CN104477809A - Mine hoist braking double closed-loop regulating device and manufacture method - Google Patents
Mine hoist braking double closed-loop regulating device and manufacture method Download PDFInfo
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- CN104477809A CN104477809A CN201410748302.7A CN201410748302A CN104477809A CN 104477809 A CN104477809 A CN 104477809A CN 201410748302 A CN201410748302 A CN 201410748302A CN 104477809 A CN104477809 A CN 104477809A
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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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Abstract
The invention belongs to the mine hoist braking control technology and provides a mine hoist braking double closed-loop regulating device comprising a constant deceleration braking and service braking common hydraulic station (15) and an electric hydraulic pressure regulating device (13); the oil pressure of the hydraulic station (15) is regulated by a device body through the electric hydraulic pressure regulating device (13); the double closed-loop regulating device comprises a speed ring, a pressure ring and a power amplifier (10); the pressure ring comprises a service braking pressure setter (6), a pressure ring comparator (5), a pressure regulator (7), a pressure regulating range limiter (8), a pressure drop rate limiter (9) and a pressure sensor (12); the speed ring comprises a safety braking speed setter (2), a speed ring comparator (3), a speed regulator (4) and a speed sensor (11). By the aid of the device, the purpose of safe and stable braking and shutting of the hoist is achieved.
Description
Technical field
The invention belongs to mine hoist Brake Control, be specifically related to two close cycles control apparatus and the braking method of the braking of a kind of mine hoist.
Background technology
Mine hoist braking comprises service braking and safety arrestment; Described safety arrestment is mine hoist or mine winder, and the braking of sudden stop during deadly condition occurs in operational process.At present, in prior art, the mode of safety arrestment has one-level braking, two stage braking and constant deceleration brake; Wherein one-level braking seldom uses; Two stage braking is a kind of traditional safety arrestment mode, belongs to constant moment of force braking, adopts two-stage brake hydraulic station as the feed apparatus of disc-brake; Two stage braking process is exactly be divided into secondary to brake the whole lock torques needed for certain gig; But two stage braking mainly exists following shortcoming: 1) during safety arrestment, braking force divides secondary to apply to get on, and braking procedure comprises hoisting cable and derrick or headframe facility to mechanical equipment and impacts large, there is potential safety hazard; 2) heavy lift and decentralization process, the Tension Difference difference of hoisting cable significantly, for same used two-stage brake hydraulic station, take into account heavy lift and weight transfers the significant operating mode of two species diversity, debug difficulties, and braking effect is not good; Constant deceleration brake is on the basis of two-stage brake hydraulic station, add the oil sources and electro-hydraulic pressure regulation link that control to provide for slowing down for perseverance; Although constant deceleration brake overcomes some problems that two stage braking exists, but also there is other shortcoming, as: 1) service braking and constant deceleration brake process oil sources used and electro-hydraulic pressure regulator device be separately and repeat to arrange, permanent deceleration Hydraulic Station complex structure, debug difficulties, though braking effect is improved, poor repeatability; 2) safety arrestment is a random event, cannot regularly to realizing permanent deceleration link or unit carries out in-use performance checking in daily production process, until when permanent deceleration needs place in operation, permanent deceleration link or unit may be malfunctioning, there is other potential safety hazard equally.
Summary of the invention
For solving the problems of the technologies described above, the object of the invention is the two close cycles control apparatus and the braking method that propose the braking of a kind of mine hoist.
The present invention takes following technical scheme for completing foregoing invention object:
A two close cycles control apparatus for mine hoist braking, described mine hoist braking comprises safety arrestment and service braking; Described safety arrestment adopts constant deceleration brake; Described constant deceleration brake and service braking share Hydraulic Station and electro-hydraulic pressure regulator device; The oil sources of described Hydraulic Station is provided by oil pump; The oil pressure of described Hydraulic Station is regulated by electro-hydraulic pressure regulator device by two close cycles control apparatus; Described two close cycles control apparatus includes speed ring, pressure ring and power amplifier;
Described pressure ring includes clipper, pressure drop rate killer and pressure sensor between service brake pressure setter, pressure ring comparator, pressure regulator, pressure regulatory region; Described pressure sensor is used for carrying out Real-Time Monitoring to the actual pressure of disc-brake; The mouth of described pressure sensor is connected to the input end of pressure ring comparator, and the actual pressure of Hydraulic Station is sent into pressure ring comparator; Described service brake pressure setter is connected to the input end of pressure ring comparator by the open contact of safety relay AC, the setting pressure in service braking process is sent into pressure ring comparator; In described pressure ring comparator, the actual pressure of the setting pressure given in service braking process and Hydraulic Station is compared; The mouth of described pressure ring comparator is connected to the input end of pressure regulator; The mouth of described pressure regulator is connected with electro-hydraulic pressure regulator device by power amplifier, carries out power gain by power amplifier to the weak electric signal that pressure closed loop exports, and adjusts to drive the carrying out of electro-hydraulic pressure regulator device to Hydraulic Station pressure in Hydraulic Station; Between described pressure regulatory region, the mouth of clipper is connected to the amplitude limit input end of pressure regulator by the normally closed contact of safety relay AC, implement to carry out the control of upper and lower limit amplitude limit to the output signal of pressure regulator in permanent deceleration conditioning period in safety arrestment process, impel lock torque more even, brake more steady; In service braking process, the normally closed contact of safety relay AC disconnects, and between pressure regulatory region, the pressure amplitude limit of clipper is cancelled;
Described speed ring includes safety arrestment speed setter, speed ring comparator, speed regulator and speed sensor; The input end of described safety arrestment speed setter is connected with speed sensor by the open contact of safety relay AC; Described speed sensor is arranged on mine hoist, in order to carry out Real-Time Monitoring to the speed of mine hoist; The mouth of described speed sensor, described safety arrestment speed setter is all connected with the input end of speed ring comparator, gives speed ring comparator by the safety arrestment given speed of safety arrestment speed setter and the actual speed of mine hoist; The described given speed of safety arrestment speed setter is to successively decrease the numerical value formed by the deceleration/decel of setting using the spot speed of mine hoist safety braking as initial value in safety arrestment process; Compare given speed and actual speed in described speed ring comparator, the mouth of speed ring comparator is connected to the input end of speed regulator; The mouth of speed regulator is connected to the input end of pressure ring comparator, the setting pressure signal in safety arrestment process is sent into the input end of pressure ring comparator; Pressure ring comparator compares the actual pressure that the setting pressure in safety arrestment process and pressure sensor send into pressure ring comparator; In perseverance deceleration safety arrestment process, Hydraulic Station carries out pressure adjustment according in the restriction interval of the velocity deviation situation of speed closed loop clipper between pressure regulatory region, the speed of gig in safety arrestment process is successively decreased by the deceleration/decel of setting, by direction of improvement or the size of load and the impact of safety arrestment spot speed size, safety arrestment process average deceleration value keeps constant.
Pressure drop rate killer is provided with between described pressure regulator and described power amplifier, the described rate of descent of pressure drop rate killer to pressure limits, the action inertia of pressure changing and disc-brake is matched, eliminate impact and the sound of safety arrestment and service braking docking process, steadily stop.
Between described pressure regulatory region, the upper pressure limit P1 of clipper is less than the oil pressure contacting brake value Pa, low pressure limit P
2be greater than Hydraulic Station residual voltage P
b .
The Enable Pin of described speed regulator is by the open contact short circuit of safety relay AC, and in mine hoist service braking process, speed regulator is blocked, and it is zero that speed regulator exports, and speed ring is inoperative.
Described safety relay AC includes the coil of wire and contact; Connection between described safety relay AC and safety arrestment speed setter, speed ring comparator, speed regulator, pressure ring comparator, service brake pressure setter, pressure regulator, pressure regulatory region between clipper, pressure drop rate killer comprises logical relation, can be realized by hardware or software or software and hardware combining.
The two close cycles control apparatus adopting above-mentioned mine hoist to brake carries out the method for mine hoist braking, and the braking of described mine hoist comprises service braking process and safety arrestment process.
In service braking process, the coil of wire of safety relay AC obtains electric, and the open contact of safety relay AC is closed, normally closed contact disconnects, and speed regulator is blocked, and speed ring is inoperative; Meanwhile, between pressure regulatory region, the mouth of clipper is also disconnected by the normally closed contact of safety relay AC, and pressure amplitude limit is cancelled; Safety arrestment speed setter keeps carrying out Real-Time Monitoring to the output valve of speed sensor and the running velocity of gig, the output of service brake pressure setter compares as between setting pressure and actual pressure, closed loop adjustment is carried out through pressure regulator, the output signal of pressure regulator carries out regulation and control by pressure drop rate killer and power amplifier to electro-hydraulic pressure regulator device, make the exporting change of the pressure follow service brake pressure setter of Hydraulic Station, disk brake carries out declutching and tight lock action and service braking thereupon.
In safety arrestment process, the power-off of the safety relay AC coil of wire, its open contact disconnects, normally closed contact closes, service brake pressure setter is cut, speed regulator is lifted a blockade, the output signal of speed regulator as setting pressure, and is regulated pressure by clipper between pressure regulatory region, the gig running velocity of moment is there is as initial value in safety arrestment speed setter using monitoring safety arrestment, and decay by the deceleration/decel of setting, the deceleration/decel of this setting is exactly the given deceleration/decel of safety arrestment, the given speed that initial value and deceleration/decel are formed and the actual speed that speed sensor detects compare, when actual speed is greater than given speed, the output of speed ring comparator is negative value, the output of speed regulator is reduced, namely the pressure given value of pressure ring reduces, the output of pressure ring comparator is negative value, closed loop adjustment is carried out through pressure regulator, the output signal of pressure regulator carries out regulation and control by pressure drop rate killer and power amplifier to electro-hydraulic pressure regulator device, the delivery pressure in Hydraulic Station is forced to reduce, disk brake oil return pressure release is also toward tight lock direction action, increase lock torque, make mine hoist strengthen deceleration/decel to slow down, when actual speed is less than given speed, the output of speed ring comparator be on the occasion of, the output of speed regulator is increased, namely the pressure given value of pressure ring increases, the output of pressure ring comparator be on the occasion of, closed loop adjustment is carried out through pressure regulator, the output signal of pressure regulator carries out regulation and control by pressure drop rate killer and power amplifier to electro-hydraulic pressure regulator device, the delivery pressure in Hydraulic Station is forced to increase, the oil-filled supercharging of disk brake is also toward declutching direction action, reduce lock torque, make mine hoist reduce deceleration value to slow down, the result that speed closed loop regulates, during the permanent deceleration safety arrestment of enforcement, average deceleration value remains constant, reach the object of permanent deceleration safety arrestment.
At the permanent deceleration control period of safety arrestment implementation Process, the pressure regulation spectrum of Hydraulic Station is under pressure the restriction of clipper between regulatory region, limits P under stress
2~ upper pressure limit P
1interval in regulate, the lock torque guaranteeing safety arrestment is more even, and braking procedure is more steady.
The two close cycles control apparatus of a kind of mine hoist braking that the present invention proposes and braking method, safety arrestment and service braking adopt same Hydraulic Station and electrohydraulic control equipment, do not need to be equipped with special perseverance deceleration Hydraulic Station, achieve the constant deceleration brake function of mine hoist, reaching gig can the object of safety and steady stopping-down, compared to existing known technology, at the perseverance deceleration conditioning period of safety arrestment process, oil pump still works and provides oil sources for perseverance deceleration adjustment, compared with known permanent deceleration Hydraulic Station, the permanent oil sources controlled that slows down is provided by links such as the accumulator separately established and electro-hydraulic pressure regulations thereof, the present invention does not have particular/special requirement to Hydraulic Station, Hydraulic Station principle used is simple, its oil circuit and device used are less cleaner and tidier, the cost realized required for permanent deceleration is lower, constant deceleration brake and service braking share oil sources and electro-hydraulic pressure regulator device, the task performance of oil circuit and hydraulic component and unfailing performance access regular checking, fault rate is lower, braking procedure and stop more steady and safety, have obvious social and economic benefits.
Accompanying drawing explanation
Fig. 1 is functional block diagram of the present invention.
Fig. 2 is the characteristic of clipper between pressure regulatory region in the present invention.
In figure: 1, safety relay AC, 2, safety arrestment speed setter, 3, speed ring comparator, 4, speed regulator, 5, pressure ring comparator, 6, service brake pressure setter, 7, pressure regulator, 8, clipper between pressure regulatory region, 9, pressure drop rate killer, 10, power amplifier, 11. speed sensors, 12, pressure sensor, 13, electro-hydraulic pressure regulator device, 14, oil pump, 15, Hydraulic Station, 16, disk brake, 17, mine hoist.
Detailed description of the invention
With specific embodiment, the present invention is illustrated by reference to the accompanying drawings:
As shown in Figure 1, a kind of two close cycles control apparatus of mine hoist braking, described mine hoist braking comprises safety arrestment and service braking; Described safety arrestment adopts constant deceleration brake; Described constant deceleration brake and service braking share Hydraulic Station 15 and electro-hydraulic pressure regulator device 13; The oil sources of described Hydraulic Station 15 is provided by oil pump 14; The oil pressure of described Hydraulic Station 14 is regulated by electro-hydraulic pressure regulator device 13 by two close cycles control apparatus; Described two close cycles control apparatus 13 includes speed ring, pressure ring and power amplifier 10.
Described pressure ring includes clipper 8 between service brake pressure setter 6, pressure ring comparator 5, pressure regulator 7, pressure regulatory region, pressure drop rate killer 9 and pressure sensor 12; Described pressure sensor 12 is for carrying out Real-Time Monitoring to the actual pressure of Hydraulic Station 15; The mouth of described pressure sensor 12 is connected to the input end of pressure ring comparator 5, and the actual pressure of Hydraulic Station 15 is sent into pressure ring comparator 5; Described service brake pressure setter 6 is connected to the input end of pressure ring comparator 5 by the open contact of safety relay AC1, the setting pressure in service braking process is sent into pressure ring comparator 5; In described pressure ring comparator 5, the actual pressure of the setting pressure in service braking process and Hydraulic Station 15 is compared; The mouth of described pressure ring comparator 5 is connected to the input end of pressure regulator 7; The mouth of described pressure regulator 7 is connected with electro-hydraulic pressure regulator device 13 by power amplifier 10, the weak electric signal exported by power amplifier 10 pairs of pressure closed loops carries out power gain, adjusts to drive the carrying out of electro-hydraulic pressure regulator device 13 pairs of Hydraulic Station pressure in Hydraulic Station; Between described pressure regulatory region, the mouth of clipper 8 is connected to the amplitude limit input end of pressure regulator 7 by the normally closed contact of safety relay AC1, the output signal of pressure regulator carries out the control of upper and lower limit amplitude limit in safety arrestment process and in implementing in permanent deceleration conditioning period, impel lock torque more even, brake more steady; In service braking process, the normally closed contact of safety relay AC1 disconnects, and between pressure regulatory region, the pressure amplitude limit of clipper 8 is cancelled.
Described speed ring includes safety arrestment speed setter 2, speed ring comparator 3, speed regulator 4 and speed sensor 11; The input end of described safety arrestment speed setter 2 is connected with speed sensor 11 by the open contact of safety relay AC1; Described speed sensor 11 is arranged on mine hoist, in order to carry out Real-Time Monitoring to the speed of mine hoist; The mouth of described speed sensor 11, described safety arrestment speed setter 2 is all connected with the input end of speed ring comparator 3, gives speed ring comparator 3 by the safety arrestment given speed of safety arrestment speed setter 2 and the actual speed of mine hoist 17; The described given speed of safety arrestment speed setter 2 is to successively decrease the numerical value formed by the deceleration/decel of setting using the spot speed of mine hoist safety braking as initial value in safety arrestment process; Compare given speed and actual speed in described speed ring comparator 3, the mouth of speed ring comparator 3 is connected to the input end of speed regulator 4; The mouth of speed regulator 4 is connected to the input end of pressure ring comparator 5, the setting pressure in safety arrestment process is sent into the input end of pressure ring comparator; The actual pressure that setting pressure in pressure ring comparator 5 pairs of safety arrestment processes and pressure sensor 12 send into pressure ring comparator compares; In perseverance deceleration safety arrestment process, Hydraulic Station carries out pressure adjustment according in the restriction interval of the velocity deviation situation of speed closed loop clipper between pressure regulatory region, the speed of gig in safety arrestment process is successively decreased by the deceleration/decel of setting, by direction of improvement or the size of load and the impact of safety arrestment spot speed size, safety arrestment process average deceleration value keeps constant.
Pressure drop rate killer 9 is provided with between described pressure regulator 7 and described power amplifier 10, the rate of descent of described pressure drop rate killer 9 pairs of pressure limits, the action inertia of pressure changing and disc-brake is matched, eliminate impact and the sound of safety arrestment and service braking docking process, steadily stop.
As shown in Figure 2, the upper pressure limit P of clipper 8 between described pressure regulatory region
1be less than the oil pressure contacting brake value Pa, low pressure limit P
2be greater than Hydraulic Station residual voltage P
b, oil pressure lower limit P
2in the certain limit being greater than Hydraulic Station residual voltage, value is carried out, if value is P according to actual braking effect
a/ 4 ~ P
a/ 3, suitably adjust in the debug phase according to actual conditions.
The Enable Pin of described speed regulator 4 is by the open contact short circuit of safety relay AC1, and in mine hoist service braking process, speed regulator is blocked, and it is zero that speed regulator exports.
Described safety relay AC1 includes the coil of wire and contact; Connection between described safety relay AC1 and safety arrestment speed setter 2, speed ring comparator 3, speed regulator 4, pressure ring comparator 5, service brake pressure setter 6, pressure regulator 7, pressure regulatory region between clipper 8, pressure drop rate killer 9 comprises logical relation, can be realized by hardware or software or software and hardware combining.
The two close cycles control apparatus adopting above-mentioned mine hoist to brake carries out the method for mine hoist braking, and the braking of described mine hoist comprises service braking process and safety arrestment process.
In service braking process, the coil of wire of safety relay AC1 obtains electric, and the open contact of safety relay AC1 is closed, normally closed contact disconnects, and speed regulator 4 is blocked, and speed ring is inoperative, meanwhile, between pressure regulatory region, the mouth of clipper 8 is also disconnected by the normally closed contact of safety relay AC, and pressure amplitude limit is cancelled, safety arrestment speed setter 2 keeps carrying out Real-Time Monitoring to the output valve of speed sensor 11 and the running velocity of gig, the output of service brake pressure setter 6 compares as between setting pressure and actual pressure, closed loop adjustment is carried out through pressure regulator 7, the output signal of pressure regulator 7 carries out regulation and control by pressure drop rate killer 9 and power amplifier 10 pairs of electro-hydraulic pressure regulator devices 13, make the exporting change of the pressure follow service brake pressure setter of Hydraulic Station 15, disk brake 16 carries out declutching and tight lock action and service braking thereupon.
In safety arrestment process, the power-off of the safety relay AC1 coil of wire, its open contact disconnects, normally closed contact closes, service brake pressure setter 6 is cut, speed regulator 4 is lifted a blockade, the output signal of speed regulator 4 as setting pressure, and is regulated by the 8 pairs of pressure of clipper between pressure regulatory region, the gig running velocity of moment is there is as initial value in safety arrestment speed setter 2 using monitoring safety arrestment, and decay by the deceleration/decel of setting, the deceleration/decel of this setting is exactly the given deceleration/decel of safety arrestment, the given speed that initial value and deceleration/decel are formed and the actual speed that speed sensor detects compare, when actual speed is greater than given speed, the output of speed ring comparator 3 is negative value, the output of speed regulator 4 is reduced, namely the pressure given value of pressure ring reduces, the output of pressure ring comparator 5 is negative value, closed loop adjustment is carried out through pressure regulator 7, the output signal of pressure regulator 7 carries out regulation and control by pressure drop rate killer 9 and power amplifier 10 pairs of electro-hydraulic pressure regulator devices 13, the delivery pressure in Hydraulic Station 15 is forced to reduce, disk brake 16 oil return pressure release is also toward tight lock direction action, increase lock torque, make mine hoist strengthen deceleration/decel to slow down, when actual speed is less than given speed, the output of speed ring comparator 3 be on the occasion of, the output of speed regulator 4 is increased, namely the pressure given value of pressure ring increases, the output of pressure ring comparator 5 be on the occasion of, closed loop adjustment is carried out through pressure regulator 7, the output signal of pressure regulator 7 carries out regulation and control by pressure drop rate killer 9 and power amplifier 10 pairs of electro-hydraulic pressure regulator devices 13, the delivery pressure in Hydraulic Station 15 is forced to increase, the oil-filled supercharging of disk brake 16 is also toward declutching direction action, reduce lock torque, make mine hoist reduce deceleration value to slow down, the result that speed closed loop regulates, during the permanent deceleration safety arrestment of enforcement, average deceleration value remains constant, reach the object of permanent deceleration safety arrestment.
At the permanent deceleration control period of safety arrestment implementation Process, the pressure regulation spectrum of Hydraulic Station is under pressure the restriction of clipper between regulatory region, limits P under stress
2~ upper pressure limit P
1interval in regulate, the lock torque guaranteeing safety arrestment is more even, and braking procedure is more steady.
The foregoing is only method and preferred embodiment that the present invention realizes mine hoist constant deceleration brake, protection scope of the present invention is not limited thereto, and anyly all belongs within scope based on the equivalent transformation in technical solution of the present invention.
Claims (6)
1. a two close cycles control apparatus for mine hoist braking, described mine hoist braking comprises safety arrestment and service braking; Described safety arrestment adopts constant deceleration brake; It is characterized in that: described constant deceleration brake and service braking share Hydraulic Station (15) and electro-hydraulic pressure regulator device (13); The oil sources of described Hydraulic Station (15) is provided by oil pump (14); The oil pressure of described Hydraulic Station (14) is regulated by electro-hydraulic pressure regulator device (13) by two close cycles control apparatus; Described two close cycles control apparatus (13) includes speed ring, pressure ring and power amplifier (10);
Described pressure ring includes clipper (8), pressure drop rate killer (9) and pressure sensor (12) between service brake pressure setter (6), pressure ring comparator (5), pressure regulator (7), pressure regulatory region; Described pressure sensor (12) is for carrying out Real-Time Monitoring to the actual pressure of disc-brake (16); The mouth of described pressure sensor (12) is connected to the input end of pressure ring comparator (5), and the actual pressure of Hydraulic Station (15) is sent into pressure ring comparator (5); Described service brake pressure setter (6) is by safety relay AC(1) open contact be connected to the input end of pressure ring comparator (5), the setting pressure in service braking process is sent into pressure ring comparator (5); In described pressure ring comparator (5), the actual pressure of the setting pressure given in service braking process and Hydraulic Station (15) is compared; The mouth of described pressure ring comparator (5) is connected to the input end of pressure regulator (7); The mouth of described pressure regulator (7) is connected with electro-hydraulic pressure regulator device (13) by power amplifier (10), by power amplifier (10), power gain is carried out to the weak electric signal that pressure closed loop exports, adjust to drive electro-hydraulic pressure regulator device in Hydraulic Station (13) the carrying out to Hydraulic Station pressure; Between described pressure regulatory region, the mouth of clipper (8) is by safety relay AC(1) normally closed contact be connected to the amplitude limit input end of pressure regulator (7), implement to carry out the control of upper and lower limit amplitude limit to the output signal of pressure regulator in permanent deceleration conditioning period in safety arrestment process, impel lock torque more even, brake more steady; In service braking process, safety relay AC(1) normally closed contact disconnect, between pressure regulatory region, the pressure amplitude limit of clipper (8) is cancelled;
Described speed ring includes safety arrestment speed setter (2), speed ring comparator (3), speed regulator (4) and speed sensor (11); The input end of described safety arrestment speed setter (2) is by safety relay AC(1) open contact be connected with speed sensor (11); Described speed sensor (11) is arranged on mine hoist, in order to carry out Real-Time Monitoring to the speed of mine hoist; Described speed sensor (11), the mouth of described safety arrestment speed setter (2) are all connected with the input end of speed ring comparator (3), give speed ring comparator (3) by the actual speed of the safety arrestment given speed of safety arrestment speed setter (2) and mine hoist (17); The described given speed of safety arrestment speed setter (2) is to successively decrease the numerical value formed by the deceleration/decel of setting using the spot speed of mine hoist safety braking as initial value in safety arrestment process; Compare given speed and actual speed in described speed ring comparator (3), the mouth of speed ring comparator (3) is connected to the input end of speed regulator (4); The mouth of speed regulator (4) is connected to the input end of pressure ring comparator (5), the setting pressure in safety arrestment process is sent into the input end of pressure ring comparator; Pressure ring comparator (5) compares the actual pressure that the setting pressure in safety arrestment process and pressure sensor (12) send into pressure ring comparator; In perseverance deceleration safety arrestment process, Hydraulic Station carries out pressure adjustment according in the restriction interval of the velocity deviation situation of speed closed loop clipper between pressure regulatory region, the speed of gig in safety arrestment process is successively decreased by the deceleration/decel of setting, by direction of improvement or the size of load and the impact of safety arrestment spot speed size, safety arrestment process average deceleration value keeps constant.
2. the two close cycles control apparatus of a kind of mine hoist braking according to claim 1, it is characterized in that: between described pressure regulator (7) and described power amplifier (10), be provided with pressure drop rate killer (9), described pressure drop rate killer (9) rate of descent to pressure limits, the action inertia of pressure changing and disc-brake is matched, eliminate impact and the sound of safety arrestment and service braking docking process, steadily stop.
3. the two close cycles control apparatus of a kind of mine hoist braking according to claim 1, is characterized in that: between described pressure regulatory region, the upper pressure limit P1 of clipper (8) is less than the oil pressure contacting brake value Pa, and low pressure limit P2 is greater than Hydraulic Station residual voltage Pb
.
4. the two close cycles control apparatus of a kind of mine hoist braking according to claim 1, it is characterized in that: the Enable Pin of described speed regulator (4) is by safety relay AC(1) open contact short circuit, in mine hoist service braking process, speed regulator is blocked.
5. the two close cycles control apparatus of a kind of mine hoist braking according to claim 1, is characterized in that: described safety relay AC(1) include the coil of wire and contact; Described safety relay AC(1) and safety arrestment speed setter (2), speed ring comparator (3), speed regulator (4), pressure ring comparator (5), service brake pressure setter (6), pressure regulator (7), connection between pressure regulatory region between clipper (8), pressure drop rate killer (9) comprise logical relation, realized by hardware or software or software and hardware combining.
6. adopt the two close cycles control apparatus of mine hoist according to claim 1 braking to carry out the method for mine hoist braking, it is characterized in that: the braking of described mine hoist comprises service braking process and safety arrestment process;
In service braking process, safety relay AC(1) the coil of wire obtain electric, safety relay AC(1) closed, the normally closed contact of open contact disconnect, speed regulator (4) is blocked, and speed ring is inoperative, meanwhile, between pressure regulatory region, the mouth of clipper (8) is also disconnected by the normally closed contact of safety relay AC, and pressure amplitude limit is cancelled, safety arrestment speed setter (2) keeps carrying out Real-Time Monitoring to the output valve of speed sensor (11) and the running velocity of gig, the output of service brake pressure setter (6) compares as between setting pressure and actual pressure, closed loop adjustment is carried out through pressure regulator (7), the output signal of pressure regulator (7) carries out regulation and control by pressure drop rate killer (9) and power amplifier (10) to electro-hydraulic pressure regulator device (13), make the exporting change of the pressure follow service brake pressure setter of Hydraulic Station, disk brake carries out declutching and tight lock action and service braking thereupon,
In safety arrestment process, safety relay AC(1) coil of wire power-off, its open contact disconnects, normally closed contact closes, service brake pressure setter (6) is cut, speed regulator (4) is lifted a blockade, the output signal of speed regulator (4) as setting pressure, and is regulated pressure by clipper (8) between pressure regulatory region, the gig running velocity of moment is there is as initial value in safety arrestment speed setter (2) using monitoring safety arrestment, and decay by the deceleration/decel of setting, the deceleration/decel of this setting is exactly the given deceleration/decel of safety arrestment, the given speed that initial value and deceleration/decel are formed and the actual speed that speed sensor detects compare, when actual speed is greater than given speed, the output of speed ring comparator (3) is negative value, the output of speed regulator (4) is reduced, namely the pressure given value of pressure ring reduces, the output of pressure ring comparator (5) is negative value, closed loop adjustment is carried out through pressure regulator (7), the output signal of pressure regulator (7) carries out regulation and control by pressure drop rate killer (9) and power amplifier (10) to electro-hydraulic pressure regulator device (13), the delivery pressure in Hydraulic Station is forced to reduce, disk brake (16) oil return pressure release is also toward tight lock direction action, increase lock torque, make mine hoist strengthen deceleration/decel to slow down, when actual speed is less than given speed, the output of speed ring comparator (3) be on the occasion of, the output of speed regulator (4) is increased, namely the pressure given value of pressure ring increases, the output of pressure ring comparator (5) be on the occasion of, closed loop adjustment is carried out through pressure regulator (7), the output signal of pressure regulator (7) carries out regulation and control by pressure drop rate killer (9) and power amplifier (10) to electro-hydraulic pressure regulator device (13), the delivery pressure in Hydraulic Station is forced to increase, disk brake (16) oil-filled supercharging is also toward declutching direction action, reduce lock torque, make mine hoist reduce deceleration value to slow down, the result that speed closed loop regulates, during the permanent deceleration safety arrestment of enforcement, average deceleration value remains constant, reach the object of permanent deceleration safety arrestment.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410748302.7A CN104477809B (en) | 2014-12-10 | 2014-12-10 | The two close cycles adjusting means of mine hoist braking and braking method |
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| CN201410748302.7A CN104477809B (en) | 2014-12-10 | 2014-12-10 | The two close cycles adjusting means of mine hoist braking and braking method |
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| CN104477809B CN104477809B (en) | 2016-10-05 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN111352385A (en) * | 2020-03-13 | 2020-06-30 | 湖南网大科技有限公司 | System and method for controlling deceleration motion of working machine |
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| CN110104531A (en) * | 2019-05-21 | 2019-08-09 | 山东东山新驿煤矿有限公司 | Hoister control protection system and control method based on permanent deceleration hydraulic station |
| CN110104531B (en) * | 2019-05-21 | 2021-10-01 | 山东东山新驿煤矿有限公司 | Elevator control protection system and control method based on constant-deceleration hydraulic station |
| CN111352385A (en) * | 2020-03-13 | 2020-06-30 | 湖南网大科技有限公司 | System and method for controlling deceleration motion of working machine |
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