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Suzhou Zhaoneng Precision Spring Hardware Co., Ltd.

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Tel15262592017

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AddressNo. 161, Shilin Road, Suzhou High-tech Zone

Common symbols and units for springs

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Common symbols and units for springs

Release date2014-08-07 Author Click

Common symbols and units for springs

A - spring material cross-sectional area (mm2); equivalent bending stiffness (N / mm);

A - the cross-section of the material perpendicular to the axis of the side length (mm); coefficient

B - plate bending stiffness (N / mm); coefficient

B-height-to-diameter ratio; the length of the side-section material parallel to the axis of the spring (mm);

C - Coil ratio of coil spring; Diameter ratio of disc spring; Coefficient

D - Spring diameter (mm)

D1 - spring inner diameter (mm)

D2 - spring outer diameter (mm)

D - spring material diameter (mm)

E - spring modulus (MPa)

F - spring load (N)

F '- the stiffness of the spring

Fj - working limit load of the spring (N)

Fo - initial tensile force of the cylindrical tension spring (N)

Fr - the radial load of the spring (N)

Fr - the radial stiffness of the spring (N / mm)

Fs - test load of the spring (N)

F - deformation of the spring (mm)

Fj - deformation of the working limit load Fj (mm)

Fr - static deformation of the spring (mm)

Fs - deformation of the spring under test load Fs (mm); linear static deformation (mm)

Fo - the amount of deformation (mm) of the tensile spring corresponding to the local tension Fo; the amount of deformation of the diaphragm in the center (mm)

G - shear modulus of the material (MPa)

G - gravity acceleration, g = 9800 mm / s2

H - the work of the spring high (length) (mm)

Ho - spring free height (length) (mm)

Hs - spring test load under the high (length) (mm)

H - the height of the inner cone of the disc spring (mm)

I - moment of inertia (mm4)

Ip - Moment of inertia (mm4)

K - curvature coefficient; coefficient

Kt - temperature correction factor

- the density of the material (kg / mm3)

- the normal stress when the spring work (Mpa)

b - material tensile strength (Mpa)

j - material working limit stress (Mpa)

s - the tensile yield point of the material (Mpa)

- shear stress when the spring work (Mpa)

K - coefficient

L - the length of the spring material development (mm)

L-spring material effective working circle expansion length (mm); plate spring free chord length (mm)

M - bending moment (N mm)

M - the role of objects on the spring quality (kg)

Ms - mass of the spring (kg)

N - variable load cycles

N - the work of the spring laps

Nz - spring support the number of turns

N1 - the total number of springs

P '- the stiffness of the spring single-turn (N / mm)

R - the coil in the radius (mm)

R1 - inner radius of the coil (mm)

R2 - outer radius of the coil (mm)

R - damping coefficient

S - safety factor

Torque (N mm)

T'- Torsional rigidity (N mm / (o))

T - the spring of the moment

Tc - cable pitch (mm)

U - deformation energy (N mm); (N mm rad)

V - the volume of the spring (mm3)

V - the speed of the impact body (mm / s)

Zm - bending section coefficient (mm3)

Zt - torsional section coefficient (mm3)

- helix angle (o); coefficient

- the angle of the cable (o); the cone half angle (o);

- axial gap of the coil (mm)

r - radial clearance of the combined coil (mm)

- coefficient

- coefficient

- torsion angle of the unit length of the torsion bar (rad)

- coefficient

- Poisson ratio; length coefficient

- natural frequency of the spring (Hz)

Vr - spring subjected to variable load excitation frequency (Hz)

b - shear strength of the material (Mpa)

j - working limit shear stress of the spring (Mpa)

o - pulsating torsional fatigue limit of the material (Mpa)

s - material of the torsion yield point (Mpa)

-1 - the material of the symmetrical cyclic torsion fatigue limit (Mpa)

- the torsion deformation angle (o); (rad)


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