CN102235369B - Centrifugal pump - Google Patents
Centrifugal pump Download PDFInfo
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- CN102235369B CN102235369B CN 201110223149 CN201110223149A CN102235369B CN 102235369 B CN102235369 B CN 102235369B CN 201110223149 CN201110223149 CN 201110223149 CN 201110223149 A CN201110223149 A CN 201110223149A CN 102235369 B CN102235369 B CN 102235369B
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- inner housing
- central shaft
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Abstract
The invention provides a centrifugal pump and particularly relates to the centrifugal pump used in a coal chemical device. The centrifugal pump comprises a central shaft, a rotor part, an inner casing and an outer casing, wherein the central shaft is connected to a driving motor; the rotor part is sleeved on the central shaft; the inner casing is sleeved on the central shaft and comprises a first inner casing and a second inner casing which are symmetrically arranged at two sides of the rotor part along the central shaft; and the inner casing is arranged in the outer casing and is fixedly connected with the outer casing; a branched feeding flow channel is arranged at the feeding side of the outer casing; a discharge flow channel is arranged at the discharge side of the outer casing; the branched feeding flow channel is provided with a branched feeding end which is respectively communicated with a first conveying flow channel in the first inner casing and a second conveying flow channel in the second inner casing; and the first conveying flow channel and the second conveying flow channel are joined at the discharge flow channel. The centrifugal pump disclosed by the invention is suitable for the work station of high flow or greater inlet pressure and is also suitable for conveying slag slurry with corrosive performance or high-temperature medium, and simultaneously, a pump body is simpler and more convenient to maintain and replace.
Description
Technical field
The present invention relates to centrifugal pump, the centrifugal pump that particularly uses in coal chemical engineering equipment.
Background technique
In coal chemical technology, the solid mixture that centrifugal type slurry pump can be more intense for delivery of abrasion, contain the strong solid particle is as ore pulp, lime-ash, cement slurry, mortar, grit etc.Existing centrifugal type slurry pump allows impurity content usually between 3～5%, and usually relates to its solid content of coal slurry of carrying in the conveying, particularly coal liquefaction craft of coal slurry in Coal Chemical Industry technique up to 40%wt, solid particle diameter＜20 micron.in course of conveying, if quantity delivered is very large or inlet pressure when higher, can cause the impeller in centrifugal pump to bear very large load, and being difficult to effectively convection cell controls so that impeller bears uniform load, cause pump to work, and the coal slurry solid content of carrying is high, impeller to High Rotation Speed washes away very severe, after impeller weares and teares, usually the centrifugal pump of structure is difficult to repair and replacement, simultaneously, also dissolved the part inflammable gas in the high temperature coal slurry (as hydrogen, light component oil gas), if in coal slurry, this part contained gas leaks in atmosphere and will become inflammable gas, spontaneous combustion occurs, therefore, need also to guarantee that centrifugal pump has good sealing.
Summary of the invention
An object of the present invention is to provide a kind of centrifugal pump, it can solve above-mentioned prior art problem at least one.
For above-mentioned purpose, a kind of centrifugal pump is provided according to an aspect of the present invention, it comprises: central shaft is connected in drive motor; Rotor part is set on central shaft; Inner housing is set on central shaft, comprises the first inner housing and the second inner housing that are arranged symmetrically in the rotor part both sides along central shaft; Frame, inner housing are arranged in frame and with frame and are fixedly connected with; Wherein, the feed side of frame is provided with bifurcated charging runner and exit side is provided with the discharging runner, feed side and exit side are separately positioned on the both sides of central shaft, bifurcated incoming flow road have respectively with the first inner housing in the first conveying flow passage and the bifurcated feed end that is communicated with of the second conveying flow passage in the second inner housing, the first conveying flow passage and the second conveying flow passage meet at the discharging runner.
Particularly, according to the centrifugal pump of one aspect of the invention, wherein, be provided with the fixed guide key between frame and inner housing, and frame is equipped with pump cover along the two ends of central shaft, pump cover is enclosed in inside with inner housing together with frame.
Particularly, according to the centrifugal pump of one aspect of the invention, wherein, be provided with expansion loop between pump cover and inner housing.
Particularly, according to the centrifugal pump of one aspect of the invention, wherein, vertically hold for two of central shaft and be provided with cartridge seal, cartridge seal comprises the multi-stage mechanical sealing that is made of Sealing and bearing.
Particularly, according to the centrifugal pump of one aspect of the invention, wherein, frame also comprises: cylindrical body, inner housing are arranged in cylindrical body; Charging portion and discharging portion are separately positioned on feed side and are connected with exit side and are connected with cylindrical body, and bifurcated charging runner is formed in charging portion, and the discharging runner is formed in discharging portion.
Particularly, according to the centrifugal pump of one aspect of the invention, wherein, charging portion and discharging portion and cylindrical body form integratedly or independently.
Particularly, centrifugal pump according to one aspect of the invention, wherein, frame also comprises: flange bending and flange straight tube, all be arranged at the feed side of cylindrical body and be connected in cylindrical body, flange bending has the heat-conducting medium input channel that is communicated with heat-conducting medium input channel in cylindrical body, and the flange straight tube has the heat-conducting medium output channel that is communicated with heat-conducting medium output channel in cylindrical body, and flange bending is arranged on the flange straight tube outside.
Particularly, according to the centrifugal pump of one aspect of the invention, wherein, frame comprises: the flanged tee pipe, and be arranged on the exit side of frame and be connected in cylindrical body, the flanged tee pipe is communicated with the discharging runner.
Particularly, according to the centrifugal pump of one aspect of the invention, wherein, charging portion central authorities are formed with boss, and boss central authorities are formed with groove.
Particularly, according to the centrifugal pump of one aspect of the invention, wherein, rotor part and inner housing are made by nickel Hart alloy NCA-1.
The present invention has following technique effect:
Adopt the double hulled structure of double suction according to centrifugal pump of the present invention, thereby be applicable to large flow or have the operating mode of very big inlet pressure, and be applicable to carry slag slurry or the high temperature media with Abrasion properties, also make simultaneously the maintain and replace of the pump housing easier.
More technique effects will describe in conjunction with embodiment hereinafter.
Should be appreciated that, above generality is described and the following detailed description is all enumerated and illustrative, and purpose is for to the claimed further instruction that the invention provides.
Description of drawings
Accompanying drawing consists of the part of this specification, is used for helping further to understand the present invention.These accompanying drawings illustrate some embodiments of the present invention, and are used for illustrating principle of the present invention together with specification.Identical parts represent with identical label in the accompanying drawings.In accompanying drawing:
The centrifugal pump that Fig. 1 a shows according to embodiment of the present invention totally assembles sectional arrangement drawing;
Fig. 1 b shows the side view of the centrifugal pump in Fig. 1 a; And
Fig. 2 shows the structural representation according to the pump housing part of the centrifugal pump of embodiment of the present invention.
Embodiment
At first with reference to accompanying drawing, the centrifugal pump of embodiment of the present invention and the basic comprising of pump housing part are described.
At first with reference to Fig. 1 a and Fig. 1 b, wherein show the general assembly drawing of the centrifugal pump of an embodiment according to the present invention.As shown in the figure, centrifugal pump in this mode of execution is double suction Double-casing formula centrifugal pump, and its major part comprises: dust cover 1, central shaft 2, unit loading type machine envelope 3, pump cover 4, flange bending 5, seal ring 6,9, expansion loop 7, flange straight tube 8, impeller (rotor part) 10, inner housing l1, frame 12, floating bushing 13, floating ring 14, spring 15, floating ring gland 16, cooling chamber cap 17 (shown in Fig. 1 b), interstage sleeve 18, Hough block 19, the pump housing 20, flanged tee pipe 21.
Then with reference to Fig. 1, wherein show the structural representation of the centrifugal pump body part of the embodiment according to the present invention.As shown in Figure 2, the double suction Double-casing formula pump housing of this mode of execution mainly is comprised of following: frame 12, inner housing 11, fixed guide key 22, screw 23, expansion loop 7, pump cover 4, impeller (rotor part) 10.
Below, with continue with reference to accompanying drawing to centrifugal pump of the present invention with and the concrete make of the pump housing be described in detail.
With reference to Fig. 2, wherein show the pump housing part according to the centrifugal pump of a mode of execution, it comprises: central shaft 2, its be connected in the drive motor (not shown) with transmission of power to the moving element in centrifugal pump (for example impeller 10); Impeller (rotor part) 10, it is set on central shaft 2 and with central shaft 2 and rotates; Inner housing 11, it is set on central shaft 2 equally, and according to the present invention, inner housing 11 comprises the first inner housing 11a and the second inner housing 11b that is arranged symmetrically in impeller 10 both sides along central shaft 2; Frame 12, inner housing 11 are arranged in this frame 12.More specifically, frame 12 has a bifurcated charging runner 12a and a discharging runner 12b who lays respectively at central shaft 2 both sides, and wherein, bifurcated charging runner 12a is positioned at the feed side of frame 12, and discharging runner 12b is positioned at the exit side of frame.And then, bifurcated charging runner 12a have respectively with the first inner housing 11a in the first conveying flow passage 11c and the second conveying flow passage 11d in the second inner housing 11b the bifurcated feed end 12c, the 12d that are communicated with, the first conveying flow passage 11c and the second conveying flow passage 11d meet at discharging runner 12b.
According to the centrifugal pump body structure of the invention described above, after flowing medium is inhaled into from the import of bifurcated charging runner 12a, be divided into two-way along the path of bifurcated runner, the first conveying flow passage 11c and the second conveying flow passage 11d from impeller 10 left and right sides passes through respectively.Medium is divided into two-way after entering pump cavity, stressedly when making impeller 10 acting evenly extends the working life of impeller 10, thereby it is very large or have an operating mode of very big inlet pressure to be highly suitable for rate-of flow.Then, under the effect of the rotational motion of impeller 10, boosted converging subsequently of material is one road discharging runner 12b output from frame 12, reaches thus the purpose of the large flow output of conveying high-pressure.In addition, inner housing 11 is divided into two parts of bilateral symmetry two, when this makes inner housing 11 keep in repair after wearing and tearing, but left and right part mutual noninterference keep in repair respectively and change, and do not affect the pipe-line system of pump outside.
Further, according to centrifugal pump of the present invention, wherein, be provided with fixed guide key 22 (as shown in fig. 1) between frame 12 and inner housing 11, this fixed guide key 22 is used for when inner housing 11 is installed to frame 12 fixedly the mounting point of inner housing 11 and determines its installation direction, and can prevent after installing that inner housing 11 from following impeller 10 rotations.Simultaneously, can fixed guide key 22 be fixed to inner housing 11 with screw 23.In addition, frame 12 is equipped with pump cover 1 along the two ends of central shaft 2, and pump cover 1 is enclosed in inside with inner housing 11 together with frame 12, realize the axial restraint of inner housing 11 by pump cover 4.
Preferably, be provided with expansion loop 7 between pump cover 1 and inner housing 11.In the course of the work, due to the pump body temperature difference larger with extraneous existence, also there is the temperature difference between inner housing 11 and frame 12, thereby heat distortion amount both is also just different, the heat distortion amount of inner housing 11 inside is greater than the heat distortion amount of frame 12, the existence of expansion loop 7 can compensate the difference of this heat distortion amount, thereby reduces thermal stress.
Further, in the centrifugal pump of present embodiment, also comprise the cartridge seal 3 that is arranged on central shaft 2 two ends, this cartridge seal comprises the multi-stage mechanical sealing that is made of Sealing and bearing, as shown in fig. 1, the cartridge seal 3 that wherein adopts comprises a plurality of sealing blocks and bearing and is arranged on seal ring between them.Adopt this cartridge seal 3 can effectively improve the overall sealing performance of centrifugal pump.
Next, with reference to Fig. 2, the centrifugal pump body structure of the embodiment according to the present invention is described.In the mode of execution of Fig. 2, the frame 12 of pump body structure comprises: cylindrical body 12e, inner housing 11 are arranged in cylindrical body 12e; Charging portion 12f and discharging portion 12g, (feed side that namely is separately positioned on frame is connected with exit side and is connected with cylindrical body 12e to lay respectively at central shaft 2 both sides, wherein bifurcated charging runner 12a is formed in charging portion 12f, and discharging runner 12b is formed in discharging portion 12g.In mode of execution shown in Figure 2, charging portion 12f and discharging portion 12g and cylindrical body 12e form, and as can be seen from Fig. 2, charging portion 12f and discharging portion 12g extend to form from cylindrical body 12e.Certainly, in other embodiments, charging portion 12f and discharging portion 12g and cylindrical body 12e form independently, and for example, the pump body structure shown in Fig. 1 has just adopted discharging portion (being configured to a flanged tee pipe 21) discretely.
Further, as shown in Figure 1, frame 12 comprises flange bending 5 and flange straight tube 8, and it all is arranged on the feed side (namely being arranged on homonymy with charging portion 12f) of frame 12 and is connected in cylindrical body 12e.Flange bending 5 has the heat-conducting medium input channel that is communicated with heat-conducting medium input channel in cylindrical body 12e, in order to heat-conducting medium is inputed in the pump housing, flange straight tube 8 has the heat-conducting medium output channel that is communicated with heat-conducting medium output channel in cylindrical body 12e, in order to heat-conducting medium is exported in the pump housing.And in illustrated embodiment, be provided with two flange bendings 5 and three flange straight tube 8 (not shown)s, and flange bending 5 is arranged on flange straight tube 8 outsides.Here, the effect of heat-conducting medium is for cooling to carrying out due to transmission high-temperature material and the pump housing of heating, thereby keeps pump (the especially Sealing in the pump housing) operation at a lower temperature, thereby extends the working life of pump.Preferably, the mode that centrifugal pump of the present invention adopts air and water-cooled to combine is in order to obtain better cooling effect.
And then, as above, also be provided with flanged tee pipe 21 on the frame 12 of the centrifugal pump in Fig. 1 mode of execution, it is arranged on the exit side of frame 12 and is connected in cylindrical body 12e, and this flanged tee pipe 21 is communicated with discharging runner 12b.In this embodiment, flanged tee pipe 21 namely uses as the discharging portion 12g of frame 12.Thus, can will deliver to respectively two different upstream devices from the material of pump housing output.
Especially, can see with reference to figure 2, the central authorities of charging portion 12f are formed with boss 12h.This boss 12h is used for supporting the first inner housing 11a and the second inner housing 11b of the left and right sides on the one hand; On the other hand, boss 12h is divided into two-part with the top plan of charging portion 12f, makes like this top surface difficulty of processing of charging portion 12f reduce.In addition, the lower corner of the first inner housing 11a and the second inner housing 11b all is formed with the recessed structure that coordinates with boss 12h, and the structure that this boss 12h matches with reentrant part also makes it possible to obtain better Fluid Sealing.Further, owing to needing to form the necessary flowing space between the top plan of impeller 10 and charging portion 12f, therefore, be formed with groove 12i in the central authorities (that is, the position corresponding with the outer rim of impeller 10) of boss 12h.The degree of depth of this groove 12i for example can be between 10mm～20mm, and this flow is as required determined.
In addition, above-mentioned flange straight tube 8, flange bending 5 and flanged tee pipe 21 can connect with welding to cylindrical body 12e.
Particularly, according to centrifugal pump of the present invention, wherein the material of each major part and number are preferably as follows shown in table 1, and especially impeller 10 and inner housing 12 are made by nickel Hart alloy NCA-1, can improve its abrasion resistance properties.
Table 1
| Reference number | Part name | Material | Number |
| 1 | Dust cover | Corrosion resistant plate | 1 |
| 2 | Central shaft | 42CrMo | 1 | |
| 3 | Integrated |
2 | ||
| 4 | | 1Cr13 | 2 | |
| 5 | | 1Cr18Ni9Ti | 2 | |
| 6 | Seal ring | Graphite | 2 | |
| 7 | |
2 | ||
| 8 | The flange straight tube | 1Cr18Ni9Ti | 3 | |
| 9 | | Graphite | 2 | |
| 10 | Impeller | NCA-1 | 1 | |
| 11 | Inner housing | NCA-1 | 2 | |
| 12 | Axle sleeve | NCA-1 | 2 | |
| 13 | Floating | 1Cr18Ni9Ti | 2 | |
| 14 | Floating | 35CrMo | 2 | |
| 15 | | 30W4Cr2VA | 8 | |
| 16 | The floating | 1Cr18Ni9Ti | 2 | |
| 17 | Cooling | 1Cr13 | 4 | |
| 18 | | 35CrMo | 2 | |
| 19 | The Hough | 35CrMo | 4 | |
| 20 | The pump housing | NCA-1 | 1 | |
| 21 | The flanged tee pipe | 1Cr18Ni9Ti | 1 |
These are only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.All any modifications of doing within the spirit and principles in the present invention, be equal to replacement, improvement etc., within protection scope of the present invention all should be included in.
Claims (9)
1. a centrifugal pump, is characterized in that, comprising:
Central shaft (2) is connected in drive motor;
Rotor part (10) is set on described central shaft (2);
Inner housing (11) is set on described central shaft (2), comprises the first inner housing (11a) and the second inner housing (11b) that are arranged symmetrically in described rotor part (10) both sides along described central shaft (2);
Frame (12), described inner housing (11) are arranged in described frame (12) and with described frame (12) and are fixedly connected with;
wherein, the feed side of described frame (12) is provided with bifurcated charging runner (12a) and exit side is provided with discharging runner (12b), described feed side and exit side are separately positioned on the both sides of described central shaft (2), described bifurcated charging runner (12a) have respectively with described the first inner housing (11a) in the first conveying flow passage (11c) and the bifurcated feed end (12c that is communicated with of interior the second conveying flow passage (11d) of the second inner housing (11b), 12d), described the first conveying flow passage (11c) and the second conveying flow passage (11d) meet at described discharging runner (12b), and wherein, the type of cooling that described centrifugal pump adopts air cooling and water-cooled to combine.
2. centrifugal pump according to claim 1, is characterized in that,
Be provided with fixed guide key (22) between described frame (12) and described inner housing (11), and described frame (12) is equipped with pump cover (4) along the two ends of described central shaft (2), and described pump cover (4) is enclosed in inside with described inner housing (11) together with described frame (12).
3. centrifugal pump according to claim 2, is characterized in that, is provided with expansion loop (7) between described pump cover (4) and described inner housing (11).
4. centrifugal pump according to claim 1, is characterized in that, vertically holds for two of described central shaft (2) and be provided with cartridge seal (3), and described cartridge seal (3) comprises the multi-stage mechanical sealing that is made of Sealing and bearing.
5. centrifugal pump according to claim 1, is characterized in that, described frame (12) comprising:
Cylindrical body (12e), described inner housing (11) are arranged in described cylindrical body (12e);
Charging portion (12f) and discharging portion (12g), being separately positioned on described feed side is connected with exit side and is connected with described cylindrical body (12e), described bifurcated charging runner (12a) is formed in described charging portion (12f), and described discharging runner (12b) is formed in described discharging portion (12g).
6. centrifugal pump according to claim 5, is characterized in that,
Described charging portion (12f) and discharging portion (12g) form integratedly or independently with described cylindrical body (12e).
7. centrifugal pump according to claim 5, is characterized in that, described frame (12) also comprises:
Flange bending (5) and flange straight tube (8), all be arranged at the feed side of described cylindrical body (12e) and be connected in described cylindrical body (12e), described flange bending (5) have with described cylindrical body (12e) in the heat-conducting medium input channel that is communicated with of heat-conducting medium input channel, described flange straight tube (8) have with described cylindrical body (12e) in the heat-conducting medium output channel that is communicated with of heat-conducting medium output channel, and described flange bending (5) is arranged on outside described flange straight tube (8).
8. according to claim 5 or 7 described centrifugal pumps, is characterized in that, described frame (12) also comprises:
Flanged tee pipe (21) is arranged on the exit side of described frame (12) and is connected in described cylindrical body (12e), and described flanged tee pipe (21) is communicated with described discharging runner (12b).
9. centrifugal pump according to claim 8, is characterized in that, described charging portion (12f) central authorities are formed with boss (12h), and described boss central authorities are formed with groove (12i).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110223149 CN102235369B (en) | 2011-08-04 | 2011-08-04 | Centrifugal pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110223149 CN102235369B (en) | 2011-08-04 | 2011-08-04 | Centrifugal pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102235369A CN102235369A (en) | 2011-11-09 |
| CN102235369B true CN102235369B (en) | 2013-05-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110223149 Active CN102235369B (en) | 2011-08-04 | 2011-08-04 | Centrifugal pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102235369B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6236810B2 (en) * | 2013-03-14 | 2017-11-29 | 日本電産株式会社 | pump |
| CN108194383A (en) * | 2017-12-21 | 2018-06-22 | 江苏双轮泵业机械制造有限公司 | A kind of centrifugal pump system |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1030809A (en) * | 1975-12-15 | 1978-05-09 | Rowland E. Ball | Double suction centrifugal pump |
| CN200958478Y (en) * | 2006-09-29 | 2007-10-10 | 赖轩明 | Split centrifugal pump |
| CN201190694Y (en) * | 2008-03-26 | 2009-02-04 | 山东双轮集团股份有限公司 | Water sealing apparatus for radially split double suction centrifugal pump |
| CN201351636Y (en) * | 2008-12-16 | 2009-11-25 | 神华集团有限责任公司 | High-temperature coal pulp pump |
| CN202203122U (en) * | 2011-08-04 | 2012-04-25 | 神华集团有限责任公司 | Centrifugal pump |
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2011
- 2011-08-04 CN CN 201110223149 patent/CN102235369B/en active Active
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