CN207406541U - Vane apparatus between the steady formula grade of water conservancy diversion of boiler feed pump - Google Patents
Vane apparatus between the steady formula grade of water conservancy diversion of boiler feed pump Download PDFInfo
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- CN207406541U CN207406541U CN201720935934.3U CN201720935934U CN207406541U CN 207406541 U CN207406541 U CN 207406541U CN 201720935934 U CN201720935934 U CN 201720935934U CN 207406541 U CN207406541 U CN 207406541U
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- China
- Prior art keywords
- guide vane
- vane
- conservancy diversion
- water conservancy
- feed pump
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Abstract
The utility model discloses vane apparatus between a kind of steady formula grade of water conservancy diversion of boiler feed pump, including guide vane (3), guide vane bushing (1), equipped with guide vane piece (5) and back of the body guide vane (6) on the guide vane, shunting groove (8) is equipped on the back of the body guide vane, and is connected at the lower part of the back of the body guide vane and lengthens guide vane (9).Fastener hole (7) is additionally provided on the back of the body guide vane, the lengthening guide vane, which has, to be lengthened guide vane circular arc and connected between guide vane, guide vane bushing with arc structure transition.The utility model extends water conservancy diversion distance, shortens the distance of the secondary impeller entrance edge of blade of back of the body guide vane and feed pump, liquid is made steadily to flow into secondary impeller, effectively reduces interaction between whirlpool and pump shaft is collided.So as to improve centrifugal multistage pump multiple centrifugal pump unit operation stationarity, vibration parameters index is up to standard and safe.
Description
Technical field
The utility model is related to a kind of centrifugal multistage pump multiple centrifugal pump, a kind of feedwater used more particularly to power plant, industry and city
Vane apparatus between the grade of the boiler feed pump of occasion.
Background technology
Boiler feed pump is generally sectional type or double shell centrifugal multistage pump multiple centrifugal pump, is mainly used for middle pressure, sub-high pressure increase-volume and height
Boiler feedwater is pressed, pumped (conveying) medium is water, and temperature range is often between 104-160 DEG C, and flow is in 28-500m3/ h, outlet pressure
10-15MPa belongs to key centrifugal pump in the feed water system of boiler, often configures " the using and the reserved ", and the unit price of pump is generally 30
~80 ten thousand yuan.When its operating mode flow is in 300-500m3During/h, operating condition is changeable, make vibration values at the parts of bearings of pump >=
4.5mm/s (being more than related standard), belongs to substandard product, has certain hidden danger.If two feed pumps all scrams,
Water supply system will entirely stop, and will bring user and manufacturer brings sizable economic loss.The vibration of its parts of bearings surpasses
Main cause is marked between guide vane grade at leakage, liquid can generate whirlpool, back of the body guide vane and secondary impeller inlet side leaf on guide vane
Piece distance is big, causes water conservancy diversion unstable, the sufficient space that whirlpool collides pump shaft can be left for, so as to cause boiler feed pump
Parts of bearings vibration exceeding the standard.
The content of the invention
The purpose of the utility model is to overcome above deficiency, and provide a kind of boiler for reducing or eliminating water vortex to
Vane apparatus between the steady formula grade of water conservancy diversion of water pump.
The purpose of this utility model is realized by following technical solution：Guide vane between the steady formula grade of water conservancy diversion of boiler feed pump
Device including guide vane, guide vane bushing, is equipped with guide vane piece and back of the body guide vane on the guide vane, be equipped with and divide on the back of the body guide vane
Groove is flowed, and lengthening guide vane is connected at the lower part of the back of the body guide vane.
Fastener hole is additionally provided on the back of the body guide vane and in the side edge of shunting groove, the lengthening guide vane has
It lengthens guide vane circular arc and is connected between guide vane, guide vane bushing with arc structure transition.
After the utility model structure, liquid of the leakage at casing ring between grade has a high-energy, but with through leading
The liquid velocity direction that back of the body guide vane stream on leaf comes is different, and while generating whirlpool in the gap for shunting groove, whirlpool is again
By back of the body guide vane and guide vane segmentation is lengthened, energy is reduced, lengthens guide vane and guide vane, the circular arc of guide vane bushing are smoothly connected,
Steady water conservancy diversion is caused to flow to secondary impeller；Lengthen guide vane reduce whirlpool energy, and reduce with secondary impeller vane inlet away from
From, steady water conservancy diversion, effectively reduce interaction between whirlpool and pump shaft is collided.
Description of the drawings
Below in conjunction with the accompanying drawings and embodiment is described in further detail the utility model.
The structure diagram for the boiler feed pump that Fig. 1 is applied by the utility model.
Fig. 2 is the structure diagram of the utility model.
Specific embodiment
Referring to Fig. 2, vane apparatus between the steady formula grade of water conservancy diversion of the utility model (big flow) boiler feed pump, including guide vane
3rd, guide vane bushing 1, equipped with guide vane piece 5 and back of the body guide vane 6 on the guide vane 3, (towards secondary impeller) on the back of the body guide vane 6
Equipped with shunting groove 8, and it is connected at the lower part of the back of the body guide vane 6 and lengthens guide vane 9.
As shown in Fig. 2, it is additionally provided on the back of the body guide vane 6 and in the side edge of shunting groove 8 (towards secondary impeller)
Fastener hole 7, the lengthening guide vane 9 is with lengthening guide vane circular arc 11 and with arc structure between guide vane 3, guide vane bushing 1
10 transition connect, and are more advantageous to the steady water conservancy diversion of liquid.
Wherein, guide vane 3, guide vane bushing 1 are several, and guide vane 3 is coupled with guide vane bushing 1 by screw 2, is led described
Positioning groove 4 is housed on leaf 3 and at guide vane piece.Referring to Fig. 1, the big flow boiler that the utility model is applied centrifuges
Feed pump, including left bearing component 12, left pump cover 13, inlet segment 14, stage casing 16, water exit end 17, right pump cover 20, right bearing component
21st, pump shaft 24 (and casing ring 22, balancing device 18, balanced water returning pipe 19), it is built-in in the stage casing 16, water exit end 17
There are first stage impeller 15 (one), secondary impeller 23 (and casing ring 22, be corresponding several).The lengthening guide vane
9 end is sleeved in the entrance of secondary impeller 23 (several) of the boiler feed pump.
After the big flow boiler centrifugation feed pump (multistage) assembles, liquid enters first stage impeller from inlet segment 14
15, by the guide vane piece 5 on guide vane 3 by liquid guide flow to back of the body guide vane 6, then after the supercharging of secondary impeller 23, pressure rise, but
Liquid can occur to reveal between grade between casing ring 22 and secondary impeller 23 during gap flow direction back of the body guide vane 6, this liquid flow
Support or oppose guide vane 6 pressure can be more than from guide vane piece 5 flow to the back of the body guide vane 6 fluid pressure, two liquid stream layers can shunt it is recessed
The gap of slot 8 generates whirlpool.Meanwhile the whirlpool by back of the body guide vane 6 and lengthens guide vane 9 and splits again, reduces or the energy that dissipated
Amount.The lengthening guide vane 9 is with lengthening guide vane circular arc 11 and with 10 transition of arc structure between guide vane 3, guide vane bushing 1
Connect, lengthen guide vane 9 end be sleeved in secondary impeller 23, so as to extend water conservancy diversion distance, shorten the back of the body guide vane 6 with time
The distance of the entrance edge of blade of grade impeller 23, makes liquid steadily flow into secondary impeller 23, effectively reduces phase interaction between whirlpool
With and to pump shaft collision.The back of the body guide vane 6 be equipped with fastener hole 7 and by pin 26 and stage casing 16 in the horizontal direction
It is fastened；The guide vane 3 is equipped with positioning groove 4 and is consolidated in a rotational direction by slotted screw 25 and stage casing 16
It is fixed.In this way, whirlpool is cut in the punishment of shunting groove 8 on back of the body guide vane 6, while whirlpool energy is reduced or eliminated, also avoid
Caused extraneous vibration.
The utility model centrifuges feed pump smooth running for big flow boiler, and left and right parts of bearings vibration values are small, to reach
Mark plays the role of key.On the one hand, the property examined, stability that boiler centrifugation feed pump operates in water supply system are improved；
On the other hand, manufacturing enterprise's product quality is improved, there is higher competitive advantage；Also effectively prevent bringing rapid wear because of vibration
Part is replaced, and fund has been saved, with wide popularizing application prospect and certain market space.
Claims (2)
1. vane apparatus between the steady formula grade of the water conservancy diversion of boiler feed pump, including guide vane (3), guide vane bushing (1), on the guide vane (3)
Equipped with guide vane piece (5) and back of the body guide vane (6), it is characterised in that：Shunting groove (8) is equipped on the back of the body guide vane (6), and
It is connected at the lower part of the back of the body guide vane (6) and lengthens guide vane (9).
2. vane apparatus between the steady formula grade of the water conservancy diversion of boiler feed pump as described in claim 1, it is characterised in that：In the back of the body
Fastener hole (7) is additionally provided on guide vane (6) and in the side edge of shunting groove (8), the lengthening guide vane (9), which has, to be lengthened
Guide vane circular arc (11) and connected between guide vane (3), guide vane bushing (1) with arc structure (10) transition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720935934.3U CN207406541U (en) | 2017-07-28 | 2017-07-28 | Vane apparatus between the steady formula grade of water conservancy diversion of boiler feed pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720935934.3U CN207406541U (en) | 2017-07-28 | 2017-07-28 | Vane apparatus between the steady formula grade of water conservancy diversion of boiler feed pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207406541U true CN207406541U (en) | 2018-05-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720935934.3U Active CN207406541U (en) | 2017-07-28 | 2017-07-28 | Vane apparatus between the steady formula grade of water conservancy diversion of boiler feed pump |
Country Status (1)
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| CN (1) | CN207406541U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110081024A (en) * | 2019-03-25 | 2019-08-02 | 沈阳鼓风机集团股份有限公司 | A kind of multistage centrifugal pump and its processing method |
-
2017
- 2017-07-28 CN CN201720935934.3U patent/CN207406541U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110081024A (en) * | 2019-03-25 | 2019-08-02 | 沈阳鼓风机集团股份有限公司 | A kind of multistage centrifugal pump and its processing method |
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