As for a formed stainless steel gear pump, its unloading groove has been processed, and its gear teeth accuracy, bearing accuracy, and device accuracy have been confirmed. Stainless steel gear pumps sometimes still produce loud noise, especially when used as exhaust pumps in vacuum oil filters. Due to the need to overcome the suction force of the vacuum when draining the oil from the vacuum tank, it is more difficult for stainless steel gear pumps to drain oil. If not handled properly, significant noise may occur. When the stainless steel gear pump in the vacuum oil filter produces significant noise, the following reasons can be identified and countermeasures taken:
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1. The oil suction pipeline or filter in front of the stainless steel gear pump is partially blocked. At this moment, it can be seen from the oil pipe that there is very little oil being sucked in. Insufficient oil suction will cause dry grinding and cavitation, making loud noise. At this moment, the blockage point should be identified, dirt should be removed, and oil suction should be smooth.
2. The suction pipe in front of the stainless steel gear pump sucks in air. At this point, bubbles can be seen from the suction pipe, and bubbles can also be seen from the discharged oil. The stainless steel gear pump will produce cavitation noise after inhaling air. The important drainage parts include various valves in front of the stainless steel gear pump, the inlet flange sealing ring of the pump, and the self tightening skeleton oil seal of the pump. After searching, they should be quickly removed. Sub pump
