CN205329757U - No spill losses loader hydraulic pressure work systems - Google Patents
No spill losses loader hydraulic pressure work systems Download PDFInfo
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- CN205329757U CN205329757U CN201620040304.5U CN201620040304U CN205329757U CN 205329757 U CN205329757 U CN 205329757U CN 201620040304 U CN201620040304 U CN 201620040304U CN 205329757 U CN205329757 U CN 205329757U
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Abstract
The utility model discloses a no spill losses loader hydraulic pressure work systems, at crude engine, the transmission shaft, a filte, the oil tank, the constant delivery pump, the multiple unit valve, rotating bucket oil cylinder, boom cylinder, the functions of a safety valve, on the structure basis of two effect relief valves, install first two tee bends switching -over valve additional between multiple unit valve and constant delivery pump, high -pressure accumulator, install two tee bend switching -over valves of low pressure energy storage ware and second additional on the oil return oil circuit, and use pressure sensor to measure the pressure value of energy storage ware respectively. Through controlling two tee bend switching -over valves of first two tee bends switching -over valve and second, just can realize quantitative pumping over outflow and load (outer load and energy storage ware) demand flow phase -match, the energy resource consumption of avoiding the spill losses to lead to the fact totally reduces the energy resource consumption that throttling loss led to the fact, has improved the overall efficiency. Retrieve swing arm decline potential energy and adopt low pressure energy storage ware for drive steering mechanism has further improved energy utilization.
Description
Technical field
This utility model relates to technical field of engineering machinery, particularly to a kind of loader energy-conserving hydraulic work system without spill losses
Background technology
Hydraulic system is the important component part of loader, and loader is widely used in the fields such as mine, road administration, building。The current commonly used dosing pump of middle-size and small-size loader, there will be pump and the unmatched phenomenon of loading demand flow, causes spill losses in work process, cause fuel economy to decline and hydraulic oil oil temperature raises。So it is unfavorable for environmental protection and the service life of hydraulic oil can be reduced and then affect reliability and the efficiency of whole hydraulic systems and components。The commonly used variable pump of large-duty loader, cost is high and sensitive to pollution。
The power-saving technology that current product mainly adopts has Dual-pump flow-converging technology and Dual-pump flow-converging equivalence off-load technology, but does not all thoroughly solve flooding problems, so energy-saving effect is very limited。Although variable pump technology can reduce power loss, but owing to it involves great expense, it is difficult at present popularize。
The utility model proposes a kind of energy-conserving hydraulic work system, by Constant Pump System is improved, so that it may avoid spill losses completely, with variable pump systems, there is identical energy-saving effect, avoid high cost simultaneously。
Summary of the invention
The purpose of this utility model is to provide a kind of loader hydraulic work system without spill losses。
This utility model system is made up of electromotor 21, power transmission shaft 20, filter 17, fuel tank 18, dosing pump 19, two-bit triplet reversal valve, banked direction control valves, rotary ink tank 4, boom cylinder 5, controller 6, relief valve, accumulator, check valve 15, double-acting safety valve, pressure transducer。Described banked direction control valves includes three six-way transfer valves 2, four position and four-way reversing valve 3。Described two-bit triplet reversal valve includes first two-bit triplet reversal valve the 1, second two-bit triplet reversal valve 13。Described relief valve includes first relief valve the 14, second relief valve 16。Described accumulator includes high pressure accumulator 7 and low pressure accumulator 8。Described double-acting safety valve includes first double-acting safety valve the 11, second double-acting safety valve 12。Described pressure transducer includes first pressure transducer the 9, second pressure transducer 10。Described electromotor 21 is connected with dosing pump 19 by power transmission shaft 20；Described dosing pump 19 oil-in is connected with fuel tank 18 through filter 17, and oil-out divides two-way, and a road is connected with the P mouth of the first two-bit triplet reversal valve 1, and another road is connected with the second relief valve 16；Second relief valve 16 oil-out is connected with fuel tank 18 through filter 17；First two-bit triplet reversal valve 1 oil-out A is divided into two-way, and a road is connected with P, P1 mouth of three six-way transfer valves 2, and another road is connected with high pressure accumulator 7, and oil-out B is connected with fuel tank 18 by filter 17；The T mouth of three six-way transfer valves 2 and the P mouth of the second two-bit triplet reversal valve 13 are connected, the A mouth of three six-way transfer valves 2 and the P mouth of four position and four-way reversing valves 3 are connected, A1 mouth divides two-way, one tunnel is connected with rotary ink tank 4 rod chamber, and the first double-acting safety valve 11 of leading up to is connected with fuel tank 18 through the second two-bit triplet reversal valve 13；B mouth divides two-way, and a road is connected with rotary ink tank 4 rodless cavity, and the second double-acting safety valve 12 of separately leading up to is connected with fuel tank 18 via the second two-bit triplet reversal valve 13。The P mouth of four position and four-way reversing valves 3 and the A mouth of three six-way transfer valves 2 are connected, and the P mouth of T mouth and the second two-bit triplet reversal valve 13 is connected, and A mouth is connected with the rod chamber of boom cylinder 5, and B mouth is connected with the rodless cavity of boom cylinder 5。The P mouth of the second two-bit triplet reversal valve 13 respectively with the T mouth of reversal valve 2,3, the outlet of double-acting safety valve 11,12 be connected；A mouth is divided into two-way, and a road is connected with the B mouth of the first two-bit triplet reversal valve 1, and a road is connected with fuel tank 18 via filter 17；B mouth is connected with low pressure accumulator 8 by check valve 15。The signal input part of controller 6 respectively with the control crank of reversal valve 2,3, the signal output part of pressure transducer 9,10 be connected。The signal output part of controller 6 is connected with the signal input part of reversal valve 1,13 respectively。Pressure transducer 9,10 is connected with accumulator 8,7 respectively through fluid pressure line。
Compared with prior art the beneficial effects of the utility model are:
1, this utility model achieves and makes when transforming less to original loader hydraulic system the output flow of pump and load (outer load and the accumulator) demand volume of equipment match, avoid the energy resource consumption that spill losses causes, reduce the energy resource consumption that restriction loss causes, improve overall efficiency。
2, this utility model achieves and makes Constant Pump System have the energy-saving effect identical with variable pump systems。Native system have employed contamination resistance dosing pump stronger, lower-cost, reduces manufacturing cost and maintenance cost。Simultaneously by accumulator Absorbing hydraulic pulsation, improve stability and the reliability of hydraulic system, improve the component fatigue life-span。Compared with the load sensitive system adopting variable pump, native system can realize identical energy-saving effect by control。
3, this utility model adopts the low pressure accumulator that power density is higher to reclaim swing arm decline potential energy, is used for driving steering mechanism, further increases capacity usage ratio。
4, this utility model stores energy by accumulator, reduces electromotor installed power, improves complete machine economy。
5, in this utility model, hydraulic system, due to the existence of accumulator, reduces work clothes and sets up the time of pressure, improve the work efficiency of complete machine。
Accompanying drawing explanation
Fig. 1 is structure of the present utility model composition and operation principle schematic diagram。
Fig. 2 is that this utility model receives under bucket operating mode energy transfer route figure under the independent powered mode of high pressure accumulator。
Fig. 3 is that this utility model receives under bucket operating mode energy transfer route figure under high pressure accumulator and the common powered mode of dosing pump。
Fig. 4 is energy transfer route figure under the independent powered mode of high pressure accumulator under this utility model moved arm lifting operating mode。
Fig. 5 is energy transfer route figure under high pressure accumulator and the common powered mode of dosing pump under this utility model moved arm lifting operating mode。
Fig. 6 is energy transfer route figure under the independent powered mode of high pressure accumulator under this utility model discharging operating mode。
Fig. 7 is energy transfer route figure under high pressure accumulator and the common powered mode of dosing pump under this utility model discharging operating mode。
Fig. 8 is that under this utility model swing arm decline operating mode, under the independent powered mode of high pressure accumulator, low pressure accumulator reclaims potential energy energy transfer route figure。
Fig. 9 is that under this utility model swing arm decline operating mode, under the independent powered mode of high pressure accumulator, low pressure accumulator does not reclaim potential energy energy transfer route figure。
Figure 10 is that under this utility model swing arm decline operating mode, under high pressure accumulator and the common powered mode of dosing pump, low pressure accumulator does not reclaim potential energy energy transfer route figure。
Detailed description of the invention
Refer to shown in Fig. 1 to Figure 10, for embodiment of the present utility model, this embodiment is made up of electromotor 21, power transmission shaft 20, filter 17, fuel tank 18, dosing pump 19, two-bit triplet reversal valve, banked direction control valves, rotary ink tank 4, boom cylinder 5, controller 6, relief valve, accumulator, check valve 15, double-acting safety valve, pressure transducer。Described banked direction control valves includes three six-way transfer valves 2, four position and four-way reversing valve 3。Described two-bit triplet reversal valve includes first two-bit triplet reversal valve the 1, second two-bit triplet reversal valve 13。Described relief valve includes first relief valve the 14, second relief valve 16。Described accumulator includes high pressure accumulator 7 and low pressure accumulator 8。Described double-acting safety valve includes first double-acting safety valve the 11, second double-acting safety valve 12。Described pressure transducer includes first pressure transducer the 9, second pressure transducer 10。Described electromotor 21 is connected with dosing pump 19 by power transmission shaft 20；Described dosing pump 19 oil-in is connected with fuel tank 18 through filter 17, and oil-out divides two-way, and a road is connected with the P mouth of the first two-bit triplet reversal valve 1, and another road is connected with the second relief valve 16；Second relief valve 16 oil-out is connected with fuel tank 18 through filter 17；First two-bit triplet reversal valve 1 oil-out A is divided into two-way, and a road is connected with P, P1 mouth of three six-way transfer valves 2, and another road is connected with high pressure accumulator 7, and oil-out B is connected with fuel tank 18 by filter 17；The T mouth of three six-way transfer valves 2 and the P mouth of the second two-bit triplet reversal valve 13 are connected, the A mouth of three six-way transfer valves 2 and the P mouth of four position and four-way reversing valves 3 are connected, A1 mouth divides two-way, one tunnel is connected with rotary ink tank 4 rod chamber, and the first double-acting safety valve 11 of leading up to is connected with fuel tank 18 through the second two-bit triplet reversal valve 13；B mouth divides two-way, and a road is connected with rotary ink tank 4 rodless cavity, and the second double-acting safety valve 12 of separately leading up to is connected with fuel tank 18 via the second two-bit triplet reversal valve 13。The P mouth of four position and four-way reversing valves 3 and the A mouth of three six-way transfer valves 2 are connected, and the P mouth of T mouth and the second two-bit triplet reversal valve 13 is connected, and A mouth is connected with the rod chamber of boom cylinder 5, and B mouth is connected with the rodless cavity of boom cylinder 5。The P mouth of the second two-bit triplet reversal valve 13 respectively with the T mouth of reversal valve 2,3, the outlet of double-acting safety valve 11,12 be connected；A mouth is divided into two-way, and a road is connected with the B mouth of the first two-bit triplet reversal valve 1, and a road is connected with fuel tank 18 via filter 17；B mouth is connected with low pressure accumulator 8 by check valve 15。The signal input part of controller 6 respectively with the control crank of reversal valve 2,3, the signal output part of pressure transducer 9,10 be connected。The signal output part of controller 6 is connected with the signal input part of reversal valve 1,13 respectively。Pressure transducer 9,10 is connected with accumulator 8,7 respectively through fluid pressure line。
Work process of the present utility model and principle are as follows:
1, operating mode is inserted:
Loader is straight-line travelling under the driving of running gear, scraper bowl is horizontally inserted material, when scraper bowl enters stockpile until being sufficiently loaded with material, halt, in the process, three six-way transfer valve 2, four position and four-way reversing valves 3 are all operated in middle position respectively, first two-bit triplet reversal valve 1 is operated in right position, and the second two-bit triplet reversal valve 13 is operated in left position, rotary ink tank 4 and boom cylinder 5 locking, high pressure accumulator 7 and low pressure accumulator 8 are in maintenance pressure state, not outwardly energy supply。Fluid is entered fuel tank by the first two-bit triplet reversal valve 1 by dosing pump 19 under the driving of electromotor 21, and now dosing pump 19 is in unloading condition。
According to actual condition, loader meets non-loose material in inserting operating mode, and during the bigger situation of demand spading power, driver can be operated by rotary ink tank 4 to shake scraper bowl, makes material loosen, loads material in single cycle as much as possible。Three six-way transfer valves 2 are by pilot control in the process, and aperture is regulated and controled voluntarily by driver；Now controller 6 measures the pressure in high pressure accumulator 7 by the second pressure transducer 10, calculates the rate of change of pressure in accumulator, detects the operation handle angle (angle in operation handle and its home position) of three six-way transfer valves 2 simultaneously:
(1) if now operation handle angle is not 0, then illustrate that three six-way transfer valves 2 are operated in left position or right position, now controller 6 calculates pressure change rate by the input signal of the second pressure transducer 10, if predicting high pressure accumulator 7 force value subsequent time more than the low pressure limit value set by calculating, and pressure change rate is more than rate of change lower limit corresponding under corresponding operating handle angle in high pressure accumulator 7, illustrate that high pressure accumulator 7 self-energy is enough to drive rotary ink tank, so now the first two-bit triplet reversal valve 1 is operated in right position, dosing pump 19 continues off-load, reversal valve 3, 13 are failure to actuate, rotary ink tank 4 works and is driven by high pressure accumulator 7 completely, rotary ink tank fuel feeding is adjusted by controlling the aperture of three six-way transfer valves 2 by driver in the process。
(2) if now operation handle angle is not 0, then illustrate that three six-way transfer valves 2 are operated in left position or right position, now controller 6 calculates pressure change rate by the input signal of the second pressure transducer 10, if by calculating prediction high pressure accumulator 7 force value subsequent time less than low pressure limit value set in advance, then illustrate that possessing energy in accumulator independent under cutting off power situation cannot drive equipment to complete a state of cyclic operation；If the energy storage pressure rate of change lower limit that in high pressure accumulator 7, pressure change rate is corresponding lower than under corresponding operating handle angle, then illustrating that rotating bucket speed declines, accumulator cannot provide enough flow to ensure the speed of rotating bucket。So both forecast pressure value and pressure change rate have one less than lower limit, it is accomplished by dosing pump 19 for hydraulic system energy supply, first two-bit triplet reversal valve 1 is operated in left position under the driving of controller 6, build due to dosing pump when the effect of the first two-bit triplet reversal valve 1 internal check valve is to prevent dosing pump 19 from accessing and press through the action sluggishness caused in journey, three six-way transfer valves 2 are operated in left position or right position under pilot control, four position and four-way reversing valves 3 are operated in middle position, and the second two-bit triplet reversal valve 13 is operated in left position。Now high pressure accumulator 7 and dosing pump 19 are hydraulic system fuel feeding jointly, owing to high pressure accumulator 7 still possesses the energy of a satisfied state of cyclic operation, so dosing pump will not preferentially to accumulator energy supply。In the process, if the big pressure of rotary ink tank demand volume is little, then high pressure accumulator 7 and dosing pump 19 are commonly fed hydraulic oil；If the little pressure of rotating bucket hydraulic cylinder demand volume is big, then high pressure accumulator 7 absorbs and comes from the flow that dosing pump 19 is unnecessary, ensure not produce spill losses, and once the first two-bit triplet reversal valve 1 is operated in left position, until the force value of high pressure accumulator 7 reaches upper pressure limit value set in advance, first two-bit triplet reversal valve 1 always works at left position, preventing frequent movement from bringing unnecessary restriction loss, rotary ink tank 4 fuel feeding is adjusted by controlling the aperture of three six-way transfer valves 2 by driver in the process。
(3) if now operation handle angle is 0, then illustrating that scraper bowl stops shake, reversal valve 2,3 is all operated in middle position；Controller 6 detects the feedback signal of the first two-bit triplet reversal valve 1 and the pressure of high pressure accumulator 7, if the first two-bit triplet reversal valve 1 is operated in left position and high pressure accumulator 7 pressure lower than higher limit, then dosing pump 19 fills energy until energy storage pressure reaches higher limit to high pressure accumulator 7, then controller 6 drives the first two-bit triplet reversal valve 1 to be operated in right position, dosing pump 19 off-load, accumulator keeps pressure；If the first two-bit triplet reversal valve 1 is operated in left position and high pressure accumulator 7 pressure reaches higher limit, then controller 6 drives the first two-bit triplet reversal valve 1 to be operated in right position, dosing pump off-load, and accumulator keeps pressure；If the first two-bit triplet reversal valve 1 is operated in right position, then keeping original state, dosing pump 19 off-load, accumulator keeps pressure。
2, bucket operating mode is received:
After insertion operating mode completes, loader moves on, and three six-way transfer valves 2 of pilot control are operated in right position, rotary ink tank 4 rodless cavity oil-feed, and rod chamber is fuel-displaced, and rotary ink tank drives scraper bowl to turn over。In this operating mode, scraper bowl is subject to self gravitation, the gravity of material, material is to the resistance of bucket motions and all reaches maximum, and now machining device hydraulic system is operated in high-pressure low-flow state。
Under this operating mode, controller 6 by detect the operation handle angle of three six-way transfer valves 2, high pressure accumulator 7 pressure, calculating high pressure accumulator 7 pressure change rate drive the first two-bit triplet reversal valve 1 to work, the flow making dosing pump 19 matches with load (live load and accumulator) demand volume, it is to avoid overflow。Specific implementation process is as follows, and it is not 0 that controller 6 detects that three six-way transfer valves 2 operate handle angle, detects the pressure of high pressure accumulator 7 again through the second pressure transducer 10 and calculates pressure change rate, having following situation:
First two-bit triplet reversal valve 1 initial time is operated in right position:
The operation handle angle of (1) three six-way transfer valve 2 is not 0, controller 6 is by calculating prediction high pressure accumulator 7 force value subsequent time more than low pressure limit value set in advance and energy storage pressure rate of change more than energy storage pressure rate of change lower limit corresponding under corresponding operating handle angle, illustrate that high pressure accumulator 7 self-energy is enough to drive rotary ink tank 4, so now the first two-bit triplet reversal valve 1 is operated in right position, dosing pump 19 continues off-load, four position and four-way reversing valves 3 are operated in middle position, second two-bit triplet reversal valve 13 is operated in left position, rotary ink tank work is driven by high pressure accumulator 7 completely。
The operation handle angle of (2) three six-way transfer valves 2 is not 0, controller 6 calculates the pressure change rate of high pressure accumulator 7 by the output signal of the second pressure transducer 10, if by calculating prediction energy storage pressure value subsequent time less than low pressure limit value set in advance, then illustrate that possessing energy in accumulator independent under cutting off power situation cannot drive equipment to complete a state of cyclic operation；If the energy storage pressure rate of change lower limit that in accumulator, pressure change rate is corresponding lower than under corresponding operating handle angle, then illustrating that accumulator supply capability declines, accumulator cannot provide enough flow to ensure the speed of rotating bucket。So both forecast pressure value or pressure change rate have one less than lower limit, being accomplished by dosing pump is hydraulic system energy supply, first two-bit triplet reversal valve 1 is operated in left position under the driving of controller 6, four position and four-way reversing valves 3 are operated in middle position, and the second two-bit triplet reversal valve 13 is operated in left position。Now high pressure accumulator 7 and dosing pump 19 are hydraulic system fuel feeding jointly, owing to high pressure accumulator 7 still possesses the energy of a satisfied state of cyclic operation, so dosing pump 19 will not preferentially to high pressure accumulator 7 energy supply。In the process, rotary ink tank 4 is in heavy duty low discharge state, high pressure accumulator 7 absorbs the unnecessary flow coming from dosing pump 19, ensure not produce spill losses, and once the first two-bit triplet reversal valve 1 is operated in left position, until the force value of high pressure accumulator 7 reaches upper pressure limit value set in advance, the first two-bit triplet reversal valve 1 always works at left position, it is prevented that frequent movement brings unnecessary restriction loss；When the force value of high pressure accumulator 7 reaches upper pressure limit value set in advance, the first two-bit triplet reversal valve 1 is operated in right position, and high pressure accumulator 7 starts individually to system energy supply。Rotary ink tank 4 fuel feeding is adjusted by controlling the aperture of three six-way transfer valves 2 by driver in the process。
First two-bit triplet reversal valve 1 initial time is operated in left position:
The operation handle angle of (3) three six-way transfer valves 2 is not 0, high pressure accumulator 7 and dosing pump 19 are hydraulic system fuel feeding jointly, in the process, rotary ink tank is in heavy duty low discharge state, high pressure accumulator 7 absorbs the unnecessary flow coming from dosing pump 19, ensure not produce spill losses, and first two-bit triplet reversal valve 1 be operated in left position, until the force value of high pressure accumulator 7 reaches upper pressure limit value set in advance, first two-bit triplet reversal valve 1 always works at left position, it is prevented that frequent movement brings unnecessary restriction loss；When the force value of high pressure accumulator 7 reaches upper pressure limit value set in advance, the first two-bit triplet reversal valve 1 is operated in right position, and high pressure accumulator 7 starts, individually to system energy supply, to enter 2 (1) discrimination models。Rotary ink tank 4 fuel feeding is adjusted by controlling the aperture of three six-way transfer valves 2 by driver in the process。
Operating mode 2 (1), 2 (2), 2 (3) moves in circles until scraper bowl is received bucket and reached inclination maximum, and three six-way transfer valves 2 of pilot control are operated in middle position, receive bucket and complete。
3, moved arm lifting operating mode
After receipts bucket completes, pilot control four position and four-way reversing valve 3 is operated in right position, utilizes Throttle Principle to control the speed of moved arm lifting。Requiring that boom cylinder 5 quick and stable is moved in the process, boom cylinder is subject in the gravity of material and motor process the inertia force produced。So now machining device hydraulic system is in high-pressure high-flow state, in this process and be absent from spill losses。
Under this operating mode, controller 6 by detect the operation handle angle of four position and four-way reversing valves 3, high pressure accumulator 7 pressure, calculating high pressure accumulator 7 pressure change rate drive the first two-bit triplet reversal valve 1 to work, making dosing pump 19 and high pressure accumulator 7 is boom cylinder 5 fuel feeding, it is achieved the quick lifting of material。Specific implementation process is as follows, and controller 6 detects that four position and four-way reversing valves 3 are operated in right position, detects the pressure of high pressure accumulator 7 again through the second pressure transducer 10 and calculates pressure change rate, having following situation:
First two-bit triplet reversal valve 1 initial time is operated in right position:
The operation handle angle of (1) four position and four-way reversing valve 3 is not 0, controller 6 calculates prediction high pressure accumulator 7 force value subsequent time more than low pressure limit value set in advance by the output signal of the second pressure transducer 10, and high pressure accumulator 7 pressure change rate is more than rate of change lower limit corresponding under corresponding operating handle angle, illustrate that high pressure accumulator 7 self-energy is enough to drive boom cylinder 5, so now the first two-bit triplet reversal valve 1 is operated in right position, dosing pump 19 continues off-load, three six-way transfer valves 2 are operated in middle position, second two-bit triplet reversal valve 13 is operated in left position, boom cylinder 5 works and is driven by high pressure accumulator 7 completely。
The operation handle angle of (2) four position and four-way reversing valves 3 is not 0, controller 6 calculates pressure change rate by the output signal of pressure transducer 10, if by calculating prediction high pressure accumulator 7 force value subsequent time less than low pressure limit value set in advance, then illustrate that possessing energy in high pressure accumulator 7 independent under cutting off power situation cannot drive equipment to complete a state of cyclic operation；If the energy storage pressure rate of change lower limit that in high pressure accumulator 7, pressure change rate is corresponding lower than under corresponding operating handle angle, then illustrating that accumulator supply capability declines, accumulator cannot provide enough flow to ensure the speed of boom cylinder 5。So both forecast pressure value or pressure change rate have one less than lower limit, it is accomplished by dosing pump 19 for hydraulic system energy supply, first two-bit triplet reversal valve 1 is operated in left position under the driving of controller 6, four position and four-way reversing valves 3 are operated in right position, and the second two-bit triplet reversal valve 13 is operated in left position。Now high pressure accumulator 7 and dosing pump 19 are hydraulic system fuel feeding jointly, owing to high pressure accumulator 7 still possesses the energy of a satisfied state of cyclic operation, so dosing pump 19 will not preferentially to accumulator energy supply。In the process, boom cylinder is in the big flow status of heavy duty, high pressure accumulator 7 and dosing pump 19 are common to boom cylinder fuel feeding, high pressure accumulator 7 absorption pressure vibration simultaneously, ensure the quick and stable lifting of boom cylinder, and once the first two-bit triplet reversal valve 1 is operated in left position, until the force value of high pressure accumulator 7 reaches upper pressure limit value set in advance, first two-bit triplet reversal valve 1 always works at left position, it is prevented that frequent movement brings unnecessary restriction loss；When the force value of high pressure accumulator 7 reaches upper pressure limit value set in advance, the first two-bit triplet reversal valve 1 is operated in right position, and high pressure accumulator 7 starts individually to system energy supply。
First two-bit triplet reversal valve 1 initial time is operated in left position:
The operation handle angle of (3) four position and four-way reversing valves 3 is not 0, high pressure accumulator 7 and dosing pump 19 are hydraulic system fuel feeding jointly, owing to boom cylinder 5 is in the big flow status of heavy duty, high pressure accumulator 7 is common with dosing pump 19 to boom cylinder 5 fuel feeding, ensure the quick and stable lifting of swing arm, and first two-bit triplet reversal valve 1 be operated in left position, until the force value of high pressure accumulator 7 reaches upper pressure limit value set in advance, first two-bit triplet reversal valve 1 always works at left position, it is prevented that frequent movement brings unnecessary restriction loss；When the force value of high pressure accumulator 7 reaches upper pressure limit value set in advance, the first two-bit triplet reversal valve 1 is operated in right position, and high pressure accumulator 7 starts, individually to system energy supply, to enter 3 (1) discrimination models。Boom cylinder fuel feeding is adjusted by controlling the aperture of four position and four-way reversing valves 3 by driver in the process。
Operating mode 3 (1), 3 (2), 3 (3) moves in circles until scraper bowl rises to demand height, and pilot control four position and four-way reversing valve 3 is operated in middle position, and moved arm lifting completes。
4, discharging operating mode:
Moved arm lifting is after predetermined altitude, and pilot control running gear makes loader arrive precalculated position, handles three six-way transfer valves 2, utilizes Throttle Principle to control the speed of rotating bucket oil cylinder of loading machine, utilizes material self gravitation in scraper bowl to realize discharging。Self resistance in inertia force that rotary ink tank is subject in the gravity of material, motor process producing and equipment motor process。In the process, quality of material changes quickly, so now machining device hydraulic system is in underloading flow status, and is absent from spill losses。
Under this operating mode, three six-way transfer valves 2 are operated in left position, and rotary ink tank 4 rod chamber oil-feed, rodless cavity is fuel-displaced。Controller 6 by detect the operation handle angle of three six-way transfer valves 2, high pressure accumulator 7 pressure, calculating high pressure accumulator 7 pressure change rate drive the first two-bit triplet reversal valve 1 to work, making dosing pump 19, high pressure accumulator 7 is rotary ink tank 4 fuel feeding, it is achieved quickly discharging material。Specific implementation process is as follows, and it is not 0 that controller 6 detects that three six-way transfer valves 2 operate handle angle, detects the pressure of high pressure accumulator 7 again through pressure transducer 10 and calculates pressure change rate, having following situation:
First two-bit triplet reversal valve 1 initial time is operated in right position:
The operation handle angle of (1) three six-way transfer valve 2 is not 0, controller 6 is by calculating prediction high pressure accumulator 7 force value subsequent time more than low pressure limit value set in advance, and its pressure change rate is more than rate of change lower limit corresponding under corresponding operating handle angle, illustrate that accumulator self-energy is enough to drive rotary ink tank 4, so now the first two-bit triplet reversal valve 1 is operated in right position, dosing pump 19 continues off-load, three six-way transfer valves 2 are operated in left position, four position and four-way reversing valves 3 are operated in middle position, second two-bit triplet reversal valve 13 is operated in left position, rotary ink tank 4 works and is driven by high pressure accumulator 7 completely。
The operation handle angle of (2) three six-way transfer valves 2 is not 0, controller 6 calculates pressure change rate by the input signal of the second pressure transducer 10, if by calculating prediction high pressure accumulator 7 force value subsequent time less than low pressure limit value set in advance, then illustrate that possessing energy in accumulator independent under cutting off power situation cannot drive equipment to complete a state of cyclic operation；If the pressure change rate lower limit that in high pressure accumulator 7, pressure change rate is corresponding lower than under corresponding operating handle angle, then illustrating that its supply capability declines, accumulator cannot provide enough flow to ensure the speed of rotating bucket。So both forecast pressure value or pressure change rate have one less than lower limit, it is accomplished by dosing pump 19 for hydraulic system energy supply, first two-bit triplet reversal valve 1 is operated in left position under the driving of controller 6, four position and four-way reversing valves 3 are operated in middle position, and the second two-bit triplet reversal valve 13 is operated in left position。Now high pressure accumulator 7 and dosing pump 19 are hydraulic system fuel feeding jointly。In the process, rotary ink tank 4 is in underloading flow status, high pressure accumulator 7 is common with dosing pump 19 to rotary ink tank rod chamber fuel feeding, realize quickly discharging material, and once the first two-bit triplet reversal valve 1 is operated in left position, until the force value of high pressure accumulator 7 reaches upper pressure limit value set in advance, the first two-bit triplet reversal valve 1 always works at left position, it is prevented that frequent movement brings unnecessary restriction loss；When the force value of high pressure accumulator 7 reaches upper pressure limit value set in advance, the first two-bit triplet reversal valve 1 is operated in right position, and high pressure accumulator 7 starts individually to system energy supply。Rotary ink tank 4 fuel feeding is adjusted by controlling the aperture of three six-way transfer valves 2 by driver in the process。
First two-bit triplet reversal valve 1 initial time is operated in left position:
The operation handle angle of (3) three six-way transfer valves 2 is not 0, and high pressure accumulator 7 and dosing pump 19 are hydraulic system fuel feeding jointly。In the process, rotary ink tank 4 is in underloading flow status, high pressure accumulator 7 is common with dosing pump 19 to rotary ink tank rod chamber fuel feeding, realize quickly discharging material, and first two-bit triplet reversal valve 1 be operated in left position, until the force value of high pressure accumulator 7 reaches upper pressure limit value set in advance, the first two-bit triplet reversal valve 1 always works at left position, it is prevented that frequent movement brings unnecessary restriction loss；When the force value of high pressure accumulator 7 reaches upper pressure limit value set in advance, the first two-bit triplet reversal valve 1 is operated in right position, and high pressure accumulator 7 starts, individually to system energy supply, to enter 4 (1) discrimination models。Rotary ink tank 4 fuel feeding is adjusted by controlling the aperture of three six-way transfer valves 2 by driver in the process。
Operating mode 4 (1), 4 (2), 4 (3) moves in circles until scraper bowl discharging is complete, and three six-way transfer valves 2 of pilot control are operated in middle position, receives bucket and completes。
5, unloaded receipts bucket operating mode
After discharging completes, three six-way transfer valves 2 of pilot control are operated in right position, and rotary ink tank 4 rodless cavity oil-feed rod chamber is fuel-displaced, make scraper bowl quickly be recovered to horizontal level under no-load condition。Hydraulic system is in the big flow status of underloading in the process。
Specific implementation process is with reference to receiving bucket operating mode。
6, potential energy operating mode is reclaimed in swing arm decline
After bucket received by scraper bowl, pilot control four position and four-way reversing valve 3 is operated in left 1, and boom cylinder 5 rod chamber oil-feed rodless cavity is fuel-displaced, and swing arm steadily drops to initial position, and under this operating mode, hydraulic system is in the big flow status of underloading。
Under this operating mode, controller 6 by detect the operation handle angle of four position and four-way reversing valves 3, high pressure accumulator 7 pressure, calculating high pressure accumulator 7 pressure change rate drive the first two-bit triplet reversal valve 1 to work, realizing swing arm rapid decrease and carry out energy regenerating simultaneously, the energy of recovery is used for driving steering。Specific implementation process is as follows, controller 6 detects that four position and four-way reversing valves 3 are operated in left 1, detect respectively again through the second, first pressure transducer 10,9 high pressure accumulator 7 and low pressure accumulator 8 pressure and calculate pressure change rate realize swing arm decline and energy regenerating, specifically have following situation:
First two-bit triplet reversal valve 1 initial time is operated in right position:
(1) four position and four-way reversing valve 3 is operated in left 1, and in low pressure accumulator 8, pressure is less than its higher limit:
Controller 6 is by calculating prediction high pressure accumulator 7 force value subsequent time more than low pressure limit value set in advance, and its pressure change rate is more than rate of change lower limit corresponding under corresponding operating handle angle, illustrate that high pressure accumulator 7 self-energy is enough to drive boom cylinder 5, controller 6 detects pressure in low pressure accumulator 8 by the first pressure transducer 9 and, less than its higher limit, illustrates that low pressure accumulator 8 can recover energy simultaneously。So now the first two-bit triplet reversal valve 1 is operated in right position, dosing pump 19 continues off-load, three six-way transfer valves 2 are operated in middle position, second two-bit triplet reversal valve 13 is operated in right position, fluid in boom cylinder 5 rodless cavity is entered in low pressure accumulator 8 by boom cylinder 5 under the effect of high pressure accumulator 7 and self gravitation, it is achieved the recovery of movable arm potential energy。
(2) four position and four-way reversing valves 3 are operated in left 1, and in low pressure accumulator 8, pressure is equal to its higher limit:
Controller 6 is by calculating prediction high pressure accumulator 7 force value subsequent time more than low pressure limit value set in advance, and energy storage pressure rate of change is more than rate of change lower limit corresponding under corresponding operating handle angle, illustrate that high pressure accumulator 7 self-energy is enough to drive boom cylinder 5, controller 6 detects pressure in low pressure accumulator 8 by the first pressure transducer 9 and is equal to its higher limit simultaneously, illustrate that low pressure accumulator 8 cannot continue to recover energy, so now the first two-bit triplet reversal valve 1 is operated in right position, dosing pump 19 continues off-load, three six-way transfer valves 2 are operated in middle position, second two-bit triplet reversal valve 13 is operated in left position, rodless cavity fluid is entered in fuel tank by boom cylinder 5 under high pressure accumulator 7 drives, complete swing arm to decline。
(3) four position and four-way reversing valves 3 are operated in left 1, controller 6 calculates the pressure change rate of high pressure accumulator 7 by the output signal of the second pressure transducer 10, if by calculating prediction high pressure accumulator 7 force value subsequent time less than low pressure limit value set in advance, then illustrate that possessing energy in accumulator cannot drive equipment to complete a state of cyclic operation under cutting off power situation；If the rate of change lower limit that in accumulator, pressure change rate is corresponding lower than under corresponding operating handle angle, then illustrating that accumulator supply capability declines, high pressure accumulator 7 cannot provide enough flow to ensure the speed of boom cylinder 5。So both forecast pressure value and pressure change rate have one less than lower limit, it is accomplished by dosing pump 19 for hydraulic system energy supply, now the first two-bit triplet reversal valve 1 is operated in left position under the driving of controller 6, four position and four-way reversing valves 3 are operated in left 1, when dosing pump 19 starts as system energy supply, continuing to reclaim movable arm potential energy can cause dosing pump 19 input power to increase, do not reach the purpose saving energy, so when the first two-bit triplet reversal valve 1 is operated in left position, the second two-bit triplet reversal valve 13 is operated in left position。Now high pressure accumulator 7 and dosing pump 19 are hydraulic system fuel feeding jointly。In the process, boom cylinder 5 is in the big flow status of underloading, high pressure accumulator 7 and dosing pump 19 are common to boom cylinder fuel feeding, ensure that the quick and stable of boom cylinder declines, and once the first two-bit triplet reversal valve 1 is operated in left position, until the force value of high pressure accumulator 7 reaches upper pressure limit value set in advance, the first two-bit triplet reversal valve 1 always works at left position, it is prevented that frequent movement brings unnecessary restriction loss；When the force value of high pressure accumulator 7 reaches upper pressure limit value set in advance, the first two-bit triplet reversal valve 1 is operated in right position, and high pressure accumulator 7 starts individually to system energy supply。
First two-bit triplet reversal valve 1 initial time is operated in left position:
The operation handle angle of (4) four position and four-way reversing valves 3 is not 0, and high pressure accumulator 7 and dosing pump 19 are hydraulic system fuel feeding jointly, it is ensured that the quick and stable of swing arm declines, and boom cylinder is in the big flow status of underloading。And first two-bit triplet reversal valve 1 be operated in left position, until the force value of high pressure accumulator 7 reaches upper pressure limit value set in advance, the first two-bit triplet reversal valve 1 always works at left position, it is prevented that frequent movement brings unnecessary restriction loss。And the first two-bit triplet reversal valve 1 when being operated in left position, the output for reducing electromotor 21 does not carry out energy regenerating, so the second two-bit triplet reversal valve 13 is operated in left position。When the force value of high pressure accumulator 7 reaches upper pressure limit value set in advance, the first two-bit triplet reversal valve 1 is operated in right position。High pressure accumulator 7 starts, individually to system energy supply, to enter 6 (1), 6 (2) discrimination models。Operating mode 6 (1), 6 (2), 6 (3), 6 (4) moves in circles until scraper bowl drops to demand height, and pilot control four position and four-way reversing valve 3 is operated in middle position, and swing arm has declined。
Claims (3)
1. one kind without spill losses loader hydraulic work system, it is characterized in that: at original electromotor (21), power transmission shaft (20), filter (17), fuel tank (18), dosing pump (19), banked direction control valves, rotary ink tank (4), boom cylinder (5), relief valve, on the structure foundation of double-acting safety valve, the first two-bit triplet reversal valve (1) is installed additional between banked direction control valves and dosing pump (19), high pressure accumulator (7), oil return circuit installs additional low pressure accumulator (8) and the second two-bit triplet reversal valve (13), and use pressure transducer to measure the force value of accumulator respectively；Described banked direction control valves includes three six-way transfer valves (2), four position and four-way reversing valves (3)；Controller (6) signal input part receives the output signal of the first pressure transducer (9), the second pressure transducer (10), three six-way transfer valves (2), four position and four-way reversing valves (3), wherein: three six-way transfer valve (2), four position and four-way reversing valves (3) output function handle angle signals respectively, the first pressure transducer (9), the second pressure transducer (10) signal input part are connected with low pressure accumulator (8), high pressure accumulator (7) respectively by fluid pressure line；Output control signal after signal processing is driven the first two-bit triplet reversal valve (1) by controller (6), the second two-bit triplet reversal valve (13) work。
2. according to claim 1 a kind of without spill losses loader hydraulic work system, it is characterized in that: the high pressure accumulator (7) in loader hydraulic work system can individually drive rotary ink tank (4) and boom cylinder (5), control the first two-bit triplet reversal valve (1) also by controller (6) and be operated in left position, realize dosing pump (19) and high pressure accumulator (7) interflow, it is ensured that the regular event of equipment；In the first two-bit triplet reversal valve (1), install check valve additional, it is to avoid build to press through at dosing pump (19) and journey causes equipment action sluggish simultaneously；The low pressure accumulator (8) installed additional on oil return circuit and the second two-bit triplet reversal valve (13) are used for realizing reclaiming potential energy, between low pressure accumulator (8) and the second two-bit triplet reversal valve (13), install check valve additional, it is to avoid equipment is reversed driving simultaneously；Accumulator and dosing pump all as power source, and can realize the two collaborative work by reversal valve or work independently。
3. according to claim 1 and 2 a kind of without spill losses loader hydraulic work system, it is characterized in that: three six-way transfer valves (2), four position and four-way reversing valves (3) all without in position oil return function, it is possible to achieve high pressure accumulator (7) pressurize reduce restriction loss in the course of the work during equipment attonity。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620040304.5U CN205329757U (en) | 2016-01-16 | 2016-01-16 | No spill losses loader hydraulic pressure work systems |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620040304.5U CN205329757U (en) | 2016-01-16 | 2016-01-16 | No spill losses loader hydraulic pressure work systems |
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| CN205329757U true CN205329757U (en) | 2016-06-22 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105484311A (en) * | 2016-01-16 | 2016-04-13 | 吉林大学 | Hydraulic working system of non-overflow-loss loader and control method of hydraulic working system |
| CN108678045A (en) * | 2018-06-22 | 2018-10-19 | 吉林大学 | A kind of loading pump control hybrid-power hydraulic system and its control method |
| CN110258684A (en) * | 2019-06-21 | 2019-09-20 | 江苏师范大学 | A kind of energy saver of excavator swing arm single cylinder pressure-bearing energy regenerating and recycling |
-
2016
- 2016-01-16 CN CN201620040304.5U patent/CN205329757U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105484311A (en) * | 2016-01-16 | 2016-04-13 | 吉林大学 | Hydraulic working system of non-overflow-loss loader and control method of hydraulic working system |
| CN108678045A (en) * | 2018-06-22 | 2018-10-19 | 吉林大学 | A kind of loading pump control hybrid-power hydraulic system and its control method |
| CN108678045B (en) * | 2018-06-22 | 2023-08-22 | 吉林大学 | Pump control hybrid power hydraulic system of loader and control method thereof |
| CN110258684A (en) * | 2019-06-21 | 2019-09-20 | 江苏师范大学 | A kind of energy saver of excavator swing arm single cylinder pressure-bearing energy regenerating and recycling |
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Granted publication date: 20160622 Effective date of abandoning: 20180112 |