Other

Sandvik Intellectual Property Ab

Sandvik Mining and Construction Oy

Sandvik Tamrock Oy

Tamrock Oy

Jaakko Niemi

Vesa Uitto

Pauli Lemmetty

Tapani Pöysti

Markku Keskiniva

Timo Muuttonen

Jouko Muona

Antti Koskimäki

Jukka Osara

Leo Hakkinen

Esa Rantala

Timo Kemppainen

Vesa Peltonen

Heikki Saha

Tapani P&ouml;ysti

Reijo R&auml;m&ouml;

In a hydraulic system for mining equipment and a method of adjusting the power of a rock drill machine, at least one mining actuator used for detaching rock is connected to a dedicated separate hydraulic circuit having a special hydraulic pump. The power of the mining actuator is adjusted by changing the hydraulic power generated by the separate hydraulic circuit of the hydraulic pump.

Hydraulic system for mining equipment and method of adjusting power of rock drill machine

A method and an equipment for controlling the operation of a rock drilling apparatus, which rock drilling apparatus comprises a percussion device for producing impact energy to a tool of the rock drilling apparatus, a rotating device for rotating the tool in a drill hole, a feeding device for feeding the tool in the drill hole and a flushing device for supplying flushing agent through the tool and the bit for flushing loose drilling waste from the hole. The feed force and the percussion power are determined and the relation between the feed force and the percussion power is adjusted to a targeted operation area within an upper and a lower limit.

Method and equipment for controlling operation of rock drilling apparatus

The invention concerns an arrangement for controlling a hydraulic rock drilling device. The arrangement includes a pressure ratio valve that is used for adjusting the relation between the pressures in the pressure channel leading to the percussion device and/or another actuator, such as a shank stabilizer, and the pressure channel leading to the feed mechanism. The pressure ratio valve is arranged to keep the relation between the pressures of the actuator and the feed mechanism constant over the normal drilling range.

Arrangement for controlling rock drilling

Arrangement for controlling boom for rock drilling unit

Arrangement in a hydraulically operated rock drilling equipment

Growing community of inventors

Tampere, Finland

Jaakko Niemi