CN219412989U - Hole type servo structure centrifugal fan - Google Patents

Abstract

The utility model relates to the field of fans, and discloses a centrifugal fan with a hole type servo structure, which comprises: the volute is provided with an air inlet and an air outlet; the driving assembly is connected in the air inlet barrel and is provided with a rotatable rotor, the inner side of the rotor is synchronously connected with a transmission sleeve, and an air inlet channel is axially arranged in the transmission sleeve; the impeller is positioned in the volute, and the impeller is synchronously connected with the transmission sleeve, so that the structure of the whole centrifugal fan is simplified, the driving assembly is directly integrated in the fan shell, an air inlet channel is directly formed in the driving assembly, the structural volume formed by production and assembly and the space required by working are reduced, the centrifugal fan is applicable to more use environments, and the practicability is higher.

Description

Hole type servo structure centrifugal fan

Technical Field

The utility model relates to a fan, in particular to a centrifugal fan with a hole type servo structure.

Background

The centrifugal fan is common gas conveying equipment and is widely applied to the industrial fields of gas conveying, ventilation, cooling, heating and the like. The centrifugal fan comprises two side plates arranged at intervals and a volute plate connected between the two side plates, wherein the two side plates and the volute plate are arranged in a surrounding mode to form a main body structure of the volute, and an impeller is arranged between the two side plates.

At present, most centrifugal fans are driven by conventional three-phase asynchronous motors or servo motors, part of motor heads are connected with impellers in the centrifugal fans in a transmission mode through transmission structures such as belts or couplings, the other part of motors are directly installed and fixed on side plates, and the motor heads are directly driven and connected with the impellers. The centrifugal fan and the motor are mutually independent during production, the motor is installed on one side of the volute during assembly, and the other side of the volute is used as an air inlet, so that the whole volume occupied during installation and working is large, the occupied space is difficult to further reduce, and the centrifugal fan and the motor cannot be used in environments with high requirements such as small space.

Disclosure of Invention

The utility model aims to provide a centrifugal fan with a hole type servo structure, which solves one or more technical problems in the prior art and at least provides a beneficial selection or creation condition.

The utility model solves the technical problems as follows:

a hole pattern servo structured centrifugal fan comprising: the volute is provided with an air inlet and an air outlet; the driving assembly is connected in the air inlet barrel and is provided with a rotatable rotor, the inner side of the rotor is synchronously connected with a transmission sleeve, and an air inlet channel is axially arranged in the transmission sleeve; and the impeller is positioned in the volute and is synchronously connected with the transmission sleeve.

The technical scheme has at least the following beneficial effects: the whole that spiral case and air inlet section of thick bamboo are connected and are formed is regarded as the fan housing, during operation, the rotor of drive assembly passes through the impeller rotation in the drive sleeve direct drive spiral case, impeller produces negative pressure in air inlet section of thick bamboo department, air enters into the air inlet passageway from external environment, and flow into in the spiral case, outwards blow out from the air outlet of spiral case, accomplish air inlet and air-out, in this structure, drive assembly both can be used to drive the impeller rotation, its inside drive sleeve directly encloses and establishes the air inlet passageway that is used for the air inlet, make the structure that is used for driving and the structure that is used for the air inlet all lie in the same side of spiral case, the space requirement of during operation has been reduced, in addition, the air inlet passageway can directly dispel the heat to the rotor in the drive assembly during the air inlet, the stability of complete machine during operation has been favorable to be improved, so simplified the structure of whole centrifugal fan, directly integrate drive assembly in the fan housing, make the drive assembly in the direct formation air inlet passageway, the structure volume that is formed at the production equipment and the required space during operation, more service environment, the practicality is stronger.

As a further improvement of the technical scheme, the side plate, far away from the air inlet barrel, on the volute is a mounting plate, and mounting holes are formed in the mounting plate. The impeller is of a unilateral driving structure, and specifically, an air inlet barrel is connected to one side plate of the volute, a driving component used for driving the impeller to rotate is arranged in the air inlet barrel, the other side plate of the volute is used as a mounting plate and can be used for mounting and fixing a structural surface arranged outside, such as a wall surface, and a connecting piece is driven into a mounting hole for further fastening the mounting plate, so that the wall hanging function of the centrifugal fan can be realized, and the whole structure is of a unilateral air inlet structural form.

As another improvement of the above technical solution, a boss is connected to a side of the mounting plate located in the volute, and a first bearing is connected between the boss and the impeller. The boss on the mounting panel is rotated through first bearing and impeller and is connected, so all has the rotation in the both sides of impeller to be connected and inject, can further improve the stability when impeller rotates.

As a further improvement of the technical scheme, the two side plates of the volute are connected with the air inlet cylinders, the two air inlet cylinders are connected with the driving assemblies, and the transmission sleeves in the driving assemblies are respectively and synchronously connected with the two ends of the impeller. At this moment, the both sides of impeller all are connected with drive assembly, and specifically, all be connected with the inlet air section of thick bamboo on two curb plates of spiral case, during operation, the air inlet passageway in two inlet air sections all can be used to the air inlet, and the air flows in from the both sides of spiral case, and the last air outlet that follows on the spiral case discharges, so can realize the high-speed rotation of impeller, and the outside output amount of wind is bigger under the condition of equal structural volume.

As a further improvement of the technical scheme, the driving assembly comprises a stator, a first annular step is arranged at one end, far away from the volute, of the air inlet barrel, the stator is connected in the first annular step, the rotor is located in the stator, and the transmission sleeve is rotationally connected to the inner side wall of the air inlet barrel. The first annular step is of a step structure that the inner side of the air inlet barrel extends around the axis of the air inlet barrel, when the stator is installed on the first annular step, the stator can be quickly installed in place, the installation stroke of the stator is limited by the first annular step, the stability of the stator in working is improved, and the concave structure formed on the inner side of the air inlet barrel of the first annular step is beneficial to avoiding the installation position of the rotor.

As a further improvement of the technical scheme, a connecting ring is connected to the inner side of the rotor, the end part of the transmission sleeve abuts against the connecting ring, a screw is inserted into the connecting ring, and the screw is connected to the end part of the transmission sleeve. When the rotor is assembled, the rotor is sleeved on the outer side of the transmission sleeve, the connecting ring on the inner side of the rotor is utilized to limit the position of the transmission sleeve matched with the rotor, when the end part of the transmission sleeve abuts against the connecting ring, the transmission sleeve and the connecting ring are installed in place, at the moment, screws penetrate through the connecting ring and then are installed and fixed on the end part of the transmission sleeve, and synchronous connection of the rotor and the transmission sleeve can be achieved, so that quick assembly of the rotor and the transmission sleeve can be achieved, and the connecting structure is stable.

As a further improvement of the technical scheme, the first annular step is provided with a second annular step, a second bearing is connected in the second annular step, and the transmission sleeve is connected with the inner ring of the second bearing. The second annular step is of a step structure which extends around the axis of the air inlet barrel on the step surface of the first annular step, the driving sleeve and the second bearing are assembled into the air inlet barrel after the inner ring of the second bearing is sleeved on the outer side of the driving sleeve, at the moment, the outer ring of the second bearing can be embedded into the second annular step, and the stroke of the second bearing is limited by the second annular step, so that the second bearing is stably connected between the air inlet barrel and the driving sleeve.

As a further improvement of the above technical solution, a spacer is connected to the outer side of the transmission sleeve, and the spacer is located between the inner ring of the second bearing and the rotor. The inner ring of the second bearing and the rotor can be mutually separated by the spacer bush, so that the two ends of the second bearing are respectively limited by the second annular step and the spacer bush together, the second bearing can be effectively prevented from moving along the axial direction during working, and the stability of the whole working is further improved.

As a further improvement of the technical scheme, one end of the air inlet barrel, which is far away from the volute, is connected with a flange, and the flange abuts against the end part of the stator. The flange can press and fasten the stator in the first annular step, so that the structural stability of the stator mounted on the air inlet cylinder is further improved.

As a further improvement of the technical scheme, the flange is connected with an air inlet ring, one end of the air inlet ring extends into the air inlet channel, and the inner diameter of the air inlet ring gradually increases along the direction away from the air inlet channel. The structure that the inlet air ring expands outward gradually to keeping away from impeller direction can increase the inlet air quantity of leading-in inlet air passageway to further improve fan efficiency.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the drawings that are required to be used in the description of the embodiments will be briefly described below. It is evident that the drawings described are only some embodiments of the utility model, but not all embodiments, and that other designs and drawings can be obtained from these drawings by a person skilled in the art without inventive effort.

Fig. 1 is a perspective view of a first embodiment of the present utility model.

Fig. 2 is a perspective view of a second embodiment of the present utility model.

Fig. 3 is a front view of a first embodiment of the present utility model.

Fig. 4 is a schematic view of the cross-sectional structure A-A of fig. 3.

Fig. 5 is a front view of a second embodiment of the present utility model.

Fig. 6 is a schematic view of the sectional B-B structure of fig. 5.

In the accompanying drawings: 100-spiral case, 110-air inlet cylinder, 111-first annular step, 112-second annular step, 113-second bearing, 120-air outlet, 130-mounting plate, 131-mounting hole, 140-boss, 141-first bearing, 210-rotor, 211-screw, 220-driving sleeve, 221-air inlet channel, 230-stator, 240-spacer, 250-flange, 260-air inlet ring, 300-impeller.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

In the description of the present utility model, it should be understood that references to orientation descriptions such as upper, lower, front, rear, left, right, etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of description of the present utility model and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present utility model.

In the description of the present utility model, a number means one or more, a number means two or more, and greater than, less than, exceeding, etc. are understood to not include the present number, and above, below, within, etc. are understood to include the present number. The description of the first and second is for the purpose of distinguishing between technical features only and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present utility model, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly and the specific meaning of the terms in the present utility model can be reasonably determined by a person skilled in the art in combination with the specific contents of the technical scheme.

Referring to fig. 1, a centrifugal fan with a hole-type servo structure comprises a volute 100, a driving assembly and an impeller 300, wherein the volute 100 also comprises two side plates and a volute plate connected between the two side plates, a cavity is formed between the volute plate and the two side plates in a surrounding manner, an air inlet barrel 110 is connected to the side plates of the volute 100, the volute 100 and the air inlet barrel 110 can be in an integrated structure or can be assembled and connected into a whole in a welding manner or the like during production, an air outlet 120 is arranged on the volute plate of the volute 100, the driving assembly is connected into the air inlet barrel 110, the driving assembly is provided with a rotatable rotor 210, a transmission sleeve 220 is synchronously connected to the inner side of the rotor 210, an air inlet channel 221 is axially arranged in the transmission sleeve 220, the impeller 300 is positioned in the volute 100, and the impeller 300 is synchronously connected to the transmission sleeve 220.

As can be seen from the above, the whole body formed by connecting the volute 100 and the air inlet barrel 110 is taken as a fan housing, during operation, the rotor 210 of the driving assembly directly drives the impeller 300 in the volute 100 to rotate through the transmission sleeve 220, the impeller 300 generates negative pressure at the air inlet barrel 110, air enters the air inlet channel 221 from the external environment and flows into the volute 100, and is blown out from the air outlet 120 of the volute plate to finish air inlet and air outlet.

In the first embodiment, as shown in fig. 3 and fig. 4, the centrifugal fan driven by the hole type servo motor has an air inlet, the side plate of the volute 100 far from the air inlet barrel 110 is a mounting plate 130, and the mounting plate 130 is provided with a mounting hole 131. At this time, the impeller 300 is of a single-side driving structure, specifically, an air inlet barrel 110 is connected to one side plate of the volute 100, a driving component for driving the impeller 300 to rotate is installed in the air inlet barrel 110, the other side plate of the volute is used as a mounting plate 130, and can be used for installing and fixing a peripheral structural surface, such as a wall surface, and a connecting piece is driven into the mounting hole 131 for further fastening the mounting plate 130, so that the wall hanging function of the centrifugal fan can be realized, and the whole structure is of a single-side air inlet structure. In practical application, in order to facilitate the installation and fixation of the installation plate 130, the area of the installation plate 130 is larger than the area of the side plate of the volute casing 100 connected with the air inlet duct 110, at this time, the installation plate 130 has a part of positions protruding from the volute casing, and a plurality of installation holes 131 can be arranged at the positions of the installation plate 130 protruding from the volute casing, so that the connection members can be conveniently and directly driven into the installation holes 131 of the installation plate 130 to be fastened on the external structural surface.

In the first embodiment, a boss 140 is connected to a side of the mounting plate 130 located in the volute 100, and a first bearing 141 is connected between the boss 140 and the impeller 300. The boss 140 on the mounting plate 130 is rotatably connected with the impeller 300 through the first bearing 141, so that both sides of the impeller 300 are rotatably limited, and the stability of the impeller 300 during rotation can be further improved.

As shown in fig. 2, 5 and 6, in the second embodiment, the centrifugal fan driven by the hole type servo motor has two air inlets, specifically, two side plates of the volute 100 are connected with the air inlet cylinders 110, two air inlet cylinders 110 are connected with the driving assemblies, and the transmission sleeves 220 in the two driving assemblies are synchronously connected with two ends of the impeller 300 respectively. At this time, the two sides of the impeller 300 are connected with driving components, specifically, the two side plates of the volute 100 are connected with the air inlet cylinders 110, during operation, the air inlet channels 221 in the two air inlet cylinders 110 can be used for air inlet, air flows in from the two sides of the volute 100 and finally is discharged from the air outlet 120 on the volute 100, so that the impeller 300 can rotate at a high speed, and the output air quantity is larger outwards under the condition of the same structural volume.

In either the first embodiment or the second embodiment, as a specific structural embodiment of the driving assembly, the driving assembly includes a stator 230, a first annular step 111 is disposed at an end of the air inlet barrel 110 away from the volute 100, the stator 230 is connected to the first annular step 111, the rotor 210 is located in the stator 230, and the transmission sleeve 220 is rotatably connected to an inner sidewall of the air inlet barrel 110. The first annular step 111 is a step structure extending around the axis of the air inlet barrel 110, when the stator 230 is installed on the first annular step 111, the stator 230 can be quickly installed in place, the installation stroke of the stator 230 is limited by the first annular step 111, the stability of the stator 230 in working is improved, and the concave structure formed on the inner side of the air inlet barrel 110 by the first annular step 111 is beneficial to avoiding the installation position of the rotor 210.

The rotor 210 and the transmission sleeve 220 are connected synchronously, and the connection structure forms of the connection structure forms are various, for example, synchronous movement is realized by mutually matching the two through a key and a groove, or a connecting piece is directly driven into the transmission sleeve 220 at the outer side of the rotor 210, so that synchronous movement of the two is realized, and in order to improve convenience of mutual assembly of the two, in the embodiment, the inner side of the rotor 210 is connected with a connecting ring, the connecting ring and the rotor 210 can be in an integrated structure during production and manufacture, the end part of the transmission sleeve 220 props against the connecting ring, screws 211 are inserted into the connecting ring, the screws 211 are connected with the end part of the transmission sleeve 220, and the screws 211 are arranged on the connecting ring at intervals in a surrounding mode, so that the stability of the connection structure between the connecting ring and the transmission sleeve 220 can be further improved. During assembly, the rotor 210 is sleeved on the outer side of the transmission sleeve 220, the position, matched with the transmission sleeve 220 in the rotor 210, of the transmission sleeve 220 is limited by using the connecting ring on the inner side of the rotor 210, when the end part of the transmission sleeve 220 abuts against the connecting ring, the transmission sleeve 220 and the connecting ring are installed in place, at the moment, the screw 211 penetrates through the connecting ring and then is installed and fixed on the end part of the transmission sleeve 220, and synchronous connection between the rotor 210 and the transmission sleeve 220 can be achieved, rapid assembly of the rotor and the transmission sleeve can be achieved, and the connecting structure is stable.

As a further connection structure between the driving sleeve 220 and the air inlet cylinder 110, a second annular step 112 is disposed on the first annular step 111, a second bearing 113 is connected to the second annular step 112, and the driving sleeve 220 is connected to an inner ring of the second bearing 113. The second annular step 112 is a step structure extending around the axis of the air inlet barrel 110 on the step surface of the first annular step 111, after the inner ring of the second bearing 113 is sleeved outside the transmission sleeve 220, the transmission sleeve 220 and the second bearing 113 are installed into the air inlet barrel 110, at this time, the outer ring of the second bearing 113 can be embedded into the second annular step 112, and the second annular step 112 is utilized to limit the installation stroke of the second bearing 113, so that the second bearing 113 is stably connected between the air inlet barrel 110 and the transmission sleeve 220. In practical application, a third annular step is further disposed between the first annular step 111 and the second annular step 112, and the third annular step is also a step structure disposed around the inner side of the air inlet barrel 110, so that the first annular step 111, the second annular step 112 and the third annular step form a three-level step structure inside the air inlet barrel 110, and when the second bearing 113 is mounted on the second annular step 112, the outer ring of the second bearing 113 further has a limiting edge protruding along the radial direction, the limiting edge is disposed in the third annular step, and a connecting piece is driven into the third annular step on the limiting edge, so that the second bearing 113 is further fixed in the third annular step.

In practical applications, in order to ensure that the transmission sleeve 220 can rotate at a high speed, the second bearing 113 may be a bearing with a high rotation speed, such as an air bearing and a magnetic suspension bearing.

In order to facilitate the installation and positioning of the second bearing 113 on the outer side of the driving sleeve 220, a fourth annular step may be provided on the outer side of the driving sleeve 220, and the fourth annular step is a step structure protruding on the outer side of the driving sleeve 220 and extending around the axis of the driving sleeve 220, and when the inner ring of the second bearing 113 is connected to the outer side of the driving sleeve 220, the end portion of the second bearing 113 may abut against the fourth annular step, so that the second bearing 113 may be rapidly assembled and positioned on the outer side of the driving sleeve 220.

When the second bearing 113 is in operation, one end of the second bearing 113, which is close to the impeller 300, is provided with a second annular step 112 and a fourth annular step, which can limit the second bearing 113 from moving towards the direction close to the impeller 300, while in order to move the second bearing 113 away from the impeller 300, in this embodiment, the outer side of the transmission sleeve 220 is connected with a spacer 240, and the spacer 240 is connected to the outer side of the transmission sleeve 220 in an interference fit manner, and the spacer 240 is located between the inner ring of the second bearing 113 and the rotor 210. The spacer 240 can separate the inner ring of the second bearing 113 from the rotor 210, so that two ends of the second bearing 113 are limited by the second annular step 112 and the spacer 240 respectively, and the second bearing 113 can be effectively prevented from axially moving during operation, so that the stability of the whole operation is further improved.

After the stator 230 is installed in the first annular step 111 inside the air inlet barrel 110, in order to further locate the same, in this embodiment, a flange 250 is connected to an end of the air inlet barrel 110 away from the volute 100, and the flange 250 abuts against an end of the stator 230. The flange 250 may compress and fix the stator 230 within the first annular step 111, thereby further improving the structural stability of the stator 230 mounted to the air inlet cylinder 110. In practice, an encoder reading head may be provided on flange 250 to facilitate measuring the number of turns of rotor 210.

In the above embodiment, a port of the driving sleeve 220 away from the impeller 300 may be directly utilized as an air inlet, and in order to further improve the air intake, in this embodiment, an air inlet ring 260 is connected to the flange 250, one end of the air inlet ring 260 extends into the air inlet channel 221, and an inner diameter of the air inlet ring 260 gradually increases along a direction away from the air inlet channel 221. The structure in which the air inlet ring 260 gradually expands in a direction away from the impeller 300 increases the amount of air inlet introduced into the air inlet channel 221, thereby further improving fan efficiency. In practical applications, the main body of the air inlet ring 260 may be a planar ring structure, in which a connecting member is driven into the planar position to connect to the flange 250, and in which the inner side of the air inlet ring 260 is bent and extended toward the impeller 300 and extends into the air inlet channel 221, and the inner diameter enclosed at the bent and extended position gradually increases along the direction away from the air inlet channel 221, so as to form a flaring structure capable of better sucking from the periphery.

While the preferred embodiments of the present utility model have been illustrated and described, the present utility model is not limited to the embodiments, and various equivalent modifications and substitutions can be made by one skilled in the art without departing from the spirit of the present utility model, and these are intended to be included in the scope of the present utility model as defined in the appended claims.

Claims (10)

1. A kind of hole type servo structural centrifugal fan, characterized by: comprising the following steps:

the volute (100) is connected with an air inlet tube (110) on a side plate, and an air outlet (120) is arranged on a volute plate of the volute (100);

the driving assembly is connected in the air inlet barrel (110), the driving assembly is provided with a rotatable rotor (210), the inner side of the rotor (210) is synchronously connected with a transmission sleeve (220), and an air inlet channel (221) is axially arranged in the transmission sleeve (220);

and the impeller (300) is positioned in the volute (100), and the impeller (300) is synchronously connected with the transmission sleeve (220).

2. A hole pattern servo structured centrifugal fan as claimed in claim 1, wherein: the side plate, far away from the air inlet barrel (110), of the volute (100) is a mounting plate (130), and mounting holes (131) are formed in the mounting plate (130).

3. A hole pattern servo structured centrifugal fan as claimed in claim 2, wherein: one side of the mounting plate (130) positioned in the volute (100) is connected with a boss (140), and a first bearing (141) is connected between the boss (140) and the impeller (300).

4. A hole pattern servo structured centrifugal fan as claimed in claim 1, wherein: the two side plates of the volute (100) are connected with the air inlet cylinders (110), the two air inlet cylinders (110) are connected with the driving assemblies, and the transmission sleeves (220) in the driving assemblies are respectively and synchronously connected to two ends of the impeller (300).

5. A hole pattern servo structured centrifugal fan as claimed in claim 1, wherein: the driving assembly comprises a stator (230), a first annular step (111) is arranged at one end, far away from the volute (100), of the air inlet barrel (110), the stator (230) is connected in the first annular step (111), the rotor (210) is located in the stator (230), and the transmission sleeve (220) is rotationally connected to the inner side wall of the air inlet barrel (110).

6. A hole pattern servo structured centrifugal fan as set forth in claim 5, wherein: the inner side of the rotor (210) is connected with a connecting ring, the end part of the transmission sleeve (220) is propped against the connecting ring, a screw (211) is inserted into the connecting ring, and the screw (211) is connected with the end part of the transmission sleeve (220).

7. A hole pattern servo structured centrifugal fan as set forth in claim 5, wherein: the first annular step (111) is provided with a second annular step (112), a second bearing (113) is connected to the second annular step (112), and the transmission sleeve (220) is connected to the inner ring of the second bearing (113).

8. A hole pattern servo structured centrifugal fan as set forth in claim 7, wherein: and a spacer bush (240) is connected to the outer side of the transmission sleeve (220), and the spacer bush (240) is positioned between the inner ring of the second bearing (113) and the rotor (210).

9. A hole pattern servo structured centrifugal fan as set forth in claim 5, wherein: one end of the air inlet barrel (110) far away from the volute (100) is connected with a flange (250), and the flange (250) abuts against the end of the stator (230).

10. A hole pattern servo structured centrifugal fan as set forth in claim 9, wherein: the flange (250) is connected with an air inlet ring (260), one end of the air inlet ring (260) extends into the air inlet channel (221), and the inner diameter of the air inlet ring (260) gradually increases along the direction away from the air inlet channel (221).