A centrifugal pump impeller detection device

Abstract

The present invention discloses a centrifugal pump impeller detection device, including a base, an adjustment cylinder, a clamping adjustment mechanism, a central axis, a flow detection mechanism and a sealing cover, wherein the adjustment cylinder is rotatably arranged on the top of the base, the clamping adjustment mechanism is arranged on the inner side of the adjustment cylinder, the central axis is arranged on the inner side of the clamping adjustment mechanism, the flow detection mechanism is arranged in a circular array on the side wall of the base, and the sealing cover is arranged above the adjustment cylinder. The present invention belongs to the technical field of water pump production, and specifically refers to a centrifugal pump impeller detection device; compared with traditional impeller detection devices, the present invention can detect the dynamic balance of the impeller at a lower cost, reduce production costs, and can detect the distribution of blades at the same time.

Description

Technical Field

[0001] The invention belongs to the technical field of water pump production, and in particular relates to a centrifugal pump impeller detection device. Background Art

[0002] The principle of a centrifugal pump is to use centrifugal force to drive water to rotate through a high-speed rotating impeller, and then throw the water out to achieve the purpose of transportation. After the impeller is produced, it is necessary to perform a dynamic balance test on the impeller. An impeller with uneven mass distribution will seriously affect the service life of the centrifugal pump. Some existing impeller dynamic balance detection devices use special equipment to detect the lateral G value generated by the impeller during rotation to detect the dynamic balance of the impeller. This type of equipment is usually complex in structure and expensive, which is not conducive to controlling production costs.

[0003] At the same time, the blades inside the impeller are usually fixed by welding. During the production process, the blades may be unevenly distributed, resulting in uneven water output from each water outlet of the impeller. If the blades are unevenly distributed, the flow and pressure output of the pump will be unstable, the energy loss will increase, and the normal operation of the pump will be affected. The existing detection method usually determines whether the impeller is normal by testing the output pressure of the centrifugal pump, and it is impossible to effectively detect the blade distribution of the impeller before installation. Summary of the invention

[0004] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a centrifugal pump impeller detection device, which can detect the dynamic balance of the impeller at a lower cost and can also detect the distribution of blades.

[0005] The technical solution adopted by the present invention is as follows: A centrifugal pump impeller detection device provided by the present invention includes a base, an adjustment cylinder, a clamping adjustment mechanism, a central axis, a flow detection mechanism and a sealing cover, wherein the adjustment cylinder is rotatably arranged on the top of the base, the clamping adjustment mechanism is arranged on the inner side of the adjustment cylinder, the central axis is arranged on the inner side of the clamping adjustment mechanism, the flow detection mechanism is arranged in a circular array on the side wall of the base, and the sealing cover is arranged above the adjustment cylinder.

[0006] Furthermore, the base includes a base bin, an annular slide, a drive motor and a turntable, the annular slide is arranged on the top of the base bin, the drive motor is arranged in the base bin, the turntable is rotatably arranged on the top wall of the base bin, the turntable penetrates the top wall of the base bin, a buffer bin is arranged in the turntable, a magnetic suction groove is arranged on the bottom wall of the buffer bin, a through hole is opened on the top wall of the turntable, and the output end of the drive motor is transmission-connected to the turntable.

[0007] Furthermore, the adjustment cylinder includes a rotating cylinder and an extension platform, the rotating cylinder is an internally penetrating cylinder, the extension platform is arranged around the outside of the rotating cylinder, the bottom of the rotating cylinder is rotatably clamped in an annular slide groove, the rotating cylinder and the annular slide groove are sealed by a sealing ring, the linear array of the inner wall of the rotating cylinder is provided with an adjustment ring, the circumferential array of the inner wall of the adjustment ring is provided with a toothed ring segment, and the adjustment ring is deflected by a certain angle from top to bottom in sequence.

[0008] Furthermore, the central axis includes a central rod, a limit plate, a magnetic block, a slot, a bottom plate, a plug rod, a threaded sleeve, a screw and a top plate, the limit plate is arranged at the bottom of the central rod, the limit plate is arranged in the buffer bin, the radius of the limit plate is greater than the radius of the through hole and smaller than the radius of the buffer bin, the height of the limit plate is smaller than the height of the buffer bin, the magnetic block is arranged at the bottom of the limit plate, the magnetic block is arranged in the magnetic slot, the magnetic block is engaged with the magnetic slot, the slot is opened at the top of the central rod, The bottom plate is arranged above the center rod, the insertion rod is arranged on the bottom wall of the bottom plate, the insertion rod is inserted into the slot, the insertion rod is engaged with the slot, the top of the threaded sleeve is open, the threaded sleeve is arranged at the top of the bottom plate, the screw is rotatably arranged in the threaded sleeve, the threaded sleeve is engaged with the screw thread, the top plate is arranged at the top of the screw, the center rod, the limit plate, the bottom plate, the threaded sleeve, the screw and the top plate are coaxially arranged, and preferably, the top wall of the bottom plate and the bottom wall of the top plate are respectively provided with rubber pads for anti-slip.

[0009] Among them, a demonstration impeller is provided between the top plate and the bottom plate, and the outer wall of the threaded sleeve fits with the inner wall of the demonstration impeller. After the demonstration impeller is placed on the bottom plate, the top plate is rotated, and the top plate clamps the demonstration impeller downward. The threaded sleeve, bottom plate and plug rod are replaceable in design, and the size can be changed according to the specifications of the impeller.

[0010] Furthermore, the clamping adjustment mechanism includes a clamping mechanism and a connecting rod, the clamping mechanism includes a double-layer ring and a supporting mechanism, the double-layer ring is a double-layer circular ring, the circumferential array of the supporting mechanism is arranged between the double-layer rings, the supporting mechanism includes a slider, an elastic telescopic rod, a clamping roller, a buckle, a slot, a transmission gear and a rack, the slider is slidably clamped between the double-layer rings, the sliding trajectory of the slider points to the center of the double-layer ring, the elastic telescopic rod is arranged at one end of the slider close to the center of the double-layer ring, the clamping roller is rotatably arranged at one end of the elastic telescopic rod close to the center of the double-layer ring, the buckle is arranged at the bottom of the slider, the slot is arranged on the bottom wall of the double-layer ring, the buckle can be clamped in the slot, there are two slots under the slider, the connecting line between the slots is parallel to the sliding trajectory of the slider, the transmission gear is rotatably arranged on the side of the slider, the transmission gear is rotatably arranged between the double-layer rings, the transmission gear is interference fit with the double-layer ring, the rack is arranged on the side wall of the slider close to the transmission gear, and the rack is meshed with the transmission gear.

[0011] Furthermore, the clamping mechanisms are arranged in a linear array, and the connecting rods penetrate and connect the clamping mechanisms.

[0012] The number of the clamping mechanisms is the same as that of the adjusting rings, the height of the clamping mechanisms is the same as that of the adjusting rings, the transmission gear is meshed with the toothed ring segment, the number of the supporting mechanisms is the same as that of the toothed ring segments, the distance between the slots is equal to the distance that the transmission gear drives the slider to slide through the rack when the toothed ring segment completely passes through the transmission gear once when the adjusting ring is rotated. In the initial state, the clamping roller fits the side wall of the center rod and the elastic telescopic rod is slightly contracted, and the clamping roller is squeezed inwardly under the elastic force of the elastic telescopic rod, and the buckle is clamped in the slot close to the side of the center of the double-layer ring to fix the slider, and the rotating drum is rotated. After the toothed ring segment completely passes through the transmission gear, the transmission gear drives the slider to slide in the direction away from the double-layer ring through the rack, and the buckle enters the slot away from the side of the center of the double-layer ring, and the rotating drum is rotated to move the clamping roller of the clamping mechanism away from the center rod from top to bottom.

[0013] Furthermore, the flow detection mechanism includes an air outlet, a detection blade, a speed detection device, a connecting pipe, an outer panel, an air pump and a filling airbag. The air outlet is arranged on the outer wall of the base, the detection blade is rotatably arranged in the air outlet, the speed detection device is arranged at the top of the air outlet, and the speed detection device can detect the speed of the detection blade. This is the prior art and will not be elaborated here. The connecting pipe is arranged at the top of the air outlet, the connecting pipe is communicated with the air outlet, the end of the connecting pipe is the air inlet, the outer panel is arranged on the side wall of the end of the connecting pipe, the air pump is arranged on the side of the outer panel away from the end of the connecting pipe, the filling airbag is arranged on the side of the outer panel away from the air pump, the air pump is communicated with the filling airbag, and the connecting pipe passes through the outer panel and the filling airbag.

[0014] Furthermore, the sealing cover includes a sealing cylinder, an operating port, a second air pump, a telescopic air duct and an annular magnet. The sealing cylinder is a cylindrical structure with an opening at the bottom. The sealing cylinder is clamped on the top of the extension platform. The sealing cylinder and the extension platform are sealed by a sealing ring. The circular array of operating ports is arranged on the side wall of the sealing cylinder. The second air pump is arranged on the top of the sealing cylinder. The telescopic air duct is arranged below the top wall of the sealing cylinder. The annular magnet is arranged at the bottom of the telescopic air duct. A rubber ring is arranged at the bottom of the annular magnet.

[0015] The beneficial effects achieved by the present invention using the above structure are as follows: a centrifugal pump impeller detection device provided by the present scheme, after the demonstration impeller is installed on the central axis, the magnetic attraction block is aligned and inserted into the magnetic attraction groove to align the central axis, and then the sealing cover is covered, the drive motor and the air pump 2 are started, and the dynamic balancing test of the impeller begins. The drive motor drives the central axis and the demonstration impeller to rotate through the turntable, and the air pump 2 draws air outward to reduce the air inside the sealing cover and the adjustment cylinder, making it close to a vacuum state, reducing the influence of gas fluctuations during the rotation of the impeller and increasing the test accuracy. Then, the rotating cylinder is slowly rotated to make the clamping rollers of the clamping adjustment mechanism from top to bottom move away from the central rod in turn, gradually reducing the lateral support for the central rod. If the impeller mass distribution is unbalanced, the lateral G value exceeds the support strength of the remaining clamping mechanism, the magnetic attraction block will fall out of the magnetic attraction groove and the central rod will tilt; if the clamping rollers of the clamping mechanism are completely separated from the central rod, the impeller can still rely on the magnetic If the magnetic attraction and limit of the suction block and the magnetic attraction groove continue to rotate, it means that the dynamic balance test of the current impeller has passed. Compared with the existing testing equipment, the structure is simpler and the cost is lower. At the same time, before or after the dynamic balance test, the operation port can be opened, the top plate can be rotated to remove, the water inlet of the demonstration impeller can be exposed, and the telescopic air duct can be pulled down to make the annular magnet adsorb the impeller surface, so that the telescopic air duct is connected to the water inlet of the impeller, and the filling air bags are placed one by one in the gaps between the blades of the impeller, and the air pump 1 is started to expand the filling air bags and seal the water outlet of the impeller. Then the air pump 2 is controlled to blow air into the water inlet of the impeller. After the gas enters the impeller, it is diverted by the blades and blown out from the air outlet along the corresponding connecting pipe, driving the detection fan blades to rotate. It is only necessary to observe the speed displayed by the speed detection device of each air outlet to judge whether the blade distribution is uniform. If the speed difference displayed by each speed detection device is too large, it means that the blade distribution is uneven. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic structural diagram of a centrifugal pump impeller detection device provided by the present invention;

[0017] Figure 2 A schematic structural diagram of a centrifugal pump impeller detection device provided by the present invention without a sealing cover;

[0018] Figure 3 A cross-sectional view of a centrifugal pump impeller detection device provided by the present invention;

[0019] Figure 4 for Figure 3 A partial enlarged view of part A in FIG.

[0020] Figure 5 A schematic diagram of the structure of a centrifugal pump impeller detection device provided by the present invention without the adjustment cylinder and the clamping adjustment mechanism;

[0021] Figure 6 for Figure 5 A partial enlarged view of part B in FIG.

[0022] Figure 7 A schematic diagram of the structure of the regulating cylinder provided by the present invention;

[0023] Figure 8 A cross-sectional view of the central axis provided by the present invention;

[0024] Fig. 9 A side view of the adjustment cylinder and the clamping adjustment mechanism provided by the present invention;

[0025] Fig.10 for Fig. 9 A cross-sectional view of the CC portion in FIG.

[0026] Fig.11 for Fig. 9 Cross-sectional view of the DD part.

[0027] Among them, 1. base, 2. adjustment cylinder, 3. clamping adjustment mechanism, 4. central axis, 5. flow detection mechanism, 6. demonstration impeller, 7. sealing cover, 101. base bin, 102. annular slide groove, 103. drive motor, 104. turntable, 105. buffer bin, 106. through hole, 107. magnetic suction groove, 201. rotating cylinder, 202. extension table, 203. adjustment ring, 204. gear ring segment, 301. clamping mechanism, 302. connecting rod, 303. double-layer ring, 304. slider, 305. elastic telescopic rod, 306. clamping roller, 307. card Buckle, 308, slot, 309, transmission gear, 310, rack, 401, center rod, 402, limit plate, 403, magnetic block, 404, slot, 405, bottom plate, 406, plug rod, 407, threaded sleeve, 408, screw, 409, top plate, 501, air outlet, 502, detection fan blade, 503, speed detection device, 504, connecting pipe, 505, outer plate, 506, air pump one, 507, filling air bag, 701, sealing tube, 702, operation port, 703, air pump two, 704, telescopic air duct, 705, ring magnet.

[0028] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0030] In the description of the present invention, it should be understood that terms such as “upper”, “lower”, “front”, “back”, “left”, “right”, “top”, “bottom”, “inside” and “outside” indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0031] like Figure 1-Figure 11 As shown, a centrifugal pump impeller detection device provided by the present invention includes a base 1, an adjustment cylinder 2, a clamping adjustment mechanism 3, a central axis 4, a flow detection mechanism 5 and a sealing cover 7, the adjustment cylinder 2 is rotatably arranged on the top of the base 1, the clamping adjustment mechanism 3 is arranged on the inner side of the adjustment cylinder 2, the central axis 4 is arranged on the inner side of the clamping adjustment mechanism 3, the flow detection mechanism 5 is arranged in a circular array on the side wall of the base 1, and the sealing cover 7 is arranged above the adjustment cylinder 2.

[0032] The base 1 includes a base bin 101, an annular slide 102, a driving motor 103 and a turntable 104. The annular slide 102 is arranged on the top of the base bin 101, the driving motor 103 is arranged in the base bin 101, the turntable 104 is rotatably arranged on the top wall of the base bin 101, the turntable 104 penetrates the top wall of the base bin 101, a buffer bin 105 is arranged in the turntable 104, the bottom wall of the buffer bin 105 is provided with a magnetic suction groove 107, the top wall of the turntable 104 is opened with a through hole 106, and the output end of the driving motor 103 is transmission-connected to the turntable 104.

[0033] The adjusting cylinder 2 comprises a rotating cylinder 201 and an extension platform 202. The rotating cylinder 201 is a cylinder body penetrating inside, and the extension platform 202 is arranged around the outside of the rotating cylinder 201. The bottom of the rotating cylinder 201 is rotatably clamped in the annular slide groove 102. The rotating cylinder 201 and the annular slide groove 102 are sealed by a sealing ring. The linear array of the inner wall of the rotating cylinder 201 is provided with an adjusting ring 203, and the circumferential array of the inner wall of the adjusting ring 203 is provided with a toothed ring segment 204. The adjusting ring 203 is deflected by a certain angle from top to bottom.

[0034] The central axis 4 includes a central rod 401, a limit plate 402, a magnetic block 403, a slot 404, a bottom plate 405, an insert rod 406, a threaded sleeve 407, a screw 408 and a top plate 409. The limit plate 402 is arranged at the bottom of the central rod 401, and the limit plate 402 is arranged in the buffer bin 105. The radius of the limit plate 402 is greater than the radius of the through hole 106 and smaller than the radius of the buffer bin 105. The height of the limit plate 402 is smaller than the height of the buffer bin 105. The magnetic block 403 is arranged at the bottom of the limit plate 402, and the magnetic block 403 is arranged in the magnetic groove 107. The magnetic block 403 is engaged with the magnetic groove 107, and the slot 404 is opened at the top of the central rod 401. The bottom plate 405 is arranged above the center rod 401, the insertion rod 406 is arranged on the bottom wall of the bottom plate 405, the insertion rod 406 is inserted into the slot 404, the insertion rod 406 is engaged with the slot 404, the top of the threaded sleeve 407 is open, the threaded sleeve 407 is arranged at the top of the bottom plate 405, the screw 408 is rotatably arranged in the threaded sleeve 407, the threaded sleeve 407 is threadedly engaged with the screw 408, the top plate 409 is arranged at the top of the screw 408, the center rod 401, the limit plate 402, the bottom plate 405, the threaded sleeve 407, the screw 408 and the top plate 409 are coaxially arranged, and preferably, the top wall of the bottom plate 405 and the bottom wall of the top plate 409 are respectively provided with rubber pads for anti-slip.

[0035] A demonstration impeller 6 is provided between the top plate 409 and the bottom plate 405. The outer wall of the threaded sleeve 407 fits with the inner wall of the demonstration impeller 6. After the demonstration impeller 6 is placed on the bottom plate 405, the top plate 409 is rotated, and the top plate 409 clamps the demonstration impeller 6 downward. The threaded sleeve 407, the bottom plate 405 and the insert rod 406 are designed to be replaceable, and the size can be changed according to the specifications of the impeller.

[0036] The clamping adjustment mechanism 3 includes a clamping mechanism 301 and a connecting rod 302. The clamping mechanism 301 includes a double-layer ring 303 and a supporting mechanism. The double-layer ring 303 is a double-layer circular ring. The supporting mechanism is arranged in a circular array between the double-layer rings 303. The supporting mechanism includes a slider 304, an elastic telescopic rod 305, a clamping roller 306, a buckle 307, a slot 308, a transmission gear 309 and a rack 310. The slider 304 is slidably clamped between the double-layer rings 303. The sliding track of the slider 304 points to the center of the double-layer ring 303. The elastic telescopic rod 305 is arranged at one end of the slider 304 close to the center of the double-layer ring 303. The clamping roller 306 is rotatably arranged at the elastic telescopic rod 305 close to the center of the double-layer ring 303. At one end of the center, a buckle 307 is arranged at the bottom of the slider 304, and a slot 308 is arranged on the bottom wall of the double-layer ring 303. The buckle 307 can be clamped in the slot 308. There are two slots 308 under the slider 304. The connecting line between the slots 308 is parallel to the sliding track of the slider 304. A transmission gear 309 is rotatably arranged on the side of the slider 304. The transmission gear 309 is rotatably arranged between the double-layer rings 303. The transmission gear 309 and the double-layer rings 303 have an interference fit. A rack 310 is arranged on the side wall of the slider 304 close to the transmission gear 309. The rack 310 is meshed with the transmission gear 309. The clamping mechanism 301 is arranged in a linear array, and the connecting rod 302 passes through and connects the clamping mechanism 301.

[0037] The flow detection mechanism 5 includes an air outlet 501, a detection blade 502, a rotation speed detection device 503, a connecting pipe 504, an outer plate 505, an air pump 506 and a filling air bag 507. The air outlet 501 is arranged on the outer wall of the base 1, the detection blade 502 is rotatably arranged in the air outlet 501, and the rotation speed detection device 503 is arranged on the top of the air outlet 501. The rotation speed detection device 503 can detect the rotation speed of the detection blade 502. This is a prior art and will not be described in detail here. The connecting pipe 504 is arranged at the top of the air outlet 501, the connecting pipe 504 is communicated with the air outlet 501, the end of the connecting pipe 504 is the air inlet, the outer panel 505 is arranged on the side wall of the end of the connecting pipe 504, the air pump 506 is arranged on the side of the outer panel 505 away from the end of the connecting pipe 504, the filling airbag 507 is arranged on the side of the outer panel 505 away from the end of the connecting pipe 504, the air pump 506 is communicated with the filling airbag 507, and the connecting pipe 504 passes through the outer panel 505 and the filling airbag 507.

[0038] The number of clamping mechanisms 301 is the same as that of the adjusting ring 203, the height of the clamping mechanism 301 is the same as that of the adjusting ring 203, the transmission gear 309 is meshed with the toothed ring segment 204, the number of the supporting mechanisms is the same as that of the toothed ring segment 204, the distance between the card slots 308 is equal to the distance that the transmission gear 309 drives the slider 304 to slide through the rack 310 when the toothed ring segment 204 completely passes through the transmission gear 309 once when the adjusting ring 203 is rotated, and in the initial state, the clamping roller 306 is in contact with the side wall of the center rod 401 and the elastic telescopic rod 305 is slightly contracted, and the clamping roller 306 is 6 is squeezed inwardly under the elastic force of the elastic telescopic rod 305, and the buckle 307 is clamped in the clamping groove 308 on the side close to the center of the double-layer ring 303 to fix the slider 304. The rotating drum 201 is rotated. After the toothed ring segment 204 completely passes through the transmission gear 309, the transmission gear 309 drives the slider 304 to slide in the direction away from the double-layer ring 303 through the rack 310, and the buckle 307 enters the clamping groove 308 on the side away from the center of the double-layer ring 303. The rotating drum 201 is rotated to sequentially move the clamping roller 306 of the clamping mechanism 301 away from the center rod 401 from top to bottom.

[0039] The sealing cover 7 includes a sealing cylinder 701, an operating port 702, an air pump 2 703, a telescopic air duct 704 and an annular magnet 705. The sealing cylinder 701 is a cylindrical structure with an opening at the bottom. The sealing cylinder 701 is clamped on the top of the extension platform 202. The sealing cylinder 701 and the extension platform 202 are sealed by a sealing ring. The operating port 702 is arranged in a circular array on the side wall of the sealing cylinder 701. The air pump 2 703 is arranged on the top of the sealing cylinder 701. The telescopic air duct 704 is arranged below the top wall of the sealing cylinder 701. The annular magnet 705 is arranged at the bottom of the telescopic air duct 704. A rubber ring is arranged at the bottom of the annular magnet 705.

[0040] When in use, first remove the sealing cover 7, rotate the top plate 409, remove the top plate 409 and the screw 408, place the demonstration impeller 6 with the water inlet facing upward on the bottom plate 405, reinstall the top plate 409, and clamp the demonstration impeller 6 with the top plate 409 and the bottom plate 405 to keep it stable. Then, align the magnetic block 403 and insert it into the magnetic groove 107 to make it engage, align the central axis 4, and then cover the sealing cover 7 and check whether the operation port 702 is closed. Then, start the drive motor 103 and the air pump 2 703 to start the dynamic balancing test of the demonstration impeller 6. The drive motor 103 drives the central axis 4 and the demonstration impeller 6 to rotate through the turntable 104, and the air pump 2 703 draws air outward to make the sealing cover 7 and the adjustment cylinder 2 The air inside is reduced, making it approach a vacuum state, reducing the influence of gas fluctuations during the rotation of the impeller and increasing the test accuracy. Then, the drum 201 is slowly rotated, and the toothed ring segment 204 of the adjusting ring 203 passes through the transmission gear 309 from top to bottom and drives the transmission gear 309, so that the transmission gear 309 drives the slider 304 away from the center rod 401 through the rack 310, so that the clamping roller 306 does not contact the center rod 401, and gradually reduces the lateral support for the center rod 401. If the mass distribution of the demonstration impeller 6 is unbalanced, according to the degree of imbalance, after the drum 201 is rotated by a certain angle, the lateral G value will exceed the support strength of the remaining clamping mechanism 301, and the magnetic block 403 will come out of the magnetic groove 107, and the center Rod 401 is tilted, the test fails, and the driving motor 103 stops rotating; if the demonstration impeller 6 can still continue to rotate by the magnetic attraction and limit of the magnetic block 403 and the magnetic groove 107 after the clamping roller 306 of the clamping mechanism 301 is completely separated from the center rod 401, it means that the dynamic balance test of the current demonstration impeller 6 has passed; at the same time, before or after the dynamic balance test, the operating port 702 can be opened, the top plate 409 can be rotated to remove the water inlet of the demonstration impeller 6, and the telescopic air duct 704 can be pulled down to make the annular magnet 705 adsorb the impeller surface, so that the telescopic air duct 704 is connected to the water inlet of the demonstration impeller 6, and the filling air bags 507 are placed one by one in the gaps between the blades of the demonstration impeller 6, and the air pump 507 is started. 06 inflates the filling airbag 507 to seal the water outlet of the demonstration impeller 6, and then controls the air pump 2 703 to blow air into the water inlet of the demonstration impeller 6. The gas blown out by the air pump 2 703 enters the demonstration impeller 6 and is diverted by the blades and discharged to each water outlet, and is blown out from the air outlet 501 along the corresponding connecting pipe 504. When passing through the air outlet 501, it drives the detection fan blade 502 to rotate. If the blades are unevenly distributed, the air volume distributed by the gap between each blade is different, and the wind speed of each air outlet 501 is also different. Whether the rotation speed displayed by the rotation speed detection device 503 of each air outlet 501 is balanced can be observed to determine whether the blade distribution is uniform. If the rotation speed difference displayed by each rotation speed detection device 503 is too large, it means that the blade distribution is uneven.

[0041] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0042] The present invention and its embodiments are described above, and such description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if ordinary technicians in the field are inspired by it, without departing from the purpose of the invention, they can design a structure and embodiment similar to the technical solution without creativity, which should belong to the protection scope of the present invention.

Claims

1. A centrifugal pump impeller detection device, characterized in that: The invention comprises a base (1), an adjustment cylinder (2), a clamping adjustment mechanism (3), a central axis (4), a flow detection mechanism (5) and a sealing cover (7), wherein the adjustment cylinder (2) is rotatably arranged on the top of the base (1), the clamping adjustment mechanism (3) is arranged on the inner side of the adjustment cylinder (2), the central axis (4) is arranged on the inner side of the clamping adjustment mechanism (3), the flow detection mechanism (5) is arranged in a circular array on the side wall of the base (1), and the sealing cover (7) is arranged above the adjustment cylinder (2). The base (1) comprises a base bin (101), an annular slide groove (102), a drive motor (103) and a rotary The base (104) is provided with a circular slide groove (102) on the top of the base bin (101), the driving motor (103) is provided in the base bin (101), the turntable (104) is rotatably provided on the top wall of the base bin (101), the turntable (104) penetrates the top wall of the base bin (101), a buffer bin (105) is provided in the turntable (104), a magnetic suction groove (107) is provided on the bottom wall of the buffer bin (105), a through hole (106) is provided on the top wall of the turntable (104), and an output end of the driving motor (103) is drivingly connected to the turntable (104); The central axis (4) comprises a central rod (401), a limiting plate (402), a magnetic block (403), a slot (404), a bottom plate (405), an insert rod (406), a threaded sleeve (407), a screw rod (408) and a top plate (409); the limiting plate (402) is arranged at the bottom of the central rod (401); the limiting plate (402) is arranged in the buffer bin (105); the radius of the limiting plate (402) is greater than the radius of the through hole (106) and smaller than the radius of the buffer bin (105); the height of the limiting plate (402) is smaller than the height of the buffer bin (105); the magnetic block (403) is arranged at the bottom of the limiting plate (402); the magnetic block (403) The magnetic attraction block (403) is arranged in the magnetic attraction groove (107), the magnetic attraction block (403) is engaged with the magnetic attraction groove (107), the slot (404) is opened at the top of the center rod (401), the bottom plate (405) is arranged above the center rod (401), the insertion rod (406) is arranged on the bottom wall of the bottom plate (405), the insertion rod (406) is inserted in the slot (404), the insertion rod (406) is engaged with the slot (404), the threaded sleeve (407) is open at the top, the threaded sleeve (407) is arranged at the top of the bottom plate (405), the screw rod (408) is rotatably arranged in the threaded sleeve (407), and the threaded sleeve (407) is threadedly engaged with the screw rod (408); The clamping adjustment mechanism (3) comprises a clamping mechanism (301) and a connecting rod (302). The clamping mechanism (301) is arranged in a linear array. The clamping mechanism (301) comprises a double-layer ring (303) and a supporting mechanism. The double-layer ring (303) is a double-layer circular ring. The supporting mechanism is arranged in a circular array between the double-layer rings (303). The supporting mechanism comprises a slider (304), an elastic telescopic rod (305), a clamping roller (306), a buckle (307), a clamping groove (308), a transmission gear (309) and a rack (310). The slider (304) is slidably clamped between the double-layer rings (303). The sliding track of the slider (304) points to the center of the double-layer ring (303). The elastic telescopic rod (305) is arranged at one end of the slider (304) close to the center of the double-layer ring (303). The clamping roller (306) is rotatably arranged on the elastic telescopic rod. (305) is close to one end of the center of the double-layer ring (303), the buckle (307) is arranged at the bottom of the slider (304), the slot (308) is arranged on the bottom wall of the double-layer ring (303), the buckle (307) can be locked in the slot (308), there are two slots (308) under the slider (304), the line between the slots (308) is parallel to the sliding track of the slider (304), the transmission gear (309) ) is rotatably arranged on the side of the slider (304), the transmission gear (309) is rotatably arranged between the double-layer rings (303), the transmission gear (309) and the double-layer rings (303) are interference fit, the rack (310) is arranged on the side wall of the slider (304) close to the transmission gear (309), the rack (310) and the transmission gear (309) are meshed, and the connecting rod (302) passes through and is connected to the clamping mechanism (301); The adjusting cylinder (2) comprises a rotating cylinder (201) and an extension platform (202); the rotating cylinder (201) is a cylinder body with a through hole inside; the extension platform (202) is arranged around the outside of the rotating cylinder (201); the bottom of the rotating cylinder (201) is rotatably clamped in the annular slide groove (102); the rotating cylinder (201) and the annular slide groove (102) are sealed by a sealing ring; the inner wall of the rotating cylinder (201) is provided with an adjusting ring (203) in a linear array; the inner wall of the adjusting ring (203) is provided with a toothed ring segment (204) in a circumferential array.

2. A centrifugal pump impeller detection device according to claim 1, characterized in that: The transmission gear (309) is meshed with the gear ring segment (204).

3. A centrifugal pump impeller detection device according to claim 2, characterized in that: The flow detection mechanism (5) comprises an air outlet (501), a detection blade (502), a rotation speed detection device (503), a connecting pipe (504), an outer plate (505), an air pump (506) and a filling air bag (507); the air outlet (501) is arranged on the outer wall of the base (1); the detection blade (502) is rotatably arranged in the air outlet (501); the rotation speed detection device (503) is arranged at the top of the air outlet (501); and the connecting pipe (504) is arranged at the air outlet (501). At the top, the connecting pipe (504) is communicated with the air outlet (501), the outer panel (505) is arranged on the side wall of the end of the connecting pipe (504), the air pump 1 (506) is arranged on a side of the outer panel (505) away from the end of the connecting pipe (504), the filling air bag (507) is arranged on a side of the outer panel (505) away from the air pump 1 (506), the air pump 1 (506) is communicated with the filling air bag (507), and the connecting pipe (504) passes through the outer panel (505) and the filling air bag (507).

4. A centrifugal pump impeller detection device according to claim 3, characterized in that: The sealing cover (7) comprises a sealing cylinder (701), an operating port (702), a second air pump (703), a telescopic air duct (704) and an annular magnet (705); the sealing cylinder (701) is a cylindrical structure with an opening at the bottom; the sealing cylinder (701) is clamped on the top of the extension platform (202); the operating port (702) is arranged in a circular array on the side wall of the sealing cylinder (701); the second air pump (703) is arranged on the top of the sealing cylinder (701); the telescopic air duct (704) is arranged below the top wall of the sealing cylinder (701); the annular magnet (705) is arranged at the bottom of the telescopic air duct (704); and a rubber ring is arranged at the bottom of the annular magnet (705).

5. A centrifugal pump impeller detection device according to claim 4, characterized in that: The top plate (409) is arranged on the top of the screw rod (408), and the center rod (401), the limiting plate (402), the bottom plate (405), the threaded sleeve (407), the screw rod (408) and the top plate (409) are coaxially arranged.

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