WO2015024152A1 - 能源再生利用的液压控制主阀 - Google Patents

能源再生利用的液压控制主阀 Download PDF

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Publication number
WO2015024152A1
WO2015024152A1 PCT/CN2013/001430 CN2013001430W WO2015024152A1 WO 2015024152 A1 WO2015024152 A1 WO 2015024152A1 CN 2013001430 W CN2013001430 W CN 2013001430W WO 2015024152 A1 WO2015024152 A1 WO 2015024152A1
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WO
WIPO (PCT)
Prior art keywords
hole
valve
oil port
valve core
shoulder
Prior art date
Application number
PCT/CN2013/001430
Other languages
English (en)
French (fr)
Inventor
汪立平
卢强
陈展
刘红光
张国良
Original Assignee
江苏恒立液压有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CN201310363059.2A external-priority patent/CN104235096B/zh
Priority claimed from CN201320505987.3U external-priority patent/CN203488465U/zh
Application filed by 江苏恒立液压有限公司 filed Critical 江苏恒立液压有限公司
Priority to JP2015561877A priority Critical patent/JP6117385B2/ja
Priority to EP13891811.5A priority patent/EP2944828B1/en
Publication of WO2015024152A1 publication Critical patent/WO2015024152A1/zh
Priority to US14/818,331 priority patent/US9791056B2/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
    • F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
    • F16K11/06—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements
    • 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
    • F15B13/0401—Valve members; Fluid interconnections therefor
    • F15B13/0402—Valve members; Fluid interconnections therefor for linearly sliding valves, e.g. spool valves
    • F15B13/0403—Valve members; Fluid interconnections therefor for linearly sliding valves, e.g. spool valves a secondary valve member sliding within the main spool, e.g. for regeneration flow
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
    • F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
    • F16K11/06—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements
    • F16K11/065—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members
    • F16K11/07—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members with cylindrical slides
    • F16K11/0716—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members with cylindrical slides with fluid passages through the valve member
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/86493—Multi-way valve unit
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/86493—Multi-way valve unit
    • Y10T137/86574—Supply and exhaust
    • Y10T137/8667—Reciprocating valve
    • Y10T137/86694—Piston valve
    • Y10T137/86702—With internal flow passage

Definitions

  • the present invention relates to a hydraulic control main valve, and more particularly to a hydraulic control main valve for energy recycling. Background technique
  • the hydraulic control main valve is used, when the wide core is commutated to the R position:
  • the piston is subjected to the gravity of the mechanism and the material, and accelerates downward movement, on the one hand, the piston cavity The oil is quickly discharged.
  • the flow of p to the rodless chamber cannot be satisfied, which causes the piston to stall and the cylinder has insufficient cavities to form a vacuum.
  • the object of the present invention is to overcome the deficiencies of the prior art and to provide a hydraulically controlled main valve for energy recycling that utilizes the potential energy of the piston to be deflected by the mechanism and material gravity.
  • a hydraulic control main valve for energy recycling having an end cover, a valve core, a left one-way wide and a right one-way valve; both ends of the valve core are provided with _ -- End cap, the spool has left port T, port port ⁇ , port I/L, port I/M, port I/R, port B, right port T and port P; a spring and a spring seat are disposed between the end cover and the valve core; the left and right ends of the valve core are respectively embedded with a left check valve and a right check valve; the left check valve is a left valve seat and a left cone
  • the core and the left spring are composed; the tapered surface of the left cone valve core is closely attached to the left cone surface of the wide core by the action of the left spring; the right check valve is composed of a right valve seat, a right cone valve core and a right spring The tapered surface of the right poppet is closely attached to the right tapered surface of the spool by the action of the
  • the center line of the valve core of the above technical solution has a thick central hole symmetrically disposed on the left and right sides; the left and right thick central holes are connected by a fine central hole, and the intersection of the thick central hole and the thin central hole
  • the utility model has a frustum hole; a left oil inlet throttle groove and a right oil inlet throttle groove are arranged between the oil port P and the oil port I/M; a left side is arranged between the oil port A and the oil port I/L a throttle groove; a left oil return hole group composed of a left first throttle hole, a left second throttle hole and a left third throttle hole between the left port T and the port I/L;
  • the left second throttle hole communicates with the oil port A;
  • the right throttle groove is disposed between the oil port B and the oil port I/R; and the right oil port T and the oil port I/R are disposed between the right
  • the right throttle hole group, the right second throttle hole and the right third throttle hole comprise a right oil return hole group
  • the left valve seat is provided with a left first annular groove, a left second annular groove, a left first sealing groove and a left second sealing groove, and a left valve is provided on the center line of the left valve seat.
  • a left central ring hole the left first annular groove communicates with the left wide seat central hole through a radially disposed left wide seat radial hole;
  • the left first sealing groove and the left second sealing groove are respectively provided with a left sealing ring ;
  • the right valve seat is provided with a right first annular groove, a right second annular groove, a right first sealing groove and a right second sealing groove on the circumference of the right valve seat, and a right seat central hole is provided on the center line of the right valve seat
  • the right first annular groove communicates with the right valve seat central hole through the radially disposed right valve seat radial hole; and the right first sealing groove and the right second sealing groove are respectively provided with a right sealing ring.
  • a left spring hole and a left cone valve core hole are connected on a center line of the left cone valve core, and a left circular shoulder of a radial ring surface is arranged at a right end of the left cone valve core;
  • the shoulder has a radial hole in the radial direction of the left shoulder, and the right end of the left shoulder has a left shoulder tapered surface;
  • the left shoulder radial hole communicates with the left poppet hole;
  • the left shoulder tapered surface The angle is smaller than the angle of the frustum hole;
  • a right right spring hole and a right poppet valve core hole are disposed on a center line of the right poppet valve core, and a right annular shoulder of a right circular ring surface is disposed at a right end of the right poppet valve core; a right shoulder shoulder radial hole is provided, and a right shoulder shoulder has a right shoulder tapered surface; the right shoulder radial hole is connected with the right taper wide core hole; the right shoulder shoulder surface is smaller than the cone The angle of the hole.
  • the near left port T at the above technical solution has two left pressure relief oblique holes arranged symmetrically above and below; the near right oil port T has two right pressure relief oblique holes arranged symmetrically.
  • the present invention has the following positive effects:
  • the invention can be applied to loading a motorized arm cylinder, an excavator boom, an arm cylinder, etc., during the downward movement of the piston, the piston falling speed can be restricted, and the piston is subjected to the mechanism and material gravity.
  • the potential energy of the role is utilized to achieve energy recycling.
  • Figure 1 is a schematic structural view of the present invention
  • FIG. 2 is a schematic structural view of a valve body of the present invention
  • Figure 3 is a schematic structural view of a left valve seat of the present invention.
  • Figure 4 is a schematic structural view of a left poppet valve core of the present invention.
  • Figure 5 is a schematic structural view of a right valve seat of the present invention.
  • Figure 6 is a schematic structural view of a right poppet valve core of the present invention.
  • Figure 7 is a schematic structural view of the present invention.
  • the reference numerals are: end cap 1, spool 2, thick center hole 2-1, thin center hole 2-2, frustum hole 2-3, left inlet throttle slot 2-4, right inlet throttle slot 2-5, left throttle groove 2 6 , left first throttle hole 2-7, left second throttle hole 2-8, left third throttle hole 2-9, right throttle groove 2-10, right First orifice 2-11, right second orifice 2-12, right third orifice 2-13, left check valve 3, left valve seat 3-1, left first ring groove 3- 1-1, left second annular groove 3-1-2, left first sealing groove 3-1 3, left second sealing groove 3-1-4, left seat central hole 3-1-5, left valve Radial hole 3-1-6, left seal 3-1-7, left poppet 3-2, left spring hole 3-2-1, left poppet hole 3-2 2, left shoulder 3 -2-3, left shoulder radial hole 3-2-4, left spring 3 3, right one side ⁇ 4, right seat 4-1, right first ring groove 4 1 1 , right second ring Slot 4-1-2, right first seal groove 4-1-3, right second seal groove 4 1-4, right
  • a hydraulic control main energy recycling device has an end cover 1, a valve core 2, a left check valve 3 and a right check valve 4; the end of the valve core 2 is provided with an end cover 1, Spool 2 has left Port T, port port ⁇ , port I/L, port I/M, port I/R, port B, right port T and port port; between end cap 1 and spool 2 There are a spring 5 and a spring seat 6; the left and right ends of the valve core 2 are respectively embedded with a left check valve 3 and a right check valve 4; the left check valve 3 is composed of a left valve seat 3-1 and a left poppet valve core 3-2 And the left spring 3-3; the tapered surface of the left poppet 3-2 is closely attached to the left tapered surface of the valve core 2 by the action of the left spring 3-3; the right one-way wide 4 is the right seat 4-1
  • the right cone core 4-2 and the right spring 4-3 are composed; the tapered surface of the right cone core 4-2 is closely attached to the right cone surface
  • the center line of the core 2 has a thick central hole 2-1 arranged symmetrically left and right; the left and right two thick center holes 2-1 are connected by a thin center hole 2-2, and the thick center hole 2-1 and thin
  • the intersection of the center hole 2-2 has a frustum hole 2-3; between the oil port ⁇ and the port ⁇ / ⁇ , there are a left oil inlet throttle groove 2-4 and a right oil inlet throttle groove 2-5;
  • a left return oil hole group consisting of a hole 2-8 and a left third throttle hole 2-9; a left second throttle hole 2-8 communicating with the port A; a port B and a port I/R are provided between Right throttle groove 2-10; right first orifice T and oil port I/R are provided with right first orifice
  • the left seat ring 3-1 has a left first ring groove 3-1-1 and a left second ring groove.
  • left valve seat 3-1 has a left seat center hole 3-1-5 on the center line; left A circular groove 3 1 1 communicates with the left sill central hole 3-1-5 through two radially disposed radial holes 3 - 1-6 of the left seat; left first sealing groove 3-1-3 and left a sealing ring 3-1-7 is disposed in the second sealing groove 3-1-4;
  • the right first ring groove 4-1-1 and the right second ring groove are provided on the circumference of the right sill 4-1.
  • right first sealing groove 4-1 3 and right second sealing groove 4-1 4 right center seat 4-1 is provided with right valve seat center hole 4-1-5; right The first annular groove 4-1-1 is connected to the right seat central hole 4-1-5 through a radially disposed right seat radial hole 4-1-6; the right first sealing groove 4-1-3 Sealing rings 4-1-7 are provided in the right second sealing groove 4-1-4.
  • the left side of the left poppet 3-2 is provided with a connected left spring hole 3-2-1 and a left poppet valve.
  • the core hole 3-2-2, the left end of the left poppet valve 3-2 is provided with a radial torus left shoulder 3-2-3; the left shoulder 3-2-3 has a left platform in the radial direction Shoulder radial hole 3-2-4, left shoulder 3-2-3 has a left shoulder tapered surface at the right end; left shoulder radial hole 3- 2- 4 and left cone spool hole 3-2- 2 Connected; the angle of the left shoulder cone is smaller than the angle of the frustum hole;
  • the right poppet 4-2 has a right right spring hole 4-2-1 and a right poppet hole 4-2-2 on the center line, and the right poppet 4 2 has a right end.
  • the right shoulder of the radial torus is 4-2-3; the right shoulder 4-2-3 has two right shoulder radial holes 4-2-4, the right shoulder 4-2-3
  • the right end has a right shoulder tapered surface; the right shoulder radial hole 4-2-4 communicates with the right poppet hole 4-2-2; the right shoulder tapered surface has an angle smaller than the angle of the frustum hole.
  • the two left sealing rings 3-1-7 respectively respectively take the left first circular groove 3-1-1 and the left second ring Slot 3- 1-2 isolation, left second annular groove 3-1-2 and left throttle groove 2-6 isolated; two right sealing rings 4-1 -7 respectively right first circular groove 4_ 1- 1 is isolated from the right second annular groove 4-1-2, the right second annular groove 4-1-2 and the right throttle 2-10 are isolated; the left third orifice 2-9 is positive with the valve body
  • the overlap amount is L2
  • the positive overlap of the left pressure relief hole 7 and the valve body is L1;
  • Left shoulder radial hole 3-2-4 left seat center hole 3- 1 -5, two left seat radial hole 3-1-6, left pressure relief hole 7 through - channel; right first Throttle 2- 1 1, right throttle 2 - 10, right shoulder radial bore 4-2-4, right poppet bore 4-2-2, right seat central bore 4-1-5,
  • the working principle of the invention is:
  • the spool 2 is reversed to the L position.
  • the working principle is as follows: The oil port P passes through the oil inlet throttle groove 2-4, flows to the port I/L, and then flows into the port A through the throttle groove 2-6. A part of the oil can flow through the left third orifice 2-9, from the port I/L to the left throttle 2-6, and the oil is connected to the left cone by the left shoulder radial hole 3-2-4.
  • the port ⁇ passes through the right inlet throttle chute 2-5, flows to the port I/R, and then passes through the right chute 2-10 into the port, while a part of the oil
  • the liquid can flow from the port I/R to the right throttling groove 2-10 through the right first orifice 2-11, and the oil is connected to the right cone by the right shoulder radial hole 4-2-4.
  • the oil in the piston chamber of the cylinder returns to the A port, flows into the left second orifice 2-8, the left second ring groove 3-1-2, and flows through the left first orifice 2-7 to the port T.
  • the return oil produces a back pressure p L in the left first orifice 2-7, preventing the piston from stalling while the other part of the oil can pass through the left section.
  • the flow cell 2-6 flows from the port A to the left throttle groove 2, the right seat radial hole 4-1-6, the right shoulder radial hole 4-2-4, the left seat center hole 3- 1 5, the left first ring groove 3-1-1 finally flows to the oil port T through the right pressure relief hole 8 , this process, because the right shoulder radial hole 4-2-4 area is relatively small, so that The oil produces a back pressure ⁇ 2 in the radial hole 4-2-4 of the right shoulder, and the oil through the radial hole 4-2-4 of the right shoulder is also relatively small, and the left poppet hole 3-2- after that 2, left seat center hole 3 1-5, left first ring groove 3-1-1 finally through the right pressure relief hole 8 area than the right shoulder radial hole 4-2-4, the oil can basically The zero pressure flows back to the port ⁇ , so that the ring surface rl acts on the left poppet 3-2 under the action of ⁇ 2, so that the left spring 3 3 can be overcome, and the left cone valve
  • the tapered surface 32 on the 3-2 separates the tapered surface P1
  • the tapered surface P4 on the right poppet 4 2 is separated from the tapered surface P3 on the spool 2, and the oil in the thin central hole 2-2 can also pass.
  • pi cannot push the right side of the right poppet 4-2 against the right spring 4-3 to separate the tapered surface P4 on the right poppet 4-2 from the tapered surface P3 on the spool 2. Does not affect the fretting action of the cylinder.

Abstract

一种能源再生利用的液压控制主阀，具有端盖（1）、阀芯（2）、左单向阀（3）和右单向阀（4）；阀芯（2）的两端均设有一个端盖（1），阀芯（2）上具有左油口T、油口Α、油口I/L、油口I/M、油口I/R、油口B、右油口T和油口P；端盖（1）与阀芯（2）之间均设有弹簧（5）和弹簧座（6）；阀芯（2）的左右两端分别嵌有左单向阀（3）和右单向阀（4）；左单向阀（3）由左阀座（3-1）、左锥阀芯（3-2）和左弹簧（3-3）组成；左锥阀芯（3-2）的锥面通过左弹簧（3-3）的作用紧贴在阀芯（2）的左锥面上；右单向阀（4）由右阀座（4-1）、右锥阀芯（4-2）和右弹簧（4-3）组成；右锥阀芯（4-2）的锥面通过右弹簧（4-3）的作用紧贴在阀芯（2）的右锥面上。该液压控制主阀可限制活塞下落速度，把活塞受到机构及物料重力作用的势能利用起来，实现能源再生利用。

Description

能源再生利用的液压控制主阀 技术领域
本发明涉及一种液压控制主阀， 特别涉及一种能源再生利用的液压控 制主阀。 背景技术
现有技术中的液压控制主阀使用过程中， 当阔芯换向到 R位时： 活塞 向下运动的过程中， 活塞受到机构及物料重力作用， 会加速向下运动， 一 方面， 活塞腔的油液被快速排出， 另一方面， 加速向下运动时， p流向无杆 腔的流量却不能及吋满足， 这就会造成活塞失速下落及油缸有杆腔补油不 足形成真空的不利现象。 发明内容
本发明的目的是克服现有技术存在的缺陷， 提供一种可限制活塞下 落速度， 把活塞受到机构及物料重力作用的势能利用起来的能源再生利用 的液压控制主阀。
实现本发明目的的技术方案是： 一种能源再生利用的液压控制主阀， 具有端盖、 阀芯、 左单向阔和右单向阀； 所述阀芯的两端均设有 _ --个端盖， 阀芯上具有左油口 T、 油口 Α、 油口 I/L、 油口 I/M、 油口 I/R、 油口 B、 右 油口 T和油口 P; 所述端盖与阀芯之间均设有弹簧和弹簧座； 所述阀芯的左 右两端分别嵌有左单向阀和右单向阀； 所述左单向阀由左阀座、 左锥阔芯 和左弹簧组成； 所述左锥阀芯的锥面通过左弹簧的作用紧贴在阔芯的左锥 面上； 所述右单向阀 ώ右阀座、 右锥阀芯和右弹簧组成； 所述右锥阀芯的 锥面通过右弹簧的作用紧贴在阀芯的右锥面上。
上述技术方案所述阀芯的中心线上具有左右对称设置的粗中心孔； 所 述左右两粗中心孔之间通过细中心孔连通， 粗中心孔与细中心孔的交接处 具有锥台孔； 所述油口 P和油口 I/M之间设有左进油节流槽和右进油节流 槽； 所述油口 A和油口 I/L之间设有左节流槽； 所述左油口 T和油口 I/L 之间设有由左第一节流孔、 左第二节流孔和左第三节流孔组成的左回油孔 组； 所述左第二节流孔与油口 A相通； 所述油口 B与油口 I/R之间设有右 节流槽； 所述右油口 T和油口 I/R之间设有右第一节流孔、 右第二节流孔 和右第三节流孔组成的右回油孔组； 所述右第二节流孔和右第三节流孔均 与油口 B相通。
上述技术方案所述左阀座的圆周上设有左第一圆环槽、 左第二圆环槽、 左第一密封槽和左第二密封槽， 左阀座的中心线上设有左阀座中心孔； 所 述左第一圆环槽通过径向设置的左阔座径向孔与左阔座中心孔连通； 所述 左第一密封槽和左第二密封槽均设有左密封圈；
所述右阀座的圆周上设冇右第一圆环槽、 右第二圆环槽、 右第一密封 槽和右第二密封槽， 右阀座的中心线上设有右阀座中心孔； 所述右第一圆 环槽通过径向设置的右阀座径向孔与右阀座中心孔连通； 所述右第一密封 槽和右第二密封槽内均设有右密封圈。
上述技术方案所述左锥阀芯的中心线上设冇连通的左弹簧孔和左锥阀 芯孔， 左锥阀芯的右端设有一个径向圆环面的左台肩； 所述左台肩的径向 设有左台肩径向孔， 左台肩的右端具有一个左台肩锥面； 所述左台肩径向 孔与左锥阀芯孔连通； 所述左台肩锥面的角度小于锥台孔的角度；
所述右锥阀芯的中心线上设有连通的右弹簧孔和右锥阀芯孔， 右锥阀 芯的右端设有一个径向圆环面的右台肩； 所述右台肩的径向设有右台肩径 向孔， 右台肩的右端具有一个右台肩锥面； 所述右台肩径向孔与右锥阔芯 孔连通； 所述右台肩锥面的角度小于锥台孔的角度。
上述技术方案所述近左油口 T处具有两个上下对称设置的左泄压斜孔; 所述近右油口 T处具有两个上下对称设置的右泄压斜孔。
采用上述技术方案后， 本发明具有以下积极的效果：
本发明可以应用在装载机动臂油缸， 挖掘机动臂、 斗杆油缸等， 活塞 向下运动的过程中， 可以限制活塞下落速度， 把活塞受到机构及物料重力 作用的势能利用起来， 实现能源再生利用。 附图说明
为了使本发明的内容更容易被清楚地理解， 下面根据具体实施例并结 合附图， 对本发明作进一步详细的说明， 其中
图 1为本发明的结构示意图；
图 2为本发明的阀芯的结构示意图；
图 3为本发明的左阀座的结构示意图；
图 4为本发明的左锥阀芯的结构示意图；
图 5为本发明的右阀座的结构示意图；
图 6为本发明的右锥阀芯的结构示意图；
图 7为本发明的结构原理图；
附图标号为： 端盖 1、 阀芯 2、 粗中心孔 2-1、 细中心孔 2-2、 锥台孔 2-3、 左进油节流槽 2-4、 右进油节流槽 2-5、 左节流槽 2 6、 左第一节流孔 2-7、 左第二节流孔 2-8、 左第三节流孔 2-9、 右节流槽 2-10、 右第一节流 孔 2-11、右第二节流孔 2-12、右第三节流孔 2-13、左单向阀 3、左阀座 3-1、 左第一圆环槽 3-1-1、 左第二圆环槽 3-1-2、 左第一密封槽 3-1 3、 左第二 密封槽 3- 1-4、左阀座中心孔 3-1-5、左阀座径向孔 3-1-6、左密封圈 3-1-7、 左锥阀芯 3-2、 左弹簧孔 3-2-1、 左锥阀芯孔 3-2 2、 左台肩 3-2-3、 左台 肩径向孔 3-2-4、左弹簧 3 3、右单向闽 4、右阀座 4-1、右第一圆环槽 4 1 1、 右第二圆环槽 4-1-2、 右第一密封槽 4-1-3、 右第二密封槽 4 1-4、 右阀座 中心孔 4-1-5、 右阔座径向孔 4-1-6、 右密封圈 4- 1-7、 右锥阔芯 4-2、 右 弹簧孔 4-2-1、 右锥阀芯孔 4-2-2、 右台肩 4 2-3、 右台肩径向孔 4_2-4、 右弹簧 4-3、 弹簧 5、 弹簧座 6、 左泄压斜孔 7、 右泄压斜孔 8。 具体实施方式
(实施例 1 )
见图 1， 一种能源再生利用的液压控制主阔， 具有端盖 1、 阀芯 2、 左 单向阀 3和右单向阀 4 ; 阀芯 2的两端均设有一个端盖 1， 阀芯 2上具有左 油口 T、 油口 Α、 油口 I/L、 油口 I/M、 油口 I/R、 油口 B、 右油口 T和油口 Ρ; 端盖 1与阀芯 2之间均设有弹簧 5和弹簧座 6 ; 阀芯 2的左右两端分别 嵌有左单向阀 3和右单向阀 4 ; 左单向阀 3由左阀座 3-1、 左锥阀芯 3-2和 左弹簧 3-3组成；左锥阀芯 3-2的锥面通过左弹簧 3-3的作用紧贴在阀芯 2 的左锥面上； 右单向阔 4由右阀座 4-1、 右锥阔芯 4-2和右弹簧 4-3组成； 右锥闽芯 4-2的锥面通过右弹簧 4-3的作用紧贴在阔芯 2的右锥面上。 近 左油口 Τ处具有两个上下对称设置的左泄压斜孔 7 ;近右油口 Τ处具有两个 _ 下对称设置的右泄压斜孔 8 ;
见图 2， 闽芯 2的中心线上具有左右对称设置的粗中心孔 2-1 ; 左右两 粗中心孔 2-1之间通过细中心孔 2-2连通， 粗中心孔 2-1与细中心孔 2-2 的交接处具有锥台孔 2-3;油口 Ρ和油口 Ι/Μ之间设有左进油节流槽 2-4和 右进油节流槽 2-5 ; 油口 Α和油口 I/L之间设有左节流槽 2-6; 左油口 T和 油口 I/L之间设有由左第一节流孔 2-7、左第二节流孔 2-8和左第三节流孔 2-9组成的左回油孔组； 左第二节流孔 2- 8与油口 A相通； 油口 B与油口 I/R之间设有右节流槽 2-10; 右油口 T和油口 I/R之间设有右第一节流孔
2- 1 1、 右第二节流孔 2-12和右第三节流孔 2-13组成的右回油孔组； 右第 二节流孔 2-12和右第三节流孔 2-13均与油口 B相通。
见图 3， 左阀座 3-1的圆周上设有左第一圆环槽 3-1-1、 左第二圆环槽
3- 1-2、 左第一密封槽 3-1 3和左第二密封槽 3 1 4， 左阀座 3-1 的中心线 上设有左阀座中心孔 3-1-5;左第一圆环槽 3 1 1通过径向设置的两个左阀 座径向孔 3-1-6与左闽座中心孔 3-1-5连通； 左第一密封槽 3-1-3和左第 二密封槽 3-1-4内均设有密封圈 3-1-7 ;
见图 5， 右闽座 4-1的圆周上设有右第一圆环槽 4-1-1、 右第二圆环槽
4- 1-2、 右第一密封槽 4-1 3和右第二密封槽 4-1 4， 右阔座 4-1的中心线 上设有右阀座中心孔 4-1-5 ;右第一圆环槽 4-1-1通过径向设置的一个右阀 座径向孔 4-1-6与右阀座中心孔 4-1-5连通； 右第一密封槽 4-1-3和右第 二密封槽 4-1-4内均设有密封圈 4-1-7。
见图 4，左锥阀芯 3-2的中心线上设有连通的左弹簧孔 3-2-1和左锥阀 芯孔 3-2-2， 左锥阀芯 3- 2的右端设有一个径向圆环面的左台肩 3-2- 3 ; 左 台肩 3-2-3的径向设有一左台肩径向孔 3-2-4，左台肩 3-2-3的右端具有一 个左台肩锥面； 左台肩径向孔 3- 2- 4与左锥阀芯孔 3-2- 2连通； 左台肩锥 面的角度小于锥台孔的角度；
见图 6，右锥阀芯 4-2的中心线上设有连通的右弹簧孔 4-2-1和右锥阀 芯孔 4-2-2， 右锥阀芯 4 2的右端设有一个径向圆环面的右台肩 4- 2-3 ; 右 台肩 4-2-3的径向设有两个右台肩径向孔 4-2-4，右台肩 4-2-3的右端具有 一个右台肩锥面； 右台肩径向孔 4-2-4与右锥阀芯孔 4-2-2连通； 右台肩 锥面的角度小于锥台孔的角度。
阀心 2内两侧各安装左单向阔 3和右单向阀 4后，两个左密封圈 3-1-7 分别把左第一圆环槽 3-1 -1 和左第二圆环槽 3- 1-2 隔绝、 左第二圆环槽 3-1-2和左节流槽 2-6隔绝;两个右密封圈 4-1 -7分别把右第一圆环槽 4_ 1-1 和右第二圆环槽 4-1-2隔绝、 右第二圆环槽 4- 1-2和右节流槽 2-10隔绝； 左第三节流孔 2-9与阀体的正重叠量为 L2， 左泄压斜孔 7与阀体的正重叠 量为 L1 ; 左第三节流孔 2-9， 左节流槽 2-6， 左锥阀芯孔 3- 2- 2, 左台肩径 向孔 3-2-4， 左阀座中心孔 3- 1 -5,两左阀座径向孔 3-1-6,左泄压斜孔 7通 成 -通道； 右第一节流孔 2- 1 1， 右节流槽 2- 10， 右台肩径向孔 4-2-4， 右 锥阀芯孔 4-2-2， 右阀座中心孔 4-1-5，右阀座径向孔 4-1 6,右泄压斜孔 8 也通成一通道。
本发明的工作原理为：
阀芯 2换向到 L位吋： 工作原理如下： 油口 P通过进油节流槽 2-4， 流 到油口 I/L处， 再经过节流槽 2-6流入油口 A， 同时一部分油液可通过左第 三节流孔 2-9,从油口 I/L处流入到左节流槽 2-6处， 油液由左台肩径向孔 3-2-4连通左锥阀芯孔 3-2-2， 左阀座中心孔 3-1-5， 左阀座径向孔 3-1 - 6， 左第一圆环槽 3-1-1， 左泄压斜孔 7，并被封堵住， 油口 工 /L处到左泄压斜 孔 7压力大小相等， 山于左锥阀芯 3-2圆截面 r3比圆环面 r l大得多， 所 以左锥阀芯 3 2上的锥面被紧紧推向并紧贴在阀芯 2 的锥面上， 从油口 P 可靠地作用到油缸无杆腔上， 推到油缸活塞向上运动； 油缸活塞杆腔的油 液回流到油口 B， 流入右第二节流孔 2-12， 右第一圆环槽 4 1-1 ,通过右第 三节流孔 2-13流到油口 T,另一部分油液可通过右第一节流孔 2-11从油口 B流到右节流槽 2-10， 右台肩径向孔 4- 2 4, 右锥阀芯孔 4-2-2， 右阀座中 心孔 4-卜 5，最后通过右泄压斜孔 8流到油口 T， 这一过程， 右锥阀芯 4-2 上的锥面紧贴在阀芯 2的锥面上。
阁芯 2换向到 R位时：油口 Ρ通过右进油节流槽 2-5 ,流到油口 I/R处， 再经过右节流槽 2-10流入油口 Β， 同时一部分油液可通过右第一节流孔 2-11 ，从油口 I/R处流入到右节流槽 2-10处， 油液再由两右台肩径向孔 4-2-4连通右锥阀芯孔 4-2-2， 右阀座中心孔 4 1-5， 右阀座径向孔 4-1-6, 右第二圆环槽 4-1-2， 右泄压斜孔 8,最后流到油箱， 由于两右台肩径向孔 4-2- 面积比右阀座径向孔 4-1-6大，这一部分的油液基本只在右阀座径向 孔 4-1- 6的前端产生相同的压力， 由于作用在右锥阀芯 4-2的圆截面 r4， 作用在右锥阀芯 4-2的圆环面 r2上的液压力方向及右弹簧 4-3都是把右锥 阀芯 4-2上的锥面 P2紧紧推向并紧贴在阀芯 2的锥面 P4上。 使油口 P的 油液只作用到油缸活塞杆杆腔上， 推动油缸活塞向下运动；
油缸活塞腔的油液回流到 A油口， 流入左第二节流孔 2-8， 左第二圆环 槽 3- 1-2,通过左第一节流孔 2-7流到油口 T， 通过限制左第一节流孔 2 - 7 过流面积，使回油在左第一节流孔 2-7产生一个背压 p L，防止活塞失速下落， 同时另一部分油液可通过左节流槽 2-6从油口 A处流到左节流槽 2 6，右阀 座径向孔 4-1-6, 右台肩径向孔 4-2-4， 左阀座中心孔 3-1 5, 左第一圆环 槽 3-1-1最后通过右泄压斜孔 8流到油口 T， 这一过程， 由于右台肩径向孔 4-2-4面积比较小， 使回油在右台肩径向孔 4-2-4产生一个背压 ρ2，通过右 台肩径向孔 4-2-4的油液也比较小，而此后的左锥阀芯孔 3-2-2， 左阀座中 心孔 3 1-5， 左第一圆环槽 3-1-1最后通过右泄压斜孔 8面积都比右台肩径 向孔 4-2-4， 油液基本可以零压力流回油口 Τ， 这样， 作用在左锥阀芯 3-2 上圆环面 rl在 ρ2的作用下， 便可以克服左弹簧 3 3， 使左锥阀芯 3-2上的 锥面 Ρ2分离阀芯 2的锥面 Pl， 左节流槽 2-6的油液便可以以 pi的压力流 向细中心孔 2-2， (C4 ? ) pi作用在右锥阔芯 4-2左端面上克服右弹簧 4-3 使右锥阀芯 4 2上的锥面 P4分离阀芯 2上的锥面 P3，细中心孔 2-2中的油 液也就可以通过右节流槽 2-10， 右第一节流孔 2-11， 最终流入到油口 B, 与油口 P 的油液 -起推动活塞向下运动， 实现了能源再生， 减小了发动机 功率。 当下降速度比较慢时， pi便不可以推动右锥阀芯 4-2左端面上克服 右弹簧 4-3使右锥阀芯 4- 2上的锥面 P4分离阀芯 2上的锥面 P3，不影响油 缸的微动动作。
以上所述的具体实施例， 对本发明的目的、 技术方案和有益效果进行 了进一步详细说明， 所应理解的是， 以上所述仅为本发明的具体实施例而 己， 并不用于限制本发明， 凡在本发明的精神和原则之内， 所做的任何修 改、 等同替换、 改进等， 均应包含在本发明的保护范围之内。

Claims

权 利 要 求 书
1、 一种能源再生利用的液压控制主阀， 其特征在于： 具有端盖 （1)、 阀芯 （2)、 左单向阀 （3) 和右单向阀 （4); 所述阀芯 （2) 的两端均设有 一个端盖 （1)， 阀芯 （2) 上具有左油口 T、 油口 Α、 油口 I/L、 油口 I/M、 油口 I/R、 油口 B、 右油口 T和油口 P; 所述端盖 （1) 与阀芯 （2) 之间均 设有弹簧 （5) 和弹簧座 （6); 所述阀芯 （2) 的左右两端分别嵌有左单向 阀 （3) 和右单向阀 （4); 所述左单向阀 （3) 由左阀座 （3-1)、 左锥阔芯
(3-2)和左弹簧（3-3)组成；所述左锥阔芯（3-2)的锥面通过左弹簧（3-3) 的作用紧贴在阀芯 （2) 的左锥面上； 所述右单向阀 （4) 由右阀座 （4-1)、 右锥阀芯 （4-2) 和右弹簧 （4-3) 组成； 所述右锥阀芯 （4-2) 的锥面通过 右弹簧 （4-3) 的作用紧贴在阀芯 （2) 的右锥面上。
2、根据权利要求 1所述的能源再生利用的液压控制主阀，其特征在于： 所述阀芯 （2) 的中心线上具有粗中心孔 （2-1); 所述左右粗中心孔 （2-1) 之间通过细中心孔 (2-2) 连通， 粗中心孔 (2-1) 与细中心孔 (2-2) 的交 接处具有锥台孔 (2-3);所述油口 P和油口 I/M之间设有左进油节流槽 (2-4) 和右进油节流槽 (2-5)； 所述油口 A和油口 I/L之间设有左节流槽 (2-6)； 所述左油口 T和油口 I/L之间设有由左第一节流孔 （2-7)、 左第二节流孔
(2-8)和左第三节流孔（2-9)组成的左回油孔组；所述左第二节流孔（2-8) 与油口 A相通； 所述油口 B与油口 I/R之间设有右节流槽 （2-10); 所述右 油口 T和油口 I/R之间设有右第一节流孔 （2-11)、 右第二节流孔 （2-12) 和右第三节流孔 （2-13) 组成的右回油孔组； 所述右第二节流孔 （2-12) 和右第三节流孔 (2-13) 均与油口 B相通。
3、根据权利要求 2所述的能源再生利用的液压控制主阀，其特征在于： 所述左阔座 （3-1) 的圆周上设有左第一圆环槽 （3-1-1)、 左第二圆环槽
(3-1-2)、 左第一密封槽 (3-1-3)和左第二密封槽 (3-1-4), 左阀座 (3-1) 的中心线上设有左阀座中心孔 （3-1-5); 所述左第一圆环槽 （3-1-1) 通过 径向设置左阀座径向孔 （3-1-6) 与左阔座中心孔 （3 1-5) 连通； 所述左 第一密封槽（3-1-3)和左第二密封槽（3-1-4)内均设有左密封圈（3-1-7); 所述右阀座 （4-1) 的圆周上设有右第- 圆环槽 （4-1-1)、 右第二圆环 槽（4-1-2)、右第一密封槽（4- 1-3)和右第二密封槽（4-1-4)，右阀座（4 - 1) 的中心线上设有右阀座中心孔 （4-1-5); 所述右第一圆环槽 （4-1-1) 通过 径向设置右闽座径向孔 （4-1-6) 与右阀座中心孔 （4-1-5) 连通； 所述右 第一密封槽（4-1-3)和右第二密封槽（4-1-4)内均设有右密封圈（4-1-7)。
4、根据权利要求 3所述的能源再生利用的液压控制主阀，其特征在于： 所述左锥阔芯 （3-2) 的中心线上设有连通的左弹簧孔 (3-2-1) 和左锥阀 芯孔 （3 2 2)， 左锥阀芯 （3-2) 的右端设有一个径向圆环面的左台肩
(3-2-3)； 所述左台肩 （3-2-3) 的径向设左台肩径向孔 （3-2-4)， 左台肩 (3-2-3) 的右端具有一个左台肩锥面； 所述左台肩径向孔 （3-2-4) 与左 锥阀芯孔 （3-2 2) 连通； 所述左台肩锥面的角度小于锥台孔的角度；
所述右锥阀芯 （4-2) 的中心线上设有连通的右弹簧孔 （4-2-1) 和右 锥阀芯孔 （4-2-2)， 右锥阔芯 （4-2) 的右端设有一个径向圆环面的右台肩 (4-2-3)； 所述右台肩 （4-2-3) 的径向设有右台肩径向孔 （4-2-4)， 右台 肩 （4-2-3) 的右端具有右台肩锥面； 所述右台肩径向孔 （4-2 4) 与右锥 阀芯孔 （4-2 2) 连通； 所述右台肩锥面的角度小于锥台孔的角度。
5、根据权利要求 4所述的能源再生利用的液压控制主阀，其特征在于： 所述近左油口 T处具有左泄压斜孔 （7); 所述近右油口 T处具有右泄压斜 孔 （8)。
PCT/CN2013/001430 2013-08-19 2013-11-22 能源再生利用的液压控制主阀 WO2015024152A1 (zh)

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