CN201827368U - Double-end face mechanical sealing structure for screw expansion machine - Google Patents
Double-end face mechanical sealing structure for screw expansion machine Download PDFInfo
- Publication number
- CN201827368U CN201827368U CN2010205755240U CN201020575524U CN201827368U CN 201827368 U CN201827368 U CN 201827368U CN 2010205755240 U CN2010205755240 U CN 2010205755240U CN 201020575524 U CN201020575524 U CN 201020575524U CN 201827368 U CN201827368 U CN 201827368U
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- seal box
- ring assembly
- mechanical sealing
- mechanical seal
- double
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Abstract
The utility model relates to a double-end face mechanical sealing structure for a screw expansion machine, which comprises a seal box, a moving ring assembly and static ring assemblies, wherein two sides of the moving ring assembly are respectively provided with a static ring assembly; the moving ring assembly and the static ring assemblies are all arranged in the seal box; spring seats are arranged at the contact parts of the seal box and the static ring assemblies; and springs are arranged in the spring seats. While ensuring the runnability, the double-end face mechanical sealing structure can achieve good sealing effect with zero leakage of working medium, and is low in cost and suitable for popularization and application; as the springs are arranged at a working medium side and a bearing side, by virtue of the elasticity of the springs, the mechanical sealing structure not only can adapt to greater pressure fluctuation, but also can bear greater axially moving torque, thus being adaptive to high pressure and a certain quantity of axial movement; due to the arrangement of a cooling system, when the high-speed screw expansion machine is started and stopped, conventional mechanical sealing can be prevented from being damaged due to dry friction; and the seal box comprises a seal box body formed by the combination of a seal box cover and an outer gland, thus being simple and convenient and fast to install.
Description
Technical field
The utility model relates to a kind of double mechanical seal structure that is used for screw expander.
Background technique
At present, the available dynamic machine, very high as steam turbine to parameter (pressure and temperature) requirement of steam, and very tight to the quality requirements of steam, and it only is applicable to that superheated vapor or less efficiently utilize saturated vapour, because its seal arrangement is to adopt simple and easy seal arrangement.Medium at high temperature and high pressure causes leakage easily, makes the lost of life of screw expander.Therefore, for screw expansion motor, organic media and water vapour must separate with bearing, can cause oil deterioration otherwise the sour gas in the medium enters bearing oil, damage component such as bearing and synchromesh gear.Therefore, must adopt performance, the higher sealing of reliability to intercept poisonous or corrosive medium and lubricant oil and outside leakage between expansion chamber and the bearing.
Summary of the invention
According to above deficiency of the prior art, the technical problems to be solved in the utility model is: a kind of double mechanical seal structure that is used for screw expander is provided, can significantly improves the working life of mechanical seal under high rotating speed, high load.
The technological scheme that its technical problem that solves the utility model adopts is: a kind of double mechanical seal structure that is used for screw expander, it is characterized in that: comprise sealed case, moving ring assembly and static components, the moving ring assembly both sides respectively are provided with a static components, moving ring assembly and static components all are arranged in the sealed case, the contacting point of sealed case and static components is provided with spring seat, mounting spring in the spring seat.
Described mechanical seal structure top is provided with cooling system, and corresponding cooling system is provided with two connection mouths on sealed case, cooling system by two pipelines respectively with sealed case on two connection mouths be interconnected.Like this, cooling system is finished the cooling to mechanical seal structure automatically under gravitational potential energy, when the high-speed screws decompressor starts and shut down, and the damage phenomenon that can avoid the conventional mechanical sealing to be prone to because of dry friction.
Described sealed case is the seal case that is combined into by sealing case lid and outer gland, by knockdown seal case is set, makes installation of the present utility model become simple and efficient.
The outer avris of described static components is evenly offered a plurality of circular holes, and when static components contacted with the end face of moving ring assembly, the interior cooling liquid of red tin can that is arranged on the mechanical seal structure outside can form oil film, therefore adapts to high pressure, high rotating speed operating mode like this.In addition, preferably adopt the end face width-diameter ratio (seal f ace width and diameter of axle ratio) of less static components, according to the end face pressure ratio of high-speed screws decompressor under high rotating speed, adopt the end face width-diameter ratio of less static components that the heat of release is reduced, the heat conduction condition of friction pair improves, so the seal operation surface wear is more even.
In addition, described static component and dynamic assembly all are conventional or attainable device, its structure, the same prior art of function.
Because the both sides of this mechanical seal structure are respectively processing medium and bearing, and the pressure surge of processing medium side is very big, therefore, by spring being set in processing medium side and bearing side, the elasticity that relies on spring itself to have can make this mechanical seal structure can adapt to bigger pressure surge, the moment of torsion of bigger axial float can be born again, thereby high pressure and a certain amount of axial float can be adapted to.
The utility model is mainly used in the high-speed screws decompressor, 3000 rev/mins of the rotating speeds of screw expander.Working pressure is not higher than 2.0MPa, and operating temperature is not higher than 120 ℃.Because the working medium of screw expander is the organic media of alkanes, requires zero leakage, have only the requirement of using external dry gas seals just can reach zero leakage, because state's external sealed costs an arm and a leg, often be higher than domestic equal type sealing more than 3 times, cost is very high.As with external mechanical seal production domesticization, can adopt double mechanical seal of the present utility model according to the decompressor shell construction, when guaranteeing runnability, save a large sum of expense also can for country.
The beneficial effect that the utility model had is: a kind of double mechanical seal structure that is used for screw expander is provided, double mechanical seal is when guaranteeing runnability, can reach the excellent sealing effect of working medium zero leakage, and low than state's external sealed cost, be fit to be promoted use; By spring being set in processing medium side and bearing side, the elasticity that relies on spring itself to have can make this mechanical seal structure can adapt to bigger pressure surge, the moment of torsion of bigger axial float can be born again, thereby high pressure and a certain amount of axial float can be adapted to; By cooling system is set, when the high-speed screws decompressor starts and shut down, the damage phenomenon that can avoid the conventional mechanical sealing to be prone to because of dry friction; Sealed case is the seal case that is combined into by sealing case lid and outer gland, and simple installation is quick.
Description of drawings
Fig. 1 is an application state structural representation of the present utility model.
Among the figure: 1, sealing case lid; 2, static components; 3, moving ring assembly; 4, connection mouth; 5, pipeline; 6, cooling system; 7, outer gland; 8, spring seat; 9, spring
Embodiment
Below in conjunction with accompanying drawing embodiment of the present utility model is described further:
As shown in Figure 1, the double mechanical seal structure that is used for screw expander comprises sealed case, moving ring assembly 3 and static components 2, moving ring assembly 3 both sides respectively are provided with a static components 2, moving ring assembly 3 and static components 2 all are arranged in the sealed case, the contacting point of sealed case and static components 2 is provided with spring seat 8, and mounting spring 9 in the spring seat 8.
Described mechanical seal structure top is provided with cooling system 6, and corresponding cooling system 6 is provided with two connection mouths 4 on sealed case, cooling system 6 by two pipelines 5 respectively with sealed case on two connection mouths 4 be interconnected.Like this, cooling system 6 is finished the cooling to mechanical seal structure automatically under gravitational potential energy, when the high-speed screws decompressor starts and shut down, and the damage phenomenon that can avoid the conventional mechanical sealing to be prone to because of dry friction.
Described sealed case is the seal case that is combined into by sealing case lid 1 and outer gland 7, by knockdown seal case is set, makes installation of the present utility model become simple and efficient.
Described static components 2 outer avris are evenly offered a plurality of circular holes, and when static components 2 contacted with the end face of moving ring assembly 3, the interior cooling liquid of red tin can that is arranged on the mechanical seal structure outside can form oil film, therefore adapts to high pressure, high rotating speed operating mode like this.In addition, preferably adopt the end face width-diameter ratio (seal f ace width and diameter of axle ratio) of less static components 2, according to the end face pressure ratio of high-speed screws decompressor under high rotating speed, adopt the end face width-diameter ratio of less static components 2 that the heat of release is reduced, the heat conduction condition of friction pair improves, so the seal operation surface wear is more even.
In addition, described static components 2 and moving ring assembly 3 all are conventional or attainable device, its structure, the same prior art of function.
The both sides of this mechanical seal structure are respectively processing medium and bearing, and processing medium is arranged in the left side of diagram double mechanical seal structure, and bearing is arranged in the right side of diagram double mechanical seal structure.Because the pressure surge of processing medium side is very big, therefore, by spring 9 being set in processing medium side and bearing side, the elasticity that relies on spring 9 itself to have can make this mechanical seal structure can adapt to bigger pressure surge, the moment of torsion of bigger axial float can be born again, thereby high pressure and a certain amount of axial float can be adapted to.
The utility model is mainly used in the high-speed screws decompressor, 3000 rev/mins of the rotating speeds of screw expander.Working pressure is not higher than 2.0MPa, and operating temperature is not higher than 120 ℃.Because the working medium of screw expander is the organic media of alkanes, requires zero leakage, have only the requirement of using external dry gas seals just can reach zero leakage, because state's external sealed costs an arm and a leg, often be higher than domestic equal type sealing more than 3 times, cost is very high.As with external mechanical seal production domesticization, can adopt double mechanical seal of the present utility model according to the decompressor shell construction, when guaranteeing runnability, save a large sum of expense also can for country.
Claims (4)
1. double mechanical seal structure that is used for screw expander, it is characterized in that: comprise sealed case, moving ring assembly and static components, the moving ring assembly both sides respectively are provided with a static components, moving ring assembly and static components all are arranged in the sealed case, the contacting point of sealed case and static components is provided with spring seat, mounting spring in the spring seat.
2. the double mechanical seal structure that is used for screw expander according to claim 1, it is characterized in that: described mechanical seal structure top is provided with cooling system, corresponding cooling system is provided with two connection mouths on sealed case, cooling system by two pipelines respectively with sealed case on two connection mouths be interconnected.
3. the double mechanical seal structure that is used for screw expander according to claim 1 and 2 is characterized in that: described sealed case is the seal case that is combined into by sealing case lid and outer gland.
4. the double mechanical seal structure that is used for screw expander according to claim 1 is characterized in that: the outer avris of described static components is evenly offered a plurality of circular holes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205755240U CN201827368U (en) | 2010-10-25 | 2010-10-25 | Double-end face mechanical sealing structure for screw expansion machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205755240U CN201827368U (en) | 2010-10-25 | 2010-10-25 | Double-end face mechanical sealing structure for screw expansion machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201827368U true CN201827368U (en) | 2011-05-11 |
Family
ID=43965905
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205755240U Expired - Fee Related CN201827368U (en) | 2010-10-25 | 2010-10-25 | Double-end face mechanical sealing structure for screw expansion machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201827368U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103867232A (en) * | 2014-03-13 | 2014-06-18 | 江西华电电力有限责任公司 | Screw expander with good sealing property |
| CN104455444A (en) * | 2014-11-27 | 2015-03-25 | 山东明天机械有限公司 | Mechanical seal used for vapor compressor |
| CN105587865A (en) * | 2016-02-29 | 2016-05-18 | 浙江诚信医化设备有限公司 | Lubrication structure of mechanical seal |
| CN110553039A (en) * | 2019-09-02 | 2019-12-10 | 福州市虚谷技术有限公司 | screw expander sealing structure |
| CN111706404A (en) * | 2020-05-12 | 2020-09-25 | 中国核动力研究设计院 | Supercritical carbon dioxide dry gas sealing device with spiral cooling structure and method |
| CN114278733A (en) * | 2021-12-23 | 2022-04-05 | 中国航空工业集团公司金城南京机电液压工程研究中心 | Rotary sealing device controlled by wave spring |
-
2010
- 2010-10-25 CN CN2010205755240U patent/CN201827368U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103867232A (en) * | 2014-03-13 | 2014-06-18 | 江西华电电力有限责任公司 | Screw expander with good sealing property |
| CN104455444A (en) * | 2014-11-27 | 2015-03-25 | 山东明天机械有限公司 | Mechanical seal used for vapor compressor |
| CN105587865A (en) * | 2016-02-29 | 2016-05-18 | 浙江诚信医化设备有限公司 | Lubrication structure of mechanical seal |
| CN110553039A (en) * | 2019-09-02 | 2019-12-10 | 福州市虚谷技术有限公司 | screw expander sealing structure |
| CN111706404A (en) * | 2020-05-12 | 2020-09-25 | 中国核动力研究设计院 | Supercritical carbon dioxide dry gas sealing device with spiral cooling structure and method |
| CN111706404B (en) * | 2020-05-12 | 2022-08-30 | 中国核动力研究设计院 | Supercritical carbon dioxide dry gas sealing device with spiral cooling structure and method |
| CN114278733A (en) * | 2021-12-23 | 2022-04-05 | 中国航空工业集团公司金城南京机电液压工程研究中心 | Rotary sealing device controlled by wave spring |
| CN114278733B (en) * | 2021-12-23 | 2023-11-07 | 中国航空工业集团公司金城南京机电液压工程研究中心 | Wave spring controlled rotary sealing device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110511 Termination date: 20151025 |
|
| EXPY | Termination of patent right or utility model |