KR950006161A

KR950006161A - Heavy-duty hydraulics for straight travel

Info

Publication number: KR950006161A
Application number: KR1019930016815A
Authority: KR
Inventors: 정해균
Original assignee: 김연수; 삼성중공업 주식회사
Priority date: 1993-08-27
Filing date: 1993-08-27
Publication date: 1995-03-20

Abstract

본 발명은 직진주행이 가능한 중장비용 유압장치에 관한 것으로서, 더욱 상세하게는 용량이 동일한 각 메인펌프로부터 토출되는 유량으로서 회전되는 각 주행모터에 의해 구동되는 장비를 주행하는 도중에 작업장치를 동시에 조작해야 되는 경우 일측 메인펌프로부터 토출되는 유량을 작업장치측의 주행모터에 합류시킴으로서 장비의 직진주행이 가능하도록 한 것에 관한 것으로, 엔진(1)에 메인펌프(2)(3) 및 파일롯트 펌프(4)가 연결되고, 메인펌프(2)(3)의 공급측유로(24)(25)와 연통된 센터바이패스통로(5)(6)에 주행모터(9)(10) 조작용 밸브(11)(16)와, 스윙모터(7) 조작용 밸브(8) 및 수개의 작업장치(12)(14) 조절용 밸브(13)(15)가 병렬연결되고, 상기 공급측 유료(24)(25)에 분기된 페럴라인(30)(32)이 상기 각각의 밸브(13)(15)공급측 포트에 연결되며, 상기 파일롯트펌프(4)의 공급측 유로(20)에 연결된 파일롯트밸브(21)(22)는 주행모터(9)(10)조작용 밸브(11)(16)에 파일롯트라인(28)(28')(39)(39')으로 연결된 중장비용 유압장치에 있어서, 상기 스윙모터(7) 및 작업장치(12) 조작용 밸브(8)(13)에 이와 연동되도록 셀렉터밸브(34)(35)를 설치하고 상기 각 셀렉터밸브(34)(35)와 연통되는 주행직전 파일롯트라인(40)을 파일롯트펌프(4)의 공급측 유로(20)에 분기접속하며, 상기 파일롯트라인(40)일단부에 메인펌프(2)(3)의 유로를 합류시키는 직진 주행밸브(41)(42)를 연결시킨 것이다.The present invention relates to a hydraulic device for heavy equipment capable of traveling straight, and more particularly, the work device must be operated simultaneously while driving the equipment driven by the traveling motor rotated as a flow rate discharged from each main pump having the same capacity. In this case, the flow rate discharged from one main pump is combined with the traveling motor on the work device side to enable the straight running of the equipment. The main pump (2) and the pilot pump (4) in the engine ) Is connected to the center bypass passages (5) and (6) in communication with the supply side passages (24) and (25) of the main pumps (2) and (3). (16), the swing motor (7) operating valve (8) and several work devices (12) and (14) control valves (13) (15) are connected in parallel to the supply side pay (24) (25). Branched ferrules 30 and 32 are connected to the respective supply ports of the valves 13 and 15, and the pilot pump The pilot valves 21 and 22 connected to the supply side flow path 20 of the pin 4 are connected to the pilot motors 28 and 28 'by the driving valves 11 and 16. In the hydraulic equipment for heavy equipment connected to (39) (39 '), selector valves (34) and (35) are connected to the swing motor (7) and the working device (12) for operation. And a pilot line 40 immediately before driving in communication with each of the selector valves 34 and 35 is branched to the supply side flow path 20 of the pilot pump 4, and one end of the pilot line 40 is installed. The straight traveling valves 41 and 42 for joining the flow paths of the main pumps 2 and 3 are connected to each other.

Description

Heavy-duty hydraulics that can go straight

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제1도는 종래의 중장비용 유압회로도.1 is a conventional hydraulic circuit diagram for heavy equipment.

제2도는 본 발명에 의한 유압회로도.2 is a hydraulic circuit diagram according to the present invention.

Claims

The main bypass passage 5 connected to the engine 1, the main pump 2, 3, and the pilot pump 4, and in communication with the supply side passages 24, 25 of the main pump 2, 3, respectively. (6) driving motors (9) and (10) actuation valves (11) and (16), swing motor (7) actuation valves (8) and several working devices (12) and (14) regulating valves (13). (15) are connected in parallel, and the ferrules 30 and 32 branched to the supply side flow paths 24 and 25 are connected to the respective valve 13 and 15 supply side ports, and the pilot pump The pilot valves 21 and 22 connected to the supply side flow path 20 of (4) are connected to the pilot motors 28 and 28 'to the driving valves 11 and 16 for operation of the motors 9 and 10. In the hydraulic apparatus for heavy equipment connected to 39) (39 '), selector valves (34) and (35) are installed on the swing motor (7) and the working device (12) for operating valves (8) and (13). The branch running straight pilot line 40 communicating with each of the selector valves 34 and 35 is branch-connected to the supply side flow path 20 of the pilot pump 4, A hydraulic system for straight running that can run straight, characterized in that to connect the straight running valve 41, 42 for joining the flow path of the main pump (2) (3) to one end of the pilot line (40).

2. The hydraulic apparatus of claim 1, wherein an orifice (49, 50) is installed inside the straight traveling valve (41) (42).

2. The hydraulic apparatus of claim 1, wherein an orifice (47) is installed in the back pressure pilot line (46) of the straight traveling valve (41) (42).

※ Note: The disclosure is based on the initial application.