Screw Compressor Radial Discharge Layout for Lower Pressure Loss
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Solution Overview
Problem
The existing screw compressors suffer from fluid pressure loss due to the discharge port and outlet being spaced apart in the axial direction, causing the fluid to change direction from radial to axial, resulting in pressure loss during discharge.
Innovation Solution
The case outlet is positioned close to the discharge port in the axial direction, allowing the fluid to flow radially without significant directional change, and is sealed to prevent leakage, with a straight connection passage and silencer to reduce noise and pressure loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the discharge cover is interposed between the discharge port and the outlet, then the discharge port and outlet can be structurally separated, but the fluid must change direction from radial to axial causing pressure loss
Solution Approach 1:
The invention extracts the discharge cover from the discharge path and repositions it to the radial direction. The discharge port is formed directly in the casing wall, eliminating the need for the discharge cover to be interposed between the discharge port and outlet. This allows the outlet to be positioned in the radial direction, enabling the fluid to flow radially outward without changing direction, thus resolving the pressure loss issue while maintaining structural separation.
2Device complexity
If the outlet is positioned in the axial direction, then the discharge structure is simplified, but the fluid changes direction from radial to axial resulting in pressure loss
Solution Approach 1:
Instead of positioning the outlet in the axial direction as in conventional designs, the invention inverts the approach by positioning the outlet in the radial direction. This allows the fluid to flow radially outward from the compression chamber directly to the outlet without changing direction, eliminating the pressure loss associated with directional changes while maintaining a simplified discharge structure.
3Volume of moving object
If the discharge port and outlet are spaced apart in the axial direction, then the compression chamber can be properly formed, but the fluid experiences pressure loss during discharge
Solution Approach 1:
The invention resolves the contradiction by changing the spatial dimension of the outlet positioning from axial to radial. The outlet is positioned in the radial direction at a location corresponding to the outer periphery of the screw rotor in the radial direction. This allows the discharge port and outlet to be appropriately spaced in the axial direction for proper compression chamber formation, while simultaneously enabling radial flow path that minimizes pressure loss.
Data Source
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AI summary
A screw compressor includes a screw rotor, a gate rotor, and a casing. The screw rotor, the gate rotor, and the casing form a compression chamber that compresses a fluid. A case outlet is formed in a case outer wall of the casing outside in a radial direction. A discharge port is formed in a portion of the casing facing the compression chamber. The discharge port includes a front end on a front side in an axial direction and a rear end on a rear side in the axial direction. The case outlet is located between a front position away from a front end toward the front side in the axial direction by a gate radius and a rear position away from a second end toward the rear side in the axial direction by the gate radius.