Damping device

Abstract

A damping device, including: a wedge assembly having a wedge including a vertical surface and an inclined surface; a primary friction board disposed on the vertical surface; and a secondary friction board disposed on the inclined surface; and a damping spring assembly disposed underneath the wedge assembly. The wedge assembly has the following structure parameters: α=16-30°, and μ<tgα<μ+μ 1 , where α represents an included angle between a friction surface of the secondary friction board and a vertical plane, μ represents a friction coefficient of the primary friction board, and μ 1 represents a friction coefficient of the secondary friction board.

1 . A damping device, comprising:
 a) a wedge assembly ( 1 ) comprising a wedge ( 1   b ) comprising a vertical surface and an inclined surface; a primary friction board ( 1   a ) disposed on the vertical surface; and a secondary friction board ( 1   c ) disposed on the inclined surface; and   b) a damping spring assembly ( 2 ) disposed underneath the wedge assembly ( 1 );   
       wherein
 in the wedge assembly ( 1 ), α=16-30°, and μ<tgα<μ+μ 1 , where α represents an included angle between a friction surface of the secondary friction board ( 1   c ) and a vertical plane, μ represents a friction coefficient of the primary friction board ( 1   a ), and μ 1  represents a friction coefficient of the secondary friction board ( 1   c ). 
 
     
     
         2 . The damping device of  claim 1 , wherein a width of the wedge assembly ( 1 ) is L=200-260 mm 
     
     
         3 . The damping device of  claim 1 , wherein a mechanical property of the damping spring assembly ( 2 ) meets the following formula: K 1 ×ctgα=K×C/2μ, in which K 1  represents a rigidity of the damping spring assembly ( 2 ), K represents a total rigidity of a spring suspension device, and C represents a relative friction coefficient of the wheel truck of a railroad freight car and ranges from 0.05 to 0.15. 
     
     
         4 . The damping device of  claim 2 , wherein a mechanical property of the damping spring assembly ( 2 ) meets the following formula: K 1 ×ctgα=K×C/2μ, in which K 1  represents a rigidity of the damping spring assembly ( 2 ), K represents a total rigidity of a spring suspension device, and C represents a relative friction coefficient of the wheel truck of a railroad freight car and ranges from 0.05 to 0.15. 
     
     
         5 . The damping device of  claim 1 , wherein the secondary friction board ( 1   c ) is in connection with the inclined surface of the wedge ( 1   b ) via a spherical structure comprising a convex surface and a corresponding concave surface. 
     
     
         6 . The damping device of  claim 2 , wherein the secondary friction board ( 1   c ) is in connection with the inclined surface of the wedge ( 1   b ) via a spherical structure comprising a convex surface and a corresponding concave surface. 
     
     
         7 . The damping device of  claim 3 , wherein the secondary friction board ( 1   c ) is in connection with the inclined surface of the wedge ( 1   b ) via a spherical structure comprising a convex surface and a corresponding concave surface. 
     
     
         8 . The damping device of  claim 4 , wherein the secondary friction board ( 1   c ) is in connection with the inclined surface of the wedge ( 1   b ) via a spherical structure comprising a convex surface and a corresponding concave surface. 
     
     
         9 . The damping device of  claim 5 , wherein two secondary friction boards ( 1   c ) are symmetrically disposed on the inclined surface of the wedge ( 1   b ). 
     
     
         10 . The damping device of  claim 6 , wherein two secondary friction boards ( 1   c ) are symmetrically disposed on the inclined surface of the wedge ( 1   b ). 
     
     
         11 . The damping device of  claim 7 , wherein two secondary friction boards ( 1   c ) are symmetrically disposed on the inclined surface of the wedge ( 1   b ). 
     
     
         12 . The damping device of  claim 8 , wherein two secondary friction boards ( 1   c ) are symmetrically disposed on the inclined surface of the wedge ( 1   b ). 
     
     
         13 . The damping device of  claim 1 , wherein
 the wedge ( 1   b ) is made of steel or iron;   the primary friction board ( 1   a ) is made of polymer materials; and   the secondary friction board ( 1   c ) is made of modified nylon materials.   
     
     
         14 . The damping device of  claim 2 , wherein
 the wedge ( 1   b ) is made of steel or iron;   the primary friction board ( 1   a ) is made of polymer materials; and   the secondary friction board ( 1   c ) is made of modified nylon materials.   
     
     
         15 . The damping device of  claim 3 , wherein
 the wedge ( 1   b ) is made of steel or iron;   the primary friction board ( 1   a ) is made of polymer materials; and   the secondary friction board ( 1   c ) is made of modified nylon materials.   
     
     
         16 . The damping device of  claim 4 , wherein
 the wedge ( 1   b ) is made of steel or iron;   the primary friction board ( 1   a ) is made of polymer materials; and   the secondary friction board ( 1   c ) is made of modified nylon materials.   
     
     
         17 . The damping device of  claim 5 , wherein
 the wedge ( 1   b ) is made of steel or iron;   the primary friction board ( 1   a ) is made of polymer materials; and   the secondary friction board ( 1   c ) is made of modified nylon materials.   
     
     
         18 . The damping device of  claim 6 , wherein
 the wedge ( 1   b ) is made of steel or iron;   the primary friction board ( 1   a ) is made of polymer materials; and   the secondary friction board ( 1   c ) is made of modified nylon materials.