Qingzhou Qiannuo Machinery Co., Ltd.

Contact: Manager Zhang

Fax: 0536-3579821

Phone: 151-6946-3938

Postcode: 262515

Address: Qingzhou Economic Development Zone, Shandong

# Calculation of spiral blades

Spiral blades have been widely used in the industrial production process, but because the blades have a spiral shape, measurement before purchase has become a difficult problem that cannot be solved. For this reason, I will summarize them, and I will teach you the following. Calculation:

Common formula one,

Under the conditions of known spiral diameter D and spiral shaft diameter d pitch t, the size of the blank can be determined according to the following formula:

d1 = d2 + (t / π) 2

D1 = d1 + （Dd）

Common formula two,

1. Lead of spiral blade: S = (πd) 2 + t2

2. The diameter of the expanded inner hole: d1 = 1 / π (πd) 2 + t2

3. Expanded outer diameter dimension: D1 = d1 + (Dd)

Triangle method

Think of the helix as a right-angled triangle wound cylinder with two right-angled edges equal to the pitch t and the circumferential length of the circular cross section of the cylinder πd or πD, respectively. Then the hypotenuse forms a spiral l or L with a pitch equal to the known pitch t.

l = （πd） 2 + t2 L = （πD） 2 + t2

Then according to the arc length equal to the radius multiplied by the included angle formula, each size of the round blank of the blade can be derived separately

b = (Dd) / 2

d1 = 2bl / (Ll)

D1 = 2bL / (Ll)

α = （πD1-L） * 360 ° / πD1

D: cylinder piston diameter.

L: Cylinder piston formation length.

l: Stem stroke length.

S: The lock cylinder has a good area.

F: Air cushion force.

P: Gas pressure for latching valve.

The spiral blade is the basic component of the spiral and is formed by stamping. There are many calculation methods for the blade. Different calculation methods have different characteristics, but there are certain errors, but they will not cause much difference. We can pass These methods perform calculations.

Editor: mxy