A dynamic balancing test device and method for a Roots blower rotor

Abstract

The present invention belongs to the technical field of dynamic balancing test, and in particular to a dynamic balancing test device and method for a Roots blower rotor. The existing dynamic balancing test device for a blower rotor has a poor measurement effect on the dynamic balancing test of a Roots blower rotor. Since the cross section of the Roots blower rotor is relatively wide, the position and size of the balancing weight applied by the test device after the measurement are relatively vague, resulting in a poor measurement effect. The following scheme is now proposed, including a base plate, and two symmetrical upright frames are fixedly connected to the upper side of the base plate. The dynamic balancing test device and method for a Roots blower rotor disclosed in the present invention can enable the device to accurately perform all-round mapping of unbalanced points on the rotor according to the rotation trajectory of the rotor when performing a dynamic balancing test on the rotor, thereby effectively and specifically locating the unbalanced points on the rotor with a longer cross section, and improving the accuracy of the dynamic balancing test of the rotor by the device.

Description

Technical Field

[0001] The invention relates to the technical field of dynamic balancing test, and in particular to a dynamic balancing test device and method for a Roots blower rotor. Background Art

[0002] The method of balancing that can only determine the position of the unbalanced weight of the rotor and the position and size of the balancing weight to be added when the rotor is rotating is called dynamic balancing. Dynamic balancing can not only eliminate the force couple of dynamic imbalance, but also eliminate the centrifugal force of static imbalance. Therefore, it can be used to balance various cylindrical rotors, such as the rotor of centrifugal compressors and the rotor of large motors.

[0003] The existing fan rotor dynamic balancing test device has poor measurement effect on the dynamic balancing test of Roots blower rotor. Since the cross-section of the Roots blower rotor is wide, the test device is vague in determining the position and size of the balancing weight after the measurement, resulting in poor test measurement effect. Summary of the invention

[0004] The invention discloses a dynamic balancing test device and method for a Roots blower rotor, aiming to solve the technical problem that the existing test device in the background technology has a poor effect in determining the position and size of the balancing weight applied to the Roots blower rotor.

[0005] The present invention provides a dynamic balancing test device for a Roots blower rotor, comprising a base plate, wherein the upper side of the base plate is fixedly connected to two symmetrical vertical frames, the two vertical frames are provided with the same shaft rod, the rotor body is provided outside the shaft rod, and two symmetrical fixed plates are provided outside the shaft rod, a multi-angle measurement module is provided on the fixed plate, an infrared torque meter is provided on the multi-angle measurement module, and the infrared torque meter is located above the rotor body, the multi-angle measurement module comprises two symmetrical outer rings, the inner walls of the two outer rings are respectively fixedly connected to the outsides of the two fixed plates, the outer sides of the outer rings are provided with sliding grooves, the sliding grooves are slidably connected with mounting plates, the two mounting plates are slidably connected with movable plates on the opposite sides, the two movable plates are movably connected with the same screw rod, and a moving part is provided on the outside of the screw rod, the bottom of the moving part is fixedly connected to the upper side of the infrared torque meter, the upper side of the base plate is fixedly connected to a support frame, the upper side of the support frame is fixedly connected to a DC motor, a fixed module is provided on the side of the DC motor close to the output end, and an end of the shaft rod close to the DC motor is located in the fixed module.

[0006] By providing a fixing plate, a shaft, a rotor body, a support frame, a DC motor, a multi-angle measurement module, a fixing module, and an infrared torque meter, the device utilizes the multi-angle measurement module to enable the device to accurately perform all-round mapping of the unbalanced points on the rotor according to the rotation trajectory of the rotor when performing a dynamic balancing test on the rotor, thereby effectively and specifically locating the unbalanced points on the rotor with a longer cross-section, thereby improving the accuracy of the device's dynamic balancing test on the rotor.

[0007] In a preferred solution, the outside of the outer ring is fixedly connected with a rack 1, the mounting plates are provided with circular holes, the circular holes are fixedly connected with motor 1, the output end of motor 1 is connected with gears through couplings, the gears on the same side are respectively meshed with rack 1 on the same side, and the outside of one of the movable plates is fixedly connected with motor 2, the output end of motor 2 is connected to one side of the screw rod through a coupling; the opposite sides of the two mounting plates are fixedly connected with notches, the notches are located below the movable plates, the movable plates and the notches are provided with apertures, the same threaded rod is arranged in the apertures, and the outside of the threaded rod is fixedly connected with An annular sheet is connected, and an annular groove is opened at the bottom of the movable plate. The outside of the annular sheet on the same side is slidably connected to the inner wall of the annular groove, the outside of the movable plate is fixedly connected to a fixing strip, and the outside of the fixing strip is slidably connected to a restraining ring, which is located on the outside of the threaded rod, and a gear ring 2 is arranged on the outside of the threaded rod, and the bottom of the gear ring 2 is movably connected to the outside of the movable plate; the inner wall of the restraining ring is fixedly connected to a rack 2, and the rack 2 on the same side is clamped with the gear ring 2, and a spring 1 is fixedly connected to the side of the sliding groove away from the threaded rod, and the end of the spring 1 away from the fixing strip is fixedly connected to the outside of the movable plate on the same side, and the threaded rod The outside of the rod is provided with a knob, and the bottom of the knob is fixedly connected to the upper side of the second gear ring on the same side; the opposite side of the two mounting plates is fixedly connected to the same constraint plate, and a notch is provided on the constraint plate, and the outside of the infrared moment meter is slidably connected to the inner wall of the notch; the opposite side of the two fixed plates is provided with four sliding grooves equidistantly distributed around the circumference, and clamps are slidably connected in the sliding grooves, and the opposite side of the four clamps on the same side is provided with grooves, and a plurality of equidistantly distributed rollers are provided in the grooves, and the outside of the rollers are fitted with the outside of the shaft rod, and the side of the clamp away from the fixed plate is fixedly connected with a short shaft, and the two fixed plates are relatively close. One side of the pair is movably connected with a rotating frame; the rotating frame is provided with four curved grooves equidistantly distributed around the circumference, the inner walls of the four curved grooves on the same side are respectively slidably connected to the outside of the four short shafts, the outside of the rotating frame is fixedly connected with a gear ring 1, the outside of the gear ring 1 is provided with a fixed shaft, the fixed shaft is fixedly connected to the side opposite to the stand, the outside of the fixed shaft is movably connected with a clamping piece, the clamping piece is clamped with the gear ring 1 on the same side, and the outside of the fixed shaft is surrounded by a torsion spring, one end of the torsion spring is fixedly connected to the outside of the fixed shaft, and the other end is fixedly connected to the outside of the clamping piece, and the side of the clamping piece away from the stand is fixedly connected with a shift rod.

[0008] By providing a multi-angle measurement module, the multi-angle measurement module enables the device to perform measurements at multiple angles when the rotor rotates. The data obtained through multiple measurements can be verified with each other to ensure the accuracy of the measurement results, so that personnel can accurately eliminate the unbalanced force couple on the rotor and improve the effect of experimental measurements.

[0009] In a preferred embodiment, the fixing module includes a rectangular groove, which is opened on the upper side of the base plate and located on the side of the stand away from the DC motor. A support frame is slidably connected in the rectangular groove, and a spring 2 is fixedly connected to the side of the support frame close to the stand, and the side of the spring 2 away from the support frame is fixedly connected to the outside of the stand, and an insertion frame is fixedly connected to the upper side of the support frame; the inner wall of the insertion frame is slidably connected to the end of the shaft rod away from the DC motor, and the output end of the DC motor is connected to a bevel ring through a coupling, a threaded groove is opened on the outside of the bevel ring, and a rotating ring is arranged on the outside of the bevel ring; the inner wall of the rotating ring is rotatably connected to the threaded groove through an external thread, a plurality of strip grooves equidistantly distributed circumferentially are opened on the bevel ring, and a plurality of rubber pads equidistantly distributed circumferentially are fixedly connected to the inner wall of the bevel ring, and the rubber pads are both in contact with the side opposite to the shaft rod.

[0010] By providing a fixing module, the fixing module can enable the device to improve the fixing effect of the rotor body, so that the rotor body rotates at the same speed as the DC motor, reducing the low speed of the rotor body caused by poor fixing effect, which makes the dynamic balancing measurement effect not obvious.

[0011] A dynamic balancing test method for a Roots blower rotor, using the dynamic balancing test device for a Roots blower rotor as described above, comprises the following steps:

[0012] Step 1: Before performing a rotor dynamic balancing test, use a fixing module to place and fix the rotor body to be tested for dynamic balancing in the device, so that the fixing module connects the shaft on the rotor body to the output end of the DC motor;

[0013] Step 2: Start the dynamic balancing test, start the DC motor, use the multi-angle measurement module to drive the infrared torque meter in the device to measure the rotating cross-section of the rotating rotor body, adjust the angle for multiple re-measurements, and finally mark and record the unbalanced points on the rotor.

[0014] From the above, it can be seen that the dynamic balancing test device for a Roots blower rotor provided by the present invention has the function of enabling the device to accurately perform all-round mapping of the unbalanced points on the rotor according to the rotation trajectory of the rotor when performing a dynamic balancing test on the rotor, thereby effectively and specifically locating the unbalanced points on the rotor with a longer cross-section, thereby improving the accuracy of the dynamic balancing test of the rotor by the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The overall structural schematic diagram of a dynamic balancing test device for a Roots blower rotor proposed by the present invention;

[0016] Figure 2 A side structural schematic diagram of a dynamic balancing test device for a Roots blower rotor proposed by the present invention;

[0017] Figure 3 A schematic diagram of the structure of a multi-angle measurement module of a dynamic balancing test device for a Roots blower rotor proposed by the present invention;

[0018] Figure 4 A schematic diagram of the structure of a fixing plate of a dynamic balancing test device for a Roots blower rotor proposed by the present invention;

[0019] Figure 5 A schematic diagram of the structure of a mounting plate of a dynamic balancing test device for a Roots blower rotor proposed by the present invention;

[0020] Figure 6 A schematic diagram of the movable plate structure of a dynamic balancing test device for a Roots blower rotor proposed by the present invention;

[0021] Figure 7 A schematic diagram of the structure of a fixing module of a dynamic balancing test device for a Roots blower rotor proposed by the present invention;

[0022] Figure 8 The present invention provides a schematic diagram of the structure of a bevel ring of a dynamic balancing test device for a Roots blower rotor.

[0023] In the figure: 1, base plate; 2, stand; 3, fixed plate; 4, shaft; 5, rotor body; 6, support frame; 7, DC motor; 8, multi-angle measurement module; 801, rotating frame; 802, outer ring; 803, sliding groove; 804, clamping block; 805, roller; 806, short shaft; 807, curved groove; 808, gear ring 1; 809, fixed shaft; 810, positioning piece; 811, lever; 812, torsion spring; 813, sliding groove; 814, mounting plate; 815, rack 1; 816, motor 1; 817, gear; 818, movable plate; 81 9. Screw rod; 820. Motor 2; 821. Moving part; 822. Constraint plate; 823. Notch; 824. Threaded rod; 825. Annular groove; 826. Annular plate; 827. Gear ring 2; 828. Restraining ring; 829. Rack 2; 830. Fixing strip; 831. Spring 1; 832. Knob; 9. Fixing module; 901. Rectangular groove; 902. Support bracket; 903. Spring 2; 904. Insert frame; 905. Bevel ring; 906. Threaded groove; 907. Rotating ring; 908. Rubber pad; 909. Strip groove; 10. Infrared moment meter. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present invention will be described clearly and completely 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.

[0025] A dynamic balancing test device for a Roots blower rotor disclosed in the present invention is mainly used in scenarios where the existing test device has a poor effect in determining the position and size of the balancing weight applied to the Roots blower rotor.

[0026] Reference Figure 1-8A dynamic balancing test device for a Roots blower rotor comprises a base plate 1, two symmetrical vertical frames 2 are connected to the upper side of the base plate 1 by bolts, the two vertical frames 2 are provided with a same shaft 4, a rotor body 5 is provided outside the shaft 4, and two symmetrical fixing plates 3 are provided outside the shaft 4, a multi-angle measuring module 8 is provided on the fixing plate 3, an infrared moment meter 10 is provided on the multi-angle measuring module 8, and the infrared moment meter 10 is located above the rotor body 5, the multi-angle measuring module 8 comprises two symmetrical outer rings 802, the inner walls of the two outer rings 802 are respectively connected to the outside of the two fixing plates 3 by bolts, and the outer rings 802 The outside of each is provided with a slide groove 813, and the inside of each slide groove 813 is slidably connected with a mounting plate 814, and the opposite sides of the two mounting plates 814 are slidably connected with a movable plate 818, and the two movable plates 818 are rotatably connected to the same screw rod 819 through a bearing, and a moving part 821 is arranged on the outside of the screw rod 819, and the bottom of the moving part 821 is connected to the upper side of the infrared moment meter 10 by bolts, and the upper side of the base plate 1 is connected to a support frame 6 by bolts, and the upper side of the support frame 6 is connected to a DC motor 7 by bolts, and a fixed module 9 is arranged on the side of the DC motor 7 close to the output end, and the end of the shaft rod 4 close to the DC motor 7 is located in the fixed module 9.

[0027] Specifically, before performing a rotor dynamic balancing test, a fixing module 9 is used to place and fix the rotor body 5 to be subjected to a dynamic balancing test in the device, so that the fixing module 9 connects the shaft 4 on the rotor body 5 to the output end of the DC motor 7, and the dynamic balancing test is started. The DC motor 7 is started, and the multi-angle measurement module 8 is used to drive the infrared torque meter 10 in the device to perform cross-sectional measurement on the rotating cross-section of the rotating rotor body 5, and the angle is adjusted for multiple re-measurements, and finally the unbalanced points on the rotor are marked and recorded; the device utilizes the multi-angle measurement module 8 to enable the device to accurately perform all-round mapping of the unbalanced points on the rotor according to the rotation trajectory of the rotor when performing a dynamic balancing test on the rotor, thereby effectively and specifically locating the unbalanced points on the rotor with a longer cross-section, thereby improving the accuracy of the device in the dynamic balancing test of the rotor.

[0028] Reference Figure 3 , Figure 4 , Figure 5 and Figure 6In a preferred embodiment, the outer portion of the outer ring 802 is connected to a rack 815 by bolts, and a circular hole is provided on the mounting plate 814, and a motor 816 is connected to the circular hole by bolts. The output end of the motor 816 is connected to a gear 817 by a coupling, and the gears 817 located on the same side are respectively engaged with the rack 815 on the same side, and the outer portion of one of the movable plates 818 is connected to a motor 820 by bolts, and the output end of the motor 820 is connected to one side of the screw rod 819 by a coupling; the opposite sides of the two mounting plates 814 are connected to notches 823 by bolts, and the notches 823 are located at the movable plate 818. Below the movable plate 818, the movable plate 818 and the slot 823 are both provided with holes, the same threaded rod 824 is arranged in the hole, and the outside of the threaded rod 824 is connected to an annular piece 826 by bolts, the bottom of the movable plate 818 is provided with an annular groove 825, the outside of the annular piece 826 on the same side is slidably connected to the inner wall of the annular groove 825, the outside of the movable plate 818 is connected to a fixing strip 830 by bolts, the outside of the fixing strip 830 is slidably connected to a restraining ring 828, the restraining ring 828 is located on the outside of the threaded rod 824, the outside of the threaded rod 824 is provided with a toothed ring 827, the bottom of the toothed ring 827 The inner wall of the restraining ring 828 is connected with the rack 829 by bolts, and the rack 829 on the same side is clamped with the gear ring 827. The side of the sliding groove 803 away from the threaded rod 824 is connected with the spring 831 by bolts, and the end of the spring 831 away from the fixed bar 830 is connected with the outside of the movable plate 818 on the same side by bolts, and the outside of the threaded rod 824 is provided with a knob 832, and the bottom of the knob 832 is connected with the upper side of the gear ring 827 on the same side by bolts. The opposite sides of the two mounting plates 814 are connected with the same restraining plate 814 by bolts. 22. A notch 823 is provided on the constraint plate 822, and the outside of the infrared moment meter 10 is slidably connected to the inner wall of the notch 823; four circumferentially equidistantly distributed sliding grooves 803 are provided on the opposite sides of the two fixed plates 3, and a clamping block 804 is slidably connected in the sliding groove 803. The opposite sides of the four clamping blocks 804 on the same side are provided with grooves, and a plurality of equidistantly distributed rollers 805 are arranged in the grooves, and the outsides of the rollers 805 are all in contact with the outside of the shaft 4, and the side of the clamping block 804 away from the fixed plate 3 is connected to the short shaft 806 by bolts, and the opposite sides of the two fixed plates 3 are rotatably connected to the rotating frame 801 by bearings;The rotating frame 801 is provided with four curved grooves 807 which are equally spaced around the circumference. The inner walls of the four curved grooves 807 on the same side are respectively slidably connected to the outside of the four short shafts 806. The outside of the rotating frame 801 is connected with a toothed ring 808 by bolts. The outside of the toothed ring 808 is provided with a fixed shaft 809. The side of the fixed shaft 809 opposite to the stand 2 is connected by bolts. The outside of the fixed shaft 809 is rotatably connected with a clamping piece 810 through a bearing. The clamping piece 810 is clamped with the toothed ring 808 on the same side. The outside of the fixed shaft 809 is surrounded by a torsion spring 812. One end of the torsion spring 812 is connected to the outside of the fixed shaft 809 by bolts, and the other end is connected to the outside of the clamping piece 810 by bolts. The side of the clamping piece 810 away from the stand 2 is connected with a lever 811 by bolts. ;

[0029] Specifically, after the shaft 4 is inserted into the fixed plate 3, the rotating frame 801 is rotated. The curved groove 807 on the rotating frame 801 pushes the clamping block 804 connected to the short shaft 806 to move inward on the sliding groove 803 during the rotation, thereby clamping the two ends of the shaft 4. The roller 805 on the clamping block 804 ensures that the rotor body 5 connected to the shaft 4 can rotate smoothly. After the rotating frame 801 rotates, the locking member 810 outside the rotating frame 801 is locked with the rotating frame 801 under the torsion of the torsion spring 812. The gear ring 808 connected to the first gear 801 is clamped, so that the rotating frame 801 can keep the shaft 4 in position when the rotor body 5 rotates, and the restraining ring 828 is grasped and pulled outward, so that the restraining ring 828 overcomes the pulling force of the spring 1 831 and moves outward, so that the rack 829 on the restraining ring 828 is released from the clamping connection with the gear ring 827, and the knob 832 is turned, and the knob 832 drives the gear ring 827 to rotate, so that the threaded rod 824 rotates and the annular piece 826 connected to the threaded rod 824 pushes the movable plate 818 upward The movable plate 818 moves. Through the above adjustment, the screw rod 819 on the movable plate 818 can be parallel to the shaft rod 4. After the adjustment is parallel, the restraining ring 828 is loosened. Under the pulling force of the spring 1 831, the rack 2 829 and the gear ring 2 827 are re-engaged, and the movable plate 818 no longer moves. When the measurement starts, the DC motor 7 is started, and the DC motor 7 drives the rotor body 5 on the shaft rod 4 to rotate, and the motor 2 820 is started, and the motor 2 820 drives the screw rod 819 to rotate, so that the moving part 821 on the screw rod 819 drives the infrared measuring The torque meter 10 moves back and forth on the screw rod 819, and the infrared torque meter 10 will perform transverse contour mapping of the rotating rotor body 5 during movement. After mapping, start the motor 816, and the motor 816 drives the gear 817 meshing with the rack 815 to rotate, so that the infrared torque meter 10 rotates and moves around the shaft 4 as the axis. Start the motor 2 820, and perform the test measurement again. After repeated measurements after changing the angle for many times, the changes in the longitudinal section contour generated when the rotor body 5 rotates are marked and recorded.

[0030] In specific application scenarios, the multi-angle measurement module 8 is mainly suitable for the multi-angle measurement link in the multi-angle measurement process, that is, the multi-angle measurement module 8 can enable the device to perform measurements at multiple angles when the rotor rotates, and the data obtained by multiple measurements are mutually verified to ensure the accuracy of the measurement results, so that personnel can accurately eliminate the unbalanced force couple on the rotor and improve the effect of experimental measurements.

[0031] Reference Figure 7 and Figure 8 In a preferred embodiment, the fixing module 9 includes a rectangular groove 901, which is opened on the upper side of the base plate 1 and is located on the side of the stand 2 away from the DC motor 7. A support bracket 902 is slidably connected in the rectangular groove 901. A spring 2 903 is connected to the side of the support bracket 902 close to the stand 2 by bolts. The side of the spring 2 903 away from the support bracket 902 is connected to the outside of the stand 2 by bolts, and an insertion frame 904 is connected to the upper side of the support bracket 902 by bolts; the inner wall of the insertion frame 904 is connected to the shaft 4 away from the DC motor 7. One end of the DC motor 7 is slidably connected, and the output end of the DC motor 7 is connected to a bevel ring 905 through a coupling, a thread groove 906 is provided on the outside of the bevel ring 905, and a rotating ring 907 is provided on the outside of the bevel ring 905; the inner wall of the rotating ring 907 is rotatably connected to the thread groove 906 through an external thread, a plurality of circumferentially equidistantly distributed strip grooves 909 are provided on the bevel ring 905, and a plurality of circumferentially equidistantly distributed rubber pads 908 are connected to the inner wall of the bevel ring 905 through bolts, and the rubber pads 908 are both in contact with the side opposite to the shaft 4.

[0032] Specifically, insert one end of the shaft rod 4 on the rotor body 5 into the insertion frame 904 and push it lightly, so that the support bracket 902 connected to the insertion frame 904 can overcome the pulling force of the second spring 903 and move outward along the rectangular groove 901, so that the other end of the shaft rod 4 can pass through the fixed plate 3 and align with the bevel ring 905 for insertion, and release the shaft rod 4. Under the pulling force of the second spring 903, the insertion frame 904 completely inserts the end of the shaft rod 4 close to the DC motor 7 into the bevel ring 905, and rotates the rotating ring 907. The inclined inner wall of the rotating ring 907 continuously moves to the end of the higher outer bevel of the bevel ring 905 during rotation, so that the rotating ring 907 pushes the bevel on the threaded groove 906 to continuously fit the rubber pad 908 to the surface of the shaft rod 4. After the rotating ring 907 is completely rotated to the highest end of the bevel ring 905, the rubber pad 908 will clamp the shaft rod 4.

[0033] In a specific application scenario, the fixing module 9 is mainly suitable for the fixing link in the fixing process, that is, the fixing module 9 can enable the device to improve the fixing effect on the rotor body 5, so that the rotor body 5 has the same speed as the DC motor 7 when rotating, thereby reducing the low speed of the rotor body 5 caused by poor fixing effect, which makes the dynamic balancing measurement effect not obvious.

[0034] A dynamic balancing test method for a Roots blower rotor, using the dynamic balancing test device for a Roots blower rotor as described above, comprises the following steps:

[0035] Step 1: Before conducting the rotor dynamic balancing test, the rotor body 5 to be subjected to the dynamic balancing test is placed in the device and fixed by using the fixing module 9, so that the fixing module 9 connects the shaft 4 on the rotor body 5 to the output end of the DC motor 7 (one end of the shaft 4 on the rotor body 5 is inserted into the insertion frame 904 and gently pushed, so that the support bracket 902 connected to the insertion frame 904 can overcome the pulling force of the spring 2 903 and move outward along the rectangular groove 901, so that the other end of the shaft 4 can pass through the fixing plate 3 and align with the bevel ring 905 for insertion). Insert, loosen the shaft 4, under the pulling force of the second spring 903, insert the end of the shaft 4 close to the DC motor 7 into the bevel ring 905 completely with the insertion frame 904, rotate the rotating ring 907, the inclined inner wall of the rotating ring 907 continuously moves to the end of the outer bevel of the bevel ring 905 with a higher bevel during rotation, so that the rotating ring 907 pushes the bevel on the thread groove 906 to continuously fit the rubber pad 908 to the surface of the shaft 4, after the rotating ring 907 is completely rotated to the highest end of the bevel ring 905, the rubber pad 908 will clamp and fix the shaft 4);

[0036] Step 2: Start the dynamic balancing test, start the DC motor 7, use the multi-angle measurement module 8 to drive the infrared torque meter 10 in the device to measure the rotating cross section of the rotating rotor body 5, and adjust the angle for multiple re-measurements, and finally mark and record the unbalanced points on the rotor (after the shaft 4 is inserted into the fixed plate 3, the rotating frame 801 is rotated, and the curved groove 807 on the rotating frame 801 pushes the clamping block 804 connected to the short shaft 806 to move inward on the sliding groove 803 during rotation, thereby clamping the two ends of the shaft 4, and the roller 805 on the clamping block 804 is To ensure that the rotor body 5 connected to the shaft 4 can rotate smoothly, after the rotating frame 801 rotates, the locking member 810 outside the rotating frame 801 clamps the toothed ring 808 connected to the rotating frame 801 under the torsion of the torsion spring 812, so that the rotating frame 801 can maintain the positioning of the shaft 4 when the rotor body 5 rotates, grab the restraining ring 828 and pull it outward, so that the restraining ring 828 overcomes the pulling force of the spring 1 831 and moves outward, so that the rack 2 829 on the restraining ring 828 is released from the clamping connection with the toothed ring 2 827, and the knob 832 is turned, and the knob 832 drives The gear ring 827 rotates, so that the threaded rod 824 rotates and the annular piece 826 connected to the threaded rod 824 pushes the movable plate 818 to move upward. Through the above adjustment, the screw rod 819 on the movable plate 818 can be parallel to the shaft rod 4. After the parallel adjustment, the restraining ring 828 is loosened. Under the pulling force of the spring 1 831, the rack 829 and the gear ring 827 are re-engaged, and the movable plate 818 no longer moves. At the beginning of the measurement, the DC motor 7 is started, and the DC motor 7 drives the rotor body 5 on the shaft rod 4 to rotate, and the motor 2 820 is started, and the motor 2 820 drives the screw rod 819 Rotate, so that the moving part 821 on the screw rod 819 drives the infrared torque meter 10 to move back and forth on the screw rod 819, and the infrared torque meter 10 will perform horizontal contour mapping of the rotating rotor body 5 during movement. After mapping, start the motor 816, and the motor 816 drives the gear 817 meshing with the rack 815 to rotate, so that the infrared torque meter 10 rotates around the shaft 4 as the axis. Start the motor 2 820 and perform the test measurement again. After repeated measurements after changing the angle for many times, the changes in the longitudinal section contour generated when the rotor body 5 rotates are marked and recorded).

[0037] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A dynamic balancing test device for a Roots blower rotor, comprising a base plate (1), characterized in that: Two symmetrical vertical frames (2) are fixedly connected to the upper side of the base plate (1), the two vertical frames (2) are provided with a same shaft (4), a rotor body (5) is provided outside the shaft (4), and two symmetrical fixed plates (3) are provided outside the shaft (4), a multi-angle measurement module (8) is provided on the fixed plate (3), an infrared moment meter (10) is provided on the multi-angle measurement module (8), and the infrared moment meter (10) is located above the rotor body (5), and the multi-angle measurement module (8) includes two symmetrical outer rings (802), the inner walls of the two outer rings (802) are respectively fixedly connected to the outside of the two fixed plates (3), and the outside of the outer rings (802) is provided with a sliding The groove (813) is provided with a mounting plate (814) in a sliding connection in the sliding groove (813); the two mounting plates (814) are both slidably connected to a movable plate (818) on opposite sides; the two movable plates (818) are movably connected to a same screw rod (819); a moving part (821) is provided outside the screw rod (819); the bottom of the moving part (821) is fixedly connected to the upper side of the infrared moment meter (10); the upper side of the base plate (1) is fixedly connected to a support frame (6); the upper side of the support frame (6) is fixedly connected to a DC motor (7); a fixing module (9) is provided on a side of the DC motor (7) close to an output end; and an end of the shaft rod (4) close to the DC motor (7) is located in the fixing module (9); The outer portion of the outer ring (802) is fixedly connected to a rack 1 (815), a circular hole is formed on the mounting plate (814), a motor 1 (816) is fixedly connected in the circular hole, the output end of the motor 1 (816) is connected to a gear (817) via a coupling, the gears (817) on the same side are respectively meshed with the rack 1 (815) on the same side, and the outer portion of one of the movable plates (818) is fixedly connected to a motor 2 (820), and the output end of the motor 2 (820) is connected to one side of the screw rod (819) via a coupling; The two mounting plates (814) are fixedly connected to the opposite sides with slots (823), the slots (823) are located below the movable plate (818), the movable plate (818) and the slots (823) are provided with holes, the same threaded rod (824) is arranged in the hole, and the outside of the threaded rod (824) is fixedly connected with an annular sheet (826), the bottom of the movable plate (818) is provided with an annular groove (825), and the annular sheet on the same side is provided with a screw thread (826). The outside of (826) is slidably connected to the inner wall of the annular groove (825), the outside of the movable plate (818) is fixedly connected to a fixing bar (830), the outside of the fixing bar (830) is slidably connected to a restraining ring (828), the restraining ring (828) is located outside the threaded rod (824), the outside of the threaded rod (824) is provided with a second gear ring (827), and the bottom of the second gear ring (827) is movably connected to the outside of the movable plate (818).

2. A dynamic balancing test device for a Roots blower rotor according to claim 1, characterized in that: The inner wall of the restraining ring (828) is fixedly connected to a second rack (829), and the second rack (829) on the same side is clamped with the second gear ring (827). The side of the sliding groove (803) away from the threaded rod (824) is fixedly connected to a first spring (831), and the end of the first spring (831) away from the fixed bar (830) is fixedly connected to the outside of the movable plate (818) on the same side. The outside of the threaded rod (824) is provided with a knob (832), and the bottom of the knob (832) is fixedly connected to the upper side of the second gear ring (827) on the same side. The opposite sides of the two mounting plates (814) are fixedly connected to the same restraining plate (822), and a notch (823) is provided on the restraining plate (822). The outside of the infrared moment meter (10) is slidably connected to the inner wall of the notch (823).

3. A dynamic balancing test device for a Roots blower rotor according to claim 2, characterized in that: Four circumferentially equidistantly distributed sliding grooves (803) are provided on opposite sides of the two fixed plates (3), and clamping blocks (804) are slidably connected in the sliding grooves (803). A groove is provided on opposite sides of the four clamping blocks (804) on the same side, and a plurality of equidistantly distributed rollers (805) are provided in the grooves. The outsides of the rollers (805) are in contact with the outsides of the shaft (4), and a short shaft (806) is fixedly connected to the side of the clamping blocks (804) away from the fixed plates (3). A rotating frame (801) is movably connected to the opposite sides of the two fixed plates (3).

4. A dynamic balancing test device for a Roots blower rotor according to claim 3, characterized in that: The rotating frame (801) is provided with four circumferentially equidistantly distributed curved grooves (807), the inner walls of the four curved grooves (807) on the same side are respectively slidably connected to the outside of the four short shafts (806), the outside of the rotating frame (801) is fixedly connected to a gear ring 1 (808), the outside of the gear ring 1 (808) is provided with a fixed shaft (809), the fixed shaft (809) is fixedly connected to the side opposite to the stand (2), and the fixed shaft ( The outside of the fixed shaft (809) is movably connected to a locking piece (810), the locking piece (810) is locked with a toothed ring (808) on the same side, and a torsion spring (812) is wrapped around the outside of the fixed shaft (809), one end of the torsion spring (812) is fixedly connected to the outside of the fixed shaft (809), and the other end is fixedly connected to the outside of the locking piece (810), and the side of the locking piece (810) away from the stand (2) is fixedly connected to a lever (811).

5. A dynamic balancing test device for a Roots blower rotor according to claim 4, characterized in that: The fixing module (9) comprises a rectangular groove (901), the rectangular groove (901) being opened on the upper side of the base plate (1) and being located on a side of the stand (2) away from the DC motor (7), a support frame (902) being slidably connected in the rectangular groove (901), a second spring (903) being fixedly connected on a side of the support frame (902) close to the stand (2), a side of the second spring (903) away from the support frame (902) being fixedly connected to the outside of the stand (2), and an insertion frame (904) being fixedly connected on an upper side of the support frame (902).

6. A dynamic balancing test device for a Roots blower rotor according to claim 5, characterized in that: The inner wall of the insertion frame (904) is slidably connected to an end of the shaft rod (4) away from the DC motor (7), and the output end of the DC motor (7) is connected to a bevel ring (905) via a coupling, a threaded groove (906) is provided on the outside of the bevel ring (905), and a rotating ring (907) is provided on the outside of the bevel ring (905).

7. A dynamic balancing test device for a Roots blower rotor according to claim 6, characterized in that: The inner wall of the rotating ring (907) is rotatably connected to the thread groove (906) via an external thread, a plurality of strip grooves (909) equidistantly distributed around the circumference are formed on the bevel ring (905), and a plurality of rubber pads (908) equidistantly distributed around the circumference are fixedly connected to the inner wall of the bevel ring (905), and the rubber pads (908) are in contact with the side opposite to the shaft (4).

8. A dynamic balancing test method for a Roots blower rotor, using a dynamic balancing test device for a Roots blower rotor as claimed in any one of claims 1 to 7, characterized in that: The steps include: Step 1: Before performing a rotor dynamic balancing test, a rotor body (5) to be subjected to a dynamic balancing test is placed in a device and fixed using a fixing module (9), so that the fixing module (9) connects the shaft (4) on the rotor body (5) to the output end of the DC motor (7); Step 2: Start the dynamic balancing test and measurement, start the DC motor (7), use the multi-angle measurement module (8) to drive the infrared torque meter (10) in the device to measure the rotating cross section of the rotating rotor body (5), adjust the angle and perform repeated measurements multiple times, and finally mark and record the unbalanced points on the rotor.

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