Gas Control Device With Closed-Space Pressure Buffering
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Solution Overview
Problem
In gas control devices with multiple pumps connected in series, the pump casing on the low-stage side is prone to damage due to increased pressure differences, leading to potential size and weight increases when thicker casings are used for enhanced pressure resistance.
Innovation Solution
A gas control device design that includes a first and second pump casing connected by a connection casing forming a closed space, where at least one outer wall of each pump faces this space, allowing communication between discharge and suction holes via the closed space, thereby reducing pressure differences and preventing damage to the low-stage pump.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the thickness of the pump casing on the low-stage side is increased to increase pressure resistance, then the strength and reliability are improved, but the size and weight of the pump are increased
Solution Approach 1:
A buffer chamber is introduced as an intermediary component between the low-stage pump and the high-stage pump. This buffer chamber absorbs pressure fluctuations and reduces the pressure difference that the low-stage pump casing must withstand, thereby allowing the use of thinner, lighter casing material while maintaining structural integrity and pressure resistance.
2Power
If multiple pumps are connected in series to increase discharge pressure, then the power and productivity are improved, but the pressure difference across the low-stage pump increases causing reliability to worsen
Solution Approach 1:
The buffer chamber serves as a mediator that decouples the pressure relationship between series-connected pumps. By introducing this intermediate chamber, the system achieves high discharge pressure through series connection while the buffer chamber absorbs the excessive pressure difference, preventing damage to the low-stage pump and maintaining system reliability.
Solution Approach 2:
The buffer chamber provides beforehand cushioning by pre-absorbing pressure fluctuations and creating a pressure buffer zone. This cushioning effect protects the low-stage pump from sudden pressure spikes and excessive pressure differences before they can cause damage, enabling reliable series pump operation.
Data Source
AI summary
A gas control device includes a first pump, a second pump, and a connection casing. The first pump includes a first pump casing, a first suction hole, and a first discharge hole. The first pump casing has a plurality of outer walls. The second pump includes a second pump casing, a second suction hole, and a second discharge hole. The connection casing has a first opening and a second opening. The connection casing forms, together with the first pump casing and the second pump casing, a first closed space. The second discharge hole and the first suction hole communicate with each other via the first closed space. The first pump and the second pump are connected in series with each other. The outer wall in which first suction hole is provided faces the first closed space.