摘要:
A mushroom-shaped shield body, that is, a shield body having a configuration consisting of a back surface tapered section having its diameter successively increased towards the inside of an accumulator and a stem portion, is disposed coaxially at the inside end portion of a liquid feed/discharge port of the accumulator, and an inner surface tapered section is formed along the circumference of the liquid feed/discharge port opposed to the back surface tapered section of the shield body to form an annular liquid flow path between said back surface tapered section and said inner surface tapered section so that the direction of the liquid flow passing through this annular flow path may be directed along the inner wall surface of the vessel of the accumulator, whereby a diaphragm disposed within the accumulator can be deformed so as to conform to the inner wall surface of the vessel and thus the volume efficiency of the accumulator can be enhanced.
摘要:
In a bladder type accumulator the interior of which is divided by an expandable bladder into a gas chamber and a liquid chamber, a cartridge filled with gas is housed in said gas chamber, said cartridge is provided with a perforation means at its top for allowing pressure gas to flow out from said cartridge. During storage of the accumulator the cartridge is kept tightly closed so that the bladder remains relaxed and pressure of gas remains unchanged.
摘要:
A hydraulic circuit includes a pump driven by a motor, an inverter for controlling the motor, and an accumulator. The inverter controls rotational speed of the motor such that the pump always discharges hydraulic fluid at a fixed flow rate, which is the sum of an average necessary flow rate and an adjustment flow rate. The accumulator operates, when the fixed flow rate and a necessary flow rate differ, in order to accumulate or discharge the hydraulic fluid to thereby secure the necessary flow rate.
摘要:
A mounting flange is formed at the opening of the bladder formed into the shape of a bag from elastic material such as rubber; and a thin wall section is formed to prevent stress concentration near the base of the mounting flange.
摘要:
An expansion-type fuse safety device for an accumulator has a fuse packing having a through hole of a diameter smaller than the outside diameter of a sealing portion of the flanged valve casing. The valve casing is inserted into the through hole of the fuse packing so as to project outward from a pressure vessel through a passage hole formed in the pressure vessel. A tightening nut is screwed to the projecting end of the valve casing so that the fuse packing is pressed between the inner surface of the pressure vessel and the flange of the valve casing.
摘要:
A guide projecting into a bladder is provided on a plug of a vessel body. A cup-shaped sensor is slidably provided on the guide, and an element for actuating a switch is provided on the cup-shaped sensor. The cup-shaped sensor is caused to slide along the guide by the bladder deformable in accordance with change in the pressure of liquid within the accumulator, so as to actuate the switch.
摘要:
In an NC-lathe comprising a thread touch sensor provided with a touch portion to be brought into contact with an effective radius/diameter portion of a screw thread, an automatic measuring device electrically connected to the thread touch sensor, and an automatic correction device connected to the automatic measuring device; an effective radius or diameter of a screw thread is measured by bringing the touch portion of the thread touch sensor into contact with an effective radius/diameter portion of the screw thread, the measured dimension is compared with a desired dimension, and when a difference is produced between the respective dimensions, the NC-lathe is controlled by correcting an amount of machining by means of the automatic correction device.
摘要:
A temperature responsive fusible packing is inserted in a ring shaped space defined between the lower face of a bolt head and the bottom face of a recessed portion formed on the supply port of a gas chamber of an accumulator and then the bolt is tightened, so that the fusible packing can act as a packing which blocks both the gas passage and the inner passage formed through the shank of the bolt. In the event where, the temperature responsive fusible packing should melt due to a fire or the like, since the thus fused packing is expelled outside the device through a gap formed between the wall face of the recessed portion and the outer periphery of the bolt head, a vacant space would be formed there to expose the inner passage to an open air and allows the gas in the gas chamber to be discharged outside.
摘要:
In this pulsation absorbing device, a cylindrical resilient protective diaphragm and an inner cylinder formed with one or more communicating holes are disposed within a cylindrical pressure vessel being in concentrical with each other.Along the outer surface of the inner cylinder one or more arched resilient valve members and one or more leaf springs being laminated with each other are disposed capable of being raised or lowered depend upon the extent of the fluid pressure, thereby the arched valve member can be separated in its function of valve action and spring property, therefore the both members are strengthened by the lamination as well as their deformation and extent of fatigue can be kept minimum.
摘要:
This pulsation absorbing device is received in a cylindrical pressure vessel includes a cylindrical resilient diaphragm and an inner cylinder formed with a plurality of communicating holes around its wall. It is further provided with one or more slidably movable valve shoes and both of said diaphragm and the inner cylinder are disposed concentrical with each other. One or more arched leaf springs are disposed along the outer face of the inner cylinder and at the place able to cover the communicating holes and are slidably coupled to the inner cylinder by suitable number of pins; and the stroke of the slidable movement given to the pins is made larger than the stroke of the spring motion of said leaf springs, consequently, impinging of the stopper of the pin against the inner cylinder can be avoided, even if the pins may travel being urged by the leaf spring, due to sudden change of fluid pressure in the inner cylinder, over the stroke of the leaf spring.