Compressor and turbo chiller
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Solution Overview
Problem
Existing turbo chillers face challenges in achieving a compact layout during storage or transportation due to non-uniform flow distribution in the circumferential direction, particularly when multiple units are stacked, and existing designs do not adequately optimize the compressor's drive mechanism placement.
Innovation Solution
A compressor design featuring a rotary shaft with impellers, a ring-shaped chamber, movable vanes, and a drive mechanism positioned 90° from the suction nozzle, with an inclined suction nozzle and guide blades that increase flow rates to the opposite side, ensuring uniform flow distribution and a compact layout.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the drive mechanism is installed at the position of 180° from the suction nozzle to reduce flow distribution, then the flow distribution is improved, but the device layout becomes less compact
Solution Approach 1:
The suction nozzle is designed with an inclined shape rather than a symmetric cylindrical form. The inclined surface is positioned on the side opposite to the drive mechanism, creating an asymmetric geometry that redirects fluid flow toward that side, thereby compensating for the space-saving placement of the drive mechanism at 90° from the suction nozzle
Solution Approach 2:
The inclined surface is specifically positioned on one side of the suction nozzle (the side opposite to the drive mechanism) rather than uniformly distributing features around the nozzle. This localized geometric modification creates a flow bias toward the opposite side, compensating for the non-180° placement of the drive mechanism
2Volume of moving object
If the drive mechanism is positioned at 90° from the suction nozzle to achieve compact layout, then the device layout becomes more compact, but the flow distribution uniformity deteriorates
Solution Approach 1:
The suction nozzle employs asymmetric geometry with an inclined surface positioned on the side opposite to the drive mechanism. This asymmetric design creates a flow redirection effect that compensates for the 90° placement of the drive mechanism, maintaining flow distribution uniformity despite the compact layout
Solution Approach 2:
The inclined surface of the suction nozzle pre-compensates for the flow distribution imbalance that would result from placing the drive mechanism at 90°. By designing the nozzle geometry to favor flow toward the opposite side before the fluid enters the chamber, the system counteracts the potential negative effect of the compact drive mechanism placement
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The optimized compressor arrangement allows for a more compact turbo chiller layout and improves flow distribution uniformity, enhancing the overall performance and efficiency of the system.
Implementation Method 1
the suction nozzle is inclined toward the other side out of one side and the other side in the circumferential direction in the chamber such that the flow rate of the fluid to the other side increases
Data Source
AI summary
A compressor (2) characterized by being equipped with: a rotary shaft (12); multiple impellers attached to the rotary shaft; a main flow path that guides a fluid from the prior-stage impeller to the latter-stage impeller; a chamber (31) that forms a circle centered around the axial line and connects to the main flow path; a suction nozzle (32) that guides the fluid from the outer circumferential side toward the inner circumferential side in the chamber; multiple movable vanes provided in the main flow path at intervals in the circumferential direction of the axial line and capable of moving and thereby adjusting the flow volume of the fluid passing through the main flow path; and a drive mechanism (42) that is provided at one side in the circumferential direction of the suction nozzle (32) within the chamber (31), and that changes the angle of the multiple movable vanes. In addition, of the one side and the other side in the circumferential direction within the chamber (31), the suction nozzle (32) is inclined toward the other side so as to increase the flow volume of the fluid toward the other side.