CN111550557A - Electric compression packing sealing device and control method thereof - Google Patents
Electric compression packing sealing device and control method thereof Download PDFInfo
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- CN111550557A CN111550557A CN202010391868.4A CN202010391868A CN111550557A CN 111550557 A CN111550557 A CN 111550557A CN 202010391868 A CN202010391868 A CN 202010391868A CN 111550557 A CN111550557 A CN 111550557A
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- packing
- oil
- sealing
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- plunger
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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
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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
- F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
- F16J15/3296—Arrangements for monitoring the condition or operation of elastic sealings; Arrangements for control of elastic sealings, e.g. of their geometry or stiffness
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sealing Devices (AREA)
Abstract
An electric compression packing sealing device and a control method thereof are provided, wherein a shaft sleeve is sleeved outside a rotating shaft, and packing is arranged between the shaft sleeve and a packing cylinder; the packing is provided with oil sealing rings arranged at intervals, the oil sealing rings are connected through springs, an electric plunger is arranged outside the packing cylinder corresponding to the oil sealing rings, the electric plunger extrudes oil and the packing along the radial action of the packing cylinder, and a sensor for monitoring leakage and transmitting a monitoring signal to the electric plunger is arranged between the sealing end cover and the sleeve. The sensor transmits signals to the electric plunger in real time, and the friction resistance between the electric compression packing sealing device and the rotating shaft is kept to be minimum and leakage is avoided all the time by controlling the position of the electric plunger, so that the consumption of packing and the friction of the rotating shaft are reduced, and the service life of packing sealing is prolonged.
Description
Technical Field
The invention relates to the technical field of mechanical engineering sealing, in particular to an electric compression packing sealing device and a control method thereof.
Background
The application of the slurry pump is very wide, and the axial sealing technology of a rotating shaft of the slurry pump is a key part of the pump. The leakage of the slurry pump liquid can not only cause waste, but also pollute the environment and cause certain threats to the equipment operation and personal safety. Therefore, the sealing performance of the slurry pump is an important index for evaluating the slurry pump. The packing seal has low cost, simple structure and convenient use, and is widely applied to dynamic seals of various fluid machines. The traditional packing sealing structure has no automatic compensation compression effect, and after the packing is worn, the leakage amount is gradually increased, so that the gland bolt needs to be frequently screwed. The labor intensity of manual packing is high, and if the packing is not tightened in time, liquid leakage and environmental pollution can be caused.
Chinese patent application No. CN206830806U proposes an automatic pressing device for packing seal, which applies a certain pressing force to the packing through a spring device all the time to promote the packing to fill the radial space and provide sealing, thereby avoiding leakage of the medium. However, the ability to compensate for the filler by means of a spring is relatively weak, the compensation effect will gradually fail, and the compensation process is non-active and non-linear.
Disclosure of Invention
In order to overcome the problems in the prior art, the invention provides an electric compression packing sealing device and a control method thereof.
The technical scheme adopted by the invention for solving the technical problems is as follows: the electric compression packing sealing device is characterized in that a shaft sleeve is sleeved outside a rotating shaft, packing is arranged between the shaft sleeve and a packing cylinder, and two ends of the packing cylinder are respectively connected with a sealing end cover and a pump body rear end cover; the packing is provided with oil sealing rings arranged at intervals, the oil sealing rings are connected through springs, an electric plunger is arranged outside the packing cylinder corresponding to the oil sealing rings, the electric plunger extrudes oil and the packing along the radial action of the packing cylinder, and a sensor for monitoring leakage and transmitting a monitoring signal to the electric plunger is arranged between the sealing end cover and the sleeve.
Furthermore, an oil groove is formed in the radial direction of the packing cylinder, an electric plunger is mounted outside the packing cylinder, the tail end of the electric plunger is connected with the piston and then placed in the oil groove, and the electric plunger drives the piston to extrude oil in the oil groove.
Furthermore, two oil seal rings are arranged and located between the fillers, a gap is formed between the two oil seal rings, the position of the gap corresponds to the position of an oil groove in the filler cylinder, and the two oil seal rings are connected through a spring.
Furthermore, a groove is formed in the inner circumferential wall of the sealing end cover, the opening of the groove faces the shaft sleeve, and a sensor for monitoring leakage and transmitting a monitoring signal to the electric plunger is installed in the groove.
Furthermore, the sealing end cover is in a step shape, a boss is arranged on one side of the sealing end cover and is arranged between the packing cylinder and the shaft sleeve, and the sealing end cover and the rear end cover of the pump body are in direct contact with packing and compress the packing.
Furthermore, two ends of the packing cylinder are respectively connected with the sealing end cover and the rear end cover of the pump body through screws.
Further, a sealing ring is arranged between the sealing end cover and the shaft sleeve.
A method for controlling axial leakage liquid, in the working process of a slurry pump, when a rotating shaft rotates, a liquid sensor monitors a leakage signal and transmits the signal to a control end of an electric plunger, the electric plunger drives a piston to extrude oil liquid in an oil groove, the oil liquid transmits pressure to an oil seal ring, and the oil seal ring axially extrudes a filler to enable the filler to be filled at a radial distance from the rotating shaft; when the sensor monitors that the rotating shaft has no axial leakage, the electric plunger stops moving; when the slurry pump stops working and does not need axial sealing, the electric plunger piston does return stroke movement, the oil sealing ring retracts under the action of spring tension, the extrusion of the oil sealing ring on the filler is reduced, and the radial distance between the filler and the rotating shaft returns to the initial state.
In summary, the technical scheme of the invention has the following beneficial effects:
(1) the oil leakage condition is detected through the sensor, the axial sealing is automatically controlled actively according to the axial sealing condition of the slurry pump, the power of the electric plunger driving the piston to extrude the oil is controlled according to the leakage, the linear compensation of the filler is realized, and the leakage of the solution of the slurry pump is avoided.
(2) The axial sealing effect is guaranteed, meanwhile, the filler is not excessively extruded, the friction resistance between the electric compression filler sealing device and the rotating shaft is kept to be the minimum, the consumption of the filler and the friction of the rotating shaft are reduced, and the service life of the filler seal is prolonged.
Drawings
FIG. 1 is a schematic view of the structure of the present invention.
1-sealing end cover, 2-sensor, 3-filling cylinder, 4-electric plunger, 5-piston, 6-oil sealing ring, 7-screw, 8-pump body rear end cover, 9-shaft sleeve, 10-rotating shaft, 11-spring, 12-filling and 13-sealing ring.
Detailed Description
The invention will be further described with reference to the following figures and specific examples, but the scope of the invention is not limited thereto.
The electric compression packing sealing device shown in fig. 1 comprises a sealing end cover 1, a liquid sensor 2, a packing cylinder 3, an electric plunger 4, a piston 5, an oil seal ring 6, a screw 7, a pump body rear end cover 8, a shaft sleeve 9, a rotating shaft 10, a spring 11, a packing 12 and a sealing ring 13.
The shaft sleeve 9 is sleeved outside the rotating shaft 10 and is in interference fit with the rotating shaft 10. The shaft sleeve is in clearance fit with the inner diameter of the rear end cover of the pump body. The packing cylinder 3 is connected to a pump body rear end cover 8 through a screw 7, an electric plunger 4 is installed outside the packing cylinder 3, and a packing 12, an oil seal ring 6 and a spring 11 are installed inside the packing cylinder 3. The filler 12 is made of asbestos fabric, carbon fiber, rubber, flexible graphite, engineering plastic and the like, is prefabricated into an annular structure, and is sleeved outside the shaft sleeve.
A sealing ring 13 is arranged between the sealing end cover 1 and the shaft sleeve 9.
The sealing end cover 1 is in a step shape, a boss is arranged on one side of the sealing end cover and is arranged between the packing cylinder and the shaft sleeve, and the sealing end cover and the rear end cover of the pump body are in direct contact with packing and compress the packing 12. The sealing end cover 1 is fixedly connected with the packing cylinder through a screw 7.
The end cap 1 is provided with a groove, the opening of which points to the rotating shaft 10. The sensor 2 for monitoring leakage and transmitting a monitoring signal to the electric plunger is positioned in the groove of the sealing end cover 1 and is used for monitoring axial leakage of the rotating shaft 10. The oil leakage condition is detected through the sensor, the axial sealing is automatically controlled actively according to the axial sealing condition of the slurry pump, the power of the electric plunger driving the piston to extrude the oil is controlled according to the leakage, the linear compensation of the filler is realized, and the leakage of the solution of the slurry pump is avoided.
The oil seal ring 6 is positioned in the middle of the filler 12, and the two oil seal rings 6 are connected by a spring 11 in the middle. And a gap is formed between the two oil sealing rings, and the position of the gap corresponds to the position of an oil groove on the packing cylinder.
The packing cylinder 3 is provided with a radial oil groove, oil is injected into the radial oil groove, and the piston 5 is positioned in the radial oil groove and is in interference fit with the radial oil groove.
The electric plunger 4 is fixed on the filling cylinder 3, and the tail end of the electric plunger 4 is connected with the piston 5. The tail end of the electric plunger is the tail end of a rod piece, the control end of the electric plunger can be a controller, and the controller controls the electric plunger to act after receiving a monitoring signal (with axial leakage) of the sensor 2.
The control method comprises the following steps:
in the sediment stuff pump working process, when there is axial leakage in rotation axis 10, liquid sensor 2 monitors the control end of revealing the signal and transmitting the signal for electronic plunger 4, and control end control electronic plunger 4 is radial motion along the packing section of thick bamboo and makes the fluid in the piston 5 extrusion oil groove, and then gives oil-sealing ring 6 pressure transfer, carries out axial extrusion to packing 12, impels packing 12 to pack with the radial interval of rotation axis 10 and improve sealed effect.
When the liquid sensor 2 detects that the rotating shaft 10 has no axial leakage, the electric plunger 4 stops moving.
When the slurry pump stops working and does not need axial sealing, the electric plunger 4 moves in a return stroke, the oil sealing ring 6 retracts under the action of the tension of the spring 11, the extrusion of the oil sealing ring 6 on the filler 12 is reduced, and the radial distance between the filler 12 and the rotating shaft 10 returns to the initial state.
The electric plunger 4 automatically controls the sealing filler 12 according to the axial sealing condition of the rotating shaft 10 when the slurry pump works next time, so that the leakage of the solution of the slurry pump is zero, the friction resistance between the electric compression filler sealing device and the rotating shaft 10 is kept to be minimum all the time, the consumption of the filler 12 and the friction of the rotating shaft 10 are reduced, and the service life of the filler sealing is prolonged.
The invention ensures the axial sealing effect and simultaneously prevents the filler from being excessively extruded, keeps the friction resistance between the electric compression filler sealing device and the rotating shaft to be minimum, reduces the consumption of the filler and the friction of the rotating shaft, and prolongs the service life of the filler seal.
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any obvious improvements, substitutions or modifications can be made by those skilled in the art without departing from the spirit of the present invention.
Claims (8)
1. An electric compression packing sealing device is characterized in that two ends of a packing cylinder are respectively connected with a sealing end cover and a pump body rear end cover; the packing is provided with oil sealing rings arranged at intervals, the oil sealing rings are connected through springs, an electric plunger is arranged outside the packing cylinder corresponding to the oil sealing rings, the electric plunger extrudes oil and the packing along the radial action of the packing cylinder, and a sensor for monitoring leakage and transmitting a monitoring signal to the electric plunger is arranged between the sealing end cover and the sleeve.
2. The electric compression packing sealing device as claimed in claim 1, wherein the packing cylinder is radially provided with an oil groove, an electric plunger is arranged outside the packing cylinder, the end of the electric plunger is connected with the piston and then placed in the oil groove, and the electric plunger drives the piston to squeeze oil in the oil groove.
3. The electrical compression packing seal device as claimed in claim 2, wherein two oil seal rings are provided, the two oil seal rings are located between the packing, a space is provided between the two oil seal rings, the space is located at a position corresponding to an oil groove on the packing cylinder, and the two oil seal rings are connected by a spring.
4. The electrical compression packing seal of claim 1, wherein the end cap has a recess in an inner circumferential wall thereof, the recess opening toward the bushing, the recess receiving a leak monitoring sensor for transmitting a leak signal to the electrical plunger.
5. The electric packing pressing and sealing device as claimed in claim 1, wherein the sealing end cap is stepped, a boss is arranged on one side of the sealing end cap, the boss is arranged between the packing cylinder and the shaft sleeve, and the sealing end cap and the rear end cap of the pump body are in direct contact with the packing and press the packing.
6. The electrically-driven packing gland according to claim 1, wherein both ends of said packing cylinder are connected to said gland cover and said rear end cover of said pump body by screws.
7. The electrically powered compression packing seal of claim 1, wherein a seal ring is disposed between said end cap and said bushing.
8. A method for controlling axial leakage, which utilizes the electric compression packing sealing device as claimed in any claim 1-7, characterized in that, during the operation of the slurry pump, when the rotating shaft rotates, the liquid sensor monitors the leakage signal and transmits the signal to the control end of the electric plunger, the electric plunger drives the piston to squeeze the oil in the oil groove, the oil transmits the pressure to the oil seal ring, the oil seal ring axially squeezes the packing, so that the radial distance between the packing and the rotating shaft is filled; when the sensor monitors that the rotating shaft has no axial leakage, the electric plunger stops moving; when the slurry pump stops working and does not need axial sealing, the electric plunger piston does return stroke movement, the oil sealing ring retracts under the action of spring tension, the extrusion of the oil sealing ring on the filler is reduced, and the radial distance between the filler and the rotating shaft returns to the initial state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010391868.4A CN111550557A (en) | 2020-05-11 | 2020-05-11 | Electric compression packing sealing device and control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010391868.4A CN111550557A (en) | 2020-05-11 | 2020-05-11 | Electric compression packing sealing device and control method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN111550557A true CN111550557A (en) | 2020-08-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010391868.4A Pending CN111550557A (en) | 2020-05-11 | 2020-05-11 | Electric compression packing sealing device and control method thereof |
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| CN (1) | CN111550557A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113623399A (en) * | 2021-08-23 | 2021-11-09 | 中国计量大学 | Self-adaptive intelligent rubber sealing device and control method thereof |
| CN113663398A (en) * | 2021-10-21 | 2021-11-19 | 苏州韩博环境科技有限公司 | Separation auxiliary part for dynamic filtering equipment and installation method |
| CN114251324A (en) * | 2021-12-07 | 2022-03-29 | 武汉力地液压设备有限公司 | Hollow hydraulic oil cylinder for preventing riser from being flexibly suspended |
| 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 |
| CN114777844A (en) * | 2022-04-28 | 2022-07-22 | 陈松涛 | Fixed bed gasification furnace detection device and fixed bed gasification furnace detection method |
| CN115638105A (en) * | 2022-12-24 | 2023-01-24 | 合肥皖液液压元件有限公司 | Gear pump capable of improving axial force balance |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1425523A1 (en) * | 1962-04-25 | 1969-05-29 | Nat Res Dev | Shaft seal |
| CN1179798A (en) * | 1995-03-31 | 1998-04-22 | 保罗·沃思股份有限公司 | Device for sealing lance into aperture through which lance can be introduced into pressurized vessel |
| CN203214299U (en) * | 2013-03-14 | 2013-09-25 | 山东硕博泵业有限公司 | Pressure automatic feedback type pump sealing device |
| CN105090509A (en) * | 2015-07-23 | 2015-11-25 | 张兆贵 | Shaft seal |
| CN109340378A (en) * | 2018-11-12 | 2019-02-15 | 中国船舶重工集团公司第七〇九研究所 | A kind of automatic impaction stuffing seal |
| CN209041567U (en) * | 2018-11-27 | 2019-06-28 | 石家庄市永通化工有限公司 | A kind of m-aminophenol production filler box structure |
| CN110195799A (en) * | 2019-06-18 | 2019-09-03 | 中国船舶科学研究中心（中国船舶重工集团公司第七0二研究所） | Valve stem seal monitors compensation and emergency set automatically |
-
2020
- 2020-05-11 CN CN202010391868.4A patent/CN111550557A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1425523A1 (en) * | 1962-04-25 | 1969-05-29 | Nat Res Dev | Shaft seal |
| CN1179798A (en) * | 1995-03-31 | 1998-04-22 | 保罗·沃思股份有限公司 | Device for sealing lance into aperture through which lance can be introduced into pressurized vessel |
| CN203214299U (en) * | 2013-03-14 | 2013-09-25 | 山东硕博泵业有限公司 | Pressure automatic feedback type pump sealing device |
| CN105090509A (en) * | 2015-07-23 | 2015-11-25 | 张兆贵 | Shaft seal |
| CN109340378A (en) * | 2018-11-12 | 2019-02-15 | 中国船舶重工集团公司第七〇九研究所 | A kind of automatic impaction stuffing seal |
| CN209041567U (en) * | 2018-11-27 | 2019-06-28 | 石家庄市永通化工有限公司 | A kind of m-aminophenol production filler box structure |
| CN110195799A (en) * | 2019-06-18 | 2019-09-03 | 中国船舶科学研究中心（中国船舶重工集团公司第七0二研究所） | Valve stem seal monitors compensation and emergency set automatically |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113623399A (en) * | 2021-08-23 | 2021-11-09 | 中国计量大学 | Self-adaptive intelligent rubber sealing device and control method thereof |
| CN113623399B (en) * | 2021-08-23 | 2023-07-14 | 中国计量大学 | Self-adaptive intelligent rubber sealing device and control method thereof |
| CN113663398A (en) * | 2021-10-21 | 2021-11-19 | 苏州韩博环境科技有限公司 | Separation auxiliary part for dynamic filtering equipment and installation method |
| CN114251324A (en) * | 2021-12-07 | 2022-03-29 | 武汉力地液压设备有限公司 | Hollow hydraulic oil cylinder for preventing riser from being flexibly suspended |
| 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 |
| CN114777844A (en) * | 2022-04-28 | 2022-07-22 | 陈松涛 | Fixed bed gasification furnace detection device and fixed bed gasification furnace detection method |
| CN115638105A (en) * | 2022-12-24 | 2023-01-24 | 合肥皖液液压元件有限公司 | Gear pump capable of improving axial force balance |
| 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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| PB01 | Publication | ||
| PB01 | Publication | ||
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Application publication date: 20200818 |