Centrifugal impeller with adjustable blade angle

Abstract

The invention belongs to the technical field of centrifugal impellers, and particularly relates to a centrifugal impeller with adjustable blade angles. The impeller is reasonable in structural design and is mainly composed of the impeller base, the mounting pipe, the pivotal bearing, the driving bevel gear, the supporting pipe sleeve, the driven bevel gear and the blades, on one hand, the pivotal bearing is used for driving the driving bevel gear to rotate, the driving bevel gear drives the supporting pipe sleeve and the blades on the supporting pipe sleeve to rotate through the driven bevel gear, and automatic adjustment of the angles of the blades is achieved; the angle adjustment precision is high; and on the other hand, the blades are designed to be of a folding structure, the supporting rod assembly is used for unfolding or folding the blades, the smooth rings are introduced into the supporting rod assembly and can adapt to rotation of the blades, and in this way, transportation and manufacturing of the large-specification centrifugal impeller are facilitated.

Description

Technical Field

[0001] The invention belongs to the technical field of centrifugal impellers, and in particular relates to a centrifugal impeller with adjustable blade angles. Background Art

[0002] The blades of existing ordinary fans are all fixed, and their angles are adjusted during production according to the maximum air volume and air pressure required for use. Therefore, fans used in different occasions need to select suitable blades and determine the appropriate angles through complex calculation formulas because of different air volumes, air pressures, etc.

[0003] To this end, the patent specification with publication number CN219366384U discloses an angle-adjustable centrifugal impeller, including a connecting box, a transmission shaft is installed at the bottom end of the connecting box, a driving gear is movably arranged at the top end of the connecting box through a rotating shaft, a plurality of blades are evenly movably arranged on the outside of the connecting box through a bearing, and a connecting rod is fixedly arranged at one end of the plurality of blades inside the connecting box. The angle of the plurality of blades on the centrifugal impeller can be adjusted synchronously by using a driving gear in conjunction with a driven gear on one end of the plurality of blades. The operation is simple and convenient, and can be completed by simply screwing the plug-in rod, thereby ensuring the convenience of the centrifugal impeller when in use. The plug-in rod and the connecting frame used for the adjustment operation are of a separate structure. Since the connecting frame is built into the receiving groove, the flatness of the outer surface of the centrifugal impeller can be ensured after the adjustment work is completed, and the protruding plug-in rod is prevented from affecting the normal use of the centrifugal impeller.

[0004] However, this centrifugal impeller with adjustable blade angle still has some shortcomings. First, its blades are an integrated structure and cannot be folded, which is not conducive to the transportation and manufacture of large-scale centrifugal impellers. Second, it cannot achieve automatic adjustment and the accuracy of angle adjustment is poor. Therefore, it needs to be optimized and improved. Summary of the invention

[0005] The purpose of the present invention is to overcome the above problems existing in the conventional technology and to provide a centrifugal impeller with adjustable blade angles.

[0006] In order to achieve the above technical objectives and the above technical effects, the present invention is implemented through the following technical solutions:

[0007] The present invention provides a centrifugal impeller with adjustable blade angle, comprising an impeller seat, a mounting tube, a slewing bearing, an active bevel gear, a supporting sleeve, a driven bevel gear and blades, wherein a mounting tube is fixed to the outer side of the impeller seat, a sealing cavity is arranged inside the impeller seat, a slewing bearing is mounted on the bottom end of the impeller seat located at the sealing cavity, an active bevel gear is fixed to the outer side of the movable ring of the slewing bearing, a plurality of supporting sleeves that can rotate around their own axis are restricted in circumferential movement on the side of the impeller seat, a driven bevel gear is fixed to the inner end of the supporting sleeve located in the sealing cavity, the driven bevel gear is meshed with the active bevel gear, and blades are mounted on the outer side of the supporting sleeve.

[0008] Furthermore, in the centrifugal impeller with adjustable blade angle, the outer end of the mounting tube is provided with a flange for facilitating quick assembly.

[0009] Furthermore, in the centrifugal impeller with adjustable blade angle, a rotating hole is provided in the impeller seat, and a shaft seal cooperating with the supporting sleeve is installed at the rotating hole.

[0010] Furthermore, in the above-mentioned centrifugal impeller with adjustable blade angle, the blade is a folding blade, including a fixed blade plate and a movable blade plate, one end of the fixed blade plate is fixed to the outer end of the supporting pipe sleeve, and the other end of the fixed blade plate is rotatably connected to the fixed blade plate through a first hinge.

[0011] Furthermore, in the above-mentioned centrifugal impeller with adjustable blade angle, a polygonal column is fixed to the impeller seat at the center of the top surface of the sealing chamber, and radial drive push rods equal to the number of blades are circumferentially installed on the outer side of the polygonal column, and the movable end of the radial drive push rod is connected to one end of the first support rod via a smooth ring, the other end of the first support rod is rotatably connected to one end of the second support rod, the other end of the second support rod is installed with a hinge sleeve, and a hinge shaft is installed on the fixed blade plate, and the hinge shaft and the hinge sleeve constitute a second hinge.

[0012] Furthermore, in the centrifugal impeller with adjustable blade angle, a rolling bearing cooperating with the first support rod is installed in the inner cavity of the supporting sleeve.

[0013] Furthermore, in the centrifugal impeller with adjustable blade angle, the fixed blade is an arc-shaped blade capable of avoiding the first support rod, and at least a portion of the movable blade is an arc-shaped structure capable of avoiding the first support rod.

[0014] Furthermore, in the centrifugal impeller with adjustable blade angle, a support plate is installed on the top surface of the impeller seat located in the sealing cavity, and a through hole is opened in the support plate for the movable rod in the radial driving push rod to pass through.

[0015] The beneficial effects of the present invention are:

[0016] The structure of the present invention is reasonably designed. It is mainly composed of an impeller seat, a mounting tube, a slewing bearing, an active bevel gear, a supporting pipe sleeve, a driven bevel gear and blades. On the one hand, the slewing bearing is used to drive the active bevel gear to rotate, and the active bevel gear drives the supporting pipe sleeve and the blades thereon to rotate through the driven bevel gear, so that the blade angle is automatically adjusted, and the angle adjustment accuracy is relatively high; on the other hand, the blade is designed as a folding structure, and a strut assembly is used to unfold or fold the blade. A smooth ring is introduced into the strut assembly to adapt to the rotation of the blade. In this way, it is beneficial to the transportation and manufacture of large-sized centrifugal impellers.

[0017] Of course, any product implementing the present invention does not necessarily need to achieve all of the above advantages at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 It is a schematic diagram of the main structure of the slewing bearing in the present invention;

[0021] Figure 3 It is a schematic diagram of the top view of the slewing bearing in the present invention;

[0022] Figure 4 It is a schematic diagram of the main structure of the active bevel gear in the present invention;

[0023] Figure 5 It is a schematic diagram of the top view of the active bevel gear in the present invention;

[0024] Figure 6 It is a structural schematic diagram of the blade assembly in the present invention;

[0025] Figure 7 It is a structural schematic diagram of the support rod assembly in the present invention;

[0026] In the accompanying drawings, the reference numerals of the various components are as follows:

[0027] 1-impeller seat, 2-mounting tube, 3-slewing bearing, 4-driving bevel gear, 5-supporting pipe sleeve, 6-driven bevel gear, 7-fixed blade plate, 8-fixed blade plate, 9-first hinge, 10-hinge shaft, 11-polygonal column, 12-radial driving push rod, 13-smooth ring, 14-first support rod, 15-second support rod, 16-hinge sleeve, 17-support plate. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] Embodiment 1

[0030] See also Figure 1-Figure 5 As shown, this embodiment provides a centrifugal impeller with adjustable blade angle, including an impeller seat 1, a mounting tube 2, a slewing bearing 3, an active bevel gear 4, a supporting sleeve 5, a driven bevel gear 6 and blades. The mounting tube 2 is fixed to the outer side of the impeller seat 1, and a sealing cavity is provided inside the impeller seat 1. The impeller seat 1 is provided with a slewing bearing 3 installed at the bottom end of the sealing cavity, and the active bevel gear 4 is fixed to the outer side of the movable ring of the slewing bearing 3. The side of the impeller seat 1 is restricted in circumferential movement by a plurality of supporting sleeves 5 that can rotate around its own axis. The inner end of the supporting sleeve 5 located in the sealing cavity is fixed with a driven bevel gear 6, which is meshed with the active bevel gear 4, and the outer side of the supporting sleeve 5 is provided with blades.

[0031] In this embodiment, a flange is provided at the outer end of the mounting tube 2 for easy quick assembly.

[0032] In this embodiment, a rotating hole is opened in the impeller seat 1, and a shaft seal matched with the supporting sleeve 5 is installed at the rotating hole.

[0033] A specific application of this embodiment is: the centrifugal impeller is mainly composed of an impeller seat 1, a mounting tube 2, a slewing bearing 3, an active bevel gear 4, a supporting sleeve 5, a driven bevel gear 6 and blades. The slewing bearing 3 is used to drive the active bevel gear 4 to rotate, and the active bevel gear 4 drives the supporting sleeve 5 and the blades thereon to rotate through the driven bevel gear 6, so that the blade angle is automatically adjusted, and the angle adjustment accuracy is relatively high.

[0034] Embodiment 2

[0035] See also Figure 1-Figure 7As shown, this embodiment provides a centrifugal impeller with adjustable blade angle, including an impeller seat 1, a mounting tube 2, a slewing bearing 3, an active bevel gear 4, a supporting sleeve 5, a driven bevel gear 6 and blades. The mounting tube 2 is fixed to the outer side of the impeller seat 1, and a sealing cavity is provided inside the impeller seat 1. The impeller seat 1 is provided with a slewing bearing 3 installed at the bottom end of the sealing cavity, and the active bevel gear 4 is fixed to the outer side of the movable ring of the slewing bearing 3. The side of the impeller seat 1 is restricted in circumferential movement by a plurality of supporting sleeves 5 that can rotate around its own axis. The inner end of the supporting sleeve 5 located in the sealing cavity is fixed with a driven bevel gear 6, which is meshed with the active bevel gear 4, and the outer side of the supporting sleeve 5 is provided with blades.

[0036] In this embodiment, a flange is provided at the outer end of the mounting tube 2 for easy quick assembly.

[0037] In this embodiment, a rotating hole is opened in the impeller seat 1, and a shaft seal matched with the supporting sleeve 5 is installed at the rotating hole.

[0038] In this embodiment, the blade is a folding blade, including a fixed blade plate 7 and a movable blade plate 8, one end of the fixed blade plate 7 is fixed to the outer end of the support sleeve 5, and the other end of the fixed blade plate 7 is rotatably connected to the fixed blade plate 8 through a first hinge 9. The support sleeve 5, the driven bevel gear 6 and the blade together constitute a blade assembly.

[0039] In this embodiment, a polygonal column 11 is fixed at the center of the top surface of the impeller seat 1, and radial driving push rods 12 equal to the number of blades are installed on the outer side of the polygonal column 11 along the circumferential direction. The movable end of the radial driving push rod 12 is connected to one end of the first support rod 14 through a smooth ring 13, and the other end of the first support rod 14 is rotatably connected to one end of the second support rod 15. The other end of the second support rod 15 is installed with a hinge sleeve 16, and the fixed blade plate 8 is installed with a hinge shaft 10. The hinge shaft 10 and the hinge sleeve 6 constitute a second hinge. The radial driving push rod 12, the smooth ring 13, the first support rod 14, the second support rod 15 and the hinge sleeve 16 together constitute a support rod assembly.

[0040] In this embodiment, a rolling bearing matched with the first support rod 14 is installed in the inner cavity of the support sleeve 5 .

[0041] In this embodiment, the fixed blade 7 is an arc-shaped blade capable of avoiding the first support rod 14 , and at least a portion of the blade body of the movable blade 8 is an arc-shaped structure capable of avoiding the first support rod 14 .

[0042] In this embodiment, a support plate 17 is installed on the top surface of the impeller seat 1 located in the sealing chamber, and a through hole is opened in the support plate 17 for the movable rod in the radial driving push rod 12 to pass through.

[0043] A specific application of this embodiment is: the centrifugal impeller is mainly composed of an impeller seat 1, a mounting tube 2, a slewing bearing 3, an active bevel gear 4, a supporting sleeve 5, a driven bevel gear 6 and blades. On the one hand, the slewing bearing 3 is used to drive the active bevel gear 4 to rotate, and the active bevel gear 4 drives the supporting sleeve 5 and the blades thereon to rotate through the driven bevel gear 6, so as to realize automatic adjustment of the blade angle, and the angle adjustment accuracy is relatively high; on the other hand, the blade is designed as a folding structure, and a strut assembly is used to unfold or fold the blade. A smooth ring 13 is introduced into the strut assembly to adapt to the rotation of the blade. In this way, it is beneficial to the transportation and manufacture of large-sized centrifugal impellers.

[0044] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to specific implementation methods. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A centrifugal impeller with adjustable blade angle, characterized in that: It includes an impeller seat, a mounting tube, a slewing bearing, a driving bevel gear, a supporting sleeve, a driven bevel gear and blades. A mounting tube is fixed to the outer side of the impeller seat, a sealing cavity is arranged inside the impeller seat, a slewing bearing is installed at the bottom end of the impeller seat located at the sealing cavity, a driving bevel gear is fixed to the outer side of the movable ring of the slewing bearing, a plurality of supporting sleeves that can rotate around their own axes are restricted in circumferential movement on the side of the impeller seat, a driven bevel gear is fixed to the inner end of the supporting sleeve located in the sealing cavity, the driven bevel gear is meshed with the driving bevel gear, and blades are installed on the outer side of the supporting sleeve.

2. The centrifugal impeller with adjustable blade angle according to claim 1, characterized in that: The outer end of the installation pipe is provided with a flange plate for quick assembly.

3. The centrifugal impeller with adjustable blade angle according to claim 2, characterized in that: A rotating hole is provided in the impeller seat, and a shaft seal matched with the supporting sleeve is installed at the rotating hole.

4. The centrifugal impeller with adjustable blade angle according to claim 3, characterized in that: The blade is a folding blade, including a fixed blade plate and a movable blade plate. One end of the fixed blade plate is fixed to the outer end of the supporting pipe sleeve, and the other end of the fixed blade plate is rotatably connected to the fixed blade plate through a first hinge.

5. The centrifugal impeller with adjustable blade angle according to claim 4, characterized in that: The impeller seat is located at the center of the top surface of the sealing chamber and is fixed with a polygonal column. The outer side of the polygonal column is circumferentially installed with radial driving push rods equal to the number of blades. The movable end of the radial driving push rod is connected to one end of the first support rod via a smooth ring. The other end of the first support rod is rotatably connected to one end of the second support rod. The other end of the second support rod is installed with a hinge sleeve. The fixed blade plate is installed with a hinge shaft. The hinge shaft and the hinge sleeve constitute a second hinge.

6. The centrifugal impeller with adjustable blade angle according to claim 5, characterized in that: A rolling bearing matched with the first support rod is installed in the inner cavity of the support sleeve.

7. The centrifugal impeller with adjustable blade angle according to claim 6, characterized in that: The fixed blade is an arc-shaped blade capable of avoiding the first support rod, and at least a part of the plate body of the movable blade is an arc-shaped structure capable of avoiding the first support rod.

8. The centrifugal impeller with adjustable blade angle according to claim 7, characterized in that: The impeller seat is located on the top surface of the sealing cavity and is provided with a support plate, wherein the support plate is provided with a through hole for the movable rod in the radial driving push rod to pass through.

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