High-reliability water turbine detection device and method

Abstract

The invention discloses a high-reliability water turbine detection device and method. The high-reliability water turbine detection device comprises a main shaft detection mechanism and a rotating wheel detection mechanism, and the main shaft detection mechanism comprises a double-shaft carrying assembly and a main shaft connecting assembly. According to the main shaft detection mechanism, the rotation condition of the shaft column is read through the encoder, whether the main shaft has a wriggling phenomenon or not can be judged, when the water turbine normally operates, the rotating disc is driven to rotate, and if the main shaft deviates and shakes, detection on the main shaft is more comprehensive and more reliable; the scanning assembly is composed of the middle arm, the stretching-in arm and the supporting arm, the middle arm, the stretching-in arm and the supporting arm can be in a straight shape, the shape can better enter the water turbine from a small hole site, the requirement for entering the hole site is low, the main shaft connecting assembly is matched to drive the rotating wheel to rotate for scanning, and therefore the blue light scanning head does not need to rotate around the rotating wheel; a large moving space is not needed, so that detection can be carried out without dismounting the water turbine shell, and the detection is more convenient and faster.

Description

Technical Field

[0001] The invention relates to the technical field of water turbine detection, and in particular to a water turbine detection device and method with high reliability. Background Art

[0002] A water turbine is a power machine that converts the energy of water flow into rotational mechanical energy. It belongs to the turbine machinery among fluid machinery. Most modern water turbines are installed in hydropower stations to drive generators to generate electricity. In a hydropower station, water from the upstream reservoir is led to the water turbine through a water diversion pipe, which drives the water turbine runner to rotate and drives the generator to generate electricity. The water that has done work is discharged downstream through the tailwater pipe. The higher the head and the greater the flow, the greater the output power of the water turbine. The runner is the working structure of the water turbine and is susceptible to wear. The wear of the runner will affect the work quality and cause the guide vanes on the runner to have closing defects. When the guide vanes are closed during shutdown, water leakage will occur, causing the runner to rotate slowly and damage the bearings on the main shaft. Therefore, it is necessary to inspect the water turbine regularly; for example, authorized The Chinese invention patent with the announcement number CN209308882U discloses a turbine creep detection device, which includes a base plate, a support frame, a guide frame, a fork, a flywheel, a rotary encoder and an electromagnetic valve. The support frame and the guide frame are fixedly installed at intervals on the upper end of the base plate. The middle of the support frame and the guide frame are both provided with transverse coaxial through holes and a fork is coaxially installed. One end of the fork extends out of the support frame. The end of the fork is provided with upper and lower double-layer fork pieces. The middle of the upper and lower double-layer fork pieces is provided with a coaxially rotating mounting shaft through a bearing. A flywheel is coaxially fixed on the shaft between the upper and lower double-layer fork pieces. The upper end of the shaft extends out of the fork and is connected to a rotary encoder. The other end of the fork is guided and movably installed in the guide frame. However, the existing turbine detection device has the following defects:

[0003] The above-mentioned detection device reads the spindle creep through the encoder to determine the guide vane closure problem of the impeller. However, in addition to the wear of the impeller, the spindle of the turbine will also wear, resulting in the phenomenon of offset and jitter when the spindle rotates. The above-mentioned detection device cannot detect the spindle offset phenomenon, is not comprehensive, and makes the detection unreliable; when detecting the impeller, the existing detection device mostly uses blue light scanning to scan the impeller, directly establishes a model to determine the damage position of the impeller, and the blue light scanning head is carried by the absolute arm to enter the turbine for detection. After the absolute arm enters, the blue light scanning head needs to scan a full circle around the impeller, which has high space requirements. The hole position on the turbine is difficult to meet the space conditions. It is usually necessary to remove the turbine casing for scanning, which makes the detection more troublesome.

[0004] To this end, we propose a highly reliable turbine detection device and method to solve the above problems. Summary of the invention

[0005] The object of the present invention is to provide a water turbine detection device and method with high reliability to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a highly reliable water turbine detection device, comprising a main shaft detection mechanism and a runner detection mechanism, the main shaft detection mechanism comprising a dual-shaft mounting assembly and a main shaft connection assembly, the main shaft connection assembly comprising a casing, one side of the casing is fixedly connected to a transverse cylinder, the inner side of the end of the transverse cylinder is movably sleeved with a turntable, the turntable is fixedly connected to a fork head at one end away from the transverse cylinder, a shaft column is horizontally rotatably sleeved on the casing, the end of the shaft column is located in the transverse cylinder, a coupling is fixedly connected between the end of the shaft column and the turntable, an annular groove is provided on the circumference of the turntable, a plurality of pressure sensors are evenly fixedly connected to the inner side wall of the transverse cylinder, each end of the pressure sensor is rollingly connected to a ball, the ball rolling contacts the annular groove, an encoder is fixedly connected to the side of the casing away from the transverse cylinder, and the encoder shaft end is fixedly connected to the end of the shaft column;

[0007] The rotating wheel detection mechanism includes a sliding assembly, a lifting assembly is arranged on the sliding assembly, a scanning assembly is arranged on the top of the lifting assembly, and the scanning assembly includes a middle arm and a fixed platform, the fixed platform is on the lifting assembly, two T-shaped slide grooves are arranged on both sides of the middle arm, each of the T-shaped slide grooves is horizontally slidably connected to a T-shaped slider, a hinge seat is fixed on the side wall of each T-shaped slider, and an L-shaped plate is rotatably connected to each hinge seat, an extension arm is fixed to one of the L-shaped plates, and a support arm is fixed to the other L-shaped plate, the free end of the support arm is fixed to a turntable, and the turntable is rotatably connected to the top surface of the fixed platform, a sliding opening is horizontally arranged at the end of the extension arm, a sliding block is horizontally slidably connected in the sliding opening, a turning opening is arranged at the end of the sliding block, a turning opening is rotatably connected to a turning block, and a blue light scanning head is fixed to the end of the turning block.

[0008] Preferably, an inner groove is opened inside the casing, the shaft column is located in the inner groove and fixedly connected to the rotating frame, the peripheral side of the rotating frame is fixedly connected to the gear ring, the side wall of the casing is fixedly connected to the reducer and the driving motor, the rotating shaft end of the driving motor is fixedly connected to the reducer input shaft, the end of the reducer output shaft is located in the inner groove and fixedly connected to the driving gear, and the driving gear is meshed and connected to the gear ring.

[0009] Preferably, the middle arm is rotatably connected to two second synchronous pulleys at both ends of the T-shaped slide groove, a fourth synchronous belt is sleeved on the two second synchronous pulleys, the fourth synchronous belt is fixedly connected to the T-shaped slider, two sixth servo reduction motors are fixedly embedded on the surfaces at both ends of the middle arm, the shaft end of the sixth servo reduction motor is fixedly connected to the shaft of one of the second synchronous pulleys, the side wall of the hinge seat is fixedly connected to the seventh servo reduction motor, the shaft end of the seventh servo reduction motor is fixedly connected to the shaft of the L-shaped plate, the side wall of the sliding block is fixedly connected to the fourth servo reduction motor, and the shaft end of the fourth servo reduction motor is fixedly connected to the shaft of the rotating block.

[0010] Preferably, the side wall of the fixed platform is fixedly connected to the fifth servo reduction motor, the rotating shaft end of the fifth servo reduction motor is fixedly connected to the driving gear, the bottom of the turntable is fixedly sleeved on the driven gear, the driving gear is meshed and connected to the driven gear, two fourth sliding grooves are arranged on both sides of the sliding mouth, and a total of two fourth sliding blocks are horizontally slidably connected in the two fourth sliding grooves, and the two fourth sliding blocks are fixedly connected on both sides of the sliding block, and a fourth screw rod is rotatably connected in each of the fourth sliding grooves, and a fourth threaded sleeve is fixed on the fourth sliding block, and the fourth screw rod is threadedly sleeved on the fourth threaded sleeve, and the end of the extension arm is fixedly connected to the ninth servo reduction motor, and two second driving pulleys are fixed to the rotating shaft end of the ninth servo reduction motor, and each of the fourth screw rods is fixedly connected to a third short shaft near one end of the ninth servo reduction motor, and the second driven pulley is fixedly sleeved on the third short shaft, and the second driving pulley and the second driven pulley are sleeved with a second synchronous belt.

[0011] Preferably, the dual-axis carrying assembly includes a base, a lifting platform is arranged on the top surface of the base, two strip seats are fixedly connected on both sides of the top surface of the lifting platform, a first sliding groove is provided on the top surface of each strip seat, a first slider is horizontally slidably connected in the first sliding groove, the first slider is fixed to the bottom surface of the casing, two columns are vertically fixed on both sides of the base, two sliding sleeves are fixed at both ends of the lifting platform, and the sliding sleeves are slidably sleeved on the columns.

[0012] Preferably, the first screw rod is rotatably connected in the first sliding groove, the first sliding block is fixedly connected to the first threaded sleeve, the first screw rod is threadedly connected to the first threaded sleeve, the two ends of the strip seats are fixedly connected to the side plate, the middle of the side plate is fixedly sleeved with the first servo reduction motor, the rotating shaft end of the first servo reduction motor is fixedly sleeved with two first driving pulleys, the end of the first screw rod is fixedly connected to the first short shaft, the first short shaft is located in the side plate and fixedly connected to the first driven pulley, the first driving pulley and the first driven pulley are sleeved with the first synchronous belt, the side wall of the column is provided with a second sliding groove, the inner wall of the sliding sleeve is fixedly connected to the second sliding block, The second slider is vertically slidably connected in the second slide groove, the second slide groove is rotatably connected to the second screw rod, the second slider is fixedly connected to the second threaded sleeve, the second screw rod is threadedly connected to the second threaded sleeve, the base is horizontally rotatably connected to the long rod, the long rod is located directly below the two columns and is fixedly sleeved with two active bevel gears, the bottom end of the second screw rod is fixedly connected to the second short shaft, the end of the second short shaft is located inside the base and fixedly connected to the driven bevel gear, the active bevel gear is meshed and connected to the driven bevel gear, one end of the base is fixedly connected to the second servo reduction motor, and the shaft end of the second servo reduction motor is fixedly connected to the end of the long rod.

[0013] Preferably, the sliding assembly includes a bottom strip plate, the top surface of the bottom strip plate is fixedly connected to a strip plate, a third slide groove is provided inside the strip plate, a third slide groove is horizontally slidably connected to a third slider, two through grooves are provided on both sides of the strip plate, the through grooves are connected to the third slide groove, two L-shaped support block ends are fixedly connected to both sides of the top surface of the third slider, the top ends of the two L-shaped support blocks are fixedly connected to a slide plate, and the lifting assembly is arranged on the slide plate.

[0014] Preferably, the end of the L-shaped support block is slidably connected in the through groove, the fifth screw rod is rotatably connected in the third sliding groove, the fifth threaded sleeve is fixedly connected to the third sliding block, the fifth screw rod is threadedly connected to the fifth threaded sleeve, the end of the strip plate is fixedly connected to the eighth servo reduction motor, and the end of the rotating shaft of the eighth servo reduction motor is fixedly connected to the end of the fifth screw rod.

[0015] Preferably, the lifting assembly includes a large square sleeve, the inner side of the large square sleeve is vertically slidably sleeved with the middle sleeve, the inner side of the middle sleeve is vertically slidably sleeved with the inner square sleeve, the bottom end of the large square sleeve is fixedly connected to the lower sealing plate, the lower sealing plate is fixedly connected to the top surface of the slide plate, the top end of the inner square sleeve is fixedly connected to the fixed platform, the bottom end of the middle sleeve is fixedly connected to the upper sealing plate, the center of the top surface of the lower sealing plate is rotatably connected to the third screw rod, the center of the upper sealing plate is fixedly connected to the third threaded sleeve, the third screw rod is threadedly connected to the third threaded sleeve, the third screw rod is threadedly connected to the third threaded sleeve, the bottom of the lower sealing plate The surface is fixedly connected to the third servo reduction motor, and the shaft end of the third servo reduction motor is fixedly connected to the end of the third screw rod. Two strip-shaped openings are opened on the two side walls of the middle square sleeve, and multiple synchronous gears are evenly rotated in each strip-shaped opening. Two outer racks are fixedly connected to the two side walls of the large square sleeve, and two inner racks are fixedly connected to the two side walls of the inner square sleeve. The two sides of the synchronous gear are respectively meshed and connected to the outer rack and the inner rack, and two first synchronous pulleys are fixedly connected to the rotating shaft of each synchronous gear, and the third synchronous belt is sleeved on the first synchronous pulleys on the two adjacent synchronous gears.

[0016] The present invention also provides a detection method of a water turbine detection device with high reliability, comprising the following steps:

[0017] Step 1: Spindle offset detection: Place the spindle detection mechanism near the turbine, lift the spindle connection assembly through the dual-axis mounting assembly and move it horizontally, so that the fork on the spindle connection assembly connects to the turbine main shaft. At this time, the drive motor and the reducer are in a power-off state. Then the turbine starts, driving the turntable and the shaft column to rotate. At this time, the pressure sensors at various positions read the pressure. If the spindle is offset and swung, the pressure sensors at some positions will show a constant change in pressure. After -min of detection, the turbine stops. At this time, the pressure curve of the pressure sensor at each position is obtained, and the spindle offset and offset position can be determined by the pressure change.

[0018] Step 2: Guide vane closure detection: The turbine is stopped and the guide vanes on the runner are closed. The rotation of the shaft column is read through the encoder. If the shaft column rotates, it means that the runner guide vane closure is unqualified.

[0019] Step three: wheel scanning: The scanning component in the wheel detection mechanism is in the shape of a straight rod. After being inserted into the turbine through the turbine hole, the middle arm is rotated to be perpendicular to the insertion arm, and the sliding block is adjusted to the position. Then the blue light scanning head is facing the wheel, and then the drive motor is started, and the turbine main shaft is driven to rotate through the fork head, so that the wheel rotates slowly and continuously, and the wheel can be scanned by the blue light scanning head. During scanning, the blue light scanning head adjusts the angle to ensure complete scanning. After completion, a wheel model is formed through the software to observe whether the wheel is damaged.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] The spindle detection mechanism of the present invention reads the rotation of the shaft column through an encoder, and can determine whether the spindle has creeping phenomenon. By allowing the turbine to operate normally, the turntable is driven to rotate. If the spindle deviates and shakes, it will cause pressure fluctuations in the pressure sensors at various positions. According to the range of pressure fluctuations, it can be determined whether the spindle jitter is within the normal range to confirm whether the spindle deviates, and the detection of the spindle is more comprehensive and more reliable. The scanning assembly in the present invention is composed of a middle arm, an extension arm, and a support arm. The middle arm, the extension arm, and the support arm can be straight. This shape can better enter the interior of the turbine from a smaller hole position, and has low requirements for the hole position. After entering, the middle arm can be rotated to a vertical state with the support arm, so that the blue light scanning head can perform dual-axis position adjustment and can adjust the angle to facilitate alignment with the runner, and cooperate with the spindle connection assembly to drive the runner to rotate for scanning. In this way, the blue light scanning head does not need to rotate around the runner by itself, and does not need a large activity space. In this way, there is no need to remove the turbine casing for detection, which is more convenient and quick. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the main structure of the first, second and third embodiments of the present invention;

[0023] Figure 2 It is a schematic diagram of the cross-section structure of the main shaft connection assembly in the first, second and third embodiments of the present invention;

[0024] Figure 3 It is a schematic diagram of the cross-section structure of the first, second and third embodiments of the present invention;

[0025] Figure 4 It is a schematic diagram of the structure of the scanning assembly in the first, second and third embodiments of the present invention;

[0026] Figure 5It is a schematic diagram of the cross-section structure of the middle arm in the second and third embodiments of the present invention;

[0027] Figure 6 It is a schematic diagram of the cross-section structure of the extension arm in the second and third embodiments of the present invention;

[0028] Figure 7 It is a schematic diagram of the cross-section structure of the dual-axis mounting assembly in the second and third embodiments of the present invention;

[0029] Figure 8 It is a schematic diagram of the cross-section structure of the sliding assembly in the second and third embodiments of the present invention;

[0030] Fig. 9 It is a schematic diagram of the cross-section structure of the lifting assembly in the second and third embodiments of the present invention;

[0031] Fig.10 For the present invention Fig. 9 Schematic diagram of the enlarged structure at point A in the middle.

[0032] In the figure: 1. spindle detection mechanism; 2. wheel detection mechanism; 3. double-axis mounting assembly; 4. spindle connection assembly; 5. sliding assembly; 6. lifting assembly; 7. scanning assembly; 31. base; 32. lifting platform; 33. bar seat; 34. first slide groove; 35. first slider; 36. column; 37. sleeve; 38. first screw rod; 39. first threaded sleeve; 310. side plate; 311. first servo reduction motor; 312. first driving pulley; 313. first short shaft; 314. first driven pulley; 315. first synchronous belt; 316. second slide groove; 317. second slider; 318. second screw rod; 319 , second threaded sleeve; 320, long rod; 321, active bevel gear; 322, second short shaft; 323, driven bevel gear; 324, second servo reduction motor; 41, housing; 42, cross cylinder; 44, turntable; 45, fork; 46, shaft column; 47, encoder; 48, pressure sensor; 49, ball; 410, ring groove; 411, coupling; 412, inner groove; 413, rotating frame; 414, gear ring; 415, driving gear; 416, speed reducer; 417, driving motor; 51, bottom strip; 52, strip plate; 53, third slide groove; 54, third slider; 55, through groove; 56, L-shaped support block; 57, Slide plate; 58, fifth screw rod; 59, fifth threaded sleeve; 510, eighth servo reduction motor; 61, large square sleeve; 62, middle square sleeve; 63, inner square sleeve; 64, strip mouth; 65, synchronous gear; 66, first synchronous pulley; 67, third synchronous belt; 68, outer rack; 69, inner rack; 610, lower sealing plate; 611, upper sealing plate; 612, third screw rod; 613, third threaded sleeve; 614, third servo reduction motor; 71, middle arm; 72, fixed table; 73, T-type slide; 74, T-type slide block; 75, hinge seat; 76, L-type plate; 77, extension arm; 78, support arm; 79, turntable; 710, Slide; 711, sliding block; 712, rotating mouth; 713, rotating block; 714, blue light scanning head; 715, fourth servo reduction motor; 716, fifth servo reduction motor; 717, driving gear; 718, driven gear; 719, second synchronous pulley; 720, fourth synchronous belt; 721, sixth servo reduction motor; 722, seventh servo reduction motor; 723, fourth slide; 724, fourth slider; 725, fourth screw rod; 726, fourth threaded sleeve; 727, ninth servo reduction motor; 728, second driving pulley; 729, third short shaft; 730, second driven pulley; 731, second synchronous belt. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] Embodiment 1:

[0035] See also Figure 1-4 The present invention provides a technical solution: a highly reliable water turbine detection device, comprising a main shaft detection mechanism 1 and a runner detection mechanism 2, wherein the main shaft detection mechanism 1 comprises a dual-shaft mounting assembly 3 and a main shaft connection assembly 4, wherein the main shaft connection assembly 4 comprises a housing 41, wherein one side of the housing 41 is fixedly connected to a transverse cylinder 42, wherein the inner side of the end of the transverse cylinder 42 is movably sleeved with a turntable 44, wherein the end of the turntable 44 away from the transverse cylinder 42 is fixedly connected to a fork head 45, wherein a shaft column 46 is horizontally rotatably sleeved on the housing 41, wherein the end of the shaft column 46 is located in the transverse cylinder 42, wherein a coupling 411 is fixedly connected between the end of the shaft column 46 and the turntable 44, wherein an annular groove 410 is provided on the circumference of the turntable 44, wherein a plurality of pressure sensors 48 are evenly fixedly connected to the inner side wall of the transverse cylinder 42, A ball 49 is rollingly connected to the end of each pressure sensor 48, and the ball 49 rolls and contacts the annular groove 410. An encoder 47 is fixedly connected to the side of the housing 41 away from the horizontal cylinder 42, and the rotating shaft end of the encoder 47 is fixedly connected to the end of the shaft column 46. By reading the rotation of the shaft column 46 by the encoder 47, it can be determined whether the main shaft has creeping phenomenon. By driving the turntable 44 to rotate when the turbine is running normally, if the main shaft deviates and shakes, it will cause pressure fluctuations in the pressure sensors 48 at various positions. According to the range of pressure fluctuations, it can be determined whether the main shaft jitter is within the normal range to confirm whether the main shaft deviates, and the detection of the main shaft is more comprehensive and more reliable.

[0036] The rotating wheel detection mechanism 2 includes a sliding assembly 5, a lifting assembly 6 is arranged on the sliding assembly 5, a scanning assembly 7 is arranged on the top of the lifting assembly 6, and the scanning assembly 7 includes a middle arm 71 and a fixed platform 72. The fixed platform 72 is on the lifting assembly 6, and two T-shaped slide grooves 73 are arranged on both sides of the middle arm 71. A T-shaped slider 74 is horizontally slidably connected to each T-shaped slide groove 73, and a hinge seat 75 is fixed to the side wall of each T-shaped slider 74. An L-shaped plate 76 is rotatably connected to each hinge seat 75, one of the L-shaped plates 76 is fixed to an extension arm 77, and the other L-shaped plate 76 is fixed to a support arm 78. The free end of the support arm 78 is fixed to a turntable 79, and the turntable 79 is rotatably connected to the top surface of the fixed platform 72. A sliding opening 710 is horizontally arranged at the end of the extension arm 77, and a sliding block 711 is horizontally slidably connected in the sliding opening 710. A turning opening 712 is provided at the end of the sliding block 711, and a turning block 713 is rotatably connected in the turning opening 712. A blue light scanning head 714 is fixedly connected to the end of the turning block 713. The scanning assembly 7 is composed of a middle arm 71, an extension arm 77, and a support arm 78. The middle arm 71, the extension arm 77, and the support arm 78 can be in a straight shape. This shape can better enter the interior of the turbine from a smaller hole position, and has low requirements for the hole position. After entering, the middle arm 71 can be rotated to a vertical state with the support arm 78, so that the blue light scanning head 714 can perform dual-axis position adjustment and can adjust the angle to facilitate alignment with the impeller, and cooperate with the main shaft connection assembly 4 to drive the impeller to rotate for scanning. In this way, the blue light scanning head 714 does not need to rotate around the impeller by itself, and does not require a large space for movement. In this way, there is no need to remove the turbine casing for detection, which is more convenient and quick.

[0037] Embodiment 2:

[0038] See also Figure 1-10 , which is the second embodiment of the present invention. This embodiment is based on the previous embodiment. An inner groove 412 is provided inside the casing 41. The shaft column 46 is located at the position of the inner groove 412 and fixedly connected to the rotating frame 413. The peripheral side of the rotating frame 413 is fixedly connected to the gear ring 414. The side wall of the casing 41 is fixedly connected to the reducer 416 and the driving motor 417. The rotating shaft end of the driving motor 417 is fixedly connected to the input shaft of the reducer 416. The output shaft end of the reducer 416 is located in the inner groove 412 and fixedly connected to the driving gear 415. The driving gear 415 is meshed with the gear ring 414. The driving gear 415 is used to drive the shaft column 46 to rotate, thereby driving the turbine impeller to rotate slowly, so that the scanning component 7 can scan the impeller.

[0039] The interior of the middle arm 71 is located at both ends of the T-shaped slide groove 73 and is rotatably connected to two second synchronous pulleys 719. The two second synchronous pulleys 719 are sleeved with a fourth synchronous belt 720, and the fourth synchronous belt 720 is fixedly connected to the T-shaped slider 74. Two sixth servo reduction motors 721 are fixedly embedded on the surfaces of both ends of the middle arm 71. The shaft end of the sixth servo reduction motor 721 is fixedly connected to the shaft of one of the second synchronous pulleys 719. The side wall of the hinge seat 75 is fixedly connected to the seventh servo reduction motor 722, and the shaft end of the seventh servo reduction motor 722 is fixedly connected to the shaft of the L-shaped plate 76. The side wall of the sliding block 711 is fixedly connected to the fourth servo reduction motor 715, and the shaft end of the fourth servo reduction motor 715 is fixedly connected to the shaft of the rotating block 713, so as to realize the sliding action of the T-shaped slider 74.

[0040] The side wall of the fixed platform 72 is fixedly connected to the fifth servo reduction motor 716, the rotating shaft end of the fifth servo reduction motor 716 is fixedly connected to the driving gear 717, the bottom of the turntable 79 is fixedly sleeved with the driven gear 718, the driving gear 717 is meshed and connected to the driven gear 718, two fourth slide grooves 723 are provided on both sides of the sliding opening 710, and two fourth sliders 724 are horizontally slidably connected in the two fourth slide grooves 723, and the two fourth sliders 724 are fixedly connected to both sides of the sliding block 711, and a fourth screw rod 725 is rotatably connected in each fourth slide groove 723, and a fourth slider 724 is fixedly connected to the fourth slider The fourth threaded sleeve 726, the fourth screw rod 725 is threadedly sleeved on the fourth threaded sleeve 726, and the end of the extension arm 77 is fixedly connected to the ninth servo reduction motor 727, and the rotating shaft end of the ninth servo reduction motor 727 is fixedly connected to two second driving pulleys 728, and each fourth screw rod 725 is fixedly connected to a third short shaft 729 at one end close to the ninth servo reduction motor 727, and the second driven pulley 730 is fixedly sleeved on the third short shaft 729, and the second driving pulley 728 and the second driven pulley 730 are sleeved on the second synchronous belt 731, which is used to drive the movement of the sliding block 711.

[0041] The dual-axis carrying component 3 includes a base 31, a lifting platform 32 is arranged on the top surface of the base 31, two strip seats 33 are fixedly connected on both sides of the top surface of the lifting platform 32, a first slide groove 34 is provided on the top surface of each strip seat 33, a first slider 35 is horizontally slidably connected in the first slide groove 34, the first slider 35 is fixedly connected to the bottom surface of the casing 41, two columns 36 are vertically fixedly connected on both sides of the base 31, two sliding sleeves 37 are fixedly connected at both ends of the lifting platform 32, and the sliding sleeves 37 are slidably sleeved on the columns 36. The dual-axis carrying component 3 is used to carry the main shaft connecting component 4 for dual-axis movement, so as to facilitate connection with the main shaft of the turbine.

[0042] The first screw rod 38 is rotatably connected in the first sliding groove 34, the first sliding block 35 is fixedly connected to the first threaded sleeve 39, the first screw rod 38 is threadedly connected to the first threaded sleeve 39, the ends of the two strip seats 33 are fixedly connected to the side plate 310, the middle part of the side plate 310 is fixedly sleeved with the first servo reduction motor 311, the rotating shaft end of the first servo reduction motor 311 is fixedly sleeved with two first driving pulleys 312, the end of the first screw rod 38 is fixedly connected to the first short shaft 313, the first short shaft 313 is located in the side plate 310 and fixedly connected to the first driven pulley 314, the first driving pulley 312 and the first driven pulley 314 are sleeved with the first synchronous belt 315, the side wall of the column 36 is provided with a second sliding groove 316, the inner wall of the sliding sleeve 37 is fixedly connected to the second sliding block 317, and the second sliding block 317 is vertically slidably connected to the second The second guide rod 318 is rotatably connected to the second guide rod 316, the second slider 317 is fixedly connected to the second threaded sleeve 319, the second guide rod 318 is threadedly connected to the second threaded sleeve 319, the base 31 is horizontally rotatably connected to the long rod 320, the long rod 320 is located directly below the two columns 36 and is fixedly sleeved with two active bevel gears 321, the bottom end of the second guide rod 318 is fixedly connected to the second short shaft 322, the end of the second short shaft 322 is located inside the base 31 and fixedly connected to the driven bevel gear 323, the active bevel gear 321 is meshedly connected to the driven bevel gear 323, one end of the base 31 is fixedly connected to the second servo reduction motor 324, the shaft end of the second servo reduction motor 324 is fixedly connected to the end of the long rod 320, so as to realize the dual-axis movement of the dual-axis mounting component 3.

[0043] The sliding assembly 5 includes a bottom strip plate 51, the top surface of the bottom strip plate 51 is fixedly connected to a strip plate 52, a third slide groove 53 is provided inside the strip plate 52, the third slide groove 53 is horizontally slidably connected to a third slider 54, two through grooves 55 are provided on both sides of the strip plate 52, the through grooves 55 are connected to the third slide groove 53, two ends of two L-shaped support blocks 56 are fixedly connected to the top of the third slider 54, and a slide plate 57 is fixedly connected to the top of the two L-shaped support blocks 56. The lifting assembly 6 is arranged on the slide plate 57. The sliding assembly 5 is used to horizontally move the scanning assembly 7 to facilitate the scanning assembly 7 to enter the interior of the turbine.

[0044] The end of the L-shaped support block 56 is slidably connected in the through groove 55, and is rotatably connected to the fifth screw rod 58 in the third sliding groove 53. The third sliding block 54 is fixedly connected to the fifth threaded sleeve 59, and the fifth screw rod 58 is threadedly connected to the fifth threaded sleeve 59. The end of the strip plate 52 is fixedly connected to the eighth servo reduction motor 510, and the end of the rotating shaft of the eighth servo reduction motor 510 is fixedly connected to the end of the fifth screw rod 58.

[0045] The lifting assembly 6 includes a large square sleeve 61, the inner side of the large square sleeve 61 is vertically slidably sleeved with the middle sleeve 62, the inner side of the middle sleeve 62 is vertically slidably sleeved with the inner square sleeve 63, the bottom end of the large square sleeve 61 is fixedly connected to the lower sealing plate 610, the lower sealing plate 610 is fixedly connected to the top surface of the slide plate 57, the top end of the inner square sleeve 63 is fixedly connected to the fixed platform 72, the bottom end of the middle square sleeve 62 is fixedly connected to the upper sealing plate 611, the center of the top surface of the lower sealing plate 610 is rotatably connected to the third screw rod 612, the center of the upper sealing plate 611 is fixedly connected to the third threaded sleeve 613, the third screw rod 612 is threadedly connected to the third threaded sleeve 613, the third screw rod 612 is threadedly connected to the third threaded sleeve 613, and the bottom surface of the lower sealing plate 610 is fixedly connected to the third servo reduction motor 6 14. The rotating shaft end of the third servo reduction motor 614 is fixedly connected to the end of the third screw rod 612. Two strip-shaped openings 64 are provided on the two side walls of the middle square sleeve 62. Multiple synchronous gears 65 are evenly rotated and connected in each strip-shaped opening 64. Two outer racks 68 are fixedly connected to the inner side walls of the large square sleeve 61. Two inner racks 69 are fixedly connected to the two side walls of the inner square sleeve 63. The outer racks 68 and the inner racks 69 are respectively meshed and connected on both sides of the synchronous gear 65. Two first synchronous pulleys 66 are fixedly connected to the rotating shaft of each synchronous gear 65. The first synchronous pulleys 66 on the two adjacent synchronous gears 65 are sleeved with the third synchronous belt 67. The lifting assembly 6 is used to lift the scanning assembly 7 to facilitate alignment with the entry hole on the turbine.

[0046] Embodiment 3:

[0047] See also Figure 1-10 , which is the third embodiment of the present invention. This embodiment is based on the above two embodiments and provides a detection method of a water turbine detection device with high reliability, comprising the following steps:

[0048] Step 1: Spindle offset detection: Place the spindle detection mechanism 1 near the turbine, lift the spindle connection component 4 through the dual-axis mounting component 3 and move it horizontally, so that the fork 45 on the spindle connection component 4 is connected to the turbine main shaft. At this time, the drive motor 417 and the reducer 416 are in a power-off state. Then the turbine is started, driving the turntable 44 and the shaft column 46 to rotate. At this time, the pressure sensors 48 at various positions read the pressure. If the spindle is offset and swung, the pressure sensors 48 at some positions will show a continuous change in pressure. After 1-5 minutes of detection, the turbine is shut down. At this time, the pressure curve of the pressure sensor 48 at each position is obtained, and the spindle offset and offset position can be determined by the pressure change;

[0049] Step 2: Guide vane closure detection: The turbine is stopped and the guide vanes on the runner are closed. The rotation of the shaft column 46 is read through the encoder 47. If the shaft column 46 rotates, it means that the runner guide vane closure is unqualified.

[0050] Step three: wheel scanning: the scanning component 7 in the wheel detection mechanism 2 is in the shape of a straight rod. After being inserted into the turbine through the turbine hole, the middle arm 71 is rotated to be perpendicular to the insertion arm 77, and the sliding block 711 is adjusted to a position. Then the blue light scanning head 714 faces the wheel, and then the driving motor 417 is started, and the turbine main shaft is driven to rotate through the fork head 45, so that the wheel rotates slowly and continuously, and the wheel can be scanned by the blue light scanning head 714. During scanning, the blue light scanning head 714 adjusts the angle to ensure complete scanning. After completion, a wheel model is formed through the software to observe whether the wheel is damaged.

[0051] Embodiment 4:

[0052] See also Figure 1-10, which is the fourth embodiment of the present invention. This embodiment is based on the above three embodiments. When performing detection, the present invention adopts the following steps to achieve it; Step 1: Spindle offset detection: Place the spindle detection mechanism 1 near the turbine, lift the spindle connection component 4 through the dual-axis mounting component 3 and move it horizontally, so that the fork 45 on the spindle connection component 4 is connected to the turbine main shaft. At this time, the drive motor 417 and the reducer 416 are in a power-off state. Then the turbine is started, driving the turntable 44 and the shaft column 46 to rotate. At this time, the pressure sensors 48 at various positions read the pressure. If the spindle is offset and swung, the pressure sensors 48 at some positions will show a continuous change in pressure. After 1-5 minutes of detection, the turbine stops. The turbine is stopped, and the guide vanes on the runner are closed. The rotation of the shaft column 46 is read through the encoder 47. If the shaft column 46 rotates, it means that the guide vane closure of the runner is unqualified. Step 3: Runner scanning: The scanning component 7 in the runner detection mechanism 2 is in the shape of a straight rod. After being inserted into the turbine through the turbine hole, the middle arm 71 is rotated to be perpendicular to the insertion arm 77, and the sliding block 711 is adjusted to a position. Then, the blue light scanning head 714 faces the runner, and then the drive motor 417 is started, driving the turbine through the fork head 45. The main shaft rotates, causing the wheel to rotate slowly and continuously, and the wheel can be scanned by the blue light scanning head 714. During the scanning, the blue light scanning head 714 adjusts the angle to ensure that the scanning is complete. After the scanning is completed, a wheel model is formed by the software to observe whether the wheel is damaged. The main shaft detection mechanism 1 of the present invention reads the rotation of the shaft column 46 through the encoder 47, and can determine whether the main shaft has creeping phenomenon. When the turbine is running normally, the turntable 44 is driven to rotate. If the main shaft deviates and shakes, it will cause pressure fluctuations in the pressure sensors 48 at various positions. According to the range of the pressure fluctuation, it can be determined whether the main shaft jitter is within the normal range to confirm whether the main shaft deviates, which is more accurate for the detection of the main shaft. More comprehensive and more reliable; the scanning component 7 in the present invention is composed of a middle arm 71, an extension arm 77, and a support arm 78. The middle arm 71, the extension arm 77, and the support arm 78 can be in a straight shape. This shape can better enter the interior of the turbine from a smaller hole position, and has low requirements for the entry hole position. After entering, the middle arm 71 can be rotated to a vertical state with the support arm 78, so that the blue light scanning head 714 can perform dual-axis position adjustment and can adjust the angle to facilitate alignment with the impeller, and cooperate with the main shaft connecting component 4 to drive the impeller to rotate for scanning. In this way, the blue light scanning head 714 does not need to rotate around the impeller by itself, and does not need a large space for movement. In this way, there is no need to remove the turbine casing for detection, which is more convenient and quick.

[0053] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A highly reliable water turbine detection device, comprising a main shaft detection mechanism (1) and a runner detection mechanism (2), characterized in that: The spindle detection mechanism (1) comprises a dual-axis mounting assembly (3) and a spindle connection assembly (4), wherein the spindle connection assembly (4) comprises a housing (41), one side of the housing (41) is fixedly connected to a transverse cylinder (42), the inner side of the end of the transverse cylinder (42) is movably connected to a rotating disk (44), the end of the rotating disk (44) away from the transverse cylinder (42) is fixedly connected to a fork head (45), the housing (41) is horizontally rotatably connected to a shaft column (46), the end of the shaft column (46) is located in the transverse cylinder (42), and the shaft column (4 6) A coupling (411) is fixedly connected between the end and the rotating disk (44), an annular groove (410) is provided on the circumference of the rotating disk (44), a plurality of pressure sensors (48) are evenly fixedly connected to the inner wall of the transverse cylinder (42), each end of the pressure sensor (48) is rollingly connected to a ball (49), the ball (49) rollingly contacts the annular groove (410), an encoder (47) is fixedly connected to the side of the housing (41) away from the transverse cylinder (42), and the rotating shaft end of the encoder (47) is fixedly connected to the end of the shaft column (46); The rotating wheel detection mechanism (2) comprises a sliding assembly (5), a lifting assembly (6) is arranged on the sliding assembly (5), a scanning assembly (7) is arranged on the top of the lifting assembly (6), the scanning assembly (7) comprises a middle arm (71) and a fixed platform (72), the fixed platform (72) is arranged on the lifting assembly (6), two T-shaped sliding grooves (73) are arranged on both sides of the middle arm (71), each of the T-shaped sliding grooves (73) is horizontally slidably connected to a T-shaped sliding block (74), a hinge seat (75) is fixedly connected to the side wall of each T-shaped sliding block (74), and each of the hinge seats (75) is rotatably connected to an L-shaped plate (76), an extension arm (77) is fixedly connected to one L-shaped plate (76), and a support arm (78) is fixedly connected to the other L-shaped plate (76), the free end of the support arm (78) is fixedly connected to a turntable (79), and the turntable (79) is rotatably connected to the top surface of the fixed platform (72), a sliding opening (710) is horizontally opened at the end of the extension arm (77), and a sliding block (711) is horizontally slidably connected in the sliding opening (710), and a rotating opening (712) is opened at the end of the sliding block (711), and a rotating block (713) is rotatably connected in the rotating opening (712), and the end of the rotating block (713) is fixedly connected to a blue light scanning head (714).

2. A water turbine detection device with high reliability according to claim 1, characterized in that: An inner groove (412) is provided inside the housing (41); the shaft column (46) is located in the inner groove (412) and fixedly connected to a rotating frame (413); the rotating frame (413) is fixedly connected to a gear ring (414) on its circumferential side; a reducer (416) and a driving motor (417) are fixedly connected to a side wall of the housing (41); a rotating shaft end of the driving motor (417) is fixedly connected to an input shaft of the reducer (416); an output shaft end of the reducer (416) is located in the inner groove (412) and fixedly connected to a driving gear (415); and the driving gear (415) is meshedly connected to the gear ring (414).

3. A water turbine detection device with high reliability according to claim 1, characterized in that: The middle arm (71) is internally located at the two ends of the T-shaped slide groove (73) and is rotatably connected to two second synchronous pulleys (719); the two second synchronous pulleys (719) are sleeved with a fourth synchronous belt (720); the fourth synchronous belt (720) is fixedly connected to the T-shaped slider (74); two sixth servo reduction motors (721) are fixedly connected to the surfaces at both ends of the middle arm (71); the rotating shaft end of the sixth servo reduction motor (721) is fixedly connected to the rotating shaft of one of the second synchronous pulleys (719); the side wall of the hinge seat (75) is fixedly connected to the seventh servo reduction motor (722); the rotating shaft end of the seventh servo reduction motor (722) is fixedly connected to the rotating shaft of the L-shaped plate (76); the side wall of the sliding block (711) is fixedly connected to the fourth servo reduction motor (715); the rotating shaft end of the fourth servo reduction motor (715) is fixedly connected to the rotating shaft of the rotating block (713).

4. A water turbine detection device with high reliability according to claim 1, characterized in that: The side wall of the fixed platform (72) is fixedly connected to the fifth servo reduction motor (716), the rotating shaft end of the fifth servo reduction motor (716) is fixedly connected to the driving gear (717), the bottom of the rotating platform (79) is fixedly sleeved with the driven gear (718), the driving gear (717) is meshedly connected to the driven gear (718), two fourth sliding grooves (723) are provided on both sides of the sliding mouth (710), and two fourth sliding blocks (724) are horizontally slidably connected in the two fourth sliding grooves (723), and the two fourth sliding blocks (724) are fixedly connected on both sides of the sliding block (711), and a fourth screw rod (725) is rotatably connected in each of the fourth sliding grooves (723). The fourth slider (724) is fixedly connected to the fourth threaded sleeve (726), the fourth screw rod (725) is threadedly sleeved on the fourth threaded sleeve (726), the end of the extension arm (77) is internally fixedly connected to the ninth servo reduction motor (727), the shaft end of the ninth servo reduction motor (727) is fixedly connected to two second driving pulleys (728), each of the fourth screw rods (725) is fixedly connected to a third short shaft (729) at one end close to the ninth servo reduction motor (727), the third short shaft (729) is fixedly sleeved on the second driven pulley (730), and the second driving pulley (728) and the second driven pulley (730) are sleeved on the second synchronous belt (731).

5. A water turbine detection device with high reliability according to claim 1, characterized in that: The dual-axis mounting assembly (3) comprises a base (31), a lifting platform (32) is arranged on the top surface of the base (31), two strip seats (33) are fixedly connected on both sides of the top surface of the lifting platform (32), a first sliding groove (34) is provided on the top surface of each strip seat (33), a first sliding block (35) is horizontally slidably connected in the first sliding groove (34), the first sliding block (35) is fixedly connected to the bottom surface of the casing (41), two columns (36) are vertically fixedly connected on both sides of the base (31), two sliding sleeves (37) are fixedly connected at both ends of the lifting platform (32), and the sliding sleeves (37) are slidably sleeved on the columns (36).

6. A water turbine detection device with high reliability according to claim 5, characterized in that: The first sliding groove (34) is rotatably connected to the first screw rod (38), the first sliding block (35) is fixedly connected to the first threaded sleeve (39), the first screw rod (38) is threadedly connected to the first threaded sleeve (39), the ends of the two strip seats (33) are fixedly connected to the side plates (310), the middle of the side plates (310) is fixedly sleeved with the first servo reduction motor (311), and the rotating shaft end of the first servo reduction motor (311) is fixedly sleeved with two first driving pulleys (312), the end of the first screw rod (38) is fixedly connected to the first short shaft (313), the first short shaft (313) is located in the side plate (310) and is fixedly connected to the first driven pulley (314), the first driving pulley (312) and the first driven pulley (314) are sleeved with a first synchronous belt (315), the side wall of the column (36) is provided with a second sliding groove (316), the inner wall of the sliding sleeve (37) is fixedly connected to the second slider (317), and the second slider The second slider (317) is vertically slidably connected in the second slide groove (316), and the second slide groove (316) is rotatably connected to the second screw rod (318). The second slider (317) is fixedly connected to the second threaded sleeve (319), and the second screw rod (318) is threadedly connected to the second threaded sleeve (319). The base (31) is horizontally rotatably connected to the long rod (320). The long rod (320) is located directly below the two columns (36) and is fixedly sleeved with two active bevel gears (321). The bottom end of the second screw rod (318) is fixedly connected to the second short shaft (322), and the end of the second short shaft (322) is located in the base (31) and fixedly connected to the driven bevel gear (323). The active bevel gear (321) is meshedly connected to the driven bevel gear (323). One end of the base (31) is fixedly connected to the second servo reduction motor (324), and the shaft end of the second servo reduction motor (324) is fixedly connected to the end of the long rod (320).

7. A water turbine detection device with high reliability according to claim 1, characterized in that: The sliding assembly (5) comprises a bottom strip plate (51), the top surface of the bottom strip plate (51) is fixedly connected to a strip plate (52), a third slide groove (53) is provided inside the strip plate (52), a third sliding block (54) is horizontally slidably connected inside the third slide groove (53), two through grooves (55) are provided on both sides of the strip plate (52), the through grooves (55) are connected to the third slide groove (53), two ends of two L-shaped support blocks (56) are fixedly connected to the top sides of the third sliding block (54), the top ends of the two L-shaped support blocks (56) are fixedly connected to a slide plate (57), and the lifting assembly (6) is arranged on the slide plate (57).

8. A water turbine detection device with high reliability according to claim 7, characterized in that: The end of the L-shaped support block (56) is slidably connected in the through groove (55), the third sliding groove (53) is rotatably connected to the fifth screw rod (58), the third sliding block (54) is fixedly connected to the fifth threaded sleeve (59), the fifth screw rod (58) is threadedly connected to the fifth threaded sleeve (59), the end of the strip plate (52) is fixedly connected to the eighth servo reduction motor (510), and the end of the rotating shaft of the eighth servo reduction motor (510) is fixedly connected to the end of the fifth screw rod (58).

9. A water turbine detection device with high reliability according to claim 7, characterized in that: The lifting assembly (6) comprises a large square sleeve (61), the inner side of the large square sleeve (61) is vertically slidably sleeved with the middle sleeve (62), the inner side of the middle sleeve (62) is vertically slidably sleeved with the inner square sleeve (63), the bottom end of the large square sleeve (61) is fixedly connected to a lower sealing plate (610), the lower sealing plate (610) is fixedly connected to the top surface of the slide plate (57), the top end of the inner square sleeve (63) is fixedly connected to a fixed platform (72), the bottom end of the middle square sleeve (62) is fixedly connected to an upper sealing plate (611), the center of the top surface of the lower sealing plate (610) is rotatably connected to a third screw rod (612), the center of the upper sealing plate (611) is fixedly connected to a third threaded sleeve (613), the third screw rod (612) is threadedly connected to the third threaded sleeve (613), the third screw rod (612) is threadedly connected to the third threaded sleeve (613), the third screw rod (612) is threadedly connected to the third threaded sleeve (613), the The bottom surface of the lower sealing plate (610) is fixedly connected to the third servo reduction motor (614), and the rotating shaft end of the third servo reduction motor (614) is fixedly connected to the end of the third screw rod (612). Two strip-shaped openings (64) are provided on the two side walls of the middle square sleeve (62), and a plurality of synchronous gears (65) are evenly rotated and connected in each of the strip-shaped openings (64). Two outer racks (68) are fixedly connected to the inner side walls of the large square sleeve (61), and two inner racks (69) are fixedly connected to the two side walls of the inner square sleeve (63). The outer racks (68) and the inner racks (69) are meshedly connected on both sides of the synchronous gear (65). Two first synchronous pulleys (66) are fixedly connected to the rotating shaft of each synchronous gear (65), and the third synchronous belt (67) is sleeved on the first synchronous pulleys (66) on the two adjacent synchronous gears (65).

10. A detection method using the highly reliable water turbine detection device according to any one of claims 1 to 9, characterized in that: The following steps are involved: Step 1: Spindle offset detection: Place the spindle detection mechanism (1) near the turbine, lift the spindle connection component (4) through the dual-axis mounting component (3) and move it horizontally, so that the fork (45) on the spindle connection component (4) is connected to the turbine main shaft. At this time, the drive motor (417) and the reducer (416) are in a power-off state. Then the turbine is started, driving the turntable (44) and the shaft column (46) to rotate. At this time, the pressure sensors (48) at various positions read the pressure. If the spindle has an offset and swing phenomenon, the pressure sensors (48) at some positions will have a continuous change in pressure. After 1-5 minutes of detection, the turbine is shut down. At this time, the pressure curve of the pressure sensor (48) at each position is obtained, and the spindle offset and offset position can be determined by the pressure change; Step 2: Guide vane closure detection: the turbine is stopped, and the guide vanes on the runner are closed. The rotation of the shaft column (46) is read through the encoder (47). If the shaft column (46) rotates, it means that the runner guide vane closure is unqualified. Step 3: Scanning the runner: The scanning assembly (7) in the runner detection mechanism (2) is in the shape of a straight rod. After being inserted into the turbine through the turbine hole, the middle arm (71) is rotated to be perpendicular to the insertion arm (77), and the sliding block (711) is adjusted to a proper position. Then, the blue light scanning head (714) faces the runner. Then, the driving motor (417) is started, and the main shaft of the turbine is driven to rotate through the fork head (45), so that the runner rotates slowly and continuously. The runner can be scanned by the blue light scanning head (714). During the scanning, the blue light scanning head (714) adjusts the angle to ensure that the scanning is complete. After completion, a runner model is formed through the software to observe whether the runner is damaged.

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