Impeller dynamic balance test device

Abstract

The present application discloses an impeller dynamic balancing test device, which relates to the field of centrifugal pump balancing test, and includes a core shaft, and an impeller sleeved on the outside of the core shaft, one end of the core shaft is fixed with a cone block for abutting and fixing the impeller; it also includes a support assembly that is equally divided and arranged in a support mechanism and is used to support the impeller, the outer side of the support mechanism is provided with a tightening mechanism for laterally tightening the impeller, one side of the support assembly contacts the surface of the core shaft and achieves support; one side of the support mechanism is provided with a driving assembly for driving the support assembly to move and achieve support and tightening. Impellers of different sizes can be fixed by extending the outer support rod, which greatly increases the practicality and adaptability of the present application, and the impeller can be fixed longitudinally and laterally by the driving assembly, with one-button operation, quick and convenient installation and disassembly, saving time and effort.

Description

Technical Field

[0001] The present application relates to the field of centrifugal pump balancing test, and in particular to an impeller dynamic balancing test device. Background Art

[0002] Multistage pump is a very common centrifugal pump, which is often used in petroleum, petrochemical, thermal power, nuclear power, municipal and other working conditions that require high outlet pressure. Due to the large number of impellers, complex internal structure, high working speed and large flexibility of the rotor when rotating, in the assembly process of multistage pump, each stage of impeller needs to be subjected to G6.3 dynamic balancing test according to GB / T9239.1, and then installed on the product shaft as a whole for G2.5 or even G1.0 rotor dynamic balancing test, the purpose is to remove as much imbalance as possible from each stage of impeller, reduce pump vibration and improve pump stability.

[0003] For example, a multi-purpose impeller dynamic balance test device with publication number CN115182891A still has the following shortcomings in actual use:

[0004] The above patent mainly realizes the positioning and tightening of the impeller by the cooperation of the centering cone sleeve, the compensating sleeve, the impeller positioning section and the round nut. However, for impellers of different sizes, it is still necessary to adjust the impeller mounting section and the centering cone sleeve, which will lead to insufficient adaptability. At the same time, locking by the round nut will make disassembly difficult due to the large size of the round nut. Summary of the invention

[0005] In order to improve the problems of insufficient balancing tests on different impellers and difficulty in disassembly, the present application provides an impeller dynamic balancing test device.

[0006] The present application provides an impeller dynamic balance test device that adopts the following technical solution:

[0007] An impeller dynamic balance test device comprises a core shaft and an impeller sleeved on the outside of the core shaft, wherein one end of the core shaft is fixedly provided with a cone block for abutting and fixing the impeller;

[0008] It also includes a supporting assembly that is equally divided and arranged in the supporting mechanism and is used to support the impeller, one side of the supporting assembly contacts the surface of the core shaft and supports it, and a tightening mechanism for tightening the impeller laterally is arranged on the outer side of the supporting mechanism;

[0009] A driving assembly for driving the supporting assembly to move and achieve support is provided on one side of the supporting mechanism, and the driving assembly is provided between two supporting assemblies;

[0010] A counterweight block for balancing the total mass of the support assembly is fixedly arranged in the support mechanism at a position opposite to the support assembly, so as to balance the center of gravity of the support mechanism, the plurality of support assemblies and the drive assembly.

[0011] By adopting the above technical solution, the supporting mechanism is arranged in the middle cavity of the impeller. Subsequently, the rotating driving assembly makes the supporting assembly work, thereby fixing the impeller on the core shaft. At the same time, the impeller can be fixed in the transverse and longitudinal directions through the supporting assembly, so that the impeller can remain stable during rotation.

[0012] Preferably, the supporting mechanism comprises an annular shell, the outer surface of the annular shell is equally divided with a plurality of outer through holes for sliding of the outer support rod, the inner surface of the annular shell is equally divided with a plurality of inner through holes for sliding of the inner support rod, the counterweight block is fixed on the inner wall of the annular shell, an outer gear ring is rotatably provided on the middle surface of the inner cavity of the annular shell, a fixing ring for abutting and limiting the outer gear ring is fixed on the middle surface of the inner cavity of the annular shell, and a cover plate is fixed at the opening on one side of the annular shell.

[0013] By adopting the above technical scheme, the setting of the outer perforation can limit the movement of the outer support rod, and the setting of the inner perforation can limit the movement of the inner support rod. At the same time, the setting of the counterweight block can make the device body balanced, and the setting of the outer gear ring can make the gears of several support assemblies rotate synchronously, thereby making several outer support rods and several inner support rods move synchronously. At the same time, a smooth section of the semi-threaded rod moves through the cover plate.

[0014] Preferably, the drive assembly includes a gear three rotatably arranged on the inner wall of the annular shell and meshing with the outer gear ring, a worm wheel coaxially fixed thereto is fixed on one side of the gear three, a worm screw fixed to one end of a transmission rod is meshed on one side of the worm wheel, a fixed seat movably penetrated by the transmission rod is fixed on the inner wall of the annular shell, and one end of the transmission rod away from the worm screw movably penetrates the annular shell and its end extends to the outside.

[0015] By adopting the above technical solution and utilizing the characteristics of the turbine and the worm, the support assembly will not loosen after fixing the impeller and the core shaft. Because the worm wheel will not drive the worm to rotate, the self-locking capability is achieved, which effectively prevents the impeller from loosening during rotation. The set fixed seat supports the transmission rod.

[0016] Preferably, the support assembly comprises a semi-threaded rod rotatably arranged on the inner wall of the ring shell, and the smooth surface of the lower half of the semi-threaded rod is respectively sleeved and fixed with a bevel gear 2 and a gear 4 meshing with the outer gear ring from top to bottom.

[0017] By adopting the above technical solution, the annular shell and the cover plate can support the semi-threaded rod. At the same time, the semi-threaded rod can drive the helical gear 2, gear 4 and gear 2 to rotate to realize power transmission.

[0018] Preferably, a connecting shaft rotatably arranged with the inner wall of the ring shell is arranged between the gear four and the gear three, a seesaw is fixedly mounted on the middle part of the connecting shaft, and a bevel gear one meshing with the bevel gear two is fixedly mounted on the middle and upper part of the connecting shaft.

[0019] By adopting the above technical solution, the setting of the connecting shaft can support and fix the seesaw while also allowing the seesaw to rotate around the connecting shaft as the axis, thereby allowing the seesaw to move according to the lever principle.

[0020] Preferably, the inner ring wall and the outer ring wall of the annular shell are respectively and equally dividedly provided with a plurality of inner through holes and a plurality of outer through holes, each of the inner through holes is staggered, an inner support rod is movably inserted in each of the inner through holes, and an outer support rod is movably penetrated in each of the outer through holes, each of the inner support rods is fixedly provided with side strips on both sides located inside the annular shell, and a built-in spring for connection and reset is fixedly provided between the side of each side strip facing the inner ring wall of the annular shell and the inner ring wall of the annular shell.

[0021] By adopting the above technical solution, both the outer perforations and the inner perforations play a role of limiting and guiding, so that the outer support rod and the inner support rod can move more stably and smoothly. At the same time, the set side strips can connect and fix the built-in spring, and the built-in spring connects and fixes the inner support rod to avoid separation of the inner support rod and the ring shell.

[0022] Preferably, an inner fixing sleeve is slidably sleeved on the surface of one end of each inner support rod away from the side strip, longitudinal sliding grooves for guiding and limiting the inner support rod are provided at both ends of the inner cavity of the inner fixing sleeve, and an arc-shaped stop block for abutting against the surface of the core shaft for fixation is fixed at one end of each inner fixing sleeve, and two symmetrically arranged springs are fixed between the bottom of the inner cavity of the inner fixing sleeve and the end face of the inner support rod, and the extension lines of the arc surfaces of several arc-shaped stop blocks can be spliced ​​into a circle.

[0023] By adopting the above technical solution, the longitudinal sliding groove can provide sliding limit guide for the inner support rod, and the inner fixed sleeve can continuously apply pressure to the core shaft under the reaction force of spring two, so that the arc-shaped resistance block can firmly install the support mechanism on the core shaft. Spring two can also connect the inner fixed sleeve and the inner support rod to prevent the two from separating.

[0024] Preferably, external springs for connection and reset are fixedly arranged between the two ends of the outer support rod located on the outside and the outer ring wall surface of the ring shell, and rollers that fit the surface of the seesaw are rotatably arranged in the grooves facing the outer support rod and the inner support rod;

[0025] Under normal conditions, the rollers of the outer support rod and the inner support rod are located at the position of the connecting shaft on the surface of the seesaw.

[0026] By adopting the above technical scheme, the setting of the external spring can connect and fix the outer support rod and the ring shell to avoid separation of the two. At the same time, the setting roller rolling on the surface of the seesaw can convert the rotational movement into a linear movement, thereby realizing the ability of tightening. The setting of the roller greatly reduces the friction with the surface of the seesaw, thereby making the movement of the outer support rod and the inner support rod smoother. At the same time, a rotating shaft is fixed in the middle of the roller to facilitate the connection with the inner support rod and the outer support rod.

[0027] Preferably, the clamping mechanism includes a U-shaped frame fixed on the surface of the cover plate and movably penetrated by a semi-threaded rod, the threaded portion of the semi-threaded rod is located in the inner cavity of the U-shaped frame, and a moving rod threadedly arranged with the threaded portion of the semi-threaded rod is slidably arranged in the inner cavity of the U-shaped frame, the upper end of the U-shaped frame away from one end of the semi-threaded rod is threadedly connected with a screw rod 1 in contact with the surface of the moving rod, the end of the semi-threaded rod located on one side of the U-shaped frame is sleeved and fixed with a gear 2, and the screw rod 1 is sleeved and fixed with a gear 1 on the side away from the U-shaped frame, and the upper end of the U-shaped frame is rotatably provided with a large spur gear meshing with gear 2 and gear 1.

[0028] By adopting the above technical solution, the U-shaped frame plays a supporting role, and the transmission of the large spur gear can make the screw rod 1 always located on the surface of the moving rod, that is, the moving distance of the moving rod is the same as the direction and distance of the screw rod 1, and then when the moving rod is subjected to force, the screw rod 1 can play a supporting role, thereby avoiding deformation or breakage of the moving rod.

[0029] Preferably, a fixing sleeve is fixedly provided at the end of the moving rod away from the second gear, and limiting sliding grooves connected to the inner cavity of the fixing sleeve are provided on both sides of the surface of the fixing sleeve, and a V-shaped abutment is slidably provided in the inner cavity of the fixing sleeve, and a spring 1 is fixedly provided between one end of the V-shaped abutment located in the inner cavity of the fixing sleeve and the bottom of the inner cavity of the fixing sleeve, and limiting sliding blocks sliding in the limiting sliding grooves are fixedly provided on both sides of one end of the V-shaped abutment located in the inner cavity of the fixing sleeve, and the V-shaped abutment faces one side of the cone block.

[0030] By adopting the above technical solution, the setting of the limit slide groove plays a role of limit guide for the limit slider, avoiding separation of the fixing sleeve and the V-shaped butt head. The set spring pair has a buffering effect on the V-shaped butt head, avoiding excessive pressure applied by the V-shaped butt head to cause damage to the impeller. At the same time, the reaction force of spring one can better fix the impeller.

[0031] In summary, the present application includes at least one of the following beneficial technical effects:

[0032] 1. The impeller can be firmly fixed on the core shaft by using the support assembly, and the impellers of different sizes can be fixed by extending the outer support rod, which greatly increases the practicality and adaptability of the application. At the same time, the impeller can be longitudinally fixed by the drive assembly, with one-button operation, and quick and convenient installation and disassembly, saving time and effort;

[0033] 2. The impeller can be laterally fixed with the aid of the tightening mechanism. The impeller can be laterally fixed while being longitudinally fixed, all of which are achieved through the drive assembly, thereby further improving the ability of the present application to quickly disassemble the impeller. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is an overall axial side schematic diagram of the present application;

[0035] Figure 2 This is a schematic diagram of the connection between the support mechanism, the clamping mechanism and the driving assembly of the present application;

[0036] Figure 3 This is a cross-sectional view of the support mechanism and a schematic diagram of the drive assembly structure of the present application;

[0037] Figure 4 This is a schematic diagram of the connection between the tightening mechanism and the supporting assembly and the supporting mechanism of the present application;

[0038] Figure 5 This is a schematic diagram of the connection between the tightening mechanism and the supporting assembly of the present application;

[0039] Figure 6 This is a cross-sectional schematic diagram of the internal fixing sleeve and the internal support rod of the present application;

[0040] Figure 7 This is a schematic diagram of the connection of the various structures of the support assembly of this application;

[0041] Figure 8 This is a cross-sectional schematic diagram of the tightening mechanism of the present application;

[0042] Fig. 9 This is a schematic diagram of the separation of the limiting slide groove and the limiting slider of the present application.

[0043] Reference numerals: 100, core shaft; 200, impeller; 300, cone block; 400, counterweight block;

[0044] 500, abutting mechanism; 501, U-shaped frame; 502, gear 1; 503, large spur gear; 504, gear 2; 505, moving rod; 506, fixing sleeve; 507, V-shaped abutting head; 508, limiting slider; 509, screw 1; 510, limiting slide groove; 511, spring 1;

[0045] 600, support mechanism; 601, ring shell; 602, cover plate; 603, fixing ring; 604, outer gear ring; 605, outer perforation; 606, inner perforation;

[0046] 700, driving assembly; 701, transmission rod; 702, fixed seat; 703, worm; 704, worm wheel; 705, gear three;

[0047] 800, support assembly; 801, outer support rod; 802, arc-shaped stop block; 803, inner fixed sleeve; 804, inner support rod; 805, seesaw; 806, bevel gear one; 807, gear four;

[0048] 808, external spring; 809, internal spring; 810, side strip; 811, semi-threaded rod; 812, bevel gear 2; 813, roller; 814, longitudinal slide groove; 815, spring 2; 816, connecting shaft. DETAILED DESCRIPTION

[0049] The following is combined with Figure 1-Figure 9 This application is described in further detail.

[0050] The embodiment of the present application discloses an impeller dynamic balancing test device.

[0051] It should be noted that the centering requirements, assembly requirements and material requirements of this application are the same as those of the patent with application number CN115182891A, and are all national standards, so they will not be described in detail. All structures of this application are set to metal materials.

[0052] Reference Figure 1-Figure 3 A device for testing dynamic balancing of an impeller includes a core shaft 100 and an impeller 200 sleeved on the outside of the core shaft 100. A cone block 300 is fixed at one end of the core shaft 100 to abut and fix the impeller 200.

[0053] The middle cavity of the impeller 200 is inserted into the outside of the core shaft 100 and the end thereof abuts against the inclined surface of the cone block 300 . The self-centering ability of the cone block 300 can be used to center one end of the impeller 200 .

[0054] Reference Figure 1-Figure 3, and also includes a support assembly 800 that is equally divided and arranged in the support mechanism 600. The support assembly 800 supports the impeller 200. One side of the support assembly 800 contacts the surface of the core shaft 100 to achieve support. The support mechanism 600 includes an annular shell 601. The annular shell 601 is respectively provided with an outer annular wall and an inner annular wall. The outer surface of the annular shell 601 is equally divided and opened with a plurality of outer through holes 605. The inner parts of the plurality of outer through holes 605 are slidably arranged with the outer surface of the outer support rod 801 and achieve clearance fit. The inner surface of the annular shell 601 is equally divided and opened with a plurality of inner through holes 606. The inner parts of the plurality of inner through holes 606 are slidably arranged with the outer wall of the inner support rod 804 and achieve clearance fit. The counterweight block 400 is fixed on the inner wall of the annular shell 601. The setting of the counterweight block 400 needs to be adjusted according to the center of gravity of the entire device, so that the center of gravity of the entire device coincides with the center of the circle of the annular shell 601, so that the rotation of the device is more stable. The inner ring wall surface in the middle of the inner cavity of the ring shell 601 is sleeved and rotated with the middle of the outer gear ring 604. A fixing ring 603 is fixed on the middle surface of the inner ring wall in the inner cavity of the ring shell 601. The fixing ring 603 abuts against the outer gear ring 604 to limit the position, and the outer diameter of the fixing ring 603 extends to the tooth groove part of the outer gear ring 604. The opening on one side of the ring shell 601 is threadedly fixed to the cover plate 602 by screws.

[0055] After the user has installed the support assembly 800, the support mechanism 600, the impeller 200 and the core shaft 100, the rotation axis of the core shaft 100 is aligned with the center of the circle of the annular shell 601, so that the impeller 200 rotates more smoothly, and the balance of the impeller 200 can be better detected. The impeller 200 of different sizes can be fixed through the support assembly 800. The mass of the counterweight block 400 needs to be installed and fixed according to the balance of the device, and it is a one-time installation and does not need to be adjusted later. If adjustment is required, it can be replaced by bolts. The outer support rod 801 is forced to slide in the outer through hole 605 to achieve the tightening and release of the impeller 200, and the inner support rod 804 slides in the inner through hole 606 to achieve the tightening, fixation and release of the support mechanism 600 and the core shaft 100. The above settings are convenient for supporting the impeller 200 at different positions.

[0056] At the same time, the outer gear ring 604 is subjected to force to rotate on the inner ring wall surface in the middle of the inner cavity of the ring shell 601, thereby synchronously rotating the gear four 807 of several groups of support assemblies 800, thereby making the support assembly 800 synchronously fix the impeller 200 and the core shaft 100, maintaining synchronization to avoid affecting the balance of the device due to asynchrony. Therefore, the structures installed on the support mechanism 600 of the present application have the same structural quality.

[0057] Reference Figure 2 , Figure 4A driving assembly 700 for driving the supporting assembly 800 to move is arranged on one side of the supporting mechanism 600. The supporting assembly 800 is used to support and tighten the impeller 200. The driving assembly 700 is arranged between two driving supporting assemblies 800. The driving assembly 700 includes a gear 3 705 rotatably arranged on the inner wall of the ring shell 601. The outer gear ring 604 meshes with the gear 3 705 to realize transmission. A worm wheel 704 coaxially fixed with the gear 3 705 is fixed in the middle of the gear 3 705. The diameter of the gear 3 705 is the same as that of the worm wheel 704. A worm 703 is meshed on one side of the worm wheel 704. One end of the worm 703 is meshed with the transmission rod. One end of the ring shell 601 is fixedly connected, and a gap is left between the lower end surface of the seesaw 805 and the threaded parts of the worm wheel 704 and the worm 703 for the seesaw 805 to move, so as to avoid interference and affect the rotation of the seesaw 805. A fixed seat 702 is fixed on the inner wall of the ring shell 601, and the transmission rod 701 movably passes through one side of the fixed seat 702. One end of the transmission rod 701 away from the worm 703 movably passes through the ring shell 601. The end of the transmission rod 701 extends to the outside of the ring shell 601 and the end located on the outside is provided with a hexagonal groove, so that the hexagonal tool can be inserted and rotated. The transmission rod 701 is located between the two outer support rods 801 and the end protrudes 2mm-4mm from the surface of the ring shell 601.

[0058] When the user adjusts the support assembly 800, the user inserts the tool into the end of the transmission rod 701 and applies force to rotate it. The transmission rod 701 drives the worm 703 to rotate and then drives the worm wheel 704 to rotate. The worm wheel 704 drives the coaxial gear three 705 to rotate. It should be noted that (the two ends of the axis in the middle of the worm wheel 704 and the gear three 705 are respectively movably interlaced with the cover plate 602 and the inner wall of the ring shell 601 to achieve limited rotation. Gear three 705 will drive the outer ring gear 604 to rotate).

[0059] Reference Figure 4-Figure 7 The support assembly 800 includes a semi-threaded rod 811 rotatably set on the inner wall of the ring shell 601, both ends of the semi-threaded rod 811 are set as smooth surfaces and a section located in the U-shaped frame 501 is set as a threaded portion, the smooth surface of the lower half of the semi-threaded rod 811 is respectively sleeved and fixed with a bevel gear 2 812 and a gear 4 807 meshing with the outer gear ring 604, the bevel gear 2 812 is located on the upper part of the gear 4 807, and a connecting shaft 816 rotatably set with the inner wall of the ring shell 601 is provided between the gear 4 807 and the gear 3 705, the middle part of the connecting shaft 816 is sleeved and fixed with a seesaw 805 located between the bevel gear 2 812 and the gear 4 807, and the middle and upper part of the connecting shaft 816 is sleeved and fixed with a bevel gear 1 806, which meshes with the bevel gear 2 812.

[0060] The outer gear ring 604 will drive the gear four 807 of the supporting components 800 to rotate and then drive the bevel gear two 812 to rotate through the semi-threaded rod 811. The bevel gear two 812 will drive the bevel gear one 806 to rotate and then drive the seesaw 805 to rotate through the connecting shaft 816. The transmission accuracy of the bevel gear one 806 and the bevel gear two 812 is high, which effectively improves the transmission efficiency.

[0061] Reference Figure 4-Figure 7The annular shape of the outer wall of the ring shell 601 is called the outer annular wall, and the annular shape of the inner wall of the ring shell 601 is called the inner annular wall. The inner annular wall of the ring shell 601 is provided with a plurality of inner perforations 606 in annular shapes and evenly spaced apart. The outer annular wall of the ring shell 601 is provided with a plurality of outer perforations 605 in annular shapes and evenly spaced apart. Each inner perforation 606 is staggered with each outer perforation 605. The inside of each inner perforation 606 is movably interlaced with the surface of the inner support rod 804. The inside of each outer perforation 605 is movably penetrated with the surface of the outer support rod 801. Each inner support rod 804 is located on both sides of the inner ring shell 601 and is integrally formed with side strips 810. The distance at which the side strips 810 extend is much greater than the distance at which the built-in spring 80 9 in diameter, a built-in spring 809 is fixedly arranged between the side of each side strip 810 facing the inner ring wall of the ring shell 601 and the inner ring wall of the ring shell 601, and the built-in spring 809 is used to connect and reset the inner support rod 804, and the surface of each inner support rod 804 away from the side strip 810 is slidably sleeved with an inner fixing sleeve 803, and both sides of each inner support rod 804 away from the side strip 810 are fixed with sliders sliding in the longitudinal sliding groove 814, and longitudinal sliding grooves 814 for guiding and limiting the inner support rod 804 are opened at both ends of the inner cavity of the inner fixing sleeve 803, and the longitudinal sliding groove 814 is located at one end of the opening of the inner fixing sleeve 803, and is not set as a through groove to guide the inner The support rod 804 achieves a limiting effect to prevent the inner support rod 804 from separating from the inner fixed sleeve 803. An arc-shaped stop block 802 is fixed at one end of each inner fixed sleeve 803. One end of the arc-shaped stop block 802 is set to an arc shape and is used to abut against the surface of the core shaft 100 to achieve fixation. Two symmetrically arranged springs 815 are fixed between the bottom of the inner cavity of the inner fixed sleeve 803 and the end face of the inner support rod 804, and a movable gap is reserved between the two springs 815 to avoid interference. The extended lines of the arc surfaces of several arc-shaped stop blocks 802 can be spliced ​​into a circle to match the core shaft 100 to improve the fit. The end of the outer support rod 801 located on the outside is set to a curved convex head to It can better fit with the inner cavity surface of the impeller 200 and extend a distance at both ends to facilitate connection and fixation with the external spring 808. The external spring 808 for connecting and resetting is fixed between the two ends of the outer support rod 801 located on the outside and the outer ring wall surface of the annular shell 601. Slots are provided at the positions facing the outer support rod 801 and the inner support rod 804. Rollers 813 that fit with the surface of the seesaw 805 are rotatably arranged in the slots. The rollers 813 are preferably made of titanium metal with high strength and light weight. Under normal circumstances, the rollers 813 of the outer support rod 801 and the rollers 813 of the inner support rod 804 are respectively located on the surface of the seesaw 805 and on both sides of the connecting shaft 816.

[0062] The surfaces of both ends of the seesaw 805 are provided with arc-shaped surfaces, which are reduced from the middle of the seesaw 805 toward the outer ends, so as to facilitate the rolling of the roller 813.

[0063] Using the spring stiffness calculation formula: To calculate the stiffness coefficients of the external spring 808, the internal spring 809, the spring 2 815 and the spring 1 511.

[0064] The meaning of each item in the above formula is: G = shear elastic modulus [MPa] G value is: carbon steel 80000, stainless steel 72000, therefore, the material of the spring needs to be set according to actual needs

[0065] d = wire diameter [mm, in]

[0066] n = effective number of turns [-]

[0067] D = center diameter [mm, in]

[0068] k = spring constant [N / mm, lb / in]

[0069] Therefore, the stiffness of the external spring 808, the internal spring 809, the spring 2 815 and the spring 1 511 needs to be designed to be relatively high so that they will not deform under the action of different impeller 200 masses and can only deform under the drive of the drive assembly 700.

[0070] When the seesaw 805 rotates with the connecting shaft 816 as the axis, the inner support rod 804 and the outer support rod 801 are driven to move in opposite directions in the form of a lever principle. When the inner support rod 804 and the outer support rod 801 move, the roller 813 set therein rolls on the surface of the seesaw 805. In order to maintain the synchronization of the transmission between the gears, it is necessary to set the gear ratios of the various gears of the device so that the outer support rod 801 and the inner support rod 804 move synchronously. The inner support rod 804 is pushed by the roller 813 to move in the inner perforation 60. 6 The internal movement will squeeze the built-in spring 809 and the two springs 815. Under the reaction force of the spring 815, the arc-shaped stop block 802 will be tightly abutted against the surface of the core shaft 100 through the internal fixing sleeve 803 to achieve fixation. Because the arc-shaped stop block 802 fits the surface of the core shaft 100, the self-centering effect keeps the support mechanism 600 and the core shaft 100 vertical. Due to the rigidity of the spring 815 and the built-in spring 809, the device will not be deformed under the gravity of the impeller 200 and will remain in its original state.

[0071] At the same time, the seesaw 805 pushes the roller 813 to push the outer support rod 801 to move outward, and the outer support rod 801 stretches the external spring 808 so that the end of the outer support rod 801 gradually abuts against the inside of the middle cavity of the impeller 200 and achieves tight contact, thereby supporting the impeller 200, making the transverse axis of the impeller 200 coincide with the axis of the core shaft 100 and the annular shell 601, thereby achieving smooth rotation and more rapid detection of the balance of the impeller 200.

[0072] Reference Figure 2A counterweight block 400 for balancing the total mass of the driving support assembly 800 is fixedly provided in the supporting mechanism 600 at a position relative to the driving support assembly 800. The number of counterweight blocks 400 can be fixedly provided at any position inside the annular shell 601 to facilitate balance adjustment of the device so that the center of gravity of the supporting mechanism 600, the plurality of supporting assemblies 800 and the driving assembly 700 are balanced. The counterweight block 400 is preferably made of lead metal, which has a large mass and a small volume and will not occupy the space inside the annular shell 601.

[0073] Reference Figure 5 , Figure 8 , Fig. 9 The outer side of the support mechanism 600 is provided with a pressing mechanism 500 for laterally pressing the impeller 200. The pressing mechanism 500 includes a U-shaped frame 501 fixed on the surface of the cover plate 602. One end of the U-shaped frame 501 is movably penetrated by a semi-threaded rod 811. The threaded portion of the semi-threaded rod 811 is located in the inner cavity of the U-shaped frame 501. A moving rod 505 is slidably arranged in the inner cavity of the U-shaped frame 501. One end of the moving rod 505 away from the V-shaped abutment 507 is threadedly arranged with the threaded portion of the semi-threaded rod 811. The upper end of the U-shaped frame 501 is threadedly provided with a screw rod 509 at one end away from the semi-threaded rod 811, and the bottom surface of the screw rod 509 contacts the surface of the moving rod 505 to achieve a supporting effect. The end of the semi-threaded rod 811 located on one side of the U-shaped frame 501 is sleeved and fixed with a gear 504, and the screw rod 509 is sleeved and fixed with a gear 502 at the side away from the U-shaped frame 501. The upper end of the U-shaped frame 501 is rotatably provided with a large spur gear 503, and the surface of the large spur gear 503 is in contact with the gear 2 504 and the gear 1 505. 02 meshes and realizes transmission, the height of the large spur gear 503 is greater than the distance between the lower end surface of the gear 1 502 and the surface of the U-shaped frame 501, the end of the moving rod 505 away from the gear 2 504 is fixedly connected to the tail surface of the fixed sleeve 506, and the surface of the fixed sleeve 506 is provided with limited sliding grooves 510 on both sides, and the two limited sliding grooves 510 are connected with the inner cavity of the fixed sleeve 506, and the long rod part of the V-shaped head 507 is slidably arranged in the fixed sleeve 506, and the V-shaped head 507 is located at one end of the inner cavity of the fixed sleeve 506 A spring 511 is fixed between the end and the bottom of the inner cavity of the fixed sleeve 506, and limiting sliders 508 are fixed on both sides of one end of the V-shaped butt 507 located in the inner cavity of the fixed sleeve 506. The two limiting sliders 508 slide in the limiting slide groove 510 to achieve limiting. The V-shaped butt 507 faces the side of the cone block 300. The extended arc of the inclined surface of several V-shaped butts 507 can make one end of several V-shaped butts 507 form a cone to achieve a self-centering effect, so that the impeller 200 is in a centered state.

[0074] When the semi-threaded rod 811 rotates, it drives the gear 2 504 to rotate and then drives the large spur gear 503 to rotate. The large spur gear 503 drives the gear 1 502 to rotate and then drives the screw 1 509 to move on the surface of the U-shaped frame 501 toward the inside of the U-shaped frame 501, so that the screw 1 509 is always in contact with the surface of the moving rod 505. At the same time, the moving rod 505 moves on the threaded portion of the semi-threaded rod 811. At the same time, the gear 1 502 rotates while sliding on the surface of the large spur gear 503, so as not to affect the rotation of the screw 1 509 As the moving rod 505 continues to rotate toward the position of the impeller 200, the V-shaped abutment 507 will abut against the impeller 200 and push the impeller 200 laterally, so that the impeller 200 and the cone block 300 are tightly pressed. It should be noted that because the outer support rod 801 and the impeller 200 are in a tight state, in order to reduce the friction, the moving lubricating oil can be applied to the surface of the middle cavity of the impeller 200 to reduce the friction, and the continuous tight pressing will not affect the stability of the connection between the outer support rod 801 and the impeller 200.

[0075] When the V-shaped butt 507 is pressed against the impeller 200, as the moving rod 505 continues to move, one end of the V-shaped butt 507 will move inside the fixing sleeve 506 and squeeze the spring 1 511, thereby providing a buffer to avoid damage to the surface of the impeller 200 due to excessive pressure.

[0076] The screw rod 509 can provide support when the moving rod 505 is subjected to force, thereby preventing the moving rod 505 from deforming too much and affecting the tight fixation of the impeller 200.

[0077] The large spur gears 503 described in the present application are all provided with a shaft in the middle thereof. Since the installation and connection relationship of the gears is an existing and mature technology, it will not be described in detail.

[0078] The implementation principle of an impeller dynamic balance test device in the embodiment of the present application is:

[0079] The inspector first sleeves the support mechanism 600 on the surface of the core shaft 100 , and then sleeves the impeller 200 on the outside of the support mechanism 600 and makes one end of the impeller 200 abut against the cone block 300 .

[0080] Subsequently, the user rotates the transmission rod 701 through a tool and drives the worm wheel 704 to rotate through the worm 703, thereby driving the gear four 807 to rotate and driving the outer ring gear 604 to rotate. The outer ring gear 604 can drive the gear four 807 of several support assemblies 800 to rotate synchronously, thereby making several inner support rods 804 and several outer support rods 801 move synchronously and radially, thereby fixing the annular shell 601 on the core shaft 100, and supporting and fixing the impeller 200 through several outer support rods 801. At the same time, several semi-threaded rods 811 synchronously drive the moving rod 505 to move, thereby driving the V-shaped head 507 to move through the fixing sleeve 506 and cooperating with the cone block 300 to clamp and fix the impeller 200.

[0081] Subsequently, the driving device drives the core shaft 100 to rotate and then uses an external balancing test device to test the balance of the impeller 200.

[0082] The above are only optional embodiments of the present disclosure and are not intended to limit the present disclosure. For those skilled in the art, the present disclosure may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present disclosure shall be included in the protection scope of the present disclosure.

Claims

1. An impeller dynamic balancing test device, comprising a core shaft (100), and an impeller (200) sleeved outside the core shaft (100), characterized in that: One end of the core shaft (100) is fixedly provided with a cone block (300) for abutting and fixing the impeller (200); It also includes a support assembly (800) which is equally arranged in a surrounding manner within the support mechanism (600) and is used to support the impeller (200); one side of the support assembly (800) contacts the surface of the core shaft (100) and supports the impeller; and a tightening mechanism (500) is arranged on the outer side of the support mechanism (600) and is used to tighten the impeller (200) laterally. A driving assembly (700) for driving the supporting assembly (800) to move and achieve support is disposed on one side of the supporting mechanism (600); the driving assembly (700) is disposed between two supporting assemblies (800); the driving assembly (700) comprises a gear (705) rotatably disposed on the inner wall of the annular shell (601) and meshing with the outer gear ring (604); A counterweight block (400) for balancing the total mass of the support assembly (800) is fixedly disposed in the support mechanism (600) at a position opposite to the support assembly (800), so as to balance the center of gravity of the support mechanism (600), the plurality of support assemblies (800) and the drive assembly (700); The support assembly (800) comprises a semi-threaded rod (811) rotatably mounted on the inner wall of the annular shell (601); the lower half of the semi-threaded rod (811) is respectively sleeved and fixedly mounted with a second bevel gear (812) and a fourth gear (807) meshing with the outer gear ring (604) from top to bottom on the smooth surface; a connecting shaft (816) rotatably mounted with the inner wall of the annular shell (601) is arranged between the fourth gear (807) and the third gear (705); a seesaw plate (805) is sleeved and fixedly mounted on the middle part of the connecting shaft (816); a bevel gear (806) meshing with the second bevel gear (812) is sleeved and fixedly mounted on the middle upper part of the connecting shaft (816); the inner annular wall and the outer ring of the annular shell (601) are sleeved and fixedly mounted with the first bevel gear (806) meshing with the second bevel gear (812); The annular wall is equally divided and surrounded by a plurality of inner through holes (606) and a plurality of outer through holes (605), each of the inner through holes (606) and each of the outer through holes (605) are staggered, an inner support rod (804) is movably inserted into each of the inner through holes (606), and an outer support rod (801) is movably penetrated into each of the outer through holes (605), and side strips (810) are fixedly provided on both sides of each of the inner support rods (804) located inside the annular shell (601), and a built-in spring (809) for connection and reset is fixedly provided between a side of each of the side strips (810) facing the inner annular wall of the annular shell (601) and the inner annular wall of the annular shell (601); An inner fixing sleeve (803) is slidably sleeved on the surface of one end of each inner support rod (804) away from the side strip (810), and longitudinal sliding grooves (814) for guiding and limiting the inner support rod (804) are provided at both ends of the inner cavity of the inner fixing sleeve (803), and an arc-shaped stop block (802) for contacting with the surface of the core shaft (100) for fixation is fixed at one end of each inner fixing sleeve (803), and two symmetrically arranged springs (815) are fixed between the bottom of the inner cavity of the inner fixing sleeve (803) and the end surface of the inner support rod (804), and the extension lines of the arc surfaces of several arc-shaped stop blocks (802) can be spliced ​​into a circle; External springs (808) for connection and reset are fixedly arranged between the two ends of the outer side of the outer support rod (801) and the outer ring wall surface of the ring shell (601), and rollers (813) that are in contact with the surface of the seesaw (805) are rotatably arranged in the grooves facing the outer support rod (801) and the inner support rod (804); In a normal state, the rollers (813) of the outer support rod (801) and the inner support rod (804) are located on the surface of the seesaw (805) at the position of the connecting shaft (816); The support mechanism (600) comprises an annular shell (601), the outer surface of the annular shell (601) is equally divided and surrounded by a plurality of outer through holes (605) for sliding of the outer support rod (801), the inner surface of the annular shell (601) is equally divided and surrounded by a plurality of inner through holes (606) for sliding of the inner support rod (804), the counterweight block (400) is fixedly arranged on the inner wall of the annular shell (601), the middle surface of the inner cavity of the annular shell (601) is rotatably provided with an outer gear ring (604), the middle surface of the inner cavity of the annular shell (601) is fixedly provided with a fixing ring (603) for abutting and limiting the outer gear ring (604), and a cover plate (602) is fixedly arranged at the opening on one side of the annular shell (601); Gear 3 (705) in the driving assembly (700) drives the outer gear ring (604) to rotate, and the outer gear ring (604) drives gear 4 (807) of the plurality of supporting assemblies (800) to rotate, and then drives helical gear 2 (812) to rotate through the semi-threaded rod (811), and helical gear 2 (812) drives helical gear 1 (806) to rotate, and then drives the seesaw (805) to rotate through the connecting shaft (816); When the seesaw (805) rotates, it drives the inner support rod (804) and the outer support rod (801) to move synchronously in opposite directions in the form of a lever principle. The movement of the inner support rod (804) will squeeze the internal spring (809) and the second spring (815). Under the reaction force of the second spring (815), the arc-shaped stop block (802) and the surface of the core shaft (100) will be abutted and fixed through the internal fixing sleeve (803). At the same time, the outer support rod (801) moves outward to stretch the external spring (808) so that the end of the outer support rod (801) gradually abuts against the inside of the middle cavity of the impeller (200) and achieves abutment, thereby supporting the impeller (200) so that the transverse axis of the impeller (200) coincides with the axis of the core shaft (100) and the annular shell (601).

2. The impeller dynamic balance test device according to claim 1, characterized in that: A worm wheel (704) coaxially fixed to the gear three (705) is fixedly provided on one side of the gear three (705); a worm (703) fixedly connected to one end of a transmission rod (701) is meshed with one side of the worm wheel (704); a fixing seat (702) movably penetrated by the transmission rod (701) is fixedly provided on the inner wall of the annular shell (601); one end of the transmission rod (701) away from the worm (703) movably penetrates the annular shell (601) and its end extends to the outside.

3. The impeller dynamic balance test device according to claim 1, characterized in that: The tightening mechanism (500) comprises a U-shaped frame (501) fixedly mounted on the surface of the cover plate (602) and movably penetrated by a semi-threaded rod (811); the threaded portion of the semi-threaded rod (811) is located in an inner cavity of the U-shaped frame (501); a moving rod (505) threadedly connected to the threaded portion of the semi-threaded rod (811) is slidably disposed in the inner cavity of the U-shaped frame (501); the upper end of the U-shaped frame (501) is away from one end of the semi-threaded rod (811). The thread is provided with a screw rod 1 (509) in contact with the surface of the moving rod (505); the end of the semi-threaded rod (811) located on one side of the U-shaped frame (501) is sleeved and fixedly provided with a gear 2 (504); the side of the screw rod 1 (509) away from the U-shaped frame (501) is sleeved and fixedly provided with a gear 1 (502); and the upper end of the U-shaped frame (501) is rotatably provided with a large spur gear (503) meshing with the gear 2 (504) and the gear 1 (502).

4. The impeller dynamic balance test device according to claim 3, characterized in that: A fixed sleeve (506) is fixedly provided at the end of the moving rod (505) away from the second gear (504), and limiting grooves (510) communicating with the inner cavity of the fixed sleeve (506) are provided on both sides of the surface of the fixed sleeve (506), and a V-shaped abutment (507) is slidably provided in the inner cavity of the fixed sleeve (506), and a spring 1 (511) is fixedly provided between one end of the V-shaped abutment (507) located in the inner cavity of the fixed sleeve (506) and the bottom of the inner cavity of the fixed sleeve (506), and limiting sliders (508) sliding in the limiting grooves (510) are fixedly provided on both sides of one end of the V-shaped abutment (507) located in the inner cavity of the fixed sleeve (506), and the V-shaped abutment (507) faces one side of the cone block (300).

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