Elevator instantaneous safety gear test method and test device

Abstract

The invention discloses an elevator instantaneous type safety gear test method and a test apparatus thereof, the braking capability (allowed mass) of a safe gear is detected through a drop test, and the intensity of a gear body of the safety gear is further verified through a static pressure test. According to the method and the apparatus thereof, the drop test truly reflects the influence of the impact force and the system response time in the work process of the instantaneous type safety gear, and the drop test is also a reliable method for examining the intensity of the safety gear in the practical same condition of the instantaneous type safety gear. According to the method and the apparatus thereof, the static pressure test further verifies the intensity and the safety margin of the gear body of the safety gear through a safety factor or the maximum impact load, the test result is true and reliable, the problem of the method prescribed by the conventional standard is solved, and more scientific basis can be provided for product type test, forming and application of the instantaneous type safety gears.

Description

technical field [0001] The invention relates to the field of test methods and devices, in particular to a test method for an elevator instantaneous safety gear and a test device thereof. Background technique [0002] The safety gear is the safety protection device of the elevator. The elevator safety gear device is under the control of the speed limiter. A safety device that stops the car in an emergency and clamps it on the guide rail. [0003] Instantaneous safety gear can be divided into two types: wedge type and roller type according to the structure of the braking element. [0004] Instantaneous safety gear is a traction and forced drive elevator with a rated speed of less than 0.63m / s, hydraulic drive elevators, and other types of elevators (firefighter elevators, explosion-proof elevators, sundry elevators) when the car descends overspeed, or even the suspension system breaks An important safety device that makes the car stop on the guide rail when it fails. my cou...

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Problems solved by technology

[0009] 2. Determining the energy that the instantaneous safety gear can absorb depends on the integral area of ​​the force and displacement curve in the static pressure test of the safety gear, three calculation methods proposed in GB 7588-2003F 3.2.4.2, but the boundaries and types are not clear enough

[0020] The results of this comparison test mainly have the following differences: (1) In the case of similar test forces, the test strokes and absorbed energy have a large difference

(2) There are differences in the nature of the deformation. Three laboratories believe that the pliers are plastically deformed, and one thinks that the pliers are only elastically deformed.

[0022] 3. The current type test standard for instantaneous safety gear is based on the theory of impact energy absorption, without considering the impact of impact time. Obviously, the shorter the impact time, the greater the impact force

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