CN204821529U - Full hydraulic braking and fan -driving system - Google Patents
Full hydraulic braking and fan -driving system Download PDFInfo
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- CN204821529U CN204821529U CN201520358911.1U CN201520358911U CN204821529U CN 204821529 U CN204821529 U CN 204821529U CN 201520358911 U CN201520358911 U CN 201520358911U CN 204821529 U CN204821529 U CN 204821529U
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Abstract
The utility model discloses a full hydraulic braking and fan -driving system, including oil tank (1), time oil filter (2), radiator (6), fan motor (7), reversal valve (8), rim brake (9), brake valve (10), energy storage ware (11) and parking brake (12), still include variable pump (3), control valve (4) and prefill valve (13). Be less than a certain value X1 when full hydraulic braking system pressure, the control valve is given to a prefill valve feedback signal, the control valve under this signal control, to variable pump feedback signal increase variable pumping flow, the resistance of the drive of the increase flow direction simultaneously fan system. Reach a certain value X2 (X2 > X1) until full hydraulic braking system pressure, prefill valve feedback signal to control valve, control valve are according to drive fan system feedback's signal, and output signal to variable pump makes the variable pump provide the flow according to drive fan system requirements.
Description
Technical field
The utility model relates to a kind of Full-hydraulic braking apparatus and fan drive system, is applicable to all kinds of construction machinery and equipment.
Background technology
Full power hydraulic brake system and the fans drive hydraulic efficiency pressure system of current construction machinery and equipment are separate, but the brake pump of full power hydraulic brake system works in whole working discontinuous, be not fully used, waste energy, and two cover system independent, add number of elements undoubtedly, add cost, system layout and pipeline connection also all complicate.Therefore, a kind of full power hydraulic brake system and fans drive hydraulic efficiency pressure system of energy common elements resource is urgently developed.
Summary of the invention
For above-mentioned existing technical matters, the utility model provides a kind of Full-hydraulic braking apparatus and fan drive system, by sharing a controllable capacity pump, makes full use of the flow of this pump, with the object reaching simplification system, saved energy, reduced system cost.
For achieving the above object, the utility model provides a kind of Full-hydraulic braking apparatus and fan drive system, comprises fuel tank, return filter, radiator, fan motor, reversible valve, rim brake, brake activation valve, energy storage and Parking Brake; Described fan motor connects fuel tank by hydraulic fluid port TM, connects reversible valve by hydraulic fluid port A1, hydraulic fluid port A2; Reversible valve connects radiator by hydraulic fluid port TA, and radiator connects return filter by hydraulic fluid port AF, and return filter connects fuel tank by hydraulic fluid port BF.Overlap independently Full-hydraulic braking apparatus and fan drive system to merge two, the utility model also comprises controllable capacity pump, control cock and prefill valve; Described controllable capacity pump connects fuel tank by hydraulic fluid port TP, hydraulic fluid port XP, simultaneously by hydraulic fluid port P, hydraulic fluid port LS connection control valve; Described control cock connects prefill valve by hydraulic fluid port PB, hydraulic fluid port LSB, connects reversible valve by hydraulic fluid port PA, connects fuel tank by hydraulic fluid port T simultaneously; Described prefill valve all connects brake activation valve and energy storage by hydraulic fluid port BR1, hydraulic fluid port BR2, connects Parking Brake by hydraulic fluid port BR3, connects fuel tank by hydraulic fluid port TB simultaneously; Described brake activation valve connects rim brake by hydraulic fluid port B1, hydraulic fluid port B2, connects fuel tank by hydraulic fluid port TB1, hydraulic fluid port TB2 simultaneously.
The utility model controllable capacity pump preferentially gives full power hydraulic brake system topping up, controllable capacity pump remaining flow supply fan drive system.Concrete principle is, when full power hydraulic brake system pressure lower than a certain value X1(and brake system energy storage pressure lower than a certain value X1), prefill valve feeds back a signal to control cock, control cock is under this signal control, increase controllable capacity pump flow to controllable capacity pump feedback signal, increase the resistance flowing to drive fan system simultaneously.Until full power hydraulic brake system pressure reaches a certain value X2(and brake system energy storage pressure reaches a certain value X2, X2 > X1), prefill valve feedback signal is to control cock, control cock is according to the signal of drive fan system feedback, output signal to controllable capacity pump, make controllable capacity pump provide flow according to drive fan system requirements.
Further, in described prefill valve, hydraulic fluid port PB connects hydraulic fluid port BR1, hydraulic fluid port BR2 respectively by cutoff port II, check valve IV, lock valve successively, and cutoff port II connects hydraulic fluid port LSB through valve VIII respectively; Hydraulic fluid port BR1, hydraulic fluid port BR2 connect hydraulic fluid port BR3 through lock valve, check valve I, valve I respectively, and valve I is connected hydraulic fluid port TB respectively with valve VIII.
Further, in described control cock, hydraulic fluid port P connects hydraulic fluid port PB by reducing valve; Hydraulic fluid port P connects hydraulic fluid port T by cutoff port I, electric proportional pressure control valve; Hydraulic fluid port LSB is by control chamber VI, the shuttle valve connection hydraulic fluid port LS of valve VII, and cutoff port I also connects hydraulic fluid port LS by shuttle valve.
Further, in described reversible valve, hydraulic fluid port PA connects hydraulic fluid port A2 by valve II, valve III, and hydraulic fluid port A1 connects hydraulic fluid port TA by valve IV; Hydraulic fluid port PA connects hydraulic fluid port A1 by valve II, valve IV, and hydraulic fluid port A2 connects hydraulic fluid port TA by valve III; Hydraulic fluid port A1, hydraulic fluid port A2 are interconnected respectively by check valve II, check valve III, and check valve II two ends safety valve VI in parallel, check valve III two ends safety valve V in parallel.
Further, described radiator is also by hydraulic fluid port TA, a hydraulic fluid port AF bypass disc in parallel.When radiator blocks, TA mouth fluid, through bypass disc inflow filter, flows back to fuel tank.
To sum up, the utility model full power hydraulic brake system and fan drive system share a controllable capacity pump, utilize control cock to control controllable capacity pump, and coordinate variable batch (-type) prefill valve, automatic dispense flow rate is to full power hydraulic brake system and fan drive system.With existing Full-hydraulic braking apparatus compared with fans drive hydraulic efficiency pressure system technology, the utility model decreases the idle cycle loss of brake pump, has very high energy-saving benefit, decreases system element quantity, simplify system, reduce cost.
Accompanying drawing explanation
Fig. 1 is the fix-displacement pump speed-regulating hydraulic systematic schematic diagram that construction machinery and equipment uses;
In figure: 1, fuel tank, 2, return filter, 3, controllable capacity pump, 4, control cock, 5, bypass disc, 6, radiator, 7, fan motor, 8, reversible valve, 9, rim brake, 10, brake activation valve, 11, energy storage, 12, Parking Brake, 13, prefill valve, 14, check valve I, 15, valve I, 16, valve I control end, 17, lock valve, 20, control chamber I, 21, control chamber II, 22, control chamber III, 23, valve II, 24, valve III, 25, valve IV, 26, valve II control end, 27, control chamber IV, 28, control chamber V, 29, safety valve V, 30, safety valve VI, 31, check valve II, 32, check valve III, 33, reducing valve, 34, cutoff port I, 35, electricity proportional pressure control valve, 36, electricity proportional pressure control valve control end, 37, shuttle valve, 38, control chamber VI, 39, valve VII, 40, cutoff port II, 41, check valve IV, 42, valve VIII, 44, control chamber VII, 45, control chamber VIII.
Detailed description of the invention
Below in conjunction with accompanying drawing, the utility model is described in further detail.
As shown in Figure 1, Full-hydraulic braking apparatus of the present utility model and fans drive hydraulic efficiency pressure system comprise fuel tank 1, return filter 2, controllable capacity pump 3, control cock 4, bypass disc 5, radiator 6, fan motor 7, reversible valve 8, rim brake 9, brake activation valve 10, energy storage 11, Parking Brake 12 and prefill valve 13.
Wherein: controllable capacity pump 3 is connected by hydraulic fluid port TP, hydraulic fluid port XP with fuel tank 1, controllable capacity pump 3 is connected by hydraulic fluid port P, hydraulic fluid port LS with control cock 4; Control cock 4 is connected by hydraulic fluid port PB, hydraulic fluid port LSB with prefill valve 13, is connected by hydraulic fluid port T with fuel tank 1 simultaneously, is connected with reversible valve 8 by hydraulic fluid port PA; Prefill valve 13 is all connected with brake activation valve 10, energy storage 11 respectively by hydraulic fluid port BR1, hydraulic fluid port BR2, is connected by hydraulic fluid port BR3 with Parking Brake 12 simultaneously, is connected with fuel tank 1 by hydraulic fluid port TB; Brake activation valve 10 is connected with rim brake 9 by hydraulic fluid port B1, hydraulic fluid port B2, and brake activation valve 10 is connected with fuel tank 1 by hydraulic fluid port TB1, hydraulic fluid port TB2 simultaneously; Reversible valve 8 is connected by hydraulic fluid port A1, hydraulic fluid port A2 with fan motor 7, is connected by hydraulic fluid port TA with radiator 6, bypass disc 5 simultaneously; Fan motor 7 is connected with fuel tank 1 by hydraulic fluid port TM; Bypass disc 5 is connected with return filter 2 by hydraulic fluid port AF with radiator 6; Return filter 2 is connected with fuel tank 1 by hydraulic fluid port BF.
Thus, Full-hydraulic braking apparatus and fans drive hydraulic efficiency pressure system share a controllable capacity pump 3, and this controllable capacity pump 3 preferentially gives full power hydraulic brake system topping up, remaining flow supply fan drive system.Concrete allocation flow is as follows: (1) is when the pressure of energy storage 11 is lower than a certain value X1, as X1=125bar, valve VIII 42 in prefill valve 13 is the work of right position under spring force, controllable capacity pump 3 exports the reducing valve 33 of fluid in control cock 4 and enters into prefill valve 13, by the cutoff port II 40 in prefill valve 13, check valve IV 41 and lock valve 17 to energy storage 11 topping up.Simultaneously by the pressure after cutoff port II 40, control chamber VII 44, control chamber VIII 45, control chamber VI 38 and shuttle valve 37 is passed to by valve VIII 42, a small amount of flow that controllable capacity pump 3 exports is by cutoff port I 34, electricity proportional pressure control valve 35 flows back to fuel tank, shuttle valve 37 is passed to by the pressure after cutoff port I 34, higher value in pressure from two directions is fed back to the LS mouth of controllable capacity pump 3 by shuttle valve 37, the flow of regulated variable pump 3.From the pressure signal of prefill valve LSB hydraulic fluid port, enter into the control chamber VI 38 of valve VII 39, increase the resistance that fluid enters reversible valve 8, so that fluid flows into brake system.
(2) along with the fluid flowing into energy storage 11 increases, pressure increase, valve VIII 42 constantly moves to right, and valve VII 39 constantly moves to left.When pressure increase is to (X2 > X1) during a certain value X2, as X2=160bar, the work of left position changed to by valve VIII 42, the pressure of control chamber VI 38, control chamber VII 44, control chamber VIII 45 flows back to fuel tank by valve VIII 42, the work of left position changed to by valve VII 39, brake system no longer needs topping up, controllable capacity pump 1 is only by Stress control after cutoff port I 34, to meet the demand of fan drive system, until when the pressure of energy storage 11 drops to again below 125bar, repeat the action in step (1) again, and so forth.The value of above-mentioned X1, X2 can set according to situation, as desirable X1=105bar, X2=140bar.
Visible, the utility model is in the process used, and electric proportional valve 35 to the fluid flowing through cutoff port I 34, forms different pressure under the effect of its control end 36, feeds back to controllable capacity pump 1 by shuttle valve 37, to meet the requirement of fan drive system.Reducing valve 33, by the adjustment of valve itself, controls the top pressure flowing into full power hydraulic brake system, protection full power hydraulic brake system.
When full power hydraulic brake system service brake, the Mechanical course end of brake activation valve 10, the fluid of energy storage 11 enters rim brake 9 by brake activation valve 10, implement braking, and by pressure feedback to control chamber I 20, control chamber II 21 and control chamber III 22, with balancing brake valve 10 spool position, according to the size of brake activation valve 10 Mechanical course end power, export the pressure that rim brake 9 is different to.When the manipulation of brake off valve 10, the fluid of rim brake 9 flows back to fuel tank by brake activation valve 10.
When full power hydraulic brake system braking during standstill, namely when the control end 16 of valve I 15 obtains electric, the fluid in energy storage 11 is by check valve I 14, valve I 15 flows into Parking Brake 12, implement braking, when control end 16 dead electricity of valve I 15, Parking Brake 12 fluid flows back to fuel tank by valve I 15.
When fan drive system works, the fluid flowed out from control cock 4 hydraulic fluid port PA enters reversible valve 8, when control end 26 dead electricity of valve II 23, valve II 23 is upper work under spring force, PA mouth fluid is by the control chamber V 28 of valve II 23 to valve III 24, promote valve III 24 and be in upper work, PA mouth fluid enters into the A2 mouth of fan motor 7 by valve III 24, the rotation of drive fan motor 7, and flow out from the A1 of fan motor 7, flow to the TA mouth of radiator 6 by valve IV 25, flow out from radiator TF mouth through cooling, flow back to fuel tank by filter 2.When the control end 26 of valve II 23 obtains electric, valve II 23 is the next work under control end 26 acts on, PA mouth fluid is by the control chamber IV 27 of valve II 23 to valve IV 25, promote valve IV 25 and be in the next work, PA mouth fluid enters into the A1 mouth of fan motor 7 by valve IV 25, drive fan motor 7 contrarotation, and flow out from the A2 mouth of fan motor 7, flow to the TA mouth of radiator 6 by valve III 24, flow out from radiator TF mouth through cooling, flow back to fuel tank by filter 2.
Further, when the A1 mouth oil pressure of fan motor 7 is excessive, by safety valve VI 30 off-load; When the A2 mouth oil pressure of fan motor 7 is excessive, by safety valve V 29 off-load; When the A1 mouth oil pressure of fan motor 7 is too low, by check valve II 31 repairing; When the A2 mouth oil pressure of fan motor 7 is too low, by check valve III 32 repairing.
Claims (5)
1. Full-hydraulic braking apparatus and a fan drive system, comprises fuel tank (1), return filter (2), radiator (6), fan motor (7), reversible valve (8), rim brake (9), brake activation valve (10), energy storage (11) and Parking Brake (12); Described fan motor (7) connects fuel tank (1) by hydraulic fluid port TM, connects reversible valve (8) by hydraulic fluid port A1, hydraulic fluid port A2; Reversible valve (8) connects radiator (6) by hydraulic fluid port TA, and radiator (6) connects return filter (2) by hydraulic fluid port AF, and return filter (2) connects fuel tank (1) by hydraulic fluid port BF;
It is characterized in that, also comprise controllable capacity pump (3), control cock (4) and prefill valve (13); Described controllable capacity pump (3) connects fuel tank (1) by hydraulic fluid port TP, hydraulic fluid port XP, simultaneously by hydraulic fluid port P, hydraulic fluid port LS connection control valve (4); Described control cock (4) connects prefill valve (13) by hydraulic fluid port PB, hydraulic fluid port LSB, connects reversible valve (8) by hydraulic fluid port PA, connects fuel tank (1) by hydraulic fluid port T simultaneously; Described prefill valve (13) all connects brake activation valve (10) and energy storage (11) by hydraulic fluid port BR1, hydraulic fluid port BR2, connects Parking Brake (12) by hydraulic fluid port BR3, connects fuel tank (1) by hydraulic fluid port TB simultaneously; Described brake activation valve (10) connects rim brake (9) by hydraulic fluid port B1, hydraulic fluid port B2, connects fuel tank (1) by hydraulic fluid port TB1, hydraulic fluid port TB2 simultaneously.
2. a kind of Full-hydraulic braking apparatus according to claim 1 and fan drive system, it is characterized in that, in described prefill valve (13), hydraulic fluid port PB connects hydraulic fluid port BR1, hydraulic fluid port BR2 respectively by cutoff port II (40), check valve IV (41), lock valve (17) successively, and cutoff port II (40) connects hydraulic fluid port LSB through valve VIII (42) respectively; Hydraulic fluid port BR1, hydraulic fluid port BR2 connect hydraulic fluid port BR3 through lock valve (17), check valve I (14), valve I (15) respectively, and valve I (15) is connected hydraulic fluid port TB respectively with valve VIII (42).
3. a kind of Full-hydraulic braking apparatus according to claim 1 and fan drive system, is characterized in that, in described control cock (4), hydraulic fluid port P connects hydraulic fluid port PB by reducing valve (33); Hydraulic fluid port P connects hydraulic fluid port T by cutoff port I (34), electric proportional pressure control valve (35); Hydraulic fluid port LSB is by control chamber VI (38), shuttle valve (37) the connection hydraulic fluid port LS of valve VII (39), and cutoff port I (34) also connects hydraulic fluid port LS by shuttle valve (37).
4. a kind of Full-hydraulic braking apparatus according to claim 1 and fan drive system, is characterized in that, in described reversible valve (8), hydraulic fluid port PA connects hydraulic fluid port A2 by valve II (23), valve III (24), and hydraulic fluid port A1 connects hydraulic fluid port TA by valve IV (25); Hydraulic fluid port PA connects hydraulic fluid port A1 by valve II (23), valve IV (25), and hydraulic fluid port A2 connects hydraulic fluid port TA by valve III (24); Hydraulic fluid port A1, hydraulic fluid port A2 are interconnected respectively by check valve II (31), check valve III (32), and check valve II (31) two ends safety valve VI (30) in parallel, check valve III (32) two ends safety valve V (29) in parallel.
5. according to described a kind of Full-hydraulic braking apparatus arbitrary in claim 1-4 and fan drive system, it is characterized in that, described radiator (6) is also by hydraulic fluid port TA, a hydraulic fluid port AF bypass disc (5) in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520358911.1U CN204821529U (en) | 2015-05-29 | 2015-05-29 | Full hydraulic braking and fan -driving system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520358911.1U CN204821529U (en) | 2015-05-29 | 2015-05-29 | Full hydraulic braking and fan -driving system |
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| CN204821529U true CN204821529U (en) | 2015-12-02 |
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| CN201520358911.1U Active CN204821529U (en) | 2015-05-29 | 2015-05-29 | Full hydraulic braking and fan -driving system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104960513A (en) * | 2015-05-29 | 2015-10-07 | 徐工集团工程机械股份有限公司科技分公司 | Full hydraulic braking and fan driving system |
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2015
- 2015-05-29 CN CN201520358911.1U patent/CN204821529U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104960513A (en) * | 2015-05-29 | 2015-10-07 | 徐工集团工程机械股份有限公司科技分公司 | Full hydraulic braking and fan driving system |
| CN104960513B (en) * | 2015-05-29 | 2017-11-14 | 徐工集团工程机械股份有限公司科技分公司 | A kind of Full-hydraulic braking apparatus and fan drive system |
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