End cover type bearing adjustable positive pressure device

The invention discloses an end cover type bearing adjustable positive pressure device, which comprises a bearing inner cover, a bearing outer cover and a stator high pressure area, and is characterized in that the stator high pressure area is connected with the bearing inner cover through a bearing inner cover positive pressure ventilation pipeline; the bearing inner cover positive pressure ventilation pipeline comprises a first section of bearing inner cover positive pressure ventilation pipeline, a second section of bearing inner cover positive pressure ventilation pipeline and a third section of bearing inner cover positive pressure ventilation pipeline; the second-section bearing inner cover positive pressure ventilation pipeline is located on the outer side of the machine base end plate, and the first-section bearing inner cover positive pressure ventilation pipeline and the third-section bearing inner cover positive pressure ventilation pipeline are located on the inner side of the machine base end plat