CN111285281A - Method for controlling brake sticking action consistency of multiple sets of brakes of mine hoist - Google Patents
Method for controlling brake sticking action consistency of multiple sets of brakes of mine hoist Download PDFInfo
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- CN111285281A CN111285281A CN202010123750.3A CN202010123750A CN111285281A CN 111285281 A CN111285281 A CN 111285281A CN 202010123750 A CN202010123750 A CN 202010123750A CN 111285281 A CN111285281 A CN 111285281A
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- brake
- disc
- disc brake
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- sticking
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
- B66D5/00—Braking or detent devices characterised by application to lifting or hoisting gear, e.g. for controlling the lowering of loads
- B66D5/02—Crane, lift hoist, or winch brakes operating on drums, barrels, or ropes
- B66D5/12—Crane, lift hoist, or winch brakes operating on drums, barrels, or ropes with axial effect
- B66D5/14—Crane, lift hoist, or winch brakes operating on drums, barrels, or ropes with axial effect embodying discs
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
- B66D5/00—Braking or detent devices characterised by application to lifting or hoisting gear, e.g. for controlling the lowering of loads
- B66D5/02—Crane, lift hoist, or winch brakes operating on drums, barrels, or ropes
- B66D5/24—Operating devices
- B66D5/26—Operating devices pneumatic or hydraulic
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- Mechanical Engineering (AREA)
- Braking Arrangements (AREA)
Abstract
The invention discloses a method for controlling brake sticking action consistency of multiple sets of brakes of a mine hoist, which comprises the following steps of firstly improving the control mode of disc brakes of a high-speed heavy-load mine hoist, wherein each disc brake is controlled by adopting an independent electro-hydraulic proportional reversing valve; the brake sticking action consistency of a plurality of disc brakes is ensured by artificially presetting the same brake sticking time and adopting a disc brake position closed-loop control mode; the brake shoe abrasion loss is detected in real time, the brake sticking oil supply pressure control value of each disc brake is corrected through the abrasion loss, the pressing force of all the disc brakes finally acting on the contact surface of the brake disc is the same by adopting a pressure closed loop control mode, and the brake sticking pressure consistency of the disc brakes is ensured. The method provided by the invention is simple and reliable, convenient to operate, strong in adaptability, high in control performance, good in using effect and wide in practicability.
Description
Technical Field
The invention belongs to the technical field of mine hoists, and particularly relates to a method for controlling brake sticking action consistency of multiple sets of brakes of a mine hoist.
Background
The mine hoist is used for conveying mine materials, underground equipment and operators, is a throat for mine production, and the brake system serving as the last step of the hoist is also the most critical safety guarantee equipment and is an indispensable important component of the hoist. Whether the braking system can work safely and effectively is directly related to the safe operation of the hoister, so that the production of the whole mine and the life safety of personnel are all influenced.
The multiple sets of brakes of the existing mining hoist are controlled by the same hydraulic element, the braking action is that the pressure of an oil supply cavity of the disc brake is controlled to be at the same braking pressure, the brake overcomes the high-pressure oil acting force of the oil supply cavity under the action of a disc spring to eliminate the gap between a brake shoe and a brake disc, and each brake keeps a certain pressing force after the brake shoe contacts the brake disc.
Disclosure of Invention
The invention aims to provide a method for controlling consistency of brake sticking actions of multiple sets of brakes of a mine hoist, which can stick brakes simultaneously and ensure that pressing forces acting on a brake disc are consistent when a brake shoe contacts the brake disc.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows: a method for controlling brake sticking action consistency of multiple sets of brakes of a mine hoist comprises the following steps:
a) the control method of the disc brake of the high-speed heavy-load mine hoist is improved, and each disc brake is controlled by an independent electro-hydraulic proportional reversing valve;
b) setting the direction of the disc brake close to the brake disc as the positive direction of displacement motion measurement, and recording the displacement y of the corresponding disc brake when the disc brake is attached by using a displacement sensor arranged on each disc brake before the disc brake is installed and debugged and is not normally operatedimax0And a full post-release displacement yimin0Wherein i represents the ith disc brake;
c) before a brake releasing command is given by starting operation of the mine hoist, the current displacement y of each disc brake is recorded by using a displacement sensor arranged on each disc brakeimaxAfter the mine hoist is started to run and a brake releasing command is given, the displacement y of each disc brake at present is recorded after the disc brakes are completely openedimin；
d) When the disc brakes are needed to brake in the operation process of the mine hoist, setting a displacement tracking curve y of each disc brakeiIs composed of
Wherein △ T is a preset given value of gate-closing time for a person, T is a time variable,
under the action of the electro-hydraulic proportional reversing valve, the brake of each disc brake tracks the curve y according to the set displacement under the closed-loop control of the position of the corresponding electro-hydraulic proportional reversing valveiThe operation is carried out, and the brake sticking action of the disc brake is completed;
e) when each disc brake runs to reach the switch-on position point yimaxThen, the brake sticking pressure P of each disc brake is calculatedirefIs calculated by the formula
Wherein: pi0The oil pressure value A of the oil supply cavity of the ith disc brake is preset according to the actual working conditioniFor the effective active area, K, of the piston rod in the oil supply chamber of the i-th disc brakeiCoefficient of stiffness for the ith disc brake Belleville spring, △ yiAmount of shoe wear for i-th disc brake, △ yiThe calculation formula is △ yi＝(yimax-yimin)-(yimax0-yimin0)；
f) Under the action of the electro-hydraulic proportional directional valve, the brake of the disc brake is immediately switched from a position closed-loop control mode to a pressure closed-loop control mode by using an oil pressure sensor arranged on an oil supply cavity of the disc brake, and the brake-attaching pressure of each disc brake is controlled to be kept at a corresponding set value PirefThe above step (1);
g) finishing the synchronous brake sticking action of a plurality of disc brakes, and repeating the steps c) to f) when the next brake sticking action is needed.
Preferably, the electro-hydraulic proportional directional valve adopts a valve core structure with a positive covering center.
Preferably, the value range of the manually set closing time given value △ T is △ T less than or equal to 250 ms.
Further, when the brake shoe wear amount △ yiWhen the value of the brake shoe abrasion allowance is larger than the set brake shoe abrasion allowance upper limit value, the control system sends out early warning to remind of replacing the brake shoe of the ith disc brake.
Further, the lower brake shoe abrasion amount △ y at the same timeiAnd when the i is the maximum, the control system sends out an early warning to remind that the performance of the kth disc brake is the maximum different from the performances of the rest disc brakes.
Compared with the prior art, the invention has the following beneficial effects:
1) a plurality of disc brakes of the existing mine hoist all adopt a 'one-control-more' control mode, and each disc brake cannot be independently controlled, so that the control capability of the consistency of the brake sticking actions of the plurality of brakes is not provided;
2) when the invention controls the brake sticking action of all the disc brakes, the same brake sticking time is preset artificially, and the position closed-loop control mode of the disc brakes is further adopted, so that all the disc brakes can still run on the contact surface of the brake disc at the same time even under the condition that the brake shoe abrasion difference exists in each disc brake, and the brake sticking action consistency of a plurality of the disc brakes is ensured;
3) the conventional disc brakes have displacement and oil pressure detection functions, brake shoe abrasion loss of each disc brake can be detected in real time on the premise of not additionally adding a sensor, brake shoe replacement reminding and disc brake difference early warning can be carried out according to the abrasion loss, and use safety is improved;
4) the existing mine hoist is used for controlling the pressure of an oil supply cavity of a disc brake to be the same constant value, and as brake shoes are worn in practice, the motion displacement of the brake sticking of each disc brake is different, so that the pressing force acting on the contact surface of the brake disc is different under the same oil supply pressure, and the consistency of the pressing force of a plurality of brakes cannot be really ensured; according to the invention, the brake shoe abrasion loss is detected, the brake sticking oil supply pressure control value of each disc brake is corrected through the abrasion loss, and the pressing force finally applied to the contact surface of the brake disc by all the disc brakes is the same by adopting a pressure closed-loop control mode, so that the brake sticking pressure consistency of a plurality of disc brakes is ensured in a real sense;
5) the method provided by the invention is simple and reliable, convenient to operate, strong in adaptability, high in control performance, good in using effect and wide in practicability.
Drawings
Fig. 1 is a schematic diagram of a method for controlling brake sticking action consistency of multiple sets of brakes of a mine hoist.
Fig. 2 is a schematic diagram of a modified mine hoist disc brake system.
FIG. 3 is a schematic view of a disc brake shoe wear calculation.
In the figure: the hydraulic brake system comprises a winding drum 1, a brake disc 2, a disc brake 3, an oil pressure sensor 4, a displacement sensor 5 and an electro-hydraulic proportional reversing valve 6.
Detailed Description
The invention is described in further detail below with reference to the figures and specific examples.
As shown in fig. 1, the method for controlling the brake sticking action consistency of multiple sets of brakes of a mine hoist provided by the invention comprises the following steps:
a) the control method of the disc brake of the high-speed heavy-load mine hoist is improved, and each disc brake is controlled by an independent electro-hydraulic proportional reversing valve;
the improved disc type braking system structure of the mine hoist is shown in fig. 2 and comprises a winding drum 1, one side of the winding drum 1 is connected with a braking disc 2, four disc brakes 3 are symmetrically arranged on the upper side, the lower side and the left side of the braking disc 2 to brake the winding drum 1, an oil cylinder of each disc brake 3 is connected with an electro-hydraulic proportional reversing valve 6 through a hydraulic pipeline, and the four electro-hydraulic proportional reversing valves 6 are respectively connected with a hydraulic system. In addition, the electro-hydraulic proportional directional valve 6 can also be replaced by an electro-hydraulic servo valve.
An oil pressure sensor 4 is installed on the oil supply cavity of each disc brake 3, and a displacement sensor 5 is installed on one side, close to the brake disc 2, of each disc brake 3.
b) Setting the direction of the disc brake 3 close to the brake disc 2 as the positive direction of displacement motion measurement, and recording the displacement y of the corresponding disc brake 3 when the disc brake 3 is applied by using the displacement sensor 5 installed on each disc brake 3 before the disc brake 3 is installed and debugged and is not normally operatedimax0And a full post-release displacement yimin0Wherein i represents the ith disc brake;
c) before a brake release command is given by starting operation of the mine hoist, the current displacement y of each disc brake 3 is recorded by using a displacement sensor 5 arranged on each disc brake 3imaxAfter the mine hoist is started to run and a brake releasing command is given, the current displacement y of each disc brake 3 is recorded after the disc brakes 3 are completely openedimin；
d) When the disc brakes 3 are required to brake in the operation process of the mine hoist, setting a displacement tracking curve y of each disc brake 3iIs composed of
Wherein △ T is an artificially set brake sticking time given value, the value range of △ T is △ T is less than or equal to 250ms, and T is a time variable;
under the action of the electro-hydraulic proportional directional valves 6, the brake of each disc brake 3 is tracked according to the set displacement under the closed-loop control of the positions of the corresponding electro-hydraulic proportional directional valves 6Curve yiThe operation is completed, and the brake sticking action of the disc brake 3 is completed;
e) when each disc brake 3 runs to reach the switch-on position point yimaxThen, the brake sticking pressure P of each disc brake 3 is calculatedirefIs calculated by the formula
Wherein: pi0The oil pressure value of an oil supply cavity of the ith disc brake is preset according to the actual working condition; a. theiThe effective acting area of a piston rod of an oil supply cavity of the ith disc brake is set; kiThe stiffness coefficient of the ith disc brake belleville spring △ yiAmount of shoe wear for i-th disc brake, △ yiThe calculation formula is △ yi＝(yimax-yimin)-(yimax0-yimin0) The brake shoe wear amount calculation schematic diagram is shown in FIG. 3;
f) under the action of the electro-hydraulic proportional directional valve 6, the brake of the disc brake 3 is immediately switched from the position closed-loop control mode to the pressure closed-loop control mode by using the oil pressure sensor 4 arranged on an oil supply cavity of the disc brake 3, and the brake sticking pressure of each disc brake 3 is controlled to be kept at a corresponding set value PirefThe above step (1);
g) finishing the synchronous brake sticking action of a plurality of disc brakes 3, and repeating the steps c) to f) when the next brake sticking action is needed.
Wherein when said brake shoe wear amount △ yiWhen the value of the brake shoe abrasion allowance is larger than the set brake shoe abrasion allowance upper limit value, the control system sends out early warning to remind the brake shoe of the ith disc brake 3 to be replaced.
Wherein, the lower brake shoe abrasion loss △ y is carried out at the same timeiWhen the value is maximum when the value is k, the control system sends out an early warning to remind that the performance of the kth disc brake 3 is the most different from the performance of the rest disc brakes 3.
The above description is only of the preferred embodiments of the present invention, and it should be noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the invention and these are intended to be within the scope of the invention.
Claims (5)
1. A method for controlling brake sticking action consistency of multiple sets of brakes of a mine hoist is characterized by comprising the following steps:
a) the control method of the disc brake of the high-speed heavy-load mine hoist is improved, and each disc brake is controlled by an independent electro-hydraulic proportional reversing valve;
b) setting the direction of the disc brake close to the brake disc as the positive direction of displacement motion measurement, and recording the displacement y of the corresponding disc brake when the disc brake is attached by using a displacement sensor arranged on each disc brake before the disc brake is installed and debugged and is not normally operatedimax0And a full post-release displacement yimin0Wherein i represents the ith disc brake;
c) before a brake releasing command is given by starting operation of the mine hoist, the current displacement y of each disc brake is recorded by using a displacement sensor arranged on each disc brakeimaxAfter the mine hoist is started to run and a brake releasing command is given, the displacement y of each disc brake at present is recorded after the disc brakes are completely openedimin；
d) When the disc brakes are needed to brake in the operation process of the mine hoist, setting a displacement tracking curve y of each disc brakeiIs composed of
△ T is a preset given value of gate-closing time for people, and T is a time variable;
under the action of the electro-hydraulic proportional reversing valve, the brake of each disc brake tracks the curve y according to the set displacement under the closed-loop control of the position of the corresponding electro-hydraulic proportional reversing valveiThe operation is carried out, and the brake sticking action of the disc brake is completed;
e) when each disc brake is operatedBrake sticking position point yimaxThen, the brake sticking pressure P of each disc brake is calculatedirefIs calculated by the formula
Wherein: pi0The oil pressure value A of the oil supply cavity of the ith disc brake is preset according to the actual working conditioniFor the effective active area, K, of the piston rod in the oil supply chamber of the i-th disc brakeiCoefficient of stiffness for the ith disc brake Belleville spring, △ yiAmount of shoe wear for i-th disc brake, △ yiThe calculation formula is △ yi＝(yimax-yimin)-(yimax0-yimin0)；
f) Under the action of the electro-hydraulic proportional directional valve, the brake of the disc brake is immediately switched from a position closed-loop control mode to a pressure closed-loop control mode by using an oil pressure sensor arranged on an oil supply cavity of the disc brake, and the brake-attaching pressure of each disc brake is controlled to be kept at a corresponding set value PirefThe above step (1);
g) finishing the synchronous brake sticking action of a plurality of disc brakes, and repeating the steps c) to f) when the next brake sticking action is needed.
2. The method for controlling the brake sticking action consistency of multiple sets of brakes of a mine hoist according to claim 1, wherein the electro-hydraulic proportional directional valve adopts a valve core structure with a positive covering at a middle position.
3. The method for controlling the brake sticking action consistency of multiple sets of brakes of a mine hoist as claimed in claim 1, wherein the value range of the manually set brake sticking time given value △ T is △ T is less than or equal to 250 ms.
4. The method as claimed in claim 1, wherein the method further comprises the step of applying a brake to the multiple sets of brakes to control the brake-sticking operation of the multiple sets of brakes when the brake shoes are wornAmount △ yiWhen the value of the brake shoe abrasion allowance is larger than the set brake shoe abrasion allowance upper limit value, the control system sends out early warning to remind of replacing the brake shoe of the ith disc brake.
5. The method of claim 1, wherein the amount of wear △ y of the lower shoe at the same time is equal to the amount of wear of the lower shoeiAnd when the i is the maximum, the control system sends out an early warning to remind that the performance of the kth disc brake is the maximum different from the performances of the rest disc brakes.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010123750.3A CN111285281B (en) | 2020-02-27 | 2020-02-27 | Method for controlling brake sticking action consistency of multiple sets of brakes of mine hoist |
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| CN202010123750.3A CN111285281B (en) | 2020-02-27 | 2020-02-27 | Method for controlling brake sticking action consistency of multiple sets of brakes of mine hoist |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112178090A (en) * | 2020-10-20 | 2021-01-05 | 洛阳中重自动化工程有限责任公司 | Method for online detection of brake sticking pressure of disc brake |
| CN115448199A (en) * | 2022-09-15 | 2022-12-09 | 中国矿业大学 | Mine hoist multi-channel brake system cooperative control method |
| CN115557382A (en) * | 2022-09-15 | 2023-01-03 | 中国矿业大学 | Multi-point cooperative braking control method for monorail crane |
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| CN110219836A (en) * | 2019-06-10 | 2019-09-10 | 徐州大恒测控技术有限公司 | A kind of mine hoist safety switching brake perseverance deceleration hydraulic system and braking method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112178090A (en) * | 2020-10-20 | 2021-01-05 | 洛阳中重自动化工程有限责任公司 | Method for online detection of brake sticking pressure of disc brake |
| CN115448199A (en) * | 2022-09-15 | 2022-12-09 | 中国矿业大学 | Mine hoist multi-channel brake system cooperative control method |
| CN115557382A (en) * | 2022-09-15 | 2023-01-03 | 中国矿业大学 | Multi-point cooperative braking control method for monorail crane |
| CN115448199B (en) * | 2022-09-15 | 2024-01-26 | 中国矿业大学 | Mine hoist multichannel braking system cooperative control method |
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| CN115557382B (en) * | 2022-09-15 | 2024-09-20 | 中国矿业大学 | Multi-point cooperative braking control method for monorail crane |
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