1、 Reference number ISO 17567:2005(E) ISO 2005INTERNATIONAL STANDARD ISO 17567 First edition 2005-05-01 Agricultural and forestry tractors and implements Hydraulic power beyond Tracteurs agricoles et forestiers et instruments Puissance hydraulique externe disponible ISO 17567:2005(E) PDF disclaimer Th
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6、ster. ISO copyright office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ii ISO 2005 All rights reservedISO 17567:2005(E) ISO 2005 All rights reserved iiiForeword ISO (the International Organization for
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10、s an International Standard requires approval by at least 75 % of the member bodies casting 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. I
11、SO 17567 was prepared by Technical Committee ISO/TC 23, Tractors and machinery for agriculture and forestry, Subcommittee SC 4, Tractors. ISO 17567:2005(E) iv ISO 2005 All rights reservedIntroduction The implements and mounted equipment attached to agricultural and forestry tractors requiring the hy
12、draulic power and control offered by the tractors hydraulic system have greatly increased in number, complexity and need 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 tract
13、ors implement hydraulic system. ISO 17567 sets forth the interfaces necessary to effectively and properly accomplish the connection of the various tractor and implement combinations. INTERNATIONAL STANDARD ISO 17567:2005(E) ISO 2005 All rights reserved 1Agricultural and forestry tractors and impleme
14、nts Hydraulic power beyond 1 Scope This International Standard specifies the hydraulic power beyond of tractors used in agriculture and forestry, and the number, type, capacity and identification of the associated connections between these tractors and their implements. 2 Normative references The fo
15、llowing referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 789-10, Agricultural tractors Test procedures Part
16、10: Hydraulic power at tractor/implement interface ISO 5675:1992, Agricultural tractors and machinery General purpose quick-action hydraulic couplers ISO 5598, Fluid power systems and components Vocabulary ISO 10448:1994, Agricultural tractors Hydraulic pressure for implements ISO 16028:1999, Hydrau
17、lic 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 purposes of this document the following definitions apply. 3.1 hydraulic power beyond agricultural or forestry tractors hydraulic powe
18、r 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 of hydraulic power 3.3 return port connection for the return flow from an implement or attached equipment 3.4 load signal (pressu
19、re) port connection used to provide access to a tractors control signal network ISO 17567:2005(E) 2 ISO 2005 All rights reserved3.5 drain port connection used to provide access to a tractors lowest pressure return port for flows such as motor internal leakage 3.6 hydraulic power beyond kit kit provi
20、ded by agricultural and forestry tractor manufacturers that includes all brackets, fittings, seals, lines, quick couplings, dust protection, instructions for installation including flow class reference, load signal (pressure) drop values, and return pressure on the tractor, and instructions for conn
21、ection 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 hydraulic valves as defined in ISO 5598, pressure, return and drain ports are required. The schematic
22、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-centre hydraulic system. 4.2 Constant-pressure closed-centre hydraulic system On agricultural and fore
23、stry 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 power beyond interface for a typical hydraulic motor connected to a tractor with a constant- press
24、ure 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 (pressure) and drain ports are required. The schematic of Figure 3 shows one basic means for providing a
25、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 must be resolved with the load signal from the tractors valves before being sent to the pump. This re
26、solution 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 hold position. 4.4 Load-sensing closed-centre hydraulic system with fixed displacement pump The sche
27、matic 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 signal from the implement connected to the load signal (pressure) port must be resolved with the load
28、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 hold position. ISO 17567:2005(
29、E) ISO 2005 All rights reserved 35 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 100 aPressure port flow available can vary with system type and tracto
30、r 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 power beyond flow class and system type for each set of hydraulic pow
31、er 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 quick-action couplings are used, female halves conforming to ISO 1602
32、8 (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 as corresponding to size 20. The preferred sizes of hydraulic power
33、 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 19 3 19 25 6,3 Size 10 aThe declared quick-action coupling class usag
34、e 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. ISO 17567:2005(E) 4 ISO 2005 All rights reservedThe quick-action pressure coupling shall have a self
35、-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-action couplers should have a breakaway fu
36、nctionality 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 the load signal (pressure) pressure dro
37、p 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 the implement manufacturer shall provid
38、e 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 beyond kit should be identified using the f
39、ollowing 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 789-10, with the engine running at rated sp
40、eed, 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 available should be measured as the maximum p
41、ressure 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 ISO 5675. ISO 17567:2005(E) ISO 2005 All
42、 rights reserved 5Key 1 tractor circuit 2 implement circuit 3 tractor valve priority 4 power beyond priority Figure 1 Open-centre hydraulic system ISO 17567:2005(E) 6 ISO 2005 All rights reservedKey 1 tractor circuit 2 implement circuit Figure 2 Constant-pressure closed-centre hydraulic system Key 1
43、 tractor circuit 2 implement circuit Figure 3 Load-sensing closed-centre hydraulic system ISO 17567:2005(E) ISO 2005 All rights reserved 7Key 1 tractor circuit 2 implement circuit Figure 4 Load-sensing closed-centre hydraulic system with fixed displacement pump ISO 17567:2005(E) 8 ISO 2005 All right
44、s reservedKey 1 tractor circuit 2 test circuit Figure 5 Load-sensing closed-centre hydraulic system Power beyond test circuit ISO 17567:2005(E) ISO 2005 All rights reserved 9Bibliography 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 ISO 17567:2005(E) ICS 65.060.10 Price based on 9 pages ISO 2005 All rights reserved
