CN109340378B - Automatic packing sealing device compresses tightly - Google Patents
Automatic packing sealing device compresses tightly Download PDFInfo
- Publication number
- CN109340378B CN109340378B CN201811340923.6A CN201811340923A CN109340378B CN 109340378 B CN109340378 B CN 109340378B CN 201811340923 A CN201811340923 A CN 201811340923A CN 109340378 B CN109340378 B CN 109340378B
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- Prior art keywords
- sealing
- packing
- transmission gear
- temperature
- displacement
- Prior art date
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Links
- 238000007789 sealing Methods 0.000 title claims abstract description 102
- 238000012856 packing Methods 0.000 title claims abstract description 89
- 230000005540 biological transmission Effects 0.000 claims abstract description 88
- 230000007246 mechanism Effects 0.000 claims abstract description 30
- 230000006835 compression Effects 0.000 claims abstract description 16
- 238000007906 compression Methods 0.000 claims abstract description 16
- 238000001514 detection method Methods 0.000 claims abstract description 13
- 238000006073 displacement reaction Methods 0.000 claims description 46
- 210000004907 gland Anatomy 0.000 claims description 26
- 239000000945 filler Substances 0.000 claims description 17
- 230000008859 change Effects 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 5
- 230000008569 process Effects 0.000 claims description 5
- 238000012544 monitoring process Methods 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 230000033001 locomotion Effects 0.000 description 9
- 239000013535 sea water Substances 0.000 description 8
- 238000005056 compaction Methods 0.000 description 5
- 230000009471 action Effects 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 244000309464 bull Species 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/34—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member
- F16J15/3492—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member with monitoring or measuring means associated with the seal
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/34—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member
- F16J15/3436—Pressing means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/34—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member
- F16J15/3436—Pressing means
- F16J15/346—Pressing means the pressing force varying during operation
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sealing Devices (AREA)
Abstract
The invention discloses an automatic packing sealing device which is simple and reliable in structure, can realize automatic operation and can adaptively adjust the packing state of a packing assembly. The automatic packing sealing device comprises: the device comprises a sealing structure, a compression transmission mechanism and a detection mechanism; the on-line detection of the state parameters of the packing sealing device (namely, the control unit automatically monitors the temperature of the packing assembly and the stroke of the pressing mechanism) by the setting detection mechanism, and the real-time self-adaptive adjustment of the packing sealing device is automatically realized according to the detected state parameters, so that the automation level of the sealing device is improved, meanwhile, the equipment can be ensured to always belong to a good working state, and the safety and the reliability of the equipment in real-time operation are greatly improved.
Description
Technical Field
The invention relates to a sealing device, in particular to an automatic packing sealing device.
Background
At present, the traditional packing sealing device for ships mainly realizes the compaction or relaxation of sealing packing by manually operating a transmission gear by a spanner so as to achieve the function of sealing seawater, and the main structure is shown in figure 1, and is used for a stern shaft in the field of ships, and the main working principle of equipment is as follows: the whole sealing device is sleeved on a sealing main shaft 109 (i.e. a stern shaft), a sealing shell 102 is connected on a pressure-resistant partition wall through bolt fastening, a sealing end cover 104 is arranged on the sealing shell 102 through bolts, the sealing end cover 104 is sleeved on the sealing main shaft 109, a packing assembly 103 is arranged in an annular space between the inner circumferential surface of the sealing end cover 104 and the outer circumferential surface of the sealing main shaft 109, one end of the packing assembly 103 opposite to the outboard seawater 101 is abutted against the inner bottom surface of the sealing end cover 104, a through hole on the inner bottom surface of the sealing end cover 104 is tightly attached to the sealing main shaft 109, the other end of the packing assembly is opposite to a pressing mechanism, and the outboard seawater 101 is used for pressing the packing assembly 103 through the pressing mechanism to realize sealing.
The packing sealing device is mainly characterized in that the packing sealing device is mainly pressed by a pressing mechanism, the pressing mechanism mainly comprises a transmission screw 105, a transmission pinion 107, a transmission large gear 108 and other parts, the transmission screw 105 penetrates through a cylindrical hole of a packing gland 106, one end of the transmission screw is fixedly arranged on a sealing end cover 104, the other end of the transmission screw is in a threaded structure, an inner hole is provided with a transmission pinion 107 with a corresponding threaded structure, a plurality of transmission pinions 107 and the transmission screw 105 are arranged in a circle direction, the transmission pinions 107 are simultaneously kneaded with the transmission large gear 108, when one transmission pinion 107 is operated to drive the large gear 108 to move, the synchronous movement of one circle of transmission pinions 107 is finally realized, the transmission pinions 107 in synchronous movement realize axial displacement on the transmission screw 105, and finally the axial movement of the packing gland 106 on the transmission screw 105 is pushed, so that the packing 103 is pressed or loosened.
The conventional packing seal apparatus described above has the following problems and drawbacks:
(1) The operator needs to prepare a special operating spanner to rotate the transmission pinion, so that the labor intensity is high.
(2) The device transmission principle is that a certain transmission pinion is operated to drive a transmission gearwheel to rotate, then other transmission pinions are driven to synchronously move, axial movement of a packing gland on a transmission screw is finally realized, the whole transmission principle is complex, and if a clamping stagnation occurs at a certain position of an intermediate transmission structure or the transmission screw is poor in installation concentricity, the transmission mechanism is caused to be failed, and normal work cannot be performed.
(3) In the running process of the packing sealing device, a post is required to be set at the position for a long time, packing leakage condition is observed in real time, and the packing sealing device is pressed or loosened.
(4) In the running process of the device, the packing assembly compaction degree does not realize quantitative detection, meanwhile, the internal temperature value of the packing assembly is not mastered, the excessive compaction amount of the packing assembly cannot be judged in advance, the failure fault of the sealing assembly caused by the excessive temperature rise is avoided, and the safety and reliability are poor.
Disclosure of Invention
In view of the above, the invention provides an automatic packing sealing device which has a simple and reliable structure, can realize automatic operation, adaptively adjusts the packing state of a packing sealing assembly, and improves the operation economy and the running performance and the safety reliability of equipment.
The automatic packing sealing device comprises: a packing sealing structure and a compression transmission mechanism; the packing sealing structure comprises a sealing shell, a sealing packing assembly and a sealing end cover; the compression transmission mechanism is used for compressing or loosening the sealing filler assembly;
the compaction transmission mechanism comprises: the device comprises a transmission gear A, a transmission gear B, a packing gland and a motor;
one end of the packing gland is positioned in the central hole of the sealing end cover and opposite to the sealing packing assembly, and the packing gland can axially move in the central hole of the sealing end cover; the sealing end cover is screwed with the internal thread of the inner hole of the transmission gear A through the external thread on the outer circumferential surface of the sealing end cover; the motor output shaft of the motor is coaxially connected with a transmission gear B, and the transmission gear B is meshed with the transmission gear A; and a ball thrust bearing is arranged between the other end of the packing gland and the transmission gear A.
Further comprises: a detection mechanism, the detection mechanism comprising: a temperature sensor, a displacement sensor and a control unit; the temperature sensor is used for monitoring the temperature of the sealing filler assembly; the displacement sensor is used for measuring the axial displacement of the transmission gear A; the measured values of the temperature sensor and the displacement sensor are transmitted to the control unit, and meanwhile, the rotation of the motor is controlled by the control unit;
the control unit is internally preset with a curve relation between the temperature change of the sealing filler assembly and the axial displacement of the transmission gear A and a temperature range of the sealing filler assembly in a normal compression state; when the measured temperature value of the temperature sensor exceeds a preset temperature range in the control unit, the control unit calculates a temperature change amount required by the packing seal assembly to recover to a normal compression state according to the current temperature, and converts the temperature change amount into a displacement amount of the transmission gear A through a curve relationship between the temperature change of the packing seal assembly in the packing seal assembly and the axial displacement amount of the transmission gear A; and then the control unit automatically controls the motor to rotate according to the displacement, so that the ball thrust bearing pushes the packing gland to axially move, the displacement sensor measures the displacement of the transmission gear A in real time in the process, and when the displacement reaches the displacement obtained after conversion, the control unit controls the motor to stop rotating.
The beneficial effects are that:
(1) The compressing transmission mechanism of the tight packing sealing device adopts an automatic compressing transmission mechanism driven by a motor, so that the manual operation requirement of the traditional packing sealing device can be eliminated, and the automation level of equipment is improved.
(2) The on-line detection of the state parameters of the packing sealing device (namely, the control unit automatically monitors the temperature of the packing assembly and the stroke of the pressing mechanism) by the setting detection mechanism, and the real-time self-adaptive adjustment of the packing sealing device is automatically realized according to the detection state parameters, so that on one hand, the working strength of on-site observation and adjustment of personnel is saved, meanwhile, the equipment can be ensured to always belong to a good working state, and the safety and the reliability of the equipment in real-time operation are greatly improved.
Drawings
FIG. 1 is a schematic view of a conventional packing seal apparatus;
wherein: 101-outboard seawater, 102-seal housing, 103-packing assembly, 104-seal end cap, 105-drive screw, 106-packing gland, 107-drive pinion, 108-drive bull gear, 109-seal spindle
Fig. 2 is a schematic structural view of the packing seal apparatus of the present invention.
Wherein: 1-outboard seawater, 2-seal housing, 3-temperature sensor, 4-seal packing assembly, 5-displacement sensor bracket, 6-displacement sensor, 7-drive gear A, 8-seal end cap, 9-ball thrust bearing, 10-packing gland, 11-seal main shaft, 12-drive gear B, 13-motor output shaft, 14-motor, 15-control unit
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
The embodiment provides an automatic packing sealing device that compresses tightly, and the theory of operation of this device is through motor drive transmission pinion (i.e. drive gear B12) and transmission gear wheel (i.e. drive gear A7) circumference rotation, converts into the axial motion of transmission gear wheel on the sealed end cover to through ball thrust bearing with axial motion transmission to the gland, realize compressing tightly or loosening work to the filler, this process need not manual operation, and transfer mechanism is simple, and the reliability is high.
As shown in fig. 2, the automatic packing apparatus is sleeved outside the main sealing shaft 11, and includes: the device comprises a sealing structure, a compression transmission mechanism and a detection mechanism; wherein the sealing structure comprises a sealing shell 2, a sealing filler assembly 4 and a sealing end cover 8; the compaction transmission mechanism comprises: a transmission gear A7, a transmission gear B12, a packing gland 10 and a motor 14; the detection mechanism includes a temperature sensor 3, a displacement sensor 6, and a control unit 15.
The connection relation is as follows: the seal housing 2 is coupled to the pressure bulkhead by bolts, the seal end cover 8 is fixedly connected with the seal housing 2 into a whole by bolts, and the outboard seawater 1 enters the cavity formed by the seal housing 2 and the seal end cover 8 through the pressure bulkhead opening. The sealing end cover 8 is sleeved on the sealing main shaft 11, the sealing filler component 4 is placed in the annular space between the inner circumferential surface of the sealing main shaft 11 and the outer circumferential surface of the sealing main shaft, one end, opposite to the outboard seawater 1, of the sealing filler component 4 is abutted against the inner bottom surface of the sealing end cover 8, a through hole in the inner bottom surface of the sealing end cover 8 is tightly attached to the sealing main shaft 11, the other end is opposite to the compression transmission mechanism, the sealing main shaft 11 is sealed in an end-to-end mode through the sealing filler component 4, and the outboard seawater 1 is prevented from entering the cabin.
The packing assembly 4 is pressed or loosened by the packing gland 10, specifically: the diameter of the packing gland 10 is matched with the diameter of the inner hole of the sealing end cover 8, and the packing gland 10 can flexibly and axially move in the inner hole of the sealing end cover 8 through the arrangement of the matching tolerance so as to compress or relax the sealing packing assembly 4. The outer circle of the sealing end cover 8 is provided with external threads which are screwed with the internal threads of the inner hole of the transmission gear A7. The motor output shaft 13 of the motor 14 is coaxially connected with the transmission gear B12, and the transmission gear B12 is meshed with the transmission gear A7. A ball thrust bearing 9 is arranged between the transmission gear A7 and the packing gland 10, the ball thrust bearing 9 rotates under the drive of the transmission gear A7 on one hand, and on the other hand, axial force generated by axial displacement of the transmission gear A7 is transmitted to the packing gland 10, and the packing gland 10 realizes movement in the axial direction under the action of the axial force.
The working principle of the compression transmission mechanism is as follows: the motor 14 drives the transmission gear B12 to rotate through the motor output shaft 13, the transmission gear B12 drives and meshes with the rotation of the transmission gear A7, because the inner hole inner thread of the transmission gear A7 is screwed on the outer thread of the outer circle of the sealing end cover 8, axial movement can be realized on the sealing end cover 8 under the action of the thread when the transmission gear A7 rotates circumferentially, and when the transmission gear A7 moves axially, the ball thrust bearing 9 pushes the packing gland 10 to move axially, so that the packing assembly 4 is pressed or loosened.
A temperature sensor hole for installing a temperature sensor 3 is formed in the position where the sealing end cover 8 is used for placing the sealing filler assembly 4, and the temperature sensor 3 is used for monitoring the temperature of the sealing filler assembly 4; the displacement sensor bracket 5 is arranged on the end face of the sealing end cover 8 through bolts, the displacement sensor 6 is arranged on the displacement sensor bracket 5, the measuring end corresponds to the stern end face of the transmission gear A7, and the axial displacement value is measured. The measured values of the temperature sensor 3 and the displacement sensor 6 are transmitted to the control unit 15, meanwhile, the rotation of the motor is controlled by the control unit 15, and the curve relation between the temperature change and the displacement and the temperature range of the sealing packing assembly 4 in the normal compression state are preset in the control unit 15, namely, when the temperature of the sealing packing assembly 4 is in the temperature range, the sealing packing assembly is in the normal compression state; when the packing assembly 4 is excessively tightened or loosened (the temperature thereof is changed due to the change of the friction force), the measured value of the temperature sensor 3 is deviated from the predetermined temperature range inside the control unit 15, and the control unit calculates the temperature variation amount required for the packing assembly 4 to be restored to the normal compressed state according to the current temperature and the predetermined temperature range and converts the temperature variation amount into the displacement amount (the displacement amount is a vector) of the transmission gear A7 through the curve relationship between the temperature variation and the displacement amount inside thereof; then the control unit 15 automatically drives the motor 14 to rotate according to the displacement, so as to push the packing gland 10 to axially move; during the axial movement of the transmission gear A7 pushing the packing gland 10 through the ball thrust bearing 9, the displacement sensor 6 synchronously detects the displacement of the transmission gear A7, and when it reaches the displacement amount obtained after conversion, the control unit 15 controls the motor 14 to stop rotating.
In summary, the above embodiments are only preferred embodiments of the present invention, and are not intended to limit the scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (1)
1. An automatic compression packing seal apparatus comprising: a packing sealing structure and a compression transmission mechanism; the packing sealing structure comprises a sealing shell (2), a sealing packing assembly (4) and a sealing end cover (8); the compression transmission mechanism is used for compressing or loosening the sealing filler assembly (4);
the device is characterized in that the compression transmission mechanism comprises: a transmission gear A (7), a transmission gear B (12), a packing gland (10) and a motor (14);
one end of the packing gland (10) is positioned in the central hole of the sealing end cover (8) and opposite to the sealing packing assembly (4), and the packing gland (10) can axially move in the central hole of the sealing end cover (8); the sealing end cover (8) is screwed with the internal thread of the inner hole of the transmission gear A (7) through the external thread on the outer circumferential surface of the sealing end cover; a motor output shaft (13) of the motor (14) is coaxially connected with a transmission gear B (12), and the transmission gear B (12) is meshed with the transmission gear A (7); a ball thrust bearing (9) is arranged between the other end of the packing gland (10) and the transmission gear A (7);
further comprises: a detection mechanism, the detection mechanism comprising: a temperature sensor (3), a displacement sensor (6) and a control unit (15); the temperature sensor (3) is used for monitoring the temperature of the sealing filler assembly (4); the displacement sensor (6) is used for measuring the axial displacement of the transmission gear A (7); the measured values of the temperature sensor (3) and the displacement sensor (6) are transmitted to the control unit (15), and the rotation of the motor (14) is controlled by the control unit (15);
the inside of the control unit (15) is preset with a curve relation between the temperature change of the sealing filler assembly (4) and the axial displacement of the transmission gear A (7) and the temperature range of the sealing filler assembly (4) in a normal compression state; when the measured temperature value of the temperature sensor (3) exceeds a preset temperature range in a control unit (15), the control unit calculates the temperature variation required by the packing seal assembly (4) to recover to a normal compression state according to the current temperature, and converts the temperature variation into the displacement of the transmission gear A (7) through the curve relationship between the temperature variation of the packing seal assembly (4) in the packing seal assembly and the axial displacement of the transmission gear A (7); then the control unit (15) automatically controls the motor (14) to rotate according to the displacement, so that the ball thrust bearing (9) pushes the packing gland (10) to axially move, in the process, the displacement sensor (6) measures the displacement of the transmission gear A (7) in real time, and when the displacement sensor reaches the displacement obtained after conversion, the control unit (15) controls the motor (14) to stop rotating;
a temperature sensor mounting hole is formed in the position, where the sealing end cover (8) is used for placing the sealing filler component (4), and a temperature sensor (3) used for monitoring the temperature of the sealing filler component (4) is positioned in the temperature sensor mounting hole;
a displacement sensor bracket (5) is fixedly connected to the sealing end cover (8), the displacement sensor (6) is arranged on the displacement sensor bracket (5), and the measuring end of the displacement sensor is opposite to the end face of the side of the transmission gear A (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811340923.6A CN109340378B (en) | 2018-11-12 | 2018-11-12 | Automatic packing sealing device compresses tightly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811340923.6A CN109340378B (en) | 2018-11-12 | 2018-11-12 | Automatic packing sealing device compresses tightly |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109340378A CN109340378A (en) | 2019-02-15 |
| CN109340378B true CN109340378B (en) | 2023-12-01 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811340923.6A Active CN109340378B (en) | 2018-11-12 | 2018-11-12 | Automatic packing sealing device compresses tightly |
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| Country | Link |
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| CN (1) | CN109340378B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111271459B (en) * | 2020-03-27 | 2022-07-01 | 中国铁建重工集团股份有限公司 | Device and method for controlling sealing compression amount and readable storage medium |
| CN111550557A (en) * | 2020-05-11 | 2020-08-18 | 山东省章丘鼓风机股份有限公司 | Electric compression packing sealing device and control method thereof |
| CN112343811B (en) * | 2020-11-06 | 2022-04-05 | 常州拓川泵业科技有限公司 | Plunger metering pump packing compact structure |
| CN114370504A (en) * | 2021-12-13 | 2022-04-19 | 中国船舶重工集团公司第七一九研究所 | Manual-automatic integrated pneumatic transmission device for sealing |
| CN115638105B (en) * | 2022-12-24 | 2023-04-11 | 合肥皖液液压元件有限公司 | Gear pump capable of improving axial force balance |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0131286A2 (en) * | 1983-07-08 | 1985-01-16 | Tanken Seiko Corporation | Mechanical seal for sealing slurry liquid |
| WO1994028336A1 (en) * | 1993-06-01 | 1994-12-08 | Amtec Advanced Measurement, Messtechnischer Service Gmbh | Process and device for the controlled compression of stuffing box or seal packings |
| DE4411613A1 (en) * | 1994-04-02 | 1995-10-05 | Otte Peter | Stuffing box packing for sealing housing and spindle |
| DE29614077U1 (en) * | 1996-08-15 | 1996-09-26 | Stihl Maschf Andreas | Tank cap for a filler neck of a container |
| CN1274817A (en) * | 1999-05-24 | 2000-11-29 | 崔正仁 | High-pressure sealing stuffing for magnetic suspending reciprocating compressor |
| CA2547181A1 (en) * | 2006-03-01 | 2007-09-01 | Yano-Tech Inc. | Seal device |
| CN201003611Y (en) * | 2006-12-21 | 2008-01-09 | 中国船舶重工集团公司第七一九研究所 | Pneumatic remote-controlled filler sealing device |
| JP2008286357A (en) * | 2007-05-21 | 2008-11-27 | Sumitomo Heavy Ind Ltd | Sealing mechanism and power transmission device provided with same |
| CN105972217A (en) * | 2016-07-26 | 2016-09-28 | 中国舰船研究设计中心 | Servo-type stern shaft tube emergency sealing device for submersible vehicle |
| CN107444602A (en) * | 2017-08-25 | 2017-12-08 | 中国船舶重工集团公司第七〇九研究所 | A kind of ship stern propulsion plant based on magnetic drives |
-
2018
- 2018-11-12 CN CN201811340923.6A patent/CN109340378B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0131286A2 (en) * | 1983-07-08 | 1985-01-16 | Tanken Seiko Corporation | Mechanical seal for sealing slurry liquid |
| WO1994028336A1 (en) * | 1993-06-01 | 1994-12-08 | Amtec Advanced Measurement, Messtechnischer Service Gmbh | Process and device for the controlled compression of stuffing box or seal packings |
| DE4411613A1 (en) * | 1994-04-02 | 1995-10-05 | Otte Peter | Stuffing box packing for sealing housing and spindle |
| DE29614077U1 (en) * | 1996-08-15 | 1996-09-26 | Stihl Maschf Andreas | Tank cap for a filler neck of a container |
| CN1274817A (en) * | 1999-05-24 | 2000-11-29 | 崔正仁 | High-pressure sealing stuffing for magnetic suspending reciprocating compressor |
| CA2547181A1 (en) * | 2006-03-01 | 2007-09-01 | Yano-Tech Inc. | Seal device |
| CN201003611Y (en) * | 2006-12-21 | 2008-01-09 | 中国船舶重工集团公司第七一九研究所 | Pneumatic remote-controlled filler sealing device |
| JP2008286357A (en) * | 2007-05-21 | 2008-11-27 | Sumitomo Heavy Ind Ltd | Sealing mechanism and power transmission device provided with same |
| CN105972217A (en) * | 2016-07-26 | 2016-09-28 | 中国舰船研究设计中心 | Servo-type stern shaft tube emergency sealing device for submersible vehicle |
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| CN109340378A (en) | 2019-02-15 |
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