| 摘要 |
PURPOSE:To improve the lubricity by forming a uniform-pressure hole between an intake chamber and an oil sump chamber on one compression element side so as to treat the blow-bye gas and allowing two oil sump chambers to communicate with each other through a uniform-pressure oil pipe and certainly feeding the lubricating oil which returns to one intake chamber, to each oil pump chamber. CONSTITUTION:Each pressure in an intake chamber 107 and an oil sump chamber 104 of the first compression element 1 is made equal through a uniform-pressure hole 108, and blow-bye gas is treated in the first compression element 1. Further, the first oil sump chamber 104 and the second oil sump chamber 204 are allowed to communicat with each other through a uniform-pressure oil pipe 9, and also a pressure difference is generated betwen the first and the second oil sump chambers 104 and 204 by the pressure difference between the first and the second intake chambers 103 and 203. As a result, the following relation is formed; the pressure in the second intake chamber 203 < pressure in the second oil sump chamber 204 < pressure in the first oil sump chamber 104 < pressure in the first intake chamber 103. Then, the libricating oil which returns to the first intake chamber 103 is supplied to the first and the second oil sump chambers 104 and 204, and thus abnormal wear-out of sliding parts can be prevented. |
