CN1139729C - Shielded pipeline pump - Google Patents
Shielded pipeline pump Download PDFInfo
- Publication number
- CN1139729C CN1139729C CNB001073702A CN00107370A CN1139729C CN 1139729 C CN1139729 C CN 1139729C CN B001073702 A CNB001073702 A CN B001073702A CN 00107370 A CN00107370 A CN 00107370A CN 1139729 C CN1139729 C CN 1139729C
- Authority
- CN
- China
- Prior art keywords
- pump
- motor
- pump cover
- pipeline
- impeller
- 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 - Fee Related
Links
- 238000007789 sealing Methods 0.000 claims abstract description 13
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 7
- 229910002804 graphite Inorganic materials 0.000 claims description 7
- 239000010439 graphite Substances 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- 238000012423 maintenance Methods 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000012530 fluid Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 230000002153 concerted effect Effects 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 210000001138 tear Anatomy 0.000 description 1
Landscapes
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The present invention relates to a designed shielded pipeline pump which comprises a shielded motor and a pipeline pump. The upper surface of a pump cover presents a step shape; a motor casing and the pump cover of the pipeline pump are both positioned by the external edge of a bearing bracket. The bearing bracket is fixed on the motor casing by screw bolts, and the pump cover is connected with the motor casing by screw bolts. The lower surface of the pump cover in the pipeline pump is provided with two sealing rings, wherein the end surface sealing ring on the internal side forms end surface gap seal with the corresponding region of a blade wheel, and the radial sealing ring on the external side forms radial gap seal with the corresponding region of the blade wheel. The present invention makes the shielded motor and the pipeline pump become mutually independent structures so as to improve the concentricity of a motor rotor and a motor stator and reduce the axial force of the pump.
Description
The present invention relates to a kind of shielded pipeline pump, belong to the hydraulic machinery technical field.
Shielded pipeline pump is mainly used in water system and hot-water heating system, and industrial conveying solids-laden fluid not.Owing to adopted motor and pump integrated structure, abandoned requirement to shaft sealing, thoroughly solved the difficult problem of conventional pump easy to leak, quick abrasion.Reliable because of it, easy to maintenance, compliance with environmental protection requirements, and favored by the user.
In the prior art, a kind of shielded pipeline pump is arranged, its structure mainly comprises shield electric machine and pipeline mounted pump two large divisions as shown in Figure 1.Motor mainly is made up of axle, rotor, stator, motor casing, shield plate and bearing.Bearing is at the two ends of axle, plays supporting axle.Rotor is fixed on axle and goes up and axle rotation together.Stator is fixed in the casing in the outside of rotor, and between stator and rotor, both all with the housing sealing, lead to cooling water between the housing.Pipeline mounted pump mainly is made up of impeller, the pump housing and pump cover in the bottom of motor.Impeller is fixed on axle bottom, is installed in the cavity of the pump housing and pump cover near the lower bearing of axle, and the pump housing has two openings, and pipeline links before import and the pump, pipeline connection behind outlet and the pump.The rotation of motor shaft impeller makes the liquid of the impeller of flowing through increase pressure under centrifugal action, to keep ducted flow of fluid.The shielded pipeline pump noise is low, nothing leakage, reliable, easy to maintenance, belongs to the environment protection type pump, is widely used in floor water system, hot-water heating system and central air-conditioning system.But also there is following problems in the structure of above-mentioned shielded pipeline pump shown in accompanying drawing one:
1. because motor casing 3, bearing bracket stand 6 and shield plate all are separately fixed on the pump cover 8, make motor itself can not break away from the independent moulding of the pump housing.Bring two problems thus: 1. for the pump of different model, even the power of required motor, revolution are all identical, motor also must be made with pump, is difficult to realize multiple pump and adapted with a kind of motor.Be unfavorable for production, assembling, maintenance and spare part deposit.2. because the clamping bolt 5 of 8 of motor casing 3 and pump covers in the motor outside, very easily causes overhauling mistiming and dismantles, make motor stator screened film bad seals.
2. because bearing bracket stand 6 is to link to each other with motor casing 3 by pump cover 8, easily make the concentricity increase of rotor 1 and stator 2, have to consider the air gap between the expanded motor iron core in the design, reduced electric efficiency like this.
3. former shielded pipeline pump only forms a cover radial clearance seals at back shroud of impeller and seal ring 7, makes graphite bearing 4 bear bigger following axial force vertically, so it weares and teares comparatively fast, is the subject matter that influences canned motorpump repair cycle and working life.
The objective of the invention is to design a kind of shielded pipeline pump, make shield electric machine and pipeline mounted pump become separate structure, motor and pump can be produced separately, again apolegamy assembling as required.Make the work such as design, type selecting, production, assembling, maintenance and spare part deposit of serial unit simpler, make things convenient for; Improve the concentricity of rotor and stator; Reduce the method for pump axial force, to prolong the service cycle and the machine life of pump.
The shielded pipeline pump of the present invention's design comprises shield electric machine and pipeline mounted pump, and shield electric machine is made up of parts such as rotor, stator, main shaft and motor casings, and described pipeline mounted pump comprises the pump cover impeller and the pump housing.The end of electric machine main shaft links by the pump cover of graphite bearing, bearing bracket stand and pipeline mounted pump, impeller is fixed on the underpart of main shaft, the upper surface that it is characterized in that described shielded pipeline pump pump cover is step-like, and the casing of shield electric machine and the pump cover of pipeline mounted pump are all located with the outer of bearing bracket stand; Bearing bracket stand is by being bolted on the motor casing, and pump cover connects with motor casing by bolt; The lower surface of pump cover has the two seals ring in the described pipeline mounted pump, and wherein the corresponding site of Nei Ce end face sealing ring and impeller forms the end clearance sealing, and the radial seal ring in the outside and the corresponding position of impeller form radial clearance seals.
The shielded pipeline pump of the present invention's design has the following advantages:
1. because shield electric machine and pipeline mounted pump are independent fully, can produce serial shield electric machine separately, select for use, only need the physical dimension of pump cover and motor casing lower end and bearing support, pump impeller and motor shaft to mate mutually and get final product for multiple model pump.All bring great convenience for like this design, type selecting, production, operation, maintenance, spare part deposit etc.In addition, because the structure of motor is independent, got rid of the possibility of motor stator screened film seals damaged when maintenance.
2. after the concentricity of motor stator and rotor improved, the gap reduced between the two, can improve electric efficiency, helps energy-conservation.
3. the double seal between pump cover and the back shroud of impeller has reduced axial force to the adjusting of hydraulic pressure, from having alleviated the wearing and tearing of graphite bearing.Can obviously prolong the repair cycle and the working life of whole pump, reduce the cost of use of canned motorpump.
Description of drawings
Fig. 1 is the prior art structural representation.
Fig. 2 is the shielded pipeline pump structural representation that the present invention designs.
Below in conjunction with accompanying drawing, describe content of the present invention in detail.
Among Fig. 1 and Fig. 2, the 1st, rotor, the 2nd, motor stator, the 3rd, motor casing, the 4th, graphite bearing, the 5th, bolt, the 6th, bearing bracket stand, the 7th, seal ring, the 8th, pump cover, the 9th, impeller, the 10th, the pump housing, the 11st, housing, the 12nd, main shaft, the 13rd, radial clearance seals, the 14th, end clearance sealing, the 15th, motor casing, the 16th, pump cover, the 17th, bearing bracket stand, the 18th, radial seal ring, the 19th, end face sealing ring, the 20th, bolt, the 21st, bolt, the 28th, pump inlet, the 29th, pump discharge, the 30th, bolt, the 31st, thrust plate, the 32nd, last shield plate, the 33rd, top cover.
As shown in Figure 2, the shielded pipeline pump of the present invention's design comprises shield electric machine and pipeline mounted pump.Shield electric machine is made up of rotor 1, stator 2, main shaft 12 and motor casing 15 etc.Described pipeline mounted pump comprises pump cover 16, impeller 9 and the pump housing 10.The end of electric machine main shaft links with the pump cover of pipeline mounted pump by graphite bearing 4, bearing bracket stand 17, and impeller is fixed on the underpart of main shaft.The upper surface of the pump cover 16 of shielded pipeline pump is step-like, and the motor casing 15 of shield electric machine is all located with the outer of bearing bracket stand 17 with the pump cover 16 of pipeline mounted pump; Bearing bracket stand is fixed on the motor casing by bolt 21, and pump cover connects with motor casing by bolt 20; The lower surface of pump cover has the two seals ring in the pipeline mounted pump, and wherein inboard end face sealing ring 19 forms end clearance sealing 14 with the corresponding site of impeller, and the radial seal ring 18 in the outside forms radial clearance seals 13 with the corresponding position of impeller.
Introduce working principle of the present invention below.
The assembling of shield electric machine:
1, the stator 2 that the assembles motor casing 15 of packing into, last shield plate is fixed by bolts on the motor casing at 3: 2;
2, rotor 1 and housing thereof are installed on the main shaft 12, and thrust plate 31 are enclosed within respectively on two shoulders of main shaft;
3, the bearing bracket stand 17 usefulness bolts 21 that will install graphite bearing 4 are fixed on the motor casing 15;
4, electric machine main shaft (together with rotor) is put into motor casing and is packed into bearing, then top cover 33 usefulness bolts is connected with motor casing.Finished the assembling of shield electric machine like this.
The general assembly of shielded pipeline pump:
1, pump cover 16 is connected with motor casing by bolt 20.As long as the corresponding position of shape, size and the motor casing of pump cover upper surface is complementary.All be to be that standard is located mutually between the two during assembling, make rotor 1, stator 2, the pump housing 10, impeller 9 centerings easily each other with bearing bracket stand 12 outers.Guarantee the concentric of stator can and Rotor can, and helped improving efficiency of motor.
2, impeller 9 is fixed on the lower end of main shaft, the pump housing 10 is connected with pump cover by bolt 30.Promptly finished the assembling of shielded pipeline pump.
The working procedure of shielded pipeline pump:
Shielded pipeline pump when work, the rotation of electric machine main shaft impeller, impeller by blade to the liquid work done in the pump housing.Current enter in the pump from water intake 28, and the water of the impeller of flowing through obtains energy under the blade effect, and the current after the supercharging flow out by water outlet 29.Radial clearance seals ring 18 on back shroud of impeller and the pump cover, end clearance seal ring 19 form respectively radially and the double clearance seal 13,14 of end face.Hydraulic pressure in the annular region between two resealings can be regulated automatically with the size in end face seal gap.Making a concerted effort of this pressure and rotatable parts gravity is opposite with water pressure direction on the front shroud of impeller.The end clearance that can adjust back shroud automatically in service is cancelled out each other the active force of both direction.In the ideal case, can form zero axial force, rotating part such as impeller is turned round under state of suspension.
Claims (1)
1, a kind of shielded pipeline pump, comprise shield electric machine and pipeline mounted pump, shield electric machine is made up of rotor, stator, main shaft and motor casing, described pipeline mounted pump comprises pump cover, impeller and the pump housing, the end of electric machine main shaft links by the pump cover of graphite bearing, bearing bracket stand and pipeline mounted pump, and impeller is fixed on the underpart of main shaft; The upper surface that it is characterized in that described pipeline mounted pump pump cover is step-like, and the casing of shield electric machine and the pump cover of pipeline mounted pump are all located with the outer of bearing bracket stand; Bearing bracket stand is by being bolted on the motor casing, and pump cover connects with motor casing by bolt; The lower surface of pump cover has the two seals ring in the described pipeline mounted pump, and wherein the corresponding site of Nei Ce end face sealing ring and impeller forms the end clearance sealing, and the radial seal ring in the outside and the corresponding position of impeller form radial clearance seals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB001073702A CN1139729C (en) | 2000-05-12 | 2000-05-12 | Shielded pipeline pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB001073702A CN1139729C (en) | 2000-05-12 | 2000-05-12 | Shielded pipeline pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1271060A CN1271060A (en) | 2000-10-25 |
| CN1139729C true CN1139729C (en) | 2004-02-25 |
Family
ID=4578653
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB001073702A Expired - Fee Related CN1139729C (en) | 2000-05-12 | 2000-05-12 | Shielded pipeline pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1139729C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101988511B (en) * | 2009-07-30 | 2013-09-11 | 上海新沪电机厂有限公司 | Pipeline shielding structural electric pump working in manner of internal circulation |
| CN102195387B (en) * | 2011-03-21 | 2012-10-31 | 梁嘉麟 | Sealing structure of submersible pump |
| CN104047868A (en) * | 2014-06-27 | 2014-09-17 | 厦门市益能泵业有限公司 | Mute fire fighting pressure stabilizing and boosting device |
| CN105697408B (en) * | 2016-04-13 | 2018-03-16 | 镇江福泰克流体技术有限公司 | A kind of sealing structure for centrifugal pump |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0060109A1 (en) * | 1981-03-09 | 1982-09-15 | Skf (U.K.) Limited | Shaft seals for rotary pumps |
| US4854598A (en) * | 1987-12-01 | 1989-08-08 | Goetze Ag | Slide ring seal with carrier body |
| US4973224A (en) * | 1988-06-24 | 1990-11-27 | Goetze Ag | Impeller-and-seal unit for liquid pumps |
| CN2102399U (en) * | 1991-10-07 | 1992-04-22 | 天津市电机总厂 | Seal and bearing lubrication device of supercharging centrifugal pump |
| CN2302360Y (en) * | 1997-03-30 | 1998-12-30 | 马国龙 | Magnetofluid sealing apparatus for centrifugal pump |
| CN1226641A (en) * | 1998-02-17 | 1999-08-25 | 鄢平安 | High speed centrifugal pump |
-
2000
- 2000-05-12 CN CNB001073702A patent/CN1139729C/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0060109A1 (en) * | 1981-03-09 | 1982-09-15 | Skf (U.K.) Limited | Shaft seals for rotary pumps |
| US4854598A (en) * | 1987-12-01 | 1989-08-08 | Goetze Ag | Slide ring seal with carrier body |
| US4973224A (en) * | 1988-06-24 | 1990-11-27 | Goetze Ag | Impeller-and-seal unit for liquid pumps |
| CN2102399U (en) * | 1991-10-07 | 1992-04-22 | 天津市电机总厂 | Seal and bearing lubrication device of supercharging centrifugal pump |
| CN2302360Y (en) * | 1997-03-30 | 1998-12-30 | 马国龙 | Magnetofluid sealing apparatus for centrifugal pump |
| CN1226641A (en) * | 1998-02-17 | 1999-08-25 | 鄢平安 | High speed centrifugal pump |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1271060A (en) | 2000-10-25 |
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| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| 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 |