CN211116616U - Multistage tandem type slurry type canned motor pump - Google Patents
Multistage tandem type slurry type canned motor pump Download PDFInfo
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- CN211116616U CN211116616U CN201921901030.4U CN201921901030U CN211116616U CN 211116616 U CN211116616 U CN 211116616U CN 201921901030 U CN201921901030 U CN 201921901030U CN 211116616 U CN211116616 U CN 211116616U
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Abstract
A multistage serial slurry type canned motor pump belongs to the canned motor pump technical field, the canned motor pump comprises a suction port, a discharge port, a metering pump inlet, a heat exchanger, a circulating pipe, an impeller, an auxiliary impeller and the like, the two ends of the pump shaft are respectively provided with a first sliding bearing assembly and a second sliding bearing assembly, the end surface of one side of the second sliding bearing assembly facing the motor is provided with an auxiliary impeller, the upper end of the front bearing body is provided with a first radial hole, the lower end of the front bearing body is provided with a second radial hole, the upper end of the rear bearing body is provided with a third radial hole, the lower end of the rear bearing body is provided with a fourth radial hole, and the other end of the second circulating pipe is connected with an outlet of the heat exchanger, so that the particle medium is completely not in contact with the sliding bearing and a motor area, the phenomena of abrasion and blockage of the sliding bearing, scratch of a stator shielding sleeve and the like are avoided, and the sliding bearing assembly is cooled and lubricated.
Description
Technical Field
The utility model belongs to the technical field of the canned motor pump, specifically be a multistage serial-type mud type canned motor pump.
Background
The centrifugal pump without leakage can be divided into a magnetic driving centrifugal pump and a shield pump, and the centrifugal pump only has static seal and no dynamic seal in structure, so that one drop can be ensured to be leakage-free when liquid is conveyed. The conveying device is suitable for conveying corrosive, flammable and explosive liquid, extremely toxic liquid, radioactive liquid and extremely valuable liquid; meanwhile, the device is suitable for conveying high-pressure, high-temperature, low-temperature, high-melting-point and other liquids. With the increasing requirement of environmental protection, the canned motor pump is widely applied in the departments of national defense, chemical industry, petroleum and the like.
Multistage canned motor pump is applicable to the high-lift operating mode, but general multistage canned motor pump can only accomplish 7 grades and can't satisfy the operating mode of higher lift. Because the longer the pump cantilever, the greater the radial force the pump shaft is subjected to as the number of stages of the impeller increases. Radial forces are alternating loads for a rotating shaft, which can cause fatigue failure of the shaft and increase the risk of pump shaft fatigue failure. The size of the radial force directly influences the working stability of the pump shaft, and the overlarge radial force causes the pump to vibrate during operation, generate large noise and quickly wear a bearing, thereby seriously influencing the service life of the pump.
When delivering non-clean media such as flocculent media with particles with the diameter of 0.01mm-2mm, the common shield pump can not meet the delivery requirement. Leakage can occur because the particulate media can scratch the pump body, impeller, and even stator shields. The medium particles easily block the silicon carbide sliding bearing to influence the self-lubricating property of the silicon carbide sliding bearing or wear the sliding bearing due to the harder particles to cause the damage of the sliding bearing. In addition, the medium particles are easy to block a circulation passage to influence the circulation flow of the motor, thereby causing the bad conditions of heating of the motor and the like.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides a multistage serial-type mud type canned motor pump, this kind of multistage serial-type canned motor pump can accomplish 12 grades at most for the operating mode of reply higher lift and multistage serial-type design have very high efficiency when low flow high lift. On the basis, the metering pump, the heat exchanger and other components are added, so that the particle medium is completely not contacted with the sliding bearing and the motor area, the phenomena of abrasion and blockage of the sliding bearing, scratch of a stator shielding sleeve and the like are avoided, and the sliding bearing assembly is cooled and lubricated.
The utility model adopts the following technical scheme:
a multistage tandem slurry type canned motor pump comprises a suction port, a discharge port, a metering pump inlet, a heat exchanger, a first circulating pipe, a second circulating pipe, a third circulating pipe, an impeller, a front bearing body, an auxiliary impeller, a rear bearing body, a first sliding bearing assembly, a second sliding bearing assembly, a pump shaft and a motor, wherein a first chamber, a second chamber, a third chamber, a fourth chamber and a fifth chamber are sequentially arranged from the suction port to the discharge port, the first sliding bearing assembly and the second sliding bearing assembly are respectively arranged at two ends of the pump shaft, the auxiliary impeller is arranged on one side end face, facing the motor, of the second sliding bearing assembly, a first radial hole is formed in the upper end of the front bearing body, a second radial hole is formed in the lower end of the front bearing body, the second chamber is communicated with the first circulating pipe through the first hole, the first chamber is communicated with the third circulating pipe through the second hole, the other end of the first circulating pipe is connected with an inlet of the heat exchanger, a third hole with a radial hole is formed in the upper end of the rear bearing body, a fourth hole with a radial hole is formed in the lower end of the rear bearing body, the second circulating pipe is communicated with a fourth cavity through the third hole, a fifth cavity is communicated with a third circulating pipe through the fourth hole, and the other end of the second circulating pipe is connected with an outlet of the heat exchanger.
Further, the first plain bearing assembly cooperates with a front bearing body and the second plain bearing assembly cooperates with a rear bearing body.
Further, the auxiliary impeller is disposed between the first plain bearing assembly and the second plain bearing assembly and abuts against a left end face of the second plain bearing assembly.
Further, the third circulating pipe is communicated with the first chamber and the fifth chamber, the first circulating pipe is communicated with the second chamber and the heat exchanger, and the second circulating pipe is communicated with the fourth chamber and the heat exchanger.
Furthermore, the canned motor pump has twelve-stage impellers, and six impellers are respectively arranged at the left end and the right end of the pump shaft.
The multistage tandem design is that 12 stages of impellers are uniformly distributed at two ends of a shaft, so that radial load distribution is more uniform, and the bearing capacity of the bearing is enhanced. This utility model discloses will be required three to four sets of sliding bearing assembly reduction to two sets in the past unilateral 12 level impellers, not only reduce the degree of difficulty of a plurality of slide bearing axialities, still reduce cost. In addition, a metering pump, a heat exchanger and other parts are additionally arranged, the pump is divided into two different independent circulations by the supply pressure of the metering pump, the particle-containing medium flows through a main circulation passage, and the cleaning medium flows through a second circulation passage.
The utility model discloses an advantage and effect do:
(1) generally multistage canned motor pump can only accomplish 7 grades, and the utility model discloses possible 12 grades are suitable for the operating mode of higher lift.
(2) This utility model discloses will be required three to four sets of sliding bearing assembly reduction to two sets in the past unilateral 12 level impellers, not only reduce the degree of difficulty of a plurality of slide bearing axialities, still reduce cost.
Drawings
Fig. 1 is a schematic structural view of the multistage tandem slurry type canned motor pump of the present invention.
The components in the figure: 1 is a suction port, 2 is a discharge port, 3 is a metering pump inlet, 4 is a heat exchanger, 5 is a first circulation pipe, 6 is a second circulation pipe, 7 is a third circulation pipe, 8 is an impeller, 9 is a front bearing body, 10 is an auxiliary impeller, 11 is a rear bearing body, 12 is a first sliding bearing assembly, 13 is a second sliding bearing assembly, 14 is a pump shaft, 15 is a first chamber, 16 is a second chamber, 17 is a third chamber, 18 is a fourth chamber, 19 is a fifth chamber, 20 is a first hole, 21 is a second hole, 22 is a third hole, 23 is a fourth hole, and 24 is a motor gap.
Detailed Description
The novel product is described in detail below with reference to the attached drawings.
The first sliding bearing assembly 12 and the second sliding bearing assembly 13 are respectively arranged at two ends of a pump shaft 14 of the shaft, the first sliding bearing assembly 12 is matched with the front bearing body 9, the second sliding bearing assembly 13 is matched with the rear bearing body 11, and the sliding bearing assembly structure is the prior art. The auxiliary impeller 10 is placed intermediate the first plain bearing assembly 12 and the second plain bearing assembly 13 and abuts against the left end face of the second plain bearing assembly 13. A first hole 20 with a radial hole is formed in the upper end of the front bearing body 9, a second hole 21 with a radial hole is formed in the lower end of the front bearing body, the first hole 20 is communicated with the second chamber 16 and the first circulating pipe 5, the second hole 21 is communicated with the first chamber 15 and the third circulating pipe 7, and the other end of the first circulating pipe 5 is connected with an inlet of the heat exchanger 4. The upper end of the rear bearing body 11 is provided with a third hole 22 with a radial hole, the lower end of the rear bearing body is provided with a fourth hole 23 with a radial hole, the third hole 22 is communicated with the second circulating pipe 6 and the fourth cavity 18, the fourth hole 23 is communicated with the fifth cavity 19 and the third circulating pipe 7, and the other end of the second circulating pipe 6 is connected with an outlet of the heat exchanger 4.
The utility model discloses a per six impellers distribute respectively in 12 grades of impellers at the left end and the right-hand member of pump shaft 14. The pump has two circulation paths under the pressure action of the metering pump. A main circulation path: the medium containing particles enters the pump through the suction port 1, is pressurized by six impellers at the left end, enters the third circulating pipe 7 through the second hole 21, passes through the fourth hole 23, is pressurized by six impellers at the right end, and flows out from the discharge port 2. A second circulation path: to ensure that particulate media does not enter the first and second plain bearing assemblies 12, 13 and the motor gap 24 causing clogging and wear, metering pumps are required to pressurize. The metering pump is filled with cleaning medium, the cleaning medium enters the outlet pipe orifice 6 of the heat exchanger 4 through the inlet 3 of the metering pump and then enters the fourth chamber 18 through the third hole 22, a part of the cleaning medium in the chamber enters the fifth chamber 19 through the gap of the second sliding bearing assembly 13 to converge with the granular medium, and the granular medium entering from the fourth hole 23 cannot enter the second sliding bearing assembly 13 to cause blockage. Another part of the cleaning medium is pressurized again by the auxiliary impeller 10, enters the third chamber 17, enters the second chamber 16 through the motor gap 24, and most of the cleaning medium in the part enters the heat exchanger 4 through the first hole 20 and enters the inlet pipeline of the heat exchanger 4 through the first circulating pipe 5 for heat exchange. A small portion of the cleaning medium enters the first chamber 15 through the apertures of the first plain bearing assembly 12 to merge with the particulate medium and ensure that the particulate medium in the first chamber 15 does not enter the first plain bearing assembly 12. The cleaning medium for heat exchange has the functions of lubricating and cooling the two sliding bearing assemblies, and the temperature of the motor assembly is reduced so that the motor assembly is not burnt due to overhigh temperature.
Claims (5)
1. A multistage serial connection type slurry type canned motor pump is characterized by comprising a suction port (1), a discharge port (2), a metering pump inlet (3), a heat exchanger (4), a first circulating pipe (5), a second circulating pipe (6), a third circulating pipe (7), an impeller (8), a front bearing body (9), an auxiliary impeller (10), a rear bearing body (11), a first sliding bearing assembly (12), a second sliding bearing assembly (13), a pump shaft (14) and a motor, wherein a first cavity (15), a second cavity (16), a third cavity (17), a fourth cavity (18) and a fifth cavity (19) are sequentially arranged from the suction port (1) to the discharge port (2), the two ends of the pump shaft (14) are respectively provided with the first sliding bearing assembly (12) and the second sliding bearing assembly (13), and the end face of one side, facing the motor, of the second sliding bearing assembly (13) is provided with the auxiliary impeller (10), the upper end of the front bearing body (9) is provided with a first radial hole (20), the lower end of the front bearing body is provided with a second radial hole (21), the second cavity (16) is communicated with the first circulating pipe (5) through the first hole (20), the first cavity (15) is communicated with the third circulating pipe (7) through the second hole (21), the other end of the first circulating pipe (5) is connected with an inlet of the heat exchanger (4), the upper end of the rear bearing body (11) is provided with a third radial hole (22), the lower end of the rear bearing body is provided with a fourth radial hole (23), the second circulating pipe (6) is communicated with the fourth cavity (18) through the third hole (22), the fifth cavity (19) is communicated with the third circulating pipe (7) through the fourth hole (23), and the other end of the second circulating pipe (6) is connected with an outlet of the heat exchanger (4).
2. A multistage tandem slurry type canned pump according to claim 1, wherein the first plain bearing assembly (12) is fitted with the front bearing body (9) and the second plain bearing assembly (13) is fitted with the rear bearing body (11).
3. A multistage tandem slurry type canned pump according to claim 1, wherein the auxiliary impeller (10) is interposed between the first plain bearing assembly (12) and the second plain bearing assembly (13) and abuts against the left end face of the second plain bearing assembly (13).
4. The multistage tandem slurry type canned motor pump according to claim 1, wherein the third circulation pipe (7) communicates with the first chamber (15) and the fifth chamber (19), the first circulation pipe (5) communicates with the second chamber (16) and the heat exchanger (4), and the second circulation pipe (6) communicates with the fourth chamber (18) and the heat exchanger (4).
5. The multistage tandem slurry type canned pump according to claim 1, wherein the canned pump has twelve stages of impellers, and six impellers are arranged at the left and right ends of the pump shaft (14), respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921901030.4U CN211116616U (en) | 2019-11-06 | 2019-11-06 | Multistage tandem type slurry type canned motor pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921901030.4U CN211116616U (en) | 2019-11-06 | 2019-11-06 | Multistage tandem type slurry type canned motor pump |
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| Publication Number | Publication Date |
|---|---|
| CN211116616U true CN211116616U (en) | 2020-07-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921901030.4U Active CN211116616U (en) | 2019-11-06 | 2019-11-06 | Multistage tandem type slurry type canned motor pump |
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| CN (1) | CN211116616U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111810439A (en) * | 2020-08-18 | 2020-10-23 | 大连海密梯克泵业有限公司 | Anti-dead-bearing structure of serial multistage pump sliding bearing and multistage canned motor pump |
| CN111927787A (en) * | 2020-08-18 | 2020-11-13 | 大连海密梯克泵业有限公司 | Multistage canned motor pump with inner loop hole |
-
2019
- 2019-11-06 CN CN201921901030.4U patent/CN211116616U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111810439A (en) * | 2020-08-18 | 2020-10-23 | 大连海密梯克泵业有限公司 | Anti-dead-bearing structure of serial multistage pump sliding bearing and multistage canned motor pump |
| CN111927787A (en) * | 2020-08-18 | 2020-11-13 | 大连海密梯克泵业有限公司 | Multistage canned motor pump with inner loop hole |
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