A built-in circulating heat dissipation structure for a pump and the pump thereof

Abstract

This invention relates to a built-in circulating heat dissipation structure for a pump. The pump includes at least a liquid-separating inner sleeve, an end cap that connects to the port of the liquid-separating inner sleeve, a main shaft, a magnetic core rotor, a pump chamber, and a pump impeller. The magnetic core rotor has at least one hollow flow channel penetrating both ends, and a gap is formed between the outer wall of the magnetic core rotor and the inner wall of the liquid-separating inner sleeve. The end cap has at least one set of through holes communicating with the pump chamber and the interior of the liquid-separating inner sleeve. The hollow flow channel of the magnetic core rotor, the gap between the outer wall of the magnetic core rotor and the inner wall of the liquid-separating inner sleeve, the through holes, and the pump chamber form a heat dissipation channel for liquid flow. This invention's built-in circulating heat dissipation channel and its structure, with an internal liquid flow space communicating with the pump chamber and a power structure that forcibly propels the liquid flow, significantly enhances the pump's heat dissipation and self-cleaning effects, thereby ensuring the stability of the pump and motor operation, extending their service life, and allowing for greater power output from the pump and motor, thus better meeting market needs.

Description

Technical fields:

[0001] This invention relates to the field of pump and motor equipment technology, and specifically to a pump with a built-in circulating heat dissipation structure and such pump. Background technology:

[0002] Pumps have a wide range of applications and come in many types, such as brushless magnetic drive submersible pumps. Brushless magnetic drive submersible pumps use a magnetic core as the rotor assembly and windings as the stator assembly. During operation, the magnetic core, acting as the rotor, generates a significant amount of heat. In current technology, this heat can only be dissipated through contact between the main shaft and the end cover / pump casing, or through other external means. Therefore, the heat dissipation efficiency is low, and the overall heat dissipation performance is poor. This is a major factor contributing to the pump's limitations in power output, lifespan, and stability.

[0003] Chinese invention patent publication number CN111622960A discloses "A brushless magnetic drive submersible pump with built-in water cooling system". Although the submersible pump has a built-in heat dissipation space structure, it only relies on water flow contact heat dissipation at the gap of the outer surface of the rotor. Although the heat dissipation effect is improved to a certain extent, there is still room for improvement. Summary of the Invention:

[0004] The purpose of this invention is to overcome the above-mentioned shortcomings of the prior art and provide a built-in circulating heat dissipation structure for a pump and such a pump, which generates further forced liquid flow power and heat exchange, and further improves the heat dissipation performance of the pump.

[0005] The technical solution adopted in this invention is: a built-in circulating heat dissipation structure for a pump, the pump having at least a liquid-isolating inner sleeve, an end cap that connects to the port of the liquid-isolating inner sleeve, a main shaft mounted between the end cap and the inner end of the liquid-isolating inner sleeve via a bearing assembly, and a magnetic core rotor mounted inside the liquid-isolating inner sleeve and connected to the main shaft. The outer end of the main shaft extends out of the end cap and is located in a pump cavity outside the end cap and is connected to a pump impeller. The magnetic core rotor has at least one hollow flow channel penetrating both ends, and a gap is formed between the outer wall of the magnetic core rotor and the inner wall of the liquid-isolating inner sleeve. The end cap has at least one set of through holes communicating with the pump cavity and the interior of the liquid-isolating inner sleeve. The hollow flow channel of the magnetic core rotor, the gap between the outer wall of the magnetic core rotor and the inner wall of the liquid-isolating inner sleeve, the through holes, and the pump cavity form a heat dissipation channel for liquid flow.

[0006] Furthermore, an auxiliary impeller is installed at the inner end of the magnetic core rotor, and the auxiliary impeller rotates synchronously with the magnetic core rotor.

[0007] Furthermore, the direction of the auxiliary impeller is such that the liquid flows from the space between the inner end face of the magnetic core rotor and the inner end of the liquid-blocking inner sleeve into the hollow flow channel of the magnetic core rotor, and then flows to the outer end of the magnetic core rotor and into the pump chamber through the through hole; of course, the auxiliary impeller can also be installed in reverse.

[0008] Furthermore, an annular baffle is formed extending inward from the inner end face of the end cap. The end of the annular baffle is close to the outer end face of the magnetic core rotor. The annular baffle divides the through holes on the end cap into two groups. One group of first through holes is distributed in an annular pattern on the inner side of the annular baffle and is opposite to the hollow flow channel of the magnetic core rotor. The other group of second through holes is distributed in an annular pattern on the outer side of the annular baffle and is opposite to the gap.

[0009] Furthermore, several radial baffles are formed along the inner and outer sides of the annular baffle, respectively.

[0010] Furthermore, the hollow flow channel of the magnetic core rotor is a number of fan-shaped flow channels evenly distributed along a direction parallel to the main shaft axis, and several blades are formed between the fan-shaped flow channels.

[0011] Furthermore, the outer end face of the magnetic core rotor is formed with a first annular concave surface, and the end of the annular baffle extends into the interior of the first annular concave surface and approaches the inner bottom surface of the first annular concave surface.

[0012] Furthermore, the inner end face of the magnetic core rotor is formed with a second annular concave surface, and the auxiliary impeller is disposed in the second annular concave surface.

[0013] The present invention also provides a pump having the above-described built-in circulating heat dissipation structure.

[0014] Specifically, the pump also includes a pump chamber housing mounted on the outside of the end cover to form a pump chamber, a pump body housing mounted to the pump chamber housing and located outside the liquid-separating inner sleeve, a pump body outer cover mounted to the end of the pump body housing, and a winding stator mounted on the outer wall of the liquid-separating inner sleeve.

[0015] The pump of this invention features a built-in circulating heat dissipation channel and its structure, which has an internal liquid flow space communicating with the pump chamber and a power structure that forces the liquid to flow. This significantly enhances the pump's heat dissipation and self-cleaning effects, thereby ensuring the stability of the pump and motor operation and extending their service life. Therefore, under similar conditions, using the heat dissipation structure of this invention allows for further increases in the power of the pump and motor, thus better meeting market needs. Attached image description:

[0016] Figure 1 This is a schematic cross-sectional view of the pump of the present invention;

[0017] Figure 2 This is a three-dimensional sectional view of the pump of the present invention;

[0018] Figure 3 This is a cross-sectional view of the present invention from another angle. Detailed implementation method:

[0019] like Figure 1 , Figure 2 , Figure 3 As shown, the present invention describes a built-in circulating heat dissipation structure for a pump. The pump has at least a liquid-isolating inner sleeve 1, an end cover 2 that connects to the port of the liquid-isolating inner sleeve 1, a main shaft 3 mounted between the end cover 2 and the inner end of the liquid-isolating inner sleeve 1 via a bearing assembly 31, and a magnetic core rotor 4 mounted inside the liquid-isolating inner sleeve 1 and connected to the main shaft 3. The outer end of the main shaft 3 extends out of the pump cavity 50 located outside the end cover 2 and is connected to a pump impeller 5. The magnetic core rotor 4 has at least one hollow flow channel 401 extending through both ends, and a gap 101 is formed between the outer wall of the magnetic core rotor 4 and the inner wall of the liquid-isolating inner sleeve 1. The end cover 2 has... At least one set of through holes 20 are provided to connect the pump chamber 50 and the interior of the liquid-separating inner sleeve 1; the hollow flow channel 401 of the magnetic core rotor 4, the gap 101 between the outer wall of the magnetic core rotor 4 and the inner wall of the liquid-separating inner sleeve 1, the through holes 50 and the pump chamber 20 form a heat dissipation channel for liquid flow; when the pump is immersed in liquid, the liquid in the pump chamber 50 can enter the interior of the liquid-separating inner sleeve 1 through the through holes 20 and occupy its internal space. When the magnetic core rotor 4 and the main shaft 3 rotate, they disturb the liquid and achieve dynamic flow and heat exchange with the liquid in the pump chamber 50 through the through holes 20, thereby improving the heat dissipation effect of the magnetic core rotor 4 and the entire pump.

[0020] Furthermore, an auxiliary impeller 41 is installed at the inner end of the magnetic core rotor 4. The auxiliary impeller 41 rotates synchronously with the magnetic core rotor 4, and the direction of the auxiliary impeller 41 is such that the liquid flows from the space between the inner end face of the magnetic core rotor 4 and the inner end of the liquid-separating inner sleeve 1 into the hollow flow channel 401 of the magnetic core rotor 4, and then flows to the outer end of the magnetic core rotor 4 and flows into the pump chamber 50 through the through hole 20 of the end cover 2. On the other hand, the liquid in the pump chamber 50 also enters the inner side of the end cover 2 through the through hole 20 and flows through the space between the outer wall of the magnetic core rotor 4 and the liquid-separating inner sleeve 1. The gap 101 enters the space between the inner end face of the magnetic core rotor 4 and the inner end of the liquid-blocking inner sleeve 1, thereby forming a dynamic internal circulation heat dissipation effect; that is, the auxiliary impeller 4 generates a forced flow thrust on the liquid, which forces the liquid to flow and enhances the heat dissipation effect; in addition, the liquid flow formed by the high-speed rotation of the magnetic core rotor 4 and the auxiliary impeller 41 has a strong flushing effect on the inside of the magnetic core rotor 4 and the inside of the liquid-blocking inner sleeve 1, thereby avoiding the accumulation of dirt such as mud and sand, improving the pump's self-cleaning effect and the safety and stability of operation, and extending the pump's service life;

[0021] Of course, the auxiliary impeller 41 can also be installed in the opposite direction, so that the direction of liquid flow is opposite to the arrow shown in the figure, and the two have the same heat dissipation effect.

[0022] Furthermore, an annular baffle 21 extends inward from the inner end face of the end cap 2, with its end approaching the outer end face of the magnetic core rotor 4. This annular baffle 21 divides the through holes 20 on the end cap 2 into two groups. One group of first through holes 201 is annularly distributed on the inner side of the annular baffle 21, opposite the hollow flow channel 401 of the magnetic core rotor 4. The other group of second through holes 202 is annularly distributed on the outer side of the annular baffle 21, opposite the gap 101. This annular baffle 21 further isolates the space at the outer end of the magnetic core rotor 4, such as... Figure 1 As shown by the middle arrow, when the liquid flows, the liquid enters the inner side of the end cover 2 from the second through hole 202 on the outside and enters the inner end of the magnetic core rotor 4 along the gap 101. Then it enters the hollow flow channel 401 inside the magnetic core rotor 4 through the auxiliary impeller 41, which carries away the heat of the magnetic core rotor 4. Then it flows into the pump chamber 50 through the first through hole 201 on the inner side of the annular baffle 21, where it exchanges heat with the liquid inside the pump chamber 50, thus forming a better internal circulation heat dissipation channel.

[0023] Furthermore, several radial baffles 22 are formed along the inner and outer sides of the annular baffle 21. The radial baffles 22 can enhance the structural strength of the end cap 2. On the other hand, the radial baffles 22 on the inner side separate the first through hole 201, and the radial baffles 22 on the outer side separate the second through hole 202, resulting in better liquid flow directionality.

[0024] Furthermore, combined Figure 3 As shown, the hollow flow channel 401 of the magnetic core rotor 4 is a number of fan-shaped flow channels evenly distributed along a direction parallel to the axis of the main shaft 3, and a number of blades 42 are formed between the fan-shaped flow channels. In this embodiment, six fan-shaped hollow flow channels 401 are formed inside the magnetic core rotor 4, and six blades 42 are formed at the same time. The formed blades 41 are used to further generate the power of forced liquid flow, and at the same time increase the surface area of ​​the magnetic core rotor 4 and the heat dissipation area in contact with the liquid, thereby further enhancing the heat dissipation effect.

[0025] Furthermore, the outer end face of the magnetic core rotor 4 is formed with a first annular concave surface 43, and the end of the annular baffle 21 extends into the interior of the first annular concave surface 43 and approaches the inner bottom surface of the first annular concave surface 43. This can further enhance the isolation effect of the flow channel, reduce the mixing of liquid inside and outside the annular baffle 21, and make the circulation heat dissipation effect better.

[0026] Furthermore, the inner end face of the magnetic core rotor 4 is formed with a second annular concave surface 44, and the auxiliary impeller 41 is disposed in the second annular concave surface 44. This can prevent the auxiliary impeller 41 from protruding from the inner end face of the magnetic core rotor 4, so that the liquid forced flow is more concentrated towards the hollow flow channel 401 of the magnetic core rotor 4. Otherwise, if the auxiliary impeller protrudes from the inner end face of the magnetic core rotor, some liquid will diffuse into the external space, forming mixed flow and weakening the heat dissipation effect.

[0027] The present invention also provides a pump having the above-described built-in circulating heat dissipation structure.

[0028] Specifically, this type of pump also includes a pump chamber housing 51 installed on the outside of the end cover 2 to form a pump chamber 50, a pump body housing 6 installed and connected to the pump chamber housing 51 and located outside the liquid-separating inner sleeve 1, a pump body outer cover 61 installed and connected to the end of the pump body housing 6, and a winding stator 7 installed on the outer wall of the liquid-separating inner sleeve 1 and inside the pump body housing 6. Its specific working principle will not be described in detail.

[0029] The pump of this invention features a built-in circulating heat dissipation channel and its structure, which has an internal liquid flow space communicating with the pump chamber and a power structure that forces the liquid to flow. This significantly enhances the pump's heat dissipation and self-cleaning effects, thereby ensuring the stability of the pump and motor operation and extending their service life. Therefore, under similar conditions, using the heat dissipation structure of this invention allows for further increases in the power of the pump and motor, thus better meeting market needs.

[0030] It is understood that the above embodiments are merely exemplary implementations used to illustrate the principles of the present invention, and the present invention is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. A built-in circulating heat dissipation structure for a pump, the pump having at least a liquid-isolating inner sleeve, an end cover that connects to the port of the liquid-isolating inner sleeve, a main shaft mounted between the end cover and the inner end of the liquid-isolating inner sleeve via a bearing assembly, and a magnetic core rotor mounted inside the liquid-isolating inner sleeve and connected to the main shaft, the outer end of the main shaft extending through the end cover into a pump cavity located outside the end cover and connected to a pump impeller, characterized in that: The magnetic core rotor has at least one hollow flow channel running through both ends of it, and a gap is formed between the outer wall of the magnetic core rotor and the inner wall of the liquid-separating inner sleeve; the end cap has at least one set of through holes connecting the pump chamber and the interior of the liquid-separating inner sleeve; the hollow flow channel of the magnetic core rotor, the gap between the outer wall of the magnetic core rotor and the inner wall of the liquid-separating inner sleeve, the through holes and the pump chamber form a heat dissipation channel for liquid flow. An annular baffle extends inward from the inner end face of the end cap, with the end of the annular baffle approaching the outer end face of the magnetic core rotor. The annular baffle divides the through holes on the end cap into two groups. One group of first through holes is distributed in an annular pattern on the inner side of the annular baffle, opposite to the hollow flow channel of the magnetic core rotor. The other group of second through holes is distributed in an annular pattern on the outer side of the annular baffle, opposite to the gap.

2. The built-in circulating heat dissipation structure of the pump according to claim 1, characterized in that: An auxiliary impeller is installed at the inner end of the magnetic core rotor, and the auxiliary impeller rotates synchronously with the magnetic core rotor.

3. The built-in circulating heat dissipation structure of the pump according to claim 2, characterized in that: The auxiliary impeller is installed in a direction that allows the liquid to flow from the space between the inner end face of the magnetic core rotor and the inner end of the liquid-separating inner sleeve into the hollow flow channel of the magnetic core rotor, and then flow to the outer end of the magnetic core rotor and into the pump chamber through the through hole.

4. The built-in circulating heat dissipation structure of the pump according to claim 1, characterized in that: The hollow flow channel of the magnetic core rotor is a number of fan-shaped flow channels evenly distributed along a direction parallel to the main shaft axis, and several blades are formed between the fan-shaped flow channels.

5. The built-in circulating heat dissipation structure of the pump according to claim 1, characterized in that: Several radial baffles are also formed along the inner and outer sides of the annular baffle.

6. The built-in circulating heat dissipation structure of the pump according to claim 1, characterized in that: The outer end face of the magnetic core rotor is formed with a first annular concave surface, and the end of the annular baffle extends into the interior of the first annular concave surface and approaches the inner bottom surface of the first annular concave surface.

7. The built-in circulating heat dissipation structure of the pump according to claim 2, characterized in that: The inner end face of the magnetic core rotor is formed with a second annular concave surface, and the auxiliary impeller is disposed in the second annular concave surface.

8. A pump comprising the built-in circulating heat dissipation structure as described in any one of claims 1-7.

9. The pump according to claim 8, characterized in that: The pump also includes a pump chamber housing mounted on the outside of the end cover to form a pump chamber, a pump body housing mounted to the pump chamber housing and located outside the liquid-blocking inner sleeve, a pump body cover mounted to the end of the pump body housing, and a winding stator mounted on the outer wall of the liquid-blocking inner sleeve.

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