CN212508958U - Double-suction centrifugal pump - Google Patents
Double-suction centrifugal pump Download PDFInfo
- Publication number
- CN212508958U CN212508958U CN202021174154.XU CN202021174154U CN212508958U CN 212508958 U CN212508958 U CN 212508958U CN 202021174154 U CN202021174154 U CN 202021174154U CN 212508958 U CN212508958 U CN 212508958U
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- impeller
- shell
- baffle
- connecting rod
- rod
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- 238000007789 sealing Methods 0.000 claims abstract description 45
- 230000002093 peripheral effect Effects 0.000 claims abstract description 11
- 238000006073 displacement reaction Methods 0.000 abstract description 3
- 230000000694 effects Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 210000004907 gland Anatomy 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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Abstract
The utility model relates to a centrifugal pump technical field discloses a double entry centrifugal pump, include: the impeller and the baffle plate are covered on the impeller, and a sealing device is arranged between the impeller and the baffle plate; the impeller is characterized in that a connecting rod is arranged on one side of the impeller, a flange is arranged on the end face, close to the sealing device, of the connecting rod, the flange extends towards the center direction far away from the impeller, the flange penetrates through the first end of the sealing device to enable the impeller to be connected with the sealing device, and the baffle is fixedly connected with the outer peripheral wall of the sealing device. The embodiment of the utility model provides a pair of double suction centrifugal pump, through the sealing device of design between impeller and baffle, when impeller and baffle produced axial relative displacement, the connecting rod of adjusting the impeller got into sealing device's length, has realized the adjustment of sealed length between impeller and baffle to the leakproofness between impeller and the baffle has been strengthened, and then the efficiency of improvement pump.
Description
Technical Field
The utility model relates to a centrifugal pump technical field, in particular to double entry centrifugal pump.
Background
The double suction pump has the advantages of large flow, high lift and large parameter range, the double suction pump structure is supported by bearings at two ends, and the impeller is arranged in the middle, so the structure is reasonable and stable, and the double suction pump is widely applied to important occasions needing a large amount of water, such as steel plants, power plants, water plants and the like.
The application numbers are: 201920832333.9 discloses a high-efficiency double-suction centrifugal pump, which comprises an upper pump case, a lower pump case, an impeller, a shaft sleeve, a key, a mechanical seal gland and a mechanical seal, wherein the upper pump case and the lower pump case jointly form a pump body, the impeller is fixed at the middle part of the shaft through the key, the two ends of the shaft are rotationally connected with the upper pump case and the lower pump case through a bearing body part and a bearing, the two ends of the shaft sleeve are fixed with baffle plates through shaft sleeve nuts, a second seal ring is arranged between the baffle plates and the impeller, and a seal ring and a first seal ring are arranged at the positions of the upper pump case and the lower pump. The first sealing ring is additionally arranged at the matching position of the sealing ring and the pump shell, so that high-low pressure flow is eliminated, the efficiency of the pump is improved, and the use reliability is improved.
In above-mentioned patent, thereby because baffle and impeller can produce relative rotation and make both produce axial relative displacement, above-mentioned patent has only simply set up the sealing washer, nevertheless sealed length can't be adjusted, so baffle and impeller have the clearance to produce, can't reach sealed effect to can't improve the efficiency of pump.
SUMMERY OF THE UTILITY MODEL
The utility model provides a double suction centrifugal pump, aim at provide a sealed length's between adjustment baffle and impeller double suction centrifugal pump, strengthen the sealed effect between pump case and the impeller, and then improve centrifugal pump's efficiency.
A double suction centrifugal pump comprising: the impeller and the baffle plate are covered on the impeller, and a sealing device is arranged between the impeller and the baffle plate;
one side of the impeller is provided with a connecting rod, the end face, close to the sealing device, of the connecting rod is provided with a flange, the flange extends towards the direction far away from the center of the impeller, and the flange penetrates through the first end of the sealing device and extends into the sealing device so as to connect the connecting rod with the first end of the sealing device in a sealing mode;
the baffle is fixedly connected with the outer peripheral wall of the sealing device;
wherein, sealing device includes: a housing and a linkage;
the outer shell is a sleeve body, the outer diameter of the flange is equal to the inner diameter of the outer shell, the flange penetrates into the first end of the outer shell, and the end face, close to the impeller, of the baffle is fixedly connected with the outer peripheral wall of the outer shell so as to connect the outer shell with the baffle;
the linkage mechanism is fixed inside the shell, and the linkage mechanism limits the flange inside the shell so as to connect the connecting rod with the shell.
Preferably, the linkage mechanism includes: the first swing rod, the second swing rod, the first connecting rod and the second connecting rod;
the first end of the first swing rod is rotatably connected with the inner wall of the shell close to the second end;
the first end of the second swing rod is pivoted with the second end of the first swing rod;
the first end of the first connecting rod is pivoted with the second end of the second swing rod;
the first end of the second connecting rod is pivoted with the second end of the first connecting rod;
the second end of the second connecting rod is rotatably connected with the inner wall of the flange so as to connect the flange with the shell;
the length of the first swing rod is smaller than the distance from the first end of the first swing rod to the second end of the shell.
Preferably, the linkage mechanism further comprises a positioning rod;
a first end of the positioning rod is rotatably connected with the inner wall of the shell close to the central position, and a second end of the positioning rod is pivoted with a second end of the second oscillating rod so as to fixedly connect the linkage mechanism in the shell;
the first end of the positioning rod and the first end of the first swing rod are not on the same horizontal line and are not on the same vertical line, and the sum of the lengths of the second swing rod, the first connecting rod and the second connecting rod is smaller than the distance from the first end of the positioning rod to the first end of the shell, so that the flange is limited in the shell.
Preferably, the linkage mechanism further comprises a first connecting block and a second connecting block;
the inner side surface of the first connecting block is fixedly connected with the inner wall of the first side of the shell, and the outer side surface of the first connecting block is pivoted with the first end of the first swing rod;
the outer side surface of the second connecting block is fixedly connected with the inner wall of the second side of the shell, and the inner side surface of the second connecting block is pivoted with the second end of the second swing rod so as to fixedly connect the linkage mechanism with the shell.
Preferably, the linkage mechanism further comprises a bottom plate, the first end of the bottom plate is fixedly connected with the flange, and the second end of the bottom plate is pivoted with the second end of the second connecting rod so as to connect the connecting rod with the shell.
Preferably, the periphery wall of the end face contact of shell and baffle has a plurality of connection pieces, and a plurality of connection pieces use the center of shell as centre of a circle annular distribution on the periphery wall of shell, and the first end of connection piece links firmly with the periphery of shell, and the second end of connection piece extends to the central direction of keeping away from the shell, the terminal surface fixed connection of a plurality of connection pieces and baffle to with shell and baffle fixed connection.
Preferably, the end face of the second end of the shell is further provided with a groove, an opening of the groove faces the baffle, a first sealing element is embedded in the groove and abuts against the outer side face of the baffle, and therefore the shell and the baffle are sealed.
Preferably, the first seal is a rubber ring.
Compared with the prior art, the invention has the beneficial effects that: the utility model provides a double suction centrifugal pump, through the sealing device of design between impeller and baffle, when impeller and baffle produced axial relative displacement, through the length that automatically regulated connecting rod got into sealing device, realized the adjustment of sealed length between impeller and baffle, wherein, link gear has restricted the movable length of connecting rod, makes the connecting rod can not break away from the shell to the leakproofness between impeller and the baffle has been strengthened, and then the efficiency of improvement pump.
Drawings
Fig. 1 is a schematic structural view of a double-suction centrifugal pump according to an embodiment of the present invention;
FIG. 2 is an enlarged partial view of FIG. 1 at G;
FIG. 3 is an enlarged partial schematic view at H in FIG. 2;
fig. 4 is a partially enlarged view of K in fig. 2.
Description of reference numerals:
1-impeller, 11-flange, 12-connecting rod, 2-baffle, 3-sealing device, 31-shell, 310-connecting piece, 3101-threaded hole, 3102-bolt, 311-groove, 312-sealing piece, 32-linkage mechanism, 320-first swing rod, 321-second swing rod, 322-first connecting rod, 323-second connecting rod, 324-positioning rod, 325-first connecting block, 326-second connecting block and 327-bottom plate.
Detailed Description
In the following, an embodiment of the present invention will be described in detail with reference to the drawings, but it should be understood that the scope of the present invention is not limited by the embodiment.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the technical solutions of the present invention and simplifying the description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
As shown in fig. 1-4, fig. 1 is a schematic structural diagram of a double-suction centrifugal pump according to an embodiment of the present invention. Fig. 2 is an enlarged partial view of fig. 1 at G. Fig. 3 is a partially enlarged schematic view of fig. 2 at H. Fig. 4 is a partially enlarged view of K in fig. 2.
As shown in fig. 1-2, a double suction centrifugal pump includes: the impeller comprises an impeller 1 and a baffle 2, wherein the baffle 2 is covered on the impeller 1, and a sealing device 3 is arranged between the impeller 1 and the baffle 2;
one side of the impeller 1 is provided with a connecting rod 12, the end face of the connecting rod 12 close to the sealing device 3 is provided with a flange 11, the flange 11 extends towards the direction far away from the center of the impeller 1, and the flange 11 penetrates through the first end of the sealing device 3 and extends into the sealing device 3 so as to connect the connecting rod 12 and the first end of the sealing device 3 in a sealing manner;
the baffle 2 is fixedly connected with the outer peripheral wall of the sealing device 3;
wherein the sealing device 3 comprises: a housing 31 and a linkage 32;
the outer shell 31 is a sleeve body, the outer diameter of the flange 11 is equal to the inner diameter of the outer shell 31, the flange 11 penetrates into the first end of the outer shell 31, and the end face, close to the impeller 1, of the baffle plate 2 is fixedly connected with the outer peripheral wall of the outer shell 31 so as to connect the outer shell 31 and the baffle plate 2;
the linkage mechanism 32 is fixed inside the housing 31, and the linkage mechanism 32 restricts the flange 11 inside the housing 31 to connect and seal the connecting rod 12 and the housing 31 while pulling the flange 11 so as not to fall out of the housing 31.
As shown in fig. 3, the link mechanism 32 includes: a first swing link 320, a second swing link 321, a first connecting rod 322, and a second connecting rod 323;
the first end of the first swing link 320 is rotatably connected with the inner wall of the shell 31 close to the second end;
the first end of the second swing link 321 is pivotally connected to the second end of the first swing link 320;
a first end of the first link 322 is pivotally connected to a second end of the second swing link 321;
a first end of the second link 323 is pivotally connected to a second end of the first link 322;
a second end of the second link 323 is rotatably coupled to an inner wall of the flange 11 to couple the flange 11 with the housing 31;
wherein, the length of first pendulum rod 320 is less than the distance from the first end of first pendulum rod 320 to the second end of shell 31, when baffle 2 moves to the direction of keeping away from or being close to impeller 1, first pendulum rod 320 rotates to drive the swing of second pendulum rod 321, second pendulum rod 321 drives first connecting rod 322 and moves, and then drive second connecting rod 323 and move, second connecting rod 323 drives flange 11 and moves, drive impeller 1 and move promptly, thereby realized the adjustment of sealed length between impeller 1 and baffle 2, and then strengthened the leakproofness between impeller and the baffle, and then the efficiency of improvement pump.
Preferably, the linkage 32 further includes a positioning rod 324;
a first end of the positioning rod 324 is rotatably connected with the inner wall of the shell 31 close to the central position, and a second end of the positioning rod 324 is pivoted with a second end of the second swing rod 321, so that the linkage mechanism 32 is fixedly connected in the shell 31, and the stability of the linkage mechanism 32 is further enhanced;
the first end of the positioning rod 324 and the first end of the first swing link 320 are not on the same horizontal line and not on the same vertical line, and the sum of the lengths of the second swing link 321, the first link 322 and the second link 323 is smaller than the distance from the first end of the positioning rod 324 to the first end of the housing 31, so as to limit the flange 11 inside the housing 31.
Preferably, the linkage 32 further includes a first connecting block 325 and a second connecting block 326;
the inner side surface of the first connecting block 325 is fixedly connected with the inner wall of the first side of the shell 31, and the outer side surface of the first connecting block 325 is pivoted with the first end of the first swing rod 320;
the outer side surface of the second connecting block 326 is fixedly connected with the inner wall of the second side of the housing 31, and the inner side surface of the second connecting block 326 is pivotally connected with the second end of the second swing rod 321, so as to fixedly connect the linkage mechanism 32 with the housing 31.
Preferably, the linkage mechanism 32 further includes a bottom plate 327, a first end of the bottom plate 327 is fixedly connected to the flange 11, and a second end of the bottom plate 327 is pivotally connected to a second end of the second connecting rod 323, so as to connect the connecting rod 12 with the housing 31.
As shown in fig. 2 and 4, the outer peripheral wall of the outer shell 31 contacting the end surface of the baffle 2 is provided with a plurality of connecting pieces 310, the plurality of connecting pieces 310 are annularly distributed on the outer peripheral wall of the outer shell 31 with the center of the outer shell 31 as a center, a first end of each connecting piece 310 is fixedly connected with the outer periphery of the outer shell 31, a second end of each connecting piece 310 extends in a direction away from the center of the outer shell 31, the plurality of connecting pieces 310 are fixedly connected with the end surface of the baffle 2 to fixedly connect the outer shell 31 with the baffle 2, in this embodiment, the connecting pieces 310 and the baffle 2 are correspondingly provided with a plurality of threaded holes 3101, and bolts 3102 pass through the threaded holes which sequentially pass through the connecting pieces 310 and the baffle 2, so.
Preferably, the end face of the second end of the housing 31 further has a groove 311, an opening of the groove 311 faces the baffle 2, a first sealing member 312 is embedded in the groove 311, and the first sealing member 312 abuts against the outer side face of the baffle 2 to seal the housing 31 and the baffle 2, so as to further seal the housing 31 and the baffle 2.
Preferably, the first seal 312 is a rubber ring.
The use method and the working principle are as follows: when the baffle 2 moves in a direction away from or close to the impeller 1, the first swing rod 320 rotates to drive the second swing rod 321 to swing, the second swing rod 321 drives the first connecting rod 322 to move to drive the second connecting rod 323 to move, and the second connecting rod 323 drives the flange 11 to move, i.e., drives the impeller 1 to move, so that the sealing length between the impeller 1 and the baffle 2 is adjusted, the sealing performance between the impeller and the baffle is enhanced, and the efficiency of the pump is improved.
The above disclosure is only for the specific embodiments of the present invention, however, the embodiments of the present invention are not limited thereto, and any changes that can be considered by those skilled in the art should fall into the protection scope of the present invention.
Claims (8)
1. A double suction centrifugal pump comprising: the impeller comprises an impeller (1) and a baffle (2), wherein the baffle (2) is covered on the impeller (1), and the impeller is characterized in that a sealing device (3) is arranged between the impeller (1) and the baffle (2);
the impeller (1) is provided with a connecting rod (12) on one side, the end face of the connecting rod (12) close to the sealing device (3) is provided with a flange (11), the flange (11) extends towards the direction far away from the center of the impeller (1), and the flange (11) penetrates through the first end of the sealing device (3) and extends to the inside of the sealing device (3) so as to connect the connecting rod (12) and the first end of the sealing device (3) in a sealing mode;
the baffle (2) is fixedly connected with the outer peripheral wall of the sealing device (3);
wherein the sealing device (3) comprises: a housing (31) and a linkage mechanism (32);
the outer shell (31) is a sleeve body, the outer diameter of the flange (11) is equal to the inner diameter of the outer shell (31), the flange (11) penetrates into the first end of the outer shell (31), and the end face, close to the impeller (1), of the baffle plate (2) is fixedly connected with the outer peripheral wall of the outer shell (31) so as to connect the outer shell (31) with the baffle plate (2);
the linkage mechanism (32) is fixed inside the shell (31), and the linkage mechanism (32) limits the flange (11) inside the shell (31) so as to connect the connecting rod (12) and the shell (31).
2. The double suction centrifugal pump of claim 1, wherein the linkage mechanism (32) comprises: a first swing rod (320), a second swing rod (321), a first connecting rod (322) and a second connecting rod (323);
the first end of the first swing rod (320) is rotatably connected with the inner wall, close to the second end, of the shell (31);
the first end of the second swing rod (321) is pivoted with the second end of the first swing rod (320);
the first end of the first connecting rod (322) is pivoted with the second end of the second swing rod (321);
the first end of the second connecting rod (323) is pivoted with the second end of the first connecting rod (322);
a second end of the second connecting rod (323) is rotatably connected with the inner wall of the flange (11) to connect the flange (11) with the housing (31);
wherein the length of the first swing link (320) is less than the distance from the first end of the first swing link (320) to the second end of the housing (31).
3. The double-suction centrifugal pump of claim 2, wherein the linkage (32) further comprises a positioning rod (324);
the first end of the positioning rod (324) is rotatably connected with the inner wall of the shell (31) close to the central position, and the second end of the positioning rod (324) is pivoted with the second end of the second swing rod (321) so as to fixedly connect the linkage mechanism (32) in the shell (31);
the first end of the positioning rod (324) and the first end of the first swing rod (320) are not on the same horizontal line and not on the same vertical line, and the sum of the lengths of the second swing rod (321), the first connecting rod (322) and the second connecting rod (323) is smaller than the distance from the first end of the positioning rod (324) to the first end of the shell (31), so that the flange (11) is limited in the shell (31).
4. The double suction centrifugal pump of claim 3, wherein said linkage mechanism (32) further comprises a first connecting block (325) and a second connecting block (326);
the inner side surface of the first connecting block (325) is fixedly connected with the inner wall of the first side of the shell (31), and the outer side surface of the first connecting block (325) is pivoted with the first end of the first swing rod (320);
the outer side face of the second connecting block (326) is fixedly connected with the inner wall of the second side of the shell (31), and the inner side face of the second connecting block (326) is pivoted with the second end of the second swing rod (321) so as to fixedly connect the linkage mechanism (32) with the shell (31).
5. The double-suction centrifugal pump of claim 4, wherein the linkage mechanism (32) further comprises a bottom plate (327), a first end of the bottom plate (327) is fixedly connected with the flange (11), and a second end of the bottom plate (327) is pivotally connected with a second end of the second connecting rod (323) to connect the connecting rod (12) with the casing (31).
6. The double-suction centrifugal pump of claim 1 or 5, wherein the outer casing (31) has a plurality of connecting pieces (310) on the peripheral wall contacting with the end face of the baffle plate (2), the connecting pieces (310) are annularly distributed on the peripheral wall of the outer casing (31) with the center of the outer casing (31) as the center, the first ends of the connecting pieces (310) are fixedly connected with the periphery of the outer casing (31), the second ends of the connecting pieces (310) extend away from the center of the outer casing (31), and the connecting pieces (310) are fixedly connected with the end face of the baffle plate (2) to fixedly connect the outer casing (31) with the baffle plate (2).
7. The double suction centrifugal pump of claim 6, wherein the housing (31) further has a groove (311) on the end surface of the second end, the groove (311) opens toward the baffle (2), the groove (311) is embedded with a first sealing member (312), and the first sealing member (312) abuts on the outer side surface of the baffle (2) to seal the housing (31) and the baffle (2).
8. The double suction centrifugal pump of claim 7, wherein said first seal (312) is a rubber ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021174154.XU CN212508958U (en) | 2020-06-22 | 2020-06-22 | Double-suction centrifugal pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021174154.XU CN212508958U (en) | 2020-06-22 | 2020-06-22 | Double-suction centrifugal pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212508958U true CN212508958U (en) | 2021-02-09 |
Family
ID=74439342
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021174154.XU Expired - Fee Related CN212508958U (en) | 2020-06-22 | 2020-06-22 | Double-suction centrifugal pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212508958U (en) |
-
2020
- 2020-06-22 CN CN202021174154.XU patent/CN212508958U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210209 |