CN104929170B - A kind of loading machine lifts swing arm energy conserving system - Google Patents
A kind of loading machine lifts swing arm energy conserving system Download PDFInfo
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- CN104929170B CN104929170B CN201510278844.7A CN201510278844A CN104929170B CN 104929170 B CN104929170 B CN 104929170B CN 201510278844 A CN201510278844 A CN 201510278844A CN 104929170 B CN104929170 B CN 104929170B
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Abstract
Swing arm energy conserving system, including oil piping system and circuit system are lifted the invention discloses a kind of loading machine；The oil piping system includes choke valve, fuel tank, working barrel, banked direction control valves and tipping bucket cylinder；The circuit system includes magnetic valve, pressure switch, proximity switch and power supply.By connecting magnetic valve between the F of banked direction control valves mouths and G mouthfuls, by the commutation of magnetic valve so that the small chamber of tipping bucket cylinder is directly connected with fuel tank and realizes oil return, so as to eliminate small chamber overflow because compressed of tipping bucket cylinder.The present invention allows, when scraper bowl unloads limited block and is attached on swing arm, to continue to lift swing arm, by making the smooth overflow of small chamber, it can smoothly realize that tipping bucket cylinder extends automatically, the resistance that tipping bucket cylinder extends and produced automatically during because of moved arm lifting is reduced, while reducing the caloric value of hydraulic system, energy expenditure is reduced.Hereby, it is achieved that when allowing scraper bowl at an arbitrary position, can lift swing arm.Add flexibility and the labor aptitude of complete machine.
Description
Technical field
The present invention relates to a kind of loading machine, specifically a kind of loading machine lifting swing arm energy conserving system.
Background technology
During loading machine discharging, swing arm need to be typically lifted to higher position (or extreme higher position), discharging is then carried out, in order to
Ensure that material can be unloaded totally, during discharging, typically all scraper bowl discharging to scraper bowl unloading limited block is attached on swing arm.After discharging, drive
The person of sailing often first receives bucket and turned over to scraper bowl, the elongation of tipping bucket cylinder, and the operator plate to scraper bowl exceedes the height of swing arm or receives bucket extremely
Position before discharging, then falls back complete machine, then the swing arm that lands, and carries out next cycle shovel and pretends industry, without allowing directly to lift
Swing arm.If after high-order discharging, when directly lifting swing arm without the operation of receipts bucket, due to the movement properties of six bar mechanism,
So that scraper bowl has the trend rotated down around swing arm, scraper bowl unloading limited block has the trend of increase to the pressure of swing arm plate, due to
Unloading limited block has been attached on swing arm, and therefore, scraper bowl just can not be rotated down around swing arm, and whole mechanism can pass through tipping bucket cylinder
Elongation is acted to respond the lifting of swing arm, and the valve core of multiway valve for controlling the elongation of tipping bucket cylinder to act is not opened, for non-elder generation
The loading machine of control is led, i.e., valve core of multiway valve is directly controlled by pilot control handle, to control the commutation of working connection.Due to
The big chamber of tipping bucket cylinder has repairing check valve, and small chamber has small chamber overflow valve, therefore occurs, the automatic repairing of the big chamber of tipping bucket cylinder, with sound
The automatic elongation of tipping bucket cylinder is answered, and pressure increases to small chamber overflow valve unlatching to realize oil return after small chamber is compressed.Tipping bucket cylinder
The overflow of small chamber can produce larger resistance, that is, have larger resistance when lifting swing arm, while relatively high power is consumed, also
Hydraulic pressure heating of oil can be caused, therefore this does not allow in practice.Moved arm lifting it is higher, the small chamber of tipping bucket cylinder passes through overflow valve
Spillway discharge is more, and hydraulic oil caloric value is bigger, and the power consumption of generation is also bigger.So as to waste more power, oil consumption compared with
Height, fuel economy is poor.In order to save power, fuel consumption etc. is reduced, typically not in swing arm is now directly lifted, i.e.,
Not scraper bowl can directly lift swing arm in free position to common loading machine, and the operation flexibility of complete machine is restricted.
The movement properties of loading machine six bar mechanism cause the small chamber of tipping bucket cylinder by overflow valve overflow, cause large energy
Loss, so that as conventional load machine defect, i.e., is attached on swing arm afterwards that (swing arm is now simultaneously not in unloading limited block
Not in extreme higher position), it is further continued for lifting swing arm.Therefore, the operating flexibility and mode of operation of loading machine can be restricted.
But from the point of view of reality, during guest operation complete machine, often a tractor serves several purposes, the operating mode of operation is very various
Change, and often according to specific operating mode, to select suitable mode of operation, when driver due to mode of operation needs and herein
During Shi Tisheng swing arms, larger power consumption is just caused.So that the oil consumption that each working cycles are caused is higher.
The content of the invention
In view of the above-mentioned problems of the prior art, the present invention provides a kind of loading machine lifting swing arm energy conserving system, save
Energy and the flexibility for increasing complete machine, by eliminating the overflow of the small chamber of tipping bucket cylinder during lifting swing arm, to reduce energy expenditure, together
When reduce the heating of fluid, increase complete machine flexibility and complete machine adaptability.
To achieve these goals, a kind of loading machine lifting swing arm energy conserving system of the invention, including oil piping system and circuit
System；The oil piping system includes choke valve, fuel tank, working barrel, banked direction control valves and tipping bucket cylinder；The oil-out of fuel tank connects working barrel
Oil inlet；The oil-out of working barrel connects the P mouths of banked direction control valves, and the A mouths of banked direction control valves connect the big chamber of tipping bucket cylinder, and the B mouths of banked direction control valves are simultaneously
The big chamber of left swing arm cylinder and right swing arm cylinder is connect, the C mouths of banked direction control valves connect the small chamber of left swing arm cylinder and right swing arm cylinder simultaneously, banked direction control valves
D mouthfuls connect tipping bucket cylinder small chamber, the T mouths of banked direction control valves connect the oil inlet of hydraulic oil radiator all the way, and another road connects the oil-feed of choke valve
Mouthful, the oil-out of hydraulic oil radiator and the oil-out of choke valve are while the oil inlet of connected tank；
The circuit system includes magnetic valve, pressure switch, proximity switch and power supply；The positive pole of power supply connects proximity switch
A ports, the b ports of proximity switch connect the e ports of pressure switch, and the f ports of pressure switch connect the entrance point of magnetic valve,
The negative pole of the outlet termination power of magnetic valve；The E mouths of banked direction control valves connect the hydraulic fluid port end of pressure switch, and the F mouths of banked direction control valves connect electromagnetism
The Y mouths of valve, the G mouths of banked direction control valves connect the Z mouths of magnetic valve；When proximity switch and pressure switch are responded simultaneously, magnetic valve commutation,
Make the direct oil return box of hydraulic oil of the small chamber of tipping bucket cylinder.
As the further scheme of the present invention, the oil-out of the fuel tank connects the oil inlet of coarse filter, coarse filter it is fuel-displaced
Mouth connects the oil inlet of working barrel.Because general filter can block, general filter is substituted with coarse filter.
As the further scheme of the present invention, the oil-out of the hydraulic oil radiator and the oil-out of choke valve connect simultaneously
The oil inlet of fine filter, the oil inlet of the oil-out connected tank of fine filter.Further carried using fine filter at fuel tank oil inlet
High oil cleanliness.
As a kind of scheme of the present invention, banked direction control valves includes the first check valve, big chamber overflow valve, work overflow valve, first
Reversal valve, the 3rd check valve, small chamber overflow valve, the 4th check valve and the second reversal valve；The P mouth first via of banked direction control valves connects work and overflow
The oil inlet of valve is flowed, the second tunnel connects the oil inlet of the second check valve, and the 3rd tunnel connects the A3 mouths of the first reversal valve, work overflow valve
Oil-out connects T mouthfuls；The oil-out of second check valve connects the A1 mouths of the first reversal valve, and the A2 mouths of the first reversal valve connect T mouthfuls；First changes
D mouthfuls and F mouthfuls are connect simultaneously to the B1 mouth first via of valve, the second tunnel connects the oil inlet of small chamber overflow valve；The B2 mouths one of first reversal valve
Road connects A mouthfuls, and another road connects the oil inlet of big chamber overflow valve；The B3 mouth first via of first reversal valve connects the C3 mouths of the second reversal valve,
Second tunnel connects the oil inlet of the 4th check valve, and the 3rd tunnel connects E mouthfuls；The oil-out of 4th check valve connects the C1 mouths of the second reversal valve,
The C2 mouths of second reversal valve connect T mouthfuls simultaneously with D3 mouthfuls, and the D1 mouths of the second reversal valve connect C mouthfuls, and D2 mouthfuls connect B mouthfuls；Small chamber overflow valve
Oil inlet connects the oil-out of the 3rd check valve, and the oil-out of small chamber overflow valve and the oil inlet of the 3rd check valve meet G mouthfuls and T simultaneously
Mouthful；The oil inlet of big chamber overflow valve connects the oil-out of the first check valve, the oil-out of big chamber overflow valve and entering for the first check valve
Hydraulic fluid port connects T mouthfuls simultaneously.
The present invention has the beneficial effect that compared with prior art：1. cost is low.Work of the whole energy conserving system in common loading machine
Make in hydraulic system, it is only extra to increase the cost of power supply, proximity switch, pressure switch, magnetic valve and the related route of pipe line, with dress
The hundreds thousand of cost of carrier aircraft compares, increased cost very little.
2. electrichydraulic control make it that the sensitivity of whole energy conserving system is very high.It is close to open after unloading limited block is attached on swing arm
Rapid connection is closed, during lifting swing arm, pressure switch is responded rapidly to, so that magnetic valve commutates rapidly, tipping bucket cylinder smoothly extends,
The small smooth oil return box of chamber.Electrical equipment and hydraulic control cause being swift in response for whole system, and sensitivity is very high.
3. the principle of whole energy conserving system is simple, failure is easily drained.On the hydraulic system of working of common loading machine, increase
Plus seldom part, therefore principle is readily appreciated that failure is easier to judge, attendant's maintenance conditions are convenient, safeguard into
This is relatively low, once breaking down, can quickly exclude.
4. good energy saving performance.Due to the small chamber of tipping bucket cylinder it is compressed after, pressure increase so that overflow, can produce larger resistance
Power, therefore during lifting swing arm, complete machine needs to consume extra power to overcome above-mentioned phenomenon.And the loading machine lifting of the present invention is dynamic
Arm energy conserving system just overcomes above-mentioned phenomenon from design, therefore has saved engine power, reduces the caloric value of hydraulic oil,
Fuel consumption and energy are saved.
5. more preferably, adaptability is more extensive for the flexibility of complete machine.The energy conserving system of the present invention is after high-order discharging, it is allowed to whole
Machine directly lifts swing arm on the premise of bucket is not received, and tipping bucket cylinder can smoothly realize elongation.Therefore, energy-conservation system of the invention
System adds the flexibility of equipment, and adaptability is further enhanced, and function is more perfect.Allow after any angle discharging, i.e.,
No matter scraper bowl be in where, all allow directly lifting swing arm.
6. easily it is embodied as the supporting application of complete machine.The domestic system of the associated parts such as magnetic valve, pressure switch and proximity switch
Technology maturation, easy to process, easy to manufacture are made, so as to be easily the use of main frame manufacturer.
7. the system is easily generalized.Whole system is because magnetic valve is easy to process, the extra increased cost of system very
Small, failure is easily determined, the sensitivity of system is very high, and better adaptability so that the system is easily expanded to be used.
8. the small chamber of tipping bucket cylinder of the present invention carries out pressure release by the way of magnetic valve commutates direct oil return, reduce lifting swing arm
When, the energy loss that overflow is brought, while the heating of hydraulic system is reduced, so as to realize the energy-conservation of system.
9. the present invention is controlled the commutation of magnetic valve by proximity switch and pressure switch series connection, both must act as simultaneously
With circuit just can turn on, and can just embody energy-conserving action.Swing arm is lifted when unloading limited block and leaving swing arm；Or limited block patch
On swing arm, and driver is when lifting swing arm, and circuit is all without connection, and energy conserving system just will not work, now energy-conservation system
The hydraulic system of system and common loading machine is fully equivalent.Therefore, the energy conserving system that the present invention simply works under special circumstances,
During normal work and common loading machine is just the same.
Brief description of the drawings
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；
After Fig. 3 is attached on swing arm for unloading limited block, energy conserving system work sheet during lifting swing arm；
In figure：1st, hydraulic oil radiator；2nd, fine filter；3rd, choke valve；4th, fuel tank；5th, coarse filter；6th, working barrel；7th, multichannel
Valve；8th, magnetic valve；9th, pressure switch；10th, proximity switch；11st, power supply；12nd, right swing arm cylinder；13rd, left swing arm cylinder；14th, tipping bucket
Cylinder；15th, the first check valve；16th, big chamber overflow valve；17th, work overflow valve；18th, the first reversal valve；19th, the second check valve；20、
3rd check valve；21st, small chamber overflow valve；22nd, the 4th check valve；23rd, the second reversal valve.
Embodiment
In order that those skilled in the art more fully understand the present invention program, with reference to the accompanying drawings and detailed description
The present invention is described in further detail.
As shown in figure 1, the loading machine lifting swing arm energy conserving system of the present invention, including oil piping system and circuit system；Oil circuit
System includes 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-feed of working barrel 6
Mouthful；The oil-out of working barrel 6 connects the P mouths of banked direction control valves 7, and the A mouths of banked direction control valves 7 connect the big chamber of tipping bucket cylinder 14, and the B mouths of banked direction control valves 7 are same
When connect the big chamber of left swing arm cylinder 13 and right swing arm cylinder 12, the C mouths of banked direction control valves 7 connect the small of left swing arm cylinder 13 and right swing arm cylinder 12 simultaneously
Chamber, the D mouths of banked direction control valves 7 connect the small chamber of tipping bucket cylinder 14, and the T mouths of banked direction control valves 7 connect the oil inlet of hydraulic oil radiator 1 all the way, another
Road connects the oil inlet of choke valve 3, the oil-out of hydraulic oil radiator 1 and the oil-out of choke valve 3 while the oil-feed of connected tank 4
Mouthful；
Circuit system includes magnetic valve 8, pressure switch 9, proximity switch 10 and power supply 11；The positive pole of power supply 11 is close
The a ports of switch 10, the b ports of proximity switch 10 connect the e ports of pressure switch 9, and the f ports of pressure switch 9 connect electromagnetism
The entrance point of valve 8, the negative pole of the outlet termination power 11 of magnetic valve 8；The E mouths of banked direction control valves 7 connect the hydraulic fluid port end of pressure switch 9,
The F mouths of banked direction control valves 7 connect the Y mouths of magnetic valve 8, and the G mouths of banked direction control valves 7 connect the Z mouths of magnetic valve 8；When proximity switch 10 and pressure relay
Device 9 is responded simultaneously when, magnetic valve 8 commutates, and makes the direct oil return box 4 of hydraulic oil of the small chamber of tipping bucket cylinder 14.
On the basis of said structure, the present invention also connects the oil inlet of coarse filter 5 in the oil-out of fuel tank 4, and coarse filter 5 goes out
Hydraulic fluid port connects the oil inlet of working barrel 6.Also fine filter 2 is connect in the oil-out of hydraulic oil radiator 1 and the oil-out of choke valve 3 simultaneously
Oil inlet, the oil inlet of the oil-out connected tank 4 of fine filter 2.
As shown in Fig. 2 a kind of embodiment of banked direction control valves 7 of the present invention, banked direction control valves 7 includes the first check valve 15, big chamber overflows
Flow valve 16, the first reversal valve 18, the 3rd check valve 20, small chamber overflow valve 21, the 4th check valve 22 and the second reversal valve 23；Multichannel
The P mouth first via of valve 7 connects the oil inlet of work overflow valve 17, and the second tunnel connects the oil inlet of the second check valve 19, and the 3rd tunnel connects
The A3 mouths of one reversal valve 18, the oil-out of work overflow valve 17 connects T mouthfuls；The oil-out of second check valve 19 connects the first reversal valve 18
A1 mouths, the A2 mouths of the first reversal valve 18 connect T mouthfuls；The B1 mouth first via of first reversal valve 18 connects D mouthfuls and F mouthfuls, the second tunnel simultaneously
Connect the oil inlet of small chamber overflow valve 21；The B2 mouths of first reversal valve 18 connect A mouthfuls all the way, and another road connects the oil-feed of big chamber overflow valve 16
Mouthful；The B3 mouth first via of first reversal valve 18 connects the C3 mouths of the second reversal valve 23, and the second tunnel connects the oil inlet of the 4th check valve 22,
3rd tunnel connects E mouthfuls；The oil-out of 4th check valve 22 connects the C1 mouths of the second reversal valve 23, the C2 mouths of the second reversal valve 23 and D3 mouthfuls
T mouthfuls are connect simultaneously, the D1 mouths of the second reversal valve 23 connect C mouthfuls, and D2 mouthfuls connect B mouthfuls；The oil inlet of small chamber overflow valve 21 connects the 3rd check valve
20 oil-out, the oil-out of small chamber overflow valve 21 and the oil inlet of the 3rd check valve 20 connect G mouthfuls and T mouthfuls simultaneously；Big chamber overflow
The oil inlet of valve 16 connects the oil inlet of the oil-out of the first check valve 15, the oil-out of big chamber overflow valve 16 and the first check valve 15
Connect T mouthfuls simultaneously.
The present invention increases magnetic valve 8, pressure switch 9, the He of proximity switch 10 outside the hydraulic schematic diagram of common complete machine
Power supply 11, is connected by pressure switch 9 and proximity switch 10 and controls magnetic valve 8, when magnetic valve 8 is connected, the small chamber of tipping bucket cylinder 14
Hydraulic oil can be directly over magnetic valve 8 without too small chamber overflow valve 21 and return to fuel tank 4 so that reduce the small chamber of tipping bucket cylinder 14 because
Overflow and the power loss caused.
Proximity switch 10 unloads limited block is controlled with whether swing arm fits by scraper bowl.I.e. must be in unloading limited block with moving
Arm sticks rear bucket and is in maximum unloading angle, and proximity switch 10 is just responded, and after unloading limited block is separated with swing arm, approaches
Switch 10 disconnects at once, will unload limited block and be converted into electric signal with fitting for swing arm.
Pressure switch 9 is controlled by the system pressure of control moved arm lifting.I.e. in moved arm lifting, pressure switch rings
Should, and swing arm is when lifting, pressure switch 9 disconnects.The signal that action will be lifted is converted into electric signal.
By two above electric signal series connection control magnetic valve 8.I.e. when simultaneously proximity switch 10 and pressure switch 9 are responded
When, magnetic valve 8 commutates, so that the direct oil return box 4 of the hydraulic oil of the small chamber of tipping bucket cylinder 14, it is not necessary to through too small chamber overflow valve
21 carry out oil return.So as to realize the smooth oil return of small chamber of tipping bucket cylinder 14, the action of tipping bucket cylinder 14 smoothly extends, and reduces moved arm lifting mistake
Energy expenditure in journey, compensate for the defect of existing complete machine, add complete machine operation flexibility and adaptability, meet the spy of client
Different mode of operation needs.
According to above-described embodiment, its course of work is as follows：Behind moved arm lifting to higher position (non-extreme higher position), drive
Member stops lifting, and starts discharging：
The valve element of pilot control handle to the first reversal valve 18 is moved to right, and the P mouths to banked direction control valves 7 are connected with D mouthfuls, A mouthfuls and T
Mouth is connected.Then, in the presence of working barrel 6, hydraulic oil is through fuel tank 4, coarse filter 5, working barrel 6, the P mouths of banked direction control valves 7, second
Check valve 19, the first reversal valve 18, D mouthfuls to tipping bucket cylinder 14 of small chamber promotes tipping bucket cylinder 14 to shorten, with realize scraper bowl around swing arm to
Lower rotate carrys out discharging, and A mouth of the big chamber of tipping bucket cylinder 14 through banked direction control valves 7, the first reversal valve 18, T mouthfuls, choke valve 3 and hydraulic oil
Radiator 1, fine filter 2 is back to fuel tank 4.So as to realize scraper bowl discharging.
When discharging angle, which increases to scraper bowl unloading limited block, to be attached on swing arm, proximity switch 10 is responded so that a ends and b
Termination is logical.
Unsnatch after material, driver unclamps control crank, the first reversal valve 18 returns to middle position in the presence of its back-moving spring,
Then the P mouths of banked direction control valves 7 and D mouthfuls of disconnections, A mouthfuls and T mouthfuls disconnections.The stop motion of tipping bucket cylinder 14, complete machine just completes discharging action,
And scraper bowl unloading limited block is attached on swing arm.
Now, driver directly lifts swing arm：
The valve element of pilot control handle to the second reversal valve 23 is moved to left, and the P mouths to banked direction control valves 7 are connected with B mouthfuls, C mouthfuls and T
Mouth is connected.Then, in the presence of working barrel 6, hydraulic oil is through fuel tank 4, coarse filter 5, working barrel 6, the P mouths of banked direction control valves 7, first
Reversal valve 18, the 4th check valve 22, the second reversal valve 23, the B mouthfuls of big chambers to left swing arm cylinder 13 and right swing arm cylinder 12, left swing arm cylinder
13 and right swing arm cylinder 12 extend simultaneously,
After the small chamber of left swing arm cylinder 13 and right swing arm cylinder 12 is compressed, C mouth of the hydraulic oil through banked direction control valves 7, the second reversal valve
23, T mouthfuls, then through choke valve 3 and hydraulic oil radiator 1, fine filter 2 is back to fuel tank 4.So as to which swing arm starts elongation, lifting is realized
Action.
Due to the effect of six bar mechanism, the lifting of swing arm causes tipping bucket cylinder 14 action extended automatically, tipping bucket cylinder occur
During 14 elongation, hydraulic oil is through fuel tank 4, fine filter 2, choke valve 3, the T mouths of banked direction control valves 7, the first check valve 15, A mouthfuls to tipping bucket cylinder
14 big chamber, carries out repairing, and after the small chamber of tipping bucket cylinder 14 is compressed, can the directly oil return by magnetic valve 8.
Because the P mouths of banked direction control valves 7 are connected with E mouthfuls, during moved arm lifting, E mouthfuls of pressure increases, then, the sound of pressure switch 9
Should, e ports are connected with f ports, because proximity switch 10 has responded to, then circuit system formation loop, and magnetic valve 8 is responded,
Valve element is moved to right.That is the Y mouths of magnetic valve 8 are connected with Z mouthfuls, so as to realize D mouth of the small chamber hydraulic oil of tipping bucket cylinder 14 through banked direction control valves 7, F
Mouthful, Y mouths of magnetic valve 8 and Z mouthfuls, the G mouths of banked direction control valves 7, T mouthfuls, then through choke valve 3 and hydraulic oil radiator 1, fine filter 2 is back to
Fuel tank 4.So as to realize the smooth oil return of the small chamber of tipping bucket cylinder 14.I.e. now the hydraulic oil of the small chamber of tipping bucket cylinder 14 needs not move through small chamber
Oil return is realized in overflow valve 21 overflow.Tipping bucket cylinder 14 is set smoothly to extend to respond the action of moved arm lifting.
Therefore, the action of whole moved arm lifting is smooth, it is to avoid it is real that the small chamber of tipping bucket cylinder 14 passes through the small overflow of chamber overflow valve 21
Existing oil return, reduces lifting resistance, reduces Hydraulic System Fever, saved energy.
After unloading limited block is attached on swing arm, energy conserving system work sheet during lifting swing arm is shown in accompanying drawing 3.
When needing to stop continuing to lift swing arm, driver is needed during the valve element of control crank to the second reversal valve 23 returns to
Position, i.e. the P mouths of banked direction control valves 7 and B mouthfuls of disconnections, C mouthfuls and T mouthfuls disconnections.So as to which left swing arm cylinder 13 and the stopping of right swing arm cylinder 12 are acted.
And after unloading limited block leaves swing arm, proximity switch 10 is turned off, circuit malfunction, and the valve element of magnetic valve 8 exists
Resetted in the presence of its back-moving spring, Y mouthfuls disconnect with Z mouthfuls.I.e. the small chamber of tipping bucket cylinder 14 disconnects with fuel tank 4, so that tipping bucket cylinder 14
Just stopping is acted.If now lifting swing arm again, whole six bar mechanism will pass through scraper bowl around the relative rotation of swing arm to be rung
Should, and tipping bucket cylinder 14 will not extend, and will not also shorten.
The associative operation of driver and common loading machine are just just the same afterwards.I.e. when circuit system fails, whole section
Energy system and the function of common loading machine are just the same.When only circuit system is responded, energy-conservation can be just realized.
Pressure switch 9 is by the Stress control of E mouthfuls of banked direction control valves, and when E mouthfuls of pressure increases, pressure switch 9 is responded, and works as E
Mouth pressure is connected when being 0 with fuel tank 4, and pressure switch 9 disconnects.When moved arm lifting, E mouthfuls of pressure increases are as described above.
When pilot control handle make it that swing arm declines, i.e. the valve element of the second reversal valve 23 is moved to right to the P mouths of banked direction control valves 7
Connected with C mouthfuls, B mouthfuls when being connected with T mouthfuls, E mouthfuls of pressure also increase, and pressure switch 9 is still responded, but are due to that swing arm declines
When, scraper bowl has the trend being flipped up around swing arm, and swing arm decline it is more, scraper bowl be flipped up it is more, as long as scraper bowl is turned over upwards
Turn, then scraper bowl unloading limited block is just separated with swing arm, and now, proximity switch 10 disconnects, and circuit system cannot respond to.Therefore, when
When swing arm declines, circuit system can fail, and the function of whole energy conserving system and common loader hydraulic system are just the same.
Therefore, only simultaneously when proximity switch 10 and pressure switch 9 are responded, i.e., only unloading limited block is attached to swing arm
On, and during lifting swing arm, circuit system just can turn on, and energy-saving effect could embody.
When driver lifts swing arm after high-order discharging, tipping bucket cylinder 14 will smoothly realize that elongation must be so that the sound of magnetic valve 8
Should, i.e. Y mouthfuls is connected with Z mouthfuls, and magnetic valve 8 will be responded, it is necessary to be provided simultaneously with 2 conditions：
1. unloading limited block is attached on swing arm, i.e., proximity switch 10 is responded.
2. swing arm continues to lift, i.e., pressure switch 9 is responded.
So as to which the energy-saving run of high-order discharging lifting swing arm action could be realized, complete machine is set to possess greater flexibility and suitable
Ying Xing.
Claims (4)
1. a kind of loading machine lifts swing arm energy conserving system, it is characterised in that including oil piping system and circuit system；
The oil piping system includes choke valve (3), fuel tank (4), working barrel (6), banked direction control valves (7) and tipping bucket cylinder (14)；Fuel tank (4)
Oil-out connect the oil inlets of working barrel (6)；The oil-out of working barrel (6) connects the P mouths of banked direction control valves (7), the A mouths of banked direction control valves (7)
The big chamber of tipping bucket cylinder (14) is connect, the B mouths of banked direction control valves (7) connect the big chamber of left swing arm cylinder (13) and right swing arm cylinder (12), multichannel simultaneously
The C mouths of valve (7) connect the small chamber of left swing arm cylinder (13) and right swing arm cylinder (12) simultaneously, and the D mouths of banked direction control valves (7) connect tipping bucket cylinder (14)
Small chamber, the T mouths of banked direction control valves (7) connect the oil inlet of hydraulic oil radiator (1) all the way, and another road connects the oil inlet of choke valve (3), liquid
The oil-out of radiator (1) and the oil-out of choke valve (3) are pressed oil while the oil inlet of connected tank (4)；
The circuit system includes magnetic valve (8), pressure switch (9), proximity switch (10) and power supply (11)；Power supply (11)
Positive pole connects a ports of proximity switch (10), and the b ports of proximity switch (10) connect the e ports of pressure switch (9), pressure relay
The f ports of device (9) connect the entrance point of magnetic valve (8), the negative pole of the outlet termination power (11) of magnetic valve (8)；Banked direction control valves (7)
E mouthfuls connect pressure switch (9) hydraulic fluid port end, the F mouths of banked direction control valves (7) connect the Y mouths of magnetic valve (8), and the G mouths of banked direction control valves (7) connect electricity
The Z mouths of magnet valve (8)；When proximity switch (10) and pressure switch (9) while when responding, magnetic valve (8) commutation makes tipping bucket cylinder
(14) the direct oil return box of hydraulic oil (4) of small chamber.
2. a kind of loading machine lifting swing arm energy conserving system according to claim 1, it is characterised in that the fuel tank (4)
Oil-out connects the oil inlet of coarse filter (5), and the oil-out of coarse filter (5) connects the oil inlet of working barrel (6).
3. a kind of loading machine lifting swing arm energy conserving system according to claim 1 or 2, it is characterised in that the hydraulic oil
The oil-out of radiator (1) and the oil-out of choke valve (3) connect the oil inlet of fine filter (2), the oil-out of fine filter (2) simultaneously
The oil inlet of connected tank (4).
4. a kind of loading machine lifting swing arm energy conserving system according to claim 1 or 2, it is characterised in that the banked direction control valves
(7) the first check valve (15), big chamber overflow valve (16), work overflow valve (17), the first reversal valve (18), the 3rd check valve are included
(20), small chamber overflow valve (21), the 4th check valve (22) and the second reversal valve (23)；The P mouth first via of banked direction control valves (7) connects work
The oil inlet of overflow valve (17), the second tunnel connects the oil inlet of the second check valve (19), and the 3rd tunnel meets the A3 of the first reversal valve (18)
Mouthful, the oil-out of work overflow valve (17) connects T mouthfuls；The oil-out of second check valve (19) connects the A1 mouths of the first reversal valve (18),
The A2 mouths of first reversal valve (18) connect T mouthfuls；The B1 mouth first via of first reversal valve (18) connects D mouthfuls and F mouthfuls simultaneously, and the second tunnel connects small
The oil inlet of chamber overflow valve (21)；The B2 mouths of first reversal valve (18) connect A mouthfuls all the way, and another road meets entering for big chamber overflow valve (16)
Hydraulic fluid port；The B3 mouth first via of first reversal valve (18) connects the C3 mouths of the second reversal valve (23), and the second tunnel connects the 4th check valve (22)
Oil inlet, the 3rd tunnel connects E mouthfuls；The oil-out of 4th check valve (22) connects the C1 mouths of the second reversal valve (23), the second reversal valve
(23) C2 mouths connect T mouthfuls simultaneously with D3 mouthfuls, and the D1 mouths of the second reversal valve (23) connect C mouthfuls, and D2 mouthfuls connect B mouthfuls；Small chamber overflow valve (21)
Oil inlet connect the oil-out of the 3rd check valve (20), the oil-feed of the oil-out and the 3rd check valve (20) of small chamber overflow valve (21)
Mouth connects G mouthfuls and T mouthfuls simultaneously；The oil inlet of big chamber overflow valve (16) connects the oil-out of the first check valve (15), big chamber overflow valve
(16) oil-out and the oil inlet of the first check valve (15) connects T mouthfuls simultaneously.
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| CN113323070B (en) * | 2021-06-28 | 2022-03-25 | 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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