CN112460031A - Impeller built-in high-speed centrifugal pump - Google Patents
Impeller built-in high-speed centrifugal pump Download PDFInfo
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- CN112460031A CN112460031A CN202011357400.XA CN202011357400A CN112460031A CN 112460031 A CN112460031 A CN 112460031A CN 202011357400 A CN202011357400 A CN 202011357400A CN 112460031 A CN112460031 A CN 112460031A
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- motor
- inducer
- impeller
- centrifugal pump
- motor rotor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D7/00—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts
- F04D7/02—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type
- F04D7/06—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type the fluids being hot or corrosive, e.g. liquid metals
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D13/00—Pumping installations or systems
- F04D13/02—Units comprising pumps and their driving means
- F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
- F04D13/0646—Units comprising pumps and their driving means the pump being electrically driven the hollow pump or motor shaft being the conduit for the working fluid
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D13/00—Pumping installations or systems
- F04D13/02—Units comprising pumps and their driving means
- F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
- F04D13/0606—Canned motor pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D13/00—Pumping installations or systems
- F04D13/02—Units comprising pumps and their driving means
- F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
- F04D13/0606—Canned motor pumps
- F04D13/064—Details of the magnetic circuit
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/18—Rotors
- F04D29/22—Rotors specially for centrifugal pumps
- F04D29/2238—Special flow patterns
- F04D29/225—Channel wheels, e.g. one blade or one flow channel
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/18—Rotors
- F04D29/22—Rotors specially for centrifugal pumps
- F04D29/2261—Rotors specially for centrifugal pumps with special measures
- F04D29/2266—Rotors specially for centrifugal pumps with special measures for sealing or thrust balance
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/14—Structural association with mechanical loads, e.g. with hand-held machine tools or fans
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention provides a high-speed centrifugal pump with a built-in impeller, which comprises a shell and a rotating wheel, wherein the rotating wheel is rotatably arranged in the shell; the motor stator is electrified to enable the motor rotor to rotate; the centrifugal impeller and the inducer rotate synchronously; the rotating speed of the rotating wheel is not lower than 2800 r/min. The invention overcomes the problem that the water outlet direction of the traditional centrifugal pump is vertical to the rotary axis of the pump, simultaneously reduces the structural size of the traditional centrifugal pump, reduces the axial force of the rotor, and can meet the requirements of high-speed sailing devices such as torpedoes and the like on high lift, high flow, stable operation and compact structure of the water jet propulsion pump.
Description
Technical Field
The invention relates to the field of centrifugal pumps, in particular to a high-speed centrifugal pump with a built-in impeller.
Background
The water jet propulsion is an important guarantee for realizing the technical index of the water navigational speed, and the reaction force generated by the water flow sprayed by the water jet propulsion pump is used for pushing the ship to advance. As a core component of a water jet propulsion device, common pump-type structures include axial flow, mixed flow, and centrifugal. Because the water outlet direction of the traditional centrifugal pump is vertical to the rotation axis of the pump, the arrangement of the water outlet pipeline is complicated, and high hydraulic loss can occur, so that the traditional centrifugal pump is rarely adopted. The axial flow pump has simple and compact structure and light weight, and is mainly used for occasions with low lift and large flow. At present, axial-flow type water jet propulsion pumps are mostly adopted for high-speed ships and amphibious vehicles. However, in some high speed sailing devices, such as torpedo and other high speed sailing devices, it is necessary to meet a large flow rate and also to provide a high lift, which is an application that is difficult to meet with the axial flow pump. On the other hand, high-speed sailing devices such as torpedoes have higher requirements on the structural compactness of the propeller, which is difficult to meet by the traditional axial-flow type water jet propulsion pump. To meet the requirement of high lift and large flow, the most common and most stable operation is the centrifugal pump, in particular to the high-speed centrifugal pump with the rotating speed of more than 2800 r/min. Therefore, it is necessary to provide a new centrifugal pump structure to overcome the problem that the water outlet direction of the conventional centrifugal pump is perpendicular to the rotation axis of the pump, and at the same time, to reduce the structural size of the centrifugal pump and the axial force of the rotor, so as to meet the requirement of high-speed navigation devices such as torpedoes and the like on compact size of each component.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides the impeller built-in high-speed centrifugal pump, which cancels a motor arranged at one end of a pump shaft of the traditional centrifugal pump, and directly fixes the inner circle of a rotor of the motor with the outer circle of an inducer, thereby reducing the structural length of the whole device on one hand, realizing the collineation of the water outlet direction of the pump and the rotary axis on the other hand, and facilitating the arrangement of a water outlet pipeline of a later stage water spraying propulsion device. The rotating wheel of the invention adopts a structure that the inducer is matched with the centrifugal impeller, thus improving the cavitation resistance of the invention and ensuring that the invention can operate under higher-speed working conditions. The pressure difference at the inlet and outlet ends of the motor rotor can balance the axial force generated when the inducer and the centrifugal impeller rotate at high speed. The excircle of the inducer is directly fixed on the inner circle of the motor rotor, and no gap exists between the tops of the inducer blades, so that the internal leakage of the device is reduced, and the efficiency of the whole device is improved. The impeller built-in high-speed centrifugal pump has the advantages of compact structure, high-speed stable operation, axial force balance, high efficiency and the like.
The present invention achieves the above-described object by the following technical means.
A high-speed centrifugal pump with a built-in impeller comprises a shell and a rotating wheel, wherein the rotating wheel is rotatably arranged in the shell, and the high-speed centrifugal pump is characterized by further comprising a motor stator and a motor rotor, wherein the motor stator is arranged on the shell; the motor stator is electrified to enable the motor rotor to rotate; the centrifugal impeller and the inducer rotate synchronously; the rotating speed of the rotating wheel is not lower than 2800 r/min.
Further, the inducer and the centrifugal impeller are integrated, and no gap exists between the inducer and the centrifugal impeller.
Furthermore, the inducer and the centrifugal impeller are split, the inducer and the centrifugal impeller are respectively in transmission connection with a shaft, the motor rotor drives the inducer to rotate, and the inducer enables the centrifugal impeller to synchronously rotate through the shaft.
Further, install the housing between motor stator and the electric motor rotor, housing one end and horn tube are connected, the housing other end is connected with the motor baffle, the housing is used for separating motor stator and water.
Further, still include the motor baffle, the outer lane clearance fit of one end and inducer of motor baffle, the other end of motor baffle is installed between motor housing and the rearmounted stator. And a mechanical seal is arranged between the motor partition plate and the motor rotor and used for inhibiting a medium flowing between the outer ring and the motor partition plate from directly flowing into the motor cavity.
Further, the clearance value between the motor partition plate and the outer ring is 0.001 time of the diameter of the inlet of the shell, and when the value of 0.001 time of the diameter of the inlet of the shell is smaller than 0.2mm, the clearance value is 0.2 mm.
Furthermore, a shielding sleeve is arranged between the motor stator and the motor rotor and used for separating the motor stator from the water body.
Further, the inducer is an axial-flow impeller.
Further, the blade thickness of the inducer satisfies the following formula:
δ＝HK1+K2
in the formula: delta is the blade thickness of the inducer, H is the flow channel width of the inducer, K1The thickness coefficient of the blade is 0.02-0.06, K2The thickness correction coefficient of the blade is 1-3 mm.
Furthermore, the horn tube, the shielding sleeve and one end of the motor rotor form a high-pressure cavity, and the motor partition plate, the shielding sleeve and the other end of the motor rotor form a pressure relief cavity; a diversion trench is arranged in the motor rotor, is communicated with the high-pressure cavity and the centrifugal impeller outlet and is used for introducing gap flow of the centrifugal impeller outlet into the high-pressure cavity; an annular gap is arranged between the motor rotor and the shielding sleeve and is communicated with the high-pressure cavity and the pressure relief cavity; a pressure relief groove is formed in the motor partition plate, one end of the pressure relief groove is communicated with the pressure relief cavity, and the other end of the pressure relief groove is connected with the outside through a pressure relief pipe; the pressure difference at the inlet and outlet ends of the motor rotor can balance the axial force generated when the inducer and the centrifugal impeller rotate at high speed.
The invention has the beneficial effects that:
1. the high-speed centrifugal pump with the built-in impeller provided by the invention has the advantages that a high-pressure area is formed at the inlet end of the motor rotor, a low-pressure area is formed at the outlet end of the motor rotor, and the axial force generated when the inducer and the centrifugal impeller operate is balanced.
2. The impeller built-in high-speed centrifugal pump has the advantages that the water outlet direction of the pump is collinear with the rotation axis, and the arrangement of a water outlet pipeline of a later-stage water spraying propulsion device is convenient.
3. The impeller built-in high-speed centrifugal pump adopts a structure that the inducer is matched with the centrifugal impeller, improves the cavitation resistance of the impeller built-in high-speed centrifugal pump, and ensures that the impeller built-in high-speed centrifugal pump can operate under a higher working condition.
4. Compared with the traditional centrifugal pump, the high-speed centrifugal pump with the built-in impeller has shorter axial distance and lighter motor, and is suitable for high-speed sailing devices with compact structures such as torpedoes and the like.
Drawings
Fig. 1 is an overall structure diagram of a high-speed centrifugal pump with a built-in impeller according to the present invention.
Fig. 2 is a structure diagram of the rotary wheel according to the present invention.
Fig. 3 is a schematic diagram of the medium flow in the rotor region of the motor according to the invention.
In the figure:
1-a horn tube; 2-motor housing; 3-a motor stator; 4-a motor rotor; 5-motor partition board; 6-rear guide vane; 7-a guide bearing; 8-first dynamic sealing; 9-a rotating wheel; 10-axis; 11-a shielding sleeve; 12-second dynamic seal; 13-a bidirectional thrust bearing; 14-mechanical sealing; 15-pressure relief pipe; 1 a-leading guide vane; 1 b-a water guide cone; 1 c-a high pressure chamber; 4 a-a diversion trench; 4 b-the annulus; 5 a-a pressure relief groove; 5 b-a pressure relief cavity; 901-inducer; 902-centrifugal impeller; 9 a-outer ring; delta-the blade thickness of the inducer; h-width of flow channel of inducer.
Detailed Description
The invention will be further described with reference to the following figures and specific examples, but the scope of the invention is not limited thereto.
As shown in fig. 1 and 2, the impeller built-in high-speed centrifugal pump of the present invention comprises a bell pipe 1, a motor housing 2, a motor stator 3, a motor rotor 4, a motor partition 5, a rear guide vane 6, a guide bearing 7, a runner 9, a shaft 10 and a bidirectional thrust bearing 13, wherein the runner 9 is fixed on the shaft 10, and the guide bearing 7 and the bidirectional thrust bearing 13 are respectively installed at two ends of the shaft 10; the one end at motor housing 2 is installed to horn pipe 1, and motor baffle 5 and rearmounted stator 6 are connected gradually to motor housing 2's the other end, motor stator 3 fixes inside motor housing 2. The outer circle of the rotating wheel 9 is fixedly connected with the inner circle of the motor rotor 4, the rotating wheel 9 comprises an inducer 901 and a centrifugal impeller 902, and the outer edge of the inducer 901 is provided with an outer ring 9a for eliminating a blade top gap; the outer ring 9a of the inducer 901 is fixedly connected with the inner circle of the motor rotor 4; the centrifugal impeller 902 and the inducer 901 rotate synchronously. The rotating speed of the rotating wheel 9 is not lower than 2800 r/min.
The blade thickness of the inducer 901 satisfies the following formula:
δ＝HK1+K2
in the formula: delta is the blade thickness of inducer 901, H is the flow channel width of inducer 901, K1The thickness coefficient of the blade is 0.02-0.06, K2The thickness correction coefficient of the blade is 1-3 mm.
The inducer 901 and the centrifugal impeller 902 of the runner 9 may be integrated, or may be divided into two bodies. The inducer 901 and the centrifugal impeller 902 are integrated, and no gap exists between the inducer 901 and the centrifugal impeller 902. The inducer 901 and the centrifugal impeller 902 are split, the inducer 901 and the centrifugal impeller 902 are in transmission connection with the shaft 10 respectively, the motor rotor 4 drives the inducer 901 to rotate, and the inducer 901 enables the centrifugal impeller 902 to rotate synchronously through the shaft 10.
One end of the motor partition plate 5 is close to the outer ring 9a of the rotating wheel 9. And a mechanical seal 14 is arranged between the motor partition plate 5 and the motor rotor 4. The clearance value between the motor partition plate 5 and the outer ring 9a is 0.001 time of the inlet diameter, and when the value of 0.001 time of the inlet diameter is smaller than 0.2mm, the clearance value is 0.2 mm. The guide vane type water guiding device is characterized in that a front guide vane 1a and a water guiding cone 1b are machined in the horn tube 1, the guide bearing 7 is installed in the water guiding cone 1b, and a first dynamic seal 8 can be further installed at the position, close to the outlet of the water guiding cone 1b, of the guide bearing 7. Install housing 11 between motor stator 3 and the electric motor rotor 4, 11 one end of housing is connected with horn pipe 1, the 11 other end of housing is connected with motor baffle 5, the effect of housing 11 is separated motor stator 3 and water. The outer ring of the bidirectional thrust bearing 13 is fixed in a middle circular hole of the rear guide vane 6, and a second dynamic seal 12 is arranged at a position close to the outlet of the circular hole.
The motor rotor 4 is positioned in a pressure cavity formed by the shielding sleeve 11, the horn tube 1, the outer ring 9a and the motor partition plate 5, the motor rotor 4 divides the pressure cavity into a high-pressure cavity 1c and a pressure relief cavity 5b, one end of the horn tube 1, the shielding sleeve 11 and one end of the motor rotor 4 form the high-pressure cavity 1c, and the other end of the motor partition plate 5, the shielding sleeve 11 and the other end of the motor rotor 4 form the pressure relief cavity 5 b; a guide groove 4a is arranged in the motor rotor 4, and the guide groove 4a is communicated with the high-pressure cavity 1c and the outlet of the centrifugal impeller 902 and is used for introducing gap flow at the outlet of the centrifugal impeller 902 into the high-pressure cavity 1 c; an annular gap 4b is arranged between the motor rotor 4 and the shielding sleeve 11, and the annular gap 4b is communicated with the high-pressure cavity 1c and the pressure relief cavity 5 b; a pressure relief groove 5a is formed in the motor partition plate 5, one end of the pressure relief groove 5a is communicated with the pressure relief cavity, and the other end of the pressure relief groove 5a is connected with the outside through a pressure relief pipe 15; the pressure difference at the inlet and outlet ends of the motor rotor 4 can balance the axial force generated when the inducer 901 and the centrifugal impeller 902 rotate at high speed.
The installation mode is as follows:
firstly, the installation of a rotor: the static ring of the mechanical seal 14 is arranged on the outer side of the motor partition plate 5, and the dynamic ring of the mechanical seal 14 is arranged on one side of the motor rotor 4 close to the outlet. The motor partition plate 5 is placed on the rotating wheel 9, the excircle of the rotating wheel 9 and the inner circle of the motor rotor 4 are fixed, and the movable ring and the static ring of the mechanical seal 14 are guaranteed to be tightly matched. The dynamic seal comprises a packing seal and a mechanical seal. When the packing seal is used, the bidirectional thrust bearing 13 is arranged at one end of the shaft 10 and fixed in the middle round hole of the rear guide vane 6, and then the packing seal is arranged between the shaft 10 and the inner wall of the middle round hole of the rear guide vane 6 to protect the bidirectional thrust bearing 13 from contacting with a fluid medium. When the mechanical seal is used, the mechanical seal and the bidirectional thrust bearing 13 are sequentially installed at one end of the shaft 10, and then the mechanical seal and the bidirectional thrust bearing 13 are fixed in the middle circular hole of the rear guide vane 6. Then, the runner 9 passes through the shaft 10, and the runner 9 is fixed on the shaft 10 by using a positioning structure.
Install motor stator 3 in motor housing 2's inside, adopt location structure to fix motor stator 3 on motor housing 2, use housing 11 to live motor stator 3 parcel. The motor stator 3 is placed along the axial direction of the motor rotor 4, one end of the motor shell 2 is fixedly connected with the motor partition plate 11 and the rear guide vane 6, and the other end of the motor shell is connected with the horn tube 1. The motor stator structure is characterized in that holes are formed in the outer side of the motor shell 2 close to the outlet end, a pressure relief pipe 15 penetrates through the holes and is connected with a pressure relief groove 5a, and a sealant or welding mode is adopted between the pressure relief pipe 15 and the holes to inhibit external fluid media from flowing into a cavity around the motor stator 3.
A guide bearing 7 and a first dynamic seal 8 are sequentially arranged in a water guide cone 1b in the middle of the horn tube 1, and a shaft 10 penetrates into the water guide cone 1b while the horn tube 1 is sleeved in and connected with the motor shell 2, so that the installation is completed.
In order to ensure the structural stability of the motor rotor 4, the positioning pin can be additionally arranged in the flow guide groove 4a while the flow capacity of the flow guide groove 4a is ensured.
The working principle is as follows:
when the motor runs, the motor rotor 4 drives the rotating wheel 9 connected with the motor rotor to rotate, the rotating wheel 9 is fixed on the shaft 10, and two ends of the shaft are respectively fixed inside the middle circular holes of the water guide cone 1b and the rear guide vane 6 through the guide bearing 7 and the two-way thrust bearing 13. The guide bearing 7 and the bidirectional thrust bearing 13 are used for restraining the axial displacement and the radial displacement of the rotor and ensuring the normal operation of the device. The runner 9 comprises an inducer 901 and a centrifugal impeller 902, wherein the inducer 901 can improve the cavitation resistance of the whole device to ensure that the runner 9 can stably operate at a higher rotating speed. The fluid medium is driven by the rotation of the runner 9 to flow through the flared tube 1, the runner 9 and the rear guide vane 6 in sequence.
As shown in fig. 3, the high pressure difference at the inlet and outlet of the rotor 9 causes the medium to form an internal leakage through the gap outside the rotor 9, which is difficult to avoid. According to the invention, the first guide groove 4a processed on the motor rotor 4 is used for directly introducing the internally leaked fluid medium into the high-pressure cavity 1c of the motor rotor 4 close to the inlet, at the moment, the fluid medium in the high-pressure cavity has two outflow channels, one is directly flowed into the inlet of the rotating wheel 9 through the gap between the motor rotor 4 and the flared tube 1, and the other is flowed into the pressure relief cavity 5b through the annular gap 4 b. The inside of the pressure relief cavity 5b is connected with the outside through a pressure relief groove 5a processed on the motor partition plate 5 and a pressure relief pipe 15, and the inside of the pressure relief cavity 5b keeps lower pressure. Further, the axial force generated when the inducer 901 and the centrifugal impeller 902 rotate at high speed can be balanced by the axial force directed from the device inlet to the device outlet in the strokes of both ends of the motor rotor 4.
The present invention is not limited to the above-described embodiments, and any obvious improvements, substitutions or modifications can be made by those skilled in the art without departing from the spirit of the present invention.
Claims (10)
1. A high-speed centrifugal pump with a built-in impeller comprises a shell and a rotating wheel (9), wherein the rotating wheel (9) is rotatably arranged in the shell, and the high-speed centrifugal pump is characterized by further comprising a motor stator (3) and a motor rotor (4), wherein the motor stator (3) is arranged on the shell, the motor rotor (4) is fixedly connected with the rotating wheel (9), the rotating wheel (9) comprises an inducer (901) and a centrifugal impeller (902), the outer edge of the inducer (901) is provided with an outer ring (9a), and the outer ring (9a) of the inducer (901) is fixedly connected with the inner circle of the motor rotor (4); the motor stator (3) is electrified to enable the motor rotor (4) to rotate; the centrifugal impeller (902) and the inducer (901) rotate synchronously; the rotating speed of the rotating wheel (9) is not lower than 2800 r/min.
2. The impeller built-in high-speed centrifugal pump according to claim 1, wherein the inducer (901) and the centrifugal impeller (902) are integrated, and there is no gap between the inducer (901) and the centrifugal impeller (902).
3. The impeller built-in high-speed centrifugal pump according to claim 1, wherein the inducer (901) and the centrifugal impeller (902) are split, the inducer (901) and the centrifugal impeller (902) are respectively in transmission connection with a shaft (10), the motor rotor (4) drives the inducer (901) to rotate, and the inducer (901) enables the centrifugal impeller (902) to synchronously rotate through the shaft (10).
4. The impeller built-in high-speed centrifugal pump according to any one of claims 1 to 3, characterized in that the housing comprises a flared tube (1), a motor housing (2) and a rear guide vane (6), one end of the motor housing (2) is connected with the flared tube (1), the other end of the motor housing (2) is connected with the rear guide vane (6), and a motor stator (3) is installed in the motor housing (2).
5. The impeller built-in high-speed centrifugal pump according to claim 4, further comprising a motor partition plate (5), wherein one end of the motor partition plate (5) is in clearance fit with an outer ring (9a) of the inducer (901), and the other end of the motor partition plate (5) is installed between the motor casing (2) and the rear guide vane (6); and a mechanical seal (14) is arranged between the motor partition plate (5) and the motor rotor (4).
6. The impeller built-in high-speed centrifugal pump according to claim 5, wherein the clearance between the motor partition plate (5) and the outer ring (9a) has a value of 0.001 times the inlet diameter of the casing, and when the value of 0.001 times the inlet diameter of the casing is less than 0.2mm, the clearance is 0.2 mm.
7. The impeller built-in high-speed centrifugal pump according to claim 4, characterized in that a shielding sleeve (11) is arranged between the motor stator (3) and the motor rotor (4), one end of the shielding sleeve (11) is connected with the flared tube (1), the other end of the shielding sleeve (11) is connected with the motor partition plate (5), and the shielding sleeve (11) is used for separating the motor stator (3) from a water body.
8. The impeller built-in high-speed centrifugal pump according to any one of claims 1 to 3, wherein the inducer (901) is an axial-flow impeller.
9. The impeller built-in high-speed centrifugal pump according to any one of claims 1 to 3, wherein the thickness of the blade of the inducer (901) satisfies the following formula:
δ＝HK1+K2
in the formula: delta is the blade thickness of the inducer (901), H is the flow channel width of the inducer (901), K1The thickness coefficient of the blade is in a value range of 0.02-0.06; k2The thickness correction coefficient of the blade is 1-3 mm.
10. The impeller built-in high-speed centrifugal pump according to claim 7, wherein the flared tube (1), the shielding sleeve (11) and one end of the motor rotor (4) form a high-pressure chamber (1c), and the other end of the motor partition plate (5), the shielding sleeve (11) and the other end of the motor rotor (4) form a pressure relief chamber (5 b); a flow guide groove (4a) is formed in the motor rotor (4), and the flow guide groove (4a) is communicated with the high-pressure cavity (1c) and the outlet of the centrifugal impeller (902) and is used for introducing gap flow of the outlet of the centrifugal impeller (902) into the high-pressure cavity (1 c); an annular gap (4b) is arranged between the motor rotor (4) and the shielding sleeve (11), and the annular gap (4b) is communicated with the high-pressure cavity (1c) and the pressure relief cavity (5 b); a pressure relief groove (5a) is formed in the motor partition plate (5), one end of the pressure relief groove (5a) is communicated with the pressure relief cavity, and the other end of the pressure relief groove is connected with the outside through a pressure relief pipe (15); the pressure difference at the inlet and outlet ends of the motor rotor (4) can balance the axial force generated when the inducer (901) and the centrifugal impeller (902) rotate at high speed.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2019111898035 | 2019-11-28 | ||
| CN201911189803.5A CN110953160A (en) | 2019-11-28 | 2019-11-28 | Impeller built-in high-speed centrifugal pump |
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| Publication Number | Publication Date |
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| CN112460031A true CN112460031A (en) | 2021-03-09 |
| CN112460031B CN112460031B (en) | 2022-07-22 |
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| CN201911189803.5A Pending CN110953160A (en) | 2019-11-28 | 2019-11-28 | Impeller built-in high-speed centrifugal pump |
| CN202011357400.XA Active CN112460031B (en) | 2019-11-28 | 2020-11-27 | Impeller built-in high-speed centrifugal pump |
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| CN201911189803.5A Pending CN110953160A (en) | 2019-11-28 | 2019-11-28 | Impeller built-in high-speed centrifugal pump |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113323080A (en) * | 2021-04-15 | 2021-08-31 | 朱福栋 | Efficient mechatronic water supply installation |
| CN114962320A (en) * | 2022-04-22 | 2022-08-30 | 浙江理工大学 | Self-lubricating cooling circulation system for shaftless drive deep sea mining mixing transportation pump |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110953160A (en) * | 2019-11-28 | 2020-04-03 | 江苏大学 | Impeller built-in high-speed centrifugal pump |
| CN112253492B (en) * | 2020-09-08 | 2022-04-26 | 江苏大学 | Multistage low-temperature centrifugal pump with built-in motor |
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| US6514053B2 (en) * | 2000-02-10 | 2003-02-04 | Toshiba Tec Kabushiki Kaisha | Motor-driven pump with a plurality of impellers |
| US20060099068A1 (en) * | 2004-11-05 | 2006-05-11 | Toshiba Tec Kabushiki Kaisha | Axial flow pump |
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| CN203308764U (en) * | 2013-06-18 | 2013-11-27 | 济宁安泰矿山设备制造有限公司 | Mining submerged pump with axial balancing drum |
| CN106351852A (en) * | 2016-11-14 | 2017-01-25 | 合肥恒大江海泵业股份有限公司 | Vane wheel built-in submersible electric pump with stator coil protection sleeve |
| US20190040862A1 (en) * | 2017-08-01 | 2019-02-07 | Baker Hughes, A Ge Company, Llc | Permanent Magnet Pump |
| CN109538497A (en) * | 2018-12-06 | 2019-03-29 | 合肥恒大江海泵业股份有限公司 | A kind of built-in submersed three-flow pump of dry stator impeller |
| CN110030193A (en) * | 2019-05-16 | 2019-07-19 | 上海创科泵业制造有限公司 | Multi-stage shield pump and the water-carriage system for applying it |
| CN110953160A (en) * | 2019-11-28 | 2020-04-03 | 江苏大学 | Impeller built-in high-speed centrifugal pump |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP5882245B2 (en) * | 2013-02-26 | 2016-03-09 | シナノケンシ株式会社 | Manufacturing method of electric fluid pump |
| CN204253379U (en) * | 2014-11-15 | 2015-04-08 | 合肥恒大江海泵业股份有限公司 | The built-in submersible axial flow pump of a kind of both stage impellers |
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| CN102840142A (en) * | 2012-09-26 | 2012-12-26 | 上海创科泵业制造有限公司 | Multistage shield pump placed on electric motor |
| CN203189321U (en) * | 2013-03-04 | 2013-09-11 | 重庆西泉泵业股份有限公司 | Adjustable axial force balancing structure for multistage centrifugal pump with back-to-back impellers |
| CN203308764U (en) * | 2013-06-18 | 2013-11-27 | 济宁安泰矿山设备制造有限公司 | Mining submerged pump with axial balancing drum |
| CN106351852A (en) * | 2016-11-14 | 2017-01-25 | 合肥恒大江海泵业股份有限公司 | Vane wheel built-in submersible electric pump with stator coil protection sleeve |
| US20190040862A1 (en) * | 2017-08-01 | 2019-02-07 | Baker Hughes, A Ge Company, Llc | Permanent Magnet Pump |
| CN109538497A (en) * | 2018-12-06 | 2019-03-29 | 合肥恒大江海泵业股份有限公司 | A kind of built-in submersed three-flow pump of dry stator impeller |
| CN110030193A (en) * | 2019-05-16 | 2019-07-19 | 上海创科泵业制造有限公司 | Multi-stage shield pump and the water-carriage system for applying it |
| CN110953160A (en) * | 2019-11-28 | 2020-04-03 | 江苏大学 | Impeller built-in high-speed centrifugal pump |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113323080A (en) * | 2021-04-15 | 2021-08-31 | 朱福栋 | Efficient mechatronic water supply installation |
| CN114962320A (en) * | 2022-04-22 | 2022-08-30 | 浙江理工大学 | Self-lubricating cooling circulation system for shaftless drive deep sea mining mixing transportation pump |
| CN114962320B (en) * | 2022-04-22 | 2023-09-22 | 浙江理工大学 | Self-lubricating cooling circulation system for shaftless-driven deep sea mining mixed transportation pump |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112460031B (en) | 2022-07-22 |
| CN110953160A (en) | 2020-04-03 |
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