1、 g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58Hydraulic power beyondICS 65.060.10Agricultural and forestry tractors and implements BRITISH STANDA
2、RDBS ISO 17567:2005BS ISO 17567:2005This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 March 2007 BSI 2007ISBN 978 0 580 50439 6Amendments issued since publicationAmd. No. Date Commentscontract. Users are responsible for its correct applicati
3、on.Compliance with a British Standard cannot confer immunity from legal obligations. National forewordThis British Standard was published by BSI. It is the UK implementation of ISO 17567:2005.The UK participation in its preparation was entrusted to Technical Committee AGE/6, Agricultural tractors an
4、d forestry machinery.A list of organizations represented on AGE/6 can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a Reference numberISO 17567:2005(E)INTERNATIONAL STANDARD ISO17567First edition2005-05-01Agricultural and forestr
5、y tractors and implements Hydraulic power beyond Tracteurs agricoles et forestiers et instruments Puissance hydraulique externe disponible BS ISO 17567:2005ii iiiForeword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodie
6、s). The work of preparing International Standards is normally carried out through ISO 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 n
7、on-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Pa
8、rt 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies castin
9、g a vote. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 17567 was prepared by Technical Committee ISO/TC 23, Tractors and machinery for agricul
10、ture and forestry, Subcommittee SC 4, Tractors. BS ISO 17567:2005iv Introduction The implements and mounted equipment attached to agricultural and forestry tractors requiring the hydraulic power and control offered by the tractors hydraulic system have greatly increased in number, complexity and nee
11、d for efficient operation in recent years. As a result, many such implements include specialized valves and require the capability to easily connect, interface and control the tractors implement hydraulic system. ISO 17567 sets forth the interfaces necessary to effectively and properly accomplish th
12、e connection of the various tractor and implement combinations. BS ISO 17567:20051Agricultural and forestry tractors and implements Hydraulic power beyond 1 Scope This International Standard specifies the hydraulic power beyond of tractors used in agriculture and forestry, and the number, type, capa
13、city and identification of the associated connections between these tractors and their implements. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the lates
14、t edition of the referenced document (including any amendments) applies. ISO 789-10, Agricultural tractors Test procedures Part 10: Hydraulic power at tractor/implement interface ISO 5675:1992, Agricultural tractors and machinery General purpose quick-action hydraulic couplers ISO 5598, Fluid power
15、systems and components Vocabulary ISO 10448:1994, Agricultural tractors Hydraulic pressure for implements ISO 16028:1999, Hydraulic fluid power Flush-face type, quick-action couplings for use at pressures of 20 MPa (200 bar) to 31,5 MPa (315 bar) Specifications 3 Terms and definitions For the purpos
16、es of this document the following definitions apply. 3.1 hydraulic power beyond agricultural or forestry tractors hydraulic power and/or control features, available to implements independent of the tractors remote valves 3.2 pressure port connection used to provide access to a tractors main source o
17、f hydraulic power 3.3 return port connection for the return flow from an implement or attached equipment 3.4 load signal (pressure) port connection used to provide access to a tractors control signal network BS ISO 17567:20052 3.5 drain port connection used to provide access to a tractors lowest pre
18、ssure return port for flows such as motor internal leakage 3.6 hydraulic power beyond kit kit provided by agricultural and forestry tractor manufacturers that includes all brackets, fittings, seals, lines, quick couplings, dust protection, instructions for installation including flow class reference
19、, load signal (pressure) drop values, and return pressure on the tractor, and instructions for connection of implements to the hydraulic power beyond ports 4 Systems and interfaces (see Figures 1 to 4) 4.1 Open-centre hydraulic system On agricultural and forestry tractor systems with open-centre hyd
20、raulic valves as defined in ISO 5598, pressure, return and drain ports are required. The schematic of Figure 1 shows two basic means for providing hydraulic power beyond interfaces (power beyond priority or tractor valve priority) for a typical hydraulic motor connected to a tractor with an open-cen
21、tre hydraulic system. 4.2 Constant-pressure closed-centre hydraulic system On agricultural and forestry tractor systems with closed-centre hydraulic valves as defined in ISO 5598, pressure, return and drain ports are required. The schematic of Figure 2 shows one basic means for providing a hydraulic
22、 power beyond interface for a typical hydraulic motor connected to a tractor with a constant-pressure closed-centre hydraulic system. 4.3 Load-sensing closed-centre hydraulic system On agricultural and forestry tractor systems with load-sensing hydraulic valves, pressure, return, load signal (pressu
23、re) and drain ports are required. The schematic of Figure 3 shows one basic means for providing a hydraulic power beyond interface for a typical hydraulic motor connected to a tractor with a load-sensing hydraulic system. The signal from the implement connected to the load signal (pressure) port mus
24、t be resolved with the load signal from the tractors valves before being sent to the pump. This resolution valving or circuitry shall be provided by the tractor manufacturer. The implement manufacturer shall ensure that the implements load signal is vented when all external functions are in their ho
25、ld position. 4.4 Load-sensing closed-centre hydraulic system with fixed displacement pump The schematic of Figure 4 shows one basic means for providing a hydraulic power beyond interface for a typical hydraulic motor connected to a tractor with a load-sensing closed-centre hydraulic system. The sign
26、al from the implement connected to the load signal (pressure) port must be resolved with the load signal from the tractors valves before being sent to the pump. This resolution valving or circuitry shall be provided by the tractor manufacturer. The implement manufacturer shall ensure that the implem
27、ents load signal is vented when all external functions are in their hold position. BS ISO 17567:200535 Flow classes Hydraulic power beyond flow classes as specified for a single connection shall be in accordance with Table 1. Table 1 Flow classes Class Flow L/min a,b1 Up to 45 2 45 to 100 3 Above 10
28、0 aPressure port flow available can vary with system type and tractor system function. bAt rated engine speed. 6 Hydraulic power beyond 6.1 General The tractor manufacturer should provide one or more sets of hydraulic power beyond ports. The tractor manufacturer shall specify the maximum hydraulic p
29、ower beyond flow class and system type for each set of hydraulic power beyond ports. Pressure and temperature characteristics shall be in accordance with ISO 10448:1994, Table 1. Drain port back pressure shall not exceed 100 kPa, gauge, at 20 L/min, and 25 kPa, gauge, at zero flow conditions. When q
30、uick-action couplings are used, female halves conforming to ISO 16028 (non-preferred ISO 7241 or ISO 5675), shall be mounted on the tractor in order to create a uniform system interface between different manufacturers and system types. NOTE If reference is made to ISO 7241, size 19 can be considered
31、 as corresponding to size 20. The preferred sizes of hydraulic power beyond quick-action couplings in accordance with ISO 16028 are given in Table 2. Table 2 Quick-action couplings Hydraulic power beyondPreferred quick-action coupling sizebFlow classaPressure Return Load signal Drain 1 12,5 2 12,5 1
32、9 3 19 25 6,3 Size 10 aThe declared quick-action coupling class usage may be varied to suit or enhance the power beyond application. bUsage of non-preferred quick-action couplings should conform in size to this table, but system performance characteristics will vary. BS ISO 17567:20054 The quick-act
33、ion pressure coupling shall have a self-sealing capability but shall not have connect-while-engine-is-running capability. The quick-action return, load signal (pressure) and drain couplings may have connect-under-pressure capability, but shall have the flow path open after connection. All quick-acti
34、on couplers should have a breakaway functionality as defined in ISO 5598. The maximum pressure drop from the supply port of the tractor to the load signal of the work port of the implement control valve shall be considered when designing power beyond circuits. The tractor manufacturer should state t
35、he load signal (pressure) pressure drop available at rated flow between the power beyond pressure and load signal (pressure) quick-action couplings. The tractor manufacturer shall provide information as part of the hydraulic power beyond kit for connection of hydraulic power beyond circuits; while t
36、he implement manufacturer shall provide instructions for connection of the implement to the tractor system types for which it is designed. 6.2 Port and quick-action coupling identification The ports on the tractor and the quick-action couplings that are installed as part of the hydraulic power beyon
37、d kit should be identified using the following alphabetical symbols. Pressure port: P Return port: R Load signal (pressure) port: LS Drain port: D 7 Testing hydraulic power beyond systems capabilities Flow and power from hydraulic power beyond pressure ports should be measured according to ISO 789-1
38、0, with the engine running at rated speed, and the return port pressure measured both with and without quick-action couplings. Drain port pressure should be measured according to ISO 789-10, both with and without quick-action couplings. For flow, see 6.1. Load signal (pressure) pressure drop availab
39、le should be measured as the maximum pressure differential achievable across a throttle valve mounted close to the pressure port at rated flow. NOTE For the testing of load-sensing closed-centre hydraulic systems, see Figure 5. 8 Location of connections The connections may be located according to IS
40、O 5675. BS ISO 17567:20055Key 1 tractor circuit 2 implement circuit 3 tractor valve priority 4 power beyond priority Figure 1 Open-centre hydraulic system BS ISO 17567:20056 Key 1 tractor circuit 2 implement circuit Figure 2 Constant-pressure closed-centre hydraulic system Key 1 tractor circuit 2 im
41、plement circuit Figure 3 Load-sensing closed-centre hydraulic system BS ISO 17567:20057Key 1 tractor circuit 2 implement circuit Figure 4 Load-sensing closed-centre hydraulic system with fixed displacement pump BS ISO 17567:20058 Key 1 tractor circuit 2 test circuit Figure 5 Load-sensing closed-cent
42、re hydraulic system Power beyond test circuit BS ISO 17567:20059Bibliography 1 ISO 1219-1:1991, Fluid power systems and components Graphic symbols and circuits diagrams Part 1: Graphic symbols 2 ISO 7241-1:1987, Hydraulic fluid power Quick-action couplings Part 1: Dimensions and requirements BS ISO
43、17567:2005BS ISO BSI389 Chiswick High RoadLondonW4 4AL17567:2005BSI British Standards InstitutionBSI is the independent national body responsible for preparing British Standards. It presents the UK view on standards in Europe and at the international level. It is incorporated by Royal Charter.Revisi
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