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Novel hollow sodium-filled valve

A valve and hollow technology, applied in the direction of valve devices, machines/engines, mechanical equipment, etc., can solve problems such as many processes, low material utilization rate, difficult temperature and quality control, etc., achieve simple forming process, improve cooling effect, and realize lightweight effect

Active Publication Date: 2015-07-22
HUAI JI DENG YUE VALVE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the inner cavity of the valve has increased, the material utilization rate of this process is low, and there are many processes, which are prone to stress concentration, and the forming process of the preformed blank of the valve using the electric upsetting process is free deformation, and the temperature and quality are difficult to control.

Method used

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Examples

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Embodiment Construction

[0021] see figure 1 , which is a structural schematic diagram of the novel hollow sodium-filled valve described in the present invention.

[0022] A novel hollow sodium-filled valve 10 of the present invention includes a valve housing 11 and a solid rod portion 12; the valve housing 11 is preformed by cross-wedge rolling from a steel pipe material, and the head of the preformed blank is friction welded and sealed. , and then integrally formed by a die forging process, which includes an integrally formed trumpet-shaped hollow disc portion 11a and a hollow rod portion 11b; one end of the hollow rod portion 11b is welded to the solid rod portion 12, and the solid rod portion 12 The diameter of the cross section is the same as the outer diameter of the cross section of the hollow rod part 11b; the disc end face of the hollow disc part 11a is airtight, and forms an inner cavity with the hollow rod part 11b and the solid rod part 12; the inner cavity is filled There is metallic sod...

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PUM

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Abstract

The invention discloses a novel hollow sodium-filled valve. The novel hollow sodium-filled valve comprises a valve shell and a solid rod part. The forming method of the valve shell comprises the steps that cross wedge rolling is performed on a steel pipe material for preforming; friction welding sealing is performed on the head of a preformed billet; afterwards, a die forging forming technology is performed, so the valve shell is integrally formed. The valve shell comprises a flared hollow disc part and a hollow rod part which are integrally formed. One end of the hollow rod part is welded to the solid rod part through friction welding, and the diameter of the cross section of the solid rod part is equal to the outer diameter of the cross section of the hollow rod part. The disc end face of the hollow disc part is airtight, and an inner cavity is defined by the disc end face of the hollow disc part, the hollow rod part and the solid rod part and is filled with sodium. The novel hollow sodium-filled valve is convenient to form, capable of saving materials and good in heat dissipation performance.

Description

technical field [0001] The invention belongs to an engine valve of an internal combustion engine, in particular to a novel hollow sodium-filled valve. Background technique [0002] The valve is a precision part that seals the combustion chamber and controls the gas exchange of the internal combustion engine during the working process of the internal combustion engine. It is a key component to ensure the power performance, reliability and durability of the internal combustion engine. The intake valve mainly bears the mechanical load of repeated impact, and its working temperature is 300-400°C, while the exhaust valve is not only subjected to the mechanical load of impact, but also is subject to corrosion of high-temperature oxidizing gas, thermal stress, cone heat hoop stress and Due to the combined effect of gas pressure during combustion, the working temperature of the exhaust valve reaches 600-800°C, and the exhaust valve is made of austenitic heat-resistant steel as a who...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01L3/20F01L3/14F01L3/04
Inventor 陈刚肖景胜罗华欢苏德涛张弢王宝雨刘晋平邱万奇林喜佳孙歌
Owner HUAI JI DENG YUE VALVE CO LTD
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