CN114688071B - Integral bearing box for fan and disassembling method thereof - Google Patents
Integral bearing box for fan and disassembling method thereof Download PDFInfo
- Publication number
- CN114688071B CN114688071B CN202210395328.2A CN202210395328A CN114688071B CN 114688071 B CN114688071 B CN 114688071B CN 202210395328 A CN202210395328 A CN 202210395328A CN 114688071 B CN114688071 B CN 114688071B
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- bearing
- fan
- inner sleeve
- fixed end
- shell
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- 238000000034 method Methods 0.000 title claims abstract description 16
- 210000004907 gland Anatomy 0.000 claims abstract description 41
- 230000007704 transition Effects 0.000 claims abstract description 12
- 230000000149 penetrating effect Effects 0.000 claims abstract description 4
- 238000007789 sealing Methods 0.000 claims description 15
- 238000003825 pressing Methods 0.000 claims description 4
- 238000005266 casting Methods 0.000 abstract description 5
- 238000013461 design Methods 0.000 abstract description 3
- 238000012545 processing Methods 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/05—Shafts or bearings, or assemblies thereof, specially adapted for elastic fluid pumps
- F04D29/056—Bearings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/08—Sealings
- F04D29/083—Sealings especially adapted for elastic fluid pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/60—Mounting; Assembling; Disassembling
- F04D29/601—Mounting; Assembling; Disassembling specially adapted for elastic fluid pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2240/00—Components
- F05D2240/50—Bearings
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Mounting Of Bearings Or Others (AREA)
Abstract
The application discloses an integral bearing box for a fan and a disassembly method thereof, and relates to the field of bearing boxes; the integral bearing box comprises a gland, a shell and a bearing; a fan shaft is arranged in the integral bearing box in a penetrating way; one end of the fan shaft penetrates through the integral bearing box to be connected with the fan unit, and the other end of the fan shaft is connected with the fan unit; the bearing comprises a floating end bearing and a fixed end bearing, and a bearing box inner sleeve is arranged between the fixed end bearing and the inner cavity surface of the shell; the integral bearing box for the fan adopts the conventional integral casting design, has low integral casting and processing cost, and can be directly disassembled together with the fan shaft and the fixed end bearing in the bearing disassembling process by adopting the structural design that the outer wall surface of the bearing box inner sleeve is in clearance fit with the shell and the inner wall surface of the bearing box inner sleeve is in transition fit with the fixed end bearing, so that the fixed end bearing is prevented from being damaged.
Description
Technical Field
The application relates to the field of bearing boxes, in particular to an integral bearing box for a fan and a disassembly method thereof.
Background
The ventilator is a common gas conveying device, has wide application in the field of gas conveying in industrial production, one end of a fan shaft of the ventilator is connected with a motor unit, the other end of the fan shaft of the ventilator is connected with the fan unit, and the motor rotates to drive the shaft to rotate with the impeller, so that gas enters from a fan inlet and is discharged from a fan outlet through an impeller runner, and the conveying process is completed.
The fan shaft of the ventilator is usually provided with a bearing box, two-disc bearings are arranged in the bearing box, the fan shaft can generate thermal expansion in the high-speed rotation process of the fan, the bearing box is provided with a movable end and a fixed end in order to prevent the fan from malfunctioning due to the thermal expansion of the fan shaft, the bearing close to one side of the impeller is called a movable end bearing, and the bearing close to one side of the motor is called a fixed end bearing.
The bearing box of the ventilator is provided with an integral bearing box and a split bearing box; the cavity that integral bearing box held the bearing is an integer, and casting and processing cost are low, but in fan operation, if bearing temperature rise is too high or there is abnormal sound in the bearing box, if want to see whether the bearing breaks down, because the existence of stiff end bearing boss, can only pound the main shaft with the hammer from the stiff end, let main shaft and the end bearing that moves about follow bearing box move about the end and discharge, and the stiff end bearing remains in the bearing box, and reuse sleeve is discharged from the box to the stiff end bearing. However, in the process of smashing the fan shaft, the tolerance of the fan shaft is changed, bearing balls are easy to fall off, the fixed end bearing is easy to damage, the manufacturing process requirement of the split bearing box is high, the matching precision requirement between the upper bearing box and the lower bearing box is high, and the manufacturing cost is increased.
Content of the application
The application provides an integral bearing box for a fan and a disassembly method thereof, aiming at solving the technical problems that the fixed end bearing is easy to damage and the manufacturing and maintenance cost is high due to inconvenient disassembly and assembly of the fixed end bearing in the process of checking the fan bearing box fault.
On one hand, the technical problems of the application are realized by the following technical proposal:
an integral bearing box for a fan comprises a gland, a shell and a bearing; a fan shaft is arranged in the integral bearing box in a penetrating way; the gland, the shell, the bearing and the fan shaft are of a coaxial structure; one end of the fan shaft penetrates through the integral bearing box to be connected with the fan unit, and the other end of the fan shaft is connected with the fan unit;
the gland comprises a movable end gland and a fixed end gland; the movable end pressing cover is arranged on the end face of the shell close to the fan unit; the fixed end gland is arranged on the end face of the shell close to the motor unit;
the bearing comprises a moving end bearing and a fixed end bearing, wherein the moving end bearing is arranged in an inner cavity of the shell close to a moving end of the moving end gland, the fixed end bearing is arranged in an inner cavity of the shell close to one end of the fixed end gland, and a bearing box inner sleeve is arranged between the fixed end bearing and an inner cavity surface of the shell.
Preferably, the bearing housing inner sleeve comprises a first inner sleeve and a second inner sleeve, and the first inner sleeve and the second inner sleeve are of an integrated structure; the outer wall surfaces of the first inner sleeve and the second inner sleeve are of stepped shaft structures, the inner wall surfaces of the first inner sleeve and the second inner sleeve are of stepped hole structures, and a fixed end bearing is arranged in the inner wall surface of the second inner sleeve.
Preferably, the outer wall surface of the bearing housing inner sleeve is in clearance fit with the shell; the inner wall surface of the bearing housing inner sleeve is in transition fit with the fixed end bearing.
Preferably, a key slot is formed in the outer side wall between the second inner sleeve and the shell, and a key is arranged in the key slot.
Preferably, a screw hole is formed in the side wall of the second inner sleeve, a set screw is arranged in the screw hole, and the set screw penetrates through the key groove and is in threaded connection with the shell.
Preferably, a sealing ring is arranged at the step transition part of the outer wall surfaces of the first inner sleeve and the second inner sleeve; the sealing ring is attached to the transition part of the stepped hole in the inner cavity of the end part of the shell.
Preferably, a sealing gasket is further arranged between the end face, connected with the shell, of the fixed end gland.
Preferably, a stop washer, a round nut and an oil retainer are also arranged in the inner cavity of the gland between the fixed end bearing and the fixed end gland; the fixed end bearing, the stop washer, the round nut and the oil retainer are sequentially arranged on the fan shaft.
On the other hand, the application also provides a disassembling method of the integral bearing box for the fan, which comprises the following operation steps:
1) Firstly, dismantling a fan unit and a motor unit on two sides of a fan shaft; placing the integral bearing box with the fan shaft on a disassembly and assembly workbench;
2) Removing the floating end gland and the fixed end gland on two sides of the integral bearing box; sleeving a tool shaft sleeve along the shaft body of the fan shaft, so that the end face of the tool shaft sleeve is attached to the side face of the movable end bearing;
3) And (3) dismantling the set screw connected to the bearing box inner sleeve, and knocking the tool shaft sleeve to enable the bearing box inner sleeve, the fixed end bearing and the fan shaft to be dismantled together.
Preferably, the mounting position of the set screw on the bearing housing inner sleeve is above the fan shaft.
In summary, the application has the following beneficial effects:
1. the integral bearing box for the fan adopts the conventional integral casting design, the integral casting and processing cost is low, the stepped bearing box inner sleeve is arranged between the fixed end bearing and the shell, the outer wall surface of the bearing box inner sleeve is in clearance fit with the shell, and the inner wall surface of the bearing box inner sleeve is in transition fit with the fixed end bearing, so that the bearing box inner sleeve, the fan shaft and the fixed end bearing can be directly disassembled together in the bearing disassembling process, and the damage of the fixed end bearing is prevented.
2. The key slot arranged on the bearing box inner sleeve can prevent the bearing box inner sleeve from sliding with the shell in the circumferential direction in the working process, and the bearing box inner sleeve and the shell can be fixedly connected by the set screw to prevent the bearing box inner sleeve from sliding along the axial direction; meanwhile, the set screw and the key groove are arranged above the shaft of the fan, so that oil leakage of the bearing box can be avoided.
3. According to the application, the sealing ring is arranged at the step transition part of the bearing box inner sleeve and the shell, so that oil leakage between the bearing box inner sleeve and the inner cavity of the bearing box is prevented, and meanwhile, the sealing gasket arranged between the fixed end gland and the shell further prevents the oil leakage of the bearing box.
Drawings
FIG. 1 is a schematic view of an integral bearing housing and its connection overall structure;
FIG. 2 is a cross-sectional view of an integral bearing housing and its connection;
FIG. 3 is an enlarged schematic view of the structure at A;
FIG. 4 is a schematic view of the assembly and disassembly structure of the integral bearing housing;
fig. 5 is a cross-sectional view of a modified front fixed end bearing and its connection.
1. A gland; 101. a free end gland; 102. a fixed end gland; 2. a housing; 3. a bearing; 301. a free end bearing; 302. fixing an end bearing; 4. a fan shaft; 5. a fan group; 6. a motor group; 7. a bearing housing inner sleeve; 701. a first inner sleeve; 702. a second inner sleeve; 8. a key; 9. a set screw; 10. a seal ring; 11. a sealing gasket; 12. a stop washer; 13. a round nut; 14. oil slinger; 15. and (5) a tool shaft sleeve.
Detailed Description
In order that the above objects, features and advantages of the application will be more clearly understood, a further description of the application will be rendered by reference to the appended drawings and examples.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application, however, the present application may be practiced otherwise than as described herein, and therefore the present application is not limited to the specific embodiments of the disclosure that follow.
Example 1: as shown in fig. 1 and 2, a unitary bearing housing for a fan, the unitary bearing housing including a gland 1, a housing 2, and a bearing 3; a fan shaft 4 is arranged in the integral bearing box in a penetrating way; the gland 1, the shell 2, the bearing 3 and the fan shaft 4 are of a coaxial structure; one end of the fan shaft 4 penetrates through the integral bearing box to be connected with the fan set 5, an impeller is arranged in the fan set 5 for pneumatic transmission, and the other end of the fan shaft is connected with the motor set 6 through a coupler; providing power support for the fan shaft 4 to drive the impeller to rotate.
The gland 1 comprises a movable end gland 101 and a fixed end gland 102; the free end gland 101 is provided on a side end face of the housing 2 in a direction close to the fan group 5; i.e. the free end of the housing (2); the fixed end gland 102 is arranged on the side end face of the shell 2 close to the direction of the motor group 6; i.e. the fixed end of the housing (2).
The bearing 3 comprises a moving end bearing 301 and a fixed end bearing 302, wherein the moving end bearing 301 is arranged in an inner cavity of the moving end of the shell 2, the fixed end bearing 302 is arranged in an inner cavity of the fixed end of the shell 2, and the model and the size of the moving end bearing 301 are slightly larger than those of the fixed end bearing 302; a bearing housing inner sleeve 7 is provided between the outer circumferential surface of the fixed end bearing 302 and the inner cavity surface of the housing 2.
As shown in fig. 3, the bearing housing inner sleeve 7 includes a first inner sleeve 701 and a second inner sleeve 702, the diameter of the first inner sleeve 701 being smaller than the diameter of the second inner sleeve 702; the first inner sleeve 701 and the second inner sleeve 702 are of an integral structure; the outer wall surfaces of the first inner sleeve 701 and the second inner sleeve 702 are of a stepped shaft structure, and the stepped shaft structures of the first inner sleeve 701 and the second inner sleeve 702 are in clearance fit with the stepped hole structure of the inner cavity of the fixed end of the shell 2; the inner wall surfaces of the first inner sleeve 701 and the second inner sleeve 702 are of stepped hole structures, a fixed end bearing 302 is arranged in the inner wall surface of the second inner sleeve 702, and the outer circular surface of the fixed end bearing 302 and the inner cavity surface of the second inner sleeve 702 are in transition fit; a stop washer 12, a round nut 13 and an oil retainer 14 are also arranged in the gland inner cavity between the fixed end bearing 302 and the fixed end gland 102; the fixed end bearing 302, the stop washer 12, the round nut 13 and the oil retainer 14 are sequentially arranged on the fan shaft 4 along the axial direction; the round nut 13 is connected to the fan shaft 4 through threads correspondingly arranged on the fan shaft 4, so that the fixed end bearing 302 is locked and fixed on the fan shaft 4; the stop washer 12 can prevent the round nut 13 from loosening, so as to influence the work of the equipment; the oil retainer 14 can prevent the oil in the bearing box from leaking; a stop washer 12, a round nut 13 and a slinger 14 are also arranged in the gland cavity between the floating end bearing 301 and the floating end gland 101; the free end bearing 301 is consistent with the mounting structure of the fixed end bearing 302 in terms of relatively fixed free end bearing 301.
Example 2: as shown in fig. 3, a key groove is formed in the outer side wall between the second inner sleeve 702 and the housing 2, a key 8 is arranged in the key groove to prevent the bearing housing inner sleeve 7 from doing circular motion on the inner cavity surface of the housing 2, a screw hole is formed in the side wall of the second inner sleeve 702, a set screw 9 is arranged in the screw hole, the set screw 9 penetrates through the key groove and is in threaded connection with the key 8 to the housing 2, and the bearing housing inner sleeve 7 is prevented from sliding in the inner cavity of the housing 2 along the axial direction; a sealing ring 10 is arranged at the step transition part of the outer wall surfaces of the first inner sleeve 701 and the second inner sleeve 702; the sealing ring 10 adopts an O-shaped sealing ring, the sealing ring 10 is attached to the stepped hole transition part of the inner cavity of the fixed end of the shell 2 to prevent the oil leakage problem of the bearing box, and a sealing gasket 11 is further arranged between the fixed end gland 102 and the end face of the shell 2 to also play a role in sealing and preventing the oil leakage.
Example 3: as shown in fig. 4, this embodiment discloses a method for disassembling an integral bearing housing for a fan, which specifically includes the following steps:
1) Firstly, removing a fan set 5 and a motor set 6 which are connected to two sides of a fan shaft 4; placing the integral bearing box with the fan shaft 4 on a disassembly and assembly workbench;
2) Removing the floating end press covers 101 and the fixed end press covers 102 on two sides of the integral bearing box; the oil retainer 14, the round nut 13 and the stop washer 12 on the side of the floating end bearing 301 are removed in sequence; exposing the free end bearing 301, sleeving a tool shaft sleeve 15 along the shaft body of the fan shaft 4 at the side of the free end bearing 301, and enabling the end face of the tool 15 to be attached to the side face of the free end bearing 301; the side wall of the tool shaft sleeve 15 can be tightly attached to the inner ring and the outer ring of the moving end bearing 301, so that the moving end bearing 301 can be uniformly stressed when being subjected to thrust.
3) The set screw 9 connected to the bearing housing inner sleeve 7 is removed, wherein the installation position of the set screw 9 on the bearing housing inner sleeve 7 is above the fan shaft 4, so that the possibility of oil leakage of the bearing housing is avoided; the tool shaft sleeve 15 is knocked along the axial direction by a wood hammer and other tools, and the bearing housing inner sleeve 7 is in clearance fit with the inner cavity of the shell 2, so that the bearing housing inner sleeve 7, the fixed end bearing 302 and the fan shaft 4 are detached together, and the damage of the bearing caused by detachment can be avoided.
The present application is not limited to the above-mentioned embodiments, and any equivalent embodiments which can be changed or modified by the technical content disclosed above can be applied to other fields, but any simple modification and equivalent changes to the above-mentioned embodiments according to the technical substance of the present application are still within the protection scope of the technical solution of the present application.
Claims (8)
1. An integral bearing box for a fan is characterized in that: the integral bearing box comprises a gland (1), a shell (2) and a bearing (3); a fan shaft (4) is arranged in the integral bearing box in a penetrating way; the gland (1), the shell (2), the bearing (3) and the fan shaft (4) are of a coaxial structure; one end of the fan shaft (4) penetrates through the integral bearing box to be connected with the fan unit (5), and the other end of the fan shaft is connected with the motor unit (6);
the gland (1) comprises a movable end gland (101) and a fixed end gland (102); the movable end pressing cover (101) is arranged on the end face of the shell (2) close to the fan unit (5); the fixed end gland (102) is arranged on the end face of the shell (2) close to the motor unit (6);
the bearing (3) comprises a moving end bearing (301) and a fixed end bearing (302), the moving end bearing (301) is arranged in an inner cavity of the shell (2) close to one end of the moving end gland (101), the fixed end bearing (302) is arranged in an inner cavity of the shell (2) close to one end of the fixed end gland (102), and a bearing box inner sleeve (7) is arranged between the fixed end bearing (302) and an inner cavity surface of the shell (2);
the bearing box inner sleeve (7) comprises a first inner sleeve (701) and a second inner sleeve (702), and the first inner sleeve (701) and the second inner sleeve (702) are of an integrated structure; the outer wall surfaces of the first inner sleeve (701) and the second inner sleeve (702) are of a stepped shaft structure, the inner wall surfaces of the first inner sleeve (701) and the second inner sleeve (702) are of a stepped hole structure, and a fixed end bearing (302) is arranged in the inner wall surface of the second inner sleeve (702);
the outer wall surface of the bearing box inner sleeve (7) is in clearance fit with the shell (2); the inner wall surface of the bearing box inner sleeve (7) is in transition fit with the fixed end bearing (302).
2. The integrated bearing housing for a fan as claimed in claim 1, wherein: a key groove is formed in the outer side wall between the second inner sleeve (702) and the shell (2), and a key (8) is arranged in the key groove.
3. The integrated bearing housing for a fan as claimed in claim 2, wherein: screw holes are formed in the side walls of the second inner sleeve (702), set screws (9) are arranged in the screw holes, and the set screws (9) penetrate through the key grooves and are in threaded connection with the keys (8) to form a shell (2).
4. The integrated bearing housing for a fan as claimed in claim 1, wherein: a sealing ring (10) is arranged at the step transition part of the outer wall surfaces of the first inner sleeve (701) and the second inner sleeve (702); the sealing ring (10) is attached to the transition part of the stepped hole in the inner cavity of the end part of the shell (2).
5. The integrated bearing housing for a fan as claimed in claim 1, wherein: a sealing gasket (11) is further arranged between the end face, connected with the shell (2), of the fixed end gland (102).
6. The integrated bearing housing for a fan as claimed in claim 1, wherein: a stop washer (12), a round nut (13) and an oil retainer (14) are also arranged in a gland cavity between the fixed end bearing (302) and the fixed end gland (102); the fixed end bearing (302), the stop washer (12), the round nut (13) and the oil retainer (14) are sequentially arranged on the fan shaft (4).
7. The disassembly method of the integral bearing box for the fan is characterized by comprising the following operation steps of:
1) Firstly, removing a fan set (5) and a motor set (6) on two sides of a fan shaft (4); placing the integral bearing box with the fan shaft (4) on a disassembly workbench;
2) Removing the floating end pressing covers (101) and the fixed end pressing covers (102) on two sides of the integral bearing box; a tool shaft sleeve (15) is sleeved along the shaft body of the fan shaft (4), so that the end surface of the tool shaft sleeve (15) is attached to the side surface of the movable end bearing (302);
3) And (3) dismantling the set screw (9) connected to the bearing box inner sleeve (7), and knocking the tool shaft sleeve (15) to detach the bearing box inner sleeve (7), the fixed end bearing (302) and the fan shaft (4).
8. The method for disassembling an integral bearing housing for a fan as claimed in claim 7, wherein: the mounting position of the set screw (9) on the bearing box inner sleeve (7) is above the fan shaft (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210395328.2A CN114688071B (en) | 2022-04-15 | 2022-04-15 | Integral bearing box for fan and disassembling method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210395328.2A CN114688071B (en) | 2022-04-15 | 2022-04-15 | Integral bearing box for fan and disassembling method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114688071A CN114688071A (en) | 2022-07-01 |
| CN114688071B true CN114688071B (en) | 2023-12-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210395328.2A Active CN114688071B (en) | 2022-04-15 | 2022-04-15 | Integral bearing box for fan and disassembling method thereof |
Country Status (1)
| Country | Link |
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| CN (1) | CN114688071B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117803585B (en) * | 2023-12-29 | 2024-05-17 | 广东正州环保科技股份有限公司 | Glass fiber reinforced plastic fan |
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| Publication number | Publication date |
|---|---|
| CN114688071A (en) | 2022-07-01 |
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