One end of the retaining spring (13) abuts against the large-diameter baffle, and the other end of the retaining spring (13) abuts against the fixed guide sleeve (905). The front end plate (101) of the base frame is also provided with A sliding extension sleeve (12) is provided with multiple racks (1201) along the circumference. The front end plate (101) of the base frame is provided with multiple connecting ear sleeves. A rotatable rotating rod (908) is provided on the connecting ear sleeve. A gear (14) is provided at one end of the rotating rod (908). Each gear (14) meshes with each rack (1201). A push rod is provided at the other end of the rotating rod (908). The push rod is threaded to the side wall of the fixed guide sleeve (905). A clamping block (906) is provided inside the fixed guide sleeve (905). The push rod abuts against the clamping block (906). The extension sleeve (12) slides to make the rotating rod (908) rotate and make the clamping block (906) clamp or loosen the outer wall of the sliding sleeve rod (904).

6. The device for measuring the flywheel action value for detecting the overspeed protection of a hydraulic turbine machine according to claim 5, characterized in that: A magnetic block (907) is provided at the bottom of the swing foot (901).

7. The device for measuring the pendulum motion value for detecting mechanical overspeed devices of water turbines according to claim 6, characterized in that: An operating plate (11) is also provided. A connecting sleeve (19) is provided in the center of the operating plate (11). The connecting sleeve (19) is connected to the end of the extension sleeve (12). Multiple connecting extension rods (15) are also provided on the operating plate (11). The ball joint seat (903) and the sliding sleeve rod (904) are connected hollow structures. A sliding plug (16) and a friction sleeve (18) are provided inside the hollow structure. A compression spring (17) is provided between the plug (16) and the friction sleeve (18). One end of the connecting extension rod (15) is connected to the plug (16). The friction sleeve (18) contacts the outer wall of the ball joint (902).

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