CN109340203A - Hydraulic moving control system and hydraulic travel system - Google Patents
Hydraulic moving control system and hydraulic travel system Download PDFInfo
- Publication number
- CN109340203A CN109340203A CN201811491088.6A CN201811491088A CN109340203A CN 109340203 A CN109340203 A CN 109340203A CN 201811491088 A CN201811491088 A CN 201811491088A CN 109340203 A CN109340203 A CN 109340203A
- Authority
- CN
- China
- Prior art keywords
- valve
- oil
- port
- communicated
- oil inlet
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000007935 neutral effect Effects 0.000 claims 1
- 239000012530 fluid Substances 0.000 abstract 3
- 239000002828 fuel tank Substances 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 5
- 238000005265 energy consumption Methods 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000001174 ascending effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007717 exclusion Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
Classifications
-
- 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
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The embodiment of the invention discloses a kind of hydraulic moving control systems, comprising: pressure-gradient control valve, brake valve, direction valve, check valve and traveling control device；The oil inlet of pressure-gradient control valve is for connecting pressure oil-source, and the priority port of pressure-gradient control valve is connected to the oil inlet of direction valve, and the by-pass port of pressure-gradient control valve is connected to the oil inlet of traveling control device；The oil return opening of direction valve is connected to the oil inlet of check valve, and multiple actuator ports of direction valve are used to connect the hydraulic fluid port for turning to actuator；The oil outlet of check valve is connected to the oil inlet of traveling control device；The oil inlet of brake valve is connected to the oil inlet of pressure-gradient control valve, and the actuator port of brake valve is used to connect the hydraulic fluid port of brake actuator, and the drain tap of brake valve is connected to the oil return opening of traveling control device；For the oil return opening of traveling control device for being connected to fuel tank, multiple actuator ports of traveling control device are used to connect the hydraulic fluid port of at least one running motor.The embodiment of the invention also discloses the hydraulic travel systems using above-mentioned control system.
Description
Technical Field
The invention relates to the field of hydraulic walking control systems, in particular to a hydraulic walking control system and a hydraulic walking system.
Background
In a single-oil-source walking control system (such as a walking control system in a self-walking scissor-fork type aerial work platform), the opening pressure for opening the parking brake has a certain pressure threshold, the pressure in a simple walking system is usually taken as an oil inlet of a walking control valve, the condition that the parking brake is opened is sufficient when equipment runs on a flat ground or an ascending slope, but when the equipment runs on the descending slope, a motor stalls, so that oil is not sufficiently fed, the parking brake is enabled to act in the walking process, and the service life of the equipment is shortened or damaged. In order to avoid this phenomenon, a sequence valve is usually provided in the oil inlet path, and the setting value of the sequence valve is equal to the full opening pressure of the parking brake, so as to protect the safety of the equipment. However, the sequence valve arranged on the main oil gallery increases the resistance of a system loop, and the resistance cannot be used as oil supplementing pressure, so that the power loss is invalid, and the energy consumption and the system heating are increased.
Disclosure of Invention
In order to overcome the defects and shortcomings of the prior art, the embodiment of the invention provides a hydraulic walking control system and a hydraulic walking system with low pressure loss, low energy consumption and low heating.
In one aspect, the present invention provides a hydraulic walking control system, including: the device comprises a priority valve, a brake valve, a directional valve, a one-way valve and a walking control device; an oil inlet of the priority valve is used for being connected with a pressure oil source, a priority port of the priority valve is communicated with an oil inlet of the directional valve, and a bypass port of the priority valve is communicated with an oil inlet of the walking control device; an oil return port of the directional valve is communicated with an oil inlet of the one-way valve, and a plurality of working oil ports of the directional valve are used for being connected with oil ports of a steering actuator; an oil outlet of the one-way valve is communicated with the oil inlet of the walking control device; an oil inlet of the brake valve is communicated with the oil inlet of the priority valve, a working oil port of the brake valve is used for being connected with an oil port of a brake actuator, and an oil drainage port of the brake valve is communicated with an oil return port of the walking control device; the oil return port of the walking control device is used for being communicated with an oil tank, and a plurality of working oil ports of the walking control device are used for being connected with oil ports of at least one walking motor.
In one embodiment of the present invention, the hydraulic walking control system further comprises: and the oil inlet and the oil outlet of the first overflow valve are communicated with the priority port and the bypass port of the priority valve in a one-to-one correspondence manner.
In an embodiment of the present invention, the direction valve is the three-position four-way reversing valve, and when the three-position four-way reversing valve is located at a middle position, the oil inlet of the three-position four-way reversing valve is communicated with the oil return port of the three-position four-way reversing valve.
In an embodiment of the present invention, the brake valve is a hydraulic control directional valve, the hydraulic control directional valve has a hydraulic control interface, and the hydraulic control interface is communicated with the oil inlet of the walking control device.
In one embodiment of the present invention, the brake valve is an electrically controlled directional valve, the electrically controlled directional valve has an electrically controlled interface, and the electrically controlled interface is used for connecting with an electronic control system.
In one embodiment of the invention, the walking control device is provided with a brake external control interface, and the brake external control interface is communicated with the working oil port of the brake valve.
In one embodiment of the present invention, the hydraulic walking control system further comprises: the second direction valve is used for connecting the pressure oil source to the oil inlet of the priority valve; an oil inlet of the second directional valve is used for being connected with the pressure oil source, an oil return port of the second directional valve is used for being connected with the oil tank, a first working oil port of the second directional valve is used for being connected with an oil port of a third actuator, and a second working oil port of the second directional valve is communicated with the oil inlet of the priority valve; the oil inlets and the oil outlets of the second overflow valve are communicated with the oil inlets and the oil return ports of the second directional valve in a one-to-one correspondence manner; and an oil inlet and an oil outlet of the third overflow valve are communicated with the first working oil port and the oil return port of the second directional valve in a one-to-one correspondence manner.
On the other hand, the invention also provides a hydraulic traveling system, which comprises: the device comprises a priority valve, an overflow valve, a brake valve, a directional valve, a one-way valve, a walking control device, at least one walking motor, a brake actuator, a steering actuator, a pressure oil source and an oil tank; an oil inlet of the priority valve is connected with the pressure oil source, a priority port of the priority valve is communicated with an oil inlet of the directional valve, and a bypass port of the priority valve is communicated with an oil inlet of the walking control device; the oil inlets and the oil outlets of the overflow valves are communicated with the priority port and the bypass port of the priority valve in a one-to-one correspondence manner; an oil return port of the directional valve is communicated with an oil inlet of the one-way valve, and a plurality of working oil ports of the directional valve are communicated with a plurality of oil ports of the steering actuator in a one-to-one correspondence manner; an oil outlet of the one-way valve is communicated with the oil inlet of the walking control device; an oil inlet of the brake valve is communicated with the oil inlet of the priority valve, a working oil port of the brake valve is communicated with an oil port of the brake actuator, and an oil drainage port of the brake valve is communicated with an oil return port of the walking control device; the oil return port of the walking control device is communicated with the oil tank, and the oil ports of the walking control device are communicated with the oil ports of the at least one walking motor in a one-to-one correspondence mode.
In an embodiment of the present invention, the brake valve is a hydraulic control directional valve, the hydraulic control directional valve has a hydraulic control interface, and the hydraulic control interface is communicated with the oil inlet of the walking control device; or the brake valve is an electric control directional valve, the electric control directional valve is provided with an electric control interface, and the electric control interface is used for being connected with an electric control system; or the walking control device is provided with a braking external control interface which is communicated with the working oil port of the brake valve.
In one embodiment of the present invention, the hydraulic traveling system further includes: the second directional valve is connected with the pressure oil source to the oil inlet of the priority valve; an oil inlet of the second directional valve is communicated with the pressure oil source, an oil return port of the second directional valve is communicated with the oil tank, a first working oil port of the second directional valve is communicated with an oil port of the third actuator, and a second working oil port of the second directional valve is communicated with the oil inlet of the priority valve; the oil inlets and the oil outlets of the second overflow valve are communicated with the oil inlets and the oil return ports of the second directional valve in a one-to-one correspondence manner; and an oil inlet and an oil outlet of the third overflow valve are communicated with the first working oil port and the oil return port of the second directional valve in a one-to-one correspondence manner.
The hydraulic walking control system and the hydraulic walking system adopt a new braking release scheme: the hydraulic traveling control system and the hydraulic traveling system have the advantages of low pressure loss, low energy consumption and low heating because a sequence valve is not arranged on a main oil duct.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic diagram of a hydraulic travel control system and a hydraulic travel system according to an embodiment of the present invention;
FIG. 2 is a further schematic diagram of the hydraulic travel system of FIG. 1;
FIG. 3 is a further schematic diagram of the hydraulic travel system of FIG. 1;
FIG. 4 is a further schematic diagram of the hydraulic travel system of FIG. 1;
fig. 5 is a further schematic diagram of the hydraulic travel system of fig. 1.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
First embodiment
As shown in fig. 1, a first embodiment of the present invention provides a hydraulic walk control system 100 including: a priority valve 1, a brake valve 3, a directional valve 4, a check valve 5 and a traveling control device 6; an oil inlet P1.1 of the priority valve 1 is used for being connected with a pressure oil source, a priority port P1.3 of the priority valve 1 is communicated with an oil inlet P4.3 of the directional valve 4, and a bypass port P1.2 of the priority valve 1 is communicated with an oil inlet P6.2 of the walking control device 6; an oil return port P4.1 of the directional valve 4 is communicated with an oil inlet P5.1 of the one-way valve 5, and a plurality of working oil ports P4.2 and P4.4 of the directional valve 4 are used for being connected with an oil port of a steering actuator L4; an oil outlet P5.2 of the one-way valve 5 is communicated with the oil inlet P6.2 of the walking control device 6; an oil inlet P3.3 of the brake valve 3 is communicated with the oil inlet P1.1 of the priority valve 1, a working oil port P3.2 of the brake valve 3 is used for connecting an oil port of a brake actuator L3, and an oil drainage port P3.1 of the brake valve 3 is communicated with an oil return port P6.1 of the walking control device 6; the oil return port P6.1 of the walking control device 6 is used for being communicated with an oil tank, and a plurality of working oil ports P6.3, P6.6, P6.4 and P6.5 of the walking control device 6 are used for being connected with oil ports of at least one walking motor.
It should be noted that the specific types of the priority valve 1, the brake valve 3, the directional valve 4, the check valve 5 and the travel control device 6 may be set as required, and these are all within the technical concept of the present invention, for example, the directional valve 4 may be a three-position four-way reversing valve.
Specifically, the hydraulic walking control system 100 further includes: and an oil inlet P2.1 and an oil outlet P2.2 of the overflow valve 2 are communicated with the priority port P1.3 and the bypass port P1.2 of the priority valve 1 in a one-to-one correspondence manner, so that the functions of constant pressure overflow, pressure stabilization, system unloading and safety protection are achieved.
More specifically, the directional valve 4 is the three-position four-way reversing valve, and when the three-position four-way reversing valve is located at the middle position, the oil inlet P4.3 of the three-position four-way reversing valve is communicated with the oil return port P4.1 of the three-position four-way reversing valve.
More specifically, the brake valve 3 is a hydraulic control directional valve (as shown in fig. 2, for example, a hydraulic control two-position three-way reversing valve), the hydraulic control directional valve has a hydraulic control interface P3.4, and the hydraulic control interface P3.4 is communicated with the oil inlet P6.2 of the traveling control device 6; or the brake valve 3 is an electrically controlled directional valve (as shown in fig. 3, for example, an electrically controlled two-position three-way directional valve), the electrically controlled directional valve has an electrically controlled interface P3.4, and the electrically controlled interface P3.4 is used for connecting with an electronic control system; or the walking control device 6 has a brake external control port P6.7 (as shown in fig. 4), and the brake external control port P6.7 is communicated with the working oil port P3.2 of the brake valve 3.
Further specifically, as shown in fig. 5, the hydraulic walking control system 100 further includes: a direction valve 7 (such as a two-position four-way reversing valve), an overflow valve 8 and an overflow valve 9, wherein the direction valve 7 is used for connecting the pressure oil source P to the oil inlet P1.1 of the priority valve 1; an oil inlet P7.3 of the directional valve 7 is used for being connected with the pressure oil source P, an oil return port P7.1 of the directional valve 7 is used for being connected with the oil tank, a first working oil port P7.2 of the directional valve 7 is used for being connected with an oil port LA of an actuator L5 (such as a lifting oil cylinder of an aerial work platform or a general name of other actuating mechanisms with logical mutual exclusion requirements on a walking mode), and a second working oil port P7.4 of the directional valve 7 is communicated with the oil inlet P1.1 of the priority valve 1; an oil inlet P8.1 and an oil outlet P8.2 of the overflow valve 8 are communicated with the oil inlet P7.3 and the oil return port P7.1 of the directional valve 7 in a one-to-one correspondence manner; and oil inlets P9.1 and oil outlets P9.2 of the overflow valve 9 are communicated with the first working oil ports P7.2 and the oil return ports P7.1 of the directional valve 7 in a one-to-one correspondence manner.
The hydraulic travel control system 100 of the present invention is implemented by employing a new brake release scheme: the opening requirement of the parking brake valve 3 is met before the brake pressure oil is taken from the priority valve 1 (the working pressure difference of the priority valve 1 in the walking process under any working condition is more than 15 bar), meanwhile, the opening of the brake valve 3 is related to a walking control signal or the working pressure of an oil inlet of the walking control device 6 (when the walking is not in work, the pressure of the oil inlet is lower than the action pressure threshold value of the brake valve 3), so that the coordination between the brake valve 3 and the walking action is ensured, in addition, a sequence valve is not arranged on a main oil duct, and the hydraulic walking control system 100 has the advantages of low pressure loss, low energy consumption and low heating.
Second embodiment
As shown in fig. 1, a second embodiment of the present invention provides a hydraulic walking system 200, including: a priority valve 1, an overflow valve 2, a brake valve 3, a directional valve 4, a check valve 5, a travel control device 6, at least one (e.g., two) travel motors L1, L2, a brake actuator L3, a steering actuator L4, a pressure oil source P, and an oil tank T; an oil inlet P1.1 of the priority valve 1 is connected with the pressure oil source P, a priority port P1.3 of the priority valve 1 is communicated with an oil inlet P4.3 of the directional valve 4, and a bypass port P1.2 of the priority valve 1 is communicated with an oil inlet P6.2 of the walking control device 6; an oil inlet P2.1 and an oil outlet P2.2 of the overflow valve 2 are communicated with the priority port P1.3 and the bypass port P1.2 of the priority valve 1 in a one-to-one correspondence manner; an oil return port P4.1 of the directional valve 4 is communicated with an oil inlet P5.1 of the one-way valve 5, and a plurality of working oil ports P4.2 and P4.4 of the directional valve 4 are communicated with a plurality of oil ports TA and TB of the steering actuator L4 in a one-to-one correspondence manner; an oil outlet P5.2 of the one-way valve 5 is communicated with the oil inlet P6.2 of the walking control device 6; an oil inlet P3.3 of the brake valve 3 is communicated with the oil inlet P1.1 of the priority valve 1, a working oil port P3.2 of the brake valve 3 is communicated with an oil port BR of the brake actuator L3, and an oil drainage port P3.1 of the brake valve 3 is communicated with an oil return port P6.1 of the walking control device 6; the oil return port P6.1 of the traveling control device 6 is communicated with the oil tank T, and the plurality of oil ports P6.3, P6.6, P6.4, P6.5 of the traveling control device 6 are communicated with the plurality of oil ports F1, B1, B2, F2 of the at least one traveling motor L1, L2 in a one-to-one correspondence manner.
It should be noted that the specific types of the priority valve 1, the relief valve 2, the brake valve 3, the directional valve 4, the check valve 5, the travel control device 6, the travel motors L1, L2, the brake actuator L3, and the steering actuator L4 may be set as needed, which all fall within the technical concept of the present invention, and for example, the directional valve 4 may be a three-position four-way directional valve.
Specifically, the brake valve 3 is a hydraulic control directional valve (as shown in fig. 2, for example, a hydraulic control two-position three-way directional valve), the hydraulic control directional valve has a hydraulic control interface P3.4, and the hydraulic control interface P3.4 is communicated with the oil inlet P6.2 of the traveling control device 6; or the brake valve 3 is an electrically controlled directional valve (as shown in fig. 3, for example, an electrically controlled two-position three-way directional valve), the electrically controlled directional valve has an electrically controlled interface P3.4, and the electrically controlled interface P3.4 is used for connecting with an electronic control system; or the walking control device 6 has a brake external control port P6.7 (as shown in fig. 4), and the brake external control port P6.7 is communicated with the working oil port P3.2 of the brake valve 3.
More specifically, as shown in fig. 5, the hydraulic traveling system 200 further includes: a direction valve 7 (such as a two-position four-way reversing valve), a relief valve 8, a relief valve 9 and an actuator L5, wherein the direction valve 7 connects the pressure oil source P to the oil inlet P1.1 of the priority valve 1; an oil inlet P7.3 of the directional valve 7 is communicated with the pressure oil source P, an oil return port P7.1 of the directional valve 7 is communicated with the oil tank T, a first working oil port P7.2 of the directional valve 7 is communicated with an oil port LA of the actuator L5, and a second working oil port P7.4 of the directional valve 7 is communicated with the oil inlet P1.1 of the priority valve 1; an oil inlet P8.1 and an oil outlet P8.2 of the overflow valve 8 are communicated with the oil inlet P7.3 and the oil return port P7.1 of the directional valve 7 in a one-to-one correspondence manner; and oil inlets P9.1 and oil outlets P9.2 of the overflow valve 9 are communicated with the first working oil ports P7.2 and the oil return ports P7.1 of the directional valve 7 in a one-to-one correspondence manner.
The hydraulic traveling system 200 of the present invention adopts a new brake release scheme: the opening requirement of the parking brake valve 3 is met before the brake pressure oil is taken from the priority valve 1 (the working pressure difference of the priority valve 1 in the walking process under any working condition is more than 15 bar), meanwhile, the opening of the brake valve 3 is related to a walking control signal or the working pressure of an oil inlet of the walking control device 6 (when the walking is not in work, the pressure of the oil inlet is lower than the action pressure threshold value of the brake valve 3), so that the coordination between the brake valve 3 and the walking action is ensured, in addition, the hydraulic walking system 200 has the advantages of low pressure loss, low energy consumption and low heating because a sequence valve is not arranged on a main oil duct.
The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, however, the present invention is not limited to the specific details of the above embodiments, and various simple modifications can be made to the technical solution of the present invention within the technical idea of the present invention, and these simple modifications are within the protective scope of the present invention.
It should be noted that the various technical features described in the above embodiments can be combined in any suitable manner without contradiction, and the invention is not described in any way for the possible combinations in order to avoid unnecessary repetition.
In addition, any combination of the various embodiments of the present invention is also possible, and the same should be considered as the disclosure of the present invention as long as it does not depart from the spirit of the present invention.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A hydraulic walk control system (100), comprising: a priority valve (1), a brake valve (3), a directional valve (4), a one-way valve (5) and a walking control device (6);
an oil inlet (P1.1) of the priority valve (1) is used for being connected with a pressure oil source, a priority port (P1.3) of the priority valve (1) is communicated with an oil inlet (P4.3) of the directional valve (4), and a bypass port (P1.2) of the priority valve (1) is communicated with an oil inlet (P6.2) of the walking control device (6);
an oil return port (P4.1) of the directional valve (4) is communicated with an oil inlet (P5.1) of the one-way valve (5), and a plurality of working oil ports (P4.2, P4.4) of the directional valve (4) are used for being connected with an oil port of a steering actuator (L4);
an oil outlet (P5.2) of the one-way valve (5) is communicated with the oil inlet (P6.2) of the walking control device (6);
an oil inlet (P3.3) of the brake valve (3) is communicated with an oil inlet (P1.1) of the priority valve (1), a working oil port (P3.2) of the brake valve (3) is used for being connected with an oil port of a brake actuator (L3), and an oil drainage port (P3.1) of the brake valve (3) is communicated with an oil return port (P6.1) of the walking control device (6);
the oil return port (P6.1) of the walking control device (6) is used for being communicated with an oil tank, and the working oil ports (P6.3, P6.6, P6.4 and P6.5) of the walking control device (6) are used for being connected with the oil port of at least one walking motor.
2. The hydraulic travel control system (100) of claim 1, wherein the hydraulic travel control system (100) further comprises:
the oil inlet (P2.1) and the oil outlet (P2.2) of the first overflow valve (2) are communicated with the priority port (P1.3) and the bypass port (P1.2) of the priority valve (1) in a one-to-one correspondence mode.
3. The hydraulic travel control system (100) according to claim 1, wherein the directional valve (4) is the three-position four-way directional valve, and when the three-position four-way directional valve is in the neutral position, the oil inlet (P4.3) of the three-position four-way directional valve is communicated with the oil return port (P4.1) of the three-position four-way directional valve.
4. The hydraulic walking control system (100) according to claim 1, characterized in that the brake valve (3) is a pilot operated directional valve having a pilot operated interface (P3.4), and the pilot operated interface (P3.4) is in communication with the oil inlet (P6.2) of the walking control device (6).
5. The hydraulic walking control system (100) according to claim 1, characterized in that the brake valve (3) is an electrically controlled directional valve having an electrically controlled interface (P3.4), and the electrically controlled interface (P3.4) is used for connection with an electronic control system.
6. The hydraulic walking control system (100) of claim 1, wherein the walking control device (6) has a brake external control interface (P6.7), and the brake external control interface (P6.7) is communicated with the working oil port (P3.2) of the brake valve (3).
7. The hydraulic travel control system (100) of any one of claims 1 to 6, characterized in that the hydraulic travel control system (100) further comprises: a second directional valve (7), a second overflow valve (8) and a third overflow valve (9), and the second directional valve (7) is used for connecting the pressure oil source (P) to the oil inlet (P1.1) of the priority valve (1); wherein,
an oil inlet (P7.3) of the second directional valve (7) is used for being connected with the pressure oil source (P), an oil return port (P7.1) of the second directional valve (7) is used for being connected with the oil tank, a first working oil port (P7.2) of the second directional valve (7) is used for being connected with an oil port of a third actuator (L5), and a second working oil port (P7.4) of the second directional valve (7) is communicated with the oil inlet (P1.1) of the priority valve (1);
an oil inlet (P8.1) and an oil outlet (P8.2) of the second overflow valve (8) are communicated with the oil inlet (P7.3) and the oil return port (P7.1) of the second directional valve (7) in a one-to-one correspondence manner;
and an oil inlet (P9.1) and an oil outlet (P9.2) of the third overflow valve (9) are communicated with the first working oil port (P7.2) and the oil return port (P7.1) of the second directional valve (7) in a one-to-one correspondence manner.
8. A hydraulic walking system (200), comprising: a priority valve (1), an overflow valve (2), a brake valve (3), a directional valve (4), a one-way valve (5), a travel control device (6), at least one travel motor (L1, L2), a brake actuator (L3), a steering actuator (L4), a pressure oil source (P) and an oil tank (T);
an oil inlet (P1.1) of the priority valve (1) is connected with the pressure oil source (P), a priority port (P1.3) of the priority valve (1) is communicated with an oil inlet (P4.3) of the directional valve (4), and a bypass port (P1.2) of the priority valve (1) is communicated with an oil inlet (P6.2) of the walking control device (6);
the oil inlet (P2.1) and the oil outlet (P2.2) of the overflow valve (2) are communicated with the priority port (P1.3) and the bypass port (P1.2) of the priority valve (1) in a one-to-one correspondence manner;
an oil return port (P4.1) of the directional valve (4) is communicated with an oil inlet (P5.1) of the one-way valve (5), and a plurality of working oil ports (P4.2, P4.4) of the directional valve (4) are communicated with a plurality of oil ports (TA, TB) of the steering actuator (L4) in a one-to-one correspondence manner;
an oil outlet (P5.2) of the one-way valve (5) is communicated with the oil inlet (P6.2) of the walking control device (6);
an oil inlet (P3.3) of the brake valve (3) is communicated with the oil inlet (P1.1) of the priority valve (1), a working oil port (P3.2) of the brake valve (3) is communicated with an oil port (BR) of the brake actuator (L3), and an oil drainage port (P3.1) of the brake valve (3) is communicated with an oil return port (P6.1) of the walking control device (6);
the oil return port (P6.1) of the walking control device (6) is communicated with the oil tank (T), and a plurality of oil ports (P6.3, P6.6, P6.4 and P6.5) of the walking control device (6) are communicated with a plurality of oil ports (F1, B1, B2 and F2) of the at least one walking motor (L1 and L2) in a one-to-one correspondence manner.
9. The hydraulic traveling system (200) according to claim 8, characterized in that the brake valve (3) is a pilot operated directional valve having a pilot operated port (P3.4), and the pilot operated port (P3.4) communicates with the oil inlet port (P6.2) of the traveling control device (6); or the brake valve (3) is an electric control directional valve, the electric control directional valve is provided with an electric control interface (P3.4), and the electric control interface (P3.4) is used for being connected with an electric control system; or the walking control device (6) is provided with a braking external control interface (P6.7), and the braking external control interface (P6.7) is communicated with the working oil port (P3.2) of the brake valve (3).
10. The hydraulic traveling system (200) according to claim 8, characterized in that the hydraulic traveling system (200) further includes: a second directional valve (7), a second overflow valve (8), a third overflow valve (9) and a third actuator (L5), wherein the second directional valve (7) connects the pressure oil source (P) to the oil inlet (P1.1) of the priority valve (1); wherein,
an oil inlet (P7.3) of the second directional valve (7) is communicated with the pressure oil source (P), an oil return port (P7.1) of the second directional valve (7) is communicated with the oil tank (T), a first working oil port (P7.2) of the second directional valve (7) is communicated with an oil port (LA) of the third actuator (L5), and a second working oil port (P7.4) of the second directional valve (7) is communicated with the oil inlet (P1.1) of the priority valve (1);
an oil inlet (P8.1) and an oil outlet (P8.2) of the second overflow valve (8) are communicated with the oil inlet (P7.3) and the oil return port (P7.1) of the second directional valve (7) in a one-to-one correspondence manner;
and an oil inlet (P9.1) and an oil outlet (P9.2) of the third overflow valve (9) are communicated with the first working oil port (P7.2) and the oil return port (P7.1) of the second directional valve (7) in a one-to-one correspondence manner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811491088.6A CN109340203B (en) | 2018-12-07 | 2018-12-07 | Hydraulic walking control system and hydraulic walking system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811491088.6A CN109340203B (en) | 2018-12-07 | 2018-12-07 | Hydraulic walking control system and hydraulic walking system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109340203A true CN109340203A (en) | 2019-02-15 |
| CN109340203B CN109340203B (en) | 2023-12-08 |
Family
ID=65297474
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811491088.6A Active CN109340203B (en) | 2018-12-07 | 2018-12-07 | Hydraulic walking control system and hydraulic walking system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109340203B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130133966A1 (en) * | 2010-05-13 | 2013-05-30 | Jinan Jenhang Energy-Saving Technology Co., Ltd. | Traveling hydraulic handling machine of energy-saving type |
| WO2015165344A1 (en) * | 2014-04-29 | 2015-11-05 | 三一汽车制造有限公司 | Rotary hydraulic system and concrete conveying pump apparatus |
| CN105217504A (en) * | 2015-10-27 | 2016-01-06 | 中国矿业大学 | Electro-hydraulic proportional control system of mining hydraulic winch |
| CN206397839U (en) * | 2016-12-20 | 2017-08-11 | 徐工消防安全装备有限公司 | Travelling control valve group, hydraulic closed running gear and aerial working platform vehicle |
| CN209586820U (en) * | 2018-12-07 | 2019-11-05 | 湖南十开科技有限公司 | Hydraulic moving control system and hydraulic travel system |
-
2018
- 2018-12-07 CN CN201811491088.6A patent/CN109340203B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130133966A1 (en) * | 2010-05-13 | 2013-05-30 | Jinan Jenhang Energy-Saving Technology Co., Ltd. | Traveling hydraulic handling machine of energy-saving type |
| WO2015165344A1 (en) * | 2014-04-29 | 2015-11-05 | 三一汽车制造有限公司 | Rotary hydraulic system and concrete conveying pump apparatus |
| CN105217504A (en) * | 2015-10-27 | 2016-01-06 | 中国矿业大学 | Electro-hydraulic proportional control system of mining hydraulic winch |
| CN206397839U (en) * | 2016-12-20 | 2017-08-11 | 徐工消防安全装备有限公司 | Travelling control valve group, hydraulic closed running gear and aerial working platform vehicle |
| CN209586820U (en) * | 2018-12-07 | 2019-11-05 | 湖南十开科技有限公司 | Hydraulic moving control system and hydraulic travel system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109340203B (en) | 2023-12-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103047207B (en) | Flow dividing and combining valve bank, hydraulic system, load sensitive hydraulic system and engineering machinery | |
| US9533704B2 (en) | Electric-control multimode steering valve, steering hydraulic control system, and wheel type crane | |
| CN102951198B (en) | A kind of vehicle and fluid-link steering drive system | |
| CN102995680B (en) | Hydraulic bucket rod control circuit for hydraulic excavating machine | |
| CN106481605B (en) | A kind of road roller hydraulic system and road roller | |
| CN104828135A (en) | Hydraulic control system and mining dump truck with same | |
| US4190130A (en) | Dual steering system for off-highway vehicles | |
| CN109017981B (en) | Walking machine and hydraulic steering system thereof | |
| CN209586820U (en) | Hydraulic moving control system and hydraulic travel system | |
| CN205559384U (en) | Two system control module of hydraulic pressure | |
| CN109340203A (en) | Hydraulic moving control system and hydraulic travel system | |
| CN103511379B (en) | A kind of crane, hydraulic system and switching valve | |
| DE102013113206A1 (en) | Battery-powered industrial truck | |
| CN213088358U (en) | Hydraulic system of electrically-driven overhead working truck | |
| CN112963399A (en) | Steering and walking hydraulic control system of scissor-fork type aerial work platform | |
| CN104692254A (en) | Crane secondary ascension downslide prevention system | |
| CN103541935B (en) | Hydraulic system and vehicle comprising same | |
| CN106762907B (en) | A kind of engineering machinery hydraulic oil return control loop and its control method | |
| CN205315377U (en) | Steering control valve | |
| CN109306978B (en) | Hydraulic walking control unit and hydraulic walking system | |
| CN203428833U (en) | Engineering vehicle and winch hydraulic system thereof | |
| CN219013030U (en) | High-altitude operation car switching cartridge valve group | |
| CN219139515U (en) | Hydraulic steering valve group, hydraulic steering system and tractor | |
| CN214998523U (en) | Hydraulic emergency system | |
| CN209906248U (en) | Integrated rotary drilling rig main winch balance valve device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |