CN101566158B - High performance mechanical canned motor pump - Google Patents
High performance mechanical canned motor pump Download PDFInfo
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- CN101566158B CN101566158B CN2009100111018A CN200910011101A CN101566158B CN 101566158 B CN101566158 B CN 101566158B CN 2009100111018 A CN2009100111018 A CN 2009100111018A CN 200910011101 A CN200910011101 A CN 200910011101A CN 101566158 B CN101566158 B CN 101566158B
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Abstract
The invention provides a high performance mechanical canned motor pump, which comprises a pump body (1), a pump cover (2), an impeller (13), a pump shaft (4), and a bearing box (5), and is characterized in that: a mechanical sealing device (7) is arranged between the front end of the bearing box (5) and an impeller hub or the pump shaft; a mechanical sealing device (8) is arranged between the rearend of the bearing box (5) and the pump shaft (4); a front end plate (50) of the bearing box (5) is provided with a pressure equalizer (20) to make the pressure of an inner cavity (B) of the bearingbox and the inner cavity (A) of the pump cover (2) balanced; and screw pumping rings (3 and 6) and circumfluence holes (53 and 56) are arranged corresponding to the front and back mechanical sealing devices to fully cool and radiate the mechanical sealing devices and a rolling bearing. The high performance mechanical canned motor pump has the advantages of good leakproofness, long service life, safe and reliable use, good functionality and strong adaptive capacity, can be applicable to various working pressures, and fully meets the use requirement on places under working conditions such as high-pressure, toxic, flammable and explosive medium and the like.
Description
Technical field
What the present invention relates to is liquid delivery pump, as gear pump, and cam pump, centrifugal pump, particularly centrifugal pump.
Background technique
Gear pump; cam pump; centrifugal pump is mainly by the pump housing; pump cover; pump impeller; pump shaft; bearing housing constitutes; bearing housing is fixedlyed connected with pump cover by the suspension of its front end; in order to prevent that medium from leaking from pump shaft; between pump shaft and pump cover, be provided with seal arrangement; particularly adopt mechanical seal device; because relative pressure is bigger in the pump chamber; or when requiring sealing effect very high; requirement to mechanical seal device is also very high; as adopt the single mechanical end face seal device; to form a large amount of dielectric leakages in case lose efficacy, though as adopting double end-face mechanical sealing device to improve the reliability of sealing, double end-face mechanical sealing device must be furnished with complicated auxiliary protection system support and use; particularly solve heat dissipation problem; fitting operation, safeguard all very inconvenient, and cost height.In addition, even adopted mechanical seal device still to have a spot of medium can constantly leak into the pump cover opposite side, promptly leak into outside the pump, cause environmental pollution, the leakage environmental pollution of particularly poisonous, inflammable, explosive medium and the influence of safety in production are very big.
Summary of the invention
The purpose of this invention is to provide a kind of good airproof performance, functional good, high pressure resistant, long service life, safe and reliable high performance mechanical canned motor pump.
The present invention includes the pump housing, pump cover, pump impeller, pump shaft, bearing housing, pump shaft is by the installation that is rotatably assorted of rolling bearing system and bearing housing front end and back end, in pump cover inner chamber A, promptly between the front end-plate of bearing housing and pump impeller wheel hub or and pump shaft between be provided with mechanical seal device-----front end robot seal arrangement, between bearing housing end plate and pump shaft, be provided with another mechanical seal device----rear robot seal arrangement, form airtight bearing housing inner chamber B, offer the pressure balance through hole and connection is provided with pressurizer on bearing housing front end-plate face, pressurizer is made of the piston cylinder structure; In bearing housing inner chamber B, promptly between bearing housing front end-plate and pump shaft, be provided with the spiral pump ring, on the bearing housing front end-plate, offer the return port that communicates with front end robot seal arrangement installation cavity C, the spiral pump ring is fixedly mounted on the pump shaft, sleeve inner ring surface on offering spiral chute on the outer ring surface of spiral pump ring and being fixedly mounted on the bearing housing front end-plate cooperates the formation volute pump, the cooling medium of front end robot seal arrangement installation cavity C and bearing housing inner chamber B is carried out pumping circulation, the heat that the rolling bearing of front end robot seal arrangement friction ring and front end the is produced cooling of dispelling the heat; Between bearing housing end plate and pump shaft, be provided with another spiral pump ring, on the bearing housing end plate, offer the backflow/throttle orifice that communicates with rear robot seal arrangement installation cavity D, the spiral pump ring is fixedly mounted on the pump shaft, sleeve inner ring surface on offering spiral chute on the outer ring surface of spiral pump ring and being fixedly mounted on the bearing housing end plate cooperates formation volute pump/reversing pump square auger pump, the cooling medium of rear robot seal arrangement installation cavity D and bearing housing inner chamber B is carried out pumping circulation, the heat that the rolling bearing of rear robot seal arrangement friction ring and rear end the is produced cooling of dispelling the heat; And when this pump inlet pressure is higher, when promptly doing two stage pump, because the pressure in the bearing housing inner chamber B is higher, the spiral pump ring of this rear end can form anti-pushing force pumping, under the cooperation of backflow/throttle orifice, control reduces the pressure in rear robot seal arrangement installation cavity (the being rear robot seal arrangement gland inner chamber) D, make rear robot seal arrangement installation cavity D keep the lower pressure of relative bearing housing inner chamber B, reduce rear robot seal arrangement working pressure, improve working environment, the pressure difference of rear robot seal arrangement massage seal face front end and back end is reduced greatly, effectively control and prevent rear robot seal arrangement generation seepage, and reduce requirement greatly to the rear robot seal arrangement, fully improve the sealability of pump.
The present invention is rational in infrastructure, the front end robot seal arrangement cuts off pump cover inner chamber A and bearing housing inner chamber B, before, the rear robot seal arrangement makes bearing housing inner chamber B form Seal cage, in bearing housing inner chamber B, inject cutting oil, on bearing housing front end-plate face, offer through hole and connection is provided with pressurizer, can make pump cover inner chamber A and the bearing housing inner chamber B balance that keep-ups pressure, when the pressure of pump cover inner chamber A is big, pass through in the bearing housing inner chamber B that pressurizer-----piston cylinder is delivered to opposite side, be that the piston that the pressure of pump cover inner chamber A promotes pressurizer when big moves to opposite side, make propagation of pressure in the bearing housing inner chamber B of opposite side, make pump cover inner chamber A keep equating with the pressure of bearing housing inner chamber B, make the pressure of front end robot seal arrangement massage seal face front end and back end equate, almost there is not pressure reduction, so there is not leakage, therefore can adopt simple, the mechanical seal device that cost is low, and can guarantee sealing and working life, medium in the pump chamber can not leak among the bearing housing inner chamber B, can be to the cutting oil composite pollution among the bearing housing inner chamber B; The heat that the spiral pump ring produces front end and back end mechanical seal device friction ring and the rolling bearing cooling of dispelling the heat provides guarantee to using rolling bearing, and uses rolling bearing can improve the axial carrying capacity of pump shaft, the working life of raising pump; When this pump inlet pressure is higher, rear end spiral pump ring can be realized reverse pumping, make rear robot seal arrangement chamber D keep the lower pressure of relative bearing housing inner chamber B, the friction sealed end face of rear robot seal arrangement front end and back end is kept than small pressure difference, improve the working environment of mechanical seal device, adopt the mechanical seal device simple, that cost is low, increase the service life, and improved sealing.
Good airproof performance of the present invention, long service life, safe and reliable, functional good, adaptive capacity is strong, uses applicable to low, high pressure operating mode, fully satisfies operating mode occasions such as high pressure, poisonous, inflammable, explosive medium and uses.
Description of drawings
Fig. 1 is an embodiment of the invention structural representation.
Fig. 2 is front end robot seal arrangement and the spiral pump ring structure signal enlarged view among Fig. 1.
Fig. 3 is rear robot seal arrangement and the spiral pump ring structure signal enlarged view among Fig. 1.
Embodiment
Be centrifugal pump shown in the accompanying drawing embodiment.The present invention includes the pump housing 1, impeller 13, pump cover 2, pump shaft 4, bearing housing 5, bearing housing 5 is by front end-plate 50, cylindrical shell 58, end plate 55 constitutes, pump shaft 4 is by rolling bearing 61,62 with the installation that is rotatably assorted of bearing housing 5 front and back end plates, in pump cover 2 inner chamber A, promptly between the front end-plate 50 of bearing housing and pump impeller wheel hub or 4 of pump shafts be provided with mechanical seal device-----front end robot seal arrangement 7, be provided with another mechanical seal device----rear robot seal arrangement 8 at bearing housing end plate 55 and 4 of pump shafts, before, rear robot seal arrangement 7,8 make bearing housing 5 inner chamber B form airtight inner chamber, in bearing housing inner chamber B, inject cutting oil, on bearing housing front end-plate 50 plate faces, offer pressure balance through hole 52 and connection and be provided with pressurizer 20, make bearing housing inner chamber B and pump cover 2 inner chamber A pressure balances, pressurizer is made of the piston cylinder structure; Be provided with spiral pump ring 3 at bearing housing 5 inner chamber B middle (center) bearing case front end-plates 50 and 4 of pump shafts, on bearing housing front end-plate 50, offer the return port 53 that communicates with front end robot seal arrangement installation cavity C, spiral pump ring 3 is fixedly mounted on the pump shaft 4, sleeve 51 inner ring surfaces on offering spiral chute 31 on the outer ring surface of spiral pump ring 3 and being fixedly mounted on bearing housing front end-plate 50 cooperate and form volute pump, and the cooling medium of front end robot seal arrangement installation cavity C and bearing housing inner chamber B is carried out pumping circulation; Be provided with another spiral pump ring 6 at bearing housing end plate 55 and 4 of pump shafts, on bearing housing end plate 55, offer the backflow/throttle orifice 56 that communicates with rear robot seal arrangement installation cavity D, spiral pump ring 6 is fixedly mounted on the pump shaft 4, sleeve 54 inner ring surfaces on offering spiral chute 60 on the outer ring surface of spiral pump ring 6 and being fixedly mounted on bearing housing end plate 55 cooperate formation volute pump/reversing pump square auger pump, the cooling medium of rear robot seal arrangement installation cavity D and bearing housing inner chamber B is carried out pumping circulation, and realize that control reduces the pressure in the rear robot seal arrangement installation cavity D.
The mechanical seal device 7,8 of front and back ends of the present invention is the single mechanical end face seal device, or double end-face mechanical sealing device; Be the bellows type mechanical seal device, or spring type mechanical sealing device.
Mutual bolt seal is fixedly connected constitutes by front end-plate 50, cylindrical shell 58, end plate 55 for bearing housing 5 of the present invention, offers cutting oil into and out of the mouth of pipe on cylindrical shell 58; On the cylindrical shell 58 of bearing housing 5, be provided with coolant jacket 59, form cooling chamber E, on cylindrical shell 58, offer cooling chamber E cooling liquid into and out of the mouth of pipe.
The present invention is provided with deflection plate 81 on the gland 80 of rear robot seal arrangement 8, to strengthen rear robot seal arrangement installation cavity D medium flow process, improve radiating effect.
The present invention is provided with sealing cover 9 in bearing housing end plate 55 outsides, and sealing cover 9 is connected by the sealing gasket bolt with bearing housing end plate 55, and the axis hole of sealing cover 9 is provided with seal ring 91 and seals with pump shaft 4, further improves sealing.
This bright returning can be gear pump, cam pump.
Claims (4)
1. mechanical masking pump, include the pump housing (1), impeller (13), pump cover (2), pump shaft (4), bearing housing (5), it is characterized in that bearing housing (5) is by front end-plate (50), cylindrical shell (58), end plate (55) constitutes, pump shaft (4) is by rolling bearing (61,62) with bearing housing (5) before and after the end plate installation that is rotatably assorted, between the front end-plate (50) of bearing housing and pump shaft (4), be provided with front end robot seal arrangement (7), between bearing housing end plate (55) and pump shaft (4), be provided with rear robot seal arrangement (8), before, rear robot seal arrangement (7,8) make bearing housing (5) inner chamber (B) form airtight inner chamber, on bearing housing front end-plate (50) plate face, offer pressure balance through hole (52) and connection is provided with pressurizer (20), make bearing housing inner chamber (B) and pump cover (2) inner chamber (A) pressure balance, between bearing housing inner chamber middle (center) bearing case front end-plate (50) and pump shaft (4), be provided with spiral pump ring (3), on bearing housing front end-plate (50), offer the return port (53) that communicates with front end robot seal arrangement installation cavity (C), spiral pump ring (3) is fixedly mounted on the pump shaft (4), offer spiral chute (31) on the outer ring surface of spiral pump ring (3) thus cooperate and form volute pump with sleeve (51) inner ring surface on being fixedly mounted on bearing housing front end-plate (50), the cooling medium of front end robot seal arrangement installation cavity (C) and bearing housing inner chamber (B) is carried out pumping circulation, between bearing housing end plate (55) and pump shaft (4), be provided with another spiral pump ring (6), on bearing housing end plate (55), offer the backflow/throttle orifice (56) that communicates with rear robot seal arrangement installation cavity (D), another spiral pump ring (6) is fixedly mounted on the pump shaft (4), offer spiral chute (60) on the outer ring surface of another spiral pump ring (6) thus cooperate and form volute pump/reversing pump square auger pump with sleeve (54) inner ring surface on being fixedly mounted on bearing housing end plate (55), the cooling medium of rear robot seal arrangement installation cavity (D) and bearing housing inner chamber (B) is carried out pumping circulation, and realize that control reduces the pressure in the rear robot seal arrangement installation cavity (D).
2. mechanical masking pump according to claim 1 is characterized in that, bearing housing (5) offers cutting oil into and out of the mouth of pipe by front end-plate (50), cylindrical shell (58), the mutual fixedly connected formation of bolt seal of end plate (55) on cylindrical shell (58); On the cylindrical shell (58) of bearing housing (5), be provided with coolant jacket (59), form cooling chamber (E), on cylindrical shell (58), offer cooling chamber (E) cooling liquid into and out of the mouth of pipe.
3. mechanical masking pump according to claim 1 and 2 is characterized in that, front and back ends mechanical seal device (7,8), it is the single mechanical end face seal device, or double end-face mechanical sealing device, be the bellows type mechanical seal device, or spring type mechanical sealing device.
4. mechanical masking pump according to claim 1 and 2, it is characterized in that, be provided with sealing cover (9) in bearing housing end plate (55) outside, sealing cover (9) is connected by the sealing gasket bolt with bearing housing end plate (55), and the axis hole of sealing cover (9) is provided with seal ring (91) and seals with pump shaft (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100111018A CN101566158B (en) | 2009-04-07 | 2009-04-07 | High performance mechanical canned motor pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100111018A CN101566158B (en) | 2009-04-07 | 2009-04-07 | High performance mechanical canned motor pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101566158A CN101566158A (en) | 2009-10-28 |
| CN101566158B true CN101566158B (en) | 2011-02-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009100111018A Active CN101566158B (en) | 2009-04-07 | 2009-04-07 | High performance mechanical canned motor pump |
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| CN (1) | CN101566158B (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103133395A (en) * | 2011-11-22 | 2013-06-05 | 上海连成（集团）有限公司 | Novel self-lubricating self-sealing bearing Y-type oil pump |
| CN102611237A (en) * | 2012-03-28 | 2012-07-25 | 大连华阳光大密封有限公司 | Vertical marine electric machine protecting and sealing device |
| CN103206413B (en) * | 2013-04-12 | 2015-09-16 | 上海阿波罗机械股份有限公司 | A kind of mechanical seal for main feed pump |
| CN104122069B (en) * | 2014-07-15 | 2017-06-13 | 上海交通大学 | A kind of asymmetric hydrodynamics axial force high-speed adjustment device of flywheel interstitial fluid |
| CN106949069B (en) * | 2017-05-15 | 2017-11-10 | 华中科技大学 | A kind of cutting bearing hydrodynamic floating mechanical pump |
| CN108457894A (en) * | 2017-06-02 | 2018-08-28 | 沈阳耐蚀合金泵股份有限公司 | Efficient non-leakage canned motor pump |
| CN107559167A (en) * | 2017-09-01 | 2018-01-09 | 江苏江大泵业制造有限公司 | From flowing forced air cooling high-temperature pump |
| CN110206734B (en) * | 2018-02-28 | 2021-04-30 | 中国石油天然气股份有限公司 | Centrifugal pump shaft and conveying equipment |
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2009
- 2009-04-07 CN CN2009100111018A patent/CN101566158B/en active Active
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| CN101566158A (en) | 2009-10-28 |
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