An oxygenator

Abstract

The present application relates to an aerator, comprising a housing, a reduction gear disposed within the housing, a drive motor disposed outside the housing for driving the reduction gear, an output shaft of the drive motor extending through the housing on a side facing away from the drive motor, and coaxially secured with a connection plate for connecting to an impeller, and a plurality of connection blocks for connecting to a float disposed circumferentially on an outer sidewall of the housing. The present application has the effect of increasing the service life of the aerator.

Description

Technical Field

[0001] The present application relates to the field of water oxygenation equipment, and in particular to an aerator. Background Art

[0002] A submersible impeller aerator disclosed in application publication number CN102442729A in the related art includes a submersible motor installed in water with an impeller mounted thereon, and a weighing rod and a float are used to float the impeller on the water surface for aeration and oxygenation.

[0003] During use, the above-mentioned aerator is driven directly by a submersible motor to rotate the impeller. In the process of directly driving the impeller to rotate, the submersible motor is in a high-speed rotation state for a long time, so the motor speed cannot be effectively controlled, which can easily cause greater internal wear of the motor and damage to the motor, thereby rendering the aerator unusable. This needs to be improved. Summary of the Invention

[0004] In order to increase the service life of an aerator, the present application provides an aerator.

[0005] The present application provides an aerator that adopts the following technical solution:

[0006] An aerator comprises a shell, a reduction device is arranged inside the shell, a drive motor is arranged outside the shell to drive the reduction device to move, the output shaft of the drive motor passes through the side of the shell opposite to the drive motor and is coaxially fixed with a connecting disk for connecting to an impeller, and a plurality of connecting blocks for connecting to a float are circumferentially arranged on the outer side wall of the shell.

[0007] By adopting the above technical solution, when the aerator is working, the motor starts and drives the impeller on the connecting disk to rotate. During the rotation of the impeller, due to the setting of the reduction device, the rotation speed of the motor output shaft can be effectively controlled to reduce the wear of the motor when it is in a high speed state for a long time, thereby reducing the damage to the motor and helping to increase the service life of the aerator.

[0008] Optionally, the reduction device includes an internal gear and an outer gear ring arranged outside the internal gear, the output shaft of the drive motor is connected to the eccentric position of the internal gear, the outer gear ring is coaxially arranged with the output shaft of the drive motor, and a plurality of meshing teeth are circumferentially arranged on the outer wall of the internal gear, and a plurality of tooth grooves meshing with the meshing teeth are provided on the inner wall of the outer gear ring, and the number of the tooth grooves is one more than the number of meshing teeth.

[0009] By adopting the above technical solution, the motor starts and drives the inner gear to rotate eccentrically in the outer gear ring. During the rotation of the inner gear, since the number of tooth grooves is one more than the number of meshing teeth, the meshing teeth are intermittently meshed with the tooth grooves, so as to increase the torque and reduction ratio of the motor rotation, thereby reducing the speed of the motor and realizing the control of the speed of the aerator. In addition, the intermittent meshing of the meshing teeth and the tooth grooves can avoid the meshing teeth and the tooth grooves being in a meshing state at all times when the reducer is working, so as to reduce the wear of the meshing teeth and the tooth grooves, which is beneficial to improving the service life of the reducer.

[0010] Optionally, the reduction device also includes an inner connecting transmission plate coaxially connected to the internal gear, and an outer connecting transmission plate arranged on the side of the inner connecting transmission plate facing away from the internal gear, the outer connecting transmission plate is coaxially connected to the output shaft of the drive motor, a plurality of first bearings are arranged on the inner connecting transmission plate for circumferential rotation, a plurality of buffer holes corresponding to the first bearings are opened on the outer connecting transmission plate, the aperture of the buffer hole is larger than the diameter of the first bearing, and the outer ring of the first bearing is fitted to the hole wall of the buffer hole.

[0011] By adopting the above technical solution, when the internal gear rotates, it drives the internal connecting transmission plate to rotate, so that several first bearings rotate in the buffer hole in contact with the hole wall of the buffer hole, thereby increasing the buffering force during the rotation of the internal gear, thereby further enhancing the deceleration effect of the reducer.

[0012] Optionally, the inner connecting transmission plate is provided with a plurality of connecting shafts corresponding one-to-one to the first bearings, the first bearings are rotatably connected to the connecting shafts, an annular step is provided on the side wall of the connecting shaft, and the end face of the first bearing is against the annular step.

[0013] By adopting the above technical solution and providing an annular step, the end face of the first bearing can be prevented from contacting the inner connecting transmission plate during the rotation of the first bearing, thereby reducing the wear of the first bearing and the inner connecting transmission plate.

[0014] Optionally, a crankshaft balancing block is also provided on the output shaft of the drive motor, and the crankshaft balancing block includes a balancing shaft coaxially arranged on the inner side wall of the internal gear, an eccentric block coaxially eccentrically arranged on the end face of the balancing shaft, and an abutment block fixedly connected to the side wall of the eccentric block, and the abutment block abuts against the end face of the internal gear.

[0015] By adopting the above technical solution and setting a crankshaft balancing block, the eccentric force during the rotation of the internal gear can be adjusted, thereby ensuring the balance of the internal gear during the rotation.

[0016] Optionally, a second bearing is coaxially connected to the balancing shaft, and the inner side wall of the internal gear is fixed to the outer ring of the second bearing.

[0017] By adopting the above technical solution and providing a second bearing, the friction between the balance shaft and the internal gear can be reduced.

[0018] Optionally, a third bearing is coaxially connected to the balance shaft on a side of the second bearing facing away from the drive motor, and the inner side wall of the inner connecting transmission plate is fixed to the outer ring of the third bearing.

[0019] By adopting the above technical solution and providing a third bearing, the friction between the balance shaft and the inner connecting transmission plate can be reduced.

[0020] Optionally, the drive motor includes a casing, a rotor arranged in the casing, and a front cover and a rear cover arranged at both ends of the casing. The outer gear ring is fixedly connected to the end face of the front cover facing away from the casing. A number of conductive rods are passed through the rotor in the circumferential direction, and both ends of the conductive rods protrude from the end face of the rotor in the axial direction.

[0021] By adopting the above technical solution and setting up a number of conductive rods, when starting the motor, the motor can be directly energized, so that after alternating current is applied inside the motor to form a rotating magnetic field, the several conductive rods cut the magnetic flux lines of the magnetic field to drive the rotor to rotate, so that the motor can work.

[0022] In summary, this application includes at least one of the following beneficial technical effects:

[0023] 1. By setting up a deceleration device, when the motor starts and drives the impeller on the connecting disk to rotate, the rotation speed of the motor output shaft can be effectively controlled to reduce the wear of the motor when it is in a high speed state for a long time, thereby reducing the damage to the motor and helping to increase the service life of the aerator;

[0024] 2. By setting up an internal gear and an external gear ring, and setting the number of tooth grooves on the external gear ring to be one more than the number of meshing teeth on the internal gear, when the reducer is working, the meshing teeth are intermittently meshed with the tooth grooves instead of being in a meshing state all the time, which is beneficial to reduce the wear of the meshing teeth and tooth grooves and increase the service life of the reducer;

[0025] 3. By setting an inner connecting transmission plate and an outer connecting transmission plate, and setting a plurality of first bearings on the inner connecting transmission plate, and setting buffer holes for accommodating the first bearings on the outer connecting plate, the buffer force during the rotation of the internal gear is increased, so as to further enhance the deceleration effect of the reducer. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is an overall structural diagram of the aerator of Example 1 of the present application.

[0027] Figure 2This is an exploded structural diagram of the aerator of Example 1 of the present application.

[0028] Figure 3 It is a cross-sectional structural diagram of the deceleration device of Example 1 of the present application.

[0029] Figure 4 This is an exploded structural diagram of the drive motor of Example 1 of the present application

[0030] Figure 5 This is a structural diagram of the drive motor of Example 2 of the present application.

[0031] Explanation of the accompanying drawings: 1. Shell; 11. Connecting block; 12. Connecting plate; 2. Speed ​​reduction device; 21. Internal gear; 211. Meshing teeth; 212. First annular groove; 22. External gear ring; 221. Tooth groove; 23. External connecting transmission plate; 231. Buffer hole; 24. Internal connecting transmission plate; 3. Driving motor; 31. Casing; 32. Front end cover; 321. Accommodating groove; 33. Rear end cover; 34. Rotor; 341. Conductive rod; 4. First bearing; 5. Connecting shaft; 51. Annular step; 6. Crankshaft balancing block; 61. Balancing shaft; 611. Second annular groove; 62. Eccentric block; 63. Abutment block; 7. Second bearing; 8. Third bearing; 9. First retaining spring; 10. Second retaining spring. DETAILED DESCRIPTION

[0032] The following is combined with Figure 1-5 This application is described in further detail.

[0033] The embodiment of the present application discloses an oxygenator.

[0034] Example 1

[0035] Reference Figure 1 、 Figure 2 The aerator includes a shell 1, a reduction gear 2 arranged in the shell 1, and a driving motor 3 for driving the reduction gear 2 to move.

[0036] Reference Figure 2 、 Figure 3The drive motor 3 includes a casing 31, a rotor 34 rotatably connected to the casing 31, and a front end cover 32 and a rear end cover 33 fixedly connected to both ends of the casing 31. The front end cover 32 is fixedly connected to the shell 1 with its side wall facing away from the casing 31. A plurality of conductive rods 341 are penetrated on the end surface of the rotor 34 facing the front end cover 32 and close to the inner side wall of the casing 31 along the axial direction of the rotor 34. A plurality of guide rods are evenly arranged along the circumferential direction of the rotor 34. One end of each conductive rod 341 protrudes from the end surface of the rotor 34 facing the front end cover 32, and the other end protrudes from the end surface of the rotor 34 facing the rear end cover 33. When the drive motor 3 is energized, alternating current is applied to the inside of the drive motor 3 to form a rotating magnetic field, so that the plurality of conductive rods 341 can directly cut the magnetic flux lines of the magnetic field, thereby driving the rotor 34 to rotate, so that the drive motor 3 works.

[0037] Reference Figure 2 、 Figure 3 Several groups of connecting blocks 11 for connecting the float are evenly fixed along the circumferential direction on the outer wall of the shell 1. The number of connecting blocks 11 in each group is preferably two. A connecting disk 12 for connecting the impeller is provided on the side of the shell 1 facing away from the front cover 32. The output shaft of the drive motor 3 passes through the shell 1 and extends to the side of the shell 1 facing away from the front cover 32, and is coaxially fixedly connected to the connecting disk 12.

[0038] Reference Figure 2 The reduction gear 2 includes an internal gear 21 and an outer gear ring 22 arranged outside the internal gear 21. The output shaft of the drive motor 3 is fixedly connected to the eccentric position of the internal gear 21. The center line of the outer gear ring 22 in the axial direction coincides with the axial center line of the output shaft of the drive motor 3, and the outer gear ring 22 is fixedly connected to the end surface of the front end cover 32 facing away from the housing 31. Specifically, a receiving groove 321 for the outer gear ring 22 to be embedded is provided on the end surface of the front end cover 32. The outer gear ring 22 is fixedly connected to the receiving groove 321 by bolts, and the side of the outer gear ring 22 facing away from the housing 31 protrudes from the notch of the receiving groove 321.

[0039] Reference Figure 2 A plurality of meshing teeth 211 are evenly and fixedly connected to the outer wall of the inner gear 21 along the circumferential direction. The end of the meshing teeth 211 away from the inner gear 21 is arc-shaped. A plurality of tooth grooves 221 meshing with the meshing teeth 211 are evenly opened on the inner wall of the outer gear ring 22 along the circumferential direction. The number of tooth grooves 221 is one more than the number of meshing teeth 211. In this embodiment, the number of tooth grooves 22121 is preferably 11, and the corresponding number of meshing teeth 21111 is 10; when the motor starts to drive the inner gear 21 to rotate, the plurality of meshing teeth 211 intermittently mesh with the tooth grooves 221 one by one, so that the inner gear 21 performs eccentric motion to achieve a deceleration effect.

[0040] Reference Figure 2The reduction gear 2 also includes an external connection transmission plate 23 arranged on the side of the internal gear 21 facing away from the housing 31 and an internal connection transmission plate 24 arranged between the internal gear 21 and the external connection transmission plate 23. The external connection transmission plate 23 is coaxially connected to the output shaft of the drive motor 3, and the internal connection transmission plate 24 is fixed on the internal gear 21 and coaxially connected to the internal gear 21.

[0041] Reference Figure 2 The diameter of the inner connecting transmission plate 24 is larger than the diameter of the inner gear 21 but smaller than the diameter of the outer gear ring 22. The diameter of the outer connecting transmission plate 23 is larger than the diameter of the inner connecting transmission plate 24 but smaller than the diameter of the outer gear ring 22. A plurality of connecting shafts 5 are evenly fixed along the circumferential direction on the end surface of the inner connecting transmission plate 24 facing the outer connecting transmission plate 23. The number of connecting shafts 5 is preferably 2-6, and preferably 4 in this embodiment. Each connecting shaft 5 is coaxially connected to a first bearing 4 for rotation. An annular step 51 protrudes on the side wall of the connecting shaft 5 between the first bearing 4 and the inner connecting transmission plate 24. The end surface of the first bearing 4 facing the inner connecting transmission plate 24 abuts against the annular step 51 to reduce direct contact between the first bearing 4 and the inner connecting transmission plate 24 during rotation, thereby reducing wear between the first bearing 4 and the inner connecting transmission plate 24.

[0042] Reference Figure 2 A number of buffer holes 231 corresponding to the first bearing 4 are evenly opened on the external connection transmission plate 23 along the circumferential direction. The aperture of the buffer hole 231 is larger than the diameter of the first bearing 4. The center line of the first bearing 4 in the axial direction is located at the eccentric position of the buffer hole 231. The first bearing 4 is located in the buffer hole 231 and rotates in the buffer hole 231 in line with the hole wall. When the reducer is in the initial stop state, the side wall of the outer ring of the first bearing 4 is in line with the hole wall of the buffer hole 231; when the drive motor 3 is started to make the reducer work, the internal gear 21 rotates so that the meshing teeth 211 engage with the tooth grooves 221 one by one, and the internal gear 21 drives the internal connection transmission plate 24 to perform eccentric rotation at the same time, so that the first bearing 4 rotates in the buffer hole 231 along the hole wall of the buffer hole 231, so as to reduce the speed of the internal gear 21 under the action of the driving force, thereby achieving the deceleration effect.

[0043] Reference Figure 2 、 Figure 4A crankshaft balancing block 6 is also provided on the output shaft of the drive motor 3. The crankshaft balancing block 6 is located on the inner side wall of the internal gear 21. The crankshaft balancing block 6 includes a balancing shaft 61, an eccentric block 62 and an abutment block 63. The balancing shaft 61 is sleeved and fixed on the output shaft of the drive motor 3, and the balancing shaft 61 is coaxially arranged with the internal gear 21. A second bearing 7 is coaxially fixed on the balancing shaft 61. The inner ring of the second bearing 7 is fixedly connected to the circumferential side wall of the balancing shaft 61, and the outer ring of the second bearing 7 is fixedly connected to the inner side wall of the internal gear 21. The eccentric block 62 is coaxially and eccentrically fixed to the end face of the balancing shaft 61 facing away from the external connection transmission plate 23. The abutment block 63 is fixedly connected to the side wall of the eccentric block 62, and the side wall of the abutment block 63 facing the external connection transmission plate 23 abuts against the end face of the internal gear 21.

[0044] Reference Figure 2 、 Figure 4 A third bearing 8 is coaxially connected to the balance shaft 61 on the side of the second bearing 7 facing the external connection transmission plate 23. The inner ring of the third bearing 8 is fixedly connected to the circumferential side wall of the balance shaft 61, and the outer ring of the third bearing 8 is fixedly connected to the inner side wall of the internal connection transmission plate 24.

[0045] Reference Figure 2 、 Figure 4 A first retaining spring 9 is provided on the outside of the balancing shaft 61 between the second bearing 7 and the third bearing 8, and a first annular groove 212 for the first retaining spring 9 to be embedded is opened on the inner side wall of the rotating internal gear 21. A second annular groove 611 is opened circumferentially on the side wall of the balancing shaft 61 away from the abutment block 63, and a second retaining spring 10 is embedded in the second annular groove 611. The second retaining spring 10 abuts against the end face of the third bearing 8 facing away from the second bearing 7, thereby limiting the axial movement of the second bearing 7 and the third bearing 8 in the process of the internal gear 21 rotating and driving the inner connecting transmission plate 24 to rotate.

[0046] The implementation principle of an oxygenator in the embodiment of the present application is as follows:

[0047] When the aerator is working, the drive motor 3 starts and drives the internal gear 21 to rotate eccentrically in the outer gear ring 22, so that the several meshing teeth 211 are intermittently meshed with the tooth grooves 221 one by one, and the inner connecting transmission plate 24 rotates with the inner gear 21, and the outer connecting transmission plate 23 rotates with the output shaft of the drive motor 3, so that the several first bearings 4 rotate in the buffer hole 231 in contact with the hole wall of the buffer hole 231, thereby realizing the control of the motor speed. At the same time, the impeller on the connecting disk 12 rotates with the output shaft of the drive motor 3 to move the water away from the water surface and contact it with the air, thereby increasing the dissolved oxygen content in the water and completing the work of the aerator.

[0048] Example 2

[0049] Reference Figure 5The difference between this embodiment and embodiment 1 is that the casing 3131 of the driving motor 3 adopts a horizontal casing 31, and one end of the motor output shaft is passed through the outside of the front cover 32, and the other end is passed through the outside of the rear cover 33, so that both ends of the motor output shaft can be connected to the impeller.

[0050] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. An oxygenator, characterized in that: The invention comprises a housing (1), a reduction gear (2) is provided inside the housing (1), a driving motor (3) for driving the reduction gear (2) is provided outside the housing (1), an output shaft of the driving motor (3) passes through the housing (1) on a side facing away from the driving motor (3), and a connecting disc (12) for connecting to an impeller is coaxially fixed thereto, and a plurality of connecting blocks (11) for connecting to a float are circumferentially provided on the outer side wall of the housing (1); The reduction gear (2) comprises an internal gear (21) and an external gear ring (22) arranged outside the internal gear (21); the output shaft of the drive motor (3) is connected to an eccentric position of the internal gear (21); the external gear ring (22) is coaxially arranged with the output shaft of the drive motor (3); a plurality of meshing teeth (211) are circumferentially arranged on the outer side wall of the internal gear (21); a plurality of tooth grooves (221) meshing with the meshing teeth (211) are arranged on the inner side wall of the external gear ring (22); the number of the tooth grooves (221) is one more than the number of the meshing teeth (211); The reduction gear (2) further comprises an inner connecting transmission plate (24) coaxially connected to the inner gear (21), and an outer connecting transmission plate (23) arranged on a side of the inner connecting transmission plate (24) facing away from the inner gear (21), wherein the outer connecting transmission plate (23) is coaxially connected to the output shaft of the drive motor (3), a plurality of first bearings (4) are arranged on the inner connecting transmission plate (24) for circumferential rotation, and a plurality of buffer holes (231) corresponding to the first bearings (4) are opened on the outer connecting transmission plate (23), the aperture of the buffer hole (231) is larger than the diameter of the first bearing (4), and the outer ring of the first bearing (4) is in contact with the hole wall of the buffer hole (231); The inner connecting transmission plate (24) is provided with a plurality of connecting shafts (5) corresponding one to one with the first bearings (4), the first bearings (4) are rotatably connected to the connecting shafts (5), a side wall of the connecting shaft (5) is provided with an annular step (51), and the end face of the first bearing (4) abuts against the annular step (51); A crankshaft balancing block (6) is also provided on the output shaft of the driving motor (3), the crankshaft balancing block (6) comprising a balancing shaft (61) coaxially arranged on the inner side wall of the internal gear (21), an eccentric block (62) coaxially eccentrically arranged on the end face of the balancing shaft (61), and an abutting block (63) fixedly connected to the side wall of the eccentric block (62), wherein the abutting block (63) abuts against the end face of the internal gear (21); The drive motor (3) comprises a housing (31), a rotor (34) disposed in the housing (31), and a front end cover (32) and a rear end cover (33) disposed at both ends of the housing (31); the outer gear ring (22) is fixedly connected to the end surface of the front end cover (32) facing away from the housing (31); a plurality of conductive rods (341) are provided on the rotor (34) along a circumferential direction, and both ends of the conductive rods (341) protrude from the end surface of the rotor (34) in the axial direction.

2. An aerator according to claim 1, characterized in that: A second bearing (7) is coaxially connected to the balancing shaft (61), and the inner side wall of the internal gear (21) is fixed to the outer ring of the second bearing (7).

3. An aerator according to claim 2, characterized in that: A third bearing (8) is coaxially connected to the balancing shaft (61) on the side of the second bearing (7) facing away from the drive motor (3), and the inner side wall of the inner connecting transmission plate (24) is fixed to the outer ring of the third bearing (8).

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