GB/T 28279.1-2012Plain bearing -- Hydrostatic plain journal bearings with drainage grooves under steady-state conditions -- Part 1: Calculation of oil-lubricated plain journal bearings with drainage grooves (English PDF)

1 Scope

Oil lubrication hydrostatic radial part of the GB/T 28279 for sump back sliding bearing calculations.

This section applies to a hydrostatic radial bearing under steady-state conditions.

This section is only between the oil chamber back to the oil sump lubrication. Compared with no back to the sump of the hydrostatic radial sliding bearings, in phase

Stiffness under the same circumstances, back sump lubrication pump requires more power.

2 Normative references

The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein

Member. For undated references, the latest edition (including any amendments) applies to this document.

GB/T 28279.2-2012 Plain bearings back under steady-state conditions sump the hydrostatic radial bearings - Part 2. back

Sump oil lubrication Radial Bearing calculated using characteristic values (ISO 12167-2.2001, IDT).

ISO 3448.1992 Industrial liquid lubricants ISO viscosity classification (Industrialliquidlubricants-ISO viscosityclas- sification)

The basic principle and boundary conditions calculated 3

Etc. This part of the purpose of the calculation is to determine the precise bearing hydrostatic bearing operating parameters and operating conditions, the geometry and lubricants

Functional relationship. That is determined bearing eccentricity, bearing capacity, oil film rigidity, oil pressure, oil flow, friction power, pump power and

Many parameters temperature rise. In addition to considering the hydrostatic bearing, the hydrodynamic bearing effect also made approximations.

Reynolds equation for the hydrostatic bearing calculation provides a theoretical basis. However, in most practical applications, it can be approximated by

In order to achieve the desired accuracy.

Approximation method used in this section are two integral equations to describe the state of the lubricating oil flowing through the bearing and journal surface of the gap.

Both integral equation can be derived from the Reynolds equation using specific boundary conditions. Hagen - Park Bernoulli equation describes the parallel surface gap

Pressure flow, Kurt formula described by the rotation of the journal bearing gap generated shear flow. Appendix A contains a calculation and theoretical

Based on a detailed description.

Calculation process described in this section is used in the following key assumptions.

a) the lubricant flow is laminar.

b) lubricants fully adhered to the surface to be lubricated.

c) lubricating oil is incompressible Newtonian fluid.

d) throughout the lubrication gap and pre-restrictor lubricating oil viscosity, etc. are.

e) completely filled with lubricant in the lubrication gap.

f) film thickness direction of the pressure gradient is zero.

g) journal and the pad surface constituting the lubricating gap is rigid.

GB/T 37677 | GB/T 35088 | GB/T 35087 | GB/T 28281 | GB/T 28278.2 | GB/T 28278.1 | […]