Throttling device vibration response characteristic testing device and method

Abstract

The invention discloses a throttling device vibration response characteristic testing device and method. The device comprises a laser range finder, an electric proportional valve, a gas-oriented electromagnetic valve, an X-Y two-dimensional translation table, a limiting assembly, a high-precision marble platform, an industrial personal computer and a display screen. A throttling device is placed on the high-precision marble platform and is limited by the limiting assembly; the gas-oriented electromagnetic valve is turned off; the X-Y two-dimensional translation table is adjusted, so that the laser beam of the laser range finder falls on to-be-measured points; the electric proportional valve outputs corresponding gas source pressure; after the laser range finder stably performs measurement for 2 seconds, the gas-oriented electromagnetic valve is turned on; the laser range finder performs measurement continuously for 5 seconds and then terminates measurement; and the vibration response characteristic data of each of the to-be-measured points are sequentially measured and recorded. The testing method has the advantages of simplicity and high precision.

Description

technical field [0001] The invention relates to the field of throttle vibration testing, in particular to a testing device and method for the vibration response characteristics of a throttle. Background technique [0002] In existing devices, gas static pressure lubrication technology is usually used for linear or rotary motion. In my country, the overall restrictor technology is often used in the aspect of gas static pressure lubrication, that is, the throttle hole is arranged on the overall inner surface of the containing part (shaft sleeve or guide rail frame) of the ultra-precision kinematic pair to form a restrictor, and the gas flows from The orifice flows out, forming a layer of lubricating air film between the kinematic pairs. The kinematic pair can realize frictionless translational sliding through this lubricating air film. [0003] When the frequency of the external excitation (such as the size of the air source) is close to the natural frequency of the restricto...

AI Technical Summary

Problems solved by technology

However, the structure of the restrictor is relatively complicated, and its natural frequency cannot be accurately calculated. At present, there is no test device and method dedicated to the natural frequency of the restrictor.

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