A bushing assembly and a magnetic pump thereof

Abstract

The present invention discloses a shaft sleeve and a magnetic pump, relating to the field of magnetic pumps. The shaft sleeve includes a shaft sleeve, and both ends of the shaft sleeve are annularly protruded with clamping seats, and the clamping seats are arranged with double offsets. The inner wall of the shaft sleeve is spirally provided with a spiral groove, and a return groove is opened in the clamping seat at one end of the shaft sleeve corresponding to the spiral groove, and the return groove is communicated with the spiral groove. The return groove is arranged in a semi-notch shape along the edge of one end clamping seat, and the notch is arranged in an inverted trapezoid shape and is arranged at intervals in a ring shape along the edge. The structure of the present invention is novel. The structure of the shaft sleeve optimizes the cooling effect of the magnetic pump shaft sleeve. The structure of using a double shaft sleeve to intermittently connect the liquid in opposite directions to the shaft increases the dry-wet separation section of the rotating shaft inside the pump, enabling the shaft sleeve to play three roles of stabilizing the rotation, dissipating heat, and dry-wet segmentation of the rotating shaft. At the same time, it avoids the complete inflow of liquid from affecting the magnetic drive effect, achieving a significant enhancement of the overall use of the magnetic pump.

Description

Technical Field

[0001] The present invention relates to the field of magnetic pumps, and particularly to a magnetic pump shaft sleeve and a magnetic pump with a shaft sleeve. Background Art

[0002] The characteristic of a magnetic pump is that the motor and the pump body are magnetically driven through non-mechanical direct contact. In the pump body, a graphite shaft sleeve is provided between the rotating shafts of the impellers to achieve stable rotation drive of the rotating shafts. Moreover, the graphite shaft sleeve is not completely sealed. When the pump is working, the flowing liquid flows through the graphite shaft sleeve without being blocked. And the inner walls of the existing graphite shaft sleeves are all designed with some grooves, but these grooves only play a role in reducing the thermal expansion and contraction stress. For the rotating shaft at the liquid end with greater resistance, they do not have the effect of enhancing the cooling of the rotating shaft. And for the inflow of the fluid, it will cause another kind of resistance. Also, the inflow of the liquid will also have a certain impact on the magnetic drive structure of the magnetic pump, affecting the usability of the overall magnetic pump. Therefore, we propose a magnetic pump shaft sleeve and a magnetic pump with a shaft sleeve. Summary of the Invention

[0003] A magnetic pump shaft sleeve and a magnetic pump with a shaft sleeve proposed by the present invention optimize the existing magnetic pump shaft sleeve and the overall usability of the magnetic pump. To achieve the above object, the present invention adopts the following technical solutions:

[0004] A magnetic pump shaft sleeve includes a shaft sleeve. The two ends of the shaft sleeve are annularly protruded with clamping seats, and the clamping seats are arranged with double offsets. The inner wall of the shaft sleeve is spirally provided with spiral grooves, and a return groove is opened on the clamping seat at one end of the shaft sleeve corresponding to the spiral grooves, and the return groove is communicated with the spiral grooves. The return groove is arranged as a semi-notch along the edge of one end clamping seat, and the notch is arranged in an inverted trapezoid shape and is annularly arranged at intervals along the edge. Such a setting enables the fluid to flow in in a partially introduced manner in sequence according to the notch, without flowing in with a large impulse, avoiding causing another rotational resistance force, and at the same time achieving effective introduction of part of the liquid for heat dissipation.

[0005] There are two shaft sleeves, which are arranged oppositely and connected. A gasket ring is arranged between the two shaft sleeves. The two ends of the gasket ring are opened in a flared shape, and the outer peripheral wall of the gasket ring is provided with a mesh-like hollow. The gasket ring has two functions. One is to block the flow of the fluid inside one end shaft sleeve, and the second is to indirectly connect the two end shaft sleeves.

[0006] Preferably, multiple groups of the spiral grooves are annularly arranged around the shaft sleeve in an array, and the groove shape of the spiral grooves is U-shaped. The spiral directions of the spiral grooves between the two groups of shaft sleeves are opposite. This further prevents the liquid in the grooves from communicating with each other and increases the heat dissipation area. The shaft sleeve is made of graphite material.

[0007] A magnetic pump with the above-mentioned bushing, comprising an impeller and a motor. The impeller is sleeved with a pump casing, and one end of the pump casing away from the feed port is connected with an outer casing. An inner casing is sleeved inside the outer casing. A rotating shaft is arranged along the axial direction of the impeller, and a bushing is rotatably sleeved on the inner section of the rotating shaft located inside the inner casing. There are two bushings, which are arranged oppositely and connected. A spacer ring structure is arranged between the two bushings. The end of the rotating shaft is connected with an inner rotating cylinder. Inner magnetic blocks are fixedly attached to the outer wall of the inner rotating cylinder. An outer rotating cylinder is sleeved between the inner casing and the outer casing. Outer magnetic blocks are fixedly attached to the inner wall of the outer rotating cylinder. The output end of the motor penetrates the outer casing and is coaxially connected with the outer rotating cylinder. The inner magnetic blocks and the outer magnetic blocks are adsorbed corresponding to each other. The motor drives the outer magnetic blocks fixedly attached to the inner wall of the outer rotating cylinder to rotate, thereby driving the inner magnetic blocks to rotate, and then driving the rotating shaft and the impeller to rotate in sequence.

[0008] Preferably, the inner rotating cylinder and the rotating shaft are coaxially arranged, and the inner magnetic blocks and the outer magnetic blocks are annularly arrayed about the rotating shaft.

[0009] Preferably, the pump casing, the outer casing and the inner casing are all made of non-magnetic stainless steel.

[0010] The beneficial effects of the present invention are as follows:

[0011] 1. For the bushing used in this pump, one end is provided with a ring-shaped return groove structure. During use, the ring-shaped clamping seat end is used to connect with the component close to the fluid, so that the fluid can flow in in a guiding manner through the notch part, and will not flow in with a large impulse, avoiding causing another rotational resistance force. Moreover, by using the frictional force between the rotating shaft and a part of the fluid with a guiding flow pattern, the fluid is brought into the spiral groove. The spiral groove enables the fluid attached layer rotating with the rotating shaft to move axially along the bushing, and finally reaches a back-and-forth cycle through the return groove and the rotating shaft. The fluid driven by the impeller continuously circulates between the bushing at one end and the rotating shaft, enabling the bushing to not only fix the shaft, but also improve the heat dissipation efficiency of the rotating shaft and the bushing. The overall structure of the two bushings arranged oppositely and connected by a spacer ring effectively blocks the fluid inside one end of the bushing, and is also the fixed connection of different segments of the two shaft segments, enabling the rotating shaft to be completely divided into dry and wet segments. The bushing plays three roles of stabilizing rotation, heat dissipation, and dry-wet segmentation for the rotating shaft. This bushing is very suitable for use in pump structures.

[0012] 2. For the magnetic pump using this bushing, the pump body and the magnetic drive structure are first used to achieve the separated drive of the motor. The structure of the double bushing with intermittent liquid connection in opposite directions is set, which optimizes the working conditions of the fixation and heat dissipation of the rotating shaft and the bushing. At the same time, the dry-wet separation of the internal shaft section of the pump is further increased. One bushing uses a very small part of the flowing liquid for cooling, avoiding the high temperature caused by friction and also avoiding the complete inflow of the liquid from affecting the effect of the magnetic drive. The other bushing can also achieve cooling by using the rotating wind speed of the magnetic drive. The use of the two bushings plays a role in stabilizing the rotation of the rotating shaft of the magnetic pump, effectively dissipating heat, and realizing a complete dry-wet separation section. The overall structure greatly enhances the use of the magnetic pump. Description of the Drawings

[0013] Figure 1 It is a schematic structural view of the bushing of the present invention.

[0014] Figure 2 It is a schematic structural view of the magnetic pump of the present invention.

[0015] Figure 3 It is a structural sectional view of the magnetic pump of the present invention.

[0016] Figure 4 It is a schematic assembly structural view of the impeller and the bushing of the present invention.

[0017] Figure 5 It is a structural sectional view of the assembly of the bushing and the gasket ring of the present invention.

[0018] Reference numerals in the drawings: 1. Bushing; 101. Clamping seat; 102. Spiral groove; 103. Return groove; 2. Outer shell; 201. Pump shell; 202. Inner shell; 203. Spacing fixing block; 3. Impeller; 301. Rotating shaft; 302. Gasket ring; 303. Inner rotating cylinder; 304. Inner magnetic block; 4. Motor; 401. Outer rotating cylinder; 402. Outer magnetic block. Detailed Embodiments

[0019] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments.

[0020] Refer to Figures 1 - 5, A magnetic pump shaft sleeve, including shaft sleeve 1, both ends of the shaft sleeve 1 are annularly protruded with clamping seats 101, and the clamping seats 101 are arranged with double offsets. The inner wall of the shaft sleeve 1 is spirally provided with a spiral groove 102, and a reflux groove 103 is opened in the clamping seat 101 at one end of the shaft sleeve 1 corresponding to the spiral groove 102. The reflux groove 103 is communicated with the spiral groove 102. The reflux groove 103 is arranged with a semi-notch along the edge of one end clamping seat 101, and the notch is arranged in an inverted trapezoid shape and is arranged at intervals in a ring shape along the edge. With this structural arrangement, when used in a pump, the end with the ring-shaped clamping seat 101 is connected to the component close to the fluid, so that the fluid part can flow in in a guiding manner through the notch part, without flowing in with a large impulse, avoiding causing another rotational resistance force, and at the same time effectively guiding the heat dissipation inside the sleeve body and the shaft part.

[0021] The notch is designed to be arranged in an inverted trapezoid shape and is arranged at intervals in a ring shape along the edge, which is also beneficial to the stable connection with other components.

[0022] A magnetic pump with a shaft sleeve, including an impeller 3 and a motor 4. The impeller 3 is sleeved with a pump casing 202, and one end of the pump casing 202 far from the feed port is connected with a housing 2. An inner housing 201 is sleeved inside the housing 2. The impeller 3 is axially provided with a rotating shaft 301, and the rotating shaft 301 is rotatably sleeved with a shaft sleeve 1 in the inner section of the inner housing 201. There are two shaft sleeves 1, which are arranged oppositely and connected. A structure of a spacer ring 302 is arranged between the two shaft sleeves 1. The end of the rotating shaft 301 is connected with an inner rotating cylinder 303. An inner magnetic block 304 is fixedly attached to the outer wall of the inner rotating cylinder 303. An outer rotating cylinder 401 is sleeved between the inner housing 201 and the housing 1. An outer magnetic block 402 is fixedly attached to the inner wall of the outer rotating cylinder 401. The output end of the motor 4 penetrates through the housing 2 and is coaxially connected with the outer rotating cylinder 401. The inner magnetic block 304 and the outer magnetic block 402 are correspondingly adsorbed.

[0023] The inner rotating cylinder 303 and the rotating shaft 301 are coaxially arranged, and the inner magnetic block 304 and the outer magnetic block 402 correspond to each other, and the inner magnetic block 304 and the outer magnetic block 402 are annularly arrayed about the rotating shaft 301. Through the magnetic force between the outer magnetic block 402 and the inner magnetic block 304, the motor 4 drives the rotating shaft 301 and the impeller 3 to rotate. That is, the motor 4 drives the outer magnetic block 402 fixedly attached to the inner wall of the outer rotating cylinder 401 to rotate, thereby driving the corresponding inner magnetic block 304 to rotate, and then driving the rotating shaft 301 and the impeller 3 to rotate in sequence.

[0024] Reference Figure 3 and Figure 5, there are two shaft sleeves 1 used in this magnetic pump, and they are arranged facing each other and connected. A spacer ring 302 is arranged between the two shaft sleeves 1. Both ends of the spacer ring 302 are open and in a flared shape. The outer peripheral wall of the spacer ring 302 is provided with a mesh-like hollow. The spacer ring 302 has two functions. One is to block the flow of the fluid inside one end of the shaft sleeve, and the second is to indirectly connect the two shaft sleeves. When in use, the rotating shaft 301 penetrates through the pump casing 202, and the rotating shaft 301 is sleeved with one end of the shaft sleeve 1. Moreover, the impeller 3 inside the pump casing 202 is connected to the shaft sleeve 1 provided with the annular end of the reflux groove 103, so that part of the fluid can enter the inside of the shaft sleeve 1 for cooling, and will not flow into the other shaft sleeve. The spiral directions of the spiral grooves 102 between the two groups of shaft sleeves 1 are opposite. Coupled with the blocking connection of the spacer ring 302, this can completely prevent the liquid in the grooves from communicating with each other, and realize the separation of the wet and dry sections on the same axis. The other shaft sleeve 1 is connected to the driving structure of the magnetic rotation, and can realize cooling by using the rotating wind speed. Other components can be arranged on the two shaft sleeves to be fixedly connected to the inner casing 201 or other components, so as to realize the stable rotation and fixing of different segments of the rotating shaft (this is the original fixing function of the shaft sleeve), which will not be elaborated here.

[0025] Reference Figure 3 , the spiral directions of the spiral grooves 102 between the two groups of shaft sleeves 1 are opposite, which completely realizes the segmented connection of the wet and dry shafts. The shaft sleeve 1 is made of tetrafluoro graphite, and the pump casing 201, the outer casing 2 and the inner casing 202 are all made of non-magnetic stainless steel.

[0026] The working principle of the new structure of the shaft sleeve 1 to optimize the cooling effect of the graphite shaft sleeve of the existing magnetic pump: Reference Figure 3 and Figure 1 , this device uses the frictional force between the rotating shaft 301 and the fluid to bring part of the fluid into the spiral groove 102. The spiral groove 102 makes the fluid attached layer rotating with the rotating shaft 301 move axially along the shaft sleeve 1, and is finally stopped by the spacer ring 302, and then drives the liquid ring to flow from the rotation. Because the impeller drives different fluids, this realizes the continuous circulation of the fluid between one end of the shaft sleeve 1 and the rotating shaft 301, and improves the heat dissipation efficiency of the rotating shaft 301 and the shaft sleeve 1.

[0027] The shaft sleeve used for the pump is provided with an annular reflux groove structure at one end. During use, the ring-shaped clamping seat end is used to connect with the component close to the fluid, so that the fluid can flow in in a way of being introduced through the notch part, without flowing in with a large impulse, avoiding causing another rotational resistance force. Moreover, by using the frictional force between the rotating shaft and a part of the fluid with a drainage type, the fluid is brought into the spiral groove. The spiral groove enables the fluid attached layer rotating with the rotating shaft to move axially along the shaft sleeve, and finally reaches a back-and-forth cycle through the reflux groove and the movement of the rotating shaft. The fluid driven by the impeller continuously circulates between the shaft sleeve and the rotating shaft at one end, enabling the shaft sleeve to not only fix the shaft, but also achieve the heat dissipation efficiency of the rotating shaft and the shaft sleeve. The overall structure of the two shaft sleeves arranged oppositely and connected by a gasket ring effectively blocks the flow of the fluid inside one end shaft sleeve, and is also the fixed connection of different segments of the two shaft segments, and enables the rotating shaft to be completely dry and wet segmented, so that the shaft sleeve plays three roles of stabilizing rotation, heat dissipation, and dry-wet segmentation for the shaft. This shaft sleeve is very suitable for use in the pump structure.

[0028] For the design principle of the magnetic pump using this shaft sleeve, first, the pump body and the magnetic drive structure are used to achieve the separated drive of the motor. And the structure of the double shaft sleeves connected to the shaft with intermittent liquid in an opposite direction is set, optimizing the working conditions of the fixation and heat dissipation of the rotating shaft and the shaft sleeve. At the same time, it further increases the dry-wet separation of the shaft segments inside the pump. One shaft sleeve uses a very small amount of flowing liquid for cooling, avoiding the high temperature caused by friction, and at the same time avoiding the complete inflow of the liquid from affecting the effect of the magnetic drive. The other shaft sleeve can also achieve cooling by using the rotating wind speed of the magnetic drive. The use of the two shaft sleeves plays the roles of stabilizing the rotation, effectively dissipating heat, and achieving complete dry-wet separation segments for the rotating shaft of the magnetic pump, greatly enhancing the use of the overall structure of the magnetic pump.

[0029] The rotating shaft 301 connected with the inner rotating cylinder 303 is provided with spaced fixing blocks 203 connected to the shaft sleeve 1, which can achieve the fixed connection function, and at the same time further prevent the liquid from entering the magnetic drive structure part along with the rotation of the shaft sleeve.

[0030] A plurality of groups of the spiral grooves 102 are annularly and arrayedly distributed with respect to the shaft sleeve 1, and the groove shape of the spiral grooves 102 is U-shaped, so as to increase its heat dissipation surface.

[0031] As mentioned above, it is only the preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent substitutions or changes, and all should be covered within the protection scope of the present invention.

Claims

1. A bushing assembly, characterized in that, It includes two bushings (1), which are symmetrically arranged. At both ends of each bushing (1), a first clamping seat and a second clamping seat are respectively arranged in a ring-shaped protrusion. A spiral groove (102) is arranged in a spiral shape on the inner wall of the bushing (1), and a return groove (103) is arranged in the first clamping seat of the bushing (1) corresponding to the spiral groove (102). The return groove (103) is communicated with the spiral groove (102). The edge of the first clamping seat at the corresponding end of the return groove (103) is arranged in a semi-notch shape, and the notch is arranged in an inverted trapezoid shape and is arranged in a spaced ring shape along the edge. The spiral grooves (102) are distributed in multiple groups in a ring array about the bushing, and the groove shape of the spiral groove (102) is U-shaped. A gasket ring (302) is arranged between the two bushings (1). The two ends of the gasket ring (302) are open and in a horn shape. The outer peripheral wall of the gasket ring (302) is provided with a mesh-shaped hollow. The second clamping seats of the two bushings are respectively abutted against the gasket ring (302). One bushing uses air cooling and the other bushing uses oil cooling.

2. The bushing assembly according to claim 1, characterized in that, The bushing (1) is made of graphite material.

3. A magnetic pump with the bushing assembly as described in any one of claims 1 to 2 above, characterized in that, It includes an impeller (3) and a motor (4). The impeller (3) is sleeved with a pump casing (201), and one end of the pump casing (201) far from the feed port is connected with a housing (2). An inner housing (202) is sleeved in the housing (2). A rotating shaft (301) is arranged along the axis of the impeller (3), and a bushing (1) is rotatably sleeved in the inner section of the inner housing (202) where the rotating shaft (301) is located. The end of the rotating shaft (301) is connected with an inner rotating cylinder (303). An inner magnetic block (304) is fixedly attached to the outer wall of the inner rotating cylinder (303). An outer rotating cylinder (401) is sleeved between the inner housing (202) and the housing (2). An outer magnetic block (402) is fixedly attached to the inner wall of the outer rotating cylinder (401). The output end of the motor (4) penetrates through the housing (2) and is coaxially connected with the outer rotating cylinder (401). The inner magnetic block (304) and the outer magnetic block (402) are correspondingly adsorbed.

4. The magnetic pump with a bushing assembly according to claim 3, characterized in that, The inner rotating cylinder (303) and the rotating shaft (301) are coaxially arranged, and the inner magnetic block (304) and the outer magnetic block (402) correspond to each other and are distributed in a ring array about the rotating shaft (301).

5. A magnetic pump with a bushing assembly according to claim 4, wherein The pump casing (201), the housing (2), the impeller and the inner housing (202) are all made of non-magnetic stainless steel material.

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