A cutter head includes a first member, a cutting bit, and a second member. The first member includes a first end and a second end and includes a first mass. The cutting bit is coupled to the first member proximate the second end. The cutting bit includes a cutting edge rotatable about the axis. The second member is rotatable about the axis and includes a second mass eccentrically positioned with respect to the axis. Rotation of the second mass causes the first member and the cutting bit to oscillate.

A cutter head includes a first member, a cutting bit, and a second member. The first member includes a first end and a second end and includes a first mass. The cutting bit is coupled to the first member proximate the second end. The cutting bit includes a cutting edge rotatable about the axis. The second member is rotatable about the axis and includes a second mass eccentrically positioned with respect to the axis. Rotation of the second mass causes the first member and the cutting bit to oscillate.

A reciprocating impact part non-concentric protruding shaft fixed bearing method, comprising: arranging an eccentric shaft section (12) and a power shaft section (11), arranging eccentric shaft section (12) bearings (8) on the section (12), arranging power shaft section bearings (5) on the section (11); arranging power shaft section bearing retaining rings (10) and eccentric shaft section bearing retaining rings (9) to block the bearings (5) and (8), respectively; arranging connecting rods (2) as separate snap-fitted crankshaft connecting rods or integrated sleeved crankshaft connecting rods, fitting the latter onto the bearing (8) arranging a base (1) arranging the bearings (5) thereon, such that they support the sections (11) and (12) arranging a power source component (3), such that it drives the section (11) to rotate and the section (11) drives the rods in reciprocating impact. Also provided is a non-concentric protruding shaft fixed bearing reciprocating impact part for implementing the method.

A reciprocating impact part non-concentric protruding shaft fixed bearing method, comprising: arranging an eccentric shaft section (12) and a power shaft section (11), arranging eccentric shaft section (12) bearings (8) on the section (12), arranging power shaft section bearings (5) on the section (11); arranging power shaft section bearing retaining rings (10) and eccentric shaft section bearing retaining rings (9) to block the bearings (5) and (8), respectively; arranging connecting rods (2) as separate snap-fitted crankshaft connecting rods or integrated sleeved crankshaft connecting rods, fitting the latter onto the bearing (8) arranging a base (1) arranging the bearings (5) thereon, such that they support the sections (11) and (12) arranging a power source component (3), such that it drives the section (11) to rotate and the section (11) drives the rods in reciprocating impact. Also provided is a non-concentric protruding shaft fixed bearing reciprocating impact part for implementing the method.

The self-propelled construction machine comprises a machine frame 2, supported by a chassis 1, which has wheels or tracks 1A, 1B. A milling drum 4 is arranged on the machine frame. The wheels or tracks and the milling drum are driven by a drive unit 8. A control unit 19 controls the drive unit 8 and a signal-receiving unit 18 detects at least one measurement variable M(t) which is characteristic of an operating state of the milling drum. The rotational speed of the milling drum is adapted, based on at least one measurement variable M(t), to the operating conditions of the construction machine in such a way that the milling drum is operated in a non-critical operating state. The adaptive open-loop control of the milling drum rotational speed allows the construction machine to be operated at an optimum operating point with respect to the milling drum rotational speed.

The self-propelled construction machine comprises a machine frame 2, supported by a chassis 1, which has wheels or tracks 1A, 1B. A milling drum 4 is arranged on the machine frame. The wheels or tracks and the milling drum are driven by a drive unit 8. A control unit 19 controls the drive unit 8 and a signal-receiving unit 18 detects at least one measurement variable M(t) which is characteristic of an operating state of the milling drum. The rotational speed of the milling drum is adapted, based on at least one measurement variable M(t), to the operating conditions of the construction machine in such a way that the milling drum is operated in a non-critical operating state. The adaptive open-loop control of the milling drum rotational speed allows the construction machine to be operated at an optimum operating point with respect to the milling drum rotational speed.

A cutting device for a cutting head includes a disc, a plurality of cutting elements secured to the disc, and a plurality of wear elements secured to the disc. The disc rotates about an axis of rotation, and the disc includes a peripheral edge. The cutting elements are spaced apart from one another along the peripheral edge of the disc. The wear elements are spaced apart from one another and from the cutting elements.

An industrial machine including an actuator, a gear reducer, a cutter drum, a cutter bit, a sensor, and a controller. The gear reducer is configured to receive a first rotational energy from the actuator and output a second rotational energy. The cutter drum is supported by a chassis. The cutter drum is driven by the second rotational energy. The cutter bit is coupled to the cutter drum. The sensor is configured to sense a characteristic of the industrial machine. The controller, having a processor and memory, is configured to receive the characteristic of the industrial machine, determine a cutting efficiency based on the characteristic of the industrial machine, and output the cutting efficiency.

A fluid delivery system for a longwall shearer. The fluid delivery system includes a flow control device and an electronic processor. The flow control device is in fluid communication with a nozzle positioned on the shearer, and in fluid communication with a fluid source. The electronic processor is coupled to the flow control device. The electronic processor is configured to receive a measure of a capacity parameter, and determine a model fluid flow based on the measure of the capacity parameter. The capacity parameter corresponds to a position of the shearer along the mineral face. The electronic processor is further configured to set an operational parameter of the flow control device based on the model fluid flow, and operate the flow control device at the set operational parameter.

A fluid delivery system for a longwall shearer. The fluid delivery system includes a flow control device and an electronic processor. The flow control device is in fluid communication with a nozzle positioned on the shearer, and in fluid communication with a fluid source. The electronic processor is coupled to the flow control device. The electronic processor is configured to receive a measure of a capacity parameter, and determine a model fluid flow based on the measure of the capacity parameter. The capacity parameter corresponds to a position of the shearer along the mineral face. The electronic processor is further configured to set an operational parameter of the flow control device based on the model fluid flow, and operate the flow control device at the set operational parameter.