The triangular throttle valve bending deformation equation is such that the fixed end of the throttle plate has a width b and the width of the free end is a, wherein b=2a, and the total length of the triangular valve piece (ie, the height of the triangle) is 1. For the triangular section The bending deformation of the flow valve piece is analyzed and calculated, with the center of the fixed end as the origin, the vertical line of the fixed end line as the x-axis, and the edge of the fixed end as the y-axis, and a rectangular coordinate system is established, as shown.
Using the triangle shape to approximate the following relationship: bxb = l-xl, get: bx = (l-x) bl (1) The torque at any position x is the force of the x throttle valve on the right side of the x position Torque, the force is the product of the area of ​​the triangle on the right side of x and the pressure load q of the uniform surface. The point of action of the force is the center of gravity cx of the triangle, ie: Fl-x=bx2(l-x)q(2) Cx=l-x3(3) The moment at any position x is the moment of the force on the x-th throttle plate to the x position, ie Mx=Fl-xcx(4) brings (2)(3) (4) The moment Mx of the triangular throttle plate at the x position is: Mx=qb(l-x) 36l (5) at x, the cross-sectional width of the throttle plate is bx, and the thickness is h, then at x The moment of inertia I(x) is: I(x)=(l-x)bh312l(6) When the triangular throttle plate is subjected to the uniform load q, the throttle plate will be bent and deformed at different positions. The amount of bending deformation at x is different, so the throttle plate will be bent into a curved surface, and a bending deformation curve is formed on the center line.
When the gas spring opens before the valve is opened, when the bypass valve is not opened, no oil flows through the bypass valve, and the oil passes through the oil and gas spring. The constant flow orifice of the oil spring remains unchanged, but the flow rate changes. The damping ratio has also changed and the corresponding valve opening speed has also changed.
Conclusion Through the analysis of the bending deformation of the triangular throttle plate, it can be seen that: (1) the triangular throttle valve has the greatest bending stiffness compared with other shape type throttle plates, that is, under the same pressure, the triangle The amount of bending deformation of the throttle plate piece and the amount of bending deformation of the trapezoidal and rectangular throttle plate pieces are small. When the bypass valve is opened, the valve opening speed of the oil and gas spring is related to the damping ratio of the designed oil and gas spring. The flow rate of the bypass valve affects the damping characteristics of the oil and gas spring. Therefore, the design and control of the flow of the bypass valve can be realized. Design and control of the damping characteristics of the adjustable oil and gas spring.
(2) When considering the back pressure of the oil-air spring chamber, the gas chamber of the oil-air spring is equivalent to a spring. Therefore, the pressure difference of the air chamber will change with the position of the oil-oil spring. When the oil-gas spring moves according to a certain motion law. At the same time, the pressure difference of the air chamber will also vary with the speed of the oil and gas spring. According to the relationship between the pressure difference of the air chamber and the position, the resistance analysis of the oil and gas spring can be simulated and analyzed with the change of position and speed.
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