摘要:
Deposits, such as coal, tar sand, heavy crude oil and/or minerals are excavated from an underground formation layer (4) by:—inserting a chain cutter string (11) into a 1st section (8, 9) and a control cable (12) into a 2nd section (10) of a T-, V-, U-, or L-shaped channel assembly (8, 9, 10) traversing the layer (4);—connecting the control cable (12) to the chain cutter string (11) at a branchpoint (13) of said 1st & 2nd sections (8, 9 & 10); and—pulling the chain cutter string (11) in a continuous or oscillating manner through the first section (8,9) while continuously pulling the control cable (12), such that the chain cutter string (11) carves deposits from the layer (4) and the control cable (12) optimizes the performance and reduces the risk of breakage of the chain cutter string (11).
摘要:
The invention employs pressure and displacement sensors for the automatic monitoring and adjustment of the pre-tension of endless belts, in the form of chains or the like, which sensors determine the pressure in the cylinder space and the movement of the piston of the tensioning cylinder, and the measuring signals from which sensors are evaluated by an electronic evaluation and actuation unit. In this respect the evaluation and actuation unit calculates from the measuring signals the changes in pressure which occur over a predetermined partial stroke of the piston of the tensioning cylinder, wherein these changes in pressure reflect the state of tension of the chain belt. When the chain tension is incorrect, the evaluation and actuation unit can therefore control the tensioning cylinder so that the optimum chain tension is set automatically.
摘要:
A plough box containing a chain wheel driving a chain to propel a chain used to move a plough is mounted for displacement alongside a machine frame at one end of a scraper-chain conveyor. To adjust the tension in the chain a motor is operated to drive a self-locking worm gearing which employs a worm wheel meshing with a rack fixed to the machine frame and extending in the direction of the chain.
摘要:
A hollow gearwheel has internal teeth that mesh directly or through an intermediate gear with the teeth of a drive gear of a machine drive on a drum cutter mining machine. External teeth on the hollow gearwheel mesh with the teeth of a rack extending over the distance traversed by the mining machine along the face of a longwall mine. A plate pivots about the rotational axis of the drive gear while the plate forms a closure to the side of the hollow gearwheel facing the mining machine. The plate carries a bearing support for the arbor shaft of the hollow gearwheel and forms a seal along the outer peripheral edge of the hollow gearwheel. A carrier includes a bearing to support the outer end of the arbor shaft. The carrier is moved along a recess in a housing for the hollow gearwheel to adjust, by pivotal positioning, the hollow gearwheel.
摘要:
An extraction machine for an extraction installation is disclosed. The extraction installation may have a chain having a first chain strand section with a first end and a second chain strand section with a second end. The first and second chain ends may be connectable to the extraction machine for moving the extraction machine. The extraction machine may have a first chain mount configured to be connected to the first chain strand section. The extraction machine may also have a second chain mount configured to be connected to the second chain strand section. In addition, the extraction machine may have a first pre-tensioning device for building up a pre-tensioning force acting on the first chain mount such that a pulling force acts on the first chain strand section in the direction of the second chain mount.
摘要:
The invention relates to a plowing device having a plow chain which is guided inside a channel (2) having an inner radius (A1) and the chain links of which each have chain bends (5) and chain limbs (6) connecting the latter. In cross section, the chain limbs (6) each have an outside radius that extends along a chord length, wherein the inner radius (A1) of the channel (2) and the outer radius of the chain limbs (6) have a ratio of 1:0.8 to 1:1.2 in relation to one another.
摘要:
A coal plane guiding device has plane guiding profiles with an upper and a lower chain channel for a planing chain and they are provided with intake gates disposed at both ends of the plane guidance system for the entry of the planing chain. For this purpose, the plane guiding end profiles or attached intake gates have, in the area of the chain channel, an intake spiral of helical nature with a hollow core for the planing chain shaped so that jammed chain links can return helically into their normal position in the course of entering the chain channel.
摘要:
A coupling device for connecting a mineral mining machine, such as a plough, to a drive chain. The coupling device is intended to locate within a channel inside a slotted guide containing the drive chain. The device is composed of coaxial tubular members secured together axially. The inner tubular member supports a swivel-mounted shackle connecting with the chain and a rigidly-mounted shackle connecting with the machine. One or both tubular members are shaped or relieved at the end nearest the swivel shackle to provide a cleaning nose which forces dust or the like from the channel as the chain draws the machine along the guide. A lateral projection on the outer tubular member engages in the slot and co-operates with the nose to guide the material away through the slot.