CN115342093A - Hydraulic control bypass load sensing multi-way reversing valve hydraulic system - Google Patents
Hydraulic control bypass load sensing multi-way reversing valve hydraulic system Download PDFInfo
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- CN115342093A CN115342093A CN202110513739.2A CN202110513739A CN115342093A CN 115342093 A CN115342093 A CN 115342093A CN 202110513739 A CN202110513739 A CN 202110513739A CN 115342093 A CN115342093 A CN 115342093A
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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
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- Operation Control Of Excavators (AREA)
Abstract
A hydraulic system of hydraulic control bypass load sensing multi-way reversing valve is composed of a multi-way reversing valve unit, 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, the oil return of the bypass oil way is gradually cut off, and the multi-way reversing valve works, so that the oil return at low pressure is realized through the bypass oil way when the multi-way reversing valve hydraulic system does not work, and the oil is supplied to the multi-way reversing valve in a proportionally shunting manner according to the load induction pressure during working.
Description
Technical Field
The invention relates to a hydraulic system of a load sensing multi-way reversing valve, in particular to a hydraulic system of a hydraulic control bypass load sensing multi-way reversing valve.
Background
At present, a load sensing multi-way reversing valve hydraulic system for hydraulic control machinery such as an excavator, a loader and the like in the market has high standby pressure and consumes energy. Therefore, the market urgently needs a hydraulic control 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, the multi-way reversing valve works, therefore, the multi-way reversing valve hydraulic system works, low-pressure oil return is realized through the bypass oil way when not working, and oil is supplied to the multi-way reversing valve unit in a proportionally shunting manner according to load induction pressure during working.
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 sensing multi-way reversing valve hydraulic system for hydraulic control machinery such as an excavator, a loader and the like does not work, and when the multi-way reversing valve works, the oil return of the bypass oil way is gradually cut off to ensure the work of the multi-way reversing valve, so that the low-pressure oil return of the multi-way reversing valve hydraulic system 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 sensing pressure during work.
The utility model provides a multichannel switching-over valve hydraulic system is responded to hydraulic control bypass load which characterized in that: the pressure and flow control of the hydraulic system of the hydraulic control bypass load sensing multi-way directional control valve is completed by a bypass loop and a load sensing pressure compensation valve loop together, and comprises a first multi-way directional control valve (1), a second multi-way directional control valve (2), a first multi-way directional control valve (3), a second multi-way directional control valve (4), a first pressure compensation valve (5), a second pressure compensation valve (6), a first multi-way directional control valve (7), a second multi-way directional control valve (8), a first pressure compensation oil inlet channel (9), a second multi-way directional control valve (10), a first multi-way directional control valve (11), a second multi-way directional control valve (12), a first pressure compensation valve (13), a second pressure compensation valve (14), a first pressure compensation valve (15), a second pressure compensation valve (16), a first load sensing oil outlet (17), a second pressure compensation valve (18), a bypass valve (19), a pressure compensation spring (27), a pressure compensation spring oil outlet (21), a bypass spring (21), the oil inlet pressure compensation valve is controlled by an oil inlet (28), a main oil inlet (29), a load sensing oil port (30), a main oil return port (31), a multi-way reversing valve is connected with a first load oil port (32), the multi-way reversing valve is connected with a second load oil port (33), the multi-way reversing valve is connected with a first load oil port (34), and the multi-way reversing valve is connected with a second load oil port (35).
Wherein, the multi-way reversing valve is connected with a first hydraulic control oil inlet (1) and a second hydraulic control oil inlet (19) of the multi-way reversing valve, 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 (7) and a second oil inlet (8) of the multi-way reversing valve and is communicated with a main oil inlet (29), the multi-way reversing valve is connected with a first pressure compensation oil inlet (9) and is communicated with a first hydraulic control oil outlet (15) of the pressure compensation valve, the second pressure compensation oil inlet (10) of the multi-way reversing valve is communicated with a second hydraulic control oil outlet (16), the multi-way reversing valve is connected with a first oil return (11) and a second oil return (12) of the multi-way reversing valve and is communicated with a main oil return (31), the first hydraulic control oil inlet (17) of the multi-way reversing valve is communicated with a second hydraulic control oil return (19), the main oil outlet (19) of the multi-way reversing valve is communicated with a main oil return (19), the main oil inlet of the main oil return (19) is communicated with a main oil return valve (19), the main oil return valve (19) and a load sensing spring of the bypass valve (19), the bypass valve is communicated with a bypass valve (19), an oil inlet (26) of an oil inlet pressure compensation valve is communicated with a main oil inlet (29), an oil outlet (27) of the oil inlet pressure compensation valve is communicated with a main oil return port (31), an oil inlet pressure compensation valve control oil port (28) is communicated with a load sensing oil port (30), a multi-way reversing valve is connected with a load oil port I (32) and a multi-way reversing valve and a load oil port II (33) on the multi-way reversing valve I (1), the multi-way reversing valve is connected with a load hydraulic control oil port I (34) and a multi-way reversing valve II (35) on the multi-way reversing valve II (2), when the oil inlet of the main oil inlet (29) and each multi-way reversing valve do not work, a hydraulic control bypass valve control force (23) is not powerful, under the action of a hydraulic control bypass valve spring (22), a bypass valve oil inlet (20) is communicated with a bypass valve oil outlet (21) through a bypass valve (19) and then communicated with the main oil return port (31) to realize low-pressure standby work of the system, when the main oil inlet (29) and the main bypass valve (29) and the multi-way reversing valve (1) are connected, the bypass valve control oil inlet (19) is gradually closed, and the bypass valve control force of the bypass valve (19) is overcome the bypass valve and the bypass valve (19) is gradually closed, hydraulic oil is fed into a first oil inlet channel (7) of a pressure compensation valve through a multi-way reversing valve and flows into a first oil inlet channel (13) of the pressure compensation valve, the first pressure compensation valve (5) starts to work, pressure oil is output to a first oil outlet channel (15) of the pressure compensation valve and flows into a first pressure compensation oil inlet channel (9) of the multi-way reversing valve and flows into a first valve core (3) of the multi-way reversing valve through the multi-way reversing valve and then is supplied to a first load oil port (1) of the multi-way reversing valve, meanwhile, a first load sensing oil outlet channel (17) of the pressure compensation valve and a second load sensing oil outlet (18) of the pressure compensation valve and an oil inlet pressure compensation valve control oil port (28) and a load sensing oil port (30) both have oil pressure, the pressure of the first oil outlet channel (15) of the pressure compensation valve and the first load sensing oil outlet (17) of the pressure compensation valve is determined by the load size of the first oil inlet channel (1) of the multi-way reversing valve, meanwhile, the pressure of the first load sensing oil outlet (17) of the pressure compensation valve acts on the lower ends of the first pressure compensation valve (5) and the second pressure compensation valve (26) and the pressure compensation valve, and the pressure compensation valve act on the same principle that a second pressure compensation valve (2) of the first working valve and the multi-way reversing valve are connected, and the pressure compensation valve, and the working pressure compensation valve are controlled by the same pressure compensation valve, the pressure of the load sensing oil port (30) is the maximum load sensing pressure and acts on the lower ends of the two pressure compensation valves to realize the proportional shunt oil supply for the multi-way reversing valve, so that the low-pressure oil return through the bypass oil way is realized when the multi-way reversing valve hydraulic system does not work, and the proportional shunt oil supply is realized for the multi-way reversing valve 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 hydraulic system of a hydraulic control bypass load sensing multi-way reversing valve.
Detailed Description
Example one FIG. 1
The utility model provides a multichannel switching-over valve hydraulic system is responded to hydraulic control bypass load which characterized in that: the hydraulic control bypass load sensing multi-way reversing valve hydraulic system is completed by a bypass circuit and a load sensing pressure compensation valve circuit together, and comprises a first multi-way reversing valve (1), a second multi-way reversing valve (2), a first multi-way reversing valve (3), a second multi-way reversing valve (4), a first pressure compensation valve (5), a second pressure compensation valve (6), a first multi-way reversing valve (7), a second multi-way reversing valve (8), a first multi-way reversing valve (9), a second multi-way reversing valve (10), a first multi-way reversing valve (11), a second multi-way reversing valve (12), a first oil inlet (13), a second oil inlet (14), a first oil outlet (15), a second oil outlet (16), a first load sensing pressure compensation valve (17), a second oil inlet (13), a second hydraulic control pressure compensation valve (19), a pressure compensation spring (20), a pressure compensation spring (26), a pressure compensation spring (20), a pressure compensation spring (21), a bypass valve (21), a pressure compensation spring (21), the oil inlet pressure compensation valve is controlled by an oil inlet (28), a main oil inlet (29), a load sensing oil port (30), a main oil return port (31), a multi-way reversing valve is connected with a first load oil port (32), the multi-way reversing valve is connected with a second load oil port (33), the multi-way reversing valve is connected with a first load oil port (34), and the multi-way reversing valve is connected with a second load oil port (35).
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 (1) of the multi-way reversing valve, the multi-way reversing valve is connected with a second valve core (4) and a second pressure compensation valve (6) on the second (2) of the multi-way reversing valve, 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 (29), the multi-way reversing valve is connected with a first pressure compensation oil inlet channel (9) and communicated with a first oil outlet channel (15) of the pressure compensation valve, the second pressure compensation oil inlet channel (10) of the multi-way reversing valve is communicated with a second oil outlet channel (16) of the pressure compensation valve, 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 (31), the first load sensing bypass valve (17) of the pressure compensation valve and a second bypass valve (18) are communicated with a main oil return port (19), a main oil return port (19) of the pressure compensation valve is communicated with a main oil return spring (19), a main oil return port (19) of the main oil return spring is communicated with a main oil return port (19), a main oil return port (19) of the pressure compensation spring is communicated with a main oil return valve, an oil inlet (26) of an oil inlet pressure compensation valve is communicated with a main oil inlet (29), an oil outlet (27) of the oil inlet pressure compensation valve is communicated with a main oil return port (31), an oil inlet pressure compensation valve control oil port (28) is communicated with a load sensing oil port (30), a multi-way reversing valve is connected with a load oil port I (32) and a multi-way reversing valve and a load oil port II (33) on the multi-way reversing valve I (1), the multi-way reversing valve is connected with a load hydraulic control oil port I (34) and a multi-way reversing valve II (35) on the multi-way reversing valve II (2), when the oil inlet of the main oil inlet (29) and each multi-way reversing valve do not work, a hydraulic control bypass valve control force (23) is not powerful, under the action of a hydraulic control bypass valve spring (22), a bypass valve oil inlet (20) is communicated with a bypass valve oil outlet (21) through a bypass valve (19) and then communicated with the main oil return port (31) to realize low-pressure standby work of the system, when the main oil inlet (29) and the main bypass valve (29) and the multi-way reversing valve (1) are connected, the bypass valve control oil inlet (19) is gradually closed, and the bypass valve control force of the bypass valve (19) is overcome the bypass valve and the bypass valve (19) is gradually closed, hydraulic oil is fed into an oil inlet channel (7) of the pressure compensation valve through the multi-way reversing valve and enters an oil inlet channel (13) of the pressure compensation valve, the pressure compensation valve I (5) starts to work, pressure oil is output to an oil inlet channel (9) of the multi-way reversing valve and pressure compensation valve through an oil outlet channel (15) of the pressure compensation valve and then is fed to a load oil port of the multi-way reversing valve I (1) through a valve core (3) of the multi-way reversing valve, meanwhile, a load sensing oil outlet (17) of the pressure compensation valve I, a load sensing oil outlet (18) of the pressure compensation valve II, a control oil port (28) of the oil inlet pressure compensation valve and a load sensing oil port (30) all have oil pressure, the pressure of the first pressure compensation valve oil outlet channel (15) and the first pressure compensation valve load sensing oil outlet (17) is determined by the load size of a first multi-way reversing valve connection (1) load oil port, meanwhile, the pressure of the first pressure compensation valve load sensing oil outlet (17) acts on the lower ends of a first pressure compensation valve (5) and a second pressure compensation valve (6), the first oil inlet pressure compensation valve (24) starts to work under the combined action of the pressure of oil from an oil inlet (26) of the first oil inlet pressure compensation valve and an oil inlet pressure compensation valve control oil port (28) and the force of an oil inlet pressure compensation valve spring (25), the working principle of a second multi-way reversing valve connection (2) is the same as that of the first multi-way reversing valve connection (1), and when the first multi-way reversing valve connection (1) and the second multi-way reversing valve connection (2) work simultaneously, the pressure of the load sensing oil port (30) is the maximum load sensing pressure and acts on the lower ends of the two pressure compensation valves to realize the proportional shunting oil supply for the multi-way reversing valve, so that the low-pressure oil return through the bypass oil way is realized when the hydraulic system of the multi-way reversing valve does not work, and the proportional shunting oil supply is realized for the multi-way reversing valve according to the load sensing pressure during work.
Claims (1)
1. The utility model provides a multichannel switching-over valve hydraulic system is responded to hydraulic control bypass load which characterized in that: the pressure and flow control of the hydraulic system of the hydraulic control bypass load sensing multi-way directional control valve is completed by a bypass loop and a load sensing pressure compensation valve loop together, and comprises a first multi-way directional control valve (1), a second multi-way directional control valve (2), a first multi-way directional control valve (3), a second multi-way directional control valve (4), a first pressure compensation valve (5), a second pressure compensation valve (6), a first multi-way directional control valve (7), a second multi-way directional control valve (8), a first pressure compensation oil inlet channel (9), a second multi-way directional control valve (10), a first multi-way directional control valve (11), a second multi-way directional control valve (12), a first pressure compensation valve (13), a second pressure compensation valve (14), a first pressure compensation valve (15), a second pressure compensation valve (16), a first load sensing oil outlet (17), a second pressure compensation valve (18), a bypass valve (19), a pressure compensation spring (27), a pressure compensation spring oil outlet (21), a bypass spring (21), an oil inlet pressure compensating valve control oil port (28), a main oil inlet (29), a load sensing oil port (30), a main oil return port (31), a multi-way directional control valve connected with a load oil port I (32), a multi-way directional control valve connected with a load oil port II (33), a multi-way directional control valve connected with a load oil port I (34), a multi-way directional control valve connected with a load oil port II (35), a multi-way directional control valve connected with a valve core (3) and a pressure compensating valve I (5) on the multi-way directional control valve connected with I (1), a multi-way directional control valve connected with a valve core II (4) and a pressure compensating valve II (6) on the multi-way directional control valve connected with II (2), a multi-way directional control valve connected with an oil inlet channel (7) and a multi-way directional control valve connected with two oil inlet channels (8) and the main oil inlet (29), a multi-way directional control valve connected with a pressure compensating channel oil inlet channel (9) and a pressure compensating valve I (15), a multi-way directional control valve connected with a load oil port II (10) and a pressure compensating oil port II (17), a multi-way directional control valve connected with a load oil port II (17) and a load pressure compensating oil port II (17) and a pressure compensating valve connected with a load oil port II (17), an oil outlet (21) of a hydraulic control bypass valve is communicated with a main oil return port (31), a spring (22) of the hydraulic control bypass valve is arranged on the right side of the hydraulic control bypass valve (19), a control force (23) of the hydraulic control bypass valve acts on the left side of the hydraulic control bypass valve (19), a spring (25) of an oil inlet pressure compensation valve is arranged on the right side of an oil inlet pressure compensation valve (24), an oil inlet (26) of the oil inlet pressure compensation valve is communicated with a main oil inlet (29), an oil outlet (27) of the oil inlet pressure compensation valve is communicated with the main oil return port (31), an oil inlet pressure compensation valve control oil port (28) is communicated with a load sensing oil port (30), a multi-way reversing valve is connected with a load oil port I (32) and a multi-way reversing valve and a load oil port II (33) on a multi-way reversing valve connection I (1), the multi-way reversing valve is connected with a load oil port I (34) and a multi-way reversing valve connection II (35) on a multi-way reversing valve connection II (2), when the oil inlet (29) is connected with each multi-way reversing valve, the oil inlet is communicated with the main oil return port (23), the hydraulic control bypass valve control oil return port (23) and the main oil return valve (19), and the hydraulic control force of the bypass valve (29) is communicated with the main oil return port (31), and the bypass valve, the hydraulic control bypass valve (21) when the main oil return port (21) is not working bypass valve is communicated with the main oil inlet, meanwhile, the control force (23) of the hydraulic control bypass valve is applied to the left side of the hydraulic control bypass valve (19) to overcome the force of a spring (22) of the hydraulic control bypass valve to enable a valve core of the hydraulic control bypass valve (19) to move right to gradually close an oil return channel of an oil inlet (20) of the hydraulic control bypass valve, so that a channel between a main oil inlet (29) and a main oil return port (31) is gradually cut off, hydraulic oil is fed into an oil inlet channel (13) of a pressure compensation valve through a multi-way reversing valve and an oil inlet channel (7), the pressure compensation valve (5) starts to work, pressure oil is output from an oil outlet channel (15) of the pressure compensation valve to a pressure compensation oil inlet channel (9) of a multi-way reversing valve and a valve core (3) through the multi-way reversing valve and then is supplied to a load oil port (1) of the multi-way reversing valve, meanwhile, the oil pressure is respectively arranged at the first load sensing oil outlet (17) of the pressure compensation valve, the second load sensing oil outlet (18) of the pressure compensation valve, the control oil port (28) of the oil inlet pressure compensation valve and the load sensing oil port (30), the pressure of the first oil outlet channel (15) of the pressure compensation valve and the first load sensing oil outlet (17) of the pressure compensation valve is determined by the load size of the load oil port of the first multi-way reversing valve (1), meanwhile, the pressure of the first load sensing oil outlet (17) of the pressure compensation valve acts on the lower ends of the first pressure compensation valve (5) and the second pressure compensation valve (6), and the pressure of the oil coming from the oil inlet pressure compensation valve (26) and the control oil port (28) of the oil inlet pressure compensation valve and the force of a spring (25) of the oil inlet pressure compensation valve are shared The oil inlet pressure compensation valve (24) starts to work under the same action, the working principle of the multi-way reversing valve linkage II (2) is the same as that of the multi-way reversing valve linkage I (1), when the multi-way reversing valve linkage I (1) and the multi-way reversing valve linkage II (2) work simultaneously, the pressure of the load sensing oil port (30) is the maximum load sensing pressure and acts on the lower ends of the two pressure compensation valves, the multi-way reversing valve linkage oil supply is achieved in a proportionally shunting manner, therefore, low-pressure oil return through a bypass oil way when a multi-way reversing valve hydraulic system does not work is achieved, and the multi-way reversing valve linkage oil supply is achieved in a proportionally shunting manner according to the load sensing pressure during work.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110513739.2A CN115342093A (en) | 2021-05-12 | 2021-05-12 | Hydraulic control bypass load sensing multi-way reversing valve hydraulic system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110513739.2A CN115342093A (en) | 2021-05-12 | 2021-05-12 | Hydraulic control bypass load sensing multi-way reversing valve hydraulic system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115342093A true CN115342093A (en) | 2022-11-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110513739.2A Pending CN115342093A (en) | 2021-05-12 | 2021-05-12 | Hydraulic control bypass load sensing multi-way reversing valve hydraulic system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115342093A (en) |
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2021
- 2021-05-12 CN CN202110513739.2A patent/CN115342093A/en active Pending
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