Bolt axial force detection and automatic compensation device

Abstract

The invention discloses a bolt axial force detection and automatic compensation device which is connected between a bolt and a fixing piece through a central hole in the middle of the lower end and comprises a heating gasket carrying disc and an end cover which are connected in a matched mode. A heating resistance wire and a shape memory alloy gasket are connected in the upper end surface of the middle part of the lower end of the heating gasket carrying disc in a matched mode, and a film-type pressure sensor is attached and connected to the lower end surface of the middle part of the lower end of the heating gasket carrying disc. A square groove is formed in the upper end of the heating gasket carrying disc, and a pressure display device connected with the film-type pressure sensor is arranged in the square groove. The end cover is connected to the upper end face of the heating gasket carrying disc in a matched mode, and a pressure display screen is arranged at the position, corresponding to the pressure display device, of the upper end of the end cover. According to the bolt axial force detection and automatic compensation device, by utilizing the temperature change effect of the shape memory alloy gasket and adopting the detection and heating synergistic effect of the film-type pressure sensor and the heating resistance wire, clearance compensation is carried out in time when the bolt is found to be loosened, so that the loose bolt is automatically tightened to increase the axial force of the bolt, and the connection between the bolt and a fixed part is safer and firmer.

Description

technical field [0001] The invention relates to a compensation gasket between a bolt and a fixing part, in particular to a bolt axial force detection and automatic compensation device, which belongs to the technical field of bolt fastening. Background technique [0002] Due to the simple bolt processing, convenient use and disassembly, and low manufacturing cost, the bolt connection method has become the best choice for people to connect many fixing parts. In all walks of life, the bolt connection method often exists. [0003] However, when the fixing parts are vibrated, the connection mode of the bolts is easy to loosen, which has caused many safety hazards to some processing equipment and human safety. Therefore, it is particularly important to detect the tightness of the bolts and compensate in time when the equipment is running, so that problems can be found in time to avoid accidents. Contents of the invention [0004] The purpose of the present invention is to solve...

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that in the existing bolt connection method, when the fixing parts are easily loosened and cause safety accidents, it provides a bolt axial force detection and automatic compensation device, which is installed between the bolts and the fixing parts , using the temperature change effect of the shape memory alloy gasket and the detection and heating synergy of the thin film pressure sensor and the heating resistance wire, the gap compensation is performed in time when the bolt is found to be loose, so that the looser bolt is automatically tightened to increase its axial direction force, making the connection between the bolt and the fixture more secure and firm

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