EP2944818B1 - Leistungsregelungsvorrichtung für eine kolbenpumpe und steuerungsverfahren dafür - Google Patents

Leistungsregelungsvorrichtung für eine kolbenpumpe und steuerungsverfahren dafür Download PDF

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Publication number
EP2944818B1
EP2944818B1 EP13897807.7A EP13897807A EP2944818B1 EP 2944818 B1 EP2944818 B1 EP 2944818B1 EP 13897807 A EP13897807 A EP 13897807A EP 2944818 B1 EP2944818 B1 EP 2944818B1
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EP
European Patent Office
Prior art keywords
valve
spring
cavity
oil
valve sleeve
Prior art date
Legal status (The legal status 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 status listed.)
Active
Application number
EP13897807.7A
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English (en)
French (fr)
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EP2944818A1 (de
EP2944818A4 (de
Inventor
Liping Wang
Tong Li
Haiming HUA
Dachao LIN
Lei Wei
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Jiangsu Hengli Hydraulic Technology Co Ltd
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Jiangsu Hengli Hydraulic Technology Co Ltd
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Filing date
Publication date
Priority claimed from CN201310590024.2A external-priority patent/CN104234992B/zh
Priority claimed from CN201320740091.3U external-priority patent/CN203627179U/zh
Application filed by Jiangsu Hengli Hydraulic Technology Co Ltd filed Critical Jiangsu Hengli Hydraulic Technology Co Ltd
Publication of EP2944818A1 publication Critical patent/EP2944818A1/de
Publication of EP2944818A4 publication Critical patent/EP2944818A4/de
Application granted granted Critical
Publication of EP2944818B1 publication Critical patent/EP2944818B1/de
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/22—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by means of valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B2205/00—Fluid parameters
    • F04B2205/04—Pressure in the outlet chamber
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/08—Regulating by delivery pressure

Definitions

  • the present disclosure generally relates to the technical field of machine manufacturing, and more particularly, to a plunger pump power control device and a control method thereof.
  • the power control is to adjust and input oil at a pump outlet pressure into a variable piston by means of a power control device or to drain the pressure oil from the variable piston by means of the power control device so as to drive the servo piston to move and thereby achieve variation of the pump output. Meanwhile, the movement of the variable piston drives a feedback rod of the power control device to move in the opposite direction, and after the power control device stops the adjusting process, the variable process of the pump is completed.
  • FIG. 1 shows a power control device available on the market, which is under the intelligent property protection.
  • the power control device comprises a valve core and a valve sleeve that have the function of a 3-position two-way valve structure.
  • the connection between an inlet P and an outlet Ps or between the inlet P and an oil drain port T in the power control device is controlled by the movement of the valve core and the valve sleeve.
  • the other end of the valve core is provided with a spring loaded mechanism for reversely applying a pre-loading force.
  • the feedback rod is fixedly hinged on the valve body to rotate, with one end of the feedback rod being linked to the valve sleeve and the other end thereof being opened to be connected with the variable piston.
  • the feedback rod functions according to the lever principle so that the moving direction of the variable piston is opposite to that of the valve sleeve, thereby achieving mechanical feedback.
  • the 3-position two-way valve formed of the valve sleeve and the valve core of the aforesaid structures has two different diameters, higher requirements are imposed on the cylindricity of the valve sleeve and the valve core and the coaxiality of the two step diameters, which represents great difficulty in manufacturing and results in higher mass production cost. Moreover, because of the objective existence of coaxiality errors between the two step diameters of each of the valve sleeve and the valve core, sticking may be caused.
  • US 4483663 A discloses a speed droop compensating control for a variable displacement pump.
  • the control includes a control valve being able to adjust the position of a swash plate of the pump by connection of a control cylinder to either control pressure or drain.
  • EP 0821163 A1 discloses a swash plate controlling apparatus for a pump or motor.
  • US 4381702 A discloses a displacement control for a pump or motor having a swash plate.
  • An objective of the present disclosure is to provide a plunger pump power control device and a control method thereof, which has a simple structure, parts that are easy to be manufactured, a low mass production cost, a relatively small error and flexible variables, thereby overcoming the drawbacks of the prior art.
  • a plunger pump power control device which comprises a control valve body, a valve core, a valve sleeve, a stop screwed plug, a spring pre-loaded mechanism and a feedback mechanism; an oil inlet P, an oil outlet Ps and two oil drain ports T are provided on the control valve body; the oil outlet Ps is externally connected to a variable piston chamber of a pump body; the valve core is provided within the valve sleeve, and a first cavity (E-cavity) is formed between the valve sleeve and the valve core and is in constant communication with the oil inlet P; the stop screwed plug is provided at one end of the control valve body, and the spring pre-loaded mechanism is provided at the other end of the control valve body; the valve sleeve is provided between the stop screwed plug and the spring pre-loaded mechanism, and the valve sleeve and the valve core form a 3-position two-way structure
  • oil between the stop screwed plug and the valve sleeve, the valve core is drained via one of the oil drain ports T, and oil between the valve sleeve and the spring pre-loaded mechanism is drained via the other of the oil drain ports T.
  • the spring pre-loaded mechanism described in the aforesaid technical solution comprises a first spring seat, a large spring, a small spring, a second spring seat, a screw insert and a nut;
  • the screw insert is formed with a groove having a step thereon, the screw insert is screwed into the control valve body and is fixed at one end of the control valve body via the nut;
  • the first spring seat and the second spring seat are disposed in the groove opposite to each other, the small spring and the large spring are disposed between the first spring seat and the second spring seat, and the small spring is disposed inside the large spring.
  • the spring pre-loaded mechanism described in the aforesaid technical solution further has an adjusting screw, and one end of the adjusting screw is screwed into the screw insert and contacts with the second spring seat.
  • the present disclosure has the following benefits:
  • control valve body 1 valve core 2
  • valve sleeve 3 stop screwed plug 4
  • spring pre-loaded mechanism 5 first spring seat 51, large spring 52, small spring 53, second spring seat 54, screw insert 55, nut 56, adjusting screw 57, feedback mechanism 6, slide valve 7
  • a plunger pump power control device comprises a control valve body 1, a valve core 2, a valve sleeve 3, a stop screwed plug 4, a spring pre-loaded mechanism 5, a feedback mechanism 6, and a slide valve 7; an oil inlet P, an oil outlet Ps and two oil drain ports T are provided on the control valve body 1; the oil outlet Ps is externally connected to a variable piston chamber of a pump body; the valve core 2 is provided within the valve sleeve 3, the valve sleeve 3 and the valve core 2 form a 3-position two-way structure valve and an E-cavity is formed between the valve sleeve 3 and the valve core 2; the slide valve 7 is provided at the central part of one end of the valve core 2, a C-cavity is formed along a radial direction of the valve core 2 between the slide valve 7 and the valve core 2, and a ball end of the slide valve 7 contacts with the stop screwed plug 4; the stop screwed plug 4 is provided
  • the perpendicularity between the plane of the stop screwed plug 4 that is near the valve core 2 and an axis of the slide valve 7 is within 0.05 mm so as to prevent the slide valve 7 from being affected by a radial force.
  • the power control device comprises two oil drain ports T, one of the oil drain ports T is disposed between the stop screwed plug and the valve sleeve, and the other of the oil drain ports T is disposed between the valve sleeve and the spring pre-loaded mechanism.
  • the spring pre-loaded mechanism 5 is used to adjust the output power and comprises a first spring seat 51, a large spring 52, a small spring 53, a second spring seat 54, a screw insert 55 and a nut 56;
  • the screw insert 55 is formed with a groove having a step thereon, the screw insert 55 is screwed into the control valve body I and is fixed at one end of the control valve body 1 via the nut 56;
  • the first spring seat 51 and the second spring seat 54 are disposed in the groove opposite to each other, the small spring 53 and the large spring 52 are disposed between the first spring seat 51 and the second spring seat 54, and the small spring 53 is disposed inside the large spring 52.
  • the spring pre-loaded mechanism 5 further has an adjusting screw 57, and one end of the adjusting screw 57 is screwed into the screw insert 55 and contacts with the second spring seat 54.
  • the control method for a plunger pump power control device specifically comprises the following steps of:
  • the practical output power of the hydraulic plunger pump is represented by two broken lines instead of the theoretical curve, and the error thereof is within 3%.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
  • Control Of Positive-Displacement Pumps (AREA)

Claims (3)

  1. Kolbenpumpe-Leistungssteuervorrichtung, umfassend einen Steuerventilkörper (1), einen Ventileinsatz (2), eine Ventilhülse (3), einen Anschlageinschraubzapfen (4), einen federvorgespannten Mechanismus (5) und einen Rückmeldungsmechanismus (6), einen Öleinlass (P), einen Ölauslass (Ps) und zwei Ölabflussanschlüsse (T), die auf dem Steuerventilkörper (1) bereitgestellt sind, wobei der Ölauslass (Ps) mit einer variablen Kolbenkammer eines Pumpenkörpers extern verbunden ist, wobei der Ventileinsatz (2) innerhalb der Ventilhülse (3) bereitgestellt ist und ein erster Hohlraum (E-Hohlraum) zwischen der Ventilhülse (3) und dem Ventileinsatz (2) gebildet ist, wobei der Anschlageinschraubzapfen (4) an einem Ende des Steuerventilkörpers (1) bereitgestellt ist und der federvorgespannte Mechanismus (5) an dem anderen Ende des Steuerventilkörpers (1) bereitgestellt ist, wobei der Ventileinsatz (2) und die Ventilhülse (3) zwischen dem Anschlageinschraubzapfen (4) und dem federvorgespannten Mechanismus (5) bereitgestellt sind und die Ventilhülse (3) und der Ventileinsatz (2) ein 3-Position-Zwei-Wege-Strukturventil bilden, wobei der Rückmeldungsmechanismus (6) auf dem Steuerventilkörper (1) angelenkt ist, wobei ein Ende des Rückmeldungsmechanismus (6) mit der Ventilhülse (3) verbunden ist, um die Ventilhülse (3) anzutreiben, sich in eine axiale Richtung zu bewegen, und wobei das andere Ende mit einem variablen Kolben verbunden ist, dadurch gekennzeichnet, dass
    der erste Hohlraum (E-Hohlraum) mit dem Öleinlass (P) in konstanter Kommunikation ist, ein Schiebeventil (7) an dem mittigen Teil eines Endes des Ventileinsatzes (2) bereitgestellt ist, ein zweiter Hohlraum (C-Hohlraum) zwischen dem Schiebeventil (7) und dem Ventileinsatz (2) angeordnet ist und das Schiebeventil (7) eng an dem Anschlageinschraubzapfen (4) unter der Wirkung des Drucks des zweiten Hohlraums (E-Hohlraum) angebracht ist, ein Kugelende des Schiebeventils (7) den Anschlageinschraubzapfen (4) berührt und Öl zwischen dem Anschlageinschraubzapfen (4) und der Ventilhülse (3) über einen der Ölablassanschlüsse T abgelassen wird und Öl zwischen der Ventilhülse (3) und dem federvorgespannten Mechanismus (5) über den anderen der Ölablassanschlüsse T abgelassen wird.
  2. Kolbenpumpe-Leistungssteuervorrichtung nach Anspruch 1, wobei der federvorgespannte Mechanismus (5) einen ersten Federsitz (51), eine große Feder (52), eine kleine Feder (53), einen zweiten Federsitz (54), einen Schraubeinsatz (55) und eine Mutter (56) umfasst, wobei der Schraubeinsatz (55) mit einer Nut gebildet ist, die eine Stufe darauf hat, wobei der Schraubeinsatz (55) in den Steuerventilkörper (1) geschraubt und an einem Ende des Steuerventilkörpers (1) über die Mutter (56) befestigt ist, wobei der erste Federsitz (51) und der zweite Federsitz (54) in der Nut einander gegenüberliegend angeordnet sind, wobei die kleine Feder (53) und die große Feder (52) zwischen dem ersten Federsitz (51) und dem zweiten Federsitz (54) angeordnet sind und die kleine Feder (53) im Inneren der großen Feder (52) angeordnet ist.
  3. Kolbenpumpe-Leistungssteuervorrichtung nach Anspruch 2, wobei der federvorgespannte Mechanismus (5) ferner eine Einstellschraube (57) hat und ein Ende der Einstellschraube (57) in den Schraubeinsatz (55) geschraubt ist und den zweiten Federsitz (54) berührt.
EP13897807.7A 2013-11-20 2013-12-02 Leistungsregelungsvorrichtung für eine kolbenpumpe und steuerungsverfahren dafür Active EP2944818B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CN201310590024.2A CN104234992B (zh) 2013-11-20 2013-11-20 一种柱塞泵功率控制装置及其控制方法
CN201320740091.3U CN203627179U (zh) 2013-11-20 2013-11-20 一种柱塞泵功率控制装置
PCT/CN2013/001488 WO2015074167A1 (zh) 2013-11-20 2013-12-02 一种柱塞泵功率控制装置及其控制方法

Publications (3)

Publication Number Publication Date
EP2944818A1 EP2944818A1 (de) 2015-11-18
EP2944818A4 EP2944818A4 (de) 2016-12-28
EP2944818B1 true EP2944818B1 (de) 2018-12-26

Family

ID=53178768

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13897807.7A Active EP2944818B1 (de) 2013-11-20 2013-12-02 Leistungsregelungsvorrichtung für eine kolbenpumpe und steuerungsverfahren dafür

Country Status (4)

Country Link
US (1) US20150345491A1 (de)
EP (1) EP2944818B1 (de)
JP (1) JP6105759B2 (de)
WO (1) WO2015074167A1 (de)

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CN107051819A (zh) * 2017-05-09 2017-08-18 深圳市万禾自动化设备有限公司 多头同步定量点胶装置
CN107781126B (zh) * 2017-11-22 2023-12-05 江苏恒立液压科技有限公司 液压泵控制阀
CN108050029A (zh) * 2017-12-05 2018-05-18 宁波市奉化溪口威尔特制泵厂 一种节能高效斜盘式高压柱塞泵
CN107940057B (zh) * 2017-12-13 2024-05-24 宁波勋辉电器有限公司 一种高压清洗机柱塞泵调压阀
CN108302078A (zh) * 2018-03-19 2018-07-20 安徽博流体传动股份有限公司 远程压力控制阀
CN110985212B (zh) * 2019-11-04 2022-04-22 南京航空航天大学 一种泵控缸间接液力驱动式燃油开关阀及其控制方法
CN110816504B (zh) * 2019-11-05 2024-06-11 南京经纬达汽车科技有限公司 一种柱塞泵式分布式自主制动系统
CN114687979A (zh) * 2022-03-21 2022-07-01 江苏汇智高端工程机械创新中心有限公司 柱塞泵流量及功率控制系统
CN114837912B (zh) * 2022-05-17 2023-09-22 众和科泰(北京)科技有限公司 一种恒排量轮压油泵及包含该油泵的自动化设备

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Also Published As

Publication number Publication date
US20150345491A1 (en) 2015-12-03
JP2016513771A (ja) 2016-05-16
EP2944818A1 (de) 2015-11-18
WO2015074167A1 (zh) 2015-05-28
EP2944818A4 (de) 2016-12-28
JP6105759B2 (ja) 2017-03-29

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