Split type speed measuring tooth disc for hydraulic unit

Abstract

The utility model belongs to the technical field of hydraulic unit rotating speed measurement, specifically relates to a split type speed measuring gear disc for hydraulic unit. Including split gear disc, gear disc fixed and adjusting device, gear disc fixed and adjusting device install on split gear disc, split gear disc is assembled into complete gear disc through positioning boss and positioning groove, and is fastened as a whole through bolt and nut cooperation pressing plate. The split type speed measuring gear disc of the utility model is designed through split type structure, makes gear disc installation and dismounting simple and quick, can be completed installation without dismantling unit main part, especially is applicable to temporary test or short -term monitoring.

Description

Technical Field

[0001] This utility model belongs to the field of hydraulic turbine speed measurement technology, specifically relating to a segmented speed measuring gear for hydraulic turbines. Background Technology

[0002] In hydraulic engineering, accurately measuring the rotational speed of a hydraulic turbine is crucial for its safe and stable operation. Currently, geared disc speed measurement technology is widely used in hydraulic engineering. Its principle is to install a ring-shaped toothed disc at the end of the turbine's shaft, and a sensor generates a pulse signal reflecting the turbine's rotational speed.

[0003] However, most existing speed measuring gears are integral structures, which have the following problems: the gears are mostly custom-made products, making installation and disassembly inconvenient; the same gear cannot adapt to shafts of different diameters; and for temporary tests or short-term monitoring projects, the installation cost is high and the cycle is long. In particular, for some older units or hydraulic turbines without dedicated speed measuring devices, there is a lack of effective means of speed measurement, making it impossible to obtain accurate dynamic speed data. Utility Model Content

[0004] The purpose of this invention is to provide a segmented speed measuring gear for hydraulic turbine units to solve the problems existing in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a segmented speed measuring gear for a hydraulic turbine unit, comprising a segmented gear and a gear fixing and adjusting device; the gear fixing and adjusting device is installed on the segmented gear; the segmented gear is assembled into a complete gear by positioning bosses and positioning grooves, and is then tightened as a whole by bolts and nuts in conjunction with pressure plates.

[0006] Preferably, the segmented toothed disc has a positioning boss at one end and a positioning groove matching the positioning boss at the other end, with through holes on the sides of the positioning boss and the positioning groove; a positioning pin hole is provided in the middle of the segmented toothed disc, with through holes on both sides of the positioning pin hole.

[0007] Preferably, the gear plate fixing and adjusting device includes a clamp, a base, a tightening bolt, a locking nut, and a fastening bolt.

[0008] Preferably, the main body of the clamp is a ruler with a trapezoidal cross-section; one end of the clamp is provided with a V-shaped opening, the front surface of the V-shaped opening is covered with a rubber layer for contacting the rotating shaft being measured; a conical countersunk hole is provided on the back of the lower part of the V-shaped opening.

[0009] Preferably, the upper part of the base is provided with a trapezoidal groove that matches the trapezoidal cross section of the scale of the clamp body, and the scale of the clamp body can move radially on the base through the trapezoidal groove.

[0010] Preferably, a threaded hole is provided in the middle of the base, through which the tightening bolt passes; a protruding positioning pin is machined at the bottom of the base, and threaded holes are provided on both sides of the positioning pin; the base and the segmented gear disc are positioned by the pin and the positioning pin hole, and are fixed by the fastening bolt.

[0011] Preferably, the top of the tightening bolt is machined with a tapered boss corresponding to the tapered countersunk hole on the lower back of the V-shaped opening of the clamp. The tightening bolt can drive the clamp to move radially on the base so that the clamp is tightened against the rotating shaft.

[0012] Preferably, the locking nut is installed on the tightening bolt and is located between the V-shaped opening of the clamp and the base, and is used to lock the tightening bolt after the clamp position is determined.

[0013] Preferably, the segmented gear disc is assembled with a positioning boss and a positioning groove to form a hollow circular structure, and the rotating shaft is located in the center of the segmented speed measuring gear disc; the bolt passes through the through hole on the segmented gear disc and is tightened as a whole with a nut and a pressure plate.

[0014] Preferably, when installing the segmented speed measuring gear, the position of the clamp is adjusted by the clamp fixing and adjusting device on the four segmented gears, so that the four clamps press against the rotating shaft. When the scale readings on the four clamps are consistent, the clamping bolts are locked by the locking nut.

[0015] The beneficial effects of this utility model are as follows: The segmented speed measuring gear disc of this utility model, through its segmented structural design, makes the installation and disassembly of the gear disc simple and quick, and can be completed without disassembling the main components of the unit, making it particularly suitable for temporary testing or short-term monitoring; its gear disc fixing and adjustment device can accurately ensure the concentricity of the gear disc and the rotating shaft, significantly improving the accuracy of speed measurement; the scale structure on the clamp ensures that the positions of each clamping point are consistent, further enhancing the consistency and reliability of the installation; the V-shaped opening combined with the rubber layer design can effectively hold the rotating shaft while avoiding damage to the shaft surface; the overall structure is simple and reliable, with low manufacturing cost, and the gear disc fixing and adjustment device is a universal component, which can be adapted to different shaft diameters by simply replacing the segmented gear disc, thus having good versatility and adaptability. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the segmented speed measuring gear of this utility model; Figure 2 This is a schematic diagram of the structure of a single segmented toothed disc; Figure 3 A schematic diagram of the gear plate fixing and adjustment device; Figure 4 A schematic diagram of the assembly of a single segmented toothed disc and its fixing and adjusting device; Figure 5A cross-sectional schematic diagram of a single segmented toothed disc and its fixing and adjusting device assembly; Figure 6 Another cross-sectional view of the assembly of a single segmented toothed disc and fixing and adjusting device; Figure 7 This is a schematic diagram of the connection of the segmented toothed disc; Figure 8 A top view of the assembled segmented velocimeter gear; In the attached diagram: 1. Rotating shaft; 2. Split gear disc; 21. Positioning boss; 22. Positioning groove; 23. Through hole; 24. Positioning pin hole; 25. Through hole; 3. Gear disc fixing and adjusting device; 31. Clamp; 311. Scale; 312. V-shaped opening; 313. Rubber layer; 314. Conical countersunk hole; 32. Base; 321. Trapezoidal groove; 322. Threaded hole; 323. Oval pin; 324. Threaded hole; 33. Tightening bolt; 331. Conical boss; 34. Locking nut; 35. Fastening bolt; 4. Bolt; 5. Nut; 6. Pressure plate. Detailed Implementation

[0017] In the description of this disclosure, it should be understood that the terms “center,” “upper,” “lower,” “front,” “rear,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” and “outer,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this disclosure and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this disclosure.

[0018] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this disclosure, unless otherwise stated, "a plurality of" means two or more.

[0019] In the description of this disclosure, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances.

[0020] The specific embodiments of this utility model are described in detail below with reference to the accompanying drawings and preferred embodiments.

[0021] Please see Figures 1-8 The present invention provides a segmented speed measuring gear for a hydraulic turbine unit, comprising: a segmented gear 2 and a gear fixing and adjusting device 3. The gear fixing and adjusting device 3 is installed on the segmented gear 2. The segmented gear 2 is assembled into a complete gear by a positioning boss 21 and a positioning groove 22, and is tightened as a whole by bolts 4 and nuts 5 in conjunction with a pressure plate 6.

[0022] The segmented toothed disc 2 has a positioning boss 21 at one end and a positioning groove 22 matching the positioning boss at the other end. The positioning boss 21 and the positioning groove 22 have through holes 23 on their sides. The segmented toothed disc 2 has a positioning pin hole 24 in the middle and through holes 25 on both sides of the positioning pin hole 24.

[0023] The gear plate fixing and adjusting device 3 includes a clamp 31, a base 32, a tightening bolt 33, a locking nut 34, and a fastening bolt 35.

[0024] The main body of the clamp 31 is a scale 311 with a trapezoidal cross-section; one end of the clamp 31 is provided with a V-shaped opening 312, and the front surface of the V-shaped opening is covered with a rubber layer 313 for contacting the rotating shaft 1 being measured; a conical countersunk hole 314 is provided on the lower back of the V-shaped opening 312.

[0025] The upper part of the base 32 is provided with a trapezoidal groove 321 that matches the trapezoidal cross section of the main scale 311 of the clamp 31. The main scale 311 of the clamp 31 can pass through the trapezoidal groove 321 and move radially on the base 32.

[0026] The base 32 has a threaded hole 322 in the middle, through which the tightening bolt 33 passes; the base 32 has a protruding positioning pin 323 at the bottom, and threaded holes 324 are provided on both sides of the positioning pin 323; the base 32 and the split toothed disc 2 are positioned by the pin 323 and the positioning pin hole 24, and are fixed by the fastening bolt 35.

[0027] The top of the tightening bolt 33 is machined with a tapered boss 331 corresponding to the tapered countersunk hole 314 on the back of the lower part of the V-shaped opening of the clamp 31. The clamp 31 can be driven to move radially on the base 32 by the tightening bolt 33 so that the clamp 31 tightens the rotating shaft 1.

[0028] The locking nut 34 is installed on the tightening bolt 33 and is located between the V-shaped opening 312 of the clamp 31 and the base 32. It is used to lock the tightening bolt 33 after the position of the clamp 31 is determined.

[0029] The segmented toothed disc is assembled with the positioning boss 21 and the positioning groove 22 to form a hollow circular structure, and the rotating shaft 1 is located in the center of the segmented speed measuring toothed disc; the bolt 4 passes through the through hole 23 on the segmented toothed disc 2 and is tightened as a whole with the nut 5 and the pressure plate 6.

[0030] When installing the segmented speed measuring gear, the position of the clamp 31 is adjusted by the clamping bolts 33 on the gear fixing and adjusting device 3 installed on the four segmented gear 2, so that the four clamps 31 press against the rotating shaft 1. When the scale readings on the four clamps 31 are consistent, the clamping bolts 33 are locked by the locking nut 34.

[0031] like Figure 1 As shown, the specific installation steps for the above-mentioned segmented speed measuring gear for hydraulic turbine units are as follows: S1. Select a suitable size of segmented toothed disc 2 based on the measured shaft. S2. Assemble the gear plate fixing and adjusting device 3: After passing the top bolt 33 through the base 32, install the locking nut 34, and pass the main body scale 311 of the clamp 31 through the trapezoidal groove 321 of the base 32. S3. Insert the positioning pin 323 of the assembled gear plate fixing and adjusting device 3 into the positioning pin hole 24 of the segmented gear plate 2, and fix the fastening bolt 35 to the base 32 after passing through the through hole 25 on the segmented gear plate 2. S4. Assemble the assembled segmented toothed disc 2 into a complete toothed disc by using the positioning boss 21 and positioning groove 22, and then use bolts 4 and nuts 5 in conjunction with the pressure plate 6 to tighten it as a whole.

[0032] S5. Adjust the position of the clamp 31 by using the clamping bolts 33 on the clamp fixing and adjusting device 3 installed on the four segmented toothed discs 2, so that the four clamps 31 clamp the rotating shaft 1. When the scale readings on the four clamps 31 are consistent, tighten the clamping bolts 33 by using the locking nut 34.

[0033] It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model.

Claims

1. A segmented speed measuring gear for hydraulic turbine units, characterized in that: It includes a split toothed disc (2) and a toothed disc fixing and adjusting device (3); the toothed disc fixing and adjusting device (3) is installed on the split toothed disc (2); the split toothed disc (2) is assembled into a complete toothed disc by a positioning boss (21) and a positioning groove (22), and is tightened as a whole by bolts (4) and nuts (5) in conjunction with a pressure plate (6).

2. The segmented velocity measuring gear according to claim 1, characterized in that: The segmented toothed disc (2) has a positioning boss (21) at one end and a positioning groove (22) matching the positioning boss at the other end. The positioning boss (21) and the positioning groove (22) have a first through hole (23) on their sides. The segmented toothed disc (2) has a positioning pin hole (24) in the middle and a second through hole (25) on both sides of the positioning pin hole (24).

3. The segmented velocimeter disc according to claim 1, characterized in that: The gear plate fixing and adjusting device (3) includes a clamp (31), a base (32), a top bolt (33), a lock nut (34), and a fastening bolt (35).

4. The segmented velocimeter disc according to claim 3, characterized in that: The main body of the clamp (31) is a scale (311) with a trapezoidal cross section; one end of the clamp (31) is provided with a V-shaped opening (312), the front surface of the V-shaped opening (312) is covered with a rubber layer (313) for contacting the rotating shaft (1) being measured; a conical countersunk hole (314) is opened on the back of the lower part of the V-shaped opening (312).

5. The segmented velocimeter disc according to claim 3, characterized in that: The upper part of the base (32) is provided with a trapezoidal groove (321) that matches the trapezoidal cross section of the main body scale (311) of the clamp (31). The main body scale (311) of the clamp (31) can pass through the trapezoidal groove (321) and move radially on the base (32).

6. The segmented velocimeter disc according to claim 3, characterized in that: The base (32) has a first threaded hole (322) in the middle, and the tightening bolt (33) passes through the first threaded hole (322); the base (32) has a protruding positioning pin (323) at the bottom, and the positioning pin (323) has second threaded holes (324) on both sides; the base (32) and the split toothed disc (2) are positioned by the pin (323) and the positioning pin hole (24), and are fixed by the fastening bolt (35).

7. The segmented velocimeter disc according to claim 3, characterized in that: The top of the tightening bolt (33) is machined with a tapered boss (331) corresponding to the tapered countersunk hole (314) on the lower back of the V-shaped opening (312) of the clamp (31). The clamp (31) can be driven to move radially on the base (32) by the tightening bolt (33) so that the clamp (31) tightens the rotating shaft (1).

8. The segmented velocimeter disc according to claim 3, characterized in that: The locking nut (34) is installed on the top bolt (33) and is located between the V-shaped opening (312) of the clamp (31) and the base (32) for locking the top bolt (33) after the position of the clamp (31) is determined.

9. The segmented velocimeter disc according to claim 1, characterized in that: The segmented toothed disc is assembled with a positioning boss (21) and a positioning groove (22) to form a hollow circular structure. The rotating shaft (1) is located in the center of the segmented speed measuring toothed disc. The bolt (4) passes through the first through hole (23) on the segmented toothed disc (2) and is tightened as a whole with the nut (5) and the pressure plate (6).

10. The segmented velocity measuring gear according to claim 1, characterized in that: When the segmented speed measuring gear is installed, the position of the clamp (31) is adjusted by the clamping bolt (33) on the gear fixing and adjusting device (3) installed on the four segmented gears (2) so that the four clamps (31) clamp the rotating shaft (1). When the scale readings on the four clamps (31) are consistent, the clamping bolt (33) is locked by the locking nut (34).

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