CN202937458U - Cylinder bag multistage direct connection installation centrifugal pump - Google Patents
Cylinder bag multistage direct connection installation centrifugal pump Download PDFInfo
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- CN202937458U CN202937458U CN 201220642552 CN201220642552U CN202937458U CN 202937458 U CN202937458 U CN 202937458U CN 201220642552 CN201220642552 CN 201220642552 CN 201220642552 U CN201220642552 U CN 201220642552U CN 202937458 U CN202937458 U CN 202937458U
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- pump
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- cylinder bag
- pump shaft
- multistage direct
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Abstract
The utility model discloses a cylinder bag multistage direct connection installation centrifugal pump which comprises a pump shaft, a suction section, a pump feed section, a connecting pipe section and a pump discharge section, wherein the suction section, the pump feed section, the connecting pipe section and the pump discharge section are communicated in sequence. The pump shaft is arranged in the suction section, the pump feed section and the connecting pipe section, wherein the pump shaft located at a suction end in the suction section is provided with a primary stage impeller component which comprises two adjacent primary impellers arranged in a staggered mode. The cylinder bag multistage direct connection installation centrifugal pump is simple and compact in structure, and capable of preventing cavitation of the impellers. The two primary stage impellers are arranged in a staggered mode, the axial force generated by the two impellers is opposite and can be mutually offset, and the self-generated axial force can be balanced.
Description
Technical field
The utility model relates to the centrifugal pump field, refers in particular to a kind ofly to increase the multistage direct connection of stressed cylinder bag to the oil pipeline pump centrifugal pump is installed.
Background technique
Multistage centrifugal pump is widely used in the fields such as oil, chemical industry, smelting, printing and dyeing, electric power.Can produce huge axial force during the multistage centrifugal pump work, this axial force has affected the bearing of pump shaft and the working life of mechanical seal greatly.
At present, multistage centrifugal pump mainly solves balancing axial thrust by following several method: (1) arranges Balance disc or balancing drum; (2) adopt double-sided impeller.
During the work of balance dish, because Balance disc is not easy to be washed open by liquid, tend to the gimbal that rubs, pump shaft power is increased suddenly.During the work of balance drum, balancing drum easily rubs with other parts, the situation of locking occurs.So these two kinds of equilibrium forms easily break down, poor reliability.
When adopting the double-sided impeller balancing axial thrust, require pump that outer flow passage is set and be communicated with the pump housing, this will cause the flow passage resistance force of waterproof of pump to increase, and cause the working efficiency of pump to reduce.
In addition, when multistage centrifugal pump turns round, to the hold-up vapor tension, will cause the partially liq vaporization due near the pressure decreased at some local depressions place liquid-inlet, produce cavitation.Often diminish because the impeller cavitation makes pump duty, lift descends, and cutout even occurs, thereby can not really improve stable pressure for the oil pipeline pump.
The model utility content
The technical problems to be solved in the utility model just is: for the technical problem that prior art exists, provide a kind of simple and compact for structure, can the Equilibrium axial force, effectively prevent that the multistage direct connection of cylinder bag that impeller produces cavitation from installing centrifugal pump.
For solving the problems of the technologies described above, the technological scheme that the utility model proposes is:
The multistage direct connection of a kind of bag of the present utility model is installed centrifugal pump, comprise pump shaft and the suction casing that is connected successively, pump segment, connection pipeline section and the section of pumping, described pump shaft is installed on suction casing, pump segment and connection pipeline section and is connected, the described pump shaft that is arranged in place, suction casing suction side is provided with the first stage impeller assembly, described first stage impeller assembly comprise two adjacent and be the staggered first stage impeller of arranging.
As further improvement of the utility model:
For each described first stage impeller correspondence, an inhalation port is set on described suction casing, described first stage impeller is arranged in inhalation port correspondingly.
One group of inducer is set in each described inhalation port, and described inducer is arranged on pump shaft and is positioned at a side of first stage impeller.
Being arranged in described pump shaft that described connection pipeline section locates near the section of pumping is provided with and unloads gland.
Be positioned on the pump shaft of described pump segment and be provided with plural secondary impeller.
Described pump segment is connected to form successively by the pump housing more than two groups, and the equal correspondence of each described secondary impeller is positioned at a pump housing.
The pump shaft that is positioned at described connection pipeline section is provided with one group of above auxiliary bearing assembly.
Described pump shaft, suction casing, pump segment, connection pipeline section and pump Duan Jun and be installed in frame offer import on described frame.
Compared with prior art, the utlity model has following advantage:
1, the first stage impeller assembly in the utility model adopts two adjacent first stage impellers, can reduce liquid through out-of-date flow velocity, improves inlet hydraulic, prevents that the first stage impeller assembly from producing cavitation; And two first stage impellers are staggered to be arranged, the axial force of its generation is opposite, cancels out each other, balance the axial force that produces.
2, for each first stage impeller correspondence, an inhalation port is set in the utility model, and one group of inducer is set in each inhalation port, this just is equivalent to the suction booster of respectively connecting on first stage impeller assembly both sides, increased the fluid pressure that enters first stage impeller, thereby prevented that effectively impeller from producing cavitation, improved the cavitation performance of pump.
3, be provided with on the pump shaft that is arranged in the connecting tube section in the utility model and unload gland, unload gland match with the first stage impeller assembly can balancing rotor axial force, improved working life of bearing and mechanical seal.
4, be provided with plural secondary impeller in the utility model, each secondary impeller can both further increase the pressure of liquid, in order to satisfy the pouring head of oil pipeline pump necessity.
5, pump shaft of the present utility model is provided with one group of above auxiliary bearing assembly, and radial force that can bear rotor prevents from causing because amount of deflection is excessive the wearing and tearing of rotor part.
Description of drawings
Fig. 1 is structural representation of the present utility model.
Marginal data:
1, inhalation port; 2, first stage impeller assembly; 3, inducer; 4, suck the pump housing; 5, secondary impeller; 6, the pump housing; 7, import; 8, pump shaft; 9, connecting tube; 10, frame; 11, auxiliary bearing; 12, auxiliary axle sleeve; 13, unload gland; 14, seal; 15, machine envelope; 16, machine sealed cover; 17, sealing axle sleeve; 18, pump connection; 19, Electricity Federation; 20, outlet; 21, first stage impeller; 22, pump connection setscrew nut; 23, nut; 24, adjusting nut; 25, mounting plate; 26, sleeve.
Embodiment
Below in conjunction with Figure of description and specific embodiment, the utility model is described in further detail.
As shown in Figure 1, the multistage direct connection of cylinder bag of the present utility model is installed centrifugal pump, comprise pump shaft 8 and the suction casing that is connected successively, pump segment, connection pipeline section and the section of pumping, pump shaft 8 is arranged in suction casing, pump segment and connection pipeline section and is connected, the pump shaft 8 that is arranged in place, suction casing suction side is provided with first stage impeller assembly 2, first stage impeller assembly 2 adopts double-entry impeller, namely comprise two adjacent first stage impellers 21, two first stage impellers 21 are staggered layout, to improve inlet hydraulic, use stream mode even, prevent that first stage impeller assembly 2 from producing cavitation.Two first stage impellers 21 in the running, the axial force that produces is opposite, cancel out each other, balance the axial force of self.In concrete application example, two side cover plates and the blade thickness of two first stage impellers 21 are even, so the pulse that self produces is little, vibration is little, have guaranteed the reliability of pump, have improved the working efficiency of pump.
In the present embodiment, pump shaft 8, pump segment, suction casing, connection pipeline section and pump Duan Jun and be installed in frame 10 offer import 7 on frame 10.Import 7 can be arranged on mounting plate 25 tops or the bottom of frame 10, to satisfy flexibly various as installed demands.Also can according to actual needs import 7 and the outlet 20 of the section of pumping be arranged in concrete the application arbitrarily angled, to satisfy installation requirements.
In the present embodiment, suction casing comprises two inhalation ports 1 that opening direction is opposite, and each first stage impeller 21 is arranged in inhalation port 1 correspondingly.Each inhalation port 1 is interior all arranges one group of inducer 3, inducer 3 is positioned at a side of corresponding first stage impeller 21, and be connected on pump shaft 8 by key, its effect is to be equivalent to the suction booster of respectively connecting in first stage impeller assembly 2 both sides, increased with this fluid pressure that enters first stage impeller 21, thereby prevented that effectively first stage impeller assembly 2 from producing cavitation, improved the cavitation performance of pump.Inducer 3 is located by sleeve 26, and is locked on pump shaft 8 with nut 23.
In the present embodiment, pump segment comprises the suction pump housing 4 and pump housing group, and two inhalation ports 1 are connected by bolt with the suction pump housing 4.Pump housing group is connected to form by bolt successively by the plural pump housing 6, and a secondary impeller 5 that is fixedly connected on pump shaft 8 is arranged in each pump housing 6, can further increase the pressure of liquid.The number of impeller 5 secondary according to the Location of requirement of working condition pressure and the pump housing 6 is to satisfy the pouring head of oil pipeline pump necessity.
In the present embodiment, connecting pipeline section has a connecting tube 9, and an end and the pump segment of connecting tube 9 are bolted, and the other end is connected with black box.The outlet 20 of the section of pumping communicates with the end of connecting tube 9 near black box.Pump shaft 8 in connecting tube 9 is provided with one group of above auxiliary bearing assembly, and the auxiliary bearing assembly comprises auxiliary axle sleeve 12 and auxiliary bearing 11, and auxiliary axle sleeve 12 is fixed on pump shaft 8 by key, and auxiliary bearing 11 use countersunk nuts are fixed.The auxiliary bearing assembly can bear rotor radial force, prevent from causing because amount of deflection is excessive the wearing and tearing of rotor part.Black box comprises seal 14, machine envelope 15, machine sealed cover 16 and sealing axle sleeve 17, and seal 14 passes through Bolt Connection with machine sealed cover 16.
In the present embodiment, be arranged in and connect pump shaft 8 that pipeline section locates near the section of pumping and be provided with and unload gland 13.Unload gland 13 and be threaded connection with sealing axle sleeve 17, with seal 14 by Bolt Connection, with an adjusting nut 24 with sealing axle sleeve 17 fixing and lockings on pump shaft 8.Unload gland 13 and be used for coordinating with first stage impeller assembly 2, axial force that can balancing rotor has improved working life of bearing and mechanical seal.Flow into the liquid of framies 10 from import 7 by two inhalation ports 1, enter suction pump body 4 after 2 supercharging of first stage impeller assembly, then through flowing into the pump housing 6 after the further supercharging of secondary impeller 5, by with connecting tube 9 that the pump housing 6 is connected after, from exporting 20 outflows.
In the present embodiment, be installed in frame 10 by black box with the rightabout end of suction casing on pump shaft 8, and be connected with the driven unit (not shown) in frame 10 outsides, the section of pumping is provided with a pump connection 18, pump connection 18 is rigidly connected by taper pin with the Electricity Federation 19 of driven unit, pump connection 18 is fixed on pump shaft 8 by key, and locks with pump connection setscrew nut 22.Pump shaft 8 rotates under the driving of driven unit by Electricity Federation 19 and pump connection 18, and driven unit can adopt motor.
Be only below preferred implementation of the present utility model, protection domain of the present utility model also not only is confined to above-described embodiment, and all technological schemes that belongs under the utility model thinking all belong to protection domain of the present utility model.Should be pointed out that for those skilled in the art, the some improvements and modifications not breaking away under the utility model principle prerequisite should be considered as protection domain of the present utility model.
Claims (8)
1. the multistage direct connection of cylinder bag is installed centrifugal pump, comprise pump shaft (8) and the suction casing that is connected successively, pump segment, connection pipeline section and the section of pumping, described pump shaft (8) is installed on suction casing, pump segment and connection pipeline section and is connected, the described pump shaft (8) that is arranged in place, suction casing suction side is provided with first stage impeller assembly (2), it is characterized in that: described first stage impeller assembly (2) comprise two adjacent and be the staggered first stage impeller (21) of arranging.
2. the multistage direct connection of cylinder bag according to claim 1 is installed centrifugal pump, it is characterized in that: for each described first stage impeller (21) correspondence, an inhalation port (1) is set on described suction casing, described first stage impeller (21) is arranged in inhalation port (1) correspondingly.
3. the multistage direct connection of cylinder bag according to claim 2 is installed centrifugal pump, and it is characterized in that: in each described inhalation port (1), one group of inducer (3) is set, described inducer (3) is arranged at the side that first stage impeller (21) was gone up and be positioned to pump shaft (8).
4. the according to claim 1 and 2 or 3 multistage direct connections of described cylinder bag are installed centrifugal pumps, it is characterized in that: be arranged in described pump shaft (8) that described connection pipeline section locates near the section of pumping and be provided with and unload gland (13).
5. the according to claim 1 and 2 or 3 multistage direct connections of described cylinder bag are installed centrifugal pumps, it is characterized in that: be positioned on the pump shaft (8) of described pump segment and be provided with plural secondary impeller (5).
6. the multistage direct connection of cylinder bag according to claim 5 is installed centrifugal pump, and it is characterized in that: described pump segment is connected to form successively by the pump housing more than two groups (6), and each described secondary impeller (5) all correspondence is positioned at a pump housing (6).
7. the according to claim 1 and 2 or 3 multistage direct connections of described cylinder bag are installed centrifugal pump, it is characterized in that: the pump shaft (8) that is positioned at described connection pipeline section is provided with one group of above auxiliary bearing assembly.
8. the according to claim 1 and 2 or 3 multistage direct connections of described cylinder bag are installed centrifugal pump, it is characterized in that: described pump shaft (8), suction casing, pump segment, connection pipeline section and pump Duan Jun and be installed in frame (10) offer import (7) on described frame (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220642552 CN202937458U (en) | 2012-11-29 | 2012-11-29 | Cylinder bag multistage direct connection installation centrifugal pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220642552 CN202937458U (en) | 2012-11-29 | 2012-11-29 | Cylinder bag multistage direct connection installation centrifugal pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202937458U true CN202937458U (en) | 2013-05-15 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220642552 Expired - Lifetime CN202937458U (en) | 2012-11-29 | 2012-11-29 | Cylinder bag multistage direct connection installation centrifugal pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202937458U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108825509A (en) * | 2018-08-22 | 2018-11-16 | 上海上涵自动化科技有限公司 | A kind of peak regulation energy-saving pump |
-
2012
- 2012-11-29 CN CN 201220642552 patent/CN202937458U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108825509A (en) * | 2018-08-22 | 2018-11-16 | 上海上涵自动化科技有限公司 | A kind of peak regulation energy-saving pump |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Changsha Jinggong special industrial pump Co.,Ltd. Assignor: Zhou Shouyun Contract record no.: 2013430000140 Denomination of utility model: Cylinder bag multistage direct connection installation centrifugal pump Granted publication date: 20130515 License type: Exclusive License Record date: 20130816 |
|
| LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130515 |
|
| CX01 | Expiry of patent term |