A fan

Abstract

The present invention discloses a fan, comprising a support frame, a volute, a connecting shaft, an impeller assembly and a transmission member; the volute is connected to the support frame, is hollow inside and has an air inlet and an air outlet; the connecting shaft is connected to the support frame and at least partially extends into the volute; the impeller assembly is used to drive the air in the volute to be sent out from the air outlet when rotating, and includes an impeller seat and blades connected to the outer periphery of the impeller seat, and the impeller seat is rotatably sleeved on the portion of the connecting shaft extending into the volute; the transmission member is used to connect to a driving mechanism to obtain rotational power and is connected to the impeller seat to transmit torque. The impeller assembly of the present invention makes it unnecessary for the driving mechanism connected to the transmission member to bear the gravity load of the impeller assembly, thereby increasing the service life of the driving mechanism, improving the stability of the fan, and reducing rotational shaking caused by deformation.

Description

Technical Field

[0001] The present invention relates to the field of fans, and in particular to a fan. Background Art

[0002] Fans are widely used in ventilation, dust removal and cooling of factories, mines, tunnels, cooling towers, vehicles, ships and buildings; ventilation and air induction of boilers and industrial furnaces; cooling and ventilation in air conditioning equipment and household appliances; drying and conveying grains; wind tunnel air sources and inflation and propulsion of hovercraft, etc.

[0003] Usually, the output shaft of the fan's driving mechanism (motor) drives the fan's impeller group to rotate, but the weight of the impeller group is usually transferred to the output shaft of the driving mechanism (motor), resulting in the output shaft of the driving mechanism (motor) not only needing to output torque but also bearing radial load. Long-term use will cause radial deformation of the output shaft, resulting in rotational deflection and shaking, which seriously affects the life of the motor. Summary of the Invention

[0004] The present invention aims to solve the above technical problems at least to a certain extent. To this end, the present invention provides a fan that prevents the load of the impeller assembly from being transferred to the drive mechanism.

[0005] The technical solution adopted by the present invention to solve its technical problems is: a fan, including a support frame, a volute, a connecting shaft, an impeller group and a transmission member; the volute is connected to the support frame, is hollow inside and has an air inlet and an air outlet; the connecting shaft is connected to the support frame and at least partially extends into the volute; the impeller group is used to drive the air in the volute to be sent out from the air outlet when rotating, and includes an impeller seat and blades connected to the outer periphery of the impeller seat, and the impeller seat is rotatably sleeved on the part of the connecting shaft extending into the volute; the transmission member is used to connect with the driving mechanism to obtain rotational power, and is connected with the impeller seat to transmit torque.

[0006] A fan according to an embodiment of the present invention has at least the following technical effects: the volute transfers its own weight to the support frame by being connected to the support frame, thereby avoiding affecting the transmission member and the drive mechanism; the impeller group is rotatably sleeved on the connecting shaft, transferring its own weight to the connecting shaft, and the connecting shaft transfers its weight to the support frame by being connected to the support frame, and the transmission member is connected to the impeller seat only needs to transmit torque to drive the impeller group to rotate, and does not have to bear the weight of the impeller group, so that the drive mechanism connected to the transmission member (the output shaft of the drive mechanism) does not need to bear the gravity load of the impeller group, thereby improving the service life of the drive mechanism, improving the stability of the fan, and reducing the rotational shaking caused by deformation.

[0007] According to some embodiments of the present invention, a bearing is provided between the connecting shaft and the impeller seat.

[0008] In a fan according to an embodiment of the present invention, the connecting shaft is a stepped shaft, one side of the bearing abuts against the shaft shoulder, and the other side is limited by a limiting member installed on the connecting shaft.

[0009] In a fan according to an embodiment of the present invention, the transmission member is provided with a transmission shaft extending out of the volute, and the transmission shaft is used to be connected to a driving mechanism outside the volute.

[0010] In a fan according to an embodiment of the present invention, the transmission shaft passes through the connecting shaft and the support frame in sequence to extend out of the volute.

[0011] According to a fan of an embodiment of the present invention, the air inlet is connected to an air inlet chamber, and the air inlet chamber has an air inlet opening.

[0012] According to a fan of an embodiment of the present invention, a connecting flange for connecting to an external structure is installed at the air inlet opening, and the connecting flange is sealed to the peripheral wall of the air inlet opening.

[0013] According to a fan of an embodiment of the present invention, the connecting flange is sleeved on the peripheral wall of the air inlet opening and can slide along the peripheral wall of the air inlet opening to adjust its position.

[0014] According to a fan of an embodiment of the present invention, a plurality of guide seats are provided on the peripheral wall of the air inlet chamber. The guide seats have guide holes extending along the sliding direction of the connecting flange. The connecting flange has guide columns extending toward and penetrating the guide holes.

[0015] According to a fan of an embodiment of the present invention, a sealing strip is embedded between the connecting flange and the peripheral wall of the air inlet opening.

[0016] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described below with reference to the accompanying drawings and examples.

[0018] Figure 1 1 is a schematic diagram of the installation structure of an embodiment of the present invention;

[0019] Figure 2 This is an exploded schematic diagram of the installation state of an embodiment of the present invention;

[0020] Figure 3 is an exploded schematic diagram of the installation state from another angle of the embodiment of the present invention;

[0021] Figure 4 is an internal cross-sectional view of an embodiment of the present invention;

[0022] Figure 5 yes Figure 4A magnified view of point A;

[0023] Figure 6 yes Figure 4 Magnified view of point B. DETAILED DESCRIPTION

[0024] The present invention is described in detail below with reference to the accompanying drawings and embodiments.

[0025] Reference Figures 1 to 6 A fan embodiment of the present invention includes a support frame 100, a volute 200, a connecting shaft 300, an impeller assembly and a transmission member 500.

[0026] The present invention can be applied to a variety of fans. The structure of the present invention is described in detail below using a centrifugal fan as an example. The support frame 100 is used to mount fixed components and directly or indirectly contact the ground to transfer the gravity load it bears to the ground. The support frame 100 typically contacts the ground through a base (not shown).

[0027] The volute 200 is generally flat and cylindrical, and a wear-resistant coating can be applied to the surface to improve the wear resistance. The volute 200 is hollow inside and has an air inlet and an air outlet 211. The air inlet is located on one side (right side) of the volute 200, and the air outlet 211 is located on the bottom of the circumferential wall of the volute 200 and extends outward along the tangential direction of the volute 200 to correspond to the tangential direction of the rotation of the impeller group, so that the air flow is smoother. In some embodiments, the volute 200 can be composed of multiple parts connected, such as Figure 2 and Figure 3 As shown, the volute 200 includes a volute body 210 and a volute cover 220. The volute body 210 is in the shape of a flat cylinder, and has a circular opening corresponding to the volute cover 220 on one side (the right side). The volute cover 220 is in the shape of a circular plate and covers the circular opening. The volute cover 220 is connected to the volute body 210 by fasteners (such as screws), and the connection is tightly fitted or embedded with a sealing ring to improve the sealing. The center of the volute cover 220 has a center hole 221, which serves as the air inlet of the volute 200. The volute 200 is connected to the support frame 100. Specifically, as shown in FIG. Figure 5 As shown, the side (left side) of the volute body 210 facing away from the air inlet is connected to the support frame 100, and a plurality of first mounting holes 213 are provided at the position where the volute body 210 and the support frame 100 are in contact, and the support frame 100 is provided with corresponding second mounting holes 110. The first mounting holes 213 and the second mounting holes 110 are aligned and fasteners (such as bolts) are installed to achieve connection and fixation. The volute 200 transfers its own weight to the support frame 100 by being connected to the support frame 100.

[0028] One end (left end) of the connecting shaft 300 is fixedly connected to the support frame 100, and the other end (right end) extends through the volute 200 and into the volute 200. The volute 200 (volute body 210) is provided with a clearance hole 212 at the position corresponding to the connecting shaft 300 to avoid interference. Specifically, the clearance hole 212 is provided on the side of the volute body 210 facing away from the air inlet (left side). It will be understood that for structural optimization, the connecting shaft 300 is located on the central axis of the volute 200. The connection between the connecting shaft 300 and the support frame 100 can be integrally formed or connected by welding, fasteners, etc.

[0029] The impeller assembly is used to drive the air in the volute 200 out of the air outlet 211 when rotating. The impeller assembly includes an impeller seat 400 and blades (not shown) connected to the outer periphery of the impeller seat 400. The impeller seat 400 is mounted on the connecting shaft 300 and can rotate along the axis of the connecting shaft 300. The transmission member 500 is used to connect with the drive mechanism to obtain rotational power and connect with the impeller seat 400 to transmit torque. Specifically, the transmission member 500 is placed in the volute 200 and is located on the right side of the impeller seat 400. The transmission member 500 is arranged in a rotational arrangement along the rotation axis of the impeller seat 400 to form a plurality of third mounting holes 520. The impeller seat 400 is correspondingly provided with a fourth mounting hole 420. The third mounting hole 520 and the fourth mounting hole 420 are aligned and screws are installed to achieve connection. The driving mechanism is typically a rotary motor. The output shaft of the rotary motor is connected to the transmission member 500 to drive it to rotate and ultimately drive the impeller assembly to rotate.

[0030] The fan provided by the present invention is rotatably mounted on the connecting shaft 300 through the impeller group, and the weight of the impeller group itself is transferred to the connecting shaft 300. The connecting shaft 300 transfers the weight to the support frame 100 by being connected to the support frame 100, thereby realizing the transfer of load. The transmission member 500 is connected to the impeller seat 400 and only needs to transmit torque to drive the impeller group to rotate, and does not have to bear the weight of the impeller group. Therefore, the driving mechanism (output shaft of the driving mechanism) connected to the transmission member 500 does not need to bear the gravity load of the impeller group, avoiding deformation of the output shaft due to bearing the radial gravity load, resulting in damage to the motor and the fan. The fan provided by the present invention increases the life of the driving mechanism, and also improves the stability of the fan itself, reducing the rotational shaking caused by deformation.

[0031] Reference Figure 5 In some embodiments of the present invention, a bearing 600 is provided between the connecting shaft 300 and the impeller seat 400. The inner ring of the bearing 600 is mounted on the connecting shaft 300, and the outer ring is nested in the center of the impeller seat 400. While only one bearing is shown in the figure, in other embodiments of the present invention, multiple bearings 600 may be provided, and a variety of bearing types may be selected based on requirements. The bearing 600 reduces rotational friction between the impeller seat 400 and the connecting shaft 300, thereby reducing heat generation and power consumption.

[0032] It is conceivable that in some embodiments, in order to limit the bearing 600, the connecting shaft 300 is a stepped shaft, one side (left side) of the bearing 600 is against the shaft shoulder, and the other side (right side) is limited by a limiting member 610 installed on the connecting shaft 300. Specifically, the limiting member 610 is a limiting nut, which is threadedly connected to the connecting shaft 300 to limit the other side (right side) of the bearing. In addition, a limiting protrusion 410 protruding inward is provided in the center of the impeller seat 400 on the side (left side) of the bearing 600 away from the transmission member 500. The limiting protrusion 410 contacts the side (left side) of the outer ring of the bearing 600 to limit the impeller seat 400 and prevent it from falling off. In addition, the transmission member 500 is provided with a limiting structure 530 extending toward the outer ring of the bearing at the position corresponding to the outer ring of the bearing 600. The limiting structure 530 contacts the right side of the outer ring of the bearing 600 to limit it. The impeller seat 400 and the transmission member 500 are axially fixed on the connecting shaft 300 through the limiting protrusion 410 and the limiting structure 530.

[0033] It can be understood that in some embodiments of the present invention, in order to facilitate the connection between the transmission member 500 and the motor, the transmission member 500 is provided with a transmission shaft 510 extending out of the volute 200, and the transmission shaft 510 is used to be connected to the driving mechanism (motor) outside the volute 200. The transmission shaft 510 extends out of the volute 200 and is connected to the output shaft of the motor through a coupling to transmit torque, which can provide sufficient installation space for the motor and facilitate the installation and layout of the equipment.

[0034] Reference Figure 5 The transmission shaft 510 passes through the connecting shaft 300 and the support frame 100 in sequence to extend out of the volute 200. The connecting shaft 300 and the transmission shaft 510 are coaxially arranged. The connecting shaft 300 and the support frame 100 are provided with a hole for the transmission shaft 510 to pass through, and the hole size is larger than the transmission shaft 510 to reduce unnecessary friction, and the transmission shaft extends back to the air inlet, which can prevent the transmission shaft from affecting the air intake efficiency of the air inlet, and by extending through the connecting shaft 300 and the support frame 100, it can maximize the use of space and facilitate the connection of the air inlet with other air intake structures.

[0035] Reference Figures 1 to 4 In some embodiments of the present invention, the air inlet is connected to an air inlet chamber 700. The air inlet chamber 700 is hollow and has corresponding ventilation holes 740 at the connection position with the air inlet. The upper end of the air inlet chamber 700 also has an air inlet opening 730 for air intake, which facilitates communication with the external air inlet pipeline through the air inlet chamber 700. The volute body, air inlet chamber, and volute cover can all be formed in one step using a rotational molding process. The three adopt an assembled structure and are connected by fasteners (screws and bolts), which can reduce the overall weight and improve production efficiency.

[0036] It is conceivable that in some embodiments of the present invention, a connecting flange 710 for connecting to an external structure is installed at the air inlet opening 730. The connecting flange 710 is sealed to the peripheral wall of the air inlet opening 730. The connecting flange 710 is convenient for docking with the external structure and avoids air leakage and pressure relief through the sealed connection.

[0037] In a further embodiment of the present invention, a connecting flange 710 is sleeved around the peripheral wall of the air inlet opening 730 and can slide along the peripheral wall of the air inlet opening 730 to adjust its position. The inner ring of the connecting flange 710 corresponds to the peripheral wall of the air inlet opening 730 and can slide and rise and fall. Typically, when a fan is in operation, it needs to be docked with other structures. However, during assembly, due to errors, the connecting flange 710 cannot be accurately aligned when docked, causing installation difficulties. However, by adjusting the position of the connecting flange 710, assembly errors can be well accommodated, simplifying installation.

[0038] Reference Figure 2 、 Figure 3 and Figure 6 A number of guide seats 720 are provided on the peripheral wall of the air inlet chamber 700. The guide seats 720 have guide holes 721 extending along the sliding direction of the connecting flange 710. The connecting flange 710 has guide columns 711 extending toward the guide holes 721 and penetrating into the guide holes 721. The guide holes 721 and the guide columns 711 cooperate to achieve adjustment guidance and improve the accuracy of adjustment.

[0039] Reference Figure 6 In some embodiments of the present invention, a sealing strip 800 is embedded between the connecting flange 710 and the peripheral wall of the air inlet opening 730. The connecting flange 710 can be adjusted along the peripheral position of the sealing strip 800, but it is always in contact with the peripheral wall of the sealing strip 800 to achieve a sealed connection with the peripheral wall of the air inlet opening 730. The sealing strip 800 is specifically attached to the peripheral wall of the air inlet opening 730. In order to improve the connection strength of the sealing strip 800 and prevent it from falling off, a groove is provided on the peripheral wall of the air inlet opening 730, and the sealing strip 800 is provided with a protrusion that adapts to the groove. The cooperation of the groove and the protrusion achieves good limiting fixation.

[0040] Throughout this specification, references to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" indicate that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, illustrative uses of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0041] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the claims and their equivalents.

Claims

1. A fan, characterized in that include: Support frame (100); The volute (200) is connected to the support frame (100), is hollow inside and has an air inlet and an air outlet (211); A connecting shaft (300) connected to the support frame (100) and at least partially extending into the volute (200); An impeller assembly, used for driving the air in the volute (200) to be delivered from the air outlet (211) when rotating, comprising an impeller seat (400) and blades connected to the outer periphery of the impeller seat (400), wherein the impeller seat (400) is rotatably sleeved on the portion of the connecting shaft (300) extending into the volute (200), and a bearing (600) is provided between the connecting shaft (300) and the impeller seat (400); A transmission member (500) is used to connect with a driving mechanism to obtain rotational power and to connect with an impeller seat (400) to transmit torque. The transmission member (500) is provided with a transmission shaft (510) extending outside the volute (200). The transmission shaft (510) is used to connect with the driving mechanism outside the volute (200). The transmission shaft (510) sequentially passes through a connecting shaft (300) and a support frame (100) to extend outside the volute (200). The transmission member (500) is placed in the volute (200) and is located on the right side of the impeller seat (400). The transmission member (500) is arranged along the rotation axis of the impeller seat (400) to provide a plurality of third mounting holes (520). The impeller seat (400) is correspondingly provided with a fourth mounting hole (420). The third mounting hole (520) and the fourth mounting hole (420) are aligned and screws are installed to achieve connection.

2. The fan according to claim 1, characterized in that: The connecting shaft (300) is a stepped shaft, one side of the bearing (600) abuts against a shaft shoulder, and the other side is limited by a limiting member (610) installed on the connecting shaft (300).

3. The fan according to claim 1, characterized in that: The air inlet is connected to an air inlet chamber (700), and the air inlet chamber (700) has an air inlet opening (730).

4. The fan according to claim 3, characterized in that: A connecting flange (710) for connecting to an external structure is installed at the air inlet opening (730), and the connecting flange (710) is sealedly connected to the peripheral wall of the air inlet opening (730).

5. The fan according to claim 4, characterized in that: The connecting flange (710) is sleeved on the peripheral wall of the air inlet opening (730) and can slide along the peripheral wall of the air inlet opening (730) to adjust its position.

6. The fan according to claim 5, characterized in that: The peripheral wall of the air inlet chamber (700) is provided with a plurality of guide seats (720), each of which has a guide hole (721) extending along the sliding direction of the connecting flange (710), and the connecting flange (710) has a guide column (711) extending toward the guide hole (721) and penetrating the guide hole (721).

7. The fan according to claim 4, characterized in that: A sealing strip (800) is embedded between the connecting flange (710) and the peripheral wall of the air inlet opening (730).

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