1、DEUTSCHE NORM October 1996 I DIN Performance - Reciprocating internal combustion engines - I ISO3046-6 Part 6: Overspeed protection (IS0 3046-6 : 1990) ICs 27.020 Supersedes December 1983 edition. Hubkolben-Verbrennungsmotoren - Anforderungen - Teil 6: ber- drehzahlschutz (IS0 3046-6 : 1990) This st
2、andard incorporates International Standard IS0 3046-6 Reciprocating internal combustion engines - Performance - Part 6: Overspeed protection. National foreword This standard has been prepared by ISO/TC 70. The responsible German body involved in its preparation was the Normenausschuss Maschinenbau (
3、Mechanical Engineering Standards Committee), Technical Committee Verbrennungsmotoren. Amendments As compared to the December 1983 edition, the specifications of the standard have been brought up date. Previous editions DIN IS0 3046-6: 1983-12. IS0 Standard comprises 4 pages. No pari of this standard
4、 may be reproduced without the prior permission of Y Deutsches Institut frNonunge. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany, s the exclusive right of sale for German Standards (DIN-Normen). Ref. No. DIN IS0 3046-6 : 1996-1 English price group 04 Sales No. 0404 08.00 Page 1 IS0 3046-6 : 1
5、990 Reciprocating internal combustion engines - Performance Part 6: Overspeed protection Foreword IS0 (the International Organization for Standardization) is a worldwide federation of national standards bodies (IS0 inember bodies). The work of preparing International Standards is noi-rnally carried
6、out through 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, govern- mental and non-governmental. in liaison with ISO, also take part in the work. IS
7、0 collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrolechnical standardization. Draft International Standards adopted by the technical committees arc circulated to the member bodies for voting. Publication as an Interna- tional Standard requires ap
8、proval by at least 75 /O of the member bodies casting a vote. International Standard IS0 3046-6 was prepared by Technical Committee ISOTC 70. Internal combustion engines. This third edition cancels and replaces the second edition (IS0 3046-6:1982), of which it is a technical revision. IS0 3046 consi
9、sts of the following parts, (Inder the general title Reciprocating internal combustion engines - performance: - Part I: Standard reference conditions and declarations of power, fuel consumption and lubricating oil consumption - Part 2: Test methods - Part 3: Test measurements - Part 4: Speed governi
10、ng - Pari 5: Torsional vibrations - Part 6: Overspeed protection - Part 7: Codes for engine power Annex A of this pari of IS0 3046 is for information only. Page 2 IS0 3046-6 : 1990 1 Scope This pari of IS0 3046 specifies general requirements and gives definitions for overspeed limiting devices used
11、for the protection of reciprocating internal combustion engines and their driven machinery. It applies to reciprocating internal combustion en- gines for land, rail traction and marine use, exclud- ing engines used to propel road construction and ea ri h-movi n g ma ch in es, ag r i cu I t u ra 1 an
12、d induct ri a I types of tractors, road vehicles and aircraft. 2 Normative reference The following standard contains provisions which, through reference in this text, constitute provisions of this pari of IS0 3046. At the time of publication, the edition indicated was valid. All standards are subjec
13、t to revision, and parties to agreements based on this pari of IS0 3046 are encouraged to investi- gate the possibility of applying the most recent edi- tion of the standard indicated below. Members of IEC and IS0 maintain registers of currently valid International Standards. IS0 3046-4: 1978, Recip
14、rocating infernal combustion engines - Performance - Part 4: Speed governing. 3 Other regulations and requirements 3.1 For engines used on board ships and offshore installations which have to comply with rules of a classification society, the additional requirements of the classification society sha
15、ll be observed. The classification society shall be stated by the customer prior to placing the order. For non-classed engines, such additional reqiiire- ments are in each case subject to agreement be- tween the manufacturer and customer. 3.2 If special requirements from regulations of any other aut
16、hority, for example inspecting and/or leg- islative authorities, have to be met, the authority shall be stated by the customer prior to placing the order. Any further additional requirements shall be subject to agreement between the manufacturer and cus- tomer. 4 Definitions For the purposes of this
17、 part of IS0 3046, the follow- ing definitions apply Definitions relating to typical engine speeds are given in IS0 3046-4. 4.1 overspeed limiting device: Combination of speed sensing and actuating elements which control the fuel supply and/or the intake of air andior the ignition system to the engi
18、ne when a predetermined speed is exceeded 4.2 setting speed of overspeed limiting device, rids: Speed at which the activation of the overspeed lim- iting device IS initiated (see figure 1). 4.3 overspeed setting ratio, frds: Difference between the setting speed of the overspeed limiting device and t
19、he declared speed divided by the declared speed, expressed as a percentage. It is given by 4.4 operating speed of overspeed limiting device, rido: Speed at which, for a given setting speed, the overspeed limiting device starts to operate. NOTE 1 For a given engine the operating speed is de- pendent
20、on the total inertia of the RIC engine, the driven Page 3 IS0 3046-6 : 1990 machinery and device, etc. 4.5 maximum the design of the overspeed limiting permissible speed, haw: Maximum speed specified by the engine or set (engine and driven machinery) manufacturer which lies a safe amount below the s
21、peed limit (see note2 and figure 1). NOTE 2 The speed limit, n, is the maximum calculated speed which can be endured by the engine and its driven machinery without risk of damage. 4.6 declared speed, rq: Engine speed at declared power. 4.7 adjustment range: Range in which the setting speed of oversp
22、eed limiting device can be adjusted. 4.8 response time, fr: Time between reaching and exceeding the setting speed (4.2) and reaching the operating speed (4.4) of the overspeed limiting device. Maximum permissible speed Operating speed of overspeed limiting device Setting speed of overspeed limiting
23、device Response time Figure 1 - Typical speed curve illustrating engine overspeed Ifmiting device response 5 General requirements 5.1 Engines and their driven machinery have a speed limit (see figure 1) which cannot be exceeded without the risk of damage. 5.2 The use of an overspeed limiting device,
24、 and any special requirements for it (see notes 3 and 4) shall be determined by the application andlor by agreement between the manufacturer and the cus- tomer, and/or by inspecting and/or legislative au- thorities, and/or by classification societies specified by the customer (see also note 1). 5.3
25、The manufacturer of the set (engine and driven machinery) shall be responsible for ensuring that the setting speed of the overspeed limiting device is satisfactory with respect to the maximum permissi- ble speed (4.5). The setting speed of the overspeed limiting device (see figurel) shall be specifi
26、ed according to the overspeed limiting device used and its response time, ensuring that all parts of the engine and its driven machinery are protected from damage due to overspeed. 5.4 The overspeed limiting device shall function at all levels of power of the engine. 5.5 The engine manufacturer shal
27、l specify the method and frequency of checking the function of the overspeed limiting device. 6 Overspeed protection features 6.1 The overspeed limiting device shall not affect in any way the normal operation of the engine con- trol systems. However, upon reaching an overspeed condition, the overspe
28、ed limiting device shall over- ride the relevant engine control systems to correct the overspeed condition or to stop the engine. NOTES 3 Manufacturer and customer may agree whether a fail- ure of the control system shall or shall not affect the op- eration of the overspeed limiting device. 4 Manufa
29、cturer and customer may agree whether dam- age or a fault in the overspeed limiting device shall or shall not cause the engine to shut down or indicate acti- vation of the overspeed limiting device by alarm or other means. 6.2 An overspeed shutdown condition shall cause the overspeed limiting device
30、 to latch in the shut- down position. Normally, restarting the engine re- quires manual reset of the latching mechanism. However, automatic reset may be permitted in special applications. Page 4 IS0 3046-6 : 1990 Annex A (informative) Bibliography 11 IS0 2710:1978, Reciprocating internal com- 2 IS0 8528-2:199211, Reciprocating internal com- bustion engine driven alternating current gen- eraiing sets - Part 2: Engines. bustion engines - Vocabulary. i) To be published.
