| 摘要 |
A pulsator for milking machines has two diaphragms connected by a rod with each diaphragm dividing a pressure chamber into a processing space and a damping space. The damping spaces communicate through a channel that is provided with a throttle. The processing spaces are connected either to a source of vacuum or to the atmosphere. A switchover is attached to the rod and connects lines leading to the pulsation spaces of milking containers either to the atmosphere or to a source of vacuum. A main line is provided with a throttle. The throttles in the communicating channel and in the main line are detoured by bypasses provided with chokes that can be vacuum-activated through control channels. To improve the known pulsator by eliminating the sensitive hoses and timers and to allow adjustment of the duration of the stimulation phase with no need for a timer, the control channels are always in communication with one of the control chambers in a control disk, one chamber constantly communicating with the vacuum source and the other chambers subject to atmospheric pressure. The disk can be rotated by a transmission, which is driven by the rod as it travels back and forth, in such a way that the control channels are connected either to the control chamber that is subject to vacuum or to one of the control chambers that are subject to atmospheric pressure. |
