1、DEUTSCHE NORM Januarv 1999 Agricu I t ural tractors (IS0 10448 : 1994) Hydraulic pressure for implements DIN IS0 10448 - ICs 65.060.1 O Descriptors: Agricultural machinery, tractors, hydraulic pressure. Supersedes DIN 9679, October 1988 edition. Landwirtschaftliche Traktoren - Hydraulische Leistungs
2、bertragung fr Gerte (IS0 10448 : 1994) This standard incorporates International Standard IS0 10448 Agricultural tractors - Hydraulic pressure for implements. A comma is used as the decimal marker. National foreword This standard has been prepared by ISO/TC 23. The responsible German body involved in
3、 its preparation was the Normenausschu Maschinenbau (Me- chanical Engineering Standards Committee), Section Landmaschinen und Traktoren. Amendments DIN 9679, October 1988 edition, has been superseded by the specifications of DIN IS0 10448 Previous edition DIN 9679: 1988-1 O. IS0 Standard comprises 3
4、 pages. No pari of this standard may be reproduced without the prior permission of Y Deutsches Institut fr Normung e. V., Berlin. wth Verlag GmbH, D-10772 Berlin, has the exclusive right of sale for German Standards (DIN-Normen). Ref. No. DIN IS0 10448 : 1999-0 English price group 04 Sales No. 0404
5、06.99 Page 1 IS0 10448 : 1994 Agricultural tractors Hydraulic pressure for implements Foreword IS0 (the International Organization for Standardization) is a worldwide federation of national standards bodies (IS0 member bodies). The work of preparing International Standards is normally carried out th
6、rough IS0 technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and nongovernmental, in liaison with ISO, also take part in the work. IS0 collabo
7、rates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by a
8、t least 75 % of the member bodies casting a vote. International Standard IS0 1 OM8 was prepared by Technical Committee ISOFC 23, Tractors and machinery for agriculture and forestry, Subcom- mittee SC 4, Tractors. Page 2 IS0 10448 : 1994 1 Scope This International Standard specifies the character- is
9、tics of the hydraulic pressure from agricultural trac- tors to connect hydraulic devices on implements, to permit interchangeable use of various types of im- plements using remote cylinders and other hydraulic devices. It applies to agricultural tractors intended for inter- changeable implements. 2
10、Normative references The following standards contain provisions which, through reference in this text, constitute provisions of this International Standard. At the time of publi- cation, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this
11、 International Standard are encouraged to investigate the possibility of applying the most re- cent editions of the standards indicated below. Members of IEC and IS0 maintain registers of cur- rently valid International Standards. IS0 730-1 :-I, Agricultural wheeled tractors - Rear- mounted three-po
12、int linkage - Part I: Categories I, 2, 3 and 4. IS0 789-1 O:-2), Agricultural tractors - Test pro- cedures - Part IO: Hydraulic power at tractorAmplemen t interface. IS0 5675: 1 992, Agricultural tractors and machinery - General purpose quick-action hydraulic couplers. 1) To be published. (Revision
13、of IS0 730-1:1990) 21 To be published. IS0 6149-1:1993, Connections for fluid power and general use - Ports and stud ends with /SO 261 threads and O-ring sealing - Part 7: Ports with O-ring seal in truncated housing. IS0 6149-2:1993, Connections for fluid power and general use - Ports and stud ends
14、with IS0 267 threads and O-ring sealing - Part 2: Heavy-duty fS series) stud ends - Dimensions, design, test meth- ods and requirements. IS0 61493:1993, Connections for fluid power and general use - Ports and stud ends with IS0 261 threads and O-ring sealing - Part 3: Light-uty IL series) stud ends
15、- Dimensions, design, test meth- ods and requirements. 3 Definitions For the purposes of this International Standard, the following definitions apply. 3.1 external hydraulic service: Source of hydraulic power, derived from the hydraulic system of the agri- cultural tractor, available for use on an i
16、mplement mounted on, coupled to or otherwise used in con- junction with it. 3.2 coupler pair: Pair of female hydraulic couplers compatible with male Couplers specified in IS0 5675, mounted on agricultural tractors and connected to the hydraulic system to allow flow from one coupler to the other. 3.3
17、 available differential pressure: Steady state difference in hydraulic pressure between two coupler parts on the implement side. Page 3 IS0 10448 : 1994 Oil temperature 3.4 maximum pressure: Maximum steady state hydraulic pressure at either male coupler connected to a coupler pair. 65 “C f 5 “C 3.5
18、maximum loop return pressure: Maximum steady hydraulic pressure at the male coupler return- ing flow to a hydraulic system that can reverse the flow through that coupler. 3.6 maximum sump return pressure (1 1 With coupler: Maximum steady state hydraulic pressure at the male coupler returning flow di
19、rectly to the reservoir. (2) Without coupler: Maximum steady state hy- draulic pressure at an M22 x 1,5 or M27 x 2 thread size port in accordance with IS0 6149-1, IS0 6149-2 or IS0 6149-3, returning flow directly to the reservoir. 3.7 peak pressure: Maximum instantaneous hy- draulic pressure at eith
20、er male coupler connected to a coupler pair. 4 Requirements Pressures as listed in table1 should be within their limits as the flow is varied between the specified flow range limits and the loop oil temperature remains within limits. The pressures shall be measured on the implement side (male couple
21、rs) which conform to size 12,5 in IS0 5675. The test method shall be in accordance with IS0 789-10. Table 1 Characteristic I Value Maximum pressure Minimum differential pressure 15 MPa I (150 bar) Maximum loop return pressure 1 MPa I (IO bar) Maximum sump return pressure, with coupler I 0,5 MPa (5 b
22、ar) I On* (2 bar) MPa Maximum sump return pressure, without coupler Peak pressure 29 MPa I (290 bar) Specified flow range O to 30 I/min for category 1 tractors) O to 50 i/min for cat- egories 2 and 3 tractors) NOTE - The specified flow range of O to 30 I/min is recommended for partial- consuming (e.g. 10 I/min to 30 I/min) devices and of O to 50 i/min for continuousconsuming (e.g. 35 i/min to 50 I/min) devices. 1) Categories according to IS0 730-1.
