TB/T 2075.13-2020 (TB/T2075.13-2020, TBT 2075.13-2020, TBT2075.13-2020) & related versions
TB/T 2075.13-2020: PDF in English (TBT 2075.13-2020)
TB/T 2075.13-2010
RAILWAY INDUSTRY STANDARD OF
THE PEOPLE’S REPUBLIC OF CHINA
ICS 29.280
S 82
Replacing TB/T 2075.38-2002
Fittings for Overhead Contact System in Electrification
Railway - Part 13: Tension Assembly Wheel
ISSUED ON: JUNE 09, 2010
IMPLEMENTED ON: DECEMBER 01, 2010
Issued by: Ministry of Railways of the PRC
Table of Contents
Foreword ... 3
1 Scope ... 5
2 Normative References ... 5
3 Type, Composition and Label of Tension Assembly Wheel ... 6
4 General Property Requirements of Tension Assembly Wheel ... 8
5 Fittings in Tension Assembly Wheel ... 9
6 Inspection Rules and Test Methods ... 17
7 Mark and Package ... 18
Fittings for Overhead Contact System in Electrification
Railway - Part 13: Tension Assembly Wheel
1 Scope
This Part specifies the type, composition, label, material, technical requirements,
inspection rules, test methods, mark and package of the tension assembly wheel.
This Part is applicable to the tension assembly wheel of fittings for overhead contact
system in electrification railway.
2 Normative References
The provisions in following documents become the provisions of this Part through
reference in this Part of TB/T 2075. For dated references, the subsequent amendments
(excluding corrigendum) or revisions do not apply to this Standard, however, parties
who reach an agreement based on this Standard are encouraged to study if the latest
versions of these documents are applicable. For undated references, the latest edition
of the referenced document applies.
GB/T 31.1-1988 Hexagon Bolts with Split Pin Hole on Shank - Product Grade A
and B
GB/T 41-2000 Hexagon Nuts-Product Grade C (eqv ISO 4034:1999)
GB/T 95-2002 Plain Washers – Product Grade C (ISO 7091:2000, EQV)
GB/T 68-2000 Slotted Countersunk Flat Head Screws (eqv ISO 2009:1994)
GB/T 91-2000 Split Pins (eqv ISO 1234:1997)
GB/T 97.1-2002 Plain Washers – Product Grade A (eqv ISO 7089:2000)
GB/T 196-2003 General Purpose Metric Screw Threads - Basic Dimensions (ISO
724:1993, MOD)
GB/T 283-2007 Rolling Bearings - Cylindrical Roller Bearings - Boundary
Dimensions
GB/T 699-1999 Quality Carbon Structural Steels
GB/T 700-2006 Carbon Structural Steels (ISO 630:1995, NEQ)
5.1.3 Label example of ratchet-wheel
Example: Marking for the wheel body of Type-Z tension assembly wheel is as follows:
Type-Z tension assembly wheel body TB/T 2075.13(Z)–10
5.1.4 Ratchet-wheel materials
5.1.4.1 The ratchet-wheel body and end cover shall, according to GB/T 1173-1995,
adopt high-quality cast aluminum-magnesium-silicon alloy (ZA1Si7Mg1A) with code of
ZLl14A; the alloy use T5 (solid solution treatment and incomplete artificial aging)
treatment; the tensile strength σb ≥290MPa, elongation σ5 ≥ 2%.
5.1.4.2 The ratchet-wheel shaft shall, according to GB/T 699-1999, adopt high-quality
carbon structural steel with designation of No.45; and shall be quenched and tempered.
5.1.4.3 The bearing shall conform to GB/T 283-2007; adopt the inner ring single rib
cylindrical roller bearing with designation of NJ2305E. The connection between
ratchet-wheel shaft and the ratchet-wheel body shall be double bearing structure.
5.1.4.4 The wedge and balance wheel body shall, according to GB/T 11352-2009,
adopt the cast carbon steel with designation of ZG 270-500.
5.1.4.5 Pin, countersunk head screw, and oil-filling screw are all in accordance with
GB/T 1220-2007. Pin adopts austenitic stainless steel with designation of 06Cr19Ni10;
the rest all adopts the austenitic stainless steel with designation of 12Cr18Ni9.
5.1.4.6 Fastener (bolt, nut, washer) that adopts austenitic stainless steel, where the
mechanical properties of bolt and nut shall meet the following requirements with tensile
strength σb ≥700MPa, non-proportional elongation σp0.2 ≥450MPa, elongation after
break δ ≥0.4d.
5.1.4.7 The ratchet-wheel connecting frame shall, according to GB/T 700-2006, adopt
the carbon structural steel with designation of Q235A.
5.1.5 Technical requirements of ratchet-wheel
5.1.5.1 The general technical requirements of ratchet-wheel shall conform to the
provisions of TB/T 2073.
5.1.5.2 The requirements for manufacturing process of ratchet-wheel is as follow:
a) The ratchet-wheel body and end cover are manufactured by metal mold low-
pressure casting process; its casting state is JB (metal mold casting +
modification treatment).
b) The ratchet-wheel body has no casting defects; the grooves of wheel body are
Figure 4 – Schematic Diagram for Appearance Structure of Ratchet-Wheel
Bracket
5.3.2 Reference weight of ratchet-wheel bracket
Type-Z is 16.5kg; Type-F is 14.5kg.
5.3.3 Label example of ratchet-wheel bracket
Example 1: the label of Type-Z forward-brake ratchet-wheel bracket is as follows:
Type-Z ratchet-wheel bracket TB/T 2075.13B(Z)–10
Example 2: the label of Type-F reverse-brake ratchet-wheel bracket is as follows:
Type-F ratchet-wheel bracket TB/T 2075.13B(F)–10
5.3.4 Materials of ratchet-wheel bracket
5.3.4.1 The hook, connection plate, long bolt, washer, and nut in the wheel bracket
shall, according to GB/T 700-2006, adopt the carbon structural steel with designation
of Q235A. The riser and connecting pipe shall, according to GB/T 699-1999, adopt the
high-quality carbon structural steel with designation of No.20.
5.3.4.2 The brake plate shall, according to GB/T 699-1999, adopt the high-quality
carbon structural steel with designation of No.45.
5.3.4.3 Bolt, nut, washer and spring washer for fixing brake plate shall be accordance
with GB/T 1220-2007; thereof, the bolt adopts the austenitic stainless-steel with
designation of 06Cr19Ni10; nut, washer, and spring washer adopt the austenitic
stainless-steel with designation of 12Cr18Ni9.
5.3.5 Technical requirements of ratchet-wheel bracket
5.3.5.1 The general technical requirements of ratchet-wheel bracket shall conform to
the provisions of TB/T 2073.
5.3.5.2 The manufacturing process requirements of ratchet-wheel bracket are as
follows:
a) The hook shall be manufactured by metal die forging process; the connecting
plate shall be manufactured by profile stamping process;
b) The ratchet-wheel bracket shall use special tools to perform assembly-welding.
After welding, ensure the error between the two sides of the hook opening and
the brake plate is less than ±0.25mm. After the assembly-welding, the surface
shall, according to the provisions of TB/T 2073, perform the Grade-2 hot-dip
5.4.2 Reference weight of balance wheel
The balance wheel is 3.16kg.
5.4.3 Label example of balance wheel
Example: the label of balance wheel for connecting ratchet-wheel is as follows:
Balance wheel TB/T 2075.13C–10
5.4.4 Materials of balance wheel
5.4.4.1 The balance wheel body shall, according to GB/T 11352-1989, adopt the
carbon steel with designation of ZG 270-500.
5.4.4.2 The connecting plate, bolt pin, nut and washer of balance wheel, shall
according to GB/T 700-2006, adopt carbon structural steel with designation of Q235A.
5.4.4.3 The cotter pin shall be in accordance with GB/T 1220-2007; the bolt shall adopt
the austenitic stainless-steel with designation of 0Cr18Ni9.
5.4.5 Technical requirements of balance wheel
5.4.5.1 The technical requirements of balance wheel shall conform to the provisions of
TB/T 2073.
5.4.5.2 The manufacturing process requirements of balance wheel are as follows:
a) The balance wheel body shall be manufactured by precision casting process; the
surface shall be performed Grade-3 hot-dip galvanizing according to TB/T 2073;
b) The surface of the parallel drawing plate shall be performed Grade-2 hot-dip
galvanizing according to TB/T 2073;
c) The bolt and nut shall be performed Grade-1 hot-dip galvanizing according to
TB/T 2073.
5.4.5.3 The requirements for fastener of balance wheel are as follows:
a) The threads of bolt pin and nut shall conform to GB /T 196-2003;
b) The bolt pin shall conform to the provisions of GB/T 31.1-1988;
c) The nut shall conform to the provisions of GB/T 41-2000;
d) The washer shall conform to the provisions of GB/T 95-2002;
e) The cotter pin shall conform to the provisions of GB/T 91-2000.
a) The ratchet-wheel base is manufactured by the profile stamping and welding
process; and the surface shall be performed Grade-2 hot-dip galvanizing
according to the provisions of TB/T 2073.
b) The bolt pin and nut shall be performed Grade-1 hot-dip galvanizing according to
the requirements in TB/T 2073.
5.5.5.3 The requirements for fastener of ratchet-wheel base are as follows:
a) The threads of bolt pin and oil-filling screw shall conform to GB/T 196-2003;
b) The countersunk head screw shall conform to GB/T 68-2000;
c) The bolt shall conform to GB/T 5783-2000;
d) The nut shall conform to GB/T 6170-2000;
e) The washer shall conform to GB/T 97.1-2002;
f) The spring washer shall conform to GB/T 859-1987;
g) Cotter pin shall conform to GB/T 91-2000.
5.5.5.4 The requirements for property of ratchet-wheel base are as follows:
a) Type-A max. working load is 27kN; breaking load is no less than 81kN;
b) Type-B max. working load is 27kN; breaking load is no less than 81kN.
5.6 Wedge clamp
The wedge clamp for compensating rope shall conform to the requirements and
provisions of TB/T 2075.17.
6 Inspection Rules and Test Methods
6.1 Inspection rules
The inspection rules of tension assembly wheel shall be carried out according to the
provisions of TB/T 2073.
6.2 Test methods
6.2.1 The test methods for each part in the tension assembly wheel shall conform to
the provisions and requirements of TB/T 2074.
6.2.2 After fatigue test, the tension assembly wheel shall:
......
| Standard ID | TB/T 2075.13-2020 (TB/T2075.13-2020) | | Description (Translated English) | (Catenary Components for Electrified Railway Part 13: Ratchet Compensation Device) | | Sector / Industry | Railway & Train Industry Standard (Recommended) | | Word Count Estimation | 8,866 | | Date of Issue | 2020-10-30 | | Date of Implementation | 2021-05-01 | | Older Standard (superseded by this standard) | TB/T 2075.13-2010 | | Regulation (derived from) | National Railway Science and Technology Law (2020) No. 44 | | Issuing agency(ies) | National Railway Administration |
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