Rotary gas distribution valve
By incorporating a labyrinth seal in the rotary valve and utilizing the kinetic energy of the gas lost through eddy currents, the problem of reduced sealing performance caused by wear on the rotor and stator sealing surfaces is solved, achieving both excellent sealing performance and cost reduction.
CN117231778BActive Publication Date: 2026-06-30SOUTHERN UNIVERSITY OF SCIENCE AND TECHNOLOGY
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- SOUTHERN UNIVERSITY OF SCIENCE AND TECHNOLOGY
- Filing Date
- 2023-09-19
- Publication Date
- 2026-06-30
AI Technical Summary
Technical Problem
During use, the sealing effect of the existing rotary valve decreases due to wear on the sealing surfaces between the rotor and stator, which affects the performance of the refrigeration unit.
Method used
A first labyrinth seal is installed between the rotor sealing surface and the stator sealing surface. The first labyrinth seal obstructs gas flow and utilizes eddy currents to generate kinetic energy loss to achieve a good seal, avoiding tight contact between the sealing surfaces and reducing material and processing requirements.
Benefits of technology
It improves the sealing effect of the rotary valve, prolongs the sealing durability, reduces costs, and prevents insufficient air supply or return.
✦ Generated by Eureka AI based on patent content.
Smart Images
Figure CN117231778B_ABST
Abstract
This invention provides a rotary valve comprising a stator, a motor, and a rotor. The stator has a stator sealing surface with an annular first groove. The stator also has a main inlet for gas passage, a gas supply port, and a gas return port. The rotor includes a body and an annular first protrusion. One end of the body has a rotor sealing surface, and the first protrusion is connected to the rotor sealing surface. The first protrusion is disposed in the first groove to form a first labyrinth seal. The body has mutually separated gas return and gas supply channels. The motor drives the rotor to rotate, allowing the rotor to switch between a gas supply state and a gas return state. The rotary valve provided by this invention can maintain a good seal for a relatively long time, and its manufacturing difficulty and cost are both low.
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