Multichannel mechanical acceleration switch

Abstract

The invention provides a multichannel mechanical acceleration switch. The acceleration switch is arranged on a centrifugal rotating part, and the axial direction is consistent with the radial direction of the centrifugal rotating part. The multichannel mechanical acceleration switch concretely comprises a shell, a stationary electrode plate, a slide body and a spring. The shell has a cylindrical or square tubular structure. A T-shaped chute formed by an external radius base and an internal radius base is formed in the shell. The shell is provided with at least one wiring hole. The stationary electrode plate of the insulator is fixed on the end surface of the external radius base, and the surface is provided with multiple sets of conductive electrodes. The slide body is mainly composed of aT-shaped screw, a slide electrode plate and a spring sleeve which are combined together. Multiple sets of conductive electrodes are arranged in the area, which is radially exposed out of the edge ofthe spring sleeve, of the slide electrode plate of the insulator. The spring is axially arranged in the chute. The axial position of the slide electrode plate maintains to be spaced from the stationary electrode plate under the effect of the spring. The spring is compressed by the slide body which axially slides to the outside in the centrifugal acceleration process so that the correspondingly matched conductive electrodes of the slide electrode plate and the stationary electrode plate are enabled to be contacted and conducted.

Description

technical field [0001] The invention relates to an acceleration switch, in particular to a multi-channel mechanical acceleration switch, which is especially suitable for power control of a telemetry transmitter in a mechanical vibration test (such as a turbine blade vibration test). Background technique [0002] The mechanical vibration test is usually realized by means of remote measurement, and the vibration test of the turbine blade is taken as an example to illustrate in detail. [0003] Turbine blades need to bear the action of dynamic exciting force during operation, multi-frequency exciting force will cause the dynamic stress of the blade, high cycle fatigue damage caused by excessive dynamic stress is the main failure type of blade failure. For this reason, before the turbine blades are put into operation, vibration and stress tests should be carried out to make necessary design and structural improvements based on the test results, and sometimes real machine tests a...

AI Technical Summary

Problems solved by technology

Due to the limited installation space on the rotating shaft, the capacity of the high-energy battery installed on the rotating shaft is relatively limited. Generally, it can only maintain the effective operation of the telemetry transmitter for dozens of hours, which makes the power consumption of the high-energy battery precious.

[0006] However, in the vibration test process of the above-mentioned turbine blades, based on the installation position of the telemetry transmitter and the battery on the shaft inside the turbine and the particularity of the vibration test environment, the high-energy battery has been activated before the turbine is running. Power supply, but before the formal vibration test work—that is, before the turbine is in normal operation, the pre-commissioning of various systems must be completed, including the troubleshooting of various systems, etc. Usually the pre-commissioning takes a long time and it is difficult to control the early stage Debug cycle

That is to say, during the period from the start of the turbine to the completion of the preliminary commissioning, due to the lack of effective control technology for the specific power supply on the turbine shaft, the high-energy battery continues to provide useless power to the telemetry transmitter in the early stage , which will cause the high-energy battery to supply the useless power to the telemetry transmitter, resulting in the waste and consumption of the limited capacity of the high-energy battery, failing to "make the best use of everything" - that is, failing to effectively and fully use the limited battery capacity in formal On the "knife edge" of the test, it will affect the smooth development of the follow-up formal vibration test

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