CN201896760U - High-temperature magnetic pump - Google Patents
High-temperature magnetic pump Download PDFInfo
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- CN201896760U CN201896760U CN2010205407079U CN201020540707U CN201896760U CN 201896760 U CN201896760 U CN 201896760U CN 2010205407079 U CN2010205407079 U CN 2010205407079U CN 201020540707 U CN201020540707 U CN 201020540707U CN 201896760 U CN201896760 U CN 201896760U
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- bearing
- bearing shell
- transmission shaft
- temperature magnetic
- magnet coupler
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Abstract
The utility model relates to a high-temperature magnetic pump which comprises a pump body, an impeller, an impeller shaft, a sliding bearing, a magnetic coupling, an isolating sleeve and a transmission shaft, wherein the sliding bearing consists of a bearing bush and a bearing seat; the magnetic coupling consists of an inner magnetic coupling and an outer magnetic coupling; the inner magnetic coupling and the outer magnetic coupling are respectively fixed at the ends of the impeller shaft and the transmission shaft; a bearing box is sleeved on the transmission shaft; the transmission shaft is communicated with the middle part of the bearing box and is fixed on two side walls of the bearing box through rolling bearings; and the bearing box is of a closed structure with the bottom used for containing lubricating fluid, and a bracket and an oil inlet are arranged on the bearing box. With the adoption of the transmission structure, the lubricating fluid can be injected into a box body of the bearing box for lubricating the rolling bearings, the heat dissipation effect can be achieved, the rolling bearings at two sides have a greater axial space, the positioning accuracy is high, and the jumping caused by unbalanced running can be greatly reduced by the transmission shaft; moreover, under the high-temperature working condition, even if the high heat is transferred to a supporting bearing, the bearing achieves excellent heat dissipation and lubrication owing to an oil bath lubrication method, therefore, the service life and high temperature resistance of the magnetic pump are improved.
Description
Technical field
The utility model relates to a kind of High-temperature Magnetic Pump.
Background technique
At present, in industries such as chemical industry, oil, printing and dyeing, medicine, food, plating, magnetic drive pump is widely used, in order to liquid such as transfer oil and chemical mediators, the various characteristics of these media just requires that magnetic drive pump is corrosion-resistant, high temperature resistant, high pressure resistant, zero leakage; Outer magnet coupler for traditional magnetic drive pump, two kinds of means of fixation are generally arranged, a kind of is directly to be installed on motor shaft, usually cry direct-connected, another kind is a suspension-type, for example the Chinese patent of " multi-tube High-temperature Magnetic Pump " (patent No. ZL 200920035791.6) by name promptly is to adopt the suspension Placement; Direct-connected because there is the limitation of heat radiation, generally only be used for small-power magnetic drive pump structure, and high-power magnetic drive pump adopts suspension-type usually; For traditional suspension-type magnetic drive pump, its suspension frame structure adopts structure disclosed in the aforementioned patent mostly, is subjected to the constraint of this suspension frame structure, and the wheelbase on it between two secondary rolling bearings is generally all too small, and lubricating of bearing all adopted grease lubrication; Because outer magnet coupler is suspended in an end of transmission shaft, itself will deflect this mounting structure because of action of gravity, under worst hot case, too small distance between bearings, more can the work harder imbalance, in addition, grease lubrication easily allows bearing be in the hot operation state for a long time and reduces working life, even makes bearing location actual effect; For 24 hours continuous applying working conditions of needs, the average out to 8 months in working life of above-mentioned magnetic drive pump, but that the general overhaul phase of chemical industry arranges is annual, therefore all not ideal enough for above-mentioned two kinds of structures.
Summary of the invention
The main main purpose of the utility model provides a kind of High-temperature Magnetic Pump, it adopts the drive mechanism of bearing housing, make magnetic drive pump transmission at high temperature more steady, and can carry out bath lubrication and good heat radiation to the rolling bearing on the transmission shaft thus, make transmission shaft be difficult for the location actual effect; This structure can significantly improve the Maximum operating temperature and the working life of magnetic drive pump.
Another purpose of the present utility model is to improve the Location accuracy of transmission shaft under hot operation, thereby can reduces the positioning accuracy request of impeller shaft sliding bearing, the working life of further improving magnetic drive pump thus.
Above-mentioned technical problem of the present utility model is mainly solved by following technical proposals: a kind of High-temperature Magnetic Pump, the sliding bearing that comprises the pump housing, impeller, impeller shaft, constitutes by bearing shell and bearing support, the magnet coupler, separation sleeve and the transmission shaft that constitute by interior magnet coupler and outer magnet coupler, interior magnet coupler, outer magnet coupler are separately fixed at the end of impeller shaft, transmission shaft, be arranged with bearing housing on the described transmission shaft, transmission shaft connects this bearing housing middle part, and is fixed on this bearing housing two side by rolling bearing; Described bearing housing is the enclosed construction that the bottom can hold Lubricants, which is provided with carriage, filler opening.This drive mechanism of bearing housing can inject the lubricated rolling bearing of Lubricants and can obtain radiating effect in the casing; This drive mechanism also makes the rolling bearing of both sides have bigger axial spacing, Location accuracy is higher, transmission shaft can lower uneven the beating of bringing of running greatly, and when worst hot case, even high transmission of heat is to block bearing, bearing also obtains good heat radiation and lubricated because of the bath lubrication mode, thereby improves the working life and the heat-resisting ability of magnetic drive pump; Because transmission shaft Location accuracy height, outer magnet coupler on it also just obtains rotary motion trace more stably, circular runout is little, correspondingly, under magnetic force, the radial location required precision of interior magnet coupler can reduce, and that is to say that requirement precision of slide bearing on the impeller shaft can obtain reduction to a certain degree; Reduction to the sliding bearing required precision on the pump shaft, apparently, can reduce the manufacture cost of magnetic drive pump, the more important thing is, the reduction of sliding bearing required precision just means that sliding bearing can allow bigger wear extent, also can use the longer time, because sliding bearing is the easily damaged parts that causes the magnetic drive pump fault, so can significantly improve the working life of magnetic drive pump.
For avoiding the Lubricants in the bearing housing casing to leak outside, as preferably, be provided with end cap and the dust cover that is sheathed on the transmission shaft outside the described rolling bearing, this end cap is provided with the seal ring that constitutes radial seal with the transmission shaft circumference.
For the consideration that improves safety, as preferably, described outer magnet coupler is arranged with protection cylinder outward; This protection cylinder is a non-metallic material, and the one end is fixed on the bearing housing sidewall, the other end is resisted against on the bearing support sidewall.This nonmetal structure plays heat-blocking action preferably, and the high temperature that can reduce pump housing end is delivered to the heat on the rolling bearing.
Because outer magnet coupler is suspended in an end of transmission shaft, based on the consideration of usage space and stress balance, as preferably, is fixed on the rolling bearing of bearing housing two side, spacing is about 0.5-1.5 times of outer magnet coupler axial length.This structure can make outer magnet coupler obtain the preferred positioning precision, and the preferable smoothness of acquisition that is in operation, and especially obtains less radial deflection.
As preferably, described bearing shell excircle is provided with 1-6 limit dais that is used to prevent its rotation, and this limit dais is platform or boss, is evenly distributed on the bearing shell excircle; Be provided with platform or the groove adaptive in the bearing shell mounting hole on the bearing support with limit dais.Cooperation by the bearing shell mounting hole, bearing shell is circumferentially located by the arc surface on the circumference, limit dais forms circumferentially spacing, can overcome the circumferential friction torque that the impeller shaft high speed rotating brings thus, bearing shell can not produced relative rotation in bearing support, avoided the phenomenon of bearing shell transfer when interference is not enough of conventional construction, also the situation of grinding away and losing efficacy with regard to the bearing support of having avoided transfer phenomenon to cause.
As preferably, the diameter of described bearing shell excircle is less than the diameter of the bearing shell mounting hole on the bearing support; Be provided with the gap compensating ring between bearing shell and bearing support, this gap compensating ring is the elastomer of collapsible distortion, and outside is resisted against bearing shell periphery, bearing shell mounting hole inwall respectively in it.Bearing shell excircle diameter is less than the bearing shell mounting hole diameter on the bearing support, make between bearing shell and the mounting hole and form the clearance for expansion, the clearance for expansion provides the space of expanded by heating for bearing shell and bearing support mounting hole, avoid the thermal expansion distortion that bearing shell is formed excessive pressure stress, be easy to the broken problem that lost efficacy thereby overcome conventional construction bearing shell when temperature rises; In addition, this structure that is provided with the gap makes the assembling of bearing shell and replacing operation simpler, easy, and bearing shell can not push impaired in assembly process.The gap compensating ring of collapsible distortion is filled between bearing shell and the bearing shell mounting hole, and its elastic force is applied on the bearing shell circumference; No matter operating temperature raises is still reduced, and under the elastic force effect of gap compensating ring, bearing shell keeps coaxial with the bearing shell mounting hole all the time; Therefore, the structure of gap compensating ring is set,, just make bearing shell have the ability of automatic centering, that is the bearing shell center remains at and the supercentral ability of bearing shell mounting hole as long as control the elastic force of gap compensating ring well.In addition; the gap compensating ring has certain elasticity; play good cushioning effect in that magnetic drive pump is in service; improved the ability of the anti-vibrating and impact of bearing shell; bearing shell is played a protective role; especially the bearing shell made of brittle material, this cushioning effect can significantly improve integrally-built impact resistance.
When operating temperature raises, bearing shell and bearing support temperature distortion, the bearing shell external diameter enlarges, the bearing shell mounting hole on the bearing support shrinks, two is superimposed, bearing shell easily and form bigger magnitude of interference between the bearing support, excessive magnitude of interference easily makes bearing shell impaired; For avoiding this kind situation, as preferably, the diameter of described bearing shell excircle and bearing shell mounting hole inner circumference poor, bearing shell excircle and bearing shell mounting hole inner circumference radial heat distortion amount sum when being equivalent to maximum operation temperature.This structure at high temperature, can not form interference fit between bearing shell and the bearing support, perhaps forms interference fit, but its magnitude of interference can be not excessive yet, thereby has further protected not temperature distortion of bearing shell damage.
As preferably, described separation sleeve comprises the body that is made of bottom and tube portion, and is located at the fixed connection apparatus on the body, and described bottom sealing and fixing is in the bottom of tube portion; Described body is two-layer or two-layer above structure, and it comprises skin and the internal layer of being made by resistant material.Tube portion is sheathed between the inside and outside magnetic shaft coupling, again by the fixed connection apparatus on the body, is sealedly and fixedly connected with the outside formation; The skin that adopts resistant to elevated temperatures high strength nonmetallic material to make, can be separation sleeve voltage endurance capability preferably is provided, the internal layer that contacts with fed sheet of a media, make by resistant to elevated temperatures resistant material, can be separation sleeve corrosion resistance preferably is provided, therefore, this internal layer corrosion resistant, outer withstand voltage structure, make separation sleeve when having preferably heat-resisting ability, the ability of high strength and highly corrosion resistant can be combined, thereby overcome existing structure or lacked voltage endurance capability or the deficiency of shortage corrosion resistance; Adopt nonmetallic material to make each layer of separation sleeve, the problem that can avoid the metallic material eddy current loss to bring overall efficiency to reduce.
Internal layer directly contacts with fed sheet of a media, for separation sleeve provides corrosion resistance; Material category with decay resistance preferably is more, and as preferably, the material of described internal layer is PFA or PTFE or PVDF or FEP.Adopt these fluoroplastic materials, internal layer also is easy to make moulding when having good corrosion resistance, and cost is lower, is suitable for making in batches; The internal layer of these fluoroplastic material can also provide the better seal performance in addition, avoids inner fed sheet of a media to leak.Being mainly separation sleeve provides the skin of voltage endurance capability, though directly do not contact with fed sheet of a media, need have certain corrosion resistance equally; As preferably, described outer field material is a fiber glass epoxy.Fiber glass epoxy has voltage endurance capability preferably, also has resistance to high temperature preferably, also has certain decay resistance; Fiber glass epoxy is outer easily to be made, and cost is low.Be to improve the adhesive strength of internal layer and adjacent layer, as preferably, the processing of the junction plane of described internal layer and adjacent layer employing activating surface.For the internal layer of making such as nonmetallic material such as fluoroplastic, it adopts activating surface to handle, and making has good binding between internal layer and the adjacent layer, more can strengthen the anti-high pressure and the resistance to high temperature of separation sleeve.
Under the high pressure effect, the joint of bottom and tube portion easily ftractures because stress concentrates, and as preferably, the joint of described bottom and tube portion is set to arc.In like manner, as preferably, the root of described fixed connection apparatus and the joint of body are provided with fillet.This arc-shaped transition or fillet structure have been avoided the stress concentration phenomenon effectively, have further improved the anti-high pressure and the resistance to high temperature of separation sleeve.Tradition magnetic drive pump separation sleeve adopts flat-bottom structure more, under hot environment, and the influence of temperature distortion, pressure distortion, flat-bottom structure usually is difficult to bear higher working pressure; As preferably, the bottom of described body is at the bottom of arcuate bottom or conical bottom or the butterfly or at the bottom of the toric surface.At the bottom of arcuate bottom or conical bottom or the butterfly or at the bottom of the toric surface, have certain ductility, non-deformability is stronger; In addition, the bottom of these shapes also can avoid bottom and separation sleeve cylindrical shell connecting part stress to concentrate and ftracture, and has improved the non-deformability of connecting part.
Therefore, the utlity model has following beneficial effect:
1, the drive mechanism of bearing housing, make magnetic drive pump transmission at high temperature more steady, and can carry out bath lubrication and good heat radiation to the rolling bearing on the transmission shaft thus, and make transmission shaft be difficult for the location actual effect, can significantly improve the Maximum operating temperature and the working life of magnetic drive pump;
2, by improving the Location accuracy of transmission shaft under hot operation, can reduce the positioning accuracy request of impeller shaft sliding bearing, and the working life of further having improved magnetic drive pump thus.
Description of drawings
Accompanying drawing 1 is a kind of structural representation of a kind of High-temperature Magnetic Pump of the present invention;
Accompanying drawing 3 is the II place enlarged diagrams in the accompanying drawing 2;
Accompanying drawing 4 is a kind of structural representations of bearing shell;
Accompanying drawing 5 is another kind of structural representations of bearing shell;
Accompanying drawing 6 is a kind of structural representations of separation sleeve.
Embodiment
Below by embodiment, and in conjunction with the accompanying drawings, technological scheme of the present invention is described in further detail.
Embodiment: a kind of High-temperature Magnetic Pump of the utility model, as shown in Figure 1, the sliding bearing that it comprises the pump housing 1, impeller 2, impeller shaft 5, be made of bearing shell 4 and bearing support 3, the magnet coupler, separation sleeve 8 and the transmission shaft 11 that constitute by interior magnet coupler 6 and outer magnet coupler 7, interior magnet coupler 6, outer magnet coupler 7 are separately fixed at the end of impeller shaft 5, transmission shaft 11, be arranged with bearing housing 12 on the transmission shaft 11, transmission shaft 11 connects these bearing housing 12 middle parts, and is fixed on these bearing housing 12 two sides by rolling bearing 13; Bearing housing 12 which is provided with carriage 17, filler opening for the bottom can hold the enclosed construction of Lubricants, and filler opening is provided with oil gun 10.Be fixed on the rolling bearing 13 of bearing housing 12 two sides, spacing is about 0.5-1.5 times of outer magnet coupler 7 axial lengths.
Rolling bearing 13 outsides are provided with end cap 14 and the dust cover 15 that is sheathed on the transmission shaft 11, and this end cap 14 is provided with the seal ring that constitutes radial seal with transmission shaft 11 circumference.
The outer magnet coupler 7 outer protection cylinder 9 that are arranged with; This protection cylinder 9 is a non-metallic material, and the one end is fixed on bearing housing 12 sidewalls, the other end is resisted against on bearing support 3 sidewalls.
Shown in accompanying drawing 2, accompanying drawing 3, accompanying drawing 4, accompanying drawing 5, bearing shell 4 excircles are provided with 1-6 limit dais 41 that is used to prevent its rotation, and this limit dais 41 is platform or boss, is evenly distributed on bearing shell 4 excircles; Be provided with platform or the groove adaptive in the bearing shell mounting hole on the bearing support 3 with limit dais 41.The diameter of bearing shell 4 excircles is less than the diameter of the bearing shell mounting hole on the bearing support 3; Be provided with gap compensating ring 7 at bearing shell 4 and 3 of bearing supports, this gap compensating ring 7 is the elastomer of collapsible distortion, and outside is resisted against bearing shell 4 peripheries, bearing shell mounting hole inwall respectively in it.The diameter of bearing shell 4 excircles and bearing shell mounting hole poor, bearing shell 4 excircles and bearing shell mounting hole inner circumference radial heat distortion amount sum when being equivalent to maximum operation temperature.
As shown in Figure 6, separation sleeve 8 comprises the body that is made of bottom 84 and tube portion 85, and is located at the fixed connection apparatus 82 on the body, and bottom 84 sealing and fixing are in the bottom of tube portion 85; Body is two-layer or two-layer above structure, and it comprises skin 81 and the internal layer of being made by resistant material 83.The material of internal layer 83 is PFA or PTFE or PVDF or FEP; Described outer 81 material is a fiber glass epoxy; Internal layer 83 adopts activating surface to handle with the junction plane of adjacent layer.Bottom 84 is set to arc with the joint of tube portion 85; Bottom 84 is at the bottom of arcuate bottom or conical bottom or the butterfly or at the bottom of the toric surface.
Traditional suspension-type magnetic drive pump, publication as described in the background art is disclosed, and Maximum operating temperature is generally about 160 °; Magnetic drive pump of the present invention, heatproof can be up to 350 °.
When installing and using, bearing housing 12, the pump housing 1 are fixedly mounted on the use position by carriage 17 respectively; The free end of transmission shaft 11 and the motor shaft of external drive motors formation are in transmission connection; Externally under the driving of drive motor, transmission shaft 11 rotates in bearing housing 12, and outer magnet coupler 7 rotates thereupon; Under magnetic force, magnet coupler 6 revolutions in outer magnet coupler 7 drives, and impeller axle 5 turns round in sliding bearing are rotated impeller 2 on the impeller shaft 5 and are formed magnetic drive pump and enter working state.
Claims (10)
1. High-temperature Magnetic Pump, comprise the pump housing (1), impeller (2), impeller shaft (5), sliding bearing by bearing shell (4) and bearing support (3) formation, magnet coupler by interior magnet coupler (6) and outer magnet coupler (7) formation, separation sleeve (8) and transmission shaft (11), interior magnet coupler (6), outer magnet coupler (7) is separately fixed at impeller shaft (5), the end of transmission shaft (11), it is characterized in that: be arranged with bearing housing (12) on the described transmission shaft (11), transmission shaft (11) connects this bearing housing (12) middle part, and is fixed on this bearing housing (12) two side by rolling bearing (13); Described bearing housing (12) which is provided with carriage (17), filler opening for the bottom can hold the enclosed construction of Lubricants, and oil gun (10) is set on the filler opening.
2. a kind of High-temperature Magnetic Pump according to claim 1, it is characterized in that: described rolling bearing (13) outside is provided with end cap (14) and the dust cover (15) that is sheathed on the transmission shaft (11), and this end cap (14) is provided with the seal ring that constitutes radial seal with transmission shaft (11) circumference.
3. a kind of High-temperature Magnetic Pump according to claim 1 is characterized in that: the outer protection cylinder (9) that is arranged with of described outer magnet coupler (7); This protection cylinder (9) is a non-metallic material, and the one end is fixed on bearing housing (12) sidewall, the other end is resisted against on bearing support (3) sidewall.
4. a kind of High-temperature Magnetic Pump according to claim 1 is characterized in that: be fixed on the rolling bearing (13) of bearing housing (12) two side, spacing is about 0.5-1.5 times of outer magnet coupler (7) axial length.
5. according to claim 1 or 2 or 3 or 4 described a kind of High-temperature Magnetic Pumps, it is characterized in that: described bearing shell (4) excircle is provided with 1-6 limit dais (41) that is used to prevent its rotation, this limit dais (41) is platform or boss, is evenly distributed on bearing shell (4) excircle; Be provided with in the bearing shell mounting hole on the bearing support (3) and adaptive platform or the groove of limit dais (41).
6. a kind of High-temperature Magnetic Pump according to claim 5 is characterized in that: the diameter of described bearing shell (4) excircle is less than the diameter of the bearing shell mounting hole on the bearing support (3); Be provided with gap compensating ring (7) between bearing shell (4) and bearing support (3), this gap compensating ring (7) is the elastomer of collapsible distortion, and outside is resisted against bearing shell (4) periphery, bearing shell mounting hole inwall respectively in it.
7. a kind of High-temperature Magnetic Pump according to claim 6 is characterized in that: the diameter of described bearing shell (4) excircle and bearing shell mounting hole poor, (4) excircle of bearing shell when being equivalent to maximum operation temperature and bearing shell mounting hole inner circumference radial heat distortion amount sum.
8. according to claim 1 or 2 or 3 or 4 described a kind of High-temperature Magnetic Pumps, it is characterized in that: described separation sleeve (8) comprises the body that is made of bottom (84) and tube portion (85), and be located at fixed connection apparatus (82) on the body, described bottom (84) sealing and fixing is in the bottom of tube portion (85); Described body is two-layer or two-layer above structure, and it comprises skin (81) and the internal layer of being made by resistant material (83).
9. a kind of High-temperature Magnetic Pump according to claim 8 is characterized in that: the material of described internal layer (83) is PFA or PTFE or PVDF or FEP; The material of described skin (81) is a fiber glass epoxy; Described internal layer (83) adopts activating surface to handle with the junction plane of adjacent layer.
10. a kind of High-temperature Magnetic Pump according to claim 8 is characterized in that: described bottom (84) are set to arc with the joint of tube portion (85); Described bottom (84) is at the bottom of arcuate bottom or conical bottom or the butterfly or at the bottom of the toric surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205407079U CN201896760U (en) | 2010-09-25 | 2010-09-25 | High-temperature magnetic pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205407079U CN201896760U (en) | 2010-09-25 | 2010-09-25 | High-temperature magnetic pump |
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| Publication Number | Publication Date |
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| CN201896760U true CN201896760U (en) | 2011-07-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205407079U Expired - Fee Related CN201896760U (en) | 2010-09-25 | 2010-09-25 | High-temperature magnetic pump |
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| Country | Link |
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| CN (1) | CN201896760U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102384185A (en) * | 2011-10-08 | 2012-03-21 | 龙口市汽车风扇离合器厂 | Insert, manufacturing method of insert, electromagnetic clutch with insert and manufacturing method of electromagnetic clutch |
| CN103161749A (en) * | 2011-12-09 | 2013-06-19 | 黄晓鹏 | High-power plastic lining magnetic pump |
| CN108916067A (en) * | 2018-06-28 | 2018-11-30 | 陕西科技大学 | A kind of magnetic drive formula acid-proof pump |
| CN108953164A (en) * | 2018-06-28 | 2018-12-07 | 陕西科技大学 | A kind of contactless delivery pump |
| CN113586512A (en) * | 2015-09-30 | 2021-11-02 | 浙江三花汽车零部件有限公司 | Rotor assembly and electric drive pump |
-
2010
- 2010-09-25 CN CN2010205407079U patent/CN201896760U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102384185A (en) * | 2011-10-08 | 2012-03-21 | 龙口市汽车风扇离合器厂 | Insert, manufacturing method of insert, electromagnetic clutch with insert and manufacturing method of electromagnetic clutch |
| CN103161749A (en) * | 2011-12-09 | 2013-06-19 | 黄晓鹏 | High-power plastic lining magnetic pump |
| CN103161749B (en) * | 2011-12-09 | 2015-04-22 | 黄晓鹏 | High-power plastic lining magnetic pump |
| CN113586512A (en) * | 2015-09-30 | 2021-11-02 | 浙江三花汽车零部件有限公司 | Rotor assembly and electric drive pump |
| CN113586512B (en) * | 2015-09-30 | 2023-12-26 | 浙江三花汽车零部件有限公司 | Rotor assembly and electrically driven pump |
| CN108916067A (en) * | 2018-06-28 | 2018-11-30 | 陕西科技大学 | A kind of magnetic drive formula acid-proof pump |
| CN108953164A (en) * | 2018-06-28 | 2018-12-07 | 陕西科技大学 | A kind of contactless delivery pump |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110713 Termination date: 20180925 |