Hydrostatic transmission

 

The invention relates to the field of hydro, and more specifically to an adjustable hydraulic transmission volume type that is installed in the mechanisms of rotation of the transmission of tracked vehicles. Hydrostatic transmission includes a main adjustable pump 1 with the mechanism of regulation 2, the hydraulic motor 3, the valve control 5 feedback 4, the inductor 6, the protection device 7 and the valve device 10. The protection device 7 consists of a cylindrical spool with distribution grooves on the lateral surface, adjustable spring 8 and the control cavity 15 with the set before her orifice 9. Valve device 10 made in the form of two back 12 and one pressure reducing valves 11, the core 13 and the control 14 of the hose. The main hydroline 13 connects the main adjustable pump 1 to the hydraulic motor 3 in a closed loop. Management hydroline 14 connects the mechanism of regulation 2 of the main pump with the main hydroline 13 through the back 12 and the pressure reducing valve 11 valve device 10, the protection device 7, the throttle 6 and the valve control 5. The latter has a mechanical feedback 4 with the mechanism of regulation 2. The control cavity 15 protection device 7 is connected with grosseserrata through a special channel provided in the cylindrical spool, the housings of the motor 3 and the main pump 1. The technical result is increased reliability and efficiency of safety devices, as well as advocate for the hydrostatic transmission from overload when the load increases on the shaft of the motor. 1 Il.

The invention relates to the field of hydro, and more specifically to an adjustable hydraulic transmission volume type that is installed in the mechanisms of rotation of the transmission of tracked vehicles.

Known hydrostatic transmission containing the main adjustable pump control mechanism, the hydraulic motor, the valve is in the feedback control, the throttle, the protection device comprising a cylindrical spool with distribution grooves on the lateral surface, adjustable springs and cavity control put before it by the throttle valve device made in the form of two back and one pressure reducing valve, main and control of hydroline, the main hydroline connects the main adjustable pump with hydraulic motor in a closed circuit, and the control hydroline connects the mechanism of regulation of the main pump with the main hydroline is to be placed, which has a mechanical feedback mechanism of regulation [1].

When working hydrostatic transmission mode actuation of the protection device reduces the working fluid of the main pump by connection of a regulatory mechanism housings of the motor and the main pump through the valve control, the throttle device protection. The reliability and efficiency of the safety devices is dependent on the control pressure reducing valve device, that is, from his performance, tuning accuracy and workmanship.

The aim of the invention is to improve the reliability and efficiency of the safety devices hydrostatic transmission from overload when the excess load on the shaft of the motor.

To achieve the objectives proposed in the hydrostatic transmission, containing the main adjustable pump control mechanism, the hydraulic motor, the valve is in the feedback control, the throttle, the protection device comprising a cylindrical spool with distribution grooves on the lateral surface, adjustable springs and cavity control put before it by the throttle valve device made in the form of two back and one is meiramy pump with hydraulic motor in a closed loop, and management hydroline connects the mechanism of regulation of the main pump with the main hydroline through return and pressure reducing valve valve device, the protection device, the throttle valve control, which has a mechanical feedback mechanism of regulation, to connect the control cavity protection device with the main hydroline through the check valves of the valve device, and the control cavity protection device has a guaranteed leak that grosseserrata, through an orifice provided in the cylindrical spool, the housings of the motor and the main pump.

Such a connection control cavity protection device will improve its reliability and efficiency.

The drawing shows part of a hydrostatic transmission with a power protection device from the main hydroline through the check valves of the valve device.

Hydrostatic transmission includes (see drawing) main main pump 1 with the mechanism of regulation 2, the hydraulic motor 3, the valve control 5 feedback 4, the inductor 6, the protection device 7 consisting of a cylindrical spool with distribution grooves on the lateral surface, adjustable spring 8 and the floor who's 12 and one pressure reducing valve 11, the core 13 and the control 14 of the hose, with hydroline 13 connects the main adjustable pump 1 to the hydraulic motor 3 through a closed circuit, and the control hydroline 14 connects the mechanism of regulation 2 of the main pump 1 with the main hydroline 13 through the back 12 and the pressure reducing valve 11 valve device 10, the protection device 7, the throttle 6 and the valve control 5, which has a mechanical feedback 4 with the mechanism of regulation 2, the control cavity 15 protection device 7 is connected with the main hydroline 13 through check valve 12 valve device 10, moreover, the control cavity 15 protection device 7 is connected with the discharge of the working fluid in the housings of the motor 3 and the main pump 1 through a special channel, shown in the drawing in the form of hydroline 16 and inductor 17, provided in the cylindrical spool.

The device protection hydrostatic transmission as follows (see drawing).

When working hydrostatic transmission one of the main contours of hydroline 13 becomes a high pressure circuit, the other low pressure, when the pressure of the working fluid in the high pressure circuit main hydroline 13 to the pressure, which is configured oz main hydroline 13 enters the cavity control 15 protection device 7 through the check valve 12 valve device 10, the inductor 9, the working fluid under pressure acts on the end face of the cylindrical valve protection device 7 against the force of the adjustable spring 8, a cylindrical slide valve is moved in the direction of decreasing flow area of the channel hydroline management 14 until the complete cutting off the supply of operating fluid to the mechanism of regulation 2 of the main pump 1, and the working fluid from the cavity of the mechanism of regulation 2 merges into a section of the motor 3 and the main pump 1 through the valve 5, a throttle 6 and the protective devices 8, the force vozdeistviyami regulation mechanism 2 for regulating the drive of the main pump 1 is reduced, regulating the drive of the main pump 1 is committed to its original position, the performance of the main pump 1 is reduced and decreases the pressure of the working fluid in the high pressure circuit main hydroline 13, guaranteed leakage of working fluid from the cavity of the control device 15 protection 7 merge into the housings of the motor 3 and the main pump 1, through a special channel in the cylindrical slide valve, which is shown in Fig.1 in the form of hydroline 16 and inductor 17.

The management of the protection device will improve the reliability and efficiency of data the Torah.

The source of information

1. The negotiation Protocol from 15.02.2002, application No. 2000117565.

Claims

Hydrostatic transmission containing the main adjustable pump control mechanism, the hydraulic motor, the valve is in the feedback control, the throttle, the protection device comprising a cylindrical spool with distribution grooves on the lateral surface, adjustable springs and cavity control put before it by the throttle valve device made in the form of two back and one pressure reducing valves, main and control of hydroline, the main hydroline connects the main adjustable pump with hydraulic motor in a closed circuit, and the control hydroline connects the mechanism of regulation of the main pump with the main hydroline through return and pressure reducing valves valve device, the protection device, the throttle valve control, which has a mechanical feedback mechanism of regulation, characterized in that the control cavity protection device connected with the main hydroline through the check valves of the valve device, and the control cavity protection device has a good busy of the motor and the main pump.

 

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