High-speed heavy-load horizontal middle-open type double-suction centrifugal fan

Abstract

The invention particularly relates to a high-speed heavy-load horizontal middle-open type double-suction centrifugal fan, which belongs to the technical field of fan reliability improvement, and comprises a volute part, a rotor part, a non-shaft extension end automatic centering bearing part, a shaft extension end automatic centering bearing part, a two-end support type bearing part automatic centering integral support, an integral foundation frame and a motor, the volute part is mounted on the two-end supporting type bearing part self-centering integral support; the rotor part is installed in the volute part, and the two ends of the rotor part extend out of the volute part and are installed on the bearing part overall support through the non-shaft extension end automatic centering bearing part and the shaft extension end automatic centering bearing part. The two-end supporting type bearing part automatic centering integral support and the motor are both installed on the integral foundation frame, and the rotor part is connected with the motor. The reliability of the equipment is guaranteed.

Description

Technical Field

[0001] This invention relates to the field of reliability improvement technology for high-speed heavy-duty double-suction centrifugal fans, and in particular to a high-speed heavy-duty horizontal split-type double-suction centrifugal fan. Background Technology

[0002] In major projects such as large power plants, high-speed, heavy-duty double-suction centrifugal fans are widely used electromechanical equipment. Their main function is to provide forced ventilation to relevant areas, and their reliability is crucial. Currently, common high-speed, heavy-duty double-suction centrifugal fans suffer from the following problems:

[0003] 1. The bearing housing cannot ensure concentricity, which leads to abnormal load on the rolling bearing installed in the bearing housing and accelerates wear and failure, seriously affecting the reliability of the equipment.

[0004] 2. The inner ring of the rolling bearing is directly interference-fitted onto the fan shaft. When carrying out equipment maintenance, special tools are required to disassemble and assemble the rolling bearing in a narrow space, which is very inconvenient.

[0005] 3. The coupling is directly interference-fitted onto the fan shaft. When carrying out equipment maintenance, special tools are required to disassemble and assemble the coupling in a narrow space, which is very inconvenient.

[0006] Therefore, it is necessary to develop a high-speed, heavy-duty, horizontally split-type double-suction centrifugal fan to effectively solve the above problems and ensure the reliability of the equipment. Summary of the Invention

[0007] One of the objectives of this invention is to provide a high-speed, heavy-duty, horizontally split-type double-suction centrifugal fan that fundamentally solves the problem that the inability of the bearing housing to ensure concentricity leads to abnormal stress on the rolling bearing and aggravated wear and failure.

[0008] The second objective of this invention is to provide a high-speed, heavy-duty, horizontally split-type double-suction centrifugal fan, which fundamentally solves the problem of inconvenient disassembly and assembly of rolling bearings during equipment maintenance.

[0009] The third objective of this invention is to provide a high-speed, heavy-duty, horizontally split-type double-suction centrifugal fan, which fundamentally solves the problem of inconvenient disassembly and assembly of couplings during equipment maintenance.

[0010] The high-speed, heavy-duty, horizontally split-type double-suction centrifugal fan of the present invention ensures the reliability of the equipment.

[0011] To achieve the above objectives, the present invention provides the following technical solution:

[0012] A high-speed, heavy-duty, horizontally split-type double-suction centrifugal fan includes a volute assembly, a rotor assembly, a non-shaft extension end self-centering bearing assembly, a shaft extension end self-centering bearing assembly, a two-end supported bearing assembly self-centering integral support, an integral foundation frame, and a motor.

[0013] The volute assembly is mounted on the self-centering integral support of the bearing assembly with two-end support; the rotor assembly is mounted inside the volute assembly, with both ends extending outside the volute assembly and mounted on the bearing assembly integral support through the self-centering bearing assembly at the non-shaft extension end and the self-centering bearing assembly at the shaft extension end; the self-centering integral support of the bearing assembly with two-end support and the motor are both mounted on the integral base frame, and the rotor assembly is connected to the motor.

[0014] In one specific embodiment, the rotor component includes an impeller, a shaft, and a coupling; the motor output shaft is connected to the shaft via the coupling to drive the shaft to rotate; the coupling and the shaft are fitted through a tapered hole; the shaft is connected to the impeller via a key to transmit torque to the impeller.

[0015] In one specific embodiment, the non-shaft extension end automatic centering bearing component is a convenient core-pulling type, belonging to the fixed end of the rotor component, including a first outer bearing cover, a first bearing chamber, a first grease nipple, a fourth bolt, a first inner upper half bearing cover, a bearing sleeve adjusting ring, a first felt ring, a first inner lower half bearing cover, a first bearing sleeve, a first rolling bearing, a first bearing spacer, a fifth bolt, a third flat washer, a first bearing sleeve retaining ring, a first round nut, a first round nut locking washer, a sixth bolt, and a second tapered pin;

[0016] The first outer bearing cover is a solid circle structure; the circular flange end face of the first outer bearing cover is uniformly machined with through holes for installing the fourth bolt; the circular flange end face of the first outer bearing cover is uniformly machined with threaded holes for installing set screws; the inner side of the first outer bearing cover is machined with a solid circle boss for axial positioning of the outer side of the first rolling bearing.

[0017] The first inner bearing cover is a split type, consisting of the upper half of the first inner bearing cover and the lower half of the first inner bearing cover connected by a sixth bolt; the first felt ring is inside the first inner bearing cover;

[0018] The upper half of the first inner bearing cover and the lower half of the first inner bearing cover have through holes machined evenly on their semi-circular flange end faces for installing the fourth bolt; the lower half of the first inner bearing cover has a semi-circular boss machined on its inner side for positioning in conjunction with the arc of the first bearing housing.

[0019] The first bearing housing is an integral cylindrical structure with a semi-circular flange at the bottom; the top of the first bearing housing is machined with a threaded through hole for installing the first grease fitting; a round boss is machined at the central through hole of the first bearing housing for axial positioning of the inner side of the first rolling bearing; threaded holes are uniformly machined on the circular planes at both ends of the first bearing housing for installing the fourth bolt.

[0020] The lower semi-circular flange end face of the first bearing housing has uniformly machined through holes for installing the fifth bolt; the fifth bolt is fitted with a third flat washer; the lower semi-circular flange end face of the first bearing housing has uniformly machined tapered holes for installing the second tapered pin; the lower semi-circular flange end face of the first bearing housing has uniformly machined threaded holes for installing set screws.

[0021] The bearing sleeve adjusting ring is a full circle structure, which is sleeved on the shaft. Its end face fits against the end face of the shaft and the end face of the first bearing sleeve. It is used to adjust the axial position of the rotor component by adjusting the thickness of the bearing sleeve adjusting ring.

[0022] The first bearing sleeve is a double-sided symmetrical L-shaped bushing; a keyway is machined in the inner hole of the first bearing sleeve for transmitting torque through key-shaft engagement; the first rolling bearing is interference-fitted onto the first bearing sleeve; the first bearing spacer separates the first rolling bearing to facilitate the addition of grease through the first grease nipple; the first bearing sleeve retaining ring, the first round nut, and the first round nut locking washer are used to fix the first bearing sleeve onto the shaft.

[0023] In one specific embodiment, the automatic centering bearing component at the shaft extension end is a convenient core-pulling type, belonging to the floating end of the rotor component, including a second felt ring, a second inner upper half bearing cover, a second rolling bearing, a second grease nipple, a second bearing chamber, a seventh bolt, an outer upper half bearing cover, a third felt ring, an outer lower half bearing cover, a second round nut, a second round nut locking washer, a second bearing sleeve retaining ring, an eighth bolt, a fourth flat washer, a second bearing spacer, a second bearing sleeve, a second inner lower half bearing cover, a ninth bolt, and a third tapered pin;

[0024] The second inner bearing cover is a split type, consisting of the upper half of the second inner bearing cover and the lower half of the second inner bearing cover; the second felt ring is inside the inner bearing cover;

[0025] The upper half of the second inner bearing cover and the lower half of the second inner bearing cover each have through holes uniformly machined on their semi-circular flange end faces for installing the seventh bolt; a semi-circular boss is machined on the inner side of the lower half of the second inner bearing cover for positioning in conjunction with the arc of the second bearing housing.

[0026] The second outer bearing cover is a split type, consisting of an upper outer bearing cover and a lower outer bearing cover connected by a ninth bolt; the third felt ring is inside the second outer bearing cover; through holes are evenly machined on the semi-circular flange end faces of the upper outer bearing cover and the lower outer bearing cover for installing the seventh bolt; a semi-circular boss is machined on the inner side of the lower outer bearing cover for positioning in conjunction with the arc of the second bearing housing.

[0027] The second bearing housing is an integral cylindrical structure with a semi-circular flange at the bottom. A threaded through hole is machined at the top of the second bearing housing for installing the second grease fitting. Threaded holes are evenly machined on the circular planes at both ends of the second bearing housing for installing the seventh bolt. Through holes are evenly machined on the plane of the lower semi-circular flange of the second bearing housing for installing the eighth bolt. A fourth flat washer is fitted onto the eighth bolt. Threaded holes are evenly machined on the end face of the lower semi-circular flange of the second bearing housing for installing set screws. Conical holes are evenly machined on the end face of the lower semi-circular flange of the second bearing housing for installing the third tapered pin.

[0028] The second bearing sleeve is a double-sided symmetrical L-shaped bushing; a keyway is machined in the inner hole of the second bearing sleeve for transmitting torque through key-shaft engagement; the second rolling bearing is interference-fitted onto the second bearing sleeve; the second bearing spacer separates the second rolling bearing for easy grease addition via the second grease fitting; the second bearing sleeve retaining ring, the second round nut, and the second round nut locking washer are used to fix the second bearing sleeve onto the shaft.

[0029] In one specific embodiment, the self-centering integral support for the two-end supported bearing components includes a self-centering support for the non-extension bearing component, a self-centering support for the extension bearing component, an integral lower panel, and an integral upper panel; the integral upper panel and the integral lower panel are welded together by vertical stiffeners and multiple second reinforcing stiffeners; the self-centering support for the non-extension bearing component and the self-centering support for the extension bearing component are welded to each other on the integral upper panel.

[0030] In one specific embodiment, the upper part of the automatic centering support for the non-shaft extension bearing component is a semi-circular arc structure with concentricity tolerance meeting standard requirements, which is used to closely cooperate with the overall cylindrical structure of the first bearing chamber to achieve precise automatic centering of the arc of the automatic centering bearing component at the non-shaft extension end.

[0031] The semi-circular flange end face of the automatic centering support for the non-shaft extension bearing component is fitted and connected to the lower semi-circular flange end face of the first bearing chamber; threaded holes are uniformly machined on the semi-circular flange end face of the automatic centering support for the non-shaft extension bearing component for connection with the fifth bolt; tapered holes are uniformly machined on the semi-circular flange end face of the automatic centering support for the non-shaft extension bearing component for connection with the second tapered pin.

[0032] The automatic centering support component for the non-shaft extension bearing part has flow channels machined on its vertical surface and is reinforced with welded ribs.

[0033] In one specific embodiment, the upper part of the automatic centering support for the shaft extension bearing component is a semi-circular arc structure with concentricity tolerance meeting standard requirements, which is used to closely cooperate with the overall cylindrical structure of the second bearing chamber to achieve precise automatic centering of the arc of the automatic centering bearing component at the shaft extension end.

[0034] The semi-circular flange end face of the automatic centering support component of the shaft extension bearing assembly is fitted and connected to the lower semi-circular flange end face of the second bearing chamber; threaded holes are uniformly machined on the semi-circular flange end face of the automatic centering support component of the shaft extension bearing assembly for connection with the eighth bolt; tapered holes are uniformly machined on the semi-circular flange end face of the automatic centering support component of the shaft extension bearing assembly for connection with the third tapered pin.

[0035] The automatic centering support component of the shaft extension bearing assembly has flow channels machined on its vertical surface and is reinforced with welded ribs.

[0036] In one specific embodiment, a third precision-machined pad and a fourth precision-machined pad are welded to the overall upper panel; a third lifting lug is welded to the overall upper panel for hoisting the automatic centering support of the bearing components supported at both ends; a position adjustment screw device is welded to the overall upper panel for adjusting the front, back, left, and right positions of the volute component; and a fifth precision-machined pad is welded to the bottom of the overall lower panel.

[0037] In one specific embodiment, the overall base frame includes a wind turbine-side overall base frame and a motor-side overall base frame; the self-centering overall support of the two-end supported bearing components is installed on the wind turbine-side overall base frame, and the motor is installed on the motor-side overall base frame.

[0038] Beneficial technical effects of the present invention:

[0039] The high-speed, heavy-duty horizontal split-type double-suction centrifugal fan of the present invention ensures the centering of the bearing housing during the machining of the integral support with the bearing components supported at both ends. This fundamentally solves the problem of abnormal stress on the rolling bearing and accelerated wear failure caused by the inability to ensure the concentricity of the bearing housing. Furthermore, by installing a tapered coupling at the shaft extension end, the problem of inconvenient disassembly and assembly of the coupling during equipment maintenance can be fundamentally solved. Attached Figure Description

[0040] Figure 1 This is a three-dimensional assembly drawing of an embodiment of the high-speed, heavy-duty, horizontally split-type double-suction centrifugal fan of the present invention;

[0041] Figure 2 This is a two-dimensional assembly drawing of an embodiment of the high-speed, heavy-duty, horizontally split-type double-suction centrifugal fan of the present invention;

[0042] Figure 3 This is a two-dimensional assembly drawing of the fan side of an embodiment of the high-speed, heavy-duty horizontal split-type double-suction centrifugal fan of the present invention;

[0043] Figure 4 This is a three-dimensional assembly drawing of the fan casing of an embodiment of the high-speed, heavy-duty horizontal split-type double-suction centrifugal fan of the present invention;

[0044] Figure 5 This is a three-dimensional assembly drawing of the lower volute of an embodiment of the high-speed, heavy-duty horizontal split-type double-suction centrifugal fan of the present invention;

[0045] Figure 6 This is a three-dimensional assembly drawing of the upper volute of an embodiment of the high-speed, heavy-duty horizontal split-type double-suction centrifugal fan of the present invention;

[0046] Figure 7 This is a three-dimensional assembly drawing of the air inlet assembly of an embodiment of the high-speed, heavy-duty horizontal split-open double-suction centrifugal fan of the present invention.

[0047] Figure 8 This is a three-dimensional assembly drawing of the rotor assembly of an embodiment of the high-speed, heavy-duty horizontal split-open double-suction centrifugal fan of the present invention;

[0048] Figure 9 This is a three-dimensional assembly drawing of the non-shaft extension end automatic centering bearing component of an embodiment of the high-speed heavy-duty horizontal split-type double-suction centrifugal fan of the present invention;

[0049] Figure 10 This is a two-dimensional assembly drawing of the non-shaft extension end automatic centering bearing component of an embodiment of the high-speed heavy-duty horizontal split-type double-suction centrifugal fan of the present invention;

[0050] Figure 11 This is a three-dimensional assembly drawing of the automatic centering bearing component at the shaft extension end of an embodiment of the high-speed heavy-duty horizontal split-type double-suction centrifugal fan of the present invention.

[0051] Figure 12 This is a two-dimensional assembly drawing of the automatic centering bearing component at the shaft extension end of an embodiment of the high-speed, heavy-duty horizontal split-type double-suction centrifugal fan of the present invention.

[0052] Figure 13 This is a three-dimensional assembly drawing of the automatic centering integral support for the two-end supported bearing components of an embodiment of the high-speed heavy-duty horizontal split-type double-suction centrifugal fan of the present invention.

[0053] Figure 14 This is a three-dimensional assembly drawing of the overall basic frame of an embodiment of the high-speed, heavy-duty horizontal split-type double-suction centrifugal fan of the present invention.

[0054] In the picture:

[0055] 1. Volute housing assembly; 2. Rotor assembly; 3. Non-shaft extension end self-centering bearing assembly; 4. Shaft extension end self-centering bearing assembly; 5. Two-end supported bearing assembly self-centering integral support; 6. Overall foundation frame; 7. Motor;

[0056] 201. Impeller; 202. Shaft; 203. Coupling;

[0057] 301. First outer bearing cap; 302. First bearing housing; 303. First grease nipple; 304. Fourth bolt; 305. First inner upper half bearing cap; 306. Bearing sleeve adjusting ring; 307. First felt ring; 308. First inner lower half bearing cap; 309. First bearing sleeve; 310. First rolling bearing; 311. First bearing spacer; 312. Fifth bolt; 313. Third flat washer; 314. First bearing sleeve retaining ring; 315. First round nut; 316. First round nut locking washer; 317. Sixth bolt; 318. Second tapered pin;

[0058] 401. Second felt ring; 402. Second inner upper half bearing cap; 403. Second rolling bearing; 404. Second grease nipple; 405. Second bearing housing; 406. Seventh bolt; 407. Outer upper half bearing cap; 408. Third felt ring; 409. Outer lower half bearing cap; 410. Second round nut; 411. Second round nut locking washer; 412. Second bearing sleeve retaining ring; 413. Eighth bolt; 414. Fourth flat washer; 415. Second bearing spacer ring; 416. Second bearing sleeve; 417. Second inner lower half bearing cap; 418. Ninth bolt; 419. Third tapered pin;

[0059] 501. Automatic centering support for non-shaft extension end bearing components; 502. Automatic centering support for shaft extension end bearing components; 503. Third precision-machined pad; 504. Fourth precision-machined pad; 505. Fifth precision-machined pad; 506. Overall lower panel; 507. Overall upper panel; 508. Vertical stiffener; 509. Third lifting lug; 510. Adjusting set screw device;

[0060] 601. Overall foundation frame on the wind turbine side; 602. Overall foundation frame on the motor side;

[0061] 1101. Lower volute rear cover plate; 1102. Lower volute front cover plate; 1103. First right side split flange; 1104. Lower volute flow channel shell; 1105. First left side split flange; 1106. Support leg; 1107. First precision-machined pad; 1108. Second precision-machined pad; 1109. First reinforcing rib plate; 1110. First bolt; 1111. First flat washer; 1112. First tapered pin;

[0062] 1201. Upper volute rear cover plate; 1202. Upper volute front cover plate; 1203. Second right side split flange; 1204. Upper volute flow channel shell; 1205. Second left side split flange; 1206. Outlet flange; 1207. Second bolt; 1208. Second flat gasket;

[0063] 1301, Air inlet assembly; 1302, Third bolt. Detailed Implementation

[0064] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings and specific embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0065] In the description of this invention, it should be understood that the terms "upper," "lower," "left," "right," "top," "bottom," "front," "rear," "left," and "right," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," "third," "fourth," and "fifth," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated.

[0066] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0067] See Figure 1-14 This embodiment provides a high-speed, heavy-duty, horizontally split-type double-suction centrifugal fan, including a volute component 1, a rotor component 2, a non-shaft extension end self-centering bearing component 3, a shaft extension end self-centering bearing component 4, a two-end supported bearing component self-centering integral support 5, an integral base frame 6, and a motor 7.

[0068] The volute component 1 is mounted on the self-centering integral support 5 of the two-end supported bearing component;

[0069] The rotor component 2 is installed inside the volute component 1, and both ends extend to the outside of the volute component 1 and are installed on the bearing component integral support 5 through the non-shaft extension end automatic centering bearing component 3 and the shaft extension end automatic centering bearing component 4.

[0070] Both the self-centering integral support 5 of the two-end supported bearing components and the motor 7 are mounted on the integral base frame 6, and the rotor component 2 is connected to the motor 7.

[0071] In this embodiment, the volute component 1 includes a lower volute, an upper volute, and an air inlet assembly 1301; the lower volute and the upper volute are connected by flanges to form a fan volute; the air inlet assembly 1301 is fitted onto the rotor component 2 and connected to the fan volute by a third bolt 1302.

[0072] By adopting a split design for the fan casing, the problem of the fan rotor components being unable to be extracted on-site during equipment maintenance can be fundamentally solved.

[0073] In this embodiment, the lower volute is composed of a lower volute rear cover plate 1101, a lower volute front cover plate 1102, and a lower volute flow channel housing 1104 between the lower volute rear cover plate 1101 and the lower volute front cover plate 1102.

[0074] The lower volute is symmetrically provided with support legs 1106 on the front and rear sides for stable support of the lower volute.

[0075] Both the rear cover plate 1101 and the front cover plate 1102 of the lower volute are machined with first lifting lugs for hoisting the lower volute as a whole.

[0076] The lower volute is symmetrically provided with first reinforcing ribs 1109 on the left and right sides to enhance the strength of the lower volute.

[0077] The top of the lower volute is provided with a first right-side center-part flange 1103 and a first left-side center-part flange 1105 for separating the center-parts of the fan volute.

[0078] The bottom of the lower volute is provided with a first precision-machined pad 1107 and a second precision-machined pad 1108 to ensure that the flatness tolerance of the lower volute meets the flatness grade 9 tolerance standard requirements.

[0079] The lower volute is provided with a first bolt 1110 and a first flat washer 1111, which are used to fix the lower volute as a whole on the automatic centering integral support 5 of the bearing components supported at both ends;

[0080] The lower volute is provided with a first conical pin 1112, which is used to limit the lower volute to the automatic centering integral support 5 of the bearing components supported at both ends.

[0081] In this embodiment, the upper volute is composed of an upper volute rear cover plate 1201, an upper volute front cover plate 1202, and an upper volute flow channel housing 1204 between the upper volute rear cover plate 1201 and the upper volute front cover plate 1202.

[0082] The upper volute rear cover plate 1201 and the upper volute front cover plate 1202 are both machined with second lifting lugs for hoisting the upper volute as a whole.

[0083] The bottom of the upper volute is provided with a second right-side center-part flange 1203 and a second left-side center-part flange 1205 for separating the center-parts of the fan volute.

[0084] An outlet flange 1206 is provided on the side of the upper volute for connecting the outlet duct.

[0085] The upper volute is provided with a second bolt 1207 and a second flat washer 1208, which are used to connect the second right-side center flange 1203 of the upper volute to the first right-side center flange 1103 of the lower volute, and the second left-side center flange 1205 of the upper volute to the first left-side center flange 1105 of the lower volute, thereby connecting the upper volute and the lower volute together.

[0086] In this embodiment, the rotor component 2 includes an impeller 201, a shaft 202, and a coupling 203; the output shaft of the motor 7 is connected to the shaft 202 through the coupling 203, driving the shaft 202 to rotate; the coupling 203 and the shaft 202 are engaged through a tapered hole; the shaft 202 is connected to the impeller 201 through a key, transmitting torque to the impeller 201.

[0087] In this embodiment, the non-shaft extension end automatic centering bearing component 3 is a convenient core-pulling type, belonging to the fixed end of the rotor component 2, including a first outer bearing cover 301, a first bearing chamber 302, a first grease nipple 303, a fourth bolt 304, a first inner upper half bearing cover 305, a bearing sleeve adjusting ring 306, a first felt ring 307, a first inner lower half bearing cover 308, a first bearing sleeve 309, a first rolling bearing 310, a first bearing spacer ring 311, a fifth bolt 312, a third flat washer 313, a first bearing sleeve pressure ring 314, a first round nut 315, a first round nut locking washer 316, a sixth bolt 317, and a second tapered pin 318;

[0088] The first outer bearing cover 301 has a round structure; the round flange end face of the first outer bearing cover 301 has through holes uniformly machined for installing the fourth bolt 304; the round flange end face of the first outer bearing cover 301 has threaded holes uniformly machined for installing set screws; the inner side of the first outer bearing cover 301 has a round boss machined for axial positioning of the outer side of the first rolling bearing 310.

[0089] The first inner bearing cover is of the split type, consisting of the upper inner bearing cover 305 and the lower inner bearing cover 308 connected by the sixth bolt 317; the first felt ring 307 is inside the first inner bearing cover.

[0090] The upper inner half of the bearing cover 305 and the lower inner half of the bearing cover 308 have through holes uniformly machined on their semi-circular flange end faces for installing the fourth bolt 304; the lower inner half of the bearing cover 308 has a semi-circular boss machined on its inner side for positioning in conjunction with the arc of the first bearing chamber 302.

[0091] The first bearing housing 302 is an integral cylindrical structure with a semi-circular flange at the bottom. A threaded through hole is machined on the top of the first bearing housing 302 for installing the first grease nipple 303. A round boss is machined at the central through hole of the first bearing housing 302 for axial positioning of the inner side of the first rolling bearing 310. Threaded holes are uniformly machined on the circular planes at both ends of the first bearing housing 302 for installing the fourth bolt 304.

[0092] The lower semi-circular flange end face of the first bearing housing 302 has uniformly machined through holes for installing the fifth bolt 312; the fifth bolt 312 is fitted with a third flat washer 313; the lower semi-circular flange end face of the first bearing housing 302 has uniformly machined tapered holes for installing the second tapered pin 318; the lower semi-circular flange end face of the first bearing housing 302 has uniformly machined threaded holes for installing set screws;

[0093] The bearing sleeve adjusting ring 306 is a full circle structure, which is sleeved on the shaft 202. Its end face is in contact with the end face of the shaft 202 and the end face of the first bearing sleeve 309. It is used to adjust the axial position of the rotor component 2 by adjusting the thickness of the bearing sleeve adjusting ring 306.

[0094] The first bearing sleeve 309 is a double-sided symmetrical L-shaped bushing; a keyway is machined in the inner hole of the first bearing sleeve 309 for transmitting torque through the key and the shaft 202; the first rolling bearing 310 is interference-fitted onto the first bearing sleeve 309; the first bearing spacer 311 separates the first rolling bearing 310 to facilitate the addition of grease through the first grease nipple 303; the first bearing sleeve retaining ring 314, the first round nut 315 and the first round nut locking washer 316 are used to fix the first bearing sleeve 309 onto the shaft 202.

[0095] In this embodiment, the automatic centering bearing component 4 at the shaft extension end is a convenient core-pulling type, belonging to the floating end of the rotor component 2, and includes a second felt ring 401, a second inner upper half bearing cover 402, a second rolling bearing 403, a second grease nipple 404, a second bearing chamber 405, a seventh bolt 406, an outer upper half bearing cover 407, a third felt ring 408, an outer lower half bearing cover 409, a second round nut 410, a second round nut locking washer 411, a second bearing sleeve pressure ring 412, an eighth bolt 413, a fourth flat washer 414, a second bearing spacer ring 415, a second bearing sleeve 416, a second inner lower half bearing cover 417, a ninth bolt 418, and a third tapered pin 419;

[0096] The second inner bearing cover is of the split type, consisting of the upper inner bearing cover 402 and the lower inner bearing cover 417; the second felt ring 401 is inside the inner bearing cover.

[0097] The upper inner half of the bearing cover 402 and the lower inner half of the bearing cover 417 each have through holes uniformly machined on their semi-circular flange end faces for installing the seventh bolt 406; a semi-circular boss is machined on the inner side of the lower inner half of the bearing cover 417 for positioning in a circular arc fit with the second bearing chamber 405.

[0098] The second outer bearing cover is a split type, consisting of an upper outer bearing cover 407 and a lower outer bearing cover 409 connected by a ninth bolt 418; the third felt ring 408 is inside the second outer bearing cover; the upper outer bearing cover 407 and the lower outer bearing cover 409 each have through holes uniformly machined on their semi-circular flange end faces for installing the seventh bolt 406; the lower outer bearing cover 409 has a semi-circular boss machined on its inner side for positioning in a circular arc fit with the second bearing chamber 405.

[0099] The second bearing housing 405 is an integral cylindrical structure with a semi-circular flange at the bottom. A threaded through hole is machined at the top of the second bearing housing 405 for installing the second grease nipple 404. Threaded holes are uniformly machined on the circular planes at both ends of the second bearing housing 405 for installing the seventh bolt 406. Through holes are uniformly machined on the plane of the lower semi-circular flange of the second bearing housing 405 for installing the eighth bolt 413. A fourth flat washer 414 is fitted onto the eighth bolt 413. Threaded holes are uniformly machined on the end face of the lower semi-circular flange of the second bearing housing 405 for installing set screws. Conical holes are uniformly machined on the end face of the lower semi-circular flange of the second bearing housing 405 for installing the third tapered pin 419.

[0100] The second bearing sleeve 416 is a double-sided symmetrical L-shaped sleeve; a keyway is machined in the inner hole of the second bearing sleeve 416 for transmitting torque through the key and the shaft 202; the second rolling bearing 403 is interference-fitted onto the second bearing sleeve 416; the second bearing spacer 415 separates the second rolling bearing 403 to facilitate the addition of grease through the second grease nipple 404; the second bearing sleeve retaining ring 412, the second round nut 410, and the second round nut locking washer 411 are used to fix the second bearing sleeve 416 onto the shaft 202.

[0101] In one specific embodiment, the self-centering integral support 5 for the two-end supported bearing components includes a non-shaft extension bearing component self-centering support 501, a shaft extension bearing component self-centering support 502, an integral lower panel 506, and an integral upper panel 507; the integral upper panel 507 and the integral lower panel 506 are welded together by vertical stiffeners 508 and multiple second reinforcing stiffeners; the non-shaft extension bearing component self-centering support 501 and the shaft extension bearing component self-centering support 502 are welded to each other on the integral upper panel 507.

[0102] In this embodiment, the upper part of the automatic centering support 501 for the non-shaft extension bearing component is a semi-circular arc structure with a concentricity tolerance that meets the high-precision standard requirement of 0.005-0.02mm. It is used to closely cooperate with the overall cylindrical structure of the first bearing chamber 302 to achieve precise automatic centering of the arc of the automatic centering bearing component 3 for the non-shaft extension end.

[0103] The semi-circular flange end face of the automatic centering support 501 for the non-shaft extension bearing component is fitted and connected to the lower semi-circular flange end face of the first bearing chamber 302; threaded holes are uniformly machined on the semi-circular flange end face of the automatic centering support 501 for connection with the fifth bolt 312; tapered holes are uniformly machined on the semi-circular flange end face of the automatic centering support 501 for connection with the second tapered pin 318.

[0104] The automatic centering support component 501 of the non-shaft extension end bearing component has flow channels machined on its vertical surface and is reinforced with welded ribs.

[0105] In this embodiment, the upper part of the automatic centering support 502 of the shaft extension bearing component is a semi-circular arc structure with a concentricity tolerance that meets the high-precision standard requirement of 0.005-0.02mm. It is used to closely cooperate with the overall cylindrical structure of the second bearing chamber 405 to achieve precise automatic centering of the arc of the automatic centering bearing component 4 at the shaft extension end.

[0106] The semi-circular flange end face of the automatic centering support component 502 of the shaft extension bearing component is fitted and connected to the lower semi-circular flange end face of the second bearing chamber 405; threaded holes are uniformly machined on the semi-circular flange end face of the automatic centering support component 502 of the shaft extension bearing component for connection with the eighth bolt 413; tapered holes are uniformly machined on the semi-circular flange end face of the automatic centering support component 502 of the shaft extension bearing component for connection with the third tapered pin 419.

[0107] The automatic centering support component 502 of the shaft extension end bearing assembly has flow channels machined on its vertical surface and is reinforced with welded ribs.

[0108] In this embodiment, a third precision-machined pad 503 and a fourth precision-machined pad 504 are welded onto the overall upper panel 507; the flatness tolerance of the third precision-machined pad 503 and the fourth precision-machined pad 504 meets the flatness grade 9 tolerance standard requirements, thereby ensuring that the flatness tolerance of the volute component 1 meets the standard requirements.

[0109] A third lifting lug 509 is welded onto the upper panel 507 for lifting the automatic centering integral support 5 of the two-end supported bearing components;

[0110] A position adjustment screw device 510 is welded onto the upper panel 507 to adjust the front, back, left and right positions of the volute component 1.

[0111] The bottom of the overall lower panel 506 is welded with a fifth precision-machined pad 505. The flatness tolerance of the fifth precision-machined pad 505 meets the flatness grade 9 tolerance standard requirements, thereby ensuring that the flatness tolerance of the automatic centering overall support 5 of the two-end support bearing components meets the standard requirements.

[0112] In this embodiment, there are 8 position adjustment screw devices 510; 4 third lifting lugs 509; 4 third finishing pads 503; 2 fourth finishing pads 504; and 6 fifth finishing pads 505.

[0113] In this embodiment, the overall base frame 6 includes a wind turbine side overall base frame 601 and a motor side overall base frame 602; the self-centering overall support 5 of the two-end supported bearing components is installed on the wind turbine side overall base frame 601, and the motor 7 is installed on the motor side overall base frame 602.

[0114] The high-speed, heavy-duty, horizontally split-type double-suction centrifugal fan provided in this embodiment is assembled according to the following steps:

[0115] 1. Installation of the overall basic framework 6:

[0116] 1.1 Install the overall foundation frame 6 inside the factory building. The overall foundation frame 6 can be fixed by grouting or used with vibration isolators on other solid foundations, depending on the actual situation of the factory building.

[0117] 2. Installation of the self-centering integral support 5 for the two-end supported bearing components:

[0118] 2.1 Weld the vertical stiffener 508 and multiple second stiffeners to the overall lower panel 506;

[0119] 2.2 Weld the six fifth precision-machined pads 505 to the overall lower panel 506;

[0120] 2.3 Weld the overall upper panel 507 to the vertical stiffener 508 and multiple second reinforcing stiffeners;

[0121] 2.4 Weld the automatic centering support 501 of the non-shaft extension end bearing component to the overall upper panel 507;

[0122] 2.5. Weld the automatic centering support 502 of the shaft extension end bearing component to the overall upper panel 507.

[0123] 2.6 Weld the four third-finished pads 503 to the overall upper panel 507;

[0124] 2.7 Weld the two fourth precision-machined pads 504 to the overall upper panel 507;

[0125] 2.8 Weld the four third lifting lugs 509 to the overall upper panel 507;

[0126] 2.9 Weld the 8-position adjusting screw device 510 to the overall upper panel 507;

[0127] 2.10. Ensure that the flatness tolerance of the six fifth precision-machined pads 505, which are welded to the overall lower panel 506, meets the standard requirements through machining.

[0128] 2.11. Through machining, ensure that the flatness tolerance of the four third precision-machined pads 503 and two fourth precision-machined pads 504, which are welded to the overall upper panel 507, meets the standard requirements; and the parallelism tolerance of the four third precision-machined pads 503, two fourth precision-machined pads 504, and six fifth precision-machined pads 505 must also be controlled to meet the flatness grade 9 tolerance standard requirements.

[0129] 2.12. Ensure that the perpendicularity between the semi-circular flange end face of the automatic centering support 501 of the non-shaft extension bearing component and the six fifth precision-machined pads 505 meets the H-level standard requirements through machining.

[0130] 2.13. Ensure that the perpendicularity of the semi-circular flange end face of the automatic centering support 502 of the shaft extension bearing component meets the H-level standard requirements through machining.

[0131] 2.14. Ensure that the concentricity of the upper semi-circular arc structure of the automatic centering support 501 for the non-shaft extension bearing component and the automatic centering support 502 for the shaft extension bearing component meets the high-precision standard requirement of 0.005-0.02mm through machining;

[0132] 2.15. Install the assembled two-end supported bearing component automatic centering integral support 5 on the wind turbine side integral foundation frame 601, and tighten it with bolts and limit it with cylindrical pins;

[0133] 3. Installation of volute assembly 1 and rotor assembly 2:

[0134] 3.1 The lower volute is connected to the self-centering integral support 5 of the two-end support bearing components by the first bolt 1110 and the first flat washer 1111, and is limited on the self-centering integral support 5 of the two-end support bearing components by the first tapered pin 1112.

[0135] 3.1. Fit the air inlet assembly 1301 onto the rotor assembly 2;

[0136] 3.2. Install rotor assembly 2 into the lower volute;

[0137] 3.3 Connect the upper volute to the lower volute using the second bolt 1207 and the second flat washer 1208;

[0138] 3.4 Connect the air inlet assembly 1301 to the lower volute and the upper volute using the third bolt 1302;

[0139] 4. Installation of the automatic centering bearing component 4 at the shaft extension end:

[0140] 4.1 The second bearing chamber 405 is installed on the automatic centering support 502 of the bearing component at the shaft extension end, and the overall cylindrical structure of the second bearing chamber 405 is closely matched with the semi-circular arc structure on the automatic centering support 502 of the bearing component at the shaft extension end, so as to achieve precise automatic centering of the arc of the automatic centering bearing component 4 at the shaft extension end.

[0141] 4.2. Fit the lower semi-circular flange end face of the second bearing chamber 405 with the semi-circular flange end face on the automatic centering support 502 of the shaft extension bearing component;

[0142] 4.3 Install the fourth flat washer 414 on the eighth bolt 413, and pass the eighth bolt 413 with the fourth flat washer 414 through the through hole on the lower semi-circular flange end face of the second bearing chamber 405, and connect it with the threaded hole on the semi-circular flange end face of the automatic centering support 502 of the shaft extension bearing component.

[0143] 4.4. Pass the third tapered pin 419 through the tapered hole on the lower semi-circular flange end face of the second bearing chamber 405 and connect it with the tapered hole on the semi-circular flange end face of the automatic centering support 502 of the shaft extension bearing component.

[0144] 4.5 Connect the second grease fitting 404 to the second bearing housing 405 via threads;

[0145] 4.6 Heat and install the inner second rolling bearing 403 onto the second bearing sleeve 416, and make the inner ring end face of the inner second rolling bearing 403 fit against the boss end face of the second bearing sleeve 416.

[0146] 4.7 Install the second bearing spacer 415 on the second bearing sleeve 416, and make the end face of the second bearing spacer 415 fit against the end face of the inner ring of the inner second rolling bearing 403.

[0147] 4.8 Heat and install the outer second rolling bearing 403 onto the second bearing sleeve 416, and make the inner ring end face of the outer second rolling bearing 403 fit against the end face of the second bearing spacer 415;

[0148] 4.9. Add appropriate grease to the two second rolling bearings 403;

[0149] 4.10. Insert the key into the keyway on shaft 202;

[0150] 4.11. Install the second bearing sleeve 416, after assembling the second rolling bearing 403, onto the shaft 202, so that the key mates with the keyway in the inner hole of the second bearing sleeve 416, and the end face of the second bearing sleeve 416 fits against the end face of the shaft 202.

[0151] 4.12. Install the second bearing sleeve pressure ring 412 onto the shaft 202, so that the end face of the second bearing sleeve pressure ring 412 is in contact with the end face of the inner ring of the outer second rolling bearing 403;

[0152] 4.13. Install the second round nut 410 and the second round nut locking washer 411 onto the shaft 202 and lock them to prevent loosening;

[0153] 4.14. Insert the second felt ring 401 into the second inner lower half of the bearing cap 417;

[0154] 4.15. Install the second inner lower half bearing cover 417 on the second bearing chamber 405, so that the semi-circular boss of the second inner lower half bearing cover 417 mates with the inner hole of the second bearing chamber 405, and use the seventh bolt 406 to connect the second inner lower half bearing cover 417 to the second bearing chamber 405.

[0155] 4.16. Insert the second felt ring 401 into the second inner upper half of the bearing cover 402;

[0156] 4.17 Install the second inner upper half bearing cover 402 on the second bearing chamber 405, use the ninth bolt 418 to connect the second inner upper half bearing cover 402 and the second inner lower half bearing cover 417 into one piece, and use the seventh bolt 406 to connect the second inner upper half bearing cover 402 to the second bearing chamber 405.

[0157] 4.18. Insert the third felt ring 408 into the outer lower half of the bearing cap 409;

[0158] 4.19. Install the lower outer bearing cover 409 onto the second bearing chamber 405, so that the semi-circular boss of the lower outer bearing cover 409 mates with the inner hole of the second bearing chamber 405, and use the seventh bolt 406 to connect the lower outer bearing cover 409 to the second bearing chamber 405.

[0159] 4.20. Insert the third felt ring 408 into the outer upper half of the bearing cap 407;

[0160] 4.21. Install the outer upper half bearing cover 407 onto the second bearing chamber 405. Use bolt nine 418 to connect the outer upper half bearing cover 407 and the outer lower half bearing cover 409 into one piece. Use bolt seven 406 to connect the outer upper half bearing cover 407 to the bearing chamber 405.

[0161] 5. Installation of the non-shaft extension end self-centering bearing component 3:

[0162] 5.1 The first bearing chamber 302 is installed on the automatic centering support 501 of the non-shaft extension bearing component, and the overall cylindrical structure of the first bearing chamber 302 is closely matched with the semi-circular arc structure on the upper part of the automatic centering support 501 of the non-shaft extension bearing component to achieve precise automatic centering of the arc of the automatic centering bearing component 3 of the non-shaft extension bearing component.

[0163] 5.2. Fit the lower semi-circular flange end face of the first bearing chamber 302 with the semi-circular flange end face on the automatic centering support 501 of the non-shaft extension bearing component;

[0164] 5.3 Install the third flat washer 313 on the fifth bolt 312, and pass the fifth bolt 312 with the third flat washer 313 through the through hole on the lower semi-circular flange end face of the first bearing chamber 302, and connect it with the threaded hole on the semi-circular flange end face of the automatic centering support 501 of the non-shaft extension bearing component.

[0165] 5.4. Pass the second tapered pin 318 through the tapered hole on the lower semi-circular flange end face of the first bearing chamber 302 and connect it with the tapered hole on the semi-circular flange end face of the automatic centering support 501 of the non-shaft extension bearing component.

[0166] 5.5 Connect the first grease fitting 303 to the first bearing housing 302 via threads;

[0167] 5.6. Heat and install the inner first rolling bearing 310 onto the first bearing sleeve 309, and make the inner ring end face of the inner first rolling bearing 310 fit against the boss end face of the first bearing sleeve 309.

[0168] 5.7 Install the first bearing spacer 311 on the first bearing sleeve 309, and make the end face of the first bearing spacer 311 fit against the end face of the inner ring of the inner first rolling bearing 310.

[0169] 5.8 Heat and install the outer first rolling bearing 310 onto the first bearing sleeve 309, and make the inner ring end face of the outer first rolling bearing 310 fit against the end face of the first bearing spacer 311;

[0170] 5.9. Apply appropriate grease to the two first rolling bearings 310;

[0171] 5.10. Install the bearing sleeve adjusting ring 306 onto the shaft 202, and make the end face of the bearing sleeve adjusting ring 306 fit against the end face of the shaft 202;

[0172] 5.11. Insert the key into the keyway on shaft 202;

[0173] 5.12. Install the first bearing sleeve 309, after assembling the first rolling bearing 310, onto the shaft 202, so that the key mates with the keyway in the inner hole of the first bearing sleeve 309, and the end face of the first bearing sleeve 309 fits against the end face of the bearing sleeve adjusting ring 306.

[0174] 5.13. Install the first bearing sleeve pressure ring 314 onto the shaft 202, so that the end face of the first bearing sleeve pressure ring 314 fits against the end face of the inner ring of the outer first rolling bearing 310;

[0175] 5.14. Install the first round nut 315 and the first round nut locking washer 316 onto the shaft 202 and lock them to prevent loosening;

[0176] 5.15. Insert the first felt ring 307 into the first inner lower half of the bearing cap 308;

[0177] 5.16. Install the first inner lower half bearing cover 308 on the first bearing chamber 302, so that the semi-circular boss of the first inner lower half bearing cover 308 mates with the inner hole of the first bearing chamber 302, and use the fourth bolt 304 to connect the first inner lower half bearing cover 308 to the first bearing chamber 302.

[0178] 5.17. Insert the first felt ring 307 into the first inner upper half of the bearing cap 305;

[0179] 5.18. Install the first inner upper half bearing cover 305 on the first bearing chamber 302, use the sixth bolt 317 to connect the first inner upper half bearing cover 305 and the first inner lower half bearing cover 308 into one piece, and use the fourth bolt 304 to connect the first inner upper half bearing cover 305 to the first bearing chamber 302.

[0180] 5.19. Install the first outer bearing cover 301 onto the first bearing chamber 302, adjust the thermal expansion gap to the qualified range using the first outer bearing cover 301, and connect the first outer bearing cover 301 to the first bearing chamber 302 using the fourth bolt 304.

[0181] 6. Installation of motor 7:

[0182] 6.1 Install the motor 7 on the overall base frame 602 on the motor side;

[0183] 6.2 Connect the rotor assembly 2 and the motor 7 using a coupling.

[0184] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

Claims

1. A high-speed, heavy-duty, horizontally split-type double-suction centrifugal fan, characterized in that, It includes a volute assembly (1), a rotor assembly (2), a non-shaft extension end self-centering bearing assembly (3), a shaft extension end self-centering bearing assembly (4), an end-supported bearing assembly self-centering integral support (5), an integral base frame (6), and a motor (7); The volute component (1) is mounted on the self-centering integral support (5) of the two-end supported bearing component; The rotor component (2) is installed inside the volute component (1), and both ends extend to the outside of the volute component (1) and are installed on the bearing component integral support (5) through the non-shaft extension end automatic centering bearing component (3) and the shaft extension end automatic centering bearing component (4); The self-centering integral support (5) of the two-end supported bearing components and the motor (7) are both installed on the integral base frame (6), and the rotor component (2) is connected to the motor (7).

2. The high-speed, heavy-duty, horizontally split-type double-suction centrifugal fan according to claim 1, characterized in that, The rotor component (2) includes an impeller (201), a shaft (202), and a coupling (203); the output shaft of the motor (7) is connected to the shaft (202) through the coupling (203) to drive the shaft (202) to rotate; the coupling (203) and the shaft (202) are fitted through a tapered hole; the shaft (202) is connected to the impeller (201) through a key to transmit torque to the impeller (201).

3. The high-speed, heavy-duty, horizontally split-type double-suction centrifugal fan according to claim 1, characterized in that, The non-shaft extension end automatic centering bearing component (3) is a convenient core-pulling type, including a first outer bearing cover (301), a first bearing chamber (302), a first grease nipple (303), a fourth bolt (304), a first inner upper half bearing cover (305), a bearing sleeve adjusting ring (306), a first felt ring (307), a first inner lower half bearing cover (308), a first bearing sleeve (309), a first rolling bearing (310), a first bearing spacer (311), a fifth bolt (312), a third flat washer (313), a first bearing sleeve retaining ring (314), a first round nut (315), a first round nut locking washer (316), a sixth bolt (317), and a second round tapered pin (318); The first outer bearing cap (301) has a circular structure; through holes are uniformly machined on the circular flange end face of the first outer bearing cap (301) for installing the fourth bolt (304); threaded holes are uniformly machined on the circular flange end face of the first outer bearing cap (301) for installing set screws; a circular boss is machined on the inner side of the first outer bearing cap (301) for axial positioning of the outer side of the first rolling bearing (310); The first inner bearing cover is a split type, consisting of the first inner upper half bearing cover (305) and the first inner lower half bearing cover (308) connected by the sixth bolt (317); the first felt ring (307) is inside the first inner bearing cover; The upper inner half of the bearing cap (305) and the lower inner half of the bearing cap (308) have through holes uniformly machined on their semi-circular flange end faces for installing the fourth bolt (304); the lower inner half of the bearing cap (308) has a semi-circular boss machined on its inner side for positioning in conjunction with the arc of the first bearing chamber (302). The first bearing housing (302) is an integral cylindrical structure with a semi-circular flange at the bottom; the top of the first bearing housing (302) is machined with a threaded through hole for installing the first grease nipple (303); a round boss is machined at the central through hole of the first bearing housing (302) for axial positioning of the inner side of the first rolling bearing (310); threaded holes are uniformly machined on the circular planes at both ends of the first bearing housing (302) for installing the fourth bolt (304); The lower semi-circular flange end face of the first bearing housing (302) has uniformly machined through holes for installing the fifth bolt (312); the fifth bolt (312) is fitted with a third flat washer (313); the lower semi-circular flange end face of the first bearing housing (302) has uniformly machined conical holes for installing the second conical pin (318); the lower semi-circular flange end face of the first bearing housing (302) has uniformly machined threaded holes for installing set screws; The bearing sleeve adjusting ring (306) is a round structure, which is sleeved on the shaft (202). Its end face is in contact with the end face of the shaft (202) and the end face of the first bearing sleeve (309). It is used to adjust the axial position of the rotor component (2) by adjusting the thickness of the bearing sleeve adjusting ring (306). The first bearing sleeve (309) is a double-sided symmetrical L-shaped bushing; a keyway is machined in the inner hole of the first bearing sleeve (309) for transmitting torque through the key and the shaft (202); the first rolling bearing (310) is interference-fitted onto the first bearing sleeve (309); the first bearing spacer (311) separates the first rolling bearing (310) to facilitate the addition of grease through the first grease nipple (303); the first bearing sleeve retaining ring (314), the first round nut (315) and the first round nut locking washer (316) are used to fix the first bearing sleeve (309) onto the shaft (202).

4. The high-speed, heavy-duty, horizontally split-type double-suction centrifugal fan according to claim 1, characterized in that, The automatic centering bearing component (4) at the shaft extension end is a convenient pull-out type, including a second felt ring (401), a second inner upper half bearing cover (402), a second rolling bearing (403), a second grease nipple (404), a second bearing chamber (405), a seventh bolt (406), an outer upper half bearing cover (407), a third felt ring (408), an outer lower half bearing cover (409), a second round nut (410), a second round nut locking washer (411), a second bearing sleeve retaining ring (412), an eighth bolt (413), a fourth flat washer (414), a second bearing spacer (415), a second bearing sleeve (416), a second inner lower half bearing cover (417), a ninth bolt (418), and a third tapered pin (419). The second inner bearing cover is of the split type, consisting of the upper part of the second inner bearing cover (402) and the lower part of the second inner bearing cover (417); the second felt ring (401) is inside the inner bearing cover; The upper inner half of the bearing cover (402) and the lower inner half of the bearing cover (417) each have through holes uniformly machined on their semi-circular flange end faces for installing the seventh bolt (406); a semi-circular boss is machined on the inner side of the lower inner half of the bearing cover (417) for positioning in a circular arc fit with the second bearing chamber (405). The second outer bearing cover is a split type, consisting of an upper outer bearing cover (407) and a lower outer bearing cover (409) connected by a ninth bolt (418); the third felt ring (408) is inside the second outer bearing cover; the upper outer bearing cover (407) and the lower outer bearing cover (409) each have through holes uniformly machined on their semi-circular flange end faces for installing the seventh bolt (406); the lower outer bearing cover (409) has a semi-circular boss machined on its inner side for positioning in a circular arc fit with the second bearing chamber (405); The second bearing housing (405) is an integral cylindrical structure with a semi-circular flange at the bottom. A threaded through hole is machined on the top of the second bearing housing (405) for installing the second grease nipple (404). Threaded holes are uniformly machined on the circular planes at both ends of the second bearing housing (405) for installing the seventh bolt (406). Through holes are uniformly machined on the plane of the semi-circular flange at the bottom of the second bearing housing (405) for installing the eighth bolt (413). A fourth flat washer (414) is fitted on the eighth bolt (413). Threaded holes are uniformly machined on the end face of the semi-circular flange at the bottom of the second bearing housing (405) for installing set screws. Conical holes are uniformly machined on the end face of the semi-circular flange at the bottom of the second bearing housing (405) for installing the third conical pin (419). The second bearing sleeve (416) is a double-sided symmetrical L-shaped bushing; a keyway is machined in the inner hole of the second bearing sleeve (416) for transmitting torque through the key and the shaft (202); the second rolling bearing (403) is interference-fitted onto the second bearing sleeve (416); the second bearing spacer (415) separates the second rolling bearing (403) to facilitate the addition of grease through the second grease nipple (404); the second bearing sleeve retaining ring (412), the second round nut (410), and the second round nut locking washer (411) are used to fix the second bearing sleeve (416) onto the shaft (202).

5. The high-speed, heavy-duty, horizontally split-type double-suction centrifugal fan according to claim 3 or 4, characterized in that, The self-centering integral support (5) for bearing components with two-end support includes a self-centering support for bearing components at the non-shaft extension end (501), a self-centering support for bearing components at the shaft extension end (502), an integral lower panel (506), and an integral upper panel (507). The overall upper panel (507) and the overall lower panel (506) are welded together by vertical stiffeners (508) and multiple second stiffeners; The automatic centering support (501) for the non-shaft extension bearing component and the automatic centering support (502) for the shaft extension bearing component are welded to the overall upper panel (507).

6. The high-speed, heavy-duty, horizontally split-type double-suction centrifugal fan according to claim 5, characterized in that, The upper part of the automatic centering support (501) for the non-shaft extension bearing component is a semi-circular arc structure, which is used to closely cooperate with the overall cylindrical structure of the first bearing chamber (302) to realize the automatic arc centering of the non-shaft extension bearing component (3). The semi-circular flange end face of the automatic centering support (501) of the non-shaft extension bearing component is fitted and connected to the lower semi-circular flange end face of the first bearing chamber (302); The semi-circular flange end face of the non-shaft extension bearing component automatic centering support (501) has threaded holes uniformly machined for connection with the fifth bolt (312); The semi-circular flange end face of the non-shaft extension bearing component automatic centering support (501) is uniformly machined with conical holes for connection with the second conical pin (318); The automatic centering support component (501) of the non-shaft extension end bearing component has flow channels machined on its vertical surface and is welded with reinforcing ribs.

7. The high-speed, heavy-duty, horizontally split-type double-suction centrifugal fan according to claim 5, characterized in that, The upper part of the automatic centering support (502) of the shaft extension bearing component is a semi-circular arc structure, which is used to closely cooperate with the overall cylindrical structure of the second bearing chamber (405) to realize the automatic centering of the arc of the automatic centering bearing component (4) at the shaft extension end; The semi-circular flange end face of the automatic centering support component (502) of the shaft extension bearing assembly is fitted and connected to the lower semi-circular flange end face of the second bearing chamber (405); The automatic centering support (502) of the shaft extension bearing component has threaded holes uniformly machined on the semi-circular flange end face for connection with the eighth bolt (413); The automatic centering support (502) of the shaft extension bearing component has a tapered hole uniformly machined on the semi-circular flange end face for connection with the third tapered pin (419); The automatic centering support component (502) of the shaft extension end bearing component has flow channels machined on its vertical surface and is welded with reinforcing ribs.

8. The high-speed, heavy-duty, horizontally split-type double-suction centrifugal fan according to claim 5, characterized in that, The upper panel (507) is welded with a third precision-machined pad (503) and a fourth precision-machined pad (504); the lower panel (506) is welded with a fifth precision-machined pad (505) at the bottom.

9. The high-speed, heavy-duty, horizontally split-type double-suction centrifugal fan according to claim 5, characterized in that, A third lifting lug (509) is welded onto the upper panel (507) for hoisting the automatic centering integral support (5) of the bearing components supported at both ends.

10. The high-speed, heavy-duty, horizontally split-type double-suction centrifugal fan according to claim 5, characterized in that, A position adjustment screw device (510) is welded on the upper panel (507) to adjust the front, back, left and right positions of the volute component (1).

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