Four-bearing double-air-inlet centrifugal fan

Abstract

The four-bearing double-air-inlet centrifugal fan comprises a volute main body, air inlets are formed in the two sides of the volute main body, supporting plates are fixedly connected to the interiors of the two air inlets, a supporting shaft is arranged between the two supporting plates, an impeller main body is assembled on the supporting shaft, positioning cylinders are fixedly connected to the two sides of the volute main body, and the positioning cylinders are fixedly connected to the two sides of the volute main body. Filter plates are arranged in the two positioning cylinders, positioning assemblies are arranged on the outer sides of the positioning cylinders, and the positioning assemblies are used for positioning the filter plates. According to the utility model, through the structural cooperation of the positioning cylinder and the filter plate, gas entering the volute main body can be effectively filtered, impurities are prevented from entering the volute main body to influence the operation of the impeller main body, and through the arrangement of the positioning assembly, the filter plate can be quickly disassembled and replaced when the application effect of the filter plate is not good, so that the working efficiency is improved. Therefore, the convenience of the whole application is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to centrifugal fan technical field, concretely is a four bearing double air inlet centrifugal fan. BACKGROUND

[0002] Centrifugal fan is relied on inputted mechanical energy, improves gas pressure and sends gas, and it is a kind of driven fluid machinery.Centrifugal fan is widely used in factory, mine, tunnel, cooling tower, vehicle, ship and ventilation of building and the field of;

[0003] At present, centrifugal fan is mostly provided with filter screen at its air inlet, is used to block impurity, however, the connection of filter screen and centrifugal fan is mainly realized through screw and the like connecting piece, when the application effect of filter screen is poor, it is difficult to replace it quickly, greatly influences the overall convenience.

[0004] Therefore, the utility model provides a four bearing double air inlet centrifugal fan to solve above -mentioned problem. UTILITY MODEL CONTENTS

[0005] In view of the deficiency of prior art, the utility model provides a four bearing double air inlet centrifugal fan, solves above -mentioned problem.

[0006] To realize above -mentioned purpose, the utility model is realized through following technical scheme: a four bearing double air inlet centrifugal fan, including volute main part, the both sides of volute main part are all provided with air inlet, and the inside of two air inlets is all fixedly connected with support plate, and support shaft is set up between two support plates, and impeller main part is assembled on support shaft, and the both sides of volute main part are all fixedly connected with positioning cylinder, and the inside of two positioning cylinders is all provided with filter plate, and the outside of positioning cylinder is provided with positioning assembly, and positioning assembly is used to position filter plate.

[0007] Preferably, the positioning assembly includes a limiting post, a guide plate and a guide slot, the outer side of the positioning cylinder is slidably connected with a plurality of limiting posts, the top end of each limiting post is fixedly connected with a guide plate, the middle part of the guide plate is provided with a guide slot, the end of the positioning cylinder away from the volute main body is fixedly connected with a positioning ring, the edge of one side of the positioning ring is rotatably connected with a transmission screw, the outer side of the transmission screw is threadedly connected with a push ring, the outer side of the push ring is fixedly connected with a linkage frame corresponding to the guide slot, the end of the linkage frame away from the positioning ring is fixedly connected with a linkage shaft, and the linkage shaft is also movably connected in the corresponding positioning ring.

[0008] Preferably, the inner wall of the positioning cylinder is fixedly connected with a limiting ring, and the side of the limiting ring is fixedly connected with a sealing ring.

[0009] Preferably, the guide groove is arranged obliquely, and the inner side of the positioning ring is fixedly connected with a wear-resistant pad.

[0010] Preferably, the end of the transmission screw away from the positioning ring is further connected with the positioning cylinder through a ball bearing.

[0011] Preferably, the side of the transmission screw is fixedly connected with a force knob, and the outer side of the force knob is provided with anti-skid lines.

[0012] Preferably, the positioning cylinder and the positioning ring are fixedly connected with a guide sliding rod, the two ends of the push ring are provided with guide holes, and the guide holes are in clearance fit with the guide sliding rod.

[0013] Beneficial effects

[0014] The utility model provides a four bearing double -sided wind centrifugal fan. Compared with prior art has the following beneficial effects:

[0015] The four bearing double -sided wind centrifugal fan, through the structure cooperation of positioning cylinder and filter plate, can effectively filter the gas into the volute main body, avoid the impurity into volute main body influence impeller main body's operation, and through the setting of positioning assembly, when the application effect of filter plate is not good, the filter plate is quickly replaced, so as to guarantee the convenience of overall application. ACCOUT OF DRAWINGS

[0016] Figure 1 It is the whole schematic diagram of the utility model;

[0017] Figure 2 It is the back view of the whole structure of the utility model;

[0018] Figure 3 It is the internal structure schematic diagram of volute main body of the utility model;

[0019] Figure 4 It is the structure schematic diagram of positioning assembly of the utility model;

[0020] Figure 5 It is the separation structure schematic diagram of transmission screw and limit sliding rod of the utility model.

[0021] In the drawing, 1, volute main body;2, air inlet;3, support plate;4, impeller main body;5, positioning cylinder;6, filter plate;7, positioning assembly;8, limit column;9, guide plate;10, guide groove;11, positioning ring;12, transmission screw;13, push ring;14, linkage frame;15, linkage shaft;16, bearing A;17, bearing B;18, bearing C;19, bearing D. Specific implementation

[0022] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0023] Embodiment one:

[0024] Please refer to Figures 1-5 A four-bearing double-inlet centrifugal fan, comprising a volute main body 1, air inlets 2 are formed on both sides of the volute main body 1, support plates 3 are fixedly connected inside the two air inlets 2, a support shaft is arranged between the two support plates 3, an impeller main body 4 is assembled on the support shaft, positioning cylinders 5 are fixedly connected on both sides of the volute main body 1, filter plates 6 are arranged inside the two positioning cylinders 5, and positioning assemblies 7 are arranged on the outside of the positioning cylinders 5, which are used for positioning the filter plates 6;

[0025] In the embodiment, the impeller main body 4 is of a double-suction structure, has blades on both sides, is designed symmetrically to reduce axial force and improve operation stability, and is provided with a transmission assembly to drive the impeller main body 4 to rotate. When the impeller main body 4 rotates at high speed, gas is thrown from the center to the edge by centrifugal force, kinetic energy and pressure are gradually increased, the flow rate is reduced along with the gradual expansion of the passage cross-sectional area of the volute main body 1, kinetic energy is converted into static pressure energy, and finally high-pressure gas flow is discharged through a single air outlet, which is mature prior art and will not be described here.

[0026] More specifically, in order to improve the smoothness of the connection between the support shaft and the impeller main body 4, bearings A16 and bearings D19 are arranged at the connection between the support shaft and the support plate 3, and bearings B17 and bearings C18 are arranged at the connection between the impeller main body 4 and the bearings C18.

[0027] In the embodiment, the inner wall of the positioning cylinder 5 is fixedly connected with a limiting ring, and the limiting ring is fixedly connected with a sealing ring on one side. Through the arrangement of the limiting ring, the filter plate 6 can be supported by the limiting ring after being placed in the positioning cylinder 5, so that uncontrollable displacement of the filter plate 6 is avoided. In combination with the arrangement of the sealing ring, the connection between the filter plate 6 and the limiting ring can be sealed.

[0028] Embodiment two:

[0029] Please refer to Figures 1-5The embodiment provides a technical scheme on the basis of the embodiment one: the positioning assembly 7 comprises a limiting column 8, a guide plate 9 and a guide groove 10, a plurality of limiting columns 8 are slidably connected to the outer side of the positioning cylinder 5, the top end of each limiting column 8 is fixedly connected with the guide plate 9, the middle part of the guide plate 9 is provided with the guide groove 10, the positioning cylinder 5 is fixedly connected with a positioning ring 11 at one end away from the volute main body 1, the edge of one side of the positioning ring 11 is rotatably connected with a transmission screw 12, the outer side of the transmission screw 12 is threadedly connected with a pushing ring 13, the outer side of the pushing ring 13 is fixedly connected with a linkage frame 14 corresponding to the guide groove 10, one end of the linkage frame 14 away from the positioning ring 11 is fixedly connected with a linkage shaft 15, and the linkage shaft 15 is also movably connected in the corresponding positioning ring 11;

[0030] In the embodiment, the guide groove 10 is inclined, the inner side of the positioning ring 11 is fixedly connected with a wear-resistant pad, and when the linkage shaft 15 linearly displaces, the limiting column 8 can be adaptively vertically adjusted through the inclination of the guide groove 10;

[0031] In the embodiment, one end of the transmission screw 12 away from the positioning ring 11 is also connected with the positioning cylinder 5 through a ball bearing, and the transmission screw 12 can be assisted and supported through the connection with the positioning cylinder 5, so that the smoothness and stability of the transmission screw 12 during rotation are guaranteed;

[0032] In the embodiment, one side of the transmission screw 12 is fixedly connected with a force knob, and the outer side of the force knob is provided with anti-skid lines, so that the transmission screw 12 can be more conveniently held by personnel through the arrangement of the force knob, and the transmission efficiency of the transmission screw 12 is guaranteed;

[0033] In the embodiment, the positioning cylinder 5 and the positioning ring 11 are fixedly connected with a guide slide rod, the two ends of the pushing ring 13 are provided with guide holes, and the guide holes and the guide slide rod are gap-fitted, so that the displacement of the positioning ring 11 can be effectively guided through the connection of the guide slide rod and the positioning ring 11, and uncontrollable displacement of the positioning ring 11 is avoided;

[0034] Meanwhile, the contents not described in detail in the specification all belong to the prior art known by those skilled in the art.

[0035] Working principle: before the gas enters the volute main body 1, impurities in the gas flow are filtered out through the filter plate 6, so that the impurities cannot enter the support plate 3 and affect the operation of the impeller main body 4;

[0036] When the filtering effect of the filter plate 6 is poor, first, rotate the transmission screw rod 12, under the connection of the transmission screw rod 12 and the pushing ring 13, the pushing ring 13 can be displaced along the transmission screw rod 12, and because the linkage shaft rod 15 is connected inside the corresponding guide through slot 10, when the linkage shaft rod 15 follows the displacement of the positioning ring 11, it can adaptively move inside the guide through slot 10, because the linkage shaft rod 15 is linear displacement, and then it can drive the limiting column 8 to adjust vertically, when the limiting column 8 is disengaged from the filter plate 6, the limiting of the limiting column 8 can be released, and then the filter plate 6 can be taken down and replaced.

[0037] It should be noted that, in this document, relational terms such as first and second and the like can be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0038] Although the embodiments of the present application have been shown and described, it is to be understood that for the purpose of the present application, the embodiments change, modify, replace, and vary in many ways without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A four-bearing, dual-inlet centrifugal fan, comprising a volute body (1), wherein air inlets (2) are provided on both sides of the volute body (1), characterized in that: A support plate (3) is fixedly connected inside each of the two air inlets (2). A support shaft is provided between the two support plates (3). An impeller body (4) is mounted on the support shaft. Positioning cylinders (5) are fixedly connected to both sides of the volute body (1). A filter plate (6) is provided inside each of the two positioning cylinders (5). A positioning component (7) is provided on the outside of the positioning cylinder (5). The positioning component (7) is used to position the filter plate (6).

2. The four-bearing dual-inlet centrifugal fan according to claim 1, characterized in that: The positioning component (7) includes a limiting post (8), a guide plate (9), and a guide groove (10). Multiple limiting posts (8) are slidably connected to the outer side of the positioning cylinder (5). A guide plate (9) is fixedly connected to the top of each limiting post (8). A guide groove (10) is opened in the middle of the guide plate (9). A positioning ring (11) is fixedly connected to the end of the positioning cylinder (5) away from the volute body (1). A transmission screw (12) is rotatably connected to one side edge of the positioning ring (11). A push ring (13) is threadedly connected to the outer side of the transmission screw (12). A linkage frame (14) corresponding to the guide groove (10) is fixedly connected to the outer side of the push ring (13). A linkage shaft (15) is fixedly connected to the end of the linkage frame (14) away from the positioning ring (11). The linkage shaft (15) is also movably connected inside the corresponding positioning ring (11).

3. A four-bearing dual-inlet centrifugal fan according to claim 2, characterized in that: The inner wall of the positioning cylinder (5) is fixedly connected with a limiting ring, and a sealing ring is fixedly connected to one side of the limiting ring.

4. A four-bearing dual-inlet centrifugal fan according to claim 2, characterized in that: The guide groove (10) is inclined, and a wear-resistant pad is fixedly connected to the inner side of the positioning ring (11).

5. A four-bearing dual-inlet centrifugal fan according to claim 2, characterized in that: The end of the transmission screw (12) away from the positioning ring (11) is also connected to the positioning cylinder (5) via a ball bearing.

6. A four-bearing dual-inlet centrifugal fan according to claim 2, characterized in that: A force-receiving knob is fixedly connected to one side of the transmission screw (12), and the outer side of the force-receiving knob is provided with anti-slip texture.

7. A four-bearing dual-inlet centrifugal fan according to claim 2, characterized in that: A guide slide rod is fixedly connected between the positioning cylinder (5) and the positioning ring (11). Guide holes are provided at both ends of the push ring (13), and the guide holes and the guide slide rod are in clearance fit.

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