CN113931897B - Load-sensitive multi-way valve integrated with multifunctional electric control assembly and engineering machinery - Google Patents
Load-sensitive multi-way valve integrated with multifunctional electric control assembly and engineering machinery Download PDFInfo
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- CN113931897B CN113931897B CN202111294242.2A CN202111294242A CN113931897B CN 113931897 B CN113931897 B CN 113931897B CN 202111294242 A CN202111294242 A CN 202111294242A CN 113931897 B CN113931897 B CN 113931897B
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- 238000013016 damping Methods 0.000 claims abstract description 22
- 230000007246 mechanism Effects 0.000 claims description 15
- 239000003921 oil Substances 0.000 description 119
- 239000010720 hydraulic oil Substances 0.000 description 8
- 230000009471 action Effects 0.000 description 6
- 230000002159 abnormal effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000004043 responsiveness Effects 0.000 description 3
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000010729 system oil Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
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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
- F15B13/027—Check 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
-
- 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
-
- 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
- F15B13/025—Pressure reducing 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
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/04—Special measures taken in connection with the properties of the fluid
- F15B21/041—Removal or measurement of solid or liquid contamination, e.g. filtering
-
- 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
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/08—Servomotor systems incorporating electrically operated control means
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention discloses a load-sensitive multi-way valve integrating a multifunctional electric control assembly and engineering machinery, comprising an oil inlet unit, a plurality of working units and an electric control assembly which are connected in sequence; the working unit comprises a main valve core, a pressure compensation valve arranged at the rear side of the main valve core and a pilot electromagnetic valve arranged at the two sides of the main valve core, wherein the electric control assembly comprises a first electric control assembly and a second electric control assembly, the first electric control assembly comprises a first valve body, a variable damping and a pressure reducing valve, the pressure reducing valve is arranged at the rear side of the variable damping, the second electric control assembly comprises a second valve body, a one-way valve, a safety enabling electromagnetic valve, a walking high-low speed switching electromagnetic valve and a rotation unlocking electromagnetic valve, and the safety enabling electromagnetic valve is respectively communicated with the one-way valve, the walking high-low speed switching electromagnetic valve and the rotation unlocking electromagnetic valve. The invention can simplify the oil way, reduce the risk of oil leakage, improve the system response, greatly simplify the oil way of the hydraulic system of the engineering machinery and save the cost.
Description
Technical Field
The invention relates to a load-sensitive multi-way valve integrated with a multifunctional electric control component and engineering machinery, and belongs to the technical field of engineering machinery hydraulic pressure.
Background
In the prior art, the load-sensitive multi-way valve is widely applied to various engineering machinery, the composite action of a plurality of actuating mechanisms can be realized in the working process of the valve, and when the flow of a pump reaches saturation, the actions of each linkage actuating mechanism are not influenced by the load and are in proportion to the opening of a valve core of a main valve, so that the flow required by different loads is effectively regulated, and the action stability of the whole machine is ensured.
The sheet type load sensitive multiway valve is generally formed by combining a certain number of reversing valve units, and comprises an oil inlet assembly, a working assembly and a tail assembly, wherein the control modes of the sheet type load sensitive multiway valve comprise manual control, hydraulic pilot control and electric proportional control.
At present, a hydraulic system of the engineering machinery vehicle generally adopts a manual control and a hydraulic pilot control sheet type multi-way valve, but the manual control system has the problems that an operator is hard to operate, and each execution action is difficult to coordinate and stably control; the hydraulic pilot control hydraulic system often needs to be provided with a pilot oil source block or each functional valve block independently, and a hydraulic oil way between the pilot oil source block or each functional valve block is complex, so that the hydraulic pilot control hydraulic system has the advantages of more parts, high cost, larger influence on the working stability and the automation degree of the system and easy occurrence of oil leakage risks.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides a load-sensitive multi-way valve integrated with a multifunctional electric control component and engineering machinery, which can simplify an oil way, reduce the risk of oil leakage, improve the system responsiveness, greatly simplify the oil way of a hydraulic system of the engineering machinery and save the cost.
In order to solve the technical problems, the invention is realized by adopting the following technical scheme:
In one aspect, the invention provides a load-sensitive multiway valve integrated with a multifunctional electric control assembly, which comprises an oil inlet unit, a plurality of working units and the electric control assembly which are connected in sequence;
The working unit comprises a main valve core, a pressure compensation valve arranged at the rear side of the main valve core and pilot electromagnetic valves arranged at two sides of the main valve core;
the electric control assembly comprises a first electric control assembly and a second electric control assembly;
the first electric control assembly comprises a first valve body and a variable damping and pressure reducing valve arranged in the first valve body, and the pressure reducing valve is arranged at the rear side of the variable damping;
The second electric control assembly comprises a second valve body, a one-way valve, a safety enabling electromagnetic valve, a walking high-low speed switching electromagnetic valve and a rotary unlocking electromagnetic valve, wherein the one-way valve, the safety enabling electromagnetic valve, the walking high-low speed switching electromagnetic valve and the rotary unlocking electromagnetic valve are arranged in the second valve body, and the safety enabling electromagnetic valve is respectively communicated with the one-way valve, the walking high-low speed switching electromagnetic valve and the rotary unlocking electromagnetic valve.
As a preferred embodiment, the first electronic control assembly further comprises a filter screen arranged in the first valve body, and the filter screen is arranged between the variable damping and the pressure reducing valve.
As a preferred embodiment, the second electronic control assembly further comprises an accumulator, which is provided between the one-way valve and the safety-enabling solenoid valve.
As a preferred embodiment, the oil inlet unit comprises an oil inlet unit valve body and a middle position unloading valve arranged in the oil inlet unit valve body, an oil inlet of the middle position unloading valve is communicated with an oil inlet of the oil inlet unit valve body, and an oil outlet of the middle position unloading valve is communicated with a T1 port of the oil inlet unit valve body.
As a preferable implementation mode, the second valve body is provided with an oil return port, an LS oil port, a walking high-low speed switching port and a rotary motor braking control oil port.
As a preferred implementation mode, the oil inlet joint valve body is internally provided with an overflow valve, an oil inlet of the overflow valve is communicated with the LS oil port, and an oil outlet of the overflow valve is communicated with an oil return port of the oil inlet joint valve body.
As a preferred embodiment, the second valve body is further provided with a rotary motor brake release oil supply port for supplying oil to an unlocking mechanism of the rotary motor, and the rotary motor brake release oil supply port is communicated with an SH port of the unlocking mechanism of the rotary motor.
As a preferable implementation mode, the second valve body is also provided with a pilot oil drain, and the pressure reducing valve, the safety enabling electromagnetic valve, the walking high-low speed switching electromagnetic valve, the rotary unlocking electromagnetic valve and the working link are communicated with the pilot oil drain.
As a preferred embodiment, the pressure reducing valve is an adjustable pressure reducing valve.
On the other hand, the invention also provides engineering machinery, which comprises the load-sensitive multiway valve of the integrated multifunctional electric control assembly.
Compared with the prior art, the invention has the beneficial effects that:
1. The invention provides a load-sensitive multi-way valve integrating a multifunctional electric control assembly, which comprises an oil inlet unit, a plurality of working units and an electric control assembly, wherein the oil inlet unit, the working units and the electric control assembly are connected in sequence; the working unit comprises a main valve core, a pressure compensation valve arranged at the rear side of the main valve core and a pilot electromagnetic valve arranged at the two sides of the main valve core, wherein the electric control assembly comprises a first electric control assembly and a second electric control assembly, the first electric control assembly comprises a first valve body, a variable damping and a pressure reducing valve, the pressure reducing valve is arranged at the rear side of the variable damping, the second electric control assembly comprises a second valve body, a one-way valve, a safety enabling electromagnetic valve, a walking high-low speed switching electromagnetic valve and a rotation unlocking electromagnetic valve, and the safety enabling electromagnetic valve is respectively communicated with the one-way valve, the walking high-low speed switching electromagnetic valve and the rotation unlocking electromagnetic valve. According to the invention, the safety enabling electromagnetic valve, the walking high-low speed switching electromagnetic valve and the rotary unlocking electromagnetic valve are integrated on the multi-way valve, so that the functional valve block which is independently arranged in the hydraulic system can be replaced, the oil way is simplified, the risk of oil leakage is reduced, the system responsiveness is improved, the oil way of the hydraulic system of the engineering machinery is greatly simplified, and the cost is saved.
2. According to the load-sensitive multi-way valve integrated with the multifunctional electric control assembly, the variable damping is arranged between the main oil way and the pilot oil way of the multi-way valve, and the problem of occasional abnormal sound of the pilot oil source block during system operation can be solved by adjusting the damping.
3. According to the engineering machinery provided by the invention, the load-sensitive multi-way valve integrated with the multifunctional electric control assembly is arranged on the engineering machinery, namely, the safety enabling electromagnetic valve, the walking high-low speed switching electromagnetic valve, the rotary unlocking electromagnetic valve, the filter screen, the pressure reducing valve, the one-way valve, the energy accumulator, the control oil ports of all electromagnetic valves and the like are integrated on the load-sensitive multi-way valve, so that the whole hydraulic system and the pipeline arrangement thereof are greatly simplified, and the whole hydraulic system is safer and more intelligent.
Drawings
FIG. 1 is a schematic diagram of the operation of a load-sensitive multiway valve integrated with a multi-functional electronic control assembly according to an embodiment of the present invention;
fig. 2 is a bottom view of a load-sensitive multiway valve integrated with a multi-functional electronic control assembly, provided in an embodiment of the present invention;
FIG. 3 is a front view of a load-sensitive multiway valve integrated with a multi-functional electronic control assembly, provided in an embodiment of the present invention;
FIG. 4 is a detail view at A-A of FIG. 3;
FIG. 5 is a detail view at B-B in FIG. 3;
FIG. 6 is a left side view of FIG. 3;
FIG. 7 is a right side view of FIG. 3;
In the figure: 1. an oil inlet unit; 11. an oil inlet connecting valve body; 12. a neutral position unloading valve; 13. an overflow valve; 2. a work linkage; 21. a main spool; 22. a pressure compensating valve; 23. a pilot electromagnetic valve; 3. an electrical control assembly; 31. a first electronic control assembly; 311. a first valve body; 312. variable damping; 313. a pressure reducing valve; 314. a filter screen; 32. a second electronic control assembly; 321. a second valve body; 322. a one-way valve; 323. a safety enabling solenoid valve; 324. a traveling high-low speed switching electromagnetic valve; 325. a rotary unlocking electromagnetic valve; 326. an accumulator; 4. an unlocking mechanism of the rotary motor; 5. a pilot oil drain port; 51. an oil return port; 52. an LS oil port; 53. a walking high-low speed switching port; 54. Releasing the brake oil supply port of the rotary motor; 55. A rotary motor braking control oil port; 56. SH port; 57. a travel motor speed switching port; 58. TI port; 6. a pilot oil passage; p, main oil way.
Detailed Description
The invention is further described below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical aspects of the present invention, and are not intended to limit the scope of the present invention.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", etc. may explicitly or implicitly include one or more such feature. In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art in a specific case.
Embodiment one:
The invention provides a load-sensitive multi-way valve integrated with a multifunctional electric control assembly 3, wherein the working principle diagram of the load-sensitive multi-way valve is shown in fig. 1, the structure diagram of the load-sensitive multi-way valve is shown in fig. 2-3 and fig. 6-7, the multi-way valve comprises an oil inlet unit 1, a working unit 2 and an electric control assembly 3, and the oil inlet unit 1, a plurality of working units 2 and the electric control assembly 3 are sequentially connected.
In this embodiment, two working units 2 are provided, and the oil inlet unit 1 includes an oil inlet unit valve body 11, a middle position unloading valve 12 and an overflow valve 13, where the middle position unloading valve 12 and the overflow valve 13 are disposed in the oil inlet unit valve body 11. The working unit 2 includes a main valve spool 21, a pressure compensating valve 22, and pilot solenoid valves 23, and specifically, the pressure compensating valve 22 is disposed at the rear side of the main valve spool 21, and more specifically, the pilot solenoid valves 23 are provided in two, and the pilot solenoid valves 23 are disposed at both sides of the main valve spool 21. It should be understood that the number of the working units 2 can be arranged according to actual requirements, and the invention is not limited herein. For example, the work units 2 may be provided in one or three.
The electronic control assembly 3 comprises a first electronic control assembly 31 and a second electronic control assembly 32.
Referring to fig. 5, the variable damping 312 and the pressure reducing valve 313 are disposed in the first valve body 311, the pressure reducing valve 313 is disposed at the rear side of the variable damping 312, the front side of the variable damping 312 is connected with a main oil path P, when the pilot oil source in the system is not required much, but the main pump displacement is larger, and when the main pump provides more hydraulic oil, the hydraulic oil firstly passes through the variable damping 312 in the transition process from the main oil path P to the pilot oil path 6, so as to avoid abnormal noise. That is, by providing the variable damper 312 between the pressure reducing valve 313 and the main oil passage P and adjusting the damping amount of the variable damper 312, it is possible to avoid the problem of occasional abnormal noise of the pilot oil source block when the construction machine operates in the single work unit 2.
It should be noted that, the hydraulic oil provided by the system passes through the main oil path P, passes through the variable damping 312 and the filter screen 314, then enters the pressure reducing valve 313, and then passes through the check valve 322 to be connected with the safety enabling electromagnetic valve 323. The outlet of the safety-enabling solenoid valve 323 communicates with the common pilot oil passage 6.
Specifically, the outlet of the safety enabling electromagnetic valve 323 is communicated with the pilot oil duct 6 of the working link 2, so as to provide oil sources for the pilot electromagnetic valves 23 on both sides of the working link 2, and ensure that the safety enabling electromagnetic valve 323 can be opened, so that the executing mechanism executes actions, and the mechanical vehicle runs safely and reliably.
The outlet of the safety enabling electromagnetic valve 323 is communicated with the walking high-low speed switching electromagnetic valve 324, and when the walking high-low speed switching electromagnetic valve 324 is not electrified, the channel is blocked, so that the walking speed is ensured to be stable and reliable. When the traveling high-low speed switching solenoid valve 324 is electrified, hydraulic oil is connected with the traveling motor speed switching port 57 through the traveling high-low speed switching port 53, so that the traveling speed can be switched between high speed and low speed, and when the traveling high-low speed switching port 53 is communicated with the traveling motor speed switching port 57, the left traveling motor and the right traveling motor are switched from low speed to high speed for traveling.
In order to provide the oil source output for the unlocking mechanism 4 of the swing motor, the outlet of the safety enabling electromagnetic valve 323 is communicated with a swing motor brake release oil supply port 54, and the swing motor brake release oil supply port 54 is arranged on the second valve body 321.
In this embodiment, the outlet of the safety enabling electromagnetic valve 323 is further connected to the rotary unlocking electromagnetic valve 325, when the rotary unlocking electromagnetic valve 325 is not electrified, the passage of the rotary unlocking electromagnetic valve 325 is blocked, when the rotary unlocking electromagnetic valve 325 is electrified, hydraulic oil is connected to the SH port 56 of the unlocking mechanism 4 of the rotary motor through the rotary motor release control oil port 55, so as to push the unlocking mechanism 4 of the rotary motor to be placed in the upper working position, and the rotary motor releases the oil in the brake oil supply port 54 to flow into the brake oil cylinder of the rotary motor, thereby realizing the brake unlocking of the rotary motor.
As a preferred embodiment, the pressure reducing valve 313 is an adjustable pressure reducing valve, and by setting the pressure reducing valve 313 as an adjustable pressure reducing valve, the pilot pressure of the outlet of the adjustable pressure reducing valve can be appropriately adjusted within a certain range, so as to meet the requirements of different pilot pressures and adapt to more engineering vehicles.
The second electronic control assembly 32 includes a second valve body 321, a check valve 322, a safety enabling electromagnetic valve 323, a walking high-low speed switching electromagnetic valve 324, and a rotation unlocking electromagnetic valve 325, please refer to fig. 4, the check valve 322, the safety enabling electromagnetic valve 323, the walking high-low speed switching electromagnetic valve 324, and the rotation unlocking electromagnetic valve 325 are disposed in the second valve body 321, and the safety enabling electromagnetic valve 323 is respectively communicated with the check valve 322, the walking high-low speed switching electromagnetic valve 324, and the rotation unlocking electromagnetic valve 325. Specifically, the inlet of the safety enabling solenoid valve 323 is connected with the outlet of the check valve 322, and the inlets of the walking high-low speed switching solenoid valve 324 and the swing unlocking solenoid valve 325 are connected with the outlet of the safety enabling solenoid valve 323.
The second valve body 321 is provided with an oil return port 51, an LS port 52, a travel high-low speed switching port 53, and a swing motor release control port 55. The oil return port 51 is an oil return port of the main oil path P, and is used for oil return of an actuating mechanism on the working unit 2, and is used for oil return of an outlet of the middle position unloading valve 12 and an outlet of the overflow valve 13, specifically, an oil inlet of the overflow valve 13 is communicated with the LS oil port 52, and an oil outlet of the overflow valve 13 is communicated with the oil return port 51 of the oil inlet unit valve body 11. In this embodiment, the oil inlet of the middle position unloading valve 12 is communicated with the oil inlet of the oil inlet linkage valve body 11, and the oil outlet of the middle position unloading valve 12 is communicated with the TI port 58 of the oil inlet linkage valve body 11.
The second valve body 321 is further provided with a pilot oil drain port 5, and the pressure reducing valve 313, the safety enabling electromagnetic valve 323, the walking high-low speed switching electromagnetic valve 324, the rotation unlocking electromagnetic valve 325 and the working link 2 are communicated with the pilot oil drain port 5. When the safety enabling solenoid valve 323, the traveling high-low speed switching solenoid valve 324 and the swing unlocking solenoid valve 325 do not work, they are all communicated with the hydraulic oil tank.
Because impurities can exist in the hydraulic oil of the system, the pilot oil duct 6 is generally slender and easy to block, and the multi-way valve is disabled, in order to ensure the normal operation of the system, the first electric control assembly 31 further comprises a filter screen 314 arranged in the first valve body 311, the filter screen 314 is arranged between the variable damping 312 and the pressure reducing valve 313, and the filter screen 314 can prevent impurities in the oil from entering all the pilot oil ducts 6.
The second electronic control assembly 32 further comprises an accumulator 326, the accumulator 326 is arranged between the check valve 322 and the safety enabling electromagnetic valve 323, when the engine is started, the accumulator 326 can charge the accumulator 326, but after the safety enabling electromagnetic valve 323 is opened, the accumulator 326 can provide oil sources for the work units 2, so that the main valve core 21 of each work unit 2 can be reversed left and right, and the reserved pressure unloading is realized when the actuating mechanism stops acting, so that the safety of the whole vehicle is ensured.
After the engine is started, the main oil path P of the multi-way valve is sequentially connected with the variable damping 312, the filter screen 314 and the adjustable pressure reducing valve of the first electric control assembly 31 through the oil inlet unit 1 and the working unit 2, the pressure oil of the main oil path P is converted into a pilot oil source, after the safety enabling electromagnetic valve 323 is opened by an operator, the pilot oil source provides the pilot oil source for the four positions, and the operator can operate the executing mechanisms controlled by the working units 2 and simultaneously charge the accumulator 326. When the execution action is finished, the engine is extinguished and electrified, at the moment, the main oil way P has no oil source, the energy accumulator 326 provides a small amount of pilot oil source for the two working units 2 and is used for the execution mechanism to unload the self pressure, and after the execution mechanism finishes the pressure release, the safety enabling electromagnetic valve 323 is closed and the power is cut off, so that the whole set of working flow of the whole machine is finished.
The internal pilot oil supply of the electric control assembly 3 is connected with pilot electromagnetic valves 23 at two sides of the working link 2, and a pilot oil drain port 5 of the electric control assembly is connected with oil drain ports of the pilot electromagnetic valves 23 at two sides of the working link 2;
It should be noted that, the first valve body 311 and the second valve body 321 may further be provided with an oil inlet to meet different requirements. It should be understood by those skilled in the art that the load-sensitive multiway valve of the integrated multifunctional electronic control assembly 3 designed by the invention can also reduce or add new functions to be integrated on the electronic control assembly 3, and can also be additionally provided with an oil inlet to serve as the multiway valve oil inlet unit 1.
In this embodiment, the number of the electric control assemblies 3 is not limited to the first electric control assembly 31 and the second electric control assembly 32, and after understanding the essence of the present invention, one skilled in the art may set the electric control assemblies 3 into one or three or more, and the configuration of the multiway valve is only one expression of the present invention, and any substitution based on the essence of the present invention is within the scope of the present invention.
According to the invention, the safety enabling electromagnetic valve 323, the walking high-low speed switching electromagnetic valve 324 and the rotary unlocking electromagnetic valve 325 are integrated on the multi-way valve, so that the functional valve blocks independently arranged in the hydraulic system can be replaced, the oil path is simplified, the risk of oil leakage is reduced, the system responsiveness is improved, the oil path of the hydraulic system of the whole vehicle and the pipeline arrangement thereof are greatly simplified, the risk of oil leakage is reduced, the cost is saved, and the whole system is safer and more intelligent, thereby improving the control efficiency.
Embodiment two:
The invention also provides engineering machinery, and the load-sensitive multiway valve of the integrated multifunctional electric control assembly 3 in the embodiment I is adopted.
The multi-way valve comprises an oil inlet unit 1, two working units 2, a first electric control assembly 31 and a second electric control assembly 32 which are sequentially connected, wherein the oil inlet unit 1 comprises an oil inlet unit valve body 11, a middle position unloading valve 12 and an overflow valve 13, the working units 2 comprise a main valve core 21, a pressure compensation valve 22 and a pilot electromagnetic valve 23, the first electric control assembly 31 comprises a first valve body 311, a variable damping 312 and a pressure reducing valve 313, the second electric control assembly 32 comprises a second valve body 321, a one-way valve 322, a safety enabling electromagnetic valve 323, a walking high-low speed switching electromagnetic valve 324 and a rotary unlocking electromagnetic valve 325, and the oil inlet unit 1, the working units 2, the first electric control assembly 31 and the second electric control assembly 32 are mutually matched and can replace a functional valve block which is independently arranged in a hydraulic system, so that the oil way is simplified, the risk of oil leakage is reduced, and the hydraulic system oil way of the engineering machinery is simplified.
According to the engineering machinery provided by the invention, the load-sensitive multi-way valve integrated with the multifunctional electric control assembly 3 is arranged on the engineering machinery, namely, the safety enabling electromagnetic valve 323, the walking high-low speed switching electromagnetic valve 324, the rotary unlocking electromagnetic valve 325, the filter screen 314, the pressure reducing valve 313, the one-way valve 322, the energy accumulator 326, the control oil ports of all electromagnetic valves and the like are integrated on the load-sensitive multi-way valve, so that the whole system is safer and more intelligent.
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that modifications and variations could be made by those skilled in the art without departing from the technical principles of the present invention, and such modifications and variations should also be regarded as being within the scope of the invention.
Claims (9)
1. A load-sensitive multiway valve integrated with a multifunctional electric control component is characterized in that,
Comprises an oil inlet unit, a plurality of working units and an electric control assembly which are connected in sequence;
The oil inlet unit comprises an oil inlet unit valve body and a middle position unloading valve arranged in the oil inlet unit valve body, an oil inlet of the middle position unloading valve is communicated with an oil inlet of the oil inlet unit valve body, and an oil outlet of the middle position unloading valve is communicated with a T1 port of the oil inlet unit valve body;
The working unit comprises a main valve core, a pressure compensation valve arranged at the rear side of the main valve core and pilot electromagnetic valves arranged at two sides of the main valve core;
the electric control assembly comprises a first electric control assembly and a second electric control assembly;
the first electric control assembly comprises a first valve body and a variable damping and pressure reducing valve arranged in the first valve body, and the pressure reducing valve is arranged at the rear side of the variable damping;
The second electric control assembly comprises a second valve body, a one-way valve, a safety enabling electromagnetic valve, a walking high-low speed switching electromagnetic valve and a rotary unlocking electromagnetic valve, wherein the one-way valve, the safety enabling electromagnetic valve, the walking high-low speed switching electromagnetic valve and the rotary unlocking electromagnetic valve are arranged in the second valve body, and the safety enabling electromagnetic valve is respectively communicated with the one-way valve, the walking high-low speed switching electromagnetic valve and the rotary unlocking electromagnetic valve.
2. The integrated multi-function electronically controlled assembly load-sensitive multiplex valve of claim 1, wherein,
The first electric control assembly further comprises a filter screen arranged in the first valve body, and the filter screen is arranged between the variable damping and the pressure reducing valve.
3. The integrated multi-function electronically controlled assembly load-sensitive multiplex valve of claim 1, wherein,
The second electric control assembly further comprises an energy accumulator, and the energy accumulator is arranged between the one-way valve and the safety enabling electromagnetic valve.
4. The integrated multi-function electronically controlled assembly load-sensitive multiplex valve of claim 1, wherein,
And the second valve body is provided with an oil return port, an LS oil port, a walking high-low speed switching port and a rotary motor braking control oil port.
5. The load sensitive multiplex valve integrated with a multi-function electronic control assembly as defined in claim 4 wherein,
An overflow valve is further arranged in the oil inlet connecting valve body, an oil inlet of the overflow valve is communicated with the LS oil port, and an oil outlet of the overflow valve is communicated with an oil return port of the oil inlet connecting valve body.
6. The load sensitive multiplex valve integrated with a multi-function electronic control assembly as defined in claim 5 wherein,
The second valve body is also provided with a rotary motor brake release oil supply port for supplying oil to an unlocking mechanism of the rotary motor, and the rotary motor brake release oil supply port is communicated with an SH port of the unlocking structure of the rotary motor.
7. The load sensitive multiplex valve integrated with a multi-function electronic control assembly as defined in claim 5 wherein,
And the second valve body is also provided with a pilot oil drain port, and the pressure reducing valve, the safety enabling electromagnetic valve, the walking high-low speed switching electromagnetic valve, the rotary unlocking electromagnetic valve and the working link are communicated with the pilot oil drain port.
8. The integrated multi-function electronically controlled assembly load-sensitive multiplex valve of claim 1, wherein,
The pressure reducing valve is an adjustable pressure reducing valve.
9. An engineering machine is characterized in that,
A load sensitive multiway valve comprising an integrated multi-functional electronic control assembly according to any of claims 1-8.
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| CN105840574A (en) * | 2015-01-16 | 2016-08-10 | 徐工集团工程机械股份有限公司 | Load-sensitive multi-way valve and hydraulic system of engineering machine |
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| CN109723693A (en) * | 2019-01-15 | 2019-05-07 | 江苏徐工工程机械研究院有限公司 | Load-sensitive multi-way valve and hydraulic system |
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2021
- 2021-11-03 CN CN202111294242.2A patent/CN113931897B/en active Active
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| CN203835840U (en) * | 2014-04-16 | 2014-09-17 | 徐工集团工程机械股份有限公司 | Plate type load-sensitive multi-tandem valve tail link |
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| CN113931897A (en) | 2022-01-14 |
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