CN-121993443-A - Two-stage double-cylinder synchronous hydraulic system with single-cylinder emergency function

CN121993443ACN 121993443 ACN121993443 ACN 121993443ACN-121993443-A

Abstract

The invention relates to a two-stage double-cylinder synchronous hydraulic system with a single-cylinder emergency function, which comprises a first-stage left-side oil cylinder, a first-stage right-side oil cylinder, a second-stage left-side oil cylinder and a second-stage right-side oil cylinder, wherein a rod cavity loop and a rodless cavity loop of each oil cylinder are respectively provided with a first stop valve group, the first stop valve groups are arranged at an inlet pipeline of the loop, the rod cavity and the rodless cavity of each oil cylinder are connected through a parallel oil circuit, and the parallel oil circuit is provided with a parallel oil circuit stop valve. According to the invention, the emergency function is started after the oil cylinder at any one stage and any side fails in the two-stage double-cylinder synchronous hydraulic system, the failed oil cylinder passively follows the opposite-side oil cylinder to retract, and the synchronous retraction action under the two-stage double-cylinder emergency function is realized.

Inventors

HUANG JUNXIONG
DONG PENGPENG
CHEN JIAHENG
Cui Jinmiao
CHENG YUHAO

Assignees

中国船舶集团有限公司第七一五研究所

Dates

Publication Date: 20260508
Application Date: 20260202

Claims (7)

1. The utility model provides a two-stage double-cylinder synchronous hydraulic system who possesses emergent function of single cylinder, includes first level left side hydro-cylinder (11), first level right side hydro-cylinder (28), second level left side hydro-cylinder (18) and second level right side hydro-cylinder (23), its characterized in that: A rod cavity loop and a rodless cavity loop of each oil cylinder are respectively provided with a first stop valve group, and the first stop valve groups are arranged at the inlet pipeline of the loop; the rod cavity and the rodless cavity of each oil cylinder are connected through a parallel oil circuit, and a parallel oil circuit stop valve is arranged on the parallel oil circuit; a one-way valve is further arranged on a loop of one cavity of the rod cavity or the rodless cavity of each oil cylinder, an inlet of the one-way valve is connected with an oil way where the parallel oil way stop valve is positioned, and an outlet of the one-way valve is led to an oil return pipeline; The system comprises a normal working mode and a single-cylinder emergency working mode, wherein in the normal working mode, all the parallel oil way stop valves are closed, all the first stop valve groups are opened or closed according to control signals, and in the single-cylinder emergency working mode, when any oil cylinder fails, all the corresponding first stop valve groups are closed, and the corresponding parallel oil way stop valves are opened.
2. The two-stage double-cylinder synchronous hydraulic system with the single-cylinder emergency function according to claim 1, wherein a balance valve is further arranged on a rod cavity loop and a rodless cavity loop of each oil cylinder, and the balance valve is positioned between the first stop valve group and a corresponding oil cylinder cavity.
3. The two-stage double-cylinder synchronous hydraulic system with the single-cylinder emergency function according to claim 2, wherein the first stop valve group comprises a first-stage left-side cylinder rodless cavity loop stop valve (1), a first-stage left-side cylinder rodless cavity loop stop valve (3), a first-stage right-side cylinder rodless cavity loop stop valve (2), a first-stage right-side cylinder rodless cavity loop stop valve (4), a second-stage left-side cylinder rodless cavity loop stop valve (7), a second-stage left-side cylinder rodless cavity loop stop valve (6), a second-stage right-side cylinder rodless cavity loop stop valve (8) and a second-stage right-side cylinder rodless cavity loop stop valve (5).
4. The two-stage double-cylinder synchronous hydraulic system with single-cylinder emergency function according to claim 3, wherein the parallel oil path stop valve comprises: A first parallel oil way stop valve (13) and a second parallel oil way stop valve (12) which are arranged between the rodless cavity and the rod cavity of the first-stage left-side oil cylinder; A third parallel oil way stop valve (20) and a fourth parallel oil way stop valve (17) which are arranged between the rodless cavity and the rod cavity of the second-stage left-side oil cylinder; a fifth parallel oil way stop valve (29) and a sixth parallel oil way stop valve (30) which are arranged between the rodless cavity and the rod cavity of the first-stage right-side oil cylinder; a seventh parallel oil way stop valve (24) and an eighth parallel oil way stop valve (21) which are arranged between the rodless cavity and the rod cavity of the second-stage right-side oil cylinder.
5. The two-stage double-cylinder synchronous hydraulic system with the single-cylinder emergency function according to claim 4, wherein the check valve comprises a first-stage left-side oil cylinder check valve (14), a second-stage left-side oil cylinder check valve (15), a first-stage right-side oil cylinder check valve (32) and a second-stage right-side oil cylinder check valve (31).
6. The two-stage double-cylinder synchronous hydraulic system with single-cylinder emergency function according to claim 2, wherein the balance valve comprises: The first-stage left-side oil cylinder rod cavity loop balance valve (9) and the first-stage left-side oil cylinder rod cavity loop balance valve (10) are arranged in the first-stage left-side oil cylinder rod cavity loop; the second-stage left-side oil cylinder rod cavity loop balance valve (16) and the second-stage left-side oil cylinder rod cavity loop balance valve (19) are arranged in the second-stage left-side oil cylinder rod cavity loop; the second-stage right-side oil cylinder rod cavity loop balancing valve (22) and the second-stage right-side oil cylinder rod cavity loop balancing valve (25) are arranged in the second-stage right-side oil cylinder rod cavity loop; the first-stage right-side oil cylinder rod cavity loop balance valve (27) and the first-stage right-side oil cylinder rod cavity loop balance valve (26) are arranged in the rod cavity loop of the first-stage right-side oil cylinder.
7. The two-stage double-cylinder synchronous hydraulic system with the single-cylinder emergency function according to claim 1, wherein in a single-cylinder emergency working mode, after a parallel oil way stop valve of a failure oil cylinder is opened, two cavities of the failure oil cylinder are communicated through a parallel oil way and are communicated with an oil return pipeline through the one-way valve, so that the failure oil cylinder can passively and synchronously act under the driving of a contralateral same-level oil cylinder which normally works.

Description

Two-stage double-cylinder synchronous hydraulic system with single-cylinder emergency function Technical Field The invention belongs to the technical field of hydraulic control, and particularly relates to a two-stage double-cylinder synchronous hydraulic system with a single-cylinder emergency function. Background The double-cylinder synchronous hydraulic system belongs to a cooperative action mechanism with an actuator as an oil cylinder, and is widely applied to the fields of marine equipment, special machinery, national defense machinery and the like. In some specific application occasions, in order to ensure the successful completion of the work tasks, more complex design requirements of redundant loops and emergency functions are put forward for the double-cylinder synchronous hydraulic system. If the oil cylinder at one stage and one side fails and cannot actively act, the failed oil cylinder is required to have an emergency function, so that the synchronous action of the double-cylinder hydraulic system is realized. When the failure cylinder enters the emergency function, the hydraulic circuit of the failure cylinder is required to be switched from a passive action preventing state to a passive action state, and the hydraulic circuit has the premise of the emergency function. When the failure oil cylinder is in an emergency function, the loop state of the failure oil cylinder is switched, and the passive oil cylinder and the opposite side oil cylinder synchronously act. Therefore, there is a need for a reliable hydraulic system that can quickly switch to an emergency mode when either one of the primary or secondary dual cylinder systems fails, so that the failed cylinder passively follows the opposite cylinder in a synchronous motion, and that can avoid hydraulic shock and cavitation. Disclosure of Invention The invention aims to solve the technical problems that a two-stage double-cylinder synchronous hydraulic system with a single-cylinder emergency function is provided, so that the technical problems that emergency synchronization cannot be realized after a certain oil cylinder in a multi-stage double-cylinder system fails, hydraulic impact and suction are easy to generate in a switching process in the prior art are solved. The technical scheme of the invention is that the two-stage double-cylinder synchronous hydraulic system with the single-cylinder emergency function comprises a first-stage left-side oil cylinder, a first-stage right-side oil cylinder, a second-stage left-side oil cylinder and a second-stage right-side oil cylinder, wherein a rod cavity loop and a rodless cavity loop of each oil cylinder are respectively provided with a first stop valve group, and the first stop valve groups are arranged at an inlet pipeline of the loop; the rod cavity and the rodless cavity of each oil cylinder are connected through a parallel oil circuit, and a parallel oil circuit stop valve is arranged on the parallel oil circuit; a one-way valve is further arranged on a loop of one cavity of the rod cavity or the rodless cavity of each oil cylinder, an inlet of the one-way valve is connected with an oil way where the parallel oil way stop valve is positioned, and an outlet of the one-way valve is led to an oil return pipeline; The system comprises a normal working mode and a single-cylinder emergency working mode, wherein in the normal working mode, all the parallel oil way stop valves are closed, all the first stop valve groups are opened or closed according to control signals, and in the single-cylinder emergency working mode, when any oil cylinder fails, all the corresponding first stop valve groups are closed, and the corresponding parallel oil way stop valves are opened. Preferably, a balance valve is further arranged on the rod cavity loop and the rodless cavity loop of each oil cylinder, and the balance valve is positioned between the first stop valve group and the corresponding oil cylinder cavity. Preferably, the first stop valve group comprises a first-stage left-side cylinder rodless cavity loop stop valve, a first-stage right-side cylinder rodless cavity loop stop valve, a second-stage left-side cylinder rodless cavity loop stop valve, a second-stage right-side cylinder rodless cavity loop stop valve and a second-stage right-side cylinder rodless cavity loop stop valve. Preferably, the parallel oil passage shutoff valve includes: the first parallel oil way stop valve and the second parallel oil way stop valve are arranged between the rodless cavity and the rod cavity of the first-stage left-side oil cylinder; The third parallel oil way stop valve and the fourth parallel oil way stop valve are arranged between the rodless cavity and the rod cavity of the second-stage left-side oil cylinder; a fifth parallel oil way stop valve and a sixth parallel oil way stop valve which are arranged between the rodless cavity and the rod cavity of the first-stage right-side oil cylinder; The seventh parallel o