摘要:
A pressurizing and pressure regulating valve (12) is provided. In one embodiment, the pressurizing and pressure regulating valve includes a sleeve (14), a first flow passage (18, 24, 30) formed through the sleeve, a second flow passage (20, 26, 30) formed through the sleeve, and a piston (16) slidably disposed in the sleeve. The piston is configured to move between: (i) a pressurizing position wherein the piston impedes fluid flow through the first flow passage, and (ii) a pressure limiting position wherein the piston impedes fluid flow through the second flow passage. A sensing chamber (42) is fluidly coupled to the first flow passage and configured to receive pressurized fluid therefrom. The piston is configured to move from the pressurizing position to the pressure limiting position when the pressure within the sensing chamber exceeds a predetermined minimum pressure.
摘要:
A valve (60) for use in a brake system (10) through which a source (32) of fluid charges an accumulator (24) to a desired fluid pressure level and through which fluid pressure present in a conduit (52) is communicated to a reservoir (33) in the absence of the flow of fluid from the source. The valve (60) has a housing (62) with a bore (64) therein with an entrance port (66) connected to the source of fluid (32), an exit port (68) connected by a flexible conduit (52) to the accumulator (24) and exhaust port (70) connected to the reservoir (33). A sleeve (72) which is located in bore (64) has an internal bore (74) with a first diameter (82) for retaining a first ball (90), a second diameter (80) for retaining a linkage member (94) and a third diameter (86) for retaining a second ball (92). The communication of fluid from the source (32) to the entrance port (66) developing a force across the sleeve (72) which moves the second ball (90) into engagement with an exhaust port (70) to interrupt communication to the reservoir (33) and allow fluid to flow from the entrance port (66) to the exit port (68) for charging the accumulator (24).
摘要:
In a flow control apparatus, a fluid pressure is introduced from downstream of a metering orifice to a rear room (32) of a spool (20) while a relief valve in the spool (20) is assembled in advance. A front section (41a) of a relief valve sub-assembly (40) is press fitted to a hole (21) provided on the spool and is opening to rear room (32) of the spool so that a receiving room of a valve body in a relief valve casing (41) communicates to a bypass path (13). A communicating path (41b) provided in a rod communicates to the rear room of the spool through outside of the relief valve subassembly (40). The relief valve casing (41) is received in a receiving hole (21) provided in the spool (20) and a cylindrical room between the relief valve casing and the receiving room is used as a part of a communicating path.
摘要:
Es wird eine Ventilanordnung für eine hydraulische Fördereinrichtung, insbesondere für eine Lenkhilfpumpe, mit einem Stromregelventil und Druckbegrenzungsventil vorgeschlagen, die sich dadurch auszeichnet, daß das Stromregelventil (3) und das Druckbegrenzungsventil (5; 105) zwei getrennte Komponenten der Ventilanordnung (1) darstellen, die in ein und derselben Ausnehmung (7) im Gehäuse (9) der hydraulischen Fördereinrichtung angeordnet sind.
摘要:
Offenbart ist ein Ventil vorzugsweise der Stromregelbauart mit einem Ventil- bzw. Druckwaagekolben, der axialverschieblich in einem Ventilgehäuse gelagert ist. Der Ventilkolben und das Ventilgehäuse bilden eine Dämpfungskammer zur Bewegungsdämpfung des Ventilkolbens aus.
摘要:
A check valve (20) with a body (22) and a hole (30) extending from an inlet (24) to an outlet (26). A piston assembly (52), mounted in the body (22), includes a piston (54), a check valve seal (60) and a piston spring (55). The piston spring (55) biases the piston (54) to a first location preventing air from flowing from the inlet end (24) toward the outlet end (26). The check valve seal (60) is positioned to seal against a check valve seat (37). Movement of the piston (54) removes the check valve seal (60) from the check valve seat (37), allowing air to flow from the inlet end (24) toward the outlet end (26). A tapered portion (64) of the hole (30) permits usage with systems having different volume output levels. A dampener (31) reduces fluctuations of the piston (54) caused by cyclical fluctuations in fluids controlled.
摘要:
According to one aspect of the present invention there is provided a valve assembly (1) which includes: at least one valve port; at least one fluid inlet (3); and an outlet (4) for connection to a fluid system; characterised in that the valve assembly includes a pressure sensitive member (18) which is connected to the outlet, so that the size of the pressure sensitive member is capable of increasing or decreasing in response to pressure changes within the fluid system, wherein the valve is configured so that said increases or decreases to the size of the pressure sensitive member cause the inlet and valve port to move either into or out of alignment with one another.
摘要:
A valve (60) for use in a brake system (10) through which a source (32) of fluid charges an accumulator (24) to a desired fluid pressure level and through which fluid pressure present in a conduit (52) is communicated to a reservoir (33) in the absence of the flow of fluid from the source. The valve (60) has a housing (62) with a bore (64) therein with an entrance port (66) connected to the source of fluid (32), an exit port (68) connected by a flexible conduit (52) to the accumulator (24) and exhaust port (70) connected to the reservoir (33). A sleeve (72) which is located in bore (64) has an internal bore (74) with a first diameter (82) for retaining a first ball (90), a second diameter (80) for retaining a linkage member (94) and a third diameter (86) for retaining a second ball (92). The communication of fluid from the source (32) to the entrance port (66) developing a force across the sleeve (72) which moves the second ball (90) into engagement with an exhaust port (70) to interrupt communication to the reservoir (33) and allow fluid to flow from the entrance port (66) to the exit port (68) for charging the accumulator (24).