Coupling structure with support for centrifugal fan

Abstract

According to the disclosed coupling structure with the support for the centrifugal fan, a first connecting sleeve and a second connecting sleeve are oppositely arranged, flange plates are fixedly arranged at the opposite ends of the first connecting sleeve and the second connecting sleeve correspondingly, and the two flange plates are connected through a fastener; the two bearing seats are arranged on the two sides of the first connecting sleeve and the second connecting sleeve respectively, the other ends of the first connecting sleeve and the second connecting sleeve are fixedly connected with shaft bushings respectively, the shaft bushings are arranged in bearing holes of the corresponding bearing seats, and bearings are arranged between the shaft bushings and the corresponding bearing holes; pin shaft holes are formed in the side faces of the first connecting sleeve and the second connecting sleeve correspondingly. In the coupling structure with the support, the first connecting sleeve and the second connecting sleeve are matched and connected with the corresponding bearing seats through respective shaft bushings, so that the first connecting sleeve and the second connecting sleeve can be well supported and are not easy to shake during high-speed operation; and the failure rate of the coupling type centrifugal fan at the coupling is reduced.

Description

Technical Field

[0001] The utility model belongs to the field of fan equipment, and relates to a component of a coupling type centrifugal fan, in particular to a coupling structure with support of the centrifugal fan. Background Art

[0002] Centrifugal fans are machines that rely on input mechanical energy to increase gas pressure and discharge gas. They are driven fluid machines. Centrifugal fans are widely used in ventilation, dust removal and cooling of factories, mines, tunnels, cooling towers, vehicles, ships and buildings, ventilation and air intake of boilers and industrial furnaces, cooling and ventilation of air conditioning equipment and household appliances, drying and selection of grains, wind tunnel wind sources and inflation and propulsion of hovercraft, etc.

[0003] Existing centrifugal fans can be divided into pulley type and coupling type. The present application relates to a coupling type centrifugal fan. Coupling type centrifugal fans generally use couplings to fix the rotating shaft of the fan impeller and the output shaft of the motor together. Existing couplings generally do not have supports. In coupling type centrifugal fans, since the rotating shaft of the fan impeller and the output shaft of the motor are both relatively long, when the two relatively long shafts are connected by a coupling, the coupling components of the centrifugal fan will shake when running at high speed. In the long run, the coupling components will loosen and cause serious wear. Therefore, the highest failure rate of coupling type centrifugal fans is also at the coupling. Utility Model Content

[0004] Based on the content in the background technology, the utility model provides a coupling structure with support for a centrifugal fan, comprising a first connecting sleeve, a second connecting sleeve, a flange, a bearing seat and a shaft bushing; the first connecting sleeve and the second connecting sleeve are arranged opposite to each other, and the first connecting sleeve and the second connecting sleeve are respectively fixed with flanges at opposite ends, and the two flanges are connected by fasteners, and the fasteners are specifically high-strength bolts and anti-loosening nuts;

[0005] There are two bearing seats in total, which are arranged on both sides of the first connecting sleeve and the second connecting sleeve. The other ends of the first connecting sleeve and the second connecting sleeve are respectively fixedly connected with shaft bushings, which are arranged in the bearing holes of the corresponding bearing seats. A bearing is arranged between the shaft bushings and the corresponding bearing holes. The bearing is specifically a cylindrical roller bearing, which can withstand a large radial load and is suitable for high-speed rotation.

[0006] The first connecting sleeve is used to connect the rotating shaft of the fan impeller, and the second connecting sleeve is used to connect the output shaft of the motor. When the coupled centrifugal fan is running at high speed, the first connecting sleeve and the second connecting sleeve are well supported due to the matching connection design of their respective shaft bushings and corresponding bearing seats, and they will not shake easily during high-speed operation, thereby reducing the failure rate of the coupled centrifugal fan at its coupling.

[0007] Furthermore, the bearing seat is provided with a retaining ring at the outer edge of the bearing hole, and the retaining ring is fixedly connected to the side of the bearing seat by bolts. The retaining ring can limit the bearing in the bearing hole to prevent it from falling off from the bearing hole during operation.

[0008] Furthermore, at least one pin hole is respectively provided on the side surfaces of the first connecting sleeve and the second connecting sleeve, and corresponding pin holes are also provided on the rotating shaft of the fan impeller and the output shaft of the motor, so that the rotating shaft of the impeller can be fastened to the first connecting sleeve, and the output shaft of the motor can be fastened to the second connecting sleeve through high-strength pins.

[0009] Through the above technical solution, the utility model at least includes the following beneficial effects:

[0010] In the technical solution of the present application, the first connecting sleeve and the second connecting sleeve are designed to be connected by the matching connection of their respective shaft bushings and corresponding bearing seats, so that the first connecting sleeve and the second connecting sleeve can be well supported and will not shake easily during high-speed operation, thereby reducing the failure rate of the coupled centrifugal fan at its coupling. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is an overall schematic diagram of a coupling structure with support of a centrifugal fan described in an embodiment of the present application;

[0012] Figure 2 This is a schematic diagram of the structure of the first connecting sleeve, the second connecting sleeve and the shaft bushing in the embodiment of the present application; DETAILED DESCRIPTION

[0013] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. These drawings are simplified schematic diagrams that only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the structures related to the present invention.

[0014] In the description of this application, it should be understood that if there are terms such as "upper", "lower", "left", "right", "front", "rear", etc. indicating the orientation or positional relationship, they are based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the positional relationship are only used for exemplary description and cannot be understood as limiting this patent; if there are terms such as "first", "second", etc., they are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second", etc. may explicitly or implicitly include one or more of the said features. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to the specific circumstances.

[0015] In the description of the utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the utility model can be understood according to specific circumstances.

[0016] refer to Figure 1 and Figure 2 A centrifugal fan coupling structure with support includes a first connecting sleeve 41, a second connecting sleeve 42, a flange 43, a bearing seat 44 and a shaft bushing 45; the first connecting sleeve 41 and the second connecting sleeve 42 are arranged opposite to each other, and the first connecting sleeve 41 and the second connecting sleeve 42 are respectively fixed with flanges 43 at opposite ends, and the two flanges 43 are connected by fasteners, which are specifically high-strength bolts and anti-loosening nuts;

[0017] There are two bearing seats 44 arranged on both sides of the first connecting sleeve 41 and the second connecting sleeve 42. The other ends of the first connecting sleeve 41 and the second connecting sleeve 42 are respectively fixedly connected with shaft bushings 45. The shaft bushings 45 are arranged in the bearing holes of the corresponding bearing seats 44. A bearing is arranged between the shaft bushings 45 and the corresponding bearing holes. The bearing is specifically a cylindrical roller bearing 48, which can withstand a large radial load and is suitable for high-speed rotation.

[0018] The first connecting sleeve 41 is used to connect the rotating shaft of the fan impeller, and the second connecting sleeve 42 is used to connect the output shaft of the motor. When the coupled centrifugal fan is running at high speed, the first connecting sleeve 41 and the second connecting sleeve 42 are well supported due to the matching connection design of their respective shaft bushings 45 and the corresponding bearing seats 44, and they will not shake easily during high-speed operation, thereby reducing the failure rate of the coupled centrifugal fan at its coupling.

[0019] The bearing seat 44 is provided with a retaining ring 46 at the outer edge of the bearing hole. The retaining ring 46 is fixedly connected to the side of the bearing seat 44 by bolts. The retaining ring 46 can limit the bearing in the bearing hole to prevent it from falling out of the bearing hole during operation.

[0020] The sides of the first connecting sleeve 41 and the second connecting sleeve 42 are respectively provided with at least one pin hole 47, and corresponding pin holes 47 are also provided on the rotating shaft of the fan impeller and the output shaft of the motor, so that the rotating shaft of the impeller can be fastened to the first connecting sleeve 41 and the output shaft of the motor can be fastened to the second connecting sleeve 42 through high-strength pins.

[0021] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Based on the present invention and the above description, relevant personnel can make various changes and modifications without departing from the technical idea of ​​the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A coupling structure with support for a centrifugal fan, characterized in that: The invention comprises a first connecting sleeve (41), a second connecting sleeve (42), a flange (43), a bearing seat (44) and a shaft bushing (45); the first connecting sleeve (41) and the second connecting sleeve (42) are arranged opposite to each other, and the flanges (43) are fixedly arranged at opposite ends of the first connecting sleeve (41) and the second connecting sleeve (42), and the two flanges (43) are connected by fasteners; There are two bearing seats (44) respectively arranged on both sides of the first connecting sleeve (41) and the second connecting sleeve (42); the other ends of the first connecting sleeve (41) and the second connecting sleeve (42) are respectively fixedly connected with shaft bushings (45); the shaft bushings (45) are arranged in the bearing holes of the corresponding bearing seats (44); and bearings are arranged between the shaft bushings (45) and the corresponding bearing holes.

2. A centrifugal fan coupling structure with support according to claim 1, characterized in that: The bearing seat (44) is provided with a retaining ring (46) at the outer edge of the bearing hole, and the retaining ring (46) is fixedly connected to the side surface of the bearing seat (44) by bolts.

3. The supporting coupling structure of a centrifugal fan according to claim 1, characterized in that: At least one pin hole (47) is respectively formed on the side surfaces of the first connecting sleeve (41) and the second connecting sleeve (42).

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