CN110953345A - Method for lubricating and self-compensating high-pressure seal - Google Patents
Method for lubricating and self-compensating high-pressure seal Download PDFInfo
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- CN110953345A CN110953345A CN201911204126.XA CN201911204126A CN110953345A CN 110953345 A CN110953345 A CN 110953345A CN 201911204126 A CN201911204126 A CN 201911204126A CN 110953345 A CN110953345 A CN 110953345A
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- oil
- lubricating
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- seal
- lubricating oil
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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
- F16J15/162—Special parts or details relating to lubrication or cooling of the sealing itself
Abstract
The invention discloses a method for lubricating and self-compensating a high-pressure seal, and belongs to the technical field of air sealing of energy accumulators. The method utilizes the self-compensating device to establish back pressure, then automatically injects lubricating oil between the sealing surfaces needing to be lubricated and automatically compensates the lubricating oil, and ensures that sufficient lubricating oil is always reserved between the lubricating surfaces; the self-compensating device is arranged inside or outside the equipment needing lubrication. The invention can always keep the sealing surfaces filled with lubricating oil, well lubricate the sealing, the method is simple and easy to implement, and the sealing structure can be implemented only by slightly improving.
Description
Technical Field
The invention belongs to the technical field of air sealing of energy accumulators, and particularly relates to a device for lubricating and self-compensating a high-pressure seal.
Background
The rocker arm suspension and the air spring are key devices of the high-mobility high-trafficability platform, and the shoulder provides the functions of supporting the weight of a vehicle body, buffering and damping for the platform. Accumulators in rocker arm suspensions, air springs are key components to achieve these functions. The air seal of the energy accumulator is easy to damage in the process of bench test and real vehicle test, and the energy accumulator leaks air, so that the vehicle posture is further abnormal, the vibration damping performance of the platform is poor, the smoothness is poor and the like. Through analysis, the gas seal in the energy accumulator is easy to damage and is caused by the fact that a good and stable lubricating oil film cannot be formed due to the fact that the gas seal is lack of lubricating oil when the suspension works.
Disclosure of Invention
In view of the above, the present invention provides a method for lubricating a high-pressure seal with self-compensation, which can improve the lubricating effect of the seal and prolong the service life of the seal.
A method for lubricating and self-compensating a high-pressure seal utilizes a self-compensating device to establish back pressure, then automatically injects lubricating oil between sealing surfaces needing to be lubricated and automatically compensates the lubricating oil, and ensures that sufficient lubricating oil is always reserved between the lubricating surfaces; the self-compensating device is arranged inside or outside the equipment needing lubrication.
Furthermore, the self-compensating device comprises an inflation valve, an oil storage cylinder, a piston, an oil supplementing pipeline, a sealing cover and a connecting device accessory;
the piston is positioned in the oil storage cylinder and reciprocates in the oil storage cylinder, and simultaneously separates oil and gas in the oil storage cylinder; the side of the oil storage cylinder with oil is welded with the inlet end of the oil supplementing pipeline, and the outlet end of the oil supplementing pipeline is connected with the sealing cover through a connecting device accessory; an oil supplementing channel is processed in the sealing cover, the outlet end of the oil supplementing pipeline is communicated with the oil supplementing channel, the oil supplementing channel is communicated between an air seal and a dust ring on the sealing cover, nitrogen gas with certain pressure is pre-charged in the inflation valve to establish back pressure to push a piston, lubricating oil is pushed to the sealing surfaces all the time, and real-time compensation is achieved for the lubricating oil between the sealing surfaces.
Further, the inflation valve is replaced by a coil spring, the coil spring is used for establishing back pressure, and the coil spring is arranged on a coil spring attachment seat and applies force for generating the back pressure to the piston.
Further, the self-compensating device improves the traditional floating piston, and an oil blocking plug, an elastic retainer ring and a seal are arranged in the floating piston; lubricating oil and high-pressure nitrogen which are sealed in advance are respectively arranged on two sides of the oil blocking plug, a seal for separating oil and gas on two sides is arranged on the oil blocking plug, and the oil blocking plug is axially limited by an elastic retainer ring; two radial through holes which are uniformly distributed in the circumferential direction are formed in the floating piston, and the lubricating oil is guided to a position between the Stent seal and the air seal by the radial through holes; when the energy accumulator works, the high-pressure nitrogen on one side of the oil blocking plug transmits pressure to the lubricating oil through the oil blocking plug, and the lubricating oil is always injected between the Stent seal and the gas seal as backpressure, so that enough lubricating oil is ensured to form a lubricating oil film.
Has the advantages that:
the self-compensating method for lubrication firstly establishes back pressure with certain pressure, and then pushes the piston by utilizing the back pressure to push the lubricating oil into the sealing surfaces needing lubrication. Lubricating oil can run off a little when using, and lubricating oil compensates a little under the effect of backpressure, keeps being full of lubricating oil between the sealed face all the time, can be fine lubricate sealed. The method is simple and easy to implement, and can be implemented only by slightly improving the sealing structure.
Drawings
FIG. 1 is an overall structural view of a lubricating self-compensating apparatus for an accumulator according to the present invention;
FIG. 2 is an enlarged view of a portion of the lubricated self-compensating device for an accumulator of the present invention;
FIG. 3 is a schematic diagram of the self-compensating lubrication device for an accumulator of the present invention using a coil spring to establish back pressure;
fig. 4 is a schematic view illustrating the piston of the lubricating self-compensating apparatus for an accumulator according to the present invention improving the air-tight effect.
The device comprises a gas charging valve 1, a nitrogen gas 2, a piston 3, an oil storage cylinder 4, a lubricating oil 5, an oil supplementing pipeline 6, a connecting device accessory 7, a sealing cover 8, a dust ring 9, an oil supplementing channel 10, an air seal 11, an elastic check ring 12, an oil seal 13, an oil stop plug 14, an air seal 15, a radial through hole 16, a Stent seal 17, a floating piston 18, a lubricating oil 19, a high-pressure nitrogen gas 20, a spiral spring 21 and a spiral spring auxiliary seat 22.
Detailed Description
The invention is described in detail below by way of example with reference to the accompanying drawings.
As shown in fig. 1, the present invention provides a method for self-compensating lubrication of a high-pressure seal, which automatically injects lubrication oil between seal faces to be lubricated by using an established back pressure and automatically compensates the lubrication oil, thereby ensuring that a sufficient amount of lubrication oil is always reserved between the lubrication faces.
The method has two embodiments, in the first embodiment, as shown in fig. 1 and 2, an oil storage cylinder 4 and an energy accumulator cylinder are fixed together, a piston 3 is positioned in the oil storage cylinder 4, nitrogen gas 2 with certain pressure is pre-charged on one side of the piston 3, a certain amount of lubricating oil 5 is pre-stored on the other side, and the lubricating oil 5 is communicated between a dust ring 9 and an air seal 11 through an oil supplementing pipeline 6 and an oil supplementing channel 10 on a sealing cover 8. Because there is pressure in the gas in the oil storage cylinder 4, the pressure of gas passes through piston 3 and pushes lubricating oil 5 between dust ring 9 and the gas seal 11, can run off some in the lubricating oil use, and the lubricating oil in the oil storage cylinder comes under the effect of pressure automatic compensation, will keep all the time sealed face to be full of lubricating oil between, can effectively improve sealed lubricated effect.
One side of the piston 3 can also replace the nitrogen gas with a coil spring 21, and the back pressure is established by the coil spring 21, and at the moment, the inflation valve is eliminated, and the coil spring 21 is installed on a coil spring attachment seat 22, as shown in figure 3.
As shown in fig. 4, in the second embodiment, an oil blocking plug 14 is disposed inside a floating piston 18, a certain amount of lubricating oil 19 is pre-stored between the oil blocking plug 14 and the floating piston 18, the oil blocking plug 14 is limited by a circlip 12 for hole, the oil blocking plug 14 is prevented from coming off, the lubricating oil 19 is pushed into a sealing surface between a steiner 17 and a gas seal 15 by using back pressure generated by high-pressure gas 20 in an energy accumulator, sufficient lubricating oil is always ensured to be stored between the sealing surfaces, and the sealing effect of the gas seal can be greatly improved.
In summary, the above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. 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 (4)
1. A method for lubricating and self-compensating a high-pressure seal is characterized in that a self-compensating device is used for building backpressure, then lubricating oil is automatically injected between sealing surfaces needing to be lubricated, and the lubricating oil is automatically compensated, so that sufficient lubricating oil is always reserved between the lubricating surfaces; the self-compensating device is arranged inside or outside the equipment needing lubrication.
2. The method of lubricating self-compensation for high pressure seals of claim 1 wherein the self-compensation device comprises a charge valve, a reservoir, a piston, a charge line, a seal cap and a connector attachment;
the piston is positioned in the oil storage cylinder and reciprocates in the oil storage cylinder, and simultaneously separates oil and gas in the oil storage cylinder; the side of the oil storage cylinder with oil is welded with the inlet end of the oil supplementing pipeline, and the outlet end of the oil supplementing pipeline is connected with the sealing cover through a connecting device accessory; an oil supplementing channel is processed in the sealing cover, the outlet end of the oil supplementing pipeline is communicated with the oil supplementing channel, the oil supplementing channel is communicated between an air seal and a dust ring on the sealing cover, nitrogen gas with certain pressure is pre-charged in the inflation valve to establish back pressure to push a piston, lubricating oil is pushed to the sealing surfaces all the time, and real-time compensation is achieved for the lubricating oil between the sealing surfaces.
3. The method of claim 2, wherein the charge valve is replaced with a coil spring, and the back pressure is established by a coil spring mounted on a coil spring seat that applies a force to the piston that generates the back pressure.
4. The method for lubricating and self-compensating a high-pressure seal according to claim 1, wherein the self-compensating device is modified from a conventional floating piston, and an oil stopper, a circlip and a seal are arranged in the floating piston; lubricating oil and high-pressure nitrogen which are sealed in advance are respectively arranged on two sides of the oil blocking plug, a seal for separating oil and gas on two sides is arranged on the oil blocking plug, and the oil blocking plug is axially limited by an elastic retainer ring; two radial through holes which are uniformly distributed in the circumferential direction are formed in the floating piston, and the lubricating oil is guided to a position between the Stent seal and the air seal by the radial through holes; when the energy accumulator works, the high-pressure nitrogen on one side of the oil blocking plug transmits pressure to the lubricating oil through the oil blocking plug, and the lubricating oil is always injected between the Stent seal and the gas seal as backpressure, so that enough lubricating oil is ensured to form a lubricating oil film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911204126.XA CN110953345A (en) | 2019-11-29 | 2019-11-29 | Method for lubricating and self-compensating high-pressure seal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911204126.XA CN110953345A (en) | 2019-11-29 | 2019-11-29 | Method for lubricating and self-compensating high-pressure seal |
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| Publication Number | Publication Date |
|---|---|
| CN110953345A true CN110953345A (en) | 2020-04-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911204126.XA Pending CN110953345A (en) | 2019-11-29 | 2019-11-29 | Method for lubricating and self-compensating high-pressure seal |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB189611408A (en) * | 1896-05-26 | 1896-10-24 | James Brackenbury Davis | Improvements in and relating to Stuffing Boxes and the Means of Lubricating the same. |
| US5305854A (en) * | 1991-09-20 | 1994-04-26 | The Texacone Company | Stuffing box lubricator |
| JPH11173361A (en) * | 1997-12-11 | 1999-06-29 | Showa Corp | Oil seal friction variable hydraulic shock absorber |
| CN1392818A (en) * | 2000-09-18 | 2003-01-22 | 帕斯卡株式会社 | Spindle balancer for machine tool |
| CN2556458Y (en) * | 2002-03-28 | 2003-06-18 | 王泉琦 | Pressure lubricating oil cup |
| CN106838096A (en) * | 2017-03-24 | 2017-06-13 | 中国北方车辆研究所 | Hydro-pneumatic spring self-lubricating compensates floating piston |
| CN107939890A (en) * | 2017-11-28 | 2018-04-20 | 汪平和 | A kind of gas spring piston component sealing structure |
| CN109668040A (en) * | 2019-01-08 | 2019-04-23 | 深圳大学 | Air pressure electronics installs lube plant additional to one kind automatically at regular time and quantity |
-
2019
- 2019-11-29 CN CN201911204126.XA patent/CN110953345A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB189611408A (en) * | 1896-05-26 | 1896-10-24 | James Brackenbury Davis | Improvements in and relating to Stuffing Boxes and the Means of Lubricating the same. |
| US5305854A (en) * | 1991-09-20 | 1994-04-26 | The Texacone Company | Stuffing box lubricator |
| JPH11173361A (en) * | 1997-12-11 | 1999-06-29 | Showa Corp | Oil seal friction variable hydraulic shock absorber |
| CN1392818A (en) * | 2000-09-18 | 2003-01-22 | 帕斯卡株式会社 | Spindle balancer for machine tool |
| CN2556458Y (en) * | 2002-03-28 | 2003-06-18 | 王泉琦 | Pressure lubricating oil cup |
| CN106838096A (en) * | 2017-03-24 | 2017-06-13 | 中国北方车辆研究所 | Hydro-pneumatic spring self-lubricating compensates floating piston |
| CN107939890A (en) * | 2017-11-28 | 2018-04-20 | 汪平和 | A kind of gas spring piston component sealing structure |
| CN109668040A (en) * | 2019-01-08 | 2019-04-23 | 深圳大学 | Air pressure electronics installs lube plant additional to one kind automatically at regular time and quantity |
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Application publication date: 20200403 |
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