CN-115360860-B - High-power submersible motor matched with submersible through-flow pump

CN115360860BCN 115360860 BCN115360860 BCN 115360860BCN-115360860-B

Abstract

The invention discloses a high-power submersible motor for a submersible through-flow pump, which comprises an inner cylinder, a rotating shaft, a rotor assembly, a stator assembly, an outer cylinder, a supporting plate, a water pipe, a driving assembly and a driving assembly, wherein a cylinder cavity of the inner cylinder is a sealing cavity, the rotating shaft is in rotary fit with the inner cylinder and is in sealing arrangement with a contact surface of the inner cylinder, the rotor assembly is arranged in the cylinder cavity of the inner cylinder and is coaxially fixed with the rotating shaft, the stator assembly is arranged in the inner cylinder of the inner cylinder and is in electromagnetic induction fit with the rotor assembly so as to drive the rotor assembly and the rotating shaft to rotate, the outer cylinder is sleeved outside the inner cylinder, the outer cylinder and the inner cylinder are supported and fixed through the supporting plate, at least two groups of supporting plates are arranged along the axial direction of the outer cylinder, the inner cylinder and the supporting plates are enclosed to form a sealed cooling cavity, the cooling cavity is communicated with the cylinder cavity of the inner cylinder, the water pipe penetrates through the supporting plates so that two ends of the water pipe are in fluid communication with the outside, and the driving assembly drives gas in the cylinder cavity to enter the cooling cavity to the cooling cavity and exchange heat with the water pipe. The invention greatly improves the heat dissipation efficiency of the high-power submersible motor matched with the submersible through-flow pump.

Inventors

HU WEI
JIN LEI
ZHU QINGLONG
ZHAO WEILONG
WANG CHENGCHENG
XU YUXIANG
SU ZIHAN
QIAN LEI

Assignees

合肥恒大江海泵业股份有限公司

Dates

Publication Date: 20260512
Application Date: 20220817

Claims (6)

1. The high-power submersible motor matched with the submersible through-flow pump is characterized by comprising the following components: an inner cylinder (1), the cylinder cavity of which is a sealing cavity; a rotating shaft (13) which is in rotary fit with the inner cylinder (1) and is in sealing arrangement with the contact surface of the inner cylinder (1); The rotor assembly is arranged in the cylinder cavity of the inner cylinder (1) and is coaxially fixed with the rotating shaft (13); The stator assembly is arranged in the cylinder cavity of the inner cylinder (1) and is matched with the rotor assembly in an electromagnetic induction way so as to drive the rotor assembly and the rotating shaft (13) to rotate; the outer cylinder (2) is sleeved outside the inner cylinder (1), the outer cylinder (2) and the inner cylinder (1) are supported and fixed through the supporting plates (22), the supporting plates (22) are at least provided with two groups along the axial direction of the outer cylinder (2), the inner cylinder (1) and the supporting plates (22) are enclosed to form a sealed cooling cavity, and the cooling cavity is communicated with the cylinder cavity of the inner cylinder (1); A water pipe (21) penetrating each support plate (22) so as to pass through the cooling cavity of the outer cylinder (2), and two ends of the water pipe (21) are in fluid communication with the outside; the driving assembly drives the gas in the cylinder cavity of the inner cylinder (1) to enter the cooling cavity for heat exchange with the water pipe (21); the support plates (22) are uniformly arranged at intervals along the circumferential direction, and fluid channels are formed between adjacent support plates (22) for fluid to pass through the outer cylinder (2); The supporting plate (22) comprises supporting ribs (222) which are arranged along the radial direction and used for connecting and fixing the outer cylinder (2) and the inner cylinder (1), the supporting plate (22) also comprises separating plates (221) which are positioned at the front end and the rear end of the outer cylinder (2) and correspond to the positions of the supporting ribs (222), the two separating plates (221), the two supporting ribs (222), the outer cylinder (2) and the inner cylinder (1) are matched with each other so as to form a cooling cavity in a surrounding way, the contact surface of the separating plates (221) and the inner cylinder (1) is sealed by sealing strips (223) which are matched with the shape of the separating plates (221), and the contact surface of the separating plates (221) and the wall of the outer cylinder (2) is provided with damping pads (224); The rotor assembly comprises a rotor core (11) provided with rotor ventilation grooves (111) along the radial direction, the stator assembly comprises a stator core (12) provided with stator ventilation grooves (121) along the radial direction, and the rotor ventilation grooves (111) correspond to the stator ventilation grooves (121) in position so as to be communicated with each other to form a cooling passage for gas circulation; An air inlet (25) and an air outlet (24) are formed in the wall of the inner cylinder (1) so that air in the cylinder cavity of the inner cylinder (1) can flow back into the cylinder cavity of the inner cylinder (1) after passing through the air inlet (25), the cooling cavity and the air outlet (24) in sequence, rotor frame iron (112) is uniformly arranged in the inner ring of the rotor core (11) along the circumferential direction and connected with the rotating shaft (13) through the rotor frame iron (112), and the driving assembly is a centrifugal fan (113) coaxially fixed on the rotor assembly.
2. The submersible through pump with high power submersible motor according to claim 1, wherein the position of the air inlet (25) corresponds to the position of the stator ventilation groove (121), the air outlet (24) is divided into two groups, which are respectively arranged at the front and rear ends of the inner cylinder (1), the centrifugal fan (113) is divided into two groups, which are respectively arranged at the front and rear ends of the rotor core (11) so as to correspond to the position of the stator coil (122), and the fluid discharged from the air outlet (24) reaches the air inlet (25) after passing through the stator coil (122) through a part of the distribution of the centrifugal fan (113), and the other part sequentially passes through the gap between the rotor frame irons (112) and the cooling passage to reach the air inlet (25).
3. The submersible through-flow pump with high-power submersible motor according to claim 2, wherein the inner cylinder (1) is radially provided with first air deflectors (14) which are respectively corresponding to the two centrifugal fans (113), the first air deflectors (14) are positioned between the end cover of the inner cylinder (1) and the corresponding centrifugal fans (113), a gap exists between the plate end of the first air deflectors (14) and the rotor frame iron (112), and the corresponding centrifugal fans (113) are installed at the gap.
4. The submersible through-flow pump with high-power submersible motor according to claim 2, wherein the outer cylinder (2) and the inner cylinder (1) are coaxially arranged, a second air deflector (23) extending towards the cylinder wall direction of the outer cylinder (2) is radially arranged on the cylinder wall of the inner cylinder (1), and the second air deflector (23) is positioned between the air inlet (25) and the air outlet (24).
5. The submersible through-flow pump with high-power submersible motor according to claim 1 or 2, characterized in that a water collecting tank (26) positioned at the bottom of the inner cylinder (1) is further arranged between the inner cylinder (1) and the outer cylinder (2), the water collecting tank (26) is avoided from the position of the supporting plate (22), and the water collecting tank (26) is communicated with a cylinder cavity of the inner cylinder (1).
6. The submersible through-flow pump with high-power submersible motor according to claim 1 or 2, wherein the outer cylinder (2) is of a half structure capable of being split, and a power cable and a control cable in the inner cylinder (1) are connected into a junction box (27) outside the outer cylinder (2) after passing through a wire connection pipe.

Description

High-power submersible motor matched with submersible through-flow pump Technical Field The invention relates to the field of fluid machinery, in particular to a high-power submersible motor matched with a submersible through-flow pump. Background The submersible through-flow pump is a low-lift large-flow horizontal pump and is widely applied to the field of water conservancy transportation, the maximum power of the submersible motor matched with the conventional submersible through-flow pump is 1600kW, but along with the increase of the demand, the power demand of the submersible motor matched with the conventional submersible through-flow pump reaches 5000kW, at the moment, the original motor heat dissipation structure cannot meet the demand, the motor cannot effectively dissipate heat under the high-power operation working condition, the rotor can expand, and serious effects of stator-rotor friction can be caused, so that the submersible through-flow pump is needed to be solved. Disclosure of Invention In order to avoid and overcome the technical problems in the prior art, the invention provides a high-power submersible motor matched with a submersible through-flow pump. The invention greatly improves the heat dissipation efficiency of the high-power submersible motor matched with the submersible through-flow pump. In order to achieve the above purpose, the present invention provides the following technical solutions: a high-power submersible motor matched with a submersible through-flow pump comprises the following components: An inner cylinder, the cylinder cavity of which is a sealing cavity; The rotating shaft is in rotary fit with the inner cylinder and is in sealing arrangement with the contact surface of the inner cylinder; The rotor assembly is arranged in the cylinder cavity of the inner cylinder and is coaxially fixed with the rotating shaft; The stator assembly is arranged in the inner cylinder of the inner cylinder and is matched with the rotor assembly in an electromagnetic induction way so as to drive the rotor assembly and the rotating shaft to rotate; the support plate is axially provided with at least two groups along the outer cylinder, the inner cylinder and each support plate are enclosed to form a sealed cooling cavity, and the cooling cavity is communicated with the cylinder cavity of the inner cylinder; The water pipe penetrates through each supporting plate so as to pass through the cooling cavity of the outer barrel, and two ends of the water pipe are in fluid communication with the outside; The driving assembly drives the gas in the inner cylinder cavity to enter the cooling cavity for heat exchange with the water pipe. The rotor assembly comprises a rotor core with rotor ventilation grooves formed in the radial direction, the stator assembly comprises a stator core with stator ventilation grooves formed in the radial direction, and the rotor ventilation grooves correspond to the stator ventilation grooves in position so as to be communicated with a cooling passage for air circulation; The inner ring of the rotor iron core is uniformly provided with rotor width iron along the circumferential direction and is connected with the rotating shaft through the rotor width iron, and the driving component is a centrifugal fan coaxially fixed on the rotor component. As a still further proposal of the invention, the positions of the air inlets correspond to the positions of the stator ventilation slots, the air outlets are divided into two groups and are respectively arranged at the front end and the rear end of the inner cylinder, the centrifugal fans are divided into two groups and are respectively arranged at the front end and the rear end of the rotor iron core so as to correspond to the positions of the stator coils, and the fluid discharged from the air outlets reaches the air inlets after passing through the stator coils through one part of the distribution of the centrifugal fans, and the other part of the fluid sequentially passes through gaps among the rotor coils and the cooling passages and then reaches the air inlets. As a still further proposal of the invention, the inner cylinder is radially provided with first air deflectors which are respectively corresponding to the two centrifugal fans, the first air deflectors are positioned between the end cover of the inner cylinder and the corresponding centrifugal fans, a gap exists between the plate end of the first air deflectors and the rotor spoke iron, and the corresponding centrifugal fans are arranged at the gap. As a still further proposal of the invention, the outer cylinder and the inner cylinder are coaxially arranged, the cylinder wall of the inner cylinder is radially provided with a second air deflector extending towards the cylinder wall direction of the outer cylinder, and the second air deflector is positioned between the air inlet and the air outlet. As a still further proposal of the invention, the supporting plat