阅读说明：本技术 一种缸底储能型液压缸 (Cylinder bottom energy storage type hydraulic cylinder ) 是由 贺湘宇 蒋瑛 肖广鑫 胡薜礼 谭丽莎 于 2019-09-10 设计创作，主要内容包括：本发明提供一种缸底储能型液压缸,其中包括底部气缸、气缸活塞、控制阀以及液压缸等,本发明利用底部气缸作为储能单元,利用控制阀原理,对液压缸回缩时产生的液压能进行回收；而当液压缸外伸时,使控制阀打开,将储存好的液压油释放辅助油缸外伸,实现能量再利用。本发明不仅减少了控制阀和管路等环节能量损失,也大幅降低了液压系统的复杂程度和体积,并可直接应用于各类液压驱动的工程应用,提高液压传动系统的能量效率。(The invention provides a cylinder bottom energy storage type hydraulic cylinder, which comprises a bottom cylinder, a cylinder piston, a control valve, a hydraulic cylinder and the like, wherein the bottom cylinder is used as an energy storage unit, and the hydraulic energy generated when the hydraulic cylinder retracts is recovered by utilizing the principle of the control valve; when the hydraulic cylinder extends outwards, the control valve is opened, the stored hydraulic oil is released to extend outwards of the auxiliary cylinder, and energy recycling is achieved. The invention not only reduces the energy loss of links such as control valves and pipelines, but also greatly reduces the complexity and the volume of the hydraulic system, and can be directly applied to various hydraulic drive engineering applications, thereby improving the energy efficiency of the hydraulic transmission system.)

1. The utility model provides a cylinder bottom energy storage type pneumatic cylinder which characterized in that: comprises a hydraulic cylinder body (1), an energy storage unit (10) and a hydraulic cylinder working unit (20);

the energy storage unit (10) comprises a cylinder gas inlet/outlet (11), a cylinder piston (12), a control valve (13), a spring baffle plate (14), a control valve piston (15), a cylinder oil inlet/outlet (16), a control valve oil inlet/outlet (17) and a hydraulic cylinder oil inlet/outlet (18);

the hydraulic cylinder working unit (20) comprises a hydraulic cylinder rodless cavity oil inlet/outlet (21), a piston fixing nut (22), a hydraulic cylinder piston (23), a buffer sleeve (24), a hydraulic cylinder rod cavity oil inlet/outlet (25), a hydraulic cylinder sealing end cover (26), an end cover fixing screw (27) and a hydraulic cylinder piston rod (28);

a cylinder piston (12) is arranged in a cylinder cavity at the bottom of the hydraulic cylinder body (1), the cylinder piston (12) can move in the cylinder body, and a control valve (13) is arranged between the cylinder cavity and a rodless cavity of the hydraulic cylinder;

the hydraulic cylinder comprises a hydraulic cylinder body (1), a hydraulic cylinder piston (23) and a buffer sleeve (24), wherein the hydraulic cylinder piston (23) is arranged in a hydraulic cylinder cavity of the hydraulic cylinder body (1), the hydraulic cylinder piston (23) is arranged at one end of a hydraulic cylinder piston rod (28) through a piston fixing nut (22), and the buffer sleeve (24) is arranged between the hydraulic cylinder piston (23) and the hydraulic cylinder piston rod (28), and can move smoothly in the hydraulic cylinder cavity;

the other end of the hydraulic cylinder piston rod (28) penetrates through a hydraulic cylinder sealing end cover (26) and is installed on the hydraulic cylinder body (1) through an end cover fixing screw (27), and the hydraulic cylinder piston rod (28) can move smoothly in the hydraulic cylinder sealing end cover (26).

2. The cylinder bottom energy storage type hydraulic cylinder according to claim 1, characterized in that: the hydraulic cylinder block (1) has a cylinder chamber and a hydraulic cylinder chamber.

3. The cylinder bottom energy storage type hydraulic cylinder according to claim 1, characterized in that: between the cylinder cavity and the rodless cavity of the hydraulic cylinder, the oil flow direction control is realized through a control valve (13).

4. A cylinder bottom energy storage type hydraulic cylinder according to claim 3, characterized in that: the control valve (13) is provided with a spring baffle plate (14), a control valve piston (15) and three oil inlet/outlet ports which are respectively a cylinder oil inlet/outlet port (16), a control valve oil inlet/outlet port (17) and a hydraulic cylinder oil inlet/outlet port (18).

Technical Field

The invention relates to a cylinder bottom energy storage type hydraulic cylinder, in particular to a cylinder bottom energy storage type hydraulic cylinder capable of realizing hydraulic potential energy regeneration of engineering equipment and vehicle active hydraulic suspension energy regeneration.

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, energy regeneration technology of hydraulic transmission systems is widely applied, and particularly, a hydraulic cylinder and an accumulator are combined to form a core part of the energy regeneration system. However, the hydraulic cylinder and the accumulator are independent components of the hydraulic transmission system, and the design of the energy regeneration system must consider the problems of control valves, pipelines, installation and the like between the hydraulic cylinder and the accumulator, so that the energy regeneration system is very complex and large in size and cannot completely meet the actual requirements of engineering application. Therefore, if the energy storage module can be directly arranged in the hydraulic cylinder, renewable energy can be directly stored in the energy storage module, energy loss in links such as a control valve and a pipeline is reduced, complexity and size of a regeneration system are greatly reduced, the hydraulic drive system can be directly applied to engineering application of various hydraulic drives, and energy efficiency of the hydraulic drive system is improved.

Disclosure of Invention

In order to solve the problem that a common hydraulic cylinder has no built-in energy storage link, the invention discloses a cylinder bottom energy storage type hydraulic cylinder 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 cylinder gas inlet/outlet, a cylinder piston, a control valve, a spring baffle, a control valve piston, a cylinder oil inlet/outlet, a control valve oil inlet/outlet and a hydraulic cylinder oil inlet/outlet; the hydraulic cylinder working unit comprises a hydraulic cylinder rodless cavity oil inlet/outlet, a piston fixing nut, a hydraulic cylinder piston, a buffer sleeve, a hydraulic cylinder rod cavity oil inlet/outlet, a hydraulic cylinder sealing end cover, an end cover fixing screw and a hydraulic cylinder piston rod; a cylinder piston is arranged in a cylinder cavity at the bottom of the hydraulic cylinder body, the cylinder piston can move in the cylinder body, and a control valve is arranged between the cylinder cavity and a rodless cavity of the hydraulic cylinder; the hydraulic cylinder comprises a hydraulic cylinder cavity, a hydraulic cylinder piston is arranged at one end of a hydraulic cylinder piston rod through a piston fixing nut, and a buffer sleeve is arranged between the hydraulic cylinder piston and the hydraulic cylinder piston rod, wherein the hydraulic cylinder piston can move smoothly in the hydraulic cylinder cavity; the other end of the hydraulic cylinder piston rod penetrates through a hydraulic cylinder sealing end cover, the hydraulic cylinder piston rod is installed on the hydraulic cylinder body through an end cover fixing screw, and the hydraulic cylinder piston rod can move smoothly in the hydraulic cylinder sealing end cover.

The hydraulic cylinder block has a cylinder chamber and a cylinder chamber.

Between the cylinder cavity and the rodless cavity of the hydraulic cylinder, the flow direction of oil is controlled by a control valve.

The control valve is provided with a spring baffle, a control valve piston and three oil inlet/outlet ports which are respectively an air cylinder oil inlet/outlet port, a control valve oil inlet/outlet port and a hydraulic cylinder oil inlet/outlet port.

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 cylinder bottom energy storage type hydraulic cylinder;

FIG. 2 is a cross-sectional view of a cylinder bottom stored energy type hydraulic cylinder;

fig. 3 is a sectional view of a control valve in the cylinder bottom energy storage type hydraulic cylinder.

In the above drawings: 1. the hydraulic cylinder comprises a hydraulic cylinder body, 10 parts, an energy storage unit, 11 parts, a cylinder gas inlet/outlet, 12 parts, a cylinder piston, 13 parts, a control valve, 14 parts, a spring baffle plate, 15 parts, a control valve piston, 16 parts, a cylinder oil inlet/outlet, 17 parts, a control valve oil inlet/outlet, 18 parts, a hydraulic cylinder oil inlet/outlet, 20 parts, a hydraulic cylinder working unit, 21 parts, a hydraulic cylinder rodless cavity oil inlet/outlet, 22 parts, a piston fixing nut, 23 parts, a hydraulic cylinder piston, 24 parts, a buffer sleeve, 25 parts, a hydraulic cylinder rod cavity oil inlet/outlet, 26 parts, a hydraulic cylinder sealing end cover, 27 parts, an end cover fixing screw, 28 parts and a hydraulic cylinder.

Detailed Description

The invention will be described in detail with reference to the drawings and the detailed description.

The invention provides a cylinder bottom energy storage type hydraulic cylinder, and referring to fig. 1, the cylinder bottom energy storage type hydraulic cylinder is characterized in that: the hydraulic cylinder comprises an oil 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 gas inlet/outlet port 11, a cylinder piston 12, a control valve 13, a spring stopper 14, a control valve piston 15, a cylinder oil inlet/outlet port 16, a control valve oil inlet/outlet port 17, and a cylinder oil inlet/outlet port 18.

The hydraulic cylinder working unit 20 comprises a cylinder rodless cavity oil inlet/outlet 21, a piston fixing nut 22, a hydraulic cylinder piston 23, a buffer sleeve 24, a hydraulic cylinder rod cavity oil inlet/outlet 25, a hydraulic cylinder sealing end cover 26, an end cover fixing screw 27 and a piston rod 28.

A cylinder piston 12 is arranged in a cylinder cavity at the bottom of the hydraulic cylinder body 1, the cylinder piston 12 can move in the cylinder body, and a control valve 13 is arranged between the cylinder cavity and a rodless cavity of the hydraulic cylinder; in the cylinder cavity of the hydraulic cylinder body 1, a hydraulic cylinder piston 23 is arranged at one end of a hydraulic cylinder piston rod 28 through a piston fixing nut 22, and a buffer sleeve 24 is arranged between the hydraulic cylinder piston 23 and the hydraulic cylinder piston rod 28, wherein the hydraulic cylinder piston 23 can move smoothly in the hydraulic cylinder cavity; the other end rod part of the hydraulic cylinder piston rod 28 penetrates through a hydraulic cylinder sealing end cover 26, and is installed on the oil cylinder body 1 by using an end cover fixing screw 27, and the hydraulic cylinder piston rod 28 can move smoothly in the hydraulic cylinder sealing end cover 26.

The oil cylinder body 1 is provided with a cylinder cavity and a hydraulic cylinder cavity, oil flow direction control is achieved between the cylinder cavity and a rodless cavity of the hydraulic cylinder through a control valve 13, the control valve 13 is provided with a spring baffle plate 14, a control valve piston 15 and three oil inlet/outlet ports, and the three oil inlet/outlet ports are respectively an air cylinder oil inlet/outlet port 16, a control valve oil inlet/outlet port 17 and a hydraulic cylinder oil inlet/outlet port 18.

The specific working principle of the invention is as follows:

when the work is finished, when the piston rod 28 of the hydraulic cylinder retracts, the hydraulic cylinder piston 23 moves downwards in the hydraulic cylinder cavity to compress hydraulic oil in the rodless cavity, at the moment, hydraulic oil with certain pressure in the rodless cavity enters through the hydraulic cylinder oil inlet/outlet 18 on the control valve 13, so that the spring baffle plate 14 in the control valve is pushed to compress, the hydraulic oil with the pressure can enter the cylinder cavity at one end of the cylinder piston 12 from the cylinder oil inlet/outlet 16 to push the cylinder piston 12 to move in the cylinder cavity, meanwhile, gas in the cylinder cavity at the other end of the cylinder piston 12 is compressed, and after a certain amount of hydraulic oil is stored, the spring baffle plate 14 returns to close the inlet, so that the purpose of energy recovery is achieved.

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 13 to push the control valve piston 15 in the control valve 13 to move, so that the spring baffle plate 14 is compressed, at the moment, the compressed gas is released, the cylinder piston 12 is pushed, the oil enters the rodless cavity of the hydraulic cylinder from the hydraulic cylinder oil inlet/outlet 18 through the cylinder oil inlet/outlet 16, the auxiliary main oil circuit jointly pushes the hydraulic cylinder piston 23 to move, the hydraulic cylinder piston rod 28 extends outwards, and energy recycling is achieved.