CN103383003A - External drive type mechanical seal of middle rotating ring - Google Patents
External drive type mechanical seal of middle rotating ring Download PDFInfo
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- CN103383003A CN103383003A CN2012101309155A CN201210130915A CN103383003A CN 103383003 A CN103383003 A CN 103383003A CN 2012101309155 A CN2012101309155 A CN 2012101309155A CN 201210130915 A CN201210130915 A CN 201210130915A CN 103383003 A CN103383003 A CN 103383003A
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- rotating ring
- middle rotating
- driving
- mechanical seal
- ring
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Abstract
The invention provides external drive type mechanical seal of a middle rotating ring. The middle rotating ring is arranged between a movable ring and a stationary ring, wherein the sealing end surfaces of the movable ring and the stationary ring are oppositely arranged, two end surfaces of the middle rotating ring are opposite to the movable ring and the stationary ring, and the rotation of the middle rotating ring is driven by an external power producer. The output shaft of the power producer is directly connected with the driving wheel of a transmission wheel group in a transmission manner or is connected with the input shaft of the transmission wheel group through a coupler, the driven wheel of the transmission wheel group is connected with a transmission shaft sleeve, and the transmission shaft sleeve is connected with the middle rotating ring in a transmission manner. The relative rotating speed between the sealing end surfaces of the mechanical seal are adjustable, the rotating speed of a unit to-be-sealed does not determine the relevant rotating speeds of the sealing end surfaces directly, so that high speed mechanical seal and low speed mechanical seal are more stable.
Description
Technical field
The invention belongs to the axial end sealing of rotating machinery, be particularly related to the mechanical seal of a kind of external driving middle rotating ring, this external driving middle rotating ring mechanical seal can be used for the axial end sealing of the rotation class machines such as the compressor, decompressor, seperator, pump, reactor of various types.
Background technique
Mechanical seal is widely used in the axial end face seal of numerous rotating machineries, but under senior staff officer's state, particularly at a high speed and the stability that seals during lower-speed state, is two difficulties that perplex the researcher all the time.Be in particular in: contacting mechanical seal relative rotation speed between the fast state lower sealing surface is too high, causes the phenomenons such as sealing surface friction, wearing and tearing, heating, distortion serious, and sealability descends rapidly, even cisco unity malfunction; And non-contact mechanical seal fluid film between the low speed state lower end surface can not generate enough opening forces and rigidity, can't guarantee the normal separation of sealing surface and the stability in gap.For traditional mechanical seal, on the general circumferential running shaft that is fixed on sealed machine of rotating ring, cause being difficult to initiatively change the relative rotation speed between dynamic and static ring sealing surface under the given condition of sealed machine.
By increase the mode of middle rotating ring between dynamic and static ring, change the relative rotation speed between mechanical seal two sealing surfaces, be a kind of effective sealing surface relative rotation speed regulate and control method.But, be a difficulties for adjustment and the control of middle rotating ring rotating speed.
At this, the mechanical seal of a kind of external driving middle rotating ring is proposed, by power source and necessary driving component are set, rotating speed is outputed to middle rotating ring.Be characterized in: middle rotating ring arranges corresponding power source, and be connected with middle rotating ring by necessary driving component, come the rotating speed of active accommodation middle rotating ring, thereby make different rotating speeds unit seal face can obtain a suitable relative rotational, break away from sealed generating unit speed to the impact of sealability, stability and the working life of elevating mechanism sealing.
Summary of the invention
The purpose of this invention is to provide the mechanical seal of a kind of external driving middle rotating ring.
The present invention is the mechanical seal of a kind of external driving middle rotating ring, totally mainly is made of mechanical seal part and power source, is connected by driving component between two-part.Specifically mainly by rotating ring 1, middle rotating ring 2, stationary ring 3, driving sleeve 4, support 5, power source 6, coupling 7, drive wheel Z
1, drive wheel Z
2, the formation such as power source output shaft II, transmission shaft III.Wherein mechanical sealing part divides and comprises: rotating ring 1, middle rotating ring 2, stationary ring 3.
Drive wheel Z
1Circumferentially be fixed on driving sleeve 4 with middle rotating ring 2, driving sleeve 4 empty sets on the axle I, drive wheel Z
2Circumferentially be fixed on power source output shaft II or transmission shaft III, the output shaft II of power source 6 is by coupling 7 or direct and drive wheel Z
2Connect.
Working procedure of the present invention is: power source 6 is by coupling 7 or directly drive drive wheel Z
2Rotation, drive wheel Z
2Drive drive wheel Z
1Rotation, drive wheel Z
1Rotation pass to middle rotating ring 2 by driving sleeve 4, and finally drive middle rotating ring 2 and driving sleeve 4 and drive wheel Z
1Synchronous revolving.Middle rotating ring 2 has just obtained a rotational speed that is different from sealed unit running shaft I like this, again respectively with rotating ring 1 and stationary ring 2 pairings, has finally reached change by the purpose of the relative rotational between front cover because of middle rotating ring 2.
The present invention mainly adopts following technical measures to realize: the mechanical seal of described external driving middle rotating ring, between the rotating ring 1 that is oppositely arranged with seal face and stationary ring 3, be provided with the both ends of the surface middle rotating ring 2 relative with stationary ring 3 with rotating ring 1 respectively, this middle rotating ring 2 is through driving sleeve 4, follower Z
1, driving wheel Z
2Be connected with external power source 6, middle rotating ring 2, follower Z
1Circumferentially be fixed on driving sleeve 4, driving sleeve 4 empty sets on the axle I, driving wheel Z
2Be in transmission connection with the output shaft II of external power source 6.
The mechanical seal of described external driving middle rotating ring, its driving wheel Z
2Directly be connected with the output shaft II of external power source 6, specifically can use the modes such as driving pin, key, expansion set to be in transmission connection, but preferably adopt the driving pin mode to be in transmission connection.
The mechanical seal of described external driving middle rotating ring, its driving wheel Z
2Be connected with the transmission shaft III by coupling 7, transmission shaft III and driving wheel Z
2Be in transmission connection.
The mechanical seal of described external driving middle rotating ring, the rotational speed of sealed unit running shaft I is n
1, the rotational speed of middle rotating ring 2 is n
2, two rotating speed ratio i=n
2/ n
1, the span of i is 0.3 ~ 500.use the unit situation according to present mechanical seal, its rotating speed of higher rotation speed unit is about 7000 ~ 15000rpm, medium its rotating speed of rotating speed unit is about 2500 ~ 4000rpm, be about 20 ~ 1000rpm than its rotating speed of slow-speed of revolution unit, and according to actual use condition, contact seal is as only arranging a central ring, consider the uniformity of two groups of sealing surface relative rotation speeds, the span of ratio i should be chosen near 0.5, and the noncontact seal rotating speed can obtain higher fluid film rigidity and stability at 8000 ~ 10000rpm scope inner sealing surface, the span of i is about 2 ~ 500, particularity and the transmission efficiency in actual course of working with due regard to, the span of determining rotating speed ratio i is 0.3 ~ 500.
The mechanical seal of described external driving middle rotating ring, has external power source 6, this power source 6 is output as and approximate rotatablely moves uniformly, specifically can motor, steam turbine, internal-combustion engine, motor equal power device, but preferably adopt adjustable varying-speed motor as external power source.
The mechanical seal of described external driving middle rotating ring, the feature of its drive wheel is to carry out the transmission of circumferential rotation motion, can be specifically gear, belt wheel, friction wheel, sprocket wheel etc., but preferably adopt gear and belt wheel as drive wheel, the corresponding use is with transmission or gear transmission respectively, when two center transmission shafts are drive wheel apart from a hour preferred gear, when two center transmission shafts preferred belt wheel when larger is drive wheel.
With mode transmissions such as pin, key, expansion set, screws, but preferred mode is to be in transmission connection through the driving pin mode with its internal side diameter and driving sleeve 4 for the mechanical seal of this external driving middle rotating ring, described middle rotating ring 2.
The present invention has following characteristics: 1. the seal face relative rotation speed is adjustable; 2. the rotating speed adjustable extent of middle rotating ring is wide; 3. make high, low speed mechanical seal have higher stability.
Description of drawings
Fig. 1 is preferred implementation 1 schematic diagram of external driving middle rotating ring of the present invention mechanical seal.
Fig. 2 is preferred implementation 2 schematic diagram of external driving middle rotating ring of the present invention mechanical seal.
Fig. 3 is preferred implementation 3 schematic diagram of external driving middle rotating ring of the present invention mechanical seal.
Fig. 4 is the structural representation of a kind of mechanical seal device corresponding with Fig. 1 to Fig. 3.
In figure, related symbol is: 1-rotating ring; 2-middle rotating ring; 3-stationary ring; 4-driving sleeve; 5-support; 6-power source; 7-coupling; Z
1-drive wheel (follower) represents the diameter that this is taken turns simultaneously; Z
2-drive wheel (driving wheel) represents the diameter that this is taken turns simultaneously; I-sealed unit running shaft, the output shaft of II-power source, III-transmission shaft.
Embodiment
For further understanding content of the present invention, characteristics and function, hereby with specific embodiment, be described with reference to the accompanying drawings as follows.
Embodiment 1: consult Fig. 1, Fig. 4.
Totally mainly being made of mechanical seal part and power source of the present embodiment connected by driving component between two-part.Specifically mainly by rotating ring 1, middle rotating ring 2, stationary ring 3, driving sleeve 4, support 5, power source 6, belt wheel (being follower) Z
1, belt wheel (being that the principal and subordinate takes turns) Z
2, the formation such as power source output shaft II.Wherein mechanical sealing part divides and comprises: rotating ring 1, middle rotating ring 2, stationary ring 3.
Belt wheel Z
1Circumferentially be fixed on driving sleeve 4 with middle rotating ring 2, driving sleeve 4 empty sets on the axle I, belt wheel Z
2Be fixed on power source output shaft II.
The working procedure of the present embodiment is: the direct driving pulley Z of power source 6
2Rotation, belt wheel Z
2Band movable belt pulley Z
1Rotation, belt wheel Z
1Rotation pass on middle rotating ring 2 by driving sleeve 4, and finally drive middle rotating ring 2 and driving sleeve 4 and belt wheel Z
1Synchronous revolving.Middle rotating ring 2 has just obtained a rotational speed that is different from sealed unit running shaft I like this, again respectively with rotating ring 1 and stationary ring 2 pairings, has finally reached change by the purpose of the relative rotational between front cover because of middle rotating ring 2.
The rotating speed of supposing sealed unit running shaft I is n
1, the rotating speed of middle rotating ring 2 is n
2, the output speed of power source 6 is n
6, the rotating ratio i of middle rotating ring 2 and axle I is: i=n
2/ n
1=(Z
2n
6)/(Z
1n
1).Can be by changing the output speed n of power source 6
6With the diameter of each belt wheel, realize middle rotating ring 2 rotation speed n
2Adjustment.The rotating speed of rotating ring 1 is all n mutually with the rotating speed of running shaft I
1, the relative rotation speed of rotating ring 1 and sealing surface that middle rotating ring 2 consists of is n
2± n
1, middle rotating ring 2 is n with the relative rotation speed of the formation sealing surface of stationary ring 3
2
Embodiment 2: consult Fig. 2, Fig. 4.
Totally still mainly being made of mechanical seal part and power source of the present embodiment connected by driving component between two-part.Specifically mainly by rotating ring 1, middle rotating ring 2, stationary ring 3, driving sleeve 4, support 5, power source 6, gear (being follower) Z
1, gear (being driving wheel) Z
2, the formation such as power source output shaft II.Wherein mechanical sealing part divides and comprises: rotating ring 1, middle rotating ring 2, stationary ring 3.
Embodiment 3: consult Fig. 3, Fig. 4.
Totally still mainly being made of mechanical seal part and power source of the present embodiment connected by driving component between two-part.Specifically mainly by rotating ring 1, middle rotating ring 2, stationary ring 3, driving sleeve 4, support 5, power source 6, coupling 7, gear (being follower) Z
1, gear (being driving wheel) Z
2, the formation such as power source output shaft II, transmission shaft III.Wherein mechanical sealing part divides and comprises: rotating ring 1, middle rotating ring 2, stationary ring 3.
In above embodiment, focus on embodying output shaft II and the drive wheel Z of power source 6
2Whether directly be connected, and drive wheel Z
1, Z
2Usual way, used respectively coupling, gear transmission and three kinds of modes of band transmission, and chain transmission in actual applications, friction wheel transmission etc. also can reach identical effect.For clearer description key problem, above embodiment only relates to the single-stage sealing configuration, and in actual use, the sealing total arrangement can have multiple pattern as required as labyrinth (more than two-stage) in the middle of: mechanical single seal, double seals, tandem seal (more than two-stage), series connection band, also can follow other seal style composition combined labyrinth and carbon gland such as floating-ring seal, carbon ring seal, labyrinth seal.
Claims (7)
1. external driving middle rotating ring mechanical seal, between the rotating ring that is oppositely arranged with seal face (1) and stationary ring (3), be provided with the both ends of the surface middle rotating ring (2) relative with stationary ring (3) with rotating ring (1) respectively, it is characterized in that middle rotating ring (2) is through driving sleeve (4), follower (Z
1), driving wheel (Z
2) be connected with external power source (6), and driven rotation, middle rotating ring (2), follower (Z by external power source (6)
1) circumferentially be fixed on driving sleeve (4), driving sleeve (4) empty set on axle (I), driving wheel (Z
2) be in transmission connection with the output shaft (II) of external power source (6).
2. a kind of external driving middle rotating ring as claimed in claim 1 mechanical seal, the output shaft (II) that it is characterized in that described external power source (6) and driving wheel (Z
2) use the driving pin mode to be in transmission connection.
3. a kind of external driving middle rotating ring as claimed in claim 1 mechanical seal is characterized in that the output shaft (II) of described external power source (6) is connected with transmission shaft (III) by coupling (7), transmission shaft (III) and driving wheel (Z
2) be in transmission connection.
4. a kind of external driving middle rotating ring as claimed in claim 1 mechanical seal is characterized in that described middle rotating ring (2) and the span of the rotating ratio of sealed unit running shaft (I) are 0.3 ~ 500.
5. a kind of external driving middle rotating ring as claimed in claim 1 mechanical seal is characterized in that described external power source (6) is adjustable varying-speed motor.
6. a kind of external driving middle rotating ring as claimed in claim 1 mechanical seal is characterized in that described driving wheel (Z
2), follower (Z
1) be gear or belt wheel.
7. a kind of external driving middle rotating ring as claimed in claim 1 mechanical seal is characterized in that described middle rotating ring (2) is in transmission connection through the driving pin mode with its internal side diameter and driving sleeve (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101309155A CN103383003A (en) | 2012-05-02 | 2012-05-02 | External drive type mechanical seal of middle rotating ring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101309155A CN103383003A (en) | 2012-05-02 | 2012-05-02 | External drive type mechanical seal of middle rotating ring |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103383003A true CN103383003A (en) | 2013-11-06 |
Family
ID=49490879
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012101309155A Pending CN103383003A (en) | 2012-05-02 | 2012-05-02 | External drive type mechanical seal of middle rotating ring |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103383003A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113944744A (en) * | 2020-07-16 | 2022-01-18 | 丰田自动车株式会社 | Sealing structure of driving device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2059203U (en) * | 1989-04-07 | 1990-07-11 | 武汉工业大学 | Differerential shaft seal device |
| JPH0454382B2 (en) * | 1987-01-12 | 1992-08-31 | Intaanashonaru Bijinesu Mashiinzu Corp | |
| EP0878625A2 (en) * | 1998-08-04 | 1998-11-18 | Maag Pump Systems Textron AG | Method and device for sealing a shaft and use of the method and the device in a gear pump |
| CN101806362A (en) * | 2010-04-12 | 2010-08-18 | 西华大学 | Mechanical sealing device of middle rotating ring |
| CN202659903U (en) * | 2012-05-02 | 2013-01-09 | 西华大学 | Mechanical seal for externally-driven intermediate rotating ring |
-
2012
- 2012-05-02 CN CN2012101309155A patent/CN103383003A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0454382B2 (en) * | 1987-01-12 | 1992-08-31 | Intaanashonaru Bijinesu Mashiinzu Corp | |
| CN2059203U (en) * | 1989-04-07 | 1990-07-11 | 武汉工业大学 | Differerential shaft seal device |
| EP0878625A2 (en) * | 1998-08-04 | 1998-11-18 | Maag Pump Systems Textron AG | Method and device for sealing a shaft and use of the method and the device in a gear pump |
| CN101806362A (en) * | 2010-04-12 | 2010-08-18 | 西华大学 | Mechanical sealing device of middle rotating ring |
| CN202659903U (en) * | 2012-05-02 | 2013-01-09 | 西华大学 | Mechanical seal for externally-driven intermediate rotating ring |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113944744A (en) * | 2020-07-16 | 2022-01-18 | 丰田自动车株式会社 | Sealing structure of driving device |
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| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20131106 |