What Is The Calculation Process For Rubber O-rings?

Rubber O-ring calculation formula:

d(groove inner diameter)=a(O-ring tensile rate: static seal 1.035) [d(O-ring inner diameter in free state)+dw (O-ring cross-sectional diameter in free state)]-dw (in free state) O-ring section diameter)

D(outer diameter of groove)=2dw(cross-sectional diameter of O-ring in free state) [1-β(O-ring compression rate 20%)]+d(inner diameter of groove)

The specific calculation is as follows: Oil inlet seat 0-ring

Step 1: Substitute the data into the formula to generate two equations

Equation 1 32.2=1.035(d+dw)-dw Equation 2 35=2dw(1-0.2)+32.2

The second step is to solve equation 2:

Solve for dw=1.75 (O-ring section diameter)

The third step is to substitute dw=1.75 into Equation 1: Solve for d=31.05 (inner diameter of O-ring)

Oil outlet bracket 0-ring

The first step: Substitute the data into the formula to generate two equations. Equation 1 31.4=1.035(d+dw)-dw Equation 2 35=2dw(1-0.2)+31.4

The second step is to solve equation 2:

Solve for dw=2.25 (O-ring section diameter)

The third step is to substitute dw=2.25 into Equation 1: Solve for d=30.26 (inner diameter of O-ring)

Calculation formula of oil pump efficiency:

Flow×pressure÷current÷voltage÷3.6 Example: 54×200÷2.82÷7÷3.6=15.4%

1. Shore hardness 60%%P5%%D;

2. Breaking strength>10MPa;

3. Elongation at break>150%;

4. Compression permanent deformation (70℃×72 hours) <20%;

5. Oil resistance and weight gain (when immersed in 93# gasoline with 20% methanol for 72 hours) <5%;

6. The appearance of the product is smooth and clean, without burrs and scars.