CN114658723B - Dynamic and static composite oil cylinder with independent dynamic and static liquid paths - Google Patents
Dynamic and static composite oil cylinder with independent dynamic and static liquid paths Download PDFInfo
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- CN114658723B CN114658723B CN202210581503.7A CN202210581503A CN114658723B CN 114658723 B CN114658723 B CN 114658723B CN 202210581503 A CN202210581503 A CN 202210581503A CN 114658723 B CN114658723 B CN 114658723B
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- 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
- 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
- F15B15/1404—Characterised by the construction of the motor unit of the straight-cylinder type in clusters, e.g. multiple cylinders in one block
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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
- F15B15/1409—Characterised by the construction of the motor unit of the straight-cylinder type with two or more independently movable working pistons
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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
- F15B15/1423—Component parts; Constructional details
- F15B15/1428—Cylinders
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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
- F15B15/1423—Component parts; Constructional details
- F15B15/1447—Pistons; Piston to piston rod assemblies
- F15B15/1452—Piston sealings
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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
- F15B15/1423—Component parts; Constructional details
- F15B15/1457—Piston rods
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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
- F15B15/1423—Component parts; Constructional details
- F15B15/1457—Piston rods
- F15B15/1461—Piston rod sealings
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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
- F15B15/149—Fluid interconnections, e.g. fluid connectors, passages
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Actuator (AREA)
Abstract
The invention discloses a dynamic and static composite oil cylinder with independent dynamic and static liquid paths, belongs to the technical field of hydraulic oil cylinders, and successfully solves the problems that two oil cylinders are required to be used conventionally or one oil cylinder is required to be matched with two sets of oil source equipment to realize two functions of dynamic and static states, so that the matched oil source equipment is complex and the equipment cost is increased. The invention comprises a static outer oil cylinder and a dynamic inner oil cylinder. The static outer oil cylinder comprises an outer cylinder body and an outer cylinder piston. The dynamic inner oil cylinder is formed by using a static outer oil cylinder piston rod as an inner cylinder body and installing an inner cylinder piston rod. The invention is suitable for equipment which uses a single oil cylinder and needs to simultaneously carry out dynamic alternating loading and static loading.
Description
Technical Field
The invention belongs to the technical field of hydraulic oil cylinders, and particularly relates to a dynamic and static composite oil cylinder with independent dynamic and static liquid paths.
Background
The hydraulic cylinder is a hydraulic actuator which converts hydraulic energy into mechanical energy and makes linear reciprocating motion (or swinging motion). It has simple structure and reliable operation. When it is used to implement reciprocating motion, it can omit speed-reducing device, and has no transmission gap, and its motion is stable, so that it can be extensively used in various mechanical hydraulic systems. The output force of the hydraulic cylinder is in direct proportion to the effective area of the piston and the pressure difference between the two sides of the effective area; the hydraulic cylinder is basically composed of a cylinder barrel and a cylinder cover, a piston and a piston rod, a sealing device, a buffering device and an exhaust device. The damping device and the exhaust device are determined according to specific application occasions, and other devices are necessary.
At present, two methods are usually adopted for realizing two functions of dynamic state and static state of the existing oil cylinder: one is to divide the dynamic state and the static state into two cylinders to operate respectively; the other is a double-output-shaft hydraulic cylinder which has both dynamic and static functions, but the method is limited by a servo valve: under the condition that the oil pressure meets the low pressure and high frequency of the servo valve, the force provided by static state is smaller; the static output force needs to be large, the cylinder diameter needs to be increased, and thus the flow is insufficient in a dynamic state; under the condition of meeting the static required flow, the high oil pressure is required again when the dynamic state is made, the maximum oil pressure of the servo valve is insufficient again, and the requirements on equipment and cost are greatly improved.
Besides the method, the prior art has failed to provide a single oil cylinder which can satisfy both dynamic tests and static tests, and does not need to provide an ultrahigh pressure oil source and an ultrahigh flow pump, because the functions are satisfied, a large-area cylinder body is needed, the static tests need to realize small-flow operation under the large-area cylinder body, accurate control is difficult to realize, and the dynamic tests can cause very large flow under the large-area cylinder body to ensure that the test frequency is improved, so that the flow of a matched pump station is very large, and the requirements on equipment are greatly improved.
Disclosure of Invention
The invention aims to:
in order to solve the problems that the running conditions are harsh and the cost is high due to the fact that additional supporting equipment needs to be additionally arranged for realizing two functions of a dynamic state and a static state of the oil cylinder in the prior art, the dynamic and static compound oil cylinder with independent dynamic and static liquid paths is provided.
The technical scheme adopted by the invention is as follows:
the utility model provides a sound composite cylinder with independent sound liquid way, hydro-cylinder in static outer hydro-cylinder and the developments, static outer hydro-cylinder includes static outer hydro-cylinder body and installs in the inside outer cylinder piston rod of static outer hydro-cylinder body, hydro-cylinder is including the interior hydro-cylinder shell of developments as outer cylinder piston rod in the developments, be connected with respectively between the outer hydro-cylinder shell of developments and the static outer hydro-cylinder body cylinder cover behind the preceding cylinder cap of outer cylinder and the outer cylinder, the cylinder cap is installed respectively on the both ends face of static outer hydro-cylinder body behind the preceding cylinder cap of outer cylinder and the outer cylinder, hydro-cylinder shell internally mounted has interior cylinder piston rod in the developments, be connected with interior cylinder piston head between interior cylinder piston rod and the dynamic interior hydro-cylinder shell.
Further, be provided with outer jar fluid circuit on the static outer cylinder body, outer jar fluid circuit intercommunication static outer cylinder body's inside and outside, be provided with the fluid circuit passageway with outer jar fluid circuit intercommunication on the outer jar rear cylinder cap, static outer cylinder body internally mounted has outer jar piston head assembly, outer jar piston head assembly installs on the hydro-cylinder shell in the developments.
Further, an inner cylinder hydraulic path is arranged on the dynamic inner cylinder shell and is communicated with the inside of the dynamic inner cylinder shell and the outside of the outer cylinder front cylinder cover, and an inner cylinder piston rod is arranged inside the dynamic inner cylinder shell through an inner cylinder cover and an outer cylinder piston head assembly which are arranged at the end part of the dynamic inner cylinder shell.
Furthermore, a dual-purpose sealing ring and a first combined sealing ring are respectively arranged at the joint of the outer cylinder piston head assembly and the static outer oil cylinder body.
Furthermore, a dustproof ring, a second combined sealing ring and a supporting belt are respectively arranged at the joint of the outer cylinder rear cylinder cover and the dynamic inner cylinder shell.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
1. when the dynamic inner oil cylinder shell is statically loaded, the dynamic inner oil cylinder shell serves as a piston rod of the static outer oil cylinder; when the dynamic alternating loading is carried out, the dynamic alternating loading cylinder serves as a cylinder body of the dynamic inner oil cylinder; the dynamic control and static control liquid paths are independent of each other, completely separated and do not interfere with each other, and the static oil pressure and the dynamic oil pressure are both oil sources with the same pressure. On the premise of realizing dynamic and static control, the use amount of the servo valve in the whole hydraulic system is reduced, and the maintenance cost of the servo valve is reduced. The dynamic oil cylinder and the static oil cylinder are integrated on the same oil cylinder to form the composite oil cylinder, and the effect of achieving the same load as that of a single oil cylinder is achieved.
2. Compared with the conventional double-outlet double-acting oil cylinder without dividing the inner cylinder and the outer cylinder, under the condition of large dynamic and static force difference, a large-flow or ultrahigh pressure pump station and a servo valve are not needed, the cost of additionally adding equipment for meeting dynamic and static loading requirements of the oil cylinder is saved, the running conditions of the dynamic and static oil cylinder are greatly reduced, and the applicability of the oil cylinder is remarkably improved. The invention can also be matched with an ultra-low speed oil source speed regulating device to carry out static test, thereby realizing running at ultra-low speed and obviously improving the precision of the stroke.
Drawings
Fig. 1 is a structural view of a cylinder according to the present invention.
The labels in the figure are: 1-inner cylinder cover, 2-outer cylinder front cylinder cover, 3-static outer cylinder body, 4-dynamic inner cylinder shell, 5-outer cylinder rear cylinder cover, 6-inner cylinder piston head, 7-inner cylinder piston rod, 8-dustproof ring, 9-second combined sealing ring, 10-supporting belt, 11-dual-purpose sealing ring, 12-first combined sealing ring and 13-outer cylinder piston head component.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the invention.
Example 1
As shown in fig. 1, a dynamic and static composite oil cylinder with independent dynamic and static liquid paths comprises a static outer oil cylinder and a dynamic inner oil cylinder, wherein the static outer oil cylinder comprises a static outer oil cylinder body 3 and an outer cylinder piston rod arranged inside the static outer oil cylinder body 3, the dynamic inner oil cylinder comprises a dynamic inner oil cylinder shell 4 used as an outer cylinder piston rod, an outer cylinder front cylinder cover 2 and an outer cylinder rear cylinder cover 5 are respectively connected between the dynamic inner oil cylinder shell 4 and the static outer oil cylinder body 3, the outer cylinder front cylinder cover 2 and the outer cylinder rear cylinder cover 5 are respectively arranged on two end faces of the static outer oil cylinder body 3, an inner cylinder piston rod 7 is arranged inside the dynamic inner oil cylinder shell 4, and an inner cylinder piston head 6 is connected between the inner cylinder piston rod 7 and the dynamic inner oil cylinder shell 4.
When the inner cylinder body is statically loaded, the inner cylinder body serves as a piston and a piston rod of an outer cylinder (static cylinder); when the dynamic alternating loading is carried out, the cylinder body is used as an inner cylinder (dynamic cylinder), two functions of static loading and dynamic loading are realized on the same oil cylinder, and the inner cylinder and the outer cylinder work independently and do not influence each other, so the static loading is not influenced by the dynamic cylinder and can independently and respectively operate.
Example 2
On the basis of the embodiment 1, the static outer cylinder body 3 is provided with an outer cylinder hydraulic path, the outer cylinder hydraulic path is communicated with the inside and the outside of the static outer cylinder body 3, the outer cylinder rear cylinder cover 5 is provided with a hydraulic path channel communicated with the outer cylinder hydraulic path, the static outer cylinder body 3 is internally provided with an outer cylinder piston head assembly 13, and the outer cylinder piston head assembly 13 is arranged on the dynamic inner cylinder shell 4.
Example 3
On the basis of the embodiment 1 and the embodiment 2, an inner cylinder hydraulic path is arranged on the dynamic inner cylinder shell 4, the inner cylinder hydraulic path is communicated with the inside of the dynamic inner cylinder shell 4 and the outside of the outer cylinder front cylinder cover 2, and the inner cylinder piston rod 7 is arranged inside the dynamic inner cylinder shell 4 through the inner cylinder cover 1 and the outer cylinder piston head assembly 13 which are arranged at the end part of the dynamic inner cylinder shell 4.
The joint of the external cylinder piston head assembly 13 and the static external oil cylinder body 3 is respectively provided with a dual-purpose sealing ring 11 and a first combined sealing ring 12.
The dynamic control and static control liquid paths of the oil cylinder are independent of each other, are completely separated and do not interfere with each other, and the static oil pressure and the dynamic oil pressure are low pressure, so that the using amount of a valve in the whole hydraulic system can be reduced and the maintenance cost of the valve can be reduced on the premise of simultaneously realizing the dynamic control and the static control.
Example 4
On the basis of the embodiment 1, the connection part of the outer cylinder rear cylinder cover 5 and the dynamic inner cylinder shell 4 is respectively provided with a dustproof ring 8, a second combined sealing ring 9 and a supporting belt 10.
The piston joint of the invention is provided with various sealing and dustproof structures, thereby ensuring that the sealing performance of the oil cylinder meets the operation under various pressure conditions and improving the operation stability of the device.
The working principle of the invention is as follows:
the dynamic control and static control liquid paths of the oil cylinder are mutually independent, so that the static outer oil cylinder and the dynamic inner oil cylinder can be respectively controlled and used and are respectively applied to a static loading test and a dynamic alternating loading test:
when a static loading test is carried out, the dynamic inner oil cylinder shell 4 serves as a piston rod of the static outer oil cylinder, the system controls hydraulic oil in the outer cylinder hydraulic path to be loaded, and the dynamic inner oil cylinder shell 4 moves together with the outer cylinder piston head assembly 13 under the driving of the outer cylinder piston head assembly 13, so that static loading is realized.
When a dynamic alternating loading test is carried out, the shell 4 of the dynamic inner oil cylinder is used as a cylinder body, a system controls hydraulic oil in a hydraulic circuit of the inner cylinder to load, and the piston head 6 of the inner cylinder drives the piston rod 7 of the inner cylinder to move under the hydraulic pushing action, so that the dynamic loading test is carried out by utilizing the dynamic inner oil cylinder with smaller volume and smaller dynamic flow.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (5)
1. The dynamic and static composite oil cylinder with the independent dynamic and static liquid paths is characterized by comprising a static outer oil cylinder and a dynamic inner oil cylinder, wherein the static outer oil cylinder comprises a static outer oil cylinder body (3) and an outer cylinder piston rod arranged inside the static outer oil cylinder body (3), the dynamic inner oil cylinder comprises a dynamic inner oil cylinder shell (4) used as the outer cylinder piston rod, an outer cylinder front cylinder cover (2) and an outer cylinder rear cylinder cover (5) are respectively connected between the dynamic inner oil cylinder shell (4) and the static outer oil cylinder body (3), the outer cylinder front cylinder cover (2) and the outer cylinder rear cylinder cover (5) are respectively arranged on two end faces of the static outer oil cylinder body (3), an inner cylinder piston rod (7) is arranged inside the dynamic inner oil cylinder shell (4), an inner cylinder piston head (6) is connected between the inner cylinder piston rod (7) and the dynamic inner cylinder shell (4), an outer cylinder piston head assembly (13) is arranged inside the static outer oil cylinder body (3), the outer cylinder piston head assembly (13) is arranged on the dynamic inner cylinder shell (4), and the inner cylinder piston rod (7) is arranged on the inner cylinder cover (1) and the outer cylinder piston head assembly (13) at the end part of the dynamic inner cylinder shell (4).
2. The dynamic-static composite oil cylinder with independent dynamic-static liquid paths according to claim 1 is characterized in that an outer cylinder liquid path is arranged on the static outer oil cylinder body (3), the outer cylinder liquid path is communicated with the inside and the outside of the static outer oil cylinder body (3), and a liquid path channel communicated with the outer cylinder liquid path is arranged on the outer cylinder rear cylinder cover (5).
3. The dynamic and static combined oil cylinder with the independent dynamic and static liquid paths as claimed in claim 2, characterized in that an inner cylinder liquid path is arranged on the dynamic inner oil cylinder shell (4), and the inner cylinder liquid path is communicated with the inside of the dynamic inner oil cylinder shell (4) and the outside of the outer cylinder front cylinder cover (2).
4. The dynamic-static combined oil cylinder with the independent dynamic-static liquid path is characterized in that a dual-purpose sealing ring (11) and a first combined sealing ring (12) are respectively arranged at the joint of the outer cylinder piston head assembly (13) and the static outer oil cylinder body (3).
5. The dynamic and static combined oil cylinder with the independent dynamic and static liquid paths is characterized in that a dustproof ring (8), a second combined sealing ring (9) and a supporting belt (10) are respectively arranged at the joint of the outer cylinder rear cylinder cover (5) and the dynamic inner oil cylinder shell (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210581503.7A CN114658723B (en) | 2022-05-26 | 2022-05-26 | Dynamic and static composite oil cylinder with independent dynamic and static liquid paths |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210581503.7A CN114658723B (en) | 2022-05-26 | 2022-05-26 | Dynamic and static composite oil cylinder with independent dynamic and static liquid paths |
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| Publication Number | Publication Date |
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| CN114658723A CN114658723A (en) | 2022-06-24 |
| CN114658723B true CN114658723B (en) | 2022-08-30 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2203698A1 (en) * | 1972-01-27 | 1973-08-02 | Schenck Gmbh Carl | HYDRAULIC TESTING MACHINE |
| GB1368569A (en) * | 1972-01-18 | 1974-10-02 | Schenck Gmbh Carl | Hydraulic testing machine |
| CN203881633U (en) * | 2014-06-03 | 2014-10-15 | 北京科技大学 | Horizontal type high tonnage fatigue test device capable of saving energy |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1214474A (en) * | 1967-08-01 | 1970-12-02 | Amsler Great Britain Ltd | Improvements in or relating to testing machines for applying compressive and/or tensile loads |
| JP2006220175A (en) * | 2005-02-08 | 2006-08-24 | Yuasa Technical Engineering Co Ltd | Servo jack device |
| CN103603842B (en) * | 2013-12-02 | 2015-12-30 | 北京乐冶液压气动设备技术有限公司 | A kind of compound start cylinder for vibration test and loading method thereof |
| US20210360879A1 (en) * | 2018-04-06 | 2021-11-25 | Tmk Energiakoura Oy | Hydraulic actuator, working device, and energy-wood grapple |
| CN209908892U (en) * | 2019-05-22 | 2020-01-07 | 徐州徐工液压件有限公司 | Combined stroke type relay propulsion oil cylinder structure |
| CN111637111B (en) * | 2020-06-05 | 2022-10-25 | 徐州徐工矿业机械有限公司 | Get-off tensioning hydraulic system of super-tonnage excavator |
-
2022
- 2022-05-26 CN CN202210581503.7A patent/CN114658723B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1368569A (en) * | 1972-01-18 | 1974-10-02 | Schenck Gmbh Carl | Hydraulic testing machine |
| DE2203698A1 (en) * | 1972-01-27 | 1973-08-02 | Schenck Gmbh Carl | HYDRAULIC TESTING MACHINE |
| CN203881633U (en) * | 2014-06-03 | 2014-10-15 | 北京科技大学 | Horizontal type high tonnage fatigue test device capable of saving energy |
Non-Patent Citations (1)
| Title |
|---|
| "动静三轴试验仪"伺服加载系统研究;桑勇等;《大连理工大学学报》;20100315(第02期);全文 * |
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