Can a variable frequency drive be used for a vertical reciprocating vacuum pump equipped with a shaft-end pump?
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Can a vertical reciprocating vacuum pump with a shaft coupling be equipped with an inverter? If possible, will low frequencies have an impact on the lubrication system and cause vacuum pump failures? If there is an impact, what is the minimum frequency in Hz required to meet the operating requirements of the vacuum pump?
An inverter can be used to control the speed of vertical reciprocating vacuum pumps equipped with shaft-mounted pumps, but it is indeed necessary to pay attention to the potential impact of low-frequency operation on the lubrication system. When operating at low frequencies, the pump’s speed decreases, which may lead to an unstable lubrication film or insufficient lubrication, thereby causing failures in the vacuum pump. Therefore, it is important to ensure that it operates at a speed not lower than the minimum required for the pump to function properly. Generally, the minimum frequency should be maintained at over 50% of the pump’s rated speed, but the specific frequency must be determined based on the vacuum pump’s model and the recommendations in its manual. It is recommended to consult the vacuum pump manufacturer to obtain the accurate operating frequency range. .