CN203176035U - Straight-line walking valve and control system achieving straight-line walking of excavator - Google Patents
Straight-line walking valve and control system achieving straight-line walking of excavator Download PDFInfo
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- CN203176035U CN203176035U CN 201320064657 CN201320064657U CN203176035U CN 203176035 U CN203176035 U CN 203176035U CN 201320064657 CN201320064657 CN 201320064657 CN 201320064657 U CN201320064657 U CN 201320064657U CN 203176035 U CN203176035 U CN 203176035U
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Abstract
Provided are a straight-line walking valve and a control system achieving straight-line walking of an excavator. The straight-line walking valve comprises a valve body, a screw plug, a straight-walking valve rod, a one-way valve, a one-way valve spring, an outer spring, a limiting rod, an inner spring, a blanking cap and a spring seat, wherein the screw plug, the straight-walking valve rod, the one-way valve, the one-way valve spring, the outer spring, the limiting rod, the inner spring, the blanking cap and the spring seat are arranged in the valve body. The left end of the straight-walking valve rod is located through the screw plug, the spring seat is fixedly arranged at the right end of the straight-walking valve rod, the screw plug is connected at the left end of the valve body in a threaded mode, the outer spring and the inner spring are coaxially sleeved on the limiting rod, the right end of the outer spring acts on the inner hole of the blanking cap, the left end of the outer spring acts on the step of the right end of the spring seat, the right end of the inner spring acts on the inner hole of the blanking cap, and the left end of the inner spring acts on the step of the right end of the spring seat. Part of hydraulic oil of a main pump of the straight-line walking valve and the control system achieving the straight-line walking of the excavator supplies oil for an actuating mechanism of the excavator, the other part of oil flows together with the hydraulic oil of the other main pump, oil is mutually supplied for a left walking motor and a right walking motor, and therefore the excavator is guaranteed to achieve the performance of straight-line walking simultaneously with carrying out operations.
Description
Technical field
The utility model relates to a kind of straight line moving valve, and especially a kind of excavator of can realizing is carrying out other operations and realizing that simultaneously the straight line moving valve of straight line moving reaches the control system that realizes straight line moving in excavator.
Background technique
Hydraulic shovel is widely used in the engineering constructions such as hydraulic engineering, communications and transportation, power engineering and mine excavation at present, working environment is more abominable, when excavator is absorbed in the hole, works on the bigger slope of the gradient or during other special operation condition, require excavator can realize this composite move of limit straight line moving (advance, retreat) limit operation (as swing arm, excavation, revolution etc.).The main valve that some excavator is used, adopt a main pump to left lateral walk, revolution, swing arm II and dipper I fuel feeding, the another one main pump to right lateral walk, standby, swing arm I, scraper bowl and dipper II fuel feeding, when two main pumps are given left and right sides running motor fuel feeding respectively, can realize straight line moving, be in job state and work as excavator, because one of them pump should be given the running motor fuel feeding, give again and carry out the oil cylinder fuel feeding, this just is difficult to guarantee that the fuel delivery of left and right sides running motor equates that the linear driving performance of excavator just can't guarantee.
Summary of the invention
At the problems referred to above that existing excavator exists, the utility model provides a kind of can realize the straight line moving valve of excavator straight line moving and the control system that this valve is realized excavator straight line moving function.
The technical solution that the utility model technical solution problem adopts is:
A kind of straight line moving valve comprises valve body 28 and is arranged on plug screw 21, craspedodrome valve rod 24, one-way valve 23, check valve spring 22, outer spring 18, position-limited lever 19, inner spring 20, blanking cover 17, spring seat 80 in the valve body 28;
Described craspedodrome valve rod 24 left ends are by plug screw 21 location, and spring seat 80 is fixed on the right-hand member of craspedodrome valve rod 24; Described plug screw 21 is spirally connected with valve body 28 left ends;
Described outer spring 18 and inner spring 20 coaxial being enclosed within on the position-limited lever 19;
Described outer spring 18 right-hand members act on the endoporus of blanking cover 17, and its left end acts on the step of spring seat 80 right-hand members;
Described inner spring 20 right-hand members act on the endoporus of blanking cover 17, and its left end acts on the step of spring seat 80 right-hand members;
From left to right form x chamber 43, oil duct gap 42, c chamber 33, P1h chamber 36, oil groove 25, P1g chamber 37, oil groove 26, P1j chamber 38, P2 between described craspedodrome valve rod 24 and the valve body 28 successively and enter chamber 41, oil groove 27, P2h chamber 39; Described x chamber 43 communicates with c chamber 33 by oil duct gap 42;
The right part of described craspedodrome valve rod 24 is provided with blind hole, and described blind hole is disposed with z oil duct 79, t chamber 75, r chamber 76 from left to right; Described t chamber 75 communicates with P1g chamber 37 by z oil duct 79;
When craspedodrome valve rod 24 was in diverse location, the break-make relation between chamber and the chamber was as follows:
[1] craspedodrome valve rod 24 is given a definition at the attonity state and is valve rod first working position, described P2 enters chamber 41 and communicates with the m chamber 72 of one-way valve I6, P2h chamber 39 and P2 advance the oil groove 27 that chamber 41 links to each other and are cut off by craspedodrome valve rod 24, the oil groove 26 that P1g chamber 37 links to each other with P1j chamber 38 is cut off by craspedodrome valve rod 24, P1h chamber 36 and P1g chamber 37 all communicate with the k chamber 71 of one-way valve II 7 by oil groove 25, one-way valve 23 spools move to right, t chamber 75 communicates with r chamber 76, r chamber 76 is entered chamber 41 with P2 and is cut off by craspedodrome valve rod 24, and it is obstructed that P1g37 and P2 enter chamber 41;
When [2] x chamber 43 hydraulic oil promotion craspedodrome valve rod 24 overcomes inner spring 20, outer spring 18 active forces move right and is pressed on position-limited lever 19 on the blanking cover 17, craspedodrome valve rod 24 residing location definitions are valve rod second working position, described P1g chamber 37 communicates with P1j chamber 38 by oil groove 26, the oil groove 25 that P1h chamber 36 links to each other with P1g chamber 37 is cut off by craspedodrome valve rod 24, P2 enters chamber 41 and communicates with P2h chamber 39 by oil groove 27, r chamber 76 is entered chamber 41 with P2 and is communicated, and the hydraulic oil of P1g37 enters P2 through z oil duct 79, t chamber 75, r chamber 76 and enters chamber 41;
Described blanking cover 17 is spirally connected with valve body 28 right-hand members;
Described one-way valve 23 is arranged in the blind hole of craspedodrome valve rod 24 right sides, and its left side and blind hole constitute sealing pair and be used for cutting off t chamber 75 and r chamber 76, and its right-hand member withstands on the step of spring seat 80 left ends by check valve spring 22; Described one-way valve left side is the ball face sealing face, and described blind hole is the conical surface seal face.
Also comprise two-position three way pilot valve 1, pioneer pump hydraulic fluid port P in the above-mentioned valve body 28
G, throttle valve NZ
X3, throttle valve NZ
Y4, one-way valve I6, one-way valve II 7, main safety valve 8.
A kind of excavator straight line moving control system comprises the first oil hydraulic pump P
154, the second oil hydraulic pump P
255, pioneer pump 56, throttle valve NZ
X3, throttle valve NZy4, straight line moving valve 5, two-position three way pilot valve 1, one-way valve I6, one-way valve II 7, main safety valve 8, left lateral are walked control valve 57, rotary control valve 58, swing arm II control valve 59, dipper I control valve 60, right lateral and are walked control valve 65, service valve 64, swing arm I control valve 63, scraper bowl control valve 62, dipper II control valve 61 and working connection and first rodding;
When described craspedodrome valve rod 24 is in valve rod first working position, the first oil hydraulic pump P
1The 54 part hydraulic oil that flow out are flowed through oil groove 25 to P1h chamber 36 and k chamber 71 by interface 11 through P1g chamber 37, the hydraulic oil in the inflow P1h chamber 36 flows to left lateral through interface 16 again and walks control valve 57; The second oil hydraulic pump P
255 part hydraulic oil flows to P2 by interface 14 and enters chamber 41 and m chamber 72;
When described craspedodrome valve rod 24 is in valve rod second working position, the first oil hydraulic pump P
1The 54 part hydraulic oil that flow out flow into P1g chamber 37 by interface 11, enter the hydraulic oil separated into two parts oil in P1g chamber 37, a part is flowed through oil groove 26 to P1j chamber 38, give service valve 64, swing arm I control valve 63, scraper bowl control valve 62, dipper II control valve 61 fuel feeding through interface 15 again, another part hydraulic oil flows to t chamber 75 through z oil duct 79, one-way valve 23 is open, and t chamber 75 communicates with r chamber 76, and the hydraulic oil in P1g chamber 37 is flowed through and entered P2 behind z oil duct 79, t chamber 75, the r chamber 76 and enter chamber 41; The second oil hydraulic pump P
255 part hydraulic oil flows into P2 by interface 14 and advances chamber 41 and the first oil hydraulic pump P
1Behind 54 the part hydraulic oil interflow, to P2h chamber 39, the hydraulic oil in the P2h chamber 39 of flowing through flows to left lateral by interface 13 and walks control valve 57 by oil groove 27.
The c chamber 33 of described straight line moving valve 5 communicates with the y chamber 48 of described two-position three way pilot valve 1 by L oil duct 51;
The described first oil hydraulic pump P
154 walk control valve 57, rotary control valve 58, swing arm II control valve 59, dipper I control valve 60 by working connection A81 and described left lateral is connected;
The described second oil hydraulic pump P
255 walk control valve 65, service valve 64, swing arm I control valve 63, scraper bowl control valve 62, dipper II control valve 61 by working connection B82 and described right lateral is connected;
The spool of the spool of described throttle valve NZX3 and throttle valve NZy4 is all by described pioneer pump oil inlet P
G2 are connected with described guide's oil hydraulic pump 56, described guide's oil hydraulic pump 56 is connected with digger revolving control valve 58, swing arm II control valve 59, dipper I control valve 60, dipper II control valve 61, scraper bowl control valve 62, swing arm I control valve 63, standby control valve 64 with described throttle valve NZX3 by described first rodding, described pioneer pump simultaneously by first rodding walk motor control valve 57 with described throttle valve NZy4 with the excavator left lateral, right lateral is walked motor control valve 65 and is connected.
The beneficial effects of the utility model are:
Realized that by the straight line moving valve two oil pump feed modes are by a main pump (right side) running motor, rotary motor, dipper oil hydraulic cylinder fuel feeding left, another main pump (left side) running motor, swing arm oil hydraulic cylinder, scraper bowl oil hydraulic cylinder fuel feeding to the right switches to a part of hydraulic oil of a main pump to the actuating mechanism of excavating machine fuel feeding, another part oil collaborates with the hydraulic oil of another main pump, common left, right lateral walks the mode of motor fuel feeding, guaranteed that like this excavator realizes the performance of straight line moving simultaneously in operation.Secondly, the one-way valve in the straight line moving valve and the sealing configuration between the valve rod adopt sphere to the conical surface type sealing means, effectively reduce wearing and tearing to the influence of its sealing pair, have improved the functional reliability of this device.In addition, the straight line moving valve is installed in the main valve, forms the integral multi-way valve, has saved the limited installing space of excavator.
Description of drawings
Fig. 1 is the straight line moving valve piece External view that the utility model straight line moving valve and main safety valve, two-position three way pilot valve, throttle valve and guide oil import are formed;
Fig. 2 is straight line moving valve piece and existing excavator main control valve piece interface schema;
Fig. 3 is Fig. 1 cathetus walking valve piece sectional view A-A;
Fig. 4 is Fig. 1 cathetus walking valve piece sectional view B-B;
Fig. 5 is the utility model excavator straight line moving control system figure;
Reference character: 1-two-position three way pilot valve, 2-pioneer pump hydraulic fluid port P
G, 3-throttle valve NZ
X, 4-throttle valve NZ
Y, 5-straight line moving valve, 6-one-way valve I, 7-one-way valve II, 8-main safety valve, the 9-interface, 10-interface, 11-interface, 12-interface, the 13-interface, 14-interface, 15-interface, 16-interface, the 17-blanking cover, 18-outer spring, 19-position-limited lever, 20-inner spring, the 21-plug screw, 22-spring, 23-one-way valve, 24-craspedodrome valve rod, the 25-oil groove, 26-oil groove, 27-oil groove, 28-valve body, 29, the 31-check valve spring, 30,32-one-way valve spool, 33-c chamber, 34-e oil duct, the 35-f oil duct, 36-P1h chamber, 37-P1g chamber, 38-P1j chamber, the 39-P2h chamber, the 40-d chamber, 41-P2 enters the chamber, 42 oil duct gaps, the 43-x chamber, 44-f hydraulic fluid port, 45-a chamber, 46-valve rod, the 47-b chamber, 48-y chamber, 49-oil duct, 50-v chamber, the 51-L oil duct, 52-s oil duct, 53-q oil duct, the 54-first oil hydraulic pump P
1, the 55-second oil hydraulic pump P
2, 56-pioneer pump P
G, the 57-left lateral is walked control valve, 58-rotary control valve, 59-swing arm II control valve, 60-dipper I control valve, 61-dipper II control valve, 62-scraper bowl control valve, 63-swing arm I control valve, the 64-service valve, the 65-right lateral is walked control valve, 66-return opening DrI, 67-u oil duct, 68-spring, 69-i oil duct, 70-return opening Dr III, the 71-k chamber, 72-m chamber, 73-p bypass channel, 74-o chamber, the 75-t chamber, 76-r chamber, 77-w oil duct, 78-s intersection point, the 79-z oil duct, 80-spring seat, 81-working connection A, 82-working connection B;
P1 meets the first oil hydraulic pump P
1, P2 meets the second oil hydraulic pump P
2PG connects guide's oil hydraulic pump; DrI and Dr III connected tank, the R1 connected tank.
Embodiment
A kind of straight line moving valve comprises valve body 28 and is arranged on plug screw 21, craspedodrome valve rod 24, one-way valve 23, check valve spring 22, outer spring 18, position-limited lever 19, inner spring 20, blanking cover 17, spring seat 80 in the valve body 28;
Straight line moving valve 5 is fixed in the straight line moving valve piece, and described craspedodrome valve rod 24 left ends are by plug screw 21 location, and spring seat 80 is fixed on the right-hand member of craspedodrome valve rod 24; Described plug screw 21 is spirally connected with valve body 28 left ends;
Described outer spring 18 and inner spring 20 coaxial being enclosed within on the position-limited lever 19;
Described outer spring 18 right-hand members act on the endoporus of blanking cover 17, and its left end acts on the step of spring seat 80 right-hand members;
Described inner spring 20 right-hand members act on the endoporus of blanking cover 17, and its left end acts on the step of spring seat 80 right-hand members;
From left to right form x chamber 43, oil duct gap 42, c chamber 33, P1h chamber 36, oil groove 25, P1g chamber 37, oil groove 26, P1j chamber 38, P2 between described straight line moving valve 5 and the valve body 28 successively and enter chamber 41, oil groove 27, P2h chamber 39; Described x chamber 43 communicates with c chamber 33 by oil duct gap 42;
The right part of described craspedodrome valve rod 24 is provided with blind hole, and described blind hole is disposed with z oil duct 79, t chamber 75, r chamber 76 from left to right; Described t chamber 75 communicates with P1g chamber 37 by z oil duct 79;
When craspedodrome valve rod 24 was in diverse location, the break-make relation between chamber and the chamber was as follows:
[1] craspedodrome valve rod 24 is given a definition at the attonity state and is valve rod first working position, described P2 enters chamber 41 and communicates with the m chamber 72 of one-way valve I6, P2h chamber 39 and P2 advance the oil groove 27 that chamber 41 links to each other and are cut off by craspedodrome valve rod 24, at this moment, it is obstructed that P2h chamber 39 and P2 enter chamber 41, the oil groove 26 that P1g chamber 37 links to each other with P1j chamber 38 is cut off by craspedodrome valve rod 24, P1h chamber 36 and P1g chamber 37 all communicate with the k chamber 71 of one-way valve II 7 by oil groove 25, the hydraulic oil in P1g chamber 37 flows to t chamber 75 through z oil duct 79, t chamber 75 hydraulic oil promote one-way valve 23 spools and overcome spring 22 active forces, one-way valve 23 spools are moved to right, the t chamber communicates with r chamber 76, r chamber 76 is entered chamber 41 with P2 and is cut off by craspedodrome valve rod 24, this moment P1g37 and P2 to enter chamber 41 obstructed, the first oil hydraulic pump P
1Hydraulic oil and the second oil hydraulic pump P
2Hydraulic oil under this state, can not realize the interflow, this moment two main pumps working state be: the first oil hydraulic pump P
154 walk control valve 57, rotary control valve 58, swing arm II control valve 59, dipper I control valve 60 fuel feeding, the second oil hydraulic pump P to left lateral
2Walk control valve 65, service valve 64, swing arm I control valve 63, scraper bowl control valve 62, dipper II control valve 61 fuel feeding to right lateral.
[2] x chamber 43 hydraulic oil promotion craspedodrome valve rod 24 overcomes inner spring 20, outer spring 18 active forces move right, when craspedodrome valve rod 24 is pressed on position-limited lever 19 on the blanking cover 17, craspedodrome valve rod 24 residing location definitions are valve rod second working position, P1g chamber 37 communicates with P1j chamber 38 by oil groove 26, the oil groove 25 that P1h chamber 36 links to each other with P1g chamber 37 is cut off by craspedodrome valve rod 24, P1h chamber 36 is obstructed with P1g chamber 37, P2 enters chamber 41 and communicates with P2h chamber 39 by oil groove 27, because craspedodrome valve rod 24 moves to right, making r chamber 76 and P2 enter chamber 41 communicates, the hydraulic oil of P1g37 is through z oil duct 79, t chamber 75, r chamber 76 enters P2 and advances chamber 41, the first oil hydraulic pump P
1Hydraulic oil and the second oil hydraulic pump P
2Hydraulic oil under this state, realize the interflow, this moment two main pumps working state be: the first oil hydraulic pump P
154 part hydraulic oil is given rotary control valve 58, swing arm II control valve 59, dipper I control valve 60, service valve 64, swing arm I control valve 63, scraper bowl control valve 62, dipper II control valve 61 fuel feeding, the second oil hydraulic pump P
2Hydraulic oil and the first oil hydraulic pump P
1Control valve 57 is walked to left lateral jointly in another part hydraulic oil formation interflow and right lateral is walked control valve 65 fuel feeding.
Described blanking cover 17 is spirally connected with valve body 28 right-hand members;
Described one-way valve 23 is arranged in the blind hole of craspedodrome valve rod 24 right sides, and its left side and blind hole constitute sealing pair and be used for cutting off t chamber 75 and r chamber 76, and its right-hand member withstands on the step of spring seat 80 left ends by check valve spring 22; Described one-way valve left side is the ball face sealing face, and described blind hole is the conical surface seal face.
Also comprise two-position three way pilot valve 1, pioneer pump hydraulic fluid port P in the above-mentioned valve body 28
G, throttle valve NZ
X3, throttle valve NZ
Y4, one-way valve I6, one-way valve II 7, main safety valve 8.
A kind of excavator straight line moving control system comprises the first oil hydraulic pump P
154, the second oil hydraulic pump P
255, pioneer pump 56, throttle valve NZ
X3, throttle valve NZy4, straight line moving valve 5, two-position three way pilot valve 1, one-way valve I6, one-way valve II 7, main safety valve 8, left lateral are walked control valve 57, rotary control valve 58, swing arm II control valve 59, dipper I control valve 60, right lateral and are walked control valve 65, service valve 64, swing arm I control valve 63, scraper bowl control valve 62, dipper II control valve 61 and working connection and first rodding;
When described craspedodrome valve rod 24 is in valve rod first working position, the first oil hydraulic pump P
1The 54 part hydraulic oil that flow out are flowed through oil groove 25 to P1h chamber 36 and k chamber 71 by interface among Fig. 2 11 through P1g chamber 37, flow in the P1h chamber 36 hydraulic oil again in Fig. 2 interface 16 flow to left lateral and walk control valve 57; The second oil hydraulic pump P
255 part hydraulic oil flows to P2 by the interface 14 among Fig. 2 and enters chamber 41 and m chamber 72;
When described craspedodrome valve rod 24 is in valve rod second working position, the first oil hydraulic pump P
1The 54 part hydraulic oil that flow out flow into P1g chamber 37 by interface among Fig. 2 11, enter the hydraulic oil separated into two parts oil in P1g chamber 37, a part is flowed through oil groove 26 to P1j chamber 38, interface 15 is given service valve 64 in Fig. 2 again, swing arm I control valve 63, scraper bowl control valve 62, dipper II control valve 61 fuel feeding, another part hydraulic oil flows to t chamber 75 through z oil duct 79, this moment, t chamber 75 hydraulic oil promoted the active force that one-way valve 23 spools overcome spring 22, one-way valve 23 is open, t chamber 75 communicates with r chamber 76, the hydraulic oil in the P1g chamber 37 z oil duct 79 of flowing through, t chamber 75, enter P2 behind the r chamber 76 and enter chamber 41, the first oil hydraulic pump P like this
154 part hydraulic oil and the second oil hydraulic pump P
255 hydraulic oil is realized the interflow; The second oil hydraulic pump P
255 part hydraulic oil flows into P2 by interface among Fig. 2 14 and advances chamber 41 and the first oil hydraulic pump P
1Behind 54 the part hydraulic oil interflow, to P2h chamber 39, the hydraulic oil in the P2h chamber 39 of flowing through flows to left lateral by interface among Fig. 2 13 and walks control valve 57 by oil groove 27.
The c chamber 33 of described straight line moving valve 5 communicates with the y chamber 48 of described two-position three way pilot valve 1 by L oil duct 51;
Excavator straight line moving control system also can comprise two throttle valve, and throttle valve NZX3 and throttle valve NZy4, the spool of the spool of throttle valve NZX3 and throttle valve NZy4 are all by pioneer pump filler opening 2 (P
G) be connected with guide's oil hydraulic pump 56, guide's oil hydraulic pump 56 is connected with digger revolving control valve 58, swing arm II control valve 59, dipper I control valve 60, dipper II control valve 61, scraper bowl control valve 62, swing arm I control valve 63, standby control valve 64 with throttle valve NZX3 by described first rodding, pioneer pump simultaneously by first rodding walk motor control valve 57 with throttle valve NZy4 with the excavator left lateral, right lateral is walked motor control valve 65 and is connected.
Principle of the present utility model is: when excavator needs operation limit, limit straight line moving, multi-way valve is automatically with the next main pump of general state (right side) running motor left, rotary motor, dipper oil hydraulic cylinder fuel feeding, another main pump is (left side) running motor to the right, the swing arm oil hydraulic cylinder, scraper bowl oil hydraulic cylinder fuel feeding switches to a part of hydraulic oil of a main pump to the actuating mechanism of excavating machine fuel feeding, another part oil collaborates with the hydraulic oil of another main pump, jointly left, right lateral is walked the motor fuel feeding, at this moment, two running motor loads are identical, and hydraulic system can guarantee the linear driving performance of operation limit, excavator limit walking.
Each control valve valve rod is all when meta
The guide loop:
From the hydraulic oil of pioneer pump 56 through pioneer pump hydraulic fluid port P
G2 are divided into two-way by throttle valve NZX3 and throttle valve NZy4.Referring to Fig. 4.
Right wing: the s oil duct 52 of hydraulic oil in throttle valve NZX3 enters b chamber 47 and e oil duct 34, and wherein: b chamber 47 communicates with v chamber 50 on the two-position three way pilot valve 1 by oil duct 49; The hydraulic oil that enters e oil duct 34 is by interface among Fig. 29 rotary control valve 58 among Fig. 5 of flowing through, swing arm II control valve 59, dipper I control valve 60, scraper bowl control valve 62, swing arm I control valve 63, service valve 64 is divided into two-way behind the arrival s intersection point 78, one curb u oil duct 67 flows to DrI return opening 66, and another road arrives d chamber 40.At this moment, each control valve valve rod of flowing through along e oil duct 34 because of hydraulic oil is all at meta, and oil return is unobstructed, and the hydraulic oil in e oil duct 34 and the b chamber 47 all is in low pressure.
Left side road: the q oil duct 53 of hydraulic oil in throttle valve NZy4 flows into a chamber 45 and f oil duct 44, wherein, the hydraulic oil that flows into f oil duct 35 is flowed through by interface among Fig. 2 10, and left lateral among Fig. 5 is walked valve 57, right lateral is walked valve 65, be divided into two-way after arriving s intersection point 78, one curb u oil duct 67 flows to DrI return opening 66, and another road arrives d chamber 40.Because the left lateral of flowing through is walked valve 57, right lateral is walked valve 65 all at meta, oil return is unobstructed, and a chamber 45 hydraulic oil and f oil duct 44 hydraulic oil all are in low pressure, at this moment two-position three way pilot valve attonity.
Working connection:
From the first oil hydraulic pump P
154 hydraulic oil is by working connection A81 separated into two parts oil, part oil advances along i oil duct 69 and flows into the valve rod meta that left lateral are walked control valve 57, rotary control valve 58, swing arm II control valve 59, dipper I control valve 60 these valves by interface among Fig. 2 11, flows to Dr III return opening 70 at last and takes back fuel tank; It is obstructed with P2h chamber 39 that P2 among Fig. 3 enters chamber 41, and P1g chamber 37 communicates with P1h chamber 36 by oil groove 25, the first oil hydraulic pump P
154 hydraulic oil that flow out are flowed through oil groove 25 to P1h chamber 36 and k chamber 71 by interface among Fig. 2 11 through P1g chamber 37, flow in the P1h chamber 36 hydraulic oil again in Fig. 2 interface 16 flow to left lateral and walk control valve 57; When the spool 30 of the hydraulic oil promotion one-way valve II 7 in the inflow k chamber 71 overcomes spring 29 active forces, move on one-way valve II 7 spools 30, k chamber 71 and o chamber 74 are communicated, hydraulic oil enters o chamber 74 and flows into main safety valve 8, flows back to fuel tank through main safety valve 8.From the second oil hydraulic pump P
255 hydraulic oil is by working connection B82 separated into two parts oil, and part oil is walked control valve 65, service valve 64, swing arm I control valve 63, scraper bowl control valve 62, dipper II control valve 61 along p bypass channel 73 through right lateral, flows to Dr III return opening 70 then and takes back fuel tank; Another part oil flows to P2 by the interface 14 among Fig. 2 and enters chamber 41 and m chamber 72, when the spool 32 of the promotion of the hydraulic oil in the m chamber 72 one-way valve I6 overcomes spring 31 active forces, move on the one-way valve I6 spool 32, m chamber 72 is communicated with o chamber 74, hydraulic oil enters o chamber 74 and flows to main safety valve 8, flows back to fuel tank through main safety valve 8.
During action
The guide loop:
When excavator is in job state (as excavation, dipper, revolution etc.), the throttle valve NZX3 that flows through enters the hydraulic oil of e oil duct 34 can not oil return because the control oil circuit is blocked, this moment, pressure raise, thereby b chamber 47 hydraulic fluid pressures that communicate with e oil duct 34 are raise.
When excavator is in job state, handle any one walking control valve, the throttle valve NZy4 that flows through enters the hydraulic oil of f oil duct 44 can not oil return because the control oil circuit is blocked, pressure raises, thereby a chamber 45 hydraulic fluid pressures that communicate with f oil duct 44 are raise, when a chamber 45 hydraulic oil promotion two-position three way pilot valve 1 spool 46 overcomes spring 68 active forces, the transposition that moves to left of two-position three way pilot valve 1 spool 46, at this moment, b chamber 47 communicates with y chamber 48, flow into the hydraulic oil in b chamber 47 through oil duct 49, v chamber 50, L oil duct 51 enters c oil duct 33, the high pressure oil that enters c oil duct 33 enters the x chamber 43 of straight line moving valve 5 through oil duct gap 42, x chamber 43 pressure rise, when x chamber hydraulic oil promotion straight line moving valve 5 overcomes spring 18 active forces, hydraulic oil promotes craspedodrome valve rod 24 transposition that moves to right, and the hydraulic oil in d chamber 40 is because straight line moving valve 5 transposition pressurizeds, and the oily interface 12 in Fig. 2 of part flows to DrI return opening 66 and takes back fuel tank.After 5 transpositions of straight line moving valve, r chamber 76 is entered chamber 41 with P2 and is communicated, the hydraulic oil in P1g chamber 37 flows to t chamber 75 through z oil duct 79, this moment, t chamber 75 hydraulic oil promoted the active force that one-way valve 23 spools overcome spring 22, one-way valve 23 is open, t chamber 75 communicates with r chamber 76, and the hydraulic oil in P1g chamber 37 is flowed through and entered P2 behind z oil duct 79, t chamber 75, the r chamber 76 and enter chamber 41, the first oil hydraulic pump P like this
154 part hydraulic oil and the second oil hydraulic pump P
255 hydraulic oil is realized the interflow.P1g chamber 37 and P1h chamber 36 obstructed oil, P1g chamber 37 communicates with P1j chamber 38 by oil groove 26, and P2 enters chamber 41 and communicates with P2h chamber 39 by oil groove 27, at this moment the first oil hydraulic pump P
154 hydraulic oil that flow out are divided into three parts, and a part is flowed through oil groove 26 to P1j chamber 38 by interface among Fig. 2 11 through P1g chamber 37, and interface 15 is given service valve 64, swing arm I control valve 63, scraper bowl control valve 62, dipper II control valve 61 fuel feeding in Fig. 2 again; Part oil flows into rotary control valve 58, swing arm II control valve 59, dipper I control valve 60 along i oil duct 69, w oil duct 77; Part oil and the second oil hydraulic pump P
255 hydraulic oil is realized the interflow.The first oil hydraulic pump P
154 hydraulic oil and the second oil hydraulic pump P
2Back, 55 a hydraulic oil interflow part is walked control valve 65 along p bypass channel 73 through right lateral, and another part oil enters chamber 41 by interface among Fig. 2 14 through P2 and arrives P2h chamber 39 by oil groove 27, and the hydraulic oil in the P2h chamber 39 of flowing through flows to left lateral by interface among Fig. 2 13 and walks control valve 57.This moment the first oil hydraulic pump P
1Part oil is given operation mechanism's fuel feeding, the first oil hydraulic pump P
1Another part oil and the second oil hydraulic pump P
2The common left and right sides running motor fuel feeding of giving in interflow, this has just guaranteed that excavator can realize the straight line moving function when carrying out other operations.
Claims (5)
1. a straight line moving valve is characterized in that: comprise valve body (28) and be arranged on valve body (28) interior plug screw (21), craspedodrome valve rod (24), one-way valve (23), check valve spring (22), outer spring (18), position-limited lever (19), inner spring (20), blanking cover (17), spring seat (80);
Described craspedodrome valve rod (24) left end is by plug screw (21) location, and spring seat (80) is fixed on the right-hand member of craspedodrome valve rod (24); Described plug screw (21) is spirally connected with valve body (28) left end;
Described outer spring (18) and inner spring (20) are coaxial to be enclosed within on the position-limited lever (19);
Described outer spring (18) right-hand member acts on the endoporus of blanking cover (17), and its left end acts on the step of spring seat (80) right-hand member;
Described inner spring (20) right-hand member acts on the endoporus of blanking cover (17), and its left end acts on the step of spring seat (80) right-hand member;
From left to right form x chamber (43), oil duct gap (42), c chamber (33), P1h chamber (36), oil groove (25), P1g chamber (37), oil groove (26), P1j chamber (38), P2 between described craspedodrome valve rod (24) and the valve body (28) successively and enter chamber (41), oil groove (27), P2h chamber (39); Described x chamber (43) communicates with c chamber (33) by oil duct gap (42);
The right part of described craspedodrome valve rod (24) is provided with blind hole, and described blind hole is disposed with z oil duct (79), t chamber (75), r chamber (76) from left to right; Described t chamber (75) communicates with P1g chamber (37) by z oil duct (79);
Described blanking cover (17) is spirally connected with valve body (28) right-hand member;
Described one-way valve (23) is arranged in the blind hole of craspedodrome valve rod (24) right side, its left side and blind hole constitute sealing pair and are used for cutting off t chamber (75) and r chamber (76), and its right-hand member withstands on the step of spring seat (80) left end by check valve spring (22); Described one-way valve left side is the ball face sealing face, and described blind hole is the conical surface seal face.
2. straight line moving valve according to claim 1 is characterized in that: described craspedodrome valve rod (24) is as follows with the position relation that x chamber (43), oil duct gap (42), c chamber (33), P1h chamber (36), oil groove (25), P1g chamber (37), oil groove (26), P1j chamber (38), P2 enter chamber (41), oil groove (27), P2h chamber (39), z oil duct (79), t chamber (75), r chamber (76):
1] craspedodrome valve rod (24) is given a definition at the attonity state and is valve rod first working position, described P2 advances chamber (41) and one-way valve I(6) m chamber (72) communicate, P2h chamber (39) and P2 advance the oil groove (27) that chamber (41) links to each other and are cut off by craspedodrome valve rod (24), the oil groove (26) that P1g chamber (37) links to each other with P1j chamber (38) is cut off by craspedodrome valve rod (24), P1h chamber (36) and P1g chamber (37) all communicate with the k chamber (71) of one-way valve II (7) by oil groove (25), one-way valve (23) spool moves to right, t chamber (75) communicates with r chamber (76), r chamber (76) and P2 enter chamber (41) and are cut off by craspedodrome valve rod (24), and P1g(37) to enter chamber (41) obstructed with P2;
2] x chamber (43) hydraulic oil promotion craspedodrome valve rod (24) overcomes inner spring (20), outer spring (18) active force moves right and position-limited lever (19) is pressed on blanking cover (17) when going up, the residing location definition of craspedodrome valve rod (24) is valve rod second working position, described P1g chamber (37) communicates with P1j chamber (38) by oil groove (26), the oil groove (25) that P1h chamber (36) links to each other with P1g chamber (37) is cut off by craspedodrome valve rod (24), P2 enters chamber (41) and communicates with P2h chamber (39) by oil groove (27), r chamber (76) is entered chamber (41) with P2 and is communicated, and hydraulic oil P1g(37) is through z oil duct (79), t chamber (75), r chamber (76) enters P2 and enters chamber (41).
3. straight line moving valve according to claim 1 and 2 is characterized in that: also comprise two-position three way pilot valve (1), pioneer pump hydraulic fluid port P in the described valve body (28)
G, throttle valve NZ
X(3), throttle valve NZ
Y(4), one-way valve I(6), one-way valve II (7), main safety valve (8).
4. an excavator straight line moving control system is characterized in that: comprise the first oil hydraulic pump P
1(54), the second oil hydraulic pump P
2(55), pioneer pump (56), throttle valve NZ
X(3), throttle valve NZy(4), straight line moving valve (5), two-position three way pilot valve (1), one-way valve I(6), one-way valve II (7), main safety valve (8), left lateral walk control valve (57), rotary control valve (58), swing arm II control valve (59), dipper I control valve (60), right lateral and walk control valve (65), service valve (64), swing arm I control valve (63), scraper bowl control valve (62), dipper II control valve (61) and working connection and first rodding;
Described straight line moving valve comprises valve body (28) and is arranged on valve body (28) interior plug screw (21), craspedodrome valve rod (24), one-way valve (23), check valve spring (22), outer spring (18), position-limited lever (19), inner spring (20), blanking cover (17), spring seat (80); Described craspedodrome valve rod (24) left end is by plug screw (21) location, and spring seat (80) is fixed on the right-hand member of craspedodrome valve rod (24); Described plug screw (21) is spirally connected with valve body (28) left end; Described outer spring (18) and inner spring (20) are coaxial to be enclosed within on the position-limited lever (19); Described outer spring (18) right-hand member acts on the endoporus of blanking cover (17), and its left end acts on the step of spring seat (80) right-hand member; Described inner spring (20) right-hand member acts on the endoporus of blanking cover (17), and its left end acts on the step of spring seat (80) right-hand member; From left to right form x chamber (43), oil duct gap (42), c chamber (33), P1h chamber (36), oil groove (25), P1g chamber (37), oil groove (26), P1j chamber (38), P2 between described craspedodrome valve rod (24) and the valve body (28) successively and enter chamber (41), oil groove (27), P2h chamber (39); Described x chamber (43) communicates with c chamber (33) by oil duct gap (42); The right part of described craspedodrome valve rod (24) is provided with blind hole, and described blind hole is disposed with z oil duct (79), t chamber (75), r chamber (76) from left to right; Described t chamber (75) communicates with P1g chamber (37) by z oil duct (79); Described blanking cover (17) is spirally connected with valve body (28) right-hand member; Described one-way valve (23) is arranged in the blind hole of craspedodrome valve rod (24) right side, its left side and blind hole constitute sealing pair and are used for cutting off t chamber (75) and r chamber (76), and its right-hand member withstands on the step of spring seat (80) left end by check valve spring (22); Described one-way valve left side is the ball face sealing face, and described blind hole is the conical surface seal face;
When described craspedodrome valve rod (24) is in valve rod first working position, the first oil hydraulic pump P
1(54) the part hydraulic oil of Liu Chuing is flowed through oil groove (25) to P1h chamber (36) and k chamber (71) by interface (11) through P1g chamber (37), and the hydraulic oil in the inflow P1h chamber (36) flows to left lateral through interface (16) again and walks control valve (57); The second oil hydraulic pump P
2(55) part hydraulic oil flows to P2 by interface (14) and enters chamber (41) and m chamber (72);
When described craspedodrome valve rod (24) is in valve rod second working position, the first oil hydraulic pump P
1(54) the part hydraulic oil of Liu Chuing flows into P1g chamber (37) by interface (11), enter the hydraulic oil separated into two parts oil in P1g chamber (37), a part is flowed through oil groove (26) to P1j chamber (38), give service valve (64) through interface (15) again, swing arm I control valve (63), scraper bowl control valve (62), dipper II control valve (61) fuel feeding, another part hydraulic oil flows to t chamber (75) through z oil duct (79), one-way valve (23) is open, t chamber (75) communicates with r chamber (76), the hydraulic oil of P1g chamber (37) the z oil duct (79) of flowing through, t chamber (75), enter P2 behind the r chamber (76) and enter chamber (41); The second oil hydraulic pump P
2(55) part hydraulic oil flows into P2 by interface (14) and advances chamber (41) and the first oil hydraulic pump P
1(54) behind the part hydraulic oil interflow, to P2h chamber (39), the hydraulic oil in the P2h chamber (39) of flowing through flows to left lateral by interface (13) and walks control valve (57) by oil groove (27);
(51(communicates with the y chamber (48) of described two-position three way pilot valve (1) by the L oil duct in the c chamber (33) of described straight line moving valve (5);
The described first oil hydraulic pump P
1(54) by working connection A(81) walk control valve (57), rotary control valve (58), swing arm II control valve (59), dipper I control valve (60) with described left lateral and be connected;
The described second oil hydraulic pump P
2(55) by working connection B(82) walk control valve (65), service valve (64), swing arm I control valve (63), scraper bowl control valve (62), dipper II control valve (61) with described right lateral and be connected;
Described throttle valve NZX(3) spool and throttle valve NZy(4) spool all by described pioneer pump oil-feed P
G(2) be connected with described guide's oil hydraulic pump (56), described guide's oil hydraulic pump (56) is by described first rodding and described throttle valve NZX(3) be connected with digger revolving control valve (58), swing arm II control valve (59), dipper I control valve (60), dipper II control valve (61), scraper bowl control valve (62), swing arm I control valve (63), standby control valve (64), described pioneer pump is simultaneously by first rodding and described throttle valve NZy(4) walk motor control valve (57) with the excavator left lateral, right lateral is walked motor control valve (65) and is connected.
5. excavator straight line moving control system according to claim 4 is characterized in that: described craspedodrome valve rod (24) is as follows with the position relation that x chamber (43), oil duct gap (42), c chamber (33), P1h chamber (36), oil groove (25), P1g chamber (37), oil groove (26), P1j chamber (38), P2 enter chamber (41), oil groove (27), P2h chamber (39), z oil duct (79), t chamber (75), r chamber (76):
1] craspedodrome valve rod 24 is given a definition at the attonity state and is valve rod first working position, described P2 advances chamber (41) and one-way valve I(6) m chamber (72) communicate, P2h chamber (39) and P2 advance the oil groove (27) that chamber (41) links to each other and are cut off by craspedodrome valve rod (24), the oil groove (26) that P1g chamber (37) links to each other with P1j chamber (38) is cut off by craspedodrome valve rod (24), P1h chamber (36) and P1g chamber (37) all communicate with the k chamber (71) of one-way valve II (7) by oil groove (25), one-way valve (23) spool moves to right, t chamber (75) communicates with r chamber (76), r chamber (76) and P2 enter chamber (41) and are cut off by craspedodrome valve rod (24), and P1g(37) to enter chamber (41) obstructed with P2;
2] x chamber (43) hydraulic oil promotion craspedodrome valve rod (24) overcomes inner spring (20), outer spring (18) active force moves right and position-limited lever (19) is pressed on blanking cover (17) when going up, the residing location definition of craspedodrome valve rod (24) is valve rod second working position, described P1g chamber (37) communicates with P1j chamber (38) by oil groove (26), the oil groove (25) that P1h chamber (36) links to each other with P1g chamber (37) is cut off by craspedodrome valve rod (24), P2 enters chamber (41) and communicates with P2h chamber (39) by oil groove (27), r chamber (76) is entered chamber (41) with P2 and is communicated, and hydraulic oil P1g(37) is through z oil duct (79), t chamber (75), r chamber (76) enters P2 and enters chamber (41).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320064657 CN203176035U (en) | 2013-02-04 | 2013-02-04 | Straight-line walking valve and control system achieving straight-line walking of excavator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320064657 CN203176035U (en) | 2013-02-04 | 2013-02-04 | Straight-line walking valve and control system achieving straight-line walking of excavator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203176035U true CN203176035U (en) | 2013-09-04 |
Family
ID=49072738
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320064657 Withdrawn - After Issue CN203176035U (en) | 2013-02-04 | 2013-02-04 | Straight-line walking valve and control system achieving straight-line walking of excavator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203176035U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103089738A (en) * | 2013-02-04 | 2013-05-08 | 陕西航天动力高科技股份有限公司 | Straight line walking valve and controlling system achieving excavator straight line walking |
| CN103644336A (en) * | 2013-12-28 | 2014-03-19 | 太重集团榆次液压工业有限公司 | Pilot type active belt position monitoring safety valve |
| CN107956758A (en) * | 2018-01-02 | 2018-04-24 | 山东天河科技股份有限公司 | A kind of hydraulic valve block for realizing single movement |
| CN110173015A (en) * | 2019-05-28 | 2019-08-27 | 江苏徐工工程机械研究院有限公司 | Straight travel valve, engineering machinery hydraulic control system and engineering machinery |
-
2013
- 2013-02-04 CN CN 201320064657 patent/CN203176035U/en not_active Withdrawn - After Issue
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103089738A (en) * | 2013-02-04 | 2013-05-08 | 陕西航天动力高科技股份有限公司 | Straight line walking valve and controlling system achieving excavator straight line walking |
| CN103089738B (en) * | 2013-02-04 | 2015-06-24 | 陕西航天动力高科技股份有限公司 | Straight line walking valve and controlling system achieving excavator straight line walking |
| CN103644336A (en) * | 2013-12-28 | 2014-03-19 | 太重集团榆次液压工业有限公司 | Pilot type active belt position monitoring safety valve |
| CN107956758A (en) * | 2018-01-02 | 2018-04-24 | 山东天河科技股份有限公司 | A kind of hydraulic valve block for realizing single movement |
| CN107956758B (en) * | 2018-01-02 | 2023-12-01 | 山东天河科技股份有限公司 | Hydraulic valve block capable of realizing independent action |
| CN110173015A (en) * | 2019-05-28 | 2019-08-27 | 江苏徐工工程机械研究院有限公司 | Straight travel valve, engineering machinery hydraulic control system and engineering machinery |
| CN110173015B (en) * | 2019-05-28 | 2021-07-30 | 江苏徐工工程机械研究院有限公司 | Linear traveling valve, engineering machinery hydraulic control system and engineering machinery |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130904 Effective date of abandoning: 20150624 |
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| RGAV | Abandon patent right to avoid regrant |