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2 148 191

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C1

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IPC

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Application

98104549/06, 1998-02-23

(24)

Start date

1998-02-23

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Actual filing date

1998-02-23

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Published

2000-04-27

(72)

Inventor

Red'Ko P.G.Ambarnikov A.V.Tychkin V.I.Rjabov V.M.

(73)

Holder

Otkrytoe Aktsionernoe Obshchestvo Pavlovskij Mashinostroitel'Nyj Zavod

PUMP HYDRAULIC DRIVE Russian patent published in 2000 - IPC

Abstract RU 2148191 C1

FIELD: hydraulic control systems of load lifting machines, river vessels, machine tool building, aircraft industry. SUBSTANCE: pump hydraulic drive has variable-capacity pump, slave hydraulic motor hydraulic distributor, electromechanical converter and gauge-pressure closed hydraulic tank. All these devices are installed in common housing and are connected by hydraulic lines. Hydraulic tank has compensating device consisting of spring unit placed inside bellows accommodating preloaded spring placed between two stops one of which is installed for engagement with bellows bottom for movement on other stop which is installed for movement on boss made in end face part of hydraulic tank and is in engagement with plunger controlled by delivery pressure and arranged in above-indicated boss. Bellows are arranged inside hydraulic tank so that their outer surface is in contact with working liquid, and inner surface, with atmosphere. EFFECT: enhanced reliability of starting and serviceability of hydraulic drive at long storage in wide ambient temperature range. 1 dwg

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RU 2 148 191 C1

Authors

Red'Ko P.G.

Ambarnikov A.V.

Tychkin V.I.

Rjabov V.M.

Dates

2000-04-27—Published

1998-02-23—Filed

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