Speed measuring device, hydraulic turbine and hydro-generator set

Abstract

The application relates to a speed measuring device, a water turbine and a water turbine generator set. The speed measuring device comprises a rotating disc, an elastic mounting piece, a roller and a first speed measuring sensor, the rotating disc rotates synchronously with a rotating shaft; one end of the elastic mounting piece in the axial direction of the rotating disc is used for connecting a fixed end of the water turbine; the roller is rotatably arranged at the other end of the elastic mounting piece, the roller abuts against one side of the rotating disc in the axial direction to be in transmission connection with the rotating disc, the roller is provided with a first detection hole, the first speed measuring sensor is arranged at the other end of the elastic mounting piece, the first speed measuring sensor is provided with a first probe, and the first probe is opposite to the first detection hole in the axial direction of the roller. The speed measuring device can detect the low-speed rotating speed of the rotating shaft of the water turbine body, reminds personnel to handle, avoids the wear of the water turbine body due to the peristalsis phenomenon, guarantees the safety and service life of the speed measuring device, and guarantees the accuracy of detection.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of water turbine speed measurement, and in particular to a speed measurement device, a water turbine and a water turbine generator set. BACKGROUND

[0002] The water turbine generator set comprises a water turbine, a water turbine generator and its auxiliary equipment (speed regulation and excitation device), and is a kind of hydroelectric power generation equipment. After the water turbine generator set is operated for a period of time, if the water guide mechanism of the water turbine generator set leaks, the water turbine will rotate, causing the water turbine generator set to exhibit a creeping phenomenon after shutdown, which is harmful to the water turbine and the water turbine generator. However, when the creeping phenomenon occurs, the speed measurement device of the water turbine generator set cannot detect the speed of the water turbine due to the low speed of the water turbine, so that the alarm cannot be sent in time. SUMMARY

[0003] The present application aims to at least solve one of the technical problems in the related art. To this end, the embodiments of the present application propose a speed measurement device capable of detecting whether the water turbine body is in a creeping state and the speed of the rotating shaft of the water turbine body in the creeping state, and has accuracy in speed measurement and safety in use.

[0004] The embodiments of the present application also propose a water turbine.

[0005] The embodiments of the present application also propose a water turbine generator set.

[0006] The speed measurement device of the embodiments of the present application comprises:

[0007] A rotating disc is arranged on the rotating shaft of the water turbine to rotate synchronously with the rotating shaft;

[0008] An elastic mounting member is connected to the fixed end of the water turbine at one end in the axial direction of the rotating disc, and is adjacent to the rotating disc at the other end in the axial direction of the rotating disc;

[0009] A roller is rotatably arranged at the other end of the elastic mounting member, and abuts against one side of the rotating disc in the axial direction to be in transmission connection with the rotating disc, the transmission ratio of the rotating disc and the roller is less than or equal to 0.2, the roller is provided with a first detection hole, and a plurality of first detection holes are distributed equidistantly along the circumferential direction of the roller; and

[0010] A first speed measurement sensor is arranged at the other end of the elastic mounting member, and has a first probe, which is opposite to the first detection hole in the axial direction of the roller and is spaced apart from the roller.

[0011] The speed measuring device can detect the low-speed rotating speed of the rotating shaft of the water turbine body, and the first speed measuring sensor can change the detection data, so that the water turbine generator set can timely send an alarm to remind personnel to process, so as to avoid the wear of the water turbine body due to the peristalsis phenomenon. And ensure the safety and service life of the speed measuring device under the normal working state of the water turbine body, and ensure the accuracy of the detection of the speed measuring device under the non-working state of the water turbine body.

[0012] In some embodiments, a second detection hole is arranged on the rotating disc, and a plurality of second detection holes are arranged at equal intervals along the circumference of the rotating disc;

[0013] The speed measuring device further comprises a second speed measuring sensor arranged on the other end of the elastic mounting member, the second speed measuring sensor has a second probe, the second probe is opposite to the second detection hole in the axial direction of the rotating disc, and the second probe is spaced apart from the rotating disc.

[0014] In some embodiments, the one side of the rotating disc is provided with a friction surface, and the roller is provided with a rubber layer abutting against the friction surface.

[0015] In some embodiments, the elastic mounting member comprises:

[0016] An elastic member, one end of the elastic member in the axial direction of the rotating disc is used to connect the fixed end of the water turbine;

[0017] A mounting bracket, the mounting bracket is connected with the other end of the elastic member in the axial direction of the rotating disc, and the mounting bracket constitutes the other end of the elastic mounting member.

[0018] In some embodiments, the elastic mounting member further comprises a mounting seat, one end of the mounting seat is used to connect the fixed end of the water turbine, and the other end of the mounting seat is connected with the one end of the elastic member.

[0019] In some embodiments, the elastic mounting member further comprises a damper, the damper extends along the axial direction of the rotating disc, one end of the damper in the axial direction of the rotating disc is connected with the other end of the mounting seat, and the other end of the damper in the axial direction of the rotating disc is connected with the mounting bracket.

[0020] In some embodiments, the elastic member is a spring; optionally, the spring is sleeved on the damper.

[0021] In some embodiments, the other end of the mounting seat is provided with a first connecting pipe extending along the axial direction of the rotating disc, and the first connecting pipe is provided with a groove extending along the axial direction of the rotating disc;

[0022] The one end of the damper is provided with a second connecting pipe, the second connecting pipe is embedded in the first connecting pipe, and the one end of the elastic member is connected with the second connecting pipe.

[0023] The elastic mounting member further comprises a fastener provided on the first connecting pipe and opposite to the groove in the radial direction of the first connecting pipe to fasten the second connecting pipe and the first connecting pipe.

[0024] The water turbine according to the embodiment of the present application comprises:

[0025] A water turbine body having a fixed end and a rotating shaft; and

[0026] A speed measuring device according to any one of the above embodiments, the rotating disc is arranged on the rotating shaft to rotate synchronously with the rotating shaft, and the one end of the elastic mounting member is connected with the fixed end.

[0027] The water turbine according to the embodiment of the present application can detect whether the water turbine body has the peristalsis phenomenon and the rotating speed of the rotating shaft of the water turbine body in the peristalsis state, and has the accuracy of speed measurement and the safety in use.

[0028] The water turbine according to the embodiment of the present application comprises the water turbine.

[0029] The water turbine generator set according to the embodiment of the present application can detect whether the water turbine body has the peristalsis phenomenon and the rotating speed of the rotating shaft of the water turbine body in the peristalsis state, and has the accuracy of speed measurement and the safety in use. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 is one of the structural schematic diagrams of the water turbine according to the embodiment of the present application;

[0031] Figure 2 is a partial (rotating disc not shown) structural schematic diagram of the speed measuring device according to the embodiment of the present application;

[0032] Figure 3 is the second structural schematic diagram of the water turbine according to the embodiment of the present application (the first speed measuring sensor and the second speed measuring sensor are not shown);

[0033] Figure 4 is the third structural schematic diagram of the water turbine according to the embodiment of the present application (the first speed measuring sensor and the second speed measuring sensor are not shown);

[0034] Figure 5 is a partial structural schematic diagram of Figure 4 ;

[0035] REFERENCE NUMERALS:

[0036] Water turbine 1000;

[0037] speed measuring device 100;

[0038] elastic mounting member 1, roller 2, first detection hole 21, second speed sensor 3, second speed sensor 4, rotating disc 5, second detection hole 51;

[0039] elastic member 11, mounting seat 12, first connecting pipe 121, groove 1211, mounting frame 13, mounting plate 131, second through hole 1311, first through hole 132, damper 14, second connecting pipe 141, fastener 15;

[0040] water turbine body 200, fixed end 201, rotating shaft 202. DETAILED DESCRIPTION

[0041] Embodiments of the present application are described in detail below with reference to examples shown in the attached drawings. The embodiments described below by reference to the drawings are exemplary and are intended to explain the present application, and cannot be understood as limiting the present application.

[0042] As shown in Figures 1 to 5 , the water turbine 1000 according to the embodiment of the present application includes a water turbine body 200 and a speed measuring device 100.

[0043] The water turbine body 200 has a fixed end and a rotating shaft 202.

[0044] The speed measuring device 100 includes a rotating disc 5, an elastic mounting member 1, a roller 2 and a first speed sensor 3. The rotating disc 5 is arranged on the rotating shaft 202 of the water turbine body 200 to rotate synchronously with the rotating shaft 202. One end of the elastic mounting member 1 in the axial direction (for example, the up-down direction in Figure 1 ) of the rotating disc 5 is connected to the fixed end 201 of the water turbine body 200, and the other end of the elastic mounting member 1 in the axial direction of the rotating disc 5 is adjacent to the rotating disc 5. The roller 2 is rotatably arranged at the other end of the elastic mounting member 1, and the roller 2 abuts one side of the rotating disc 5 in the axial direction to be in driving connection with the rotating disc 5, the transmission ratio of the rotating disc 5 and the roller 2 is less than or equal to 0.2, the roller 2 is provided with first detection holes 21, and a plurality of first detection holes 21 are distributed equidistantly along the circumferential direction of the roller 2. The first speed sensor 3 is arranged at the other end of the elastic mounting member 1, and the first speed sensor 3 has a first probe, the first probe is opposite to the first detection holes 21 in the axial direction of the roller 2, and the first probe is spaced apart from the roller 2.

[0045] When the water turbine body 200 is in a stop state, the first speed sensor 3 is started. If the water turbine body 200 has a creep phenomenon, that is, the rotating shaft 202 rotates at a low speed, the rotating disc 5 rotates synchronously with the rotating shaft 202, thereby driving the roller 2 to rotate. Since the transmission ratio between the rotating disc 5 and the roller 2 is less than or equal to 0.2, that is, the rotating speed of the roller 2 driven by the rotating disc 5 is greater than that of the rotating disc 5, the rotating speed of the rotating disc 5 is amplified by the roller 2, the rotating speed of the roller 2 is obtained by the first speed sensor 3 through the signals emitted by the first probe and the detection of the plurality of first detection holes 21, and then the rotating speed of the rotating disc 5, that is, the rotating speed of the rotating shaft 202 is obtained, that is, the rotating of the rotating shaft 202 is detected and the creep phenomenon of the water turbine 1000 is detected.

[0046] The roller 2 of the speed measuring device 100 is in transmission connection with the rotating shaft 202 of the water turbine body 200 through the rotating disc 5, the rotating disc 5 rotates synchronously with the rotating shaft 202, and the large-angle rotation of the roller 2 driven by the small-angle rotation of the rotating disc 5 can make the first speed sensor 3 detect the rotating speed of the roller 2, and then the rotating speed of the rotating disc 5, that is, the rotating speed of the rotating shaft 202 is obtained through the transmission ratio between the rotating disc 5 and the roller 2.

[0047] The roller 2 abuts against one side of the rotating disc 5 in the axial direction and is in transmission connection with the rotating disc 5, the peripheral surface of the roller 2 abuts against the plane of the rotating disc 5, that is, the peripheral surface of the roller 2 is not in contact with the peripheral surface of the rotating disc 5, thereby avoiding the collision and impact of the radial (radial of the rotating shaft 202) vibration of the rotating shaft 202 at a high speed on the roller 2 and the first speed sensor 3 in the normal operation state of the water turbine body 200, and thereby ensuring the safety and detection accuracy of the first speed sensor 3.

[0048] The roller 2 is arranged at the other end of the elastic mounting member 1, and the one end of the elastic mounting member 1 is arranged at the fixed end of the water turbine body 200, that is, under the elastic force of the elastic mounting member 1, the roller 2 always abuts against the rotating disc 5.

[0049] In the normal operation state of the water turbine body 200, if the rotating shaft 202 has axial (axial of the rotating shaft 202) vibration, the rotating disc 5 moves in the axial direction with the rotating shaft 202, and under the elastic force of the elastic mounting member 1, the elastic mounting member 1 forms a force acting on the roller 2 towards the rotating disc 5, so that the roller 2 can move with the rotating disc 5 in the axial direction, that is, the elastic mounting member 1 is elongated or shortened with the change of the displacement of the rotating disc 5 in the axial direction, thereby avoiding the collision and impact of the axial vibration of the rotating shaft 5 on the roller 2 and the first speed sensor 3, and further ensuring the safety and detection accuracy of the first speed sensor 3.

[0050] Therefore, the speed measuring device 100 of the embodiment of the present application can detect the low-speed rotating speed of the rotating shaft 202 of the water turbine body 200, and the detection data of the first speed sensor 3 changes, so that the water turbine generator set can timely send an alarm to remind personnel to handle, thereby avoiding the wear of the water turbine body 200 due to the peristalsis phenomenon. Moreover, in the working state of the water turbine body 200, the speed measuring device 100 of the embodiment of the present application can avoid the collision and impact of the axial vibration and the radial vibration of the rotating shaft 202 on the roller 2 and the first speed sensor 3, thereby ensuring the safety of the roller 2 and the first speed sensor 3, ensuring the safety and service life of the speed measuring device 100 of the embodiment of the present application in the normal working state of the water turbine body 200, and ensuring the accuracy of the detection of the speed measuring device 100 of the embodiment of the present application in the non-working state of the water turbine body 200.

[0051] Therefore, the water turbine 1000 of the embodiment of the present application can detect whether the water turbine body 200 occurs the peristalsis phenomenon and the rotating speed of the rotating shaft 202 of the water turbine body 200 in the peristalsis state, and has the accuracy of speed measurement and the safety of use.

[0052] In order to make the technical scheme of the present application easier to understand, the up-down direction is taken as an example for description, which is the same as the axial direction of the rotating shaft 202, and the up-down direction is as shown in the figure. Figures 1 to 5

[0053] The water turbine 1000 of the embodiment of the present application comprises a water turbine body 200 and a speed measuring device 100.

[0054] The water turbine body 200 has a fixed end and a rotating shaft 202.

[0055] The speed measuring device 100 comprises a rotating disc 5, an elastic mounting member 1, a roller 2, a first speed sensor 3 and a second speed sensor 4.

[0056] The rotating disc 5 is arranged on the rotating shaft 202 of the water turbine body 200 to rotate synchronously with the rotating shaft 202. The axial direction of the rotating disc 5 is the same as the axial direction of the rotating shaft 202.

[0057] One end (upper end) of the elastic mounting member 1 in the axial direction of the rotating disc 5 is connected to the fixed end 201 of the water turbine body 200, and the other end (lower end) of the elastic mounting member 1 in the axial direction of the rotating disc 5 is adjacent to the rotating disc 5.

[0058] The roller 2 is rotatably arranged at the other end of the elastic mounting member 1, and the roller 2 abuts one side of the rotating disc 5 in the axial direction to be in transmission connection with the rotating disc 5. Under the action of the elastic force of the elastic mounting member 1, the roller 2 abuts the rotating disc 5. The transmission ratio of the rotating disc 5 and the roller 2 is less than or equal to 0.2. The first detection hole 21 is arranged on the roller 2, and a plurality of first detection holes 21 are distributed at equal intervals along the circumferential direction of the roller 2.

[0059] ​It should be noted that the transmission ratio i = D2 / D1 of the rotating disc 5 and the roller 2, wherein D1 is the diameter corresponding to the rotating path of the roller 2 on the rotating disc 5, and D2 is the diameter of the roller 2.

[0060] For example, the transmission ratio of the rotating disc 5 and the roller 2 is 0.2, and the roller 2 rotates five times when the rotating disc 5 rotates one time.

[0061] In other embodiments, the transmission ratio of the rotating disc 5 and the roller 2 is 0.1 or 0.15.

[0062] The first speed sensor 3 is arranged at the other end of the elastic mounting member 1, and the first speed sensor 3 has a first probe which is opposite to the first detection hole 21 in the axial direction of the roller 2 and is spaced apart from the roller 2. The first speed sensor 3 can detect the rotating speed of the rotating shaft 202 of the water turbine body 200 in the shutdown state.

[0063] Referring to Figure 3 As shown in the figure, the first detection hole 21 is a circular through hole. The diameter of the first detection hole 21 is 1.5 times the diameter of the first probe.

[0064] In some embodiments, the rotating disc 5 is provided with a second detection hole 51, and a plurality of second detection holes 51 are arranged at equal intervals in the circumferential direction of the rotating disc 5. The second speed sensor 4 is arranged at the other end of the elastic mounting member 1, and the second speed sensor 4 has a second probe which is opposite to the second detection hole 51 in the axial direction of the rotating disc 3 and is spaced apart from the rotating disc 5. In the working state of the water turbine body 200, the rotating shaft 202 rotates at high speed, and the rotating disc 5 rotates synchronously with the rotating shaft 202. The second speed sensor 4 detects the rotating speed of the rotating disc 5 through the signals emitted by the second probe and the detection of the plurality of second detection holes 51 which roll.

[0065] During the high-speed rotation of the rotating shaft 202, if the rotating shaft 202 has axial vibration, the rotating disc 5 will have displacement in the axial direction (the axial direction of the rotating shaft 202, that is, the axial direction of the rotating disc 5) with the rotating shaft 202. The second speed sensor 4 arranged at the other end of the elastic mounting member 1 moves with the elongation or shortening of the elastic mounting member 1, so as to keep the distance between the second speed sensor 4 and the rotating disc 5 unchanged, avoid the distance between the second speed sensor 4 and the rotating disc 5 being too large to exceed the working distance of the second speed sensor 4, and avoid the distance between the second speed sensor 4 and the rotating disc 5 being too small to cause the vibration of the rotating disc 5 to be transmitted to the second speed sensor 4, which causes the second probe to wear and the second speed sensor 4 to be damaged by the rotating disc 5, so as to ensure that the probe of the second speed sensor 4 detects the second detection hole 51 on the rotating disc 5 within the working distance, and ensure the accuracy of the detection of the second speed sensor 4.

[0066] The plurality of second detection holes 51 on the rotating disc 5 are distributed around the rotating shaft 202, the signal emitted by the probe of the second speed sensor 4 propagates along the axial direction of the rotating shaft 202, and the size of the second detection hole 51 can offset the influence of the horizontal vibration of the rotating shaft 202 on the propagation of the signal emitted by the second probe when the rotating disc 5 swings. That is, when the rotating disc 5 swings, the position of the second detection hole 51 will also swing, and since the second detection hole 51 has a certain size, the second detection hole 51 whose position swings can still allow the signal emitted by the probe to pass through, thereby avoiding the situation that the number of second detection holes 51 detected by the second speed sensor 4 is reduced, and ensuring the accuracy of the detection result of the second speed sensor 4.

[0067] Referring to Figure 4 As shown in the figure, the second detection hole 51 is a circular hole. Specifically, the diameter of the second detection hole 51 is three times the diameter of the second probe.

[0068] The speed measuring device 100 of the embodiment of the present application measures the rotating speed of the rotating disc 5, that is, the rotating speed of the rotating shaft 202 by arranging the second speed sensor 4 at the other end of the elastic mounting member 1 and arranging the second detection hole 51 on the rotating disc 5, and can avoid the problem that the probe of the speed measuring device is worn out or even damaged due to the impact of the rotating shaft 202 on the speed measuring device when the rotating shaft 202 swings axially and / or radially due to high-speed rotation, and the position of the detection tooth on the rotating shaft 202 and the position of the probe of the speed measuring device relatively move, resulting in missing teeth and inaccurate detection results when the speed measuring device detects.

[0069] The one side of the rotating disc 5 is provided with a friction surface, and the roller 2 is provided with a rubber layer which abuts against the friction surface. The friction surface and the rubber layer have a large friction force, which can ensure the effectiveness of the transmission of the movement between the rotating disc 5 and the roller 2.

[0070] Specifically, the knurling process can be used to roll out a mesh pattern on the plane of the one side of the rotating disc 5, so as to form the friction surface on the plane of the one side.

[0071] The elastic mounting 1 comprises an elastic member 11 and a mounting frame 13. The elastic member 11 is connected to the fixed end 201 of the water turbine body 200 at one end (upper end) in the axial direction of the rotating shaft 5, and the mounting frame 13 is connected to the elastic member 11 at the other end (lower end) in the axial direction of the rotating shaft 5, and the mounting frame 13 constitutes the other end of the elastic mounting 1. The elastic member 11 is stretchable in the axial direction of the rotating shaft 5, and the mounting frame 13 provides a mounting platform for the first speed sensor 3, the second speed sensor 4 and the roller 2. The mounting frame 13 is provided with a first through hole 132 extending in the axial direction of the roller 2, and the first probe of the first speed sensor 3 is opposite to the first through hole 132 in the axial direction of the roller 2 so that the signal emitted by the second probe can be radiated to the roller 2 or the first detection hole 21 of the roller 2 through the first through hole 132.

[0072] In the assembly of the speed measuring device 100, the elastic member 11 is in a compressed state so as to have elastic potential energy, that is, the elastic member 11 has a tendency to stretch, so as to make the elastic member 11 have a force acting on the mounting frame 13 towards the rotating shaft 5, thereby ensuring that the roller 2 can always abut against the rotating shaft 5.

[0073] In some embodiments, the elastic mounting 1 further comprises a mounting seat 12, a damper 14 and a fastener 15.

[0074] One end (upper end) of the mounting seat 12 is connected to the fixed end 201 of the water turbine body 200, and the other end (lower end) of the mounting seat 12 is connected to the one end (upper end) of the elastic member 11. The mounting seat 12 has a certain strength and hardness, which can ensure the convenience and strength of the connection between the elastic member 11 and the fixed end 201 of the water turbine body 200, and improve the overall strength of the elastic mounting 1, thereby improving the safety of the elastic mounting 1 of the embodiment of the application, and further improving the safety of the speed measuring device of the embodiment of the application.

[0075] Referring to Figure 1 As shown, the mounting seat 12 is spaced apart from the rotating shaft 202.

[0076] The damper 14 extends in the axial direction of the rotating shaft 5, and one end of the damper 14 in the axial direction of the rotating shaft 5 is connected to the other end of the mounting seat 12, and the other end of the damper 14 in the axial direction of the rotating shaft 5 is connected to the mounting frame 13.

[0077] The damping device 14 is arranged to, on one hand, synchronously stretch and contract with the mounting frame 13 when the mounting frame 13 is displaced (i.e. the elastic member 11 is stretched and contracted), increase the connecting strength between the mounting frame 13 and the mounting base 12 under the condition that the mounting frame 13 and the roller 2 are displaced with the rotating disc 5, thereby improving the strength of the elastic mounting member 1 and further improving the use safety of the elastic mounting member 1 and the use safety of the speed measuring device 100. On the other hand, the damping device 14 provides resistance in the movement process, increases the resistance of the mounting frame 13 when the mounting frame 13 is displaced with the rotating disc 5, i.e. consumes part of the kinetic energy of the rotating disc 5 when the rotating disc 5 vibrates with the rotating shaft 9, achieves the buffering effect, avoids the roller 2 from being temporarily separated from the rotating disc 5 due to the hysteresis of the roller 2 when the roller 2 is displaced with the rotating disc 5 (at the same time, the hysteresis of the elastic member 11 when the elastic member 11 is stretched and contracted), avoids the collision between the roller 2 on the mounting frame 13 and the rotating disc 5, further improves the use safety of the elastic mounting member 1 and the use safety of the speed measuring device 100.

[0078] Optionally, the elastic member 11 is a spring. The spring has simple structure and low cost, which can reduce the manufacturing cost of the elastic mounting member 1 and further reduce the manufacturing cost of the speed measuring device 100.

[0079] Optionally, the spring is sleeved on the damping device 14. The damping device 14 can guide the stretching and contracting deformation of the spring, avoid the deflection of the spring in the stretching and contracting process, and ensure the service life and use effect of the spring.

[0080] In some embodiments, the other end of the mounting base 12 is provided with a first connecting pipe 121 extending along the axial direction of the rotating disc 5, and the first connecting pipe 121 is provided with a groove 1211 extending along the axial direction of the rotating disc 5. One end of the damping device 14 is provided with a second connecting pipe 141, the second connecting pipe 141 is embedded in the first connecting pipe 121, and one end of the elastic member 11 is connected with the second connecting pipe 141. The fastener 15 is arranged on the first connecting pipe 121 and corresponds to the groove 1211 in the radial direction of the first connecting pipe 121 to fasten the second connecting pipe 141 and the first connecting pipe 121.

[0081] The fastener 15 can reduce the size of the groove 1211 of the first connecting pipe 121, i.e. reduce the inner diameter of the first connecting pipe 121, so as to fix the first connecting pipe 121 and the second connecting pipe 141 and improve the assembly convenience of the elastic mounting member 1.

[0082] When the distance between the mounting frame 13 and the mounting base 12 needs to be adjusted, the fastener 15 is loosened, the length of the second connecting pipe 141 in the first connecting pipe 121 is adjusted, and then the fastener 15 is tightened.

[0083] Specifically, referring to Figure 2 As shown, the fastener 15 is a clamp.

[0084] The mounting frame 13 is provided with a mounting plate 131, and the mounting plate 131 is provided with a second through hole 1311 extending in the axial direction of the rotating shaft 202. Each of the first speed measuring sensor 3 and the second speed measuring sensor 4 is arranged on the mounting plate 21, and the second probe of the second speed measuring sensor 4 is opposite to the second through hole 1311 in the axial direction of the rotating shaft 202, and the second probe of the second speed measuring sensor 4 is opposite to the second detection hole 51 in the axial direction of the rotating shaft 202. The signal emitted by the second probe of the second speed measuring sensor 4 is radiated to the rotating disc 5 through the second through hole 1311 or through the second detection hole 51, so as to detect the rotating speed of the rotating disc 5, so as to obtain the rotating speed of the rotating shaft 202.

[0085] The speed measuring device 100 of the embodiment of the present application can detect the rotating speed of the rotating shaft 202 in the working state of the water turbine body 200 through the second speed measuring sensor 4, and can also detect the rotating speed of the rotating shaft 202 in the non-working state of the water turbine body 200 through the first speed measuring sensor 3, that is, whether the peristalsis phenomenon occurs in the non-working state of the water turbine body 200, so as to timely remind the staff to process the peristalsis phenomenon, and avoid the damage of the water turbine body 200. Therefore, the speed measuring device 100 of the embodiment of the present application can replace the speed measuring device in the related art, realize the measurement of the rotating speed of the rotating shaft 202 of the water turbine body 200 in the working state and the detection of whether the low-speed rotation occurs in the non-working state, and has the accuracy of speed measurement and the safety in use.

[0086] Therefore, the water turbine 1000 of the embodiment of the present application not only can detect the rotating speed of the rotating shaft 202 in the normal working state, but also can detect the occurrence of the peristalsis phenomenon and the rotating speed of the rotating shaft 202 in the non-working state.

[0087] The water turbine generator set of the embodiment of the present application is described below.

[0088] The water turbine generator set of the embodiment of the present application comprises the water turbine 1000 of any one of the above embodiments. Therefore, the water turbine generator set of the embodiment of the present application has the technical effects of the above water turbine.

[0089] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention 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. Therefore, they should not be construed as limitations on this invention.

[0090] Furthermore, 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 at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0091] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; 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, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0092] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0093] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0094] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A speed measuring device, characterized in that, include: Turntable (5), the turntable (5) is used to be mounted on the shaft of the water turbine to rotate synchronously with the shaft; An elastic mounting member (1) is provided at one end of the turntable (5) in the axial direction for connecting the fixed end of the water turbine, and at the other end of the turntable (5) in the axial direction adjacent to the turntable (5). A roller (2) is rotatably disposed at the other end of the elastic mounting member (1). The roller (2) abuts against one side of the turntable (5) in its axial direction for transmission connection with the turntable (5). The circumferential surface of the roller (2) abuts against the plane of the turntable (5). The transmission ratio between the turntable (5) and the roller (2) is less than or equal to 0.

2. The roller (2) is provided with a first detection hole (21), and a plurality of first detection holes (21) are equally spaced along the circumferential direction of the roller (2). The first speed sensor (3) is located at the other end of the elastic mounting member (1). The first speed sensor (3) has a first probe. The first probe is opposite to the first detection hole (21) in the axial direction of the roller (2). The first probe is spaced apart from the roller (2). The turntable (5) is provided with a second detection hole (51), and a plurality of second detection holes (51) are arranged at equal intervals along the circumference of the turntable (5); The speed measuring device further includes a second speed sensor (4), which is disposed on the other end of the elastic mounting member (1). The second speed sensor (4) has a second probe, which is opposite to the second detection hole (51) in the axial direction of the turntable (5). The second probe is spaced apart from the turntable (5).

2. The speed measuring device according to claim 1, characterized in that, The turntable (5) has a friction surface on one side, and the roller (2) has a rubber layer that abuts against the friction surface.

3. The speed measuring device according to claim 1, characterized in that, The resilient mounting element (1) includes: An elastic element (11) is provided at one end of the turntable (5) in the axial direction for connecting to the fixed end of the water turbine. Mounting bracket (13), which is connected to the elastic member (11) at the other end of the turntable (5) in the axial direction, forms the other end of the elastic mounting member (1).

4. The speed measuring device according to claim 3, characterized in that, The elastic mounting member (1) further includes a mounting base (12), one end of which is used to connect to the fixed end of the water turbine, and the other end of which is connected to one end of the elastic member (11).

5. The speed measuring device according to claim 4, characterized in that, The resilient mounting element (1) further includes a damper (14) extending axially along the turntable (5), with one end of the damper (14) in the axial direction of the turntable (5) connected to the other end of the mounting base (12), and the other end of the damper (14) in the axial direction of the turntable (5) connected to the mounting bracket (13).

6. The speed measuring device according to claim 5, characterized in that, The elastic element (11) is a spring; the spring is sleeved on the damper (14).

7. The speed measuring device according to claim 5, characterized in that, The other end of the mounting base (12) is provided with a first connecting pipe (121) extending axially along the turntable (5), and the first connecting pipe (121) is provided with a groove (1211) extending axially along the turntable (5). The damper (14) has a second connecting tube (141) at one end, which is embedded in the first connecting tube (121), and the elastic element (11) is connected to the second connecting tube (141) at one end. The resilient mounting member (1) further includes a fastener (15) which is disposed on the first connecting tube (121) and is opposite to the groove (1211) in the radial direction of the first connecting tube (121) to fasten the second connecting tube (141) and the first connecting tube (121).

8. A water turbine, characterized in that, include: A turbine body, the turbine body having a fixed end and a rotating shaft; and The speed measuring device is the speed measuring device according to any one of claims 1 to 7, wherein the turntable (5) is disposed on the rotating shaft to rotate synchronously with the rotating shaft, and one end of the elastic mounting member (1) is connected to the fixed end.

9. A hydro-generator set, characterized in that, Includes the water turbine as described in claim 8.

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