CN215980216U - Electro-hydraulic servo system for controlling hydraulic cylinder by servo electric cylinder - Google Patents
Electro-hydraulic servo system for controlling hydraulic cylinder by servo electric cylinder Download PDFInfo
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- CN215980216U CN215980216U CN202121512410.6U CN202121512410U CN215980216U CN 215980216 U CN215980216 U CN 215980216U CN 202121512410 U CN202121512410 U CN 202121512410U CN 215980216 U CN215980216 U CN 215980216U
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Abstract
The utility model discloses an electro-hydraulic servo system for controlling a hydraulic cylinder by a servo electric cylinder, which comprises a lower oil cylinder, wherein the top of the lower oil cylinder is fixedly connected with an upper oil cylinder in a sealing manner, the top of the upper oil cylinder is fixedly connected with an electric servo cylinder, and the output end of the electric servo cylinder is provided with an electric servo cylinder piston rod penetrating into the upper oil cylinder. The utility model relates to the technical field of hydraulic pressure, in particular to an electro-hydraulic servo system for controlling a hydraulic cylinder by a servo electric cylinder.
Description
Technical Field
The utility model relates to the technical field of hydraulic pressure, in particular to an electro-hydraulic servo system for controlling a hydraulic cylinder by a servo electric cylinder.
Background
A hydraulic machine is a machine for transferring energy to carry out various processes, made according to the pascal principle, using a liquid as working medium. The hydraulic machine is generally composed of three parts of a machine (main machine), a power system and a hydraulic control system. Hydraulic machines are classified into valve hydraulic machines, engineering hydraulic machines, and hydraulic machines are machines for processing products such as metal, plastic, rubber, wood, powder and the like by using hydrostatic pressure. It is commonly used in pressing and press forming processes such as forging, stamping, cold extrusion, alignment, bending, flanging, sheet drawing, powder metallurgy, press fitting, and the like. The existing hydraulic machine can not perform accurate secondary pressure supply when in use.
SUMMERY OF THE UTILITY MODEL
Aiming at the defects of the prior art, the utility model provides an electro-hydraulic servo system for controlling a hydraulic cylinder by a servo electric cylinder, which solves the practical problems to be solved in the prior art.
In order to achieve the purpose, the utility model is realized by the following technical scheme: an electro-hydraulic servo system for controlling a hydraulic cylinder by a servo electric cylinder comprises a lower oil cylinder, wherein an oil cylinder piston is arranged in the lower oil cylinder, an oil cylinder piston rod penetrating through the bottom surface of the lower oil cylinder is mounted on the oil cylinder piston, an upper oil cylinder is fixedly connected to the top of the lower oil cylinder in a sealed mode, an electric servo cylinder is fixedly connected to the top of the upper oil cylinder, and an electric servo cylinder piston rod penetrating into the upper oil cylinder is arranged at the output end of the electric servo cylinder;
the hydraulic control oil cylinder is characterized by further comprising an oil port A and an oil port B, wherein the oil port A and the oil port B are respectively communicated with the upper oil cylinder and the lower oil cylinder through a pipeline A and a pipeline B, and a hydraulic control one-way valve is installed on the pipeline A.
Preferably, a limiting table fixedly connected with the lower oil cylinder is arranged at the joint of the upper oil cylinder and the lower oil cylinder.
Preferably, a safety valve is connected to the pipeline A through a pipeline C.
Advantageous effects
The utility model provides an electro-hydraulic servo system for controlling a hydraulic cylinder by a servo electric cylinder. The method has the following beneficial effects: this by electric hydraulic servo system of servo electronic jar control pneumatic cylinder, accurate quick propulsion through the electronic servo jar piston rod that adds realizes giving the pressure at the secondary after the first push down of hydro-cylinder piston rod, makes the accurate worker of hydro-cylinder piston rod advance.
Drawings
FIG. 1 is a schematic view of the structure of the present invention.
In the figure: 1. the hydraulic control system comprises an electric servo cylinder, 2, an electric servo cylinder piston rod, 3, an upper oil cylinder, 4, a limiting table, 5, an oil cylinder piston, 6, an oil cylinder piston rod, 7, a lower oil cylinder, 8, oil ports A and 9, oil ports B and 10, a hydraulic control one-way valve, 11 and a safety valve.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The following working principles, detailed connecting means thereof, and the following main descriptions of the working principles and processes are well known in the art, and will be referred to by those skilled in the art for the specific connection and operation sequence of the components in this application.
The utility model provides a technical scheme that:
as can be seen from fig. 1, the electro-hydraulic servo system for controlling the hydraulic cylinder by the servo electric cylinder in the present case comprises a lower cylinder 7, a cylinder piston 5 is arranged in the lower cylinder 7, a cylinder piston rod 6 penetrating through the bottom surface of the lower cylinder 7 is arranged on the cylinder piston 5, an upper cylinder 3 is fixedly connected to the top of the lower cylinder 7 in a sealing manner, a complete cylinder body is formed by the upper cylinder 3 and the lower cylinder 7, the top of the upper cylinder 3 is fixedly connected with an electric servo cylinder 1, and an electric servo cylinder piston rod 2 penetrating into the upper cylinder 3 is arranged at the output end of the electric servo cylinder 1;
in the specific implementation process, it is worth particularly pointing out that the hydraulic control oil cylinder further comprises an oil port A8 and an oil port B9, wherein the oil port A8 and the oil port B9 are respectively communicated with the upper oil cylinder 3 and the lower oil cylinder 7 through a pipeline A and a pipeline B, and the pipeline A is provided with a hydraulic control one-way valve 10;
in the specific implementation process, it is worth particularly pointing out that the hydraulic oil can freely control the extension and retraction of the cylinder piston rod 6 through the oil port A8 and the oil port B9. And accurate working is carried out by the propulsion of the electric servo cylinder piston rod 2.
A limiting table 4 fixedly connected with the lower oil cylinder 7 is arranged at the joint of the upper oil cylinder 3 and the lower oil cylinder 7;
in the specific implementation process, it is worth pointing out that the limiting table 4 is arranged to limit the upward position of the oil cylinder piston 5, and the limiting table 4 is arranged at the maximum distance position where the electric servo piston rod 2 moves downward, so that the electric servo piston rod 2 can be prevented from being touched when the electric servo cylinder 1 breaks down and the oil cylinder piston 5 continues to operate, and the hard touch between the electric servo piston rod and the oil cylinder piston can cause hardware damage.
The pipeline A is connected with a safety valve through a pipeline C.
From the above, the working principle of the device is as follows:
1) the oil port A8 enters high-pressure oil, the high-pressure oil enters the rodless cavity of the upper oil cylinder 3 through the hydraulic control one-way valve 10, the oil cylinder piston 5 and the oil cylinder piston rod 6 are pushed to move downwards, and the hydraulic oil in the rod cavity of the lower oil cylinder 7 returns to the oil tank through the oil port B9.
2) The precise working feed adopts two control modes, one is pressure control, and the other is displacement control
2.1) pressure control: after the piston rod 6 acts on a workpiece or a load, pressure is quickly built up on a rodless cavity of the hydraulic cylinder, and after a preset pressure is reached (through a pressure sensor), high-pressure oil is unloaded. At this time, the high-pressure hydraulic oil in the upper oil cylinder 3 is in a fully sealed state under the pressure maintenance of the pilot operated check valve 10. At this time, the electric servo cylinder 1 is started to slowly extend the piston rod 2 of the electric servo cylinder, and the pressure in the rodless cavity of the upper oil cylinder 3 is rapidly increased. The liquid pressure is as follows: the pressure transmission is achieved by adjusting the feeding amount of a piston rod of an electric servo cylinder through a servo motor
Example (c): assuming that the output force of the electric servo cylinder is set to 1 ton, according to S1: s2 ═ 1:
10 according to the formula, the hydraulic pressure is calculated as 1/S1 from the electric servo cylinder, and at this time, the output force acting on the piston is P2 as 1/S1 as S2 as 1 as 10 as S1/S1 as 10, so that the output force of the hydraulic cylinder can be calculated as 10 tons. Therefore, the high power is achieved with low power, and the effect of power amplification is achieved.
2.2) displacement control: after the piston rod 6 acts on a workpiece or load (by forming a switch, displacement sensor, etc.), the high pressure oil is unloaded. At the moment, the high-pressure hydraulic oil in the upper oil cylinder 3 is in a full-sealing state under the pressure maintenance of the hydraulic control one-way valve 10, and at the moment, the electric servo cylinder 1 is started, so that the electric servo cylinder piston rod 2 of the electric servo cylinder slowly extends out.
Example (c): assuming that the electric servo cylinder piston rod extends H1 and the hydraulic cylinder extends H2, according to the principle of fluid incompressible, S1 × H1 is S2 × H2, and because S1: s2 ═ 1: 10 then H1: h2 ═ 1:
10, if the piston rod of the electric servo cylinder extends by 10MM, the hydraulic cylinder extends by 1MM, the position output error of the hydraulic cylinder is reduced to 1/10 on the basis of the original error, and the accurate control for reducing the displacement error is realized.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "disposed," "connected," "secured," "screwed" and the like are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; the terms may be directly connected or indirectly connected through an intermediate, and may be communication between two elements or interaction relationship between two elements, unless otherwise specifically limited, and the specific meaning of the terms in the present invention will be understood by those skilled in the art according to specific situations.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.
Claims (3)
1. The utility model provides an electrohydraulic servo system by servo electric cylinder control pneumatic cylinder, includes lower hydro-cylinder (7), be provided with hydro-cylinder piston (5) in lower hydro-cylinder (7), install hydro-cylinder piston rod (6) that run through lower hydro-cylinder (7) bottom surface on hydro-cylinder piston (5), its characterized in that: the top of the lower oil cylinder (7) is fixedly connected with an upper oil cylinder (3) in a sealing mode, the top of the upper oil cylinder (3) is fixedly connected with an electric servo cylinder (1), and an electric servo cylinder piston rod (2) penetrating into the upper oil cylinder (3) is arranged at the output end of the electric servo cylinder (1);
the hydraulic control oil cylinder is characterized by further comprising an oil port A (8) and an oil port B (9), wherein the oil port A (8) and the oil port B (9) are communicated with the upper oil cylinder (3) and the lower oil cylinder (7) through a pipeline A and a pipeline B respectively, and a hydraulic control one-way valve (10) is installed on the pipeline A.
2. An electro-hydraulic servo system for controlling a hydraulic cylinder by a servo electric cylinder according to claim 1, characterized in that: and a limiting table (4) fixedly connected with the lower oil cylinder (7) is arranged at the joint of the upper oil cylinder (3) and the lower oil cylinder (7).
3. An electro-hydraulic servo system for controlling a hydraulic cylinder by a servo electric cylinder according to claim 1, characterized in that: the pipeline A is connected with a safety valve (11) through a pipeline C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121512410.6U CN215980216U (en) | 2021-07-05 | 2021-07-05 | Electro-hydraulic servo system for controlling hydraulic cylinder by servo electric cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121512410.6U CN215980216U (en) | 2021-07-05 | 2021-07-05 | Electro-hydraulic servo system for controlling hydraulic cylinder by servo electric cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215980216U true CN215980216U (en) | 2022-03-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121512410.6U Active CN215980216U (en) | 2021-07-05 | 2021-07-05 | Electro-hydraulic servo system for controlling hydraulic cylinder by servo electric cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215980216U (en) |
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2021
- 2021-07-05 CN CN202121512410.6U patent/CN215980216U/en active Active
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