Wheels and crane rail tracks
Wheels and crane rail tracks are an integral part of the operating mechanism of gantry and bridge cranes.
Classification of wheels: wheels are divided into double-rim wheels (code SL). The height of the rim is 25mm to 30mm. It is widely used in the traveling mechanism of bridge gantry cranes. Single rim wheel (codenamed DL), with a rim height of 20mm to 25mm, is mostly used for traveling wheels of crane trolleys with a diameter of less than 500mm. The installation is that one end of the rim is arranged outside the track. The use of rimless wheels (code-named WL) is to prevent rail gnawing caused by the friction between the rail rim and the rail, but it is easy to derail and its use is limited. See the table below for the basic dimensions of the wheels.
crane wheel types
| Standard Size（mm） | |||
| D | D1 | B | B1 |
| 100 | 130 | 80~100 | 95~100 |
| 125 | 140 | 80~100 | 95~100 |
| 160 | 190 | 90~100 | 95~100 |
| 200 | 230 | 95~100 | 95~100 |
| 250 | 280 | 95~140 | 95~140 |
| 315 | 350 | 95~210 | 95~210 |
| 400 | 440 | 105~210 | 105~210 |
| 500 | 540 | 105~210 | 105~210 |
| 630 | 680 | 120~210 | 120~210 |
| 710 | 760 | 140~210 | 140~210 |
| 800 | 850 | 140~210 | 140~210 |
| 900 | 950 | 145~220 | 140~220 |
| 1000 | 1060 | 145~220 | 140~220 |
| (1250) | 1310 | 145~220 | 140~220 |
| Note: The basic parameters in this table (except those in brackets) should be used first | |||
Wheel Tread: Wheel tread shapes are cylindrical, conical, and drum-shaped. The cylindrical shape is mostly used for driven wheels and can also be used for driving wheels. The conical wheel is mostly used as the driving wheel of the crane cart, and the common taper is 1:10. When installing, the end with the larger diameter of the wheel should be installed on the inner side of the span, so that the operation is stable and the automatic straightening effect is good. The drum wheel tread is arc-shaped, and mainly used for electric hoist suspension trolleys and circular track cranes. The size of the wheel is mainly determined by the wheel pressure. As the wheel pressure increases, the diameter also becomes larger. However, the diameter cannot be too large, so the method of increasing the number of wheels is often used to solve the problem of wheel pressure. When the number of wheels exceeds four, an articulated balanced frame must be used.
1.4.2 Matching of wheel tread and rail
Double flange, single flange, no flange wheel tread shape, and size match with the rail as shown in the following figure and the following table.
crane wheels matching rails
| B≥ | 90/ 95 | 95/ 100 | 100 /105 | 110/ 110 | 120/ 120 | 135/ 145 | 135/ 145 | 135/ 145 | 140/ 150 | 140/ 150 | 135/ 145 | 155 /160 | 185/ 190 | 205/ 210 |
| B2 | 32.1 | 38.1 | 42.8 | 50.8 | 60.33 | 68 | 70 | 70 | 73 | 75 | 70 | 80 | 100 | 120 |
| C≥ | 7.5/9.5 | 7.5/9.5 | 7.5/9.5 | 7.5/9.5 | 7.5/ 9.5 | 7.5/12.5 | 7.5/12.5 | 7.5/ 12.5 | 7.5/ 12.5 | 7.5/ 12.5 | 7.5/ 12.5 | 7.5/ 15 | 12.5/ 15 | 12.5/ 15 |
| b≥ | 20 | 20 | 20 | 20 | 20 | 25 | 25 | 25 | 25 | 25 | 25 | 25/30 | 25/30 | 25/30 |
| α | 6° | 6° | 6° | 6° | 6° | 6° | 6° | 6° | 6° | 6° | 10° | 10° | 10° | 10° |
| r≤ | 5 | 5 | 5 | 5 | 5 | 10 | 10 | 10 | 10 | 10 | 5 | 5 | 5 | 5 |
| r1 | 6.35 | 6.35 | 7.94 | 7.94 | 7.94 | 13 | 13 | 13 | 13 | 15 | 6 | 8 | 8 | 8 |
| Rail Kg/m | 9 | 12 | 15 | 22 | 30 | 38 | 43 | 50 | 60 | 75 | QU70 | QU80 | QU100 | QU120 |
| Note 1: The numerators of B and C values in the table are used for trolley wheels, and the denominators are used for large cartwheels. Note 2: 9kg/m, 12kg/m, 15kg/m, 22kg/m, and 30kg/m light rails are selected according to GB/T11264. Note 3: 38kg/m, 43kg/m, 50kg/m, 60kg/m, and 75kg/m hot-rolled rails are selected according to GB/T2585-2007. Note 4: The steel rails of QU70, QU80, QU100, and QU120 cranes are selected according to YB/T5055-1993. Note 5: Square steel can be used for the rail. When the top width of the square steel is B2, and the edge fillet is r1, for the wheel, B=B2+2(b+c), r=r1-2, r≥2 | ||||||||||||||
