TWI755182B - Energy-saving hydraulic system - Google Patents

Energy-saving hydraulic system Download PDF

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TWI755182B
TWI755182B TW109142497A TW109142497A TWI755182B TW I755182 B TWI755182 B TW I755182B TW 109142497 A TW109142497 A TW 109142497A TW 109142497 A TW109142497 A TW 109142497A TW I755182 B TWI755182 B TW I755182B
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valve
channel
pressure
interface
section
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TW109142497A
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TW202223246A (en
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宋武隆
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武漢機械股份有限公司
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Priority to CN202111431683.2A priority patent/CN114576225A/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
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F15B13/024—Pressure relief valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F15B13/027—Check valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more 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
    • F15B20/00—Safety arrangements for fluid actuator systems; Applications of safety devices in fluid actuator systems; Emergency measures for fluid actuator systems
    • F15B20/007—Overload
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
    • F15B13/044—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by electrically-controlled means, e.g. solenoids, torque-motors
    • F15B2013/0448—Actuation by solenoid and permanent magnet
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P80/00—Climate change mitigation technologies for sector-wide applications
    • Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

一種節能液壓系統包含一動力泵、一液壓致動器、一控制閥、一比例電磁閥、一主管線，及一溢流單元。 該主管線包括一第一溢流段，及一第二溢流段。 該溢流單元包括一安全閥、一連接於該第一溢流段與該安全閥之間的第一分流通道，及一連接於該第二溢流段與該安全閥之間的第二分流通道。當第一溢流段與該第二溢流段之間的壓力差抵達一壓差閾值時，該安全閥會被觸發而導通，使得工作流體排出。 本發明藉由該第二分流通道使得該安全閥在該比例電磁閥的開度變小時也能被觸發，減少該動力泵的負載，從而產生節能效果。An energy-saving hydraulic system includes a power pump, a hydraulic actuator, a control valve, a proportional solenoid valve, a main line, and an overflow unit. The main line includes a first overflow section and a second overflow section. The overflow unit includes a safety valve, a first branch channel connected between the first overflow section and the safety valve, and a second branch channel connected between the second overflow section and the safety valve aisle. When the pressure difference between the first overflow section and the second overflow section reaches a pressure difference threshold, the safety valve will be triggered to conduct, so that the working fluid is discharged. In the present invention, the safety valve can be triggered even when the opening degree of the proportional solenoid valve is reduced by the second diverting channel, thereby reducing the load of the power pump, thereby producing an energy saving effect.

Description

節能液壓系統Energy-saving hydraulic system

本發明是有關於一種致動組件，特別是指一種節能液壓系統。 The present invention relates to an actuating assembly, in particular to an energy-saving hydraulic system.

一種現有的液壓系統包含一動力泵、一液壓缸、一設置於該動力泵與該液壓缸之間並用於控制該液壓缸做動的控制閥、一設置於該動力泵與該控制閥之間並用於調節流量的比例電磁閥、一設置於該動力泵與該比例電磁閥之間的安全閥，及一與該動力泵、該液壓缸、該控制閥、該比例電磁閥、該安全閥連通的管線。工作流體會沿該管線依序由該動力泵經過該安全閥、該比例電磁閥與該控制閥並抵達該液壓缸。藉由控制該控制閥，操作者可以控制該液壓缸的做動並連動其他機械結構，達成致動功能。藉由控制該比例電磁閥，操作者可以進一步控制流入該液壓缸內的流量，進而控制該液壓缸做動時的速度與力道。當該管線內的壓力過大並抵達一溢流閾值時，該安全閥會被觸發而導通，使得工作流體由該安全閥排出，以防止該動力泵或是該液壓缸因為過度負載而損毀。 An existing hydraulic system includes a power pump, a hydraulic cylinder, a control valve disposed between the power pump and the hydraulic cylinder and used to control the action of the hydraulic cylinder, and a control valve disposed between the power pump and the control valve A proportional solenoid valve for regulating flow, a safety valve disposed between the power pump and the proportional solenoid valve, and a communication with the power pump, the hydraulic cylinder, the control valve, the proportional solenoid valve, and the safety valve 's pipeline. The working fluid will pass through the safety valve, the proportional solenoid valve and the control valve from the power pump in sequence along the pipeline and arrive at the hydraulic cylinder. By controlling the control valve, the operator can control the actuation of the hydraulic cylinder and link other mechanical structures to achieve the actuation function. By controlling the proportional solenoid valve, the operator can further control the flow into the hydraulic cylinder, thereby controlling the speed and force of the hydraulic cylinder when it is actuated. When the pressure in the pipeline is too large and reaches an overflow threshold, the safety valve will be triggered and turned on, so that the working fluid is discharged from the safety valve to prevent the power pump or the hydraulic cylinder from being damaged due to excessive load.

然而，在控制該比例電磁閥的過程中，若該比例電磁閥 的開度變小，則通過該比例電磁閥的流量也變小。這會導致該比例電磁閥上游處的壓力相應地上升。但是，上升後的壓力未必會超過該溢流閾值，因此不一定會馬上觸發該安全閥。要等到壓力上升至該溢流閾值，該安全閥才會被觸發。在這種情況下，該動力泵仍然承受了較高的負載，雖然不至於損壞，但是相當耗費能源。 However, in the process of controlling the proportional solenoid valve, if the proportional solenoid valve The opening of the valve becomes smaller, the flow through the proportional solenoid valve also becomes smaller. This causes a corresponding rise in pressure upstream of the proportional solenoid valve. However, the rising pressure may not necessarily exceed the relief threshold, so the safety valve may not be triggered immediately. The safety valve will not be triggered until the pressure rises to the overflow threshold. In this case, the power pump still bears a high load, and although it is not damaged, it consumes a lot of energy.

因此，本發明的目的，即在提供一種減少負載而節省能源的節能液壓系統。 Therefore, the purpose of the present invention is to provide an energy-saving hydraulic system that reduces load and saves energy.

於是，本發明節能液壓系統，包含一動力泵、一液壓致動器、一控制閥、一比例電磁閥、一主管線，及一溢流單元。 Therefore, the energy-saving hydraulic system of the present invention includes a power pump, a hydraulic actuator, a control valve, a proportional solenoid valve, a main line, and an overflow unit.

該動力泵用於驅動一工作流體。該液壓致動器供該工作流體流入並產生致動功能。該控制閥設置於該動力泵與該液壓致動器之間並用於控制該液壓致動器做動。該比例電磁閥設置於該動力泵與該液壓致動器之間並用於調節流量。該主管線與該動力泵、該液壓致動器、該控制閥、該比例電磁閥連通，並包括一連接於該動力泵與該比例電磁閥之間的第一溢流段，及一連接於該比例電磁閥與該控制閥之間的第二溢流段。 The power pump is used to drive a working fluid. The hydraulic actuator feeds the working fluid and produces an actuation function. The control valve is arranged between the power pump and the hydraulic actuator and is used to control the actuation of the hydraulic actuator. The proportional solenoid valve is arranged between the power pump and the hydraulic actuator and is used for regulating flow. The main line communicates with the power pump, the hydraulic actuator, the control valve, and the proportional solenoid valve, and includes a first relief section connected between the power pump and the proportional solenoid valve, and a first relief section connected between the power pump and the proportional solenoid valve. A second relief section between the proportional solenoid valve and the control valve.

該溢流單元包括一安全閥、一連接於該第一溢流段與該安全閥之間的第一分流通道、一連接於該第二溢流段與該安全閥之間的第二分流通道、一連接於該安全閥並用於排水的第一排水通 道、一連接於該第二分流通道與該第一排水通道之間的第二排水通道，及一設置於該第二排水通道的止回閥。該安全閥具有一與該第一分流通道連接的第一接口，及一與該第二分流通道連接的第二接口。 The overflow unit includes a safety valve, a first branch channel connected between the first overflow section and the safety valve, and a second branch channel connected between the second overflow section and the safety valve , a first drainage channel connected to the safety valve and used for drainage a channel, a second drainage channel connected between the second shunt channel and the first drainage channel, and a check valve disposed in the second drainage channel. The safety valve has a first port connected with the first shunt channel, and a second port connected with the second shunt channel.

當該第一溢流段內的壓力抵達一第一溢流閾值時，該安全閥會被觸發而導通，使得該工作流體由該第一分流通道流入該第一排水通道並排出。當該第二溢流段內的壓力抵達一第二溢流閾值時，該止回閥會被觸發而導通，使該工作流體由該第二分流通道流入該第二排水通道與該第一排水通道並排出，並使該第二接口處的壓力下降。當該第一接口處的壓力與該第二接口處的壓力之間的壓力差抵達一壓差閾值時，該安全閥會被觸發而導通，使得該工作流體經由該第一分流通道流入該第一排水通道並排出。 When the pressure in the first overflow section reaches a first overflow threshold, the safety valve will be triggered and turned on, so that the working fluid flows into the first drainage channel from the first shunt channel and is discharged. When the pressure in the second overflow section reaches a second overflow threshold, the check valve will be triggered and turned on, so that the working fluid flows from the second branch channel into the second drainage channel and the first drainage channel channel and discharge, and the pressure at the second port is reduced. When the pressure difference between the pressure at the first interface and the pressure at the second interface reaches a pressure difference threshold, the safety valve will be triggered and turned on, so that the working fluid flows into the second through the first shunt channel A drain channel and drain.

本發明的功效在於：藉由該第二分流通道將該第二溢流段的壓力導引至該止回閥與該第二接口，使得該安全閥在該比例電磁閥的開度變小時也能被觸發，減少該動力泵的負載，從而產生節能效果。 The effect of the present invention is that: the pressure of the second overflow section is guided to the check valve and the second interface through the second shunt channel, so that the safety valve can also be released when the opening degree of the proportional solenoid valve becomes smaller. can be triggered to reduce the load of the power pump, thereby producing an energy saving effect.

1:動力泵 1: Power pump

2:液壓致動器 2: Hydraulic Actuator

3:控制閥 3: Control valve

4:比例電磁閥 4: Proportional solenoid valve

5:主管線 5: Main Line

51:第一溢流段 51: The first overflow section

52:第二溢流段 52: Second overflow section

6:溢流單元 6: Overflow unit

61:安全閥 61: Safety valve

611:閥體 611: valve body

612:第一接口 612: The first interface

613:第二接口 613: Second interface

614:排水接口 614: Drainage interface

615:閥內通道 615: In-valve channel

616:偵壓通道 616: pressure detection channel

617:第一擋止組 617: First stop group

618:第二擋止組 618: Second stop group

619:第一分流段 619: First Diversion Section

620:第二分流段 620: Second split section

621:第一擋止件 621: First stopper

622:抵靠件 622: Abutment

623:第一彈簧 623: First Spring

624:通孔 624: Through hole

625:第二擋止件 625:Second stop

626:第二彈簧 626: Second Spring

63:第一分流通道 63: The first shunt channel

64:第二分流通道 64: Second shunt channel

65:第一排水通道 65: First drainage channel

66:第二排水通道 66: Second drainage channel

67:止回閥 67: Check valve

68:節流閥 68: Throttle valve

本發明的其他的特徵及功效，將於參照圖式的實施方式中清楚地呈現，其中：圖1是本發明節能液壓系統的一實施例的一結構示意圖； 圖2是該實施例的一比例電磁閥的一通電量時序圖；圖3是未應用本案技術手段的一液壓系統的一結構示意圖；及圖4是該實施例的一安全閥的一結構示意圖。 Other features and effects of the present invention will be clearly presented in the embodiments with reference to the drawings, wherein: FIG. 1 is a schematic structural diagram of an embodiment of the energy-saving hydraulic system of the present invention; FIG. 2 is a timing diagram of a power-on amount of a proportional solenoid valve of the embodiment; FIG. 3 is a schematic structural diagram of a hydraulic system without applying the technical means of the present case; and FIG. 4 is a structural schematic diagram of a safety valve of the embodiment. .

參閱圖1、圖2與圖3，本發明節能液壓系統的一實施例，包含一動力泵1、一液壓致動器2、一控制閥3、一比例電磁閥4、一主管線5，及一溢流單元6。 1, 2 and 3, an embodiment of the energy-saving hydraulic system of the present invention includes a power pump 1, a hydraulic actuator 2, a control valve 3, a proportional solenoid valve 4, a main line 5, and An overflow unit 6 .

該動力泵1用於驅動一工作流體(未於圖式中顯示)。該液壓致動器2供該工作流體流入並產生致動功能。該控制閥3設置於該動力泵1與該液壓致動器2之間並用於控制該液壓致動器2做動。該比例電磁閥4設置於該動力泵1與該液壓致動器2之間並用於調節流量。該主管線5與該動力泵1、該液壓致動器2、該控制閥3、該比例電磁閥4連通，並包括一連接於該動力泵1與該比例電磁閥4之間的第一溢流段51，及一連接於該比例電磁閥4與該控制閥3之間的第二溢流段52。 The power pump 1 is used to drive a working fluid (not shown in the drawings). The hydraulic actuator 2 provides the inflow of the working fluid and produces an actuation function. The control valve 3 is arranged between the power pump 1 and the hydraulic actuator 2 and is used to control the hydraulic actuator 2 to act. The proportional solenoid valve 4 is arranged between the power pump 1 and the hydraulic actuator 2 and is used to adjust the flow. The main line 5 communicates with the power pump 1 , the hydraulic actuator 2 , the control valve 3 , and the proportional solenoid valve 4 , and includes a first overflow connected between the power pump 1 and the proportional solenoid valve 4 Flow section 51 , and a second overflow section 52 connected between the proportional solenoid valve 4 and the control valve 3 .

要說明的是，在本實施例中該液壓致動器2為液壓缸，該控制閥3為三位四通閥，但是此處只是舉例而言，本領域的技術人員可以依據需求採用不同的元件配置以達成致動功能，不應以此為限。 It should be noted that, in this embodiment, the hydraulic actuator 2 is a hydraulic cylinder, and the control valve 3 is a three-position four-way valve, but this is just an example, and those skilled in the art can use different The configuration of components to achieve the actuation function should not be limited thereto.

該溢流單元6包括一安全閥61、一連接於該第一溢流段 51與該安全閥61之間的第一分流通道63、一連接於該第二溢流段52與該安全閥61之間的第二分流通道64、一連接於該安全閥61並用於排水的第一排水通道65、一連接於該第二分流通道64與該第一排水通道65之間的第二排水通道66、一設置於該第二排水通道66的止回閥67，及一設置於該第二分流通道64的節流閥68。 The overflow unit 6 includes a safety valve 61, a valve connected to the first overflow section 51 and the safety valve 61, a first shunt channel 63, a second shunt channel 64 connected between the second overflow section 52 and the safety valve 61, a second shunt channel 64 connected to the safety valve 61 and used for drainage. The first drainage channel 65, a second drainage channel 66 connected between the second branch channel 64 and the first drainage channel 65, a check valve 67 disposed in the second drainage channel 66, and a The throttle valve 68 of the second branch passage 64 .

進一步參閱圖4，該安全閥61具有一閥體611、一與該第一分流通道63連接的第一接口612、一與該第二分流通道64連接的第二接口613、一設置在相反於該第一接口612的一側並與該第一排水通道65連接的排水接口614、一連接於該第一接口612與該排水接口614之間的閥內通道615、一連接於該第一接口612與該閥內通道615之間的偵壓通道616、一第一擋止組617，及一第二擋止組618。 Further referring to FIG. 4 , the safety valve 61 has a valve body 611 , a first port 612 connected to the first shunt channel 63 , a second port 613 connected to the second shunt channel 64 , a second port 613 disposed opposite to the A drain port 614 connected to the first drain channel 65 on one side of the first port 612 , a valve inner channel 615 connected between the first port 612 and the drain port 614 , a valve inner channel 615 connected to the first port The pressure detection channel 616 between 612 and the valve inner channel 615 , a first blocking group 617 , and a second blocking group 618 .

該閥體611界定出該第一接口612、該第二接口613、該排水接口614、該閥內通道615與該偵壓通道616。該閥內通道615具有一第一分流段619，及一第二分流段620。該第一分流段619相鄰並連通於該偵壓通道616。該第二分流段620與該第一分流段619相間隔且與該偵壓通道616互不連通。該第一擋止組617設置於該第一分流段619與該偵壓通道616的交界處。該第二擋止組618設置於該第二分流段620且部分埋設於該閥體611。 The valve body 611 defines the first port 612 , the second port 613 , the drain port 614 , the valve inner channel 615 and the pressure detection channel 616 . The valve inner channel 615 has a first flow dividing section 619 and a second flow dividing section 620 . The first diverter section 619 is adjacent to and communicated with the pressure detection channel 616 . The second diversion section 620 is spaced from the first diversion section 619 and is not communicated with the pressure detection channel 616 . The first blocking group 617 is disposed at the junction of the first diverting section 619 and the pressure detection channel 616 . The second blocking group 618 is disposed in the second diverting section 620 and partially embedded in the valve body 611 .

該第一擋止組617具有一由該偵壓通道616凸伸至該第 一分流段619內的第一擋止件621、一設置於該偵壓通道616內並相鄰於該第二接口613的抵靠件622，及一連接於該第一擋止件621與該抵靠件622之間的第一彈簧623。該抵靠件622固定於該閥體611且具有一由該第二接口613的一側連通至該第一擋止件621的一側的通孔624。該第二擋止組618具有一由該閥體611凸伸至該第二分流段620內的第二擋止件625，及一連接於該第二擋止件625與該閥體611之間的第二彈簧626。 The first blocking group 617 has a protrusion extending from the pressure detection channel 616 to the first stopper group 617 . A first stopper 621 in the diverting section 619, an abutment 622 disposed in the pressure detection channel 616 and adjacent to the second port 613, and a connection between the first stopper 621 and the second port 613 The first spring 623 between the abutting pieces 622 . The abutting member 622 is fixed to the valve body 611 and has a through hole 624 that communicates from one side of the second port 613 to one side of the first blocking member 621 . The second blocking group 618 has a second blocking member 625 protruding from the valve body 611 into the second diverting section 620 , and a second blocking member 625 connected between the second blocking member 625 and the valve body 611 the second spring 626.

由於該第一分流通道63連接於該第一溢流段51與該安全閥61之間，該第一溢流段51內的壓力會被導引至該第一接口612。當該第一溢流段51內的壓力抵達一第一溢流閾值時，該第二擋止件625會承受來自於該第一接口612的壓力，導致該第二彈簧626被壓縮並使得該第二擋止件625縮入該閥體611。該工作流體便可以通過該第二分流段620並抵達該排水接口614。換句話說，此時該安全閥61是被觸發而導通的，因此該工作流體可以由該第一分流通道63流入該第一排水通道65並排出。如此一來，便能避免該主管線5的壓力過大而導致該動力泵1或是該液壓缸因為過度負載而損毀。值得一提的是，在本實施例中該第一溢流閾值是取決於該第二彈簧626的剛性。因此，應用本實施例時可以自由選用剛性符合需求的第二彈簧626以設定該第一溢流閾值。 Since the first branch passage 63 is connected between the first relief section 51 and the safety valve 61 , the pressure in the first relief section 51 will be guided to the first port 612 . When the pressure in the first overflow section 51 reaches a first overflow threshold, the second stopper 625 will bear the pressure from the first port 612, causing the second spring 626 to be compressed and making the The second stopper 625 is retracted into the valve body 611 . The working fluid can then pass through the second branching section 620 and reach the drain port 614 . In other words, at this time, the safety valve 61 is triggered and turned on, so the working fluid can flow into the first drainage channel 65 from the first branch channel 63 and be discharged. In this way, it is possible to prevent the power pump 1 or the hydraulic cylinder from being damaged due to excessive load caused by the excessive pressure of the main line 5 . It is worth mentioning that, in this embodiment, the first overflow threshold is determined by the rigidity of the second spring 626 . Therefore, when this embodiment is applied, the second spring 626 with rigidity that meets the requirements can be freely selected to set the first overflow threshold.

又，當該比例電磁閥4的開度變小時，通過該比例電磁閥 4的流量也會變小。這將導致該第一溢流段51與該第二溢流段52之間產生壓力差。此時，若該第二溢流段52內的壓力抵達一第二溢流閾值，該止回閥67會被觸發而導通，使該工作流體由該第二分流通道64流入該第二排水通道66與該第一排水通道65並排出，並使該第二接口613處的壓力下降。 Also, when the opening degree of the proportional solenoid valve 4 becomes small, the proportional solenoid valve 4 passes through the 4's flow will also be smaller. This will result in a pressure difference between the first overflow section 51 and the second overflow section 52 . At this time, if the pressure in the second overflow section 52 reaches a second overflow threshold, the check valve 67 will be triggered and turned on, so that the working fluid flows from the second branch channel 64 into the second drainage channel 66 is discharged in parallel with the first drainage channel 65, and the pressure at the second port 613 is reduced.

由於該抵靠件622具有該通孔624，該第二接口613處的壓力會被導引至該第一擋止件621。當該第一接口612處的壓力與該第二接口613處的壓力之間的壓力差抵達一壓差閾值時，該第一擋止件621會承受來自於該第一接口612的壓力而克服來自於該第二接口613的壓力與該第一彈簧623的剛性，導致該第一彈簧623被壓縮並使得該第一擋止件621縮入該偵壓通道616。此時，該工作流體便可以通過該第一分流段619並抵達該排水接口614。換句話說，此時該安全閥61是被觸發而導通的，因此該工作流體可以由該第一分流通道63流入該第一排水通道65並排出。如此一來，當該比例電磁閥4的開度變小時，該安全閥61也能被觸發而導通，從而能減少該動力泵1的負載，進而產生節省能源的功效。 Since the abutting member 622 has the through hole 624 , the pressure at the second interface 613 will be guided to the first blocking member 621 . When the pressure difference between the pressure at the first interface 612 and the pressure at the second interface 613 reaches a pressure difference threshold, the first stopper 621 will be overcome by the pressure from the first interface 612 The pressure from the second port 613 and the rigidity of the first spring 623 cause the first spring 623 to be compressed and the first stopper 621 to retract into the pressure detection channel 616 . At this time, the working fluid can pass through the first branching section 619 and reach the drainage port 614 . In other words, at this time, the safety valve 61 is triggered and turned on, so the working fluid can flow into the first drainage channel 65 from the first branch channel 63 and be discharged. In this way, when the opening of the proportional solenoid valve 4 becomes smaller, the safety valve 61 can also be triggered and turned on, thereby reducing the load of the power pump 1 , thereby producing the effect of saving energy.

值得說明的是，由於該第一接口612處的壓力是來自於較上游處的該第一溢流段51，該第二接口613處的壓力則來自於較下游處的該第二溢流段52，該第一接口612處的壓力勢必會大於該第二接口613處的壓力。關鍵之處只在於：該第一接口612處的壓 力與該第二接口613處的壓力之間的壓力差是否能克服該第一彈簧623的剛性。因此，在本實施例中該壓差閾值是取決於該第一彈簧623的剛性，應用本實施例時可以自由選用剛性符合需求的第一彈簧623以設定該壓差閾值。 It is worth noting that, since the pressure at the first port 612 comes from the first overflow section 51 at the upstream side, the pressure at the second port 613 comes from the second overflow section at the downstream side 52 , the pressure at the first port 612 is bound to be greater than the pressure at the second port 613 . The key point is only: the pressure at the first interface 612 Whether the pressure difference between the force and the pressure at the second interface 613 can overcome the rigidity of the first spring 623 . Therefore, in this embodiment, the pressure difference threshold is determined by the rigidity of the first spring 623 . When applying this embodiment, a first spring 623 whose rigidity meets the requirements can be freely selected to set the pressure difference threshold.

此外，該節流閥68可以穩定該第二分流通道64內的流量，預防該止回閥67因為瞬間的壓力波動就被觸發而導通。 In addition, the throttle valve 68 can stabilize the flow in the second branch passage 64, preventing the check valve 67 from being triggered and conducting due to instantaneous pressure fluctuations.

綜上所述，本發明節能液壓系統藉由該第二分流通道64將該第二溢流段52的壓力導引至該止回閥67與該第二接口613，使得該安全閥61在該比例電磁閥4的開度變小時也能被觸發，減少該動力泵1的負載，從而產生節能效果，故確實能達成本發明的目的。 To sum up, the energy-saving hydraulic system of the present invention guides the pressure of the second overflow section 52 to the check valve 67 and the second interface 613 through the second diverting channel 64, so that the safety valve 61 is in the When the opening degree of the proportional solenoid valve 4 becomes smaller, it can also be triggered to reduce the load of the power pump 1, thereby producing an energy saving effect, so the object of the present invention can be achieved.

惟以上所述者，僅為本發明的實施例而已，當不能以此限定本發明實施的範圍，凡是依本發明申請專利範圍及專利說明書內容所作的簡單的等效變化與修飾，皆仍屬本發明專利涵蓋的範圍內。 However, the above are only examples of the present invention, and should not limit the scope of implementation of the present invention. Any simple equivalent changes and modifications made according to the scope of the patent application of the present invention and the contents of the patent specification are still included in the scope of the present invention. within the scope of the invention patent.

1:動力泵 1: Power pump

2:液壓致動器 2: Hydraulic Actuator

3:控制閥 3: Control valve

4:比例電磁閥 4: Proportional solenoid valve

5:主管線 5: Main Line

51:第一溢流段 51: The first overflow section

52:第二溢流段 52: Second overflow section

6:溢流單元 6: Overflow unit

61:安全閥 61: Safety valve

63:第一分流通道 63: The first shunt channel

64:第二分流通道 64: Second shunt channel

65:第一排水通道 65: First drainage channel

66:第二排水通道 66: Second drainage channel

67:止回閥 67: Check valve

68:節流閥 68: Throttle valve

Claims (7)

一種節能液壓系統，包含：一動力泵，用於驅動一工作流體；一液壓致動器，供該工作流體流入並產生致動功能；一控制閥，設置於該動力泵與該液壓致動器之間並用於控制該液壓致動器做動；一比例電磁閥，設置於該動力泵與該液壓致動器之間並用於調節流量；一主管線，與該動力泵、該液壓致動器、該控制閥、該比例電磁閥連通，該主管線包括一連接於該動力泵與該比例電磁閥之間的第一溢流段，及一連接於該比例電磁閥與該控制閥之間的第二溢流段；及一溢流單元，包括一安全閥、一連接於該第一溢流段與該安全閥之間的第一分流通道、一連接於該第二溢流段與該安全閥之間的第二分流通道、一連接於該安全閥並用於排水的第一排水通道、一連接於該第二分流通道與該第一排水通道之間的第二排水通道，及一設置於該第二排水通道的止回閥，該安全閥具有一與該第一分流通道連接的第一接口，及一與該第二分流通道連接的第二接口，當該第一溢流段內的壓力抵達一第一溢流閾值時，該安全閥會被觸發而導通，使得該工作流體由該第一分流通道流入該第一排水通道並排出，當該第二溢流段內的壓力抵達一第二溢流閾值時，該止回閥被觸發而導通，使該工作流體由該第二分流通道流入該第二排水通道與該第一排水通道 並排出，並使該第二接口處的壓力下降，當該第一接口處的壓力與該第二接口處的壓力之間的壓力差抵達一壓差閾值時，該安全閥會被觸發而導通，使得該工作流體經由該第一分流通道流入該第一排水通道並排出。 An energy-saving hydraulic system, comprising: a power pump for driving a working fluid; a hydraulic actuator for the working fluid to flow in and generate an actuation function; a control valve, which is arranged between the power pump and the hydraulic actuator between and used to control the action of the hydraulic actuator; a proportional solenoid valve, arranged between the power pump and the hydraulic actuator and used to adjust the flow; a main line, connected with the power pump and the hydraulic actuator , the control valve and the proportional solenoid valve are connected, and the main line includes a first relief section connected between the power pump and the proportional solenoid valve, and a first overflow section connected between the proportional solenoid valve and the control valve a second overflow section; and an overflow unit, comprising a safety valve, a first branch channel connected between the first overflow section and the safety valve, a first flow channel connected between the second overflow section and the safety valve a second shunt channel between the valves, a first drainage channel connected to the safety valve and used for drainage, a second drainage channel connected between the second shunt channel and the first drainage channel, and a The check valve of the second drainage channel, the safety valve has a first interface connected with the first branch channel, and a second interface connected with the second branch channel. When the pressure reaches a first overflow threshold, the safety valve will be triggered and turned on, so that the working fluid flows into the first drainage channel from the first shunt channel and is discharged. When the pressure in the second overflow section reaches a When the second overflow threshold is reached, the check valve is triggered and turned on, so that the working fluid flows into the second drainage channel and the first drainage channel from the second shunt channel And discharge, and make the pressure at the second interface drop, when the pressure difference between the pressure at the first interface and the pressure at the second interface reaches a pressure difference threshold, the safety valve will be triggered to conduct , so that the working fluid flows into the first drainage channel through the first shunt channel and is discharged. 如請求項1所述的節能液壓系統，其中，該安全閥還具有一閥體、一設置在相反於該第一接口的一側並與該第一排水通道連接的排水接口、一連接於該第一接口與該排水接口之間的閥內通道、一連接於該第一接口與該閥內通道之間的偵壓通道、一第一擋止組，及一第二擋止組，該閥體界定出該第一接口、該第二接口、該排水接口、該閥內通道與該偵壓通道，該閥內通道具有一第一分流段，及一第二分流段，該第一分流段相鄰並連通於該偵壓通道，該第二分流段與該第一分流段相間隔且與該偵壓通道互不連通，該第一擋止組設置於該第一分流段與該偵壓通道的交界處，該第二擋止組設置於該第二分流段且部分埋設於該閥體。 The energy-saving hydraulic system according to claim 1, wherein the safety valve further has a valve body, a drain port arranged on a side opposite to the first port and connected to the first drain channel, and a drain port connected to the first port. The valve inner channel between the first interface and the drain interface, a pressure detection channel connected between the first interface and the valve inner channel, a first stop group, and a second stop group, the valve The body defines the first interface, the second interface, the drain interface, the valve inner channel and the pressure detection channel, the valve inner channel has a first splitting section, and a second splitting section, the first splitting section is adjacent and communicated with the pressure detection channel, the second diversion section is spaced from the first diversion section and is not communicated with the pressure detection channel, the first stop group is arranged between the first diversion section and the pressure detection channel At the junction, the second blocking group is disposed on the second branching section and partially embedded in the valve body. 如請求項2所述的節能液壓系統，其中，該安全閥的第一擋止組具有一由該偵壓通道凸伸至該第一分流段內的第一擋止件、一設置於該偵壓通道內並相鄰於該第二接口的抵靠件，及一連接於該第一擋止件與該抵靠件之間的第一彈簧，該抵靠件固定於該閥體且具有一由該第二接口的一側連通至該第一擋止件的一側的通孔，當該第一接口處的壓力與該第二接口處的壓力之間的壓力差抵達該壓差閾值時，該第一彈簧被壓縮並使得該第一擋止件縮入該偵壓 通道。 The energy-saving hydraulic system according to claim 2, wherein the first stopper group of the safety valve has a first stopper protruding from the pressure detection channel into the first diversion section, a first stopper disposed in the detection an abutting piece in the pressure channel and adjacent to the second interface, and a first spring connected between the first blocking piece and the abutting piece, the abutting piece is fixed to the valve body and has a A through hole communicated from one side of the second interface to one side of the first stopper, when the pressure difference between the pressure at the first interface and the pressure at the second interface reaches the pressure difference threshold , the first spring is compressed and makes the first stopper retract into the pressure detection aisle. 如請求項2所述的節能液壓系統，其中，該安全閥的第二擋止組具有一由該閥體凸伸至該第二分流段內的第二擋止件，及一連接於該第二擋止件與該閥體之間的第二彈簧，當該第一溢流段內的壓力抵達該第一溢流閾值時，該第二彈簧被壓縮並使得該第二擋止件縮入該閥體。 The energy-saving hydraulic system as claimed in claim 2, wherein the second stopper group of the safety valve has a second stopper protruding from the valve body into the second diversion section, and a second stopper connected to the first stopper. A second spring between the second stopper and the valve body, when the pressure in the first overflow section reaches the first overflow threshold, the second spring is compressed and makes the second stopper retract the valve body. 如請求項1所述的節能液壓系統，其中，該溢流單元還包括一設置於該第二分流通道的節流閥。 The energy-saving hydraulic system according to claim 1, wherein the overflow unit further comprises a throttle valve disposed in the second branch passage. 如請求項1所述的節能液壓系統，其中，該液壓致動器為液壓缸。 The energy-saving hydraulic system of claim 1, wherein the hydraulic actuator is a hydraulic cylinder. 如請求項1所述的節能液壓系統，其中，該控制閥為三位四通閥。 The energy-saving hydraulic system according to claim 1, wherein the control valve is a three-position four-way valve.
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CN107709796A (en) * 2015-06-25 2018-02-16 洋马株式会社 Hydraulic means
CN210531261U (en) * 2019-09-30 2020-05-15 广东联城住工装备信息科技有限公司 Hydraulic control system for vibration station and vibration table

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