摘要:
The hydraulic machine includes a cam and a cylinder block with pistons co-operating with cam lobes, each of which has two ramps extending between top and bottom dead center arcs. The cylinders are connected in alternation to a feed and to a discharge, in sequences separated by switchover stages including an isolation stage during which they are isolated relative to the feed and discharge main ducts. The angular position of the start or of the end of at least one first isolation stage relative to the corresponding dead center arc is different from the angular position of the start or of the end of at least one second isolation stage relative to its corresponding dead center arc, both of these dead center arcs being top dead center arcs or both of them being bottom dead center arcs.
摘要:
A hydrostatic radial piston machine is useable inversely. The hydrostatic radial piston machine has a distributor in which a flushing valve, a pressure-maintaining valve connected downstream of the flushing valve, and two nonreturn valves are arranged.
摘要:
THE INVENTION RELATES TO A VALVING SYSTEM FOR FLUID PRESSURE ENGINES, SUCH AS STEAM ENGINES, FEATURING THE UTILIZATION OF SPRING PRESSED CHECK VALVES, SUCH AS A BALL FOR CONTROLLING THE SUPPLY OF PRESSURED FLUID TO THE ENGINE EACH SUCH VALVE BEING PERIODICALLY ACTUATED TO AN OPEN POSITION BY A MOMENTARILY APPLIED IMPACT FORCE. THE INVENTION ALSO PROVIDES AN INEXPENSIVE CONSTRUCTION FOR A
RELATIVELY SMALL FLUID PRESSURE ENGINE, PERMITTING THE UTILIZATION OF SUCH ENGINES IN APPLICATIONS SUCH AS DOMESTIC LAWN MOWERS, SMALL GARDEN TRACTORS, OR MARINE ENGINES.
摘要:
The invention relates to a radial piston hydraulic motor (100) and to a method in the control of a radial piston hydraulic motor. The radial piston hydraulic motor (100) includes a free rotation valve (50) which is built inside it and includes a spindle (19). The spindle (19) is disposed in a spindle cavity (20) and it is movable in the spindle cavity (20) such that, in a free rotation situation, shoulders of the spindle (19) block the inlet and outlet passages of working pressure. In a free rotation situation, springs (U1, U2 . . . ) press pistons (13a1, 13a2 . . . ) and press rollers (14a1, 14a2 . . . ) associated therewith to a bottom position and out of contact with a cam ring (11).
摘要:
A thermohydraulic engine comprising a power output member coupled to at least one compartment of variable volume. The compartment is placed in fluid communication with at least one of two or more expansion chambers. A liquid such as water fills the compartment and a fluid path to the at least one expansion chamber and partially fills said one expansion chamber. Means provided in each expansion chamber for introducing a product capable of producing energy by its expansion, whereby when the liquid in said one, partially filled expansion chamber has reached a predetermined level as a result of a liquid flow from the compartment, the product is introduced into the unfilled portion of said one expansion chamber and as a result of its expansion urges liquid back into the compartment to produce relative rotation between the compartment and the power output member. The cycle is repeated in the next expansion chamber and so on. The number of compartments is always less than twice the number of expansion chambers.
摘要:
The present invention relates to a hydraulic device (10) with radial pistons, comprising: a shaft (12) arranged along an axis (1); a cover (13) forming a casing element, the cover and the shaft being free to rotate with respect to one another; a distribution assembly comprising: a multi-lobe cam (14); a cylinder block (15); a distributor (16) configured to exert a thrust force (P) against the cylinder block (15) along the axis (11) of the shaft; an assembly (22) of mechanical bearings comprising at least one mechanical bearing (22a) mounted in radial contact between the cover (13) and shaft (12), said assembly being configured to take up the thrust force (P) exerted by the distributor (16); and a radial contact ball bearing mounted in radial contact between the cover (13) and the shaft (12).
摘要:
A hydraulic-powered motor for stepwise operation has a plurality of radial pistons in a rotatable cylinder block, the pistons engaging a cam track having a number of indentations which is different from the number of the pistons. Electrically operated valves are provided and are energizable in sequence to apply pressure pulses to the pistons to cause stepwise rotation of the cylinder block. Detent means may be provided to prevent rotation of the cylinder block in the absence of a pressure pulse to any one of the pistons.