Centrifugal fan

Abstract

The centrifugal fan comprises a volute installed on a foot stool, an impeller and a motor, and the specific installation structure of the motor and the volute is that a plurality of T-shaped grooves are formed in the outer wall of a machine shell of the motor at intervals in the circumferential direction, each T-shaped groove is formed in the axial direction of the motor, a connecting support is arranged in each T-shaped groove in a matched mode, and the T-shaped grooves are connected with the connecting supports in a matched mode. Each connecting support comprises a volute connecting part used for being fixedly connected with the volute, a guide part capable of being clamped into the corresponding T-shaped groove in a matched mode, and a motor connecting part extending towards the outer portion of the volute and used for being fixedly connected with a motor shell. The guide part of each connecting support is clamped into the corresponding T-shaped groove of the motor shell, the volute connecting part of each connecting support is fixed to the outer side wall of the volute, and the motor connecting part of each connecting support extends out of the volute and is fixedly connected to the motor shell through a locking mechanism, so that the motor is fixedly connected with the volute. The utility model has the advantage of convenient installation.

Description

TECHNICAL FIELD

[0001] The utility model relates to a fan technical field, concretely relates to a centrifugal fan. BACKGROUND

[0002] The centrifugal fan is an important air supply device, usually including the volute fixed on the foot stand, the volute with the air inlet and the air outlet, the impeller arranged in the inner cavity of the volute, the motor mounting hole installed on the volute and driving the impeller to rotate. When working, the motor rotates, drives the impeller to rotate at high speed, makes the gas enter the inner cavity of the volute from the axial air inlet, the impeller accelerates and changes the flow direction of the gas, and then converts the kinetic energy into the pressure potential energy of the gas, and rotates with the impeller, under the action of inertia, the gas is output from the air outlet along the radial direction, to achieve the purpose of conveying the gas.

[0003] The centrifugal fan currently used has the following shortcomings: (1) when the motor is installed in the volute, the motor installation is completed in the motor mounting hole of the volute, the installation and fixation of the motor are limited by the installation space between the motor mounting hole and the motor shell, which not only makes the installation inconvenient, but also causes the large shell motor with a size close to the motor mounting hole to be unable to be installed; (2) the foot stand and the volute are integrally connected and fixed, which limits the installation posture of the centrifugal fan and makes the installation inconvenient; (3) the side plate and the circumferential plate constituting the volute are welded and fixed, which makes the assembly inconvenient. CONTENT OF THE UTILITY MODEL

[0004] The utility model aims at providing a centrifugal fan convenient to install.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a centrifugal fan, including the volute installed on the foot stand, the volute has the air inlet and the air outlet, the inner cavity of the volute is provided with the impeller, the sidewall of the volute is provided with the motor mounting hole, the motor mounting hole is provided with the motor for driving the impeller to rotate, and the specific installation structure of the motor and the volute includes that a plurality of T-shaped grooves are arranged on the outer wall of the motor shell along the circumference and are spaced apart, each T-shaped groove is arranged along the motor axial direction, and one connecting support is respectively arranged in each T-shaped groove, each connecting support includes a volute connecting part for connecting and fixing with the volute, a guide part capable of being matched and clamped into the corresponding T-shaped groove, and a motor connecting part extending to the outside of the volute for connecting and fixing with the motor shell, the guide part of each connecting support is clamped into the corresponding T-shaped groove of the motor shell, the volute connecting part of each connecting support is fixed to the outer sidewall of the volute, and the motor connecting part of each connecting support extends out of the volute and is connected and fixed to the motor shell through the locking mechanism, so that the motor and the volute are connected and fixed.

[0006] Further, the centrifugal fan as claimed in the preceding, wherein: the specific connecting structure between each connecting bracket and the volute comprises: a plurality of first threaded holes are circumferentially spaced apart on the volute side wall at the edge of the motor mounting hole, a first through hole is provided on the volute connecting portion of the connecting bracket, when the connecting bracket is mounted to the T-shaped slot of the corresponding motor casing through the guide portion, the first through hole of the connecting bracket is just corresponding to one of the first threaded holes of the volute side wall, a first locking bolt is threaded into the corresponding first threaded hole through the first through hole, thereby connecting and fixing the connecting bracket and the volute.

[0007] Further, the centrifugal fan as claimed in the preceding, wherein: the specific connecting structure between each connecting bracket and the motor casing comprises: when the guide portion of the connecting bracket is inserted into the corresponding T-shaped slot of the motor casing and the volute connecting portion of the connecting bracket is tightly fixed to the outer side wall of the volute, the motor connecting portion of the connecting bracket is located outside the volute and simultaneously outside the T-shaped slot, a second through hole corresponding to the slot opening of the T-shaped slot is provided on the motor connecting portion of the connecting bracket, the head of a second locking bolt is placed in the corresponding T-shaped slot, and the rod portion of the second locking bolt is threaded with a locking nut after extending out of the second through hole of the motor connecting portion through the slot opening of the corresponding T-shaped slot, the locking nut is tightened to be locked and fixed with the second locking bolt to the corresponding T-shaped slot, thereby fixing the connecting bracket and the motor casing.

[0008] Further, the centrifugal fan as claimed in the preceding, wherein: the specific structure of the volute comprises: two side plates and a circumferential plate, the circumferential plate has an opening, the two side plates are respectively connected to the two sides of the circumferential plate to jointly form the inner cavity of the volute, the opening end of the circumferential plate and the corresponding outer edges of the two side plates jointly form the air outlet of the volute, the air inlet of the volute is provided on one of the two side plates, and the motor mounting hole of the volute is provided on the other side plate.

[0009] The specific connecting structure between the two side plates and the circumferential plate comprises: the two side edges of the circumferential plate are respectively bent to form clamping grooves, the edge of each side plate is bent to form a clamping edge capable of being inserted into the clamping groove of the corresponding side circumferential plate, the clamping edges of the two side plates are respectively inserted into the clamping grooves on the two sides of the circumferential plate, the outer edges of the clamping grooves on the two sides of the circumferential plate are respectively integrally extended and bent to form pressing portions, and the pressing portions are pressed on the corresponding side plates, thereby connecting and fixing the two side plates and the circumferential plate.

[0010] Further, the centrifugal fan as claimed in the preceding, wherein: a flange flange is respectively installed on the opening end of the circumferential plate constituting the air outlet of the volute and the corresponding outer edges of the two side plates, flange connectors are connected between adjacent flanges, the outer end faces of all flange connectors and the outer end faces of all flange flanges are flush, and the flange connectors and the flange flanges jointly constitute a connecting flange.

[0011] Further, the centrifugal fan as claimed in the preceding, wherein: the specific connection structure of the foot support and the volute comprises: a plurality of groups of second threaded holes are arranged on the side wall of the volute in the circumferential direction, a group of mounting holes are arranged on the foot support, the mounting holes of the foot support can correspond to a group of second threaded holes at any position of the volute, and a connecting bolt is threaded into the second threaded hole through the mounting hole.

[0012] Through the implementation of the technical scheme, the centrifugal fan has the following advantages: (1) the motor and the volute are connected and fixed through the connecting support, the connecting support and the motor casing are connected and fixed on the outside of the volute through the structural design of the connecting support and the T-shaped slot of the motor casing, the installation of the motor is no longer limited by the installation space between the motor mounting hole and the motor casing, the motor can be installed conveniently, and a large motor casing can be installed, and the installation is firm; (2) the foot support and the volute are designed in a split type, the position of the foot support on the volute can be adjusted freely, the foot support can be adjusted to adapt to different installation conditions of the volute, and the installation is more convenient; (3) the side plate and the circumferential plate of the volute are connected through a bending type connection structure, the connection structure does not need to be welded during assembly, and the assembly is more convenient; and (4) the end face of the connecting flange of the volute is flush, so that when the volute is connected to other equipment through the connecting flange, the volute and the other equipment can be connected in a sealed manner, air leakage gaps are avoided, and the stability of the centrifugal fan is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 A structure diagram of the centrifugal fan is shown in the utility model.

[0014] Figure 2 A structure diagram of the centrifugal fan is shown in the utility model. Figure 1 A structure diagram of the centrifugal fan is shown in the utility model.

[0015] Figure 3 A structure diagram of the centrifugal fan is shown in the utility model.

[0016] Figure 4 A structure diagram of the centrifugal fan is shown in the utility model. Figure 3 A structure diagram of the centrifugal fan is shown in the utility model.

[0017] Figure 5 A structure diagram of the centrifugal fan is shown in the utility model. Figure 2 An enlarged diagram of the A part shown in the utility model.

[0018] Figure 6 An enlarged diagram of the A part shown in the utility model. Figure 5 A bending structure diagram of the edge of the circumferential plate shown in the utility model.

[0019] Figure 7 A bending structure diagram of the edge of the circumferential plate shown in the utility model. Figure 5The flange connection and the flange edge are shown in the top view.

[0020] Figure 8 The perspective view of the connecting support.

[0021] Figure 9 The structural schematic view of the foot support.

[0022] Figure 10 The structural schematic view of the foot support installed at another position of the volute. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical scheme and advantages of the utility model more clearly, the utility model is further described in detail below by combining with the drawings and examples.

[0024] As Figure 1 , Figure 2 , Figure 9 , Figure 10 indicated, the centrifugal fan comprises a volute 2 installed on a foot support 1, the volute 2 is provided with an air inlet 3 and an air outlet 4, an impeller 5 is arranged in the inner cavity of the volute 2, a motor mounting hole 6 is arranged on the side wall of the volute 2, and a motor 7 for driving the impeller 5 to rotate is arranged at the motor mounting hole 6. Figure 5 , Figure 6 As indicated, the specific structure of the volute 2 comprises two side plates 211 and a circumferential plate 212, the circumferential plate 212 is provided with an opening, the two side plates 211 are respectively connected to the two sides of the circumferential plate 212 to jointly form the inner cavity of the volute, the two side plates 211 form two side walls of the volute, the opening end of the circumferential plate 212 and the corresponding outer edges of the two side plates 211 jointly form the air outlet 4 of the volute 2, the air inlet 3 of the volute 2 is arranged on one of the side plates, and the motor mounting hole 6 of the volute 2 is arranged on the other side plate 211; the specific connection structure of the two side plates 211 and the circumferential plate 212 comprises that the two side edges of the circumferential plate 212 are respectively bent to form clamping grooves 2121, the edge of each side plate 211 is bent to form a clamping edge 2111 capable of being inserted into the clamping groove 2121 of the corresponding side circumferential plate, the clamping edges 2111 of the two side plates 211 are respectively clamped into the clamping grooves 2121 on the two sides of the circumferential plate, the outer edges of the clamping grooves 2121 on the two sides of the circumferential plate are respectively integrally extended and bent outward to form pressing parts 2122, and the pressing parts 2122 are pressed on the corresponding side plates 211, so that the two side plates 211 and the circumferential plate 212 are connected and fixed, and the volute structure does not need to be welded during assembly, and the assembly is more convenient.

[0025] In actual volute assembly, the clamping edges 2111 of the two side plates 211 are clamped into the two side clamping grooves 2121 of the circumferential plate, and then the corresponding pressing parts 2122 of the two side clamping grooves 2121 are bent towards the corresponding side plates 211, so that the pressing parts 2122 are pressed on the corresponding side plates 211, thereby completing the assembly of the volute, and the whole assembly process does not need welding, and the assembly is more convenient;

[0026] As shown in Figure 3 , Figure 4 , Figure 8 The specific mounting structure of the motor 7 and the volute 2 comprises: a plurality of T-shaped grooves 8 are arranged on the outer wall of the motor shell of the motor 7 in a circumferential direction, each T-shaped groove 8 is arranged along the motor axial direction, and each T-shaped groove 8 is provided with a corresponding connecting bracket 9, each connecting bracket 9 comprises a volute connecting part 91 for connecting and fixing with the volute 2, a guide part 92 capable of being clamped into the corresponding T-shaped groove 8, and a motor connecting part 93 extending to the outside of the volute 2 and capable of being connected and fixed with the motor shell; the guide part 92 of each connecting bracket 9 is clamped into the corresponding T-shaped groove 8 of the motor shell, the volute connecting part 91 of each connecting bracket 9 is tightly fixed to the outer side wall of the volute side plate 211 where the motor mounting hole is located, and the motor connecting part 93 of each connecting bracket 9 extends out of the volute 2 and is connected and fixed to the motor shell through a locking mechanism, so that the motor 7 and the volute 2 are connected and fixed; after the above-mentioned mounting structure of the motor and the volute is adopted, the installation operation of connecting the connecting bracket with the motor shell and the installation operation of connecting the connecting bracket with the volute can be performed outside the volute, and the installation space between the motor mounting hole and the motor shell is no longer limited, which not only facilitates installation, but also enables large motor shells to be installed and firmly installed;

[0027] In the embodiment, the specific connection structure of each connecting bracket and the volute 2 comprises: a plurality of first threaded holes are arranged on the volute side plate 211 at the edge of the motor mounting hole 6 in a circumferential direction, a first through hole 911 is arranged on the volute connecting part 91 of the connecting bracket, when the connecting bracket is installed in the T-shaped groove 8 of the corresponding motor shell through the guide part 92, the first through hole 911 of the connecting bracket is just opposite to a first threaded hole of the volute side plate 211, a first locking bolt 10 is arranged in the corresponding first through hole and first threaded hole, and the rod part of the first locking bolt 10 is screwed into the corresponding first threaded hole after passing through the first through hole, so that the connecting bracket and the volute 2 are connected and fixed, which is convenient to operate, and the connecting bracket and the volute 2 can be separated to remove the motor by only loosening and removing the first locking bolt 10; when the motor 7 needs to be installed on the volute, the connecting bracket can be reconnected to the volute by only tightening the first locking bolt 10 again, so that the motor is fixed on the volute;

[0028] In the embodiment, the specific connection structure of each connecting bracket and the motor casing comprises: when the guide part 92 of the connecting bracket is clamped into the corresponding T-shaped slot 8 of the motor casing and the volute connecting part 91 of the connecting bracket is tightly fixed to the outer sidewall of the volute side plate 211 where the motor mounting hole is located, the motor connecting part 93 of the connecting bracket is located outside the volute and simultaneously outside the T-shaped slot 8, the second through hole 931 corresponding to the slot of the T-shaped slot 8 is arranged on the motor connecting part 93, the head of the second locking bolt 11 is arranged in the corresponding T-shaped slot 8 and the size of the head is larger than the size of the slot of the T-shaped slot, and the rod part of the second locking bolt 11 is threadedly connected with the locking nut 12 after the rod part extends out of the second through hole 931 of the motor connecting part 93 through the slot of the corresponding T-shaped slot 8, the locking nut 12 can be locked and fixed to the corresponding T-shaped slot 8 in cooperation with the head of the second locking bolt 11 when the locking nut 12 is screwed, so as to fix the connecting bracket and the motor 7 casing, the mounting structure of the connecting bracket and the motor casing is simple, when the operation is performed, the worker can make the connecting bracket separate from the motor casing by loosening the locking nut 12 outside the volute, and when the installation is performed, the operation is more convenient because the installation of the connecting bracket and the motor casing can be performed outside the volute.

[0029] In the embodiment, as shown in Figure 2 、 Figure 7 , a flange flange 13 is arranged at the opening end of the circumferential plate constituting the volute air outlet and the corresponding outer edge of the two side plates 211, a flange connecting piece 14 is connected between adjacent flange flanges 13, the outer end faces of all flange connecting pieces 14 and the outer end faces of all flange flanges 13 are flush, and the flange connecting pieces 14 and the flange flanges 13 jointly constitute a connecting flange 18, so that when the volute is connected to other equipment through the connecting flange 18, the volute and other equipment can be sealingly connected, there is no air leakage gap, and the stability of the centrifugal fan is ensured.

[0030] In the embodiment, as shown in Figure 1 、 Figure 9 、 Figure 10 , the specific connection structure of the foot support 1 and the volute 2 comprises: a plurality of groups of second threaded holes 15 are arranged on the sidewall of the side plate 211 of the volute 2 where the motor mounting hole is located in the circumferential direction, a group of mounting holes are arranged on the foot support 1, the mounting hole 16 of the foot support 1 can correspond to a group of second threaded holes 15 at any position of the volute 2, and a connecting bolt 17 is arranged in the corresponding second threaded hole 15 and the mounting hole 16, the rod part of the connecting bolt 17 is threadedly connected to the second threaded hole 15 after the rod part passes through the mounting hole 16, so as to fix the foot support and the volute; in actual installation, the installation is more convenient because the position of the foot support 1 can be adjusted to adapt to different volute installation conditions.

[0031] The utility model discloses the advantages are: (1) motor and volute are connected fixed through connecting support, through the structural design of connecting support and motor casing T -shaped slot, the installation fixed operation of connecting support and motor casing is connected in volute outside, and the installation fixed operation of connecting support and volute, the installation of motor is no longer restricted by the installation space between motor mounting hole and motor casing, not only convenient to install, but also can install the big casing motor of size close to motor mounting hole, and firm installation, (2) the foot stool is used split type design with volute, can freely adjust the position of foot stool on volute, can through adjusting the position of foot stool 1 to adapt to different volute installation working condition, and installation is more convenient, (3) the side plate and circumference plate between the volute adopt the bending type connecting structure, and this connecting structure does not need to weld when assembling, and assembling is more convenient, (4) the end face of the connecting flange of volute is flush, so when volute is butted on other equipment through connecting flange, can guarantee volute and other equipment sealed connection, will not exist air leakage gap, guarantees the use stability of centrifugal fan.

[0032] The above only is the preferred embodiment of the utility model, is not any other form's limit to the utility model, and any modification or equivalent change made according to the technical essence of the utility model still belongs to the range of the utility model claimed to protect.

Claims

1. A centrifugal fan, comprising a volute mounted on a bracket, the volute having an air inlet and an air outlet, an impeller disposed within the inner cavity of the volute, a motor mounting hole disposed on the side wall of the volute, and a motor for driving the impeller to rotate disposed at the motor mounting hole, characterized in that: The specific installation structure of the motor and the volute comprises: a plurality of T-shaped slots are arranged on the outer wall of the motor shell in a circumferential direction, each T-shaped slot is arranged along the axial direction of the motor, and each T-shaped slot is provided with a connecting bracket, each connecting bracket comprises a volute connecting part for connecting and fixing the volute, a guide part capable of being fitted into the corresponding T-shaped slot, and a motor connecting part extending to the outside of the volute for connecting and fixing the motor shell; the guide part of each connecting bracket is fitted into the corresponding T-shaped slot of the motor shell, the volute connecting part of each connecting bracket is fixed to the outer side wall of the volute, and the motor connecting part of each connecting bracket extends out of the volute and is connected and fixed to the motor shell by a locking mechanism, so that the motor and the volute are connected and fixed.

2. A centrifugal fan as claimed in claim 1, characterized in that: The specific connection structure of each connecting bracket and the volute comprises: a plurality of first threaded holes are arranged on the side wall of the volute at the edge of the motor mounting hole in a circumferential direction, a first through hole is arranged on the volute connecting part of the connecting bracket, when the connecting bracket is installed in the T-shaped slot of the corresponding motor shell through the guide part, the first through hole of the connecting bracket is just opposite to a first threaded hole of the side wall of the volute, a first locking bolt is arranged in the corresponding first through hole and first threaded hole, and the rod part of the first locking bolt is threadedly connected to the corresponding first threaded hole after passing through the first through hole, so that the connecting bracket and the volute are connected and fixed.

3. A centrifugal fan as claimed in claim 1, characterized in that: The specific connection structure of each connecting bracket and the motor shell comprises: when the guide part of the connecting bracket is fitted into the corresponding T-shaped slot of the motor shell and the volute connecting part is tightly fixed to the outer side wall of the volute, the motor connecting part of the connecting bracket is located outside the volute and outside the T-shaped slot, a second through hole corresponding to the slot opening of the T-shaped slot is arranged on the motor connecting part of the connecting bracket, the head part of a second locking bolt is arranged in the corresponding T-shaped slot, the rod part of the second locking bolt is threadedly connected with a locking nut after extending out of the second through hole of the motor connecting part through the slot opening of the corresponding T-shaped slot, and the locking nut is tightened to be matched with the second locking bolt to lock and fix the motor connecting part in the corresponding T-shaped slot, so that the connecting bracket and the motor shell are fixed.

4. A centrifugal fan as claimed in claim 1 or 2 or 3, characterized in that: The specific structure of the volute comprises: two side plates and a circumferential plate, the circumferential plate has an opening, the two side plates are connected to the two sides of the circumferential plate to jointly form an inner cavity of the volute, the opening end of the circumferential plate and the corresponding outer edges of the two side plates jointly form an air outlet of the volute, an air inlet of the volute is arranged on one of the two side plates, and a motor mounting hole of the volute is arranged on the other side plate. The specific connection structure of the two side plates and the circumferential plate comprises: the two side edges of the circumferential plate are respectively bent to form clamping grooves, the edges of each side plate are bent to form clamping edges capable of being inserted into the clamping grooves of the corresponding side circumferential plate, the clamping edges of the two side plates are respectively clamped into the clamping grooves on the two sides of the circumferential plate, and a pressing part is integrally extended and bent outward on the outer edge of each clamping groove on the two sides of the circumferential plate, and the pressing part is pressed on the corresponding side plate, so that the two side plates and the circumferential plate are connected and fixed.

5. A centrifugal fan as claimed in claim 4, characterised in that: A flange flange is installed on the opening end of the circumferential plate constituting the volute air outlet and the corresponding outer edge of the two side plates, a flange connector is connected between adjacent flange flanges, the outer end faces of all flange connectors and the outer end faces of all flange flanges are flush, and the flange connectors and the flange flanges jointly constitute a connecting flange.

6. A centrifugal fan as claimed in claim 1 or 2 or 3, characterized in that: The specific connection structure of the foot stool and the volute comprises that a plurality of groups of second threaded holes are arranged on the side wall of the volute in the circumferential direction, a group of mounting holes are arranged on the foot stool, the mounting holes of the foot stool can correspond to a group of second threaded holes at any position of the volute, and a connecting bolt is threaded in the corresponding second threaded hole and the mounting hole.

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