Sensor type elastic washer capable of dynamically monitoring threaded connection pre-tightening force

Abstract

The invention discloses a sensor type elastic gasket for dynamically monitoring threaded connection pre-tightening force. The gasket can be deformed and comprises a gasket main body, two strain gauges, an integrated circuit board and a small supporting piece embedded in an elastic body, wherein the appearance of the gasket is similar to a saddle shape, however, the difference between the saddle-shaped elastic washer and a common saddle-shaped elastic washer is that four end planes are machined on two sides of the saddle shape, four arc surfaces are additionally machined on the upper surface and the lower surface of a concave position of the saddle shape, two lower concave surfaces of the four arc surfaces are pasted with the same two strain gauges and embedded with eight symmetrical small supports, two sides of the gasket are provided with grooves for placing the miniature integrated circuit board, and a lead groove is connected with the groove at one end. The washer is advantaged in that the anti-loosening bolt is high in practicability and sensitivity, the structure and the function are integrated due to the arrangement of the lead groove and the groove for containing the micro integrated circuit board, purposes of reducing cost, increasing efficiency and being widely used can be achieved on the premise that the bolt pre-tightening force and the anti-loosening purpose are monitored in real time, and the anti-loosening bolt has wide application prospects and is worthy of popularization; in addition, the gasket and a common saddle-shaped gasket are made of the same material, so the gasket can be used as an intelligent gasket for a long time.

Description

Technical field: [0001] The invention relates to a sensor-type elastic washer capable of dynamically monitoring the pretightening force of threaded connections, which belongs to the field of combination of mechanical engineering bolt connection technology and sensor technology. Background technique: [0002] Bolt connection is used in all walks of life and has the functions of strengthening connection and sealing. In most cases, when the bolt connection is subjected to collision and impact for a long time, the bolt will loosen or fail, and finally there will be major accidents such as separation and leakage of the connecting parts. Therefore, most bolts nowadays are connected by adding washers. When the washers are pressed, a rebound force is generated to increase the friction between the threads, so that the friction can effectively prevent the bolts from loosening. Starting from this point, technical researchers thought of adding sensors to monitor bolt looseness in the g...

AI Technical Summary

Problems solved by technology

Torque measurement method: when the bolt is tightened, there is a torque force, and when the bolt is loose, the torque changes, and the torque meter can be used to regularly detect the bolt connection, but because the torque meter is sensed on the power head, the detection is unstable, and measurement will occur Error, and the operator cannot monitor in real time; Strain sensor method: As mentioned above, strain gauges are added in the gasket to sense the change of the bolt pre-tightening force, but in the prior art, the structure in the gasket is too complicated. Too many strain gauges and complex external circuits lead to high manufacturing costs and cannot solve fundamental problems

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