Low-power radial welding bogie

Abstract

The invention provides a low-power radial welding bogie comprising two wheel sets, a three-piece side welding beam and a crossbeam. Two ends of the side beam are connected with the wheel sets through primary rubber-metal pads and bearing saddles respectively. The wheel sets are connected with a wheel set connecting device through the bearing saddles. A crossbeam assembly is connected with the side beam through two secondary suspension systems. A foundation brake gear is suspended on the crossbeam assembly or the side beam. The secondary suspension systems have multiple structural styles, and the wheel sets are of variable- gauge structures. Compared with conventional freight car bogies, the low-power radial welding bogie has the advantages that the bogie is good in uniform load performance; defects of cast structure swing bolsters and side frame casting are avoided; wheeltrack acting force is reduced, and wear parts of the suspension systems are reduced; the variable-gauge wheel sets meet requirements on variable-gauge performance of the bogie; high-speed operation stability of the bogie is improved, and rim wear generated when the bogie passes curves is reduced; the bogie can meet the requirements on maximum axle load of 30t and highest running speed of 200km/h.

Description

technical field [0001] The invention relates to a railway freight car bogie, in particular to a low power radial welded bogie. Background technique [0002] The bogie supports the car body, guides the vehicle to run along the track, and bears various loads from the car body and the line. At present, most of the domestic truck bogies adopt the three-piece casting structure, including a bolster, two side frames, The two wheel sets, spring damping device and brake device have the following problems: 1) The bolster and side frame adopt casting structure, which is heavy, which is not conducive to the lightweight design of the bogie; 2) Most of the secondary suspension system The oblique wedge type vibration damping is adopted, and there are many wear parts of the bogie; 3) Due to its own structural characteristics, its primary three-way stiffness is often designed to a relatively large value, so that the positioning stiffness of the bogie wheel pair is too large, which may easily...

AI Technical Summary

Problems solved by technology

[0002] The bogie supports the car body, guides the vehicle to run along the track, and bears various loads from the car body and the line. At present, most of the domestic truck bogies adopt the three-piece casting structure, including a bolster, two side frames, The two wheel sets, spring damping device and brake device have the following problems: 1) The bolster and side frame adopt casting structure, which is heavy, which is not conducive to the lightweight design of the bogie; 2) Most of the secondary suspension system The oblique wedge type vibration damping is adopted, and there are many wear parts of the bogie; 3) Due to its own structural characteristics, its primary three-way stiffness is often designed to a relatively large value, so that the positioning stiffness of the bogie wheel pair is too large, which may easily cause the wheel 4) Due to the large vertical stiffness of the primary series, it does not have real low dynamic characteristics; 5) Since the axial relative displacement cannot occur between the wheels and axles, it cannot adapt to the variable gauge performance of the bogie; 6) Due to the small anti-diamond stiffness and large unsprung mass of the traditional three-piece bogie, the critical speed of the bogie is low, and the damage to the line is large, and its running speed will not exceed 120km / h

[0003] Patent Publication No. 103010247A discloses a series of three-piece bogies with a figure-eight rubber pad structure. The front and rear wheel pairs are connected through the side frames acting on the figure-eight rubber pads. In order to ensure sufficient stability of the wheel sets, therefore The rubber pad must have a sufficiently large three-way stiffness value, thereby affecting the self-guiding function of the wheelset and the low dynamic performance of the bogie; the patent announcement number CN2905578Y discloses a three-piece self-guiding bogie, which adopts the traditional Sheffield self-guiding mechanism, its radial mechanism connects the front and rear wheel sets through the bearing saddle, and a rubber pad structure is used between the bearing saddle and the self-guiding mechanism. This structural design can effectively avoid wheel rim wear, but due to its self-guiding The guide mechanism realizes the connection of the front and rear wheel sets through rubber pads and bearing saddles, which cannot meet the stability requirements of high-speed operation with a speed greater than 120km / h

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