CN110578732B - Energy storage type hydraulic cylinder with built-in welded piston rod - Google Patents

Energy storage type hydraulic cylinder with built-in welded piston rod Download PDF

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Publication number
CN110578732B
CN110578732B CN201910850076.6A CN201910850076A CN110578732B CN 110578732 B CN110578732 B CN 110578732B CN 201910850076 A CN201910850076 A CN 201910850076A CN 110578732 B CN110578732 B CN 110578732B
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China
Prior art keywords
cylinder
hydraulic cylinder
piston rod
control valve
piston
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CN201910850076.6A
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Chinese (zh)
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CN110578732A (en
Inventor
贺湘宇
肖广鑫
胡薜礼
谭丽莎
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Changsha University of Science and Technology
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Changsha University of Science and Technology
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/08Characterised by the construction of the motor unit
    • F15B15/14Characterised by the construction of the motor unit of the straight-cylinder type
    • F15B15/1423Component parts; Constructional details
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/08Characterised by the construction of the motor unit
    • F15B15/14Characterised by the construction of the motor unit of the straight-cylinder type
    • F15B15/1423Component parts; Constructional details
    • F15B15/1438Cylinder to end cap assemblies
    • F15B15/1442End cap sealings
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/08Characterised by the construction of the motor unit
    • F15B15/14Characterised by the construction of the motor unit of the straight-cylinder type
    • F15B15/1423Component parts; Constructional details
    • F15B15/1447Pistons; Piston to piston rod assemblies
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/08Characterised by the construction of the motor unit
    • F15B15/14Characterised by the construction of the motor unit of the straight-cylinder type
    • F15B15/1423Component parts; Constructional details
    • F15B15/1457Piston rods

Abstract

The invention provides a welded piston rod built-in energy storage type hydraulic cylinder, which comprises a welded piston rod, a cylinder piston, a control valve, a hydraulic cylinder and the like, wherein the piston and the piston rod are welded together, the piston and the piston rod are internally provided with the cylinder as energy storage units, and the principle of the control valve is utilized, so that not only can the hydraulic energy generated when the hydraulic cylinder retracts be recovered, but also the redundant energy generated when the hydraulic cylinder works can be recovered; when the hydraulic cylinder extends outwards, the control valve can be controlled to be opened, the hydraulic oil stored before is released to assist the hydraulic cylinder to extend outwards, and energy recycling is achieved. The invention reduces the energy loss of links such as control valves, pipelines and the like, greatly reduces the complexity and the volume of the system, can be directly applied to various hydraulic drive engineering applications, and improves the energy efficiency of a hydraulic transmission system.

Description

Energy storage type hydraulic cylinder with built-in welded piston rod
Technical Field
The invention relates to a built-in energy storage type hydraulic cylinder with a welded piston rod.
Background
The hydraulic cylinder is a linear executing element in a hydraulic transmission system and mainly comprises: piston, piston rod, cylinder cap parts.
In recent years, the energy regeneration technology of a hydraulic transmission system is widely applied, particularly, a hydraulic cylinder and an energy accumulator are combined to form a core part of the energy regeneration system, but the hydraulic cylinder and the energy accumulator are independent components of the hydraulic transmission system, and the energy regeneration system must be designed by considering the problems of control valves, pipelines, installation and the like between the hydraulic cylinder and the energy accumulator, so that the energy regeneration system is very complex and large in size and cannot completely meet the actual requirements of engineering application.
Disclosure of Invention
The invention aims to provide a built-in energy storage type hydraulic cylinder structure of a welding type piston rod, which is characterized in that: the hydraulic cylinder comprises a hydraulic cylinder body, an energy storage unit and a hydraulic cylinder working unit; the energy storage unit comprises a hydraulic cylinder oil inlet/outlet, a spring baffle, a control valve piston, a cylinder oil inlet/outlet, a control valve, a cylinder piston, a control valve oil inlet/outlet and a cylinder gas inlet/outlet; the hydraulic cylinder working unit comprises a hydraulic cylinder rodless cavity oil inlet/outlet, a hydraulic cylinder rod cavity oil inlet/outlet, a hydraulic cylinder sealing end cover, an end cover fixing screw and a welding type piston rod. A cylinder cavity is arranged in the welding type piston rod, a cylinder piston is arranged in the cylinder cavity, the cylinder piston can move in the cylinder cavity in a smooth mode, and a control valve is arranged between the cylinder cavity and the rodless cavity of the hydraulic cylinder. The rod part of the welded piston rod penetrates through a hydraulic cylinder sealing end cover and is installed on the oil cylinder body by utilizing an end cover fixing screw, and the rod part of the welded piston rod can move smoothly in the hydraulic cylinder sealing end cover.
Other aspects, objects, and advantages of the invention will become apparent from the following description taken in conjunction with the accompanying drawings.
Drawings
The accompanying drawings incorporated in and forming a part of the specification illustrate several aspects of the present invention and, together with the description, serve to explain the principles of the invention. In the drawings:
FIG. 1 is a perspective cross-sectional view of a welded piston rod built-in energy storage hydraulic cylinder;
FIG. 2 is a cross-sectional view of a welded piston rod built-in energy storage hydraulic cylinder;
fig. 3 is a sectional view of a control valve in a welded piston rod built-in accumulator cylinder.
In the above drawings: 1. the hydraulic cylinder comprises a hydraulic cylinder body, 10 parts of an energy storage unit, 11 parts of a hydraulic cylinder oil inlet/outlet, 12 parts of a spring baffle plate, 13 parts of a control valve piston, 14 parts of a cylinder oil inlet/outlet, 15 parts of a control valve, 16 parts of a cylinder piston, 17 parts of a control valve oil inlet/outlet, 18 parts of a cylinder gas inlet/outlet, 20 parts of a hydraulic cylinder working unit, 21 parts of a hydraulic cylinder rodless cavity oil inlet/outlet, 22 parts of a hydraulic cylinder rod cavity oil inlet/outlet, 23 parts of a hydraulic cylinder sealing end cover, 24 parts of an end cover fixing screw, 25 parts of a welding type piston rod.
Detailed Description
The invention will be described in detail with reference to the drawings and the detailed description.
The invention provides a welding type piston rod built-in energy storage type hydraulic cylinder, and referring to fig. 1, the welding type piston rod built-in energy storage type hydraulic cylinder is characterized in that: the hydraulic cylinder comprises a hydraulic cylinder body 1, an energy storage unit 10 and a hydraulic cylinder working unit 20.
Referring to fig. 2 to 3, the energy storage unit 10 includes a cylinder oil inlet/outlet port 11, a spring stopper 12, a control valve piston 13, a cylinder oil inlet/outlet port 14, a control valve 15, a cylinder piston 16, a control valve oil inlet/outlet port 17, and a cylinder gas inlet/outlet port 18.
The hydraulic cylinder working unit 20 comprises a hydraulic cylinder rodless cavity oil inlet/outlet 21, a hydraulic cylinder rod cavity oil inlet/outlet 22, a hydraulic cylinder sealing end cover 23, an end cover fixing screw 24 and a welding type piston rod 25.
A cylinder cavity is arranged in the welded piston rod 25, a cylinder piston 16 is arranged in the cylinder cavity, the cylinder piston 16 can move in the cylinder cavity in a smooth manner, and a control valve 15 is arranged between the cylinder cavity and the rodless cavity of the hydraulic cylinder; the rod part of the welded piston rod 25 passes through a hydraulic cylinder sealing end cover 23 and is mounted on the hydraulic cylinder body 1 by an end cover fixing screw 24, and the rod part of the welded piston rod 25 can move smoothly in the hydraulic cylinder sealing end cover 23.
The welded piston rod 25 is formed by welding a piston and a piston rod into a whole, a cylinder cavity is formed in the welded piston rod 25, oil flow direction control is achieved between the cylinder cavity and a rodless cavity of the hydraulic cylinder through a control valve 15, the control valve 15 is provided with a spring baffle plate 12, a control valve piston 13 and three oil inlet/outlet ports, and the three oil inlet/outlet ports are respectively an air cylinder oil inlet/outlet port 14, a control valve oil inlet/outlet port 17 and a hydraulic cylinder oil inlet/outlet port 11.
The specific working principle of the invention is as follows:
when the work is finished, when the welding type piston rod 25 retracts, when the piston on the welding type piston rod 25 moves downwards in the hydraulic cylinder cavity, hydraulic oil in the rodless cavity of the hydraulic cylinder is compressed, at the moment, high-pressure hydraulic oil in the rodless cavity of the hydraulic cylinder can enter through the hydraulic cylinder oil inlet/outlet 11 on the control valve 15 at the bottom of the piston of the welding type piston rod 25, the high-pressure oil pushes the spring baffle plate 12 in the control valve to compress, so that the hydraulic oil with pressure can enter the cylinder cavity at one end of the cylinder piston 16 from the cylinder oil inlet/outlet 14, the cylinder piston 16 is pushed to move in the cylinder cavity, gas in the cylinder cavity at the other end of the cylinder piston 16 is compressed, and after the gas is compressed to a certain amount, the spring baffle plate 12 returns to close the inlet.
When the hydraulic cylinder needs to work, low-pressure hydraulic oil can be introduced into the control valve oil inlet/outlet 17 on the control valve 15 to push the control valve piston 13 in the control valve 15 to move, so that the spring baffle plate 12 is compressed, at the moment, the compressed gas is released, the cylinder piston 16 is pushed, so that the oil enters a rodless cavity of the hydraulic cylinder from the hydraulic cylinder oil inlet/outlet 11 through the cylinder oil inlet/outlet 14, the auxiliary main oil circuit jointly pushes the welding type piston rod 25, the welding type piston rod 25 extends outwards, and energy recycling is achieved.

Claims (2)

1. A welded piston rod built-in energy storage type hydraulic cylinder comprises a hydraulic cylinder body (1), an energy storage unit (10) and a hydraulic cylinder working unit (20);
the hydraulic cylinder working unit (20) comprises a hydraulic cylinder rodless cavity oil inlet/outlet (21), a hydraulic cylinder rod cavity oil inlet/outlet (22), a hydraulic cylinder sealing end cover (23), an end cover fixing screw (24) and a welding type piston rod (25);
the part of the welding type piston rod (25) penetrates through a hydraulic cylinder sealing end cover (23) and is installed on the hydraulic cylinder body (1) by utilizing an end cover fixing screw (24), and the rod part of the welding type piston rod (25) moves smoothly in the hydraulic cylinder sealing end cover (23);
the method is characterized in that:
the energy storage unit (10) comprises a control valve (15), a cylinder piston (16) and a cylinder gas inlet/outlet (18);
a cylinder cavity is arranged in the welding type piston rod (25), a cylinder piston (16) is placed in the cylinder cavity, and the cylinder piston (16) moves in the cylinder cavity in a smooth mode;
a control valve (15) is arranged between the cylinder cavity and the rodless cavity of the hydraulic cylinder;
the control valve (15) is provided with a spring baffle plate (12), a control valve piston (13) and three oil inlet/outlet ports which are respectively a cylinder oil inlet/outlet port (14), a control valve oil inlet/outlet port (17) and a hydraulic cylinder oil inlet/outlet port (11);
the working principle of the welding type hydraulic cylinder with the built-in energy storage type piston rod is as follows:
1) when the work is finished, when the welding type piston rod (25) retracts, the piston on the welding type piston rod (25) moves downwards in the hydraulic cylinder cavity, hydraulic oil in the rodless cavity of the hydraulic cylinder is compressed, at the moment, high-pressure hydraulic oil in the rodless cavity of the hydraulic cylinder enters through a hydraulic cylinder oil inlet/outlet (11) on a control valve (15) at the bottom of the piston of the welding type piston rod (25), the high-pressure hydraulic oil pushes a spring baffle plate (12) in the control valve to compress, so that hydraulic oil with pressure enters a cylinder cavity at one end of a cylinder piston (16) from a cylinder oil inlet/outlet (14) to push the cylinder piston (16) to move in the cylinder cavity and compress gas in the cylinder cavity at the other end of the cylinder piston (16), when the gas is compressed to a certain amount, the spring baffle plate (12) returns to close the inlet, so that the purpose of energy recovery is achieved;
2) when the hydraulic cylinder needs to work, low-pressure hydraulic oil is introduced into a control valve oil inlet/outlet (17) on a control valve (15) to push a control valve piston (13) in the control valve (15) to move, so that a spring baffle plate (12) is compressed, at the moment, compressed gas is released, a cylinder piston (16) is pushed, oil enters a rodless cavity of the hydraulic cylinder from a hydraulic cylinder oil inlet/outlet (11) through a cylinder oil inlet/outlet (14), an auxiliary main oil way pushes a welding type piston rod (25) together, and the welding type piston rod (25) extends outwards, so that energy recycling is realized.
2. The internal energy storage type hydraulic cylinder with the welded piston rod as claimed in claim 1, wherein: the welding type piston rod (25) is formed by welding the piston and the piston rod into a whole.
CN201910850076.6A 2019-09-10 2019-09-10 Energy storage type hydraulic cylinder with built-in welded piston rod Active CN110578732B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201910850076.6A CN110578732B (en) 2019-09-10 2019-09-10 Energy storage type hydraulic cylinder with built-in welded piston rod

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Application Number Priority Date Filing Date Title
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CN110578732B true CN110578732B (en) 2021-04-23

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Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112681418A (en) * 2021-01-13 2021-04-20 长沙理工大学 Excavator operating device embeds perpendicular distributing type hydraulic pressure energy memory
CN113085114B (en) * 2021-04-06 2022-06-28 余姚市鹰图机械设备有限公司 Assembly process of double-oil-cylinder pushing mechanism for injection molding machine

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101312866A (en) * 2005-10-06 2008-11-26 克诺尔商用车制动系统有限公司 Combined service brake and spring-loaded brake cylinder with an inner ventilation
DE102007050350A1 (en) * 2007-09-21 2009-04-02 Thomas Sauer Double-acting hydraulic cylinder for use as hydraulically impinged linear motor in e.g. hydraulic excavator, has return stroke chamber and pre-stroke chambers enclosed to each other, where one of prestroke chambers is filled with pressure
CN106640839A (en) * 2017-03-21 2017-05-10 上海布拓传动系统设备有限公司 Oil cylinder with quick release function
CN108317127A (en) * 2018-04-11 2018-07-24 合肥长源液压股份有限公司 Novel energy-storage hydraulic cylinder

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101312866A (en) * 2005-10-06 2008-11-26 克诺尔商用车制动系统有限公司 Combined service brake and spring-loaded brake cylinder with an inner ventilation
DE102007050350A1 (en) * 2007-09-21 2009-04-02 Thomas Sauer Double-acting hydraulic cylinder for use as hydraulically impinged linear motor in e.g. hydraulic excavator, has return stroke chamber and pre-stroke chambers enclosed to each other, where one of prestroke chambers is filled with pressure
CN106640839A (en) * 2017-03-21 2017-05-10 上海布拓传动系统设备有限公司 Oil cylinder with quick release function
CN108317127A (en) * 2018-04-11 2018-07-24 合肥长源液压股份有限公司 Novel energy-storage hydraulic cylinder

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