SEVENCRANE solves the problem of bridge crane/overhead crane rail gnawing for customers

First, due to manufacturing errors, uneven wear and tear, and unilateral replacement during maintenance, the diameters of wheels on both sides are unequal. When running at the same speed, the journeys on both sides are unequal, and the side with large diameters will advance gradually, resulting in asynchrony, which causes the body to skew and gnaw the rails. Second, the installation position of the four wheels is not at the four corners of the rectangle, and the center of the wheels on the same side is not in a straight line, which forms the deflection of the centerline of the wheels and causes rail gnawing.

First, because the track laying is not standard, the horizontal bending is too large and the straightness error is more than 2 mm, which results in the gnawing of the fixed track segment.

Second, the track gauge is too large, the outer wheel edge gnaws the rail; conversely, the inner wheel edge gnaws the rail.

Thirdly, the vertical height difference between the treads on the same section of the two tracks is more than 15 mm, which causes the sideslip of the cart and rails gnawing.

Fourth, the parallelism of the two tracks is excessive, forming an "eight-character" or trumpet-shaped, causing rail gnawing.

Fifth, the track foundation is not solid, and when loaded, it will sink, resulting in rail gnawing.

First, the deformations of the bridge frame cause the horizontal bending of the end beam. When the diagonal length exceeds 5 mm or more, it causes the span to exceed the difference. If it is positive, it gnaws the inner rim of the wheel; on the contrary, it gnaws the outer rim of the wheel.

Secondly, the horizontal bending of the end beam causes the wheel to deviate horizontally, so that the centerline of the wheel and the centerline of the track are not in a straight line, forming the same deviation and causing rail gnawing.

Thirdly, the vertical deflection of the bridge frame causes the vertical deflection of the wheel, which causes the angle between the tread centerline and the vertical line, changes the rolling radius of the wheel. After loading, the vertical deflection of one side of the wheel increases gradually, while the vertical deflection of the other side decreases, resulting in different rolling radius, resulting in rail gnawing.