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1、INTERNATIONAL STANDARD IS0 5675 Second edition 1992-03-01 Agricultural tractors and machinery - General purpose quick-action hydraulic couplers Tracteurs et mat however, couplers conforming to IS0 7241 do not conform to IS0 5675 4.2 Operating requirements 4.2.1 The pressure drop through the coupler
2、shall not be greater than 0,35 MPa (3,5 bar) with a flow of 45 I/min for size 12,5 and of 70 Vmin for size 20 The pressure drop shall be measured in accordance with IS0 7241-2. This International Standard s requirements mean that two coupler parts, one having a conical and the other a ball valve may
3、 be coupled together In this case, care should be taken to ensure that the re- quirements above are fulfilled 4.2.2 The maximum operating pressure shall be 25 MPa (250 bar) The male part of the disconnected coupler shall withstand a pressure of 70 MPa (700 bar). 1 IS0 5675:1992(E) Valve o 1 B -_- Sh
4、ape of neck receiving the bearings in coupled position left to manufacturer Maximum valve travel against stop y17 /- ;i;tX3;$3s6 HRl5N Minimum length of diameter d3 1) Use dimension da unless the valve is spherical Figure 1 - Dimensions Table 1 - Dimensions Dimensions in milllmetres Detail Size 1231
5、) Size 201) Gauge diameter, 4 30,3 37,l 4 min. 23,66 30,4 max. 23,74 30,5 4 min 20,48 29,0 max 20,56 29,l d4 min.*) 475 594 4 4,762 4,762 min. 992 15,9 max. 94 16,l I I I I Detail Size 12,5 ) Size 20 ) 14 min. 1 I,6 17,5 max. 11,8 17,7 4 min. 24 27,5 I6 max. 0,5 076 17 min. 875 13,7 min. 44” 44” d m
6、ax 46” 46” 1) See note in 4.1. 2) When a valve shape other than a ball is used, ap- ply dimension de 3) Radius, chamfer, or combined radius-chamfer permissible 2 IS0 5675:1992(E) 4.2.3 The coupler shall be capable of being con- nected by hand with a pressure of 16 MPa (160 bar) in the male part The
7、connecting force shall not ex- ceed 200 N with a pressure, in the female part, of 0,25 MPa (2,5 bar) for size 12,5 and of 0,100 MPa (1 bar) for size 20 4.2.4 The disconnecting force shall not exceed I,7 kN for size 12,5 and 2,5 kN for size 20 when sub- jected to an internal pressure of 17,5 MPa (175
8、 bar). The disconnecting force shall be measured in ac- cordance with IS0 7241-2 4.2.5 The spillage shall not exceed 2,5 ml for size 12,5 and 9 ml for size 20. A spillage test shall be conducted in accordance with IS0 7241-2 4.2.6 The force required fully to open the valve in the male part, when the
9、re is no pressure in the coupler, shall not exceed 45 N for size 12,5 and 70 N for size 20 4.2.7 If a stop is not provided in the female part, the valve spring load shall be sufficient to prevent clos- ure of the valve in the male part on rapid application of a high flow rate. 5 Location on tractor
10、5.1 Rear-mounted coupler The female part of the coupler shall be mounted as close as practicable to the longitudinal axis of the tractor and to the upper link point. 5.2 Front-mounted coupler The female part of the coupler shall be mounted as described in 5.1. if it is not mounted in the longi- tudi
11、nal axis, it should be positioned to the right-hand side, when viewed from the driving position. If so positioned to the right-hand side, it shall be not more than 1 200 mm rear-wards from the link point of the lower link with the lower links horizontal. IS0 5675:1992(E) Annex A (informative) Biblio
12、graphy I IS0 5676:1983, Tractors and machinery for agriculture and forestry - Hydraulic coupling - Braking circuit. ponenfs - Outside diameters of fubes and inside diameters of hoses 2 IS0 4397:1978, Nuid power systems and com- ponenfs - Connectors and associated com- S IS0 7241-1.1987, Hydraulic f7
13、uid power - Quick-acfion couplings - Part I: Dimensions and requiremenfs. IS0 5675:1992(E) UDC 631.3:621.838.4 Descriptors: agricultural machinery, agricultural tractors, hydraulic couplings, quick action couplings, automatic couplers, specifications, operating requirements, dimensions Price based on 4 pages