CN112032124B - Hydraulic control system - Google Patents
Hydraulic control system Download PDFInfo
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- CN112032124B CN112032124B CN202010956988.4A CN202010956988A CN112032124B CN 112032124 B CN112032124 B CN 112032124B CN 202010956988 A CN202010956988 A CN 202010956988A CN 112032124 B CN112032124 B CN 112032124B
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- oil
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- flexible hinge
- flexible
- hydraulic cylinder
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/20—Other details, e.g. assembly with regulating devices
- F15B15/22—Other details, e.g. assembly with regulating devices for accelerating or decelerating the stroke
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
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Abstract
A hydraulic system comprising: the hydraulic system comprises an oil tank, an oil pump, a filter, an overflow valve, a first electromagnetic valve, a second electromagnetic valve, a third electromagnetic valve, a fourth electromagnetic valve, a one-way valve, a first hydraulic cylinder, a second hydraulic cylinder and a third hydraulic cylinder; the oil tank, the filter, the oil pump and the one-way valve are sequentially connected to form an oil conveying path; a first oil way and a second oil way are arranged at the downstream of the one-way valve, a first electromagnetic valve is arranged on the first oil way, a second electromagnetic valve is arranged on the second oil way, the first oil way is connected with one ends of the first hydraulic cylinder, the second oil way is connected with the other ends of the first hydraulic cylinder, the second hydraulic cylinder and the third hydraulic cylinder; the first oil way is connected with the first oil return way, and the second oil way is connected with the second oil return way.
Description
Technical Field
The invention relates to the field of application of flexible mechanisms in hydraulic systems, in particular to a hydraulic system.
Background
The poisson's ratio is a basic parameter for structural deformation, and in common materials, poisson's ratio is generally a positive number, mostly ranging from 0 to 0.5. When a general material is stretched in one direction, its cross section shrinks with the stretching, whereas the cross section of a negative poisson's ratio material (auxetic material) expands with the stretching, such as single crystal sulfide ore, Polytetrafluoroethylene (PTFE) and silica with tetrahedrons.
Inspired by the physical properties of the negative poisson ratio material, researchers at home and abroad design a plurality of different negative poisson ratio structures. When the negative Poisson ratio structure is axially stressed, the negative Poisson ratio structure can simultaneously contract in the axial direction and the radial direction, has better rebound property and fracture resistance, and is widely applied to the aspects of buffering, energy absorption, bearing, explosion prevention, regulation of the space size of a robot and the like. In general, a negative poisson ratio structure is formed by periodically overlapping specially-shaped cells;
the specific deficiencies of prior art flexible mechanisms and structures are as follows:
1. the flexible mechanisms of the prior art, the cells are all complete connections between the individuals, but do not consider the functional differentiation between the cells of different configurations, and if the different cells are used for connection, the connection between the different structural configurations is difficult.
2. The connection between the cells in the prior art is only connection, but the connection is not refined, and the connection rigidity and the support performance cannot be guaranteed.
3. The ribs in the prior art only play a role in increasing the strength, and the stress direction and the bending resistance are not considered at all.
4. When the flexible mechanism in the prior art is applied, the flexible mechanism is additionally connected with a device by virtue of a connecting mechanism, and the adaptability and the detachability are not considered.
5. The hydraulic cylinder flexible structure in the prior art is often just a cushion pad, is easy to damage if thin, has poor effect, and loses space utilization rate if thick.
6. When the flexible mechanism in the prior art is directly used for buffering, no additional guide mechanism is arranged, and unexpected deformation of the flexible mechanism in the offset stress direction is easy to occur.
7. The cell element of the flexible mechanism in the prior art only provides damping force by bending deformation, while the damping force is provided by the deformation force in the linear direction, and the effect is provided by single force.
8. In most of the cells of the flexible mechanism in the prior art, a plurality of same cells are formed by linear superposition, and buffer support with higher strength is difficult to realize.
Disclosure of Invention
In order to overcome the above problems, the present invention proposes a solution to solve the above problems simultaneously.
The technical scheme adopted by the invention for solving the technical problems is as follows: a hydraulic system comprising: the hydraulic system comprises an oil tank, an oil pump, a filter, an overflow valve, a first electromagnetic valve, a second electromagnetic valve, a third electromagnetic valve, a fourth electromagnetic valve, a one-way valve, a first hydraulic cylinder, a second hydraulic cylinder and a third hydraulic cylinder;
the oil tank, the filter, the oil pump and the one-way valve are sequentially connected to form an oil conveying path; a first oil way and a second oil way are arranged at the downstream of the one-way valve, a first electromagnetic valve is arranged on the first oil way, a second electromagnetic valve is arranged on the second oil way, the first oil way is connected with one ends of the first hydraulic cylinder, the second oil way is connected with the other ends of the first hydraulic cylinder, the second hydraulic cylinder and the third hydraulic cylinder; the first oil way is connected with a first oil return way, the second oil way is connected with a second oil return way, the first oil return way is provided with a fourth electromagnetic valve, the second oil return way is provided with a third electromagnetic valve, a third oil way is also arranged between the oil pump and the oil tank, and the third oil way is internally provided with the overflow valve;
the first hydraulic cylinder, the second hydraulic cylinder, the third hydraulic cylinder and the fourth hydraulic cylinder are connected in series; the flexible mechanism is in a hollow cylindrical shape, a driving rod is arranged in the cylinder body and connected with the piston, a guide post is arranged on the surface of the piston, and the guide post is combined with or separated from the hollow interior of the flexible mechanism in the motion process of the piston; the surface of the flexible mechanism is provided with a cavity, and the position of the oil port corresponds to the flexible mechanism in a compressed state of the flexible mechanism; the flexible mechanism is arranged in the connecting sleeve;
the compliant mechanism includes a cell, the cell comprising: the first isosceles trapezoid plate, the second isosceles trapezoid plate, the A square block, the B square block, the C square block, the D square block, the first notched flexible hinge, the second notched flexible hinge, the third notched flexible hinge, the fourth notched flexible hinge, the first bending flexible hinge and the second bending flexible hinge;
the first bending type flexible hinge is connected between the square block A and the square block B, the second bending type flexible hinge is connected between the square block C and the square block D, the square block A is connected with the first notched type flexible hinge, the square block B is connected with the second notched type flexible hinge, the square block C is connected with the third notched type flexible hinge, the square block D is connected with the fourth notched type flexible hinge, the first isosceles trapezoid plate is connected between the first notched type flexible hinge and the fourth notched type flexible hinge, the second isosceles trapezoid plate is connected between the second notched type flexible hinge and the third notched type flexible hinge, and the first isosceles trapezoid plate and the second isosceles trapezoid plate extend downwards; bending lines are arranged in the middle of the first bending type flexible hinge and the second bending type flexible hinge; all square blocks and isosceles trapezoid plate thickness are m, and all breach formula flexible hinge's thickness is n, and satisfies: m/n is more than 3 and less than 6;
the flexible mechanism further comprises: the arch top surface, the half square block and the embedded plate are located on the upper portion of the flexible mechanism, the embedded plate is arranged on the lowest portion of the flexible mechanism, and the embedded plate is connected with grooves in the bottoms of the three hydraulic cylinders in a matched mode.
Further, the bottom surfaces of the first isosceles trapezoid plate and the second isosceles trapezoid plate are parallel to each other.
Further, m/n is 4.
Further, the number of the flexible mechanisms is five.
Further, the flexible mechanisms are distributed along the circumference.
Furthermore, the number of the guide posts is five.
Further, the guide posts are distributed along the circumference.
Further, the square blocks have four corners as connection positions.
Further, the semi-square block is a triangular block.
Furthermore, the cell is made of porous materials.
The beneficial effects and invention points of the invention are as follows:
1. to background art's 1 st point, adopted being connected between complete square piece and the half square piece, utilized the revolving force of half square piece to upwards jack up corresponding hinge and isosceles trapezoid board, form the hunch top surface, upwards jack up when encircleing the top surface and being compressed is higher than other surfaces (like figure 3) to not only utilize the elasticity performance of material itself, utilized the jacking force that the revolving force constructed more.
2. To background's 2 nd point, through setting up isosceles trapezoid board, the flexible hinge of formula of buckling to when being compressed, isosceles trapezoid board, the flexible hinge of formula of buckling are outstanding in to the space in the single compression space, have found more stable, the stronger compression space of support nature.
3. To the 3 rd point of background art, through the setting of isosceles trapezoid board, the direction that isosceles trapezoid board extends is the same with the direction of pressure, and isosceles trapezoid has strengthened bending resistance and intensity to constitute bending-resistant structure, not only increase intensity, strengthened bending resistance more.
4. To the 4 th point of background art, the isosceles trapezoid board of the bottom surface of every flexible mechanism constitutes the embedding board, and the embedding board is connected with the recess embedding that corresponds in the pneumatic cylinder, provides more stable connected mode.
5. To the 5 th point of the background art, the peripheral wall forms the cavity when the flexible mechanism is compressed, and the flexible mechanism is inside hollow, and oil can let into inside the flexible mechanism to flow out from the cavity, improved space utilization, the position of hydraulic fluid port corresponds with the cavity to construct the oil circuit.
6. Aiming at the 6 th point of the background technology, a guide post is designed, is positioned on the surface of a piston and can be matched with a hollow flexible mechanism to construct stroke guide.
7. To the 7 th point of the background art, through the square block arrangement in the cell element, the square block is rotated to form the screw force when being compressed, and the screw force can provide more stable buffer force.
8. To the 8 th point of the background art, compared with the linear arrangement in the prior art, the flexible mechanism arranged in a circular manner makes the buffering capacity stronger.
Note: the foregoing designs are not sequential, each of which provides a distinct and significant advance in the present invention over the prior art.
Drawings
The invention is further illustrated with reference to the following figures and examples.
FIG. 1 is an isometric view of a compliant mechanism of the present invention in an unstressed condition
FIG. 2 is an axial side view of a compliant mechanism of the present invention in axial tension
FIG. 3 is an axial side view of a compliant mechanism of the present invention in an axially stressed condition
FIG. 4 is an isometric view of a single cell of the present invention in an unstressed state
FIG. 5 is an axial side view of a single cell of the present invention under axial tension
FIG. 6 is an axial side view of a single cell of the present invention under axial compression
FIG. 7 is a schematic view of a hydraulic cylinder according to the present invention
FIG. 8 is a hydraulic control system diagram of the present invention
In the figures, the reference numerals are as follows:
1-cell element, 2-square block assembly, 101-first isosceles trapezoid plate, 102-second isosceles trapezoid plate, 103-A square block, 104-B square block, 105-C square block, 106-D square block, 107-first notch type flexible hinge, 108-first bending type flexible hinge, 109-second notch type flexible hinge, 110-third notch type flexible hinge, 111-second bending type flexible hinge, 112-fourth notch type flexible hinge, 3-arch top surface, 4-half square block, 5-embedded plate, 6-driving rod, 7-piston, 8-flexible mechanism, 9-guide column, 10-oil port, 11-cylinder body, 12-connecting sleeve, 13-oil tank, 14-oil pump, 15-filter, 16-overflow valve, 17-first electromagnetic valve, 18-second electromagnetic valve, 19-third electromagnetic valve, 20-fourth electromagnetic valve, 21-one-way valve, 22-first hydraulic cylinder, 23-second hydraulic cylinder and 24-third hydraulic cylinder.
Detailed Description
As shown in the figure: a hydraulic system comprising: the hydraulic control system comprises an oil tank 13, an oil pump 14, a filter 15, an overflow valve 16, a first electromagnetic valve 17, a second electromagnetic valve 18, a third electromagnetic valve 19, a fourth electromagnetic valve 20, a check valve 21, a first hydraulic cylinder 22, a second hydraulic cylinder 23 and a third hydraulic cylinder 24;
the oil tank 13, the filter 15, the oil pump 14 and the one-way valve 21 are sequentially connected to form an oil delivery path; a first oil way and a second oil way are arranged at the downstream of the check valve 21, a first electromagnetic valve 17 is arranged on the first oil way, a second electromagnetic valve 18 is arranged on the second oil way, the first oil way is connected with one ends of the first hydraulic cylinder, the second oil way is connected with the other ends of the first hydraulic cylinder, the second hydraulic cylinder and the third hydraulic cylinder; the first oil way is connected with a first oil return way, the second oil way is connected with a second oil return way, the first oil return way is provided with a fourth electromagnetic valve 20, the second oil return way is provided with a third electromagnetic valve 19, a third oil way is also arranged between the oil pump 14 and the oil tank 13, and the third oil way is internally provided with the overflow valve 16;
as shown in the figure: the first hydraulic cylinder, the second hydraulic cylinder and the third hydraulic cylinder respectively comprise a cylinder body 11, a driving rod 6, a piston 7, a guide post 9, an oil port 10, a flexible mechanism 8 and a connecting sleeve 12; the flexible mechanism 8 is in a hollow cylindrical shape, a driving rod 6 is arranged in a cylinder body 11, the driving rod 6 is connected with a piston 7, a guide column 9 is arranged on the surface of the piston 7, and the guide column 9 is combined with or separated from the hollow interior of the flexible mechanism 8 in the movement process of the piston 7; the surface of the flexible mechanism 8 is provided with a cavity, and the position of the oil port 10 corresponds to the flexible mechanism 8 in a compressed state of the flexible mechanism 8; the flexible mechanism 8 is arranged in the connecting sleeve 12;
the flexible mechanism 8 comprises a cell 1, the cell 1 comprising: a first isosceles trapezoid plate 101, a second isosceles trapezoid plate 102, an A square block 103, a B square block 104, a C square block 105, a D square block 106, a first notched flexible hinge 107, a second notched flexible hinge 109, a third notched flexible hinge 110, a fourth notched flexible hinge 112, a first bent flexible hinge 108, and a second bent flexible hinge 111;
as shown in the figure: the first bending type flexible hinge 108 is connected between the A square block 103 and the B square block 104, the second bending type flexible hinge 111 is connected between the C square block 105 and the D square block 106, the A square block 103 is connected with the first notched type flexible hinge 107, the B square block 104 is connected with the second notched type flexible hinge 109, the C square block 105 is connected with the third notched type flexible hinge 110, the D square block 106 is connected with the fourth notched type flexible hinge 112, the first notched type flexible hinge 107 is connected with the fourth notched type flexible hinge 112, the first isosceles trapezoid plate 101 is connected between the first notched type flexible hinge 107 and the fourth notched type flexible hinge 112, the second isosceles trapezoid plate 102 is connected between the second notched type flexible hinge 109 and the third notched type flexible hinge 110, and the first isosceles trapezoid plate 101 and the second isosceles trapezoid plate 102 extend downwards; bending lines are arranged in the middle of the first bending type flexible hinge 108 and the second bending type flexible hinge 111; all square blocks and isosceles trapezoid plate thickness are m, and all breach formula flexible hinge's thickness is n, and satisfies: m/n is more than 3 and less than 6;
the flexible mechanism 8 further comprises: the arch top surface 3, the half-square block 4 and the embedded plate 5 are arranged on the upper portion of the flexible mechanism 8, the embedded plate 5 is arranged on the lowest portion of the flexible mechanism 8, and the embedded plate 5 is connected with a groove in the bottom of the hydraulic cylinder in a matched mode.
The bottom surfaces of the first isosceles trapezoidal plate 101 and the second isosceles trapezoidal plate 102 are parallel to each other. The value of m/n is 4. The number of the flexible mechanisms 8 is five. Said flexible means 8 are distributed along the circumference. The number of the guide posts 9 is five. The guide posts 9 are distributed along the circumference. The square blocks take four corners as connecting positions. The semi-square block 4 is a triangular block. The cell 1 is made of porous material.
The above detailed description is specific to possible embodiments of the present invention, and the embodiments are not intended to limit the scope of the present invention, and all equivalent implementations or modifications that do not depart from the scope of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A hydraulic system, comprising: the hydraulic control system comprises an oil tank (13), an oil pump (14), a filter (15), an overflow valve (16), a first electromagnetic valve (17), a second electromagnetic valve (18), a third electromagnetic valve (19), a fourth electromagnetic valve (20), a one-way valve (21), a first hydraulic cylinder (22), a second hydraulic cylinder (23) and a third hydraulic cylinder (24);
the oil tank (13), the filter (15), the oil pump (14) and the one-way valve (21) are sequentially connected to form an oil delivery way; a first oil way and a second oil way are arranged at the downstream of the one-way valve (21), a first electromagnetic valve (17) is arranged on the first oil way, a second electromagnetic valve (18) is arranged on the second oil way, the first oil way is connected with one ends of the first hydraulic cylinder to the third hydraulic cylinder, and the second oil way is connected with the other ends of the first hydraulic cylinder to the third hydraulic cylinder; the first oil way is connected with a first oil return way, the second oil way is connected with a second oil return way, the first oil return way is provided with a fourth electromagnetic valve (20), the second oil return way is provided with a third electromagnetic valve (19), a third oil way is also arranged between the oil pump (14) and the oil tank (13), and the third oil way is internally provided with the overflow valve (16);
the first hydraulic cylinder, the second hydraulic cylinder and the third hydraulic cylinder respectively comprise a cylinder body (11), a driving rod (6), a piston (7), a guide post (9), an oil port (10), a flexible mechanism (8) and a connecting sleeve (12); the flexible mechanism (8) is in a hollow cylindrical shape, a driving rod (6) is arranged in a cylinder body (11), the driving rod (6) is connected with a piston (7), a guide column (9) is arranged on the surface of the piston (7), and the guide column (9) is combined with or separated from the hollow interior of the flexible mechanism (8) in the movement process of the piston (7); the surface of the flexible mechanism (8) is provided with a cavity, and the position of the oil port (10) corresponds to the flexible mechanism (8) in the compressed state of the flexible mechanism (8); the flexible mechanism (8) is arranged in the connecting sleeve (12);
the flexible mechanism (8) comprises a cell (1), the cell (1) comprising: the folding type folding ladder comprises a first isosceles trapezoid plate (101), a second isosceles trapezoid plate (102), an A square block (103), a B square block (104), a C square block (105), a D square block (106), a first notch type flexible hinge (107), a second notch type flexible hinge (109), a third notch type flexible hinge (110), a fourth notch type flexible hinge (112), a first bending type flexible hinge (108) and a second bending type flexible hinge (111);
connect between A square piece (103) and B square piece (104) first flexible hinge of bending formula (108), connect between C square piece (105) and D square piece (106) second flexible hinge of bending formula (111), A square piece (103) with first flexible hinge of breach formula (107) is connected, B square piece (104) with second flexible hinge of breach formula (109) is connected, C square piece (105) with third flexible hinge of breach formula (110), D square piece (106) with fourth flexible hinge of breach formula (112) is connected, first flexible hinge of breach formula (107) with fourth flexible hinge of breach formula (112) is connected first waist trapezoidal plate (101), connect between second flexible hinge of breach formula (109) and third flexible hinge of breach formula (110) second waist trapezoidal plate (102), the first isosceles trapezoid plate (101) and the second isosceles trapezoid plate (102) extend downwards; bending lines are arranged in the middle of the first bending type flexible hinge (108) and the second bending type flexible hinge (111); all square blocks and isosceles trapezoid plate thickness are m, and all breach formula flexible hinge's thickness is n, and satisfies: m/n is more than 3 and less than 6;
the flexible mechanism (8) further comprises: encircle top surface (3), half square block (4), inlay board (5), half square block (4) and encircle top surface (3) and be located the upper portion of flexible mechanism (8), flexible mechanism (8) below is equipped with inlay board (5), inlay board (5) are connected with the recess cooperation of pneumatic cylinder bottom.
2. A hydraulic system according to claim 1, wherein: the bottom surfaces of the first isosceles trapezoid plate (101) and the second isosceles trapezoid plate (102) are parallel to each other.
3. A hydraulic system according to claim 1, wherein: the value of m/n is 4.
4. A hydraulic system according to claim 1, wherein: the number of the flexible mechanisms (8) is five.
5. A hydraulic system according to claim 4, wherein: the flexible means (8) are distributed along the circumference.
6. A hydraulic system according to claim 5, wherein: the number of the guide posts (9) is five.
7. The hydraulic system of claim 6, wherein: the guide posts (9) are distributed along the circumference.
8. A hydraulic system according to claim 1, wherein: the square blocks take four corners as connecting positions.
9. A hydraulic system according to claim 1, wherein: the semi-square block (4) is a triangular block.
10. A hydraulic system according to claim 1, wherein: the cell (1) is made of porous material.
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| CN202010956988.4A CN112032124B (en) | 2020-09-12 | 2020-09-12 | Hydraulic control system |
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| CN202010956988.4A CN112032124B (en) | 2020-09-12 | 2020-09-12 | Hydraulic control system |
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| CN112032124A CN112032124A (en) | 2020-12-04 |
| CN112032124B true CN112032124B (en) | 2022-08-02 |
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| CN111412188A (en) * | 2020-04-24 | 2020-07-14 | 扬州黎明钻具有限公司 | Hydraulic device of trenchless drill rod double-head lathe |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106089828A (en) * | 2016-08-05 | 2016-11-09 | 杭州流控机器制造有限公司 | A kind of hydraulic control circuit for dumper |
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2020
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| JP2010051586A (en) * | 2008-08-28 | 2010-03-11 | Actlas:Kk | Displacement measuring sensor and displacement measuring system |
| CN103708381A (en) * | 2013-12-17 | 2014-04-09 | 天津大学 | Roller shifting system with self-guide function |
| EP3135949A1 (en) * | 2015-08-27 | 2017-03-01 | Airbus Operations S.L. | Deformable structure for absorption of energy from mechanical and/or acoustic impacts |
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