SU421807A1 - TWO-POSITIONAL HYDRAULIC CYLINDER WITH LOCKS IN ULTIMATE POSITIONS - Google Patents

Description

one

The invention relates to hydraulic and pneumatic systems for driving apparatus with rigid fixation of the actuated member in extreme positions by mechanical locks located in the hydraulic cylinder of the actuator, and can be used in aircraft.

Known two-cylinder actuator cylinders with locks in the extreme positions of the stem, made of housing, stem and roof.

A disadvantage of the known cylinders is that the mechanical locks located on the rod in series each have their own chamber closing the mechanical lock, its spring holding its floating piston in the lock locked position, and the chambers are hermetically separated by an additional piston rod. Mixing all these elements increases the length of the cylinder and the weight.

The aim of the invention is to reduce the length, diameter and weight of the cylinder.

To this end, the floating locking pistons of hydromechanical locks are made with elongated shanks, so that the shank of one of the pistons contacts the body of the other piston both at the moments of release and the rod cleaning, and at the moments of closing the locks, and in their volume , situated

holding and spring, and the volume itself is connected to the drain line of the system.

The drawing shows the proposed two-position hydraulic cylinder (stem completely

cleaned and rigidly fixed hydromechanical lock).

The housing 1 of the hydraulic cylinder is closed on one side of the buksoy 2, and on the other - the lid 3 with eye. Inside the Cornus is a stock

4, on which a floating piston 5 with an extended stem of the minimum piston diameter is mounted; a floating piston 6 with an extended XBOCTOBTIKOM along the maximum piston diameter; spring-loaded non-return valve 11, communicating the volume A with the outlet cavity B,

and a spring-loaded non-return valve 12, communicating the volume A with the cleaning cavity B.

The hydraulic cylinder works as follows.

When supplying the working fluid under pressure to the outlet cavity B, the floating piston 5 moves towards the outlet side until it stops by the body into the elongated shank of the piston 6, compressing the spring 8 and squeezing the working fluid out of the volume between sleeves 5 and

6 and their shanks to the drain line.

either directly connected to this volume in the case of a small stroke of the rod, or through a check valve 12 into the cavity B, reported at the time of release with a drain in the event of a significant stroke of the rod (the check valve 11 is locked with working fluid pressure from cavity B ). The spring-loaded split ring 7 is released, the hydromechanical lock of the retracted stem position is open. Under the action of the stop nut 9, the ring 7 is compressed and exits the locking groove in the housing 1. The stem 4 is moved to the outlet until it stops at the cover 2, while the second locking ring 7 stops under the locking groove in the housing 1, the stem is released.

Under the action of pressure of the working fluid, the piston 5 is mixed, resting against the shank of the piston 6, the latter at the same time expanding the locking ring 7, pushes it into the locking groove in the housing 1 and locks it there. Hydromechanical lock of the released position is locked. When the working pressure PZ of the cavity B is removed, the floating piston 5 under the action of the spring

8 moves up to the stop into the spring ring 7, and the floating piston 6 is held in the locked position by the spring 8. When cleaning the stem, the pressurized fluid is fed into the cavity B, and the same operation is performed in the reverse order.

Subject invention

Two position hydraulic cylinder

with locks in the extreme positions of the rod, made in the form of a housing, a rod, hydromechanical locks of the extended and retracted position of the rod with floating locking forces, and a flap, differing

m. that, in order to reduce the size and weight of the hydraulic cylinder, the floating locking pistons of hydromechanical locks are made with elongated shanks, so that the shank of one of the pistons is in contact with the body

another piston, both at the moment of release, cleaning of the rod, and at the moments of closing the locks, and in the volume limited by the floating guns and their shanks, a holding spring is located, the volume being connected to the drain line of the system.

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