Method for detecting and maintaining braking torque value of inertia brake of portal crane

Abstract

The invention discloses a method for detecting and maintaining a braking torque value of an inertia brake of a portal crane. The method comprises the following steps: (2) firstly improving a traditional digital-display torque wrench; (2) then establishing a detection-maintenance standard for the braking torque value of the inertia brake, namely respectively selecting each inertia brake in the portal crane, verifying actual braking torque of the inertia brake by utilizing a large-scale traction device, after repeatedly adjusting the braking torque of the inertia brake and keeping the braking torque in a braking critical state, measuring the braking torque value of the inertia brake at the moment by utilizing the improved digital-display torque wrench, and verifying whether the inertia brake can reliably brake by utilizing the large-scale traction device, wherein the braking torque value of the inertia brake is taken as a detection-maintenance standard value if the inertia brake can reliably brake; and (3) comparing detection data of the braking torque value of each inertia brake with the corresponding standard value in daily detection and maintenance, and adjusting according to situations. By utilizing the method, the normal maintenance workload of the inertia brake is reduced.

Description

technical field [0001] The invention relates to a detection and maintenance method for the braking torque value of the inertial brake of a door machine. Background technique [0002] The inertial brake is a purely mechanical braking device with reliable braking and few failures. As a braking and windproof safety device, inertial brakes have been widely used in the traveling mechanism of large-scale lifting equipment in industries such as ports and metallurgy. However, the braking torque of the inertial brake depends on the pretightening force of the spring (that is, the compression degree of the brake spring), and the braking torque required between the traveling mechanisms of large-scale lifting equipment is also due to the uneven distribution of self-weight Not the same, if the braking torque is adjusted too large or too small, it will not be able to meet the braking safety requirements of the site: 1) If the braking torque is adjusted too large, the brake will not open, ...

AI Technical Summary

Problems solved by technology

However, the braking torque of the inertial brake depends on the pretightening force of the spring (that is, the compression degree of the brake spring), and the braking torque required between the traveling mechanisms of large-scale lifting equipment is also due to the uneven distribution of self-weight Not the same, if the braking torque is adjusted too large or too small, it will not be able to meet the braking safety requirements of the site: 1) If the braking torque is adjusted too large, the brake will not open, the brake friction plate will wear abnormally, or when the vehicle is started or stopped. The impact is large, which affects the service life of the metal structure; 2) The braking torque is adjusted too small, and the brake cannot play the role of braking or wind protection

At the same time, since the braking torque value of the inertial brake is not quantified, if the maintenance is only performed according to the uniform spring length value provided by the manufacturer, the maintenance effect will vary greatly from person to person.

[0003] In order to verify the effectiveness of the inertial brake, it is generally used to tow large-scale lifting equipment through external large-scale traction devices (such as large loaders or tractors, etc.), and verify the inertial brake system by verifying whether the traveling wheels of the large-scale lifting equipment are rolling. The validity of the dynamic torque value, the traction test not only requires a lot of traction equipment, instruments, tools and personnel, the test process is relatively cumbersome, but also has a large amount of engineering and a long construction period (it takes at least 6 hours to test one device)

At the same time, due to limited conditions, it can only be tested once a year, and the long-term and real-time effectiveness of the brake cannot be guaranteed.