Throttle Valve Throttling Characteristic Model Analysis

Abstract

This study focuses on the application of wedge throttle valve in pressure control device system. The wedge throttle valve controls the positive output of the hydraulic motor through the solenoid valve, drives the worm gear and worm mechanism to realize the reciprocating movement of the valve core, so as to fine-adjust the opening of the throttle valve, and first control the pressure drop through the valve to maintain the pressure balance. This paper first introduces the basic working principle of throttle valve, and deduces the process of fluid energy conversion in throttle device based on Bernoulli principle. The relationship between the pressure head change and the flow coefficient of the fluid before and after the throttle valve is discussed in detail, the theoretical flow problem of the throttle valve is put forward, and the flow formula in practical application is modified according to the fluid difficulty. In this paper, the flow area of the throttle valve is analyzed in detail, the relationship between the valve core and the opening of the throttle valve area is expounded, and the calculation method between the flow area and the aperture is derived by simplifying the model. According to the dynamic changes of fluid density, flow rate and orifice shape in actual engineering, the study shows that throttle valve plays a vital role in the process of liquid flow in the device, and can effectively control the wellhead back pressure by adjusting the opening and flow area to ensure the safety and efficiency of the operation.