The drawing shows a BEKAwind PRO central lubrication for 3 blade bearings with each 6 lub points.

The lubrication system consists of

• an electric piston pump EP-1R
• a main distributor which is monitored by a proximity switch
• 3 progressive distributors with 6 outlets
• and the necessary fittings.

The lubrication system is controlled by the central controller of the wind converter. The lubricating pump is operated as long as the main distributor has passed the necessary number of cycles. The number of cycles and the monitoring of the distributor is made by a proximity switch which is integrated at the main distributor.

The device is protected by a pressure relief valve with return flow to the reservoir. The lubricant level in the reservoir is monitored by a level switch.

As an option, the distributors can be equipped with blocking control to ensure the function of the lubrication system even if a lub point is blocked.

Electric piston pump EP-1R

The electric piston pump EP-1R was designed especially for the operation in wind converters.

Caused by follower piston in the reservoir, the pump can be installed in each position. If the pump is installed in rotating parts like the rotor, the follower piston should be supported by the centrifugal force.

The pump element with desmodromic drive and the agitator in the reservoir guarantee an ideal suction performance even under difficult circumstances.

Technical data

Reservoir capacity:  4 / 8 / 20 kg
Operating pressure:  max. 280 bar
Pressure connection:  6 mm
Lubricant:  grease up to NLGI cl. 2
Delivery rate:  120 mm³/rev.
Position of installation:  each
Operating temperature:  -20°C to +60°C
Level switch:  change-over contact
Switching current:   1A - 60A
Voltage:  12V DC,  24V DC, 115V AC, and 230V AC

Progressive distributor MX-F

The progressive distributors from the MX-F series are designed in a modular kind. The distributor can be adapted easily according to the requirements like number of lub points or delivery rate. Each distributor consists of an initial element (without piston), 2 to 11 middle elements and an end element (each with piston).

The delivery rate of each distributor disk is determined by the diameter of the piston.

Each MX-F distributor needs at least 3 middle elements for correct function. Each middle element has 2 outlets, which can also be connected or closed.

Flexible, precise, modular:
The BEKA progressive distributors

• Modular design for individual adaptation of the distributor
• Suitable as main or secondary distributor
• Modifications always possible
• Number of outlets and feed rates can be changed

Operating pressure:  max. 300 bar
Temperature range:  -35°C to +70°C
Lubricant:  grease up to NLGI 2

Monitoring of the distributor

Progressive distributors have an hydraulic sequence control. The pistons of the distributor are regulated by the incoming lubricant in an inevitable and consecutive way.

If there is a disturbance in the flow, e.g. if a lub point or a line is choked, the whole distributor stops working. The pressure relief valve leads the lubricant back to the reservoir.

For the monitoring of the whole system or for the cycle control, the distributors can be equipped with a proximity switch.

Technical data of the proximity switch

Connection:  M12x1 plug-in
Switching:  PNP NO contact
Load capacity:  200 mA
Voltage:  10-60 V DC
Operating temperature:  -40°C to +85°C
Function indicator:  LED yellow
Housing material:  special steel
Protective system:  IP 67

Safety with blocking control

BEKAwind progressive distributors can be equipped optionally with blocking control.

If a lub point is blocked, a progressive distributor without blocking control stops working because of its sequential control.

The blocking control indicates the malfunction optically and allows the distributor to continue working.