CN110630571B - Centering control valve group - Google Patents
Centering control valve group Download PDFInfo
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- CN110630571B CN110630571B CN201910915155.0A CN201910915155A CN110630571B CN 110630571 B CN110630571 B CN 110630571B CN 201910915155 A CN201910915155 A CN 201910915155A CN 110630571 B CN110630571 B CN 110630571B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D5/00—Power-assisted or power-driven steering
- B62D5/06—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle
- B62D5/09—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle characterised by means for actuating valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
- F15B1/02—Installations or systems with accumulators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
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- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention discloses a centering control valve group, and belongs to the technical field of vehicle steering systems. The centering control valve group comprises: the energy accumulator is fixedly arranged on the energy accumulator interface and is communicated with the second oil duct and the third oil duct; the second electromagnetic directional valve is fixedly arranged on the second valve installing interface, an oil inlet of the second electromagnetic directional valve is communicated with the third oil duct, and an oil outlet of the second electromagnetic directional valve is communicated with the fourth oil duct; the third electromagnetic directional valve is fixedly arranged on the third valve installing port, an oil inlet of the third electromagnetic directional valve is communicated with the fifth oil duct, and an oil outlet of the third electromagnetic directional valve is communicated with the sixth oil duct. The centering control valve group can integrate the valves together, is convenient to install, arrange and operate, improves the assembly efficiency, reduces the cost and ensures the operation safety.
Description
Technical Field
The invention relates to the technical field of vehicle steering systems, in particular to a centering control valve bank.
Background
With the development of the automobile industry, the application range of multi-axis steering automobiles is more and more extensive. In order to improve the flexibility of the steering of the multi-axle automobile, a plurality of axles are urgently needed to participate in the steering. The existing multi-axle steering automobile has the following configurations:
a first front axle steering system and a double front axle steering system;
secondly, a multi-shaft non-grouping steering system;
and thirdly, a multi-axis grouping steering system.
The first steering configuration and the second steering configuration control the wheel rotation angle through a mechanical connecting rod, a hydraulic control valve block is not needed to participate, and the third steering configuration needs a plurality of valve blocks to act together to control the wheel rotation angle, so that the rear group of wheels need to be locked when the wheels of the third steering configuration do not steer.
In the prior art, for centering and locking of a multi-shaft group steering system, a plurality of valve blocks are generally distributed, and the valve blocks are connected with one another through pipe joints and hard pipes, so that much inconvenience is brought to the arrangement and maintenance of the steering system. Meanwhile, the installation of the valve blocks reduces the assembly efficiency, increases the nodes of the pipeline, increases the cost and also improves the leakage risk of the pipeline.
Disclosure of Invention
The invention provides a centering control valve group, which solves or partially solves the technical problem that in the prior art, centering locking of a multi-shaft grouping steering system is realized, and the problem that the arrangement and maintenance of the steering system are inconvenient due to the distributed arrangement of various valve blocks is solved.
In order to solve the above technical problem, the present invention provides a centering control valve set, comprising: the energy storage device comprises a valve body, an energy accumulator, a first electromagnetic reversing valve, a second electromagnetic reversing valve and a third electromagnetic reversing valve; the oil-feeding port, the oil-returning port, the energy accumulator port, the butt joint oil port, the first valve-mounting port, the second valve-mounting port and the third valve-mounting port are formed in the valve body, and the first oil duct, the second oil duct, the third oil duct, the fourth oil duct, the fifth oil duct and the sixth oil duct are formed in the valve body; the oil feeding port is communicated with a first valve installing port through a first oil duct, the first valve installing port is communicated with the energy accumulator port through a second oil duct, the energy accumulator port is communicated with a second valve installing port through a third oil duct, the second valve installing port is communicated with the butt oil port through a fourth oil duct, the butt oil port is communicated with a third valve installing port through a fifth oil duct, and the third valve installing port is communicated with the oil return port through a sixth oil duct; the first electromagnetic reversing valve is fixedly arranged on the first valve mounting interface, an oil inlet of the first electromagnetic reversing valve is communicated with the first oil duct, and a first oil outlet of the first electromagnetic reversing valve is communicated with the second oil duct; the energy accumulator is fixedly arranged on the energy accumulator interface and is communicated with the second oil duct and the third oil duct; the second electromagnetic directional valve is fixedly arranged on the second valve mounting interface, an oil inlet of the second electromagnetic directional valve is communicated with the third oil duct, and an oil outlet of the second electromagnetic directional valve is communicated with the fourth oil duct; the third electromagnetic directional valve is fixedly arranged on the third valve mounting interface, an oil inlet of the third electromagnetic directional valve is communicated with the fifth oil duct, and an oil outlet of the third electromagnetic directional valve is communicated with the sixth oil duct.
Furthermore, a seventh oil duct is formed in the valve body; and the second oil outlet of the first electromagnetic directional valve is communicated with the oil return interface through the seventh oil duct.
Furthermore, a fourth valve installing port is formed in the valve body; and a pressure reducing valve is fixedly arranged in the fourth valve installing port and is arranged in the second oil duct.
Furthermore, a fifth valve installing port, a sixth valve installing port and a seventh valve installing port are formed in the valve body; a first check valve is fixedly arranged in the fifth valve-installing port and is arranged in the second oil duct; a second check valve is fixedly arranged in the sixth valve-loading interface and is arranged in the third oil duct; and a third check valve is fixedly arranged in the seventh valve-loading interface and is arranged in the sixth oil duct.
Furthermore, an eighth valve installing port is formed in the valve body, and an eighth oil duct is formed in the valve body; the energy accumulator interface is communicated with the oil return interface through the eighth oil duct; and a fourth electromagnetic directional valve is fixedly arranged in the eighth valve installing port and is arranged in the eighth oil duct.
Furthermore, a first detection interface is arranged on the valve body and is arranged between the eighth valve mounting interface and the energy accumulator interface; and a pressure sensor is fixedly arranged in the first detection interface, and the detection end of the pressure sensor is arranged in the eighth oil duct.
Furthermore, a ninth valve installing port is formed in the valve body, and a ninth oil duct is formed in the valve body; the butt joint oil port is communicated with the oil return port through the ninth oil duct; and a first overflow valve is fixedly arranged in the ninth valve-installing interface and is arranged in the ninth oil duct.
Furthermore, a tenth valve installing port is formed in the valve body, and a tenth oil duct is formed in the valve body; the third valve-loading port is communicated with the oil delivery port through the tenth oil duct; and a flow control valve is fixedly arranged in the tenth valve installing port and is arranged in the tenth oil duct.
Furthermore, an eleventh valve installing port is formed in the valve body, and an eleventh oil duct is formed in the valve body; one end of the eleventh oil duct is communicated with the tenth oil duct, and the other end of the eleventh oil duct is communicated with the oil return interface; a second overflow valve is fixedly arranged in the eleventh valve-loading interface and is arranged in the eleventh oil duct
Furthermore, a second detection interface is arranged on the valve body and is arranged between the third valve loading interface and the oil port; and a pressure switch is fixedly arranged in the second detection interface, and the detection end of the pressure switch is arranged in the fifth oil duct.
One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:
because the valve body is provided with an oil feeding interface, an oil return interface, an energy accumulator interface, a butt joint oil port, a first valve installing interface, a second valve installing interface and a third valve installing interface, the valve body is internally provided with a first oil duct, a second oil duct, a third oil duct, a fourth oil duct, a fifth oil duct and a sixth oil duct, the oil feeding interface is communicated with the first valve installing interface through the first oil duct, the first valve installing interface is communicated with the energy accumulator interface through the second oil duct, the energy accumulator interface is communicated with the second valve installing interface through the third oil duct, the second valve installing interface is communicated with the butt joint oil port through the fourth oil duct, the butt joint oil port is communicated with the third valve installing interface through the fifth oil duct, the third valve installing interface is communicated with the oil return interface through the sixth oil duct, the connection of the valves through the oil ducts arranged in the valve body is avoided, the connection of the valve block and the valve block through the pipe joint and the hard pipe, the arrangement and maintenance of the steering system are convenient, because the first electromagnetic reversing valve is fixedly arranged on the first valve installing interface, the oil inlet of the first electromagnetic reversing valve is communicated with the first oil duct, the first oil outlet of the first electromagnetic reversing valve is communicated with the second oil duct, the first electromagnetic reversing valve is electrified, oil at the oil feeding interface is conveyed to the energy accumulator through the first oil duct, the first electromagnetic reversing valve, the second oil duct and the energy accumulator interface in sequence to supply liquid for the energy accumulator, at the moment, the second electromagnetic reversing valve is electrified and is in a closed state, because the energy accumulator is fixedly arranged on the energy accumulator interface, the energy accumulator is communicated with the second oil duct and the third oil duct, the second electromagnetic reversing valve is fixedly arranged on the second valve installing interface, the oil inlet of the second electromagnetic reversing valve is communicated with the third oil duct, and the oil outlet of the second electromagnetic reversing valve is communicated with the fourth oil duct, when centering is needed, the first electromagnetic reversing valve is powered off, no liquid is supplied to the energy accumulator, the second electromagnetic reversing valve is powered off, high-pressure oil in the energy accumulator is conveyed to the abutting oil port through the energy accumulator interface, the third oil duct, the second electromagnetic reversing valve and the fourth oil duct in sequence, the abutting oil port conveys the high-pressure oil to the left oil cavity and the right oil cavity of the centering cylinder, the centering cylinder is kept at a centering position, at the moment, the third electromagnetic reversing valve is powered off and is in a closed state, the abutting oil port is not communicated with the oil return interface, at the moment, the centering cylinder connected with the abutting oil port is in a pressure maintaining state (namely a centering state), the third electromagnetic reversing valve is fixedly arranged on the third valve mounting interface, the oil inlet of the third electromagnetic reversing valve is communicated with the fifth oil duct, the oil outlet of the third electromagnetic reversing valve is communicated with the sixth oil duct, after centering is completed, the third electromagnetic reversing valve is powered on and is in an open state, the fifth oil duct, the third electromagnetic directional valve, the sixth oil duct and the oil return interface are conveyed into the oil return box, so that the centering cylinder is in a pressure relief state (namely a centering release state), and the first electromagnetic directional valve, the second electromagnetic directional valve and the third electromagnetic directional valve are integrated together, so that the centering cylinder is convenient to install and arrange, is convenient to operate, improves the assembly efficiency, reduces the cost and ensures the operation safety.
Drawings
FIG. 1 is a schematic diagram of a centering control valve block according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of the centering control valve assembly in fig. 1.
Detailed Description
Referring to fig. 1-2, an embodiment of the present invention provides a centering control valve assembly, including: the energy storage valve comprises a valve body 1, an energy accumulator 2, a first electromagnetic directional valve 3, a second electromagnetic directional valve 4 and a third electromagnetic directional valve 5.
The oil valve comprises a valve body 1, an oil feeding port 1-1, an oil return port 1-2, an energy accumulator port 1-3, a butt joint oil port 1-4, a first valve installing port, a second valve installing port and a third valve installing port, wherein the valve body 1 is internally provided with a first oil duct 1-5, a second oil duct 1-6, a third oil duct 1-7, a fourth oil duct 1-8, a fifth oil duct 1-9 and a sixth oil duct 1-10.
The oil feeding port 1-1 is communicated with a first valve installing port through a first oil duct 1-5, the first valve installing port is communicated with an energy accumulator port 1-3 through a second oil duct 1-6, the energy accumulator port 1-3 is communicated with a second valve installing port through a third oil duct 1-7, the second valve installing port is communicated with a butt oil port 1-4 through a fourth oil duct 1-8, the butt oil port 1-4 is communicated with a third valve installing port through a fifth oil duct 1-9, and the third valve installing port is communicated with an oil return port 1-2 through a sixth oil duct 1-10.
The first electromagnetic directional valve 3 is fixedly arranged on the first valve installing interface, an oil inlet of the first electromagnetic directional valve 3 is communicated with the first oil duct 1-5, and a first oil outlet of the first electromagnetic directional valve 3 is communicated with the second oil duct 1-6.
The energy accumulator 2 is fixedly arranged on the energy accumulator interface 1-3, and the energy accumulator 2 is communicated with the second oil duct 1-6 and the third oil duct 1-7.
The second electromagnetic directional valve 4 is fixedly arranged on the second valve installing interface, an oil inlet of the second electromagnetic directional valve 4 is communicated with the third oil ducts 1-7, and an oil outlet of the second electromagnetic directional valve 4 is communicated with the fourth oil ducts 1-8.
The third electromagnetic directional valve 5 is fixedly arranged on the third valve installing port, an oil inlet of the third electromagnetic directional valve 5 is communicated with the fifth oil ducts 1-9, and an oil outlet of the third electromagnetic directional valve 5 is communicated with the sixth oil ducts 1-10.
In the specific embodiment of the application, as the valve body 1 is provided with the oil feeding port 1-1, the oil return port 1-2, the energy accumulator port 1-3, the butt joint oil port 1-4, the first valve installing port, the second valve installing port and the third valve installing port, the valve body 1 is internally provided with the first oil duct 1-5, the second oil duct 1-6, the third oil duct 1-7, the fourth oil duct 1-8, the fifth oil duct 1-9 and the sixth oil duct 1-10, the oil feeding port 1-1 is communicated with the first valve installing port through the first oil duct 1-5, the first valve installing port is communicated with the energy accumulator port 1-3 through the second oil duct 1-6, the energy accumulator port 1-3 is communicated with the second valve installing port through the third oil duct 1-7, the second valve installing port is communicated with the butt joint oil port 1-4 through the fourth oil duct 1-8, the butt oil port 1-4 is communicated with a third valve loading port through a fifth oil duct 1-9, the third valve loading port is communicated with an oil return port 1-2 through a sixth oil duct 1-10, so that the valves are connected through oil ducts formed in the valve body 1, the connection between the valve block and the valve block through a pipe joint and a hard pipe is avoided, and the arrangement and maintenance of the steering system are convenient, because the first electromagnetic reversing valve 3 is fixedly arranged on the first valve loading port, the oil inlet of the first electromagnetic reversing valve 3 is communicated with the first oil duct 1-5, the first oil outlet of the first electromagnetic reversing valve 3 is communicated with the second oil duct 1-6, so that the first electromagnetic reversing valve 3 is electrified, the oil liquid at the oil feeding port 1-1 is conveyed to the energy accumulator 2 through the first oil duct 1-5, the first electromagnetic reversing valve 3, the second oil duct 1-6 and the energy accumulator port 1-3 in sequence, the accumulator 2 is supplied with liquid, at the moment, the second electromagnetic directional valve 4 is powered on and is in a closed state, the accumulator 2 is fixedly arranged on an accumulator interface 1-3, the accumulator 2 is communicated with a second oil duct 1-6 and a third oil duct 1-7, the second electromagnetic directional valve 4 is fixedly arranged on a second valve mounting interface, an oil inlet of the second electromagnetic directional valve 4 is communicated with the third oil duct 1-7, an oil outlet of the second electromagnetic directional valve 4 is communicated with a fourth oil duct 1-8, therefore, when centering is needed, the first electromagnetic directional valve 3 is powered off, liquid is not supplied to the accumulator 2 any more, the second electromagnetic directional valve 4 is powered off, high-pressure oil in the accumulator 2 is conveyed to a butt oil port 1-4 through the accumulator interface 1-3, the third oil duct 1-7, the second electromagnetic directional valve 4 and the fourth oil duct 1-8 in sequence, the butt oil port 1-4 conveys high-pressure oil to a left oil cavity and a right oil cavity of the centering cylinder, the centering cylinder is kept at a centering position, at the time, the third electromagnetic directional valve 5 is powered off and is in a closed state, the butt oil port 1-4 is not communicated with the oil return interface 1-2, at the time, the centering cylinder connected with the butt oil port 1-4 is in a pressure maintaining state (namely a centering state), as the third electromagnetic directional valve 5 is fixedly arranged on the third valve mounting interface, an oil inlet of the third electromagnetic directional valve 5 is communicated with the fifth oil duct 1-9, an oil outlet of the third electromagnetic directional valve 5 is communicated with the sixth oil duct 1-10, after the centering is finished, the third electromagnetic directional valve 5 is powered on and is in an open state, the oil in the centering cylinder is conveyed to the oil return tank through the butt oil port 1-4, the fifth oil duct 1-9, the third electromagnetic directional valve 5, the sixth oil duct 1-10 and the oil return interface 1-2 in, the centering cylinder is in a pressure relief state (namely, a centering release state), the first electromagnetic directional valve 3, the second electromagnetic directional valve 4 and the third electromagnetic directional valve 5 are integrated, so that the centering cylinder is convenient to install and arrange and operate, the assembly efficiency is improved, the cost is reduced, and the operation safety is ensured.
Specifically, a seventh oil passage 1-11 is formed in the valve body 1. And a second oil outlet of the first electromagnetic directional valve 3 is communicated with an oil return interface 1-2 through a seventh oil duct 1-11.
When the first electromagnetic directional valve 3 is powered off, oil in the oil delivery interface 1-1 enters from the oil inlet of the first electromagnetic directional valve 3 and is then conveyed into the oil return tank through the second oil outlet of the first electromagnetic directional valve 3, the seventh oil duct 1-11 and the oil return interface 1-2.
Specifically, a fourth valve installing port is formed in the valve body 1, a pressure reducing valve 6 is fixedly arranged in the fourth valve installing port, and the pressure reducing valve 6 is arranged in the second oil ducts 1-6.
When the first electromagnetic directional valve 3 is electrified to supply liquid to the energy accumulator 2, under the electrified working condition, pressure oil enters the second oil duct 1-6 through the first oil outlet of the first electromagnetic directional valve 3, then enters the energy accumulator 2 through the pressure reducing valve 6 to charge the energy accumulator 2, the pressure is reduced to a set value under the action of the pressure reducing valve 6, and the energy accumulator 2 is prevented from being filled with too high pressure.
Specifically, a fifth valve installation port, a sixth valve installation port and a seventh valve installation port are formed in the valve body 1.
A first check valve 7 is fixedly arranged in the fifth valve-loading interface, the first check valve 7 is arranged in the second oil ducts 1-6, a second check valve 8 is fixedly arranged in the sixth valve-loading interface, the second check valve 8 is arranged in the third oil ducts 1-7, a third check valve 9 is fixedly arranged in the seventh valve-loading interface, and the third check valve 9 is arranged in the sixth oil ducts 1-10 to avoid oil backflow.
Specifically, an eighth valve installing port is formed in the valve body 1, and eighth oil ducts 1-12 are formed in the valve body.
The energy accumulator interface is communicated with the oil return interface 1-2 through an eighth oil duct.
A fourth electromagnetic directional valve 10 is fixedly arranged in the eighth valve installing port, and the fourth electromagnetic directional valve 10 is arranged in the eighth oil ducts 1 to 12.
Under the maintenance working condition of the centering oil way, the fourth electromagnetic directional valve 10 is electrified, the fourth electromagnetic directional valve 10 is opened, the energy accumulator 2 is communicated with the oil way of the oil return connector 1-2, high-pressure oil in the energy accumulator 2 is released, and potential safety hazards caused by the fact that the pressure in the energy accumulator cannot be released due to inconvenient operation of the installation position of the integrated centering control valve group in the maintenance stage of the centering oil way are avoided.
Specifically, a first detection interface is arranged on the valve body 1, and the first detection interface is arranged between the eighth valve mounting interface and the energy accumulator interface 1-3.
A pressure sensor 11 is fixedly arranged in the first detection interface, and a detection end of the pressure sensor 11 is arranged in the eighth oil passage 1-12.
The pressure sensor 11 is used for detecting the pressure of the energy accumulator 2 and sending a pressure signal to the controller, and when the pressure value of the energy accumulator 2 obtained by the controller is lower than a set value, the controller controls the first electromagnetic directional valve 3 to be electrified, so that oil is supplemented to the energy accumulator 2.
Specifically, a ninth valve installing port is formed in the valve body 1, and a ninth oil duct 1-13 is formed in the valve body 1.
The oil port 1-4 is communicated with the oil return port 1-2 through a ninth oil duct 1-13; a first overflow valve 12 is fixedly arranged in the ninth valving nipple, and the first overflow valve 12 is arranged in the ninth oil passage 1-13.
When the centering cylinder is ensured to be in a centering state through the first overflow valve 12, the pressure of the centering loop is not exceeded (namely, the pressure does not exceed a safety value set by the system) due to external load interference, and the energy accumulator 2 and the oil channel are protected.
Specifically, a tenth valve installing port is formed in the valve body 1, and a tenth oil duct 1-14 is formed in the valve body.
The third valve installing port is communicated with the oil feeding port 1-1 through a tenth oil duct 1-14; a flow control valve 13 is fixedly arranged in the tenth valving nipple, and the flow control valve 13 is arranged in the tenth oil passage 1-14.
The flow control valve 13 is communicated with the oil delivery port 1-1, pressure oil from the oil delivery port 1-1 is subjected to flow limitation through the flow control valve 13 and then communicated with the butt oil port 1-4 through the third electromagnetic directional valve 5, low-pressure oil acts on left and right oil cavities of the centering cylinder, left and right pistons inside the centering cylinder are pushed to a centering position, the oil quantity supplied by the energy accumulator 2 to the centering cylinder is reduced, the centering speed of the centering cylinder is higher, the centering pressure is higher, and the centering effect is guaranteed.
Specifically, an eleventh valve installing port is formed in the valve body 1, and an eleventh oil duct 1-15 is formed in the valve body 1.
One end of the eleventh oil duct 1-15 is communicated with the tenth oil duct 1-14, and the other end of the eleventh oil duct 1-15 is communicated with the oil return interface 1-2; a second overflow valve 14 is fixedly arranged in the eleventh valving joint, and the second overflow valve 14 is arranged in the eleventh oil passage 1-15.
When the pressure oil of the oil feeding interface 1-1 supplies oil to the oil butt-joint ports 1-4 through the flow control valve 13 and the third electromagnetic directional valve 5, redundant oil enters the second overflow valve 14 through the tenth oil duct 1-14 and is then conveyed to the oil return tank through the eleventh oil duct 1-15 and the oil return interface 1-2.
Specifically, a second detection interface is arranged on the valve body 1, and the second detection interface is arranged between the third valve loading interface and the butt joint oil port 1-4.
A pressure switch 15 is fixedly arranged in the second detection interface, and a detection end of the pressure switch 15 is arranged in the fifth oil duct 1-9. The pressure switch 15 is connected to the first electromagnetic directional valve 3 and can control the on/off of the first electromagnetic directional valve 3.
The pressure switch 15 is used for detecting the pressure of the energy accumulator 2, and when the detected pressure value of the energy accumulator 2 is lower than a set value, the first electromagnetic directional valve 3 is electrified, so that oil is supplemented to the energy accumulator 2. The process does not need the participation of a control system, so that the condition that the energy accumulator cannot supplement hydraulic oil after the control system fails to work, and a centering loop cannot be centered reliably, thereby causing safe driving accidents can be avoided. The pressure switch 15 automatically enables the first electromagnetic directional valve 3 to be electrified, and the safety design is achieved, so that the safety of the system is improved.
Wherein, each valve installing port is internally provided with a thread, the outer wall of the valve body of each valve is also provided with a thread, and each valve is in threaded connection with the corresponding valve installing port.
To more clearly describe the embodiments of the present invention, the following description is provided in terms of the methods of using the embodiments of the present invention.
The oil supply interface 1-1 is communicated with an oil inlet of the first electromagnetic directional valve 3 through a first oil duct 1-5, and under the power-off working condition of the first electromagnetic directional valve 3, hydraulic oil from the oil supply interface 1-1 is conveyed to an oil return tank through a second oil outlet of the first electromagnetic directional valve 3, a seventh oil duct 1-11 and an oil return interface 1-2.
Under the working condition that the first electromagnetic reversing valve 3 is electrified, the internal oil way of the first electromagnetic reversing valve 3 is switched, the first oil outlet of the pressure oil of the first electromagnetic reversing valve 3 enters the second oil way 1-6, then enters the energy accumulator 2 through the pressure reducing valve 6, the first one-way valve 7 and the energy accumulator interface 1-3, the energy accumulator 2 is filled with liquid, the pressure is reduced to a set value under the action of the pressure reducing valve 6, and the situation that the filling pressure of the energy accumulator is too high is avoided. At this time, the second electromagnetic directional valve 4 is energized and is in a closed state.
The first electromagnetic directional valve 3 is powered off, no liquid is supplied to the energy accumulator 2 any longer, the second electromagnetic directional valve 4 is powered off, the second electromagnetic directional valve is in an open state, the energy accumulator 2 is communicated with an oil inlet of the second electromagnetic directional valve 4 through a third oil duct 1-7, an oil outlet of the second electromagnetic directional valve 4 is communicated with a butt oil port 1-4 through a fourth oil duct 1-8, hydraulic oil in the energy accumulator 2 sequentially enters the third oil duct 1-7 and then sequentially enters left and right oil cavities in the centering cylinder through the second check valve 8, the second electromagnetic directional valve 4, the fourth oil duct 1-8 and the butt oil port 1-4, and the centering cylinder is kept at a centering position. At the moment, the oil butt joint ports 1-4 convey high-pressure oil to left and right oil cavities of the centering cylinder, and the centering cylinder is kept in a centering position. At the moment, the third electromagnetic directional valve 5 is powered off and is in a closed state, the oil port 1-4 is not communicated with the oil return port 1-2, and the centering cylinder connected with the oil port 1-4 is in a pressure maintaining state (namely, a centering state).
When the centering is completed, the second electromagnetic directional valve 4 is electrified and is in a closed state, the third electromagnetic directional valve 5 is electrified and is in an open state, oil in the centering cylinder is conveyed to the oil return tank sequentially through the oil port 1-4, the fifth oil duct 1-9, the third electromagnetic directional valve 5, the third one-way valve 9, the sixth oil duct 1-10 and the oil return port 1-2, so that the centering cylinder is in a pressure relief state (namely, a centering release state), and the first electromagnetic directional valve 3, the second electromagnetic directional valve 4 and the third electromagnetic directional valve 5 are integrated together, so that the centering cylinder is convenient to install and arrange and convenient to operate, the assembly efficiency is improved, the cost is reduced, and the operation safety is ensured.
Under the maintenance working condition of the centering oil way, the fourth electromagnetic directional valve 10 is electrified, the fourth electromagnetic directional valve 10 is opened, the energy accumulator 2 is communicated with the oil way of the oil return connector 1-2, high-pressure oil in the energy accumulator 2 is released, and potential safety hazards caused by the fact that the pressure in the energy accumulator cannot be released due to inconvenient operation of the installation position of the integrated centering control valve group in the maintenance stage of the centering oil way are avoided.
The pressure sensor 11 is used for detecting the pressure of the energy accumulator 2 and sending a pressure signal to the controller, and when the pressure value of the energy accumulator 2 obtained by the controller is lower than a set value, the controller controls the first electromagnetic directional valve 3 to be electrified, so that oil is supplemented to the energy accumulator 2.
When the centering cylinder is ensured to be in a centering state through the first overflow valve 12, the pressure of the centering loop is not exceeded (namely, the pressure does not exceed a safety value set by the system) due to external load interference, and the energy accumulator 2 and the oil channel are protected.
The flow control valve 13 is communicated with the oil delivery port 1-1, pressure oil from the oil delivery port 1-1 is subjected to flow limitation through the flow control valve 13 and then communicated with the butt oil port 1-4 through the third electromagnetic directional valve 5, low-pressure oil acts on left and right oil cavities of the centering cylinder, left and right pistons inside the centering cylinder are pushed to a centering position, the oil quantity supplied by the energy accumulator 2 to the centering cylinder is reduced, the centering speed of the centering cylinder is higher, the centering pressure is higher, and the centering effect is guaranteed.
When the pressure oil of the oil feeding interface 1-1 supplies oil to the oil butt-joint ports 1-4 through the flow control valve 13 and the third electromagnetic directional valve 5, redundant oil enters the second overflow valve 14 through the tenth oil duct 1-14 and is then conveyed to the oil return tank through the eleventh oil duct 1-15 and the oil return interface 1-2.
The pressure switch 15 is used for detecting the pressure of the energy accumulator 2, and when the detected pressure value of the energy accumulator 2 is lower than a set value, the first electromagnetic directional valve 3 is electrified, so that oil is supplemented to the energy accumulator 2. The process does not need the participation of a control system, so that the condition that the energy accumulator cannot supplement hydraulic oil after the control system fails to work, and a centering loop cannot be centered reliably, thereby causing safe driving accidents can be avoided. The pressure switch 15 automatically enables the first electromagnetic directional valve 3 to be electrified, and the safety design is achieved, so that the safety of the system is improved.
In the application, a first electromagnetic directional valve 3, a second electromagnetic directional valve 4, a third electromagnetic directional valve 5, a pressure reducing valve 6, a first one-way valve 7, a second one-way valve 8, a third one-way valve 9, a fourth electromagnetic directional valve 10, a first overflow valve 12, a flow control valve 13 and a second overflow valve 14 are integrated on a valve body 1, so that the space is saved, the installation is convenient, meanwhile, a first oil duct 1-5, a second oil duct 1-6, a third oil duct 1-7, a fourth oil duct 1-8, a fifth oil duct 1-9, a sixth oil duct 1-10, a seventh oil duct 1-11, an eighth oil duct 1-12, a ninth oil duct 1-13, a tenth oil duct 1-14 and an eleventh oil duct 1-15 are arranged in the valve body 1, so that the connection between a valve block and the valve block through a pipe joint and a hard pipe is avoided, and the inconvenience is brought to the arrangement and maintenance of a steering system, meanwhile, the assembly efficiency is improved, the nodes of the pipeline are reduced, the cost is reduced, and the leakage risk of the pipeline is also reduced.
Finally, it should be noted that the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to examples, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.
Claims (10)
1. A centering control valve pack, comprising: the energy storage device comprises a valve body, an energy accumulator, a first electromagnetic reversing valve, a second electromagnetic reversing valve and a third electromagnetic reversing valve;
the oil-feeding port, the oil-returning port, the energy accumulator port, the butt joint oil port, the first valve-mounting port, the second valve-mounting port and the third valve-mounting port are formed in the valve body, and the first oil duct, the second oil duct, the third oil duct, the fourth oil duct, the fifth oil duct and the sixth oil duct are formed in the valve body;
the oil feeding port is communicated with a first valve installing port through a first oil duct, the first valve installing port is communicated with the energy accumulator port through a second oil duct, the energy accumulator port is communicated with a second valve installing port through a third oil duct, the second valve installing port is communicated with the butt oil port through a fourth oil duct, the butt oil port is communicated with a third valve installing port through a fifth oil duct, and the third valve installing port is communicated with the oil return port through a sixth oil duct;
the first electromagnetic reversing valve is fixedly arranged on the first valve mounting interface, an oil inlet of the first electromagnetic reversing valve is communicated with the first oil duct, and a first oil outlet of the first electromagnetic reversing valve is communicated with the second oil duct;
the energy accumulator is fixedly arranged on the energy accumulator interface and is communicated with the second oil duct and the third oil duct;
the second electromagnetic directional valve is fixedly arranged on the second valve mounting interface, an oil inlet of the second electromagnetic directional valve is communicated with the third oil duct, and an oil outlet of the second electromagnetic directional valve is communicated with the fourth oil duct;
the third electromagnetic directional valve is fixedly arranged on the third valve mounting interface, an oil inlet of the third electromagnetic directional valve is communicated with the fifth oil duct, and an oil outlet of the third electromagnetic directional valve is communicated with the sixth oil duct.
2. The centering control valve pack of claim 1, wherein:
a seventh oil duct is formed in the valve body;
and the second oil outlet of the first electromagnetic directional valve is communicated with the oil return interface through the seventh oil duct.
3. The centering control valve pack of claim 1, wherein:
the valve body is provided with a fourth valve installing interface;
and a pressure reducing valve is fixedly arranged in the fourth valve installing port and is arranged in the second oil duct.
4. The centering control valve pack of claim 1, wherein:
the valve body is provided with a fifth valve installing port, a sixth valve installing port and a seventh valve installing port;
a first check valve is fixedly arranged in the fifth valve-installing port and is arranged in the second oil duct;
a second check valve is fixedly arranged in the sixth valve-loading interface and is arranged in the third oil duct;
and a third check valve is fixedly arranged in the seventh valve-loading interface and is arranged in the sixth oil duct.
5. The centering control valve pack of claim 1, wherein:
the valve body is provided with an eighth valve installing port, and an eighth oil duct is formed in the valve body;
the energy accumulator interface is communicated with the oil return interface through the eighth oil duct;
and a fourth electromagnetic directional valve is fixedly arranged in the eighth valve installing port and is arranged in the eighth oil duct.
6. The centering control valve pack of claim 5, wherein:
the valve body is provided with a first detection interface, and the first detection interface is arranged between the eighth valve mounting interface and the energy accumulator interface;
and a pressure sensor is fixedly arranged in the first detection interface, and the detection end of the pressure sensor is arranged in the eighth oil duct.
7. The centering control valve pack of claim 1, wherein:
a ninth valve installing port is formed in the valve body, and a ninth oil duct is formed in the valve body;
the butt joint oil port is communicated with the oil return port through the ninth oil duct;
and a first overflow valve is fixedly arranged in the ninth valve-installing interface and is arranged in the ninth oil duct.
8. The centering control valve pack of claim 1, wherein:
a tenth valve installing port is formed in the valve body, and a tenth oil duct is formed in the valve body;
the third valve-loading port is communicated with the oil delivery port through the tenth oil duct;
and a flow control valve is fixedly arranged in the tenth valve installing port and is arranged in the tenth oil duct.
9. The centering control valve pack of claim 8, wherein:
the valve body is provided with an eleventh valve installing port, and an eleventh oil duct is formed in the valve body;
one end of the eleventh oil duct is communicated with the tenth oil duct, and the other end of the eleventh oil duct is communicated with the oil return interface;
and a second overflow valve is fixedly arranged in the eleventh valve-loading joint and is arranged in the eleventh oil duct.
10. The centering control valve pack of claim 1, wherein:
the valve body is provided with a second detection interface, and the second detection interface is arranged between the third valve loading interface and the butt joint oil port;
and a pressure switch is fixedly arranged in the second detection interface, and the detection end of the pressure switch is arranged in the fifth oil duct.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910915155.0A CN110630571B (en) | 2019-09-26 | 2019-09-26 | Centering control valve group |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910915155.0A CN110630571B (en) | 2019-09-26 | 2019-09-26 | Centering control valve group |
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| CN110630571A CN110630571A (en) | 2019-12-31 |
| CN110630571B true CN110630571B (en) | 2021-04-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910915155.0A Active CN110630571B (en) | 2019-09-26 | 2019-09-26 | Centering control valve group |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| DE102018125053B4 (en) * | 2018-10-10 | 2022-02-17 | Danfoss Power Solutions Aps | Hydraulic steering assembly |
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| CN207790834U (en) * | 2018-01-12 | 2018-08-31 | 集瑞联合重工有限公司 | Special purpose vehicle and its two way all-wheel control system |
| CN110294018A (en) * | 2018-03-23 | 2019-10-01 | 集瑞联合重工有限公司 | Special purpose vehicle and its all-wheel control system |
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| JPS56139319A (en) * | 1980-03-28 | 1981-10-30 | Komatsu Ltd | Liquid pressure circuit for construction machine |
| CN101947975A (en) * | 2010-09-28 | 2011-01-19 | 中国三江航天工业集团公司特种车辆技术中心 | Numerical-control rear-combined steering control device |
| CN102951198A (en) * | 2012-11-14 | 2013-03-06 | 三一重工股份有限公司 | Vehicle and hydraulic steering driving system |
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