KR950007891Y1 - A oil-pressure control circuit of excavator - Google Patents
A oil-pressure control circuit of excavator Download PDFInfo
- Publication number
- KR950007891Y1 KR950007891Y1 KR2019910025835U KR910025835U KR950007891Y1 KR 950007891 Y1 KR950007891 Y1 KR 950007891Y1 KR 2019910025835 U KR2019910025835 U KR 2019910025835U KR 910025835 U KR910025835 U KR 910025835U KR 950007891 Y1 KR950007891 Y1 KR 950007891Y1
- Authority
- KR
- South Korea
- Prior art keywords
- pressure reducing
- emergency
- proportional pressure
- valve
- pump
- Prior art date
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
- E02F9/226—Safety arrangements, e.g. hydraulic driven fans, preventing cavitation, leakage, overheating
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
- E02F9/2264—Arrangements or adaptations of elements for hydraulic drives
- E02F9/2267—Valves or distributors
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
- E02F9/2278—Hydraulic circuits
- E02F9/2292—Systems with two or more pumps
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
내용 없음.No content.
Description
제1도는 통상의 건설중장비에 사용되는 네가티브 방식 펌프마력 제어의 유압회로도.1 is a hydraulic circuit diagram of negative pump horsepower control used in conventional heavy equipment.
제2도는 제1도와 관련된 포지티브방식의 유압회로도.2 is a positive hydraulic circuit diagram related to FIG.
제3도는 본 고안에 의한 펌프마력제어의 네가티브방식 전자제어 비상유압 회로도.3 is a negative electronically controlled emergency hydraulic circuit diagram of pump horsepower control according to the present invention.
제4도는 제3도와 관련된 포지티브방식의 전자제어 비상유압 회로도.4 is a positive electronically controlled emergency hydraulic circuit diagram related to FIG.
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
1 : 비상비례감압부 11 : 수동밸브1: Emergency proportional pressure reducing unit 11: Manual valve
12 : 비례감압밸브 13 : 체크밸브12: proportional pressure reducing valve 13: check valve
본 고안은 건설중장비의 펌프마력 제어수단과 관련된 것으로서, 이는 특히 이러한 펌프의 마력제어를 유압전자식밸브로 제어할때 시스템 전기의 전력중단이나 또는 전자식감압 밸브동작의 오동작시에 응급으로 작동 할수 있도록한 전자제어 비상유압회로에 관한 것이다.The present invention is related to the pump horsepower control means of the heavy equipment, which makes it possible to operate in emergency in the event of power interruption of the system electricity or malfunction of the electronic pressure reducing valve operation, especially when the horsepower control of the pump is controlled by the hydraulic solenoid valve An electronically controlled emergency hydraulic circuit.
건설중장비에서 펌프의 마력제어를 전자식 유압밸브로 제어를 행하는 기술적 수단이 범용화되어 있다.Technical means for controlling the horsepower control of the pump in the construction equipment by the electronic hydraulic valve is widely used.
일예로, 이러한 펌프의 마력제어 수단중 그 네가티브 방식의 제어회로를 제1도와 같이 나타내었다.As an example, the negative control circuit of the horsepower control means of such a pump is shown in FIG.
여기서는 메인펌프(21)의 유량을 최소 및 최대값으로 구동시키는 서보피스톤(22)과, 이 서보피스톤(22)을 제어하는 마력 제어스프링(23) 및 이 마력제어스프링(23)을 유압으로 제어하는 전자비례 감압밸브(24)와, 보조펌프(25) 및 레귤레이터(26)등이 포함된 구성으로 되어 있다.Here, the servo piston 22 for driving the flow rate of the main pump 21 to minimum and maximum values, the horsepower control spring 23 for controlling the servo piston 22, and the horsepower control spring 23 are hydraulically controlled. The electromagnetic proportional pressure reducing valve 24, the auxiliary pump 25, the regulator 26, and the like are included.
또, 여기서는 전자비례감압밸브(24)로부터 출력된 유압 Pi=0가 될때는 메인펌프(21)는 최대마력 구동이 진행 되는 것이고, 이 Pi의 유압정도에 따라 서보피스톤 (22)이 동작범위가 억제되어 펌프마력을 제어 하게 되는 것이다.In this case, when the hydraulic pressure Pi output from the electromagnetic proportional pressure reducing valve 24 is reached, the main pump 21 is driven by the maximum horsepower, and the servo piston 22 has an operating range depending on the hydraulic pressure of the Pi. It is suppressed to control pump horsepower.
또, 제2도와 같이 포지티브방식에서는 전자비례 감압밸브(24)의 출력 유압이 Pi=0가 될때 메인펌프(21)는 최소마력을 구동될 수 있도록 설계된 것에서 제1도와의 차이가 있다.In addition, in the positive method as shown in FIG. 2, the main pump 21 is designed to drive the minimum horsepower when the output hydraulic pressure of the electromagnetic proportional pressure reducing valve 24 becomes Pi = 0.
그러나, 종래의 이러한 기술에서는 상기 전자비례 감압밸브(24)에 이상이 생기거나 또는 여기에 공급되는 전력이 차단되는 등의 이상사태에서는 상기 메인펌프의 출력이 갑자기 최소나 또는 최대가 유지되므로서 기기의 정상작업을 행할 수 없을뿐만 아니라 그 고장원인 및 진단을 정확히 알 수 없어 작업의 곤란을 초래하는 등의 불리한 문제점을 야기하였다.However, in the related art, the output of the main pump suddenly keeps its minimum or maximum in an abnormal situation such as an abnormality in the electromagnetic proportional pressure reducing valve 24 or the power supplied thereto is interrupted. Not only could not perform the normal operation of the operation, but also caused the disadvantages such as the cause of the trouble due to the failure cause and the exact diagnosis is not known.
특히, 상기와 같은 메인펌프를 갖는 중장비가 특수한 작업을 수행하고 있을때에는 (일예로, 저수지 및 댐에서의 응급 공사등)장비의 고장으로 인한 막대한 재난을 초래할 우려도 있어 바람직한 것이 못되었다.In particular, when heavy equipment having such a main pump is performing a special operation (for example, emergency construction in reservoirs and dams), there is a fear that it may cause a huge disaster due to the failure of the equipment was not preferable.
본 고안의 목적은 상기와 같은 종래기술의 문제점을 개선할 수 있도록 한 것이다.An object of the present invention is to improve the problems of the prior art as described above.
본 고안은 특히, 상기예의 목적을 실현할 수 있도록 기존의 전자비례감압밸브와 병렬로 비상시 수동제어에 의한 비상 전자비례감압부를 설치시킨 구성의 전자제어비상유압회로를 특징으로 하는 것이다.In particular, the present invention is characterized by an electronically controlled emergency hydraulic circuit configured to provide an emergency electromagnetic proportional pressure reducing unit by manual control in an emergency in parallel with a conventional electromagnetic proportional pressure reducing valve so as to realize the object of the above example.
이하에서 이를 좀더 상세히 설명하면 다음과 같다.This will be described in more detail below.
즉, 제3도는 본 고안에 의한 전자제어 비상 유압회로가 구비된 시스템의 유압회로를 나타내었다.That is, FIG. 3 shows the hydraulic circuit of the system equipped with the electronically controlled emergency hydraulic circuit according to the present invention.
여기서는 네가티브방식의 펌프마력제어의 유압회로에서 전자비례감압밸브(24)와 병렬로 비상비례 감압부(1)가 구비된 구성이다.Here, in the hydraulic circuit of the negative pump horsepower control circuit, the emergency proportional pressure reducing part 1 is provided in parallel with the electromagnetic proportional pressure reducing valve 24.
또, 제4도와 같은 포지티브방식에서도 전자비례감압밸브(24)와 병렬로 비상비례 감압부(1)가 설치된 구성이다.Moreover, also in the positive system like FIG. 4, the emergency proportional pressure reduction part 1 is provided in parallel with the electromagnetic proportional pressure reducing valve 24. As shown in FIG.
또, 상기 비상비례 감압부(1)는 통상의 시스템 정상동작시 비상비례 감압부(1)로 역류되는 유압을 방지하기 위한 체크밸브(13)와, 이 체크밸브(13)와 보조펌프(25)와의 사이에서 비례감압밸브(12)와, 이 비례감압밸브(12)에 가해지는 유압 출력을 수조작으로 조절할 수 있도록 한 수동밸브(11)를 포함한 구성으로 되어 있다.In addition, the emergency proportional pressure reducing unit 1 includes a check valve 13 for preventing hydraulic pressure flowing back to the emergency proportional pressure reducing unit 1 during normal operation of the system, and the check valve 13 and the auxiliary pump 25. The proportional pressure reducing valve 12 and the manual valve 11 by which the hydraulic power applied to this proportional pressure reducing valve 12 are adjusted manually are comprised.
이러한 구성의 본 고안은 그 작용 및 효과가 다음과 같다.The present invention of such a configuration is as follows.
즉, 본 고안에 의한 비상비례 감압부(1)는 시스템이 정상가동되어질 때는 체크밸브(13)에 의해 비상비례 감압부(1)로 유압되는 역류 유압을 억제 하므로 정상동작을 진행할 수 있다.That is, the emergency proportional pressure reducing unit 1 according to the present invention suppresses the reverse flow hydraulic pressure hydraulically supplied to the emergency proportional pressure reducing unit 1 by the check valve 13 when the system is normally operated.
그런, 시스템이 전자비례밸브(24)에서 고장이 나거나 시스템콘트롤러로부터의 제어 출력이 제공되지 않은 비상상황하에서는 상기 비상비례 감압부(1)의 수동 밸브(11)로 적절한 보조펌프(25)측의 출력을 조절하여 비례감압밸브(12)를 통해 시스템에 제공하므로서 비상시에 대처한 시스템가동을 정상적으로 행할 수 있는 것이다.In such an emergency situation in which the system fails in the electromagnetic proportional valve 24 or the control output from the system controller is not provided, an appropriate auxiliary pump 25 side of the emergency proportional pressure reducing part 1 is used as a manual valve 11. By adjusting the output and providing the system through the proportional pressure reducing valve 12, it is possible to perform normal system operation in response to an emergency.
한편, 상기와 같은 네가티브시스템에서 메인펌프(21)측의 정상상태하의 출력조건은 본 고안과 비교하여(표 1)과 같이 나타내었다.On the other hand, in the negative system as described above, the output condition under the steady state of the main pump 21 side is shown as compared with the present invention (Table 1).
[표 1]TABLE 1
여기에서와 같이 시스템에서 전자비례감압밸브(24)측의 이상이 있을때에는 비상 비례감압부(1)에서 적정한 출력으로 조절세팅 하므로 최적 출력으로의 시스템을 제어할 수 있는 것이다.When there is an abnormality on the electromagnetic proportional pressure reducing valve 24 side in the system as described here, the emergency proportional pressure reducing unit 1 adjusts to an appropriate output, thereby controlling the system to an optimum output.
또, 상기 제4도와 같은 포지티브 시스템에서는 본 고안과 관련하여 그 출력조건을 (표 2)와 같이 나타내었다.In addition, in the positive system as shown in FIG. 4, the output conditions are shown in Table 2 in relation to the present invention.
[표 2]TABLE 2
여기서도 역시 시스템에서 전자비례감압밸브(24)등의 이상이 있을시 비상비례감압부(1)로 적정출력을 유지시킬 수 있는 것이다.Here too, when there is an abnormality such as an electronic proportional pressure reducing valve 24 in the system, it is possible to maintain a proper output to the emergency proportional pressure reducing part 1.
이러한 본 고안은 산업용 중장비의 펌프마력제어수단에서 전자식비례감압밸브나 시스템 콘트롤러의 이상발생시 시스템을 정상구동하는 비상수단이 구비되어져 있어 이러한 기기의 동작상의 신뢰성과 안정성을 양호히 확보할 수 있는 유익한 특징이 있는 것이다.The present invention is equipped with an emergency means for driving the system normally in the event of an abnormality of the electronic proportional pressure reducing valve or system controller in the pump horsepower control means of industrial heavy equipment, which is advantageous to ensure the reliability and stability of operation of such equipment. It is.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019910025835U KR950007891Y1 (en) | 1991-12-31 | 1991-12-31 | A oil-pressure control circuit of excavator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019910025835U KR950007891Y1 (en) | 1991-12-31 | 1991-12-31 | A oil-pressure control circuit of excavator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR930014472U KR930014472U (en) | 1993-07-27 |
| KR950007891Y1 true KR950007891Y1 (en) | 1995-09-25 |
Family
ID=19327309
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR2019910025835U KR950007891Y1 (en) | 1991-12-31 | 1991-12-31 | A oil-pressure control circuit of excavator |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR950007891Y1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016114556A1 (en) * | 2015-01-14 | 2016-07-21 | 두산인프라코어 주식회사 | Control system for construction machine |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100826276B1 (en) * | 2008-02-15 | 2008-04-29 | 이텍산업 주식회사 | Emergency power supply mechanism of snowplow |
-
1991
- 1991-12-31 KR KR2019910025835U patent/KR950007891Y1/en not_active IP Right Cessation
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016114556A1 (en) * | 2015-01-14 | 2016-07-21 | 두산인프라코어 주식회사 | Control system for construction machine |
| US10577777B2 (en) | 2015-01-14 | 2020-03-03 | Doosan Infracore Co., Ltd. | Control system for construction machinery |
Also Published As
| Publication number | Publication date |
|---|---|
| KR930014472U (en) | 1993-07-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6837045B2 (en) | Electrohydraulic lifting control device for industrial trucks | |
| EP1477686B1 (en) | Hydraulic controller for working machine | |
| EP0468944A1 (en) | An arrangement for controlling hydraulic motors | |
| US20110271669A1 (en) | Hybrid construction machine | |
| KR960023845A (en) | Hydraulic circuit using anti-tol valve of forklift | |
| US3620129A (en) | Hydraulic power circuit with emergency lowering provisions | |
| KR950007891Y1 (en) | A oil-pressure control circuit of excavator | |
| EP0111208A1 (en) | Power transmission | |
| JPS60215103A (en) | Hydraulic circuit | |
| KR900001935A (en) | Hydraulic Speed Mechanism for Swivel Speed Control of Backhoe | |
| JPS588804A (en) | Electric-hydraulic operating device for remote control particularly for changeover valve | |
| JPS58118303A (en) | Regenerative circuit in fluid pressure circuit | |
| KR20100075300A (en) | Hydraulic pump control apparatus for construction machinery | |
| EP0704623B1 (en) | Delivery control device for hydraulic pumps | |
| US4989495A (en) | Hydraulic positioning system with normal and high supply and exhaust flow paths | |
| US5097745A (en) | Speed control valve for a hydraulic motor speed controlled by pressure between throttle and motor | |
| WO1981000742A1 (en) | Controlled pressure upstaging and flow reduction | |
| JP4127282B2 (en) | Control device for variable displacement hydraulic motor | |
| JP2927308B2 (en) | Hydraulic control circuit | |
| US20030089176A1 (en) | Pressure switch | |
| JPH0529200Y2 (en) | ||
| JPH07180190A (en) | Hydraulic circuit preventing back pressure | |
| JPS61211504A (en) | Hydraulic circuit for service machine | |
| JPS587843B2 (en) | Yuatsu Seigiyo Cairo | |
| SU1344724A1 (en) | Hydraulic drive of jib crane fan |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A201 | Request for examination | ||
| E701 | Decision to grant or registration of patent right | ||
| REGI | Registration of establishment | ||
| FPAY | Annual fee payment |
Payment date: 19970828 Year of fee payment: 6 |
|
| LAPS | Lapse due to unpaid annual fee |