CN107297710B - Closed extrusion oil film damper assembly tool with centering function and assembly method - Google Patents
Closed extrusion oil film damper assembly tool with centering function and assembly method Download PDFInfo
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- CN107297710B CN107297710B CN201710734880.9A CN201710734880A CN107297710B CN 107297710 B CN107297710 B CN 107297710B CN 201710734880 A CN201710734880 A CN 201710734880A CN 107297710 B CN107297710 B CN 107297710B
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- damper
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- outer sleeve
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
- B25B27/14—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for assembling objects other than by press fit or detaching same
- B25B27/28—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for assembling objects other than by press fit or detaching same positioning or withdrawing resilient bushings or the like
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Fluid-Damping Devices (AREA)
Abstract
A closed extrusion oil film damper assembly tool with a centering function and an assembly method belong to the technical field of extrusion oil film damper assembly. The closed extrusion oil film damper assembly tool with the centering function comprises: a shaft with a threaded disc, a floating disc, an outer sleeve, a fixed nut, an assembly bolt and a disassembly bolt; one end of the shaft with the threaded disc is provided with a threaded disc, the other end of the shaft with the threaded disc is provided with a thread, an optical axis is arranged between the thread and the threaded disc, the other end of the shaft with the threaded disc sequentially penetrates through a through hole in the center of the outer sleeve and a through hole in the center of the floating disc, and the fixing nut is matched with the thread; the floating disc is provided with a first bolt hole, the first bolt hole is provided with an assembling bolt, and the assembling bolt abuts against the end face of the outer sleeve; a second bolt hole is formed in the outer sleeve, and a dismounting bolt is arranged in the second bolt hole. The assembling tool can avoid the situation that the inner ring end faces the outer ring and the sealing ring is blocked due to deflection of the inner ring and the outer ring of the damper.
Description
Technical Field
The invention relates to the technical field of assembly of extrusion oil film dampers, in particular to a closed extrusion oil film damper assembly tool with a centering function and an assembly method.
Background
The extrusion oil film damper is widely applied to modern aero-engines, and the aim of increasing damping and inhibiting the vibration of the engine rotor is achieved by extruding only about 0.1mm oil film between the inner ring and the outer ring of the damper. When the closed extrusion oil film damper is assembled, the sealing rings are clamped at two ends of the inner ring of the damper, the outer diameter of the sealing rings is slightly larger than the inner diameter of the outer ring of the damper in a free state, and the sealing rings are made of graphite cast iron generally and have certain hardness and elasticity. Under the condition, the centering type closed extrusion oil film damper, namely the closed extrusion oil film damper with the squirrel cage elastic support is difficult to assemble into the damper outer ring together with the sealing rings, deflection is easy to occur between the inner ring and the outer ring of the damper in the assembling process, the inner ring of the damper with the sealing rings is likely to be clamped in the damper outer ring, the strength is difficult to grasp in the assembling process, and if the closed extrusion oil film damper with the squirrel cage elastic support is pushed into the damper outer ring by a strong action, the squirrel cage elastic support is greatly deformed, even the squirrel cage strips are plastically deformed or broken, so that the working reliability of the damper is affected.
Disclosure of Invention
In order to solve the problem that the inner ring of the damper provided with the sealing ring is easy to be blocked in the outer ring of the damper in the prior art, on one hand, the invention provides a closed extrusion oil film damper assembly tool with a centering function, which comprises: the device comprises a centering shaft, a floating disc, a jacket, a fixed nut, an assembly bolt and a disassembly bolt;
one end of the centering shaft is provided with a thread disc, the other end of the centering shaft is provided with a thread, an optical axis is arranged between the thread and the thread disc, the other end of the centering shaft sequentially penetrates through a through hole in the center of the outer sleeve and a through hole in the center of the floating disc, the fixing nut is matched with the thread, and the optical axis can slide in the through hole in the center of the outer sleeve and the through hole in the center of the floating disc;
a plurality of first bolt holes are uniformly formed in the circumference of the floating disc, each first bolt hole is internally provided with a mounting bolt, and each mounting bolt is propped against the end face of the outer sleeve;
a plurality of second bolt holes are uniformly formed in the outer sleeve in the circumferential direction, and a dismounting bolt is arranged in each second bolt hole.
Four first bolt holes are uniformly formed in the circumference of the floating disc.
Two to four second bolt holes are uniformly formed in the outer sleeve in the circumferential direction.
In another aspect, the present invention provides a method of assembling a damper using the closed squeeze film damper assembly tool having a centering action, the method comprising:
step 1, processing a transitional conical surface in an outer ring of the damper, and sleeving a sealing ring on an inner ring of the damper;
step 2, connecting the threaded disc with internal threads of an inner ring of the damper sleeved with the sealing ring to form a first assembly;
step 3, installing the damper outer ring in the outer sleeve, installing one dismounting bolt in each second bolt hole of the outer sleeve, and enabling each dismounting bolt to be propped against the end face of the damper outer ring to form a second assembly;
step 4, installing one assembly bolt in each first bolt hole of the floating disc to form a third assembly;
step 5, placing the first assembly at the position of the transitional conical surface of the damper outer ring, and enabling one end of the centering shaft provided with threads to penetrate through a through hole in the center of the outer sleeve;
step 6, enabling one end, provided with threads, of the centering shaft to penetrate through the through hole in the center of the floating disc, and screwing the fixing nut on the threads of the centering shaft;
and 7, uniformly screwing a plurality of assembly bolts of the third assembly to enable the floating disc to press the fixing nut, continuously screwing a plurality of assembly bolts to enable the centering shaft to drive the damper inner ring sleeved with the sealing ring to move towards the damper outer ring along the transition conical surface until the damper inner ring reaches a required installation position.
The assembling tool of the invention applies the centering principle to assemble the closed extrusion oil film damper with the sealing ring, and the centering function of the assembling tool ensures that the inner ring and the outer ring of the damper are always coaxial in the assembling process, and eliminates the risk of plastic deformation and even damage caused by pressure, thereby protecting the squirrel cage bars. Meanwhile, scratch and blockage of the sealing ring, which are caused by deflection of the inner ring end and the outer ring, are avoided. The assembly tool is also suitable for assembling non-centering closed extrusion oil film dampers, namely dampers without squirrel-cage elastic support and other cylindrical structures with sealing rings or sealing expansion rings.
Drawings
FIG. 1 is a schematic view of a structure provided by the present invention for assembly using a closed squeeze film damper assembly tool with centering;
FIG. 2 is a schematic view of a first assembly provided by the present invention;
FIG. 3 is a schematic view of a second assembly provided by the present invention;
FIG. 4 is a schematic view of a third assembly provided by the present invention;
FIG. 5 is a schematic view of the damper inner ring provided by the present invention installed inside the damper outer ring.
Wherein, the liquid crystal display device comprises a liquid crystal display device,
the device comprises a centering shaft 1, a floating disc 2, a sleeve 3, a fixing nut 4, an assembling bolt 5, a disassembling bolt 6, a threaded disc 7, threads 8, a 9 optical axis, a through hole in the center of the sleeve 10, a through hole in the center of the floating disc 11, an outer damper ring 12, an inner damper ring 13, a squirrel cage elastic support 14, a sealing ring 15 and a transitional conical surface A.
Detailed Description
Example 1
In order to solve the problem that a damper inner ring provided with a sealing ring is easy to be clamped in a damper outer ring in the prior art, as shown in fig. 1, the invention provides a closed extrusion oil film damper assembly tool with a centering function, which comprises: the centering shaft 1, the floating disc 2, the outer sleeve 3, the fixed nut 4, the assembly bolt 5 and the disassembly bolt 6;
one end of the centering shaft 1 is provided with a thread disk 7, the other end is provided with a thread 8, an optical axis 9 is arranged between the thread 8 and the thread disk 7, the other end of the centering shaft 1 sequentially penetrates through a through hole 10 in the center of the outer sleeve 3 and a through hole 11 in the center of the floating disk 2, the fixed nut 4 is matched with the thread 8, and the optical axis 9 can slide in the through hole 10 in the center of the outer sleeve 3 and the through hole 11 in the center of the floating disk 2;
a plurality of first bolt holes are uniformly arranged on the floating disc 2 in the circumferential direction with a certain radius, for example, four first bolt holes can be uniformly arranged on the floating disc 2, one assembly bolt 5 is arranged in each first bolt hole, and each assembly bolt 5 is abutted against the end face of the outer sleeve 3;
a plurality of second bolt holes are uniformly provided on the outer jacket 3 circumferentially at a certain radius, for example, two to four second bolt holes may be uniformly arranged on the outer jacket 3, and one dismounting bolt 6 is installed in each second bolt hole.
Example 2
An embodiment of the present invention provides a method for assembling a closed squeeze film damper using the closed squeeze film damper assembling tool having a centering function of embodiment 1, wherein the closed squeeze film damper includes a damper outer ring 12 and a damper inner ring 13, the damper inner ring 13 having a squirrel cage elastic support 14, and in the process of assembling, it is necessary to install seal rings 15 at both ends of the damper inner ring 13, and then install the damper inner ring 13 with the seal rings 15 inside the damper outer ring 12, the assembling method comprising:
step 1, a transitional conical surface A is processed in an outer ring 12 of the damper, and a sealing ring 15 is sleeved on an inner ring 13 of the damper;
in order to better achieve the assembly effect when using the assembly tool of the present invention, a transitional cone a may be machined into the damper outer ring 12, which can assist in assembly.
Step 2, as shown in fig. 2, connecting the thread disc 7 with the internal thread of the damper inner ring 13 sleeved with the sealing ring 15 to form a first assembly;
in the present invention, the damper inner ring 13 having the internal thread may be directly connected to the screw plate 7, and the damper inner ring 13 having no internal thread may be formed by machining the internal thread in the damper inner ring 13.
Step 3, as shown in fig. 3, installing the damper outer ring 12 in the outer sleeve 3, installing a disassembling bolt 6 in each second bolt hole of the outer sleeve 3, and enabling each disassembling bolt 6 to be abutted against the end face of the damper outer ring 12 to form a second assembly;
the dismounting bolt 6 is mainly used for ejecting the damper outer ring 12 out of the outer sleeve 3 when the dismounting bolt 6 is rotated after the assembly is completed.
Step 4, as shown in fig. 4, installing an assembly bolt 5 in each first bolt hole of the floating disc 2 to form a third assembly;
step 5, placing the first component at the position of the transitional conical surface A of the damper outer ring 12, and enabling one end of the centering shaft 1 provided with threads 8, namely one end without a thread disc 7 to penetrate through a through hole 10 in the center of the outer sleeve 3;
step 6, referring to fig. 1 and 4, the end of the centering shaft 1 provided with the thread 8, namely the end without the thread disk 7, passes through the through hole 11 in the center of the floating disk 2, and the fixing nut 4 is screwed on the thread 8 of the centering shaft 1;
and 7, uniformly screwing a plurality of assembly bolts 5 of the third assembly, pressing the floating disc 2 to the fixed nut 4, continuously screwing the plurality of assembly bolts 5, and enabling the centering shaft 1 to drive the damper inner ring 13 sleeved with the sealing ring 15 to move into the damper outer ring 12 along the transition conical surface A until the damper inner ring 13 reaches a required installation position.
In the invention, because the floating disc 2 is in threaded connection with the assembling bolt 5, and the assembling bolt 5 is abutted against the outer sleeve 3, when the assembling bolt 5 is screwed, the floating disc 2 moves on the centering shaft 1, when the floating disc 2 moves to the position of the fixing nut 4, the fixing nut 4 clamps the floating disc 2, the assembling bolt 5 is screwed continuously, the floating disc 2 drives the centering shaft 1 to move continuously, the threaded disc 7 is connected with the damper inner ring 13 in a threaded manner, the centering shaft 1 pulls the damper inner ring 13 to overcome the resistance of the sealing ring 15, the damper inner ring 13 is pulled into the damper outer ring 12, the contact surface of the optical axis 9 on the centering shaft 1 and the through hole 10 of the outer sleeve 3 can form a centering surface B because the through hole 10 on the outer sleeve 3 is positioned at the center of the outer sleeve 3, the contact surface of the damper outer ring 12 and the outer sleeve 3 also forms a centering surface C, which plays a role in centering together, so that the central axes of the damper inner ring 13 and the damper outer ring 12 are coincident during assembly, and when all the assembly bolts 5 are uniformly screwed, the sealing ring 15 gradually contracts under the extrusion of the transitional conical surface A, the sealing ring 15 and the damper inner ring 13 slowly and gently enter the damper outer ring 12, as shown in fig. 5, a schematic diagram of the damper inner ring 13 installed in the damper outer ring 12 is shown, only part of the structure of the damper outer ring 12 is shown in fig. 1, and the complete transitional conical surface A of the damper outer ring 12 and the connecting part of the rear end of the damper outer ring 12 and the damper inner ring 13 are not shown.
The assembling tool of the invention applies the centering principle to assemble the closed extrusion oil film damper with the sealing ring 15, and the centering function of the assembling tool ensures that the inner ring and the outer ring of the damper are always coaxial in the assembling process, and eliminates the risk of plastic deformation and even damage caused by pressure, thereby protecting the squirrel cage bars. Meanwhile, scratch and blockage of the sealing ring, which are caused by deflection of the inner ring end and the outer ring, are avoided. The assembly tool is also suitable for assembling non-centering closed extrusion oil film dampers, namely dampers without squirrel-cage elastic support and other cylindrical structures with sealing rings or sealing expansion rings.
The foregoing embodiment numbers of the present invention are merely for the purpose of description, and do not represent the advantages or disadvantages of the embodiments.
The foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the invention are intended to be included within the scope of the invention.
Claims (3)
1. A method of assembling a damper with centering closed squeeze film damper assembly tool, the centering closed squeeze film damper assembly tool comprising: the device comprises a centering shaft, a floating disc, a jacket, a fixed nut, an assembly bolt and a disassembly bolt; one end of the centering shaft is provided with a thread disc, the other end of the centering shaft is provided with a thread, an optical axis is arranged between the thread and the thread disc, the other end of the centering shaft sequentially penetrates through a through hole in the center of the outer sleeve and a through hole in the center of the floating disc, the fixing nut is matched with the thread, the optical axis can slide in the through hole in the center of the outer sleeve and the through hole in the center of the floating disc, a centering surface B is formed on the contact surface of the optical axis on the centering shaft and the through hole of the outer sleeve, and a centering surface C is formed on the contact surface of the outer ring of the damper and the outer sleeve; a plurality of first bolt holes are uniformly formed in the circumference of the floating disc, each first bolt hole is internally provided with a mounting bolt, and each mounting bolt is propped against the end face of the outer sleeve; a plurality of second bolt holes are uniformly formed in the circumferential direction of the outer sleeve, and a dismounting bolt is arranged in each second bolt hole;
the method comprises the following steps:
step 1, processing a transitional conical surface in an outer ring of the damper, and sleeving a sealing ring on an inner ring of the damper;
step 2, connecting the threaded disc with internal threads of an inner ring of the damper sleeved with the sealing ring to form a first assembly;
step 3, installing the damper outer ring in the outer sleeve, installing one dismounting bolt in each second bolt hole of the outer sleeve, and enabling each dismounting bolt to be propped against the end face of the damper outer ring to form a second assembly;
step 4, installing one assembly bolt in each first bolt hole of the floating disc to form a third assembly;
step 5, placing the first assembly at the position of the transitional conical surface of the damper outer ring, and enabling one end of the centering shaft provided with threads to penetrate through a through hole in the center of the outer sleeve;
step 6, enabling one end, provided with threads, of the centering shaft to penetrate through the through hole in the center of the floating disc, and screwing the fixing nut on the threads of the centering shaft;
and 7, uniformly screwing a plurality of assembly bolts of the third assembly to enable the floating disc to press the fixing nut, continuously screwing a plurality of assembly bolts to enable the centering shaft to drive the damper inner ring sleeved with the sealing ring to move towards the damper outer ring along the transition conical surface until the damper inner ring reaches a required installation position.
2. The method for assembling the damper by using the closed extrusion oil film damper assembling tool with the centering function as claimed in claim 1, wherein four first bolt holes are uniformly formed in the floating disc in the circumferential direction.
3. The method for assembling a damper by using a closed extrusion oil film damper assembling tool with centering function according to claim 1, wherein two to four second bolt holes are uniformly formed in the outer sleeve in the circumferential direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710734880.9A CN107297710B (en) | 2017-08-24 | 2017-08-24 | Closed extrusion oil film damper assembly tool with centering function and assembly method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710734880.9A CN107297710B (en) | 2017-08-24 | 2017-08-24 | Closed extrusion oil film damper assembly tool with centering function and assembly method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107297710A CN107297710A (en) | 2017-10-27 |
| CN107297710B true CN107297710B (en) | 2023-09-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710734880.9A Active CN107297710B (en) | 2017-08-24 | 2017-08-24 | Closed extrusion oil film damper assembly tool with centering function and assembly method |
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| CN (1) | CN107297710B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113982904A (en) * | 2021-11-29 | 2022-01-28 | 黄秀芳 | Drill pump crosshead pin extracting tool |
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| JPH09277808A (en) * | 1996-04-15 | 1997-10-28 | Takeuchi Giken Seisakusho:Goushi | Mounting/demounting device for tire |
| CN202278543U (en) * | 2011-10-25 | 2012-06-20 | 福建省福工动力技术股份公司 | Portable tool for dismounting and mounting belt wheel |
| CN202668031U (en) * | 2012-07-10 | 2013-01-16 | 江苏新瑞戴维布朗齿轮***有限公司 | Disassembly and assembly structure of reduction box output shaft and flange plate |
| CN203141426U (en) * | 2013-04-12 | 2013-08-21 | 南车戚墅堰机车有限公司 | Cutter loosening oil cylinder rear cover ejector tool |
| CN204094739U (en) * | 2014-09-04 | 2015-01-14 | 天津百利展发集团有限公司 | A kind of dismounting puller of valve seat |
| CN204321536U (en) * | 2014-12-03 | 2015-05-13 | 上海创力集团股份有限公司 | A kind of colliery hydraulic dismounting device |
| CN206010934U (en) * | 2016-06-22 | 2017-03-15 | 南京中船绿洲机器有限公司 | A kind of disc type separator rotary drum hydraulic dismounting/mounting tool |
| CN207058486U (en) * | 2017-08-24 | 2018-03-02 | 沈阳航空航天大学 | Closed Extrusion film damper assembly tool with certralizing ability |
-
2017
- 2017-08-24 CN CN201710734880.9A patent/CN107297710B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09277808A (en) * | 1996-04-15 | 1997-10-28 | Takeuchi Giken Seisakusho:Goushi | Mounting/demounting device for tire |
| CN202278543U (en) * | 2011-10-25 | 2012-06-20 | 福建省福工动力技术股份公司 | Portable tool for dismounting and mounting belt wheel |
| CN202668031U (en) * | 2012-07-10 | 2013-01-16 | 江苏新瑞戴维布朗齿轮***有限公司 | Disassembly and assembly structure of reduction box output shaft and flange plate |
| CN203141426U (en) * | 2013-04-12 | 2013-08-21 | 南车戚墅堰机车有限公司 | Cutter loosening oil cylinder rear cover ejector tool |
| CN204094739U (en) * | 2014-09-04 | 2015-01-14 | 天津百利展发集团有限公司 | A kind of dismounting puller of valve seat |
| CN204321536U (en) * | 2014-12-03 | 2015-05-13 | 上海创力集团股份有限公司 | A kind of colliery hydraulic dismounting device |
| CN206010934U (en) * | 2016-06-22 | 2017-03-15 | 南京中船绿洲机器有限公司 | A kind of disc type separator rotary drum hydraulic dismounting/mounting tool |
| CN207058486U (en) * | 2017-08-24 | 2018-03-02 | 沈阳航空航天大学 | Closed Extrusion film damper assembly tool with certralizing ability |
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| Publication number | Publication date |
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| CN107297710A (en) | 2017-10-27 |
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