Visual engineering MKX Manual do Utilizador descarregar pdf (Página 5)

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SKF MonoFlex system structure

Prelubrication, relubrication, and oil+air distributor system

SKF MonoFlex single-line centralized lubri-

cation systems with single-line distributors

generally consist of a lubrication unit, the

single-line distributors, and the lubrication

lines. The pressure regulating valve and

pressure relief valve required for the single-

line centralized lubrication system’s opera-

tion are integrated into the lubrication unit.

If pressure losses of greater than 10 bar

are expected in the single-line centralized

lubrication system, for example due to a

wide expansion of the system or due to the

viscosity of the lubricant (depending on the

ambient temperature), a pressure switch

should be mounted to monitor the system at

the end of the main line, if possible. If such a

switch is mounted in this location, there is

no need

for a pressure switch in the unit.

The pressure

switch monitors the required

pressure build-up during the lubrication

cycle.

The lubrication unit run time specified by

the control unit or machine control system

ensures pressure build-up in the single-line

centralized lubrication system. Pressure in

the main line must be relieved after the

lubrication unit is switched off in order to

ensure proper functioning of the single-line

distributors. This is performed by the pres-

sure relief valve integrated into the lubrica-

tion unit.

See the following illustrations for exam-

ples of single-line centralized lubrication

systems with prelubrication and relubrica-

tion distributors.

Prelubrication distributor system

Lubrication point

Distributor

Gear pump unit

Pressure

switch

Relubrication distributor system

Distributor

Gear pump unit

Pressure

switch

Lubrication point

Oil+air system

M10x1

M10x1

P

P

R

0.5 bar

30 bar

G

1

/4

M10x1

M10x1

Hydraulic layout 1

P P

R

0.5 bar

30 bar

G

1

/4

Hydraulic layout 2

P P

R

0.5 bar

30 bar

20 bar

G

1

/4

Hydraulic layout 3

Gear pump unit

Oil+air mixing

valve

5

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