TB/T 1716-2016 English PDF (TB/T1716-2016)

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TB/T 1716-2016: Technical requirement of axial device assembly for railway passenger car
TB/T 1716-2016
RAILWAY INDUSTRY STANDARD OF
THE PEOPLE’S REPUBLIC OF CHINA
ICS 45.060.01
S 33
Replacing TB/T 1716-1986
Technical requirement of axial device assembly for
railway passenger car
ISSUED ON: SEPTEMBER 30, 2016
IMPLEMENTED ON: APRIL 01, 2017
Issued by: National Railway Administration
Table of Contents
Foreword ... 3 
1 Scope ... 5 
2 Normative references ... 5 
3 Working environment ... 5 
4 Requirements before assembly ... 6 
5 Assembly requirements ... 13 
6 Withdrawal requirements ... 18 
7 Marks, records and storage ... 18 
Annex A (informative) Dimensions of axial device parts ... 20 
Technical requirement of axial device assembly for
railway passenger car
1 Scope
This Standard specifies the working environment, requirements before
assembly, assembly requirements, withdrawal requirements, marks, records
and storage for newly-manufactured axial device assembly for railway
passenger car.
This Standard is applicable to the assembly of newly-manufactured axial device
for railway passenger car.
2 Normative references
The following referenced documents are indispensable for the application of
this document. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any
amendments) applies.
TB/T 2235, Rolling bearing in the railway passenger car and wagon
TB/T 2427, Technical Condition of Journal Box Used in Rolling Bearing of
Railway Passenger Cars
TB/T 2548, Railway Vehicle Rolling Bearing Lubricating Grease
3 Working environment
3.1 The sites for thermally assembled bearing inspection, assembly and
storage rooms (storage space before bearing assembly) shall be closed and
meet the following environmental conditions:
a) the temperature range of inspection room, assembly room and storage
room is 16°C~30°C;
b) the relative humidity of inspection room, assembly room is less than or
equal to 60%; the relative humidity of storage room is less than or equal
to 40%;
c) the amount of dust falling in 24h of inspection room is less than or equal
to 60mg/m2; the amount of dust falling in 24h of storage room, assembly
room is less than or equal to 80mg/m2.
3.2 The sites for cold-pressed bearing inspection, assembly, storage rooms
shall be closed and meet the following environmental conditions:
a) the temperature range is 16°C~30°C;
b) the relative humidity of inspection room, assembly room, storage room is
less than or equal to 60%;
c) the amount of dust falling of inspection room in 24h is less than or equal
to 80mg/m2; the amount of dust falling of storage room, assembly room in
24h is less than or equal to 120 mg/m2.
4 Requirements before assembly
4.1 Axle
4.1.1 The dimensions of the axle journal and the dustproof plate seat shall meet
the requirements of the product drawing and comply with the provisions of Table
1. See Annex A for the dimensions of the axle journal and the dustproof plate.
4.1.2 The axle journal diameter, cylindricity and the diameter of dustproof plate
seat shall be measured according to the positions shown in Figure 1:
a) The axle journal diameter shall measure three sections: I, II, III. Measure
two points for each section. The measuring position shall be different by
90°. The arithmetic mean of 2 points is the axle journal diameter of each
section. The diameter difference at 2 points divided by 2 is the roundness
of the axle journal of each section. The arithmetic mean of the two cross-
sectional diameters, II and III, is the axle journal diameter. The difference
between the arithmetic mean of the two cross-section diameters, II and III,
divided by 2 is the cylindricity of the axle journal. The I, II, III cross-
sectional diameter shall not gradually increase towards the end of the
journal over the entire length.
b) The diameter of the dustproof plate seat shall measure the IV section. The
measuring position shall be different by 90°. The arithmetic mean of 2
points is the diameter of the dustproof plate seat.
4.1.3 The axle journal and the surface of the dustproof plate seat shall be free
of burrs, sharp edges, scratches and rusts.
4.5 Dustproof plate
4.5.1 See Annex A for the inner diameter of dustproof plate. Measurements
shall be made at 2 points perpendicular to the middle of the matching surface.
The arithmetic average of the two sizes is the inner diameter of the dustproof
plate.
4.5.2 Each matching surface of the dustproof plate shall be free of burrs, sharp
edges, bruises, scratches and rusts.
4.6 Front cover and rear cover of axial device
4.6.1 Axial device covers shall comply with TB/T 2427 or product drawing.
4.6.2 The front and rear covers of the axial device shall be free of cracks, sharp
edges and burrs. There shall be no rusts on the inside and all assembling sides.
4.6.3 The O-shaped rubber ring installation grooves of the front cover and rear
cover of the axial device shall meet the requirements of the product drawings.
4.7 Shaft end bolt, anti-loosening piece, pressure plate and grounding
device
4.7.1 The shaft end bolts, anti-loosening pieces, pressure plate and grounding
device shall comply with the relevant standards or product drawings,
respectively.
4.7.2 Grounding device parts shall be assembled according to the
manufacturer's matching. Parts from different manufacturers shall not be mixed.
4.8 Other requirements
4.8.1 Wheelsets, bearings, axial device, standard parts (sample rings), bearing
parts, corresponding testing equipment, bearing testers shall be at the same
temperature for more than 8h before measuring. If it cannot be stored in the
same room, the difference between the two room temperatures shall not exceed
5°C.
4.8.2 Wheelsets, bearings, axial device and other parts shall be qualified
products or have product certificate before loading.
4.8.3 Before press-assembling the bearing, remove iron filings and dirt from the
center hole of the shaft end and the bolt hole. Check the journal and dustproof
plate seat. And scrub the journal and dustproof plate seat clean. The grounding
device (including grounding body, axial device cover, friction disc, bearing
pressure plate, sealing ring and related anti-loose parts, fasteners) shall be free
of grease and pollution. The cleanliness of other parts to be assembled shall
meet the requirements of Table 5.
Table 6 -- Requirements for assembly and selecting-matching of rolling
bearing axial device
5.1.1.4 After scrubbing the journal and dustproof plate seat clean, transformer
oil shall be painted on the surface of the journal and dustproof plate. Bearing
inner ring and dustproof plate shall be thermally assembled. The heating
temperature shall not exceed 150°C.
5.1.1.5 After the dustproof plate and bearing inner ring are assembled, the
dustproof plate shall be close to the shaft shoulder. There shall be no warping
and deformation. The contact surface between the end face and the inner circle
as well as between the inner ring and the inner ring shall be close to each other.
Partial clearance is allowed to be no greater than 0.1mm. However, the length
of a single gap in the circumferential direction shall not be greater than 30mm.
The cumulative length shall not be greater than 50mm. After assembling the
bearing inner ring and the journal, it shall be cooled to room temperature before
assembling the axial device assembly.
5.1.1.6 When the outer ring assembly of the bearing is assembled with the axial
device, the outer diameter of the outer ring and the inner diameter of the axial
device shall be coated with transformer oil. When the outer ring assembly of
the bearing is put into the hole of the axial device, the end face of the outer ring
shall be tapped with a nylon hammer (it shall not use a hammer to beat). The
device body (except the cover ears) is: 0.5mm~1.0mm for new rubber seal,
0.5mm~1.5mm for new metal labyrinth.
5.1.3.2 When installing the bolts on the front cover of the axial device, apply a
small amount of lubricant (grease) to the threaded parts of the bolts. Put spring
washers to evenly diagonally fasten. The tightening torque of ordinary nuts and
bolts is 176 N · m ~ 186 N · m. The front cover bolts of the axial device of the
passenger car of which the maximum running speed is not less than 120km/h
shall use anti-loosening and anti-return nuts. The torque is 200 N · m ~ 220
N · m.
5.1.3.3 Sealing shall be applied to the bolt on the upper right corner of the front
cover of the axial device. The blockade shall have the blockade manufacturer
code and the blockade organization code.
5.1.4 Grounding device assembly
When the grounding device is installed, the friction plate shall be installed on
the grounding pressure plate. Use anti-loosening piece to prevent loosening.
The mounting bolt torque is 45 N · m.
5.2 Cold-pressed assembly
5.2.1 Dustproof plate, bearing assembly
5.2.1.1 The bearing inner ring and the journal, the dustproof plate and the
dustproof plate seat shall be assembled as selected-matched. The matching
interference shall meet the requirements of Table 8.
Table 8 -- Selecting-matching requirements for cold-pressed assembly
bearings
mm
No. Item
Interference between inner
diameter of inner circle of bearing
and journal
Interference between inner
diameter of rear block and
dustproof plate seat
1 BT2-8690D type TBU1639605E type 0.043~0.093 0.009~0.131
2 TBU1639435 type 0.051~0.102 0.02~0.112
3 BC2-0098 type 0.043~0.093 0.031~0.106
NOTE: Matching interference is the average interference.
5.2.1.2 If the dustproof plate is thermally assembled, the requirements are the
same as 5.1.1.4.
5.2.1.3 Confirm the position according to the paired numbers of the matched
dustproof plate and bearing. The bearing and the dustproof plate seat shall be
forces of the axial device shall be correct.
5.2.3.2 The gap between the front cover and the axial device body (except the
ears of the axial device cover) shall meet the product drawings or technical
requirements.
5.3 Inspection after assembly
5.3.1 The technical status shall be checked after assembly of the bearing and
axial device. Axial device rotation shall be flexible. For the axial assembly that
uses thermal assembly, the axial movement is 0.8mm ~ 1.6mm.
5.3.2 After assembling the bearing and axial device, it shall carry out a running-
in test of which the rotation speed is not less than 200r/min and the time is not
less than 15min. There shall be no abnormal sound, stagnation, abnormal
temperature rise during the running-in process.
5.3.3 After the bearing axial device is assembled, the lateral span of the axial
device center shall be detected, which shall meet the requirements of the
product drawings.
6 Withdrawal requirements
6.1 Before withdrawing the bearing, it shall use a clean cotton cloth to clean off
the grease and dirt on the end of the bearing.
6.2 When the thermally assembled roller bearing is withdrawn, the temperature-
controlled induction heater shall be used when the bearing inner ring and the
dustproof plate are withdrawn. Heating temperature shall not be greater than
150°C. Inner rings that cause severe discoloration or deformation due to long-
term heating and the heating temperature is greater than 150°C shall not be
used.
6.3 When the cold-pressed roller bearing is withdrawn, the center of the piston
of the press and the center of the axle shall be on the same line when the
bearing and the dustproof plate are withdrawn.
7 Marks, records and storage
7.1 After the front cover of the axial device is assembled, the sign board shall
be installed on the upper right corner of the front cover of the axial device on
the left end of the axle. Special circumstances can be implemented according
to product drawings. The sign board shall be made of galvanized steel plate or
stainless-steel plate with a thickness of 0.5mm ~ 1.0mm. Mark with shaft