CN114838024A - Bypass load sensing multi-way reversing valve hydraulic system - Google Patents

Bypass load sensing multi-way reversing valve hydraulic system Download PDF

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Publication number
CN114838024A
CN114838024A CN202110142057.5A CN202110142057A CN114838024A CN 114838024 A CN114838024 A CN 114838024A CN 202110142057 A CN202110142057 A CN 202110142057A CN 114838024 A CN114838024 A CN 114838024A
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China
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valve
oil
way reversing
reversing valve
pressure compensation
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CN202110142057.5A
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Chinese (zh)
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申忠玉
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Individual
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Priority to CN202110142057.5A priority Critical patent/CN114838024A/en
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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
    • 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
    • F15B13/16—Special measures for feedback, e.g. by a follow-up device
    • 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
    • F15B21/001—Servomotor systems with fluidic control
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/50—Pressure control
    • F15B2211/515—Pressure control characterised by the connections of the pressure control means in the circuit
    • F15B2211/5156—Pressure control characterised by the connections of the pressure control means in the circuit being connected to a return line and a directional control valve
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/50—Pressure control
    • F15B2211/52—Pressure control characterised by the type of actuation
    • F15B2211/528—Pressure control characterised by the type of actuation actuated by fluid pressure
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/65—Methods of control of the load sensing pressure
    • F15B2211/651—Methods of control of the load sensing pressure characterised by the way the load pressure is communicated to the load sensing circuit
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/80—Other types of control related to particular problems or conditions
    • F15B2211/88—Control measures for saving energy

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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)
  • Operation Control Of Excavators (AREA)

Abstract

A hydraulic system of a bypass load sensing multi-way reversing valve comprises a multi-way reversing valve, a bypass oil way, a pressure compensation valve and the like. When each multi-way reversing valve does not work, the oil is returned by the bypass oil way to realize the low-pressure standby work of the system. When the multi-way reversing valve works, oil return of the bypass oil way is gradually cut off, and the multi-way reversing valve works, so that low-pressure oil return through the bypass oil way is realized when the multi-way reversing valve hydraulic system does not work, and oil is supplied to the multi-way reversing valve according to load induction pressure in a proportionally shunting manner during working.

Description

Bypass load sensing multi-way reversing valve hydraulic system
Technical Field
The invention relates to a load sensing multi-way reversing valve hydraulic system, in particular to a bypass load sensing multi-way reversing valve hydraulic system.
Background
At present, a load sensing multi-way reversing valve hydraulic system for engineering machinery such as excavators and loaders and agricultural and forestry machinery in the market has high standby pressure and consumes energy. Therefore, the market urgently needs a bypass load sensing multi-way reversing valve hydraulic system: when each multi-way reversing valve unit does not work, the bypass oil way oil return realizes low-pressure standby work of the system, when the multi-way reversing valve unit works, the bypass oil way oil return is gradually cut off, and the multi-way reversing valve works, so that low-pressure oil return through the bypass oil way is realized when the multi-way reversing valve hydraulic system does not work, and oil is supplied to the multi-way reversing valve unit in a manner of proportionally shunting according to load induction pressure during work.
Disclosure of Invention
The invention aims to realize low-pressure standby operation of a system by the oil return of a bypass oil way when each multi-way reversing valve of a bypass load induction multi-way reversing valve hydraulic system for engineering machinery such as excavators, loaders and the like and agricultural machinery does not work, and ensure that the oil return of the bypass oil way is gradually cut off when the multi-way reversing valve works, so that the multi-way reversing valve works, low-pressure oil return through the bypass oil way when the multi-way reversing valve hydraulic system does not work is realized, and the oil is proportionally supplied to the multi-way reversing valve according to load induction pressure during working.
A bypass load sensing multi-way reversing valve hydraulic system is characterized in that: the pressure and flow control of the bypass load sensing multi-way reversing valve hydraulic system is completed by a bypass loop and a load sensing pressure compensation valve loop together, and comprises a multi-way reversing valve I (1), a multi-way reversing valve II (2), a multi-way reversing valve I (3), a multi-way reversing valve II (4), a pressure compensation valve I (5), a pressure compensation valve II (6), a multi-way reversing valve I (7), a multi-way reversing valve II (8), a multi-way reversing valve I (9), a multi-way reversing valve II (10), a multi-way reversing valve II (11), a multi-way reversing valve II (12), a multi-way reversing valve II (13), a multi-way reversing valve II (14) and a pressure compensation valve I (15), a pressure compensation valve two oil inlet channel (16), a pressure compensation valve one oil outlet channel (17), a pressure compensation valve two oil outlet channel (18), a pressure compensation valve one load sensing oil outlet (19), a pressure compensation valve two load sensing oil outlet (20), a multi-way reversing valve connected with a bypass oil inlet channel (21), a multi-way reversing valve connected with a two bypass oil inlet channel (22), a bypass valve (23), a bypass valve oil inlet (24), a bypass valve oil outlet (25), a bypass valve spring (26), a bypass valve control force (27), an oil inlet pressure compensation valve (28), an oil inlet pressure compensation valve spring (29), an oil inlet pressure compensation valve oil inlet (30), an oil inlet pressure compensation valve oil outlet (31), an oil inlet pressure compensation valve control oil port (32), a main oil inlet (33), a load sensing oil port (34), a main oil return port (35), and a multi-way reversing valve connected with a load oil port one (36), the multi-way reversing valve is connected with a load oil port II (37), the multi-way reversing valve is connected with a load oil port I (38), the multi-way reversing valve is connected with a load oil port II (39), the multi-way reversing valve is connected with a load oil port I (1) and a multi-way reversing valve II (2) in parallel, the multi-way reversing valve is connected with a valve core (3) and a pressure compensation valve I (5) on the multi-way reversing valve I (1), the multi-way reversing valve is connected with a valve core (4) and a pressure compensation valve II (6) on the multi-way reversing valve II (2), the multi-way reversing valve is connected with an oil inlet channel (7) and a multi-way reversing valve II oil inlet channel (8) and a main oil inlet (33), the multi-way reversing valve is connected with a pressure compensation oil inlet channel (9) and a pressure compensation valve I oil outlet channel (17), the multi-way reversing valve is connected with an oil return channel II (10) and a pressure compensation valve II oil outlet channel (18), the multi-way reversing valve is connected with a pressure compensation oil inlet channel (11) and a main oil outlet (12) and a main oil return channel (35), a bypass oil outlet channel (13) of a multi-way directional valve is communicated with a main oil return port (35), a bypass oil outlet channel (14) of a multi-way directional valve is communicated with a bypass oil inlet channel (21), a bypass oil inlet channel (22) of a multi-way directional valve is communicated with a main oil inlet (33), a load sensing oil outlet (19) of a pressure compensation valve and a load sensing oil outlet (20) of a pressure compensation valve are communicated with a load sensing oil port (34), a bypass valve oil inlet (24) is communicated with a main oil inlet (33), a bypass valve oil outlet (25) is communicated with the main oil return port (35), a bypass valve spring (26) is arranged on the right side of the bypass valve (23), a bypass valve control force (27) acts on the left side of the bypass valve (23), an oil inlet pressure compensation valve spring (29) is arranged on the right side of the oil inlet pressure compensation valve (28), and an oil inlet (30) of the oil inlet pressure compensation valve is communicated with the main oil inlet (33), an oil outlet (31) of an oil inlet pressure compensation valve is communicated with a main oil return port (35), an oil inlet pressure compensation valve control oil port (32) is communicated with a load sensing oil port (34), a multi-way reversing valve is connected with a load oil port I (36) and a multi-way reversing valve is connected with a load oil port II (37) on the multi-way reversing valve I (1), the multi-way reversing valve is connected with a load oil port I (38) and the multi-way reversing valve is connected with a load oil port II (39) on the multi-way reversing valve II (2), when oil is fed into a main oil inlet (33) and the multi-way reversing valves are not operated, hydraulic oil passes through the multi-way reversing valve II bypass oil inlet channel (22), the multi-way reversing valve II valve core (4), the multi-way reversing valve II bypass oil inlet channel (14), the multi-way reversing valve II bypass oil inlet channel (21), the multi-way reversing valve I valve core (3), the multi-way reversing valve bypass oil outlet channel (13) and the main oil return port (35), under the action of a bypass valve spring (26), a bypass valve oil inlet (24) is communicated with a bypass valve oil outlet (25) through a bypass valve (23) and then communicated with a main oil return port (35) for oil return, low-pressure standby work of the system is realized, when oil enters a main oil inlet (33) and a multi-way reversing valve is connected with a main oil return port (1) for work, a multi-way reversing valve is connected with a valve core (3) to move, a bypass oil outlet channel (13) of the multi-way reversing valve and a bypass oil inlet channel (21) of the multi-way reversing valve are connected with each other to be gradually cut off, meanwhile, a bypass valve control force (27) is applied to the left side of the bypass valve (23) to overcome the force of the bypass valve spring (26) to enable the valve core of the bypass valve (23) to move right to gradually close an oil return channel of the bypass valve oil inlet (24), namely, the channel of a main oil inlet (33) and the main oil return port (35) is gradually cut off, hydraulic oil enters an oil inlet channel (15) of a pressure compensation valve through an oil inlet channel (7) of the multi-way reversing valve, the first pressure compensation valve (5) starts to work, pressure oil is output to the first pressure compensation oil outlet channel (17) of the first pressure compensation valve and is connected with the first pressure compensation oil inlet channel (9) of the multi-way reversing valve and is supplied to the first load oil port (1) of the multi-way reversing valve through the first valve core (3) of the multi-way reversing valve, oil pressure is provided for the first load sensing oil outlet (19) of the first pressure compensation valve, the second load sensing oil outlet (20) of the second pressure compensation valve, the control oil port (32) of the oil inlet pressure compensation valve and the load sensing oil port (34), pressure of the first pressure compensation valve oil outlet channel (17) of the first pressure compensation valve and the first load sensing oil outlet (19) of the first pressure compensation valve is determined by the load size of the first load oil port (1) of the multi-way reversing valve, pressure of the first load sensing oil outlet (19) of the pressure compensation valve acts on the lower ends of the first pressure compensation valve (5) and the second pressure compensation valve (6), pressure of the oil inlet pressure compensation valve (30) of the oil inlet pressure compensation valve and the control oil inlet pressure oil port (32) of the oil inlet pressure compensation valve The oil inlet pressure compensation valve (28) starts to work under the combined action of the force of the pressure compensation valve spring (29), the working principle of the multi-way reversing valve unit I (2) is the same as that of the multi-way reversing valve unit I (1), when the multi-way reversing valve unit I (1) and the multi-way reversing valve unit I (2) work simultaneously, the pressure of the load sensing oil port (34) is the maximum load sensing pressure and acts on the lower ends of the two pressure compensation valves, oil is supplied to the multi-way reversing valve unit in a proportionally shunting manner, accordingly, low-pressure oil return through a bypass oil way is achieved when a hydraulic system of the multi-way reversing valve does not work, and oil is supplied to the multi-way reversing valve unit in a proportionally shunting manner according to the load sensing pressure during work.
Description of the drawings:
the invention is described in further detail below with reference to the following figures and embodiments:
fig. 1 is a schematic structural diagram of a bypass load sensing multiple directional control valve hydraulic system.
FIG. 2 is a schematic structural diagram of a bypass oil path only comprising a multi-way reversing valve and a bypass oil path.
Fig. 3 is a schematic structural diagram of a bypass oil path only with a bypass valve.
Detailed Description
Example one FIG. 1
The bypass load sensing multi-way reversing valve hydraulic system is characterized in that: the pressure and flow control of the bypass load sensing multi-way reversing valve hydraulic system is completed by a bypass loop and a load sensing pressure compensation valve loop together, and comprises a multi-way reversing valve I (1), a multi-way reversing valve II (2), a multi-way reversing valve I (3), a multi-way reversing valve II (4), a pressure compensation valve I (5), a pressure compensation valve II (6), a multi-way reversing valve I (7), a multi-way reversing valve II (8), a multi-way reversing valve I (9), a multi-way reversing valve II (10), a multi-way reversing valve II (11), a multi-way reversing valve II (12), a multi-way reversing valve II (13), a multi-way reversing valve II (14) and a pressure compensation valve I (15), a pressure compensation valve two oil inlet channel (16), a pressure compensation valve one oil outlet channel (17), a pressure compensation valve two oil outlet channel (18), a pressure compensation valve one load sensing oil outlet (19), a pressure compensation valve two load sensing oil outlet (20), a multi-way reversing valve connected with a bypass oil inlet channel (21), a multi-way reversing valve connected with a two bypass oil inlet channel (22), a bypass valve (23), a bypass valve oil inlet (24), a bypass valve oil outlet (25), a bypass valve spring (26), a bypass valve control force (27), an oil inlet pressure compensation valve (28), an oil inlet pressure compensation valve spring (29), an oil inlet pressure compensation valve oil inlet (30), an oil inlet pressure compensation valve oil outlet (31), an oil inlet pressure compensation valve control oil port (32), a main oil inlet (33), a load sensing oil port (34), a main oil return port (35), and a multi-way reversing valve connected with a load oil port one (36), the multiple directional control valve is connected with a second load oil port (37), the multiple directional control valve is connected with a first load oil port (38), and the multiple directional control valve is connected with a second load oil port (39).
Wherein, the multi-way reversing valve is connected with a first (1) and a second (2) in parallel, the multi-way reversing valve is connected with a first valve core (3) and a first pressure compensation valve (5) on the first multi-way reversing valve (1), the multi-way reversing valve is connected with a second valve core (4) and a second pressure compensation valve (6) on the second multi-way reversing valve (2), the multi-way reversing valve is connected with a first oil inlet channel (7) and a second oil inlet channel (8) of the multi-way reversing valve and communicated with a main oil inlet (33), the multi-way reversing valve is connected with a first pressure compensation oil inlet channel (9) and communicated with a first pressure compensation valve oil outlet channel (17), the multi-way reversing valve is connected with a second pressure compensation oil inlet channel (10) and communicated with a second pressure compensation valve oil outlet channel (18), the multi-way reversing valve is connected with a first oil return channel (11) and a second oil return channel (12) of the multi-way reversing valve and communicated with a main oil return port (35), and the multi-way reversing valve is connected with a bypass oil outlet channel (13) and communicated with a main oil return port (35), a multi-way reversing valve and two bypass oil outlet channel (14) is communicated with a multi-way reversing valve and one bypass oil inlet channel (21), a multi-way reversing valve and two bypass oil inlet channel (22) is communicated with a main oil inlet (33), a pressure compensation valve and two load sensing oil outlets (19, 20) are communicated with a load sensing oil port (34), a bypass valve oil inlet (24) is communicated with the main oil inlet (33), a bypass valve oil outlet (25) is communicated with a main oil return port (35), a bypass valve spring (26) is arranged on the right side of the bypass valve (23), a bypass valve control force (27) acts on the left side of the bypass valve (23), an oil inlet pressure compensation valve spring (29) is arranged on the right side of the oil inlet pressure compensation valve (28), an oil inlet (30) of the oil inlet pressure compensation valve is communicated with the main oil inlet (33), an oil outlet (31) of the oil inlet pressure compensation valve is communicated with the main oil return port (35), an oil inlet pressure compensating valve control oil port (32) is communicated with a load sensing oil port (34), a multi-way reversing valve is connected with a load oil port I (36) and a multi-way reversing valve is connected with a load oil port II (37) on a multi-way reversing valve I (1), the multi-way reversing valve is connected with a load oil port I (38) and a multi-way reversing valve is connected with a load oil port II (39) on a multi-way reversing valve II (2), when the oil inlet of a main oil inlet (33) and each multi-way reversing valve do not work, hydraulic oil passes through a multi-way reversing valve II bypass oil inlet channel (22) and a multi-way reversing valve II valve core (4) and a multi-way reversing valve II bypass oil outlet channel (14) and the multi-way reversing valve II valve I (3) and the multi-way reversing valve II valve I bypass oil channel (13) and a main oil return port (35) and is communicated with a bypass valve (26), an oil inlet (24) of the bypass valve is communicated with an oil outlet (25) of the bypass valve through a bypass valve (23) and then communicated with a main oil return port (35) for returning oil, low-pressure standby work of the system is realized, when oil enters a main oil inlet (33) and a multi-way reversing valve is connected with a valve core (3) for working, the multi-way reversing valve is connected with a bypass oil outlet channel (13) and a bypass oil inlet channel (21) of the multi-way reversing valve through movement, a channel of the multi-way reversing valve connected with a bypass oil outlet channel (13) and a bypass oil inlet channel (21) is gradually cut off, meanwhile, a bypass valve control force (27) is applied to the left side of the bypass valve (23) to overcome the force of a bypass valve spring (26) to enable the valve core of the bypass valve (23) to move rightwards to gradually close an oil return channel of the bypass valve (24), namely, the channel of the main oil inlet (33) and the main oil return port (35) is gradually cut off, hydraulic oil enters an oil inlet channel (7) of a pressure compensation valve through the multi-way reversing valve connected with an oil inlet channel (15), the first pressure compensation valve (5) starts to work, pressure oil is output to the first pressure compensation oil outlet channel (17) of the first pressure compensation valve and is connected with the first pressure compensation oil inlet channel (9) of the multi-way reversing valve and is supplied to the first load oil port (1) of the multi-way reversing valve through the first valve core (3) of the multi-way reversing valve, oil pressure is provided for the first load sensing oil outlet (19) of the first pressure compensation valve, the second load sensing oil outlet (20) of the second pressure compensation valve, the control oil port (32) of the oil inlet pressure compensation valve and the load sensing oil port (34), pressure of the first pressure compensation valve oil outlet channel (17) of the first pressure compensation valve and the first load sensing oil outlet (19) of the first pressure compensation valve is determined by the load size of the first load oil port (1) of the multi-way reversing valve, pressure of the first load sensing oil outlet (19) of the pressure compensation valve acts on the lower ends of the first pressure compensation valve (5) and the second pressure compensation valve (6), pressure of the oil inlet pressure compensation valve (30) of the oil inlet pressure compensation valve and the control oil inlet pressure oil port (32) of the oil inlet pressure compensation valve The oil inlet pressure compensation valve (28) starts to work under the combined action of the force of the pressure compensation valve spring (29), the working principle of the multi-way reversing valve unit I (2) is the same as that of the multi-way reversing valve unit I (1), when the multi-way reversing valve unit I (1) and the multi-way reversing valve unit I (2) work simultaneously, the pressure of the load sensing oil port (34) is the maximum load sensing pressure and acts on the lower ends of the two pressure compensation valves, oil is supplied to the multi-way reversing valve unit in a proportionally shunting manner, accordingly, low-pressure oil return through a bypass oil way is achieved when a hydraulic system of the multi-way reversing valve does not work, and oil is supplied to the multi-way reversing valve unit in a proportionally shunting manner according to the load sensing pressure during work.
Second embodiment FIG. 2
The bypass load sensing multi-way reversing valve hydraulic system is characterized in that: the pressure and flow control of the bypass load sensing multi-way reversing valve hydraulic system is completed by a bypass loop and a load sensing pressure compensation valve loop together, and comprises a multi-way reversing valve I (1), a multi-way reversing valve II (2), a multi-way reversing valve I (3), a multi-way reversing valve II (4), a pressure compensation valve I (5), a pressure compensation valve II (6), a multi-way reversing valve I (7), a multi-way reversing valve II (8), a multi-way reversing valve I (9), a multi-way reversing valve II (10), a multi-way reversing valve II (11), a multi-way reversing valve II (12), a multi-way reversing valve II (13), a multi-way reversing valve II (14) and a pressure compensation valve I (15), the oil-feeding device comprises a pressure compensation valve two-oil inlet channel (16), a pressure compensation valve one-oil outlet channel (17), a pressure compensation valve two-oil outlet channel (18), a pressure compensation valve one-load sensing oil outlet (19), a pressure compensation valve two-load sensing oil outlet (20), a multi-way reversing valve connected with a bypass oil inlet channel (21), a multi-way reversing valve connected with a two-bypass oil inlet channel (22), an oil-feeding pressure compensation valve (28), an oil-feeding pressure compensation valve spring (29), an oil-feeding pressure compensation valve oil inlet (30), an oil-feeding pressure compensation valve oil outlet (31), an oil-feeding pressure compensation valve control oil port (32), a main oil inlet (33), a load sensing oil port (34), a main oil return port (35), a multi-way reversing valve connected with a load oil port one (36), a multi-way reversing valve connected with a load oil port two (37), a multi-way reversing valve connected with a two-load oil port one (38), and a multi-way reversing valve connected with a two-load oil port two (39).
Wherein, the multi-way reversing valve is connected with a first (1) and a second (2) in parallel, the multi-way reversing valve is connected with a first valve core (3) and a first pressure compensation valve (5) on the first multi-way reversing valve (1), the multi-way reversing valve is connected with a second valve core (4) and a second pressure compensation valve (6) on the second multi-way reversing valve (2), the multi-way reversing valve is connected with a first oil inlet channel (7) and a second oil inlet channel (8) of the multi-way reversing valve and communicated with a main oil inlet (33), the multi-way reversing valve is connected with a first pressure compensation oil inlet channel (9) and communicated with a first pressure compensation valve oil outlet channel (17), the multi-way reversing valve is connected with a second pressure compensation oil inlet channel (10) and communicated with a second pressure compensation valve oil outlet channel (18), the multi-way reversing valve is connected with a first oil return channel (11) and a second oil return channel (12) of the multi-way reversing valve and communicated with a main oil return port (35), and the multi-way reversing valve is connected with a bypass oil outlet channel (13) and communicated with a main oil return port (35), the multi-way reversing valve and two bypass oil outlet channels (14) are communicated with a multi-way reversing valve and two bypass oil inlet channels (21), the multi-way reversing valve and two bypass oil inlet channels (22) are communicated with a main oil inlet (33), a first load sensing oil outlet (19) of a pressure compensation valve and a second load sensing oil outlet (20) of the pressure compensation valve are communicated with a load sensing oil port (34), an oil inlet pressure compensation valve spring (29) is arranged on the right side of the oil inlet pressure compensation valve (28), an oil inlet pressure compensation valve oil inlet (30) is communicated with the main oil inlet (33), an oil outlet (31) of the oil inlet pressure compensation valve is communicated with a main oil return port (35), an oil inlet pressure compensation valve control oil port (32) is communicated with the load sensing oil port (34), the multi-way reversing valve and one load one (36) are connected with the multi-way reversing valve and one load oil port two (37) are arranged on the multi-way reversing valve and one oil return port (1), and the multi-way reversing valve and the two load oil port (38) are connected on the multi-way reversing valve and two load oil return port (39) and the multi-way reversing valve When the oil inlet of a main oil inlet (33) and each multi-way reversing valve linkage do not work, hydraulic oil is communicated with a bypass oil inlet channel (21) and a multi-way reversing valve linkage one spool (3) and the multi-way reversing valve linkage one outlet channel (13) and a main oil return port (35) through a multi-way reversing valve linkage two bypass oil inlet channel (22), a multi-way reversing valve linkage two spool (4), a multi-way reversing valve linkage two bypass oil outlet channel (14) and the multi-way reversing valve linkage one inlet channel (21) and the multi-way reversing valve linkage one spool (3) and the multi-way reversing valve linkage one outlet channel (13) to realize low-pressure standby operation of the system, when the oil inlet of the main oil inlet (33) and the multi-way reversing valve linkage one spool (1) work, the multi-way reversing valve linkage one spool (3) moves to communicate the bypass oil outlet channel (13) and the oil inlet channel (21) of the multi-way reversing valve linkage one inlet channel (7) to gradually cut off the passage of the main oil inlet channel (33) and the multi-way reversing valve linkage one inlet channel (15) to compensate the pressure The first pressure compensation valve (5) starts to work, pressure oil is output to the first pressure compensation oil outlet channel (17) of the first pressure compensation valve and is connected with the first pressure compensation oil inlet channel (9) of the multi-way reversing valve and is supplied to the first load oil port (1) of the multi-way reversing valve through the first valve core (3) of the multi-way reversing valve and is simultaneously provided with oil pressure through the first load sensing oil outlet (19) of the first pressure compensation valve, the second load sensing oil outlet (20) of the second pressure compensation valve, the control oil port (32) of the oil inlet pressure compensation valve and the load sensing oil port (34), the pressure of the first pressure compensation valve oil outlet channel (17) of the first pressure compensation valve and the first load sensing oil outlet (19) of the first pressure compensation valve is determined by the load size of the first load oil port (1) of the multi-way reversing valve, the pressure of the first load sensing oil outlet (19) of the pressure compensation valve acts on the lower ends of the first pressure compensation valve (5) of the first pressure compensation valve and the second pressure compensation valve (6), and the pressure compensation valve controls the pressure and the oil inlet of the oil inlet pressure compensation valve (30) of the oil inlet pressure compensation valve The oil pressure compensation valve (28) starts to work under the combined action of the force of the oil pressure compensation valve spring (29), the working principle of the multi-way reversing valve unit I (2) is the same as that of the multi-way reversing valve unit I (1), when the multi-way reversing valve unit I (1) and the multi-way reversing valve unit II (2) work simultaneously, the pressure of the load sensing oil port (34) is the maximum load sensing pressure and acts on the lower ends of the two pressure compensation valves, oil is supplied to the multi-way reversing valve unit in a proportionally shunting manner, accordingly, low-pressure oil return through a bypass oil way is achieved when a hydraulic system of the multi-way reversing valve does not work, and oil is supplied to the multi-way reversing valve unit in a proportionally shunting manner according to the load sensing pressure during work.
Example III FIG. 3
The bypass load sensing multi-way reversing valve hydraulic system is characterized in that: the pressure and flow control of the bypass load sensing multi-way reversing valve hydraulic system is completed by a bypass loop and a load sensing pressure compensation valve loop together, and comprises a multi-way reversing valve I (1), a multi-way reversing valve II (2), a multi-way reversing valve I (3), a multi-way reversing valve II (4), a pressure compensation valve I (5), a pressure compensation valve II (6), a multi-way reversing valve I (7), a multi-way reversing valve II (8), a multi-way reversing valve I (9), a multi-way reversing valve II (10), a multi-way reversing valve II (11), a multi-way reversing valve II (12), a pressure compensation valve I (15), a pressure compensation valve II (16), a pressure compensation valve I (17) and a pressure compensation valve II (18), the hydraulic control system comprises a first load sensing oil outlet (19) of a pressure compensation valve, a second load sensing oil outlet (20) of the pressure compensation valve, a bypass valve (23), a bypass valve oil inlet (24), a bypass valve oil outlet (25), a bypass valve spring (26), a bypass valve control force (27), an oil inlet pressure compensation valve (28), an oil inlet pressure compensation valve spring (29), an oil inlet pressure compensation valve oil inlet (30), an oil inlet pressure compensation valve oil outlet (31), an oil inlet pressure compensation valve control oil port (32), a total oil inlet (33), a load sensing oil port (34), a total oil return port (35), a multi-way reversing valve connected with a first load oil port (36), a multi-way reversing valve connected with a second load oil port (37), a multi-way reversing valve connected with a first load oil port (38) and a multi-way reversing valve connected with a second load oil port (39).
Wherein, the multi-way reversing valve is connected with a first oil inlet (1) and a second oil inlet (2) in parallel, the multi-way reversing valve is connected with a first valve core (3) and a first pressure compensation valve (5) on the first multi-way reversing valve (1), the multi-way reversing valve is connected with a second valve core (4) and a second pressure compensation valve (6) on the second multi-way reversing valve (2), the multi-way reversing valve is connected with a first oil inlet channel (7) and a second oil inlet channel (8) of the multi-way reversing valve and communicated with a main oil inlet (33), the multi-way reversing valve is connected with a first pressure compensation oil inlet channel (9) and communicated with a first pressure compensation valve oil outlet channel (17), the multi-way reversing valve is connected with a second pressure compensation oil inlet channel (10) and communicated with a second pressure compensation valve oil outlet channel (18), the multi-way reversing valve is connected with a first oil return channel (11) and a second oil return channel (12) of the multi-way reversing valve and communicated with a main oil return (35), the first pressure compensation valve (19) and a second pressure compensation oil outlet (34) are communicated with a load sensing oil port (34), a bypass valve oil inlet (24) is communicated with a main oil inlet (33), a bypass valve oil outlet (25) is communicated with a main oil return port (35), a bypass valve spring (26) is arranged on the right side of the bypass valve (23), a bypass valve control force (27) acts on the left side of the bypass valve (23), an oil inlet pressure compensation valve spring (29) is arranged on the right side of an oil inlet pressure compensation valve (28), an oil inlet (30) of the oil inlet pressure compensation valve is communicated with the main oil inlet (33), an oil outlet (31) of the oil inlet pressure compensation valve is communicated with the main oil return port (35), an oil inlet pressure compensation valve control oil port (32) is communicated with a load sensing oil port (34), a multi-way reversing valve is connected with a load oil port I (36) and a multi-way reversing valve connected with a load oil port II (37) on a multi-way reversing valve connected I (1), the multi-way reversing valve is connected with a load oil port I (38) and a multi-way reversing valve connected with a load oil port II (39) on a multi-way reversing valve connected II (2), when oil enters a main oil inlet (33) and each multi-way reversing valve does not work, under the action of a bypass valve spring (26), a bypass valve oil inlet (24) is communicated with a bypass valve oil outlet (25) through a bypass valve (23) and then communicated with a main oil return port (35) for returning oil, low-pressure standby work of the system is realized, when the oil enters the main oil inlet (33) and the multi-way reversing valve (1) works, a bypass valve control force (27) acts on the left side of the bypass valve (23) to overcome the force of the bypass valve spring (26) so that a valve core of the bypass valve (23) is moved right to gradually close an oil return channel of the bypass valve oil inlet (24), the channel between the main oil inlet (33) and the main oil return port (35) is gradually cut off, hydraulic oil enters an oil inlet channel (15) of a pressure compensation valve through an oil inlet channel (7) of the multi-way reversing valve combination, the pressure compensation valve (5) starts to work, and pressure oil is output to a pressure compensation oil channel (17) of the multi-way reversing valve combination (9) The oil is supplied to a load oil port of a multi-way reversing valve combination I (1) through a multi-way reversing valve combination I valve core (3), oil pressure is provided for a load sensing oil outlet (19) of a pressure compensation valve I and a load sensing oil outlet (20) of a pressure compensation valve II, an oil inlet pressure compensation valve control oil port (32) and a load sensing oil port (34), the pressure of an oil outlet channel (17) of the pressure compensation valve I and the load sensing oil outlet (19) of the pressure compensation valve I is determined by the load of the load oil port of the multi-way reversing valve combination I (1), the pressure of the load sensing oil outlet (19) of the pressure compensation valve I is acted on the lower ends of the pressure compensation valve I (5) and the pressure compensation valve II (6), the pressure compensation valve (28) starts to work under the combined action of the oil pressure from an oil inlet (30) of the oil inlet pressure compensation valve and the oil inlet pressure compensation valve control oil port (32) and the force of an oil inlet pressure compensation valve spring (29), the working principle of the multi-way reversing valve unit II (2) is the same as that of the multi-way reversing valve unit I (1), when the multi-way reversing valve unit I (1) and the multi-way reversing valve unit II (2) work simultaneously, the pressure of the load sensing oil port (34) is the maximum load sensing pressure and acts on the lower ends of the two pressure compensation valves, the multi-way reversing valve unit is supplied with oil in a proportionally-divided manner, therefore, low-pressure oil return through a bypass oil way when a multi-way reversing valve hydraulic system does not work is realized, and the multi-way reversing valve unit is supplied with oil in a proportionally-divided manner according to the load sensing pressure during work.

Claims (3)

1. A bypass load sensing multi-way reversing valve hydraulic system is characterized in that: the pressure and flow control of the bypass load sensing multi-way reversing valve hydraulic system is completed by a bypass loop and a load sensing pressure compensation valve loop together, and comprises a multi-way reversing valve I (1), a multi-way reversing valve II (2), a multi-way reversing valve I (3), a multi-way reversing valve II (4), a pressure compensation valve I (5), a pressure compensation valve II (6), a multi-way reversing valve I (7), a multi-way reversing valve II (8), a multi-way reversing valve I (9), a multi-way reversing valve II (10), a multi-way reversing valve II (11), a multi-way reversing valve II (12), a multi-way reversing valve II (13), a multi-way reversing valve II (14) and a pressure compensation valve I (15), a pressure compensation valve two oil inlet channel (16), a pressure compensation valve one oil outlet channel (17), a pressure compensation valve two oil outlet channel (18), a pressure compensation valve one load sensing oil outlet (19), a pressure compensation valve two load sensing oil outlet (20), a multi-way reversing valve connected with a bypass oil inlet channel (21), a multi-way reversing valve connected with a two bypass oil inlet channel (22), a bypass valve (23), a bypass valve oil inlet (24), a bypass valve oil outlet (25), a bypass valve spring (26), a bypass valve control force (27), an oil inlet pressure compensation valve (28), an oil inlet pressure compensation valve spring (29), an oil inlet pressure compensation valve oil inlet (30), an oil inlet pressure compensation valve oil outlet (31), an oil inlet pressure compensation valve control oil port (32), a main oil inlet (33), a load sensing oil port (34), a main oil return port (35), and a multi-way reversing valve connected with a load oil port one (36), the multi-way reversing valve is connected with a load oil port II (37), the multi-way reversing valve is connected with a load oil port I (38), the multi-way reversing valve is connected with a load oil port II (39), the multi-way reversing valve is connected with a load oil port I (1) and a multi-way reversing valve II (2) in parallel, the multi-way reversing valve is connected with a valve core (3) and a pressure compensation valve I (5) on the multi-way reversing valve I (1), the multi-way reversing valve is connected with a valve core (4) and a pressure compensation valve II (6) on the multi-way reversing valve II (2), the multi-way reversing valve is connected with an oil inlet channel (7) and a multi-way reversing valve II oil inlet channel (8) and a main oil inlet (33), the multi-way reversing valve is connected with a pressure compensation oil inlet channel (9) and a pressure compensation valve I oil outlet channel (17), the multi-way reversing valve is connected with an oil return channel II (10) and a pressure compensation valve II oil outlet channel (18), the multi-way reversing valve is connected with a pressure compensation oil inlet channel (11) and a main oil outlet (12) and a main oil return channel (35), a bypass oil outlet channel (13) of a multi-way directional valve is communicated with a main oil return port (35), a bypass oil outlet channel (14) of a multi-way directional valve is communicated with a bypass oil inlet channel (21), a bypass oil inlet channel (22) of a multi-way directional valve is communicated with a main oil inlet (33), a load sensing oil outlet (19) of a pressure compensation valve and a load sensing oil outlet (20) of a pressure compensation valve are communicated with a load sensing oil port (34), a bypass valve oil inlet (24) is communicated with a main oil inlet (33), a bypass valve oil outlet (25) is communicated with the main oil return port (35), a bypass valve spring (26) is arranged on the right side of the bypass valve (23), a bypass valve control force (27) acts on the left side of the bypass valve (23), an oil inlet pressure compensation valve spring (29) is arranged on the right side of the oil inlet pressure compensation valve (28), and an oil inlet (30) of the oil inlet pressure compensation valve is communicated with the main oil inlet (33), an oil outlet (31) of an oil inlet pressure compensation valve is communicated with a main oil return port (35), an oil inlet pressure compensation valve control oil port (32) is communicated with a load sensing oil port (34), a multi-way reversing valve is connected with a load oil port I (36) and a multi-way reversing valve is connected with a load oil port II (37) on the multi-way reversing valve I (1), the multi-way reversing valve is connected with a load oil port I (38) and the multi-way reversing valve is connected with a load oil port II (39) on the multi-way reversing valve II (2), when oil is fed into a main oil inlet (33) and the multi-way reversing valves are not operated, hydraulic oil passes through the multi-way reversing valve II bypass oil inlet channel (22), the multi-way reversing valve II valve core (4), the multi-way reversing valve II bypass oil inlet channel (14), the multi-way reversing valve II bypass oil inlet channel (21), the multi-way reversing valve I valve core (3), the multi-way reversing valve bypass oil outlet channel (13) and the main oil return port (35), under the action of a bypass valve spring (26), a bypass valve oil inlet (24) is communicated with a bypass valve oil outlet (25) through a bypass valve (23) and then communicated with a main oil return port (35) for oil return, low-pressure standby work of the system is realized, when oil enters a main oil inlet (33) and a multi-way reversing valve is connected with a main oil return port (1) for work, a multi-way reversing valve is connected with a valve core (3) to move, a bypass oil outlet channel (13) of the multi-way reversing valve and a bypass oil inlet channel (21) of the multi-way reversing valve are connected with each other to be gradually cut off, meanwhile, a bypass valve control force (27) is applied to the left side of the bypass valve (23) to overcome the force of the bypass valve spring (26) to enable the valve core of the bypass valve (23) to move right to gradually close an oil return channel of the bypass valve oil inlet (24), namely, the channel of a main oil inlet (33) and the main oil return port (35) is gradually cut off, hydraulic oil enters an oil inlet channel (15) of a pressure compensation valve through an oil inlet channel (7) of the multi-way reversing valve, the first pressure compensation valve (5) starts to work, pressure oil is output to the first pressure compensation oil outlet channel (17) of the first pressure compensation valve and is connected with the first pressure compensation oil inlet channel (9) of the multi-way reversing valve and is supplied to the first load oil port (1) of the multi-way reversing valve through the first valve core (3) of the multi-way reversing valve, oil pressure is provided for the first load sensing oil outlet (19) of the first pressure compensation valve, the second load sensing oil outlet (20) of the second pressure compensation valve, the control oil port (32) of the oil inlet pressure compensation valve and the load sensing oil port (34), pressure of the first pressure compensation valve oil outlet channel (17) of the first pressure compensation valve and the first load sensing oil outlet (19) of the first pressure compensation valve is determined by the load size of the first load oil port (1) of the multi-way reversing valve, pressure of the first load sensing oil outlet (19) of the pressure compensation valve acts on the lower ends of the first pressure compensation valve (5) and the second pressure compensation valve (6), pressure of the oil inlet pressure compensation valve (30) of the oil inlet pressure compensation valve and the control oil inlet pressure oil port (32) of the oil inlet pressure compensation valve The oil inlet pressure compensation valve (28) starts to work under the combined action of the force of the pressure compensation valve spring (29), the working principle of the multi-way reversing valve unit I (2) is the same as that of the multi-way reversing valve unit I (1), when the multi-way reversing valve unit I (1) and the multi-way reversing valve unit I (2) work simultaneously, the pressure of the load sensing oil port (34) is the maximum load sensing pressure and acts on the lower ends of the two pressure compensation valves, oil is supplied to the multi-way reversing valve unit in a proportionally shunting manner, accordingly, low-pressure oil return through a bypass oil way is achieved when a hydraulic system of the multi-way reversing valve does not work, and oil is supplied to the multi-way reversing valve unit in a proportionally shunting manner according to the load sensing pressure during work.
2. A by-pass load sensing multiple directional control valve hydraulic system as defined in claim 1, wherein: the bypass oil path is only provided with a multi-path reversing valve connected bypass oil path.
3. A bypass load sense multiple directional control valve hydraulic system as defined in claim 1, wherein: the bypass oil path is a bypass oil path only with a bypass valve.
CN202110142057.5A 2021-02-02 2021-02-02 Bypass load sensing multi-way reversing valve hydraulic system Pending CN114838024A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110142057.5A CN114838024A (en) 2021-02-02 2021-02-02 Bypass load sensing multi-way reversing valve hydraulic system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110142057.5A CN114838024A (en) 2021-02-02 2021-02-02 Bypass load sensing multi-way reversing valve hydraulic system

Publications (1)

Publication Number Publication Date
CN114838024A true CN114838024A (en) 2022-08-02

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110142057.5A Pending CN114838024A (en) 2021-02-02 2021-02-02 Bypass load sensing multi-way reversing valve hydraulic system

Country Status (1)

Country Link
CN (1) CN114838024A (en)

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