A multi-channel mechanical acceleration switch

Abstract

A multi-channel mechanical acceleration switch, the acceleration switch is arranged on the centrifugal rotating part, and the axial direction is consistent with the radial direction of the centrifugal rotating part; it specifically includes a casing, a stationary electrode plate, a sliding body and a spring, and the casing is a circle Cylindrical or square cylindrical structure, the outer radius seat and the inner radius seat in the shell form a T-shaped chute, and at least one wiring hole is opened on the shell; the static electrode plate of the insulator is fixed on the end surface of the outer radius seat, and its surface There are multiple sets of conductive electrodes; the sliding body is mainly composed of T-shaped screws, sliding electrode plates and spring sleeves combined together, and multiple sets of conductive electrodes are arranged in the area where the sliding electrode plates of the insulator are radially exposed to the outer edge of the spring sleeve; The spring is axially arranged in the chute. Under the action of the spring, the axial position of the sliding electrode plate is kept at a distance from the stationary electrode plate. During the centrifugal acceleration process, the spring is compressed by the sliding body that slides axially outward, so that the sliding electrode plate and the stationary electrode plate The corresponding matching conductive electrodes of the plates are contacted and connected.

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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