CN102785652B - Integrated control system of wheel type engineering machine - Google Patents
Integrated control system of wheel type engineering machine Download PDFInfo
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- CN102785652B CN102785652B CN201210293908.7A CN201210293908A CN102785652B CN 102785652 B CN102785652 B CN 102785652B CN 201210293908 A CN201210293908 A CN 201210293908A CN 102785652 B CN102785652 B CN 102785652B
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Abstract
The invention discloses an integrated control system of a wheel type engineering machine. A travel braking system and a parking braking system in the integrated control system are independent from each other and do not influence each other. A series pedal valve is treaded by a foot in the travel braking process and controlled to achieve synchronous braking of a front axle wet disc brake and a rear axle wet disc brake; and a parking and emergency braking valve block is controlled through pressing down a parking and emergency braking valve button to open a working oil hole to achieve parking braking in the parking and emergency braking process. According to the integrated control system, the braking operability, reliability and direction stability of the whole machine are effectively improved.
Description
Technical field
The present invention relates to a kind of control system, specifically a kind of industrial wheeled equipment complex control system.
Background technology
Industrial wheeled equipment generally has two kinds of brake system: air-operated hydraulic brake and Full-hydraulic braking apparatus.The application of air-operated hydraulic brake system is more, but this system need to configure Air compressor, oil water separator, storage tank, pressure controller, air brake valve, pneumatic jack, does not go out booster pump, air pipe and oil pipe line etc.; Structure is too complicated and be difficult for layout, and power consumption is large, noise is large, and at work, frequent braking can produce amount of heat makes brake system seal failure, causes braking effect unreliable.
Full-hydraulic braking apparatus form is compared and is had the following advantages with air-operated hydraulic brake form: hydraulic tubing is totally-enclosed loop, can avoid the dust pollution fluid in atmosphere and reduce the reliability of brake system, drg is the fully enclosed, and friction lining is immersed in gear oil, good heat dissipation effect; Front-rear axle divides two-way braking, is independent of each other, and the reliability of brake system is high.Therefore, full power hydraulic brake system is used in construction machinery and equipment more and more.But its major defect of full power hydraulic brake system is on the market: the directional balance while 1, not considering car load braking, and the maneuverability of vehicle is not high; 2, between steering swivel system, brake system and actr three, there is no reasonable Arrangement scheme; 3, there is no complete full pipeline real-time monitoring system.
Summary of the invention
The problem existing for above-mentioned prior art, the invention provides a kind of industrial wheeled equipment complex control system that can effectively improve car load brake operation, reliability and directional balance.
To achieve these goals, the technical solution used in the present invention is: a kind of industrial wheeled equipment complex control system, comprises two-way prefill valve, the first energy storage, series connection treadle valve, braking taillight pressure switch, reducing valve, rear axle brake vi, parking brake, propons drg, parking alarm switch, the second energy storage, emergency braking step switch, low pressure warning switch, parking and emergency brake valve piece, by pass valve, duplex gear pump, steering pump and steering cylinder, described propons drg and rear axle brake vi adopt respectively two wet plate disc brakies, described parking brake is the disc type parking brake that normally closed brake application by spring hydraulic pressure discharges, duplex gear pump is connected respectively two-way prefill valve with steering pump, the oil outlet of duplex gear pump is connected with the P mouth of two-way prefill valve, the A1 mouth of two-way prefill valve and A2 mouth are connected in respectively P1 mouth and the P2 mouth of series connection treadle valve by pipeline, two-way prefill valve is connected with the first energy storage with on the pipeline of connecting between treadle valve, braking taillight pressure switch is connected between the series connection working hole A1 of treadle valve and the P mouth of reducing valve, reducing valve is connected between the series connection A1 mouth of treadle valve and rear axle brake vi and the P mouth of reducing valve is connected in rear axle brake vi, the working hole A2 of series connection treadle valve is connected with propons drg, parking alarm switch, the second energy storage, emergency braking step switch and low pressure warning switch are connected with SW3 mouth, A mouth, SW2 mouth and the SW1 mouth of parking emergency brake valve piece respectively, the pressure B mouth of emergency brake valve piece is connected in disc type parking brake, by pass valve is connected in parallel between the oil outlet and system circuit of duplex gear pump, and steering cylinder is connected with the working hole of steering pump.
Preferably, described the first energy storage parameter is 2.5L, 50Bar; Described the second energy storage parameter is 1.0L, 50Bar.
The invention has the beneficial effects as follows: adopt hydraulic efficiency pressure system as propulsion source, system pressure is high, and the lock torque of generation is large, and element requisite space is little, and response time is short, sluggish little; Adopt energy storage and double-circuit system, guaranteed car brakeing safety and reliability.Adopt oil-immersed multi-disk brake and plate disc brake to combine, solved preferably and relied on that the HM Hydraulic Motor radiating effect that hydraulic braking causes is poor, friction lining shorter problem in service life completely.Car load brake operation, reliability and directional balance have effectively been improved; Pedal force is directly proportional to brake-pressure, is swift in response, and pedal is experienced nature.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
In figure: 1, two-way prefill valve, the 2, first energy storage, 3, series connection treadle valve, 4, braking taillight pressure switch, 5, reducing valve, 6, rear axle brake vi, 7, parking brake, 8, propons drg, 9, parking alarm switch, 10, the second energy storage, 11, emergency braking step switch, 12, low pressure warning switch, 13, parking and emergency brake valve piece, 14, by pass valve, 15, duplex gear pump, 16, steering pump, 17, steering cylinder.
The specific embodiment
Below in conjunction with accompanying drawing, the invention will be further described.
As shown in Figure 1: the present invention includes two-way prefill valve 1, the first energy storage 2, series connection treadle valve 3, braking taillight pressure switch 4, reducing valve 5, rear axle brake vi 6, parking brake 7, propons drg 8, parking alarm switch 9, the second energy storage 10, emergency braking step switch 11, low pressure warning switch 12, parking and emergency brake valve piece 13, by pass valve 14, duplex gear pump 15, steering pump 16 and steering cylinder 17, duplex gear pump 15 is connected respectively two-way prefill valve 1 with steering pump 16, the oil outlet of duplex gear pump 15 is connected with the P mouth of two-way prefill valve 1, the A1 mouth of two-way prefill valve 1 and A2 mouth are connected in respectively P1 mouth and the P2 mouth of series connection treadle valve 3 by pipeline, two-way prefill valve 1 with on the pipeline of connecting between treadle valve 3, be connected with the first energy storage 2, braking taillight pressure switch 4 is connected between the series connection working hole A1 of treadle valve 3 and the P mouth of reducing valve 5, reducing valve 5 is connected between the series connection A1 mouth of treadle valve 3 and rear axle brake vi 6 and the P mouth of reducing valve 5 is connected in rear axle brake vi 6, the working hole A2 of series connection treadle valve 3 is connected with propons drg 8, parking alarm switch 9, the second energy storage 10, emergency braking step switch 11 and low pressure warning switch 12 are connected with SW3 mouth, A mouth, SW2 mouth and the SW1 mouth of parking emergency brake valve piece 13 respectively, the pressure B mouth of emergency brake valve piece 13 is connected in disc type parking brake 7, by pass valve 14 is connected in parallel between the oil outlet and system circuit of duplex gear pump 15, and steering cylinder 17 is connected with the working hole of steering pump 16.
Duplex gear pump 15 oil outlets are connected with the P mouth of two-way prefill valve 1, from the A1 mouth of two-way prefill valve 1 and A2 mouth pressure oil out, flow to respectively P1 mouth and the P2 mouth of series connection treadle valve 3, when stepping on series connection treadle valve 3, two-way braking liquid flows to respectively front-rear axle and makes bridge braking, wherein a road is through the series connection working hole A1 of treadle valve 3, flow to rear axle brake vi after the P mouth of reducing valve 5, and another road directly flows to propons drg from the working hole A2 of series connection treadle valve 3; In addition, through the pressure P mouth of SW mouth, parking and the emergency brake valve piece 13 of two-way prefill valve 1, then flow to from the pressure B mouth of emergency brake valve piece 13 emergency brake system that disc type parking brake 7 that the brake application by spring hydraulic pressure of back axle discharges forms.
Native system is by the independent fuel feeding of duplex gear pump 15, each alarm switch connects respectively warning indicator lamp, open machine power switch, if brake-pressure is lower than 100bar, braking low pressure alarming lamp is bright, after engine operation, duplex gear pump 15 is given the first energy storage 2 and the second energy storage 10 topping ups by two-way prefill valve 1, when energy storage pressure reaches 100bar when above, braking low pressure alarming removes and indicator lamp goes out, when reaching 120bar-165bar, energy storage pressure stops topping up, before machine walking, should make the electromagnetic valve energising in parking and emergency brake valve piece 13, hydraulic oil enters the parking brake 7 of back axle by electromagnetic valve, braking during standstill is removed.When stepping on series connection treadle valve 3, two-way braking liquid flows to respectively front-rear axle and makes bridge braking; When after brake action, energy storage pressure is lower than 120bar, energy storage continues topping up again.If because system breaks down, energy storage pressure is all the time lower than 100bar, parking checking fault, otherwise when pressure is during lower than 85bar, emergency braking step switch 11 is opened automatically, machine is at once in stopping brake state, during parking, press that hand brake switch makes to stop and emergency brake valve piece 13 in electromagnetic valve in off-position, the disc type parking brake spring reset that now the hydraulic oil resilience spring brake fluid pressure in back axle discharges holds out against, back axle braking, to realize the mechanical locking to whole driving system.The present invention, under the effect of series connection treadle valve 3, realizes front-rear axle synchronous braking; By controlling parking and emergency brake valve piece 13, realize braking during standstill.
In braking in a turn major loop, in the vehicle launch stage, two-way prefill valve 1 is to the first energy storage 2 and the second energy storage 10 feed flows.The fluid of working in accumulator reaches after set pressure, two-way prefill valve 1 connection steering pump 16 is that the O mouth of two-way prefill valve 1 is communicated with steering pump P mouth, the fluid that now duplex gear pump 15 provides can directly enter and turn to loop, by O mouth, to steering pump 16 fuel feeding, realizes the intensive fuel feeding of skid steer; Owing to equating from series connection treadle valve 3 working oil hydraulic coupling out, if two oil-immersed multi-disk brake maximum brake pressure of back axle and two oil-immersed multi-disk brake maximum brake pressure of propons are unequal, in order to meet two-way difference of pressure, in back axle pipeline, increase reducing valve 5, reached the reasonable distribution of front-rear axle lock torque.
Native system is opened 11 by braking taillight pressure switch 4 and emergency braking action and respectively industrial wheeled equipment service brake action and braking during standstill action is monitored in real time, and the use of parking alarm switch 9 and low pressure warning switch 12, can realize parking state is carried out to all the period of time monitoring, guarantee vehicle parking safety; In native system, bear the parking brake 7 of braking during standstill for the disc type parking brake that normally closed brake application by spring hydraulic pressure discharges, be positioned at back axle power intake; Its axially and radial dimension little, braking liquid is heated that the chance of vaporization is less, good, the braking effect of resistance to elevated temperatures is stablized during high load capacity.
Claims (2)
1. an industrial wheeled equipment complex control system, it is characterized in that comprising two-way prefill valve (1), the first energy storage (2), series connection treadle valve (3), braking taillight pressure switch (4), reducing valve (5), rear axle brake vi (6), parking brake (7), propons drg (8), parking alarm switch (9), the second energy storage (10), emergency braking step switch (11), low pressure warning switch (12), stop and emergency brake valve piece (13), by pass valve (14), duplex gear pump (15), steering pump (16) and steering cylinder (17), described propons drg (8) and rear axle brake vi (6) adopt respectively two wet plate disc brakies, described parking brake (7) is the disc type parking brake that normally closed brake application by spring hydraulic pressure discharges, duplex gear pump (15) is connected respectively two-way prefill valve (1) with steering pump (16), the oil outlet of duplex gear pump (15) is connected with the P mouth of two-way prefill valve (1), the A1 mouth of two-way prefill valve (1) and A2 mouth are connected in respectively P1 mouth and the P2 mouth of series connection treadle valve (3) by pipeline, on pipeline between two-way prefill valve (1) and the treadle valve of connecting (3), be connected with the first energy storage (2), braking taillight pressure switch (4) is connected between the A1 mouth and the P mouth of reducing valve (5) of series connection treadle valve (3), reducing valve (5) is connected between the A1 mouth of series connection treadle valve (3) and rear axle brake vi (6) and the A mouth of reducing valve (5) is connected in rear axle brake vi (6), the A2 mouth of series connection treadle valve (3) is connected with propons drg (8), parking alarm switch (9), the second energy storage (10), emergency braking step switch (11) and low pressure warning switch (12) are connected with SW3 mouth, A mouth, SW2 mouth and the SW1 mouth of parking emergency brake valve piece (13) respectively, the pressure B mouth of emergency brake valve piece (13) is connected in disc type parking brake (7), by pass valve (14) is connected in parallel between the oil outlet and system circuit of duplex gear pump (15), and steering cylinder (17) is connected with the working hole of steering pump (16).
2. a kind of industrial wheeled equipment complex control system according to claim 1, is characterized in that described the first energy storage (2) parameter is 2.5L, 50Bar; Described the second energy storage (10) parameter is 1.0L, 50Bar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201210293908.7A CN102785652B (en) | 2012-08-17 | 2012-08-17 | Integrated control system of wheel type engineering machine |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210293908.7A CN102785652B (en) | 2012-08-17 | 2012-08-17 | Integrated control system of wheel type engineering machine |
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| CN102785652A CN102785652A (en) | 2012-11-21 |
| CN102785652B true CN102785652B (en) | 2014-07-16 |
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| CN201210293908.7A Active CN102785652B (en) | 2012-08-17 | 2012-08-17 | Integrated control system of wheel type engineering machine |
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| CN103061903A (en) * | 2012-12-25 | 2013-04-24 | 三一重机有限公司 | System and method for emergent shutdown |
| CN106143456A (en) * | 2016-08-30 | 2016-11-23 | 安徽合力股份有限公司 | The brakes of large-tonnage storage battery forktruck |
| CN107161129A (en) * | 2017-05-31 | 2017-09-15 | 徐州徐工挖掘机械有限公司 | A kind of novel high speed wheeled excavating brake system |
| CN109944835B (en) * | 2019-04-02 | 2024-04-23 | 重庆平山机电设备有限公司 | Hydraulic system of drilling machine and drilling machine |
| CN110541856B (en) * | 2019-08-23 | 2024-05-10 | 安徽合力股份有限公司 | Unmanned automatic control's fork truck braking hydraulic system |
| CN110778540B (en) * | 2019-11-26 | 2021-08-06 | 三一汽车制造有限公司 | Paver hydraulic system and paver |
| CN111469825B (en) * | 2020-04-07 | 2021-07-06 | 中国煤炭科工集团太原研究院有限公司 | Full-hydraulic braking efficiency sequential distribution system of mining rubber-tyred vehicle |
| CN111717035A (en) * | 2020-06-23 | 2020-09-29 | 徐工集团工程机械股份有限公司科技分公司 | Braking system and braking method for super-tonnage electric transmission loader |
| CN114056297B (en) * | 2022-01-12 | 2022-04-12 | 中车戚墅堰机车车辆工艺研究所有限公司 | Hydraulic brake control system for vehicle |
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| CN201923203U (en) * | 2010-12-01 | 2011-08-10 | 泸州长起特种起重设备有限公司 | Hydraulic steering and brake circuit for two-bridge engineering machinery |
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| DE102011008707A1 (en) * | 2011-01-17 | 2012-07-19 | Linde Material Handling Gmbh | Mobile working machine, particularly industrial truck, comprise combustion engine driven drive system and parking brake unit, which is formed as hydraulically detachable spring-loaded brake |
| CN202764956U (en) * | 2012-08-17 | 2013-03-06 | 徐州徐工铁路装备有限公司 | Wheel type engineering machinery integrated control system |
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| JPWO2006030783A1 (en) * | 2004-09-15 | 2008-05-15 | 株式会社小松製作所 | Control device for input clutch of work vehicle |
| JP5304236B2 (en) * | 2008-12-26 | 2013-10-02 | コベルコ建機株式会社 | Swivel brake device for construction machinery |
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| CN201923203U (en) * | 2010-12-01 | 2011-08-10 | 泸州长起特种起重设备有限公司 | Hydraulic steering and brake circuit for two-bridge engineering machinery |
| DE102011008707A1 (en) * | 2011-01-17 | 2012-07-19 | Linde Material Handling Gmbh | Mobile working machine, particularly industrial truck, comprise combustion engine driven drive system and parking brake unit, which is formed as hydraulically detachable spring-loaded brake |
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