1、MIL-V-24722 Y8 7979706 0440185 7 INCH-POUND 15 June 1990 - V-Z4722(SH) MILITARY SPECIFICATION . VALVE AND SUBPLATE, SERVO FLOW-CONTROL, ELECIROHYDRAULIC, GENERAL SPECIFICATION FOR This specijkation is approved for use by the Naval Sea Systems Comma Deparhnent of the Navy, and is available for use by
2、 all deparhnents and agencies of the Department of Defense. 1. SCOPE 1.1 Scope, This specification covers the requirements for electrohydraulic, flow-control servovalves and their associated subplates. This type of valve will be installed into a closed-loop, position control servosystem. The valves
3、are designed for either standard or quiet operation and utilize quill-type or face seal. mounting configurations. 1,Z Classification. Electrohydraulic servo-control valves shall be furnished in the configurations, flow ranges, and noise grades listed in the applicable specification sheet. Subplates
4、shall be furnished in accordance with the weight and configuration requirements of the applicable specification sheet . 2, APPLICABLE DOCUMENTS 2,l Government documents. 2.1.1 Specifications, standards, and handbooks. The following specifications, standards, and handbooks form a part of this documen
5、t to the extent specified herein. Unless otherwise specified, the issues of these documents are those listed in the issue of the Department of Defense Index of Specifications and Standards (DODISS) and supplement thereto, cited in the solicitation (see 6.2). Beneficial comments (recommendations, add
6、itions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: Commander, Naval Sea Systems Command, SEA 5523, Depart- ment of the Navy, Washington, DC 20362-5101 by using the self-addressed Standardization Document Improve- ment Proposal (DD Form 14
7、26) appearing at the end of this document or by letter. AMSC NIA Fsc 4810 DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-. MIL-V-24722 48 I 777770b 0440Lb 7 SPECIFICAT
8、IONS MILITARY MIL-v-3 MIL-W-76 MIL W-16878 MIL- W- 16878/17 MIL-L-19140 MILV-24722/1 MIL-V-24722/2 MIL-V-24722/3 FEDERAL J- W- 1 177 PPP-F-320 STANDARDS MILITARY MIGSTD-105 MIL-STD-202 MIGV-24722( SH) Valves, Fittings, and Hanges (Except for Systems Indicated herein); Packaging of Wire and Cable, Ho
9、okup, Electrical, Insulated Wire, Electrical, Insulated, General Specification for Wire, Electrical, Polyvinyl Chloride (PVC) Insulated, 105 OC, 600 Volts, Polyamide Jacket Lumber and Plywood, Fire-Retardant Treated Valve and Subplate, Servo Flow-Control, Electrohydraulic, for O to 50 Gallons Per Mi
10、nute (GPM) and O to 80 GPM How Ranges Valve, Servo How-Control, Electrohydraulic, for O to 10 GPM How Range Valve and Subplate, Servo How-Control, Electrohydraulic, for O to 80 GPM Flow Range Wire, Magnet, Electrical, General Specification for Fiberboard: Corrugated and Solid, Sheet Stock (Container
11、 Grade) and Cut Shapes Sampling Procedures and Tables for Inspection by Attributes Test Methods for Electronic and Electrical Component Parts 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-V-24722 4 I777770b OY4OL87 O W MLSTD-740-2 Structurebo
12、rne Vibratory Acceleration Measurements and Acceptance Criteria of Shipboard Equipment DOD-STD-1399 Section 070 D.C. Magnetic Field Environment; (Metric) Interface Standard for Shipboard Systems, Section 070-Part 1, MULSTD-2193 MS3102 MS3 112 Hydraulic System Components, Ship; (Metric) Connectors, R
13、eceptacle, Electric, Box Mounting, Solder Contacts, AN Type Connectors, Receptacle, Electric, Series 1, Box Mounting, Hange, Bayonet Coupling, Solder Contact (Unless otherwise indicated, copies of federal and military specifications, standards, and handbooks are available from the Naval Publications
14、 and Forms Center, (ATIN: NPODS), 5801 Tabor Avenue, Philadelphia, PA 1912U-5099.) 22 Non-Government publications. The following document(s) form a part of this document to the extent specified herein. Unless otherwise specified, the issues of the documents which are DOD adopted are those listed in
15、the issue of the DODISS- cited in the solicitation. Unless otherwise specified, the issues of documents not listed in the DODISS are the issues of the documents cited in the solicitation (see 6.2). AMERICAN NATIONAL STANDARDS INSTITUm (ANSI) Y32.10 Fluid Power Diagrams, Graphic Symbols for; (DOD Ado
16、pted) (Applications for copies should be made to the American National Standards Institute, 1430 Broadway, New York, NY 10018.) SOCIETY OF AUTOMOTIVE ENGINEERS (SAE) ARP 490 Aerospace Recommended Practice - Electrohydraulic Flow-Coiitrol Servovalves (Applications for copies should be made to the Soc
17、iety of Automotive Engineers, Inc., 400 Commonwealth Drive, Warrendale, PA 15096.) (Non-Government standards and other publications are normally available from the organizations that prepare or distribute the documents. These documents also may be available in or through libraries or other informati
18、onal services,) 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIGV-24722( SH) 23 Order of precedence. -I the event of a conflict between the text of this document and the references cited herein (except for related specification sheets), the text
19、 of this document takes precedence. Nothing in this document, however, supersedes applicable laws and regulations unless a specific exemption has been obtained. 3. REQ- 3.1 Specifiication sheets. The individual valve and subplate requirements shall be as specified herein and in accordance with the a
20、pplicable specification sheet. In the event of any conflict between the requirements of this specification and the specification sheet, the latter shall govern. 32 First article. When specified (see 6.2), a valve shall be subjected to first article inspection (see 6.6) in accordance with 4.2.1. 33 G
21、eneral requirements. General requirements shall be in accordance with MIL-STD-2193. Specific definitions of technical terms used throughout this specification which pertain to servovalve design, construction, performance and testing may be found in the Recommended Terminology section of SAE ARP 490.
22、 3.4 Materiais. Materials shall be limited to those specified in MIL-STD-2193 and the applicable specification sheets. Materials shall be compatible with the fluid, temperature, service and performance requirements specified herein. 3.4.1 Jntemd parts. Flow metering elements within the equipment sub
23、ject to movement or wear shall be hardened on the friction surfaces to a minimum of Rockwell C-56 or equivalent. 35 Design and construction. The general design and construction requirements shall be in accordance with MIGSTD-2193 (see 6.3). 35.1 Structuraidesign. 3.5.1-1 Pressure boundary. 35.1.1.1
24、Proof pressure. The valve and subplate pressure boundaries shall withstand proof pressure levels of 1.5 times the design operating pressures required by the applicable specification sheet. 35.1.1.2 Fatigue. Valve and subplates shall be rated and tested in accordance with MIGSTD-2193 design requireme
25、nts when specified in the applicable specification sheet. 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-V-29722 4A 7777906 0440387 4 3.5.1.13 Bemal leakage. No sign of external leakage, other than slight wetting insufficient to form a drop sh
26、all be exhibited, when subjected to any of the tests required by the applicable specification sheet. 35.1.2 Instailation interfaces. 3.5.1.21 Pattern. The interface pattern for porting and mounting holes shall be in accordance with the applicable specification sheet. 3.5.1.22 Envelope. Dimensions sh
27、all be within the envelope requirements of the applicable specification sheet. 3.5.1.2.3 Electrical connection. Electrical connection to the valve shall be provided by a circular, environment resistant receptacle. Specific connector sizes and pin-to-pin electrical characteristics shall meet the requ
28、irements of the individual specification sheets. 3.5.2 Electrical design. 3.5.2.1 Fungus-resistant materials. Nonmetallic parts shall be inherently nonfungus-nutrient or treated to resist fungus growth. 3.5.22 Magnet wire. Unless otherwise specified in the applicable Specification sheet, magnet wire
29、 shall conform to J-W-1177. Class and Type of insulation shall meet the requirements of the applicable specification sheet. 3.5.23 Lead wire. Lead wire shall conform to MTL-W-76 or MIL-W-16878. 3.5.2.4 coils. Coils shall be evenly wound and insulated to meet the performance requirements specified he
30、rein. The coils shall be completely insulated from the frame and other grounded parts. The coil leads shall not be internally grounded. Coils shall be suitably taped and impregnated as required, to prevent damage under prolonged exposure to humidity and salt-fog environmental conditions. Coils shall
31、 be securely anchored to the frame or other stationary parts in a manner to prevent coil movement or strain on the coil leads. 3.5.2.5 Case. Unless otherwise specified in the applicable specification sheet, the coil housing shall be enclosed and shall be electrically isolated from any electrical cir
32、cuit and shall be magnetically shielded. 3.5.2.6 Insulation resistance. The insulation resistance between separate coils of the same electrical device or between the coils and case ground shall be greater than 10 megohms following a 10 to 15 second application of 500 volts direct current (Vdc). 5 Pr
33、ovided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-V-24722 48 m 7777706 044OL70 O m 3.527 coil resistance. The servovalve torque motor shall have pin-.J-pin resistances as specified in the applicable specification sheet. 3528 Dielectric strength. The
34、unit shall be designed to withstand an initial test potential of 450 volts root mean square (Vrms) plus the rated voltage at 60 hertz (Hz) for a period of 60 seconds when applied between the input leads and the case. 3529 Magnetic field effects. Electrical components of the servovalve shall meet the
35、 requirements of this specification when exposed to an ambient or steady state magnetic field of O to 20 oersteds (Oe) and a magnetic field rate of change of 20 oersteds per second (Oels) unless deleted or otherwise specified in the applicable specification sheet. 353 Hydraulic design. The valve sha
36、ll meet the static, null and dynamic requirements of this specification when operated at the environmental and operating conditions specified in the applicable specification sheet with a test fluid that shall meet the class of cleanliness specified in the applicable specification sheet. 353.1 Rated
37、flow. How from either valve control port shall be adjustable to within rated flow limits specified in the applicable specification sheet when operated at required fluid pressure and temperature conditions. 353.2 Flow limit adjustments. Unless specifically deleted by the applicable specification shee
38、t, each valve shall have two external, manually adjustable, mechanical devices that shall limit maximum flow to the amount required by the applicable specification sheet. These stops shall not affect the valve operation until the torque motor electrical command signal exceeds the stop setting. All a
39、djustments shall be designed in accordance with MIL-STD-2193 requirements for function adjustment screws. 35.3.3 Interfiow. Unless permitted by the applicable specification sheet, there shall be no interflow between supply and return ports when shifting from one position to another. 353.4 Noise. The
40、 assembled valve and subplate shall be designed to operate below the structureborne noise level required by the applicable specification sheet. 35.35 Pilot stage porting. Requirements for multistage valve porting and hydraulic communication shall be satisfied as required by lhe applicable specificat
41、ion sheet. 35.3.6 Internal leakage. The fluid leakage with cylinder ports looped together and with the valve at null shall not exceed the allowable limit of the applicable specification sheet for a new valve. Total internal leakage shall not increase by more than the amount allowed by the applicable
42、 specification sheet when retested after 2 million cycles of operation. 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-V-24722 YB H 799990b 0440393 2 9 MIL-V-24722( SH) 3.5.3.7 Contamination sensitivity. When required by the applicable specifi
43、cation sheet, the valve shall satisfy the internal leakage and hydraulic shifting force requirements of the applicable specification sheet when subjected to a cyclic contamination sensitivity test performed in accordance with specification sheet and MIGSTD-2193 requirements. 3.5.3.7.1 OrEces. Orific
44、es, if required, shall be designed and installed with strainer screen devices in accordance with MICSTD-2193. The location of each strainer screen shall be marked, and each strainer screen shall be cleanable and replaceable without removing or disassembling the valve. 3.5.3.8 Fluid temperature. The
45、valve shall meet internal leakage, flow gain characteristics and noise requirements of this specification when the specified hydraulic fluid is held within the applicable specification sheet temperature or viscosity limits. When required by the applicable specification sheet, the valve shall also me
46、et the extreme temperature functioning requirements in accordance with MTL-STD-2193. 35.3.9 Air removal Valves designed for quiet operation shall incorporate provisions for removing entrapped air. 3.5.3.10 Special seal design. Gland and seal designs which involve the use of either slipper rings or c
47、aps to minimize seizing of smooth surfaces under high pressure must be specifically approved by the contracting activity. 3.53.11 Fluid pressure. The valve shall meet internal leakage, flow gain characteristics and noise requirements of this specification when the specified hydraulic fluid is held w
48、ithin the applicable specification sheet pressure limits. When required by the applicable specification sheet, the valve shall also meet extreme pressure functioning requirements. 3.5.4 Static performance. 35.4.1 Polarity- Positive voltage applied to pins designated by the applicable specification s
49、heet shall open control port CI to supply pressure and control port C2 to return pressure. 3.5.4.2 Flow gain. Now gain shall be within the torque motor current/control flow envelope specified in the applicable specification sheet. 3.5.4.3 Temperature and pressure sensitivity. Requirements which characterize servovalve sensitivity to high and low fluid temperature and surrounding environmental ambient temperature shall be met when required by the applicable specif
