RU1800156C - Hydraulic drive - Google Patents

Abstract

SUMMARY OF THE INVENTION: two additional grooves and additional radial channels are made in the sleeve, with grooves connected to the corresponding axial channels of the sleeve, on the plunger. Additional grooves are made to communicate with additional grooves of the sleeve. 1 ill.

Description

The invention relates to hydraulic engineering and can be used in hydraulic drives.

The aim of the invention is to enhance the functionality.

The drawing shows a structural diagram of the hydraulic drive.

The hydraulic actuator includes a proportional control device, a hydraulic motor, the working cavities of which are communicated through a control device with pressure and drain hydraulic lines, while the proportional control device is made of housing 1 with pressure 2, drain 3 and working 4.5 channels, in the bore 6 of which movable sleeve 7, forming two end cavities 8, 9 and a plunger 10, forming a spool pair with sleeve 7. In the sleeve 7, pressure head 11 and working 12, 13 radial channels are made, communicating through mating grooves 14, 15, 16 in the sleeve 7 and the housing 1 with the corresponding channels 2,4,5 of the housing 1 and axial channels 17, 18 communicating the working radial channels 12, 13 through the corresponding grooves 19, 20, 21 in the sleeve 7 and the housing 1 with a drain channel 3 of the housing 1, In the plunger 10 there are six grooves 22, 23, 24. 25, 26. 27, communicated by radial 28, 29, 30, 31, 32, 33 and axial 34, 35 channels three in each other. In the sleeve 7, two additional grooves 36, 37 are made. And additional radial channels 38, 39 through which additional grooves 36, 37 are connected to the corresponding axial channels 18-17 of the sleeve 7, and additional grooves 40, 41 are made on the plunger Yu for communication with additional grooves 36, 37 of the sleeve 7 .:

The hydraulic actuator operates as follows.

In the middle position of the plunger 10 and the sleeve 7, the working cavities of the hydraulic motor are communicated through a proportional control device with a drain hydraulic line ..

When the plunger 10 is displaced, for example, to the right position of the end cavity 9 through the groove 27, channels 33, 35, 32, groove 26. channels 13, 18, grooves 20, 21 communicate with the drain channel 3. At the same moment, the end cavity 8 through channel 22, channels 28, 34, 30, channel 24, channel 11, channel 14 communicates with pressure channel 2, Sleeve 7 moves to the right under the influence of differential pressure in cavities 8, 9, separating drain channel 3 and cavity

With

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ate about

YU

9. With further displacement of the plunger 10 to the right position, the working fluid is displaced from the cavity 9 through the groove 27, channels 33, 35, 32, groove 26, channel 13, groove 16 and working channel 5 into one of the working cavities of the hydraulic motor. The other cavity of the hydraulic motor is connected at this time with a drain hydraulic line,

When the plunger 10 is shifted from the right to the middle position, the cavity 9 through the groove 27, channels 33, 35, 31, groove 25, channel 11, groove 14, channel 2 is connected to the pressure hydraulic line. At this time, the cavity 8 through the groove 22, the channels 28, 34,29, the groove 23, the channels 12, 17, the grooves 19, 21, is connected to the drain line. Under the influence of a pressure differential in the end cavities 8, 9, the sleeve 7 moves to the left, providing a fluid discharge from the hydraulic motor cavity proportional to its movement through the channel 5, .protection 16, channel 13, grooves 41, 37, channels 39, 17, groove 19, 21 , channel 3 into the drain hydroline. The output element of the hydraulic motor is proportional to the movement of the plunger

0

5

0

5

10 moves from the extreme to the middle position under the action of a positional load or spring.

When the plunger 10 is displaced to the left position according to the scheme, the operation of the hydraulic actuator occurs similarly.

The use of the proposed hydraulic drive in the following systems will increase their reliability and durability by eliminating a number of electrical elements: position sensors, adders, power amplifiers, electro-hydraulic converters, etc.

Claims (1)

The claims Hydraulic actuator St. No. 1652682, due to the fact that, in order to expand the functionality, two additional grooves and additional radial channels are made in the sleeve, by means of which additional grooves are connected to the corresponding axial channels of the sleeve, and additional grooves are raised on the plunger for communication with additional grooves of the sleeve.  VD 36 38 2923 30 2f 3J 25 32 26 21 35 20 / 37.39