CN100451355C - Electrohydraulic servo oil cylinder and numerical control machine tool using same - Google Patents
Electrohydraulic servo oil cylinder and numerical control machine tool using same Download PDFInfo
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- CN100451355C CN100451355C CNB2007100626763A CN200710062676A CN100451355C CN 100451355 C CN100451355 C CN 100451355C CN B2007100626763 A CNB2007100626763 A CN B2007100626763A CN 200710062676 A CN200710062676 A CN 200710062676A CN 100451355 C CN100451355 C CN 100451355C
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Abstract
The invention relates to an electro-hydraulic servo cylinder, comprising a four-edge sliding valve whose base is mounted with a valve element moving left and right. The valve base is fixed on the cylinder whose piston rod is fixed with the frame; the cylinder is connected with the load. The left driving chamber via tube is communicated with the left working chamber, while the right driving chamber via tube is communicated with the right working chamber; one end of valve element is engaged with the dial block mounted on the straight motion output element of straight motion output device. The digit-control machine with said electro-hydraulic servo cylinder comprises a first axle servo driving system, a second axle servo driving system, a third axle servo driving system and a digit-control system, wherein, the second driving system comprises a straight load axle. The invention has high accuracy, quick steering speed, and stable property, which combines the digit control technique with the electro-hydraulic servo motion, with high accuracy in large power.
Description
Technical field
The present invention relates to a kind of electro-hydraulic servo oil cylinder and use the numerical control machine tool of this electro-hydraulic servo oil cylinder.
Background technique
Four-side is a kind of known valve that is used for controlling packet oil scraper cylinder in interior multiple hydraulic actuator commutation, speed governing, and it has simple in structure, advantages such as commutating speed fast, stable work in work.But the kinematic accuracy of the oil cylinder that existing four-side is controlled is lower, can not satisfy the needs of the equipment of various requirement high-precision motion, and does not have the function of servo servo-actuated.The linear drives of the power unit of existing multiple numerical control machine tool, generally all be to drag ball screw by actuating motor to realize, but for those heavy machine tools and most of forging machine tool, the driving power of its power unit can be up to more than the hundreds of kilowatt, if directly adopt the relevant power unit of driven by servomotor more than the hundreds of kilowatt, owing to there are multiple factors such as the rotary inertia of rotor of large-scale actuating motor is bigger, cause the kinematic accuracy of lathe to be difficult to satisfy and use needs.In addition, adopt powerful actuating motor, the cost of lathe is sharply risen.
Summary of the invention
The object of the present invention is to provide a kind of servo follow-up motion precision height, commutating speed is fast, the electro-hydraulic servo oil cylinder of stable work in work, and provide a kind of stable work in work, cost is relatively low, Numeric Control Technology is combined with the electro-hydraulic servo servo-actuated, under high-power condition, have the numerical control machine tool of this electro-hydraulic servo oil cylinder of use of high kinematic accuracy.
Electro-hydraulic servo oil cylinder of the present invention, comprise oil cylinder and four-side, the piston of oil cylinder is divided into left active chamber and right active chamber with the inner chamber of cylinder block of oil cylinder, in the valve seat of described four-side spool is installed, between the outer side wall of spool and the madial wall of valve seat from a left side and the right side is provided with left high-voltage oil cavity successively, left side actuator chamber, oil back chamber, right actuator chamber and right high-voltage oil cavity, left side high-voltage oil cavity and right high-voltage oil cavity communicate with hydraulic power respectively, the right-hand member that is positioned at spool in the valve seat is provided with Returnning spring, described oil back chamber communicates with fuel tank, described valve seat is fixed on the cylinder body of described oil cylinder, the piston rod and the frame of oil cylinder are fixedly linked, described cylinder body links to each other with load, described left actuator chamber communicates with described left active chamber, described right actuator chamber communicates with described right active chamber, when described spool is positioned at meta, described left high-voltage oil cavity disconnects with described left actuator chamber immediately, left side actuator chamber disconnects with described oil back chamber immediately, oil back chamber disconnects with described right actuator chamber immediately, right actuator chamber and described right high-voltage oil cavity disconnect, described cylinder body transfixion, when described spool when the left end of described valve seat moves, described left high-voltage oil cavity is connected with described left actuator chamber immediately, oil back chamber is connected with described right actuator chamber immediately, described cylinder body is immediately to left movement, when spool when the right-hand member of described valve seat moves, left side actuator chamber is connected with described oil back chamber immediately, and right actuator chamber is connected with described right high-voltage oil cavity immediately, and described cylinder body moves right immediately, one end of described spool matches with shifting block, and shifting block is driven by the straight line motion output unit.
Electro-hydraulic servo oil cylinder of the present invention, wherein said straight line motion output unit comprises the actuating motor that is installed on the described frame, the motor shaft of actuating motor links to each other with an end of leading screw, leading screw can be installed on the described frame rotationally, described shifting block is installed on the feed screw nut of leading screw, one end of shifting block can be slidably mounted on the guide rail, guide rail is installed on the described frame, the left end of described spool is connected with the push rod that stretches out described valve seat left end, the left end of push rod pastes mutually with the right side of described shifting block, and the right-hand member that is positioned at spool in the described valve seat is provided with Returnning spring.
Electro-hydraulic servo oil cylinder of the present invention, wherein said leading screw is no backlass ball screw, described guide rail is dovetail slideway or rectangular guideway or linear rolling track.
Electro-hydraulic servo oil cylinder of the present invention, wherein said hydraulic power comprises the volume adjustable hydraulic pump that adopts variable-frequency motor to drag, the liquid entering hole of volume adjustable hydraulic pump communicates with described fuel tank by pipeline, the liquid outlet of volume adjustable hydraulic pump communicates with described left high-voltage oil cavity and described right high-voltage oil cavity respectively by being in series with filtrating equipment and manometric pipeline, the pipeline place of volume adjustable hydraulic pump liquid outlet is parallel with relief valve, and the liquid outlet of relief valve communicates with described fuel tank by pipeline.
Electro-hydraulic servo oil cylinder of the present invention, wherein said straight line motion output unit comprises rack-mounted actuating motor, be set with gear on the motor shaft of actuating motor, wheel and rack is meshed, and tooth bar can be slidably mounted on the guide rail, and guide rail is installed on the described frame, described shifting block is installed on the guide rail, the left end of described spool is connected with the push rod that stretches out described valve seat left end, and the left end of push rod pastes mutually with the right side of described shifting block, and the right-hand member that is positioned at spool in the described valve seat is provided with Returnning spring.
Electro-hydraulic servo oil cylinder of the present invention, wherein said gear rack transmission is the transmission of no backlass gear rack, described guide rail is dovetail slideway or rectangular guideway or linear rolling track, described hydraulic power comprises the volume adjustable hydraulic pump that adopts variable-frequency motor to drag, the liquid entering hole of volume adjustable hydraulic pump communicates with described fuel tank by pipeline, the liquid outlet of volume adjustable hydraulic pump communicates with described left high-voltage oil cavity and described right high-voltage oil cavity respectively by being in series with filtrating equipment and manometric pipeline, the pipeline place of volume adjustable hydraulic pump liquid outlet is parallel with relief valve, and the liquid outlet of relief valve communicates with described fuel tank by pipeline.
Electro-hydraulic servo oil cylinder of the present invention, wherein said straight line motion output unit comprises rack-mounted linear electric motor, and described shifting block is housed on the linear electric motor.
The numerical control machine tool of use electro-hydraulic servo oil cylinder of the present invention, comprise first servo drive system, second servo drive system, the 3rd servo drive system and numerical control system, second servo drive system comprises straight line heavy duty axle, described second servo drive system comprises described electro-hydraulic servo oil cylinder, the described cylinder body of electro-hydraulic servo oil cylinder links to each other with described straight line heavy duty axle, the straight line heavy burden is carried axle and is provided with second grating pointer, second grating pointer is corresponding with second linear grating, and described actuating motor is electrically connected with described numerical control system.
Numerical control machine tool of the present invention, wherein said first servo drive system comprises rack-mounted first actuating motor, the motor shaft of first actuating motor links to each other with an end of the first axial filament thick stick, the first axial filament thick stick can be installed on the described frame rotationally, be installed with the first axial filament thick stick nut on the first axial filament thick stick, the first axial filament thick stick nut links to each other with straight line underload axle, described first actuating motor is electrically connected described volume adjustable hydraulic pump with described numerical control system, described fuel tank, described filtrating equipment, described pressure gauge, described relief valve is installed in respectively on the described frame.
Numerical control machine tool of the present invention, wherein said the 3rd servo drive system comprises rack-mounted the 3rd actuating motor, the motor shaft of the 3rd actuating motor adopts no backlass shaft coupling to link to each other with the spool II left end of four-side II, spool II actively is installed in the valve seat II of four-side II, between the madial wall of the outer side wall of spool II and valve seat II from a left side and the right side is provided with left high-voltage oil cavity II successively, left side actuator chamber II, oil back chamber II, right actuator chamber II and right high-voltage oil cavity II, left side high-voltage oil cavity II and right high-voltage oil cavity II communicate with described volume adjustable hydraulic pump respectively, described oil back chamber II communicates with described fuel tank, described valve seat II is fixed on the described frame, described left actuator chamber II communicates with the liquid entering hole of oil hydraulic motor, described right actuator chamber II communicates with the liquid outlet of oil hydraulic motor, when described spool II is positioned at meta, described left high-voltage oil cavity II and described left actuator chamber II disconnect, left side actuator chamber II and described oil back chamber II disconnect, oil back chamber II and described right actuator chamber II disconnect, right actuator chamber II and described right high-voltage oil cavity II disconnect, when described spool II when the left end of described valve seat moves, described left high-voltage oil cavity II and described left actuator chamber II connect, oil back chamber II and described right actuator chamber II connect, when spool II when the right-hand member of described valve seat moves, left side actuator chamber II and described oil back chamber II connect, right actuator chamber II and described right high-voltage oil cavity II connect, the right-hand member of described spool II links to each other with the left end of ball screw, the right-hand member of ball screw adopts screw thread to link to each other with the tail end of the rotating shaft of described oil hydraulic motor, the other end of the rotating shaft of oil hydraulic motor links to each other with the rotation bogie axle, and described the 3rd actuating motor is electrically connected with described numerical control system.
Electro-hydraulic servo oil cylinder of the present invention, its valve seat is fixed on the cylinder body of oil cylinder, the piston of oil cylinder is divided into left active chamber and right active chamber with the inner chamber of cylinder block of oil cylinder, the piston rod and the frame of oil cylinder are fixedly linked, cylinder body links to each other with load, left side actuator chamber communicates with described left active chamber by pipeline, right actuator chamber communicates with right active chamber by pipeline, one end of spool matches with shifting block, shifting block is installed on the straight line motion output member of straight line motion output unit, so electro-hydraulic servo oil cylinder of the present invention has servo follow-up motion precision height, commutating speed is fast, stable work in work characteristics.Electro-hydraulic servo oil cylinder of the present invention will be on the middle low power numerical control machine tool widespread usage, quite the numerical control system of mature and reliable and actuating motor combine with fluid pressure drive device as power amplifier technically, obtain a kind of high speed, highi degree of accuracy, powerful electro-hydraulic servo drive device, its power can reach several megawatts, thereby can drive various super large loads, and then make various jumboes be able to numerical controlization.These jumboes comprise that large-sized gantry mills, heavy boring drilling and milling machine, large size plastic jetting-moulding device, heavy duty oil press, multiple rolling mill, the water valve of large hydropower station, multiple heavy weapon, warship, radar, cannon etc.The numerical control machine tool of use electro-hydraulic servo oil cylinder of the present invention, its second servo drive system comprises rack-mounted actuating motor, the motor shaft of actuating motor links to each other with an end of no backlass ball screw, no backlass ball screw can be installed on the frame rotationally, guide rail is installed on the frame, the piston rod of oil cylinder and described frame are fixedly linked, cylinder body links to each other with described straight line heavy duty axle, the straight line heavy burden is carried axle and is provided with second grating pointer, second grating pointer is corresponding with second linear grating, and described actuating motor is electrically connected with described numerical control system.So it is relatively low that the numerical control machine tool of use electro-hydraulic servo oil cylinder of the present invention has cost, under high-power condition, have the characteristics of high kinematic accuracy.The numerical control machine tool of use electro-hydraulic servo oil cylinder of the present invention is improved to electro-hydraulic servo with pure electric middle low power servo-drive and drives, and overweight load is driven realized numerical controlization.
Electro-hydraulic servo oil cylinder of the present invention and use other details of numerical control machine tool of this electro-hydraulic servo oil cylinder and characteristics can just can be cheer and bright by reading the embodiment who hereinafter encyclopaedizes in conjunction with the accompanying drawings.
Description of drawings
Fig. 1 is the plan view of the structural representation of electro-hydraulic servo oil cylinder of the present invention;
Fig. 2 is the structural representation of the numerical control machine tool of use electro-hydraulic servo oil cylinder of the present invention;
Fig. 3 is the plan view of the structural representation of the four-side II of the numerical control machine tool of use electro-hydraulic servo oil cylinder of the present invention.
Embodiment
As shown in Figure 1, electro-hydraulic servo oil cylinder of the present invention, comprise oil cylinder 11 and four-side 1, the piston 13 of oil cylinder 11 is divided into left active chamber 14 and right active chamber 15 with cylinder body 12 inner chambers of oil cylinder 11, about in the valve seat 2 of four-side 1 spool 3 is installed actively, between the madial wall of the outer side wall of spool 3 and valve seat 2 from a left side and the right side is provided with left high-voltage oil cavity 4 successively, left side actuator chamber 5, oil back chamber 6, right actuator chamber 7 and right high-voltage oil cavity 8, left side high-voltage oil cavity 4 and right high-voltage oil cavity 8 communicate with hydraulic power by pipeline respectively, oil back chamber 6 communicates with fuel tank 10 by pipeline, valve seat 2 is fixed on the cylinder body 12 of oil cylinder 11, the piston rod 16 and the frame 17 of oil cylinder 11 are fixedly linked, cylinder body 12 links to each other with load 18, left side actuator chamber 5 communicates with left active chamber 14 by pipeline, right actuator chamber 7 communicates with right active chamber 15 by pipeline, when spool 3 is positioned at meta, left side high-voltage oil cavity 4 disconnects with left actuator chamber 5 immediately, left side actuator chamber 5 disconnects with oil back chamber 6 immediately, oil back chamber 6 disconnects with right actuator chamber 7 immediately, right actuator chamber 7 disconnects with right high-voltage oil cavity 8 immediately, cylinder body 12 transfixions, when spool 3 when the left end of valve seat 2 moves, left side high-voltage oil cavity 4 is connected with left actuator chamber 5 immediately, left side actuator chamber 5 keeps disconnecting with oil back chamber 6, oil back chamber 6 is connected with right actuator chamber 7 immediately, right actuator chamber 7 keeps disconnecting with right high-voltage oil cavity 8, cylinder body 12 is immediately to left movement, when spool 3 when the right-hand member of valve seat 2 moves, left side high-voltage oil cavity 4 keeps disconnecting with left actuator chamber 5, left side actuator chamber 5 is connected with oil back chamber 6 immediately, oil back chamber 6 keeps disconnecting with right actuator chamber 7, right actuator chamber 7 is connected with right high-voltage oil cavity 8 immediately, cylinder body 12 moves right immediately, one end of spool 3 matches with shifting block 9, and shifting block 9 is installed on the straight line motion output member of straight line motion output unit.
The straight line motion output unit of electro-hydraulic servo oil cylinder of the present invention comprises the actuating motor 19 that is installed on the frame 17, the motor shaft of actuating motor 19 links to each other with an end of leading screw 20, leading screw 20 can be installed on the frame 17 rotationally, shifting block 9 is installed on the feed screw nut of leading screw 20, one end of shifting block 9 can be slidably mounted on the guide rail 22, guide rail 22 is installed on the frame 17, the left end of spool 3 is connected with the push rod 21 that stretches out valve seat 2 left ends, the left end of push rod 21 pastes mutually with the right side of shifting block 9, and the right-hand member that is positioned at spool 3 in the valve seat 2 is provided with Returnning spring 23.When leading screw 20 rotates under the dragging of actuating motor 19, the feed screw nut moving linearly that shifting block 9 is installed will be driven, and push rod 21 can be headed on, make spool 3 with shifting block 9 motions.
Above-mentioned leading screw 20 is no backlass ball screw, and guide rail 22 is dovetail slideway or rectangular guideway or linear rolling track.
Hydraulic power comprises the volume adjustable hydraulic pump 50 that adopts variable-frequency motor to drag, the liquid entering hole of volume adjustable hydraulic pump 50 communicates with fuel tank 10 by pipeline, the liquid outlet of volume adjustable hydraulic pump 50 communicates with left high-voltage oil cavity 4 and right high-voltage oil cavity 8 respectively by the pipeline that is in series with filtrating equipment 24 and pressure gauge 25, the pipeline place of volume adjustable hydraulic pump 50 liquid outlets is parallel with relief valve 51, and the liquid outlet of relief valve 51 communicates with fuel tank 10 by pipeline.
The straight line motion output unit of electro-hydraulic servo oil cylinder of the present invention also can be to comprise the actuating motor 19 that is installed on the frame 17, be set with gear (not drawing among the figure) on the motor shaft of actuating motor 19, wheel and rack (not drawing among the figure) is meshed, tooth bar can be slidably mounted on the guide rail 22, guide rail 22 is installed on the frame 17, shifting block 9 is installed on the guide rail 22, the left end of spool 3 is connected with the push rod 21 that stretches out valve seat 2 left ends, the left end of push rod 21 pastes mutually with the right side of shifting block 9, and the right-hand member that is positioned at spool 3 in the valve seat 2 is provided with Returnning spring 23.
The transmission of said gear tooth bar is the transmission of no backlass gear rack, and guide rail 22 is dovetail slideway or rectangular guideway or linear rolling track.
The straight line motion output unit of electro-hydraulic servo oil cylinder of the present invention also can be to comprise the linear electric motor (not drawing among the figure) that are installed on the frame 17, and shifting block 9 is housed on linear electric motor.
Electro-hydraulic servo oil cylinder hydraulic of the present invention source comprises the volume adjustable hydraulic pump 50 that adopts variable-frequency motor to drag, the liquid entering hole of volume adjustable hydraulic pump 50 communicates with described fuel tank 10 by pipeline, the liquid outlet of volume adjustable hydraulic pump 50 communicates with left high-voltage oil cavity 4 and described right high-voltage oil cavity 8 respectively by the pipeline that is in series with filtrating equipment 24 and pressure gauge 25, the pipeline place of volume adjustable hydraulic pump 50 liquid outlets is parallel with relief valve 51, and the liquid outlet of relief valve 51 communicates with fuel tank 10 by pipeline.
Electro-hydraulic servo oil cylinder of the present invention in use, when shifting block 9 leaves push rod 21 to left movement, spool 3 spring 23 that is reset heads on when left movement, left side high-voltage oil cavity 4 is connected with left actuator chamber 5 immediately, left side actuator chamber 5 keeps disconnecting with oil back chamber 6, oil back chamber 6 is connected with right actuator chamber 7 immediately, right actuator chamber 7 keeps disconnecting with right high-voltage oil cavity 8, thereby make high pressure oil enter the left active chamber 14 of oil cylinder 11 from left high-voltage oil cavity 4 through left actuator chamber 5, the hydraulic oil in the right active chamber 15 of oil cylinder 11 is got back to fuel tank 10 from right actuator chamber 7 through oil back chamber 6 simultaneously.So the cylinder body 12 of oil cylinder 11 immediately can be to left movement.When shifting block 9 moves right, by push rod 21 overhead-valve cores 3, compression reseting spring 23 and when making spool 3 move right, left side high-voltage oil cavity 4 keeps disconnecting with left actuator chamber 5, left side actuator chamber 5 is connected with oil back chamber 6 immediately, oil back chamber 6 keeps disconnecting with right actuator chamber 7, right actuator chamber 7 is connected with right high-voltage oil cavity 8 immediately, thereby make high pressure oil enter the right active chamber 15 of oil cylinder 11 from right high-voltage oil cavity 8 through right actuator chamber 7, the hydraulic oil in the left active chamber 14 of oil cylinder 11 is got back to fuel tank 10 from left actuator chamber 5 through oil back chamber 6 simultaneously.So the cylinder body 12 of oil cylinder 11 can move right immediately.When shifting block 9 transfixions, the cylinder body 12 of oil cylinder 11 can stop motion immediately.Thereby can realize servo servo-actuated.
As shown in Figures 2 and 3, use the numerical control machine tool of electro-hydraulic servo oil cylinder, comprise first servo drive system, second servo drive system, the 3rd servo drive system and numerical control system, second servo drive system comprises straight line heavy duty axle 27, second servo drive system comprises the actuating motor 19 that is installed on the frame 26, the motor shaft of actuating motor 19 links to each other with an end of no backlass ball screw 20, no backlass ball screw 20 can be installed on the frame 26 rotationally, guide rail 22 is installed on the frame 26, the piston rod 16 and the frame 26 of oil cylinder 11 are fixedly linked, cylinder body 12 links to each other with straight line heavy duty axle 27, the straight line heavy burden is carried axle 27 and is provided with second grating pointer 28, second grating pointer 28 is corresponding with second linear grating 29, and actuating motor 19 is electrically connected with numerical control system.
Second servo drive system in use, when needs straight line heavy duty axle 27 during to left movement, can start actuating motor 19 makes shifting block 9 leave push rod 21 to left movement, spool 3 spring 23 that will be reset heads on to left movement, left side high-voltage oil cavity 4 is connected with left actuator chamber 5 immediately, left side actuator chamber 5 keeps disconnecting with oil back chamber 6, oil back chamber 6 is connected with right actuator chamber 7 immediately, right actuator chamber 7 keeps disconnecting with right high-voltage oil cavity 8, thereby make high pressure oil enter the left active chamber 14 of oil cylinder 11 from left high-voltage oil cavity 4 through left actuator chamber 5, the hydraulic oil in the right active chamber 15 of oil cylinder 11 is got back to fuel tank 10 from right actuator chamber 7 through oil back chamber 6 simultaneously.So the cylinder body 12 of oil cylinder 11 immediately can be to left movement, thereby drive straight line heavy duty axle 27 to left movement.When needs straight line heavy duty axle 27 moves right, can start actuating motor 19 makes shifting block 9 move right, by push rod 21 overhead-valve cores 3, compression reseting spring 23 also makes spool 3 move right, left side high-voltage oil cavity 4 keeps disconnecting with left actuator chamber 5, left side actuator chamber 5 is connected with oil back chamber 6 immediately, oil back chamber 6 keeps disconnecting with right actuator chamber 7, right actuator chamber 7 is connected with right high-voltage oil cavity 8 immediately, thereby make high pressure oil enter the right active chamber 15 of oil cylinder 11 from right high-voltage oil cavity 8 through right actuator chamber 7, the hydraulic oil in the left active chamber 14 of oil cylinder 11 is got back to fuel tank 10 from left actuator chamber 5 through oil back chamber 6 simultaneously.So the cylinder body 12 of oil cylinder 11 can move right immediately, move right thereby drive straight line heavy duty axle 27.When shifting block 9 transfixions, the cylinder body of oil cylinder 11 12 can stop motions immediately, and straight line heavy duty axle 27 is transfixion immediately also.
First servo drive system comprises first actuating motor 30 that is installed on the frame 26, the motor shaft of first actuating motor 30 links to each other with an end of the first axial filament thick stick 31, the first axial filament thick stick 31 can be installed on the frame 26 rotationally, be installed with the first axial filament thick stick nut 32 on the first axial filament thick stick 31, the first axial filament thick stick nut 32 links to each other with straight line underload axle 18, first actuating motor 30 is electrically connected with numerical control system, and volume adjustable hydraulic pump 50, fuel tank 10, filtrating equipment 24, pressure gauge 25, relief valve 51 are installed in respectively on the frame 26.
The 3rd servo drive system comprises the 3rd actuating motor 33 that is installed on the frame 26, the motor shaft of the 3rd actuating motor 33 adopts no backlass shaft coupling 36 to link to each other with the spool II35 left end of four-side II34, spool II35 actively is installed in the valve seat II40 of four-side II34, between the madial wall of the outer side wall of spool II35 and valve seat II40 from a left side and the right side is provided with left high-voltage oil cavity II41 successively, left side actuator chamber II42, oil back chamber II43, right actuator chamber II44 and right high-voltage oil cavity II45, left side high-voltage oil cavity II41 and right high-voltage oil cavity II45 communicate with volume adjustable hydraulic pump 50 by pipeline respectively, oil back chamber II43 communicates with fuel tank 10 by pipeline, valve seat II40 is fixed on the frame 26, left side actuator chamber II42 communicates by the liquid entering hole of pipeline with oil hydraulic motor 38, right actuator chamber II44 communicates by the liquid outlet of pipeline with oil hydraulic motor 38, when spool II35 is positioned at meta, described left high-voltage oil cavity II41 disconnects with described left actuator chamber II42 immediately, left side actuator chamber II42 disconnects with oil back chamber II43 immediately, oil back chamber II43 disconnects with right actuator chamber II44 immediately, right actuator chamber II44 disconnects with right high-voltage oil cavity II45 immediately, when spool II35 when the left end of valve seat 2 moves, left side high-voltage oil cavity II41 connects with left actuator chamber II42 immediately, left side actuator chamber II42 and oil back chamber II43 keep disconnecting, oil back chamber II43 connects with right actuator chamber II44 immediately, right actuator chamber II44 and right high-voltage oil cavity II45 keep disconnecting, when spool II35 when the right-hand member of valve seat 2 moves, left side high-voltage oil cavity II41 and left actuator chamber II42 keep disconnecting, left side actuator chamber II42 connects with oil back chamber II43 immediately, oil back chamber II43 and right actuator chamber II44 keep disconnecting, right actuator chamber II44 connects with right high-voltage oil cavity II45 immediately, the right-hand member of spool II35 links to each other with the left end of ball screw 37, the right-hand member of ball screw 37 adopts screw thread to link to each other with the tail end of the rotating shaft of oil hydraulic motor 38, the other end of the rotating shaft of oil hydraulic motor 38 links to each other with rotation bogie axle 39, and the 3rd actuating motor 33 is electrically connected with numerical control system.
The 3rd servo drive system in use, when needs rotation bogie axle 39 is made clockwise rotation, can start the 3rd actuating motor 33 makes the spool II35 of four-side II34 make clockwise rotation, spool II35 will drag motion ball screw 37 and make clockwise rotation, because the right-hand member of ball screw 37 adopts screw thread to link to each other with the tail end of the rotating shaft of oil hydraulic motor 38, and the rotating shaft of oil hydraulic motor 38 is not done rotation synchronously with ball screw 37 at this moment, make that ball screw 37 can be to left movement, thereby make spool II35 to left movement, so, left side high-voltage oil cavity II41 connects with left actuator chamber II42 immediately, left side actuator chamber II42 and oil back chamber II43 keep disconnecting, oil back chamber II43 connects with right actuator chamber II44 immediately, right actuator chamber II44 and right high-voltage oil cavity II45 keep disconnecting, thereby make high pressure oil enter the left active chamber 14 of oil cylinder 11 from left high-voltage oil cavity II41 through left actuator chamber II42, the hydraulic oil in the right active chamber 15 of oil cylinder 11 is got back to fuel tank 10 from right actuator chamber II44 through oil back chamber II43 simultaneously.So, clockwise rotation is made in the rotating shaft meeting of oil hydraulic motor 38 immediately, thereby driven rotary bogie axle 39 is made clockwise rotation with the motor shaft of the 3rd actuating motor 33, and after the rotating shaft of oil hydraulic motor 38 was done rotation synchronously with ball screw 37 at this moment, ball screw 37 stopped to left movement.
When needs rotation bogie axle 39 slows down or stops to make clockwise rotation, can make the spool II35 of four-side II34 slow down or stop the rotation motion by the 3rd actuating motor 33, spool II35 will make motion ball screw 37 slow down or stop to do clockwise rotation, because the right-hand member of ball screw 37 adopts screw thread to link to each other with the tail end of the rotating shaft of oil hydraulic motor 38, by and the rotating shaft of oil hydraulic motor 38 at this moment not and ball screw 37 do rotation synchronously, make ball screw 37 to move right, thereby make spool II35 move right, so, left side high-voltage oil cavity II41 and left actuator chamber 5 keep disconnecting, left side actuator chamber II42 connects with oil back chamber II43 immediately, oil back chamber II43 and right actuator chamber II44 keep disconnecting, right actuator chamber II44 connects with right high-voltage oil cavity II45 immediately, thereby make high pressure oil enter the right active chamber 15 of oil cylinder 11 from right high-voltage oil cavity II45 through right actuator chamber II44, the hydraulic oil in the left active chamber 14 of oil cylinder 11 is got back to fuel tank 10 from left actuator chamber 5 through oil back chamber II43 simultaneously.So the rotating shaft meeting of oil hydraulic motor 38 is slowed down with the motor shaft of the 3rd actuating motor 33 immediately or stopped to do clockwise rotation, thereby driven rotary bogie axle 39 is done to slow down or stop to do clockwise rotation.When the 3rd actuating motor 33 transfixions, the rotating shaft meeting of oil hydraulic motor 38 stops operating immediately, and rotation bogie axle 39 also can be along with stopping operating immediately.
Embodiment recited above is described preferred implementation of the present invention; be not that design of the present invention and scope are limited; do not breaking away under the design concept prerequisite of the present invention; common engineers and technicians make technological scheme of the present invention in related domain various modification and improvement; all should fall into protection scope of the present invention; the technology contents that the present invention asks for protection all is documented in claims.
Claims (10)
1. electro-hydraulic servo oil cylinder, comprise oil cylinder (11) and four-side (1), the piston (13) of oil cylinder (11) is divided into left active chamber (14) and right active chamber (15) with cylinder body (12) inner chamber of oil cylinder (11), in the valve seat (2) of described four-side (1) spool (3) is installed, between the madial wall of the outer side wall of spool (3) and valve seat (2) from a left side and the right side is provided with left high-voltage oil cavity (4) successively, left side actuator chamber (5), oil back chamber (6), right actuator chamber (7) and right high-voltage oil cavity (8), left side high-voltage oil cavity (4) and right high-voltage oil cavity (8) communicate with hydraulic power respectively, the right-hand member that is positioned at spool (3) in the valve seat (2) is provided with Returnning spring (23), described oil back chamber (6) communicates with fuel tank (10), it is characterized in that described valve seat (2) is fixed on the cylinder body (12) of described oil cylinder (11), the piston rod (16) of oil cylinder (11) is fixedly linked with frame (17), described cylinder body (12) links to each other with load (18), described left actuator chamber (5) communicates with described left active chamber (14), described right actuator chamber (7) communicates with described right active chamber (15), when described spool (3) when being positioned at meta, described left high-voltage oil cavity (4) disconnects with described left actuator chamber (5) immediately, left side actuator chamber (5) disconnects with described oil back chamber (6) immediately, oil back chamber (6) disconnects with described right actuator chamber (7) immediately, right actuator chamber (7) disconnects with described right high-voltage oil cavity (8) immediately, described cylinder body (12) transfixion, when described spool (3) when the left end of described valve seat (2) moves, described left high-voltage oil cavity (4) is connected with described left actuator chamber (5) immediately, oil back chamber (6) is connected with described right actuator chamber (7) immediately, described cylinder body (12) is immediately to left movement, when spool (3) when the right-hand member of described valve seat (2) moves, left side actuator chamber (5) is connected with described oil back chamber (6) immediately, right actuator chamber (7) is connected with described right high-voltage oil cavity (8) immediately, described cylinder body (12) moves right immediately, one end of described spool (3) matches with shifting block (9), and shifting block (9) is driven by the straight line motion output unit.
2. electro-hydraulic servo oil cylinder according to claim 1, it is characterized in that described straight line motion output unit comprises the actuating motor (19) that is installed on the described frame (17), the motor shaft of actuating motor (19) links to each other with an end of leading screw (20), leading screw (20) can be installed on the described frame (17) rotationally, described shifting block (9) is installed on the feed screw nut of leading screw (20), one end of shifting block (9) can be slidably mounted on the guide rail (22), guide rail (22) is installed on the described frame (17), the left end of described spool (3) is connected with the push rod (21) that stretches out described valve seat (2) left end, and the left end of push rod (21) pastes mutually with the right side of described shifting block (9).
3. electro-hydraulic servo oil cylinder according to claim 2 is characterized in that described leading screw (20) is no backlass ball screw, and described guide rail (22) is dovetail slideway or rectangular guideway or linear rolling track.
4. electro-hydraulic servo oil cylinder according to claim 3, it is characterized in that described hydraulic power comprises the volume adjustable hydraulic pump (50) that adopts variable-frequency motor to drag, the liquid entering hole of volume adjustable hydraulic pump (50) communicates with described fuel tank (10) by pipeline, the liquid outlet of volume adjustable hydraulic pump (50) communicates with described left high-voltage oil cavity (4) and described right high-voltage oil cavity (8) respectively by the pipeline that is in series with filtrating equipment (24) and pressure gauge (25), the pipeline place of volume adjustable hydraulic pump (50) liquid outlet is parallel with relief valve (51), and the liquid outlet of relief valve (51) communicates with described fuel tank (10) by pipeline.
5. electro-hydraulic servo oil cylinder according to claim 1, it is characterized in that described straight line motion output unit comprises the actuating motor (19) that is installed on the frame (17), be set with gear on the motor shaft of actuating motor (19), wheel and rack is meshed, tooth bar can be slidably mounted on the guide rail (22), guide rail (22) is installed on the described frame (17), described shifting block (9) is installed on the guide rail (22), the left end of described spool (3) is connected with the push rod (21) that stretches out described valve seat (2) left end, the left end of push rod (21) pastes mutually with the right side of described shifting block (9), and the right-hand member that is positioned at spool (3) in the described valve seat (2) is provided with Returnning spring (23).
6. electro-hydraulic servo oil cylinder according to claim 5, it is characterized in that described gear rack transmission is the transmission of no backlass gear rack, described guide rail (22) is dovetail slideway or rectangular guideway or linear rolling track, described hydraulic power comprises the volume adjustable hydraulic pump (50) that adopts variable-frequency motor to drag, the liquid entering hole of volume adjustable hydraulic pump (50) communicates with described fuel tank (10) by pipeline, the liquid outlet of volume adjustable hydraulic pump (50) communicates with described left high-voltage oil cavity (4) and described right high-voltage oil cavity (8) respectively by the pipeline that is in series with filtrating equipment (24) and pressure gauge (25), the pipeline place of volume adjustable hydraulic pump (50) liquid outlet is parallel with relief valve (51), and the liquid outlet of relief valve (51) communicates with described fuel tank (10) by pipeline.
7. electro-hydraulic servo oil cylinder according to claim 1 is characterized in that described straight line motion output unit comprises the linear electric motor that are installed on the frame (17), is equipped with described shifting block (9) on the linear electric motor.
8. use the numerical control machine tool of the described electro-hydraulic servo oil cylinder of claim 4, comprise first servo drive system, second servo drive system, the 3rd servo drive system and numerical control system, second servo drive system comprises straight line heavy duty axle (27), it is characterized in that described second servo drive system comprises described electro-hydraulic servo oil cylinder, the described cylinder body (12) of electro-hydraulic servo oil cylinder links to each other with described straight line heavy duty axle (27), the straight line heavy burden is carried axle (27) and is provided with second grating pointer (28), second grating pointer (28) is corresponding with second linear grating (29), and described actuating motor (19) is electrically connected with described numerical control system.
9. numerical control machine tool according to claim 8, it is characterized in that described first servo drive system comprises first actuating motor (30) that is installed on the frame (26), the motor shaft of first actuating motor (30) links to each other with an end of the first axial filament thick stick (31), the first axial filament thick stick (31) can be installed on the frame rotationally, be installed with the first axial filament thick stick nut (32) on the first axial filament thick stick (31), the first axial filament thick stick nut (32) links to each other with straight line underload axle (18), described first actuating motor (30) is electrically connected with described numerical control system, described volume adjustable hydraulic pump (50), described fuel tank (10), described filtrating equipment (24), pressure gauge (25), relief valve (51) is installed in respectively on the described frame.
10. numerical control machine tool according to claim 9, it is characterized in that described the 3rd servo drive system comprises the 3rd actuating motor (33) that is installed on the frame (26), the motor shaft of the 3rd actuating motor (33) adopts no backlass shaft coupling (36) to link to each other with spool II (35) left end of four-side II (34), spool II (35) actively is installed in the valve seat II (40) of four-side II (34), between the madial wall of the outer side wall of spool II (35) and valve seat II (40) from a left side and the right side is provided with left high-voltage oil cavity II (41) successively, left side actuator chamber II (42), oil back chamber II (43), right actuator chamber II (44) and right high-voltage oil cavity II (45), left side high-voltage oil cavity II (41) and right high-voltage oil cavity II (45) communicate with described volume adjustable hydraulic pump (50) respectively, described oil back chamber II (43) communicates with described fuel tank (10), described valve seat II (40) is fixed on the described frame, described left actuator chamber II (42) communicates with the liquid entering hole of oil hydraulic motor (38), described right actuator chamber II (44) communicates with the liquid outlet of oil hydraulic motor (38), as described spool II (35) when being positioned at meta, described left high-voltage oil cavity II (41) and described left actuator chamber II (42) disconnect, left side actuator chamber II (42) and described oil back chamber II (43) disconnect, oil back chamber II (43) and described right actuator chamber II (44) disconnect, right actuator chamber II (44) and described right high-voltage oil cavity II (45) disconnect, when described spool II (35) when the left end of described valve seat (2) moves, described left high-voltage oil cavity II (41) and described left actuator chamber II (42) connect, oil back chamber II (43) and described right actuator chamber II (44) connect, when spool II (35) when the right-hand member of described valve seat (2) moves, left side actuator chamber II (42) and described oil back chamber II (43) connect, right actuator chamber II (44) and described right high-voltage oil cavity II (45) connect, the right-hand member of described spool II (35) links to each other with the left end of ball screw (37), the right-hand member of ball screw (37) adopts screw thread to link to each other with the tail end of the rotating shaft of described oil hydraulic motor (38), the other end of the rotating shaft of oil hydraulic motor (38) links to each other with rotation bogie axle (39), and described the 3rd actuating motor (33) is electrically connected with described numerical control system.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2007100626763A CN100451355C (en) | 2007-01-12 | 2007-01-12 | Electrohydraulic servo oil cylinder and numerical control machine tool using same |
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| CNB2007100626763A CN100451355C (en) | 2007-01-12 | 2007-01-12 | Electrohydraulic servo oil cylinder and numerical control machine tool using same |
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| CN101008413A CN101008413A (en) | 2007-08-01 |
| CN100451355C true CN100451355C (en) | 2009-01-14 |
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| CN108105195A (en) * | 2018-02-06 | 2018-06-01 | 北京亿美博科技有限公司 | A kind of mechanical electronic hydraulic digital servo valve |
| CN110529447B (en) * | 2019-09-06 | 2021-05-11 | 烟台中宇航空液压有限公司 | Oil filter of electrohydraulic servo valve |
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| CN101008413A (en) | 2007-08-01 |
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