Railway vehicle axle common terms and explain - 2018
11 -
25 (
Railway vehicle resource platform)
1, the shaft: refers to has been pressed (
Group)
Hold the wheel for rolling bearings, bearing and the function.
2, round about: the single axle and the two wheels for interference fit, the cold pressing of whole railway parts, wheel into rolling bearing of wheel to wheel and the sliding bearing, roller bearing wheel has no axle box is divided into wheel and axle box of double row circular cone roller bearings, cylindrical roller bearing wheel on.
3, completed on shaft: along with the completed (
Overhaul repair)
Truck repair or into the period of maintenance, can according to the period of repairing standard repair, to be completed vehicle loading standard axle.
4, factory repair the wheel: with the factory repair (
Overhaul, including the factory segment)
Axles truck repair, and according to the standard repair in shaft section, and need to be back wheel according to the repair shop repair standards, achieve shop repair truck loading standard axle.
5, the wheels on the new assembly: is a new system of wheel and axle according to the new system (
Prototype)
Technical standard wheel for assembly.
: 6, the wheels to reassemble the old wheel and axle (
Cannibalization)
Old and new wheel and axle (
Change the shaft)
And the new wheel and axle (
Change the wheel)
According to the standard assembly wheel to shop repair technology.
7, to speed up shaft: refers to the applicable to 120 km/h speed shaft.
Of 50 steel axle,
Wheel model of HDS, HDZ, HES or HEZ series, such as the maximum static unbalance value of the new wheel is 125 gm, marked as E3.
Bearing model for 353130 b, 353130 a, with engineering plastic cage SKF197726 or 352226 x2 -
2 rz, etc.
8 axles, weight loss: refers to pack with HDZB, HDZC, HDZD, HEZB, HEZD, HDSA, HESA weight 50 steel wheels, axles and axles axle box double row circular cone roller bearings.
9, wheel speed and weight loss: refers to the speed axles tops with HDZB, HDZC, HDZD, HEZB, HEZD, HDSA, HESA type wheel speed and weight loss, etc.
10, spare wheel (
Wheel to)
: every stored in repair units that can be used well axle (
Wheel to)
And waiting for repair, repair and bad for the dissolution of the wheel and axle (
Wheel to)
Collectively known as the spare wheel (
Wheel to)
。
Shaft (
Wheel to)
When installed on the vehicle, is part of the vehicle, including in the value of the vehicle.
11, the standby axle: every new purchase and has been put into use in maintenance unit (
Have outbound)
New axle, has not assemble wheel on machining, machining repair or stay in the repair of axle, axle are collectively referred to as standby axle for scrap.
12, spare wheel: every new purchase and has been put into use in maintenance unit (
Have outbound)
New wheels, has not assemble wheel on machining, machining repair or stay in the repair of good wheels, to scrap the bad wheels are collectively referred to as spare wheel.
13, back-up bearing: every new purchase and has been put into use in maintenance unit (
Have outbound)
New bearing, good, for maintenance, repair, overhaul and commissioned to send factory bearing overhaul repair factory of bearing generally referred to as the back-up bearing.
14, wheel seat, shaft roundness: wheel or axle journal on the same cross section of the diameter difference between any two perpendicular 1/2.
15, wheel seat, shaft neck cylindricity: wheel or axle shaft neck diameter difference between measurement rules section 1/2;
Wheel seat section diameter of uniform distribution of the cross section measurement of the diameter of the two directions of arithmetic average, journal section diameter of the cross section three direction measurement of the diameter of the uniform distribution of arithmetic average.
16, round head, the difference between the two shoulder to the wheel inside the distance.
17, vertical abrasion wheel rim: refers to the scroll wheel tread from the round wheel rim thickness measured by 12 mm high,
Standard flange thickness)
No greater than 15 mm away from rolling round wheel tread of wheel rim thickness measured by high.
18, rim thickness: rim inner side and inner diameter to line to tread rolling round the radial distance.
19, radial crack plate hole: the wheel disk around the crack is refers to the direction of crack (
From the start point to the direction of the endpoint)
A crack with the circumference of the tangent direction Angle is less than 15 & deg;
Within the scope of the crack is defined as the circumferential crack, beyond the scope of the crack is defined as the radial crack;
Circumferential crack propagation direction significantly deviate from the circumferential direction is defined as the development direction of crack and the original crack direction Angle is greater than 30 & deg;
。
20, crack, in the process, make the continuity of metal damage and forming defects.
Magnetic powder flaw detection, magnetic image characteristics for linear sawtooth, commonly are pointed at both ends, magnetic powder gathering image is irregular, but clear and dense.
21, hair tattoos: is made up of tiny pores of raw materials, pinhole, metallic and non-metallic inclusions, etc. , and form of the forged raw material defects.
Magnetic powder flaw detection, magnetic image features fine linear, straight or slightly curved magnetic powder gathering image rules are long and thin, flat.
22, pseudo magnetic marks: magnetic powder flaw detection, the magnetic mark is characterized by the vast majority of magnetic powder gathered images are scattered, and magnetic inspection, general retrieval condition is bad or not repetition.
23, transverse cracks or transverse hairline: magnetic powder flaw detection, the extension of the magnetic mark line and axle shaft Angle is greater than or equal to 45 & deg;
。
24, longitudinal cracks or longitudinal lines: magnetic powder flaw detection, the extension of the magnetic mark line and axle shaft Angle is less than 45 & deg;
。
