Dowty retarder with piston overflowing inclined holes

A technology of deceleration top and piston, which is applied in the direction of railway car body parts, track brakes, transportation and packaging, etc. It can solve the problems of increasing the impact force of the return valve plate, large resistance work, and the inability to achieve a smooth and slow return, and achieve resistance work. Small, small impact, good pressure holding effect

Inactive Publication Date: 2013-06-12
哈尔滨铁路减速顶调速研究有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem that the flow hole of the existing deceleration top piston is a straight hole, resulting in relatively large resistance work, which increases the impact force on the return valve plate during the return stroke, and cannot realize a smooth and slow return stroke, the present invention further proposes a Deceleration top of the inclined hole

Method used

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  • Dowty retarder with piston overflowing inclined holes

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Effect test

specific Embodiment approach 1

[0007] Specific implementation mode one: combine figure 1 Describe this embodiment, a deceleration top with a piston flow slant hole described in this embodiment includes a sliding cylinder 1, a pressure valve seat 2, a speed regulating valve spring 3, a speed valve plate 4, a piston 5, and a return valve plate 6 , pressure valve rod 9, seal cover 10, pressure valve inner spring 14, pressure valve outer spring 15 and spring seat 16, the upper end of piston 5 is inserted in the opening of the lower end of sliding oil cylinder 1, pressure valve seat 2, pressure valve rod 9 Inserted in the upper end of the inner cavity of the piston 5 from top to bottom, and the upper end of the pressure valve seat 2 is located outside the upper end face of the piston 5, and the upper end face of the piston 5 is provided with an annular overflow gap 5-1, an annular overflow gap 5 The bottom surface of -1 is provided with a plurality of piston flow slant holes 5-2, the plurality of piston flow sla...

specific Embodiment approach 2

[0009] Specific implementation mode two: combination figure 1 To illustrate this embodiment, a first O-ring 11 is provided between the outer wall of the sealing cover 10 and the inner wall of the sliding cylinder 1 of a deceleration top with a piston flow slant hole in this embodiment.

[0010] The technical effect of this embodiment is: the first O-ring 11 enhances the sealing effect between the outer wall of the sealing cover 10 and the inner wall of the sliding cylinder 1 .

[0011] Other components and connections are the same as those in the first embodiment.

specific Embodiment approach 3

[0012] Specific implementation mode three: combination figure 1 Describe this embodiment, between the outer wall of the piston 5 and the inner wall of the sealing cover 10 of a deceleration top with a piston flow inclined hole described in this embodiment, a sealing ring 12 and a second sealing ring are arranged in sequence from top to bottom. O-ring 13.

[0013] The technical effect of this embodiment is: the sealing ring 12 and the second O-ring 13 enhance the sealing effect between the outer wall of the piston 5 and the inner wall of the sealing cover 10 .

[0014] Other components and connections are the same as those in the first embodiment.

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Abstract

The invention discloses a dowty retarder with piston overflowing inclined holes, relates to a dowty retarder, and particularly relates to a dowty retarder with piston overflowing inclined holes. The invention aims to solve the problems that the work of resistance is larger, the impact force to a return valve plate during returning is increased, and stable and slow returning cannot be realized because the piston overflowing hole of the dowty retarder is a straight hole in the prior art. According to the dowty retarder provided by the invention, the upper end of a piston is inserted into an opening in the lower end of a slide cylinder; the upper end face of the piston is provided with an annular overflowing gap; the bottom of the annular overflowing gap is provided with a plurality of piston overflowing inclined holes; the plurality of piston overflowing inclined holes and the annular overflowing gap form an overflowing channel; a speed valve plate is sleeved on the outer side wall at the upper end of a pressure valve seat; a seal cover is sleeved on the piston; a spring seat is arranged in an inner cavity of the piston; the upper end of a spring in a pressure valve is inserted into a groove in the lower end face of a pressure valve rod; the lower end of a spring in the pressure valve is sleeved on a boss at the upper end face of the spring seat; and the upper end of a spring outside the pressure valve is connected with the lower end face of the pressure valve rod. The dowty retarder with the piston overflowing inclined holes is used for railway transportation.

Description

technical field [0001] The invention relates to a deceleration top, in particular to a deceleration top with a piston flow-through oblique hole. Background technique [0002] With the development requirements of high-speed and heavy-duty railways at home and abroad, the speed-regulating equipment of high-load series deceleration jacks has been widely promoted and applied. The piston is one of the important components of the high-load retarder, which directly determines the braking performance of the high-load retarder. However, since the flow hole is a straight hole, when the vehicle speed is lower than the critical speed, a large hydraulic flow will be generated, resulting in a large resistance work. When the deceleration jack returns, the instantaneous hydraulic flow will cause great damage to the return valve plate. If there is a large impact force, the speed of the return journey will easily lead to the situation that the deceleration jack cannot keep up with the next w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B61K7/02
Inventor 陈立春曾祥荣胡东东刘帆滕亮陈峰高起波王晓蕾郭爽
Owner 哈尔滨铁路减速顶调速研究有限公司
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