SU1229416A1 - Reversible hydraulic motor for closed-loop transmission - Google Patents

Description

1229416

2. The hydraulic motor according to claim 1, which means: with the middle part towards the side, the fact that the outlets of the housing cross section of the valve OR are reduced.

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This invention relates to a hydraulic actuator operating with a closed fluid circuit.

The purpose of the invention is to simplify the design and increase reliability.

FIG. 1 shows a hydraulic motor, a section along the axis of rotation of the hydrogenerator; in fig. 2 - the same, a section on the valve OR.

A reversible hydraulic motor for a closed-loop transmission contains channels 2 for supplying 3 and discharging 4 working fluids placed in the lid 1 of the 2 pp unit, the overflow valve 5 installed in the drain line 6, two safety valves 7 and 8, each of which is installed in one from the inlet channels 3 and outlet 4, and the valve OR 9, having 10 spool locking elements 11 and 12 and end control cavities 13 and 14 placed in its housing, each inlet channel 3 and outlet 4 communicating directly with one of the end control cavities 13 and 14 and one of the input lines 15 and 16 of the valve OR 9 and through the safety valve 7 or 8 - with the overflow valve 5, and the output lines 17 and 18 of the valve OR 9 are connected to the overflow valve 5. The valve body 10 of the OR 9 is hollow and installed with the possibility of axial movement in the valve 1, which is provided with stops 19 and 20 for interacting with slide valves 11 and 12 placed in the cavity 21 of the housing 10 and made flow-through, and each safety valve 7 and 8 is placed in the middle part 22 of the cavity 21 of the housing 10 , is associated with its sub valve with a cavity 23 through one of the flow-through slide valve elements 11 and 12 with interconnected input line 15 or 16 and the end control cavity 13 or 14.

The output lines 17 and 18 of the valve OR 9 are formed with a cross section decreasing towards the middle part 22 of the cavity 21 of the housing 10. The motor works as follows

In the initial position with no load on the hydraulic motor pressure

in the inlet channels 3 and outlet 4 are the same, the valve OR 9 is in the middle position, the inlet channels 3 and outlet 4 are cut off from the overflow valve 5, as a result of which it is closed.

If there is a load in the supply channel and the end cavity, the pressure of the working fluid increases, the valve body 10 OR 9 is displaced relative to the spool locking elements 11

and 12, connect the front cavity 14, and hence the outlet channel 4

with input 16 and output 17 1) POTI

and further with overflow valve 5. With increasing pressure of the working fluid

in the supply channel and respectively

in the end cavity 13 above the permissible pressure rises also in the cavity 21 of the housing 10 and in the subvalvular cavity 23. The spool locking element 11 moves and connects the end cavity 13 through the input line 15 to the output line 17. In addition, the safety valve 7 opens the cavity 23 with the middle part 22 of the cavity 21 and further also with the output line 17. The pressure drops and the slide valve 11 and the safety valve 7 return to their original position.

Similarly, the motor works with reverse. In this case, the working fluid will be supplied through the channel 4 and, therefore, high pressure will be in the end cavity 14.

FIG. 2

Claims (2)

1. REVERSE HYDRO MOTOR FOR TRANSMISSION WITH A CLOSED CIRCUIT, containing the channels for supplying and discharging the working fluid located in the cover of the cylinder block ¹ , an overflow valve installed in the drain line, two safety valves, each of which is installed in one of the channels for supplying and discharging, and a valve OR, having located in its casing of the control cavity, and each channel of supply and exhaust communicated directly with one of the end control cavities and one of the input lines of the valve OR and through the safety to the valve is with an overflow valve, and the output lines of the OR valve are connected to the overflow valve, characterized in that, in order to simplify the design and improve reliability, the valve body OR is hollow and axially moved in the cover, which is equipped with stops for interaction with spool valves with elements placed <g in the body cavity and made flow-through, and each safety valve is located in the middle part of the body cavity, connected to its subvalve cavity through one of the flow-through ash tnik locking elements with interconnected input line and end control along ^- 2. The hydraulic motor according to π. 1, characterized in that the output lines of the OR valve are made with decreasing cross section towards the middle part along the post cavity of the body.