Hydrostatic Drive With Energy Storage

摘要

A hydrostatic drive has a hydrostatic pump (3) driven by a drive motor (2) and connected in a closed circuit with a hydrostatic motor (4). The closed circuit is formed by a first hydraulic connection (6a) and a second hydraulic connection (6b). Each of the hydraulic connections (6a, 6b) can form the high-pressure side or the low-pressure side of the closed circuit. A high pressure accumulator device (20) can be connected with the respective high-pressure side hydraulic connection (6a, 6b) and, simultaneously, the respective low-pressure side hydraulic connection (6b, 6a) can be connected with a hydraulic balancing device (30). A valve device (50) is provided for this simultaneous connection. The valve device (50) is a hydraulically controlled shuttle valve device (51) connected to the two hydraulic connections (6a, 6b), the high pressure accumulator device (20) and the hydraulic balancing device (30). The shuttle valve device (30) has a high pressure accumulator path (51a) and a hydraulic balancing path (51b), and is in communication with the two hydraulic connections (6a, 6b) of the closed circuit.

主权项

1. A hydrostatic drive comprising:
a hydrostatic pump driven by a drive motor and connected in a closed circuit with a hydrostatic motor, wherein the hydrostatic motor is in a drive connection with a consumer, wherein the closed circuit is formed by a first hydraulic connection and a second hydraulic connection, and wherein each of the first and second hydraulic connections can form a high-pressure side or a low-pressure side of the closed circuit; a high pressure accumulator device connectable with the high-pressure side hydraulic connection for the accumulation of energy and for the discharge of energy wherein simultaneously the low-pressure side hydraulic connection is connectable with a hydraulic balancing device; and a valve device for control of the simultaneous connection of the high pressure accumulator device with the high-pressure side hydraulic connection and the hydraulic balancing device with the low-pressure side hydraulic connection, wherein the valve device is a hydraulically controlled shuttle valve device connected to the first and second hydraulic connections, the high pressure accumulator device, and the hydraulic balancing device, and wherein the shuttle valve device includes a high pressure accumulator path and a hydraulic balancing path, and is in communication for actuation with the first and second hydraulic connections of the closed circuit.