An outer rotor fan impeller dynamic balance test fixture

Abstract

The utility model relates to impeller detection technical field, concretely relates to a kind of outer rotor fan impeller dynamic balance test fixture, including detection support and fixed lock unit, fixed lock unit includes pivot, pull rod, connecting rod, compression plate, locking frame, limit frame, limit ring, detection component and driving assembly, when using, impeller is placed in the one end of pivot and passes through compression plate, rotates locking frame and pulls pull rod right displacement under the cooperation of limit frame, compression plate is flipped under the pulling of connecting rod at this time, until the side surface of compression plate and the end surface of impeller contact, limit ring is used to limit the transverse movement of pivot, reduce the occurrence of safety event, detection component is used for the dynamic balance monitoring of impeller, driving assembly is used to drive pivot rotation, impeller is fixed by such mode, it is convenient for staff operation and use, it is favorable to improve the efficiency of impeller dynamic balance detection, reduce the labor intensity of staff.

Description

Technical Field

[0001] This utility model relates to the field of impeller testing technology, and in particular to a dynamic balancing test fixture for an external rotor fan impeller. Background Technology

[0002] An external rotor fan impeller refers to a fan impeller whose impeller is mounted on the motor housing. Its characteristic is that the rotor is located outside the airflow channel and there is a clear gap between it and the stationary blade cylinder. During the assembly process, dynamic balancing testing is required. Existing devices can detect abnormalities after assembling the impeller and blades, but they cannot determine in time whether the problem lies in the impeller or the blades, making the detection difficult.

[0003] The prior art patent application with publication number CN214096487U discloses a dynamic balancing machine for a fan impeller. The base is equipped with a balancing bracket, which in turn has a balancing shaft bracket and a support beam. The support beam has a turntable, which has a dynamic balancing shaft. The dynamic balancing shaft has a fan impeller mounted on it and a drive shaft connector. A detection bracket is also included. A horizontal position transmitter A and a horizontal position transmitter B are respectively mounted on the upper and lower parts of the detection bracket. This method allows the fan impeller to be tested to be placed on the dynamic balancing shaft and monitored by a motor, solving the problem of difficult dynamic balancing testing of fan impellers and blades.

[0004] However, in the aforementioned existing technologies, the installation of the wind turbine impeller is relatively troublesome, which is not conducive to improving the efficiency of dynamic balance testing and increases the workload of testing personnel. Utility Model Content

[0005] The purpose of this utility model is to provide a dynamic balancing test fixture for external rotor fan impellers, which aims to solve the problems in the prior art where the installation of fan impellers is relatively troublesome, which is not conducive to improving the efficiency of dynamic balancing testing and increases the workload of testing personnel.

[0006] To achieve the above objectives, this utility model provides a dynamic balancing test fixture for an external rotor fan impeller, comprising a testing bracket and a fixing and locking unit. The fixing and locking unit includes a rotating shaft, a pull rod, a connecting rod, a pressure plate, a locking frame, a limiting frame, a limiting ring, a testing component, and a driving component. The fixing and locking unit is connected to the testing bracket. The testing bracket has a circular hole that rotatably engages with the rotating shaft. The pull rod is slidably connected to the rotating shaft and located on the outer side wall of the rotating shaft. The rotating shaft has a strip-shaped hole that rotatably engages with the pressure plate. The connecting rod is rotatably connected to both the pull rod and the pressure plate. The limiting frame is fixedly connected to the rotating shaft and located at one end of the rotating shaft. The pull rod has an external thread that threadedly engages with the locking frame. The limiting ring is fixedly connected to the rotating shaft and located on the outer side wall of the rotating shaft. The testing component and the driving component are both located on the outer side wall of the testing bracket.

[0007] The detection assembly includes a side plate, a fixing collar, and an acceleration sensor. The side plate is fixedly connected to the detection bracket and is located on one side of the detection bracket. The fixing collar is fixedly connected to the side plate and is located below the side plate. The fixing collar is rotatably engaged with the rotating shaft. The acceleration sensor is detachably connected to the fixing collar and is located on the inner sidewall of the fixing collar.

[0008] The detection assembly further includes connecting ribs, which are fixedly connected to the side plate and the detection bracket, respectively.

[0009] The drive assembly includes a drive wheel, a driven wheel, a three-way asynchronous motor, and a belt. The three-way asynchronous motor is fixedly connected to the detection bracket and located on one side of the detection bracket. The drive wheel is fixedly connected to the three-way asynchronous motor and located at the output end of the three-way asynchronous motor. The driven wheel is fixedly connected to the rotating shaft and located on the outer wall of the rotating shaft. The belt is sleeved on the outer walls of the drive wheel and the driven wheel.

[0010] The drive assembly further includes a protective cover, which is fixedly connected to the detection bracket and located on the outer side wall of the detection bracket.

[0011] This utility model discloses a dynamic balancing test fixture for an external rotor fan impeller. In use, the impeller is placed at one end of the rotating shaft and passes through the clamping plate. Rotating the locking bracket, in conjunction with the limiting bracket, pulls the pull rod to the right. At this time, the clamping plate flips under the pull of the connecting rod until the side of the clamping plate contacts the end face of the impeller. The limiting ring restricts the lateral movement of the rotating shaft, reducing the occurrence of safety incidents. The detection component is used for dynamic balancing monitoring of the impeller, and the drive component is used to drive the rotating shaft to rotate. This method of fixing the impeller facilitates operation and use by staff, improves the efficiency of impeller dynamic balancing testing, and reduces the labor intensity of staff. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0013] Figure 1 This is a schematic diagram of the structure of the external rotor fan impeller dynamic balancing test fixture of this utility model.

[0014] Figure 2 This is a right view of the external rotor fan impeller dynamic balancing test fixture of this utility model.

[0015] Figure 3 This is the utility model Figure 2 A sectional view along line AA.

[0016] Figure 4 This is the utility model Figure 3 Enlarged view of the local structure at point B.

[0017] 101-Detection bracket, 102-Rotating shaft, 103-Pull rod, 104-Connecting rod, 105-Pressure plate, 106-Locking bracket, 107-Limit bracket, 108-Limit ring, 109-Side plate, 110-Fixing collar, 111-Acceleration sensor, 112-Connecting rib, 113-Driving wheel, 114-Driven wheel, 115-Three-way asynchronous motor, 116-Belt, 117-Protective cover, 118-Round hole, 119-Strip hole, 120-External thread. Detailed Implementation

[0018] Please see Figures 1 to 4 ,in, Figure 1 This is a schematic diagram of the structure of the external rotor fan impeller dynamic balancing test fixture of this utility model. Figure 2 This is a right view of the external rotor fan impeller dynamic balancing test fixture of this utility model. Figure 3 This is the utility model Figure 2 AA-line sectional view, Figure 4 This is the utility model Figure 3 Enlarged view of the local structure at point B.

[0019] This utility model provides a dynamic balancing test fixture for an external rotor fan impeller, including a test bracket 101 and a fixing and locking unit. The fixing and locking unit includes a rotating shaft 102, a pull rod 103, a connecting rod 104, a pressure plate 105, a locking frame 106, a limiting frame 107, a limiting ring 108, a test component, and a drive component. The test component includes a side plate 109, a fixing collar 110, an acceleration sensor 111, and a connecting rib 112. The drive component includes a driving wheel 113, a driven wheel 114, a three-way asynchronous motor 115, a belt 116, and a protective cover 117. The test bracket 101 has a circular hole 118, the rotating shaft 102 has a strip hole 119, and the pull rod 103 has an external thread 120.

[0020] The fixing and locking unit is connected to the detection bracket 101; the detection bracket 101 has a circular hole 118, which is rotatably engaged with the rotating shaft 102; the pull rod 103 is slidably connected to the rotating shaft 102 and is located on the outer side wall of the rotating shaft 102; the rotating shaft 102 has a strip hole 119, which is rotatably engaged with the pressure plate 105; the connecting rod 104 is rotatably connected to the pull rod 103 and the pressure plate 105 respectively; the limiting frame 107 is fixedly connected to the rotating shaft 102 and is located at one end of the rotating shaft 102; the pull rod 103 has an external thread 120, which is threadedly engaged with the locking frame 106; the limiting ring 108 is fixedly connected to the rotating shaft 102 and is located on the outer side wall of the rotating shaft 102; the detection component is disposed on the outer side wall of the detection bracket 101; and the driving component is disposed on the outer side wall of the detection bracket 101.

[0021] In this embodiment, the impeller is placed at one end of the rotating shaft 102 and passes through the clamping plate 105. The locking bracket 106 is rotated and, in cooperation with the limiting bracket 107, pulls the pull rod 103 to the right. At this time, the clamping plate 105 is flipped under the pull of the connecting rod 104 until the side of the clamping plate 105 contacts the end face of the impeller. The limiting ring 108 is used to restrict the lateral movement of the rotating shaft 102 and reduce the occurrence of safety incidents. The detection component is used for dynamic balance monitoring of the impeller, and the drive component is used to drive the rotating shaft 102 to rotate. Fixing the impeller in this way makes it easy for operators to operate and use, improves the efficiency of impeller dynamic balance detection, and reduces the labor intensity of operators.

[0022] Furthermore, the side plate 109 is fixedly connected to the detection bracket 101 and is located on one side of the detection bracket 101. The fixing collar 110 is fixedly connected to the side plate 109 and is located below the side plate 109. The fixing collar 110 is rotatably engaged with the rotating shaft 102. The acceleration sensor 111 is detachably connected to the fixing collar 110 and is located on the inner sidewall of the fixing collar 110.

[0023] In this embodiment, the acceleration sensor 111 on the inner wall of the fixed collar 110 senses the inertial force generated by acceleration through the sensitive mass block, converts the mechanical vibration or acceleration signal into an electrical signal output, and extracts the vibration component with the same frequency as the impeller rotation speed through Fourier transform in the computer terminal system, calculates its amplitude and phase to determine the magnitude and location of the imbalance.

[0024] Furthermore, the connecting rib 112 is fixedly connected to the side plate 109 and the detection bracket 101 respectively.

[0025] In this embodiment, the connecting rib 112 is used to share the pressure borne by the side plate 109 and extend the service life of the side plate 109.

[0026] Furthermore, the three-way asynchronous motor 115 is fixedly connected to the detection bracket 101 and located on one side of the detection bracket 101; the driving wheel 113 is fixedly connected to the three-way asynchronous motor 115 and located at the output end of the three-way asynchronous motor 115; the driven wheel 114 is fixedly connected to the rotating shaft 102 and located on the outer side wall of the rotating shaft 102; and the belt 116 is sleeved on the outer side walls of the driving wheel 113 and the driven wheel 114.

[0027] In this embodiment, the three-way asynchronous motor 115 is started. Since the belt 116 is sleeved on the outer wall of the driving wheel 113 and the driven wheel 114, it drives the rotating shaft 102 to rotate, and the acceleration sensor 111 is used for detection.

[0028] Furthermore, the protective cover 117 is fixedly connected to the detection bracket 101 and is located on the outer side wall of the detection bracket 101.

[0029] In this embodiment, the protective cover 117 is used to protect the belt 116 and can also prevent direct contact between items, reducing the occurrence of safety incidents.

[0030] The above-disclosed embodiments are merely preferred embodiments of this application and should not be construed as limiting the scope of this application. Those skilled in the art will understand that all or part of the processes for implementing the above embodiments, and equivalent variations made in accordance with the claims of this application, still fall within the scope of this application.

Claims

1. A dynamic balancing test fixture for an external rotor fan impeller, comprising a testing bracket, characterized in that, It also includes a fixing and locking unit, which is connected to the detection bracket; The fixing and locking unit includes a rotating shaft, a pull rod, a connecting rod, a pressure plate, a locking frame, a limiting frame, a limiting ring, a detection component, and a driving component. The detection frame has a circular hole that rotatably engages with the rotating shaft. The pull rod is slidably connected to the rotating shaft and located on the outer side wall of the rotating shaft. The rotating shaft has a strip-shaped hole that rotatably engages with the pressure plate. The connecting rod is rotatably connected to both the pull rod and the pressure plate. The limiting frame is fixedly connected to the rotating shaft and located at one end of the rotating shaft. The pull rod has an external thread that threadedly engages with the locking frame. The limiting ring is fixedly connected to the rotating shaft and located on the outer side wall of the rotating shaft. The detection component is disposed on the outer side wall of the detection frame, and the driving component is disposed on the outer side wall of the detection frame.

2. The external rotor fan impeller dynamic balancing test fixture as described in claim 1, characterized in that, The detection assembly includes a side plate, a fixing collar, and an acceleration sensor. The side plate is fixedly connected to the detection bracket and is located on one side of the detection bracket. The fixing collar is fixedly connected to the side plate and is located below the side plate. The fixing collar is rotatably engaged with the rotating shaft. The acceleration sensor is detachably connected to the fixing collar and is located on the inner sidewall of the fixing collar.

3. The dynamic balancing test fixture for external rotor fan impellers as described in claim 2, characterized in that, The detection assembly also includes connecting ribs, which are fixedly connected to the side plate and the detection bracket respectively.

4. The external rotor fan impeller dynamic balancing test fixture as described in claim 3, characterized in that, The drive assembly includes a drive wheel, a driven wheel, a three-way asynchronous motor, and a belt. The three-way asynchronous motor is fixedly connected to the detection bracket and located on one side of the detection bracket. The drive wheel is fixedly connected to the three-way asynchronous motor and located at the output end of the three-way asynchronous motor. The driven wheel is fixedly connected to the rotating shaft and located on the outer side wall of the rotating shaft. The belt is sleeved on the outer side walls of the drive wheel and the driven wheel.

5. The external rotor fan impeller dynamic balancing test fixture as described in claim 4, characterized in that, The drive assembly also includes a protective cover, which is fixedly connected to the detection bracket and located on the outer side wall of the detection bracket.

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