Hydrodynamic test measurement bridge with high control precision

Abstract

A hydrodynamic test measurement bridge with high control precision comprises an alternating-current servo motor (1), a planet reducer (2), a servo electric cylinder (3), an electric cylinder holder (4), a lift seat (5), a beam connecting plate (6), a linear slider (7), a linear slide (8), a bridge connector (9), a connecting block (10), a central bridge (11), an instrument holding rail (12) and a length compensation wedge (13). The hydrodynamic test measurement bridge with high control precision has the advantages that a lifting system is small in size and simple to mount and demount, operation is flexible, control precision is high, repeated accuracy is high, a limit switch is integrated with the servo electric cylinder, reliability is increased, and the hydrodynamic test measurement bridge with high control precision is long in service life and simple to operate and maintain.

Description

technical field [0001] The invention relates to the field of hydrodynamic tests of ships, seaplanes, etc., in particular to a high-precision control hydrodynamic test measuring bridge. Background technique [0002] At present, in order to further improve the installation, use efficiency and automation of hydrodynamic tests, domestic hydrodynamic laboratories have successively adopted automatic lifting test measuring bridges to replace the original fixed measuring bridges. The method is to use four motors (two AC servo motors on each side of the central bridge) to drive the reducer to decelerate, drive the trapezoidal screw to rotate, and achieve the movement of the central bridge fixedly connected with the trapezoidal nut. Through use and later maintenance, it is found that there are the following deficiencies , mainly manifested in: [0003] 1. High installation accuracy requirements [0004] The lifting method of the existing measuring bridge is driven by two motors at t...

AI Technical Summary

Problems solved by technology

[0005] 2. Low lifting precision and low repeatability

[0006] Since the existing measuring bridge adopts the lifting form of the trapezoidal screw and the trapezoidal nut, considering the processing error and the gap between the trapezoidal screw and the trapezoidal nut, the lifting accuracy and repeatability of the lifting system are low

[0007] 3. The limit switch is installed externally, which is easy to be damaged and mistriggered

[0008] The limit switch of the existing measurement bridge is installed on the bridge connector. During the installation process of the test piece, the tester is easy to touch the limit switch, resulting in damage to the limit switch.

[0009] 4. Difficulty in post-maintenance

[0010] Due to the large number of lifting system components in the existing measuring bridge design, the workload in the disassembly and installation process in the later stage is very large, and the difficulty of later maintenance is increased due to the high requirements for installation accuracy

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