CN212106295U - Submerged double-suction pump - Google Patents
Submerged double-suction pump Download PDFInfo
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- CN212106295U CN212106295U CN202020844751.2U CN202020844751U CN212106295U CN 212106295 U CN212106295 U CN 212106295U CN 202020844751 U CN202020844751 U CN 202020844751U CN 212106295 U CN212106295 U CN 212106295U
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- double suction
- suction pump
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- 239000007788 liquid Substances 0.000 claims abstract description 74
- 230000007246 mechanism Effects 0.000 claims abstract description 18
- 230000005540 biological transmission Effects 0.000 claims description 15
- 238000007789 sealing Methods 0.000 claims description 8
- 238000004891 communication Methods 0.000 claims description 4
- 239000012530 fluid Substances 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 238000013461 design Methods 0.000 abstract description 3
- 238000012423 maintenance Methods 0.000 abstract description 3
- 238000012545 processing Methods 0.000 abstract description 3
- 238000005096 rolling process Methods 0.000 description 10
- 230000000694 effects Effects 0.000 description 7
- 238000005086 pumping Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 210000001503 joint Anatomy 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 150000004673 fluoride salts Chemical class 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 150000002823 nitrates Chemical class 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
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Abstract
The utility model provides a double suction pump under liquid, relate to the submerged pump field, establish the stay tube outside the pump shaft including pump shaft and cover, the shutoff of sealed lid is passed through to stay tube one end, the pump shaft end passes sealed lid cooperation and has the double suction pump body, double suction pump body hoop intercommunication has the honeycomb duct, the honeycomb duct is kept away from inside the one end intercommunication stay tube of the double suction pump body, the pump shaft passes through drive mechanism and acquires power from the outside, thereby drive the work of the inside double suction impeller of the double suction pump body, be used for the liquid that will inhale the double suction pump body through the honeycomb duct export in the stay tube and then discharge to the outside, set up the pump body into the upper pump body, well pump body and lower pump body, through the honeycomb duct. The whole design is novel, the structure is compact, the processing and the manufacturing are convenient, the disassembly and the maintenance are convenient, and the manufacturing cost is low.
Description
Technical Field
The disclosure relates to the field of submerged pumps, in particular to a submerged double-suction pump.
Background
The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art.
Submerged pumps are a class that is widely used in pump applications. Submerged pumps are divided into single-tube type and double-tube type. Because the impeller of submerged pump soaks in the middle of liquid, need not evacuation or fill the diversion when the pump starts, as long as the impeller submerges in liquid, the start can, convenient to use is reliable.
The inventor finds that the impeller of the single-tube type submerged pump is mostly of a single-stage single-suction structure or a multi-stage single-suction structure, and the axial force is large; the axial force generated by the submerged pump is borne by a rolling bearing of the transmission mechanism, so that the failure rate of the rolling bearing of the single-stage single-suction or multi-stage single-suction submerged pump is high; in addition, the pump body structure of the submerged double-suction pump in the prior art is complex, the manufacturing cost is high, and the submerged double-suction pump is inconvenient to install and maintain.
SUMMERY OF THE UTILITY MODEL
The utility model aims at the deficiencies that prior art exists, provide a novel submerged double entry pump, set up the pump body into the upper pump body, well pump body and lower pump body, through the honeycomb duct with the indoor liquid drainage of pressurized water to the stay tube in. The whole design is novel, the structure is compact, the processing and the manufacturing are convenient, the disassembly and the maintenance are convenient, and the manufacturing cost is low.
In order to realize the purpose, the following technical scheme is adopted:
the utility model provides a two suction pump under liquid, establish the stay tube outside the pump shaft including pump shaft and cover, sealed lid shutoff is passed through to stay tube one end, the pump shaft end passes sealed lid cooperation and has the double suction pump body, double suction pump body hoop intercommunication has the honeycomb duct, the one end intercommunication stay tube that the double suction pump body was kept away from to the honeycomb duct is inside, pump shaft upper portion is equipped with drive mechanism, drive mechanism drives the work of the inside double suction impeller of the double suction pump body through the pump shaft under the power effect, a liquid that will inhale the double suction impeller changes high-pressure liquid into, and export in the stay tube through the honeycomb duct, the rethread drain.
Furthermore, a plurality of flow guide pipes are arranged at intervals along the annular direction of the double-suction pump body; the total area of the flow guide pipe is equal to the flow area of the supporting pipe.
Furthermore, one end of each of the plurality of flow guide pipes is communicated with the inner cavity of the double-suction pump body, and the other end of each of the plurality of flow guide pipes is connected with the supporting pipe and communicated with the inside of the supporting pipe.
Furthermore, a cavity is arranged inside the double-suction pump body, the pump shaft penetrates through the cavity, a first liquid inlet is formed in the upper portion of the cavity at intervals along the radial direction of the pump shaft, a second liquid inlet is formed in the bottom of the cavity, and the cavity is used for receiving liquid entering from the first liquid inlet and the second liquid inlet and outputting the liquid converted into high pressure through the flow guide pipe.
Further, an impeller is matched on the pump shaft and is positioned between the first liquid inlet and the second liquid inlet; the impeller is a double-suction impeller.
Furthermore, the first liquid inlet comprises a plurality of strip-shaped grooves communicated with the cavity and is uniformly arranged in the circumferential direction relative to the pump shaft, the second liquid inlet is a reducing channel to form a horn-shaped structure, and the second liquid inlet is arranged along the axial direction of the pump shaft; said
Furthermore, guide vanes are arranged inside the butt joint and communication position of the flow guide pipe and the double-suction pump body and used for guiding liquid flowing out of the double-suction impeller at a high speed.
Furthermore, the double-suction pump body comprises an upper pump body, a middle pump body and a lower pump body which are sequentially connected, a rib plate is arranged in the lower pump body, and a rib plate is arranged on the outer wall of the upper pump body.
Further, the pump shaft overcoat is equipped with the bearing, the pump shaft passes through the bearing and cooperates with sealed lid and double suction pump body respectively, the bearing be slide bearing.
Furthermore, the transmission mechanism and the support tube are coaxially arranged, a liquid outlet tube is connected to the side wall of the support tube, and the support tube is used for receiving liquid discharged by the flow guide tube and outputting the liquid to the outside through the liquid outlet tube.
Compared with the prior art, the utility model has the advantages and positive effects that:
(1) the liquid is conveyed into the supporting pipe by utilizing the plurality of flow guide pipes on the side surface of the middle pump body, the total area of the flow guide pipes is equal to the flow passing area of the supporting pipe, the uniform change of the flow velocity of the high-pressure liquid flowing out of the middle pump body is ensured, the hydraulic loss is reduced, and the hydraulic efficiency is improved; the inner cavity of the middle pump body is provided with the guide vane, the radial force of the rotor is reduced by the guide vane, and the effect of prolonging the service life of the sliding bearing and the rolling bearing is achieved.
(2) The whole design of the submerged double-suction pump is novel, the upper part, the middle part and the lower part of the pump body are connected to form a double-suction pump body, the structure is compact, the processing and the manufacture are convenient, and the disassembly and the maintenance are more convenient.
(3) Go up the pump body middle part and be equipped with first inlet, be equipped with the second inlet with the lower pump body, the liquid velocity of flow at double suction impeller both ends is close to guaranteed the feed liquor effect at impeller both ends, the impeller atress is even, and impeller both ends axial force equals, but opposite direction, and the axial force that acts on the impeller is zero theoretically. The rolling bearing of the transmission mechanism only bears the weight of the rotor, so that the whole machine can run more stably, and meanwhile, the service life of the rolling bearing is prolonged.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure and are not to limit the disclosure.
Fig. 1 is a schematic view of the overall structure of a submerged double suction pump in embodiment 1 of the present disclosure;
fig. 2 is a schematic structural diagram of the double suction pump body and the support tube in cooperation in embodiment 1 of the present disclosure.
In the figure, 1, a pump shaft, 2, a flow guide pipe, 3, an upper pump body, 4, a set screw, 5, a sealing ring, 6, a key, 7, a retaining sleeve, 8, a lower shaft sleeve, 9, a lower sliding bearing, 10, a supporting pipe, 11, an upper sliding bearing, 12, an upper shaft sleeve, 13, a middle pump body, 14, an impeller, 15, a lower pump body, 16, a key, 17, a round nut, 18, a liquid outlet pipe, 19, a transmission mechanism, 20, a first liquid inlet, 21, a second liquid inlet, 22 and a guide vane.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present disclosure. As used herein, the singular forms "a", "an", and/or "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof;
for convenience of description, the words "up", "down", "left" and "right" in this disclosure, if any, merely indicate that the directions of movement are consistent with those of the figures themselves, and are not limiting in structure, but merely facilitate the description of the invention and simplify the description, rather than indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present disclosure.
As described in the background art, the pump body of the submerged double suction pump in the prior art has a complicated structure, is relatively expensive to manufacture, and is inconvenient to install and maintain. In view of the above, the present disclosure provides a submerged double suction pump.
Example 1
In an exemplary embodiment of the present disclosure, as shown in fig. 1-2, a submerged double suction pump is provided; the double-suction pump mainly comprises a transmission mechanism 19, a double-suction pump body, a pump shaft 1 and a support pipe 10, wherein a motor drives the pump shaft to rotate through the transmission mechanism, the pump shaft is matched with an impeller in the double-suction pump body, the motor drives the impeller to work through the pump shaft, the support pipe 10 is sleeved outside the pump shaft 1, the upper end of the support pipe is connected with the transmission mechanism, the lower end of the support pipe is connected with the double-suction pump body, two ends of the double-suction pump body extract liquid and convey the liquid to the support pipe 10 through a guide pipe 2, and.
For the pump shaft and the supporting tube, in the embodiment, the supporting tube is sleeved outside the pump shaft, the upper end of the supporting tube is connected with the transmission mechanism, and the lower end of the supporting tube is connected with the double-suction pump body, so that the fixing effect on the double-suction pump body can be realized;
in actual operation, the double-suction pump body inputs liquid into the bottom end of the supporting tube through the guide tube, and the liquid is discharged upwards along the supporting tube to the liquid outlet tube under the action of pressure.
One end of the supporting tube, which is butted with the double-suction pump body, is matched with a sealing cover, and a pump shaft penetrates through the sealing cover and then is matched with the double-suction impeller to drive the double-suction impeller to work; the sealing cover is utilized to realize the partition of the cavity of the pump body and the supporting pipe, the liquid inlet effect above and below the impeller is ensured, and the guide pipe on the side surface of the pump body is utilized to convey liquid into the supporting pipe;
for the double-suction pump body, in the embodiment, the double-suction pump body comprises an upper pump body, a middle pump body and a lower pump body which are sequentially connected, a cavity is formed by the upper pump body, the middle pump body and the lower pump body, the pump shaft is matched with an upper shaft sleeve through a set screw 4, the pump shaft is matched with a sealing cover through an upper shaft sleeve 12 and an upper sliding bearing 11, a key groove is formed in the pump shaft, a key 6 is matched in the key groove, at the position, an impeller 14 and the pump shaft realize matched transmission, the position of the impeller on the pump shaft is restrained through a retaining sleeve 7 and a lower shaft sleeve 8 and matched with two round nuts, the pump shaft is matched with the lower; the tail end of the pump shaft is matched with the lower sliding bearing through a lower shaft sleeve;
the upper pump body is fixed at the lower end of the supporting tube, the middle pump body is fixed on the upper pump body, the lower pump body is fixed on the middle pump body, a plurality of flow guide pipes are annularly arranged in the cavity, one end of each flow guide pipe is communicated with the cavity, and the other end of each flow guide pipe is communicated with the inside of the supporting tube; the total area of the plurality of flow guide pipes is equal to the flow passing area of the support pipe, so that the uniform change of the flow velocity of the high-pressure liquid flowing out of the middle pump body is ensured, the hydraulic loss is reduced, and the hydraulic efficiency is improved; the inner cavity of the middle pump body is provided with the guide vane, the radial force of the rotor is reduced by the guide vane, and the effect of prolonging the service life of the sliding bearing and the rolling bearing is achieved.
The pump shaft sequentially penetrates through the sealing cover, the upper pump body 3, the middle pump body 13 and the lower pump body 15, and the sealing ring 5 is arranged at the position where the pump shaft is in running fit with other elements;
the sliding bearing plays a role in radial support, so that the stability of pump shaft transmission can be improved, and the stable operation of equipment is ensured.
It should be noted that the cavity is provided with a first liquid inlet 20 and a second liquid inlet 21 at intervals along the radial direction of the pump shaft, and the cavity receives liquid entering from the first liquid inlet and the second liquid inlet and outputs the liquid through the flow guide pipe; the impeller is positioned between the first liquid inlet and the second liquid inlet;
the liquid inlets are respectively arranged above and below the impeller, and liquid is conveyed into the cavity corresponding to the impeller simultaneously, so that the axial force generated by the liquid inlets on the two sides to the impeller can be completely offset, the axial load of the rolling bearing is reduced, the abrasion is reduced, and the service life is prolonged.
In this embodiment, the cavity structure is a structure formed by two horn-shaped water suction chambers in butt joint, the part corresponding to the middle pump body is a water pumping chamber, the water pumping chamber is of an annular structure, and the annular structure is provided with liquid outlet holes corresponding to the flow guide pipe; the impeller is a double-suction impeller which is fixed at the lower end of the pump shaft through a round nut 17; and the hydraulic efficiency is improved by matching with the double-suction impeller.
It can be understood that, in order to improve the strength of the double suction pump body, the outer portion of the upper pump body is provided with a plurality of rib plates.
The transmission mechanism has the function of transmitting the power of the motor to the pump shaft, and drives the impeller to rotate through the pump shaft to apply work to the liquid, so that energy conversion is realized, and the liquid is discharged outwards.
As for the flow guide pipes, in the embodiment, a plurality of flow guide pipes are arranged at intervals along the circumferential direction of the double-suction pump body; one end of each of the flow guide pipes is communicated with the inner cavity of the double-suction pump body, and the other end of each of the flow guide pipes is connected with the supporting pipe and communicated with the inside of the supporting pipe;
the honeycomb duct drains the liquid output by the double-suction pump body into the supporting tube, the supporting tube can be used as a conveying pipeline, one end of the supporting tube is communicated with the double-suction pump body to receive the liquid, and the other end of the supporting tube is communicated with the external structure to output the liquid.
In this embodiment, the number of the flow guide pipes is four, and as shown in fig. 2, the flow guide pipes are arranged in pairs and are uniformly distributed in the circumferential direction of the support pipe.
It should be noted that the guide vane 22 is arranged at the butt joint and communication position of the guide pipe and the double-suction pump body, and is used for guiding the liquid entering the guide pipe from the double-suction pump body;
the guide vane is utilized to reduce the radial force in the cavity, the radial force applied to the pump shaft is reduced, and the effect of prolonging the service life of the bearing is achieved.
In addition, in other embodiments, a cooling cavity may be disposed on the double-suction pump, and when pumping high-temperature media, such as high-temperature molten nitrate salt, fluoride salt, or heat transfer oil, the cooling cavity of the transmission mechanism is connected with external cooling water, so as to transfer working heat in time, so that the rolling bearing and the motor in the transmission mechanism can operate at safe temperature, and ensure safe and reliable operation of the equipment;
when the pumping medium is a high-temperature medium, the transmission mechanism can be provided with a cooling fan to cool the rolling bearing, so that the rolling bearing and the motor can operate at a safe temperature, and the safe and reliable operation of the equipment is ensured.
The above description is only a preferred embodiment of the present disclosure and is not intended to limit the present disclosure, and various modifications and changes may be made to the present disclosure by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present disclosure should be included in the protection scope of the present disclosure.
Claims (10)
1. The utility model provides a two suction pump under liquid, a serial communication port, establish the stay tube outside the pump shaft including pump shaft and cover, stay tube one end is through sealed lid shutoff, the pump shaft end passes sealed lid cooperation and has the double suction pump body, double suction pump body hoop intercommunication has the honeycomb duct, the honeycomb duct is kept away from the one end intercommunication stay tube of the double suction pump body inside, the pump shaft is located the one end cooperation of stay tube and has drive mechanism, drive mechanism acquires power from the motor and drives the work of double suction impeller through the pump shaft for the liquid that will inhale the double suction pump body passes through the honeycomb duct and exports the back in the stay tube.
2. The submerged double suction pump according to claim 1, wherein the plurality of the flow guide pipes are circumferentially spaced along the double suction pump body; the total area of the plurality of flow guide pipes is equal to the flow area of the support pipe.
3. The submerged double suction pump according to claim 2, wherein the plurality of fluid guide pipes are connected to the inner chamber of the double suction pump body at one end and to the support pipe at the other end, respectively, and are communicated with the inside of the support pipe.
4. The submerged double suction pump according to claim 1, characterized in that the double suction pump body has a cavity inside, through which the pump shaft passes; the cavity is provided with a first liquid inlet and a second liquid inlet at intervals along the radial direction of the pump shaft, and is used for receiving liquid entering from the first liquid inlet and the second liquid inlet and outputting the liquid through the flow guide pipe.
5. The submerged double suction pump of claim 4, wherein an impeller is fitted on the pump shaft, the impeller being located between the first liquid inlet and the second liquid inlet; the impeller is a double-suction impeller.
6. The submerged double suction pump according to claim 4 or 5, wherein the first liquid inlet comprises a plurality of strip-shaped grooves communicated with the cavity and uniformly arranged in the circumferential direction of the pump shaft, the second liquid inlet is a reducing channel to form a horn-shaped structure, and the second liquid inlet is axially arranged along the pump shaft.
7. The submerged double suction pump according to claim 1, wherein a guide vane is provided at a position where the flow guide pipe is in abutting communication with the double suction pump body, for guiding the liquid discharged from the double suction impeller into the flow guide pipe.
8. The submerged double suction pump according to claim 1, wherein the double suction pump body comprises an upper pump body, a middle pump body and a lower pump body which are connected in sequence, and a rib plate is arranged in the lower pump body; the outer part of the upper pump body is provided with a rib plate.
9. The submerged double suction pump according to claim 1, characterized in that the pump shaft is externally sleeved with a bearing, the pump shaft is respectively engaged with the sealing cover and the double suction pump body through the bearing, and the bearing is a sliding bearing.
10. The submerged double suction pump according to claim 1, characterized in that the transmission mechanism, the support tube and the double suction pump body are coaxially arranged, a liquid outlet pipe is connected to the side wall of the support tube, and the support tube is used for receiving the liquid discharged by the flow guide pipe and outputting the liquid to the outside through the liquid outlet pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020844751.2U CN212106295U (en) | 2020-05-19 | 2020-05-19 | Submerged double-suction pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020844751.2U CN212106295U (en) | 2020-05-19 | 2020-05-19 | Submerged double-suction pump |
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| Publication Number | Publication Date |
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| CN212106295U true CN212106295U (en) | 2020-12-08 |
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| CN202020844751.2U Active CN212106295U (en) | 2020-05-19 | 2020-05-19 | Submerged double-suction pump |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116624435A (en) * | 2023-04-18 | 2023-08-22 | 烟台龙港泵业股份有限公司 | Back flushing central liquid outlet submerged pump and vertical cylinder bag pump |
-
2020
- 2020-05-19 CN CN202020844751.2U patent/CN212106295U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116624435A (en) * | 2023-04-18 | 2023-08-22 | 烟台龙港泵业股份有限公司 | Back flushing central liquid outlet submerged pump and vertical cylinder bag pump |
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