JPH0224170U

JPH0224170U -

Info

Publication number: JPH0224170U
Application number: JP10189988U
Authority: JP
Priority date: 1988-07-30
Filing date: 1988-07-30
Publication date: 1990-02-16

Description

[Brief explanation of the drawing]

第１図は本考案圧力調整弁の水平断面図、第２
図は同圧力調整弁におけるボールバルブ径とオリ
フイス内径との比の違いによる流体流量に対する
調整圧力の変化を示す図、第３図は本考案圧力調
整弁を備えたデイーゼルエンジンの燃料系統を示
す図、第４図は従来の圧力調整弁の水平断面図、
第５図は同要部の拡大図で、上半分は製作当初の
もの、また下半分はバルブシート構成部材の通孔
のバルブシート部が摩耗した後を示す。第６図は
従来の圧力調整弁の流体流量に対する調整圧力の
変化を示す図、第７図は本考案圧力調整弁の考案
過程で生じた案を示す要部縦断面図である。１；バルブボデイ、１ｂ；内孔、２０；バルブ
シート構成部材、２０ａ；円筒状通孔、２０ｂ；
バルブシート部、２０ｄ；オリフイス、３；ボー
ルバルブ、４；ばね。 Figure 1 is a horizontal sectional view of the pressure regulating valve of the present invention;
The figure shows the change in regulating pressure with respect to the fluid flow rate due to the difference in the ratio between the ball valve diameter and the orifice inner diameter in the same pressure regulating valve. Figure 3 shows the fuel system of a diesel engine equipped with the pressure regulating valve of the present invention. , Figure 4 is a horizontal sectional view of a conventional pressure regulating valve.
FIG. 5 is an enlarged view of the same essential parts, with the upper half showing the state at the time of manufacture, and the lower half showing the state after the valve seat portion of the through hole of the valve seat component has been worn. FIG. 6 is a diagram showing changes in the regulating pressure with respect to the fluid flow rate of a conventional pressure regulating valve, and FIG. 7 is a longitudinal cross-sectional view of a main part showing a proposal that occurred during the design process of the pressure regulating valve of the present invention. 1; Valve body, 1b; Inner hole, 20; Valve seat component, 20a; Cylindrical through hole, 20b;
Valve seat portion, 20d; orifice, 3; ball valve, 4; spring.

Claims

[Scope of utility model registration request]

In the pressure regulating valve, a ball valve is pressed and seated by a spring on a valve seat portion provided at the outlet of the hole of a valve seat component forming a cylindrical through hole into which a pressure-regulated fluid flows, the valve seat component A pressure regulating valve characterized in that an orifice having an inner diameter of 20 to 50% of the diameter of the ball valve is provided on the inlet side of the cylindrical through hole.