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An internal excitation automatic balancing device for a propeller

An automatic balancing and propeller technology, which is applied in propellers, rotating propellers, transportation and packaging, etc., can solve the problems of limited balance capacity, heavy weight, and large size of automatic balance, and achieve increased balance capacity, counterweight capacity, and increased The effect of balance

Active Publication Date: 2022-03-25
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] In order to overcome the existing problems of large size, heavy weight, and limited balancing ability of the existing external excitation automatic balance, the present invention designs an internal balance that can be installed on the propeller shaft by means of an electromagnetically driven copper coil built in and a counterweight outside. The excitation automatic balancing device is used to realize the real-time suppression of unbalanced vibration. The system has a large balancing ability, a stable magnetic driving ability and a lightweight integrated structure design

Method used

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  • An internal excitation automatic balancing device for a propeller
  • An internal excitation automatic balancing device for a propeller
  • An internal excitation automatic balancing device for a propeller

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Such as figure 1 , figure 2 , image 3 As shown, the automatic balancing device of the present invention is an integrated structure, and the device can be assembled independently first, and then assembled to the propeller.

[0043] Moving ring installation sequence:

[0044] S1, combine figure 1 and figure 2 As shown, the permanent magnets are alternately installed on the counterweight plate a14 and the counterweight plate b17 according to the reverse order of magnetism. In this example, 60 magnets are selected, and the specific number of magnets should be selected according to the calculated relationship between the self-locking force and the driving force. Then the counterweight a3 and the counterweight b27 are fixed on the counterweight disc a14 and the counterweight disc b17 by bolts, and the positioning magnets are installed on the counterweight disc a14 and the counterweight disc b17;

[0045] S2. Install the counterweight plate a14 and the counterweight p...

Embodiment 2

[0060] Such as Figure 4 As shown, the difference between this embodiment and the first embodiment is that the assembled automatic balancing device is fixed to the end of the propeller hub through the support plate, but not installed inside the hub. In this embodiment, the dynamic balance can be performed on the propeller system with limited inner space of the hub.

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Abstract

The invention discloses an internal excitation automatic balancing device for propellers. The internal excitation automatic balancing device is designed to be installed at the propeller shaft, which can realize online suppression of propeller unbalanced vibration. The internal excitation automatic balancing device is a ring structure, which mainly includes two parts: a static ring and a moving ring. The static ring includes an excitation coil and a counterweight plate positioning Hall sensor; the moving ring includes two counterweight plates inlaid with permanent magnets and counterweights. When there is no external magnetic field, the position self-locking is realized through the side magnetic plate; ring connection. When the coil is energized, the weight plate can generate step rotation to compensate for imbalance. The present invention can design the installation structure according to the actual requirements of the propeller, and is respectively applicable to different installation methods and different balancing ability requirements. The invention has advantages in the weight of the excitation coil, the size of the balance ability, the convenience of installation and the like.

Description

technical field [0001] The invention belongs to the technical field of automatic balancing of rotating machines, and is especially suitable for automatic balancing of propellers, and real-time on-line vibration suppression. Background technique [0002] Propellers rely on blades rotating in the air or water to generate power. In the current general aviation and marine transportation fields, propeller power devices have been widely used for their good economy and high propulsion efficiency, such as propeller aircraft and ships. Thrusters etc. The propeller is a high-speed rotating part. Due to manufacturing and assembly errors, the center of mass of the propeller will inevitably deviate after installation, or the center of mass deviation caused by the mass change of the blade during flight will cause the propeller to rotate at a high speed. Balance vibration. In actual use, the propeller vibration problem caused by mass imbalance is more prominent, causing structural fatigu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B64C11/00B63H1/15B63H1/28
CPCB63H1/15B63H1/28B64C11/008
Inventor 陈立芳李兆举周博
Owner BEIJING UNIV OF CHEM TECH
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