Integrated electro-hydraulic unit

An integrated electro-hydraulic unit comprising:

• an electric machine including a winding, a stator, and a shaft;
• a hydraulic machine including a rotary working group and configured to rotate around a central axis, and a pair of working ports configured to receive a working fluid;
• and
• a shared casing for the electric and hydraulic machines,
• wherein the rotary working group is configured to rotate in a first rotational direction about the central axis,
• wherein the hydraulic machine is configured to generate a cooling flow of the working fluid, the cooling flow transferred from the rotary working group separate from the pair of working ports,
• wherein the casing is configured to accommodate the cooling flow, and the electric machine is configured for immersion cooling with the cooling flow,
• wherein the pair of working ports are defined in a valve plate, and wherein the valve plate further comprises a third port configured to receive the cooling flow from the rotary working group in a first rotational direction,
• wherein the third port does not radially overlap either of the pair of working ports relative to the central axis,
• wherein the rotary working group is configured to rotate in a second rotational direction about the central axis opposite from the first rotational direction, wherein the valve plate further comprises a fourth port configured to receive the cooling flow from the rotary working group in the second rotational direction,
• further comprising a check valve in fluid communication with the third port, wherein the check valve is configured to prevent flow from the rotary working group in the second rotational direction.

An integrated electro-hydraulic unit comprising:

• an electric machine including a winding, a stator, and a shaft;
• a hydraulic machine including a rotary working group and configured to rotate around a central axis, and a pair of working ports configured to receive a working fluid;
• and
• a shared casing for the electric and hydraulic machines,
• wherein the rotary working group is configured to rotate in a first rotational direction about the central axis,
• wherein the hydraulic machine is configured to generate a cooling flow of the working fluid, the cooling flow transferred from the rotary working group separate from the pair of working ports,
• wherein the casing is configured to accommodate the cooling flow, and the electric machine is configured for immersion cooling with the cooling flow,
• wherein the pair of working ports are defined in a valve plate, and wherein the valve plate further comprises a third port configured to receive the cooling flow from the rotary working group in a first rotational direction,
• wherein the third port does not radially overlap either of the pair of working ports relative to the central axis,
• wherein the rotary working group is configured to rotate in a second rotational direction about the central axis opposite from the first rotational direction, wherein the valve plate further comprises a fourth port configured to receive the cooling flow from the rotary working group in the second rotational direction,
• wherein a center of the third port is prior to a top dead center position in the second rotational direction and is within 25 degrees of the top dead center position.