Brazil CONBOR brake

Brazil CONBOR brake

The Brazilian CONBOR pneumatic brake assembly is specifically developed for heavy-duty coupling and braking applications in heavy equipment.
In high-inertia or continuous slipping conditions, this is critical, as the generated heat usually reduces the efficiency of pneumatic components and shortens their service life. The contraction effect, combined with the open structure of the friction seat, allows cooling air to pass through and rapidly dissipate heat from the friction surfaces. The wide series (L) not only includes the same features as the narrow series (E), but also provides greater torque capacity for the same diameter due to the increased width; this makes it particularly suitable for applications with diameter constraints.

CONBOR pneumatic brake operating principle:
The expansion chamber of the pneumatic brake is the main movable part of the pneumatic brake assembly. Air uniformly fills the expansion chamber, pressing the shoes against the drum surface. In addition to acting as an air cushion that absorbs various shocks and minor misalignments, the expandable chamber automatically compensates for wear on the lining and drum, eliminating the need for manual wear adjustment up to the limit specified in Table 1. Centrifugal force and springs ensure complete retraction of the friction shoes from the drum once the air is exhausted. **The recommended pressure is 10 kg/cm². The IV-E series drums (nominal size) have diameters ranging from 8" to 42", and the IV-L series has diameters ranging from 14" to 46" (available in both single and dual versions, with either single or multiple connections).

CONBOR component adjustment

Pneumatic components are self-adjusting and do not require adjustment because they automatically compensate for lining and/or drum wear.

CONBOR air piping

The torque generated by the component is proportional to the applied pressure. Therefore, limiting the pressure also limits the torque, allowing it to function as an overload protector. Consequently, the use of a pressure regulating valve located between the air supply source and the component is essential; if the intake is connected to a main line, or in cases of secondary air supply or cyclic operation, a reservoir should be used and positioned as close to the component as possible. A typical installation is shown in Figure A, illustrating the position of the pressure regulating valve.

Tubes must be free of foreign matter such as gaskets, metal chips, etc. The ends of cut tubes should be deburred to avoid reduction of the effective tube diameter. It is very important to select correctly sized pipes and valves for cyclic applications. Undersized tubes can cause slow response and may also accelerate lining wear due to increased friction. General rules for tube selection are as follows. For systems supplying clutches and pneumatic rubber chamber brakes, air lubricators are not recommended; however, if air lubricators are used, they must be non-adjustable mist types.

Brazilian CONBOR brake installation steps:

1 Position the chamber, aligning the inlet valve with the flange groove;
2 Insert a cylindrical rod (machined and burr-free) between the chamber and the flange (near the valve), and press the valve inward;
3 Push the chamber evenly into the flange until the valve enters the groove;
4 Use a suitable tool to install all elastic rings into the chamber valve;
5 Replace the shoes (equipped with torque arms and springs) according to previously made marks;
6 Position the cover, aligning it with the flange marks, and install the torque arm into the hole on the cover.
7 Replace the bolts, using new lock washers or "parlock" nuts, and tighten with uniform torque.