KR20210033768A - Hydraulic servo cylinder unit without servo valve - Google Patents

Hydraulic servo cylinder unit without servo valve Download PDF

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Publication number
KR20210033768A
KR20210033768A KR1020190115471A KR20190115471A KR20210033768A KR 20210033768 A KR20210033768 A KR 20210033768A KR 1020190115471 A KR1020190115471 A KR 1020190115471A KR 20190115471 A KR20190115471 A KR 20190115471A KR 20210033768 A KR20210033768 A KR 20210033768A
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South Korea
Prior art keywords
fluid
roller
hydraulic
rotor
rotate
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KR1020190115471A
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Korean (ko)
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박소현
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박소현
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Priority to KR1020190115471A priority Critical patent/KR20210033768A/en
Publication of KR20210033768A publication Critical patent/KR20210033768A/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
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/02—Systems essentially incorporating special features for controlling the speed or actuating force of an output member
    • F15B11/028—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the actuating force
    • 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
    • F04B43/00—Machines, pumps, or pumping installations having flexible working members
    • F04B43/12—Machines, pumps, or pumping installations having flexible working members having peristaltic action
    • F04B43/1253—Machines, pumps, or pumping installations having flexible working members having peristaltic action by using two or more rollers as squeezing elements, the rollers moving on an arc of a circle during squeezing
    • 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
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/02—Systems essentially incorporating special features for controlling the speed or actuating force of an output member
    • F15B11/04—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed
    • 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
    • F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
    • F15B21/008—Reduction of noise or vibration
    • 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
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/205—Systems with pumps
    • F15B2211/2053—Type of pump
    • F15B2211/20569—Type of pump capable of working as pump and motor

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Hydraulic Motors (AREA)

Abstract

The present invention relates to a hydraulic system, which enables a hydraulic cylinder to be moved forward and backward or be rotated through a flow of fluid, and to control of a fluid pump and a fluid motor generating driving force with high efficiency and low noise capable of servo control without a servo valve. More specifically, the present invention is rotated by a needle roller type rotor or has the low noise by using flow force of the fluid. Moreover, the present invention is operated at high driving efficiency.

Description

밸브가 없는 유압서보 실린더 장치{Hydraulic servo cylinder unit without servo valve}Hydraulic servo cylinder unit without servo valve

본 발명은 유압서보실린더와 유압서보장치에 관한 것으로, 특히 유압서보장치제어 시스템으로 서보밸브를 거치지 않고 유압펌프의 회전에 의해 발생 되는 압력을 서보모터와 모터제어기를 이용하여 유체의 방향전환 속도, 압력을 사용자의 필요에 따라 자유롭게 조절할 수있는 펌프와 모터에 관한 것이다.The present invention relates to a hydraulic servo cylinder and a hydraulic servo device, and in particular, a pressure generated by rotation of a hydraulic pump without passing through a servo valve as a hydraulic servo device control system, using a servo motor and a motor controller to change the direction of fluid, It relates to a pump and motor that can freely adjust the pressure according to the needs of the user.

통상적이고 기본적인 유압서보 실린더는 유압식 서보밸브에 의한 유량제어에 의하여 사용자의 필요에 따른 실린더의 속도, 압력, 방향을 전환하거나 조정할 수 있으나 유압탱크에서 발생하는 유체가 밸브를 통과하는 동안에 함유된 이물질 등에 의하여 밸브의 동작을 방해하지 않도록 철저한 관리와 미세한 필터를 통한 유체의 청정도 관리가 필요하다. Conventional and basic hydraulic servo cylinders can change or adjust the speed, pressure, and direction of the cylinder according to the user's needs by controlling the flow rate by a hydraulic servo valve. Therefore, thorough management and cleanliness of fluid through fine filters are required so as not to interfere with the operation of the valve.

또한, 밸브의 정밀도에 의하여 실린더의 제어상태가 변할 수 있는 문제를 가지고 있으며, 온도의 변화에 따라서 실린더의 제어상태가 변하는 어려움을 가지고 있다.In addition, there is a problem in that the control state of the cylinder may change due to the precision of the valve, and there is a difficulty in that the control state of the cylinder changes according to the change of temperature.

이러한 문제는 밸브를 통과하는 유체의 양으로 결정되는 제어특성에 기인한다. This problem is due to the control characteristics determined by the amount of fluid passing through the valve.

서보밸브의 이러한 특성을 서보밸브를 거치지 않고 유압모터의 회전을 제어하여 사용자가 필요로 하는 실린더의 제어를 달성하도록 하기 위하여 양방향 유압펌프를 채용하고 유압펌프를 구동시키는 모터를 펄스제어가 가능한 서보모터 또는 스텝핑 모터를 사용하며 모션콘트롤러를 사용하여 폐회로상태에서 상호제어를 할 수 있도록 하는 것을 특징으로 하는 유압실린더 제어장치로 모든 다른 유체이송 장치와 구별 위치 결정 수단이 형성된다.In order to control the rotation of the hydraulic motor without passing through the servo valve to achieve the control of the cylinder required by the user, a servo motor capable of pulse-controlling the motor that drives the hydraulic pump adopts a two-way hydraulic pump. Alternatively, it is a hydraulic cylinder control device that uses a stepping motor and enables mutual control in a closed-circuit state by using a motion controller, and a positioning means distinct from all other fluid transfer devices is formed.

상기와 같은 해결책은 매력적이지만 기존의 서보밸브를 대신하는 펄스제어장치가 추가되며 이로 인하여 본 발명은 이송이 필요한 시간에만 운전하며 이동이 정지되는 동안에는 모터가 정지할 수 있으므로 종래의 유압펌프에 비교하여 동력의 손실을 최소화하며 저소음, 저진동, 저마찰로 작동하는 펌프와 모터가 절실히 요구되는 실정이다.Although the above solution is attractive, a pulse control device that replaces the existing servo valve is added. As a result, the present invention operates only when the transfer is required, and the motor can be stopped while the movement is stopped, compared to a conventional hydraulic pump. There is an urgent need for a pump and motor that minimizes power loss and operates with low noise, low vibration, and low friction.

이에 본 발명은 상기와 같은 종래 기술의 문제점을 감안하여 안출한 것으로 저소음이며 높은 구동효율로 작동하는 유압실린더를 제공하는데 목적이 있다.Accordingly, the present invention has been devised in view of the problems of the prior art as described above, and an object of the present invention is to provide a hydraulic cylinder that operates with low noise and high driving efficiency.

그리고 본 발명의 다른 목적은 센서에 의하여 피드백된 데이터를 기초로 다양한 속도와 압력, 위치 정도, 동작의 변환에 사용할 수 있도록 하는 데 있다.Another object of the present invention is to enable it to be used for conversion of various speeds, pressures, positions, and motions based on data fed back by a sensor.

상기한 목적을 달성하기 위하여 본 발명은 상위제어장치, 모션콘트롤러, 압력센서, 변위센서, 양방향유압펌프, 서보모터와 모터제어기, 유압탱크, 릴리프밸브에 의하여 구동되는 시스템이다. In order to achieve the above object, the present invention is a system driven by an upper control device, a motion controller, a pressure sensor, a displacement sensor, a two-way hydraulic pump, a servo motor and a motor controller, a hydraulic tank, and a relief valve.

이상에서와 같이 본 발명은 유체의 유동력을 이용하여 저소음이며 높은 구동효율로 작동하는 유압실린더로 서보밸브 없이 유압실린더의 위치, 압력, 속도제어에 효과가 있다.As described above, the present invention is effective in controlling the position, pressure, and speed of the hydraulic cylinder without a servo valve as a hydraulic cylinder that operates with low noise and high driving efficiency by using the fluid flow force.

도 1a는 본 발명에 따른 제저장치의 구성을 표시한 작동 구성도,
도 1b는 도 1a에서 롤러와 회전자를 구동하는 치차의 배치도,
도 2는 롤러 3개와 회전자 2개가 조합되어 1:1로 회전하는 단면 상세도,
도 3은 도 2의 펌프가 대용량, 소용량이 조합된 더블형 펌프의 단면도,
도 4는 3개의 회전자와 4개의 롤러가 조합된 실시예,
도 5는 도 4의 유체이동상태의 상세도,
도 6은 도 2의 저속형으로 롤러 3개, 회전자 2개로 1:3 비율로 회전하는 실시예1A is an operation configuration diagram showing the configuration of a control device according to the present invention,
1B is a layout view of a gear driving a roller and a rotor in FIG. 1A;
2 is a detailed cross-sectional view in which three rollers and two rotors are combined to rotate 1:1,
3 is a cross-sectional view of a double-type pump in which the pump of FIG. 2 is a combination of a large capacity and a small capacity;
Figure 4 is an embodiment in which three rotors and four rollers are combined,
5 is a detailed view of the fluid movement state of FIG. 4;
6 is an embodiment of rotating at a ratio of 1:3 with 3 rollers and 2 rotors in the low-speed type of FIG. 2

이에 상기한 바와 같은 본 발명의 바람직한 실시예를 첨부도면에 의거하여 상세히 설명하면 다음과 같다.Hereinafter, a preferred embodiment of the present invention as described above will be described in detail with reference to the accompanying drawings.

도 1a, 도 1b, 도 2 에 도시된 바와 같이 본 발명의 유체펌프는 유체를 이용하여 구동되거나 구동력을 발생시키도록 구성하는 것으로 롤러(10)와 회전자(08)의 비율에 따라 구분할 수 있으며 작동과 구조는 유사하며 본 발명에서는 롤러(10)와 회전자(08)가 1:1 비율로 구성된 치차(02,03)가 적용된 펌프와 더블형태로 구성된 도3의 형태로 구성된다.1A, 1B, and 2, the fluid pump of the present invention is driven by using a fluid or is configured to generate a driving force, and can be classified according to the ratio of the roller 10 and the rotor 08. The operation and structure are similar, and in the present invention, the roller 10 and the rotor 08 are configured in the form of Fig. 3 in the form of a pump to which teeth (02, 03) are applied in a 1:1 ratio and a double shape.

이러한 상기 치차(02,03)는 각각 유체가 유입 유동하는 유입 유동공간(71,73) 및 유체가 배출 유동하는 공간(72,74)으로 구성한다.These teeth (02, 03) are composed of inlet flow spaces 71 and 73 through which the fluid flows in and the spaces 72 and 74 through which the fluid discharges and flows.

이때, 상기 롤러(10)와 회전자(08)는 치차(02,03)와 연결되어 동시에 구동하며 롤러(10)에는 3개 또는 4개의 니들(12)이 장착되어 자유 회전하면서 하우징(04)의 내면에 긴밀하게 접촉된 상태로 유로통로(71,72)를 따라 회전하면서 유체를 이동시키며 배출홀(75,75-1,75-2)를 통해 배출하게 된다.At this time, the roller 10 and the rotor 08 are connected to the teeth (02, 03) and driven at the same time, and the roller 10 is equipped with three or four needles 12 to freely rotate while the housing (04) The fluid is moved while rotating along the flow paths 71 and 72 in close contact with the inner surface of the cylinder and discharged through the discharge holes 75,75-1,75-2.

이상에서는 본 발명을 특정의 바람직한 실시예를 들어 도시하고 설명하였으나 본 발명은 상기한 실시예에 한정되지 아니하며 본 발명의 정신을 벗어나지 않는 범위 내에서 당해 발명이 속하는 기술분야에서 통상의 지식을 가진자에 의해 다양한 변경과 수정이 가능할 것이다.In the above, the present invention has been illustrated and described with reference to specific preferred embodiments, but the present invention is not limited to the above-described embodiments, and those of ordinary skill in the art to which the present invention pertains within the scope of the spirit of the present invention Various changes and modifications will be possible.

02 : 치차 (주구동용)
03 : 치차 (종동용)
04 : 하우징
08 : 회전자
10 : 롤러
12 : 니들
71 : 유체(흡입구)
72 : 유체(토출구)
73 : 유체(흡입구)
74 : 유체(토출구)
75 : 배출체크밸브
76 : 공급체크밸브02: Gear (for main drive)
03: Gear (for follower)
04: housing
08: rotor
10: roller
12: needle
71: fluid (intake)
72: fluid (discharge port)
73: fluid (intake port)
74: fluid (discharge port)
75: discharge check valve
76: supply check valve

Claims (5)

유체펌프에 있어서,
롤러(10)와 회전자(08)는 치차(02,03)와 연결되어 동시에 구동하며 롤러(10)에는 3개 또는 4개의 니들(12)이 장착되어 자유 회전하면서 하우징(04)의 내면에 긴밀하게 접촉된 상태로 유로통로(71,72)를 따라 회전하면서 유체를 이동시키며 배출홀(75,75-1,75-2)를 통해 배출되는 유체를 유압실린더에 연결하여 유압실린더가 사용자가 원하는 속도, 압력, 거리를 이동 또는 회전하도록 하는 것을 특징으로 하는 유압서보실린더장치.In the fluid pump,
The roller 10 and the rotor 08 are connected to the teeth (02, 03) and drive at the same time, and the roller 10 is equipped with three or four needles 12 to freely rotate on the inner surface of the housing 04. The fluid is moved while rotating along the flow paths (71, 72) in close contact, and the fluid discharged through the discharge holes (75,75-1,75-2) is connected to the hydraulic cylinder, so that the hydraulic cylinder is operated by the user. Hydraulic servo cylinder device, characterized in that to move or rotate a desired speed, pressure, and distance. 제 1항에 있어서,
상기 하우징(04)과 롤러(10), 회전자(08), 니들(12)은 구름접촉으로 하며 회전하고, 회전축(11)은 회전하여 유체를 배출하는 유체 펌프기능으로 좌우 회전변경으로 흡입, 배출방향이 바뀌는 것을 특징으로 하는 펌프가 부착된 유압 서보실린더로서 서보모터에 의하여 유압, 유량이 제어되는 것을 특징으로 하는 유압서보장치.The method of claim 1,
The housing (04), the roller (10), the rotor (08), and the needle (12) rotate in rolling contact and rotate, and the rotating shaft (11) rotates to discharge fluid, and is sucked by changing the left and right rotation by a fluid pump function, As a hydraulic servo cylinder with a pump, characterized in that the discharge direction is changed, the hydraulic pressure and flow rate are controlled by a servo motor. 제 1항에 있어서,
롤러(10)와 회전자(08)가 1:1 비율로 구성된 치차(02,03)에 의하여 회전하며 대용량, 소용량의 롤러와 회전자가 더블형태로 치차 좌우에 구성된 도 3의 형태의 다층형 배열을 특징으로 하는 유체펌프부착형 서보실린더장치.The method of claim 1,
The roller 10 and the rotor 08 are rotated by the gears (02, 03) composed of a 1:1 ratio, and the large-capacity, small-capacity roller and the rotor are double-shaped, and a multi-layered arrangement in the form of FIG. 3 on the left and right sides of the gear. A servo cylinder device with a fluid pump, characterized in that. 제 1항에 있어서,
롤러(10)와 회전자(08)가 원형의 구름마찰을 하여 소음과 진동을 줄일 수 있는 구조를 특징으로 하는 유체펌프가 부착된 유압서보실린더장치.The method of claim 1,
A hydraulic servo cylinder device equipped with a fluid pump, characterized in that the roller 10 and the rotor 08 have circular rolling friction to reduce noise and vibration. 제 1항에 있어서,
롤러(10)와 회전자(08)가 3:1 비율로 구성된 치차(02,03)에 의하여 회전하며 도 3의 형태의 소형이며 간단한 구조를 특징으로 하는 유체펌프가 부착된 유압서보실린더장치.











The method of claim 1,
The roller 10 and the rotor 08 rotate by the gears 02 and 03 configured in a 3:1 ratio, and a hydraulic servo cylinder device equipped with a fluid pump characterized by a compact and simple structure in the form of FIG. 3.
KR1020190115471A 2019-09-19 2019-09-19 Hydraulic servo cylinder unit without servo valve KR20210033768A (en)

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