Impeller dynamic balancing support jig

Abstract

This utility model discloses an impeller dynamic balancing support fixture, relating to the field of impeller dynamic balancing testing technology. It includes a drive assembly, with a rotating shaft at the output end of the drive assembly. A testing structure is located outside the rotating shaft. A sleeve is located at one end of the rotating shaft. Several clamping frames are arranged in a ring at equal intervals inside the sleeve. Each clamping frame has a rack at one end, and each rack extends out of the sleeve. Washers are provided on the outer surface of the sleeve at the bottom end of each rack. A driven gear is meshed with one side of each rack, and a driving gear is located at the middle of the top of the driven gear. This utility model, through a series of structures, allows one fixture to adapt to impeller bushings of different diameters, eliminating the need for a dedicated tooling shaft for each impeller, saving manufacturing costs, improving clamping efficiency, and shortening the overall dynamic balancing testing time.

Description

Technical Field

[0001] This utility model relates to the field of impeller dynamic balancing testing technology, specifically to an impeller dynamic balancing support fixture. Background Technology

[0002] As a core working component of fluid machinery such as centrifugal fans, pumps, and compressors, the impeller's dynamic performance directly determines the overall operating efficiency, stability, and lifespan of the equipment. During actual manufacturing, various factors such as uneven material density, casting defects, machining errors, assembly deviations, and asymmetrical geometric design can cause the impeller's mass distribution to be less than perfectly uniform, meaning its center of gravity may deviate from the axis of rotation to some extent. Therefore, before installing the impeller into the main equipment, it must undergo rigorous dynamic balancing.

[0003] Impeller dynamic balancing tests commonly employ a long shaft connection scheme. This scheme mounts the impeller on a slender process shaft, and the drive head of the dynamic balancing machine rotates the long shaft and the impeller together. For this purpose, a matching positioning sleeve needs to be specially designed and manufactured for each type of impeller. This not only results in high fixture costs, but also requires frequent replacement of the entire tooling shaft when switching product models, leading to long adjustment and preparation times and affecting testing efficiency. Utility Model Content

[0004] The purpose of this invention is to provide a dynamic balancing support fixture for impellers to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a dynamic balancing support fixture for an impeller, comprising a drive assembly, a rotating shaft at the output end of the drive assembly, a detection structure on the outside of the rotating shaft, a sleeve at one end of the rotating shaft, a plurality of clamping frames arranged equidistantly in a ring inside the sleeve, a rack at one end of each of the clamping frames, a rack extending out of the sleeve, a washer ring on the outer surface of the sleeve at the bottom end of each rack, a driven gear meshing with one side of each rack, a driving gear at the middle position of the top of the driven gear, and a gear ring meshing with the outer surfaces of the driving gears.

[0006] Preferably, the bottom of the drive assembly is provided with a base, and the top of the base is slidably connected to two auxiliary support frames. The rotating shaft passes through the two auxiliary support frames. The base serves as a basic platform, providing a stable installation foundation. The entire device is firmly fixed to the workbench through the anchor bolt holes to prevent displacement due to vibration during testing. When supporting a heavy impeller, the middle of the rotating shaft will deflect and vibrate. The auxiliary support frames are equipped with support rollers to support the rotating shaft, enhance system rigidity, prevent the rotating shaft from bending, and ensure rotational stability. The sliding connection design allows the distance between the two support frames to be flexibly adjusted according to the weight of the impeller on the rotating shaft, always keeping the support point in the optimal position to accommodate different types of rotors.

[0007] Preferably, the top end of the toothed ring is provided with a ratchet ring, the top end of the ratchet ring is provided with an adjusting ring, and the outer surface of the adjusting ring is provided with a positioning ring. The positioning ring is fixedly installed on the outer surface of the sleeve, and the adjusting ring is rotatably connected to the bottom of the positioning ring. The ratchet ring is positioned to cooperate with the pawl in the following claims to form a one-way locking mechanism, allowing the adjusting ring to rotate and adjust in the clamping direction, preventing it from loosening in the opposite direction, ensuring the clamping force, and the positioning ring limits the ratchet ring through the adjusting ring, so that the ratchet ring can only rotate and will not deviate.

[0008] Preferably, a long groove is provided through the middle of the rack, and several protrusions are provided at the top of the pad ring corresponding to the long groove. A support plate is provided at the top of any one of the protrusions, and a pawl is provided at the top of the support plate. A positioning ring extends from the top of the pawl, and an adjustment knob is provided at the extended end of the positioning ring. The long groove and the protrusions on the pad ring cooperate to limit the rack and prevent the rack from deflecting during movement. The support plate serves as a guide for the pawl. The locking structure of the pawl consists of two mutually hinged plate-like components, and a torsion spring is provided at the hinge position. Under the action of torque, the pawl is inserted into the groove of the ratchet ring toward the tip of the ratchet ring. When the adjustment ring rotates in the clamping direction, the pawl will jump over the ratchet teeth. When attempting to rotate in the opposite direction, the pawl will abut against the ratchet teeth, achieving one-way locking. This allows the commonly used component that works with the ratchet to be released when the rotor needs to be released. The operator can move the pawl away from the ratchet ring by turning the adjustment knob, thereby releasing the lock and allowing the adjustment ring to rotate in the opposite direction.

[0009] Preferably, the top of the support plate has a slot, the bottom of the pawl extends into the slot, and a return spring is connected between one side of the extended end of the pawl and the inner wall of the slot. The return spring always applies a pushing force toward the ratchet ring to ensure that the pawl is locked in the slot. When rotating in the clamping direction, after the operation adjustment knob is released to unlock, the spring force can ensure that the pawl automatically returns to the working position.

[0010] Preferably, the outer surfaces of the toothed ring and the ratchet ring are connected to a rotating housing, and a positioning ring extends from the outside of the rotating housing, which facilitates the application of force during operation.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] This impeller dynamic balancing support fixture uses a driven gear to drive a rack for synchronous radial adjustment, in conjunction with a ratchet ring and pawl one-way locking mechanism. Multiple clamping frames are arranged in a ring inside the sleeve. Each clamping frame meshes with a driven gear via a rack, and the driven gear meshes with a common gear ring via a coaxial driving gear. When the rotating adjustment ring drives the gear ring, all clamping frames move synchronously, thus firmly gripping or releasing the impeller bushing. The ratchet ring and pawl work together to achieve one-way locking. During high-speed rotation testing, the clamping force does not decrease due to vibration. This allows one fixture to accommodate impeller bushings of different diameters, eliminating the need for a dedicated tooling shaft for each impeller, saving manufacturing costs, improving clamping efficiency, and shortening the overall dynamic balancing test time. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0014] Figure 2 This is a cross-sectional schematic diagram of the headgear structure of this utility model;

[0015] Figure 3 This is a schematic diagram of the clamping frame structure of this utility model;

[0016] Figure 4 For the present utility model Figure 3 Enlarged schematic diagram of the structure at point A in the middle.

[0017] In the diagram: 1. Drive assembly; 2. Detection structure; 3. Sleeve; 4. Base; 5. Auxiliary support frame; 6. Positioning ring; 7. Rotating housing; 8. Washer ring; 9. Clamping frame; 10. Rack; 11. Adjusting ring; 12. Ratchet ring; 13. Gear ring; 14. Driven gear; 15. Drive gear; 16. Support plate; 17. Adjusting knob; 18. Pawl; 19. Rotating shaft. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0020] like Figures 1 to 4 As shown, the impeller dynamic balancing support fixture in this embodiment includes a drive assembly 1, which serves as the power source for the fixture. The drive assembly 1 contains a motor and a reducer, providing stable rotational power to drive the impeller rotor to the speed required for dynamic balancing testing. A rotating shaft 19 is provided at the output end of the drive assembly 1, serving as the power output shaft and transmitting torque and rotational motion to the end sleeve 3 and the clamped impeller rotor. A detection structure 2 is provided outside the rotating shaft 19, integrating a vibration sensor and an encoder to monitor the vibration signal, phase, and speed of the rotating shaft in real time during rotation. The data is transmitted to the dynamic balancing analysis system to calculate the rotor's imbalance and position. A sleeve 3 is provided at one end of the rotating shaft 19, serving as an interface for directly clamping the impeller rotor. Several clamping frames 9 are arranged in a ring at equal intervals inside the sleeve 3. These clamping frames constitute... The adjustable gripper mechanism has a flexible pad at the centripetal end of the gripper 9 to protect the rotor surface and provide sufficient friction. Each end of several grippers 9 is equipped with a rack 10, which can convert rotational motion into linear motion. Each rack 10 extends into a sleeve 3, and the outer surface of the sleeve 3 at the bottom of the rack 10 is equipped with a washer ring 8, which provides sliding support and limit for the rack 10, ensuring that all racks 10 remain stable during linear motion. One side of each rack 10 is meshed with a driven gear 14, and a driving gear 15 is located at the middle of the top of the driven gear 14. The driving gear 15 transmits motion to the driven gear 14. The outer surfaces of several driving gears 15 are meshed with a gear ring 13, and several driving gears 14 mesh with a gear ring 13, so that the rotation of the gear ring 13 can synchronously drive the rotation of the driving gear 14.

[0021] Specifically, the bottom of the drive assembly 1 is provided with a base 4, and the top of the base 4 is slidably connected to two auxiliary support frames 5. The rotating shaft 19 passes through the two auxiliary support frames 5. The base 4 serves as a basic platform, providing a stable installation foundation and firmly fixing the entire device to the workbench through the anchor bolt holes to prevent displacement due to vibration during testing. When supporting a heavy impeller, the middle of the rotating shaft 19 will deflect and vibrate. The auxiliary support frames 5 are equipped with support rollers to support the rotating shaft 19, enhance the rigidity of the system, prevent the rotating shaft 19 from bending, and ensure rotational stability. The sliding connection design allows the distance between the two support frames to be flexibly adjusted according to the weight of the impeller on the rotating shaft 19, always setting the support point in the optimal position to adapt to different models of rotors.

[0022] Furthermore, a ratchet ring 12 is provided at the top of the toothed ring 13, and an adjusting ring 11 is provided at the top of the ratchet ring 12. A positioning ring 6 is provided on the outer surface of the adjusting ring 11. The positioning ring 6 is fixedly installed on the outer surface of the sleeve 3. The adjusting ring 11 is rotatably connected to the bottom of the positioning ring 6. The ratchet ring 12 is positioned to cooperate with the pawl 18 in the following claims to form a one-way locking mechanism, allowing the adjusting ring 11 to rotate and adjust in the clamping direction, preventing it from loosening in the opposite direction, and ensuring the clamping force. The positioning ring 6 limits the ratchet ring 12 through the adjusting ring 11, so that the ratchet ring 12 can only rotate and will not deviate.

[0023] Furthermore, a long groove is provided through the middle of the rack 10. Several protrusions are provided at the top of the washer 8 corresponding to the long groove. A support plate 16 is provided at the top of any one of the protrusions, and a pawl 18 is provided at the top of the support plate 16. A positioning ring 6 extends from the top of the pawl 18, and an adjusting knob 17 is provided at the extended end of the positioning ring 6. The long groove cooperates with the protrusions on the washer 8 to limit the rack 10 and prevent it from deflecting during movement. The support plate 16 serves as a guide for the pawl 18, and the locking structure of the pawl 18 has two... It consists of two hinged plate-like components, with a torsion spring at the hinge position. Under the action of torque, the pawl 18 is inserted into the groove of the ratchet ring 12 towards the tip of the ratchet ring 12. When the adjusting ring 11 rotates in the clamping direction, the pawl 18 will jump over the ratchet teeth. When attempting to rotate in the opposite direction, the pawl 18 will press against the ratchet teeth to achieve one-way locking. This allows the commonly used component that works with the ratchet to be released when the rotor needs to be released. The operator can move the pawl 18 away from the ratchet ring 12 by turning the adjusting knob 17, thereby releasing the lock and allowing the adjusting ring 11 to rotate in the opposite direction.

[0024] Furthermore, the top of the support plate 16 is provided with a slot, and the bottom of the pawl 18 extends into the slot. A return spring is connected between one side of the extended end of the pawl 18 and the inner wall of the slot. The return spring always applies a pushing force toward the ratchet ring 12 to the pawl 18 to ensure that the pawl 18 is embedded in the slot and locked. When rotating in the clamping direction, after the operation adjustment knob 17 is released to unlock, the spring force can ensure that the pawl 18 automatically returns to the working position.

[0025] Furthermore, the outer surfaces of the toothed ring 13 and the ratchet ring 12 are connected to a rotating housing 7, and a positioning ring 6 extends from the outside of the rotating housing 7, which facilitates the application of force during operation.

[0026] The method of use in this embodiment is as follows: Before using the impeller dynamic balancing support fixture, by turning the adjusting knob 17, the pawl 18 is displaced from the ratchet ring 12, thereby releasing the lock and allowing the adjusting ring 11 to rotate in the reverse direction. Then, the outer casing 7 is rotated in the reverse direction, which drives the driving gear 15 and the driven gear 14 through the adjusting ring 11 to drive all the racks 10 to retract synchronously, so that the clamping frame 9 opens and the inner diameter of the sleeve 3 is at its maximum. Then, the shaft sleeve of the impeller is inserted into the sleeve 3. Then, the outer casing 7 is rotated in the forward direction, which drives the adjusting ring 11 to rotate. The pawl 18 is engaged in the tooth groove of the ratchet ring 12 to prevent reverse rotation. The rotational force is transmitted to all the racks 10 through the tooth ring 13, the driving gear 15, and the driven gear 14. The drive clamping frame 9 extends towards the center of the sleeve 3, evenly clamping the impeller's bushing. When the impeller cannot be rotated by hand and there is no obvious shaking, stop rotating the adjusting ring 11. The ratchet mechanism has automatically locked to prevent the clamping force from loosening. Finally, the drive assembly 1 drives the impeller to rotate through the rotating shaft 19. The sensor in the detection structure 2 starts to work, monitoring vibration and phase signals in real time. When the equipment reaches a stable measurement speed, the dynamic balancing machine will automatically measure and display the magnitude and phase angle of the impeller imbalance. After the balancing operation is completed, turn the adjusting knob 17 to disengage the pawl 18 from the ratchet ring 12, releasing the one-way lock. Then, rotate the outer casing 7 in the opposite direction to loosen the impeller's bushing with the clamping frame 9, and the impeller can be removed.

[0027] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A dynamic balancing support fixture for an impeller, comprising a drive assembly (1), characterized in that: The output end of the drive assembly (1) is provided with a rotating shaft (19), and a detection structure (2) is provided on the outside of the rotating shaft (19). One end of the rotating shaft (19) is provided with a sleeve (3). Several clamping frames (9) are arranged in a ring at equal intervals inside the sleeve (3). One end of each of the clamping frames (9) is provided with a rack (10). Each of the racks (10) extends out of the sleeve (3). A washer ring (8) is provided on the outer surface of the sleeve (3) at the bottom of the racks (10). A driven gear (14) is meshed with one side of each rack (10). A driving gear (15) is provided at the middle position of the top of the driven gear (14). A gear ring (13) is meshed with the outer surface of each driving gear (15).

2. The impeller dynamic balancing support fixture according to claim 1, characterized in that: The bottom of the drive assembly (1) is provided with a base (4), and the top of the base (4) is slidably connected to two auxiliary support frames (5), and the rotating shaft (19) passes through the two auxiliary support frames (5).

3. The impeller dynamic balancing support fixture according to claim 1, characterized in that: The top of the toothed ring (13) is provided with a ratchet ring (12), the top of the ratchet ring (12) is provided with an adjusting ring (11), the outer surface of the adjusting ring (11) is provided with a positioning ring (6), the positioning ring (6) is fixedly installed on the outer surface of the sleeve (3), and the adjusting ring (11) is rotatably connected to the bottom of the positioning ring (6).

4. The impeller dynamic balancing support fixture according to claim 1, characterized in that: A long groove is provided through the middle position of the rack (10). Several protrusions are provided at the top of the pad ring (8) and the long groove. A support plate (16) is provided at the top of any one of the protrusions. A pawl (18) is provided at the top of the support plate (16). A positioning ring (6) extends from the top of the pawl (18). An adjustment knob (17) is provided at the extended end of the positioning ring (6).

5. The impeller dynamic balancing support fixture according to claim 4, characterized in that: The top of the support plate (16) is provided with a slot, the bottom of the pawl (18) extends into the slot, and a reset spring is connected between one side of the extended end of the pawl (18) and the inner wall of the slot.

6. The impeller dynamic balancing support fixture according to claim 3, characterized in that: The outer surfaces of the toothed ring (13) and the ratchet ring (12) are connected to a rotating housing (7).

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