Water turbine guide vane angle measurement feedback device

Abstract

The utility model discloses a water turbine guide vane angle measurement feedback device, which effectively achieves the purpose of accurately measuring the opening and closing angle of a guide vane, and comprises a fixed frame and a movable frame, the upper side of the fixed frame is provided with a movable rod capable of moving back and forth, and the front side of the movable rod is detachably connected with the movable frame. The rear part of the moving rod is fixedly connected with a connecting block, two sides of the moving rod are provided with measuring guide rails, the upper side of each measuring guide rail is slidably connected with a measuring slide block, the upper side of each measuring slide block is spherically hinged with a connecting rod, and each connecting rod is detachably connected with the connecting block. The guide vane position measuring device has the advantages that the structure is novel, the conception is ingenious, the operation is simple and convenient, the accuracy of guide vane position measurement and the operation stability are effectively ensured, and the device is more convenient to install by a worker.

Description

Technical Field

[0001] The utility model belongs to the technical field of water turbines and relates to a water turbine guide vane angle measurement feedback device. Background Art

[0002] Guide vane position feedback is used to monitor the position change of turbine guide vanes. Guide vanes are important components of turbines. The output power and efficiency of turbines can be controlled by adjusting the opening degree of guide vanes. The guide vane displacement sensor can accurately measure the position of the guide vanes and feed it back to the regulation system to achieve precise control of the guide vanes, thereby ensuring the stability and efficiency of turbine operation.

[0003] Existing displacement sensors are generally operated through mechanical transmission, which may easily cause unit failure due to vibration and fall off, or electronic board moisture caused by environmental influences. Therefore, a turbine guide vane angle measurement feedback device is needed to solve the above problems. Summary of the invention

[0004] In view of the above problems, the utility model proposes a water turbine guide vane angle measurement feedback device, which well solves the problems in the prior art.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0006] A turbine guide vane angle measurement feedback device comprises a fixed frame and a movable frame, wherein a movable rod which can move forward and backward is provided on the upper side of the fixed frame, the front side of the movable rod is detachably connected to the movable frame, a connecting block is fixedly connected to the rear part of the movable rod, a measuring guide rail detachably connected to the fixed frame is provided on the left and right sides of the movable rod, a measuring slider is slidably connected to the upper side of each measuring guide rail, a connecting rod is ball-hinged on the upper side of each measuring slider, each connecting rod is detachably connected to the connecting block, a supporting frame is detachably connected to the lower side of the fixed frame, and a connecting plate is detachably connected to the lower side of the supporting frame.

[0007] Preferably, the movable frame includes a movable plate, the upper side of the movable plate is fixedly connected to two arc-shaped plates, the upper sides of the two arc-shaped plates are commonly fixedly connected to a movable sleeve, and the movable sleeve is sleeved on the outer side of the movable rod.

[0008] Preferably, a sliding block is fixedly connected to the front portion of the fixing frame, a sliding sleeve is fixedly connected to the middle portion of the sliding block, and the sliding sleeve is coaxially sleeved on the outer side of the moving rod.

[0009] Preferably, a threaded rod rotatably connected to the fixed frame is provided on the lower side of each measuring guide rail, two disassembly blocks are symmetrically threadedly connected to the middle part of the threaded rod in the front and rear directions, a locking block is slidably connected to the upper side of each disassembly block, and multiple locking springs are provided between each locking block and the disassembly block, and a locking groove adapted to the locking block is provided at the bottom of each measuring guide rail.

[0010] Preferably, the rear side of each threaded rod is coaxially slidably connected to an operating rod via a sliding key, the front side of each operating rod is provided with a tension spring, the middle part of each operating rod is fixedly connected to a first operating block, the front side of each first operating block is provided with a first serrated surface, the rear side of the fixed frame is fixedly connected to a second operating block corresponding to the position of each first operating block, the front side of the second operating block is provided with a second serrated surface matched with the first serrated surface, and the rear side of each operating rod is fixedly connected to an operating handle.

[0011] Preferably, a measuring device is fixedly connected to the rear side of each measuring guide rail, and a plurality of waist-shaped through holes are provided on each measuring guide rail.

[0012] Preferably, a cover plate is detachably connected to the upper side of the connecting block by bolts, a connecting hole is respectively provided on the left and right side walls of the connecting block, a thread is provided on the end of each connecting rod, and each connecting rod passes through the connecting hole and is detachably connected to the connecting block by a nut.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] 1. The utility model has two measuring guide rails, a measuring slide and a measuring device. The position change of the measuring slide can be accurately measured through the principle of magnetostrictive displacement sensor. By setting two sets of measuring guide rails and measuring slides, the stability of displacement measurement can be guaranteed.

[0015] 2. The utility model has a modular and detachable design, which can facilitate the device to be disassembled for transportation and assembled.

[0016] 3. The utility model has a disassembly block, a locking block and a locking spring, which can make the fixing of the measuring guide rail more stable.

[0017] 4. The utility model abandons the original indirect measurement mode and installation method of turbine guide vane position feedback, and adopts magnetostrictive displacement sensor to directly linearly measure the piston stroke of the relay, making the guide vane position calibration and measurement more accurate, reducing the risk of unit failure caused by the original mode's moving parts falling off due to vibration or the electronic board being affected by moisture due to the environment. Through the design of the fixed frame, the measuring slider runs smoothly, the linearity of the action is high, the initial position calibration and adjustment are convenient, and the base is firmly installed. It effectively guarantees the accuracy of the guide vane position measurement and the stability of operation, providing a good foundation for the safe and reliable operation of the unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0019] Figure 2 It is a schematic diagram of the exploded structure of the fixing frame and the measuring guide rail in the utility model.

[0020] Figure 3 It is a schematic diagram of the position of the threaded rod in the utility model.

[0021] Figure 4 For this utility model Figure 2 A partial enlarged schematic diagram of area A in the middle.

[0022] Figure 5 For this utility model Figure 3 A partial enlarged schematic diagram of area B in the middle.

[0023] Figure 6 For this utility model Figure 3 A partial enlarged schematic diagram of the C area in the middle.

[0024] Figure 7 For this utility model Figure 2 A partial enlarged schematic diagram of the D area in the middle

[0025] In the figure: 1, fixed frame; 2, movable frame; 3, movable rod; 4, connecting block; 5, measuring guide rail; 6, measuring slide block; 7, connecting rod; 8, supporting frame; 9, connecting plate; 10, movable plate; 11, arc plate; 12, movable sleeve; 13, sliding block; 14, sliding sleeve; 15, threaded rod; 16, disassembly block; 17, locking block; 18, locking spring; 19, locking groove; 20, operating rod; 21, tension spring; 22, first operating block; 23, first serrated surface; 24, second operating block; 25, second serrated surface; 26, operating handle; 27, measuring device; 28, waist-shaped through hole; 29, cover plate; 30, connecting hole. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] The following is combined with Figure 1-Figure 7 The specific implementation modes of the present utility model are further described in detail.

[0028] Depend on Figure 1-Figure 7 The utility model comprises a fixed frame 1 and a movable frame 2. In order to accurately measure the opening and closing angle of the guide vane, a movable rod 3 which can be moved forward and backward is provided on the upper side of the fixed frame 1. The front side of the movable rod 3 is detachably connected to the movable frame 2. The rear part of the movable rod 3 is fixedly connected to a connecting block 4. The left and right sides of the movable rod 3 are respectively provided with a measuring guide rail 5 which is detachably connected to the fixed frame 1. A measuring slider 6 is slidably connected to the upper side of each measuring guide rail 5. A connecting rod 7 is spherically hinged on the upper side of each measuring slider 6. Each connecting rod 7 is detachably connected to the connecting block 4. A supporting frame 8 is detachably connected to the lower side of the fixed frame 1. A connecting plate 9 is detachably connected to the lower side of the supporting frame 8. The supporting frame 8 and the connecting plate 9 are detachably connected by bolts.

[0029] When in use, the fixed frame 1 can be fixed on the upper side of the oil cylinder of the guide vane servomotor, and the movable frame 2 can be fixed on the upper side of the movable shaft of the guide vane servomotor. When the device is working, as the movable shaft of the guide vane servomotor moves, the angle of the turbine guide vane will change. At the same time, the movable frame 2 will also drive the movable rod 3 to move along with the movable shaft of the guide vane servomotor, and then drive each measuring slide block 6 to move relative to the measuring guide rail 5 through the connecting block 4 and the connecting rod 7, so as to accurately measure the moving distance of the movable shaft of the guide vane servomotor.

[0030] Further, by Figure 2It is given that, in order to make it more convenient for the staff to install the device, the movable frame 2 includes a movable plate 10, and a plurality of threaded holes are arranged in an array on the movable plate 10. The movable plate 10 can be fixed to the movable shaft of the guide vane relay by bolts. Two arc plates 11 are fixedly connected to the upper side of the movable plate 10. The arc plates 11 can not only make the device more beautiful, but also reasonably avoid the connecting lines of the guide vane relay. A movable sleeve 12 is fixedly connected to the upper sides of the two arc plates 11. A threaded through hole is opened on the upper side of the movable sleeve 12. After installing bolts in the threaded through hole, the movable sleeve 12 can be detachably connected to the movable rod 3 by friction, and the movable sleeve 12 is sleeved on the outside of the movable rod 3.

[0031] Further, by Figure 2 It is given that, in order to reduce the influence of the device on the guide vane servomotor, a sliding block 13 is fixedly connected to the front of the fixed frame 1, and a sliding sleeve 14 is fixedly connected to the middle of the sliding block 13. The sliding sleeve 14 is made of polytetrafluoroethylene, has good wear resistance and self-lubricating properties, and can effectively reduce the friction between the moving rod 3 and the sliding sleeve 14. The sliding sleeve 14 is coaxially sleeved on the outside of the moving rod 3;

[0032] When the device is installed, the moving rod 3 can be passed through the sliding sleeve 14 , and then the moving sleeve 12 can be fixed to one end of the moving rod 3 , so that the moving rod 3 is connected to the moving frame 2 .

[0033] Further, by Figure 3-Figure 7 In order to facilitate the fixing of the measuring guide rail 5, a threaded rod 15 rotatably connected to the fixing frame 1 is provided on the lower side of each measuring guide rail 5, and threads with opposite rotation directions are symmetrically opened on the threaded rod 15, and the pitch of the two threads is the same. Two disassembly blocks 16 are symmetrically threadedly connected to the middle part of the threaded rod 15. When the threaded rod 15 rotates, the two disassembly blocks 16 move in opposite directions relative to the fixing frame 1. A locking block 17 is slidably connected to the upper side of each disassembly block 16, and each locking block 17 is slidably connected to the disassembly block 16. A plurality of locking springs 18 are provided between the unloading blocks 16, a groove is provided on the disassembly block 16 at a position corresponding to the locking block 17, the locking block 17 is slidably connected to the disassembly block 16 through the groove, each locking spring 18 is placed inside the groove, a locking groove 19 adapted to the locking block 17 is provided at the bottom of each of the measuring guide rails 5, the middle opening of the locking groove 19 is larger, so that the disassembly block 16 and the locking block 17 can pass through, and the openings on the front and rear sides are smaller, so that they can cooperate with the locking block 17 for limiting.

[0034] Further, the rear side of each of the threaded rods 15 is coaxially slidably connected to an operating rod 20 through a sliding key, the front side of each operating rod 20 is provided with a tension spring 21, the middle part of each operating rod 20 is fixedly connected to a first operating block 22, the front side of each first operating block 22 is provided with a first serrated surface 23, the rear side of the fixed frame 1 is fixedly connected to a second operating block 24 corresponding to the position of each first operating block 22, the second operating block 24 is annular, the operating rod 20 passes through the second operating block 24 and is slidably connected to the threaded rod 15, the front side of the second operating block 24 is provided with a second serrated surface 25 adapted to the first serrated surface 23, the first serrated surface 23 and the second serrated surface 25 are in shape with each other, so that the first operating block 22 can rotate unidirectionally relative to the second operating block 24, and the rear side of each of the operating rods 20 is fixedly connected to an operating handle 26;

[0035] When in use, the locking groove 19 at the bottom of the measuring guide rail 5 can be aligned with the disassembly block 16 and then lowered, and the operating handle 26 can be turned. At this time, under the action of the first serrated surface 23, the second serrated surface 25 and the tension spring 21, the operating handle 26 drives the threaded rod 15 to rotate through the operating rod 20, thereby driving the two disassembly blocks 16 to move away from each other. As the two locking blocks 17 contact the inner wall of the locking groove 19, the locking spring 18 is compressed and accumulates force. After the two disassembly blocks 16 move into place, the locking spring 18 will provide the disassembly block 16 with a pre-tightening force relative to the threaded rod 15, thereby reducing the probability that the threaded rod 15 rotates with vibration and causes the disassembly block 16 to shift.

[0036] Further, by Figure 3-Figure 6 It is given that, in order to accurately measure the guide vane angle of the turbine, a measuring device 27 is fixedly connected to the rear side of each measuring guide rail 5, and a plurality of waist-shaped through holes 28 are provided on each measuring guide rail 5. A fixing hole is provided on the fixing frame 1 at a position corresponding to each waist-shaped through hole 28, which can cooperate with the waist-shaped through hole 28 and be fixed by bolts;

[0037] It should be noted that the measuring guide rail 5 and the measuring slider 6 are respectively the guide rail and the slider of the prior art MTS magnetostrictive displacement sensor RPS0400MD601A01, and the measuring device 27 is the controller of the MTS magnetostrictive displacement sensor RPS0400MD601A01. Through the magnetostrictive displacement detection technology, the precise position of the measuring slider 6 on the measuring guide rail 5 can be accurately measured, and further signals can be transmitted through the controller.

[0038] Further, by Figure 1 and Figure 4It is provided that, in order to facilitate installation, a cover plate 29 is detachably connected to the upper side of the connecting block 4 by bolts, a connecting hole 30 is respectively provided on the left and right side walls of the connecting block 4, and each end of the connecting rod 7 is provided with a thread, and each connecting rod 7 passes through the connecting hole 30 and is detachably connected to the connecting block 4 by a nut.

[0039] When the utility model is used, firstly, the fixed frame 1 can be fixed on the upper side of the oil cylinder of the guide vane servomotor, and the movable frame 2 can be fixed on the upper side of the movable shaft of the guide vane servomotor. When the device is working, as the movable shaft of the guide vane servomotor moves, the angle of the turbine guide vane will be driven to change. At the same time, the movable frame 2 will also drive the movable rod 3 to move along with the movable shaft of the guide vane servomotor, and then drive each measuring slide block 6 to move relative to the measuring guide rail 5 through the connecting block 4 and the connecting rod 7, so as to accurately measure the moving distance of the movable shaft of the guide vane servomotor. In addition, the modular and detachable design makes the device more convenient to move and transport.

[0040] The utility model has a novel structure, ingenious conception, and simple and convenient operation. Through the design, the purpose of accurately measuring the opening and closing angles of the guide vanes is effectively achieved, which makes it more convenient for workers to install the device, reduces the impact of the device on the guide vane relay, facilitates the fixation of the measuring guide rail 5, and ensures the accuracy of the guide vane position measurement and the stability of operation.

[0041] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A water turbine guide vane angle measurement feedback device, comprising a fixed frame and a movable frame, characterized in that: A movable rod that can move forward and backward is provided on the upper side of the fixed frame, the front side of the movable rod is detachably connected to the movable frame, the rear part of the movable rod is fixedly connected to a connecting block, the left and right sides of the movable rod are respectively provided with a measuring guide rail detachably connected to the fixed frame, a measuring slider is slidably connected to the upper side of each measuring guide rail, a connecting rod is ball-hinged on the upper side of each measuring slider, each connecting rod is detachably connected to the connecting block, a supporting frame is detachably connected to the lower side of the fixed frame, and a connecting plate is detachably connected to the lower side of the supporting frame.

2. A water turbine guide vane angle measurement feedback device according to claim 1, characterized in that: The movable frame comprises a movable plate, the upper side of which is fixedly connected to two arc-shaped plates, the upper sides of the two arc-shaped plates are commonly fixedly connected to a movable sleeve, and the movable sleeve is sleeved on the outer side of the movable rod.

3. The water turbine guide vane angle measurement feedback device according to claim 1, characterized in that: A sliding block is fixedly connected to the front of the fixing frame, a sliding sleeve is fixedly connected to the middle of the sliding block, and the sliding sleeve is coaxially sleeved on the outer side of the moving rod.

4. The water turbine guide vane angle measurement feedback device according to claim 1, characterized in that: A threaded rod rotatably connected to the fixed frame is provided on the lower side of each measuring guide rail, two disassembly blocks are symmetrically threadedly connected to the middle part of the threaded rod, a locking block is slidably connected to the upper side of each disassembly block, and multiple locking springs are provided between each locking block and the disassembly block, and a locking groove adapted to the locking block is opened at the bottom of each measuring guide rail.

5. A water turbine guide vane angle measurement feedback device according to claim 4, characterized in that: The rear side of each threaded rod is coaxially slidably connected to an operating rod via a sliding key, the front side of each operating rod is provided with a tension spring, the middle part of each operating rod is fixedly connected to a first operating block, the front side of each first operating block is provided with a first serrated surface, the rear side of the fixed frame is fixedly connected to a second operating block corresponding to the position of each first operating block, the front side of the second operating block is provided with a second serrated surface matched with the first serrated surface, and the rear side of each operating rod is fixedly connected to an operating handle.

6. A water turbine guide vane angle measurement feedback device according to claim 1, characterized in that: A measuring device is fixedly connected to the rear side of each measuring guide rail, and a plurality of waist-shaped through holes are provided on each measuring guide rail.

7. A water turbine guide vane angle measurement feedback device according to claim 1, characterized in that: A cover plate is detachably connected to the upper side of the connecting block by bolts, a connecting hole is respectively provided on the left and right side walls of the connecting block, a thread is provided on the end of each connecting rod, and each connecting rod passes through the connecting hole and is detachably connected to the connecting block by a nut.

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