CN2117479U - Vacuum oil drain pump - Google Patents
Vacuum oil drain pump Download PDFInfo
- Publication number
- CN2117479U CN2117479U CN 92205480 CN92205480U CN2117479U CN 2117479 U CN2117479 U CN 2117479U CN 92205480 CN92205480 CN 92205480 CN 92205480 U CN92205480 U CN 92205480U CN 2117479 U CN2117479 U CN 2117479U
- Authority
- CN
- China
- Prior art keywords
- impeller
- gear
- pump
- oil drain
- vacuum oil
- 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.)
- Granted
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- Applications Or Details Of Rotary Compressors (AREA)
Abstract
The utility model relates to a vacuum oil drain pump which can be used in a vacuum condition and is composed of an active gear, a passive gear, an impeller, a casing, and a front end cover. The passive gear is made of plastic, and can form relative rotating with a gear shaft. The passive gear and the gear shaft, and the gear shaft and the shaft sleeve can form differential rotating. The active gear is driven by an electric machine, the impeller is rotated by the shaft of the active gear. The impeller rotates and pushes oil to generate dynamic pressure, and the negative-pressure problem of the gear pump inlet in the vacuum container is solved.
Description
A kind of gear pump, the particularly a kind of oil pump that in vacuum vessel, can normally discharge fluid under the condition of high vacuum degree condition that relates to.
At present, the vacuum oil purifier oil pump that oil extraction is used in the high vacuum jar has screw pump, pirate's pump (the circle-arc tooth pump of engagement promptly), gear pump both at home and abroad.With regard to the full depth tooth wheel pump, its inlet capacity is low, general suction vacuum is at 0.058MPa, the degree of vacuum of vacuum vessel under conventional vacuum pump work condition can reach 0.0005Mpa, gear pump produced the Negative Pressure Difference of 0.035Mpa like this between the two, so can not directly be used under the condition of high vacuum degree condition.Use it must increase vacuum tank, a jar interior oil level is improved, it is poor to reduce the oil pump entrance negative pressure, just can make the oil pump proper functioning.But cause the vacuum oil purifier structure huge, inapplicable like this.In addition under the oil pump inlet fluid negative pressure condition, oil pump cisco unity malfunction, easy to wear, noise aggravation.
The purpose of this utility model is to provide a kind of volume little, in light weight, makes simply, under the condition of high vacuum degree condition, does not need to improve oil level, can make oil pump inlet oil liquid pressure be tending towards appropriateness, makes the vacuum oil drain pump of oil pump energy proper functioning.Mute significantly when the purpose of this utility model is also that this pump is worked under the condition of high vacuum degree condition is that a kind of noise is very low, does not have the vacuum oil drain pump of harm noise.
Its implementation of task of the present utility model is improved on the basis of full depth tooth wheel pump and is realized.Improvement is characterised in that has increased the supercharging impeller on the pump housing, so that oil pump inlet oil liquid pressure increases.Impeller is by driving gear shaft drive work, and impeller places in the impeller active chamber.The impeller active chamber is communicated with gear pump operating on low voltage chamber, and the fluid inlet of impeller active chamber places in the vacuum vessel.Be processed with running clearance between driven gear and the gear shaft, gear and gear shaft can relatively rotate, and also can relatively rotate between gear shaft two ends and the axle sleeve.Under the different pressures condition, can differentially rotate between driven gear and gear shaft and gear shaft and the axle sleeve like this, and reduced the rotational noise of gear shaft.The technology that driven gear is broken the normal procedure and made with metal adopts plastics to manufacture.Weakened intermetallic impact noise so on the one hand, the performance of utilizing plastics sound absorption property to be better than metal has on the other hand further reduced the operational noise of pump.Driving gear shaft passes axle sleeve and there is an elongated segment axle at pump protecgulum place, and impeller is contained in the prolongation axial end.Driving gear and impeller concentric.The active chamber of impeller is located on the pump protecgulum that the collar is housed, and the collar and impeller tip have the working clearance.Install at 30 ° of angles of middle sheet inclination, and it enters the mouth towards oil pump fluid to the Driving force working surface that fluid produces.
The utility model oil drain pump is the stable and reliable working performance under the high vacuum condition in vacuum vessel.Strengthen the working life of oil pump, greatly reduced operational noise.Noise is reduced to 78 decibels by 95 decibels of original gear pump.Its oil extraction ability can be according to the selected design of the difference of degree of vacuum, and it makes simple, is convenient to promote.
Provide embodiment of the present utility model below by accompanying drawing
Fig. 1 is a plan view of the present utility model.
Fig. 2 is an A-A sectional view among Fig. 1.
1 motor, 2 cock wheels, 3 supports, 4 oil sealings, 5O type figure, 6 driving gears, 7 driven gears, 8 gear shafts, 9 axle sleeves, 10 pump protecgulums, 11 prolong axle, 12 impellers, 13 back of the body caps, 14 housings, 15 back-up rings, 16 seam middle covers, 17 shaft-cups, 18 vacuum vessels, 19 fluid, 20 axle sleeves, I snout cavity, II outlet plenum among the figure.
Referring to accompanying drawing.Vacuum oil drain pump of the present utility model is installed on the vacuum vessel (18) by support (3) by cock wheel (2) driving pinion axle (prolonging axle 11) oil drain pump and motor (1) by the output shaft of motor (1), and the vacuum oil drain pump places vacuum vessel (18) inside.The impeller of vacuum oil drain pump (12) promotes the snout cavity (I) that fluid (19) enters pump protecgulum (10), enters simultaneously in the snout cavity (I) of housing (14), discharges under gear (6,7) effect then.Being contained in the rotatory force that prolongs the impeller (12) on the axle (11) is to be provided by the axle of motor (1) by driving gear (6).Impeller (12) is fixed on back of the body cap and prolongs on the axle (11).The rotation concentricity of driving gear (6) and impeller (12) is guaranteed by seam middle cover (16) and pump protecgulum (10) location.The oil pump sealing is leaned on.Type circle (5) and oil sealing (4) guarantee.Oil sealing (4) fixedly prevents to move axially by back-up ring (15).
The utility model not only limits to the foregoing description, as prolonging upward installation driving gear of axle (11), also belongs to one of the utility model example by driving gear impeller (12) work.
Claims (8)
1, a kind of motor output shaft passes through cock wheel driving pinion axle, main, running clearance is arranged between passive tooth wheel shaft and the axle sleeve, driving gear and driven gear engagement also are contained in the housing, driving gear drives the driven gear rotation and to the vacuum oil drain pump of fluid supercharging, it is characterized in that being equipped with on the pump housing supercharging impeller, impeller is by driving gear shaft drive, impeller places in the impeller active chamber, the impeller active chamber is communicated with gear pump operating on low voltage chamber, has running clearance between driven gear and the gear shaft, driven gear and gear shaft can relatively rotate, and can differentially rotate between driven gear and gear shaft and gear shaft and the axle sleeve.
2, vacuum oil drain pump according to claim 1 is characterized in that driven gear is made of plastics.
3, vacuum oil drain pump according to claim 1 and 2 is characterized in that driving gear shaft passes axle sleeve and there is an elongated segment axle at pump protecgulum place, and impeller is contained in the prolongation axial end, and impeller blade has some.
4, according to claim 1 or 2 or 3 described vacuum oil drain pumps, it is characterized in that driving gear and impeller concentric.
5, according to claim 1 or 2 or 3 described vacuum oil drain pumps, it is characterized in that the impeller active chamber is located on the pump protecgulum.
6, vacuum oil drain pump according to claim 4 is characterized in that the impeller active chamber is located on the pump protecgulum.
7, vacuum oil drain pump according to claim 5 is characterized in that blade enters the mouth towards oil pump fluid to the working surface that fluid produces thrust.
8, vacuum oil drain pump according to claim 6 is characterized in that blade enters the mouth towards oil pump fluid to the working surface that fluid produces thrust.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92205480 CN2117479U (en) | 1992-03-25 | 1992-03-25 | Vacuum oil drain pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92205480 CN2117479U (en) | 1992-03-25 | 1992-03-25 | Vacuum oil drain pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2117479U true CN2117479U (en) | 1992-09-30 |
Family
ID=4951648
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92205480 Granted CN2117479U (en) | 1992-03-25 | 1992-03-25 | Vacuum oil drain pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2117479U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101403382B (en) * | 2008-11-05 | 2011-01-12 | 北京航空航天大学 | Gear pump for micro-miniature turbojet engine |
| CN103696959A (en) * | 2013-12-10 | 2014-04-02 | 无锡威孚精密机械制造有限责任公司 | Gear pump device |
| CN107448418A (en) * | 2017-06-01 | 2017-12-08 | 武汉船用机械有限责任公司 | A kind of vane pump |
| CN108138763A (en) * | 2015-10-12 | 2018-06-08 | 派克汉尼芬公司 | Blade gear pumps |
| CN110685903A (en) * | 2019-11-19 | 2020-01-14 | 兰州理工大学 | Hydraulic motor gear pump with impeller pressurizing liquid supply at inlet |
-
1992
- 1992-03-25 CN CN 92205480 patent/CN2117479U/en active Granted
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101403382B (en) * | 2008-11-05 | 2011-01-12 | 北京航空航天大学 | Gear pump for micro-miniature turbojet engine |
| CN103696959A (en) * | 2013-12-10 | 2014-04-02 | 无锡威孚精密机械制造有限责任公司 | Gear pump device |
| CN108138763A (en) * | 2015-10-12 | 2018-06-08 | 派克汉尼芬公司 | Blade gear pumps |
| US10995751B2 (en) | 2015-10-12 | 2021-05-04 | Pmc Liquiflo Equipment Co., Inc. | Lobe gear pump with inducer assembly and centrifugal pump having one fluid flow path |
| CN107448418A (en) * | 2017-06-01 | 2017-12-08 | 武汉船用机械有限责任公司 | A kind of vane pump |
| CN107448418B (en) * | 2017-06-01 | 2019-09-20 | 武汉船用机械有限责任公司 | A kind of vane pump |
| CN110685903A (en) * | 2019-11-19 | 2020-01-14 | 兰州理工大学 | Hydraulic motor gear pump with impeller pressurizing liquid supply at inlet |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |