Centrifugal fan air cooling bearing box structure and centrifugal fan transmission set

Abstract

The invention discloses a centrifugal fan air cooling bearing box structure and a centrifugal fan transmission set, and relates to the technical field of bearing boxes. By arranging the lubrication execution assembly, low-temperature lubricating oil in the low-temperature oil cavity can be thrown out by means of the first oil flinger, part of the thrown-out lubricating oil can enter the bearing installation cavity for lubrication, and the purpose of conducting automatic lubrication through power of a transmission shaft of the lubrication execution assembly is achieved; by arranging the lubricating oil preliminary cooling assembly, heated lubricating oil with impurities can be thrown into an arc-shaped heat dissipation channel through a second oil flinger, heat exchange is conducted through the outer wall of an upper box body and external air, and therefore the purpose of preliminary cooling is achieved; and when the lubricating oil passes through the first-stage filtering cavity, the second-stage filtering cavity and the third-stage filtering cavity, metal impurities with different particle sizes in the lubricating oil can be filtered, and the lubricating oil can be purified with various precisions while heat dissipation is carried out.

Description

Technical Field

[0001] The invention relates to the technical field of bearing boxes, and in particular to an air-cooled bearing box structure of a centrifugal fan and a centrifugal fan transmission group. Background Art

[0002] The centrifugal fan air-cooled bearing box is an important part of the centrifugal fan, mainly including the bearing box, bearings and sealing devices. The bearing box is the main component that supports and accommodates the bearings, provides a reliable support point for the rotating shaft, and also bears the weight from the rotating shaft and impeller, as well as the radial force and axial force generated during operation. The sealing device is to prevent the leakage of lubricating oil and the entry of foreign impurities.

[0003] A centrifugal fan air-cooled rolling bearing box disclosed in the patent application with reference publication number CN211343464U has an oil-slinging plate structure arranged on a section of the fan shaft located inside the oil storage chamber and close to the side of the axial cooling fan. Therefore, the design is reasonable and the structure is compact. The rolling bearing and the bearing box can be effectively cooled in a high-temperature operating environment without cooling water, thereby ensuring the safe and stable operation of the fan. This not only saves a lot of water and electricity resources for the fan users, but also effectively avoids environmental pollution. The above-mentioned bearing box structure in the prior art has the following defects in actual use: The existing bearing box only relies on the heat exchange between the box wall and the air to cool the lubricating oil. However, due to the relatively small volume of the bearing box body, the area that can be provided for the heat exchange between the lubricating oil and the air is extremely limited, and the flow channel for the heat dissipation of the lubricating oil is short. When the temperature of the lubricating oil has not dropped to a suitable temperature, it is transported to the bearing position to participate in the lubrication work. With the superposition of working time, the temperature of the lubricating oil rises rapidly, causing the viscosity of the lubricating oil to decrease, affecting the lubrication effect; Since the heat dissipation in the bearing box is the same in different environments, in severe cold environments, when there is no need for excessive heat dissipation, the bearing box is very likely to increase the viscosity of the lubricating oil due to excessive heat dissipation, thereby failing to fully lubricate the bearing and aggravating the wear of the bearing; 3) Metal debris formed by mechanical wear is mixed in the lubricating oil. During the flow of the lubricating oil, the metal debris inside will enter the bearing again, causing wear on the bearing operation; Therefore, the present invention proposes an air-cooled bearing box structure of a centrifugal fan and a centrifugal fan transmission group to solve the above problems. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides an air-cooled bearing box structure for a centrifugal fan and a centrifugal fan transmission group, which solve the problems that the area of ​​the current bearing box body that can be provided for heat exchange between the lubricating oil and air is extremely limited and the flow channel for heat dissipation of the lubricating oil is short, resulting in the lubricating oil being transported to the bearing position to participate in lubrication work before the temperature of the lubricating oil drops to an appropriate temperature, and the lubricating oil temperature rises rapidly with the accumulation of working time, causing the viscosity of the lubricating oil to decrease, affecting the lubrication effect, and the heat dissipation in the bearing box is the same under different environments, resulting in the bearing box being very easy to increase the viscosity of the lubricating oil due to the large heat dissipation when there is no need for excessive heat dissipation in a severely cold environment, thereby failing to fully lubricate the bearing, and the metal friction debris mixed in the lubricating oil will re-enter the interior of the bearing during the flow process, causing wear on the operation of the bearing.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: A centrifugal fan air-cooled bearing box structure, including a lower box and an upper box arranged on the top thereof, wherein the lower box and the upper box are provided with a transmission shaft rotatably arranged inside through a bearing, and further comprising: A lubrication actuator assembly, comprising a buffer oil chamber and a bearing installation chamber which are jointly provided on both sides of the lower housing and the upper housing, the buffer oil chamber and the bearing installation chamber being connected via an oil return groove, a pressure cover being fixedly provided on the side wall of the bearing installation chamber, an oil inlet groove being connected to the inside of the bearing installation chamber being provided on the top of the pressure cover, and a No. 1 oil thrower plate for throwing lubricating oil into the oil inlet groove being fixedly provided on the outer wall of the transmission shaft; The lubricating oil preliminary cooling component comprises a high-temperature oil chamber and a low-temperature oil chamber which are provided on the left and right sides of the lower housing, the high-temperature oil chamber and the low-temperature oil chamber being connected via an oil return hole, return flow grooves being provided on both sides of the outer wall of the high-temperature oil chamber, and an arc-shaped heat dissipation oil passage being provided inside the upper housing, an oil-slinging groove connected to the arc-shaped heat dissipation oil passage being provided on the top of the cache oil chamber, a second oil-slinging plate being provided on the outer wall of the transmission shaft and located in a fixed sleeve inside the cache oil chamber, and oil guide grooves connected to both ends of the arc-shaped heat dissipation oil passage being provided on both sides of the top of the lower housing, respectively. The lubricating oil after preliminary cooling by the lubricating oil preliminary cooling component is then secondarily cooled through two lubricating oil processing mechanisms.

[0006] Furthermore, the centrifugal fan air-cooled bearing box structure also includes a turbulent fan, which is fixedly sleeved on the outer wall of the transmission shaft and is used to disturb the air around the lubricating oil processing mechanism to accelerate the heat exchange speed between the lubricating oil processing mechanism and the air; Two lubricating oil processing mechanisms are respectively arranged on both sides of the outer wall of the lower box body. The lubricating oil processing mechanism is used to connect the two spaces of the oil guide groove and the low-temperature oil chamber on the same side. It can adjust the heat dissipation per unit time according to the use environment, and perform multi-stage filtration on the lubricating oil while cooling the lubricating oil to remove metal impurities of different particle sizes in the lubricating oil.

[0007] Furthermore, the lubricating oil processing mechanism includes an upper vertical plate and a lower vertical plate which are detachably arranged at upper and lower relative positions on the same side of the outer wall of the lower box body, and a plurality of cross-shaped slide grooves are evenly arranged on the outer wall of the upper vertical plate, and an oil drainage through hole connected to the oil guide groove is arranged in the middle position of each cross-shaped slide groove, and a plurality of screws corresponding to the positions of the cross-shaped slide grooves are evenly arranged on the top of the upper vertical plate, and each screw thread penetrates the upper vertical plate and extends to the outside.

[0008] Furthermore, the outer wall of the lower vertical plate is evenly provided with cross-shaped slide grooves 2 corresponding to the positions of the multiple cross-shaped slide grooves 1, each cross-shaped slide groove 2 is provided with an oil inlet hole connected to the reflux groove, and the cross-shaped slide grooves 1 and 2 at relative positions are jointly provided with a lubricating oil processing component, and the bottom end of the screw is rotatably arranged on the top of the lubricating oil processing component at the corresponding position.

[0009] Furthermore, the lubricating oil processing assembly includes a heat exchange tube and a plurality of heat dissipation fins uniformly fixedly arranged on the outer wall thereof, the outer wall of the heat exchange tube is provided with a take-in and take-out port, and the interior of the heat exchange tube is detachably provided with a multi-stage purification unit for filtering the lubricating oil, the multi-stage purification unit can be removed from the heat exchange tube through the take-in and take-out port, and a slider No. 1 and a slider No. 2 are fixedly mounted on both ends of the heat exchange tube respectively.

[0010] Further, the multi-stage purification unit includes a purification cylinder sealed and slidably arranged inside the heat exchange tube and a supporting column fixedly arranged at the center position of the bottom of the inner cavity of the purification cylinder, a lifting groove is opened inside the supporting column, and a partition is fixedly arranged on the relative side walls of the lifting groove and the purification cylinder, a plurality of No. 1 limiting sleeves are evenly fixedly arranged on the inner wall of the purification cylinder, and a No. 2 limiting sleeve corresponding to the positions of the plurality of No. 1 limiting grooves is fixedly arranged on the outer wall of the supporting column, and a primary filter plate, a secondary filter plate and a tertiary filter plate are detachably arranged in the No. 1 limiting sleeves and the No. 2 limiting sleeves at the plurality of relative positions, and the inner diameters of the filter holes of the primary filter plate, the secondary filter plate and the tertiary filter plate decrease successively.

[0011] Furthermore, the primary filter plate, secondary filter plate, tertiary filter plate and partition respectively divide the internal space of the purification cylinder into four spaces: a primary filter chamber, a secondary filter chamber, a tertiary filter chamber and an output buffer chamber. A discharge port is provided at the bottom of the inner cavity of the purification cylinder and between the tertiary filter plate and the partition. A drainage pipe 1 is fixedly provided at the bottom of the purification cylinder, and a cleaning component for simultaneously scrubbing the outer walls of the primary filter plate, the secondary filter plate and the tertiary filter plate is also provided inside the purification cylinder.

[0012] Furthermore, the cleaning component includes a lifting main rod that slides through the lifting slot, a pressure plate is fixedly arranged at the bottom end of the lifting main rod and below the drainage tube, and a plurality of lateral support plates are fixedly arranged at the top of the lifting main rod, and a lifting sub-rod is fixedly arranged at the bottom of each of the lateral support plates, and a plurality of brush plates are evenly fixedly arranged on the outer wall of the lifting sub-rod, and a spring retaining ring is provided on the outer wall of the lifting main rod and inside the lifting slot, a spring is provided on the outer wall of the lifting main rod and below the spring retaining ring, and a spring limit block is fixedly arranged on the inner wall of the lifting slot and at the bottom of the spring.

[0013] Furthermore, the top of the purification cylinder is detachably provided with a sealing cover plate and a filtering through hole opened on the top of the sealing cover plate and opposite to the primary filter cavity area, the sealing cover plate is fixedly provided in the filtering through hole, and a pull ring is fixedly provided on the top of the sealing cover plate through a pull rod.

[0014] In a second aspect, the present invention further discloses a centrifugal fan transmission group, including a coupling for connecting the fan and the motor, the coupling completing the synchronous rotation between the motor and the fan rotor by transmitting torque, and also including a centrifugal fan air-cooled bearing box structure.

[0015] The present invention provides a centrifugal fan air-cooled bearing box structure and a centrifugal fan transmission group. Compared with the prior art, it has the following beneficial effects: 1. A centrifugal fan air-cooled bearing box structure and a centrifugal fan transmission group, which can throw out the lubricating oil with a lower temperature in the low-temperature oil chamber by means of a No. 1 oil-throwing plate, and can let part of the thrown lubricating oil enter the bearing installation chamber for lubrication, thereby achieving the purpose of automatic lubrication by using the power of its own transmission shaft; By setting up a lubricating oil preliminary cooling component, the lubricating oil that has been heated and contains impurities can be thrown into the arc-shaped heat dissipation channel by using the No. 2 oil-flinging plate, and heat exchange is carried out with the help of the outer wall of the upper box body and the external air, thereby achieving the purpose of preliminary cooling. Since the heat dissipation channel is designed to be arc-shaped, the flow time of the lubricating oil can be increased, thereby extending the heat exchange time between the lubricating oil and the air, and achieving the purpose of accelerated cooling. In the present invention, the bearing lubrication process and the lubricating oil preliminary cooling process are both achieved through the power drive of the transmission shaft, and there is no need to set up separate driving devices for the bearing lubrication process and the lubricating oil preliminary cooling process, thereby making the structure simpler and reducing the difficulty of design and manufacturing.

[0016] 2. A centrifugal fan air-cooled bearing box structure and a centrifugal fan transmission group, which can divert the lubricating oil in the arc-shaped heat dissipation channel into multiple lubricating oil treatment components by setting a lubricating oil treatment mechanism, and each lubricating oil treatment component is used as an independent heat dissipation unit to exchange heat with the external air, so as to increase the heat exchange area between the lubricating oil and the air, so as to achieve secondary cooling of the lubricating oil; Moreover, each lubricating oil processing component can slide up and down on the outer walls of the upper vertical plate and the lower vertical plate to achieve blocking or connection between the lubricating oil processing component and the oil drainage holes and the oil inlet holes at the corresponding positions, thereby controlling the number of lubricating oil processing components involved in the lubricating oil cooling work. When the number of lubricating oil processing components involved in the work increases, the heat dissipation of the lubricating oil per unit time can be increased, and vice versa, the heat dissipation of the lubricating oil per unit time can be reduced, so that the temperature of the lubricating oil can be properly adjusted under different working environment temperatures to avoid the situation where the lubricating oil temperature is too high or too low and the bearing cannot be fully cooled.

[0017] 3. A centrifugal fan air-cooled bearing box structure and a centrifugal fan transmission group, by arranging a multi-stage purification component in the lubricating oil treatment component, can filter out metal impurities of different particle sizes in the lubricating oil when the lubricating oil passes through the primary filter chamber, the secondary filter chamber and the tertiary filter chamber, and can purify the lubricating oil with various precisions while achieving heat dissipation; By setting up a cleaning component, the impact force of the lubricating oil discharged through the drainage pipe can be used to push the pressure plate to move, and at the same time, the non-constant characteristic of the lubricating oil flow rate can be used so that when a large flow of lubricating oil acts on the pressure plate, it can be pushed to move down a large distance. When the lubricating oil flow acting on the pressure plate decreases, the pressure plate oil can be reset under the action of the spring force and continue to move upward by using the inertia of upward movement, that is, the brush plate moves back and forth up and down in a "shaking" manner, so that the brush plate can slide up and down along the surface of the first filter plate, the second filter plate or the third filter plate at the corresponding position, and the metal debris on the surface of the first filter plate, the second filter plate and the third filter plate can be peeled off, thereby improving the filtration efficiency of the lubricating oil.

[0018] 4. A centrifugal fan air-cooled bearing box structure and a centrifugal fan transmission group, wherein the multi-stage purification unit and the heat exchange tube are split-type designs, and can be taken out of the heat exchange tube by pulling a pull ring, thereby facilitating the cleaning and replacement of the primary filter plate, the secondary filter plate or the tertiary filter plate, and when cleaning any lubricating oil treatment component, it can be separated from the lubricating oil filtration work first, even if the oil discharge holes and the oil inlet holes at the two ends and corresponding positions of the heat exchange tube are misaligned to block the circulation of the lubricating oil, when cleaning any lubricating oil treatment component, it will not affect the lubricating oil treatment components at other positions, so that the centrifugal fan air-cooled bearing box structure and the centrifugal fan transmission group can continue to work.

[0019] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and to some extent, will be obvious to those skilled in the art based on the following examination and study, or can be taught from the practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the first overall three-dimensional structure of the present invention; Figure 2 It is a schematic diagram of the second overall three-dimensional structure of the present invention; Figure 3 It is a schematic diagram of the first cross-sectional structure of the present invention; Figure 4 It is a second cross-sectional structural schematic diagram of the present invention; Figure 5 It is a third cross-sectional structural schematic diagram of the present invention; Figure 6 For the present invention Figure 5 A schematic diagram of the enlarged structure of part A; Figure 7 It is a schematic diagram of the structure of the first decomposed state of the present invention; Figure 8 It is a schematic diagram of the structure of the second decomposition state of the present invention; Fig. 9 It is a schematic diagram of the structure of the third decomposition state of the present invention; Fig.10 This is a schematic structural diagram of the lubricating oil treatment mechanism of the present invention in a first decomposed state; Fig.11 This is a schematic structural diagram of the lubricating oil treatment mechanism of the present invention in a second decomposed state; Fig.12 This is a schematic diagram of the structure of the lubricating oil treatment assembly of the present invention in a disassembled state; Fig.13 It is a schematic cross-sectional view of the structure of the lubricating oil treatment assembly of the present invention; Fig.14 This is a schematic diagram of the structure of the multi-stage purification unit in the decomposition state of the present invention; Fig.15 This is a schematic diagram of the bottom state structure of the purification cartridge of the present invention; Fig.16 This is a schematic diagram of the internal structure of the purification cartridge of the present invention; Fig.17 This is a schematic diagram of the structure of the cleaning assembly and the primary filter plate, the secondary filter plate, and the tertiary filter plate removed from the purification cartridge of the present invention; Fig.18 It is a schematic diagram of the structure of the cleaning component and the primary filter plate, the secondary filter plate, and the tertiary filter plate in the assembly state of the present invention; Fig.19 For the present invention Fig.18 Schematic diagram of the enlarged structure of part B in FIG.

[0021] In the figure: 1. lower housing; 2. upper housing; 3. bearing; 4. transmission shaft; 5. buffer oil chamber; 6. bearing mounting chamber; 7. oil return groove; 8. high temperature oil chamber; 9. low temperature oil chamber; 10. oil return hole; 11. pressure cover; 12. oil inlet groove; 13. No. 1 oil throwing plate; 14. arc-shaped heat dissipation oil channel; 15. oil throwing groove; 16. No. 2 oil throwing plate; 17. oil guide groove; 18. lubricating oil treatment mechanism; 181. upper vertical plate; 182. lower vertical plate; 183. cross-shaped slide groove 1; 184. oil discharge hole; 185. screw; 186. cross-shaped slide groove 2; 187. oil inlet hole; 188. lubricating oil treatment assembly; 1881. heat exchange tube; 1882. access port; 1883 , multi-stage purification unit; a1, purification cylinder; a2, supporting column; a3, lifting groove; a4, partition; a5, primary filter plate; a6, secondary filter plate; a7, tertiary filter plate; a9, primary filter chamber; a10, secondary filter chamber; a11, tertiary filter chamber; a12, output buffer chamber; a13, discharge port; a14, drainage pipe one; a15, lifting main rod; a16, pressure plate; a17, horizontal support plate; a18, lifting auxiliary rod; a19, brush plate; a20, spring retaining ring; a21, spring; a22, sealing cover plate; a23, drainage pipe two; a24, pull ring; 1884, slider No. 1; 1885, slider No. 2; 19, spoiler fan; 20, reflux groove. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] The present invention provides three technical solutions: an air-cooled bearing box structure of a centrifugal fan, specifically including the following embodiments: like Figure 1-Figure 9 The first embodiment is shown: an air-cooled bearing box structure of a centrifugal fan, comprising a lower box body 1 and an upper box body 2 arranged on the top thereof, wherein a transmission shaft 4 is rotatably arranged inside the lower box body 1 and the upper box body 2 through a bearing 3, the lower box body 1 and the upper box body 2 are connected by bolts, and a sealing gasket is also arranged between the lower box body 1 and the upper box body 2 to prevent lubricating oil leakage, and further comprising: The lubrication actuator assembly includes a buffer oil chamber 5 and a bearing mounting chamber 6 which are jointly provided on both sides of the lower housing 1 and the upper housing 2. The buffer oil chamber 5 and the bearing mounting chamber 6 are connected via an oil return groove 7. A pressure cover 11 is fixedly provided on the side wall of the bearing mounting chamber 6. An oil inlet groove 12 which is connected to the inside of the bearing mounting chamber 6 is provided on the top of the pressure cover 11. A No. 1 oil throwing plate 13 for throwing lubricating oil into the oil inlet groove 12 is fixedly provided on the outer wall of the transmission shaft 4. The first oil-slinging plate 13 is located inside the low-temperature oil chamber 9, and the bottom of the first oil-slinging plate 13 is immersed in the lubricating oil inside the low-temperature oil chamber 9. The lubricating oil inside the oil inlet groove 12 enters the bearing mounting chamber 6 to lubricate the bearing 3, and then enters the buffer oil chamber 5 through the oil return groove 7 to wait for the second oil-slinging plate 16 to be thrown into the arc-shaped heat dissipation oil channel 14 for preliminary cooling. It should be noted here that the design of the first oil-slinging plate 13 can ensure that the thrown lubricating oil moves toward the oil inlet groove 12; The lubricating oil preliminary cooling component includes a high-temperature oil chamber 8 and a low-temperature oil chamber 9 opened on the left and right sides of the lower box body 1. The temperature range of the high-temperature oil chamber 8 is 55°C~65°C, and the temperature range of the low-temperature oil chamber 9 is 35°C~45°C. The high-temperature oil chamber 8 and the low-temperature oil chamber 9 are connected through an oil return hole 10. Both sides of the outer wall of the high-temperature oil chamber 8 are provided with a return flow groove 20, and the interior of the upper box body 2 is provided with an arc-shaped heat dissipation oil channel 14. The top of the cache oil chamber 5 is also provided with an oil-slinging groove 15 connected to the arc-shaped heat dissipation oil channel 14. A second oil-slinging plate 16 is fixedly sleeved on the outer wall of the transmission shaft 4 and located inside the buffer oil chamber 5, and oil guide grooves 17 connected to the two ends of the arc-shaped heat dissipation oil channel 14 are respectively provided on both sides of the top of the lower box body 1. The lubricating oil after preliminary cooling by the lubricating oil preliminary cooling component is then secondarily cooled by two lubricating oil processing mechanisms 18. When the second oil-slinging plate 16 rotates, the lubricating oil in the buffer oil chamber 5 is thrown into the arc-shaped heat dissipation oil channel 14 through the oil-slinging groove 15, and preliminary heat dissipation is carried out through the heat exchange between the outer wall of the upper box body 2 and the air.

[0024] In this embodiment, two lubricating oil processing mechanisms 18 are respectively arranged on both sides of the outer wall of the lower box body 1. The lubricating oil processing mechanism 18 is used to connect the two spaces of the oil guide groove 17 and the low-temperature oil chamber 9 on the same side. It can adjust the heat dissipation per unit time according to the use environment, and perform multi-stage filtration on the lubricating oil while cooling the lubricating oil to remove metal impurities of different particle sizes in the lubricating oil.

[0025] like Figure 10-13 A second embodiment is shown, in which the lubricating oil processing mechanism 18 includes an upper vertical plate 181 and a lower vertical plate 182 which are detachably arranged at upper and lower relative positions on the same side of the outer wall of the lower box body 1, and a plurality of cross-shaped slide grooves 183 are evenly arranged on the outer wall of the upper vertical plate 181, and an oil discharge hole 184 connected to the oil guide groove 17 is arranged in the middle position of each cross-shaped slide groove 183, and a plurality of screws 185 corresponding to the positions of the cross-shaped slide grooves 183 are evenly arranged on the top of the upper vertical plate 181, and each screw 185 is threadedly penetrated through the upper vertical plate 181 and extends to the outside.

[0026] In this embodiment, a cross-shaped slide groove 186 corresponding to the positions of multiple cross-shaped slide grooves 183 is evenly opened on the outer wall of the lower vertical plate 182, and each cross-shaped slide groove 186 is provided with an oil inlet hole 187 connected to the reflux groove 20. A lubricating oil processing component 188 is commonly provided in the cross-shaped slide groove 183 and the cross-shaped slide groove 186 at relative positions, and the bottom end of the screw 185 is rotatably arranged on the top of the lubricating oil processing component 188 at the corresponding position.

[0027] In this embodiment, the lubricating oil treatment assembly 188 includes a heat exchange tube 1881 and a plurality of heat dissipation fins uniformly fixedly arranged on the outer wall thereof. The outer wall of the heat exchange tube 1881 is provided with a take-out port 1882, and the interior of the heat exchange tube 1881 is detachably provided with a multi-stage purification unit 1883 for filtering the lubricating oil. The multi-stage purification unit 1883 can be removed from the heat exchange tube 1881 through the take-out port 1882, and the two ends of the heat exchange tube 1881 are respectively fixedly sleeved with a first slider 1884 and a second slider 1885. 885, the No. 1 slider 1884 and the No. 2 slider 1885 are respectively slidably set in the cross-shaped slide groove 1 183 and the cross-shaped slide groove 2 186 at the corresponding positions. When the bottom end of the No. 2 slider 1885 abuts against the outer wall of the lower box body 1, it is the initial position. At this time, the two ends of the heat exchange tube 1881 are respectively connected with the oil guide groove 17 and the reflux groove 20. When the top end of the No. 1 slider 1884 abuts against the outer wall of the upper vertical plate 181, it is located at the upper limit position. At this time, both ends of the heat exchange tube 1881 are not connected with the oil guide groove 17 and the reflux groove 20 at the corresponding positions.

[0028] like Figure 14-Figure 19A third embodiment is shown, in which the multi-stage purification unit 1883 includes a purification cylinder a1 sealed and slidably arranged inside the heat exchange tube 1881 and a supporting column a2 fixedly arranged at the center position of the bottom of the inner cavity of the purification cylinder a1, a lifting groove a3 is opened inside the supporting column a2, and a partition a4 is fixedly arranged on the relative side walls of the lifting groove a3 and the purification cylinder a1, a plurality of No. 1 limiting sleeves are evenly fixedly arranged on the inner wall of the purification cylinder a1, and a No. 2 limiting sleeve corresponding to the positions of the plurality of No. 1 limiting grooves is fixedly arranged on the outer wall of the supporting column a2, and a first-level filter plate a5, a second-level filter plate a6 and a third-level filter plate a7 are detachably arranged in the No. 1 limiting sleeves and the No. 2 limiting sleeves at the plurality of relative positions, and the inner diameters of the filter holes of the first-level filter plate a5, the second-level filter plate a6 and the third-level filter plate a7 decrease successively.

[0029] In this embodiment, the primary filter plate a5, the secondary filter plate a6, the tertiary filter plate a7 and the partition a4 respectively divide the internal space of the purification cylinder a1 into four spaces, namely, the primary filter chamber a9, the secondary filter chamber a10, the tertiary filter chamber a11 and the output buffer chamber a12. A discharge port a13 is provided at the bottom of the inner cavity of the purification cylinder a1 and between the tertiary filter plate a7 and the partition a4. A drainage pipe a14 is fixedly provided at the bottom of the purification cylinder a1. In addition, a cleaning component for simultaneously scrubbing the outer walls of the primary filter plate a5, the secondary filter plate a6 and the tertiary filter plate a7 is also provided inside the purification cylinder a1.

[0030] In this embodiment, the cleaning component includes a lifting main rod a15 that slides through the lifting groove a3, a pressure plate a16 is fixedly arranged at the bottom end of the lifting main rod a15 and located below the drainage pipe a14, a plurality of transverse support plates a17 are fixedly arranged at the top of the lifting main rod a15, a lifting auxiliary rod a18 is fixedly arranged at the bottom of each transverse support plate a17, a plurality of brush plates a19 are evenly fixedly arranged on the outer wall of the lifting auxiliary rod a18, and a spring retaining ring a20 is located on the outer wall of the lifting main rod a15 and located inside the lifting groove a3, and a spring retaining ring a20 is slidably arranged on the outer wall of the lifting main rod a15 and located below the spring retaining ring a20. A spring a21 is sleeved, and a spring limit block is fixedly arranged on the inner wall of the lifting groove a3 and at the bottom of the spring a21. The top of the spring a21 can be compressed when subjected to a small external force. The pressure plate a16 is a conical structure. A certain distance is reserved between the top of the lifting main rod a15 and the bottom of the sealing cover plate a22, which can meet the activity space when the lifting main rod a15 moves upward, and the amount of lubricating oil entering the purification cylinder a1 never exceeds the top of the primary filter plate a5, the secondary filter plate a6, the tertiary filter plate a7 and the partition plate a4. The bristles on the side wall of the brush plate a19 are set close to the primary filter plate a5, the secondary filter plate a6 or the tertiary filter plate a7. In this embodiment, the top of the purification cylinder a1 is detachably provided with a sealing cover plate a22 and a filtering through hole opened on the top of the sealing cover plate a22 and opposite to the primary filter chamber a9 area, the sealing cover plate a22 is fixedly provided in the filtering through hole, and a pull ring a24 is fixedly provided on the top of the sealing cover plate a22 by a pull rod, the pull ring a24 and the taking and releasing port 1882 are connected by bolts, and a sealing gasket is also provided between the pull ring a24 and the taking and releasing port 1882.

[0031] When in use, the air-cooled bearing box is used for the transmission group of medium and large centrifugal fans. When the air-cooled bearing box is running, the No. 1 oil-slinging plate 13 rotates synchronously with the transmission shaft 4. Since the bottom of the No. 1 oil-slinging plate 13 is immersed in the lubricating oil in the low-temperature oil chamber 9, when it rotates, under the action of centrifugal force, part of the lubricating oil is thrown out by the No. 1 oil-slinging plate 13 and enters the bearing installation chamber 6 through the oil inlet groove 12 to lubricate the bearing 3. The lubricating oil takes away part of the heat in the bearing installation chamber 6 and the metal scraps generated by friction. The high-temperature lubricating oil mixed with impurities enters the cache oil chamber 5 through the oil return groove 7 for temporary cache. Since the bottom of the No. 2 oil-slinging plate 16 is immersed in the lubricating oil in the buffer oil chamber 5, when the No. 2 oil-slinging plate 16 rotates synchronously with the transmission shaft 4, the lubricating oil attached to the outer wall of the No. 2 oil-slinging plate 16 is thrown out under the action of centrifugal force, and part of the lubricating oil enters the arc-shaped heat dissipation oil channel 14 through the oil-slinging groove 15, and exchanges heat with the external air through the outer wall of the upper box body 2. At this time, the temperature of the lubricating oil is initially reduced, and the cooled lubricating oil enters the oil guide groove 17 connected to the two ends of the arc-shaped heat dissipation oil channel 14 through the two ends thereof, and the lubricating oil enters the heat exchange tube 1881 through the oil discharge holes 184 in the multiple lubricating oil processing components 188, and exchanges heat with the external air again through the outer wall of the heat exchange tube 1881. At this time, the temperature of the lubricating oil is further reduced, and the turbulent fan 19 can disturb the surrounding air to accelerate the flow of air near the lubricating oil processing mechanism 18, thereby accelerating the cooling speed of the lubricating oil; After entering the heat exchange tube 1881, the lubricating oil first passes through the drainage pipe a23 to enter the primary filter chamber a9 area opposite to the bottom position of the drainage pipe a23, and then passes through the primary filter plate a5, the secondary filter plate a6 and the tertiary filter plate a7 in turn to enter the output buffer chamber a12 area. At this time, the large particles, small particles and tiny particles of metal debris in the lubricating oil are filtered, and the clean and cooled lubricating oil is flushed on the top of the pressure plate a16 through the discharge port a13 and the drainage pipe a14. Since the amount of lubricating oil flowing down through the drainage pipe a14 is not fixed, the impact force acting on the top of the pressure plate a16 is not fixed. Under the action of a large impact force, the pressure plate a16 moves downward a large distance, and the rise The lowering main rod a15 pulls the multiple lifting auxiliary rods a18 downward synchronously to move, and the multiple brush plates a19 brush the filtering surface of the primary filter plate a5, the secondary filter plate a6 or the tertiary filter plate a7 in a certain area at the corresponding position during the downward movement. Similarly, when the top of the pressure plate a16 is subjected to a small impact force, the lifting main rod a15 is reset under the elastic force of the spring a21, that is, the multiple brush plates a19 move up synchronously. Since there are multiple brush plates a19, and the distance between two adjacent brush plates a19 is set small, the brush plates a19 can cover the entire filtering surface of the primary filter plate a5, the secondary filter plate a6 or the tertiary filter plate a7 during the upward and downward movement, and the multiple brush plates a19 perform a brushing operation in a reciprocating and shaking manner up and down; The filtered lubricating oil enters the reflux groove 20 through the bottom of the heat exchange tube 1881 and then enters the high-temperature oil chamber 8 for sedation. Then the lubricating oil enters the low-temperature oil chamber 9 through the oil return hole 10 and is thrown out by the No. 1 oil thrower 13 to the oil inlet groove 12 for lubrication. When the cooling amount of the lubricating oil needs to be adjusted, the lubricating oil processing assembly 188 at the corresponding position is pulled upward by rotating the screw 185, and the second slider 1885 in the lubricating oil processing assembly 188 at the corresponding position moves up along the cross-shaped slide groove 186, and the opening at the bottom end of the heat exchange tube 1881 is gradually displaced from the position relative to the oil inlet through hole 187, until the first slider 1884 moves up along the cross-shaped slide groove 183 to the outer wall of the upper vertical plate 181. At this time, the upper end opening of the heat exchange tube 1881 is away from the oil discharge through hole 184 and forms a closed structure with the inner wall of the cross-shaped slide groove 183, and the first slider 1884 discharges the oil The through hole 184 is blocked, and at the same time, the bottom opening of the second slider 1885 moves upward and forms a closed structure with the inner wall of the second cross-shaped slide groove 186, while the oil inlet through hole 187 is blocked by the second slider 1885, and the lubricating oil cannot flow through the heat exchange tube 1881 at this position. When the number of lubricating oil processing components 188 participating in the lubricating oil cooling work is reduced, the lubricating oil can only be dissipated through a smaller number of lubricating oil processing components 188, thereby achieving the purpose of reducing the heat dissipation. On the contrary, after the lubricating oil processing components 188 are restored to their original positions, they can participate in the cooling of the lubricating oil again, thereby increasing the heat dissipation per unit time. An embodiment of the present invention further provides a centrifugal fan transmission group, including a coupling for connecting the fan and the motor, the coupling completing the synchronous rotation between the motor and the fan rotor by transmitting torque, and also including a centrifugal fan air-cooled bearing box structure.

[0032] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0033] Although 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 present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A centrifugal fan air-cooled bearing box structure, comprising a lower box and an upper box arranged on the top thereof, wherein a transmission shaft is rotatably arranged inside the lower box and the upper box through a bearing, characterized in that: Also includes: A lubrication actuator assembly, comprising a buffer oil chamber and a bearing installation chamber which are jointly provided on both sides of the lower housing and the upper housing, the buffer oil chamber and the bearing installation chamber being connected via an oil return groove, a pressure cover being fixedly provided on the side wall of the bearing installation chamber, an oil inlet groove being connected to the inside of the bearing installation chamber being provided on the top of the pressure cover, and a No. 1 oil thrower plate for throwing lubricating oil into the oil inlet groove being fixedly provided on the outer wall of the transmission shaft; The lubricating oil preliminary cooling component comprises a high-temperature oil chamber and a low-temperature oil chamber which are provided on the left and right sides of the lower housing, the high-temperature oil chamber and the low-temperature oil chamber being connected via an oil return hole, return flow grooves being provided on both sides of the outer wall of the high-temperature oil chamber, and an arc-shaped heat dissipation oil channel being provided inside the upper housing, an oil-slinging groove connected to the arc-shaped heat dissipation oil channel being provided on the top of the cache oil chamber, a second oil-slinging plate being provided on the outer wall of the transmission shaft and located in a fixed sleeve inside the cache oil chamber, and oil guide grooves connected to both ends of the arc-shaped heat dissipation oil channel being provided on both sides of the top of the lower housing, respectively. The lubricating oil after preliminary cooling by the lubricating oil preliminary cooling component is then secondarily cooled through two lubricating oil processing mechanisms.

2. The air-cooled bearing box structure of a centrifugal fan according to claim 1, characterized in that: The centrifugal fan air-cooled bearing box structure also includes a turbulent fan, which is fixedly sleeved on the outer wall of the transmission shaft and is used to disturb the air around the lubricating oil processing mechanism to accelerate the heat exchange speed between the lubricating oil processing mechanism and the air; Two lubricating oil processing mechanisms are respectively arranged on both sides of the outer wall of the lower box body. The lubricating oil processing mechanism is used to connect the two spaces of the oil guide groove and the low-temperature oil chamber on the same side. It can adjust the heat dissipation per unit time according to the use environment, and perform multi-stage filtration on the lubricating oil while cooling the lubricating oil to remove metal impurities of different particle sizes in the lubricating oil.

3. The air-cooled bearing box structure of a centrifugal fan according to claim 2, characterized in that: The lubricating oil processing mechanism includes an upper vertical plate and a lower vertical plate that are detachably arranged at upper and lower relative positions on the same side of the outer wall of the lower box body, and a plurality of cross-shaped slide grooves are evenly arranged on the outer wall of the upper vertical plate, and an oil discharge through hole connected to the oil guide groove is opened in the middle position of each cross-shaped slide groove, and a plurality of screw rods corresponding to the positions of the cross-shaped slide grooves are evenly arranged on the top of the upper vertical plate, and each screw rod thread penetrates the upper vertical plate and extends to the outside.

4. The air-cooled bearing box structure of a centrifugal fan according to claim 3, characterized in that: The outer wall of the lower vertical plate is evenly provided with cross-shaped slide grooves 2 corresponding to the positions of the multiple cross-shaped slide grooves 1. Each cross-shaped slide groove 2 is provided with an oil inlet hole connected to the reflux groove. The cross-shaped slide grooves 1 and 2 at relative positions are jointly provided with a lubricating oil processing component. The bottom end of the screw is rotatably arranged on the top of the lubricating oil processing component at the corresponding position.

5. The air-cooled bearing box structure of a centrifugal fan according to claim 4, characterized in that: The lubricating oil processing component includes a heat exchange tube and a plurality of heat dissipation fins uniformly and fixedly arranged on the outer wall thereof. The outer wall of the heat exchange tube is provided with a take-in and take-out port, and a multi-stage purification unit for filtering the lubricating oil is detachably arranged inside the heat exchange tube. The multi-stage purification unit can be removed from the heat exchange tube through the take-in and take-out port, and a first slider and a second slider are fixedly sleeved on both ends of the heat exchange tube respectively.

6. The air-cooled bearing box structure of a centrifugal fan according to claim 5, characterized in that: The multi-stage purification unit includes a purification cylinder sealed and slidably arranged inside the heat exchange tube and a supporting column fixedly arranged at the center position of the bottom of the inner cavity of the purification cylinder, a lifting groove is opened inside the supporting column, and a partition is fixedly arranged on the lifting groove and the opposite side walls of the purification cylinder, a plurality of No. 1 limiting sleeves are evenly fixedly arranged on the inner wall of the purification cylinder, and a No. 2 limiting sleeve corresponding to the positions of the plurality of No. 1 limiting grooves is fixedly arranged on the outer wall of the supporting column, and a primary filter plate, a secondary filter plate and a tertiary filter plate are detachably arranged in the No. 1 limiting sleeves and the No. 2 limiting sleeves at the plurality of relative positions, respectively, and the inner diameters of the filter holes of the primary filter plate, the secondary filter plate and the tertiary filter plate decrease successively.

7. The air-cooled bearing box structure of a centrifugal fan according to claim 6, characterized in that: The primary filter plate, secondary filter plate, tertiary filter plate and partition respectively divide the internal space of the purification cylinder into four spaces, namely, a primary filter chamber, a secondary filter chamber, a tertiary filter chamber and an output buffer chamber. A discharge port is provided at the bottom of the inner cavity of the purification cylinder and between the tertiary filter plate and the partition. A drainage pipe 1 is fixedly provided at the bottom of the purification cylinder, and a cleaning component for simultaneously scrubbing the outer walls of the primary filter plate, the secondary filter plate and the tertiary filter plate is also provided inside the purification cylinder.

8. The air-cooled bearing box structure of a centrifugal fan according to claim 7, characterized in that: The cleaning component includes a lifting main rod that slides through the lifting slot, a pressure plate is fixedly arranged at the bottom end of the lifting main rod and below the drainage pipe, a plurality of transverse support plates are also fixedly arranged at the top of the lifting main rod, a lifting sub-rod is fixedly arranged at the bottom of each of the transverse support plates, a plurality of brush plates are evenly fixedly arranged on the outer wall of the lifting sub-rod, and a spring retaining ring is arranged on the outer wall of the lifting main rod and inside the lifting slot, a spring is slidably sleeved on the outer wall of the lifting main rod and below the spring retaining ring, and a spring limit block is fixedly arranged on the inner wall of the lifting slot and at the bottom of the spring.

9. The air-cooled bearing box structure of a centrifugal fan according to claim 8, characterized in that: The top of the purification cylinder is detachably provided with a sealing cover plate and a filtering through hole opened on the top of the sealing cover plate and opposite to the primary filtering cavity area. The sealing cover plate is fixedly provided in the filtering through hole, and a pull ring is fixedly provided on the top of the sealing cover plate through a pull rod.

10. A centrifugal fan transmission assembly, comprising a coupling for connecting a fan and a motor, the coupling completing synchronous rotation between the motor and the fan rotor by transmitting torque, characterized in that: It also includes the centrifugal fan air-cooled bearing box structure as described in any one of claims 1-9.

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