CN102242714A - Compound seal device of claw type dry vacuum pump - Google Patents

Compound seal device of claw type dry vacuum pump Download PDF

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Publication number
CN102242714A
CN102242714A CN2010101672629A CN201010167262A CN102242714A CN 102242714 A CN102242714 A CN 102242714A CN 2010101672629 A CN2010101672629 A CN 2010101672629A CN 201010167262 A CN201010167262 A CN 201010167262A CN 102242714 A CN102242714 A CN 102242714A
Authority
CN
China
Prior art keywords
seal
vacuum pump
driving shaft
driven shaft
dry type
Prior art date
Application number
CN2010101672629A
Other languages
Chinese (zh)
Inventor
徐曦
李瑞玲
朱红梅
Original Assignee
北京朗禾科技有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 北京朗禾科技有限公司 filed Critical 北京朗禾科技有限公司
Priority to CN2010101672629A priority Critical patent/CN102242714A/en
Publication of CN102242714A publication Critical patent/CN102242714A/en

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Abstract

The invention belongs to the field of pumps, and relates to a compound seal device of a claw type dry vacuum pump which comprises a motor, a driving shaft and a driven shaft, wherein the driving shaft and the driven shaft are supported on a rack through a bearing pair; the rack is provided with an oil tank; the rack above the oil tank is provided with a seal base seat; the driving shaft and the driven shaft penetrates through the seal base seat; a pump cavity is arranged above the seal base seat; the driving shaft and the driven shaft are provided with skeleton oil seals; and a piston ring seal device is arranged above each skeleton oil seal. Because the inventive design of the compound seal which is combined by a plurality of seal technologies, the volume of the pump after the combination is small, also even though the seal surface of each skeleton oil seal is abraded to the critical state, the conductance flowing through the gas is still very small, and the leakage is still at the acceptance range, the using cost is low, and the device is not required to maintain; the service life is very long, and approaches around ten years; and the seal can be used to other vacuum pumps.

Description

The claw shape dry type vacuum pump composite seal device
Technical field
The invention belongs to pump class field, relate to a kind of claw shape dry type vacuum pump compound seal.
Background technique
Outside framework oil seal or mechanical seal are adopted in the sealing of existing claw shape dry type vacuum pump usually, or the piston ring sealing technique, and reasonable sealing effect is arranged.But also exist following deficiency: reliability is low: after sealing surface is worn down to threshold state, just need repairing, usually at 1 month to 20 months, service cycle is short, most critical be very big uncertainty to be arranged, the operation risk height.Next is the cost height of maintenance: will all disintegrate whole pump usually when needing repairing.Technical ability to the maintenance and repair personnel requires high.Be subjected to speed and temperature limitation in addition, cooling and lubricating requirement height, thus increase extra cost.Medium to sealing has certain requirement.
Summary of the invention
The objective of the invention is to avoid the deficiencies in the prior art to provide a kind of simple in structure, rationally, effectively avoided in the pump chamber gas and the oil vapor of the pumping fluid in material such as water vapor and the fuel tank have the possibility that exchanges.
For achieving the above object, the technological scheme that the utility model is taked is: a kind of claw shape dry type vacuum pump composite seal device, comprise motor, driving shaft, driven shaft, driving shaft and driven shaft by bearing to being supported on the frame, on frame, be provided with fuel tank, be provided with sealed base on the frame above the described fuel tank, driving shaft and driven shaft are located in the sealed base, are provided with pump chamber above sealed base; On described driving shaft and driven shaft, be provided with outside framework oil seal, above outside framework oil seal, be provided with the piston ring packing device.
Further, described piston ring packing device comprises the piston rotating ring that is set on driving shaft and the driven shaft, the outer wall of piston rotating ring is provided with at least one and seals tooth, is provided with and seals the piston ring that tooth matches and is provided with on the sealed base that the sealing tooth is oppositely arranged.
Further, be provided with seal ring between described sealed cover and the described sealed base.
Further, above described piston rotating ring, be provided with sealed cover.
Further, described sealed cover is by at least one sealing tooth setting that matches with the piston rotating ring.
Further, also include to be provided with and mend the nitrogen device at described sealed base middle part.
Further, described benefit nitrogen device is included in cavity that sealed base middle part is provided with and the nitrogen inlet that is connected with described cavity.
The invention has the beneficial effects as follows:
The compound seal that the present invention is combined by multiple sealing technique, it is because design cleverly makes the volume after the combination very little, even and be worn down to the situation of threshold state at the skeleton oil seal face after, the conductance that gas passes through is still very little, and it leaks still in the acceptable scope.So its user cost is low, need not safeguard.Life-span is very long, near about 10 years.This sealing also can be used for other vacuum pump.
Design by compound seal: the strong point by multiple sealing combines, for example labyrinth seal, piston ring sealing, outside framework oil seal, wiper seal, use and above several sealing all is by increasing the purpose that flow resistance reaches sealing, and several sealing does not all exist wearing and tearing little relatively.So the life-span is long, maintenance cost is low; The reliability height, the traditional outside framework oil seal or the working life of mechanical seal, maintenance had very big uncertainty during one month or 20 months, and the risk of operation is very high; The cost height of maintenance: when needing repairing, will all disintegrate whole pump usually.Be not subjected to speed and temperature limitation, extremely low to the cooling and lubricating requirement, need not additional equipment.Technical requirements to the maintenance and repair personnel is low.
Description of drawings
Fig. 1 is a sectional view of the present invention;
Embodiment
Below in conjunction with accompanying drawing principle of the present utility model and feature are described, institute gives an actual example and only is used to explain the utility model, is not to be used to limit scope of the present utility model.
As shown in Figure 1, a kind of claw shape dry type vacuum pump composite seal device, motor 2 drives driving shaft 8 rotations by hitch 3 and coupling 4, driving shaft 8 drives driven shaft 15 by 7 pairs of synchromesh gears, driven shaft 15 and driving shaft 8 synchronous opposite spins, described driving shaft 8 and driven shaft 15 are supported on the frame 19 by bearing, on frame 1, be provided with fuel tank 5, in fuel tank 5, be provided with pumping fluid 6, on the frame 1 above the described fuel tank 5, be provided with sealed base 10, driving shaft 8 is located in the sealed base 10 with driven shaft 15, is provided with pump chamber 17 above sealed base 10; On described driving shaft 8, be provided with first outside framework oil seal 11, on driven shaft 15, be provided with second outside framework oil seal 18, above first outside framework oil seal 11 and second outside framework oil seal 18, be respectively equipped with the piston ring packing device.
Described piston ring packing device comprises the piston rotating ring 16 that is set on driving shaft and the driven shaft, the outer wall of piston rotating ring 16 is provided with at least one sealing tooth, on the sealed base 10 that is oppositely arranged of sealing tooth, be provided with and seal the piston ring 14 that tooth matches and is provided with, above described piston rotating ring 16, be provided with sealed cover 12.Be provided with seal ring 13 between described sealed cover 12 and the described sealed base 10.Described sealed cover 12 is by the setting that matches with piston rotating ring 16 of sealing tooth.Also include to be provided with and mend the nitrogen device at described sealed base 10 middle parts.Described benefit nitrogen device is included in cavity that sealed base middle part is provided with and the nitrogen inlet 19 that is connected with described cavity.Even have pressure reduction with pump chamber 17 interior gases in the fuel tank 5, also be to replenish by the nitrogen in the nitrogen inlet 19.
This composite seal device has very long working life and extreme high reliability, and simple in structure, cost is low, does not need to safeguard that extraordinary using value is arranged.This composite seal device shall not be applied to the dried pump of pawl type but is not limited to the dried pump of pawl type, also can be applicable to the dried pump of twin-screw, other occasion such as mechanical pump.
The above only is preferred embodiment of the present utility model, and is in order to restriction the present invention, within the spirit and principles in the present invention not all, any modification of being done, is equal to replacement, improvement etc., all should be included within the protection domain of the present utility model.

Claims (7)

1. claw shape dry type vacuum pump composite seal device, comprise motor, driving shaft, driven shaft, driving shaft and driven shaft by bearing to being supported on the frame, on frame, be provided with fuel tank, it is characterized in that, be provided with sealed base on the frame above the described fuel tank, driving shaft and driven shaft are located in the sealed base, are provided with pump chamber above sealed base; On described driving shaft and driven shaft, be provided with outside framework oil seal, above outside framework oil seal, be provided with the piston ring packing device.
2. claw shape dry type vacuum pump composite seal device as claimed in claim 1, it is characterized in that, described piston ring packing device comprises the piston rotating ring that is set on driving shaft and the driven shaft, the outer wall of piston rotating ring is provided with at least one and seals tooth, is provided with and seals the piston ring that tooth matches and is provided with on the sealed base that the sealing tooth is oppositely arranged.
3. claw shape dry type vacuum pump composite seal device as claimed in claim 2 is characterized in that, is provided with seal ring between described sealed cover and the described sealed base.
4. claw shape dry type vacuum pump composite seal device as claimed in claim 2 is characterized in that, is provided with sealed cover above described piston rotating ring.
5. claw shape dry type vacuum pump composite seal device as claimed in claim 4 is characterized in that, described sealed cover is by at least one sealing tooth setting that matches with the piston rotating ring.
6. as the arbitrary described claw shape dry type vacuum pump composite seal device of claim 1 to 5, it is characterized in that, also include the benefit nitrogen device that is arranged on described sealed base middle part.
7. claw shape dry type vacuum pump composite seal device as claimed in claim 6 is characterized in that, described benefit nitrogen device is included in cavity that sealed base middle part is provided with and the nitrogen inlet that is connected with described cavity.
CN2010101672629A 2010-05-10 2010-05-10 Compound seal device of claw type dry vacuum pump CN102242714A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2010101672629A CN102242714A (en) 2010-05-10 2010-05-10 Compound seal device of claw type dry vacuum pump

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2010101672629A CN102242714A (en) 2010-05-10 2010-05-10 Compound seal device of claw type dry vacuum pump

Publications (1)

Publication Number Publication Date
CN102242714A true CN102242714A (en) 2011-11-16

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN2010101672629A CN102242714A (en) 2010-05-10 2010-05-10 Compound seal device of claw type dry vacuum pump

Country Status (1)

Country Link
CN (1) CN102242714A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103452809A (en) * 2013-05-16 2013-12-18 淄博泽一真空设备有限公司 Oil tank for claw type dry vacuum pump
CN103453028A (en) * 2013-05-16 2013-12-18 淄博泽一真空设备有限公司 Bearing chamber for claw type dry vacuum pump
CN108431422A (en) * 2015-11-03 2018-08-21 莱宝有限公司 Dry vacuum pump
CN110701045A (en) * 2019-11-22 2020-01-17 海门市晶盛真空设备有限公司 Double-screw vacuum pump

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2793457Y (en) * 2005-02-16 2006-07-05 徐州车氏密封有限公司 T-shaped two-way rotary assembled sealing ring
CN201246189Y (en) * 2008-08-08 2009-05-27 山东联合化工股份有限公司 Steam turbine seal device
CN201344126Y (en) * 2008-11-21 2009-11-11 山东伯仲真空设备有限公司 Oil-less dry type screw vacuum pump
CN201739179U (en) * 2010-05-10 2011-02-09 北京朗禾科技有限公司 Compound sealing device of claw type dry vacuum pump

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2793457Y (en) * 2005-02-16 2006-07-05 徐州车氏密封有限公司 T-shaped two-way rotary assembled sealing ring
CN201246189Y (en) * 2008-08-08 2009-05-27 山东联合化工股份有限公司 Steam turbine seal device
CN201344126Y (en) * 2008-11-21 2009-11-11 山东伯仲真空设备有限公司 Oil-less dry type screw vacuum pump
CN201739179U (en) * 2010-05-10 2011-02-09 北京朗禾科技有限公司 Compound sealing device of claw type dry vacuum pump

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103452809A (en) * 2013-05-16 2013-12-18 淄博泽一真空设备有限公司 Oil tank for claw type dry vacuum pump
CN103453028A (en) * 2013-05-16 2013-12-18 淄博泽一真空设备有限公司 Bearing chamber for claw type dry vacuum pump
CN108431422A (en) * 2015-11-03 2018-08-21 莱宝有限公司 Dry vacuum pump
CN108431422B (en) * 2015-11-03 2019-07-23 莱宝有限公司 Dry vacuum pump
CN110701045A (en) * 2019-11-22 2020-01-17 海门市晶盛真空设备有限公司 Double-screw vacuum pump

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Application publication date: 20111116