GB/T 36520.1-2018Hydraulic fluid power—Dimensions and tolerances of polyurethane seals—Part 1: Dimensions and tolerances of seals used in hydraulic reciprocating applications for piston (English PDF)

Foreword

GB/T 36520 "Hydraulic transmission polyurethane seal size series" is divided into 4 parts.

--- Part 1. Dimensions and tolerances of piston reciprocating seals;

---Part 2. Dimensions and tolerances of piston rod reciprocating seals;

---Part 3. Dimensions and tolerances of the dust seal;

--- Part 4. Dimensions and tolerances of cylinder seals.

This part is the first part of GB/T 36520.

This part is drafted in accordance with the rules given in GB/T 1.1-2009.

1 Scope

This part of GB/T 36520 specifies the terms and definitions, symbols and knots of piston reciprocating polyurethane seals in hydraulic drive systems. Configuration, size and tolerance, identification.

This section applies to piston reciprocating polyurethane seals in hydraulic cylinders.

2 Normative references

The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this document. For undated references, the latest edition (including all amendments) applies to this document.

GB/T 17446 Fluid Transmission System and Component Vocabulary

3 Terms and definitions

The terms and definitions defined in GB/T 17446 apply to this document.

4 Symbol

The following symbols apply to this document.

U---Piston reciprocating polyurethane monomer U-shaped seal code, referred to as single U-ring seal

Y×D---Piston reciprocating polyurethane monomer Y×D sealing ring code, referred to as monomer Y×D sealing ring

G---Piston reciprocating polyurethane monomer drum ring code, referred to as single drum ring

SH---Piston reciprocating polyurethane single mountain ring code, referred to as single mountain ring

GZ---Piston reciprocating polyurethane combination drum ring code, referred to as combination drum ring

D---Hydraulic cylinder bore

d---sealing groove inner diameter

L---sealing groove axial length

L0---T-slot length

D1---polyurethane seal outer diameter

D0---polyurethane seal ring root diameter

D1---Rubber elastic ring inner diameter

H---polyurethane sealing ring height

t---plastic support ring thickness

h---single mountain ring seal lip height

S1---The cross-sectional width of the single polyurethane sealing ring or the total width of the combined polyurethane sealing ring