Selection of pump coupling
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For pump couplings, is a spline coupling better or a pin coupling better?
Plum blossoms have good toughness, making them suitable for long-term use. The downside is poor impact resistance, and the plum blossom is prone to damage. Devices with good impact resistance that are easy to restart repeatedly or under heavy load, when shut down. The downside is that the coupling body is prone to damage. For reference.
By default, we use three-claw types for capacities below 55KW and pin types for capacities above 55KW
For the convenience of spare parts, we switched to pin connectors altogether in the past. Plum blossom elastic blocks require less precision in terms of alignment and are mostly used in small pumps. But it’s not convenient to buy spare parts, as there are too many models. Now I’m used to using diaphragms.
Plum blossoms have good toughness, making them suitable for long-term use. The downside is poor impact resistance, and the plum blossom is prone to damage. Devices with good impact resistance that are easy to restart repeatedly or under heavy load, when shut down. The downside is that the coupling body is prone to damage. For reference.
A reminder from the design institute: Nowadays, most design institutes use disc-type types with extended sections. Although plum blossoms do not require high alignment, they transmit low torque. The toughness of the pin is lower than that of the disc, but better than that of the plum blossom shape.
Compared to pin connectors, these two are better than plum blossom connectors.
Plum blossoms have good toughness, making them suitable for long-term use. The downside is poor impact resistance, and the plum blossom is prone to damage. Devices with good impact resistance that are easy to restart repeatedly or under heavy load, when shut down. The downside is that the coupling body is prone to damage. For reference.
The pin is great! For two couplings of the same size, the price of the pin is slightly higher.