Axial fan blade end cover pressing mechanism of condensation fan

Abstract

The utility model provides an axial fan blade pressing end cover mechanism of a condensation fan, which is used for rotationally connecting a fan blade device at an end cover and comprises an end cover body, the end face of the end cover body corresponding to the connecting side of the fan blade device is arranged as a connecting side, the end cover body is provided with a mounting cavity at the side end face of the connecting position in a sinking manner, and the mounting cavity is of a cylindrical cavity structure. An installation boss is further arranged at the position, corresponding to the center of the bottom face of the cylindrical cavity structure, of the end cover connecting side end face in a protruding mode, a bearing chamber is formed between the cylindrical cavity structure and the installation boss, and a connecting bearing of the fan blade device and the end cover body are installed in the bearing chamber in a matched mode. On the basis that the installation effect is guaranteed, the machining technology is effectively simplified through the structural design, stamping machining is not needed, the hidden crack risk generated in the end cover machining process is avoided, and the production and manufacturing cost is further saved.

Description

Technical Field

[0001] The utility model relates to the technical field of condensing fans, in particular to an axial compression blade end cover mechanism of a condensing fan. Background Art

[0002] In the processing and design of the condensing fan, the fan blade assembly includes a rotating shaft and a fan blade. Usually, the fan blade assembly is arranged inside the end cover, and the fan blade is driven to rotate by the rotating shaft. The fan blade and the rotating shaft can be fixed by key connection or other methods. A bearing chamber is usually designed on the end cover for matching the installation of the bearing. The inner ring of the bearing is connected to the rotating shaft of the fan blade assembly, and the outer ring of the bearing is matched with the inner wall of the bearing chamber.

[0003] In existing condensing fans, the bearing chamber of the end cover is usually designed to be stamped to form a boss protruding toward the installation side during production and processing. During assembly, after O-rings, gaskets and other connecting accessories are pressed into the circumferential position of the boss, the bearing is connected and matched with the boss.

[0004] However, in the processing of this structure, the end cap body is first processed, and then the boss is punched to one side using a stamping device. In the process of stamping the boss, it is bound to cause a certain impact on the end cap body. The wall thickness at the position where the boss is formed is relatively thin, there is a risk of hidden cracks, and the safety and reliability are questionable. Utility Model Content

[0005] The technical problem to be solved by the utility model is: in order to overcome the deficiencies of the prior art, the utility model provides an axial compression blade end cover structure of a condensing fan, rationally designs the bearing chamber for installing the blade and the end cover, simplifies the processing process of the bearing chamber while ensuring the installation effect, makes the bearing chamber easy to process, and reduces the risk of hidden cracks that may exist in the end cover during the processing.

[0006] The technical solution adopted by the utility model to solve its technical problems is: a condensing fan axial pressure fan blade end cover mechanism, which is used for rotating and connecting the fan blade device at the end cover, including an end cover body, the end face of the end cover body corresponding to the connection side of the fan blade device is set as the connection side, the end cover body is sunken at the end face of the connection side to provide an installation cavity, the installation cavity is a cylindrical chamber structure, and the end face of the connection side of the end cover body corresponds to the bottom surface of the cylindrical chamber structure. A mounting boss is also protruded at the center position of the bottom surface, the cylindrical chamber structure and the mounting boss form a bearing chamber, and the bearing chamber is provided for the connection bearing of the fan blade device to be installed in coordination with the end cover body.

[0007] In the above scheme, compared with the traditional stamping structure, the bearing chamber of the present application is designed to be sunken, which can be used for normal installation of the fan device. The sunken structural design can be cast during casting without stamping, effectively avoiding the risk of hidden cracks caused by stamping, and improving the safety and reliability of the end cover.

[0008] Furthermore, the end cover body and the mounting cavity are integrally cast and do not require stamping, which effectively reduces the production process and can effectively cut down on production costs.

[0009] Preferably, the mounting boss, the end cover body and the mounting cavity are integrally cast, which can further reduce production processes and cut production costs.

[0010] Furthermore, the center of the connecting side end face of the mounting boss is concave with a countersunk hole, and the rotating shaft end face of the fan device is matched with the countersunk hole. The countersunk hole can provide a positioning point for the positioning and installation of the rotating shaft of the fan device, facilitating the coaxial positioning and assembly of the fan device and the mounting cavity.

[0011] Preferably, in order to facilitate the guiding cooperation between the bearing and the mounting boss at the connection position, the connection side end surface of the mounting boss and the circumferential outer wall are connected via a transition slope.

[0012] Preferably, in order to facilitate the fitting connection between the inner wall of the cylindrical chamber and the outer ring of the bearing, the inner wall of the cylindrical chamber is provided with a first tapered diameter section, a shoulder section, a second tapered diameter section and a neck section in sequence from the far connection side to the connection side, and the inner diameter of the shoulder section is larger than the inner diameter of the neck section.

[0013] The beneficial effect of the utility model is that the axial compression blade end cover mechanism of the condensing fan provided by the utility model can effectively simplify the processing technology through reasonable design of structure on the basis of ensuring the installation effect, without the need for stamping processing, avoiding the risk of hidden cracks generated during the processing of the end cover, and further saving production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0015] Figure 1 It is a stereogram of the optimal embodiment of the utility model.

[0016] Figure 2 It is the front view of the optimal embodiment of the utility model.

[0017] Figure 3 yes Figure 2 Sectional view of AA.

[0018] Figure 4 yes Figure 3 A magnified schematic diagram of point B in the middle.

[0019] In the figure, 1, end cover body 2, mounting cavity 3, mounting boss 4, countersunk hole 5, transition slope 6, first tapered diameter reducing section 7, shaft shoulder section 8, second tapered diameter reducing section 9, and shaft neck section. DETAILED DESCRIPTION

[0020] The utility model is now described in further detail in conjunction with the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the utility model in a schematic manner, so they only show the components related to the utility model, and the directions and references (for example, up, down, left, right, etc.) can only be used to help describe the features in the drawings. Therefore, the following specific embodiments are not adopted in a restrictive sense, and the scope of the subject matter claimed is limited only by the attached claims and their equivalents.

[0021] like Figures 1 to 4 The condensing fan axial pressure blade end cover mechanism shown is the best embodiment of the utility model. The end cover mechanism includes an end cover body 1, which is used to rotate and connect the blade device at the end cover. In this embodiment, the end face of the end cover body 1 corresponding to the connection side of the blade device is set as the connection side.

[0022] In this embodiment, in order to facilitate the connection between the fan blade device and the end cover body 1, it is convenient to press the bearing between the two. The end cover body 1 is provided with a mounting cavity 2 at the end surface of the connection side, and the mounting cavity 2 is a cylindrical chamber structure. The end surface of the connection side of the end cover body 1 also protrudes at the center position of the bottom surface of the cylindrical chamber structure. A bearing chamber is formed between the cylindrical chamber structure and the mounting boss 3. The bearing chamber is provided for the connection bearing of the fan blade device to be installed with the end cover body 1.

[0023] like Figure 4 As shown, the center position of the connecting side end face of the mounting boss 3 is concave with a countersunk hole 4, and the end face of the rotating shaft of the fan blade device is matched and connected with the countersunk hole 4. The connecting side end face of the mounting boss 3 is connected to the circumferential outer wall through a transition slope 5. During assembly, the outer periphery of the mounting boss 3 is crimped with an O-ring and a gasket, respectively, to provide an effective connection and sealing effect for the installation of the bearing. The transition slope 5 can provide a guide for the bearing and the mounting boss 3 at the connection position, and the countersunk hole 4 can provide a positioning point for the positioning installation of the rotating shaft of the fan blade device, which is convenient for the coaxial positioning assembly of the fan blade device and the mounting cavity 2.

[0024] At the same time, in order to facilitate the connection between the inner wall of the cylindrical chamber and the outer ring of the bearing, the inner wall of the cylindrical chamber is provided with a first tapered diameter reducing section 6, a shaft shoulder section 7, a second tapered diameter reducing section 8 and a shaft neck section 9 in sequence from the far connection side to the connection side, and the inner diameter of the shaft shoulder section 7 is larger than the inner diameter of the shaft neck section 9. The diameter reducing design of the inner wall of the cylindrical chamber is compatible with the structure of the outer ring of the bearing and the rotating shaft.

[0025] In the processing and production of this embodiment, the mounting boss 3, the end cover body 1, and the mounting cavity 2 are preferably integrally cast. Compared with the traditional stamping process of the bearing chamber on the end cover, the present embodiment does not require stamping during the production process. On the one hand, it can reduce the production process and reduce the production cost; on the other hand, it can avoid excessive pressure on the cover wall of the end cover body 1 during the stamping process, avoid the risk of hidden cracks in some thin walls caused by excessive pressure, and improve the safety and reliability of the end cover.

[0026] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without deviating from the technical concept of the utility model through the above description. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A condensing fan axial pressure blade end cover mechanism, used for rotating and connecting the blade device at the end cover, characterized in that: The invention comprises an end cover body (1), wherein the end face of the end cover body (1) corresponding to the connection side of the fan blade device is set as the connection side, the end cover body (1) is provided with a mounting cavity (2) at the end face of the connection side, the mounting cavity (2) is a columnar cavity structure, and the end face of the connection side of the end cover body (1) is provided with a mounting boss (3) protruding at the center position of the bottom face of the columnar cavity structure corresponding to the end face of the columnar cavity structure, a bearing chamber is formed between the columnar cavity structure and the mounting boss (3), and the bearing chamber is provided for the connection bearing of the fan blade device to be matched with the end cover body (1) for mounting; The center position of the connecting side end surface of the mounting boss (3) is concave and has a countersunk hole (4), and the rotating shaft end surface of the fan blade device is matched and connected with the countersunk hole (4).

2. The condensing fan axial pressure blade end cover mechanism according to claim 1, characterized in that: The end cover body (1) and the mounting cavity (2) are integrally cast.

3. The condensing fan axial pressure blade end cover mechanism according to claim 2, characterized in that: The mounting boss (3), the end cover body (1) and the mounting cavity (2) are integrally cast.

4. The condensing fan axial pressure blade end cover mechanism according to claim 1, characterized in that: The connection side end surface of the mounting boss (3) and the circumferential outer wall are connected via a transition slope (5).

5. The condensing fan axial pressure blade end cover mechanism according to claim 1, characterized in that: The inner wall of the cylindrical chamber is provided with a first tapered diameter reducing section (6), a shaft shoulder section (7), a second tapered diameter reducing section (8) and a shaft neck section (9) in sequence from the far connection side to the connection side, and the inner diameter of the shaft shoulder section (7) is larger than the inner diameter of the shaft neck section (9).

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