Dynamic runout detection device for main shaft of water turbine

Abstract

The utility model provides a dynamic runout detection device for a water turbine main shaft, which comprises a main shaft detection mechanism and a lifting mechanism, the detection height of the main shaft detection mechanism can be changed through the lifting mechanism, the detection of the axial and longitudinal runout of the main shaft is realized, and the detection accuracy of the runout value of the main shaft is improved; the main shaft detection mechanism comprises an upper shell, a lower shell, a transmission assembly, a measurement assembly and a sensing element; wherein the upper shell is of a semi-surrounding structure, a ball plunger is fixed to the front end of the transmission assembly, the ball plunger penetrates through the front end of the upper shell to be located outside and makes contact with a main shaft of the water turbine, and the front end of the upper shell is arranged to be of a closed structure, so that the transmission shaft and the ball plunger can be effectively protected; damage of high-speed rotation of the main shaft to the transmission shaft and the detection assembly is avoided; the measuring assembly and the sensing element are in contact with the transmission assembly and are used for transmitting a main shaft jumping value; meanwhile, the lifting mechanism is arranged, so that people can detect away from the main shaft, and safety problems in operation are avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of measuring devices, and in particular relates to a dynamic runout detection device for a main shaft of a water turbine. Background Art

[0002] In a hydropower station, water from the upstream reservoir is led to the turbine through a water diversion pipe, which drives the turbine runner to rotate and drives the generator to generate electricity. The water that has completed the work is discharged downstream through the tailwater pipe. The turbine main shaft is the core component of the turbine. It is the mechanical main shaft that carries the turbine rotor and impeller in the turbine. It is used to carry the force and torque of the rotor, maintain the rotation balance of the rotor, and realize variable speed regulation.

[0003] In the existing turbine main shaft detection device, one or more rollers are often used to contact the main shaft to detect dynamic runout. In actual operation, pre-pressure loss is easily caused by multiple rollers. At the same time, the exposure of part of the structure increases the huge impact force of the high-speed rotating turbine main shaft on the device structure, reducing the service life of the detection components. In addition, the existing turbine main shaft detection device usually does not have a fixed installation structure, or the fixed structure is not suitable for a conventional turbine main shaft (for example, a conventional turbine main shaft does not have magnetic attraction conditions). As a result, when using the existing turbine main shaft detection device, operators often need to stand near the turbine main shaft to perform manual handheld detection, which greatly tests the operator's operating requirements and increases the risk of operators. It is not conducive to the operator's actual operation of the dynamic runout of the turbine main shaft.

[0004] Therefore, how to provide a turbine main shaft dynamic runout detection device that can improve the detection range, accuracy and detection efficiency of turbine main shaft runout while reducing the operating difficulty and operating risk of operators is a technical problem that technical personnel in this field urgently need to solve. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a device for detecting dynamic vibration of a main shaft of a water turbine, so as to at least solve one of the above technical problems.

[0006] In order to solve the above technical problems, the utility model provides a device for detecting dynamic vibration of a main shaft of a water turbine, the detection device comprising: a main shaft detection mechanism, the main shaft detection mechanism comprising an upper shell, a lower shell, a transmission assembly, a measuring assembly and a sensor element; the upper shell is threadedly connected to the lower shell and can be assembled to form an accommodating space, wherein the upper shell is a semi-enclosed structure so that the upper shell and the side end surface of the lower shell are covered when the upper shell is combined with the lower shell; the transmission assembly, the measuring assembly and the sensor element are all arranged in the accommodating space; a ball plunger is fixed at the front end of the transmission assembly, the ball plunger passes through the front end of the upper shell and is located outside, an adjusting knob is connected to the rear end of the transmission assembly, the measuring assembly and the sensor element are both fixedly connected to the upper shell and are in contact with the transmission assembly; the front end of the transmission assembly is an end in contact with the main shaft of the water turbine; a lifting mechanism, the lifting mechanism comprising a supporting platform, a plurality of first threaded holes are opened on the supporting platform, and the supporting platform is threadedly connected to the lower shell through the first threaded holes.

[0007] Optionally, the lifting mechanism also includes a screw rod, a bracket, a base and a crank handle; the fixed end of the supporting platform is sleeved and fixed on the screw rod, the upper and lower ends of the screw rod are respectively fixedly connected to the bracket, the bracket is fixedly connected to the base, and the crank handle is connected to the top of the bracket and the screw rod; wherein the supporting platform is arranged perpendicular to the screw rod.

[0008] Optionally, a first bevel gear is disposed at the upper end of the screw rod, a second bevel gear is disposed at the end of the rocker handle fixed to the bracket, and the first bevel gear is meshingly connected with the second bevel gear.

[0009] Optionally, a plurality of second threaded holes are formed at the bottom of the base, and the base is threadedly connected to the main shaft of the turbine through the plurality of second threaded holes.

[0010] Optionally, the transmission assembly includes: a transmission shaft, the ball head plunger is fixed on the front end of the transmission shaft, the middle part of the transmission shaft is sequentially sleeved with a first bearing, a shock-absorbing spring and a second bearing, and the outer sleeves of the first bearing, the shock-absorbing spring and the second bearing are installed with a bearing sleeve; a connecting plate, the middle part of the connecting plate is provided with a threaded hole; an adjusting rod, one end of the adjusting rod passes through the threaded hole and is sequentially threadedly connected to the connecting plate and the rear end of the transmission shaft, and the other end of the adjusting rod is connected to the adjusting knob; a return spring, the return spring is sleeved on the adjusting rod, and the two ends of the return spring are respectively abutted against the connecting plate and the lower shell; wherein, the upper shell and the lower shell are both provided with a plurality of support frames compatible with the transmission shaft and the bearing sleeve, so that the transmission shaft and the bearing sleeve are fixedly installed inside the accommodating space through the plurality of support frames.

[0011] Optionally, a central channel is opened through the front end of the upper shell, the ball plunger passes through the central channel and is located outside the upper shell, and the conduction section of the transmission shaft is located in the central channel; the conduction section is located between the ball plunger and the first bearing.

[0012] Optionally, a slide rail is provided on the lower shell, and the bottom of the connecting plate is slidably connected to the slide rail; the setting direction of the slide rail is consistent with the axial direction of the transmission shaft.

[0013] Optionally, the measuring assembly includes a micrometer, the measuring end of the micrometer is in contact with the first surface of the top of the connecting plate; wherein, an observation groove is opened on the top surface of the upper shell, the observation groove is connected with the interior of the accommodating space, and the micrometer is installed and fixed on the observation groove.

[0014] Optionally, the sensing element includes a displacement sensor, which is fixedly connected to the upper shell, and a sensing end of the displacement sensor is in contact with a second surface of the top of the connecting plate; the second surface is a surface opposite to the first surface.

[0015] Optionally, the lifting mechanism is further provided with a driving motor and a controller, the driving motor is used to drive the screw rod to rotate, and the controller is communicatively connected with the driving motor.

[0016] Beneficial effects:

[0017] The utility model provides a device for detecting dynamic vibration of a main shaft of a water turbine, comprising a main shaft detection mechanism and a lifting mechanism. The main shaft detection mechanism can be fixed on a supporting platform, and the detection height of the main shaft detection mechanism can be changed by adjusting the lifting mechanism, so as to detect the vibration of the main shaft at different points in the axial direction and longitudinal direction of the main shaft at the same time, thereby improving the detection accuracy of the main shaft vibration value; by designing the upper shell as a semi-enclosed structure, when the upper shell and the lower shell are assembled and installed, the upper surface and the side end surface of the lower shell are covered by the upper shell, so that the front end of the entire main shaft detection mechanism is in a closed structure, which can effectively protect the transmission shaft and the ball plunger, and avoid the huge impact force of the high-speed rotating main shaft on the transmission shaft, thereby causing damage to the micrometer; at the same time, the device used in the present application for contacting with the main shaft of the water turbine The detected component is a ball plunger, which is in close contact with the main shaft of the turbine by setting the ball plunger, so that the transmission direction of the transmission shaft can be perpendicular to the radial direction of the main shaft, thereby improving the measurement accuracy; and the detection head is a sphere, which can reduce the influence of local surface roughness and high-speed rotation of the main shaft on the measurement accuracy, reduce the pre-pressure loss or dispersion caused by the use of rollers in the existing detection device, and greatly improve the detection accuracy and efficiency; at the same time, by setting a lifting mechanism for changing the detection height of the main shaft detection mechanism, in addition to improving the detection range and flexibility of the main shaft runout, it also avoids the disadvantages of manual hand-holding in the existing detection device, avoids the safety problems and operation risks caused by manual hand-holding close to the main shaft of the turbine, and realizes that the operator is away from the main shaft for detection, which is beneficial to the actual measurement operation of the operator;

[0018] In this way, the accuracy and efficiency of the dynamic vibration detection of the turbine main shaft are improved through the setting of the above-mentioned device, the loss of sensor pressure and the damage to the measuring components are reduced, and at the same time, the measurement of the longitudinal vibration of the turbine main shaft is realized through the setting of the lifting mechanism, which reduces the risks generated by the operator during the actual detection process and improves the safety and stability of the operation process.

[0019] The above description is only an overview of the technical solution of the utility model. In order to more clearly understand the technical means of the utility model, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of this specification or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 A schematic diagram of the overall structure of a device for detecting dynamic vibration of a main shaft of a turbine provided in an embodiment of the present application;

[0022] Figure 2 A schematic diagram of the partial structure of a device for detecting dynamic vibration of a main shaft of a turbine provided in an embodiment of the present application;

[0023] Figure 3 A schematic diagram of a partial structure of a spindle detection mechanism provided in an embodiment of the present application;

[0024] Figure 4 A top view of the cross-sectional structure of the spindle detection mechanism provided in an embodiment of the present application;

[0025] Figure 5 A schematic diagram of the structure of the lifting mechanism provided in the embodiment of the present application;

[0026] Figure 6 A schematic diagram of the top view of the lifting mechanism provided in an embodiment of the present application;

[0027] Reference numerals:

[0028] 1—spindle detection mechanism; 2—lifting mechanism; 3—upper housing; 4—lower housing; 5—transmission assembly; 6—measuring assembly; 7—sensing element; 8—ball plunger; 9—adjusting knob; 10—supporting platform; 11—first threaded hole; 12—screw rod; 13—bracket; 14—base; 15—crank handle; 16—first bevel gear; 17—second bevel gear; 18—second threaded hole; 19—transmission shaft; 20—connecting plate; 21—adjusting rod; 22—reset spring; 23—first bearing; 24—shock-absorbing spring; 25—second bearing; 26—bearing sleeve; 27—centering channel; 28—conduction section; 29—slide rail; 30—micrometer; 31—observation slot; DETAILED DESCRIPTION

[0029] 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 of 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.

[0030] See also Figure 1-6The present embodiment provides a device for detecting the dynamic vibration of a main shaft of a water turbine, the detection device comprising: a main shaft detection mechanism 1, the main shaft detection mechanism 1 comprising an upper shell 3, a lower shell 4, a transmission assembly 5, a measuring assembly 6 and a sensor element 7; the upper shell 3 is threadedly connected with the lower shell 4, and can be assembled and installed to form an accommodating space, wherein the upper shell 3 is a semi-enclosed structure, so that the upper shell 3 and the lower shell 4 are combined to cover the upper surface and the side end surface of the lower shell 4; the transmission assembly 5, the measuring assembly 6 and the sensor element 7 are all arranged in the accommodating space. The front end of the transmission assembly 5 is fixed with a ball plunger 8, which passes through the front end of the upper shell 3 and is located outside. The rear end of the transmission assembly 5 is connected with an adjusting knob 9. The measuring assembly 6 and the sensor element 7 are fixedly connected to the upper shell 3 and are in contact with the transmission assembly 5. The front end of the transmission assembly 5 is the end in contact with the main shaft of the turbine. The lifting mechanism 2 includes a supporting platform 10, and a plurality of first threaded holes 11 are opened on the supporting platform 10, and the supporting platform 10 is threadedly connected with the lower shell 4 through the first threaded holes 11.

[0031] Specifically, the utility model provides a device for detecting the dynamic vibration of a main shaft of a turbine, which is provided with a main shaft detection mechanism 1 and a lifting mechanism 2. The main shaft detection mechanism 1 can be fixed on a supporting platform 10, and the detection height of the main shaft detection mechanism 1 can be changed by adjusting the lifting mechanism 2, so as to detect the vibration of the main shaft at different points in the axial direction and the longitudinal direction of the main shaft at the same time, thereby improving the detection accuracy of the main shaft vibration value; through the arrangement of the upper shell 3 and the lower shell 4, it is convenient to assemble and disassemble, and it is also convenient to replace and repair the internal structure; at the same time, the upper shell 3 is designed as a semi-enclosed structure. When the upper shell 3 and the lower shell 4 are assembled and installed, the upper surface and the side end surface of the lower shell 4 are covered by the upper shell 3, so that the front end of the entire main shaft detection mechanism 1 is in a closed structure, thereby effectively protecting the transmission shaft 19 and the ball plunger 8, and avoiding the huge impact force of the high-speed rotating main shaft on the transmission shaft 19, thereby causing damage to the micrometer 30 damage; at the same time, the component used for contact detection with the turbine main shaft in the present application is the ball head plunger 8. By setting the ball head plunger 8 in close contact with the turbine main shaft, it can be ensured that the transmission direction of the transmission shaft 19 is perpendicular to the radial direction of the main shaft, thereby improving the measurement accuracy; and the detection head is a sphere, which can reduce the influence of local surface roughness and high-speed rotation of the main shaft on the measurement accuracy, reduce the pre-pressure loss or dispersion caused by the use of rollers in the existing detection device, and greatly improve the detection accuracy and efficiency; at the same time, by setting a lifting mechanism 2 for changing the detection height of the main shaft detection mechanism 1, in addition to improving the detection range and flexibility of the main shaft runout, it also avoids the disadvantages of manual hand-held in the existing detection device, avoids the safety problems and operation risks caused by manual hand-held operation close to the turbine main shaft, and realizes that the operator is away from the main shaft for detection, improves the safety and stability of the operation process, and is beneficial to the actual measurement operation of the operator.

[0032] In some possible embodiments, the lifting mechanism 2 also includes a screw rod 12, a bracket 13, a base 14 and a crank handle 15; the fixed end of the supporting platform 10 is sleeved and fixed on the screw rod 12, the supporting platform 10 and the screw rod 12 are arranged vertically, the upper and lower ends of the screw rod 12 are respectively fixedly connected to the bracket 13, the bracket 13 is fixedly connected to the base 14, and the crank handle 15 is connected to the top of the bracket 13 and the screw rod 12.

[0033] Specifically, if Figure 5-6 As shown, the lifting mechanism 2 is also provided with a screw 12, a bracket 13, a base 14 and a crank handle 15. When in use, the operator can drive the rotation of the screw 12 by operating the crank handle 15, thereby realizing the lifting and lowering of the supporting platform 10, driving the supporting platform 10 and the main shaft detection mechanism 1 to move up and down to change the height, thereby realizing the longitudinal multi-point measurement of the turbine main shaft, and at the same time ensuring that the operator maintains a certain distance when detecting the main shaft, thereby reducing the operation risk; through the setting of the base 14, the lifting mechanism 2 and the main shaft detection mechanism 1 can be firmly fixed to the base 14 of the turbine main shaft, replacing the method of manually holding the main shaft detection mechanism 1 in traditional detection, thereby reducing the difficulty of operation during the detection process and improving the detection efficiency and stability.

[0034] In some possible implementations, a first bevel gear 16 is disposed at the upper end of the screw rod 12 , a second bevel gear 17 is disposed at one end of the rocker handle 15 fixed to the bracket 13 , and the first bevel gear 16 is meshedly connected with the second bevel gear 17 .

[0035] Specifically, if Figure 5-6 As shown, during use, the operator can drive the screw 12 to rotate by operating the crank handle 15, thereby driving the supporting platform 10 and the main shaft detection mechanism 1 to move up and down to change the height, thereby realizing the longitudinal multi-point measurement of the turbine main shaft.

[0036] In some possible implementations, a plurality of second threaded holes 18 are formed at the bottom of the base 14 , and the base 14 is threadedly connected to the main shaft of the turbine through the plurality of second threaded holes 18 .

[0037] Specifically, by setting the second threaded hole 18, the base 14 is fastened to the turbine main shaft or the base 14 of the turbine main shaft, replacing the method of manually holding the main shaft detection mechanism 1 in traditional detection.

[0038] In some possible embodiments, the transmission assembly 5 includes: a transmission shaft 19, a ball plunger 8 is fixed to the front end of the transmission shaft 19, a first bearing 23, a shock-absorbing spring 24 and a second bearing 25 are sleeved in sequence in the middle of the transmission shaft 19, and a bearing sleeve 26 is sleeved on the outside of the first bearing 23, the shock-absorbing spring 24 and the second bearing 25; a connecting plate 20, a threaded hole is opened in the middle of the connecting plate 20; an adjusting rod 21, one end of the adjusting rod 21 passes through the threaded hole and is threadedly connected to the connecting plate 20 and the rear end of the transmission shaft 19 in sequence, and the other end of the adjusting rod 21 is connected to the adjusting knob 9; a reset spring 22, the reset spring 22 is sleeved on the adjusting rod 21, and the two ends of the reset spring 22 are respectively abutted against the connecting plate 20 and the lower shell 4; wherein, the upper shell 3 and the lower shell 4 are both provided with a plurality of support frames adapted to the transmission shaft 19 and the bearing sleeve 26, so that the transmission shaft 19 and the bearing sleeve 26 are fixedly installed inside the accommodating space through the plurality of support frames.

[0039] Specifically, if Figure 3-4 As shown, the transmission shaft 19, the first bearing 23, the shock absorbing spring 24, the second bearing 25 and the bearing sleeve 26 are arranged to transmit the vibration value of the turbine main shaft received by the ball plunger 8; when working, the ball plunger 8 contacts the main shaft of the hydropower station, and the ball plunger 8 can jump along with the vibration of the turbine main shaft, and transmit the vibration to the transmission shaft 19, the first bearing 23, the shock absorbing spring 24 and the second bearing 25, and further transmit the vibration feedback to the measuring component 6 and the sensor element 7 through the connecting plate 20; through the shock absorbing spring 24 The setting can realize the overall reset and shock absorption of the ball head plunger 8 and the conduction section 28 of the transmission shaft 19, and can ensure the close contact between the ball head plunger 8 and the main shaft of the hydropower station under the pre-pressure provided by the shock-absorbing spring 24, thereby improving the accuracy of detection; at the same time, through the setting of multiple bearings, the error of the transmission of the turbine main shaft runout value is reduced, and the transmission process is guaranteed to overlap with the theoretical center of the turbine main shaft; in addition, through the setting of the reset spring 22, the position of the connecting plate 20 can be kept balanced during operation, thereby ensuring the measurement accuracy and reducing the loss of the device.

[0040] In some possible embodiments, a central channel 27 is opened through the front end of the upper shell 3, the ball plunger 8 passes through the central channel 27 and is located outside the upper shell 3, and the conduction section 28 of the transmission shaft 19 is located in the central channel 27; the conduction section 28 is located between the ball plunger 8 and the first bearing 23.

[0041] Specifically, if Figure 4As shown, since there is a risk of causing the ball plunger 8 and the conduction section 28 of the transmission shaft 19 to deviate when the turbine main shaft rotates at a high speed, which may cause instability in the vibration detection of the turbine main shaft, a central channel 27 is opened through the front end of the upper shell 3 to place the conduction section 28 of the transmission shaft 19, so as to avoid the front end of the transmission shaft 19 being driven by the vibration of the turbine main shaft during the detection process and causing deviation and rotation, and keep the front end of the moving shaft, i.e., the ball plunger 8 and the conduction section 28 of the transmission shaft 19, always located at the theoretical center of the main shaft for detection, thereby improving the detection accuracy.

[0042] In some possible implementations, a slide rail 29 is disposed on the lower shell 4 , and the bottom of the connecting plate 20 is slidably connected to the slide rail 29 ; the setting direction of the slide rail 29 is consistent with the axial direction of the transmission shaft 19 .

[0043] Specifically, if Figure 3-4 As shown, during actual operation, the operator can adjust the position of the connecting plate 20 by turning the adjusting knob 9 and driving the connecting plate 20 to slide axially relative to the slide rail 29 through the adjusting rod 21, thereby ensuring that the top end of the connecting plate 20 is in close contact with the measuring end of the micrometer 30 and the sensing end of the displacement sensor; in addition, when reading, the position of the pointer on the micrometer 30 can be fine-tuned by fine-tuning the position of the connecting plate 20, which is convenient for the operator to read; thereby reducing the error during measurement and facilitating the operator to make adjustments.

[0044] In some possible embodiments, the measuring assembly 6 includes a micrometer 30, the measuring end of the micrometer 30 is in contact with the first surface of the top of the connecting plate 20; wherein, an observation groove 31 is opened on the top surface of the upper shell 3, the observation groove 31 is connected to the interior of the accommodating space, and the micrometer 30 is installed and fixed on the observation groove 31.

[0045] Specifically, through the setting of the micrometer 30, the detection accuracy is improved compared with the traditional dial gauge, which is convenient for operators to read and improves the accuracy of the numerical values; at the same time, by opening an observation groove 31 on the top surface of the upper shell 3 and fixing the micrometer 30 on the observation groove 31, it is convenient for operators to intuitively read the runout value of the turbine main shaft from the device, which greatly improves the convenience of the degree.

[0046] In some possible implementations, the sensing element 7 includes a displacement sensor, which is fixedly connected to the upper shell 3, and a sensing end of the displacement sensor is in contact with a second surface of the top of the connecting plate 20; the second surface is a surface opposite to the first surface.

[0047] Specifically, by setting up the displacement sensor, it is convenient to detect the displacement caused by the vibration of the turbine main shaft in real time.

[0048] In some possible implementations, the lifting mechanism 2 is further provided with a driving motor and a controller. The driving motor is used to drive the screw rod 12 to rotate, and the controller is communicatively connected with the driving motor.

[0049] Specifically, the lifting mechanism 2 can be provided with a drive motor and a controller to further enable the operator to remotely adjust the height of the lifting mechanism 2. At the same time, the setting of the drive motor and the controller can replace the manual crank handle 15, thereby improving the accuracy of height adjustment, reducing the operating difficulty of the operator, and making the main shaft detection mechanism 1 more accurate and convenient in detecting different longitudinal points of the turbine main shaft.

[0050] Finally, it should be noted that the above embodiments are only specific implementation methods of the utility model, which are used to illustrate the technical solution of the utility model, rather than to limit it. The protection scope of the utility model is not limited thereto. Although the utility model is described in detail with reference to the above embodiments, ordinary technicians in this field should understand that any technician familiar with the technical field can still modify the technical solution recorded in the above embodiments within the technical scope disclosed by the utility model, or can easily think of changes, or make equivalent replacements for some of the technical features therein; and these modifications, changes or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiment of the utility model. They should all be included in the protection scope of the utility model. Therefore, the protection scope of the utility model shall be based on the protection scope of the claims.

[0051] Although the implementation scheme of the utility model has been disclosed as above, it is not limited to the applications listed in the specification and implementation modes. It can be fully applied to various fields suitable for the utility model. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the utility model is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A device for detecting dynamic vibration of a main shaft of a water turbine, characterized in that: The detection device comprises: A spindle detection mechanism (1), the spindle detection mechanism (1) comprising an upper shell (3), a lower shell (4), a transmission assembly (5), a measuring assembly (6) and a sensor element (7); the upper shell (3) and the lower shell (4) are threadedly connected and can be assembled to form an accommodating space, wherein the upper shell (3) is a semi-enclosed structure so that when the upper shell (3) and the lower shell (4) are assembled, the upper surface and the side end surface of the lower shell (4) are covered; the transmission assembly (5), the measuring assembly (6) and the sensor element (7) are connected to the upper shell (3) and the lower shell (4) by a threaded connection. 6) and the sensing element (7) are arranged in the accommodating space; a ball plunger (8) is fixed at the front end of the transmission assembly (5), the ball plunger (8) passes through the front end of the upper shell (3) and is located outside; an adjusting knob (9) is connected to the rear end of the transmission assembly (5); the measuring assembly (6) and the sensing element (7) are fixedly connected to the upper shell (3) and are in contact with the transmission assembly (5); the front end of the transmission assembly (5) is the end in contact with the main shaft of the turbine; A lifting mechanism (2), the lifting mechanism (2) comprising a supporting platform (10), the supporting platform (10) being provided with a plurality of first threaded holes (11) and being threadedly connected to the lower shell body (4) via the first threaded holes (11).

2. The detection device according to claim 1, characterized in that: The lifting mechanism (2) further comprises a screw rod (12), a bracket (13), a base (14) and a crank handle (15); the fixed end of the supporting platform (10) is sleeved and fixed on the screw rod (12), the upper and lower ends of the screw rod (12) are respectively fixedly connected to the bracket (13), the bracket (13) is fixedly connected to the base (14), and the crank handle (15) is connected to the top end of the bracket (13) and the screw rod (12); wherein the supporting platform (10) and the screw rod (12) are arranged perpendicularly.

3. The detection device according to claim 2, characterized in that: A first bevel gear (16) is disposed at the upper end of the screw rod (12), a second bevel gear (17) is disposed at one end of the rocker handle (15) fixed to the bracket (13), and the first bevel gear (16) is meshingly connected with the second bevel gear (17).

4. The detection device according to claim 3, characterized in that: A plurality of second threaded holes (18) are formed at the bottom of the base (14), and the base is threadedly connected to the main shaft of the water turbine via the plurality of second threaded holes (18).

5. The detection device according to claim 4, characterized in that: The transmission assembly (5) comprises: A transmission shaft (19), wherein the ball plunger (8) is fixed at the front end of the transmission shaft (19), and a first bearing (23), a shock absorbing spring (24) and a second bearing (25) are sleeved in sequence at the middle of the transmission shaft (19), and a bearing sleeve (26) is sleeved outside the first bearing (23), the shock absorbing spring (24) and the second bearing (25); A connecting plate (20), wherein a threaded hole is formed in the middle of the connecting plate (20); an adjusting rod (21), one end of the adjusting rod (21) passing through the threaded hole and being threadedly connected to the connecting plate (20) and the rear end of the transmission shaft (19) in sequence, and the other end of the adjusting rod (21) being connected to the adjusting knob (9); A return spring (22), wherein the return spring (22) is sleeved on the adjustment rod (21), and two ends of the return spring (22) are respectively in contact with the connecting plate (20) and the lower shell (4); The upper shell (3) and the lower shell (4) are both provided with a plurality of support frames that are compatible with the transmission shaft (19) and the bearing sleeve (26), so that the transmission shaft (19) and the bearing sleeve (26) are fixedly installed inside the accommodating space through the plurality of support frames.

6. The detection device according to claim 5, characterized in that: A central channel (27) is formed through the front end of the upper shell (3); the ball plunger (8) passes through the central channel (27) and is located outside the upper shell (3); the transmission section (28) of the transmission shaft (19) is located inside the central channel (27); and the transmission section (28) is located between the ball plunger (8) and the first bearing (23).

7. The detection device according to claim 6, characterized in that: The lower shell (4) is provided with a slide rail (29), and the bottom of the connecting plate (20) is slidably connected to the slide rail (29); the setting direction of the slide rail (29) is consistent with the axial direction of the transmission shaft (19).

8. The detection device according to claim 7, characterized in that: The measuring assembly (6) comprises a micrometer (30), the measuring end of the micrometer (30) being in contact with the first surface of the top of the connecting plate (20); wherein an observation groove (31) is provided on the top surface of the upper shell (3), the observation groove (31) being communicated with the interior of the accommodating space, and the micrometer (30) being mounted and fixed on the observation groove (31).

9. The detection device according to claim 8, characterized in that: The sensing element (7) comprises a displacement sensor, the displacement sensor is fixedly connected to the upper shell (3), and the sensing end of the displacement sensor is in contact with the second surface of the top of the connecting plate (20); the second surface is a surface opposite to the first surface.

10. The detection device according to any one of claims 2 to 9, characterized in that: The lifting mechanism (2) is also provided with a driving motor and a controller, the driving motor is used to drive the screw rod (12) to rotate, and the controller is communicatively connected with the driving motor.

Images