WO2023082234A1

WO2023082234A1 - Hydraulic system

Info

Publication number: WO2023082234A1
Application number: PCT/CN2021/130542
Authority: WO
Inventors: 宋勇荣; 樊岩
Original assignee: 无锡市东舟船舶设备股份有限公司
Priority date: 2021-11-15
Filing date: 2021-11-15
Publication date: 2023-05-19
Also published as: CN114207295B; CN114207295A

Abstract

A hydraulic system, comprising an oil tank (15), a first control valve (1) and a second control valve (2). The first control valve (1) comprises a first oil input valve port (P1), a first oil return valve port (T1), a first output valve port (A1) and a second output valve port (B1), the first output valve port (A1) being in communication with a first cavity, and the second output valve port (B1) being in communication with a second cavity. The second control valve (2) comprises a second oil input valve port (P2), a second oil return valve port (T2), a first control valve port (B2) and a second control valve port (A2). The hydraulic system further comprises an oil input oil circuit (3), a sequence valve (4) and a first throttle valve (5). The hydraulic system ensures the stable pressure of oil entering a first control oil circuit or a second control oil circuit.

Description

Hydraulic system

technical field

The present application relates to the field of hydraulic technology, for example, to a hydraulic system.

Background technique

In the related art, there are mainly three types of hydraulic steering gears used on ships, namely swing-cylinder hydraulic steering gears, fork-type hydraulic steering gears and rotary vane-type hydraulic steering gears. When the pressure of the hydraulic system is at a predetermined value, the output torque of the swing cylinder type and fork type hydraulic steering gear will change with the rotation angle of the rudder blade, and the output torque of the rotary vane hydraulic steering gear will not change with the rotation angle of the rudder blade. The angle changes, and the steering gear output torque curve of the rotary vane hydraulic steering gear is a straight line. Therefore, the matching performance of the rotary vane hydraulic steering gear and the rudder is better than that of the swing cylinder and fork type hydraulic steering gear, and more and more rotary vane hydraulic steering gears are installed in each type of ship.

The actuator of the rotary vane hydraulic steering gear is equipped with moving vanes, stationary vanes and other components inside, and the cavity inside the actuator is divided into a high-pressure area and a low-pressure area. The sealing strips between the moving blade and the stationary blade are C-shaped sealing strips, and the two sides of the sealing strips are the first chamber and the second chamber. In order to ensure the sealing performance of the sealing strip when the steering gear is not rotating, to isolate the first cavity and the second cavity, the structure in the related art is to install elastic bodies such as springs in the sealing strip, and implement a pre-tightening force on the sealing strip. But there is certain defect in this scheme: the preload force of elastic body is difficult to calculate, and if the preload force is too large, then the sealing strip installation is difficult, the friction force in use increases, and the wear and tear of the sealing strip intensifies, shortening the service life of the steering gear , if the pre-tightening force is too small, the sealing performance of the sealing strip cannot be guaranteed.

Contents of the invention

The application provides a hydraulic system, which can ensure the sealing performance of the sealing strip on the basis of controlling the rotation of the actuator.

A hydraulic system, comprising: an oil tank; a first control valve, the first control valve includes a first oil inlet valve port, a first oil return valve port, a first output valve port and a second output valve port, the first An oil inlet valve port and the first oil return valve port communicate with the oil tank respectively, the first output valve port communicates with the first cavity, and the second output valve port communicates with the second cavity ; The second control valve, the second control valve includes a second oil inlet valve port, a second oil return valve port, a first control valve port and a second control valve port, the second oil inlet valve port and the The ports of the second oil return valve are respectively communicated with the oil tank; the second control valve is configured to make the hydraulic oil act on the first control valve port when the second oil inlet valve port communicates with the first control valve port. A control valve to connect the first oil inlet valve port with the second output valve port, and the first oil return valve port to communicate with the first output valve port; the second control valve is set to When the second oil inlet valve port communicates with the second control valve port, the hydraulic oil acts on the first control valve to connect the first oil inlet valve port to the first output valve port. port, and the first oil return valve port communicates with the second output valve port.

Description of drawings

Fig. 1 is a schematic structural diagram of a hydraulic system provided by an embodiment of the present application;

Fig. 2 is another structural schematic diagram of a hydraulic system provided by an embodiment of the present application.

In the picture:

1. The first control valve; 2. The second control valve; 3. The oil inlet circuit; 31. The first oil inlet branch; 32. The second oil inlet branch; 33. The third oil inlet branch;

4. Sequence valve; 41. The first oil outlet valve port; 42. The second oil outlet valve port; 43. The third oil inlet valve port;

5. The first throttle valve;

6. Hydraulic lock group; 61. The first hydraulic lock; 62. The second hydraulic lock;

7. The first relief valve; 8. The second relief valve; 9. The third relief valve; 10. The first pressure gauge; 11. The second pressure gauge; 12. The return oil circuit; 13. The first pressure Gauge switch; 14, the second pressure gauge switch; 15, fuel tank; 16, the first pressure measuring oil circuit; 17, the second pressure measuring oil circuit;

A1, the first output valve port; B1, the second output valve port; P1, the first oil inlet valve port; T1, the first oil return valve port;

A2, the second control valve port; B2, the first control valve port; P2, the second oil inlet valve port; T2, the second oil return valve port;

A3, the first control port; B3, the second control port; P3, the main oil inlet; T3, the main oil return port;

U1, the first upstream valve port; D1, the first downstream valve port;

U2, the second upstream valve port; D2, the second downstream valve port;

U3, the third upstream valve port; D3, the third downstream valve port.

Detailed ways

In the description of this application, it should be noted that unless otherwise specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediary, and it can be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in this application in specific situations.

In this application, unless otherwise expressly specified and limited, a first feature being "on" or "under" a second feature may include direct contact between the first and second features, and may also include the first and second features Not in direct contact but through another characteristic contact between them. Moreover, "above", "above" and "above" the first feature on the second feature include that the first feature is directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature. "Below", "beneath" and "under" the first feature to the second feature include that the first feature is directly below and obliquely below the second feature, or simply means that the first feature has a lower level than the second feature.

The actuator of the rotary vane hydraulic steering gear is equipped with moving vanes, stationary vanes and other components inside, and the cavity inside the actuator is divided into a high-pressure area and a low-pressure area. The sealing strips between the moving blade and the stationary blade are C-shaped sealing strips, and the two sides of the sealing strips are the first chamber and the second chamber. In order to ensure the sealing performance of the sealing strip when the steering gear is not rotating, to isolate the first chamber and the second chamber, the structure in the related art is to install elastic bodies such as springs in the sealing strip, and implement a pre-tightening force on the sealing strip. But there is certain defective in this scheme: the preload force of spring or elastic body is difficult to calculate, if preload force is too big then sealing strip is difficult to install, the frictional force in use increases, and the wearing and tearing of sealing strip aggravates, shortens the service life of steering gear. If the pre-tightening force is too small, the sealing performance of the sealing strip cannot be guaranteed. Therefore, the present embodiment provides a hydraulic system to solve the above problems.

The sealing strip of the actuator controlled by the hydraulic system in this embodiment has a pre-tightening cavity between the moving vane, and a first communicating oil passage and a second communicating oil passage are provided in the sealing strip. The two ends of the first communication oil passage communicate with the first chamber and the second chamber respectively, the first end of the second communication oil passage communicates with the first communication oil passage, and the second end of the second communication oil passage communicates with the preload chamber .

As shown in FIGS. 1 and 2 , the hydraulic system includes an oil tank 15 , a first control valve 1 and a second control valve 2 . The first control valve 1 includes the first oil inlet valve port P1, the first oil return valve port T1, the first output valve port A1 and the second output valve port B1, the first oil inlet valve port P1 and the first oil return valve port T1 communicates with the oil tank 15 respectively, the first output valve port A1 communicates with the first cavity, and the second output valve port B1 communicates with the second cavity. When the first control valve 1 is not affected by the second control valve 2, the first oil inlet valve port P1 communicates with the first output valve port A1 and the second output valve port B1 respectively. That is, the hydraulic oil enters the first control valve 1 from the first oil inlet valve port P1, and enters the first cavity from the first output valve port A1 through the first control communication port A3, and passes through the second control port B1 from the second output valve port. The communication port B3 enters the second chamber. Since there is no oil pressure difference between the first chamber and the second chamber at this time, the actuator is in the middle position without twisting. At the same time, the hydraulic oil enters the first and second communication oil passages in the sealing strip in sequence, and reaches the pre-tightening chamber, so that the sealing strip is subjected to the pre-tightening force, and the seal between the sealing strip and the moving blade is strengthened. Therefore, the sealing performance of the sealing strip is guaranteed when the subsequent moving blade rotates.

The second control valve 2 includes the second oil inlet valve port P2, the second oil return valve port T2, the first control valve port B2 and the second control valve port A2, the second oil inlet valve port P2 and the second oil return valve port T2 communicates with the fuel tank 15 respectively. In one embodiment, the first control valve 1 is a hydraulic reversing valve, and the second control valve 2 is a solenoid valve.

The solenoid valve is configured to control the hydraulic reversing valve, and when the right end of the solenoid valve is energized, the second oil inlet valve port P2 of the solenoid valve communicates with the first control valve port B2. The hydraulic oil flows from the first control valve port B2 through the first control oil circuit represented by the dotted line on the left in the figure, and enters the left end of the hydraulic reversing valve. The hydraulic oil pushes the spool in the hydraulic reversing valve to move, so that the first oil inlet valve port P1 of the hydraulic reversing valve communicates with the second output valve port B1, and the first oil return valve port T1 connects with the first output valve port A1. connected. That is to say, the hydraulic oil will enter the first chamber. Relatively speaking, the first chamber is the high-pressure area, and the second chamber is the low-pressure area. The oil pressure difference between the first chamber and the second chamber will push the actuator to rotate in a first direction, and the first direction is clockwise or counterclockwise.

At this time, the preload force in the preload chamber will increase with the increase of the oil pressure in the first chamber, so that the preload force in the preload chamber can meet the sealing requirements when the oil pressure in the high pressure area is relatively high.

When the left end of the solenoid valve is energized, the second oil inlet valve port P2 of the solenoid valve communicates with the second control valve port A2. The hydraulic oil flows from the second control valve port A2 through the second control oil circuit represented by the dotted line on the right side of the figure, and enters the right end of the hydraulic reversing valve. The hydraulic oil pushes the spool of the hydraulic reversing valve to move in the opposite direction, so that the first oil inlet valve port P1 of the hydraulic reversing valve communicates with the first output valve port A1, and the first oil return valve port T1 communicates with the second output valve port. Port B1 is connected. That is to say, the hydraulic oil will enter the second chamber. Relatively speaking, the second chamber is a high-pressure area at this time, and the first chamber is a low-pressure area. The oil pressure difference between the second chamber and the first chamber will push the actuator to rotate in the second direction, which is opposite to the first direction.

Similarly, at this time, the preload force in the preload chamber will increase with the increase of the oil pressure in the second chamber, so that the preload force in the preload chamber can meet the requirements when the oil pressure in the high pressure area is high. Sealing required. Therefore, the hydraulic system can ensure the sealing performance of the sealing strip on the basis of controlling the rotation of the actuator.

In order to ensure the stability of the oil pressure entering the first control oil circuit or the second control oil circuit, in one embodiment, the hydraulic system further includes an oil inlet circuit 3 , a sequence valve 4 and a first throttle valve 5 . Wherein, the first end of the oil inlet passage 3 communicates with the main oil inlet P3 , and the main oil inlet P3 communicates with the oil tank 15 . The second end of the oil inlet passage 3 is branched into a first oil inlet branch 31 , a second oil inlet branch 32 and a third oil inlet branch 33 .

Wherein, the end of the first oil inlet branch 31 communicates with the first oil inlet valve port P1, so that the hydraulic oil enters the hydraulic steering valve. The end of the second oil inlet branch 32 communicates with the second oil inlet valve port P2. The sequence valve 4 comprises a third oil inlet valve port 43, a first oil outlet valve port 41 and a second oil outlet valve port 42, and the end of the third oil inlet branch 33 communicates with the third oil inlet valve port 43, so that Hydraulic oil enters sequence valve 4. The first throttle valve 5 is arranged on the second oil inlet branch 32 , the first oil outlet valve port 41 communicates with the downstream of the first throttle valve 5 , and the second oil outlet valve port 42 communicates with the fuel tank 15 .

The hydraulic oil can enter the second oil inlet valve port P2 through the second oil inlet branch 32 and the first throttle valve 5 , or enter the second oil inlet valve port P2 through the sequence valve 4 at the same time. In one embodiment, when the oil pressure is lower than the set pressure of the sequence valve 4, the first oil outlet valve port 41 of the sequence valve 4 communicates with the third oil inlet valve port 43, and the hydraulic oil enters the second oil inlet valve port P2 . When the oil pressure is greater than the set pressure of the sequence valve 4 , the second oil outlet valve port 42 of the sequence valve 4 communicates with the third oil inlet valve port 43 , and the hydraulic oil entering the third oil inlet branch 33 returns to the oil tank 15 . The cooperative use of the first throttle valve 5 and the sequence valve 4 can ensure the stability of the oil pressure entering the first control oil circuit or the second control oil circuit through the solenoid valve to a certain extent.

In order to further control the oil pressure and oil intake of the first control oil circuit and the second control oil circuit, in one embodiment, a second throttle valve is arranged on the first control oil circuit, and a third throttling valve is arranged on the second control oil circuit. Throttle valve to ensure that the hydraulic reversing valve can work normally.

In one embodiment, the hydraulic system further includes a third relief valve 9, the third relief valve 9 includes a third upstream valve port U3 and a third downstream valve port D3, the third upstream valve port U3 and the first oil outlet The valve port 41 communicates, and the third downstream valve port D3 communicates with the oil tank 15 . That is, the third overflow valve 9 communicates with the second oil inlet branch 32, and the communication position is located downstream of the first throttle valve 5, that is, when the oil pressure in the second oil inlet branch 32 is still too high, it can pass through The third overflow valve 9 performs pressure relief to ensure the normal operation of the solenoid valve and the hydraulic reversing valve.

In an embodiment, the hydraulic system further includes a hydraulic lock group 6 , and the hydraulic lock group 6 includes a first hydraulic lock 61 and a second hydraulic lock 62 . Wherein, the first hydraulic lock 61 is set on the communication pipeline between the first output valve port A1 and the first control communication port A3, and the second hydraulic lock 62 is set on the second output valve On the communication pipeline between port B1 and the second control communication port B3, that is, the first hydraulic lock 61 is set on the communication pipeline between the first output valve port A1 and the first chamber, and the second hydraulic lock 62 is set On the communication pipeline between the second output valve port B1 and the second chamber. The setting of the hydraulic lock group 6 can ensure that the hydraulic reversing valve can be at positive load pressure even when the load of the actuator is overloaded. It is reflected in the working phenomenon of the steering gear: even if the load of the steering gear increases, the steering gear can still be stabilized at the set angle, which ensures the stability of the steering gear.

When the rudder is subjected to large external loads such as waves, ocean currents and other floating objects, the torque of the rudder exceeds the set output torque of the rotary vane steering gear, which will cause damage to the hydraulic system. In order to cope with the occurrence of the above situation, when the torque of the rudder exceeds the set output torque of the steering gear, it is necessary to unload the entire hydraulic system to prevent the entire hydraulic system from being overloaded, thereby protecting the hydraulic system. In one embodiment, the hydraulic system It also includes a first relief valve 7 and a second relief valve 8 . In one embodiment, the first relief valve 7 includes a first upstream valve port U1 and a first downstream valve port D1 , the first upstream valve port U1 communicates with the first cavity, and the first downstream valve port D1 communicates with the oil tank 15 . The second overflow valve 8 includes a second upstream valve port U2 and a second downstream valve port D2, the second upstream valve port U2 communicates with the second cavity, and the second downstream valve port D2 communicates with the oil tank 15.

In order to detect the oil pressure in the oil inlet passage 3 in real time, the hydraulic system also includes a first pressure gauge 10 and a first pressure measurement oil passage 16, the first end of the first pressure measurement oil passage 16 is connected to the oil inlet passage 3 , the second end of the first pressure measuring oil circuit 16 is connected to the first pressure gauge 10 . In an embodiment, the hydraulic system further includes a first pressure gauge switch 13 , and the first pressure gauge switch 13 is arranged on the first pressure measuring oil circuit 16 .

In one embodiment, the hydraulic system further includes an oil return circuit 12, the first end of the oil return circuit 12 communicates with the oil tank 15 through the total oil return port T3, and the second end of the oil return circuit 12 is bifurcated and respectively Connected to the first oil return valve port T1, the second oil return valve port T2, the first downstream valve port D1, the second downstream valve port D2, the third downstream valve port D3 and the second oil outlet valve port 42 to realize return Oil.

In order to detect the oil pressure in the oil return circuit 12 in real time, the hydraulic system also includes a second pressure gauge 11 and a second pressure measurement oil circuit 17, the first end of the second pressure measurement oil circuit 17 is connected to the oil return circuit 12 , the second end of the second pressure measuring oil circuit 17 is connected to the second pressure gauge 11 . In an embodiment, the hydraulic system further includes a second pressure gauge switch 14 , and the second pressure gauge switch 14 is arranged on the second pressure measuring oil circuit 17 .

When the second oil inlet valve port P2 of the second control valve 2 of the hydraulic system communicates with the first control valve port B2, the hydraulic oil can act on the first control valve 1, so that the first control valve 1 of the first control valve 1 The oil inlet valve port P1 communicates with the second output valve port B1, and the first oil return valve port T1 communicates with the first output valve port A1. That is, the hydraulic oil will enter the second cavity from the oil tank 15 through the first oil inlet valve port P1 and the second output valve port B1 in sequence, so that the oil pressure in the second cavity is higher than that in the first cavity. The oil pressure difference of the hydraulic oil can push the actuator to rotate in the first direction.

When the second control valve 2 is configured such that the second oil inlet valve port P2 communicates with the second control valve port A2, the hydraulic oil can act on the first control valve 1, so that in the first control valve 1, the first The oil inlet valve port P1 communicates with the first output valve port A1, and the first oil return valve port T1 communicates with the second output valve port B1. That is, the hydraulic oil will enter the first cavity from the oil tank 15 through the first oil inlet valve port P1 and the first output valve port A1 in sequence, so that the oil pressure in the first cavity is higher than the oil pressure in the second cavity. The oil pressure difference of the hydraulic oil can push the actuator to rotate in the second direction, and the second direction is opposite to the first direction.

Regardless of whether the oil pressure in the first chamber is greater than, less than or equal to the oil pressure in the second chamber, the hydraulic oil will always enter the pre-tightening chamber through the first communicating oil passage and the second communicating oil passage, so that the gap between the sealing strip and the moving blade Keep the pre-tight seal between. And the pre-tightening force in the pre-tightening chamber will be adjusted automatically with the adjustment of the oil pressure of the hydraulic oil in the first chamber and the second chamber, so that the pre-tightening force in the pre-tightening chamber can meet the requirements when the oil pressure in the high-pressure area is relatively high. sealing needs. Therefore, the hydraulic system can ensure the sealing performance of the sealing strip on the basis of controlling the rotation of the actuator.

Claims

A hydraulic system comprising:

fuel tank (15);

The first control valve (1), the first control valve (1) includes the first oil inlet valve port (P1), the first oil return valve port (T1), the first output valve port (A1) and the second output valve port The valve port (B1), the first oil inlet valve port (P1) and the first oil return valve port (T1) communicate with the oil tank (15) respectively, and the first output valve port (A1) communicates with the oil tank (15) The first chamber communicates, and the second output valve port (B1) communicates with the second chamber;

The second control valve (2), the second control valve (2) includes the second oil inlet valve port (P2), the second oil return valve port (T2), the first control valve port (B2) and the second control valve port The valve port (A2), the second oil inlet valve port (P2) and the second oil return valve port (T2) are respectively communicated with the oil tank (15);

The second control valve (2) is configured to make hydraulic oil act on the first control valve (1) when the second oil inlet valve port (P2) communicates with the first control valve port (B2). ), to connect the first oil inlet valve port (P1) with the second output valve port (B1), and the first oil return valve port (T1) with the first output valve port (A1) connected;

The second control valve (2) is also configured to make the hydraulic oil act on the first control valve when the second oil inlet valve port (P2) communicates with the second control valve port (A2). valve (1) to connect the first oil inlet valve port (P1) with the first output valve port (A1), and the first oil return valve port (T1) with the second output valve port (B1) connected.
The hydraulic system according to claim 1, wherein, comprising an oil inlet circuit (3), a sequence valve (4), and a first throttle valve (5), the first end of the oil inlet circuit (3) is connected to The oil tank (15) is connected, and the second end of the oil inlet passage (3) is bifurcated into a first oil inlet branch (31), a second oil inlet branch (32) and a third oil inlet branch (33), the first oil inlet branch (31) communicates with the first oil inlet valve port (P1), and the second oil inlet branch (32) communicates with the second oil inlet valve port ( P2) communication, the sequence valve (4) includes a third oil inlet valve port (43), a first oil outlet valve port (41) and a second oil outlet valve port (42), and the third oil inlet branch (33) communicates with the third oil inlet valve port (43), the first throttle valve (5) is set on the second oil inlet branch (32), and the first oil outlet valve port (41) communicates with the downstream of the first throttle valve (5), and the second oil outlet valve port (42) communicates with the oil tank (15).
The hydraulic system according to claim 1, further comprising a first control communication port (A3), a second control communication port (B3), a first hydraulic lock (61) and a second hydraulic lock (62), the first The hydraulic lock (61) is set on the communication pipeline between the first output valve port (A1) and the first control communication port (A3), and the second hydraulic lock (62) is set on the second On the communication pipeline between the output valve port (B1) and the second control communication port (B3).
The hydraulic system according to claim 2, further comprising a first relief valve (7), the first relief valve (7) comprising a first upstream valve port (U1) and a first downstream valve port (D1), The first upstream valve port (U1) communicates with the first cavity, and the first downstream valve port (D1) communicates with the oil tank (15).
The hydraulic system according to claim 4, further comprising a second relief valve (8), the second relief valve (8) comprising a second upstream valve port (U2) and a second downstream valve port (D2), The second upstream valve port (U2) communicates with the second cavity, and the second downstream valve port (D2) communicates with the oil tank (15).
The hydraulic system according to claim 5, further comprising a third relief valve (9), the third relief valve (9) comprising a third upstream valve port (U3) and a third downstream valve port (D3), The third upstream valve port (U3) communicates with the first oil outlet valve port (41), and the third downstream valve port (D3) communicates with the oil tank (15).
The hydraulic system according to claim 2, further comprising a first pressure gauge (10) and a first pressure measuring oil circuit (16), the first end of the first pressure measuring oil circuit (16) communicates with the inlet An oil circuit (3), the second end of the first pressure measurement oil circuit (16) is connected to the first pressure gauge (10).
The hydraulic system according to claim 6, further comprising an oil return circuit (12), the first end of the oil return circuit (12) communicates with the oil tank (15), and the oil return circuit (12 ) of the second end is bifurcated and communicated with the first oil return valve port (T1), the second oil return valve port (T2), the first downstream valve port (D1), the second The downstream valve port (D2), the third downstream valve port (D3) and the second oil outlet valve port (42).
The hydraulic system according to claim 8, further comprising a second pressure gauge (11) and a second pressure measuring oil circuit (17), the first end of the second pressure measuring oil circuit (17) communicates with the return An oil circuit (12), the second end of the second pressure measurement oil circuit (17) is connected to the second pressure gauge (11).
The hydraulic system according to claim 1, wherein the first control valve (1) is a hydraulic reversing valve, and the second control valve (2) is a solenoid valve.