Volute angle adjustable fan

Abstract

The utility model relates to fan equipment technical field provides volute angle adjustable fan, including front plate, volute and back plate, and the front plate and back plate are divided in volute axial both sides, and the three enclose and form the chamber containing fan blade, and the axial both ends of volute, the corresponding position of front plate and back plate all are equipped with the mounting hole of annular distribution, and the detachable connection of three is realized through fastener and penetrates the mounting hole, and the back plate is equipped with the mounting flange of coaxial extension in volute cavity, is used for rotatably supporting volute, and when fastener is loosened, volute can rotate around mounting flange axis relative to front plate and back plate circumferential rotation to adjust the angle of outlet, and fasten fixed position. Through rotating volute, can flexibly adjust the circumferential position of its outlet, make airflow outlet can be directly aimed at downstream pipeline or satisfy space layout requirement, need not to rotate whole fan body or use complex elbow.

Description

Technical Field

[0001] This utility model relates to the field of fan equipment technology, specifically to a fan with an adjustable volute angle. Background Technology

[0002] The spatial environment for fan installation and the connection direction of downstream pipelines or equipment can vary. Fixed-outlet fans are very inconvenient when installation is restricted or when it is necessary to change the airflow direction. Therefore, we propose a fan with an adjustable volute angle. Utility Model Content

[0003] In view of the shortcomings of the prior art, this utility model provides a fan with an adjustable volute angle to solve the problems existing in the prior art.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] The adjustable volute angle fan includes a front plate, a volute, and a rear plate. The front and rear plates are located on opposite sides of the volute along its axial direction. Together, they form a chamber to accommodate the fan blades. The axial end faces of the volute and the corresponding positions of the front and rear plates are provided with annularly distributed mounting holes. Fasteners pass through the mounting holes to achieve a detachable connection between the three components. The rear plate is provided with a mounting flange that extends coaxially into the volute cavity to rotatably support the volute. When the fasteners are loosened, the volute can rotate circumferentially relative to the front and rear plates around the axis of the mounting flange to adjust the outlet angle. After tightening, the position is fixed.

[0006] Preferably, the mounting holes are evenly distributed along the circumference, and the central angle between adjacent mounting holes is α degrees, where α = 15° or 30°.

[0007] Preferably, it also includes a mounting base and a motor. The mounting base is fixed to the front plate, and the motor is mounted on the mounting base. Its output shaft passes through the central shaft hole of the front plate and extends into the volute.

[0008] Preferably, multiple circumferentially distributed reinforcing ribs are provided between the mounting flange and the rear plate.

[0009] Preferably, the bottom of the rear plate is provided with a mark hole, and the bottom of the volute is provided with a positioning hole, and the axes of the two holes coincide when the volute is in the reference position.

[0010] This utility model provides a fan with an adjustable volute angle. It has the following beneficial effects:

[0011] 1. By rotating the volute, the circumferential position of the air outlet can be flexibly adjusted, so that the air outlet can be directly aligned with the downstream pipeline or meet the spatial layout requirements without rotating the entire fan body or using complex bends.

[0012] 2. This utility model, through the rotatable and adjustable structure of the volute, allows fans of the same model and power to meet all angle installation requirements with only one set of standardized components. This shortens the construction period for vendors and reduces costs and time for customers, while also facilitating potential future equipment and pipeline modifications.

[0013] 3. In complex ventilation, air conditioning, or industrial systems, this adjustment capability can simplify duct design, reduce unnecessary bends, and make the system layout more compact and efficient.

[0014] 4. The same model of fan can adapt to more different installation scenarios, increasing the product's versatility and applicability. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This utility model Figure 1 Partial structural diagram;

[0017] Figure 3 This utility model Figure 2 A three-dimensional schematic diagram;

[0018] Figure 4 This is a schematic diagram of the rear plate of this utility model;

[0019] Figure 5 This is a schematic diagram of the volute casing of this utility model.

[0020] In the diagram: 1. Mounting base; 11. Motor; 2. Front plate; 3. Volute housing; 31. Positioning hole; 4. Rear plate; 41. Mounting flange; 42. Reinforcing rib; 43. Marker hole; 5. Mounting hole. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, what is described is only a part of this utility model, not all of it. Based on this utility model, all other inventions obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0022] See attached document Figure 1-5The adjustable volute angle fan includes a mounting base 1, a front plate 2, a volute 3, and a rear plate 4. The front plate 2 and the rear plate 4 are set on the axial end faces of the volute 3 to enclose the volute 3 and form a chamber that can accommodate the fan blades. The mounting holes 5 are arranged in a ring on the axial end faces of the volute 3, and the same mounting holes 5 are also provided at the corresponding positions of the front plate 2 and the rear plate 4 for connecting and fixing the front plate 2, the volute 3, and the rear plate 4 with fasteners.

[0023] Mounting holes 5 are evenly distributed along the circumference, and the central angle between adjacent mounting holes is α degrees, where α = 15° and 30°, so that the volute 3 can be rotated and positioned around the axis in units of α degrees.

[0024] Adjustment process:

[0025] First, loosen the connection: First, loosen the fasteners that pass through the front plate 2, the end face of the volute 3, and the corresponding mounting holes 5 of the rear plate 4. Bolts can be used.

[0026] Rotate the volute again: After being released, the volute 3 can rotate circumferentially around its own central axis, that is, the rotation axis of the fan rotor, relative to the fixed front plate 2 and rear plate 4. The front plate 2 and rear plate 4 remain relatively fixed during this process.

[0027] Finally, re-secure the volute: After rotating the volute 3 to the desired angle, tighten the fasteners again, and secure the front plate 2, the end face of the volute 3, and the rear plate 4 through the mounting holes 5 to lock the new angle of the volute 3.

[0028] It also includes a mounting base 1 connected to the front plate 2, a motor 11 fixedly connected to the mounting base 1, the output shaft of the motor 11 extends through the shaft hole in the center of the front plate 2 into the volute 3, and its output end is coaxially arranged with the volute 3. The fan blades in the volute are connected by a spline or keyway, and a sealing ring is provided between the motor output shaft and the shaft hole of the front plate 2.

[0029] The rear plate 4 is provided with a mounting flange 41 that extends coaxially into the volute 3. The mounting flange 41 maintains a radial clearance with the inner wall of the volute 3 and is rotated and supported by bearings or wear-resistant bushings.

[0030] Multiple reinforcing ribs 42 are provided between the mounting flange 41 and the rear plate 4, which are evenly distributed along the circumference. One end of the reinforcing rib 42 is fixed to the outer wall of the mounting flange 41, and the other end is fixed to the end face of the rear plate 4.

[0031] Reference Appendix Figure 3 The bottom of the rear plate 4 is provided with a reference hole 43, and the bottom of the volute 3 is provided with a corresponding positioning hole 31; when the volute 3 is in the 0° reference position, the axes of the two holes coincide, which is used to calibrate the initial installation angle.

[0032] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0033] The above description is only used to illustrate the technical solutions of this utility model, and is not intended to limit it. Although the utility model has been described in detail with reference to the foregoing, those skilled in the art should understand that modifications can still be made to the foregoing technical solutions, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the various technical solutions of this utility model.

Claims

1. A fan with an adjustable volute angle, comprising a front plate (2), a volute (3), and a rear plate (4), characterized in that: The front plate (2) and the rear plate (4) are respectively located on both sides of the axial direction of the volute (3), and the three together form a chamber to accommodate the fan blades; The axial end faces of the volute (3), the corresponding positions of the front plate (2) and the rear plate (4) are provided with annularly distributed mounting holes (5), and the three are detachably connected by fasteners passing through the mounting holes (5). The rear plate (4) is provided with a mounting flange (41) extending coaxially into the cavity of the volute (3) for rotatably supporting the volute (3). When the fasteners are loosened, the volute (3) can rotate circumferentially relative to the front plate (2) and the rear plate (4) around the axis of the mounting flange (41) to adjust the air outlet angle, and then be fixed in position after tightening.

2. The adjustable volute angle fan as described in claim 1, characterized in that: The mounting holes (5) are evenly distributed along the circumference, and the central angle between adjacent mounting holes (5) is α degrees, where α = 15° or 30°.

3. The adjustable volute angle fan as described in claim 1, characterized in that: It also includes a mounting base (1) and a motor (11). The mounting base (1) is fixed to the front plate (2), and the motor (11) is mounted on the mounting base (1). Its output shaft passes through the central shaft hole of the front plate (2) and extends into the volute (3).

4. The adjustable volute angle fan as described in claim 1, characterized in that: Multiple circumferentially distributed reinforcing ribs (42) are provided between the mounting flange (41) and the rear plate (4).

5. The adjustable volute angle fan as described in claim 1, characterized in that: The bottom of the rear plate (4) is provided with a mark hole (43), and the bottom of the volute (3) is provided with a positioning hole (31). The two holes coincide on the axis when the volute (3) is at the 0° reference position.

Images