CN115523203B - Rotary vane steering engine rudder oil cylinder fault isolation valve group and rotary vane steering engine - Google Patents

Abstract

The application relates to a rotary vane steering engine steering cylinder fault isolation valve bank and a rotary vane steering engine, and relates to the field of ship steering engine control, wherein the rotary vane steering engine steering cylinder fault isolation valve bank comprises a communication assembly and a liquid path isolation valve; the communication assembly comprises a two-way cartridge valve and a pilot reversing valve, wherein the two-way cartridge valve comprises a two-way valve control port, a two-way valve A oil port and a two-way valve B oil port; the two communicating components are provided with two pilot reversing valves respectively arranged between the working oil ports, the oil drainage ports and the two-way valve control ports of the two pump stations of the steering cylinder, and the two-way cartridge valves are respectively connected between the first working oil ports and the second working oil ports of the two pump stations; the hydraulic isolation valve is arranged between the working oil ports of the two pump stations, so that the on-off state between the corresponding working oil ports of the two pump stations can be controlled, and the hydraulic isolation valve has the advantages of small volume, low cost and high action sensitivity. The application also relates to a rotary vane steering engine.

Description

Rotary vane steering engine rudder oil cylinder fault isolation valve group and rotary vane steering engine

Technical Field

The application relates to the field of ship steering engine control, in particular to a fault isolation valve bank of a steering cylinder of a rotary vane steering engine.

Background

The ship steering engine is equipment which moves under the drive of hydraulic equipment to drive a ship rudder to rotate so as to control the sailing direction of a ship. In order to ensure the reliability of the operation of the steering engine, the steering engine is usually provided with two sets of mutually independent hydraulic cylinders and two sets of mutually independent hydraulic driving pump stations, and hydraulic oil output by the pump stations drives the steering engine to rotate under the control of a hydraulic control loop. The hydraulic isolation valve group is arranged between the two hydraulic cylinders and the two hydraulic drive pump stations, when a single fault occurs to the steering engine, the fault part can be timely isolated through the adjustment of the hydraulic isolation valve group, so that the steering engine can work by using one hydraulic cylinder, the steering capability of the ship can be recovered as soon as possible, and the sailing safety of the ship is guaranteed.

The ship steering engine is mainly divided into a plunger type steering engine and a rotary vane type steering engine, and the rotary vane type steering engine is widely applied due to the advantages of small volume and high efficiency. As shown in fig. 1, a conventional rudder cylinder isolation valve block of a rotary vane steering engine is shown, the rotary vane steering engine 3 comprises a housing 31 and a rotor 32, the rotor 32 is arranged in the housing 31, a cavity for containing hydraulic oil is formed between the housing 31 and the rotor 32, a fixed stop 33 fixed on the housing 31 and a rotary vane 34 fixed on the rotor 32 divide the cavity into four oil cavities, a first oil cavity 35 and a second oil cavity 36 form one set of working cylinders, and a third oil cavity 37 and a fourth oil cavity 38 form the other set of working cylinders. The first pump station first working oil port A1 is connected with the first oil cavity 35, the first pump station second working oil port B1 is connected with the second oil cavity 36, the second pump station first working port A2 is connected with the third oil cavity 37, the second pump station second working port B2 is connected with the fourth oil cavity, the first pump station first working port A1 is connected with the second pump station second working port B2 through the liquid path isolation valve 2, the first pump station second working port B1 is connected with the second pump station first working port A2 through the liquid path isolation valve 2, and a communication hydraulic reversing valve 4 and a safety valve 5 are arranged between the first pump station first working port A1 and the first pump station second working port B1 and between the second pump station first working port A2 and the second pump station second working port B2.

When any set of working oil cylinders fail and cannot be used, the hydraulic isolation valve 2 is controlled to act, the first working port A1 of the first pump station and the second working port B2 of the second pump station are cut off, the connection between the second working port B1 of the first pump station and the first working port A2 of the second pump station is cut off, meanwhile, the hydraulic reversing valve 4 is controlled to act, the first working port of the pump station on the failure side is communicated with the second working port, the pump station on the other side is used for driving the other set of working oil cylinders to work, and the work of the rotary vane steering engine is guaranteed. When the steering oil cylinder fails or the load is overlarge, and the pressure difference between the first working oil port and the second working oil port of any pump station is overlarge, the safety valve 5 is opened, so that the first working oil port is communicated with the second working oil port, the pressure of the working oil port is reduced, and the working safety of the hydraulic circuit is ensured.

Because the flow of the hydraulic oil for driving the steering engine to work is large, in order to ensure the reliable communication between the first working oil port and the second working oil port of the pump station, the valve port oil passage of the hydraulic communicating reversing valve 4 of the existing oil cylinder isolating valve group needs to be arranged large, so that the space occupation and the production cost of the hydraulic communicating reversing valve 4 are greatly increased, and the action sensitivity of the hydraulic communicating reversing valve 4 is reduced. In order to ensure reliable pressure relief of the first working oil port or the second working oil port of the pump station, the valve port oil duct of the safety valve 5 is also required to be arranged to be large, so that the volume and the production cost of the safety valve 5 are increased, and the action sensitivity of the safety valve 5 is reduced.

Disclosure of Invention

In order to reduce the volume of an oil cylinder isolation valve bank and improve the action sensitivity of the oil cylinder isolation valve bank, the application provides a rotary vane steering engine steering oil cylinder fault isolation valve bank and a rotary vane steering engine.

The application provides a fault isolation valve bank of a steering cylinder of a rotary vane steering engine, which adopts the following technical scheme:

a fault isolation valve group of a steering cylinder of a rotary vane steering engine comprises a communication assembly and a liquid path isolation valve; the two-way cartridge valve comprises two-way valve control ports, two-way valve A oil ports and two-way valve B oil ports, the two pilot reversing valves of the two communication assemblies are respectively arranged between first working oil ports, second working oil ports and oil drain ports of two pump stations of the steering cylinder and the two-way valve control ports, and the two-way valve A oil ports and the two-way valve B oil ports of the two-way cartridge valve are respectively connected with the first working oil ports and the second working oil ports of the two pump stations; the hydraulic isolation valve is arranged between the working oil ports of the two pump stations so as to control the on-off of the first working oil ports and the second working oil ports of the two pump stations.

By adopting the technical scheme, the large valve port area of the two-way cartridge valve can be utilized to form large communication flow between the first working oil port and the second working oil port, so that the reliable communication between the first working oil port and the second working oil port is ensured; compared with the traditional hydraulic communication reversing valve, the two-way cartridge valve has smaller volume and lower manufacturing cost under the condition of the same valve port area. The pilot reversing valve is utilized to control the two-way cartridge valve, and the control sensitivity of the two-way cartridge valve is effectively improved through a valve body structure with smaller volume; the hydraulic isolation valve arranged between the two communicating components is utilized to isolate a connecting passage between the working oil ports of the two pump stations when a single-side oil cylinder of the steering oil cylinder fails, and the communicating component on the failure side is utilized to control the first working oil port and the second working oil port of the pump station on the failure side to be communicated, so that the steering oil cylinder can be driven to work by utilizing the intact side oil cylinder, and the sailing safety of a ship is ensured.

In a specific implementation manner, the pilot reversing valve is a two-position four-way reversing valve, the pilot reversing valve comprises a valve oil inlet, a valve discharge port, a valve first oil outlet and a valve second oil outlet, the communication assembly further comprises a first one-way valve and a second one-way valve, inlets of the first one-way valve and the second one-way valve are respectively connected with the first working oil port and the second working oil port, outlets of the first one-way valve and the second one-way valve are mutually connected to form a one-way valve outlet connecting point, the one-way valve outlet connecting point is connected with the valve oil inlet, the valve discharge port is connected with the oil drain port, and the valve first oil outlet and/or the valve second oil outlet are connected with the two-way valve control port; the outlet connection points of the check valves of the two communication assemblies are mutually connected.

By adopting the technical scheme, the first one-way valve and the second one-way valve can be utilized to transmit larger pressure in the first working oil port and the second working oil port to the pilot reversing valve; the two-position four-way reversing valve can control the pressure of the control port of the two-way valve, so that the communication state between the oil port of the two-way valve A and the oil port of the two-way valve B of the two-way cartridge valve, namely the communication state between a first working oil port and a second working oil port connected with the two-way cartridge valve, is conveniently controlled.

In a specific embodiment, the valve first oil outlet is connected to the oil drain port and the valve second oil outlet is connected to the two-way valve control port.

By adopting the technical scheme, the pressure in the first working oil port or the second working oil port can be transmitted to the two-way valve control port under the condition that the pilot reversing valve is not electrified, the isolation between the first working oil port and the second working oil port is kept, and the heating and the energy consumption of the electromagnet of the pilot reversing valve are reduced; by means of connection of the first oil outlet and the oil drain port of the valve, leakage inside the pilot reversing valve can be reduced.

In a specific embodiment, the communication assembly further comprises a pilot relief valve and a first throttle valve, wherein the pilot relief valve is connected with the first throttle valve, a connection point between the pilot relief valve and the first throttle valve is connected with the two-way valve control port, the other end of the pilot relief valve is connected with the oil drain port, and the other end of the first throttle valve is connected with the valve oil inlet; one two-way valve A oil port of the communication assembly is connected with the first working oil port corresponding to the pump station, the two-way valve B oil port is connected with the second working oil port, the other two-way valve A oil port of the communication assembly is connected with the second working oil port corresponding to the pump station, and the two-way valve B oil port is connected with the first working oil port.

Through adopting above-mentioned technical scheme, utilize concatenating of guide overflow valve and first choke valve, when the pressure differential between first work hydraulic fluid port and second work hydraulic fluid port surpasses the setting value, guide overflow valve opens the overflow, produce the pressure differential at the both ends of first choke valve, this pressure differential is used between two-way valve A hydraulic fluid port and two-way valve B hydraulic fluid port and the two-way valve control mouth of the two-way cartridge valve of different communication subassembly, and more easily promote two-way cartridge valve through two-way valve A hydraulic fluid port and open, form the overflow of large-traffic volume between first work hydraulic fluid port and second work hydraulic fluid port, thereby form the effect of large-traffic relief valve, traditional large-traffic relief valve has been omitted, effectively reduced the volume of valves.

In a specific embodiment, the communication assembly further comprises a second throttle valve connected between the check valve outlet connection point and the valve oil inlet.

Through adopting above-mentioned technical scheme, utilize the second choke valve, can increase the pressure differential between two-way valve control mouth and two-way valve A hydraulic fluid port or the two-way valve B hydraulic fluid port when the pilot overflow valve is opened on the one hand, guaranteed the reliable opening of two-way cartridge valve, on the other hand can reduce the flow that first work hydraulic fluid port and second work hydraulic fluid port flow through first check valve and second check valve flow direction drain port when the pilot switching-over valve acts, reduce the energy loss of hydraulic oil.

In a specific embodiment, the communication assembly further includes a third throttle valve and a fourth throttle valve, wherein the third throttle valve and the fourth throttle valve are connected to each other and then connected between the pilot reversing valve and the two-way valve control port, and a connection point of the third throttle valve and the fourth throttle valve is connected between a connection point of the pilot overflow valve and the first throttle valve.

By adopting the technical scheme, the valve position switching of the pilot reversing valve and the impact of the opening and closing of the pilot overflow valve on the pressure of the control port of the two-way valve can be relieved by utilizing the third throttling valve and the fourth throttling valve, and the working stability of the two-way cartridge valve is ensured.

In a specific implementation manner, the two communicating assemblies are a first communicating assembly and a second communicating assembly respectively, the first working oil ports of the two pump stations are a first working oil port of the first pump station and a first working oil port of the second pump station respectively, and the second working oil ports of the two pump stations are a second working oil port of the first pump station and a second working oil port of the second pump station respectively; the oil port A of the two-way valve of the first communication assembly is connected with the first working oil port of the first pump station, and the oil port B of the two-way valve of the first communication assembly is connected with the second working oil port of the first pump station; the two-way valve A oil port of the second communication assembly is connected with the second working oil port of the second pump station, and the two-way valve B oil port of the second communication assembly is connected with the first working oil port of the second pump station.

By adopting the technical scheme, when the liquid path isolation valve is in a communication state, the first working oil port of the first pump station and the first working oil port of the second pump station are ensured to be connected to the two-way valve A oil port of the first communication assembly; the first pump station second working oil port and the second pump station second working oil port are connected to the two-way valve A oil port of the second communication assembly, the hydraulic oil of the two-way valve A oil port is utilized to push the two-way cartridge valve to open more easily, when the pressure of each pump station working oil port is increased, the two-way cartridge valve can be opened smoothly by utilizing the pressure difference smaller than the pressure of the two-way valve control port, and the pressure relief of the working oil port is realized.

In a specific implementation manner, the liquid path isolation valve is a two-position four-way reversing valve, when the liquid path isolation valve is located at a first valve position, the first working oil port of the first pump station is communicated with the first working oil port of the second pump station, the second working oil port of the first pump station is communicated with the second working oil port of the second pump station, and when the liquid path isolation valve is located at a second valve position, the first working oil port of the first pump station and the second working oil port of the first pump station and the first working oil port of the second pump station are cut off evenly.

By adopting the technical scheme, the two-position four-way reversing valve can more conveniently realize the communication and isolation of the two working oil ports of the first pump station and the two working oil ports of the second pump station, so that the independent oil supply of the first pump station or the second pump station and the combined oil supply of the first pump station and the second pump station can be realized under the normal working state of the steering cylinder; when the single side of the steering cylinder fails, the working oil ports of the two pump stations are isolated, the working of the pump station on the failed side is stopped, and the normal side pump station supplies oil to drive the steering cylinder to work, so that the safe sailing of the ship is ensured.

In a specific implementation manner, the hydraulic isolation valve is an electrohydraulic control two-position four-way reversing valve, and a control oil port of the hydraulic isolation valve is connected with working oil ports of the two pump stations.

Through adopting above-mentioned technical scheme, utilize electrohydraulic control two-position four-way reversing valve as the liquid way isolation valve, can be under the circumstances that the steering cylinder breaks down, control the work of the guide's solenoid valve in the liquid way isolation valve through the electrical control signal, utilize the hydraulic oil of control hydraulic fluid port to promote the action of liquid way isolation valve, cut off the liquid way isolation valve, keep apart the work hydraulic fluid port of two pump stations.

The rotary vane steering engine provided by the application adopts the fault isolation valve group of the rotary vane steering engine steering cylinder.

By adopting the technical scheme, the fault isolation valve bank of the steering cylinder of the rotary vane steering engine can realize the functions of fault isolation and safety valve of the steering cylinder with smaller valve bank volume and lower cost, and improves the sensitivity of valve bank switching.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the pilot reversing valve is matched with the two-way cartridge valve to replace the traditional communicated hydraulic reversing valve, and the characteristics of small volume and large flow of the two-way cartridge valve are utilized to effectively reduce the large space occupation and high manufacturing cost caused by the large-flow reversing valve;

2. the pilot overflow valve is matched with the two-way cartridge valve to replace the traditional safety valve, the volume and the through flow of the pilot overflow valve are small, the existing two-way cartridge valve is controlled by the pilot overflow valve, the effect of the high-flow and large-volume safety overflow valve is realized, and the volume of the fault isolation valve group of the steering cylinder of the rotary vane steering engine is further reduced;

3. the valve core volumes and the masses of the pilot reversing valve and the pilot overflow valve are smaller, so that the pilot reversing valve has smaller action sensitivity, the action sensitivity of the fault isolation valve group of the steering cylinder of the rotary vane steering engine is improved, the control precision of the valve group is improved, and the energy consumption of a control structure is reduced.

Drawings

Fig. 1 is a control schematic diagram of a fault isolation valve group of a conventional steering cylinder of a steering vane engine.

Fig. 2 is a control schematic diagram of an embodiment of a fault isolation valve set of a steering cylinder of a rotary vane steering engine.

Fig. 3 is a schematic diagram of a valve block structure of an embodiment of a fault isolation valve block of a steering cylinder of a rotary vane steering engine.

Reference numerals illustrate: 1. a communication assembly; 11. two-way cartridge valve; 111. a two-way valve control port; 112. an oil port of the two-way valve A; 113. an oil port of the two-way valve B; 12. a pilot reversing valve; 13. a first one-way valve; 14. a second one-way valve; 15. a pilot relief valve; 16. a first throttle valve; 17. a second throttle valve; 18. a third throttle valve; 19. a fourth throttle valve; 101. a first communication assembly; 102. a second communication assembly; 2. a liquid path isolation valve; 3. Steering cylinder; 31. a housing; 32. a rotor; 33. a fixed stop block; 34. rotating leaves; 35. a first oil chamber; 36. a second oil chamber; 37. a third oil chamber; 38. a fourth oil chamber; 4. a hydraulic reversing valve is communicated; 5. a safety valve; A. a valve first oil outlet; B. a valve second oil outlet; o, valve discharge port; p, a valve oil inlet; t, an oil drain port; a1, a first working oil port of a first pump station; b1, a second working oil port of the first pump station; a2, a first working oil port of the second pump station; b2, a second working oil port of the second pump station.

Detailed Description

The following describes specific embodiments of the present application in detail with reference to the drawings. It should be understood that the detailed description and specific examples, while indicating and illustrating the application, are not intended to limit the application.

In the description of the present application, it should be noted that, unless explicitly stated and limited otherwise, the terms "disposed" and "connected" should be interpreted broadly, and for example, they may be fixedly connected, detachably connected, or integrally connected; either directly or indirectly via an intermediate medium, or in communication with each other or in interaction with each other. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.

In this specification, the terms "first," "second," "third," "fourth," and the like are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or number of technical features indicated, such that features defining "first," "second," "third," "fourth," or the like may explicitly or implicitly include one or more of such features.

An embodiment of the fault isolation valve bank of the steering cylinder of the rotary vane steering engine, as shown in fig. 2 and 3, comprises a communication assembly 1 and a liquid path isolation valve 2.

The steering cylinder 3 of the rotary vane steering engine includes a housing 31 and a rotor 32, and the rotor 32 is mounted in the housing 31 and is rotatable in the housing 31. A fixed stopper 33 is provided on the inner wall of the housing 31, the fixed stopper 33 being generally fixed on opposite sides of the inner wall of the housing 31; the rotor 32 is provided with a rotary vane 34 on the outer side, the rotary vane 34 may be fixed to the rotor 32, or may be integrally formed with the rotor 32, and the rotary vane 34 is also provided at the opposite positions of both sides of the rotor 32. The clearance between the housing 31 and the rotor 32 is partitioned into a first oil chamber 35, a second oil chamber 36, a third oil chamber 37, and a fourth oil chamber 38, which are isolated from each other, by a fixed stopper 33 and a rotary vane 34. Wherein first oil chamber 35, second oil chamber 36, and rotary vane 34 located between first oil chamber 35 and second oil chamber 36 form one working cylinder, and third oil chamber 37, fourth oil chamber 38, and rotary vane 34 located between third oil chamber 37 and fourth oil chamber 38 form another working cylinder.

The steering cylinder 3 is supplied with oil by two pump stations, each pump station is provided with a first working oil port and a second working oil port, the two working oil ports of the two pump stations are respectively connected to a first oil cavity 35, a second oil cavity 36, a third oil cavity 37 and a fourth oil cavity 38 of the steering cylinder 3, and the rotary vane 34 is pushed to move by controlling the oil supply and the return of the working oil ports, so that the rotor 32 is pushed to rotate, and the rudder is driven to rotate by the rotation of the rotor 32. The connecting oil way is arranged between the working oil ports of the two pump stations, so that the working oil port of any one pump station can be connected to the four oil cavities of the steering cylinder 3, and the normal operation of the steering cylinder 3 can be driven by any one pump station, thereby ensuring the normal operation of the steering cylinder 3.

The hydraulic isolation valve 2 is arranged between the working oil ports of the two pump stations, and can cut off a connecting passage between the working oil ports of the two pump stations when a single-side fault occurs in the steering oil cylinder 3, such as a working oil cylinder formed by the first oil cavity 35 and the second oil cavity 36 or a working oil cylinder formed by the third oil cavity 37 and the fourth oil cavity 38 fails in sealing, stop the work of the pump station connected to the working oil cylinder on the fault side, directly connect the two oil cavities of the working oil cylinder on the fault side, work by one pump station connected to the working oil cylinder on the good side, and push the working oil cylinder on the good side to work. Therefore, when the working oil cylinder at one side of the steering oil cylinder 3 breaks down, the steering oil cylinder 3 can be ensured to work temporarily, and the steering oil cylinder 3 is prevented from stopping running due to the fault of the working oil cylinder at one side of the steering oil cylinder 3, so that the ship sails out of control. The hydraulic isolation valve 2 can use a hydraulic valve or a hydraulic valve group, such as a reversing valve, a switching valve, etc., which can simultaneously control the on-off of two oil paths.

The communication assembly 1 comprises a two-way cartridge valve 11 and a pilot reversing valve 12. The two-way cartridge valve 11 comprises a two-way cartridge valve cavity and a two-way cartridge valve core arranged in the valve cavity, the two-way cartridge valve 11 is provided with a two-way valve control port 111, a two-way valve A port 112 and a two-way valve B port 113 which are communicated with the two-way cartridge valve cavity, the two-way cartridge valve core can block an oil path between the two-way valve A port 112 and the two-way valve B port 113 under the pushing of pressure oil of the two-way valve control port 111, and when the pressure of the two-way valve control port 111 is relieved, the pressure oil from the two-way valve A port 112 or the two-way valve B port 113 can easily push the two-way cartridge valve core to move, so that the two-way valve A port 112 is communicated with the two-way valve B port 113.

The pilot reversing valve 12 is arranged on a control cover plate of the plug-in two-way valve, the pilot reversing valve 12 is arranged between a first working oil port, a second working oil port, an oil drain port T and a two-way valve control port 111 of the pump station, and when the pilot reversing valve 12 switches valve positions, the first plug-in control port 11 can be switched to be communicated with a working oil port with higher pressure in the first working oil port and the second working oil port or be communicated with the oil drain port T. The working oil port with higher pressure in the first working oil port and the second working oil port can be switched to be communicated with the two-way valve control port 111 through a hydraulic valve group, such as a one-way valve group or a shuttle valve; the first working oil port or the second working oil port can be switched to be communicated with the two-way valve control port 111 by a multi-position reversing valve position switching mode. When the first working oil port or the second working oil port is communicated with the two-way valve control port 111, the pressure of hydraulic oil in the two-way valve control port 111 is higher, and the two-way cartridge valve core is pushed to block an oil way between the two-way valve A oil port 112 and the two-way valve B oil port 113; when the two-way valve control port 111 is communicated with the oil drain port T, hydraulic oil in the two-way valve control port 111 is released, and the lower pressure in the two-way valve A port 112 or the two-way valve B port 113 can push the two-way cartridge valve core, so that the two-way valve A port 112 is communicated with the two-way valve B port 113.

The two communicating assemblies 1 are arranged between the first working oil ports and the second working oil ports of the two pump stations, wherein the two-way valve A oil port 112 and the two-way valve B oil port 113 of the two-way cartridge valve 11 are respectively connected with the first working oil ports and the second working oil ports of the corresponding pump stations. When one side working oil cylinder of the steering oil cylinder 3 breaks down, the hydraulic isolation valve acts to cut off the connection between the working oil ports of the two pump stations, the pump station connected with the broken working oil cylinder stops working, the pilot reversing valve in the communication assembly connected between the two working oil ports of the pump station is controlled to act, the two-way valve control port 111 of the corresponding two-way cartridge valve 11 is connected with the oil drain port T, so that the valve core of the two-way cartridge valve 11 can be pushed by small pressure in the two-way valve A oil port 112 or the two-way valve B oil port 113, and the first working oil port and the second working oil port of the pump station at the fault side are communicated, namely the two oil cavities of the broken working oil cylinder are communicated. Therefore, the pump station connected with the working cylinder on the side where the steering cylinder 3 does not have faults can work to drive the working cylinder on the side where the steering cylinder 3 does not have faults to work, so that the rotor 32 is pushed to rotate, the rudder is driven to temporarily work, and the ship navigation is prevented from being out of control. When the rotor 32 rotates, since the two oil chambers of the failed working cylinder are communicated, the hydraulic oil in the two oil chambers can freely flow, and thus the failed working cylinder can be prevented from becoming an obstacle to the operation of the working cylinder which has not failed.

In some embodiments of the fault isolation valve group of the steering cylinder of the rotary vane steering engine, as shown in fig. 2 and 3, the pilot reversing valve 12 is a two-position four-way reversing valve, specifically, four oil ports of the pilot reversing valve 12 are a valve oil inlet P, a valve discharge port O, a valve first oil outlet a and a valve second oil outlet B respectively; a first non-return valve 13 and a second non-return valve 14 are also provided in the communication assembly 1. The inlet of the first check valve 13 is connected with any one of the first working oil port and the second working oil port, the inlet of the second check valve 14 is connected with the other one of the first working oil port and the second working oil port, and the outlets of the first check valve 13 and the second check valve 14 are mutually connected to form a check valve outlet connection point, so that the pressure of the oil port with higher pressure in the first working oil port and the second working oil port can be transmitted to the check valve outlet connection point. The valve oil inlet P of the pilot reversing valve 12 is connected to the outlet connection point of the one-way valve, the valve discharge port O is connected to the oil drain port T, and at least one of the valve first oil outlet A and the valve second oil outlet B is connected with the two-way valve control port 111, so that the higher pressure in the first working oil port and the second working oil port can be transmitted to the two-way valve control port 111 through valve position switching of the pilot reversing valve 12; or the two-way valve control port 111 is connected to the drain port T, and the pressure of the two-way valve control port 111 is released. The check valve outlet connection points of the two communication assemblies 1 are connected with each other, so that the pressure of the check valve outlet connection points of the two communication assemblies 1 can be maintained to be the highest pressure in the first working oil port and the second working oil port of the two pump stations.

In a preferred embodiment of the present application, the pilot operated directional control valve 12 is a two-position four-way solenoid directional control valve, as shown in fig. 2 and 3. The first oil outlet A of the pilot reversing valve 12 is connected with the oil drain port T, the second oil outlet B of the pilot reversing valve 12 is connected with the two-way valve control port 111, when the pilot reversing valve 12 is not electrified and is in an initial valve position, the valve oil inlet P is communicated with the second oil outlet B of the valve, at the moment, higher pressures of the first working port and the second working port of the two pump stations are applied to the two-way valve control port 111 to push the valve core of the two-way cartridge valve 11 to act, the connection between the two-way valve A port 112 and the two-way valve B port 113 is cut off, hydraulic oil supplied by the working ports of the pump stations enters the working cylinder of the steering cylinder 3, and the steering cylinder 3 is pushed to work.

In some embodiments of the present application, as shown in fig. 2 and 3, a pilot relief valve 15 and a first throttle valve 16 are also provided in the communication assembly 1. One end of the first throttle valve 16 is connected with a one-way valve outlet connection point, namely a valve oil inlet P, the other end of the first throttle valve 16 is connected with a pilot overflow valve 15, and the other end of the pilot overflow valve 15 is connected with an oil drain port T, namely a valve discharge port O; the connection point of the first throttle valve 16 and the pilot relief valve 15 is connected to the two-way valve control port 111. In the two communicating assemblies 1, the two-way valve A oil port 112 of the two-way cartridge valve 11 in one communicating assembly 1 is connected with a first working oil port of a corresponding pump station, the two-way valve B oil port 113 is connected with a second working oil port of the pump station, the two-way valve A oil port 112 of the two-way cartridge valve 11 in the other communicating assembly 1 is connected with a second working oil port of the corresponding pump station, and the two-way valve B oil port 113 is connected with the first working oil port of the pump station.

When the pressure of either one of the first and second working ports of the two pump stations exceeds the relief pressure of the pilot relief valve 15, the pilot relief valve 15 opens, hydraulic oil flows from the working port with higher pressure to the drain port T through the corresponding check valve, the first throttle valve 16 and the pilot relief valve 15, and the flowing hydraulic oil generates a pressure difference between the front and rear of the first throttle valve 16, which is simultaneously applied between the two-way valve a port 112 or the two-way valve B port 113 (the port connected to the working port with higher pressure) of the two-way cartridge valve 11 and the two-way valve control port 111. The pressure is applied between the two-way valve B port 113 and the two-way valve control port 111 of the two-way cartridge valve 11 in one communication unit 1, and is necessarily applied between the two-way valve a port 112 and the two-way valve control port 111 of the two-way cartridge valve 11 in the other communication unit 1. The area of the hydraulic oil in the two-way valve a port 112 of the two-way cartridge valve 11 acting on the valve core is larger, so that the valve core is easier to move, and compared with the two-way valve B port 113, the hydraulic oil in the two-way valve a port 112 pushes the valve core of the two-way cartridge valve 11 to open at a lower pressure, and the hydraulic oil in the higher pressure working port of the first working port and the second working port of the pump station pushes the valve core of the two-way cartridge valve 11 to open through the two-way valve a port 112 connected with the hydraulic oil, so that the hydraulic oil flows from the higher pressure working port of the first working port and the second working port of the pump station to the lower pressure working port. Because the valve port flow area of the two-way cartridge valve 11 is larger, the larger drainage flow can enable the hydraulic oil pressure of the pump station working oil port to obviously drop, when the pressure drops to the overflow pressure of the pilot overflow valve 15, the pilot overflow valve 15 is closed, the pressure difference between the front and the rear of the first throttle valve 16 disappears, and the two-way cartridge valve 11 is closed. Therefore, the pressure of the first working oil port and the second working oil port of the pump station can be limited to the overflow pressure of the pilot overflow valve 15, and the safety of the valve group and the connecting oil way thereof is ensured.

In a preferred embodiment of the fault isolation valve set of the steering cylinder of the rotary vane steering engine, as shown in fig. 2 and 3, a second throttle valve 17 is further arranged in the communication assembly 1. The second throttle valve 17 is connected between the outlet connection point of the one-way valve and the valve oil inlet P of the pilot reversing valve 12, when the pilot reversing valve 12 acts and the valve oil inlet P is communicated with the oil drain port T, hydraulic oil flows through the second throttle valve 17 and the valve port of the pilot reversing valve 12 from the outlet connection point of the one-way valve, and when the hydraulic oil flows to the oil drain port T, a pressure difference is generated before and after the second throttle valve 17, so that the pressure of the valve oil inlet P, namely the pressure at the front end of the first throttle valve 16, is reduced, and the reliable reduction of the pressure of the two-way valve control port 111 is ensured. On the other hand, when the pilot relief valve 15 is opened, hydraulic oil overflows through the second throttle valve 17 and the first throttle valve 16 in sequence, and the pressure difference applied to the two-way cartridge valve 11 is larger, so that the two-way cartridge valve 11 is easier to open.

In some embodiments of the present application, as shown in fig. 2 and 3, a third throttle valve 18 and a fourth throttle valve 19 are further disposed in the communication assembly 1. One end of the third throttle valve 18 is connected to an oil outlet, such as a valve second oil outlet B, of the pilot switching valve 12 connected to the two-way valve control port 111, and the other end is connected to a connection point of the first throttle valve 16 and the pilot relief valve 15. The fourth throttle valve 19 has one end connected to the two-way valve control port 111 and the other end connected to the connection point of the first throttle valve 16 and the pilot relief valve 15, that is, to the third throttle valve 18. The third throttle valve 18 and the fourth throttle valve 19 can reduce the impact of the pressure change of the hydraulic oil on the two-way valve control port 111 when the valve position of the pilot reversing valve 12 is switched or the pilot overflow valve 15 is opened and closed, and ensure the reliable operation of the two-way cartridge valve 11.

As a specific implementation mode of the fault isolation valve bank of the steering cylinder of the steering engine, as shown in fig. 2 and 3, two pump stations for supplying oil to the steering cylinder are a first pump station and a second pump station, two working oil ports of the first pump station are a first working oil port A1 of the first pump station and a second working oil port B1 of the first pump station, and two working oil ports of the second pump station are a first working oil port A2 of the second pump station and a second working oil port B2 of the second pump station. The two communication assemblies 1 are a first communication assembly 101 and a second communication assembly 102 respectively, wherein an oil port 112 of a two-way valve A of a two-way cartridge valve 11 in the first communication assembly 101 is connected with a first working oil port A1 of a first pump station, and an oil port 113 of a two-way valve B is connected with a second working oil port B1 of the first pump station; the two-way valve A oil port 112 of the two-way cartridge valve 11 in the second communication assembly 102 is connected with the second working oil port B2 of the second pump station, and the two-way valve B oil port 113 is connected with the first working oil port A2 of the second pump station. Thus, when the pressure of the first working oil port A1 of the first pump station and the pressure of the first working oil port A2 of the second pump station are too high, so that the pilot overflow valve 15 is opened, hydraulic oil in the first working oil port A1 of the first pump station and the first working oil port A2 of the second pump station can easily push the two-way cartridge valve 11 in the first communication assembly 101 to be opened through the two-way valve a oil port 112, and when the pressure of the second working oil port B1 of the first pump station and the pressure of the second working oil port B2 of the second pump station are too high, hydraulic oil in the second working oil port B1 of the first pump station and the second working oil port B2 of the second pump station can easily push the two-way cartridge valve 11 in the second communication assembly 102 to be opened through the two-way valve a oil port 112, so that the limitation of the pressures of the working oil ports of the two pump stations is more reliable.

In some embodiments of the fault isolation valve bank of the steering cylinder of the steering vane steering engine, as shown in fig. 2 and 3, the liquid path isolation valve 2 is a two-position four-way reversing valve, and the liquid path isolation valve 2 is configured such that when the two-position four-way reversing valve is located at the first valve position, the first working oil port A1 of the first pump station is communicated with the first working oil port A2 of the second pump station, and the second working oil port B1 of the first pump station is communicated with the second working oil port B2 of the second pump station, at this time, whether the first pump station works alone, the second pump station works alone, or the first pump station and the second pump station work together, hydraulic oil can be simultaneously conveyed to two working cylinders of the steering cylinder 3, so that stable and reliable operation of the steering cylinder 3 is ensured. When the two-position four-way reversing valve is positioned at the second valve position, the first working oil port A1 of the first pump station, the first working oil port A2 of the second pump station and the second working oil port B2 of the second pump station are in a truncated state, and the second working oil port B1 of the first pump station, the first working oil port A2 of the second pump station and the second working oil port B2 of the second pump station are also in a cut-off state. Therefore, the corresponding working oil cylinder can be driven to work through the work of one pump station, the hydraulic oil in one working oil cylinder can not flow into the other working oil cylinder, and the isolation of the hydraulic oil output by the two pump stations and the isolation of the hydraulic oil in the two working oil cylinders are realized.

In a preferred embodiment of the fault isolation valve bank of the steering cylinder of the rotary vane steering engine, as shown in fig. 2 and 3, the hydraulic isolation valve 2 is an electrohydraulic control two-position four-way reversing valve, and a control oil port of the hydraulic isolation valve 2 is connected with working oil ports of two pump stations through a single valve bank or a shuttle valve bank, so that higher pressure in the working oil ports of the two pump stations is transferred to the control oil port of the hydraulic isolation valve 2. When the liquid path isolation valve 2 is not electrified, the two-position four-way reversing valve is positioned at an initial first valve position; when the liquid path isolation valve 2 is powered on, the pilot electromagnetic valve in the electrohydraulic control two-position four-way reversing valve acts, and the pressure of the control oil port of the liquid path isolation valve 2 is utilized to push the two-position four-way reversing valve to switch to the second valve position. The control of the electrohydraulic control two-position four-way reversing valve is more convenient, the valve position switching is more reliable, the power failure is in the setting of the first valve position, the liquid path isolating valve 2 has no power consumption and does not generate heat under the normal working state, the energy consumption of the liquid path isolating valve 2 is reduced, and the service life of the liquid path isolating valve 2 is prolonged.

The rotary vane steering engine uses the fault isolation valve bank of the rotary vane steering engine steering cylinder of any embodiment of the application, ensures the isolation of oil ways at two sides when the single side of the steering cylinder fails with smaller volume and lower cost, ensures that the rotary vane steering engine cannot stop due to the single side fault of the steering cylinder, can limit the working pressure of the valve bank, and ensures the safe working of the valve bank.

In the description of the present application, reference to the terms "one embodiment," "a particular embodiment," "a preferred embodiment," and the like, means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In the present application, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above embodiments are not intended to limit the scope of the present application, so: all equivalent changes in structure, shape and principle of the application should be covered in the scope of protection of the application.

Claims (9)

1. The utility model provides a change leaf steering engine steering cylinder trouble isolation valves which characterized in that: comprises a communication component (1) and a liquid path isolation valve (2); the communication assembly (1) comprises a two-way cartridge valve (11), a pilot reversing valve (12), a first one-way valve (13) and a second one-way valve (14), wherein the two-way cartridge valve (11) comprises a two-way valve control port (111), a two-way valve A oil port (112) and a two-way valve B oil port (113), the pilot reversing valve (12) is a two-position four-way reversing valve, and the pilot reversing valve (12) comprises a valve oil inlet (P), a valve discharge port (O), a valve first oil outlet (A) and a valve second oil outlet (B); the two communicating components (1) are provided with two inlets of a first one-way valve (13) and a second one-way valve (14) of the two communicating components (1) are respectively connected with a first working oil port and a second working oil port of two pump stations of a steering cylinder, outlets of the first one-way valve (13) and the second one-way valve (14) are mutually connected to form a one-way valve outlet connection point, the one-way valve outlet connection point is connected with the valve oil inlet (P), the valve discharge port (O) is connected with an oil drain port (T), the valve first oil outlet (A) and/or the valve second oil outlet (B) are connected with the two valve control ports (111), the two valve outlet connection points of the two communicating components (1) are mutually connected with the two first working oil ports and the two pump stations respectively; the liquid path isolation valve (2) is arranged between the working oil ports of the two pump stations so as to control the on-off of the first working oil ports and the second working oil ports of the two pump stations.

2. The rotary vane steering engine steering cylinder fault isolation valve set according to claim 1, wherein: the first oil outlet (A) of the valve is connected with the oil drain port (T), and the second oil outlet (B) of the valve is connected with the two-way valve control port (111).

3. The rotary vane steering engine steering cylinder fault isolation valve set according to claim 1, wherein: the communication assembly (1) further comprises a pilot overflow valve (15) and a first throttle valve (16), wherein the pilot overflow valve (15) is connected with the first throttle valve (16), a connecting point between the pilot overflow valve (15) and the first throttle valve is connected with the two-way valve control port (111), the other end of the pilot overflow valve (15) is connected with the oil drain port (T), and the other end of the first throttle valve (16) is connected with the valve oil inlet (P); one two-way valve A oil port (112) of the communication assembly (1) is connected with the first working oil port corresponding to the pump station, the two-way valve B oil port (113) is connected with the second working oil port, the two-way valve A oil port (112) of the other communication assembly (1) is connected with the second working oil port corresponding to the pump station, and the two-way valve B oil port (113) is connected with the first working oil port.

4. The rotary vane steering engine steering cylinder fault isolation valve set according to claim 3, wherein: the communication assembly (1) further comprises a second throttle valve (17), and the second throttle valve (17) is connected between the one-way valve outlet connection point and the valve oil inlet (P).

5. The rotary vane steering engine steering cylinder fault isolation valve set according to claim 3, wherein: the communication assembly (1) further comprises a third throttle valve (18) and a fourth throttle valve (19), the third throttle valve (18) and the fourth throttle valve (19) are connected with each other, then are connected between the pilot reversing valve (12) and the two-way valve control port (111), and the connection point of the third throttle valve (18) and the fourth throttle valve (19) is connected with the connection point of the pilot overflow valve (15) and the first throttle valve (16).

6. The rotary vane steering engine steering cylinder fault isolation valve set according to any one of claims 1-5, wherein: the two communicating assemblies (1) are respectively a first communicating assembly (101) and a second communicating assembly (102), the first working oil ports of the two pump stations are respectively a first working oil port (A1) of the first pump station and a first working oil port (A2) of the second pump station, and the second working oil ports of the two pump stations are respectively a second working oil port (B1) of the first pump station and a second working oil port (B2) of the second pump station; the two-way valve A oil port (112) of the first communication assembly (101) is connected with the first working oil port (A1) of the first pump station, and the two-way valve B oil port (113) of the first communication assembly (101) is connected with the second working oil port (B1) of the first pump station; the two-way valve A oil port (112) of the second communication assembly (102) is connected with the second working oil port (B2) of the second pump station, and the two-way valve B oil port (113) of the second communication assembly (102) is connected with the first working oil port (A2) of the second pump station.

7. The rotary vane steering engine steering cylinder fault isolation valve set of claim 6, wherein: the liquid way isolation valve (2) is a two-position four-way reversing valve, when the liquid way isolation valve (2) is located at a first valve position, a first working oil port (A1) of a first pump station is communicated with a first working oil port (A2) of a second pump station, a second working oil port (B1) of the first pump station is communicated with a second working oil port (B2) of the second pump station, and when the liquid way isolation valve (2) is located at a second valve position, the first working oil port (A1) of the first pump station and the second working oil port (B1) of the first pump station and the second working oil port (A2) of the second pump station are cut off evenly.

8. The rotary vane steering engine steering cylinder fault isolation valve set of claim 7, wherein: the hydraulic path isolation valve (2) is an electrohydraulic control two-position four-way reversing valve, and a control oil port of the hydraulic path isolation valve (2) is connected with two working oil ports of the pump stations.

9. The utility model provides a rotating vane steering engine which characterized in that: a fault isolation valve set comprising a steering cylinder of a rotary vane steering engine according to any one of claims 1-8.