CN108799222B - Hydraulic stepless voltage transformation system - Google Patents
Hydraulic stepless voltage transformation system Download PDFInfo
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- CN108799222B CN108799222B CN201810844001.2A CN201810844001A CN108799222B CN 108799222 B CN108799222 B CN 108799222B CN 201810844001 A CN201810844001 A CN 201810844001A CN 108799222 B CN108799222 B CN 108799222B
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- changing
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- 230000009466 transformation Effects 0.000 title description 6
- 230000007246 mechanism Effects 0.000 claims abstract description 12
- 230000033001 locomotion Effects 0.000 claims abstract description 6
- 239000003921 oil Substances 0.000 claims description 120
- 239000010720 hydraulic oil Substances 0.000 claims description 12
- 238000006073 displacement reaction Methods 0.000 claims description 4
- 230000002457 bidirectional effect Effects 0.000 abstract description 4
- 230000001105 regulatory effect Effects 0.000 description 6
- 230000006872 improvement Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
Abstract
The invention discloses a hydraulic stepless variable pressure system, which comprises a first sliding sleeve, a longitudinal guide rod, an adjusting mechanism, a first variable pressure cylinder and a second variable pressure cylinder; the two ends of the longitudinal guide rod are respectively connected with the first variable-pressure oil cylinder and the second variable-pressure oil cylinder through a second sliding sleeve; the adjusting mechanism is connected with the first sliding sleeve and can drive the first sliding sleeve to move up and down, and the longitudinal guide rod is sleeved in the first sliding sleeve; the first pressure-changing oil cylinder is connected with the first oil inlet oil way and the first oil outlet oil way, and the second pressure-changing oil cylinder is connected with the second oil inlet oil way and the second oil outlet oil way. According to the invention, the length of the arm of force at two sides of the longitudinal guide rod is controlled by the up-and-down movement of the first sliding sleeve, so that the hydraulic pressure is controlled, stepless regulation of the output hydraulic pressure is realized, and the bidirectional pressure increasing and reducing can be realized without resetting operation.
Description
Technical Field
The invention relates to a hydraulic pressure transformation system, in particular to a hydraulic stepless transformation system.
Background
The structure principle of the pressurizing oil circuit of the currently known hydraulic brick press is shown in fig. 1, and mainly comprises a cartridge valve oil circuit 1', a supercharger 2' and a pressurizing oil cylinder 3 '. The main functional element of the supercharger is a piston 4', which divides the supercharger into two oil chambers, s1 and s2 are respectively arranged on the action surfaces of the two oil chambers, and p1 and p2 are respectively arranged on the pressures of the two oil chambers. When the booster piston is force balanced, there is p1s1=p2s2, and assuming s1< s2, there is p1> p2. The pressurizing principle of the oil way is that oil with the pressure of p2 enters an oil cavity at the s2 end, a piston is pushed, the piston pushes the oil in the oil cavity at the s1 end to enter an oil cylinder 3, and when the piston is balanced, the pressure of the oil cylinder is p1, and the pressure is higher than the input oil pressure p2, so that the pressurizing is realized; otherwise, the pressure p1 is input from the s1 end, the oil is output to the oil cylinder from the s2 end, the pressure p2 is obtained, and the pressure is reduced.
The booster has a simple structure, and can form a boost pressure or a depressurization pressure when the pistons are balanced. However, when the oil intake pressure is constant and the piston shape is constant, the oil intake is cut off when the piston is not balanced, which may cause impact, and the actual output pressure may deviate from the desired value due to the influence of the controller, oil pressure fluctuation, and the like. In addition, if only decompression or pressurization is needed in one working cycle, the piston resetting operation is specially set, so that efficiency loss is caused.
Disclosure of Invention
The invention aims to solve the technical problem of providing a hydraulic stepless variable-pressure system, which can realize stepless regulation of output hydraulic pressure and can realize bidirectional pressurization and depressurization without resetting operation.
In order to solve the technical problems, the invention provides a hydraulic stepless variable-pressure system, which comprises a first sliding sleeve, a longitudinal guide rod, an adjusting mechanism, a first variable-pressure oil cylinder and a second variable-pressure oil cylinder;
the two ends of the longitudinal guide rod are respectively connected with the first variable-pressure oil cylinder and the second variable-pressure oil cylinder through a second sliding sleeve;
The adjusting mechanism is connected with the first sliding sleeve and can drive the first sliding sleeve to move up and down, and the longitudinal guide rod is sleeved in the first sliding sleeve;
The first pressure-changing oil cylinder is connected with the first oil inlet oil way and the first oil outlet oil way, and the second pressure-changing oil cylinder is connected with the second oil inlet oil way and the second oil outlet oil way.
As an improvement of the scheme, the device further comprises a transverse guide rod, the first sliding sleeve is fixedly arranged on the transverse guide rod, third sliding sleeves are arranged at two ends of the transverse guide rod, and the third sliding sleeves are sleeved into the positioning rods.
As an improvement of the scheme, the first oil outlet circuit and the second oil outlet circuit are connected with the executing element.
As an improvement of the scheme, a displacement sensor is arranged at the position of the transverse guide rod and the first pressure-changing oil cylinder or the second pressure-changing oil cylinder.
As an improvement of the scheme, the adjusting mechanism is a hydraulic cylinder, a linear motor or a linear motion mechanical device driven by the motor.
As an improvement of the scheme, the diameters of pistons of the first pressure-changing oil cylinder and the second pressure-changing oil cylinder are different.
The implementation of the invention has the following beneficial effects:
According to the invention, the length of the arm of force at two sides of the longitudinal guide rod is controlled by the up-and-down movement of the first sliding sleeve, so that the hydraulic pressure is controlled, stepless regulation of the output hydraulic pressure is realized, and the bidirectional pressure increasing and reducing can be realized without resetting operation.
By adopting the hydraulic pressure regulating device, the pressure reducing (boosting) value of the hydraulic pressure can be regulated in real time, the pressure can be changed, meanwhile, the speed can be changed, the requirement of a specific occasion on the hydraulic flow can be met, and the pressure consumption can be reduced and the speed can be increased.
Drawings
FIG. 1 is a schematic diagram of a prior art hydraulic stepless pressure change system;
Fig. 2 is a schematic diagram of a hydraulic stepless voltage transformation system of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings, for the purpose of making the objects, technical solutions and advantages of the present invention more apparent. It is only stated that the terms of orientation such as up, down, left, right, front, back, inner, outer, etc. used in this document or the imminent present invention, are used only with reference to the drawings of the present invention, and are not meant to be limiting in any way.
As shown in fig. 1 and 2, an embodiment of the present invention provides a hydraulic stepless variable pressure system, which comprises a transverse guide rod 1, a longitudinal guide rod 2, an adjusting mechanism 3, a first variable pressure cylinder 4 and a second variable pressure cylinder 5; the transverse guide rod 1 is fixedly provided with a first sliding sleeve 6, the longitudinal guide rod 2 is sleeved in the first sliding sleeve 6, the two ends of the transverse guide rod 1 are provided with third sliding sleeves 7, and the third sliding sleeves 7 are sleeved in positioning rods 8; the two ends of the longitudinal guide rod 2 are respectively connected with the first pressure-changing oil cylinder 4 and the second pressure-changing oil cylinder 5 through a second sliding sleeve 13, and the second sliding sleeve 13 can rotate relative to piston rods of the first pressure-changing oil cylinder 4 and the second pressure-changing oil cylinder 5; the adjusting mechanism 3 is connected with the transverse guide rod 1 and can drive the transverse guide rod 1 to move up and down; the first pressure-changing oil cylinder 4 is connected with a first oil inlet oil way 9 and a first oil outlet oil way 10, and the second pressure-changing oil cylinder 5 is connected with a second oil inlet oil way 11 and a second oil outlet oil way 12. The first oil outlet passage 10 and the second oil outlet passage 12 are both connected with an actuator 14. The actuator 14 is another hydraulic cylinder. The adjusting mechanism 3 is a hydraulic cylinder, a linear motor or a linear motion mechanical device driven by a motor, etc., and in this embodiment, the hydraulic cylinder is taken as an example, and is connected with an adjusting oil path 15.
When the hydraulic oil pump works, hydraulic oil enters the piston cavity of the first pressure changing oil cylinder 4 from the first oil inlet oil way 9 to push the piston rod to move leftwards, so that the longitudinal guide rod 2 is pushed to rotate clockwise. The power is transmitted to the second pressure changing oil cylinder 5 through the longitudinal guide rod 2, the piston of the second pressure changing oil cylinder 5 is driven to move rightwards, hydraulic oil in a piston cavity of the second pressure changing oil cylinder 5 is extruded, and the hydraulic oil enters the actuating element 14 through the second oil outlet oil way 12 to generate downward pressure. Conversely, hydraulic oil enters the second pressure changing oil cylinder 5 to push the longitudinal guide rod 2 to rotate anticlockwise, and hydraulic oil is discharged from the first pressure changing oil cylinder 4 to enter the executing element 14 to generate downward pressure.
Assuming that the piston areas of the first variable-pressure oil cylinder 4 and the second variable-pressure oil cylinder 5 are the same, the piston cavity oil pressure of the second variable-pressure oil cylinder 5 is p1, the piston cavity oil pressure of the first variable-pressure oil cylinder 4 is p2, the distance between the second sliding sleeve 13 of the second variable-pressure oil cylinder 5 and the connecting point of the transverse guide rod 1 and the longitudinal guide rod 2 is l1, the distance between the second sliding sleeve 13 of the first variable-pressure oil cylinder 4 and the connecting point of the transverse guide rod 1 and the longitudinal guide rod 2 is l2, and the included angle of the longitudinal guide rod 2 relative to the horizontal position is a. When the moment of the lever system formed by the first transformer cylinder 4, the second transformer cylinder 5, the transverse guide rod 1 and the longitudinal guide rod 2 is balanced, there is p1×sj1×sin (a) =p2×sj2×sin (a), that is, p1×l1=p2×l2.
When the regulating oil way 15 drives the piston of the regulating oil cylinder to move downwards, so that l1 is larger than l2, when the lever system is balanced, p1 is smaller than p2, and when oil enters from the second pressure changing oil cylinder 5, the first pressure changing oil cylinder 4 discharges, and the pressure is increased, and otherwise, the pressure is reduced. When the adjusting oil way 15 drives the piston of the adjusting oil cylinder to move upwards, l1 is smaller than l2, when the lever system is balanced, p1 is larger than p2, and at the moment, if oil enters from the second pressure changing oil cylinder 5, the first pressure changing oil cylinder 4 discharges, and is depressurized, and otherwise, is pressurized. The adjusting oil way 15 can stop the piston of the adjusting oil cylinder at any position, so that the force arms l1 and l2 can be continuously changed, namely, p1/p2 is a continuous value, namely, stepless voltage transformation is realized.
In order to simplify the structure, the transverse guide rod 1 can be omitted, and the first sliding sleeve 6 is directly driven to move up and down through the adjusting mechanism 3, so that the pressure ratio of the first pressure changing oil cylinder 4 and the second pressure changing oil cylinder 5 is controlled.
Preferably, a displacement sensor 16 is arranged at the position of the transverse guide rod 1 and the first pressure changing oil cylinder 4 or the second pressure changing oil cylinder 5. The positions of the transverse guide rod 1 and the piston rod of the first pressure changing oil cylinder 4 or the second pressure changing oil cylinder 5 are read through the displacement sensor 16, so that the pressure increasing or reducing ratio can be calculated, and intelligent stepless pressure regulation is realized.
Preferably, the diameters of the pistons of the first pressure changing cylinder 4 and the second pressure changing cylinder 5 can be different, so as to realize a wider pressure increasing and reducing range.
According to the invention, the length of the arm of force at two sides of the longitudinal guide rod is controlled by the up-and-down movement of the first sliding sleeve, so that the hydraulic pressure is controlled, stepless regulation of the output hydraulic pressure is realized, and the bidirectional pressure increasing and reducing can be realized without resetting operation.
By adopting the hydraulic pressure regulating device, the pressure reducing (boosting) value of the hydraulic pressure can be regulated in real time, the pressure can be changed, meanwhile, the speed can be changed, the requirement of a specific occasion on the hydraulic flow can be met, and the pressure consumption can be reduced and the speed can be increased.
The above disclosure is only a preferred embodiment of the present invention, and it is needless to say that the scope of the invention is not limited thereto, and therefore, the equivalent changes according to the claims of the present invention still fall within the scope of the present invention.
Claims (3)
1. The hydraulic stepless pressure changing system is characterized by comprising a transverse guide rod, a first sliding sleeve, a longitudinal guide rod, an adjusting mechanism, a first pressure changing oil cylinder and a second pressure changing oil cylinder;
the two ends of the longitudinal guide rod are respectively connected with the first variable-pressure oil cylinder and the second variable-pressure oil cylinder through a second sliding sleeve;
The adjusting mechanism is connected with the first sliding sleeve and can drive the first sliding sleeve to move up and down, and the longitudinal guide rod is sleeved in the first sliding sleeve;
the first variable-pressure oil cylinder is connected with a first oil inlet oil way and a first oil outlet oil way, and the second variable-pressure oil cylinder is connected with a second oil inlet oil way and a second oil outlet oil way;
The first sliding sleeve is fixedly arranged on the transverse guide rod, and third sliding sleeves are arranged at two ends of the transverse guide rod and sleeved in the positioning rod;
The adjusting mechanism is a hydraulic cylinder, a linear motor or a linear motion mechanical device driven by the motor;
the first oil outlet oil way and the second oil outlet oil way are connected with the executing element;
When the hydraulic oil pump works, hydraulic oil enters a piston cavity of the first pressure changing oil cylinder from the first oil inlet oil way to push the piston rod to move leftwards, so that the longitudinal guide rod is pushed to rotate clockwise; the power is transmitted to the second pressure-changing oil cylinder through the longitudinal guide rod, the piston of the second pressure-changing oil cylinder is driven to move rightwards, hydraulic oil in a piston cavity of the second pressure-changing oil cylinder is extruded, and the hydraulic oil enters the actuating element through a second oil outlet oil way to generate downward pressure;
otherwise, hydraulic oil enters the second pressure-changing oil cylinder to push the longitudinal guide rod to rotate anticlockwise, and hydraulic oil is discharged from the first pressure-changing oil cylinder to enter the executing element and can generate downward pressure.
2. The hydraulic stepless variable system of claim 1, wherein displacement sensors are arranged at the positions of the transverse guide rod and the first variable-pressure cylinder or the second variable-pressure cylinder.
3. The hydraulic stepless pressure changing system of claim 1, wherein the piston diameters of the first pressure changing cylinder and the second pressure changing cylinder are different.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810844001.2A CN108799222B (en) | 2018-07-27 | Hydraulic stepless voltage transformation system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810844001.2A CN108799222B (en) | 2018-07-27 | Hydraulic stepless voltage transformation system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108799222A CN108799222A (en) | 2018-11-13 |
| CN108799222B true CN108799222B (en) | 2024-04-19 |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1119174A (en) * | 1964-10-16 | 1968-07-10 | Wmf Wuerttemberg Metallwaren | Improvements in machines for brushing or polishing |
| GB1459533A (en) * | 1973-11-21 | 1976-12-22 | Poclain Sa | Pressurised fluid supply apparatus |
| CN203248429U (en) * | 2013-04-24 | 2013-10-23 | 浙江工商职业技术学院 | Double-acting hydraulic cylinder pressurization loop device |
| CN103921927A (en) * | 2014-04-18 | 2014-07-16 | 哈尔滨工程大学 | Crank and slider hydraulic transmission type cycloidal propeller mechanism |
| CN203717519U (en) * | 2013-12-18 | 2014-07-16 | 湖南特力液压有限公司 | Supercharging oil cylinder, supercharging system and sealing performance experiment table |
| CN107061392A (en) * | 2017-06-06 | 2017-08-18 | 山东建筑大学 | Mechanical arm hydraulic control circuit and method of operating |
| CN107401533A (en) * | 2017-08-08 | 2017-11-28 | 华南理工大学 | A kind of end control type internal-expansion type mechanical interlocking hydraulic jack and its operation method |
| CN209041200U (en) * | 2018-07-27 | 2019-06-28 | 佛山市恒力泰机械有限公司 | A kind of hydraulic stepless transformation system |
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1119174A (en) * | 1964-10-16 | 1968-07-10 | Wmf Wuerttemberg Metallwaren | Improvements in machines for brushing or polishing |
| GB1459533A (en) * | 1973-11-21 | 1976-12-22 | Poclain Sa | Pressurised fluid supply apparatus |
| CN203248429U (en) * | 2013-04-24 | 2013-10-23 | 浙江工商职业技术学院 | Double-acting hydraulic cylinder pressurization loop device |
| CN203717519U (en) * | 2013-12-18 | 2014-07-16 | 湖南特力液压有限公司 | Supercharging oil cylinder, supercharging system and sealing performance experiment table |
| CN103921927A (en) * | 2014-04-18 | 2014-07-16 | 哈尔滨工程大学 | Crank and slider hydraulic transmission type cycloidal propeller mechanism |
| CN107061392A (en) * | 2017-06-06 | 2017-08-18 | 山东建筑大学 | Mechanical arm hydraulic control circuit and method of operating |
| CN107401533A (en) * | 2017-08-08 | 2017-11-28 | 华南理工大学 | A kind of end control type internal-expansion type mechanical interlocking hydraulic jack and its operation method |
| CN209041200U (en) * | 2018-07-27 | 2019-06-28 | 佛山市恒力泰机械有限公司 | A kind of hydraulic stepless transformation system |
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| Date | Code | Title | Description |
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| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Address after: 528137 (F4), C District, science and Technology Industrial Zone, Sanshui, Guangdong, Foshan, China () Applicant after: FOSHAN HENGLITAI MACHINERY Co.,Ltd. Address before: 528137 District C, Sanshui Science and Technology Industrial Zone, Foshan City, Guangdong Province (FA) Applicant before: FOSHAN HENGLITAI MACHINERY Co.,Ltd. |
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| GR01 | Patent grant |