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JP-2026514216-A - Fan inlet nozzle

JP2026514216AJP 2026514216 AJP2026514216 AJP 2026514216AJP-2026514216-A

Abstract

The inlet nozzle for the fan has a fixed portion (1) and an annular wall (3) connected thereto, on which at least one protruding pressure connection portion (18) is installed. To provide the pressure connection portion (18) in a simpler, more reliable, and lower-cost manner, it is formed integrally with the inlet nozzle. In this way, additional assembly steps for installing the pressure connection portion (18) can be avoided. The pressure connection portion (18) is provided directly during the manufacture of the inlet nozzle. This avoids potential rejections due to manufacturing and assembly costs and assembly processes. No assembly equipment is required that could increase the manufacturing cost of the inlet nozzle. If the pressure connection portion (18) is part of the inlet nozzle, there is no need to provide an additional storage space for the pressure connection portion (18).

Inventors

  • ブリンガー デニス
  • ゲラー マティアス
  • レーラウアー ユルゲン

Assignees

  • ジール・アベッグ エスエー

Dates

Publication Date
20260507
Application Date
20240328

Claims (8)

  1. In a fan inlet nozzle having a fixed portion (1) and an annular wall (3) connected thereto, the annular wall (3) having at least one protruding pressure port (18), An inlet nozzle characterized in that the pressure port (18) is integrally formed with the inlet nozzle.
  2. The inlet nozzle according to claim 1, characterized in that the inlet nozzle, which includes a pressure port (18), is manufactured as an integrally structured injection-molded part.
  3. The inlet nozzle according to claim 1, characterized in that the inlet nozzle, which includes a pressure port (18), is manufactured as a die-cast component with a single integrated structure.
  4. The inlet nozzle according to any one of claims 1 to 3, characterized in that the pressure port (18) has a passage (19) that extends in the direction of the outlet opening (21) or the inlet opening (20).
  5. The inlet nozzle according to any one of claims 1 to 4, characterized in that the pressure port (18) has an outer surface (23) that preferably tapers conically in the direction of the outlet opening (21).
  6. The inlet nozzle according to claim 5, characterized in that the outer surface (23) has two outer surface sections (23a, 23b) having different outer diameters.
  7. The inlet nozzle according to claim 6, characterized in that the outer sections (23a, 23b) transition to each other via radially extending and surrounding shoulders (24).
  8. The inlet nozzle according to any one of claims 1 to 7, characterized in that the transition region (25) in the annular wall (3) is biomechanically designed using the tension triangle method.

Description

The present invention relates to an inlet nozzle (injection nozzle) for a fan, conforming to the preamble portion of claim 1. Often, it is necessary to measure the pressure inside a fan inlet nozzle. For this purpose, the medium flowing through the inlet nozzle, generally air, is drawn in along a certain contour/angle. At least one pressure port (pressure connection) is provided for this purpose, constituting a kind of valve for sensing the pressure of the medium flowing through the inlet nozzle. The flow rate of the medium can be calculated using the pressure. A blind rivet nut with a hose connector is riveted to the annular wall of the inlet nozzle as the pressure port. In further known embodiments, a straight threaded connector is screwed onto a blind rivet nut with a rounded shank. In both cases, an additional installation step is required during the manufacture of the inlet nozzle to secure the pressure port to the annular wall. Installation of the pressure port is not a reliable step because riveting causes several problems. For example, cracks can form in the inlet nozzle in the area of the pressure port. These cracks result from deformation of the inlet nozzle material, which generates strong forces that cause crack formation in the inlet nozzle in the hole area where the pressure port is fixed. Furthermore, because the inlet nozzle is typically curved, the pressure port often does not make full contact with the inlet nozzle's contour. The additional installation process and drilling required to insert the pressure port incurs considerable extra costs. In addition, this complicates installation and makes it prone to errors. This is a perspective view of an inlet nozzle according to the present invention.Figure 1 shows an inlet nozzle according to the present invention, partially in a side view and partially in an axial cross-section.This is an enlarged perspective view of a portion of an inlet nozzle according to the present invention, which has a pressure port.This is a cross-sectional view through the pressure port shown in Figure 3 in the enlarged view. The inlet nozzle is provided for a fan, preferably a radial fan. The inlet nozzle has a circular fixed flange 1 in an exemplary embodiment. Depending on the intended use and design of the fan, the fixed flange 1 may further have a different shape, such as an elliptical or angular shape. For example, multiple fixing openings 2 for screws or the like, which can be used to fix the inlet nozzle to a wall, are advantageously provided uniformly distributed around the outer circumference of the fixed flange 1. The fixed flange 1 preferably surrounds the annular wall 3, which is formed integrally with the fixed flange 1. The fixed flange 1, located in the radial plane, surrounds the inlet opening 4 (Figure 2), through which the fan impeller draws in air. This air flows through the inlet nozzle and reaches the fan impeller through the outlet opening 5 in a known manner. The inlet opening 4 is bounded by a conical annular wall 6 that tapers toward the outlet opening 5. The wall 6 connects to an annular intermediate wall 7 adjacent to the conical wall 6 at an obtuse angle (Figure 2). The conical wall 6 is adjacent to the fixed flange 1 at a larger obtuse angle than the intermediate wall 7 (Figure 2). In the axial direction, the conical wall 6 is advantageously smaller than the intermediate wall 7, and its axial width 8 is, for example, 2 to 5 times wider than the axial width 9 of the conical wall 6. The intermediate wall 7 transitions at an obtuse angle to the adjacent transition wall 10 at the end wall 11. The transition wall 10 is designed to be conical and has a larger obtuse angle with respect to the fixed flange 1 than the intermediate wall 7. As can be seen in the axial cross-section, the end wall 11 is cylindrical and therefore perpendicular to the transition wall 10. Walls 6, 7, and 10 each have conical inner surfaces 12-14. The end wall 11 has a cylindrical inner surface 15, whose inner diameter widens, preferably continuously, near the outlet opening 5 (Figure 4). The outer surface 16 of the end wall 11 extends cylindrically over the overall axial width 17. Due to the aforementioned design, the wall thickness of the end wall 11 decreases towards the exit opening 5. Advantageously, the wall thickness decreases along the axial width 17a. The axial width 17a is advantageously less than half the axial width 17 of the end wall 11. The annular wall 3 is provided with at least one pressure port 18, which is located on the outer surface of the annular wall 3 and extends outward. As shown in Figure 1, two or more pressure ports 18 may be provided in the annular wall 3. The pressure port 18 is used to determine the amount of medium flowing through the inlet nozzle to the fan. Using the pressure port 18, the pressure of the medium flowing through the inlet nozzle can be determined by known methods, and the flow rate can be calculated therefrom. The pressure p