Valve disc profile structure of spherical regulating valve and design method for valve disc profile structure
A technology of regulating valve and wire structure, applied in the field of regulating valve, can solve the problems to be improved, and achieve the effects of reducing weight, improving vibration performance and flexible operation
Active Publication Date: 2016-11-09
DONGFANG TURBINE CO LTD
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Problems solved by technology
However, at present, the industry's understanding of the vibration mechanism of the spherical control valve disc needs to be improved.
Method used
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[0024] see figure 2 As shown, the present invention is a profile structure of a valve disc body of a spherical regulating valve, including a valve disc body 1, which has a spherical sealing surface, and has a valve seat body 2 on the spherical sealing surface of the valve disc body 1. With the matching point 12 for sealing, the spherical sealing surface of the valve disc body 1 cooperates and seals with the matching point 22 on the arc-shaped sealing surface of the valve seat body 2 through the matching point 12 thereon. In order to reduce the unstable swirl flow generated by the fluid at the bottom of the spherical sealing surface of the valve disc body 1 during operation, the lower part below the matching point 12 on the spherical sealing surface of the valve disc body 1 is a planar structure, that is, the spherical seal of the valve disc body 1 The bottom of the surface is a flat-bottomed structure.
[0025] Specifically, the outline profile of the spherical sealing surfa...
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The invention discloses a valve disc profile structure of a spherical regulating valve and a design method for the valve disc profile structure. The valve disc profile structure comprises a valve disc body, wherein the spherical sealing surface of the valve disc body is provided with match points which are sealed with a valve seat body in a matched manner; and the lower part below the match points of the sealing surface is of a planar structure. The design method comprises the steps that 1, design parameters are determined, and a curve with the radius of RD is drawn as the basic outline profile of the spherical sealing surface of the valve disc body; 2, sealing match points are separately determined on two sides of the basic outline profile; 3, the match points determined on the two sides of the basic outline profile are taken as initial points, and elongation lines which are tangent to the basic outline profile are separately drawn on the basic outline profile below the match points; and 4, a straight line is adopted to connect the bottom ends of the elongation lines drawn on the two sides, and excessive line segments are eradicated, so that the designed outline profile of the spherical sealing surface of the valve disc body mainly consists of an arc-shaped section profile, elongation section profiles and a straight line section profile from top to bottom.
Description
technical field [0001] The invention relates to a control valve, in particular to a valve disc profile structure of a spherical control valve and a design method for the valve disc profile structure. Background technique [0002] The regulating valve is arranged on the fluid passage, and is mainly composed of an actuator and a valve. It changes the fluid flow in the fluid passage by receiving the signal output by the regulating control unit and using power operation. It can be seen that the regulating valve has a great influence on the working performance and safety of the fluid system. Stable operation plays a vital role, especially in steam turbines with high temperature and high pressure fluids. [0003] The regulating valve on the steam turbine is not only the first station of the flow part, but also the executive part of the control system, and is one of the core equipment of the steam turbine unit. The control valve commonly used in steam turbines is a spherical contr...
Claims
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Login to View More IPC IPC(8): F16K1/36
CPCF16K1/36
Inventor 钟主海江生科范小平
Owner DONGFANG TURBINE CO LTD