Method and device for measuring gradient of lost motion time of disc brake in real time
A real-time measurement and disc braking technology, applied in transportation, packaging, elevators, etc., can solve the problems of large error and low accuracy, and achieve the effect of convenient and simple, accurate data, and real-time online detection of idle time.
Active Publication Date: 2014-10-08
LUOYANG CITIC HIC AUTOMATION ENG +1
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Problems solved by technology
[0007]At present, the indirect method is generally used to measure the lost motion time of disc brakes, which cannot fully and accurately reflect the physical behavior characteristics of the lost motion time of the brakes, and the accuracy is relatively low. Low, large error, generally need additional hardware facilities
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Embodiment Construction
[0051] Embodiments of the present invention will be described below with reference to the accompanying drawings.
[0052] Such as figure 1 , 2 , 3, 4, and 5, because the disc brake of the hoist is released or closed under the control of the release / close signal of the brake control, when the brake is released, the brake is released, and the hoist operates and lifts normally. When the machine is hoisted to the wellhead and needs to be braked to stop, or in the process of hoisting, when an emergency occurs and an emergency brake is required to stop, under the action of the closing signal or emergency braking signal, the piston pushes the brake to press the brake disc to brake. Such as figure 1 shown. The time elapsed from the start of the brake movement to the contact with the brake disc is the lost motion time of the brake, which is closely related to the positive pressure of the brake on the brake disc, and is also related to the pressure of the brake disc. The ability t...
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The invention relates to the technical field of mining hoists and discloses a method and a device for measuring gradient of lost motion time of a disc brake in real time. In the method, displacement sensors adopted are mounted on the disc brake and are connected with an industrial-control computer through an acquisition card / PLC (programmable logic controller), the industrial-control computer is connected with telescopic brakes through a gate control system, and the gate control system controls electric signals controlling telescoping of the brakes and is connected with the acquisition card / PLC. The method adopting a forward gradient method and a reverse gradient method includes measuring forward or reverse gradient of points on a displacement course curve one by one along the forward or reverse data acquisition sequence, measuring the positions of the point B and the point E by comparing changes of the forward or reverse gradients, and measuring lost motion time Tb=(me-mb) T of the telescopic brakes. Compared with an existing lost motion time measuring method, the method for measuring gradient of lost motion time of the disc brake is more suitable for physical behavior characteristics of lost motion time of the brakes and has the advantages of high data measuring accuracy, convenience and simplicity and capability of online detecting lost motion time in real time.
Description
technical field [0001] The invention relates to the technical field of mine hoists, in particular to a gradient method and device for real-time measuring the lost motion time of disc brakes. Background technique [0002] In the 2006 edition of the national "Coal Mine Safety Regulations", it is stipulated in the fourth hundred and thirty-first article that "the lost motion time of the safety gate or the first level of the safety gate from when the protection circuit is powered off to when the brake shoe touches the brake wheel: ..., Disc brakes shall not exceed 0.3S, ...". [0003] The disc brake of the hoist is released or closed under the control of the release / close signal of the brake control. When the brake is released, figure 1 Under the action of the oil pressure P of the pressure oil in the middle oil cylinder 5, the brake brake 2 is released, there is a gap between the brake brake 2 and the brake disc 7, the roller 8 can drive the brake disc to rotate, and the hois...
Claims
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Inventor 安玉良张宏田贵栋索有为姜海涛马跃锋刘灵华田圣彬郜福星周宏铎李娟张伟程爱学黎启轩李向阳
Owner LUOYANG CITIC HIC AUTOMATION ENG