CN104929170A - Movable-arm-lifting energy conservation system for loader - Google Patents
Movable-arm-lifting energy conservation system for loader Download PDFInfo
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- CN104929170A CN104929170A CN201510278844.7A CN201510278844A CN104929170A CN 104929170 A CN104929170 A CN 104929170A CN 201510278844 A CN201510278844 A CN 201510278844A CN 104929170 A CN104929170 A CN 104929170A
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Abstract
The invention discloses a movable-arm-lifting energy conservation system for a loader. The system comprises an oil way system and a circuit system, wherein the oil way system comprises a throttle valve, an oil tank, a working pump, a multi-way valve and a tipping cylinder; the circuit system comprises a magnetic valve, a pressure relay, a proximity switch and a power supply; and the magnetic valve is connected between the F port and the G port of the multi-way valve, a small cavity of the tipping cylinder is directly connected with the oil tank through reversing of the magnetic valve, so that oil return is realized and overflowing caused by compression of the small cavity of the tipping cylinder is eliminated. According to the system, when an unloading and limiting block of a bucket is attached to a movable arm, the movable arm is allowed to be lifted continuously, so that the small cavity can overflow successfully, that is, the tipping cylinder can extend automatically and successfully, the resistance caused by automatic extension of the tipping cylinder during lifting of the movable arm is reduced; and at the same time, the calorific value of a hydraulic system and the energy consumption are reduced. Accordingly, the movable arm can be lifted when the bucket is located in any position, and the flexibility of the whole machine and the work adaptation are improved.
Description
Technical field
The present invention relates to a kind of loader, specifically a kind of loader lifting swing arm energy conserving system.
Background technology
During loader discharging, generally needing lifting swing arm to higher position (or extreme higher position), then carry out discharging, in order to ensure that material can unload totally, during discharging, generally all scraper bowl discharging being attached on swing arm to scraper bowl unloading limited block.After discharging, driver first receives bucket often and turns over to scraper bowl, and tipping bucket cylinder extends, operator plate to scraper bowl exceedes the height of swing arm or receives the position of bucket to discharging, and then fall back complete machine, then the swing arm that lands, carry out next cycle shovel and pretend industry, and do not allow direct lifting swing arm.If after high-order discharging, do not carry out the operation of receipts bucket and directly lifting swing arm time, due to the movement properties of six bar mechanism, the trend making scraper bowl have moving arm to rotate, the pressure of scraper bowl unloading limited block to swing arm plate has the trend of increase, because unloading limited block has been attached on swing arm, therefore, scraper bowl just cannot rotate by moving arm, whole mechanism can respond the lifting of swing arm by the elongation action of tipping bucket cylinder, and the valve core of multiway valve controlling tipping bucket cylinder elongation action is not opened, for the loader of non-pilot control, namely directly valve core of multiway valve is controlled by pilot control handle, control the commutation of working connection.Because there is repairing one way valve in the large chamber of tipping bucket cylinder, and loculus has loculus overflow valve, therefore there will be, the automatic repairing in the large chamber of tipping bucket cylinder, to respond the automatic elongation of tipping bucket cylinder, and loculus be compressed rear pressure increase to loculus overflow valve open realize oil return.The overflow of tipping bucket cylinder loculus can produce larger resistance, namely has larger resistance during lifting swing arm, and while consumption relatively high power, hydraulic oil also can be made to generate heat, and therefore this is unallowed in practice.Moved arm lifting higher, tipping bucket cylinder loculus is more by overflow valve spillway discharge, and hydraulic oil calorific value is larger, and the power consumption of generation is also larger.Thus more power can be wasted, oil consumption is higher, and fuel economy is poor.In order to saving power, reduce fuel consume etc., generally do not allow at this moment directly lifting swing arm, namely common loader is not that scraper bowl can direct lifting swing arm when free position, and the operation flexibility of complete machine is restricted.
The movement properties of loader six bar mechanism causes tipping bucket cylinder loculus by overflow valve overflow, cause comparatively macro-energy loss, thus become a defect of conventional load machine, namely do not allow to be attached to (swing arm is not now in extreme higher position) after on swing arm at unloading limited block, then continue lifting swing arm.Therefore, the operating flexibility of loader and mode of operation can be restricted.
But consider from the angle of reality, when client operates complete machine, a tractor serves several purposes often, the operating mode of operation greatly, and often according to specific operating mode, carry out selected suitable mode of operation, when driver promotes swing arm at this moment because mode of operation needs, just cause larger power consumption.The oil consumption that each working cycles is caused is higher.
Summary of the invention
For above-mentioned prior art Problems existing, the invention provides a kind of loader lifting swing arm energy conserving system, save energy and increase the flexibility of complete machine, by the overflow of tipping bucket cylinder loculus during elimination lifting swing arm, reduce energy ezpenditure, reduce the heating of fluid simultaneously, increase complete machine flexibility and complete machine compliance.
To achieve these goals, a kind of loader lifting of the present invention swing arm energy conserving system, comprises oil piping system and Circuits System; Described oil piping system comprises choke valve, fuel tank, working barrel, banked direction control valves and tipping bucket cylinder; The oil-out of fuel tank connects the oil-in of working barrel; The oil-out of working barrel connects the P mouth of banked direction control valves, the A mouth of banked direction control valves connects the large chamber of tipping bucket cylinder, the B mouth of banked direction control valves connects the large chamber of left swing arm cylinder and right swing arm cylinder simultaneously, the C mouth of banked direction control valves connects the loculus of left swing arm cylinder and right swing arm cylinder simultaneously, the D mouth of banked direction control valves connects the loculus of tipping bucket cylinder, T mouth one tunnel of banked direction control valves connects the oil-in of hydraulic oil radiator, and another road connects the oil-in of choke valve, the oil-in of the oil-out of the oil-out of hydraulic oil radiator and choke valve connected tank simultaneously;
Described Circuits System comprises electromagnetic valve, pressure switch, proximity switch and power supply; The positive pole of power supply connects a port of proximity switch, and the b port of proximity switch connects the e port of pressure switch, and the f port of pressure switch connects the entrance point of electromagnetic valve, the negative pole of the outlet termination power of electromagnetic valve; The E mouth of banked direction control valves connects the hydraulic fluid port end of pressure switch, and the F mouth of banked direction control valves connects the Y mouth of electromagnetic valve, and the G mouth of banked direction control valves connects the Z mouth of electromagnetic valve; When proximity switch and pressure switch respond simultaneously, electromagnetic valve commutates, and makes the direct oil sump tank of the hydraulic oil of the loculus of tipping bucket cylinder.
As further scheme of the present invention, the oil-out of described fuel tank connects the oil-in of coarse filter, and the oil-out of coarse filter connects the oil-in of working barrel.Because general strainer can block, carry out alternative general strainer with coarse filter.
As further scheme of the present invention, the oil-out of described hydraulic oil radiator and the oil-out of choke valve connect the oil-in of fine filter simultaneously, the oil-in of the oil-out connected tank of fine filter.Adopt fine filter to improve oil cleanliness further at fuel tank oil-in place.
As a kind of scheme of the present invention, banked direction control valves comprises the first one way valve, large chamber overflow valve, work overflow valve, the first reversal valve, the 3rd one way valve, loculus overflow valve, the 4th one way valve and the second reversal valve; The P mouth first via of banked direction control valves connects the oil-in of work overflow valve, and the second tunnel connects the oil-in of the second one way valve, and the 3rd tunnel connects the A3 mouth of the first reversal valve, and the oil-out of work overflow valve connects T mouth; The oil-out of the second one way valve connects the A1 mouth of the first reversal valve, and the A2 mouth of the first reversal valve connects T mouth; The B1 mouth first via of the first reversal valve connects D mouth and F mouth simultaneously, and the second tunnel connects the oil-in of loculus overflow valve; B2 mouth one tunnel of the first reversal valve connects A mouth, the oil-in of Jie great chamber, another road overflow valve; The B3 mouth first via of the first reversal valve connects the C3 mouth of the second reversal valve, and the second tunnel connects the oil-in of the 4th one way valve, and the 3rd tunnel connects E mouth; The oil-out of the 4th one way valve connects the C1 mouth of the second reversal valve, and the C2 mouth of the second reversal valve and D3 mouth connect T mouth simultaneously, and the D1 mouth of the second reversal valve connects C mouth, and D2 mouth connects B mouth; The oil-in of loculus overflow valve connects the oil-out of the 3rd one way valve, and the oil-out of loculus overflow valve and the oil-in of the 3rd one way valve connect G mouth and T mouth simultaneously; The oil-in of large chamber overflow valve connects the oil-out of the first one way valve, and the oil-out of large chamber overflow valve and the oil-in of the first one way valve connect T mouth simultaneously.
Compared with prior art beneficial effect of the present invention is: 1. cost is low.Whole energy conserving system, on the hydraulic system of working of common loader, only additionally increases the cost of power supply, proximity switch, pressure switch, electromagnetic valve and relevant tube circuit, the cost compare hundreds thousand of with loader, and the cost of increase is very little.
2. electrichydraulic control makes the sensitivity of whole energy conserving system very high.Unloading limited block is attached to after on swing arm, and proximity switch is connected rapidly, and during lifting swing arm, pressure switch responds rapidly, thus electromagnetic valve is commutated rapidly, and tipping bucket cylinder extends smoothly, the smooth oil sump tank of loculus.Electrical equipment and hydraulic control make being swift in response of whole system, and sensitivity is very high.
3. the principle of whole energy conserving system is simple, and fault is easily discharged.On the hydraulic system of working of common loader, increase little part, therefore principle easy understand, break down than being easier to judgement, attendant's maintenance conditions is convenient, and maintenance cost is lower, once break down, can get rid of fast.
4. good energy saving performance.Due to tipping bucket cylinder loculus by compression after, pressure increase so that overflow, can produce larger resistance, and therefore during lifting swing arm, complete machine needs to consume extra power to overcome above-mentioned phenomenon.And loader lifting swing arm energy conserving system of the present invention just overcomes above-mentioned phenomenon from design, therefore save engine power, decreased the calorific value of hydraulic oil, saved fuel consume and energy.
5. the flexibility of complete machine is better, and compliance is more extensive.Energy conserving system of the present invention, after high-order discharging, allows complete machine under the prerequisite not receiving bucket, direct lifting swing arm, and tipping bucket cylinder can realize extending smoothly.Therefore, energy conserving system of the present invention adds the flexibility of equipment, and compliance strengthens further, and function is more perfect.After allowing arbitrarily angled discharging, namely no matter where scraper bowl is in, and all allows direct lifting swing arm.
6. be easily embodied as the supporting application of complete machine.The domestic manufacturing technology of the associated parts such as electromagnetic valve, pressure switch and proximity switch is ripe, easy to process, easily manufacture, thus is easily main frame manufacturer and adopts.
7. this system is easy to be promoted.Whole system due to the cost that electromagnetic valve is easy to process, system additionally increases very little, fault easily judges, the sensitivity of system is very high, and better adaptability, and this system is easily adopted by popularization.
8. tipping bucket cylinder loculus of the present invention adopts the commutate mode of direct oil return of electromagnetic valve to carry out pressure release, and when reducing lifting swing arm, the energy loss that overflow brings, reduces the heating of hydraulic system simultaneously, thus realizes the energy-conservation of system.
9. the present invention is connected by proximity switch and pressure switch the commutation of Controlling solenoid valve, and both must work simultaneously, and circuit could be connected, and just can embody energy-conserving action.When unloading lifting swing arm when limited block leaves swing arm; Or limited block is attached on swing arm, and during driver's not lifting swing arm, circuit all can not be connected, and energy conserving system just can not work, and now the hydraulic system of energy conserving system and common loader is completely equivalent.Therefore, the energy conserving system that the present invention is just worked under special circumstances, during normal work and common loader just the same.
Accompanying drawing explanation
Fig. 1 is control system schematic diagram of the present invention;
Fig. 2 is the schematic diagram of banked direction control valves in Fig. 1;
Fig. 3 is attached to after on swing arm for unloading limited block, energy conserving system work sheet during lifting swing arm;
In figure: 1, hydraulic oil radiator; 2, fine filter; 3, choke valve; 4, fuel tank; 5, coarse filter; 6, working barrel; 7, banked direction control valves; 8, electromagnetic valve; 9, pressure switch; 10, proximity switch; 11, power supply; 12, right swing arm cylinder; 13, left swing arm cylinder; 14, tipping bucket cylinder; 15, the first one way valve; 16, large chamber overflow valve; 17, work overflow valve; 18, the first reversal valve; 19, the second one way valve; 20, the 3rd one way valve; 21, loculus overflow valve; 22, the 4th one way valve; 23, the second reversal valve.
Detailed description of the invention
In order to make those skilled in the art person understand the present invention program better, below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
As shown in Figure 1, loader lifting swing arm energy conserving system of the present invention, comprises oil piping system and Circuits System; Oil piping system comprises choke valve 3, fuel tank 4, working barrel 6, banked direction control valves 7 and tipping bucket cylinder 14; The oil-out of fuel tank 4 connects the oil-in of working barrel 6; The oil-out of working barrel 6 connects the P mouth of banked direction control valves 7, the A mouth of banked direction control valves 7 connects the large chamber of tipping bucket cylinder 14, the B mouth of banked direction control valves 7 connects the large chamber of left swing arm cylinder 13 and right swing arm cylinder 12 simultaneously, the C mouth of banked direction control valves 7 connects the loculus of left swing arm cylinder 13 and right swing arm cylinder 12 simultaneously, the D mouth of banked direction control valves 7 connects the loculus of tipping bucket cylinder 14, T mouth one tunnel of banked direction control valves 7 connects the oil-in of hydraulic oil radiator 1, another road connects the oil-in of choke valve 3, the oil-in of the oil-out of the oil-out of hydraulic oil radiator 1 and choke valve 3 connected tank 4 simultaneously;
Circuits System comprises electromagnetic valve 8, pressure switch 9, proximity switch 10 and power supply 11; The positive pole of power supply 11 connects a port of proximity switch 10, and the b port of proximity switch 10 connects the e port of pressure switch 9, and the f port of pressure switch 9 connects the entrance point of electromagnetic valve 8, the negative pole of the outlet termination power 11 of electromagnetic valve 8; The E mouth of banked direction control valves 7 connects the hydraulic fluid port end of pressure switch 9, and the F mouth of banked direction control valves 7 connects the Y mouth of electromagnetic valve 8, and the G mouth of banked direction control valves 7 connects the Z mouth of electromagnetic valve 8; When proximity switch 10 and pressure switch 9 respond simultaneously, electromagnetic valve 8 commutates, and makes the direct oil sump tank 4 of the hydraulic oil of the loculus of tipping bucket cylinder 14.
On said structure basis, the present invention also connects the oil-in of coarse filter 5 at the oil-out of fuel tank 4, and the oil-out of coarse filter 5 connects the oil-in of working barrel 6.Also connect the oil-in of fine filter 2 at the oil-out of hydraulic oil radiator 1 and the oil-out of choke valve 3, the oil-in of the oil-out connected tank 4 of fine filter 2 simultaneously.
As shown in Figure 2, a kind of embodiment of banked direction control valves 7 of the present invention, banked direction control valves 7 comprises the first one way valve 15, large chamber overflow valve 16, first reversal valve the 18, three one way valve 20, loculus overflow valve 21, the 4th one way valve 22 and the second reversal valve 23; The P mouth first via of banked direction control valves 7 connects the oil-in of work overflow valve 17, and the second tunnel connects the oil-in of the second one way valve 19, and the 3rd tunnel connects the A3 mouth of the first reversal valve 18, and the oil-out of work overflow valve 17 connects T mouth; The oil-out of the second one way valve 19 connects the A1 mouth of the first reversal valve 18, and the A2 mouth of the first reversal valve 18 connects T mouth; The B1 mouth first via of the first reversal valve 18 connects D mouth and F mouth simultaneously, and the second tunnel connects the oil-in of loculus overflow valve 21; B2 mouth one tunnel of the first reversal valve 18 connects A mouth, the oil-in of Jie great chamber, another road overflow valve 16; The B3 mouth first via of the first reversal valve 18 connects the C3 mouth of the second reversal valve 23, and the second tunnel connects the oil-in of the 4th one way valve 22, and the 3rd tunnel connects E mouth; The oil-out of the 4th one way valve 22 connects the C1 mouth of the second reversal valve 23, and C2 mouth and the D3 mouth of the second reversal valve 23 connect T mouth simultaneously, and the D1 mouth of the second reversal valve 23 connects C mouth, and D2 mouth connects B mouth; The oil-in of loculus overflow valve 21 connects the oil-out of the 3rd one way valve 20, and the oil-out of loculus overflow valve 21 and the oil-in of the 3rd one way valve 20 connect G mouth and T mouth simultaneously; The oil-in of large chamber overflow valve 16 connects the oil-out of the first one way valve 15, and the oil-out of large chamber overflow valve 16 and the oil-in of the first one way valve 15 connect T mouth simultaneously.
The present invention increases electromagnetic valve 8 outside the hydraulic schematic diagram of common complete machine, pressure switch 9, proximity switch 10 and power supply 11, to be connected Controlling solenoid valve 8 by pressure switch 9 and proximity switch 10, when electromagnetic valve 8 is connected, the hydraulic oil of tipping bucket cylinder 14 loculus directly can get back to fuel tank 4 through electromagnetic valve 8 without loculus overflow valve 21, thus the power loss that reduction tipping bucket cylinder 14 loculus causes because of overflow.
Whether proximity switch 10 is fitted by scraper bowl unloading limited block and swing arm controls.Namely must stick rear bucket at unloading limited block and swing arm and be in maximum unloading angle, proximity switch 10 just responds, and after unloading limited block separates with swing arm, proximity switch 10 disconnects at once, and the laminating being about to unloading limited block and swing arm is converted into the signal of telecommunication.
Pressure switch 9 is controlled by the system pressure controlling moved arm lifting.Namely, when moved arm lifting, pressure switch responds, and during swing arm not lifting, pressure switch 9 disconnects.Signal by lifting action is converted into the signal of telecommunication.
By above two signals of telecommunication series connection Controlling solenoid valve 8.Namely when proximity switch 10 and pressure switch 9 respond simultaneously, electromagnetic valve 8 commutates, thus makes the direct oil sump tank 4 of the hydraulic oil of the loculus of tipping bucket cylinder 14, does not need to carry out oil return through loculus overflow valve 21.Thus the smooth oil return of the loculus realizing tipping bucket cylinder 14, the action of tipping bucket cylinder 14 is extended smoothly, reduces the energy ezpenditure in moved arm lifting process, compensate for the defect of existing complete machine, add complete machine operation flexibility and compliance, meet particular job pattern needs of client.
According to above-described embodiment, its course of work is as follows: when (non-extreme higher position) after moved arm lifting to higher position, driver stops lifting, and starts discharging:
The spool of pilot control handle to the first reversal valve 18 moves to right, and to P mouth and the connection of D mouth of banked direction control valves 7, A mouth and T mouth are connected.So under the effect of working barrel 6, hydraulic oil is through fuel tank 4, coarse filter 5, working barrel 6, the P mouth of banked direction control valves 7, second one way valve 19, first reversal valve 18, D mouth is to the loculus of tipping bucket cylinder 14, promote tipping bucket cylinder 14 to shorten, rotate discharging to realize scraper bowl moving arm, and the large chamber of tipping bucket cylinder 14 is through the A mouth of banked direction control valves 7, first reversal valve 18, T mouth, choke valve 3 and hydraulic oil radiator 1, fine filter 2 is back to fuel tank 4.Thus realize scraper bowl discharging.
When discharging angle increase to scraper bowl unloading limited block be attached on swing arm time, proximity switch 10 responds, make a hold with b termination lead to.
After unsnatching material, driver unclamps control crank, and the first reversal valve 18 gets back to meta under the effect of its back-moving spring, so the P mouth of banked direction control valves 7 and D mouth disconnect, A mouth and T mouth disconnect.Tipping bucket cylinder 14 stop motion, complete machine just completes discharging action, and scraper bowl unloading limited block is attached on swing arm.
Now, the direct lifting swing arm of driver:
The spool of pilot control handle to the second reversal valve 23 moves to left, and to P mouth and the connection of B mouth of banked direction control valves 7, C mouth and T mouth are connected.So, under the effect of working barrel 6, hydraulic oil through fuel tank 4, coarse filter 5, working barrel 6, the P mouth of banked direction control valves 7, the first reversal valve the 18, four one way valve 22, second reversal valve 23, B mouth is to the large chamber of left swing arm cylinder 13 and right swing arm cylinder 12, and left swing arm cylinder 13 and right swing arm cylinder 12 extend simultaneously
The loculus of left swing arm cylinder 13 and right swing arm cylinder 12 by compression after, hydraulic oil through the C mouth of banked direction control valves 7, the second reversal valve 23, T mouth, then through choke valve 3 and hydraulic oil radiator 1, fine filter 2 is back to fuel tank 4.Thus swing arm starts to extend, and realizes lifting action.
Due to the effect of six bar mechanism, the lifting of swing arm makes tipping bucket cylinder 14 occur the action of automatically extending, and when tipping bucket cylinder 14 extends, hydraulic oil is through fuel tank 4, fine filter 2, choke valve 3, the T mouth of banked direction control valves 7, the first one way valve 15, A mouth is to the large chamber of tipping bucket cylinder 14, carry out repairing, and after the loculus of tipping bucket cylinder 14 is compressed, can the direct oil return through electromagnetic valve 8.
Due to P mouth and the connection of E mouth of banked direction control valves 7, during moved arm lifting, E mouth pressure increases, so pressure switch 9 responds, e port and f port are connected, and because proximity switch 10 responds, so Circuits System forms loop, electromagnetic valve 8 responds, and spool moves to right.Namely the Y mouth of electromagnetic valve 8 and Z mouth are connected, thus realize the D mouth of loculus hydraulic oil through banked direction control valves 7 of tipping bucket cylinder 14, F mouth, the Y mouth of electromagnetic valve 8 and Z mouth, the G mouth of banked direction control valves 7, T mouth, then through choke valve 3 and hydraulic oil radiator 1, fine filter 2 is back to fuel tank 4.Thus realize the smooth oil return of tipping bucket cylinder 14 loculus.Namely now the hydraulic oil of tipping bucket cylinder 14 loculus does not need through loculus overflow valve 21 overflow to realize oil return.Tipping bucket cylinder 14 is extended smoothly with the action responding moved arm lifting.
Therefore, whole moved arm lifting action is smooth and easy, and the loculus avoiding tipping bucket cylinder 14 realizes oil return by loculus overflow valve 21 overflow, decreases lifting resistance, decreases Hydraulic System Fever, saved energy.
Unloading limited block is attached to after on swing arm, and energy conserving system work sheet during lifting swing arm is shown in accompanying drawing 3.
When needs stop continuing lifting swing arm, driver needs the spool of control crank to the second reversal valve 23 to get back to meta, and namely the P mouth of banked direction control valves 7 and B mouth disconnect, and C mouth and T mouth disconnect.Thus left swing arm cylinder 13 and right swing arm cylinder 12 stop action.
And after unloading limited block leaves swing arm, proximity switch 10 disconnects at once, circuit malfunction, and the spool of electromagnetic valve 8 resets under the effect of its back-moving spring, and Y mouth and Z mouth disconnect.Namely the loculus of tipping bucket cylinder 14 and fuel tank 4 disconnect, thus tipping bucket cylinder 14 just stops action.If now lifting swing arm again, whole six bar mechanism is just responded by relatively rotating of scraper bowl moving arm, and tipping bucket cylinder 14 can not extend, and also can not shorten.
Afterwards the associative operation of driver and common loader just just the same.Namely, when Circuits System lost efficacy, the function of whole energy conserving system and common loader is just the same.When only having Circuits System to respond, just can realize energy-conservation.
Pressure switch 9 is by the Stress control of banked direction control valves E mouth, and when E mouth pressure increases, pressure switch 9 responds, when E mouth pressure is 0 and fuel tank 4 connect, pressure switch 9 disconnects.When moved arm lifting, E mouth pressure increases as mentioned above.
When pilot control handle makes swing arm decline, namely the spool of the second reversal valve 23 moves to right to the P mouth of banked direction control valves 7 and C mouth and connects, when B mouth and T mouth are connected, E mouth pressure also increases, and pressure switch 9 still responds, but due to swing arm decline time, scraper bowl has the resupinate trend of moving arm, and swing arm declines more, scraper bowl upwards overturns more, as long as scraper bowl upwards overturns, then scraper bowl unloading limited block is just separated with swing arm, now, proximity switch 10 disconnects, and Circuits System cannot respond.Therefore, when swing arm declines, Circuits System can lose efficacy, and function and the common loader hydraulic system of whole energy conserving system are just the same.
Therefore, only have when proximity switch 10 and pressure switch 9 respond simultaneously, namely only have unloading limited block to be attached on swing arm, and during lifting swing arm, Circuits System could be connected, energy-saving effect could embody.
Driver is after high-order discharging during lifting swing arm, and tipping bucket cylinder 14 will realize elongation smoothly and electromagnetic valve 8 must be made to respond, and namely Y mouth and Z mouth are connected, and electromagnetic valve 8 will respond, and must possess 2 conditions simultaneously:
1. unloading limited block is attached on swing arm, and namely proximity switch 10 responds.
2. swing arm continues lifting, and namely pressure switch 9 responds.
Thus the energy-saving run of high-order discharging lifting swing arm action could be realized, make complete machine have greater flexibility and compliance.
Claims (4)
1. a loader lifting swing arm energy conserving system, is characterized in that, comprises oil piping system and Circuits System;
Described oil piping system comprises choke valve (3), fuel tank (4), working barrel (6), banked direction control valves (7) and tipping bucket cylinder (14), the oil-out of fuel tank (4) connects the oil-in of working barrel (6), the oil-out of working barrel (6) connects the P mouth of banked direction control valves (7), the A mouth of banked direction control valves (7) connects the large chamber of tipping bucket cylinder (14), the B mouth of banked direction control valves (7) connects the large chamber of left swing arm cylinder (13) and right swing arm cylinder (12) simultaneously, the C mouth of banked direction control valves (7) connects the loculus of left swing arm cylinder (13) and right swing arm cylinder (12) simultaneously, the D mouth of banked direction control valves (7) connects the loculus of tipping bucket cylinder (14), T mouth one tunnel of banked direction control valves (7) connects the oil-in of hydraulic oil radiator (1), another road connects the oil-in of choke valve (3), the oil-in of the oil-out of the oil-out of hydraulic oil radiator (1) and choke valve (3) connected tank (4) simultaneously,
Described Circuits System comprises electromagnetic valve (8), pressure switch (9), proximity switch (10) and power supply (11); The positive pole of power supply (11) connects a port of proximity switch (10), the b port of proximity switch (10) connects the e port of pressure switch (9), the f port of pressure switch (9) connects the entrance point of electromagnetic valve (8), the negative pole of the outlet termination power (11) of electromagnetic valve (8); The E mouth of banked direction control valves (7) connects the hydraulic fluid port end of pressure switch (9), and the F mouth of banked direction control valves (7) connects the Y mouth of electromagnetic valve (8), and the G mouth of banked direction control valves (7) connects the Z mouth of electromagnetic valve (8); When proximity switch (10) and pressure switch (9) respond simultaneously, electromagnetic valve (8) commutates, and makes the direct oil sump tank of hydraulic oil (4) of the loculus of tipping bucket cylinder (14).
2. a kind of loader lifting swing arm energy conserving system according to claim 1, it is characterized in that, the oil-out of described fuel tank (4) connects the oil-in of coarse filter (5), and the oil-out of coarse filter (5) connects the oil-in of working barrel (6).
3. a kind of loader lifting swing arm energy conserving system according to claim 1 and 2, it is characterized in that, the oil-out of described hydraulic oil radiator (1) and the oil-out of choke valve (3) connect the oil-in of fine filter (2) simultaneously, the oil-in of the oil-out connected tank (4) of fine filter (2).
4. a kind of loader lifting swing arm energy conserving system according to claim 1 and 2, it is characterized in that, described banked direction control valves (7) comprises the first one way valve (15), large chamber overflow valve (16), work overflow valve (17), the first reversal valve (18), the 3rd one way valve (20), loculus overflow valve (21), the 4th one way valve (22) and the second reversal valve (23); The P mouth first via of banked direction control valves (7) connects the oil-in of work overflow valve (17), second tunnel connects the oil-in of the second one way valve (19), 3rd tunnel connects the A3 mouth of the first reversal valve (18), and the oil-out of work overflow valve (17) connects T mouth; The oil-out of the second one way valve (19) connects the A1 mouth of the first reversal valve (18), and the A2 mouth of the first reversal valve (18) connects T mouth; The B1 mouth first via of the first reversal valve (18) connects D mouth and F mouth simultaneously, and the second tunnel connects the oil-in of loculus overflow valve (21); B2 mouth one tunnel of the first reversal valve (18) connects A mouth, the oil-in in Jie great chamber, another road overflow valve (16); The B3 mouth first via of the first reversal valve (18) connects the C3 mouth of the second reversal valve (23), and the second tunnel connects the oil-in of the 4th one way valve (22), and the 3rd tunnel connects E mouth; The oil-out of the 4th one way valve (22) connects the C1 mouth of the second reversal valve (23), and C2 mouth and the D3 mouth of the second reversal valve (23) connect T mouth simultaneously, and the D1 mouth of the second reversal valve (23) connects C mouth, and D2 mouth connects B mouth; The oil-in of loculus overflow valve (21) connects the oil-out of the 3rd one way valve (20), and the oil-out of loculus overflow valve (21) and the oil-in of the 3rd one way valve (20) connect G mouth and T mouth simultaneously; The oil-in in large chamber overflow valve (16) connects the oil-out of the first one way valve (15), and the oil-out in large chamber overflow valve (16) and the oil-in of the first one way valve (15) connect T mouth simultaneously.
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| CN201510278844.7A CN104929170B (en) | 2015-05-27 | 2015-05-27 | A kind of loading machine lifts swing arm energy conserving system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113323070A (en) * | 2021-06-28 | 2021-08-31 | 雷沃工程机械集团有限公司 | Excavator movable arm hydraulic system and control method thereof |
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