CN103148046B - A kind of direct-drive supercharged formula of AC servo three layers of piston electrohydraulic cylinder and boosting method - Google Patents
A kind of direct-drive supercharged formula of AC servo three layers of piston electrohydraulic cylinder and boosting method Download PDFInfo
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Abstract
A kind of direct-drive supercharged formula of AC servo three layers of piston electrohydraulic cylinder and boosting method, this oil hydraulic cylinder eliminates pumping plant, fuel tank, numerous and diverse hydraulic pipe line and hydrovalve in conventional cylinder, simple and compact for structure, failure rate is low, at piston rod output terminal installation position displacement sensor, and in high-voltage oil cavity setting pressure sensor, can conveniently by the closed loop control control of AC servo motor being realized to displacement, ouput force; Alternating current servo motor direct drives leading screw and drives piston linear motion, three layers of piston are adopted to obtain pressurized effect, hydraulic oil circulates in hydraulic cylinder inside, can react rapidly topping up and discharge opeing, and can convert its mode of structure according to different usage requirements when hydraulic cylinder works.
Description
Technical field
The invention belongs to oil hydraulic cylinder manufacturing technology field, be specifically related to the direct-drive supercharged formula of a kind of AC servo three layers of piston electrohydraulic cylinder and boosting method.
Background technique
Traditional oil hydraulic cylinder needs hydraulic power unit, fuel tank, several hydrovalves, hydraulic pipe line and automatical control system etc., complex structure, and floor space is large, and rate of fault is high; Electric cylinder be by electronic and with the modular product of leading screw integrated design, structure is simple, and ouput force is little, does not also possess function of increasing pressure, realize the closed loop control of regulation ouput force, often needs to add loading formula pressure transducer.
Summary of the invention
In order to overcome the shortcoming of above-mentioned prior art, the invention provides the direct-drive supercharged formula of a kind of AC servo three layers of piston electrohydraulic cylinder and boosting method thereof, structure is simple, failure rate is low, if at piston rod output terminal installation position displacement sensor, and in high-voltage oil cavity setting pressure sensor, can conveniently by the closed loop control control of AC servo motor being realized to displacement, ouput force; Alternating current servo motor direct drives leading screw and drives piston linear motion, and adopt three layers of piston to obtain pressurized effect, hydraulic oil circulates in hydraulic cylinder inside, eliminates fuel tank, and active chamber can topping up and discharge opeing rapidly.
In order to achieve the above object, the technical solution used in the present invention is:
A kind of direct-drive supercharged formula of AC servo three layers of piston electrohydraulic cylinder, comprise the motor reducer 2 that alternating current servomotor 1 and machine shaft connect, the output shaft of motor reducer 2 connects a small pulley 3, small pulley 3 connects a large belt wheel 5 by toothed belt 4, large belt wheel 5 is coupled as one with ball screw 7 by two large round nuts 6, large belt wheel 5 drives ball screw 7 to rotate together, ball-screw nut 10 ball screw 7 is equipped with, ball-screw nut 10 and first layer piston 11 radial fit are coupled as one, the upper cover of piston rod of first layer piston 11 spring 12, the top and bottom of spring 12 contact with first layer piston 11 and second time piston 13 respectively, the piston rod radial fit of second layer piston 13 and first layer piston 11, cavity between first layer piston 11 with second layer piston 13 communicates with air, space between the upper-end surface of first layer piston 11 and cylinder body 18 is A chamber 9, B chamber 16 is formed between the piston rod of first layer piston 11 and ball screw 7, cylinder body 18 below second layer piston 13 is processed with small piston chamber 19, the cylinder body at place, small piston chamber 19, the piston rod of first layer piston 11, C chamber 17 is formed between second layer piston 13, third layer piston 21 is had below small piston chamber 19, the piston rod of third layer piston 21 can through the cylinder bottom 30 with cylinder body 18 fixed connection, externally exert a force when hydraulic cylinder works, the area of third layer piston 21 is greater than the rod areas of first layer piston 11, be D chamber 20 between third layer piston 21 and place, small piston chamber 19 cylinder body, small piston chamber 19 has been communicated with C chamber 17 and D chamber 20, space between third layer piston 21 and cylinder bottom 30 is E chamber 22, A chamber 9 during hydraulic cylinder works, B chamber 16, C chamber 17, D chamber 20, all hydraulic oil is filled with in E chamber 22 and small piston chamber 19,
Hydraulic pipe line 23 is connected with between E chamber 22 and A chamber 9, in hydraulic cylinder piston fast downlink and pressurization stages at a slow speed, hydraulic oil in E chamber 22 is discharged to A chamber 9 and B chamber 16 by hydraulic pipe line 23, in the hydraulic cylinder piston backhaul stage, the hydraulic oil in A chamber 9 and B chamber 16 flows into 22 li, E chamber by hydraulic pipe line 23;
Back pressure valve 14 and one-way valve 15 are housed above cylinder body 18, the two ends of back pressure valve 14 connect A chamber 9 and C chamber 17 respectively, in the hydraulic cylinder piston fast downlink stage, when oil pressure in A chamber 9 is not enough, back pressure valve 14 is opened, the hydraulic oil in C chamber 17 in the elastic force effect of spring 12 to A chamber 9 replenisher force feed; In oil hydraulic cylinder pressurization stages at a slow speed, the piston rod of first layer piston 11 blocks up small piston chamber 19, and when first layer piston 11 is descending, back pressure valve 14 is opened, and the hydraulic oil in C chamber 17 flows into A chamber 9 and B chamber 16 by back pressure valve 14; The two ends of one-way valve 15 connect A chamber 9 and C chamber 17 respectively, and in the hydraulic cylinder piston backhaul stage, one-way valve 15 is opened, C chamber 17 oil suction from A chamber 9.
The basis of said structure is removed small pulley 3, toothed belt 4, large belt wheel 5, the output shaft of motor reducer 2 is connect by coupling 27 and ball screw 7, and during work, AC servo motor 1 is rotated by motor reducer 2, coupling 27 Direct driver ball screw 7.
In order to improve the bearing capacity of oil hydraulic cylinder, ball screw 7 and ball-screw nut 9 are replaced with planetary roller screw 24, planetary roller screw nut 25 respectively, planetary roller screw nut 25 is by roller 26 and planetary roller screw 24 radial fit.
At the output terminal installation position displacement sensor of the piston rod of third layer piston 21, and in high-voltage oil cavity D chamber 20 setting pressure sensor, can conveniently by the closed loop control control of AC servo motor 1 being realized to displacement, ouput force.
The boosting method of the direct-drive supercharged formula of a kind of AC servo three layers of piston electrohydraulic cylinder, the hydraulic cylinder piston fast downlink stage, alternating current servomotor 1 rotates forward, by small pulley 3, toothed belt 4 and large belt wheel 5 drive ball screw 7 to rotate, ball screw 7 drives the ball-screw nut 9 on it descending, and then promote first layer piston 11, spring 12, second layer piston 13 is descending, the hydraulic oil promoted in C chamber 17 flows to D chamber 20, thus promote third layer piston 21 with the speed fast downlink identical with second layer piston 13 with first layer piston 11, now, hydraulic oil in E chamber 22 flows into A chamber 9 and B chamber 16 by hydraulic pipe line 23, if now in A chamber 9, oil pressure is still not enough, then back pressure valve 14 is opened, hydraulic oil in C chamber 17 enters A chamber 9 part at the elastic force flows by action of spring 12, and the hydraulic oil continuation promotion third layer piston 21 of remainder moves downward in C chamber 17, oil hydraulic cylinder is pressurization stages at a slow speed, now the piston rod of first layer piston 11 has just entered small piston chamber 19, block the path between C chamber 17 and D chamber 20, hydraulic oil between C chamber 17 and D chamber 20 circulates no longer mutually, when first layer piston 11 continues descending, the hydraulic oil in C chamber 17 flows back in A chamber 9 and B chamber 16 by back pressure valve 14, hydraulic oil in small piston chamber 19 flows into D chamber 20, area due to third layer piston 21 is greater than the rod areas of first layer piston 11, there is very large pressure ratio, thus D chamber 20 is high-voltage oil cavity, thus achieves reinforcement, the hydraulic oil in E chamber 22 is also flowed in A chamber 9 and B chamber 16 by hydraulic pipe line 23, and when the piston rod of first layer piston 11 comes downwards to and fills up small piston chamber 19, third layer piston 21 arrives cylinder bottom and reaches range, and hydraulic cylinder works terminates, the hydraulic cylinder piston up backhaul stage, alternating current servomotor 1 reverses, ball screw 7 rotates and makes ball-screw nut 9 up, ball-screw nut 9 drives first layer piston 11, second layer piston 13 is up, the volume in A chamber 9 and B chamber 16 reduces, hydraulic oil wherein flows into E chamber 22 by hydraulic pipe line 23, start up at the piston rod of first layer piston 11 until leave in the stroke in small piston chamber 19, one-way valve 15 is opened, hydraulic oil in A chamber 9 flows into C chamber 17 by one-way valve 15, when the piston rod of first layer piston 11 leaves small piston chamber 19 completely, C chamber 17 is communicated with D chamber 20, the hydraulic oil in D chamber 20 flows into C chamber 17, C cavity pressure increases, one-way valve 15 is closed, C chamber 17 replenisher force feed is no longer given in A chamber 9, when continuing up, E chamber 22 is continued from A chamber 9 oil suction, it is up that the hydraulic oil in E chamber continues to promote third layer piston 21, until it resets.
The present invention compared with prior art, save the pumping plant in conventional cylinder, fuel tank, numerous and diverse hydraulic pipe line and hydrovalve, simple and compact for structure, failure rate is low, at piston rod output terminal installation position displacement sensor, and in high-voltage oil cavity setting pressure sensor, can conveniently by the closed loop control control of AC servo motor being realized to displacement, ouput force; Alternating current servo motor direct drives leading screw and drives piston linear motion, three layers of piston are adopted to obtain pressurized effect, hydraulic oil circulates in hydraulic cylinder inside, can react rapidly topping up and discharge opeing, and can convert its mode of structure according to different usage requirements when hydraulic cylinder works.
Accompanying drawing explanation
Fig. 1 is hydraulic cylinder structure schematic diagram of the present invention.
Fig. 2 is the first improved structure schematic diagram of oil hydraulic cylinder of the present invention.
Fig. 3 is oil hydraulic cylinder the second improved structure schematic diagram of the present invention.
Fig. 4 is the third improved structure schematic diagram of oil hydraulic cylinder of the present invention.
Fig. 5 is oil hydraulic cylinder supercharging schematic diagram of the present invention.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in further detail.
As shown in Figure 1, a kind of direct-drive supercharged formula of AC servo three layers of piston electrohydraulic cylinder, comprise the motor reducer 2 that alternating current servomotor 1 and machine shaft connect, the output shaft of motor reducer 2 connects a small pulley 3, motor reducer 2 is fixedly connected with fuselage 28, small pulley 3 connects a large belt wheel 5 by toothed belt 4, large belt wheel 5 is coupled as one with ball screw 7 by two large round nuts 6, ball screw 7 is connected with bearing 8 radial fit, bearing 8 and cylinder cap 29 are connect by screw, cylinder cap 29 with its above fuselage 28 and cylinder body 18 fixed connection below it, large belt wheel 5 drives ball screw 7 to rotate together, ball-screw nut 10 ball screw 7 is equipped with, ball-screw nut 10 and first layer piston 11 radial fit are coupled as one, the upper cover of piston rod of first layer piston 11 spring 12, the top and bottom of spring 12 contact with first layer piston 11 and second time piston 13 respectively, the piston rod radial fit of second layer piston 13 and first layer piston 11, cavity between first layer piston 11 with second layer piston 13 communicates with air, space between the upper-end surface of first layer piston 11 and cylinder body 18 is A chamber 9, B chamber 16 is formed between the piston rod of first layer piston 11 and ball screw 7, cylinder body 18 below second layer piston 13 is processed with small piston chamber 19, the cylinder body at place, small piston chamber 19, the piston rod of first layer piston 11, C chamber 17 is formed between second layer piston 13, third layer piston 21 is had below small piston chamber 19, the piston rod of third layer piston 21 can through the cylinder bottom 30 with cylinder body 18 fixed connection, externally exert a force when hydraulic cylinder works, the area of third layer piston 21 is greater than the rod areas of first layer piston 11, be D chamber 20 between third layer piston 21 and place, small piston chamber 19 cylinder body, small piston chamber 19 has been communicated with C chamber 17 and D chamber 20, space between third layer piston 21 and cylinder bottom 30 bottom surface is E chamber 22, A chamber 9 during hydraulic cylinder works, B chamber 16, C chamber 17, D chamber 20, all hydraulic oil is filled with in E chamber 22 and small piston chamber 19,
Hydraulic pipe line 23 is connected with between E chamber 22 and A chamber 9, in hydraulic cylinder piston fast downlink and pressurization stages at a slow speed, hydraulic oil in E chamber 22 is discharged to A chamber 9 and B chamber 16 by hydraulic pipe line 23, in the hydraulic cylinder piston backhaul stage, the hydraulic oil in A chamber 9 and B chamber 16 flows into 22 li, E chamber by hydraulic pipe line 23;
Back pressure valve 14 and one-way valve 15 are housed above cylinder body 18, the two ends of back pressure valve 14 connect A chamber 9 and C chamber 17 respectively, in the hydraulic cylinder piston fast downlink stage, when oil pressure in A chamber 9 is not enough, back pressure valve 14 is opened, the hydraulic oil in C chamber 17 in the elastic force effect of spring 12 to A chamber 9 replenisher force feed; In oil hydraulic cylinder pressurization stages at a slow speed, the piston rod of first layer piston 11 blocks up small piston chamber 19, and when first layer piston 11 is descending, back pressure valve 14 is opened, and the hydraulic oil in C chamber 17 flows into A chamber 9 and B chamber 16 by back pressure valve 14; The two ends of one-way valve 15 connect A chamber 9 and C chamber 17 respectively, and in the hydraulic cylinder piston backhaul stage, one-way valve 15 is opened, C chamber 17 oil suction from A chamber 9.
As shown in Figure 2, the basis of said structure is removed small pulley 3, toothed belt 4, large belt wheel 5, the output shaft of motor reducer 2 is connect by coupling 27 and ball screw 7, and during work, AC servo motor 1 is rotated by motor reducer 2, coupling 27 Direct driver ball screw 7.
As shown in Figure 3 and Figure 4, in order to improve the bearing capacity of oil hydraulic cylinder, ball screw 7 and ball-screw nut 9 are replaced with planetary roller screw 24, planetary roller screw nut 25 respectively, planetary roller screw nut 25 is by roller 26 and planetary roller screw 24 radial fit.
At the output terminal installation position displacement sensor of the piston rod of third layer piston 21, and in high-voltage oil cavity D chamber 20 setting pressure sensor, can conveniently by the closed loop control control of AC servo motor 1 being realized to displacement, ouput force.
As shown in Figure 5, the boosting method of the direct-drive supercharged formula of a kind of AC servo three layers of piston electrohydraulic cylinder, wherein Fig. 5-1 is the original state of oil hydraulic cylinder, prepare to start the hydraulic cylinder piston fast downlink stage, alternating current servomotor 1 rotates forward, by small pulley 3, toothed belt 4 and large belt wheel 5 drive ball screw 7 to rotate, ball screw 7 drives the ball-screw nut 9 on it descending, and then promote first layer piston 11, spring 12, second layer piston 13 is descending, the hydraulic oil promoted in C chamber 17 flows to D chamber 20, thus promote third layer piston 21 with the speed fast downlink identical with second layer piston 13 with first layer piston 11, now, hydraulic oil in E chamber 22 flows into A chamber 9 and B chamber 16 by hydraulic pipe line 23, if now in A chamber 9, oil pressure is still not enough, then back pressure valve 14 is opened, hydraulic oil in C chamber 17 enters A chamber 9 part at the elastic force flows by action of spring 12, and the hydraulic oil continuation promotion third layer piston 21 of remainder moves downward in C chamber 17.The piston rod being depicted as first layer piston 11 as Fig. 5-2 has just entered small piston chamber 19, now start oil hydraulic cylinder pressurization stages at a slow speed, the piston rod of first layer piston 11 has blocked the path between C chamber 17 and D chamber 20, and the hydraulic oil between C chamber 17 and D chamber 20 circulates no longer mutually.When first layer piston 11 continues descending, the hydraulic oil in C chamber 17 flows back in A chamber 9 and B chamber 16 by back pressure valve 14, hydraulic oil in small piston chamber 19 flows into D chamber 20, area due to third layer piston 21 is greater than the rod areas of first layer piston 11, there is very large pressure ratio, thus D chamber 20 is high-voltage oil cavity, thus achieves reinforcement, the hydraulic oil in E chamber 22 is also flowed in A chamber 9 and B chamber 16 by hydraulic pipe line 23, Fig. 5-3 is the state that the piston rod of oil hydraulic cylinder pressurization stages first layer piston 11 at a slow speed enters into small piston chamber 19 1 segment distance, the piston rod of first layer piston 11 continues to come downwards to when filling up small piston chamber 19 afterwards, third layer piston 21 arrives cylinder bottom and reaches range, Fig. 5-4 is the state that the piston rod of first layer piston 11 comes downwards to when filling up small piston chamber 19, now hydraulic cylinder works terminates, start the hydraulic cylinder piston up backhaul stage, alternating current servomotor 1 reverses, ball screw 7 rotates and makes ball-screw nut 9 up, ball-screw nut 9 drives first layer piston 11, second layer piston 13 is up, the volume in A chamber 9 and B chamber 16 reduces, hydraulic oil wherein flows into E chamber 22 by hydraulic pipe line 23, start up at the piston rod of first layer piston 11 until leave in the stroke in small piston chamber 19, one-way valve 15 is opened, hydraulic oil in A chamber 9 flows into C chamber 17 by one-way valve 15.When the piston rod of first layer piston 11 leaves small piston chamber 19 completely, C chamber 17 is communicated with D chamber 20, the hydraulic oil in D chamber 20 flows into C chamber 17, C cavity pressure increases, one-way valve 15 is closed, and C chamber 17 replenisher force feed is no longer given in A chamber 9, and when continuing up, E chamber 22 is continued from A chamber 9 oil suction, it is up that the hydraulic oil in E chamber continues to promote third layer piston 21, until it resets.The state when piston rod of first layer piston 11 has just left small piston chamber 19 when Fig. 5-5 is depicted as hydraulic cylinder piston backhaul, when Fig. 5-6 is depicted as oil hydraulic cylinder backhaul first layer piston 11 reset after state.
Working principle of the present invention is:
Under oil hydraulic cylinder original state, alternating current servomotor 1 rotates forward, ball screw 7 or planetary roller screw 24 is driven to rotate, ball-screw nut 9 or planetary roller screw nut 25 descending, and then promote first layer piston 11, spring 12, second layer piston 13 is descending, the hydraulic oil promoted in C chamber 17 flows to D chamber 20, thus promote third layer piston 21 with the speed fast downlink identical with second layer piston 13 with first layer piston 11, now, hydraulic oil in E chamber 22 flows into A chamber 9 and B chamber 16 by hydraulic pipe line 23, if now in A chamber 9, oil pressure is still not enough, then back pressure valve 14 is opened, hydraulic oil in C chamber 17 enters A chamber 12 part at the elastic force flows by action of spring 12, and the hydraulic oil continuation promotion third layer piston 21 of remainder moves downward in C chamber 17.Just start pressurization stages at a slow speed when the piston rod of first layer piston 11 comes downwards to and just enters small piston chamber 19, now stifled hydraulic oil between C chamber 17 and D chamber 20 circulates no longer mutually.When first stage piston first layer piston 11 continues descending, the hydraulic oil in C chamber 17 flows back in A chamber 9 and B chamber 16 by back pressure valve 14, hydraulic oil in small piston chamber 19 flows into D chamber 20, area due to third layer piston 21 is greater than the rod areas of first layer piston 11, there is very large pressure ratio, thus achieve reinforcement; The hydraulic oil in E chamber 22 is also flowed in A chamber 9 and B chamber 16 by hydraulic pipe line 23, and when the piston rod of first layer piston 11 comes downwards to and fills up small piston chamber 19, third layer piston 21 arrives cylinder bottom and reaches range, and hydraulic cylinder works terminates.Then hydraulic cylinder piston starts the backhaul up stage, alternating current servomotor 1 reverses, ball screw 7 rotates and makes ball-screw nut 9 up, ball-screw nut 9 drives first layer piston 11, second layer piston 13 up, the volume in A chamber 9 and B chamber 16 reduces, and hydraulic oil wherein flows into E chamber 22 by hydraulic pipe line 23, starts up until leave in the stroke in small piston chamber 19 at the piston rod of first layer piston 11, one-way valve 15 is opened, and the hydraulic oil in A chamber 9 flows into C chamber 17 by one-way valve 15.When the piston rod of first layer piston 11 leaves small piston chamber 19 completely, C chamber 17 is communicated with D chamber 20, the hydraulic oil in D chamber 20 flows into C chamber 17, C cavity pressure increases, one-way valve 15 is closed, and C chamber 17 replenisher force feed is no longer given in A chamber 9, and when continuing up, E chamber 22 is continued from A chamber 9 oil suction, it is up that the hydraulic oil in E chamber continues to promote third layer piston 21, until it resets.
In accompanying drawing: 1, alternating current servomotor; 2, motor reducer; 3, small pulley; 4, toothed belt; 5, large belt wheel; 6, large round nut; 7, ball screw; 8, bearing; 9, A chamber; 10, ball-screw nut; 11, first layer piston; 12, spring; 13, second layer piston; 14, back pressure valve; 15, one-way valve; 16, B chamber; 17, C chamber; 18, cylinder body; 19, small piston chamber; 20, D chamber; 21 third layer pistons; 22, E chamber; 23, hydraulic pipe line; 24, planetary roller screw; 25, planetary roller screw nut; 26, roller; 27, coupling; 28, fuselage; 29, cylinder cap; 30, cylinder bottom.
Claims (4)
1. the boosting method of the direct-drive supercharged formula of AC servo three layers of piston electrohydraulic cylinder, it is characterized in that: the hydraulic cylinder piston fast downlink stage, alternating current servomotor (1) rotates forward, by small pulley (3), toothed belt (4) and large belt wheel (5) drive ball screw (7) to rotate, ball screw (7) drives the ball-screw nut on it (9) descending, and then promote first layer piston (11), spring (12), second layer piston (13) is descending, the hydraulic oil promoted in C chamber (17) flows to D chamber (20), thus promote third layer piston (21) with the speed fast downlink identical with second layer piston (13) with first layer piston (11), now, hydraulic oil in E chamber (22) flows into A chamber (9) and B chamber (16) by hydraulic pipe line (23), if now A chamber (9) interior oil pressure is still not enough, then back pressure valve (14) is opened, hydraulic oil in C chamber (17) enters A chamber (9) part at the elastic force flows by action of spring (12), and hydraulic oil continuation promotion third layer piston (21) of C chamber (17) interior remainder moves downward, oil hydraulic cylinder is pressurization stages at a slow speed, now the piston rod of first layer piston (11) has just entered small piston chamber (19), block the path between C chamber (17) and D chamber (20), hydraulic oil between C chamber (17) and D chamber (20) circulates no longer mutually, when first layer piston (11) continues descending, the hydraulic oil in C chamber (17) flows back in A chamber (9) and B chamber (16) by back pressure valve (14), hydraulic oil in small piston chamber (19) flows into D chamber (20), area due to third layer piston (21) is greater than the rod areas of first layer piston (11), there is very large pressure ratio, thus D chamber (20) are high-voltage oil cavity, thus achieve reinforcement, the hydraulic oil in E chamber (22) also flows in A chamber (9) and B chamber (16) by hydraulic pipe line (23), when the piston rod of first layer piston (11) comes downwards to and fills up small piston chamber (19), third layer piston (21) arrives cylinder bottom and reaches range, and hydraulic cylinder works terminates, the hydraulic cylinder piston up backhaul stage, alternating current servomotor (1) reverses, ball screw (7) rotates and makes ball-screw nut (9) up, ball-screw nut (9) drives first layer piston (11), second layer piston (13) is up, the volume of A chamber (9) and B chamber (16) reduces, hydraulic oil wherein flows into E chamber (22) by hydraulic pipe line (23), start up at the piston rod of first layer piston (11) until leave in the stroke of small piston chamber (19), one-way valve (15) is opened, hydraulic oil in A chamber (9) flows into C chamber (17) by one-way valve (15), when the piston rod of first layer piston (11) leaves small piston chamber (19) completely, C chamber (17) is communicated with D chamber (20), the hydraulic oil in D chamber (20) flows into C chamber (17), C cavity pressure increases, one-way valve (15) is closed, C chamber (17) replenisher force feed is no longer given in A chamber (9), when continuing up, E chamber (22) continue from A chamber (9) oil suction, it is up that the hydraulic oil in E chamber continues to promote third layer piston (21), until it resets,
The direct-drive supercharged formula of described AC servo three layers of piston electrohydraulic cylinder, comprise the motor reducer (2) that alternating current servomotor (1) and machine shaft connect, the output shaft of motor reducer (2) connects a small pulley (3), small pulley (3) connects a large belt wheel (5) by toothed belt (4), large belt wheel (5) is coupled as one by two large round nuts (6) and ball screw (7), large belt wheel (5) drives ball screw (7) to rotate together, ball-screw nut (10) ball screw (7) is equipped with, ball-screw nut (10) and first layer piston (11) radial fit are coupled as one, the upper cover of piston rod of first layer piston (11) spring (12), the top and bottom of spring (12) contact with first layer piston (11) and second layer piston (13) respectively, the piston rod radial fit of second layer piston (13) and first layer piston (11), cavity between first layer piston (11) with second layer piston (13) communicates with air, space between the upper-end surface of first layer piston (11) and cylinder body (18) is A chamber (9), B chamber (16) is formed between the piston rod of first layer piston (11) and ball screw (7), the cylinder body (18) of second layer piston (13) below is processed with small piston chamber (19), the cylinder body at small piston chamber (19) place, the piston rod of first layer piston (11), C chamber (17) is formed between second layer piston (13), there is third layer piston (21) below, small piston chamber (19), the piston rod of third layer piston (21) can through the cylinder bottom (30) with cylinder body (18) fixed connection, externally exert a force when hydraulic cylinder works, the area of third layer piston (21) is greater than the rod areas of first layer piston (11), be D chamber (20) between third layer piston (21) and small piston chamber (19) place cylinder body, small piston chamber (19) has been communicated with C chamber (17) and D chamber (20), space between third layer piston (21) and cylinder bottom (30) is E chamber (22), during hydraulic cylinder works A chamber (9), B chamber (16), C chamber (17), D chamber (20), all hydraulic oil is filled with in E chamber (22) and small piston chamber (19),
Hydraulic pipe line (23) is connected with between E chamber (22) and A chamber (9), in hydraulic cylinder piston fast downlink and pressurization stages at a slow speed, hydraulic oil in E chamber (22) is discharged to A chamber (9) and B chamber (16) by hydraulic pipe line (23), in the hydraulic cylinder piston backhaul stage, it is inner that the hydraulic oil in A chamber (9) and B chamber (16) flows into E chamber (22) by hydraulic pipe line (23);
Back pressure valve (14) and one-way valve (15) are housed in the top of cylinder body (18), the two ends of back pressure valve (14) connect A chamber (9) and C chamber (17) respectively, in the hydraulic cylinder piston fast downlink stage, when oil pressure in A chamber (9) is not enough, back pressure valve (14) is opened, the hydraulic oil in C chamber (17) in the elastic force effect of spring (12) to A chamber (9) replenisher force feed; In oil hydraulic cylinder pressurization stages at a slow speed, the piston rod of first layer piston (11) blocks up small piston chamber (19), when first layer piston (11) is descending, back pressure valve (14) is opened, and the hydraulic oil of C chamber (17) flows into A chamber (9) and B chamber (16) by back pressure valve (14); The two ends of one-way valve (15) connect A chamber (9) and C chamber (17) respectively, and in the hydraulic cylinder piston backhaul stage, one-way valve (15) is opened, C chamber (17) oil suction from A chamber (9).
2. the boosting method of the direct-drive supercharged formula of a kind of AC servo according to claim 1 three layers of piston electrohydraulic cylinder, it is characterized in that: on the basis of said structure, remove small pulley (3), toothed belt (4), large belt wheel (5), the output shaft of motor reducer (2) is connect by coupling (27) and ball screw (7), and during work, alternating current servomotor (1) is rotated by motor reducer (2), coupling (27) Direct driver ball screw (7).
3. the boosting method of the direct-drive supercharged formula of a kind of AC servo according to claim 1 and 2 three layers of piston electrohydraulic cylinder, it is characterized in that: in order to improve the bearing capacity of oil hydraulic cylinder, ball screw (7) and ball-screw nut are used planetary roller screw (24), planetary roller screw nut (25) to replace respectively, planetary roller screw nut (25) is by roller (26) and planetary roller screw (24) radial fit.
4. the boosting method of the direct-drive supercharged formula of a kind of AC servo according to claim 1 three layers of piston electrohydraulic cylinder, it is characterized in that: at the output terminal installation position displacement sensor of the piston rod of third layer piston (21), and in high-voltage oil cavity D chamber (20) setting pressure sensor, can conveniently by the closed loop control control of alternating current servomotor (1) being realized to displacement, ouput force.
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| CN113027842B (en) * | 2021-03-29 | 2024-06-07 | 佛山市恒力泰机械有限公司 | Servo synchronous ejection system |
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| CN1418291A (en) * | 2000-03-15 | 2003-05-14 | 朱宰硕 | Hydraulic pressure booster cylinder |
| CN1485546A (en) * | 2003-08-19 | 2004-03-31 | 让 焦 | Hydraulic reinforcement electric cylinder |
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| KR100338496B1 (en) * | 1999-10-01 | 2002-05-30 | 주재석 | Hydraulic Pressure Intensifier |
| KR100486847B1 (en) * | 2002-12-31 | 2005-04-29 | 주재석 | Pressure Intensifying Cylinder |
| KR100733766B1 (en) * | 2004-04-19 | 2007-06-29 | 주재석 | Pressure Interensifying Cylinder |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1418291A (en) * | 2000-03-15 | 2003-05-14 | 朱宰硕 | Hydraulic pressure booster cylinder |
| CN1485546A (en) * | 2003-08-19 | 2004-03-31 | 让 焦 | Hydraulic reinforcement electric cylinder |
| CN102518926A (en) * | 2011-12-14 | 2012-06-27 | 河南科技大学 | Electric greasing device capable of controlling grease quantity |
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| CN103148046A (en) | 2013-06-12 |
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