A kind of submersible cross-flow pump is provided with high-power submersible motor

Abstract

The application discloses a kind of submersible cross-flow pump with high-power submersible motor, comprising the following components: inner cylinder, the cylinder cavity is sealed cavity;Shaft, with inner cylinder rotary cooperation and its with inner cylinder Contact surface sealing arrangement;Rotor assembly, arranged in the cylinder cavity of inner cylinder and with shaft coaxial fixed;Stator assembly, arranged in the inner cylinder of inner cylinder and with rotor assembly electromagnetic induction cooperation to drive rotor assembly and shaft rotation;Outer cylinder, set in outer cylinder, outer cylinder and inner cylinder are supported and fixed by support plate;Support plate is at least provided with two groups along the axial direction of outer cylinder, outer cylinder, inner cylinder and each support plate are enclosed to form sealed cooling cavity, cooling cavity is communicated with the cylinder cavity of inner cylinder;Water pipe, through each support plate to pass through the cooling cavity of outer cylinder, water pipe two ends are communicated with external fluid;Driving assembly, gas in the cylinder cavity of inner cylinder enters cooling cavity and water pipe heat exchange.The application greatly improves the heat dissipation efficiency of submersible cross-flow pump with high-power submersible motor.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of fluid machinery, in particular to a large-power submersible motor matched with a submersible tubular pump. BACKGROUND

[0002] The submersible tubular pump is a horizontal pump type with low lift and large flow, which is widely used in water delivery field. The maximum power of the submersible motor matched with the existing submersible tubular pump is 1600kW. However, with the increase of demand, the power demand of the submersible motor matched with the submersible tubular pump will reach 5000kW. At this time, the original motor heat dissipation structure cannot meet the requirements. Under the operating condition of large power, the motor cannot effectively dissipate heat, and the rotor will expand, which may cause serious consequences of the friction between the stator and the rotor. Therefore, it is urgent to solve. SUMMARY

[0003] In order to avoid and overcome the technical problems existing in the prior art, the present application provides a large-power submersible motor matched with a submersible tubular pump. The present application greatly improves the heat dissipation efficiency of the large-power submersible motor matched with the submersible tubular pump.

[0004] To achieve the above-mentioned purpose, the present application provides the following technical scheme:

[0005] A large-power submersible motor matched with a submersible tubular pump, comprising the following components:

[0006] The inner cylinder has a sealed cavity;

[0007] The rotating shaft is in rotational cooperation with the inner cylinder and is sealed at the contact surface with the inner cylinder;

[0008] The rotor assembly is arranged in the cavity of the inner cylinder and is coaxially fixed with the rotating shaft;

[0009] The stator assembly is arranged in the inner cylinder of the inner cylinder and is in electromagnetic induction cooperation with the rotor assembly to drive the rotor assembly and the rotating shaft to rotate;

[0010] The outer cylinder is sleeved outside the inner cylinder, and the outer cylinder and the inner cylinder are supported and fixed by the support plates. The support plates are arranged in at least two groups along the axis of the outer cylinder. The outer cylinder, the inner cylinder and the support plates form a sealed cooling cavity, and the cooling cavity is in communication with the cavity of the inner cylinder;

[0011] The water pipe penetrates through each support plate to pass through the cooling cavity of the outer cylinder, and the two ends of the water pipe are in communication with the external fluid;

[0012] The driving assembly drives the gas in the cavity of the inner cylinder to enter the cooling cavity and exchange heat with the water pipe.

[0013] As a further scheme of the present application: the rotor assembly comprises a rotor core with rotor ventilation slots opened in the radial direction, and the stator assembly comprises a stator core with stator ventilation slots opened in the radial direction, the rotor ventilation slots and the stator ventilation slots are positionally corresponding so as to be connected to form a cooling passage for gas flow;

[0014] The inner cylinder is provided with an air inlet and an air outlet on the cylinder wall so that the gas in the cylinder cavity of the inner cylinder can flow back into the cylinder cavity of the inner cylinder through the air inlet, the cooling cavity and the air outlet in sequence; the inner circle of the rotor core is uniformly provided with rotor yokes in the circumferential direction and is connected with the rotating shaft through the rotor yokes, and the driving assembly is a centrifugal fan coaxially fixed on the rotor assembly.

[0015] As a further scheme of the present application: the position of the air inlet corresponds to the position of the stator ventilation slot, the air outlet has two groups and is arranged at the front and rear ends of the inner cylinder respectively, the centrifugal fan has two groups and is arranged at the front and rear ends of the rotor core respectively so as to correspond to the position of the stator coil, the fluid discharged from the air outlet passes through the stator coil through the distribution of the centrifugal fan, and then reaches the air inlet, and the other part passes through the gap between the rotor yokes and the cooling passage in sequence and then reaches the air inlet.

[0016] As a further scheme of the present application: the first air guide plates are arranged in the radial direction in the inner cylinder and correspond to the two centrifugal fans respectively, the first air guide plates are located between the end covers of the inner cylinder and the corresponding centrifugal fans, there is a gap between the plate end of the first air guide plate and the rotor yoke, and the corresponding centrifugal fan is installed at the gap.

[0017] As a further scheme of the present application: the outer cylinder is coaxially arranged with the inner cylinder, the cylinder wall of the inner cylinder is provided with second air guide plates extending to the direction of the cylinder wall of the outer cylinder in the radial direction, and the second air guide plates are located between the air inlet and the air outlet.

[0018] As a further scheme of the present application: the support plates are uniformly and spacedly arranged in the circumferential direction, and the fluid passage is formed between the adjacent support plates to pass the fluid through the outer cylinder.

[0019] As a further scheme of the present application: the support plates comprise struts arranged in the radial direction to connect and fix the outer cylinder and the inner cylinder, the support plates further comprise partition plates located at the front and rear ends of the outer cylinder and corresponding to the positions of the struts, the two partition plates, the two struts, the outer cylinder and the inner cylinder are matched with each other to form the cooling cavity; the contact surface between the partition plate and the inner cylinder is sealed by a sealing strip matched with the shape of the partition plate, and the contact surface between the partition plate and the cylinder wall of the outer cylinder is provided with a shock-absorbing pad.

[0020] As a further scheme of the present application: a water collecting tank is further arranged between the inner cylinder and the outer cylinder and located at the bottom of the inner cylinder, the water collecting tank is positionally avoided from the support plates, and the water collecting tank is communicated with the cylinder cavity of the inner cylinder.

[0021] As a further embodiment of the present invention: the outer cylinder is a split-type half-structure, and the power cable and control cable inside the inner cylinder are connected to the junction box outside the outer cylinder through a wiring conduit.

[0022] Compared with the prior art, the beneficial effects of the present invention are:

[0023] 1. The present invention provides a support plate between the inner cylinder and the outer cylinder. Since the support plate, the inner cylinder, and the outer cylinder can enclose a cooling chamber and the cooling chamber and the inner cylinder are in a connected state, when the motor is working, the gas in the inner cylinder can enter the cooling chamber and exchange heat with the pipe wall of the water pipe, thereby reducing the gas temperature in the inner cylinder. While supporting the inner cylinder, the support plate can also cool the gas in the inner cylinder through the water pipe, which greatly improves the heat dissipation efficiency of the submersible cross-flow pump equipped with a high-power submersible motor.

[0024] 2. In this invention, ventilation slots are radially opened on the stator core and rotor core. When the centrifugal fan rotates synchronously with the rotor core, it generates wind pressure, which allows the airflow to pass through the stator ventilation slots and rotor ventilation slots to deeply cool the stator and rotor. The reasonable arrangement of the air inlet and outlet positions allows the gas to circulate along a predetermined trajectory, further improving the heat dissipation efficiency.

[0025] 3. The centrifugal fan of the present invention can distribute the fluid during operation, so that the gas can generate two circulations. One part cools the stator coil and the other part cools the rotor and stator core, and finally converges at the air inlet to carry out the next circulation process.

[0026] 4. In this invention, a first air guide plate is arranged radially in the inner cylinder. While guiding the gas flow to the centrifugal fan, it also acts as a barrier to prevent leakage inside the motor and thus prevent water leakage. The centrifugal fan is arranged in the gap between the first air guide plate and the rotor armature, so that the rotor and stator core are protected from leakage by the two first air guide plates. A second air guide plate is also provided in the cooling chamber, which can extend the gas flow path, increase the contact time between the gas and the water pipe in the inner cylinder, and improve the gas cooling efficiency.

[0027] 5. This invention uses ribs to support the inner cylinder and closes the front and rear ends of the two sets of ribs with two sets of partition plates, thereby forming cooling chambers evenly arranged along the circumference of the outer cylinder. There are gaps between adjacent cooling chambers to allow water to flow normally through the outer cylinder. With the synergistic effect of sealing strips and shock-absorbing pads, the sealing performance is guaranteed while also buffering mechanical vibration. The water collection tank can accumulate any leakage that may occur in the inner cylinder. Attached Figure Description

[0028] Fig. 1 This is a schematic diagram of the structure of the present invention.

[0029] Fig. 2 This is a side view of the present invention.

[0030] Fig. 3 This is a schematic diagram of the assembly of the rotating shaft and the rotor armature.

[0031] In the picture:

[0032] 1. Inner cylinder;

[0033] 11. Rotor core; 111. Rotor ventilation slot; 112. Rotor radial arm; 113. Centrifugal fan;

[0034] 12. Stator core; 121. Stator ventilation slot; 122. Stator coil;

[0035] 13. Rotating shaft; 14. First air guide plate;

[0036] 2. Outer cylinder; 21. Water pipe; 22. Support plate;

[0037] 221. Partition plate; 222. Supporting ribs; 223. Sealing strip; 224. Shock-absorbing pads;

[0038] 23. Second air guide plate; 24. Air outlet; 25. Air inlet; 26. Water collection tank; 27. Junction box. Detailed Implementation

[0039] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0040] Please see Figs. 1-3 In this embodiment of the invention, a submersible axial flow pump equipped with a high-power submersible motor includes an inner cylinder 1 and an outer cylinder 2 coaxially sleeved outside the inner cylinder 1. The inner cylinder 1 serves as the motor cavity and is internally sealed. An annular gap exists between the inner cylinder 1 and the outer cylinder 2 to allow water to flow through.

[0041] The outer cylinder 2 has a split structure, which is multi-lobed and can be assembled and fixed into shape.

[0042] Support plates 22 are evenly arranged radially between the outer cylinder 2 and the inner cylinder 1 to connect and support the inner cylinder 1. There is a hollow area between adjacent support plates 22 to allow water to flow normally through the outer cylinder 2.

[0043] Each set of support plates 22 includes two rows of radially arranged support ribs 222. The length of the support ribs 222 matches the length of the outer cylinder 2. The gaps at the front and rear ends of the two rows of support ribs 222 are closed by partition plates 221, so that the two sets of partition plates 221, the two sets of support ribs 222, the outer cylinder wall of the inner cylinder 1 and the inner cylinder wall of the outer cylinder 2 can be enclosed to form a cooling cavity arranged along the length direction of the outer cylinder 2.

[0044] The partition plate 221 is sealed to the inner cylinder 1 by a sealing strip 223, and a shock-absorbing pad 224 is provided between the partition plate 221 and the outer cylinder. The combination of the sealing strip 223 and the shock-absorbing pad 224 allows the cooling chamber to be in a sealed state.

[0045] Several sets of water pipes 21 pass through the front and rear partition plates 221 in sequence along the axial direction of the outer cylinder 2, so that the water flow on one side of the outer cylinder 2 can also flow to the other side of the outer cylinder 2 through the water pipes 21, and the water pipes 21 pass through the cooling chamber.

[0046] The power cable and control cable inside the inner cylinder 1 are connected to the junction box 27 outside the outer cylinder 2 through the wiring conduit and are connected to the power source.

[0047] The inner cylinder 1 is sealed at both ends by end caps. The rotating shaft 13 is coaxially arranged inside the inner cylinder 1, with one end of its shaft extending through the inner cylinder 1 to the outside of the inner cylinder 1 to serve as a power shaft. Bearings are provided at the end caps at both ends of the inner cylinder 1 to form a rotational fit with the rotating shaft 13. A mechanical seal is provided at the contact surface between the rotating shaft 13 and the inner cylinder 1.

[0048] The rotor core 11 is sleeved on the outside of the rotating shaft 13, and its inner ring is provided with rotor webs 112 at radial intervals, so that the rotor webs 112 are coaxially fixed with the rotating shaft 13, and there is a gap between adjacent rotor webs 112.

[0049] The inner wall of the inner cylinder 1 is also fixed with a fixing plate. The stator core 12 is coaxially sleeved outside the rotor core 11, so that electromagnetic induction can be generated after energization to drive the rotating shaft 13 to rotate.

[0050] Rotor ventilation slots 111 are arranged radially at uniform intervals on the rotor core 11, and stator ventilation slots 121 are arranged radially at uniform intervals on the stator core 12. The rotor ventilation slots 111 and stator ventilation slots 121 are positioned correspondingly and can be connected to form a cooling passage.

[0051] The inner cylinder 1 has an air inlet 25 in the middle of the cylinder wall that communicates with the cooling chamber. One end of the cooling passage corresponds to the position of the air inlet 25, and the other end communicates with the gap between the adjacent rotor axle 112.

[0052] Centrifugal fans 113 are installed at both ends of the rotor core 11. When the centrifugal fans 113 rotate synchronously with the rotor core 11, they can generate wind pressure, thereby allowing the gas in the inner cylinder 1 to circulate.

[0053] The inner cylinder 1 has air outlets 24 at both ends of its cylinder wall. A second air guide plate 23 extending from the inner cylinder 1 cylinder wall to the outer cylinder 2 cylinder wall is provided between the air outlets 24 and the air inlet 25, thereby extending the flow time of the gas in the cooling chamber.

[0054] The fixing plate used to support the stator core 12 has a first air guide plate 14 arranged radially at the end of the plate. The stator core 12 has stator coils 122 at both ends. The first air guide plate 14 is located between the air outlet 24 and the stator coils 122.

[0055] There is a gap between the first air guide plate 14 and the rotor armature 112, and the centrifugal fan 113 is arranged in this gap. There is also a gap between the first air guide plate 14 and the end cover of the inner cylinder 1, which allows airflow to be guided from the air outlet 24 to the centrifugal fan 113.

[0056] When the centrifugal fan 113 is working, it splits the airflow from the outlet 24 into two streams. One stream passes through the stator coil 122 and reaches the inlet 25, while the other stream passes through the gap between adjacent rotor armatures 112 and the cooling passage before reaching the inlet 25. The gas inside the inner cylinder 1 enters the cooling chamber through the inlet 25 and exchanges heat with the wall of the water pipe 21. Then, it flows back from the outlet 24 into the inner cylinder 1, thus achieving gas circulation.

[0057] A water collection tank 26 is provided below the inner cylinder 1 and communicates with the outer cylinder 2. The water collection tank 26 and the inner cylinder 1 are in a communication state, and its position is directly below the first air guide plate 14.

[0058] After the support plate is installed, it forms a cooler and is sealed to the inner cylinder 1 through a flange, forming a detachable structure, thereby reducing the volume and weight of individual components and facilitating transportation and installation.

[0059] The basic principles of this application have been described above with reference to specific embodiments. However, it should be noted that the advantages, benefits, and effects mentioned in this application are merely examples and not limitations, and should not be considered as essential features of each embodiment of this application. Furthermore, the specific details disclosed above are for illustrative and facilitative purposes only, and are not limitations. These details do not limit the application to the necessity of employing the aforementioned specific details for implementation.

[0060] The block diagrams of devices, apparatuses, devices, and systems involved in this application are merely illustrative examples and are not intended to require or imply that they must be connected, arranged, or configured in the manner shown in the block diagrams. As those skilled in the art will recognize, these devices, apparatuses, devices, and systems can be connected, arranged, and configured in any manner. Words such as “comprising,” “including,” “having,” etc., are open-ended terms meaning “including but not limited to,” and are used interchangeably with them. The terms “or” and “and” as used herein refer to the terms “and / or,” and are used interchangeably with them unless the context clearly indicates otherwise. The term “such as” as used herein refers to the phrase “such as but not limited to,” and is used interchangeably with it.

[0061] It should also be noted that in the apparatus, equipment, and methods of this application, the components or steps can be disassembled and / or recombined. These disassemblies and / or recombinations should be considered as equivalent solutions of this application.

[0062] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use this application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein can be applied to other aspects without departing from the scope of this application. Therefore, this application is not intended to be limited to the aspects shown herein, but rather to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0063] The above description has been given for purposes of illustration and description. Furthermore, this description is not intended to limit the embodiments of this application to the forms disclosed herein. Although numerous exemplary aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, alterations, additions, and sub-combinations thereof.

Claims

1. A submersible axial flow pump equipped with a high-power submersible motor, characterized in that, It includes the following components: Inner cylinder (1), its cavity is a sealed cavity; The rotating shaft (13) is rotatably coupled with the inner cylinder (1) and its contact surface with the inner cylinder (1) is sealed. The rotor assembly is arranged inside the inner cylinder (1) and fixed coaxially with the rotating shaft (13); The stator assembly is arranged inside the inner cylinder (1) and electromagnetically engages with the rotor assembly to drive the rotor assembly and the shaft (13) to rotate. The outer cylinder (2) is fitted outside the inner cylinder (1), and the outer cylinder (2) and the inner cylinder (1) are supported and fixed by a support plate (22); at least two sets of support plates (22) are provided along the axial direction of the outer cylinder (2), and the outer cylinder (2), the inner cylinder (1) and each support plate (22) enclose a sealed cooling chamber, which is connected to the cylinder cavity of the inner cylinder (1); Water pipe (21) passes through each support plate (22) and thus through the cooling chamber of the outer cylinder (2). Both ends of the water pipe (21) are connected to the external fluid. The drive assembly drives the gas in the inner cylinder (1) cavity to enter the cooling chamber and exchange heat with the water pipe (21); The support plates (22) are evenly spaced along the circumference, and fluid channels are formed between adjacent support plates (22) to allow fluid to pass through the outer cylinder (2). The support plate (22) includes a support rib (222) arranged radially to connect and fix the outer cylinder (2) and the inner cylinder (1). The support plate (22) also includes a partition plate (221) located at the front and rear ends of the outer cylinder (2) and corresponding to the position of the support rib (222). The two partition plates (221), the two support ribs (222), the outer cylinder (2) and the inner cylinder (1) cooperate with each other to form a cooling cavity. The contact surface between the partition plate (221) and the inner cylinder (1) is sealed by a sealing strip (223) that matches the shape of the partition plate (221). A shock-absorbing pad (224) is provided at the contact surface between the partition plate (221) and the cylinder wall of the outer cylinder (2). The rotor assembly includes a rotor core (11) with a rotor ventilation slot (111) in the radial direction, and the stator assembly includes a stator core (12) with a stator ventilation slot (121) in the radial direction. The rotor ventilation slot (111) and the stator ventilation slot (121) are positioned corresponding to each other and can be connected to form a cooling passage for gas circulation. The inner cylinder (1) has an air inlet (25) and an air outlet (24) on its wall so that the gas in the inner cylinder (1) can flow back into the inner cylinder (1) after passing through the air inlet (25), the cooling chamber and the air outlet (24) in sequence. The rotor core (11) has rotor axes (112) evenly arranged around its inner ring and connected to the rotating shaft (13) through the rotor axes (112). The drive assembly is a centrifugal fan (113) coaxially fixed on the rotor assembly.

2. The submersible axial flow pump equipped with a high-power submersible motor according to claim 1, characterized in that, The position of the air inlet (25) corresponds to the position of the stator ventilation slot (121). There are two sets of air outlets (24) and they are respectively located at the front and rear ends of the inner cylinder (1). There are two sets of centrifugal fans (113) and they are respectively located at the front and rear ends of the rotor core (11) so as to correspond to the position of the stator coil (122). The fluid discharged from the air outlet (24) is distributed by the centrifugal fan (113). Part of it passes through the stator coil (122) and reaches the air inlet (25). The other part passes through the gap between each rotor armature (112) and the cooling passage in sequence and reaches the air inlet (25).

3. A submersible axial flow pump equipped with a high-power submersible motor according to claim 2, characterized in that, The inner cylinder (1) is provided with a first air guide plate (14) in the radial direction, which is respectively located in the position of the two centrifugal fans (113). The first air guide plate (14) is located between the end cover of the inner cylinder (1) and the corresponding centrifugal fan (113). There is a gap between the plate end of the first air guide plate (14) and the rotor armature (112), and the corresponding centrifugal fan (113) is installed in the gap.

4. A submersible axial flow pump equipped with a high-power submersible motor according to claim 2, characterized in that, The outer cylinder (2) and the inner cylinder (1) are arranged coaxially. The inner cylinder (1) has a second air guide plate (23) extending radially toward the outer cylinder (2) wall. The second air guide plate (23) is located between the air inlet (25) and the air outlet (24).

5. A submersible axial flow pump equipped with a high-power submersible motor according to claim 1 or 2, characterized in that, A water collection tank (26) located at the bottom of the inner cylinder (1) is also provided between the inner cylinder (1) and the outer cylinder (2). The water collection tank (26) is positioned away from the support plate (22) and is connected to the cavity of the inner cylinder (1).

6. A submersible axial flow pump equipped with a high-power submersible motor according to claim 1 or 2, characterized in that, The outer cylinder (2) is a split-type half structure. The power cable and control cable inside the inner cylinder (1) are connected to the junction box (27) outside the outer cylinder (2) through the wiring pipe.

Images