Motor mounting structure applied to centrifugal fan and mounting mode

Abstract

The motor mounting structure comprises a first volute, a side plate, a second volute, a third volute and an assembling mechanism, the first volute is connected with the side plate, the third volute is assembled outside the second volute, a stator assembly is assembled inside the third volute, and the assembling mechanism is connected with the side plate. A fan is assembled on the top of an inner cavity of the third volute. According to the motor mounting structure applied to the centrifugal fan and the mounting mode, noise and abrasion caused by loosening or vibration are effectively prevented, the strength and durability of the connecting part are enhanced by optimizing material selection and structural design, meanwhile, the influence of dust on the device is avoided, and the service life of the device is prolonged. And a traditional bolt connecting mode is not needed for fixing, so that the assembling speed of the device is greatly increased, the overall assembling speed of the device is greatly increased, workers can conveniently disassemble and maintain the whole device, and the overall using effect of the device is improved.

Description

TECHNICAL FIELD

[0001] The application relates to the field of motor installation, in particular to a motor installation structure and installation mode applied in a centrifugal fan. BACKGROUND

[0002] The centrifugal fan is a machine for improving gas pressure and sending gas by input mechanical energy. According to the principle of kinetic energy conversion into potential energy, the high-speed rotating impeller accelerates the gas, then decelerates and changes the flow direction, so that the kinetic energy is converted into potential energy (pressure). In a single-stage centrifugal fan, the gas enters the impeller from the axial direction, and the gas changes into the radial direction when passing through the impeller, and then enters the diffuser. In the diffuser, the gas changes the flow direction and the pipe cross-sectional area increases, so that the gas flow decelerates, and the kinetic energy is converted into pressure energy. In the prior art, the centrifugal fan is widely used in industrial and civil fields as a gas conveying device, and the design and layout of the internal motor of the centrifugal fan have a crucial influence on the overall performance and installation convenience of the centrifugal fan. Traditionally, in order to facilitate installation and maintenance, an internal rotor motor driving structure is usually used in the centrifugal fan. This design simplifies the installation process of the motor to a certain extent, so that the assembly and debugging work of the centrifugal fan can be carried out smoothly. However, the application of the internal rotor motor also brings a series of problems that cannot be ignored. First, due to the structural characteristics of the internal rotor motor, its volume is relatively large, which directly leads to the increase of the overall size of the centrifugal fan. In a narrow or limited space, such a large-sized centrifugal fan is often difficult to find a suitable installation position, thereby limiting its application range. Second, the exposed part of the internal rotor motor is relatively large, which is easy to become a gathering point of dust, sundries and impurities. These impurities not only affect the heat dissipation performance of the motor, but also may cause additional friction and wear during the operation of the motor, thereby affecting the operation stability and service life of the centrifugal fan. With the increasing requirements of modern industry and civil field on the performance of the centrifugal fan, the traditional internal rotor motor driving structure has been difficult to meet the growing needs of energy saving, environmental protection and intelligentization. Therefore, how to overcome the defects of the existing internal motor driving structure of the centrifugal fan, such as large size and easy accumulation of dust, has become a key problem to be solved in the current centrifugal fan technical field. SUMMARY

[0003] In view of the deficiencies of the prior art, the application provides a motor installation structure and installation mode applied in a centrifugal fan, to solve the problem that the exposed part of the internal rotor motor is relatively large and easy to become a gathering point of dust, sundries and impurities. These impurities not only affect the heat dissipation performance of the motor, but also may cause additional friction and wear during the operation of the motor, thereby affecting the operation stability and service life of the centrifugal fan.

[0004] To achieve the above object, the application provides the following technical scheme: a motor mounting structure applied to a centrifugal fan, comprising a first volute, a side plate, a stator assembly, a second volute and a third volute, the first volute is connected with the side plate, and the third volute is assembled outside the second volute, the stator assembly is assembled inside the third volute, a fan is assembled at the top of the inner cavity of the third volute, and the stator assembly is assembled inside the fan, a limiting groove is connected outside the stator assembly, and a support is assembled inside the limiting groove; An annular limiting groove is processed on the shell of the stator assembly, the support is embedded in the annular limiting groove, the top of the support is fixed on the inner wall of the third volute through a screw, the bottom of the support is connected with the iron core in the stator assembly through a toothed engagement, the fan is a centrifugal blade structure, the fan is connected with the second volute through a motor shaft and a bearing seat, and the stator assembly is located on the inner side of the axial direction of the fan.

[0005] Preferably, the outer sides of the side plate are connected with assembling mechanisms, the assembling mechanism comprises a long connecting arm, a spherical bearing is sleeved outside the long connecting arm, a connecting rod is connected with the spherical bearing through a hinge outside the spherical bearing, the other end of the connecting rod is connected with a limiting block through a hinge, and a cross arm is inserted outside the long connecting arm. A limiting mechanism is assembled inside the second volute, the limiting mechanism comprises a limiting tube, a piston block is slidably connected inside the limiting tube, a second spring is connected between the piston block and the limiting tube, long tubes are communicated on the outer sides of the limiting tube, a piston rod is slidably connected inside the long tube, and a snap ring is sleeved outside the long tube.

[0006] The first volute and the second volute can form a complete shell, the side plate can be assembled inside the first volute and the second volute, and is used for heat dissipation of the inside of the device, the inside of the side plate is embedded with a filter core plate, dust outside can be filtered and intercepted through the filter core plate, so that the electronic components in the inside of the device are prevented from being damaged, the third volute can support the stator assembly, the third volute and the stator assembly are combined into a motor device commonly used in the prior art, the device as a whole is driven, and the fan is driven to rotate and transmit power; meanwhile, the long connecting arm can drive the spherical bearing to transmit power, the spherical bearing can prevent the long connecting arm from affecting the connecting rod when the long connecting arm rotates, the long connecting arm can drive the limiting block to transmit power through the connecting rod when the long connecting arm is pulled, the guide arm can guide the spherical bearing to avoid rotation of the spherical bearing, the cross arm can fix the position of the long connecting arm, and the stability of the device as a whole is improved; in addition, the piston block can move inside the limiting tube to generate airflow, the airflow can enter the inside of the long tube to drive the piston rod to move, the piston rod and the piston block are provided with a guide block outside, the guide block improves the stability of the device when the device moves as a whole, and the second spring can make the piston block return after movement.

[0007] Preferably, the first volute and the second volute are provided with assembly grooves on the outer sides, and rubber sleeves are embedded in the inner cavities of the assembly grooves.

[0008] Preferably, the assembly grooves facilitate the accommodation and assembly of the side plates, and the rubber sleeves improve the tightness between the side plates, thereby improving the stability of the device as a whole and preventing the side plates from shaking after assembly.

[0009] Preferably, the long connecting arm is inserted into the outer side of the side plate, the limiting block is in sliding connection with the side plate, a slot is provided on the outer side of the side plate and matched with the long connecting arm, the limiting tube is connected with the second volute, a curved groove is provided in the inner side of the long tube, the curved groove is in sliding connection with the piston rod, and the clasp is connected with the inner cavity of the first volute. Preferably, C-shaped tubes are communicated with the back surfaces of the first volute and the second volute, first buckles are assembled at the two ends of the C-shaped tube on the outer side of the first volute, second buckles are assembled at the two ends of the C-shaped tube on the outer side of the second volute, and the two groups of C-shaped tubes can form a complete pipeline, thereby facilitating the connection with external devices, the second buckles can be combined with the first buckles to preliminarily fix the first volute and the second volute, and the stability of the subsequent fixing of the first volute and the second volute is improved.

[0010] Preferably, heat dissipation plates are assembled in the inner cavities of the second volutes, and holes are uniformly arranged on the outer sides of the heat dissipation plates, and wire mesh covers are embedded in the holes. The heat dissipation plates in cooperation with the wire mesh covers can filter and intercept external airflows, thereby preventing external dust from entering the inner side of the device and affecting the smoothness of the movement of the device as a whole.

[0011] Preferably, slide rail grooves are provided on the outer sides of the second volute and the first volute, and anti-skid pads are embedded in the inner cavities of the slide rail grooves. After the assembly of the first volute and the side plates is completed, the slide rail grooves can quickly clamp the device together with external devices, and the anti-skid pads can improve the stability of the device as a whole and prevent shaking after assembly.

[0012] Preferably, a filter core plate is provided on the upper end of the third volute, the filter core plate is located directly above the stator assembly, and a ventilation mesh cover is embedded on the outer side of the filter core plate. The filter core plate can ventilate the device as a whole, improve the heat dissipation effect of the stator assembly during work, and prevent the stator assembly from reducing the work efficiency due to overheating.

[0013] Preferably, the first volute and the second volute are externally provided with clamping grooves matched with the limiting blocks, and the limiting blocks are externally connected with guiding long blocks, the inner cavity of the second volute is provided with a track groove matched with the guiding long block, the track groove is slidingly connected with the guiding long block, the track groove can guide the guiding long block to move linearly, and the clamping groove can cooperate with the limiting block to quickly fix the side plate as a whole.

[0014] Preferably, the spherical bearings are externally uniformly provided with guiding arms, the guiding arms are inserted into the outside of the side plate, the long connecting arms are externally uniformly provided with first springs, and the outside of the side plate is uniformly provided with grooves matched with the first springs, the grooves are connected with the first springs, the guiding arms can guide the spherical bearings to avoid rotation of the spherical bearings during movement, and the first springs can drive the long connecting arms to quickly return after being released from the fixation.

[0015] On the other hand, the application also provides a motor mounting method applied to a centrifugal fan, comprising: S1: component inspection First, the first volute, the side plate, the second volute and the third volute are detected to avoid defects such as burrs, obvious shrinkage marks and material defects on the outside of the device, and the stator assembly is detected to be free of pores and sand eyes on the surface; S2: base installation First, the first volute is fixed by a clamp, then the second volute is placed on the upper end of the first volute and the position is corrected, and the second volute and the first volute are fixed by cooperation of the second buckle and the first buckle, and the long pipe inside the first volute and the second volute is inserted into the inside of the clamping ring; S3: stator assembly The third volute is fixed, the stator assembly is assembled in the inside of the third volute, the PCB circuit board assembly and the zinc alloy frame are riveted in place, the winding stator in the inside of the stator assembly and the bonding surface of the zinc alloy are coated with anaerobic glue, and the stator assembly is subjected to virtual welding, missed welding and conductivity detection; S4: complete assembly The assembled third volute and the second volute are assembled and fixed by bolts, the side plate is inserted into the inside of the assembly groove, the long connecting arm is moved and rotated by ninety degrees, the cross arm is clamped on the outside of the side plate, the long connecting arm drives the connecting rod through the spherical bearing, the limiting block is finally inserted into the inside of the clamping groove and the limiting pipe, the limiting pipe is inserted, the piston block is driven to cooperate with the limiting pipe to generate airflow, the airflow enters the inside of the long pipe, the movement of the piston rod is pushed, the long pipe is clamped on the outside of the clamping ring, and finally the assembly and fixation of the device as a whole are completed.

[0016] Preferably, the fan is subjected to a high-temperature test before use: the fan is placed in an environment of 90 DEG C for 4 hours, and then placed at room temperature for 1 hour, to ensure that the fan 42 is not deformed externally, and that the dynamic unbalance is less than or equal to 0.3 g, the end face runout on both sides is less than or equal to 0.3 mm, and the upper disc runout is less than or equal to 0.3 mm; after the high-temperature test, a low-temperature test is performed: the fan is placed in an environment of -20 DEG C for 4 hours, and then placed at room temperature for 1 hour, to ensure that the fan is not deformed externally, the dynamic unbalance is less than or equal to 0.3 g, the end face runout on both sides is less than or equal to 0.3 mm, and the upper disc runout is less than or equal to 0.3 mm; finally, a cold and hot impact test is performed: the fan is placed at a low temperature of -15 DEG C for 30 minutes, and then placed at a high temperature of 75 DEG C for 30 minutes, and the cycle is repeated for 4 hours, and the high-temperature and low-temperature conversion time is not greater than 20 minutes, to ensure that the dynamic unbalance is less than or equal to 0.15 g, the end face runout on both sides is less than or equal to 0.3 mm, the upper disc runout of the fan is less than or equal to 0.3 mm, the flame retardant level of the fan is UL94-V0, and the requirements of the RoHS and REACH directives are met.

[0017] In summary, the application provides a motor mounting structure and mounting method applied in a centrifugal fan, which has the following advantages: The motor mounting structure and mounting method applied in the centrifugal fan, by the third volute and the stator assembly arranged outside, the stator assembly, the annular limiting groove and the bracket are matched, the top of the bracket is fixed on the inner wall of the third volute through screws, and the fan is connected with the second volute through the motor shaft and the bearing seat, so that the volume of the connection part between the traditional motor and the centrifugal impeller is greatly reduced, the overall structure of the centrifugal fan is more compact, the flexible installation and layout in a narrow or complex space are facilitated, and the motor driving efficiency is effectively improved. The third volute and the stator assembly can be more closely combined with the fan, the loss in the energy transmission process is reduced, and the overall performance of the centrifugal fan is enhanced. The connection structure between the third volute and the stator assembly and the first volute and the second volute is carefully designed, the close cooperation of the device is ensured, the noise and wear caused by loosening or vibration are effectively prevented, the strength and durability of the connection part are enhanced by optimizing the material selection and structure design, and the influence of dust on the device is avoided. The motor mounting structure and mounting method applied in the centrifugal fan, by the added assembly mechanism, when the side plate is assembled with the first volute and the second volute, the position of the side plate is quickly fixed through the cooperation of the long connecting arm and the spherical bearing, and the traditional bolt connection mode is not needed, so that the assembly speed of the device is greatly improved. The motor mounting structure and mounting mode applied to the centrifugal fan, through the added limiting mechanism, when the fixing of the side plate of the assembling mechanism is completed, the limiting mechanism is automatically driven to move as a whole, the first volute and the second volute are quickly connected, the assembling speed of the whole device is greatly improved, the staff can conveniently disassemble and maintain the whole device, and the use effect of the whole device is improved. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is the overall display diagram of the application.

[0019] Figure 2 It is the explosion schematic diagram of the application.

[0020] Figure 3 It is the third volute internal schematic diagram of the application.

[0021] Figure 4 It is the assembly schematic diagram of the application.

[0022] Figure 5 It is the stator assembly external schematic diagram of the application.

[0023] Figure 6 It is the side plate external schematic diagram of the application.

[0024] Figure 7 It is the assembling mechanism external schematic diagram of the application.

[0025] Figure 8 It is the long pipe partial sectional view of the application.

[0026] Figure 9 It is the limiting pipe partial sectional view of the application.

[0027] Figure 10 It is the back surface schematic diagram of the assembling mechanism of the application.

[0028] Explanation of reference signs: 1, first volute; 11, assembling groove; 12, C-shaped pipe; 13, first buckle; 2, side plate; 3, second volute; 31, second buckle; 32, heat dissipation plate; 33, sliding rail groove; 4, third volute; 41, filter core plate; 42, fan; 5, stator assembly; 51, support; 52, limiting groove; 6, assembling mechanism; 61, long connecting arm; 62, spherical bearing; 63, guide arm; 64, cross arm; 65, connecting rod; 66, limiting block; 67, guide long block; 68, first spring; 7, limiting mechanism; 71, limiting pipe; 72, piston block; 73, second spring; 74, long pipe; 75, bent groove; 76, snap ring; 77, piston rod. DETAILED DESCRIPTION

[0029] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be described clearly and completely. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0030] The present application provides a technical solution, please refer to Figure 1 、 Figure 2 、 Figure 3 and Figure 4 , a motor mounting structure applied in a centrifugal fan, comprising a first volute 1, a side plate 2, a stator assembly 5, a second volute 3, a third volute 4 and a rotor assembly, the first volute 1 and the side plate 2 are connected, and the third volute 4 is assembled outside the second volute 3, the stator assembly 5 is assembled inside the third volute 4, the inner cavity top of the third volute 4 is assembled with a fan 42, and the stator assembly 5 is assembled inside the fan 42, the outside of the stator assembly 5 is connected with a limiting groove 52, and the limiting groove 52 is assembled with a bracket 51 inside. In the present embodiment, the stator assembly 5 and the rotor assembly are magnetically suspended and matched with each other, and the air gap therebetween is in the range of 0.2-2.0 mm.

[0031] Please refer to Figure 5 and Figure 6 , when the first volute 1 and the second volute 3 are combined together, a shell with complete structure and good sealing performance can be formed, the side plate 2 is assembled inside the first volute 1 and the second volute 3, which not only plays a role of separation and support, an interception filter element is embedded inside the air duct between the first volute 1 and the second volute 3, which separates the air wheel shell side from the air inlet shell side from each other, so as to achieve the effect of filtering and purifying, the third volute 4 can provide stable support for the stator assembly 5, the third volute 4 can support the stator assembly 5, the third volute 4 and the stator assembly 5 are combined into a motor device commonly seen in the prior art, which provides driving for the whole device, and drives the fan 42 to rotate and transmit power.

[0032] The shell of the stator assembly 5 is processed with an annular limiting groove, a bracket is embedded in the annular limiting groove, the top of the bracket is fixed on the inner wall of the third volute 4 through a screw, and the bottom of the bracket is connected with the iron core in the stator assembly through a toothed engagement, the fan 42 is a centrifugal blade structure, the fan 42 is connected with the second volute 3 through a motor shaft and a bearing seat, and the stator assembly 5 is located inside the axial direction of the fan 42. In the present embodiment, the bracket can be made of aluminum alloy. Meanwhile, in the present embodiment, the stator core inside the stator assembly 5 can be of a twelve-slot ten-pole or twelve-slot fourteen-pole structure.

[0033] Please refer to Figure 7 and Figure 8The outer sides of the side plate 2 are provided with assembly mechanisms 6, which improve the flexibility and stability of the overall structure, and the assembly mechanisms 6 comprise long connecting arms 61, which ensure the firmness of the connection and also take into account the convenience of operation, the outer sides of the long connecting arms 61 are sleeved with spherical bearings 62, and the outer sides of the spherical bearings 62 are connected with connecting rods 65 through hinge connection structures. The connecting rods 65 act as connecting bridges, and the other ends of the connecting rods 65 are also connected with limiting blocks 66 through hinge connections, which improves the stability of the structure and also facilitates adjustment according to actual needs. A long slot that is matched with the long connecting arms 61 is provided on the outer side of the side plate 2, which ensures that the long connecting arms 61 can be accurately inserted into place. The outer sides of the long connecting arms 61 are fixedly inserted with cross arms 64, which provides additional support for the assembly mechanisms 6 and also enhances the stability of the assembly mechanisms 6 when they are subjected to external forces. There are at least three groups of connecting rods 65 on the outer sides of each assembly mechanism 6, and the lengths of each group of connecting rods 65 are different, so that the assembly mechanisms 6 can adapt to different distances between the side plate 2 and the first volute 1, thereby improving the clamping stability of the side plate 2 and the first volute 1.

[0034] The long connecting arms 61 can drive the spherical bearings 62 to perform transmission operations. Through the unique structure of the spherical bearings 62, the adverse effects of the long connecting arms 61 on the connecting rods 65 during rotational motion are effectively avoided. When the long connecting arms 61 are pulled by external forces, the power can be smoothly transmitted to the spherical bearings 62, and then through the precise fitting of the spherical bearings 62, the connecting rods 65 and the limiting blocks 66 connected thereto are indirectly driven to perform synchronous transmission. The spherical bearings 62 effectively disperse and absorb lateral forces and vibrations in rotational motion through their spherical contact surface design, thereby protecting the connecting rods 65 from damage. In order to ensure the stability and accuracy of the spherical bearings 62 during transmission, the guide arms 63 precisely guide and control the spherical bearings 62, limiting the rotation of the spherical bearings 62 in unintended directions. The cross arms 64 effectively fix the long connecting arms 61 through their solid structure and precise positioning ability.

[0035] Please refer to Figure 9 and Figure 10 , the inside of the second volute 3 is provided with a limiting mechanism 7, the limiting mechanism 7 comprises a limiting tube 71, the limiting tube 71 is connected with the second volute 3, a piston block 72 is slidably connected inside the limiting tube 71, a plurality of second springs 73 are connected between the piston block 72 and the limiting tube 71, long tubes 74 are communicated on the outer sides of the limiting tube 71, a bent groove 75 is provided inside the long tube 74, a piston rod 77 is slidably connected inside the bent groove 75, a snap ring 76 is sleeved outside the long tube 74, the snap ring 76 is connected with the inner cavity of the first volute 1, the limiting tube 71 is square and is assembled by welding at the inner cavity side wall of the second volute 3, the snap ring 76 is welded at the inner cavity side wall of the first volute 1, and when the first volute 1 and the second volute 3 are combined, the limiting tube 71 corresponds to the snap ring 76.

[0036] When the piston block 72 moves within the limiting tube 71, the movement will induce and generate a directed airflow. The airflow is then guided into the interior of the long tube 74, which serves as a channel for airflow transmission, transferring the airflow energy to the piston rod 77, thereby driving the piston rod 77 to move, and the piston rod 77 is equipped with a guide block on the outside of the piston block 72. The guide block effectively limits the deviation of the piston block 72 and the piston rod 77 in unintended directions, ensuring the stability and reliability of the entire device during high-speed or high-load movement. After the piston block 72 completes a movement, the second spring 73 will automatically release its stored energy, pushing the piston block 72 back to the initial position quickly and accurately, preparing for the next movement. The limiting tube 71 and the interior of the long tube 74 are in communication and both store hydraulic oil, which can then drive the piston rod 77 inside the long tube 74 to slide when the piston block 72 is driven.

[0037] The first volute 1 and the second volute 3 are both provided with assembly grooves 11 on the outside, and rubber sleeves are embedded in the inner cavities of the assembly grooves 11. The interiors of the two assembly grooves 11 are adapted to the outside of the side plate 2, and the assembly grooves 11 facilitate the accommodation and assembly of the side plate 2. The rubber sleeves improve the tightness between the side plate 2, thereby improving the stability of the entire device and preventing the side plate 2 from shaking after assembly.

[0038] The back of the first volute 1 and the second volute 3 are both connected with C-shaped tubes 12, the two ends of the C-shaped tube 12 on the outside of the first volute 1 are equipped with first buckles 13, and the two ends of the C-shaped tube 12 on the outside of the second volute 3 are equipped with second buckles 31. The two groups of C-shaped tubes 12 can form a complete pipeline, thereby facilitating connection with external devices. The second buckles 31 can be combined with the first buckles 13 to preliminarily fix the first volute 1 and the second volute 3, thereby improving the stability of the subsequent fixation of the first volute 1 and the second volute 3.

[0039] The inner cavity of the second volute 3 is equipped with a heat sink 32, and the outside of the heat sink 32 is uniformly provided with holes. The inside of the holes is embedded with a wire mesh cover. The heat sink 32 is made of high thermal conductivity material, which can effectively absorb and disperse the heat generated by electronic components, and then transfer the heat to the external environment through convection or radiation, thereby achieving the effect of heat dissipation. The outside of the heat sink 32 of the second volute 3 is uniformly provided with a series of holes. The design of these holes is to allow external airflow to smoothly enter the interior of the volute assembly to enhance the heat dissipation effect. However, in order to prevent external dust and impurities from entering the device with the airflow and causing potential damage to electronic components, a wire mesh cover is embedded in the inside of the holes, which can effectively filter and intercept dust particles in the airflow.

[0040] The second volute 3 and the outside of the first volute 1 are both provided with slide rail grooves 33, the inner cavities of the slide rail grooves 33 are embedded with anti-skid pads, the slide rail grooves 33 can quickly clamp the first volute 1 and the side plate 2 together with external devices after assembly, and the anti-skid pads can improve the stability of the device as a whole to avoid shaking after assembly.

[0041] The third volute 4 is provided with a filter core plate 41 at the upper end, the filter core plate 41 is arranged directly above the stator assembly 5, forming a direct and effective heat dissipation channel, ensuring that the stator assembly 5 can dissipate heat in time during operation, thereby maintaining its high-efficiency and stable operation state, the outside of the filter core plate 41 is embedded with a ventilation mesh cover, enhancing the ventilation effect of the filter core plate 41 and preventing external debris from entering, ensuring the smoothness of the heat dissipation channel. The use of the ventilation mesh cover not only improves the heat dissipation efficiency, but also increases the safety and reliability of the device. The filter core plate 41 can guide air flow to form effective heat dissipation airflow, thereby improving the heat dissipation effect of the stator assembly 5 during operation. This avoids the problem of reduced efficiency caused by overheating of the stator assembly 5, ensuring that the device can maintain high-efficiency and stable operation under various working conditions.

[0042] The outside of the first volute 1 and the second volute 3 are both provided with clamping grooves matched with the limiting blocks 66, and the outside of the limiting blocks 66 is connected with guide long blocks 67. The inner cavity of the second volute 3 is provided with a track groove matched with the guide long blocks 67, the track groove is in sliding connection with the guide long blocks 67, the track groove can guide the guide long blocks 67 to move linearly, and the clamping grooves can cooperate with the limiting blocks 66 to quickly fix the side plate 2 as a whole.

[0043] The outside of the spherical bearing 62 is uniformly provided with guide arms 63, the guide arms 63 are movably inserted into the outside of the side plate 2, the outside of the long connecting arm 61 is uniformly provided with first springs 68, and the outside of the side plate 2 is uniformly provided with grooves matched with the first springs 68, the grooves are connected with the first springs 68, the guide arms 63 can guide the spherical bearing 62 to avoid rotation of the spherical bearing 62 during movement, and the first springs 68 can drive the long connecting arm 61 to quickly return after being released from fixation.

[0044] On the other hand, the embodiment of the present application also provides a motor installation method applied in a centrifugal fan, comprising: S1: component inspection First, the first volute 1, the side plate 2, the second volute 3 and the third volute 4 are detected to avoid defects such as burrs, obvious shrinkage marks and material defects on the outside of the device, and the stator assembly 5 is also detected to be free of surface pores and sand eyes; S2: base installation First, the first volute 1 is fixed by a clamp, and the second volute 3 is placed on the upper end of the first volute 1, and the position is corrected, and the second volute 3 and the first volute 1 are fixed by the cooperation of the second buckle 31 and the first buckle 13, and the long tube 74 in the first volute 1 and the second volute 3 is inserted into the inside of the clasp ring 76; S3: Stator assembly The third volute 4 is fixed, and the stator assembly 5 is assembled in the inside of the third volute 4, the PCB circuit board assembly is riveted to the zinc alloy frame, the winding stator in the stator assembly 5 is coated with anaerobic glue on the combined surface of the zinc alloy, and the stator assembly 5 is subjected to virtual welding, leakage welding and conductivity detection; S4: Complete assembly The assembled third volute 4 and the second volute 3 are assembled and fixed by bolts, the side plate 2 is inserted into the inside of the assembly groove 11, the long connecting arm 61 is pulled outward to move and rotate by 90 degrees, the cross arm 64 is clamped on the outer surface of the side plate 2, the long connecting arm 61 drives the connecting rod 65 through the spherical bearing 62, and finally drives the limiting block 66 to be inserted into the inside of the clamping groove and the limiting tube 71, and the limiting tube 71 is inserted, the piston block 72 is driven to cooperate with the limiting tube 71 to generate airflow, the airflow enters the inside of the long tube 74, the piston rod 77 slides in the inside of the long tube 74, the piston rod 77 is clamped on the outside of the clasp ring 76, and finally the assembly of the device is completed.

[0045] Before use, the fan 42 is subjected to high temperature test: the fan 42 is placed in a 90℃ environment for 4 hours, and then placed at room temperature for 1 hour, to ensure that the fan is not deformed, the dynamic unbalance is ≤0.3g, the two side end face runouts are ≤0.3mm, and the upper disc runout is ≤0.3mm, and then low temperature test is carried out: the fan 42 is placed in a-20℃ environment for 4 hours, and then placed at room temperature for 1 hour, to ensure that the fan 42 is not deformed, the dynamic unbalance is ≤0.3g, the two side end face runouts are ≤0.3mm, and the upper disc runout is ≤0.3mm, and finally cold and hot impact test is carried out: the fan 42 is placed at-15℃ for 30min, and then at 75℃ for 30min, and the cycle is 4h, the high and low temperature conversion time is not more than 20min, to ensure that the dynamic unbalance is ≤0.15g, the two side end face runouts are ≤0.3mm, and the upper disc runout is ≤0.3mm after test, the flame retardant grade of the fan 42 is UL94-V0, and it meets the requirements of RoHS and REACH instructions.

[0046] The third volute 4 and the stator assembly 5 are externally arranged, which not only greatly reduces the volume of the connection part with the centrifugal impeller in the traditional motor, but also makes the overall structure of the centrifugal fan more compact, facilitates flexible installation and layout in narrow or complex space, and effectively improves the motor driving efficiency. The structure characteristics of the third volute 4 and the stator assembly 5 enable them to be more closely combined with the fan 42, reducing the loss in the energy transmission process, thereby enhancing the overall performance of the centrifugal fan. The third volute 4 and the stator assembly 5 are carefully designed with the first volute 1 and the second volute 3, ensuring the close fit of the device, effectively preventing noise and wear caused by looseness or vibration. Moreover, by optimizing material selection and structure design, the strength and durability of the connection part are enhanced.

[0047] Through the added assembly mechanism 6, when assembling the side plate 2 with the first volute 1 and the second volute 3, the position of the side plate 2 is quickly fixed through the cooperation of the long connecting arm 61 and the spherical bearing 62, without the need for traditional bolt connection, thereby greatly improving the assembly speed of the device. Through the added limiting mechanism 7, when the assembly mechanism 6 completes the fixation of the side plate 2, the limiting mechanism 7 is automatically driven to move and cooperate, quickly connecting the first volute 1 and the second volute 3, thereby greatly improving the overall assembly speed of the device, facilitating the disassembly and maintenance of the device by the staff, and thereby improving the overall use effect of the device.

[0048] It should be noted that in this text, relational terms such as first and second are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment.

[0049] Although embodiments of the present application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made thereto 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 motor mounting structure for use in a centrifugal fan, comprising a first volute (1), a side plate (2), a second volute (3), a stator assembly (5), and a third volute (4), wherein the first volute (1) and the side plate (2) are connected, and the third volute (4) is mounted on the outside of the second volute (3), and the stator assembly (5) is mounted on the inside of the third volute (4), characterized in that: The top of the inner cavity of the third volute (4) is fitted with a fan (42), and the stator assembly (5) is fitted inside the fan (42). The stator assembly (5) is connected to a limiting groove (52) on the outside. A bracket (51) is fitted inside the limiting groove (52). The outer shell of the stator assembly (5) is machined with an annular limiting groove. The bracket is embedded in the annular limiting groove. The top of the bracket is fixed to the inner wall of the third volute (4) by screws. The bottom of the bracket is connected to the iron core in the stator assembly by toothed meshing. The fan (42) has a centrifugal blade structure. The fan (42) is connected to the second volute (3) through a motor shaft and bearing seat. The stator assembly (5) is located on the axial inner side of the fan (42).

2. The motor mounting structure applied in a centrifugal fan according to claim 1, characterized in that: The side plate (2) is connected to an assembly mechanism (6) on both sides. The assembly mechanism (6) includes a long arm (61). A spherical bearing (62) is sleeved on the outside of the long arm (61). A connecting rod (65) is connected to the outside of the spherical bearing (62) via a hinge. The other end of the connecting rod (65) is connected to a limit block (66) via a hinge. A cross arm (64) is inserted into the outside of the long arm (61). The second volute (3) is internally equipped with a limiting mechanism (7), which includes a limiting tube (71). A piston block (72) is slidably connected inside the limiting tube (71). A second spring (73) is connected between the piston block (72) and the limiting tube (71). Long tubes (74) are connected to both sides of the limiting tube (71). A piston rod (77) is slidably connected inside the long tube (74). A clip is sleeved on the outside of the long tube (74). The ring (76), the long arm (61) is inserted outside the side plate (2), the limiting block (66) is slidably connected to the side plate (2), the side plate (2) has a slot adapted to the long arm (61) on its outside, the limiting tube (71) is connected to the second volute (3), the long tube (74) has a curved groove (75) inside, the curved groove (75) is slidably connected to the piston rod (77), and the retaining ring (76) is connected to the inner cavity of the first volute (1).

3. The motor mounting structure applied in a centrifugal fan according to claim 1, characterized in that: The back of the first volute (1) and the second volute (3) are connected to a C-shaped tube (12). The two ends of the C-shaped tube (12) on the outside of the first volute (1) are equipped with a first buckle (13). The two ends of the C-shaped tube (12) on the outside of the second volute (3) are equipped with a second buckle (31). The outside of the first volute (1) and the second volute (3) are provided with an assembly groove (11). The inner cavity of the assembly groove (11) is fitted with a rubber sleeve. The inside of the two assembly grooves (11) is adapted to the outside of the side plate (2).

4. The motor mounting structure applied in a centrifugal fan according to claim 1, characterized in that: The inner cavity of the second volute (3) is equipped with a heat sink (32), and the heat sink (32) is evenly provided with holes on the outside, and a wire mesh cover is embedded in the holes.

5. The motor mounting structure applied in a centrifugal fan according to claim 1, characterized in that: The second volute (3) and the first volute (1) are both provided with slide rail grooves (33) on their exteriors, and the inner cavity of the slide rail grooves (33) is provided with anti-slip pads.

6. The motor mounting structure applied in a centrifugal fan according to claim 1, characterized in that: The upper end of the third volute (4) is provided with a heat dissipation mesh filter plate (41), which is located directly above the stator assembly (5), and a ventilation mesh cover is embedded on the outside of the heat dissipation mesh filter plate (41).

7. The motor mounting structure applied in a centrifugal fan according to claim 1, characterized in that: The first volute (1) and the second volute (3) are provided with slots that are adapted to the limiting block (66) on their exteriors, and the limiting block (66) is connected to the outside of the guide block (67). The second volute (3) is provided with a track groove that is adapted to the guide block (67) in its inner cavity, and the track groove is slidably connected to the guide block (67).

8. The motor mounting structure applied in a centrifugal fan according to claim 2, characterized in that: The spherical bearing (62) is uniformly provided with guide arms (63) on its outer side. The guide arms (63) are inserted into the outer side of the side plate (2). The long arm (61) is uniformly provided with first springs (68) on its outer side. The side plate (2) is uniformly provided with grooves that are adapted to the first springs (68). The grooves are connected to the first springs (68).

9. A motor mounting method for use in a centrifugal fan, employing a motor mounting structure for use in a centrifugal fan as described in any one of claims 1-8, characterized in that: include: S1: Component Inspection First, the first volute (1), side plate (2), second volute (3) and third volute (4) are inspected to avoid defects such as burrs, obvious shrinkage marks and missing materials on the outside of the device. At the same time, the stator assembly (5) is inspected to ensure that there are no air holes or sand holes on the surface. S2: Base Installation First, the first volute (1) is fixed by a clamp, then the second volute (3) is placed on the upper end of the first volute (1), and the position is corrected. Then, the second volute (3) and the first volute (1) are fixed by the cooperation of the second buckle (31) and the first buckle (13). The long tube (74) inside the first volute (1) and the second volute (3) is inserted into the inside of the retaining ring (76). S3: Stator Assembly The third volute (4) is fixed and the stator assembly (5) is assembled inside the third volute (4). The PCB circuit board assembly and the zinc alloy frame are riveted into place. Anaerobic adhesive is applied to the joint surface between the winding stator inside the stator assembly (5) and the zinc alloy. The stator assembly (5) is tested for poor soldering, missing soldering and conductivity. S4: Assembly complete Assemble the third volute (4) and the second volute (3) and fix them with bolts. Insert the side plate (2) into the assembly slot (11), pull the long arm (61) to move and rotate it ninety degrees so that the horizontal arm (64) is locked outside the side plate (2). At the same time, the long arm (61) pulls the connecting rod (65) through the ball bearing (62) to drive the limiting block (66) to insert into the slot and the limiting tube (71). At the same time, the limiting tube (71) is inserted and the piston block (72) is driven to cooperate with the limiting tube (71) to generate airflow. The airflow enters the interior of the long tube (74) and pushes the piston rod (77) to move, so that the long tube (74) is locked outside the retaining ring (76). Finally, the overall assembly and fixation of the device are completed.

10. A motor installation method applied in a centrifugal fan according to claim 9, characterized in that: Before use, the fan (42) is subjected to a high temperature test: the fan (42) is placed in a 90℃ environment for 4 hours, and then placed at room temperature for 1 hour to ensure that the fan (42) is not deformed, and that the dynamic imbalance is ≤0.3g, the runout of the two end faces is ≤0.3mm and the runout of the upper plate is ≤0.3mm. After the high temperature test, a low temperature test was conducted: the fan (42) was placed in a -20℃ environment for 4 hours, and then placed at room temperature for 1 hour to ensure that the fan (42) had no external deformation, dynamic imbalance ≤0.3g, runout of both end faces ≤0.3mm and runout of the upper plate ≤0.3mm; Finally, a thermal shock test was conducted: the fan (42) was placed at -15℃ for 30 minutes, then at 75℃ for 30 minutes, and the cycle was repeated for 4 hours. The high and low temperature transition time was 20 minutes. This ensured that the dynamic imbalance after the test was ≤0.15g, the runout of both end faces was ≤0.3mm, and the runout of the upper plate of the impeller was ≤0.3mm. The fan (42) has a flame retardant rating of UL94-V0 and meets the requirements of RoHS and REACH directives.

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