摘要:
A hydraulic accumulator including an energy storage apparatus with a first piston face configured to reversibly compress an energy storage medium and a second piston face forming at least part of an inner surface of a corresponding second fluid chamber reversibly expandable by movement of the second piston face. A third piston face forms at least part of an inner surface of a corresponding third fluid chamber reversibly expandable by the third piston face. The first, second and third piston faces are coupled together.
摘要:
A hydraulic impact mechanism, of the valveless impact mechanism type, comprising a pre-charged gas accumulator connected to a working chamber in order to make possible impact mechanisms for equipment for rock drilling and hydraulic breakers that is lighter, cheaper and more sustainable from the point of view of material fatigue. Furthermore, a gas accumulator of piston type with an integral brake chamber (240, 250, 360) and a piston (220, 320) designed to fit into the said brake chamber (240, 250, 360).
摘要:
Oil-dynamic percussion machine having a body (1) in which there are a piston (3) which transforms the hydraulic power of the feeding circuit in mechanical power, a tool (5) that transfers the mechanical power to produce the demolition work, a Nitrogen-filled high pressure hydraulic accumulator (2) having the function of storing the hydraulic power supplied by the feeding circuit and characterised by a modulator slide valve (4) that keeps the operating pressure at a constant value; this mechanism controls the motion of the piston, his active displacement and the oil inlet and discharge control ports (19, 11).
摘要:
Characterized by there being an assembly comprising a cylinder (1) in which there is a mobile group (3) of components and having replaceable sleeves and carrying at the extremity opposed to the operating or hammer end a chamber of hydraulic fluid (7) capable of receiving and transmitting the force with respect to a gas pressure accumulator (8) coupled to the extremity of the hammer body which latter has attached thereto two valve manifolds (17,12) the first (12) of which contains a hollow slide valve controlling a system of three passages (14,15,16) for conducting hydraulic fluid to the main cylinder and the second (17) holding a system of valves for pressure regulation and safety for the hydraulic fluid chamber (7) which comes between the mobile group of the hammer and the gas pressure accumulator chamber.
摘要:
A hydraulic impact mechanism comprises a housing (10) with a cylinder bore (11) , a forward working chamber (23) and a rear working chamber (18) , a hydraulic fluid supply passage (26) continuously connected to the forward working chamber (23) and a drain passage (33) connected to the rear working chamber (18) , a hammer piston (12) reciprocally guided in the cylinder bore (11) for delivering hammer blows to a working implement (14) attached to the housing (10) , a pressure accumulator (27) pre-loaded to a certain pressure level, and a distribution valve (30) for alternatingly connecting the rear working chamber (18) to the supply passage (26) and the drain passage (33) to thereby reciprocate the hammer piston (12) , wherein a sequence valve (34) is provided in the drain passage (33) with the purpose to keep up the pressure in the rear working chamber (18) to such a level that the resulting forward directed force will prevent the piston (12) from being moved backwards in the cylinder bore (11) at pressure levels in the supply passage (26) below the pre-load pressure level of the accumulator (27).
摘要:
Oil-dynamic percussion machine having a body (1) in which there are a piston (3) which transforms the hydraulic power of the feeding circuit in mechanical power, a tool (5) that transfers the mechanical power to produce the demolition work, a Nitrogen-filled high pressure hydraulic accumulator (2) having the function of storing the hydraulic power supplied by the feeding circuit and characterised by a modulator slide valve (4) that keeps the operating pressure at a constant value; this mechanism controls the motion of the piston, his active displacement and the oil inlet and discharge control ports (19, 11).
摘要:
A fluid actuated tool in the form of a hydraulic hammer (20) comprises a body (22), a cylinder (26) and a chuck body (28). A piston (34) mounted within the cylinder (26) reciprocates and impacts on a chisel (36). Movement of the piston (34) results from the supply of hydraulic fluid, controlled by an apertured distributor valve sleeve (38) with a number of cylinder ports (40) communicating with a series of axial fluid carrying bores (42). Movement of the piston (34) and the sleeve (38) bring ports (40) and bores (42) into and out of alignment, so regulating movement of the piston (34).
摘要:
The invention relates to an arrangement in connection with a hydraulically operated impact device, such as a breaking apparatus, the impact device comprising a percussion piston (2), means for feeding pressure fluid into and out of the impact device, and a pressure accumulator. According to the inventive idea, the pressure accumulator is formed as an annular structure surrounding the percussion piston (2). It consists of sleeve-shaped pressure chambers (6a, 6b) that are separated by a sleeve-like diaphragm (11) arranged between a frame (5) and a sleeve (9). The pressure chambers (6a) and (6b) are formed such that the inner circumference of the sleeve (9) placed around the frame and the outer circumference of the frame (5) are provided with recesses opposite one another.