CN207033763U - The steady low formula boiler feed pump that shakes of water conservancy diversion - Google Patents
The steady low formula boiler feed pump that shakes of water conservancy diversion Download PDFInfo
- Publication number
- CN207033763U CN207033763U CN201720935897.6U CN201720935897U CN207033763U CN 207033763 U CN207033763 U CN 207033763U CN 201720935897 U CN201720935897 U CN 201720935897U CN 207033763 U CN207033763 U CN 207033763U
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- China
- Prior art keywords
- guide vane
- stator
- body guide
- conservancy diversion
- water conservancy
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Abstract
The utility model discloses a kind of steady low formula boiler feed pump that shakes of water conservancy diversion, including inlet segment (14), stage casing (16), water exit end (17) etc., equipped with guide vane piece (5) and back of the body guide vane (6) on its stator, shunting groove (8) is provided with the back of the body guide vane, and is connected with the bottom of the back of the body guide vane and to lengthen guide vane (9) and to be enclosed on entering for secondary impeller (23) intraoral.Fastener hole (7) is additionally provided with back of the body guide vane, detent (4) is housed on stator.The utility model extends water conservancy diversion distance, shortens the distance of back of the body guide vane and secondary impeller entrance edge of blade, liquid is steadily flowed into secondary impeller, effectively reduces the interphase interaction of whirlpool and pump shaft is collided.And respectively by fastener hole and pin, detent and slotted screw and stage casing in the horizontal direction with fastened on direction of rotation, avoid causing extraneous vibration, improve pump assembly running stability, its vibration parameters index is up to standard and safe.
Description
Technical field
The present invention relates to a kind of centrifugal multistage pump multiple centrifugal pump, a kind of feedwater occasion used more particularly to power plant, industry and city
Boiler feed pump.
Background technology
Boiler feed pump is generally sectional type or double shell centrifugal multistage pump multiple centrifugal pump, is mainly used in 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, key centrifugal pump is belonged in the feed water system of boiler, often configure " the using and the reserved ", the unit price of its pump is typically 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 (has exceeded relevant 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 stator level at leakage, liquid can produce whirlpool, back of the body guide vane and secondary impeller inlet side leaf on stator
Piece distance is big, causes water conservancy diversion unstable, the sufficient space that whirlpool is collided to 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
It is an object of the invention to overcoming the above insufficient, and provide it is a kind of reduce or eliminate water vortex, low vibration is led
The steady low formula boiler feed pump that shakes of levelling.
The purpose of the present invention is realized by following technical solution：The steady low formula boiler feed pump that shakes of water conservancy diversion, including left axle
Bearing portion part, left pump cover, inlet segment, stage casing, water exit end, right pump cover, right bearing part, pump shaft, the stage casing built with stator,
First stage impeller, secondary impeller, equipped with guide vane piece and back of the body guide vane on the stator, be provided with the back of the body guide vane shunt it is recessed
Groove, and lengthening guide vane is connected with the bottom of the back of the body guide vane, the end for lengthening guide vane is enclosed on secondary impeller
Enter it is intraoral.
Fastener hole is additionally provided with the back of the body guide vane and is fastened in the horizontal direction with stage casing by pin, in institute
State on stator and consolidated in a rotational direction by slotted screw and stage casing equipped with detent at guide vane piece
Fixed, the lengthening guide vane, which has, to be lengthened guide vane circular arc and is connected between stator, guide vane bushing with arc structure transition.
After structure of the present invention, liquid of the leakage at casing ring between level has a high-energy, but with through on stator
The liquid velocity direction come of back of the body guide vane stream it is different, while producing whirlpool in the gap for shunting groove, whirlpool is carried on the back again
Guide vane and lengthening guide vane segmentation, reduce energy, lengthen guide vane and stator, the circular arc of guide vane bushing are smoothly connected, cause to put down
Steady water conservancy diversion flows to secondary impeller；Lengthen guide vane and reduce whirlpool energy, and reduce the distance with secondary impeller vane inlet, its
Steady water conservancy diversion, effectively reduce the interphase interaction of whirlpool and pump shaft is collided.In addition, fastener hole and pin, detent
And the setting of slotted screw, it can effectively reduce or eliminate whirlpool energy and prevent from causing extraneous vibration.
Brief description of the drawings
Below in conjunction with the accompanying drawings and embodiment the present invention is described in further detail.
Fig. 1 is the structural representation of the present invention.
Fig. 2 is the structural representation of vane apparatus between the steady formula level of water conservancy diversion in Fig. 1.
Embodiment
It can be seen from Fig. 1, Fig. 2, the steady low formula boiler feed pump that shakes (big flow is multistage) of water conservancy diversion of the present invention, including left bearing
Part 12, left pump cover 13, inlet segment 14, stage casing 16, water exit end 17, right pump cover 20, right bearing part 21, (and the shell of pump shaft 24
Body sealing ring 22, bascule 18, balanced water returning pipe 19), in the stage casing 16 built with stator 3 (and guide vane bushing 1), chopped-off head
Impeller 15 (one), secondary impeller 23 (and casing ring 22, be corresponding to several, last secondary impeller is mounted in
In water exit end 17), equipped with guide vane piece 5 and back of the body guide vane 6 on the stator 3, (towards secondary impeller) on the back of the body guide vane 6
Provided with shunting groove 8, and it is connected with the bottom of the back of the body guide vane 6 and lengthens guide vane 9, the end for lengthening guide vane 9
It is intraoral that end is enclosed on entering for secondary impeller 23 (several).
As shown in figure 1, fastener hole 7 is additionally provided with (towards secondary impeller) on the back of the body guide vane 6 and by pin 26 with
Stage casing 16 is fastened in the horizontal direction, is passed through on the stator 3 and equipped with detent 4 at guide vane piece
Slotted screw 25 is fixed in a rotational direction with stage casing 16, the lengthening guide vane 9 have lengthen guide vane circular arc 11 and
Connected between stator 3, guide vane bushing 1 with the transition of arc structure 10, be more beneficial for the steady water conservancy diversion of liquid.The back of the body guide vane
6 are provided with detent 4 and slotted screw 25 provided with fastener hole 7 and pin, the stator 3, the shunting on back of the body guide vane
Groove splits whirlpool, while whirlpool energy is reduced or eliminated, it also avoid caused extraneous vibration.
As shown in Fig. 2 the stator 3, guide vane bushing 1, guide vane piece 5 and back of the body guide vane 6 etc. form the steady formula level of water conservancy diversion
Between vane apparatus.Wherein, stator 3, guide vane bushing 1 are several, and stator 3 is coupled with guide vane bushing 1 by screw 2.
Referring to Fig. 1, after present invention assembling, liquid enters first stage impeller 15 from inlet segment 14, by just leading on stator 3
Liquid guide flow is extremely carried on the back guide vane 6 by blade 5, then after the supercharging of secondary impeller 23, pressure rise, but liquid is in casing ring 22
It can occur to reveal between level during gap flow direction back of the body guide vane 6 between secondary impeller 23, this liquid flow supports or opposes the pressure meeting of guide vane 6
More than the fluid pressure that back of the body guide vane 6 is flowed to from guide vane piece 5, two liquid stream layers can produce whirlpool in the gap of shunting groove 8.
Meanwhile the whirlpool by back of the body guide vane 6 and lengthens guide vane 9 and split again, reduces or the energy that dissipated.The lengthening guide vane 9 has
Have and lengthen guide vane circular arc 11 and connected between stator 3, guide vane bushing 1 with the transition of arc structure 10, lengthen the end of guide vane 9
End is enclosed in secondary impeller 23, so as to extend water conservancy diversion distance, shortens back of the body guide vane 6 and the entrance edge of blade of secondary impeller 23
Distance, liquid is steadily flowed into secondary impeller 23, effectively reduce the interphase interaction of whirlpool and the collision to pump shaft.
The present invention centrifuges feed pump smooth running for big flow boiler, and left and right parts of bearings vibration values are small, is up to standard
To key effect.On the one hand, the property examined, stability that boiler centrifugation feed pump operates in water supply system are improved；It is another
Aspect, manufacturing enterprise's product quality is improved, there is higher competitive advantage；Also effectively prevent because vibration brings consumable accessory more
Change, saved fund, it has wide popularizing application prospect and certain market space.
Claims (2)
1. the steady low formula boiler feed pump that shakes of water conservancy diversion, including left bearing part (12), left pump cover (13), inlet segment (14), stage casing
(16), water exit end (17), right pump cover (20), right bearing part (21), pump shaft (24), in the stage casing (16) built with stator
(3), first stage impeller (15), secondary impeller (23), equipped with guide vane piece (5) and guide vane (6), its feature are carried on the back on the stator (3)
It is：Shunting groove (8) is provided with the back of the body guide vane (6), and lengthening is connected with the bottom of the back of the body guide vane (6)
Guide vane (9), and to be enclosed on entering for secondary impeller (23) intraoral for the end for lengthening guide vane (9).
2. the steady low formula boiler feed pump that shakes of water conservancy diversion as claimed in claim 1, it is characterised in that：In the back of the body guide vane (6)
On be additionally provided with fastener hole (7) and fastened in the horizontal direction with stage casing (16) by pin (26), in the stator (3)
Obtained in a rotational direction by slotted screw (25) and stage casing (16) equipped with detent (4) at upper and close guide vane piece
With fixation, the lengthening guide vane (9) is with lengthening guide vane circular arc (11) and with circle between stator (3), guide vane bushing (1)
Arc structure (10) transition connects.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720935897.6U CN207033763U (en) | 2017-07-28 | 2017-07-28 | The steady low formula boiler feed pump that shakes of water conservancy diversion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720935897.6U CN207033763U (en) | 2017-07-28 | 2017-07-28 | The steady low formula boiler feed pump that shakes of water conservancy diversion |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207033763U true CN207033763U (en) | 2018-02-23 |
Family
ID=61463367
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720935897.6U Active CN207033763U (en) | 2017-07-28 | 2017-07-28 | The steady low formula boiler feed pump that shakes of water conservancy diversion |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207033763U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108071594A (en) * | 2017-07-28 | 2018-05-25 | 林佳 | The steady low formula boiler feed pump that shakes of water conservancy diversion |
-
2017
- 2017-07-28 CN CN201720935897.6U patent/CN207033763U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108071594A (en) * | 2017-07-28 | 2018-05-25 | 林佳 | The steady low formula boiler feed pump that shakes of water conservancy diversion |
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