CN203783898U - Seal structure of dry vacuum pump - Google Patents
Seal structure of dry vacuum pump Download PDFInfo
- Publication number
- CN203783898U CN203783898U CN201420191935.8U CN201420191935U CN203783898U CN 203783898 U CN203783898 U CN 203783898U CN 201420191935 U CN201420191935 U CN 201420191935U CN 203783898 U CN203783898 U CN 203783898U
- Authority
- CN
- China
- Prior art keywords
- gas
- vacuum pump
- high pressure
- cooled
- dry vacuum
- Prior art date
- Legal status (The legal status 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 status listed.)
- Expired - Lifetime
Links
- 238000001816 cooling Methods 0.000 claims abstract description 26
- 238000010790 dilution Methods 0.000 claims description 25
- 239000012895 dilution Substances 0.000 claims description 25
- 238000012856 packing Methods 0.000 claims description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 238000007789 sealing Methods 0.000 claims description 5
- 238000012423 maintenance Methods 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 41
- 238000010586 diagram Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000000112 cooling gas Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009795 derivation Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 210000004907 gland Anatomy 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- NHDHVHZZCFYRSB-UHFFFAOYSA-N pyriproxyfen Chemical compound C=1C=CC=NC=1OC(C)COC(C=C1)=CC=C1OC1=CC=CC=C1 NHDHVHZZCFYRSB-UHFFFAOYSA-N 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Landscapes
- Applications Or Details Of Rotary Compressors (AREA)
Abstract
The utility model discloses a seal structure of a dry vacuum pump. The vacuum pump mainly comprises a shell, a pair of spiral rotors, a mechanical seal component and a high-voltage end plate, wherein the dry vacuum pump is provided with a motor which drives the spiral rotors; an air exhaust channel located on the high-voltage end plate is connected with an exhaust pipe and in series with a water-cooled primary cooler, and thus the high-temperature gas in the dry vacuum pump can be cooled by the water-cooled primary cooler preliminarily; moreover, the gas can be finally cooled by a water-cooled secondary cooler which is connected with the water-cooled primary cooler so that the gas can be cooled to the temperature for cooling again; the gas cools the mechanical seal component through an inlet channel to greatly reduce the damage chance of the mechanical seal component, prolong the service life of the mechanical seal component and reduce the overall maintenance cost.
Description
Technical field
The utility model relates to a kind of dry vacuum pump packing structure, refers in particular to a kind of vacuum pump pressure of utilizing poor, the self-circulation cooling system of recovery section gas, and the dry vacuum pump packing structure to mechanical shaft seal assembly effective temperature-reducing.
Background technique
Press, vacuum pump is often used on chemical industry process apparatus, manufactures the environment of vacuum, refers to shown in Fig. 6 the generalized section of prior art dry vacuum pump.Dry vacuum pump 7 is mainly by housing 70, a pair of helical rotor 71, a pair of moving, the mechanical shaft seal assembly 72 of stationary ring, high pressure end plate 73, a pair of synchromesh gear 74 and bearing 75 form, the a pair of helical rotor 71 of its mode of action inside utilizes motor to drive rotation that gas compression is discharged outside dry vacuum pump 7, to produce the state of vacuum, therefore the quality of vacuum manufacturing effect and helical rotor 71 have close relationship, and the mechanical shaft seal assembly 72 being installed on dry vacuum pump 7 guarantees that for blocking gas and vacuum oil vacuum pump runs well, in addition, and each helical rotor 71 needs installing synchromesh gear 74, therefore when helical rotor 71 connecting motors of one of them and while being driven to rotate, by synchromesh gear 74, be meshed and can keep appropriate gap for helical rotor 71, the synchronous rotation that rotation direction is contrary, therefore, helical rotor 71 and mechanical shaft seal assembly 72 are except affecting the usefulness of dry vacuum pump 7, also can affect its working life and cost.
Dry vacuum pump 7 can produce heat energy because of internal gas compression in the running, if now can not effectively heat energy be left, likely can cause the damage of helical rotor 71 and mechanical shaft seal assembly 72, the situation that for example helical rotor 71 interferes in the running because of thermal expansion, or mechanical shaft seal 72 produces not foot phenomenon of gaps because high-temperature indirect affects sealing effect and bearing 75 parts, cause dry vacuum pump 7 faults or leakage problem to occur, generally in existent technique, apply to cooling spiral rotor 71 and by gas, pass into that housing 70 is interior to carry out cooling to helical rotor 71, conventional gas is nitrogen, during use, must continue to pour into gas so long-term accumulated raises the cost relatively.
In view of this, the creator of this case is according to the experience accumulation of research for many years, and arrange in pairs or groups the intention of self and constantly attempt under, and then develop a kind of a kind of vacuum pump and cooling structure thereof that can effectively improve defect mentioned in above-mentioned existent technique.
Summary of the invention
Technical problem to be solved in the utility model is: utilize exhaust passage pressure to be greater than dilution suction port, form a self-circulation cooling system, again cooling through water cooled secondary cooler by distributing again portion gas after the preliminary cooling of cooler of the gas permeation water-cooled of vacuum pump internal compression, and again cooling gas is lowered the temperature to mechanical shaft seal assembly via this air inlet channel, and then can significantly reduce the chance that mechanical shaft seal assembly damages, and increase the service life and reduce whole maintenance cost.
For reaching above-mentioned purpose, a kind of dry vacuum pump packing structure of the utility model, comprises a housing, and rotor chamber, intakeport and at least one dilution suction port communicating with this rotor chamber of a pair of helical rotor held in this housing formation one; A pair of helical rotor, this helical rotor defines respectively a low voltage side axial region and a high pressure side axial region in two ends, and low voltage side axial region and high pressure side axial region are respectively by bearings, and this low voltage side axial region system is hubbed at this housing and this helical rotor is arranged to this rotor chamber; One mechanical shaft seal assembly, this mechanical shaft seal assembly comprises: a rotating ring, this moving ring sleeve is located at this high pressure side axial region; Two stationary rings, respectively this stationary ring is sheathed on this high pressure side axial region and is positioned at this rotating ring both sides; One high pressure end plate, this high pressure end plate system is installed in this housing end face makes this rotor chamber be sealing dress state, and this high pressure end plate form one for be pivoted this high pressure side axial region accommodating this rotating ring and respectively this stationary ring containing space and form an exhaust passage communicating with this rotor chamber.
According to an embodiment of the present utility model, more comprise the outlet pipe of this exhaust passage of connection.
According to an embodiment of the present utility model, more comprise cooler of a water-cooled being connected with this outlet pipe.
According to an embodiment of the present utility model, more comprise the dilution suction tude of this gas-entered passageway of connection.
According to an embodiment of the present utility model, wherein this dilution suction port arranges a connecting tube being communicated with this gas-entered passageway.
According to an embodiment of the present utility model, more comprise that one is connected with cooler of this water-cooled and gas is again cooling, this gas enters the water cooled secondary cooler of this rotor chamber via this dilution suction tude and this gas-entered passageway by this connecting tube and this dilution suction port.
The beneficial effects of the utility model are: cooled gas also can enter rotor chamber and the cooling and dilution internal gas to helical rotor by connecting tube and dilution suction port, and then improve because high-temperature indirect affects vacuum pump periphery part generation thermal expansion, cause producing the gap problem that foot phenomenon does not cause vacuum pump gas and vacuum oil to leak.
Utilizing helical rotor to be hubbed at high pressure side axial region in high pressure end plate sees through vacuum pump gas and the vacuum oil that the stationary ring that is set in the rotating ring on the axial region of high pressure side and is positioned at its both sides can effectively intercept rotor chamber and leaks.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the utility model is further described:
Fig. 1 is the schematic diagram of the utility model vacuum pump.
Fig. 2 is the schematic diagram of the utility model vacuum pump and cool cycles.
Fig. 3 is the exhaust passage generalized section of the utility model vacuum pump.
Fig. 4 is the gas-entered passageway generalized section of the utility model vacuum pump.
Fig. 5 is the path schematic diagram that the utility model vacuum pump high-temperature gas is discharged and cooling rear gas circulation reclaims.
The generalized section of Fig. 6 prior art dry vacuum pump.
Embodiment
For reaching above-mentioned purpose and effect, technological means and structure that this is novel adopted, just this novel preferred embodiment of hereby drawing illustrates that its features and functions is as follows in detail, in order to do profit, understands completely.
By specific instantiation, mode of execution of the present utility model is described below, the personage who is familiar with this skill can understand advantage of the present utility model and effect easily by content disclosed in the present specification.The utility model can also other different mode be implemented, and, under the category not disclosing departing from the utility model, can give different modifications and change that is.
Notice, appended graphic the illustrated structure of this specification, ratio, size etc., equal contents in order to coordinate specification to disclose only, for understanding and the reading of being familiar with the personage of this skill, not in order to limit the enforceable qualifications of the utility model, therefore the technical essential meaning of tool not, the adjustment of the modification of any structure, the change of proportionate relationship or size, do not affecting under the effect that the utility model can produce and the object that can reach, all should still drop on the technology contents that the utility model discloses and obtain in the scope that can contain.
Referring to shown in Fig. 1 and Fig. 2, is the schematic diagram of the utility model vacuum pump and the schematic diagram of vacuum pump and cool cycles.A kind of dry vacuum pump packing structure of the utility model, vacuum pump 1 is mainly by housing 10, a pair of helical rotor 11, mechanical shaft seal assembly 12 and high pressure end plate 13, at the high pressure side of vacuum pump 1 axial region 112, can install a motor (drawing does not show) that can drive helical rotor 11, its middle shell 10 formation one can be held the rotor chamber 100 of a pair of helical rotor, be positioned near the intakeport (drawing does not show) of low voltage terminal side shaft portion 110, at least one dilution suction port 106 communicating with this rotor chamber, this defines respectively a low voltage side axial region 110 and a high pressure side axial region 112 in two ends to helical rotor 11, low voltage side axial region 110 and high pressure side axial region 112 are respectively by bearings (drawing does not show), and low voltage side axial region 110 is hubbed at this housing 10 and this helical rotor 11 is arranged to this rotor chamber 100, aforesaid mechanical shaft seal assembly 12 comprises: a rotating ring 120 is sheathed on high pressure side axial region 112, two stationary rings 122 are located at respectively in installation high-voltage end plate and are positioned at this rotating ring 120 both sides, 13 of high pressure end plates are installed in these housing 10 end faces and make this rotor chamber 100 be sealing dress state in addition, between housing and high pressure end plate, can adopt O type ring sealing (drawing does not show), and this high pressure end plate 13 forms one for these high pressure side axial region 112 also accommodating these rotating rings 120 and the respectively containing space 130 of this stationary ring 122 that are pivoted, one exhaust passage 102 communicating with this rotor chamber 100 and a gas-entered passageway 104 communicating with this containing space 130.Aforementioned exhaust passage 102 is mainly connected with outlet pipe 2, and outlet pipe 2 is connected one for the cooler 3 of water-cooled that reduces gas temperature, cooler of water-cooled 3 connecting tee pipes, the pressurized gas that vacuum pump is discharged in one end is discharged into atmosphere, and the other end bypass tube is connected to water cooled secondary cooler 4.Gas-entered passageway 104 is connected with water cooled secondary cooler 4 and joins for the dilution suction tude 5 that imports cooled gas, and gas-entered passageway 104 the other ends are connected to and connecting tube 6 can enter this rotor chamber 100 via dilution suction port 106, utilize exhaust passage 102 pressure to be greater than dilution suction port 106, form a self-circulation cooling system.
Separately referring to shown in Fig. 3 and Fig. 4, is the exhaust passage generalized section of the utility model vacuum pump and the gas-entered passageway generalized section of vacuum pump.Exhaust passage 102 in Fig. 3 is formed in high pressure end plate 13 and is mainly communicated with rotor chamber 100 and the high-temperature gas in rotor chamber 100 is seen through to outlet pipe 2 is sent to outside and lowers the temperature, gas-entered passageway 104 in Fig. 4 is formed at high pressure end plate 13 and does not communicate with rotor chamber 100, through dilution suction tude 5, the gas-entered passageway 104 by high pressure end plate 13 belows enters gas after cooling, now gas can and first be lowered the temperature to rotating ring 120 and this stationary ring 122 through aforementioned each containing space 130, then by top derivation, through connecting tube 6, via dilution suction port 106, entering this rotor chamber 100 must lower the temperature for helical rotor 11.
With reference to shown in figure 5, be the path schematic diagram that the utility model vacuum pump high-temperature gas is discharged and cooling rear gas circulation reclaims simultaneously.Arrow is gas conduct route, due to helical rotor 11 heat that work done produces to gas compression in the running, the outlet pipe 2 connecting via exhaust passage 102 through exhaust passage 102 is transported to cooler 3 of water-cooled, cooler 3 of water-cooled is separately equiped with three-way pipe can drain into atmosphere by the gas of the preliminary cooling of part, remaining part gas must carry out reducing temperature twice through water cooled secondary cooler 4 again, make gas temperature can meet the user demand of vacuum pump 1, complete the gas of cooling by the cooling rotating ring 120 of dilution suction tude 5 and gas-entered passageway 104 and stationary ring 122, cooling mechanical gland seal assembly 12, again via entering dilution suction port 106 connecting tube 6, because dilution suction port 106 communicates with rotor chamber 100, therefore and then cryogenic gas can be imported to it is inner and then continue to carry out internal helicoid rotor 11 and do to lower the temperature, utilize exhaust passage 102 pressure to be greater than dilution suction port 106, form a self-circulation cooling system.
The utility model is mainly again cooling through water cooled secondary cooler 4 by distributing portion gas after the preliminary cooling of cooler of the gas permeation water-cooled of vacuum pump 1 inside 3 again, in other words, when the gas in aforementioned is tentatively lowered the temperature through cooler 3 of water-cooled, its hot-gas temperature of discharging after overcompression can be down to close to cooler of water-cooled 3 internal cooling coolant-temperature gages, carry out gas when again cooling, will be down to again closer to water cooled secondary cooler 4 internal cooling coolant-temperature gages through the gas of water cooled secondary cooler 4, and again cooling gas is lowered the temperature via 104 pairs of mechanical shaft seal assemblies of this gas-entered passageway 12, and then can significantly reduce the chance that mechanical shaft seal assembly 12 damages, and increase the service life and reduce whole maintenance cost.
Separately, cooled gas also can enter rotor chamber 100 and the cooling and dilution internal gas to helical rotor 11 by connecting tube 6 and dilution suction port 106, and then improve because high-temperature indirect affect vacuum pump 1 bearing parts and produce thermal expansion, cause producing gap not foot phenomenon cause vacuum pump failure and leakage problem generation.
Utilize helical rotor 11 to be hubbed at high pressure side axial region in high pressure end plate 13 112 simultaneously see through that the stationary ring 122 that is set in the rotating ring 120 on high pressure side axial region 122 and is positioned at its both sides can effectively intercept the process gas of rotor chamber 100 and the vacuum oil of gear-box 15 pollutes mutually again.
Although the utility model discloses as above with preferred embodiment; so it is not intended to limit the utility model; anyly have the knack of this skill person; within not departing from spirit and scope of the present utility model; when doing a little change and retouching, therefore protection domain of the present utility model is when being as the criterion depending on the accompanying claim person of defining.
Claims (6)
1. a dry vacuum pump packing structure, is characterized in that: comprise
One housing, this housing forms a rotor chamber and at least one dilution suction port that communicates with this rotor chamber;
A pair of helical rotor, this helical rotor defines respectively a low voltage side axial region and a high pressure side axial region in two ends, and this low voltage side axial region is hubbed at this housing and this helical rotor is arranged to this rotor chamber;
One mechanical shaft seal assembly, this mechanical shaft seal assembly comprises:
One rotating ring, this moving ring sleeve is located at this high pressure side axial region;
Two stationary rings, respectively this stationary ring is sheathed on this high pressure side axial region and is positioned at this rotating ring both sides; And
One high pressure end plate, this high pressure end plate is installed in this housing makes this rotor chamber be sealing dress state, and this high pressure end plate forms one for this high pressure side axial region accommodating this rotating ring and this stationary ring containing space, exhaust passage and gas-entered passageway that communicates with this containing space that communicates with this rotor chamber respectively of being pivoted.
2. dry vacuum pump packing structure according to claim 1, is characterized in that: more comprise this exhaust passage outlet pipe of a connection.
3. dry vacuum pump packing structure according to claim 2, is characterized in that: more comprise the cooler of water-cooled that is connected with this outlet pipe.
4. dry vacuum pump packing structure according to claim 3, is characterized in that: more comprise this gas-entered passageway dilution suction tude of a connection.
5. according to a claim 4 described dry vacuum pump packing structure, it is characterized in that: wherein this dilution suction port arranges one and is communicated with connecting tube with this gas-entered passageway.
6. according to a claim 5 described dry vacuum pump packing structure, it is characterized in that: more comprise that one is connected with cooler of this water-cooled and gas is again cooling, this gas enters this rotor chamber water cooled secondary cooler via this dilution suction tude and this gas-entered passageway by this connecting tube and this dilution suction port.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420191935.8U CN203783898U (en) | 2014-04-18 | 2014-04-18 | Seal structure of dry vacuum pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420191935.8U CN203783898U (en) | 2014-04-18 | 2014-04-18 | Seal structure of dry vacuum pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203783898U true CN203783898U (en) | 2014-08-20 |
Family
ID=51320091
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420191935.8U Expired - Lifetime CN203783898U (en) | 2014-04-18 | 2014-04-18 | Seal structure of dry vacuum pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203783898U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106989033A (en) * | 2017-05-19 | 2017-07-28 | 福州百特节能科技有限公司 | Electric screw silence compression aspiration pump |
-
2014
- 2014-04-18 CN CN201420191935.8U patent/CN203783898U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106989033A (en) * | 2017-05-19 | 2017-07-28 | 福州百特节能科技有限公司 | Electric screw silence compression aspiration pump |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: SHANGHAI HANBELL PRECISE MACHINERY CO., LTD. Free format text: FORMER OWNER: HANBELL PRECISE MACHINERY CO., LTD. Effective date: 20150129 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: TAIWAN, CHINA TO: 200000 JINSHAN, SHANGHAI |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20150129 Address after: 200000 Shanghai city Jinshan District Fengjing Industrial Development Zone, Feng Ting Road No. 8289 Patentee after: SHANGHAI HANBELL PRECISE MACHINERY Co.,Ltd. Address before: No. three, No. 5 Industrial Road, Guanyin Township, Taoyuan County, Taiwan, China Patentee before: HANBELL PRECISE MACHINERY Co.,Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20140820 |
|
| CX01 | Expiry of patent term |