1、BRITISH STANDARD BS 6525:1984 Incorporating Amendment No. 1 Specification for Design and construction of reservoirs used in hydraulic fluid power systems UDC 621.642.31:621.22BS6525:1984 This British Standard, having been prepared under the directionof the Mechanical Engineering Standards Committee,
2、 was published underthe authority of the BoardofBSI and comes intoeffecton 28September1984 BSI 07-1999 The following BSI references relate to the work on this standard: Committee reference MEE/186 Draft for comment 83/74063 DC ISBN 0 580 13989 1 Committees responsible for this British Standard The p
3、reparation of this British Standard was entrusted by the Mechanical Engineering Standards Committee (MEE/-) to Technical Committee MEE/186 upon which the following bodies were represented: Association of British Mining Equipment Companies Association of Hydraulic Equipment Manufacturers British Comp
4、ressed Air Society British Hydromechanics Research Association British Steel Corporation British Telecommunications Department of Trade and Industry (National Engineering Laboratory) Electricity Supply Industry in England and Wales Federation of Manufacturers of Construction Equipment and Cranes Hea
5、lth and Safety Executive Institution of Mechanical Engineers Machine Tool Industry Research Association Ministry of Defence National Coal Board The following bodies were also represented in the drafting of the standard, through subcommittees and panels: Bath University Library GAMBICA (BEAMA Ltd.) H
6、ydraulic Press Manufacturers Association Institution of Production Engineers Amendments issued since publication Amd. No. Date of issue Comments 6075 February 1990 Indicated by a sideline in the marginBS6525:1984 BSI 07-1999 i Contents Page Committees responsible Inside front cover Foreword ii 1 Sco
7、pe 1 2 Definitions 1 3 Construction 1 4 Preparation for despatch 3 5 Codification 3 6 Labelling 4 Appendix A Guidance for the selection and use of reservoirs 8 Figure 1 Details of reservoir 4 Figure 2 Details of access panels 5 Figure 3 Details of drip tray 6 Table 1 Reservoir envelope dimensions 5
8、Table 2 Dimensions of access panel 6 Table 3 Examples of internal surface treatments 7 Table 4 Heat dissipation by reservoir walls 8 Publications referred to Inside back coverBS6525:1984 ii BSI 07-1999 Foreword This British Standard has been prepared under the direction of the Mechanical Engineering
9、 Standards Committee and is based upon proposals prepared by the Association of Hydraulic Equipment Manufacturers in collaboration with the automobile industry, steel industry, Ministry of Defence (Navy) and Machine Tool Industry Research Association. The dimensions specified in this standard are co
10、mpatible with those specified in the German standard DIN24339, published by Deutches Institut fr Normung. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Sta
11、ndard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages1 to 8, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorpor
12、ated. This will be indicated in the amendment table on theinside front cover.BS6525:1984 BSI 07-1999 1 1 Scope This British Standard specifies basic requirements for the design and construction of reservoirs used in hydraulic fluid power systems. Certain functional and maintenance features are inclu
13、ded which provide manufacturers with freedom of design within the specified basic requirements. The standard is not applicable to reservoirs intended for use with category HFA fluids 1) . Guidance for the selection and use of reservoirs is given inAppendix A. NOTEThe titles of the publications refer
14、red to in this standard are listed on the inside back cover. 2 Definitions For the purposes of this British Standard the following definitions apply. 2.1 breather capacity a measure of the flow rate through an air breather 2.2 nominal fluid capacity the maximum working volume of hydraulic fluid whic
15、h can sensibly be stored in a reservoir 2.3 reservoir a container that stores the working fluid of a hydraulic fluid power system, prevents the ingression of solid or liquid contaminants into the fluid, dissipates heat generated in the fluid, facilitates the separation of air entrained in the fluid,
16、 provides a suitable mounting surface (when required) for system components, and which has accessibility for servicing and facilities for handling 2.4 total volume the total volume of the space within a reservoir 3 Construction 3.1 Capacity 3.1.1 The nominal fluid capacity shall be as given inTable
17、1. 3.1.2 To ensure that there is adequate air space above the fluid surface, the total volume shall be approximately125% the nominal fluid capacity. 3.2 Materials 3.2.1 The reservoir shall be fabricated from suitable rigid materials that are compatible with the fluids to be contained. 3.2.2 All seal
18、 materials shall be compatible with the fluid to be contained within the reservoir. 3.3 Support The reservoir shall be supported in such a manner that the minimum ground clearance shown inFigure 1 is provided to give access to, and permit removal of, the drain plug and to ensure air circulation unde
19、rneath the reservoir. 3.4 Baffles 3.4.1 Reservoirs having a nominal fluid capacity of100L and greater shall be fitted with internal baffles to ensure adequate circulation of all the fluid. 3.4.2 The baffles shall be so located as to separate the return fluid from the suction fluid. 3.4.3 Any apertur
20、es which facilitate flow through the baffles shall be so located as to ensure that the fluid flows along the reservoir sides to give maximum heat dissipation. 3.4.4 The baffles shall have apertures above the maximum fluid level which are of sufficient size to permit air flow between compartments. 1)
21、 Defined in BS6413-4.BS6525:1984 2 BSI 07-1999 3.4.5 The baffles shall be so positioned as to facilitate complete removal of fluid and permit cleaning of all internal surfaces by hand. 3.5 Internal access 3.5.1 At least one access opening, with a covering panel complying with the dimensions given in
22、 Table 2, shall be provided in a vertical wall of the reservoir. 3.5.2 The number and location of the panels shall be such as to facilitate the cleaning of all internal surfaces by hand. 3.5.3 The access panels shall be capable of removal and refitment by one operator and each shall be fitted with a
23、 re-usable elastomeric seal seeFigure 2(b). 3.6 Bottom profile The bottom surface of the reservoir shall be shaped to ensure complete drainage. 3.7 Reservoir top To prevent ingress of contaminants during assembly and/or servicing any threaded accessory mounting holes used to attach components to the
24、 reservoir top shall be of the “blind” type. NOTESuch blind fixings are not necessary when mounting a filler or breather. 3.8 Drip tray 3.8.1 When a drip tray is to be fitted it shall be in accordance with the dimensions given inFigure 3. 3.8.2 The drip tray, if fitted, shall be provided with a drai
25、n point located adjacent to the access panel. 3.9 Connections 3.9.1 Both the fluid inlet and outlet points shall terminate sufficiently below the minimum working level of the fluid so as not to cause aeration of the fluid. 3.9.2 All pipes shall be sealed at their point of entry to the reservoir to p
26、revent any ingress of contamination due to breathing. 3.9.3 Any nut used within the reservoir shall be retained. 3.10 Surface treatment 3.10.1 All ferrous internal surfaces, including access panels, shall be given a protective covering which is compatible with the fluid to be used. Examples are give
27、n inTable 3. 3.10.2 No welding or flame cutting shall be executed after final protective treatment. Any holes drilled subsequently shall be given protective treatment. 3.11 Drain boss 3.11.1 Each reservoir shall be provided with a drain point at the lowest point of the reservoir bottom conveniently
28、located near an access panel to enable remnants of the oil, etc.to be directed through the drain by hand. 3.11.2 The drain boss shall be tapped with a G, or greater, thread complying withBS2779. The face of the boss shall be machined to suit a face seal. 3.11.3 The drain port shall be fitted with a
29、drain plug and face seal. 3.12 Filling facility 3.12.1 Each reservoir shall be fitted with a filling and replenishment facility. NOTEIt is strongly recommended that the filling facility should prevent the direct decanting of fluid into the reservoir from containers. 3.12.2 The filler opening shall b
30、e provided with a well fitting cover to prevent the ingress of contaminants. 3.12.3 The filler cover shall be provided with a captive device to prevent loss on removal. 3.12.4 The filler opening shall be protected by a mesh screen or strainer in the form of a basket which is retained in the filler i
31、n such a manner that it can only be removed by the used of hand tools. 3.12.5 The mesh of the screen shall be not greater than2504m. 3.12.6 The screen, or strainer, shall be capable of withstanding damage by the ingress of foreign objects when filling. 3.12.7 The filler assembly shall be sealed at i
32、ts point of attachment to the reservoir.BS6525:1984 BSI 07-1999 3 3.13 Fluid level indicators 3.13.1 Each reservoir shall have at least one fluid level indicator located adjacent to the filling facility in order that the fluid level is visible during filling. 3.13.2 The indicator(s) shall be flush m
33、ounted or protected from external damage, and shall be sealed at the points of connection with the reservoir. 3.13.3 The indicator(s) shall have marks to indicate maximum and minimum fluid level. 3.14 Breather 3.14.1 At least one breather shall be provided. 3.14.2 Each breather shall be fitted with
34、an air filter having a rating equal to or better than the minimum rating for the system fluid filtration. 3.14.3 Each breather assembly shall be capable of passing air at a rate which ensures that there will not be a pressure differential which is greater than30mbar 2)across the assembly. 3.15 Handl
35、ing and fixing facilities 3.15.1 Each reservoir shall be provided with lifting attachments designed and located so as to permit the reservoir, whilst full of fluid, and any attached equipment, to be lifted without damage to, or distortion of, the reservoir. 3.15.2 It shall also be possible to handle
36、 the reservoir by fork lift truck without damage to, or distortion of, the reservoir. 3.15.3 The reservoir shall be provided with feet possessing fixing holes for foundation anchoring in accordance withTable 1 andFigure 1. The feet shall be of sufficient area to permit levelling by shims or wedges.
37、4 Preparation for despatch 4.1 Prior to despatch or storage the reservoir shall be drained and thoroughly cleaned and have all foreign material removed. 4.2 All openings to the reservoir shall be plugged to prevent the entry of foreign material. 4.3 Accessories which are fitted into, or on to, the r
38、eservoir and which may be vulnerable to damage during transit or storage shall be removed, or suitably protected, and all resultant openings shall be plugged in accordance with4.2. 5 Codification Each reservoir shall be identified by a code comprising the following elements: a) the number of this Br
39、itish Standard, i.e.BS6525 3) ; b) nominal fluid capacity (seeTable 1, column 1); c) fluid classification (seeBS6413-4); d) letter “T”, if drip tray is fitted (see3.8). e) letter “A”, if the fixings holes are at the alternative location. 2) 1 mbar =100N/m 2=100Pa. 3) Marking BS6525 on or in relation
40、 to a product is a claim by the manufacturer that the product has been manufactured to the requirements of the standard. The accuracy of such a claim is therefore solely the manufacturers responsibility. Enquiries as to the availability of third party certification to support such claims should be a
41、ddressed to the Director, Quality Assurance Division, BSI, Maylands Avenue, Hemel Hempstead, Herts HP2 4SQ for certification marks administered by BSI or to the appropriate authority for other certification marks.BS6525:1984 4 BSI 07-1999 An example of such a code is as follows: 6 Labelling The rese
42、rvoir shall carry a label showing the following particulars in a permanent and readily visible form: a) the manufacturers name and brief address; b) the manufacturers type and model number; c) the symbol for a reservoir as specified inBS2917; d) the correct identification of all connections; e) the
43、appropriate code as specified in clause5. Figure 1 Details of reservoir (see Table 1)BS6525:1984 BSI 07-1999 5 Table 1 Reservoir envelope dimensions (as shown inFigure 1) Nominal fluid capacity b 1 b 2 l 1 l 2 l 3 h Approximate oil depth a Fixing holes d 1 Minimum thickness of mild steel plate (excl
44、uding top) b L mm mm mm mm mm mm mm mm mm 40 290 210 415 215 351 410 345 14 3 63 365 285 508 308 444 410 350 14 3 100 460 360 633 393 569 410 350 14 3 160 590 490 810 570 746 410 340 14 3 250 690 590 1010 770 946 430 365 14 3 400 735 635 1514 1274 1450 430 365 14 3 630 945 845 1514 1274 1450 520 450
45、 22 5 800 900 800 2014 1774 1950 520 450 22 5 1000 1065 965 2014 1774 1950 550 475 22 5 1250 1335 1235 2014 1774 1950 550 470 22 5 a See 3.1.2; depth expressed to nearest5mm (assuming stated minimum plate thickness). b If applicable. Figure 2 Details of access panels (seeTable 2)BS6525:1984 6 BSI 07
46、-1999 Table 2 Dimensions of access panels (as shown inFigure 2) Nominal fluid capacity d 1 d 2 d 3 d 4 d 5 Number of mounting studs, N L 40 mm mm mm mm mm 63 100 248 304 268 350 324 4 250 400 600 383 429 393 475 449 6 800 1000 1250 Figure 3 Details of drip tray +0.2 0 +0.2 0BS6525:1984 BSI 07-1999 7
47、 Table 3 Examples of internal surface treatments Fluid a Treatment b Mineral oils (allclassifications) Etch primer Fire resistant fluids c HFB, HFC and HFD Epoxy, 2 pack a See BS 6413-4 for details of fluid classifications. b To be prepared and applied in strict accordance with the coating suppliers
48、 specification. c HFA fluids are outside the scope of this standard.BS6525:1984 8 BSI 07-1999 Appendix A Guidance for the selection and use of reservoirs A.1 Capacity The selected reservoir should have a nominal fluid capacity which is equal to, or greater than, the volume of fluid that can flow fro
49、m the overall system into the reservoir whilst maintaining a safe working level of fluid during the operating cycle. In addition the nominal capacity should be not less than three times the maximum operating flow per minute through the reservoir. A.2 Vibration Where the reservoir top is to be used as a mounting platform precautions should be taken to eliminate the transference of structural borne vibrations to the reservoir. A.3 Heat dissipation The amount of heat which may be dissipated by the reservoir walls will vary according to p
