GOST 33274-2015

• gost-33274-2015.pdf (183.79 KiB)
  ГОСТ 33274-2015

GOST 33274−2015 Railway rolling stock. The device protects the drop parts on the way. Methods of control of strength

GOST 33274−2015

INTERSTATE STANDARD

RAILWAY ROLLING STOCK.
THE DEVICE PROTECTS THE DROP PARTS ON THE WAY

Methods of control of strength

Railway rolling stock. Devices to prevent the running gear parts from dropping to the track. Methods of monitoring characteristics of strength

ISS 45.060

Date of introduction 2015−11−01

Preface

Goals, basic principles and main procedure of works on interstate standardization have been established in GOST 1.0−92 «interstate standardization system. Basic provisions» and GOST 1.2−2009 «interstate standardization system. Interstate standards, rules and recommendations on interstate standardization. Rules of development, adoption, application, renewal and cancellation"

Data on standard

1 DEVELOPED by the Open joint-stock company «Scientific-research and design technological Institute of rolling stock» (JSC VNIKTI)

2 recorded by the Interstate technical Committee for standardization MTK 524 «Railway transport"

3 ACCEPTED by the Interstate Council for standardization, Metrology and certification (Protocol dated may 29, 2015 N 77-P)

The adoption voted:

4 by Order of the Federal Agency for technical regulation and Metrology of June 5, 2015 N 567-St inter-state standard GOST 33274−2015 introduced as a national standard of the Russian Federation from November 1, 2015

5 this standard can be applied on a voluntary basis for observance of requirements of technical regulations of the Customs Union:

«On safety of railway rolling stock» and

«On safety of high-speed rail transport"

6 INTRODUCED FOR THE FIRST TIME

Information about the changes to this standard is published in the annual reference index «National standards», and the text changes and amendments — in monthly information index «National standards». In case of revision (replacement) or cancellation of this standard a notification will be published in the monthly information index «National standards». Relevant information, notification and lyrics are also posted in the information system of General use — on the official website of the Federal Agency for technical regulation and Metrology on the Internet

1 Scope

This standard applies to devices of railway rolling stock, protecting the drop parts on the way (hereinafter — safety) device, and establishes methods of control of strength parameters.

2 control Methods

2.1 the Presence of safety devices installed in railway rolling stock, checked visually.

2.2 strength Control safety devices intended for protection from falling parts on the path, carry out the calculation method of the conditions that they must withstand the load F, N, whose value must conform to the following condition:

, (1)

where  — mass of the part, kg;

 — acceleration of free fall, m/s.

The calculation must be performed for all elements of the safety device, including its mount on the rolling stock.

The result should be not less than twice the force of gravity (weight) protects equipment.

3 the Procedure of control

Availability control is a safety device designed to protect from dropping parts on the way for compliance with the design documentation should be carried out on railway rolling stock.

The line strength of belay devices regulatory requirement check through the examination of calculations.

An example of calculation is presented in Appendix A.

The recommended form of the act test the strength of a safety device is provided in exhibit B.

Annex a (informative). An example of the calculation of the strength of the tether ropes of the inclined thrust

Appendix A
(reference)

A. 1 calculation — estimation of strength of elements of designs of trucks, protected from falling items on the way.

A. 2 Initial data

A. 2.1 On the locomotive from falling off the path sloping insure traction of the longitudinal connection of the trucks with the frame of the body.

A. 2.2 Used in the calculation of the design information system of insurance is shown in table A. 1.


Table A. 1

A. 3 Terms of payment

A. 3.1 a Safety device of the inclined thrust (see figure A. 1) should be designed for the reaction forces attributable to each safety device from the double weight of the inclined thrust.

A. 3.2 the Maximum calculated stress in the safety devices must not exceed the yield strength of the material from which they are made.

A. 4 calculation of the strength safety of steel ropes inclined thrust

Safety devices for inclined traction steel ropes for the failure of the primary fastening system are taking the most unfavourable case of fracture or loss of cushion in the connection head of the inclined thrust with the plug on the buffer beam of the frame body of the locomotive and with a bracket on the frame of the truck.

Diagram of the forces acting on the inclined thrust of the failure shown in figure A. 1.

Figure A. 1 — structural diagram of the installation of a safety steel wire ropes for inclined pull

1 — safety rope support 1; 2 — safety rope support 2

Figure A. 1 — structural diagram of the installation of a safety steel wire ropes for inclined pull

The vertical component of the full effort , N (see figure A. 2) the two gravity condition (1) in the most loaded belay rope support 1 (see figure A. 1) is calculated according to the formula

, (A. 1)

where  — distance from the center of mass of the pull rod to a safety rope, mm;

 — distance from center of mass to the thrust axis of fastening, mm;

 — weight of the inclined thrust, N.

.

Figure A. 2 — Calculation scheme of forces acting on the wires supports

Figure A. 2 — Calculation scheme of forces acting on the wires supports

Full longitudinal force , N, in a steel rope is calculated according to the formula

, (A. 2)

where is the vertical component of full-efforts, N;

 — the angle of inclination to the horizon is calculated a safety steel rope, deg.

.

Choose the steel rope 5,8-G-V-W-N-1770 from the breaking strength of the rope .

A safety device ensures that the condition (1) if the calculations provided the following condition:

, (A. H)

where is the breaking strength of the rope, N;

full longitudinal force, N.

7,9>1.

The maximum load that can withstand the safety steel rope, exceeds the maximum design load on steel ropes when the accepted failure of the primary fastening system of the inclined thrust.

The calculation of the strength of other elements of the safety device (clamp, the axes of the fastening steel rope earrings on the buffer beams) is carried out by the relevant methods of calculation of details of machines.

Annex B (reference). The form of the act test the strength of a safety device

Appendix B
(reference)

Act
test the strength of a safety device

____________________________________________________________________
(name of a safety device)

The test was performed

Position and initials

the names of the persons who conducted the test