CN103486045A - Lubricating structure for mechanical seal of Roots pump - Google Patents
Lubricating structure for mechanical seal of Roots pump Download PDFInfo
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- CN103486045A CN103486045A CN201310484485.1A CN201310484485A CN103486045A CN 103486045 A CN103486045 A CN 103486045A CN 201310484485 A CN201310484485 A CN 201310484485A CN 103486045 A CN103486045 A CN 103486045A
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- side cover
- motor side
- roots pump
- lubricating
- mechanical seal
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Abstract
The invention belongs to the technical field of Roots pumps, particularly relates to a lubricating structure for a mechanical seal of a Roots pump and solves technical problems of short service life and the like in the prior art. According to the lubricating structure for the mechanical seal of the Roots pump, the Roots pump comprises a motor side cover and a rotating shaft, wherein one end of the rotating shaft penetrates through the axial center of the motor side cover, a stationary ring sleeved on the rotating shaft is fixedly sealed in the motor side cover, and a moving ring sleeved on the rotating shaft and located between the stationary ring and the motor side cover is further arranged in the motor side cover; the lubricating structure comprises a lubricating and sealing cavity arranged between the stationary ring and the motor side cover, the moving ring is located in the lubricating and sealing cavity, an oil supply passage communicated with the lubricating and sealing cavity is arranged at the side part of the motor side cover, and an exhausting structure capable of exhausting air in the lubricating and sealing cavity when the oil is supplied to the lubricating and sealing cavity through the oil supply passage is arranged on the motor side cover. The lubricating structure has the advantage that the lubricating oil can smoothly flow to the bottom of the lubricating and sealing cavity so as to meet lubricating requirements.
Description
Technical field
The invention belongs to the Roots pump technical field, especially relate to a kind of lubricating structure of Roots pump mechanical seal.
Background technique
Roots pump is a kind of rotary positive-displacement vacuum pump, and it is developed by Roots blower.The limiting vacuum of Roots pump, except depending on this body structure of pump and accuracy of manufacturing, also depends on the limiting vacuum of fore pump.In order to improve the ultimate vacuum of pump, the Roots pump series connection can be used.The working principle of Roots pump is similar to Roots blower.Due to the continuous rotation of rotor, pumped gas is drawn in the space v0 between rotor and pump case from suction port, then discharges through relief opening.Because air-breathing rear v0 space is full closeding state, so gas does not have compression and expansion in pump chamber.But, when rotor top turns over the relief opening edge, when the v0 space communicates with exhaust side, because the exhaust side gas pressure intensity is higher, during some gas recoils space v0, gas pressure intensity is increased suddenly.When rotor is rotated further, outside the gas excavationg pump.Roots pump, in pump chamber, has the rotor of two figures of eight to be arranged on mutual vertically on the pair of parallel axle, a pair of gear band action that is 1 by velocity ratio reverse synchronous rotary motion each other.Between rotor, between rotor and pump housing endophragm, maintain certain gap, can realize high rotating speed operation.
At present, existing Roots pump generally comprises motor and the pump housing, be provided with mechanical sealing mechanism between the side cover of motor and machine shaft, this mechanical sealing mechanism is generally a rotating ring and a stationary ring, rotating ring and stationary ring all are enclosed within on machine shaft, when Roots pump is worked, rotating ring must have lubricated, not so wearing and tearing are too large, or it is after work a period of time, need to add lubricant oil, for this reason, existing settling mode is to hole on side cover, then add lubricant oil, due to the cavity for sealing between stationary ring and side cover, when adding lubricant oil, owing to there being air in cavity, lubricant oil is difficult to flow into the bottom of cavity, the critical defect of this scheme can cause the heavy wear of mechanical sealing mechanism and oil leakage phenomenon occurs, affect normal use and the operation of Roots pump.
Summary of the invention
The objective of the invention is for the problems referred to above, provide a kind of design more rationally and can significantly extend the lubricating structure of the Roots pump mechanical seal in Roots pump working life.
For achieving the above object, the present invention has adopted following technical proposal: the lubricating structure of this Roots pump mechanical seal, Roots pump comprises that motor side cover and an end are located in the rotating shaft of motor side cover axial centre, in the motor side cover, sealing is installed with the stationary ring be enclosed within this rotating shaft, also be provided with in the motor side cover and be set in rotating shaft and the rotating ring between stationary ring and motor side cover, this lubricating structure comprises the lubrication and seal cavity be arranged between stationary ring and motor side cover, described rotating ring is positioned at the lubrication and seal cavity, sidepiece at the motor side cover is provided with the oil supply gallery be communicated with described lubrication and seal cavity, cover and be provided with when oil supply gallery to can be by the exhaust structure of the Bas Discharged in the lubrication and seal cavity during fuel feeding in the lubrication and seal cavity at motor side.
When adding lubricant oil to Roots pump mechanical seal, can be by the Bas Discharged in the lubrication and seal cavity by exhaust structure, this structure just can guarantee that lubricant oil flows into the bottom of lubrication and seal cavity, the normal profit that guarantees Roots pump mechanical seal is changed, stop oil leakage phenomenon, virtually extended the working life of Roots pump mechanical seal and Roots pump.
In the lubricating structure of above-mentioned Roots pump mechanical seal, described exhaust structure comprises that at least one is arranged on the exhaust port that motor side covers and be communicated with motor internal, more than the inlet end of described exhaust port is positioned at the normal lubricated pasta of lubrication and seal cavity.This structure can guarantee when lubricant oil is difficult for overflowing can meet usage requirement again.
In the lubricating structure of above-mentioned Roots pump mechanical seal, the inlet end of described exhaust port is positioned at the annular end face of rotating ring away from an end of stationary ring.This structure can prevent that Roots pump rotation due to rotating shaft when work from making lubricant oil flow out by exhaust port, prevents leakage of oil.
In the lubricating structure of above-mentioned Roots pump mechanical seal, the diameter of described exhaust port is Φ 1m～Φ 5m.The diameter here can be formulated according to actual requirement.
In the lubricating structure of above-mentioned Roots pump mechanical seal, described exhaust port is horizontally disposed with, and the longitudinal center line of this exhaust port and rotating shaft axial centre line parallel.
As another scheme, in the lubricating structure of above-mentioned Roots pump mechanical seal, described exhaust port upwards is obliquely installed outwardly.This structure can well prevent that lubricant oil from overflowing.
As another optimized project, in the lubricating structure of above-mentioned Roots pump mechanical seal, described exhaust port is established towards outer incline downwards.
In the lubricating structure of above-mentioned Roots pump mechanical seal, the diameter of described exhaust port is Φ 2m～Φ 4m.
In the lubricating structure of above-mentioned Roots pump mechanical seal, described oil supply gallery oil inlet end has internal thread.Do not needing to add under lubricated oil condition, screw or a plug had with screw-internal thread fit is being set in oil supply gallery, preventing that oil leakage from going out or dust granule enters in the lubrication and seal cavity.
Compared with prior art, the advantage of the lubricating structure of this Roots pump mechanical seal is: 1, design is more reasonable, can make lubricant oil flow into smoothly the bottom of lubrication and seal cavity, to meet lubricating requirement, has extended the working life of Roots pump; 2, structure is simpler, does not have oil leakage phenomenon; Stability while 3, further having improved Roots pump work, the safety while guaranteeing operation.
The accompanying drawing explanation
Fig. 1 is structural representation provided by the invention.
Fig. 2 is embodiment's one structural representation provided by the invention.
Fig. 3 is embodiment's two structural representations provided by the invention.
Fig. 4 is embodiment's three structural representations provided by the invention.
In figure, motor side cover 11, oil supply gallery 11a, exhaust port 11b, rotating shaft 12, stationary ring 13, rotating ring 14, lubrication and seal cavity a.
Embodiment
Be below the specific embodiment by reference to the accompanying drawings of model utility, technological scheme of the present invention is further described, but the present invention be not limited to these embodiments.
Embodiment one
As shown in Figure 1-2, the lubricating structure of this Roots pump mechanical seal, Roots pump comprises that motor side cover 11 and an end are located in the rotating shaft 12 of motor side cover 11 axial centre, be installed with the stationary ring 13 be enclosed within this rotating shaft 12 in the interior sealing of motor side cover 11, also be provided with in motor side cover 11 and be set in rotating shaft 12 and the rotating ring 14 between stationary ring 13 and motor side cover 11, this lubricating structure comprises the lubrication and seal cavity a be arranged between stationary ring 13 and motor side cover 11, described rotating ring 14 is positioned at lubrication and seal cavity a, sidepiece at motor side cover 11 is provided with the oil supply gallery 11a be communicated with described lubrication and seal cavity a, there is internal thread at oil supply gallery 11a oil inlet end, this structure is not when needing to add under lubricated oil condition, screw or a plug had with screw-internal thread fit can be set in oil supply gallery 11a, thereby prevent that oil leakage from going out or dust granule enters in lubrication and seal cavity a.
When adding lubricant oil to Roots pump mechanical seal, on motor side cover 11, be provided with as oil supply gallery 11a to can be by the exhaust structure of the Bas Discharged in lubrication and seal cavity a during fuel feeding in lubrication and seal cavity a.Concrete, the exhaust structure of the present embodiment comprises the exhaust port 11b that at least one is arranged on motor side cover 11 and is communicated with motor internal, the diameter of this exhaust port 11b is Φ 1m～Φ 5m, the exhaust port 11b of the present embodiment is horizontally disposed with, and the longitudinal center line of this exhaust port 11b and rotating shaft 12 axial centre line parallels, optimal design, the diameter of this exhaust port 11b is Φ 2m～Φ 4m, more than the inlet end of described exhaust port 11b is positioned at the normal lubricated pasta of lubrication and seal cavity a.This structure can guarantee normal lubricated on the one hand, can guarantee that on the other hand lubricant oil is difficult for overflowing, and has further strengthened the practicability of the present embodiment.
In addition, the inlet end of above-mentioned exhaust port 11b is positioned at the annular end face of rotating ring 14 away from an end of stationary ring 13.This structure be exactly the inlet end of exhaust port 11b be in the annular end face of rotating ring 14, can further guarantee that lubricant oil is difficult for overflowing or sputters lubrication and seal cavity a.
As the optimized scheme of the present embodiment, the inlet end height that the diameter of exhaust port 11b is Φ 3m and exhaust port 11b is higher than the normal lubricated pasta in lubrication and seal cavity a.
The principle of the present embodiment is as follows: when adding lubricant oil to Roots pump mechanical seal, can be by the Bas Discharged in lubrication and seal cavity a by exhaust structure, this structure just can guarantee that lubricant oil flows into the bottom of lubrication and seal cavity a, the normal profit that guarantees Roots pump mechanical seal (rotating ring 14 and stationary ring 13) is changed, stop oil leakage phenomenon, virtually extended the working life of Roots pump mechanical seal and Roots pump.
Embodiment two
As shown in Figure 3, the present embodiment is basic identical with embodiment one structure and principle, and different place is: described exhaust port 11b upwards is obliquely installed outwardly, and the diameter of this exhaust port 11b is Φ 2m.Further, the angle of the longitudinal center line of this exhaust port 11b and the longitudinal center line of rotating shaft 12 is 30 °, and this structure can well prevent that lubricant oil from overflowing.
Embodiment three
As shown in Figure 4, the present embodiment is basic identical with embodiment one structure and principle, and different place is: described exhaust port 11b is obliquely installed downwards outwardly, and the diameter of this exhaust port 11b is Φ 4m.Further, the angle of the longitudinal center line of the longitudinal center line of this exhaust port 11b and rotating shaft 12 is 45 °.
Specific embodiment described herein is only to the explanation for example of the present invention's spirit.Those skilled in the art can make various modifications or supplement or adopt similar mode to substitute described specific embodiment, but can't depart from spirit of the present invention or surmount the defined scope of appended claims.
Although this paper has more been used the terms such as motor side cover 11, oil supply gallery 11a, exhaust port 11b, rotating shaft 12, stationary ring 13, rotating ring 14, lubrication and seal cavity a, do not get rid of the possibility of using other term.Using these terms is only that they are construed to any additional restriction is all contrary with spirit of the present invention in order to describe more easily and explain essence of the present invention.
Claims (9)
1. the lubricating structure of a Roots pump mechanical seal, Roots pump comprises that motor side cover (11) and an end are located in the rotating shaft (12) of motor side cover (11) axial centre, in motor side cover (11), sealing is installed with the stationary ring (13) be enclosed within this rotating shaft (12), also be provided with in motor side cover (11) and be set in rotating shaft (12) above and be positioned at the rotating ring (14) between stationary ring (13) and motor side cover (11), it is characterized in that, this lubricating structure comprises the lubrication and seal cavity (a) be arranged between stationary ring (13) and motor side cover (11), described rotating ring (14) is positioned at lubrication and seal cavity (a), sidepiece at motor side cover (11) is provided with the oil supply gallery (11a) be communicated with described lubrication and seal cavity (a), on motor side cover (11), be provided with when oil supply gallery (11a) to can be by the exhaust structure of the Bas Discharged in lubrication and seal cavity (a) during fuel feeding in lubrication and seal cavity (a).
2. the lubricating structure of Roots pump mechanical seal according to claim 1, it is characterized in that, described exhaust structure comprises that at least one is arranged on the exhaust port (11b) that motor side cover (11) is upper and be communicated with motor internal, more than the inlet end of described exhaust port (11b) is positioned at the normal lubricated pasta of lubrication and seal cavity (a).
3. the lubricating structure of Roots pump mechanical seal according to claim 2, is characterized in that, the inlet end of described exhaust port (11b) is positioned at the annular end face of rotating ring (14) away from an end of stationary ring (13).
4. according to the lubricating structure of the described Roots pump mechanical seal of claim 2 or 3, it is characterized in that, the diameter of described exhaust port (11b) is Φ 1m～Φ 5m.
5. the lubricating structure of Roots pump mechanical seal according to claim 4, is characterized in that, described exhaust port (11b) is horizontally disposed with, and the longitudinal center line of this exhaust port (11b) and rotating shaft (12) axial centre line parallel.
6. the lubricating structure of Roots pump mechanical seal according to claim 4, is characterized in that, described exhaust port (11b) upwards is obliquely installed outwardly.
7. the lubricating structure of Roots pump mechanical seal according to claim 4, is characterized in that, described exhaust port (11b) is obliquely installed downwards outwardly.
8. the lubricating structure of Roots pump mechanical seal according to claim 4, is characterized in that, the diameter of described exhaust port (11b) is Φ 2m～Φ 4m.
9. the lubricating structure of Roots pump mechanical seal according to claim 8, is characterized in that, described oil supply gallery (11a) oil inlet end has internal thread.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310484485.1A CN103486045B (en) | 2013-10-16 | 2013-10-16 | The lubricating structure of Roots pump mechanical seal |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310484485.1A CN103486045B (en) | 2013-10-16 | 2013-10-16 | The lubricating structure of Roots pump mechanical seal |
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| CN103486045A true CN103486045A (en) | 2014-01-01 |
| CN103486045B CN103486045B (en) | 2016-04-13 |
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| CN201310484485.1A Active CN103486045B (en) | 2013-10-16 | 2013-10-16 | The lubricating structure of Roots pump mechanical seal |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6287100B1 (en) * | 1998-04-30 | 2001-09-11 | Ghh-Rand Schraubenkompressoren Gmbh | Sealing device on a shaft journal of a dry-running helical rotary compressor |
| EP1308626A1 (en) * | 2001-11-02 | 2003-05-07 | Sterling Fluid Systems (Germany) GmbH | Liquid ring pump |
| DE202004019718U1 (en) * | 2004-12-21 | 2005-03-03 | Burgmann Industries Gmbh & Co. Kg | Assembly of shaft and rotating mechanical seal, especially for refrigerant compressor, has passage for feed of flow medium provided in shaft and opens out into cavity defined by drive collar housing |
| CN101158361A (en) * | 2007-09-28 | 2008-04-09 | 贵州宏福实业开发有限总公司 | Phosphoric acid axial-flow pump dry gas sealing device |
| CN201050480Y (en) * | 2007-06-18 | 2008-04-23 | 陈全玉 | Mechanical seal oil-free Root's vacuum pump |
| CN201100267Y (en) * | 2007-10-22 | 2008-08-13 | 佛山市顺德区顺达船舶工程有限公司 | A pump axis sealing device |
| CN202500774U (en) * | 2011-11-18 | 2012-10-24 | 宜兴优纳特机械有限公司 | Composite sealing device for Roots blower end cover |
| CN103147989A (en) * | 2011-12-07 | 2013-06-12 | 宜兴优纳特机械有限公司 | Double-end-face mechanical sealing device of Roots fan |
-
2013
- 2013-10-16 CN CN201310484485.1A patent/CN103486045B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6287100B1 (en) * | 1998-04-30 | 2001-09-11 | Ghh-Rand Schraubenkompressoren Gmbh | Sealing device on a shaft journal of a dry-running helical rotary compressor |
| EP1308626A1 (en) * | 2001-11-02 | 2003-05-07 | Sterling Fluid Systems (Germany) GmbH | Liquid ring pump |
| DE202004019718U1 (en) * | 2004-12-21 | 2005-03-03 | Burgmann Industries Gmbh & Co. Kg | Assembly of shaft and rotating mechanical seal, especially for refrigerant compressor, has passage for feed of flow medium provided in shaft and opens out into cavity defined by drive collar housing |
| CN201050480Y (en) * | 2007-06-18 | 2008-04-23 | 陈全玉 | Mechanical seal oil-free Root's vacuum pump |
| CN101158361A (en) * | 2007-09-28 | 2008-04-09 | 贵州宏福实业开发有限总公司 | Phosphoric acid axial-flow pump dry gas sealing device |
| CN201100267Y (en) * | 2007-10-22 | 2008-08-13 | 佛山市顺德区顺达船舶工程有限公司 | A pump axis sealing device |
| CN202500774U (en) * | 2011-11-18 | 2012-10-24 | 宜兴优纳特机械有限公司 | Composite sealing device for Roots blower end cover |
| CN103147989A (en) * | 2011-12-07 | 2013-06-12 | 宜兴优纳特机械有限公司 | Double-end-face mechanical sealing device of Roots fan |
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| CN103486045B (en) | 2016-04-13 |
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