CN112936161A - Centering and limiting mechanical seal static ring mounting tool and use method thereof - Google Patents
Centering and limiting mechanical seal static ring mounting tool and use method thereof Download PDFInfo
- Publication number
- CN112936161A CN112936161A CN202110173485.4A CN202110173485A CN112936161A CN 112936161 A CN112936161 A CN 112936161A CN 202110173485 A CN202110173485 A CN 202110173485A CN 112936161 A CN112936161 A CN 112936161A
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- mechanical seal
- centering
- ring
- tool
- 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
- B25B27/0028—Tools for removing or installing seals
-
- 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
- B25B27/02—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for connecting objects by press fit or detaching same
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mechanical Sealing (AREA)
Abstract
The invention belongs to the technical field of helicopter speed reducer tools, and discloses a centering and limiting mechanical seal static ring mounting tool and a use method thereof. The installation tool comprises: the pressing head 2 is provided with a shaft shoulder and a flange and is used for pressing the static ring on the moving ring with preset pressing force. The problems of eccentric press mounting, uneven stress, excessive press mounting and the like of the static ring can be avoided, and the probability of oil leakage is reduced.
Description
Technical Field
The invention belongs to the technical field of helicopter speed reducer tools, and particularly relates to a centering and limiting mechanical seal static ring mounting tool and a use method thereof.
Background
The mechanical seal is a dynamic seal structure common to helicopter retarders, as shown in fig. 1. The reducer generally comprises a moving ring a and a static ring b (graphite ring), when the reducer works, the end face of the moving ring a, a bearing c and a gear d rotate at the same speed, the static ring b and a bearing seat e are static parts, and when the reducer works, the moving ring and the graphite ring of the static ring are in running-in to play a sealing role. After the graphite ring is attached to the end face of the movable ring, certain pretightening force is required, the pretightening force is too small, and oil is easy to leak during working; the excessive pretightening force is easy to aggravate the abrasion of the graphite ring, so that the sealing fails in advance.
An existing assembling tool for a mechanical seal stationary ring of a helicopter speed reducer is shown in figure 2 and is of a pressure head structure (sequence number A), the assembling tool is free of axial centering and limiting functions in the using process, vertical direction press fitting cannot be guaranteed due to structural limitation of the whole machine during use, the problems that the static ring is installed eccentrically and stressed unevenly due to misalignment with the axis of a mounting hole of a casing during installation exist, whether press fitting is in place cannot be judged in the process of press fitting the stationary ring, the static ring is completely leaned on hand feeling, the problem that the seal pretightening force is too large or too small is easily caused, and lubricating oil leakage or premature failure of sealing during working is caused.
Disclosure of Invention
The invention aims to provide a novel mechanical seal stationary ring mounting tool with axial centering guide and axial automatic limiting functions and a using method thereof, which are more suitable for the working condition of whole machine maintenance, can avoid the problems of eccentric press mounting, uneven stress, excessive press mounting and the like of a stationary ring, and reduce the probability of oil leakage.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
the first technical scheme is as follows:
a tool for installing a stationary centering and limiting mechanical seal ring, the tool comprising: the pressing head 2 is provided with a shaft shoulder (used for pressing the static ring) and a flange (used for limiting the installation tool when the flange of the installation tool moves to the casing and ensuring the pre-tightening force requirement) and is used for pressing the static ring on the moving ring by using a preset pressing force.
The first technical scheme of the invention has the characteristics and further improvements that:
(1) 1 main aspects of sleeve are equipped with the internal spline, and 1 main aspects of sleeve are clearance fit with 2 main aspects of pressure head (if for interference fit or excessive cooperation, then can't satisfy the function that the pressure head axial direction was given to the sleeve), and 1 tip of sleeve is equipped with the external screw thread, closes with nut 3 soon, and nut 3's terminal surface and the laminating of the little terminal surface of pressure head (when revolving through the nut, can transmit the pressure head terminal surface evenly with the power that is used in on the nut on, guarantee not the biasing).
(2) The difference between the distance of the flange and the depth of the shaft shoulder is as follows: when the mechanical seal is in a working state, the difference between the installation distance from the movable ring to the end face of the casing and the distance from the graphite ring of the static ring to the end face of the static ring.
(3) The relative travel of the sleeve 1 and the pressure head 2 is larger than the difference between the distance of the flange and the depth of the shaft shoulder. (ensuring proper use of the installation tool).
(4) The internal spline at the large end of the sleeve 1 and the external spline of the gear are arranged in a centering way.
(5) The end face of the large end of the sleeve 1 is attached to the gear shaft shoulder.
(6) The end face of the mechanical seal static ring is attached to the shaft shoulder of the pressure head 2.
The second technical scheme is as follows:
a method for using a tool for installing a centering and limiting mechanical seal stationary ring, which is applied to the tool for installing the centering and limiting mechanical seal stationary ring according to the first technical scheme, wherein the method comprises the following steps:
the internal spline of the sleeve 1 and the external spline of the gear are arranged in a centering way and are attached to the shaft shoulder of the gear, so that the axial centering is ensured;
mounting the mechanical seal static ring at the shaft shoulder of the pressure head 2, and adjusting the static ring to ensure that the end surface of the static ring is attached to the shaft shoulder of the pressure head;
after the adjustment is finished, the nut 3 is screwed to enable the pressure head 2 to move forward uniformly along the sleeve 1 until the flange of the pressure head 2 is attached to the end face of the bearing seat;
at this point, the mechanical seal stationary ring is installed in place.
The mounting tool for the centering and limiting mechanical seal stationary ring provided by the technical scheme of the invention can realize axial centering in the using process and also can realize an axial limiting function, and the mounting tool is composed of a sleeve 1, a pressure head 2 and a nut 3. The pressure head 1 is provided with a shaft shoulder and a flange, so that the static ring can be pressed to a specified position meeting the pre-tightening force when the tool is used. The large end of the sleeve 1 is provided with an internal spline which is matched and centered with an external spline on the gear, the fit between the sleeve and the pressure head is clearance fit, and the sleeve guides the pressure head axially when the pressure head is guaranteed to be used. The small end of the sleeve is provided with external threads for screwing the nut 3, and the end face of the nut 3 is attached to the small end face of the pressure head.
Drawings
FIG. 1 is a schematic view of a prior art gear and bearing block assembly;
FIG. 2 is a structural diagram of an original mechanical seal stationary ring installation tool, (a) is a structural schematic diagram before installation, and (b) is a structural schematic diagram after installation;
FIG. 3 is a block diagram of a mechanical seal stationary ring installation tool of the present invention;
FIG. 4 is a schematic view of the use of the installation tool for the stationary ring of the mechanical seal of the present invention, (a) is a schematic view of the structure before installation, and (b) is a schematic view of the structure after installation;
wherein, 1-sleeve, 2-pressure head, 3-nut, 4-flange and 5-shaft shoulder.
Detailed Description
The technical solution of the present invention is further explained with reference to the drawings and the detailed description.
The embodiment of the invention provides a tool for installing a centering and limiting mechanical seal static ring, which comprises the following components in percentage by weight as shown in fig. 3: sleeve 1, pressure head 2, nut 3 are equipped with the shaft shoulder 5 (be used for carrying out the pressure equipment to quiet ring) and flange 4 (when the flange that is used for the mounting tool moved the quick-witted casket department, carry on spacingly to the mounting tool to guarantee the pretightning force requirement) on the pressure head 2 for compress tightly the quiet ring on the rotating ring with preset packing force.
Further, in the above-mentioned case,
(1) 1 main aspects of sleeve are equipped with the internal spline, and 1 main aspects of sleeve are clearance fit with 2 main aspects of pressure head (if for interference fit or excessive cooperation, then can't satisfy the function that the pressure head axial direction was given to the sleeve), and 1 tip of sleeve is equipped with the external screw thread, closes with nut 3 soon, and nut 3's terminal surface and the laminating of the little terminal surface of pressure head (when revolving through the nut, can transmit the pressure head terminal surface evenly with the power that is used in on the nut on, guarantee not the biasing).
(2) The difference between the distance of the flange and the depth of the shaft shoulder is as follows: when the mechanical seal is in a working state, the difference between the installation distance from the movable ring to the end face of the casing and the distance from the graphite ring of the static ring to the end face of the static ring.
(3) The relative travel of the sleeve 1 and the pressure head 2 is larger than the difference between the distance of the flange and the depth of the shaft shoulder. (ensuring proper use of the installation tool).
As shown in fig. 4, the internal spline of the large end of the sleeve 1 is mounted in alignment with the external spline of the gear. The end face of the large end of the sleeve 1 is attached to the gear shaft shoulder. The end face of the mechanical seal static ring is attached to the shaft shoulder of the pressure head 2.
The embodiment of the invention also provides a use method of the tool for installing the centering and limiting mechanical seal static ring, which is applied to the tool for installing the centering and limiting mechanical seal static ring in the first technical scheme, and the method comprises the following steps:
the internal spline of the sleeve 1 and the external spline of the gear are arranged in a centering way and are attached to the shaft shoulder of the gear, so that the axial centering is ensured;
mounting the mechanical seal static ring at the shaft shoulder of the pressure head 2, and adjusting the static ring to ensure that the end surface of the static ring is attached to the shaft shoulder of the pressure head;
after the adjustment is finished, the nut 3 is screwed to enable the pressure head 2 to move forward uniformly along the sleeve 1 until the flange of the pressure head 2 is attached to the end face of the bearing seat;
at this point, the mechanical seal stationary ring is installed in place.
The mounting tool for the centering and limiting mechanical seal stationary ring provided by the technical scheme of the invention can realize axial centering in the using process and also can realize an axial limiting function, and the mounting tool is composed of a sleeve 1, a pressure head 2 and a nut 3. The pressure head 1 is provided with a shaft shoulder and a flange, so that the static ring can be pressed to a specified position meeting the pre-tightening force when the tool is used. The large end of the sleeve 1 is provided with an internal spline which is matched and centered with an external spline on the gear, the fit between the sleeve and the pressure head is clearance fit, and the sleeve guides the pressure head axially when the pressure head is guaranteed to be used. The small end of the sleeve is provided with external threads for screwing the nut 3, and the end face of the nut 3 is attached to the small end face of the pressure head.
The invention designs a novel mechanical seal static ring mounting tool capable of realizing axial centering and limiting by combining the structural characteristics of the gear and the bearing seat assembly, can prevent the problems of oil leakage and sealing failure caused by the problems of end face deflection, improper press mounting, overlarge press mounting pretightening force and the like during mounting of the static ring, is simple to operate and convenient to use, and improves the maintenance efficiency of an outfield.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. A tool for installing a stationary seal ring of a centering and limiting mechanical seal, the tool comprising: the pressing device comprises a sleeve (1), a pressing head (2) and a nut (3), wherein a shaft shoulder (5) and a flange (4) are arranged on the pressing head (2) and used for pressing a static ring on a moving ring with a preset pressing force.
2. The mounting tool for the centering and limiting mechanical seal stationary ring as claimed in claim 1, wherein the large end of the sleeve (1) is provided with an internal spline, the large end of the sleeve (1) is in clearance fit with the large end of the pressure head (2), the small end of the sleeve (1) is provided with an external thread which is screwed with the nut (3), and the end face of the nut (3) is attached to the small end face of the pressure head.
3. The tool for installing the static ring of the centering and limiting mechanical seal as claimed in claim 1, wherein the difference between the distance of the flange and the depth of the shaft shoulder is as follows: when the mechanical seal is in a working state, the difference between the installation distance from the movable ring to the end face of the casing and the distance from the graphite ring of the static ring to the end face of the static ring.
4. A tool for installing a centering and limiting mechanical seal stationary ring according to claim 3, characterized in that the relative travel of the sleeve (1) and the pressure head (2) is larger than the difference between the distance of the rib and the depth of the shaft shoulder.
5. A tool for installing a centering and limiting mechanical seal static ring according to claim 1, characterized in that the internal spline of the large end of the sleeve (1) is installed in a centering way with the external spline of the gear.
6. A tool for installing a centering and limiting mechanical seal static ring according to claim 1, characterized in that the end surface of the large end of the sleeve (1) is abutted against the gear shaft shoulder.
7. A tool for installing a centering and limiting mechanical seal static ring according to claim 1, characterized in that the end face of the mechanical seal static ring is abutted against the shaft shoulder of the pressure head (2).
8. A method of using a tool for installing a centering and limiting mechanical seal stationary ring, the tool being applied to the tool for installing a mechanical seal stationary ring according to any one of claims 1 to 7, the method comprising:
the internal spline of the sleeve 1 and the external spline of the gear are arranged in a centering way and are attached to the shaft shoulder of the gear, so that the axial centering is ensured;
mounting the mechanical seal static ring at the shaft shoulder of the pressure head (2), and adjusting the static ring to ensure that the end surface of the static ring is attached to the shaft shoulder of the pressure head;
after the adjustment is finished, the nut (3) is screwed to enable the pressure head (2) to move forward uniformly along the sleeve (1) until the flange of the pressure head (2) is attached to the end face of the bearing seat;
at this point, the mechanical seal stationary ring is installed in place.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110173485.4A CN112936161A (en) | 2021-02-09 | 2021-02-09 | Centering and limiting mechanical seal static ring mounting tool and use method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110173485.4A CN112936161A (en) | 2021-02-09 | 2021-02-09 | Centering and limiting mechanical seal static ring mounting tool and use method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112936161A true CN112936161A (en) | 2021-06-11 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110173485.4A Pending CN112936161A (en) | 2021-02-09 | 2021-02-09 | Centering and limiting mechanical seal static ring mounting tool and use method thereof |
Country Status (1)
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| CN (1) | CN112936161A (en) |
Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0168891A2 (en) * | 1984-07-16 | 1986-01-22 | RORY Ltd. | Cap-, Dropper- and ring assembly for bottles |
| JP2001246521A (en) * | 2000-03-01 | 2001-09-11 | Denso Corp | Method for installation of sealant and installation device |
| CN201609883U (en) * | 2009-12-31 | 2010-10-20 | 上海东方泵业(集团)有限公司 | Mechanical seal static ring pressing device |
| CN102398148A (en) * | 2010-09-08 | 2012-04-04 | 江苏江旭铸造集团有限公司 | Seal ring pressing device |
| CN202241070U (en) * | 2011-08-29 | 2012-05-30 | 山东临工工程机械有限公司 | Press mounting tool for sealing rings |
| CN104551604A (en) * | 2015-01-09 | 2015-04-29 | 哈尔滨东安发动机（集团）有限公司 | Bearing mounting tool with centering function |
| CN205184661U (en) * | 2015-11-22 | 2016-04-27 | 盐城市威驰船厂 | Installation lifts specialized tool of jar sealing washer |
| CN205310155U (en) * | 2016-02-01 | 2016-06-15 | 江苏南方轴承股份有限公司 | Bearing seal circle installation frock |
| US20160312656A1 (en) * | 2015-04-27 | 2016-10-27 | United Technologies Corporation | Methods and tools for pressing a ring seal into a component |
| CN206825325U (en) * | 2017-04-25 | 2018-01-02 | 济南吉利汽车零部件有限公司 | Seal coil installing device |
| CN207500477U (en) * | 2017-10-19 | 2018-06-15 | 上海诺科泵业有限公司 | A kind of positioning auxiliaring tool |
| CN209158260U (en) * | 2018-12-24 | 2019-07-26 | 福建福山轴承有限公司 | A kind of bearing sealed ring press-loading apparatus |
| CN209540021U (en) * | 2019-02-21 | 2019-10-25 | 厦门大卫科技有限公司 | Reduce off-flavor shape sealing ring tooling |
| CN210414367U (en) * | 2019-07-18 | 2020-04-28 | 成都中科智成科技有限责任公司 | Assembly fixture for axial sealing O-shaped ring |
| CN212286563U (en) * | 2020-02-25 | 2021-01-05 | 广西汽车集团有限公司 | Press mounting equipment of rear axle assembly |
-
2021
- 2021-02-09 CN CN202110173485.4A patent/CN112936161A/en active Pending
Patent Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0168891A2 (en) * | 1984-07-16 | 1986-01-22 | RORY Ltd. | Cap-, Dropper- and ring assembly for bottles |
| JP2001246521A (en) * | 2000-03-01 | 2001-09-11 | Denso Corp | Method for installation of sealant and installation device |
| CN201609883U (en) * | 2009-12-31 | 2010-10-20 | 上海东方泵业(集团)有限公司 | Mechanical seal static ring pressing device |
| CN102398148A (en) * | 2010-09-08 | 2012-04-04 | 江苏江旭铸造集团有限公司 | Seal ring pressing device |
| CN202241070U (en) * | 2011-08-29 | 2012-05-30 | 山东临工工程机械有限公司 | Press mounting tool for sealing rings |
| CN104551604A (en) * | 2015-01-09 | 2015-04-29 | 哈尔滨东安发动机（集团）有限公司 | Bearing mounting tool with centering function |
| US20160312656A1 (en) * | 2015-04-27 | 2016-10-27 | United Technologies Corporation | Methods and tools for pressing a ring seal into a component |
| CN205184661U (en) * | 2015-11-22 | 2016-04-27 | 盐城市威驰船厂 | Installation lifts specialized tool of jar sealing washer |
| CN205310155U (en) * | 2016-02-01 | 2016-06-15 | 江苏南方轴承股份有限公司 | Bearing seal circle installation frock |
| CN206825325U (en) * | 2017-04-25 | 2018-01-02 | 济南吉利汽车零部件有限公司 | Seal coil installing device |
| CN207500477U (en) * | 2017-10-19 | 2018-06-15 | 上海诺科泵业有限公司 | A kind of positioning auxiliaring tool |
| CN209158260U (en) * | 2018-12-24 | 2019-07-26 | 福建福山轴承有限公司 | A kind of bearing sealed ring press-loading apparatus |
| CN209540021U (en) * | 2019-02-21 | 2019-10-25 | 厦门大卫科技有限公司 | Reduce off-flavor shape sealing ring tooling |
| CN210414367U (en) * | 2019-07-18 | 2020-04-28 | 成都中科智成科技有限责任公司 | Assembly fixture for axial sealing O-shaped ring |
| CN212286563U (en) * | 2020-02-25 | 2021-01-05 | 广西汽车集团有限公司 | Press mounting equipment of rear axle assembly |
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Application publication date: 20210611 |
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| RJ01 | Rejection of invention patent application after publication |