WO2016125276A1 - Soupape de commande à entraînement électromagnétique - Google Patents

Soupape de commande à entraînement électromagnétique Download PDF

Info

Publication number
WO2016125276A1
WO2016125276A1 PCT/JP2015/053191 JP2015053191W WO2016125276A1 WO 2016125276 A1 WO2016125276 A1 WO 2016125276A1 JP 2015053191 W JP2015053191 W JP 2015053191W WO 2016125276 A1 WO2016125276 A1 WO 2016125276A1
Authority
WO
WIPO (PCT)
Prior art keywords
coil
valve body
spool valve
solenoid
pressure passage
Prior art date
Application number
PCT/JP2015/053191
Other languages
English (en)
Japanese (ja)
Inventor
仁美 飯泉
Original Assignee
株式会社 島津製作所
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
Application filed by 株式会社 島津製作所 filed Critical 株式会社 島津製作所
Priority to JP2016573001A priority Critical patent/JP6455531B2/ja
Priority to PCT/JP2015/053191 priority patent/WO2016125276A1/fr
Publication of WO2016125276A1 publication Critical patent/WO2016125276A1/fr

Links

Images

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
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
    • F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid

Definitions

  • the present invention relates to an electromagnetically driven control valve used in a hydraulic circuit of an industrial vehicle or the like.
  • control valves that are widely used as those mounted on industrial vehicles such as forklifts include the following.
  • This control valve includes a housing, a spool valve body that can advance and retreat in a spool hole provided in the housing, and a solenoid for driving the spool valve body.
  • the housing includes a high pressure passage communicating with a pump as a working fluid supply source, a low pressure passage communicating with a tank for storing working fluid, and a cylinder head of a hydraulic actuator for raising and lowering a lift as a driving target.
  • a cylinder port communicating with the cylinder is provided. The spool hole communicates with the high pressure passage, the low pressure passage and the cylinder port.
  • the spool valve body communicates the neutral position that blocks the high-pressure passage, the low-pressure passage, and the cylinder port, the raised position that communicates the high-pressure passage and the cylinder port, and the low-pressure passage and the cylinder port. Take one of the lowered positions.
  • the solenoid is provided at both ends of the spool valve body, and includes a coil, a plunger that is attracted by magnetism generated inside the coil when the coil is energized and presses the spool valve body, and a spool when not energized.
  • a compression coil spring that biases the valve body toward the neutral position.
  • Such a control valve is used together with an operation unit such as a joystick provided outside and a control device that receives an input of an opening degree instruction signal output from the operation unit.
  • the opening degree instruction signal indicates an operation amount for the operation unit.
  • the control device receives an input of the opening instruction signal and performs control to output an excitation current having a strength corresponding to the opening instruction signal to the solenoid.
  • the correction of the deviation between the intensity of the excitation current and the actual movement amount of the spool valve body is performed by separately measuring the movement amount of the spool valve body and correcting the excitation current based on the measurement result.
  • no device or mechanism for directly determining the amount of movement of the spool valve body has been considered.
  • the problems described above are not limited to the control valve used in the hydraulic circuit for raising and lowering the lift, but the electromagnetically driven control used in the hydraulic circuit configured to move the spool valve body using a solenoid. Present in all valves.
  • the amount of movement of a spool valve body is directly obtained without adding a special circuit or the like.
  • the intended purpose is to make it possible to correct the magnitude of the current applied to the spool valve body so that the flow rate control can be performed.
  • the electromagnetically driven control valve according to the present invention has a configuration as described below. That is, the electromagnetically driven control valve according to the present invention includes a high pressure passage communicating with a hydraulic pressure supply source, a low pressure passage communicating with a tank, at least one port communicating with an actuator that is a driving target, and these high pressure passage and low pressure passage. And a housing having a spool hole communicating with the port, a spool valve body capable of moving back and forth in the spool hole of the housing, and energizing the coil to attract the plunger to the coil and press the spool valve body by the plunger.
  • the movement amount of the spool valve body can be directly obtained without adding a special circuit or the like.
  • the magnitude of the current applied to the spool valve body can be corrected so as to enable the target flow rate control.
  • FIG. 3 is a functional block diagram of a circuit including a solenoid and a control device according to the embodiment.
  • the flowchart which shows the procedure of the control which the control apparatus which concerns on the same embodiment performs.
  • the control valve according to the present embodiment is connected to a cylinder of a hydraulic actuator A that drives a lift L of a forklift, for example, and can move forward and backward within the housing 1 and the spool hole 1e of the housing 1 as shown in FIG.
  • a spool valve body 2 capable of taking a neutral position, a raised position spaced from the neutral position to one side, and a lowered position spaced from the neutral position to the other, and both ends of the spool valve body 2 And a solenoid 3 for driving the spool valve body 2.
  • control valve moves the spool valve body 2 using the solenoid 3, thereby allowing the flow rate between the high pressure passage 1a or the low pressure passage 1b and the first cylinder port 1c or the second cylinder port 1d.
  • the housing 1 includes a high pressure passage 1a communicating with a pump P as a working fluid supply source, a low pressure passage 1b communicating with a tank T for storing working fluid, and a first communicating with a cylinder head A1.
  • the spool valve body 2 can advance and retreat in the spool hole 1e of the housing 1 as described above. In the neutral position, the spool valve body 2 blocks between the high-pressure passage 1a and the low-pressure passage 1b and the first and second cylinder ports 1c and 1d.
  • the spool valve body 2 includes first and second annular grooves 2a and 2b on the outer peripheral portion. The first annular groove 2a communicates the high pressure passage 1a with the first cylinder port 1c when taking the raised position displaced from the neutral position to one side, and the low pressure passage 1b taking the lowered position displaced to the other side. And the first cylinder port 1c are communicated.
  • the second annular groove 2b communicates the low pressure passage 1b with the second cylinder port 1d when taking the raised position displaced from the neutral position to one side, and the high pressure passage 1a when taking the lowered position displaced to the other side. And the second cylinder port 1d are communicated with each other.
  • the solenoid 3 includes a coil 31, a plunger 32 that is arranged inside the coil 31, is attracted to the coil 31 when the coil 31 is energized, and presses the spool valve body 2.
  • a case 33 that houses the coil 31 and the plunger 32, a cap 34 that is provided at the outer end of the case 33 to prevent the plunger 32 from falling off, and the coil 31, the case 33, and the cap 34 are fixed to the housing 1.
  • a male screw portion 35 is fixed to the housing 1.
  • the solenoid 3 includes a compression coil spring 36 having a free end side disposed in the case 33 and a moving end side facing the spool valve body 2. The compression coil spring 36 urges the spool valve body 2 toward the neutral position when the coil 31 is not energized.
  • the spool valve body 2 When the coil 31 of any solenoid 3 is not energized, the spool valve body 2 is maintained in the neutral position by the action of the compression coil springs 36 on both sides.
  • the plunger 31 When the coil 31 of the solenoid 3 on the left side in FIG. 1 is energized, the plunger 31 is attracted by the coil 31, and the plunger 32 presses the spool valve body 2, whereby the spool valve body 2 moves to the raised position. .
  • the plunger 31 of the solenoid 3 on the right side in FIG. 1 When the coil 31 of the solenoid 3 on the right side in FIG. 1 is energized, the plunger 31 is attracted by the coil 31 and the plunger 32 presses the spool valve body 2 so that the spool valve body 2 is lowered. Move to.
  • the coil 31 of the solenoid valve 3 is connected to the power supply device 4 as shown in FIG.
  • the power supply device 4 superimposes a direct current for driving the spool valve body 2 and an alternating current for preventing the spool valve body 2 from adhering to the coil 31.
  • the alternating current is smaller than the direct current.
  • the power supply device 4 receives an excitation current signal a indicating the intensity of the direct current to be applied to the coil 31 from the control device 5.
  • the control device 5 accepts an input of an opening degree instruction signal b indicating an operation amount for the joystick from a joystick (not shown) which is an operation unit provided in a driver's seat or the like.
  • the inductive reactance of the coil 31 changes and the intensity of the alternating current flowing through the coil 31 also changes proportionally.
  • the position of the spool valve body 2 is detected as follows using this fact.
  • the control device 5 uses what is known as a microcomputer system having a CPU, a memory, an input / output interface, and the like.
  • the CPU reads and executes a program stored in a predetermined area of the memory. It works by doing.
  • the control device 5 includes an AC component detection unit 51 that extracts an AC component from the current flowing through the coil 31. Then, the control device 5 reads and executes the program by the CPU, so that an inductive reactance detecting unit that obtains an inductive reactance using the AC component strength of the current extracted by the AC component detecting unit 51 as a parameter. 52 and a position detecting unit 53 for determining the position of the plunger 32 of the solenoid 3 based on the inductive reactance detected by the inductive reactance detecting unit 52.
  • the AC voltage applied to the coil 31 by the power supply device 4 the frequency of the alternating current supplied by the power supply device 4, and the electrical resistance of the coil 31 are known.
  • the strength of the alternating current detected by the alternating current component detector 51 is an amount proportional to the strength of the current passing through the coil 31, and that the magnetic flux inside the coil 31 corresponds to the position of the spool valve body 2. is doing.
  • the inductive reactance corresponding to the position of the representative spool valve element 2 is measured in advance and stored as a position table. When used, the inductive reactance is used as a parameter to refer to the position table for interpolation. By calculating, the position of the spool valve body 2 is detected.
  • the control device 5 calculates the difference between the position of the spool valve body 2 corresponding to the opening degree instruction signal b from the operation section and the position of the spool valve body 2 obtained by the position detection section 53, and the coil of the solenoid 3 It also has a function as a correction control unit 54 that corrects the magnitude of the direct current applied to 31 and outputs it as an excitation current signal a.
  • FIG. 4 is a flowchart.
  • a signal from the operation unit is received, and a DC voltage having a magnitude corresponding to the received signal and an AC voltage having a predetermined magnitude are superimposed and applied to the coil 31 of the solenoid 3 (S1).
  • the DC voltage from the smoothing circuit is received (S2), and the inductive reactance of the coil 31 is obtained using the received DC voltage as a parameter (S3).
  • the position of the spool valve body 2 is obtained by referring to the position table using the obtained inductive reactance as a parameter (S4).
  • step S5 the difference between the position of the spool valve body 2 corresponding to the signal from the operation section and the position of the spool valve body 2 obtained in step S4 is calculated (S5), and the magnitude of the direct current applied to the coil 31 of the solenoid 3 is calculated. Is corrected (S6).
  • the inductive reactance of the coil 31 is proportional to the change of the magnetic flux inside the coil 31 with the movement of the plunger 32 while diverting the alternating current for preventing the spool valve body 2 from sticking.
  • the inductive reactance of the coil 31 can be detected, and the position of the plunger 32 can be obtained based on the detected inductive reactance. That is, the position of the plunger 32 can be obtained without adding a special circuit or the like. Then, the deviation between the obtained position of the plunger 32 and the position of the plunger 32 corresponding to the operation amount with respect to the operation unit is obtained, and the intensity of the excitation current applied to the coil 31 is corrected to reduce the deviation, thereby further operating.
  • the position control of the spool valve body 2 reflecting the person's intention can be performed.
  • the electromagnetically driven control valve of the present invention is used in the hydraulic circuit for supplying hydraulic fluid to the actuator for raising and lowering the lift of the forklift, but the forklift mast is tilted back and forth.
  • the electromagnetically driven control valve of the present invention may be used in a hydraulic circuit for supplying hydraulic fluid to an actuator for the purpose.
  • the present invention may be applied to all electromagnetically driven control valves that use a solenoid to move the spool valve body.
  • an electromagnetically driven control valve that controls the flow rate by energizing the solenoid based on the operation amount received by the operation unit, it is possible to control the flow rate as desired by directly obtaining the movement amount of the spool valve element. Therefore, a configuration for correcting the magnitude of the current applied to the spool valve body can be realized.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Magnetically Actuated Valves (AREA)

Abstract

Soupape de commande à entraînement électromagnétique pourvue : d'un boîtier renfermant un passage haute-pression qui est en communication avec une source d'alimentation à pression hydraulique, un passage basse-pression qui est en communication avec un réservoir, au moins un orifice qui est en communication avec un actionneur qui est entraîné, et un trou de bobine qui est en communication avec lesdits passage haute-pression, passage basse-pression et un orifice; d'un corps de soupape de bobine qui peut se déplacer en va-et-vient à l'intérieur du trou de bobine dudit boîtier; d'un solénoïde pour tirer un piston-plongeur vers une bobine grâce au passage de l'électricité dans la bobine et au pressage et à l'entraînement du corps de soupape de bobine à l'aide du piston-plongeur; d'un dispositif de source d'énergie électrique pour superposer un courant continu destiné à entraîner le corps de soupape de bobine sur un courant alternatif pour empêcher l'adhérence du corps de soupape de bobine et appliquer celui-ci sur la bobine du solénoïde; d'une unité de détection de réactance induite destinée à détecter la réactance induite de la bobine du solénoïde; et d'une unité de détection de position destinée à déterminer la position du piston du piston-plongeur de solénoïde sur la base de la réactance induite détectée par ladite unité de détection de réactance induite.
PCT/JP2015/053191 2015-02-05 2015-02-05 Soupape de commande à entraînement électromagnétique WO2016125276A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2016573001A JP6455531B2 (ja) 2015-02-05 2015-02-05 電磁駆動式コントロールバルブ
PCT/JP2015/053191 WO2016125276A1 (fr) 2015-02-05 2015-02-05 Soupape de commande à entraînement électromagnétique

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2015/053191 WO2016125276A1 (fr) 2015-02-05 2015-02-05 Soupape de commande à entraînement électromagnétique

Publications (1)

Publication Number Publication Date
WO2016125276A1 true WO2016125276A1 (fr) 2016-08-11

Family

ID=56563640

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2015/053191 WO2016125276A1 (fr) 2015-02-05 2015-02-05 Soupape de commande à entraînement électromagnétique

Country Status (2)

Country Link
JP (1) JP6455531B2 (fr)
WO (1) WO2016125276A1 (fr)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02110781U (fr) * 1989-02-21 1990-09-05
JPH05236720A (ja) * 1992-02-21 1993-09-10 Canon Inc 駆動装置及びその制御方法
JPH0914486A (ja) * 1995-06-29 1997-01-14 Uchida Yuatsu Kiki Kogyo Kk 電磁比例制御弁の駆動制御装置及びその駆動制御方法
JP2000170950A (ja) * 1998-12-10 2000-06-23 Tokimec Inc 電磁方向切換弁の電気駆動方法
JP2001027359A (ja) * 1999-07-14 2001-01-30 Smc Corp 位置検出機能付き切換弁
JP2008145396A (ja) * 2006-12-13 2008-06-26 Honda Motor Co Ltd 被駆動体の位置検出装置
JP2013024254A (ja) * 2011-07-15 2013-02-04 Kawasaki Heavy Ind Ltd 電磁比例制御弁

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19518056B4 (de) * 1995-05-17 2005-04-07 Fev Motorentechnik Gmbh Einrichtung zur Steuerung der Ankerbewegung einer elektromagnetischen Schaltanordnung und Verfahren zur Ansteuerung
SE0501531L (sv) * 2005-07-01 2007-01-02 Haldex Traction Ab Metod, anordning och system

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02110781U (fr) * 1989-02-21 1990-09-05
JPH05236720A (ja) * 1992-02-21 1993-09-10 Canon Inc 駆動装置及びその制御方法
JPH0914486A (ja) * 1995-06-29 1997-01-14 Uchida Yuatsu Kiki Kogyo Kk 電磁比例制御弁の駆動制御装置及びその駆動制御方法
JP2000170950A (ja) * 1998-12-10 2000-06-23 Tokimec Inc 電磁方向切換弁の電気駆動方法
JP2001027359A (ja) * 1999-07-14 2001-01-30 Smc Corp 位置検出機能付き切換弁
JP2008145396A (ja) * 2006-12-13 2008-06-26 Honda Motor Co Ltd 被駆動体の位置検出装置
JP2013024254A (ja) * 2011-07-15 2013-02-04 Kawasaki Heavy Ind Ltd 電磁比例制御弁

Also Published As

Publication number Publication date
JPWO2016125276A1 (ja) 2017-10-19
JP6455531B2 (ja) 2019-01-23

Similar Documents

Publication Publication Date Title
EP3546761B1 (fr) Surpresseur
JP5331986B2 (ja) 流体圧機器の駆動検出回路及び駆動検出方法
JP6310083B2 (ja) 負荷保持弁
JP2016508475A (ja) クランプ面位置決めシステム
KR20070010134A (ko) 경전제어신호의 보정방법, 경전제어장치, 건설기계 및경전제어신호 보정용 프로그램
AU2009257934B2 (en) Solenoid valve
JP2016142285A5 (fr)
US20190116718A1 (en) Working machine lifting control device
WO2017038626A1 (fr) Dispositif de détection d'anomalie
JP6406574B2 (ja) 電磁弁制御装置、コントロールバルブ装置、および電磁弁制御方法
JP6455531B2 (ja) 電磁駆動式コントロールバルブ
RU2017122447A (ru) Гидравлический контур тормозов прицепа для регулируемого коэффициента усиления и улучшенной стабильности
US7201096B2 (en) Linear motor having a magnetically biased neutral position
CN115989379A (zh) 具有位置监测机构和液压控制系统的液压插装阀和方法
JP4443280B2 (ja) ソレノイドのプランジャ位置検出装置および電磁弁および方向切換弁
US10119249B2 (en) Control device for confluence flow rate of working device for construction machinery and control method therefor
US11442478B2 (en) Pressure control device
CN111316387A (zh) 控制装置及铁道车辆用减振装置
JP2005317612A (ja) ソレノイドのプランジャ位置検出装置およびソレノイドのプランジャ位置検出方法
CN112236610A (zh) 电磁阀和空气分流阀
KR20190085104A (ko) 증압장치
JP2005299450A (ja) ポンプ制御装置
CN107209510B (zh) 用于识别特性曲线的方法
WO2016117063A1 (fr) Vanne de commande
JP2017539025A5 (fr)

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 15881093

Country of ref document: EP

Kind code of ref document: A1

ENP Entry into the national phase

Ref document number: 2016573001

Country of ref document: JP

Kind code of ref document: A

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 15881093

Country of ref document: EP

Kind code of ref document: A1