CN202348765U - Multi-stage canned motor pump with back-to-back impellers - Google Patents
Multi-stage canned motor pump with back-to-back impellers Download PDFInfo
- Publication number
- CN202348765U CN202348765U CN2011205241970U CN201120524197U CN202348765U CN 202348765 U CN202348765 U CN 202348765U CN 2011205241970 U CN2011205241970 U CN 2011205241970U CN 201120524197 U CN201120524197 U CN 201120524197U CN 202348765 U CN202348765 U CN 202348765U
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- Prior art keywords
- impeller
- impellers
- group
- pump
- rotor shaft
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Abstract
The utility model relates to a multi-stage canned motor pump with back-to-back impellers. The multi-stage canned motor pump comprises a motor and a pump part and is characterized in that two groups of impellers respectively are one group of forward impellers and one group of reverse impellers; the group of forward impellers are located on a rotor shaft at one side of a pump inlet; the group of reverse impellers are located on a rotor shaft at one side connected with the motor; blades on the forward impellers are bent clockwise and the blades on the reverse impellers are bent anticlockwise; suction inlets of the forward impellers correspond to the pump inlet; and suction inlets of the reverse impellers correspond to the motor. According to the multi-stage canned motor pump with the back-to-back impellers, disclosed by the utility model, axial forces stressed on the group of forward impellers and the group of reverse impellers are approximately equal in strength and opposite in directions, so that the axial forces are reduced greatly. The pressure distribution on each stage of impellers behind the cut impeller is improved by means of a method of cutting external diameter of the immediate impeller, and the effect of balancing residual axial force can be achieved. With adoption of the structure form, the overall structure of the pump is more compact.
Description
Technical field
The utility model belongs to the shielded electric-pump technical field, is specifically related to a kind of multistage shielded electric-pump that the even level impeller is housed.
Background technique
Axial force is an important subject need tackling key problems in the shielded electric-pump field, and axially the force unbalance meeting causes serious consequences such as bearing wear aggravation, so that influences the proper functioning of pump.Pump is on-stream, is acting on axial force on the rotor, and this power will spur rotor axial and move.Therefore, must manage to eliminate or this axial force of balance, can make the pump proper functioning, the axial force that acts on the pump rotor, mainly form by following each component: 1, the axial force of the asymmetric generation of impeller front and rear cover plate, this power is pointed to the suction eye direction, representes with A1; 2, dynamical reaction, this power point to the impeller back, represent with A2; 3, the axial force that causes of structural factor such as pillow block, axle head, its direction is determined on a case-by-case basis, and representes with A3; 4, the axial force that causes of rotor weight is relevant with the arrangement of rotor, representes with A4; 5, influence the other factors of axial force.At present, common multistage shielded electric-pump impeller is arranged as sugar coated haws string form, and suction eye is towards the same side, and cover plate power causes axial force uneven more along same direction stack.The impeller of this kind structural type is provided with back envelope ring as the single-stage shielded electric-pump, and back shroud bores equalizing orifice near wheel hub, regulates axial force through the size that changes equalizing orifice.But, because this kind structural type rotor axial longer dimension, thereby axial force is difficult for adjustment.
Summary of the invention
In order to solve the rotor axial longer dimension of the multistage shielded electric-pump that the even level impeller is housed, thereby axial force is difficult for the problem of adjustment, and the utility model provides the multistage shielded electric-pump of a kind of impeller for arranging back-to-back.
The concrete technological scheme of the utility model technical solution problem is following:
Impeller comprises motor and pump part for the multistage shielded electric-pump of arranging back-to-back, and said pump partly comprises the pump housing, rotor shaft and two groups of impellers, and every group of impeller formed by the impeller more than two; The said pump housing comprises successively the entry section that connects, preceding urceolus, water exit end and back urceolus, and the entry section is positioned at the axial end of the pump housing, and water exit end is positioned at pump housing middle part one side; One end of said rotor shaft is connecting motor, the other end corresponding the entry section; On the rotor shaft of urceolus one side, another group impeller was positioned on the rotor shaft of back urceolus one side before one group of impeller was positioned at, and improvement is: said two groups of impellers are respectively one group of positive impeller and one group of anti-impeller; On the rotor shaft of urceolus one side, one group of anti-impeller was positioned on the rotor shaft of back urceolus one side before one group of positive impeller was positioned at; Blade on the said positive impeller is that clockwise direction is crooked, and the blade on the said anti-impeller is counterclockwise crooked; The suction port of positive impeller corresponding the entry section; The suction port of anti-impeller corresponding motor.
Said one group of positive impeller is made up of four positive impellers, and one group of anti-impeller is made up of four anti-impellers.
The utility model is primarily aimed at the cover plate power A1 in each component of above-mentioned axial force.The impeller front and rear cover plate is asymmetric, and front shroud does not have cover plate in the suction eye portion; On the other hand, the liquid in rotation of impeller front and rear cover plate in wheel disc is driving back cavity, the fluid pressure in cover plate side chamber rule parabolically distributes.Act on the pressure on the back shroud, except that choma offseted with top and the symmetrical pressure that acts on of front shroud, the choma bottom deducted suction pressure institute overbottom pressure power, and direction is pointed to impeller eye, and this power is cover plate power A1.
The utility model is through architecture advances, makes the axial force size approximately equal that acts on one group of positive impeller and the one group of anti-impeller, and is in the opposite direction, thereby can axial force be reduced greatly.Method through impeller outer diameter in the middle of cutting is improved the pressure distribution that is cut impeller subsequent stages impeller, can reach the effect of balance residual axial force.Adopt this structural type to make the pump general structure compact more.
Description of drawings
Fig. 1 is the utility model structural representation.
Fig. 2 is the partial enlarged drawing of Fig. 1 rotor axle and impeller.
Fig. 3 is positive blade wheel structure schematic representation.
Fig. 4 is anti-blade wheel structure schematic representation.
Sequence number among the last figure: entry section 1, positive impeller 2, water exit end 3, anti-impeller 4, motor 5, base 6, back urceolus 7, rotor shaft 9, preceding urceolus 10, positive impeller blade 2.1, anti-impeller blade 4.1.
Embodiment
Below in conjunction with accompanying drawing, the utility model is done explanation further through embodiment.
Embodiment:
Referring to Fig. 1, impeller comprises motor 5 and pump part for the multistage shielded electric-pump of arranging back-to-back.Pump partly comprises the pump housing, rotor shaft 9 and two groups of impellers, and every group of impeller is made up of four impellers; The pump housing comprises successively entry section 1, preceding urceolus 10, water exit end 3 and the back urceolus 7 that connects, and entry section 1 is positioned at the axial end of the pump housing, and water exit end 3 is positioned at pump housing middle part one side.One end of rotor shaft 9 is connecting motor 5, the other end corresponding entry section 1.Two groups of impellers are respectively one group of positive impeller 2 and one group of anti-impeller 4; Before one group of positive impeller 2 is positioned on the rotor shaft 9 of urceolus 10 1 sides, another is organized on the rotor shaft 9 that anti-impeller 4 is positioned at back urceolus 7 one sides, sees Fig. 2.Positive impeller blade 2.1 on the positive impeller 2 is that clockwise direction is crooked, and the anti-impeller blade 4.1 on the anti-impeller 4 is counterclockwise crooked, sees Fig. 4; The suction port of positive impeller 2 corresponding entry section 1; The suction port of anti-impeller 4 corresponding motor 5.
During work; Fed sheet of a media is got into by entry section 1; As shown in Figure 1; Arrow is represented the main flow path of fed sheet of a media in shielded electric-pump, and the medium that the positive impeller 2 of entry section 1 side is carried is incorporated in the back urceolus 7 of anti-impeller 4 excircles of rear side through the flowing hole of water exit end 3, is pooled to the outlet that anti-impeller 4 is sucked into water exit end 3 again.
Because fed sheet of a media acts on positive impeller 2 and the big or small approximately equal of the axial force on the anti-impeller 4, and is in the opposite direction, thereby this kind impeller arrangement can reduce axial force greatly.Method through impeller outer diameter in the middle of cutting is improved the pressure distribution that is cut impeller subsequent stages impeller, can reach the effect of balance residual axial force.Adopt this structural type to make the pump general structure compact more.
Claims (2)
1. impeller is the multistage shielded electric-pump of arranging back-to-back, comprises motor and pump part, and said pump partly comprises the pump housing, rotor shaft and two groups of impellers, and every group of impeller formed by the impeller more than two; The said pump housing comprises successively the entry section that connects, preceding urceolus, water exit end and back urceolus, and the entry section is positioned at the axial end of the pump housing, and water exit end is positioned at pump housing middle part one side; One end of said rotor shaft is connecting motor, the other end corresponding the entry section; On the rotor shaft of urceolus one side, another group impeller was positioned on the rotor shaft of back urceolus one side before one group of impeller was positioned at, and it is characterized in that: said two groups of impellers are respectively one group of positive impeller and one group of anti-impeller; On the rotor shaft of urceolus one side, one group of anti-impeller was positioned on the rotor shaft of back urceolus one side before one group of positive impeller was positioned at; Blade on the said positive impeller is that clockwise direction is crooked, and the blade on the said anti-impeller is counterclockwise crooked; The suction port of positive impeller corresponding the entry section; The suction port of anti-impeller corresponding motor.
2. impeller according to claim 1 is the multistage shielded electric-pump of arranging back-to-back, and it is characterized in that: said one group of positive impeller is made up of four positive impellers, and one group of anti-impeller is made up of four anti-impellers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205241970U CN202348765U (en) | 2011-12-15 | 2011-12-15 | Multi-stage canned motor pump with back-to-back impellers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205241970U CN202348765U (en) | 2011-12-15 | 2011-12-15 | Multi-stage canned motor pump with back-to-back impellers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202348765U true CN202348765U (en) | 2012-07-25 |
Family
ID=46537773
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205241970U Expired - Lifetime CN202348765U (en) | 2011-12-15 | 2011-12-15 | Multi-stage canned motor pump with back-to-back impellers |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202348765U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102425566A (en) * | 2011-12-15 | 2012-04-25 | 合肥新沪屏蔽泵股份有限公司 | Multi-stage shielded electric pump with back-to-back impeller arrangement |
-
2011
- 2011-12-15 CN CN2011205241970U patent/CN202348765U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102425566A (en) * | 2011-12-15 | 2012-04-25 | 合肥新沪屏蔽泵股份有限公司 | Multi-stage shielded electric pump with back-to-back impeller arrangement |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20130228 Address after: 230088 Anhui city of Hefei province high tech Zone Technology Park Bai Yan Yang Road No. 1 Patentee after: Hefei Xinhu Canned Motor Pump Co., Ltd. Address before: 230088 Anhui city of Hefei province high tech Zone Technology Park Bai Yan Yang Road No. 1 Patentee before: Hefei Xinhu Canned Motor Pump Co., Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120725 |