CN1693710A - Large diving electric pump - Google Patents
Large diving electric pump Download PDFInfo
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- CN1693710A CN1693710A CN 200510040140 CN200510040140A CN1693710A CN 1693710 A CN1693710 A CN 1693710A CN 200510040140 CN200510040140 CN 200510040140 CN 200510040140 A CN200510040140 A CN 200510040140A CN 1693710 A CN1693710 A CN 1693710A
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- water pump
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- rotating shaft
- motor
- scale electric
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Abstract
The invention relates to a large-scale submersible pump. The feature is that it adopts four poles or six poles electromotor, and planet gear reducer is set between rotating shaft of the electromotor and that of pump. The axle of the planet gear is connected to the rotating shaft of the electromotor. The central shaft hole of the planet gear is connected to the rotating shaft of the pump. Thus, the pump would gain low speed and great torsion. Comparing to the existing coaxial large-scale submersible pump, the efficiency is increased 5%, the power factor is increased 50% and the weight is reduced 50%.
Description
Technical field:
The present invention relates to Submerged Motor Pumps, the power of more specifically saying so reaches 250kW, bore reaches 1m and above, the band planetary gear speed-reduction large-scale electric underwater pump of pump rotary speed below 500r/min.
Background technique:
In the prior art, the motor in the large-scale electric underwater pump is coaxial setting with water pump.Linear velocity based on the water pump vane periphery must keep this design principle of specific constant, and during to large scale development, the impeller diameter of water pump is big more at water pump, and rotating speed is then low more.And for motor, the motor that power is identical, rotating speed are low more, and then its number of poles is many more, thereby the diameter of motor is big more, volume is big more, and efficient and power factor are low more.Simultaneously, the increase of motor diameter will not only tie up runner, and the stator angle of diffuser is reached more than 25 °, increase divergence loss.
Summary of the invention:
Purpose of the present invention will overcome existing defective in the prior art exactly, and a kind of volume that can effectively control motor is provided, and can keep the large-scale electric underwater pump of higher efficient of motor and power factor.
For achieving the above object, the present invention has adopted following technological scheme: a kind of large-scale electric underwater pump, it is characterized in that: adopt 4 utmost points or 6 utmost point motors, motor and water pump have independent rotating shaft respectively, between machine shaft and water pump rotating shaft, plane table thermoconductivity meter is set, and described plane table thermoconductivity meter is with the wheel shaft and the machine shaft shaft coupling of its sun gear, with the central shaft hole and the water pump rotating shaft shaft coupling of planetary wheel carrier.
Compared with the prior art, beneficial effect of the present invention is embodied in:
The present invention makes water pump obtain low speed, big torque by plane table thermoconductivity meter is set.Compare with existing coaxial type (motor is coaxial with water pump) large-scale electric underwater pump, its efficient improves more than 5%, and power factor improves more than 20%, and weight reduces 50%.
The speed ratio of plane table thermoconductivity meter can in very large range be selected in design among the present invention, helps optimizing selecting ripe hydraulic model for use, raises the efficiency, improves cavitation resistive property.
Summary of drawings
Fig. 1 is a structure principle chart of the present invention;
Fig. 2 is the structural representation at plane table thermoconductivity meter position among the present invention;
Fig. 3 is the structural representation at the floating fulcrum position of sun gear among the present invention;
Fig. 4 is the structural representation of two flanged thrust-bearing end caps among the present invention.
Drawing reference numeral: motor 10, machine shaft 11, motor thrust-bearing 12; Plane table thermoconductivity meter 20, sun gear 21, wheel shaft 211, planetary wheel carrier 22, central shaft hole 221, floating fulcrum 23; Water pump 30, water pump rotating shaft 31, impeller 32; Water pump radial bearing 40; Water pump radial bearing 50; Water pump thrust-bearing 60; Motor thrust-bearing end cap 70; Petcock 80; The first road mechanical seal 90; The second road mechanical seal 100; The 3rd road mechanical seal 110.
Embodiment
As shown in Figure 1, large-scale electric underwater pump disclosed by the invention adopts 4 utmost points or 6 pole motors, motor 10 has independent rotating shaft respectively with water pump 30, between machine shaft 11 and water pump rotating shaft 31, plane table thermoconductivity meter 20 is set, described plane table thermoconductivity meter 20 is with the wheel shaft 211 and machine shaft 11 shaft couplings of its sun gear 21, with the central shaft hole 221 and water pump rotating shaft 31 shaft couplings of planetary wheel carrier 22.So-called motor 10 has independent rotating shaft respectively with water pump 30 and is meant that motor 10 and water pump 30 do not have a shared axle in this aspect invention, and motor 10 has oneself independently rotating shaft respectively with water pump 30, and both connect the back transmitting torques by plane table thermoconductivity meter 20.
As shown in Figure 1, 2, 3, be floating type coupling between the central shaft hole 221 of the wheel shaft 211 of machine shaft 11 and sun gear 21 and water pump rotating shaft 31 and planetary wheel carrier 22.
As shown in Figure 1, 2, 3, described floating type coupling by machine shaft 11 and wheel shaft 211 and water pump rotating shaft 31 and central shaft hole 221 with between constitute for floating type spline and keyhole cooperate, described sun gear 21 has floating fulcrum 23 with the middle part end face binding site of planetary wheel carrier 22, floating fulcrum 23 is convex parts, and the end face that is resisted against planetary wheel carrier 22 1 sides is smooth ball arcuation surface.The movable working principle that cooperates is: described sun gear 21 cooperates with three planet wheel gears, and backlash is arranged therebetween, axially has floating fulcrum 23 spacing, avoid sun gear to fall down, so sun gear 21 floats.At the input end of sun gear 21, adopt spline to be connected between the wheel shaft 211 of machine shaft 11 and sun gear 21, backlash is also arranged therebetween, and constitute the connection of floating; In like manner,, adopt spline to be connected between the central shaft hole 221 of planetary wheel carrier 22 and the water pump rotating shaft 31, backlash is also arranged therebetween, and constitute the connection of floating at the clutch end of planetary wheel carrier 22.This plug-in type floating structure, the functional reliability problem that on the one hand can avoid rigid joint to bring, on the other hand, make its each other assembling and dismantle very conveniently, be easy to maintenance, care and maintenance.
As shown in Figure 1, two water pumps cover radial bearing 40 is set in described water pump rotating shaft 31,50 and one cover water pump thrust-bearing 60, it is distolateral that wherein a cover water pump radial bearing 40 is arranged on the water outlet of impeller 32, another set of water pump radial bearing 50 is arranged on an end of the central shaft hole 221 of the close planetary wheel carrier 22 in the water pump rotating shaft 31, as seen from Figure 1, water pump thrust-bearing 60 is arranged on two cover radial bearings 40, between 50, adopt this bearings scheme, can shorten pump end cantilever effectively, strengthen the rigidity of pump shaft, improve 60 life-spans of thrust-bearing, so this structure can be with the horizontal use of electric pump, machine shaft 11 is with water pump rotating shaft 31 and is horizontally disposed with.
The present invention also can adopt the high-level installed vertical mode of motor in concrete the enforcement, and promptly described machine shaft 11 is upright with water pump rotating shaft 31, and motor 10 is positioned at the top, and water pump 30 is positioned at the bottom.
As shown in Figure 4, motor thrust-bearing 12 on the described motor 10 adopts two flanged thrust-bearing end caps 70, the stage casing of described thrust-bearing end cap 70 is a necking down shape structure, its necking down position and motor thrust-bearing 12 fit, so-called pair of flange-type structure is meant that thrust-bearing end cap 70 has two mounting flanges, a flange is used for being connected with electric machine casing, one is used for being connected with gear reduction box, the necking down position is between two flanges, the inside at necking down position is exactly in fact a bearing support that is used for fixing thrust-bearing end cap 70, this structure is provided with, make working flow can directly be cooled to the shell at motor thrust-bearing 12 places, utilize the pumping current to contact its stage casing, the cooling motor thrust-bearing 12 effectively, improve the radiating effect of motor thrust block axle 12, avoid occurring the too high fault of bearing temperature.Improve functional reliability.
As shown in Figure 1, the present invention is for the ease of safeguarding, at described thrust-bearing end cap 70 necking down positions and the bottom that is positioned at the motor cavity be provided with gas-liquid petcock 80, be used to discharge the condensation hydrops that motor internal may exist, or change the motor internal cooling medium.
Three road mechanical seals are set, and the first road mechanical seal 90 is positioned at the shaft extension end of water pump rotating shaft 31, is used to prevent that working flow from entering the oil pocket of cutting oil; The second road mechanical seal 100 is positioned at the die cavity of the cutting oil of water pump rotating shaft 31, prevents that cutting oil intensification expansion from spilling; The 3rd road mechanical seal 110 is positioned at the shaft extension end of machine shaft 11, prevents that cutting oil from entering in the motor cavity.Adopt three road mechanical seals can strengthen the sealing effect of Submerged Motor Pumps, improve the life-span of Sealing, therefore Security and the Security that has also improved Submerged Motor Pumps simultaneously.
Because the combination of high-speed electric expreess locomotive and plane table thermoconductivity meter makes its diameter diminish, thereby in the present embodiment, the diffuser angle of flare can be less than 12 °, the same specification Submerged Motor Pumps diffuser angle of flare with planetary gear speed-reduction is not about 25 ° to 30 °, after the diffuser angle of flare reduces, pumps water stream is better through motor outer surface cleanliness, has reduced flow resistance loss, can improve the efficient of pumping plant effectively.
During concrete enforcement, can select hermetically sealed motor for use, cooling medium is transformer oil or inert gas in the motor cavity, as nitrogen.The working flow of motor cavity and extraneous pumping is isolated mutually.
As shown in Figure 1, three Bearing Installation in plane table thermoconductivity meter 20 and the water pump 30 adopt oil to cool off and lubricate in the die cavity of sealing.During 60 rotations of water pump thrust-bearing, play the effect of pumping cutting oil, cutting oil circulated in the die cavity of sealing, transmit heat, and form oil with the outer swiftly flowing current of die cavity through the die cavity wall---water cooling.Show in the plane table thermoconductivity meter 20 cooling mediums respectively with arrow among the figure and flow to that cooling medium flows to 34 in the working flow 24 and water pump 30 pump housings, like this device feature is cooled off, thus operational safety and the life-span that can effectively improve water pump.
Claims (10)
1, a kind of large-scale electric underwater pump, it is characterized in that: adopt 4 utmost points or 6 utmost point motors (10), motor (10) has independent rotating shaft respectively with water pump (30), between machine shaft (11) and water pump rotating shaft (31), plane table thermoconductivity meter (20) is set, described plane table thermoconductivity meter (20) is with the wheel shaft (211) and machine shaft (11) shaft coupling of its sun gear (21), with the central shaft hole (221) and water pump rotating shaft (31) shaft coupling of planetary wheel carrier (22).
2, large-scale electric underwater pump according to claim 1 is characterized in that: be floating type coupling between the central shaft hole (221) of the wheel shaft (211) of machine shaft (11) and sun gear (21) and water pump rotating shaft (31) and planetary wheel carrier (22).
3, large-scale electric underwater pump according to claim 2 is characterized in that: described floating type coupling by machine shaft (11) and wheel shaft (211) and water pump rotating shaft (31) and central shaft hole (221) with between cooperate formation for floating type spline and keyhole.
4, according to claim 2 or 3 described large-scale electric underwater pumps, it is characterized in that: described sun gear (21) has floating fulcrum with the middle part end face binding site of planetary wheel carrier (22).
5, large-scale electric underwater pump according to claim 1, it is characterized in that: two cover water pump radial bearings (40), (50) and a cover water pump thrust-bearing (60) are set in described water pump rotating shaft (31), wherein to be arranged on the water outlet of impeller (32) distolateral for a cover water pump radial bearing (40), and another set of water pump radial bearing (50) is arranged on an end of the central shaft hole (221) of the close planetary wheel carrier (22) in the water pump rotating shaft (31).
6, large-scale electric underwater pump according to claim 5 is characterized in that: described machine shaft (11) is upright with water pump rotating shaft (31), and motor (10) is positioned at the top, and water pump (30) is positioned at the bottom.
7, large-scale electric underwater pump according to claim 1, it is characterized in that: the motor thrust-bearing (12) on the described motor (10) adopts two flanged thrust-bearing end cap (70) support fixation, the stage casing of described thrust-bearing end cap (70) is a necking down shape structure, and its necking down position and motor thrust-bearing (12) fit.
8, large-scale electric underwater pump according to claim 7 is characterized in that: at the necking down position of described thrust-bearing end cap (70) and the bottom that is positioned at the motor cavity be provided with gas-liquid petcock (80).
9, according to claim 1 or 2 or 3 described large-scale electric underwater pumps, it is characterized in that: three road mechanical seals are set, the first road mechanical seal (90) is positioned at the shaft extension end of water pump rotating shaft (31), the second road mechanical seal (100) is positioned at the die cavity of the cutting oil of water pump rotating shaft (31), and the 3rd road mechanical seal (110) is positioned at the shaft extension end of machine shaft (11).
10, large-scale electric underwater pump according to claim 1 is characterized in that: the diffuser angle of flare of described water pump (30) is less than 12 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510040140 CN1693710A (en) | 2005-05-20 | 2005-05-20 | Large diving electric pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510040140 CN1693710A (en) | 2005-05-20 | 2005-05-20 | Large diving electric pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1693710A true CN1693710A (en) | 2005-11-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200510040140 Pending CN1693710A (en) | 2005-05-20 | 2005-05-20 | Large diving electric pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1693710A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105276154A (en) * | 2015-11-17 | 2016-01-27 | 江苏瑞星减速机有限公司 | Speed reducer special for submerged pump |
-
2005
- 2005-05-20 CN CN 200510040140 patent/CN1693710A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105276154A (en) * | 2015-11-17 | 2016-01-27 | 江苏瑞星减速机有限公司 | Speed reducer special for submerged pump |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |