Connecting structure for inlet guide vane and shell of centrifugal machine

Abstract

The utility model provides a connecting structure for an inlet guide vane and a shell of a centrifugal machine. The connecting structure comprises the shell and the inlet guide vane which are arranged at an inlet section of the centrifugal machine, the shell comprises an upper half part, and the upper half part is matched with the inlet guide vane; the upper half part is of a structure with an outer circle and an inner polygon, the inner wall of the upper half part is divided into a plurality of matching surfaces according to the polygon structure, and each matching surface is correspondingly provided with one inlet guide vane; the bottom surface of the inlet guide vane is a plane, and the matching surface is a plane; the bottom surface of the inlet guide vane is in plane fit with the matching surface; the matching surface of the inlet guide vane and the shell is changed into the plane, so that the design and machining difficulty of the inlet guide vane is remarkably reduced, the assembly process is simplified, and it is ensured that gaps after assembly are small, uniform and easy to control.

Description

Technical Field

[0001] This utility model relates to the field of centrifuge technology, and in particular to a connection structure between the centrifuge inlet guide vane and the shell. Background Technology

[0002] Centrifuges, widely used in industrial applications, are highly regarded for their efficient fluid separation and processing capabilities. Within the centrifuge's structure, the inlet guide vanes and its casing are key components, their design and performance directly impacting the centrifuge's aerodynamic efficiency and flow regulation capabilities.

[0003] Existing centrifuge inlet guide vanes 101 and their housing 102 typically employ a curved surface 103 design (e.g.) Figure 1-2 While this structure can meet aerodynamic performance requirements to a certain extent, it also presents several problems. First, the sides and tail of the inlet guide vane, as well as its mating section with the shell, are all curved surfaces. This complex three-dimensional curved surface fit is difficult to design, and the clamping and machining processes are extremely cumbersome, increasing manufacturing costs and time. Second, due to the complexity of the curved surface fit, gaps easily appear after the inlet guide vane has rotated a certain angle, and the size of these gaps is difficult to control uniformly. This uneven gap will have a significant negative impact on airflow regulation, reducing the centrifuge's operating efficiency and performance stability.

[0004] Furthermore, existing inlet guide vane housings typically require grooves to accommodate the impeller's circular structure. This design not only increases the complexity of the housing but may also lead to a reduction in inlet aerodynamic performance, further impacting the overall performance of the centrifuge.

[0005] In practical applications, gear centrifuges have long been recognized by the market and widely used in various industries such as textiles, transportation, aerospace, pharmaceuticals, and medicine due to their advantages such as high speed, large gas volume, pure and oil-free exhaust gas, simple structure, convenient maintenance, and stable performance. However, the speed of gear centrifuges is usually fixed, and flow rate adjustment mainly relies on inlet guide vanes. Most existing inlet guide vanes and shell structures adopt a circular arc surface design. Although this design matches the circular structure of the impeller, it also brings high difficulty in design, clamping, and machining assembly. Moreover, after assembly, problems such as excessive or uneven gaps are prone to occur, which seriously affect the performance and reliability of the centrifuge. Utility Model Content

[0006] The present invention aims to provide a connection structure between the centrifuge inlet guide vane and the shell, so as to solve the problems of complex design, difficult processing, uneven assembly gap and poor aerodynamic performance in the prior art.

[0007] To solve the above-mentioned technical problems, this utility model provides a connection structure between a centrifuge inlet guide vane and a housing, including a housing and an inlet guide vane disposed in the inlet section of the centrifuge; the housing includes an upper half, which cooperates with the inlet guide vane;

[0008] The upper part is a polygonal structure with an outer circle. The inner wall of the upper part is divided into multiple mating surfaces according to the polygonal structure. Each mating surface is equipped with an inlet guide vane.

[0009] The bottom surface of the inlet guide vane is a plane, and the mating surface is a plane; the bottom surface of the inlet guide vane and the mating surface are in planar contact.

[0010] In a preferred embodiment, the housing includes a lower half for transitioning to the impeller inlet;

[0011] The lower half is a transition section from polygon to circle, where the transition section gradually transitions from polygon to circle.

[0012] In a preferred embodiment, the transition segment has a smooth curved surface.

[0013] In a preferred embodiment, both the upper and lower surfaces of the inlet guide vane are planar.

[0014] In a preferred embodiment, the inlet guide vane has an elliptical profile.

[0015] In a preferred embodiment, the upper part is a hexagonal structure with an outer circle.

[0016] Compared with the prior art, the technical solution of this utility model has the following beneficial effects:

[0017] 1. By designing the mating surfaces of the housing and the inlet guide vane as planes, the design and manufacturing difficulty is significantly reduced, while the assembly process is simplified, ensuring that the gap after assembly is small and uniform, and easy to control.

[0018] 2. The smooth curved surface design of the polygonal to circular transition section ensures that the airflow smoothly transitions from the polygonal flow channel of the inlet guide vane to the circular flow channel of the impeller inlet, avoiding the decrease in aerodynamic performance caused by abrupt shape changes.

[0019] 3. The upper and lower surfaces of the inlet guide vanes are both flat, and the outline is elliptical. This design further optimizes the fluid flow characteristics and improves the overall performance of the centrifuge.

[0020] 4. The structural design of this utility model avoids the grooves required by traditional shells, reducing the negative impact on inlet aerodynamic performance. Attached Figure Description

[0021] Figure 1 A schematic diagram showing the use of an arc-shaped fit between the inlet guide vane and the casing structure of an existing centrifuge;

[0022] Figure 2 A cross-sectional view of the existing centrifuge inlet guide vanes and shell structure using an arc surface fit;

[0023] Figure 3 This is a schematic diagram showing the fit between the inlet guide vane and the upper part of the housing in a preferred embodiment of the present invention;

[0024] Figure 4 This is a top view of the fit between the inlet guide vane and the upper part of the housing in a preferred embodiment of the present invention;

[0025] Figure 5 This is a schematic diagram of the assembly of the inlet guide vane and the housing in a preferred embodiment of the present invention;

[0026] Figure 6 This is a schematic diagram of the internal structure of the shell in a preferred embodiment of the present invention;

[0027] Figure 7 This is a cross-sectional view of the inlet guide vane and the housing in a preferred embodiment of the present invention.

[0028] Explanation of reference numerals in the attached drawings: 1. Shell; 11. Upper part; 111. Mating surface; 12. Lower part; 121. Hexagon; 122. Circular; 2. Inlet guide vane; 21. Bottom surface; 3. Plane. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0030] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0031] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed", "equipped with", "sleeved / connected", "connected", etc., should be interpreted broadly. For example, "connection" can be a wall-mounted connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0032] refer to Figures 3-7 This embodiment provides a connection structure between a centrifuge inlet guide vane and a housing, including a housing 1 and an inlet guide vane 2 disposed in the centrifuge inlet section; the housing 1 includes an upper part 11, which mates with the inlet guide vane 2; the upper part 11 has an outer circle and an inner polygonal structure, and the inner wall of the upper part 11 is divided into multiple mating surfaces 111 according to the polygonal structure, each of the mating surfaces 111 corresponding to one inlet guide vane 2 (e.g., ...). Figure 3 The bottom surface 21 of the inlet guide vane 2 is a plane 3, and the mating surface 111 is a plane 3; the bottom surface 21 of the inlet guide vane 2 and the mating surface 111 are in contact with each other as plane 3 (e.g., Figure 4 This ensures that the gap between the inlet guide vane 2 and the housing 1 is pressure-equal and easy to control after assembly.

[0033] In this embodiment, the upper part 11 is an outer circle with an inner hexagonal structure (e.g., Figure 4 It should be noted that the upper part 11 of the shell 1 is not necessarily hexagonal; it can be various polygons, with the number of guide vanes corresponding to the number of sides.

[0034] The housing 1 includes a lower half 12, which serves as a transition to the impeller inlet; the lower half 12 is a polygonal-to-circular transition section (e.g., Figure 6 The transition section gradually transitions from a polygon to a circle; that is, one end of the lower half 12 is hexagonal 121, the other end is circular 122, and the transition is gradual in the middle. The transition section has a smooth curved surface, ensuring that the airflow smoothly transitions from the hexagonal flow channel of the inlet guide vane 2 to the circular flow channel of the impeller inlet. This smooth transition design avoids the aerodynamic performance degradation caused by abrupt shape changes, thus improving the aerodynamic efficiency of the centrifuge.

[0035] The upper and lower surfaces of the inlet guide vane 2 are both planes 3, and the outline of the inlet guide vane 2 is elliptical. This design not only reduces the difficulty of manufacturing but also optimizes the fluid flow characteristics, further improving the performance of the centrifuge.

[0036] The connection structure between the centrifuge inlet guide vane 2 and the housing 1 provided in this embodiment avoids complex three-dimensional arc surface matching, simplifies the processing and assembly process, and ensures a smooth airflow transition through the smooth transition section design, avoiding the aerodynamic performance degradation caused by the groove design.

[0037] This embodiment significantly reduces the difficulty of processing and assembly by using a plane 3 to connect the mating surface 111 of the shell 1 and the bottom surface 21 of the inlet guide vane 2, while improving the aerodynamic performance and operating efficiency of the centrifuge, demonstrating significant practicality and innovation.

[0038] The above description is only a preferred embodiment of the present utility model, but the design concept of the present utility model is not limited thereto. Any non-substantial modifications made to the present utility model by those skilled in the art within the scope of the technology disclosed in the present utility model using this concept shall be deemed as an infringement of the protection scope of the present utility model.

Claims

1. A connection structure of a centrifuge inlet guide vane and a casing, characterized by: The shell includes an upper half and an inlet guide vane arranged at the inlet section of the centrifugal machine; the upper half cooperates with the inlet guide vane; The upper half is a circular polygon structure, and the inner wall of the upper half is divided into a plurality of cooperating surfaces according to the polygon structure, and each cooperating surface is provided with an inlet guide vane; The bottom surface of the inlet guide vane is a plane, and the cooperating surface is a plane; the bottom surface of the inlet guide vane is flatly connected with the cooperating surface.

2. The connection structure of the inlet guide vane and the housing of a centrifuge according to claim 1, characterized in that: The shell includes a lower half for transition to the impeller inlet; The lower half is a polygon transition section, and the transition section gradually transitions from a polygon to a circle.

3. The connection structure of the inlet guide vane and the housing of the centrifuge according to claim 2, characterized in that: The transition section has a smooth curved surface.

4. The connection structure of the inlet guide vane and the housing of a centrifuge according to claim 1, characterized in that: The upper surface and the lower surface of the blade of the inlet guide vane are both planes.

5. The connection structure of the inlet guide vane and the housing of a centrifuge according to claim 3, characterized in that: The profile of the inlet guide vane is an elliptical shape.

6. The connection structure of the inlet guide vane and the housing of a centrifuge according to claim 1, characterized in that: The upper half is a circular hexagon structure.

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