CN202125430U - Condensate water pump - Google Patents
Condensate water pump Download PDFInfo
- Publication number
- CN202125430U CN202125430U CN2011202218243U CN201120221824U CN202125430U CN 202125430 U CN202125430 U CN 202125430U CN 2011202218243 U CN2011202218243 U CN 2011202218243U CN 201120221824 U CN201120221824 U CN 201120221824U CN 202125430 U CN202125430 U CN 202125430U
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- China
- Prior art keywords
- pump
- impeller
- barrel body
- shaft
- pump barrel
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- Expired - Fee Related
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Abstract
The utility model discloses a condensate water pump, and relates to a water pump, more specifically to the improvement of a condensate water pump structure suitable for 350MW unit. A condensate water pump which has a short pump barrel body and is convenient to transport, install, overhaul and run is provided. The condensate water pump comprises a pump barrel body with a vapor removing pipe; an installing base is disposed outside the pump barrel body and a pump shaft is disposed inside the pump barrel body; a balance drum is disposed between the upper end of the pump barrel body and the pump shaft; the pump shaft is provided with a sealing case body corresponding to the balance drum; a discharge seat is disposed out of the upper part of the pump barrel body; the pump shaft positioned on the upper cover of the discharge seat is provided with a thrust bearing, and is provided with a primary impeller, a primary spiral housing, a secondary impeller and a last impeller arranged in turn from bottom up. The condensate water pump is structurally characterized in that: the primary impeller is set as a double suction structure; the primary spiral housing is provided with two spiral water pressing chambers symmetrically arranged; the secondary impeller and the last impeller are both set as single suction structures; and radial guide blades are disposed on the outer parts of the secondary impeller and the last impeller.
Description
Technical field
The utility model relates to a kind of condensate pump, in particular, relates to the improvement of the condensate pump structure that a kind of 350MW of being applicable to unit uses.
Background technique
The purposes of condensate pump is under the high vacuum condition, the water of condensation in the condenser hotwell to be delivered to low-pressure heater; Because water of condensation is in the saturation temperature under this vacuum condition; For device net positive suction head that improves system and the necessary NPSH that reduces pump itself; The condensate pump of conventional construction is generally taked following measure: 1, first stage impeller is a single suction formula impeller; Through prolonging the size of pump shaft, be positioned at underground pump barrel body to the first stage impeller design and installation, so that improve the device net positive suction head.In order to guarantee and the size coupling of pump shaft that the pumping chamber of secondary impeller adopts the spatial guide blade structure usually.
2, inducer is set before first stage impeller, so that improve the anti-cavitation performance of pump.
Above-mentioned two kinds of schemes will cause the size of pump barrel body long partially, and operation stability is poor, and required pump hole size is long, not only wastes the civil engineering cost, and is unfavorable for transportation, installation, maintenance and the operation of pump.
Summary of the invention
The utility model is exactly to the problems referred to above, provides a kind of pump barrel body size short, transports, installs, overhauls and move condensate pump easily.
For reaching the above-mentioned purpose of the utility model; The utility model adopts following technological scheme; The utility model comprises having the pump barrel body that takes off steam pipe, and pump barrel is external for the basis is installed, and is pump shaft in the pump barrel body; The upper end of pump barrel body is provided with sealed letter body corresponding to balancing drum with being provided with balancing drum between the pump shaft on the pump shaft; The pump barrel body is the seat that spues outside the top; Be positioned at a pump shaft at loam cake place that spues and be provided with thrust-bearing; Be disposed with first stage impeller, chopped-off head spiral-shell on the pump shaft from the bottom to top, secondary impeller and impeller, its structure outline: first stage impeller is set to the double-sucking type structure; The chopped-off head spiral-shell is provided with two screw type pumping chambers, two pumping chamber symmetric arrangement; Secondary impeller and impeller all are set to single suction formula structure; The outer installment radial stator of secondary impeller and impeller.
The beneficial effect of the utility model: 1, pump barrel body size is short, and transportation, installation, maintenance and operation are convenient: the utility model first stage impeller adopts the double-sucking type structure, need not inducer, and liquid is the suction port entering from both sides.Cavitation specific speed n
sBe merely 0.7 times of traditional single suction formula impeller, guaranteed the radially net positive suction head of stator of pumping chamber; The chopped-off head spiral-shell is provided with two screw type pumping chambers, and two pumping chamber symmetric arrangement can the autobalance radial force.And little, the compact structure of axial dimension of stator, secondary impeller and impeller radially; Make the entire length of the utility model shorten to 56% (the pump barrel body total length 4175mm of existing condensate pump, the pump barrel body total length 2350mm of the utility model) that has condensate pump now.Reduce the degree of depth that the basis is installed greatly, help transportation, installation, maintenance and operation.
2, good stability: the pump shaft total length of the utility model is 3226mm; Adopt single pump shaft, compare, reduced the cumulative error of two transmission shaft concentricitys with existing two transmission shafts that link to each other through case butt coupling; Be easy to machining, good operation stability.
Description of drawings
Fig. 1 is the structural representation of the utility model.
Fig. 2 is the structural representation that the utility model links to each other with variable-frequency motor.
Fig. 3 is the I portion enlarged view of Fig. 1.
In the accompanying drawing 1 for the pump barrel body, 2 for first stage impeller, 3 for the chopped-off head spiral-shell, 4 for secondary impeller, 5 for pump shaft, 6 for take off steam pipe, 7 for install the basis, 8 for impeller, 9 for balancing drum, 10 for the sealed letter body, 11 for the seat that spues, 12 for mechanical sealing mechanism, 13 for thrust-bearing, 14 be that elastic dowel pin shaft coupling, 15 is a variable-frequency motor.
Embodiment
The utility model comprises having the pump barrel body 1 that takes off steam pipe 6, for basis 7 is installed, is pump shaft 5 in the pump barrel body 1 outside the pump barrel body 1, and the upper end of pump barrel body 1 is provided with sealed letter body 10 corresponding to balancing drum 9 with being provided with balancing drum 9 between the pump shaft 5 on the pump shaft 5; Be the seat 11 that spues outside pump barrel body 1 top; The pump shaft 5 that is positioned at the seat 11 loam cake places that spue is provided with thrust-bearing 13; Be disposed with first stage impeller 2, chopped-off head spiral-shell 3 on the pump shaft 5 from the bottom to top, secondary impeller 4 and impeller 8, it is characterized in that: first stage impeller 2 is set to the double-sucking type structure; Chopped-off head spiral-shell 3 is provided with two screw type pumping chambers, two pumping chamber symmetric arrangement; Secondary impeller 4 all is set to single suction formula structure with impeller 8; The outer installment radial stator of secondary impeller 4 and impeller 8.
The seat 11 that spues is stretched out in the upper end of described pump shaft 5, and links to each other through the output shaft of elastic dowel pin shaft coupling 14 with variable-frequency motor 15.Adopt elastic dowel pin shaft coupling 14 can reduce the required precision that is connected of pump shaft 5 and motor output shaft, the simplification unit be installed on maintenance.
Adopt variable-frequency motor 15, when the used condensing capacity of generator set descends, realize adjustings of exerting oneself of condensate pump through the rotating speed that reduces variable-frequency motor 15, the assurance condensate pump operates in high efficiency scope district all the time.Compare with traditional mode that turns down the outlet gate valve, but use per hour saving power 90.9kWh of variable-frequency motor 15.
Described thrust-bearing 13 is set to the angular contact ball bearing of selflubricating; Be provided with the coil pipe type water-cooling tube in the lower cover of angular contact ball bearing.Angular contact ball bearing can bear the thrust load of upper and lower both direction, realizes that the axial force of condensate pump is born by the condensate pump body fully, and can effectively prevent in " apical axis " phenomenon that starts moment.
The pump shaft 5 of sealed letter body 10 tops is provided with mechanical sealing mechanism 12.It is 200920013013.7 that described mechanical sealing mechanism 12 adopts the patent No., and title is the seal arrangement described in " seal arrangement of vertical condensation water pump ".
The described steam pipe 6 that takes off is arranged at the below that pump barrel body 1 is installed basis 7; To take off steam pipe 6 and be arranged in basic 7 bottoms are installed, and can avoid when the maintenance lifting, need dismantling and take off steam pipe 6 companion flanges, and realize suction connection, take off vapour and take over and exempt from dismounting all the life.
The utility model has not only reduced installation volume after being applied on the 350MW grade thermal power generation unit greatly, and is easy to transportation, installs, overhauls and moves, and has also practiced thrift the energy.
Claims (5)
1. condensate pump; Comprise and have the pump barrel body (1) that takes off steam pipe (6); Pump barrel body (1) is outer for basis (7) is installed; In the pump barrel body (1) is pump shaft (5), is provided with balancing drum (9) between the same pump shaft in upper end (5) of pump barrel body (1), and pump shaft (5) is gone up and is provided with sealed letter body (10) corresponding to balancing drum (9); Be the seat (11) that spues outside pump barrel body (1) top; The pump shaft (5) that is positioned at seat (11) the loam cake place that spues is provided with thrust-bearing (13); Be disposed with first stage impeller (2), chopped-off head spiral-shell (3) on the pump shaft (5) from the bottom to top; Secondary impeller (4) and impeller (8) is characterized in that: first stage impeller (2) is set to the double-sucking type structure; Chopped-off head spiral-shell (3) is provided with two screw type pumping chambers, two pumping chamber symmetric arrangement; Secondary impeller (4) and impeller (8) all are set to single suction formula structure; The outer installment radial stator of secondary impeller (4) and impeller (8).
2. a kind of condensate pump according to claim 1 is characterized in that: the seat (11) that spues is stretched out in the upper end of described pump shaft (5), and links to each other through the output shaft of the same variable-frequency motor of elastic dowel pin shaft coupling (14) (15).
3. a kind of condensate pump according to claim 1 is characterized in that: described thrust-bearing (13) is set to the angular contact ball bearing of selflubricating; Be provided with the coil pipe type water-cooling tube in the lower cover of angular contact ball bearing.
4. a kind of condensate pump according to claim 1 is characterized in that: the pump shaft (5) of sealed letter body (10) top is provided with mechanical sealing mechanism (12).
5. a kind of condensate pump according to claim 1 is characterized in that: the described steam pipe (6) that takes off is arranged at the below that pump barrel body (1) is installed basis (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202218243U CN202125430U (en) | 2011-06-28 | 2011-06-28 | Condensate water pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202218243U CN202125430U (en) | 2011-06-28 | 2011-06-28 | Condensate water pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202125430U true CN202125430U (en) | 2012-01-25 |
Family
ID=45488498
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202218243U Expired - Fee Related CN202125430U (en) | 2011-06-28 | 2011-06-28 | Condensate water pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202125430U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104500415A (en) * | 2014-12-15 | 2015-04-08 | 哈尔滨电气动力装备有限公司 | Universal cavitation performance trial run equipment structure |
| CN109915414A (en) * | 2019-03-19 | 2019-06-21 | 江苏飞跃机泵集团有限公司 | A kind of effluent seat of pump for liquid salts |
-
2011
- 2011-06-28 CN CN2011202218243U patent/CN202125430U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104500415A (en) * | 2014-12-15 | 2015-04-08 | 哈尔滨电气动力装备有限公司 | Universal cavitation performance trial run equipment structure |
| CN104500415B (en) * | 2014-12-15 | 2016-10-26 | 哈尔滨电气动力装备有限公司 | General cavitation performance test run device structure |
| CN109915414A (en) * | 2019-03-19 | 2019-06-21 | 江苏飞跃机泵集团有限公司 | A kind of effluent seat of pump for liquid salts |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120125 Termination date: 20150628 |
|
| EXPY | Termination of patent right or utility model |