Speed limiter with electromagnet and built-in photoelectric encoder

Abstract

The invention provides a speed limiter with an electromagnet and a built-in photoelectric encoder, which solves the problems, such as that the action speed control is hysteretic, the electromagnet is easy to be destroyed, the braking is not reliable and the like, of the prior speed limiter. The speed limiter comprises left and right brackets with left and right supporting seats, a sheave shaft, atransmission disc, a braking wheel, a sheave, a photoelectric encoder and an electromagnet, technical points of the speed limiter are as follows: one end of the sheave shaft is coaxially connected tothe built-in photoelectric encoder; the braking wheel fixed on the sheave shaft directly is fixedly connected to the sheave; the odd number of bosses are circumferentially distributed at an end face edge of the braking disc disposed at one end of the sheave wheel; the electromagnet is axially and symmetrically fixed at two sides of the transmission disc in parallel; when the power supply of the electromagnet is interrupted, the contacts of the electromagnet extend out; whole or part of at least one contact enters the bosses of the braking wheel. The speed limiter of the invention is reasonable and compact in structure design, and exact, fast and reliable in braking control, so that the real-time monitoring of running speed of a lift is realized, and the braking effect and the safety and reliability during the running of the lift are improved obviously.

Description

technical field [0001] The invention relates to a safety protection device for controlling the downward or upward or bidirectional running of an elevator, in particular to a speed governor with an electromagnet and a built-in photoelectric encoder for real-time monitoring of the running speed of the elevator. Background technique [0002] As the main safety component that controls the running speed of the elevator, the speed governor's reliability and safety are the main factors related to the safe operation of the elevator. The design principle of the existing speed limiter is: when the elevator runs downward at overspeed, the electric switch of the speed limiter moves quickly to disconnect the electrical control circuit; The safety gear lifting mechanism connected with the safety gear wire rope pulls the safety gear, so that the safety gear tightly hugs the guide rail, realizes the rapid braking and stopping of the elevator, and avoids accidents. Its main disadvantage is:...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a speed limiter with electromagnet and built-in photoelectric encoder, which solves the existing speed limiter's action speed control hysteresis, the external installation of the encoder occupies a large axial dimension, and the electromagnet is easy to operate. Its structural design is reasonable and compact, and the braking control is accurate, fast and reliable, which realizes real-time monitoring of the running speed of the elevator, and significantly improves the braking effect and the safety and reliability of the elevator operation.

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