SU992851A1 - Hydraulic drive - Google Patents

Description

The invention relates to general machine building and can be used in hydraulic drives for controlling working bodies of self-propelled machines.

A hydraulic actuator is known, containing the main and auxiliary power sources, a two-position hydraulically operated switch, a hydraulic cylinder with a rod and a sleeveless cavity, and a four-way distributor, two lines of which are connected to the rod and rodless cavity, one with the main power source and a drain valve. the borehole cavity is connected to an additional power source through a switch 1 3 "

A disadvantage of the known device is that the actuator associated with the cylinder during operation when using a hydraulic drive on a snowplow does not provide high-quality work, as the changing terrain causes the change of the position of the actuator and does not prevent its emergence.

The purpose of the invention is to improve the quality of work.

This goal is achieved by the fact that the hydraulic actuator is equipped with an OR valve, a switch is installed between the rodless cylinder and a distributor, and the control cavity of the switch is connected through the OR valve to the distributor lines connecting it to the hydraulic cylinder cavities.

In addition, additional

The 10 point is equipped with a pressure and pressure valves, installed on the drain line, and a switch is connected to it between the pressure relief valves and the pressure valves. .

15

The drawing shows a diagram of the hydraulic drive.

The hydraulic drive contains the main source 1 pmtani, the distributor 2, made four-line, hyd20. cylinder 3 with rod 4 and rodless cavity 5, ram 6 IDN switch. 7 with a spring 8 and a control cavity 9, an additional power supply 10, a reduction 25 and 11 Nshorny 12 valves mounted on. line 13 drain.

Claims (2)

. The distributor 2 is connected by lines 14 and 15 to the cavities 4 and 5 of the hydraulic cylinder 3, the main source of 1 pi30 and drain 16. The line 13 of the additional source 10 supply is connected by line 17 to switch 7, the control cavity 9 is connected by line 18 through valve 6 OR with lines 14 and 15. Moreover, the distributor 2 is connected to pinless cavity 5 by line 14 through a primary switch 7 and line 19, and the hydraulic cylinder 3 is connected to the actuator 20. The hydraulic actuator operates as follows. The recovery mechanism E 20 is lifted when the limiter 2 is turned on in a position that supplies the working fluid from the main power source 1 to the rod cavity 4 of the hydraulic cylinder 3 black line 15. At that, the working fluid under pressure through valve 6 OR and line 18 is fed to cavity 9 control switch 7, which connects the rodless strips 5 of the hydraulic cylinder 3 through line 1, switch 7, line 14 and distributor 2 with slot 16, and the working fluid from the additional power source 10 through line 13, reduction 11 and pressure valve 12 enters the sleeves 16. The actuator 20 is lowered by switching on the distributor 2 to a position that supplies the working fluid from the main 1 power source to line 14. The working fluid under pressure through valve 6 OR and line 18 is supplied to control chamber 9 of switch 7, which ensures installation of switch 7 to the position connecting line 14 to line 19, and the working fluid enters the rodless cavity 5 of the hydraulic cylinder 3, and the rod cavity 4th of the hydraulic cylinder is connected Using 16 via distributor 2.; When the actuator mechanism 20 is lowered, an additional power source is also connected to the drain 16 via valves 11 and 12. When the actuator 20 reaches the working position, the valve 2 is set to the floating position, in which lines 14 and 15 are connected via valve 2 to the drain 16. In this case, the switch 7 under the action of the spring 8 is installed in the position 1 providing the connection of the additional power source 10 through the reducing valve 11 and the switch 7 to the rodless cavity 5 of the hydraulic cylinder 3, One of the pressures determined by the setting of the reducing valve 11 .. This corresponds to pressing the actuator 20 against the processed surface under pressure corresponding to the setting of the pressure reducing valve 11. In the case of raising (floating) of the actuator 20. under the influence of the surface relief the fluid from the rodless cavity 5 of the hydraulic cylinder 3 is forced out to drain through the pressure valve 12, which is set to a greater pressure than the reducing valve 11. Thus, the invention provides more hydrodrive Qualitative care. Claim 1. A hydraulic actuator comprising a main and auxiliary power sources, a two-position hydraulically controlled switch, a hydraulic cylinder with a rod and rodless cavity, and a four-line distributor, two lines of which are connected to the rod and rodless cavity, one with the main power source and one a drain, the rodless cavity being connected to an additional power source through a switch, which is because in order to improve the quality of work, it is equipped with an OR valve, the switch anovlen between the cavity and the rodless dispenser, and the control chamber is connected via a switch valve or the distributor to the lines, it zygvayuschim communication with the cavities of the hydraulic cylinder. 2. A hydraulic actuator according to claim 1, characterized in that the additional source is equipped with pressure reducing and pressure valves installed on the discharge line, and a switch is connected thereto between the pressure reducing and pressure valves. Sources of information taken into account during the examination 1. Dubrovsky. Hydraulic drives of ship mechanisms .. L.,. Shipbuilding, 1969, p. 146, fig. 46a. / 5 10