Axial magnetic field enhanced magnetofluid sealing structure and pump body

Abstract

The invention relates to the technical field of magnetofluid sealing, and discloses an axial magnetic field enhanced magnetofluid sealing structure and a pump body, the sealing structure comprises a rotating shaft, a lining and a shaft sleeve which are sequentially arranged on the rotating shaft in a sleeving mode, a shell connected with the shaft sleeve and arranged on the rotating shaft in a sleeving mode, and a pressing plate used for connecting the shell and the shaft sleeve; a containing cavity is formed among the pressing plate, the shell and the shaft sleeve, and the sealing mechanism is arranged in the containing cavity. A containing cavity is formed between the shell and the lining through the arranged shell, the magnet is arranged in the containing cavity, the magnetism isolating ring, the water retaining ring and the sealing plate are arranged, the containing cavity can be preliminarily sealed through the arranged sealing plate, and water flow can be prevented from entering the containing cavity through the arranged sealing plate and the water retaining ring; water flow convergence can be prevented through the arranged water throwing ring, and damage to the device is avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of magnetic fluid sealing, and particularly relates to an axial magnetic field enhanced magnetic fluid sealing structure and a pump body. BACKGROUND

[0002] Traditional sealing technologies such as mechanical sealing are prone to wear and tear, have short service lives, and have high leakage rates, and thus are difficult to meet the requirements of vacuum, high-speed rotation and other scenes.

[0003] By combining magnetic fluid materials with magnetic field control technology, a magnetic fluid sealing structure is generated, which utilizes the magnetism and fluidity of magnetic fluid to achieve non-contact dynamic sealing, makes up for the defects of traditional technologies, and promotes the upgrading of precise equipment sealing.

[0004] A magnetic fluid sealing structure for a transmission shaft is disclosed in Chinese Patent No. CN2603249Y, which is composed of a transmission shaft, a supporting shell and a magnetic fluid sealing assembly, and is characterized in that an additional magnetic ring is additionally arranged near the upper part of a magnetic fluid sealing interval L of the magnetic fluid sealing assembly composed of a permanent magnet, a pole shoe and magnetic liquid, and close to the side of the vacuum cavity; a transmission bearing is arranged on the upper edge of the additional magnetic ring and on the lower side of the magnetic fluid sealing interval L.

[0005] However, the prior art still has some problems. In order to avoid the fact that, when the magnetic fluid is working, the rotating shaft generates high heat due to the excessively high rotating speed of the rotating shaft or the long-time working of the rotating shaft, thereby reducing the magnetism of the magnet and causing the sealing performance of the magnetic fluid to be reduced, the working temperature of the pump body can be reduced by spraying cooling liquid on the surface of the pump body. However, when the cooling liquid enters the area between the liner and the magnet, the properties of the magnetic fluid will change, thereby causing the sealing work to fail.

[0006] Therefore, how to avoid the cooling liquid from entering the placement cavity is a problem to be solved at present. SUMMARY

[0007] The present application provides an axial magnetic field enhanced magnetic fluid sealing structure and a pump body to solve the above problems in the prior art.

[0008] An axial magnetic field enhanced magnetic fluid sealing structure comprises:

[0009] a rotating shaft, a liner and a shaft sleeve which are sequentially sleeved on the rotating shaft, a shell connected with the shaft sleeve and sleeved on the rotating shaft, a pressing plate for connecting the shell and the shaft sleeve, a placement cavity formed between the pressing plate, the shell and the shaft sleeve, and a sealing mechanism arranged in the placement cavity.

[0010] Furthermore, the sealing mechanism includes a magnet built into the placement cavity, two magnetic shielding rings symmetrically arranged on the magnet, two water-blocking rings symmetrically arranged on the magnetic shielding rings, a sealing plate abutting against one of the water-blocking rings, and an air-sealing unit arranged on the housing.

[0011] The sealing plate is in contact with the pressure plate, and the pressure plate is fixedly installed on the housing by bolts;

[0012] Another water-retaining ring is connected to the housing; the magnetic poles of the magnet are oriented in the direction of the axis of rotation.

[0013] The bushing is provided with a spiral groove, which overlaps with the magnet and is filled with a magnetic fluid.

[0014] A pump body includes an axial magnetic field enhanced magnetohydrodynamic seal structure;

[0015] It also includes a support shell fitted onto the housing, a gas channel and a liquid channel respectively opened in the housing, an air inlet and an air outlet respectively communicating with the gas channel, an air inlet connected to the air inlet, a water inlet provided at one end of the liquid channel, a connecting pipe communicating with the other end of the liquid channel, a drain pipe communicating with the connecting pipe, an oil injection unit provided on the support shell for injecting lubricating oil, an installation unit fixedly installed on the support shell, a bracket inserted into the installation unit, and a liquid inlet provided on the bracket;

[0016] By cooperating with the mounting unit, the inlet nozzle is positioned in the water inlet to complete the injection of cooling water.

[0017] The air-sealing unit is existing technology. It works in conjunction with a sealing mechanism and by introducing a specific gas and cooperating with a magnetic fluid to improve the sealing performance of the rotating shaft. A sealing gasket is provided in the water inlet.

[0018] Furthermore, the liquid inlet is also provided with a guide block;

[0019] The inlet end of the inlet nozzle is a neck-shaped inlet. The inner wall of the inlet nozzle is provided with multiple interconnected frustum-shaped chambers, and the bottom of the frustum-shaped chambers is concave towards the inlet with a certain arc. The front end of the guide block is a conical structure, and the guide block is provided with an annular groove. Adjacent annular grooves are connected by curved surfaces.

[0020] By positioning the guide block within the inlet nozzle and spacing the annular groove between it and the bottom of the frustum-shaped chamber with a pre-existing gap, this gap achieves unidirectional conductivity.

[0021] Furthermore, the installation unit includes a fixed seat embedded in the support shell, a limiting shaft fixedly disposed on the fixed seat, a limiting spring sleeved on the limiting shaft, a movable seat connected to the limiting spring, a driving part disposed on the movable seat, a limiting block connected to the movable seat, a limiting groove formed on the fixed seat, and a first protrusion and a second protrusion disposed on the inner wall of the fixed seat.

[0022] There is a guide channel between the first protrusion and the second protrusion for the movement of the drive unit;

[0023] The limiting block is located inside the limiting groove.

[0024] Furthermore, the drive unit includes a pressing block disposed on the movable seat, two elastic clamps symmetrically disposed on the pressing block, a rotating seat disposed on the movable seat, a rocker arm movably connected to the rotating seat, a guide wheel disposed on the rocker arm, and a torsion spring disposed between the rotating seat and the rocker arm.

[0025] The front view of the first protrusion is arrow-shaped, including a first guide edge, a second guide edge, a third guide edge, a fourth guide edge, and a fifth guide edge;

[0026] There is an included angle between adjacent guide edges, and there is an arc-shaped transition edge between the second guide edge and the third guide edge;

[0027] The front view of the second protrusion includes an inverted trapezoidal groove and an inclined surface connected to one of the inclined sides of the inverted trapezoidal groove;

[0028] The guide channel has a Z-shaped structure; the insertion area on the bracket has an inverted T-shaped structure.

[0029] By positioning the guide wheel at the arc-shaped transition edge, the elastic clamp completes the limiting and locking of the insert.

[0030] Furthermore, the air intake includes an air intake pipe connected to the support shell, a support frame connected to the air intake pipe, a ventilation device disposed on the support frame, and a vent hole disposed on the air intake pipe and facing the ventilation device; the air intake pipe has an annular structure.

[0031] The cross-sectional view of the intake pipe includes a first curved path pipe, a second curved path pipe and a fourth curved path pipe respectively disposed on both sides of the first curved path pipe, and a third curved path pipe connected to the second curved path pipe.

[0032] The end of the fourth curved path tube bends toward the first curved path tube, and the third curved path tube moves toward the first curved path tube, with a gap between them.

[0033] Furthermore, the oil injection unit includes a lower housing fixedly installed in the support housing, an upper housing screwed to the lower housing, an adjusting member disposed in the upper housing and penetrating the lower housing, and an oil inlet disposed on the upper housing;

[0034] The ventilation equipment includes, but is not limited to, a fan and a rotating motor connected to the fan.

[0035] Furthermore, the adjusting component includes a propulsion cylinder fixedly mounted on the upper housing, a propulsion rod connected to the output end of the propulsion cylinder, a transition plate sleeved on the propulsion rod, a second limiting seat and a third limiting seat respectively sleeved on the propulsion rod, and a return spring for connecting the transition plate and the lower housing;

[0036] The second limiting seat is located inside the lower housing, and the third limiting seat is located outside the lower housing;

[0037] Multiple oil passage holes are evenly distributed on the transition plate.

[0038] Furthermore, the adjusting component also includes a limiting chamber disposed on the upper housing, an abutment seat built into the limiting chamber, and a plurality of oil outlet grooves opened in the circumferential direction of the upper housing;

[0039] One end of the lower housing extends into the upper housing, and a sealing gasket is provided on the lower housing; there are gaps between the limiting chamber and the upper housing, as well as between the transition plate and the upper housing.

[0040] Beneficial Effects: This invention discloses an axial magnetic field enhanced magnetohydrodynamic sealing structure and pump body. To prevent coolant from entering the placement cavity, the device includes a magnet built into the placement cavity, two magnetic isolation rings symmetrically arranged on the magnet, two water-blocking rings symmetrically arranged on the magnetic isolation rings, a sealing plate abutting against one of the water-blocking rings, and an air-sealing unit on the housing. The sealing plate contacts the pressure plate, and the pressure plate is fixedly installed on the housing by bolts. The other water-blocking ring is connected to the housing. The magnetic pole direction of the magnet is the axial direction of the rotating shaft. The bushing has a spiral groove with an overlapping area with the magnet, and the spiral groove is filled with magnetohydrodynamic fluid. The housing forms a placement cavity between the housing and the bushing. By building the magnet into the placement cavity and providing the magnetic isolation ring, water-blocking ring, and sealing plate, the sealing plate can initially seal the placement cavity. The sealing plate and water-blocking ring can prevent water from entering the placement cavity, and the water-slinging ring can prevent water from accumulating and causing damage to the device. Attached Figure Description

[0041] Figure 1This is a cross-sectional view of an axial magnetic field enhanced magnetohydrodynamic sealing structure according to the present invention;

[0042] Figure 2 This is a schematic diagram of the installation unit structure of the present invention;

[0043] Figure 3 This is a schematic diagram of the mounting unit of the present invention;

[0044] Figure 4 This is a rear view of the mounting unit of the present invention;

[0045] Figure 5 This is a schematic diagram of the liquid inlet nozzle of the present invention;

[0046] Figure 6 This is a schematic diagram of the insert holder of the present invention;

[0047] Figure 7 This is a schematic diagram of the air intake section of the present invention;

[0048] Figure 8 This is a schematic diagram of the oil injection unit of the present invention;

[0049] Figure 9 This is a schematic diagram of the oil outlet groove of the present invention.

[0050] Explanation of reference numerals in the attached drawings: 1. Support shell; 2. Sealing mechanism; 21. Shell; 22. Air seal unit; 23. Magnet; 24. Magnetic isolation ring; 25. Water-slinging ring; 26. Sealing plate; 27. Pressure plate; 28. Bushing; 29. ​​Water-retaining ring; 210. Bushing; 3. Rotating shaft; 4. Mounting unit; 42. First protrusion; 43. Second protrusion; 44. Limiting shaft; 45. Limiting spring; 46. Moving seat; 47. Fixed seat; 48. Limiting groove; 49. Limiting block; 410. Rotating seat; 411. Pressing block; 412. Elastic clamp; 413. Rocker arm; 414. Guide wheel; 5. Insert bracket; 6. Liquid inlet; 7. Guide block; 8. 9. Connecting pipe; 10. Drain pipe; 11. Self-aligning roller bearing; 12. Air inlet; 13. Support frame; 14. Ventilation equipment; 15. Air inlet pipe; 16. First curved path pipe; 17. Second curved path pipe; 18. Third curved path pipe; 19. Fourth curved path pipe; 10. Oil injection unit; 11. Upper housing; 12. Lower housing; 13. Oil inlet; 14. Propulsion cylinder; 15. Abutment seat; 16. Propulsion rod; 17. Limiting chamber; 18. Transition plate; 19. Second limiting seat; 10. Third limiting seat; 11. Return spring; 12. Oil outlet groove. Detailed Implementation

[0051] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0052] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0053] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single embodiment or an embodiment selectively excluded from other embodiments.

[0054] This invention discloses an axial magnetic field enhanced magnetohydrodynamic sealing structure and pump body, with reference to Figures 1-9 ,include:

[0055] An axial magnetic field enhanced magnetohydrodynamic sealing structure includes: a rotating shaft 3; a bushing 210 and a bushing 28 sequentially sleeved on the rotating shaft 3; a housing 21 connected to the bushing 28 and sleeved on the rotating shaft 3; a pressure plate 27 for connecting the housing 21 and the bushing 28; a placement cavity formed between the pressure plate 27, the housing 21, and the bushing 28; and a sealing mechanism 2 disposed within the placement cavity. The sealing mechanism 2 includes a magnet 23 built into the placement cavity, two magnetic shielding rings 24 symmetrically disposed on the magnet 23, and magnetic shielding rings 24 symmetrically disposed on the magnetic shielding rings 24. The ring 24 has two water-blocking rings 29, a sealing plate 26 that abuts against one of the water-blocking rings 29, and an air-sealing unit 22 disposed on the housing 21; the sealing plate 26 contacts the pressure plate 27 and the pressure plate 27 is fixedly mounted on the housing 21 by bolts; the other water-blocking ring 29 is connected to the housing 21; the magnetic pole direction of the magnet 23 is the axial direction of the rotating shaft 3; the bushing 28 is provided with a spiral groove, the spiral groove has an overlapping area with the magnet 23, and the spiral groove is filled with a magnetic fluid; the bushing 210 is also provided with a water-slinging ring 25;

[0056] During installation, the magnet 23 is placed in the placement cavity, and then the magnetic shielding ring 24, the water baffle ring 29, the sealing plate 26 and the pressure plate 27 are arranged in sequence away from the magnet 23. The pressure plate 27 is fixed to the housing 21 with bolts to complete the sealing work of the magnet 23. Since the bushing 28 is provided with magnetic fluid, a magnetic sealing ring can be formed in the magnetic field environment generated by the magnet 23, thereby completing the sealing work and preventing the coolant from entering the area where the magnetic fluid is located, which would cause changes in the properties of the magnetic fluid and make it difficult for it to perform the sealing work.

[0057] A pump body includes an axial magnetic field enhanced magnetohydrodynamic sealing structure; it also includes a support shell 1 sleeved on the housing 21, a gas channel and a liquid channel respectively opened in the housing 21, an air inlet and an air outlet respectively communicating with the gas channel, an air inlet 11 connected to the air inlet, a water inlet at one end of the liquid channel, a connecting pipe 8 communicating with the other end of the liquid channel, a drain pipe 9 communicating with the connecting pipe 8, an oil injection unit 12 for injecting lubricating oil on the support shell 1, a mounting unit 4 fixedly mounted on the support shell 1, a bracket 5 inserted into the mounting unit 4, and a liquid inlet 6 mounted on the bracket 5. The insertion bracket 5 and the mounting unit 4 work together to position the inlet nozzle 6 in the water inlet, thus completing the injection of cooling water. The gas channel and liquid channel are both existing technologies, namely two independent annular through holes. By setting them on the housing 21, the temperature of the pump body can be reduced when gas or coolant flows, so that the magnet can be kept at a predetermined temperature. This avoids the magnetism of the magnet 23 from changing due to high temperature, which would reduce the sealing effect of the magnetofluid. Through the cooperation between the insertion bracket 5 and the mounting unit 4, at least two inlet nozzles 6 can be installed at the same time, thus ensuring that the coolant can smoothly enter the pump body and thereby regulate the operating temperature of the pump body.

[0058] The inlet nozzle 6 is also provided with a guide block 7; the inlet end of the inlet nozzle 6 is a neck-shaped inlet, and the inner wall of the inlet nozzle 6 is provided with multiple interconnected frustum-shaped chambers, and the bottom of the frustum-shaped chambers is concave towards the inlet with a certain arc. The front end of the guide block 7 is a conical structure, and the guide block 7 is provided with an annular groove, and adjacent annular grooves are connected by curved surfaces; by positioning the guide block 7 in the inlet nozzle 6, and spacing the annular grooves and the bottom of the frustum-shaped chambers with a gap between them, the gap has unidirectional conductivity.

[0059] When coolant injection is required, the inlet nozzle 6 is installed by cooperating with the mounting unit 4 and the insert 5, so that the inlet nozzle 6 is located inside the water inlet. Then, coolant is injected through the inlet nozzle 6. During this process, the neck-shaped water inlet provides a certain acceleration effect when the coolant enters the inlet nozzle 6. The water then flows out from the other end of the inlet nozzle 6 through the gap. When it is necessary to stop the liquid delivery, a certain negative pressure is generated in the delivery pipe. This negative pressure carries a certain amount of liquid from the outlet of the inlet nozzle 6 to the inlet. During this process, the water flow is divided into a main flow channel and a secondary flow channel. Due to the concavity at the bottom of the frustum-shaped chamber, the water flow in the secondary flow channel obstructs the water flow in the main flow channel, thereby reducing the backflow of coolant.

[0060] The mounting unit 4 includes a fixed base 47 embedded in the support shell 1, a limiting shaft 44 fixedly mounted on the fixed base 47, a limiting spring 45 sleeved on the limiting shaft 44, a movable base 46 connected to the limiting spring 45, a driving part mounted on the movable base 46, a limiting block 49 connected to the movable base 46, a limiting groove 48 formed on the fixed base 47, and a first protrusion 42 and a second protrusion 43 provided on the inner wall of the fixed base 47; there is a guide channel between the first protrusion 42 and the second protrusion 43 for the movement of the driving part; the limiting block 49 is located in the limiting groove 48; the driving part includes a pressing block 411 provided on the movable base 46, two elastic clamps 412 symmetrically arranged on the pressing block 411, and a movable base 46 connected to the supporting shell 1. The structure includes a rotating seat 410 on the seat 46, a rocker arm 413 movably connected to the rotating seat 410, a guide wheel 414 on the rocker arm 413, and a torsion spring between the rotating seat 410 and the rocker arm 413; the front view of the first protrusion 42 is arrow-shaped, including a first guide edge, a second guide edge, a third guide edge, a fourth guide edge, and a fifth guide edge; there is an included angle between adjacent guide edges, and there is an arc-shaped transition edge between the second guide edge and the third guide edge; the front view of the second protrusion 43 includes an inverted trapezoidal groove and an inclined surface connected to an inclined side of the inverted trapezoidal groove; the guide channel has a Z-shaped structure; the insertion area on the insert 5 has an inverted T-shaped structure; by positioning the guide wheel 414 on the arc-shaped transition edge, the elastic clamp 412 completes the limiting and locking of the insert 5;

[0061] When the inlet nozzle 6 needs to be installed, press the insert 5 so that it abuts against the pressing block 411. As the pressing extends, the pressing block 411 moves closer to the limiting shaft 44. During the movement of the pressing block 411, the guide wheel 414 contacts the first guide edge. As the pressing extends, the guide wheel 414 moves along the first guide edge. When the guide wheel 414 is at its lowest point, no more pressure is applied. At this point, with the cooperation of the torsion spring and the limiting spring 45, the guide wheel 414 can be positioned at the second limit. On the second guide edge, it finally reaches the arc transition edge. During the descent of the moving seat 46, the elastic clamp 412 deforms, thereby completing the clamping and limiting work of the insert 5, and then fixing it with bolts. When the insert 5 needs to be released, the insert 5 is pressed again, thereby causing the guide wheel 414 to move. Then the guide wheel 414 can move along the third guide edge and the fourth guide edge. After the operator no longer applies pressure, the moving seat 46 moves upward with the cooperation of the limit spring 45 and the torsion spring, thereby completing the unlocking work.

[0062] The first protrusion 42 enables the guide wheel 414 to be fixed and locked, ensuring the smooth progress of the installation. First, the injection nozzle and the pump body are quickly pre-positioned by pressing, eliminating the need for manual alignment of the bolt holes and greatly reducing alignment time. Then, the bolts are used for secondary fixing, and the mechanical locking of the threads enhances the connection strength, avoiding the risk of loosening that may occur with simple pressing. At the same time, the installation unit 4 absorbs some of the vibration energy through the spring, reducing the impact on the bolts and lowering the probability of bolt loosening.

[0063] The air intake 11 includes an air intake pipe 113 connected to the support shell 1, a support frame 111 connected to the air intake pipe 113, a ventilation device 112 disposed on the support frame 111, and a vent hole disposed on the air intake pipe 113 and facing the ventilation device 112. The air intake pipe 113 has an annular structure. In the cross-sectional view of the air intake pipe 113, there is a first curved path pipe 1131, a second curved path pipe 1132 and a fourth curved path pipe 1134 disposed on both sides of the first curved path pipe 1131, and a third curved path pipe 1133 connected to the second curved path pipe 1132. The end of the fourth curved path pipe 1134 bends toward the first curved path pipe 1131, and the third curved path pipe 1133 moves toward the first curved path pipe 1131, with a gap between them.

[0064] When air cooling is required, the ventilation device 112 starts working, and the resulting airflow can follow the first curved path pipe 1131, the second curved path pipe 1132, and the third curved path pipe 1133, and exit through the gap between the fourth curved path pipe 1134 and the first curved path pipe 1131. Because the gap is small, the airflow velocity is relatively high when the gas passes through the gap. Therefore, after the airflow passes through the gap, it can not only deliver gas to the gas channel, but also carry the surrounding airflow into the gas channel. This makes the actual airflow entering the gas channel much greater than the gas output of the ventilation device 112, avoiding the use of a high-power ventilation device 112 to obtain a larger airflow, which would result in excessive vibration of the pump body during operation.

[0065] To enable the lubrication of the self-aligning roller bearing 10, since the self-aligning roller bearing 10 includes at least two opposing frustum-shaped double-row rollers, this device includes a lubrication unit 12. The lubrication unit 12 includes a lower housing 122 fixedly installed in the support housing 1, an upper housing 121 screwed to the lower housing 122, an adjusting member disposed in the upper housing 121 and penetrating the lower housing 122, and an oil inlet 123 disposed on the upper housing 121. The adjusting member includes a propulsion cylinder 124 fixedly installed on the upper housing 121, a propulsion rod 127 connected to the output end of the propulsion cylinder 124, a transition plate 129 sleeved on the propulsion rod 127, and second limiting seats 121 respectively sleeved on the propulsion rod 127. The adjustment component includes a second limiting seat 1210 and a third limiting seat 1211, and a return spring 1212 for connecting the transition plate 129 and the lower housing 122; the second limiting seat 1210 is located inside the lower housing 122, and the third limiting seat 1211 is located outside the lower housing 122; a plurality of oil passage holes are evenly arranged on the transition plate 129; the adjustment component also includes a limiting chamber 128 provided on the upper housing 121, an abutment seat 126 built into the limiting chamber 128, and a plurality of oil outlet grooves 1213 opened in the circumferential direction of the upper housing 121; one end of the lower housing 122 extends into the upper housing 121, and a sealing gasket is provided on the lower housing 122; there are gaps between the limiting chamber 128 and the upper housing 121, and between the transition plate 129 and the upper housing 121;

[0066] When oil injection is required, the lubricating oil delivered at this time can enter the space between the upper housing 121 and the lower housing 122 through the oil inlet 123. As the injection volume increases, the lubricating oil moves along the gap between the transition plate 129 and the upper housing 121, and is discharged from the oil outlet 1213. At this time, the direction of the lubricating oil spray is the circumferential direction of the self-aligning roller bearing 10. At this time, the lubricating oil can contact the rollers of the self-aligning roller bearing 10, thereby lubricating the rollers in the self-aligning roller bearing 10. Then, by starting the propulsion cylinder 124, the second limit seat 1210 and the third limit seat 1211 can be moved down. At this time, the transition plate 129 abuts against the sealing gasket, and the third limit seat 1211 moves away from the lower housing 122. At this time, the lubricating oil is sprayed out from the axial direction of the lower housing 122, thereby allowing the lubricating oil to contact the rotating shaft 3, thereby completing the lubrication work between the rotating shaft 3 and the inner ring of the self-aligning roller bearing 10, ensuring that the pump body can operate smoothly.

[0067] Working principle description: When coolant injection is required, the inlet nozzle 6 is installed through the cooperation of the bracket 5 and the mounting unit 4, so that the inlet nozzle 6 is located inside the water inlet end, and then the coolant is injected through the inlet nozzle 6. During this process, due to the neck-shaped water inlet, the coolant can have a certain acceleration effect when entering the inlet nozzle 6. Then the water flows out from the other end of the inlet nozzle 6 through the gap. When it is necessary to stop the liquid delivery, a certain negative pressure will be generated in the delivery pipe. At this time, the negative pressure will carry a certain amount of liquid from the outlet of the inlet nozzle 6 to the inlet. During this process, the water flow will be divided into the main flow channel and the secondary flow channel. Due to the concavity at the bottom of the frustum-shaped chamber, the water flow in the secondary flow channel will obstruct the water flow in the main flow channel.

[0068] When installing the inlet nozzle 6, press the insert 5 so that it abuts against the pressing block 411. As the pressure deepens, the pressing block 411 moves closer to the limiting shaft 44. During this movement, the guide wheel 414 contacts the first guide edge and moves along it. When the guide wheel 414 is at its lowest point, no more pressure is applied. With the cooperation of the torsion spring and the limiting spring 45, the guide wheel 414 is positioned on the second guide edge, eventually reaching the arc-shaped transition edge. As the moving seat 46 descends, the elastic clamp 412 deforms, thus clamping and limiting the insert 5. The insert 5 is then secured with bolts. When the insert 5 needs to be released, press the insert again. The frame 5 is used to move the guide wheel 414. The guide wheel 414 can then move along the third guide edge and the fourth guide edge. After the operator stops applying pressure, the moving seat 46 moves upward with the cooperation of the limit spring 45 and the torsion spring, thus completing the unlocking operation. When air cooling is required, the ventilation device 112 starts to work. The airflow generated can be discharged through the gap between the first curved path pipe 1131, the second curved path pipe 1132, the third curved path pipe 1133, and the fourth curved path pipe 1134 and the first curved path pipe 1131. Because the gap is small, the airflow speed is large when the gas passes through the gap. Therefore, after the airflow passes through the gap, it can not only transport gas into the gas channel, but also carry the surrounding airflow into the gas channel.

[0069] When oil injection is required, the lubricating oil delivered at this time can enter the space between the upper housing 121 and the lower housing 122 through the oil inlet 123. As the injection volume increases, the lubricating oil moves along the gap between the transition plate 129 and the upper housing 121, and is discharged from the oil outlet 1213. At this time, the direction of the lubricating oil spray is the circumferential direction of the self-aligning roller bearing 10. At this time, the lubricating oil can contact the rollers of the self-aligning roller bearing 10, thereby lubricating the rollers in the self-aligning roller bearing 10. Then, by starting the propulsion cylinder 124, the second limit seat 1210 and the third limit seat 1211 can be moved down. At this time, the transition plate 129 abuts against the sealing gasket, and the third limit seat 1211 moves away from the lower housing 122. At this time, the lubricating oil is sprayed out from the axial direction of the lower housing 122, thereby allowing the lubricating oil to contact the rotating shaft 3, thereby completing the lubrication work between the rotating shaft 3 and the inner ring of the self-aligning roller bearing 10, ensuring that the pump body can operate smoothly.

[0070] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present invention, various equivalent transformations can be made to the technical solutions of the present invention, and all such equivalent transformations fall within the protection scope of the present invention.

Claims

1. An axial magnetic field enhanced magnetohydrodynamic sealing structure, characterized in that, include: A rotating shaft (3), a bushing (210) and a bushing (28) sequentially fitted on the rotating shaft (3), a housing (21) connected to the bushing (28) and fitted on the rotating shaft (3), a pressure plate (27) for connecting the housing (21) and the bushing (28), a placement cavity formed between the pressure plate (27), the housing (21) and the bushing (28), and a sealing mechanism (2) provided in the placement cavity; The sealing mechanism (2) includes a magnet (23) built into the placement cavity, two magnetic shielding rings (24) symmetrically arranged on the magnet (23), two water-blocking rings (29) symmetrically arranged on the magnetic shielding rings (24), a sealing plate (26) abutting against one of the water-blocking rings (29), and an air-sealing unit (22) arranged on the housing (21). The sealing plate (26) contacts the pressure plate (27), and the pressure plate (27) is fixedly installed on the housing (21) by bolts; Another water-blocking ring (29) is connected to the housing (21); the magnetic pole direction of the magnet (23) is the axial direction of the rotating shaft (3); The bushing (28) is provided with a spiral groove, which has an overlapping area with the magnet (23), and the spiral groove is filled with a magnetic fluid.

2. A pump body, characterized in that: Includes the axial magnetic field enhanced magnetohydrodynamic sealing structure as described in claim 1; It also includes a support shell (1) sleeved on the housing (21), a gas channel and a liquid channel respectively opened in the housing (21), an air inlet and an air outlet respectively connected to the gas channel, an air inlet (11) connected to the air inlet, a water inlet end set at one end of the liquid channel, a connecting pipe (8) connected to the other end of the liquid channel, a drain pipe (9) connected to the connecting pipe (8), an oil injection unit (12) set on the support shell (1) for injecting lubricating oil, an installation unit (4) fixedly installed on the support shell (1), a bracket (5) inserted into the installation unit (4), and a liquid inlet (6) set on the bracket (5). By cooperating with the bracket (5) and the mounting unit (4), the liquid inlet (6) is positioned in the water inlet end, and the injection of cooling water is completed.

3. The pump body according to claim 2, characterized in that: The inlet nozzle (6) is also provided with a guide block (7); The inlet end of the inlet nozzle (6) is a neck-shaped inlet. The inner wall of the inlet nozzle (6) is provided with multiple interconnected frustum-shaped chambers. The bottom of the frustum-shaped chambers is concave in the direction of the inlet. The front end of the guide block (7) is a conical structure. The guide block (7) is provided with an annular groove. Adjacent annular grooves are connected by curved surfaces. By positioning the guide block (7) in the inlet nozzle (6) and spacing the annular groove between the bottom of the frustum-shaped chamber and leaving a gap between them, the gap has unidirectional conductivity.

4. The pump body according to claim 3, characterized in that: The installation unit (4) includes a fixed seat (47) embedded in the support shell (1), a limiting shaft (44) fixedly disposed on the fixed seat (47), a limiting spring (45) sleeved on the limiting shaft (44), a movable seat (46) connected to the limiting spring (45), a driving part disposed on the movable seat (46), a limiting block (49) connected to the movable seat (46), a limiting groove (48) opened on the fixed seat (47), and a first protrusion (42) and a second protrusion (43) disposed on the inner wall of the fixed seat (47). There is a guide channel between the first protrusion (42) and the second protrusion (43) for the movement of the drive unit; The limiting block (49) is located in the limiting groove (48).

5. The pump body according to claim 4, characterized in that: The drive unit includes a pressing block (411) disposed on the movable seat (46), two elastic clamps (412) symmetrically disposed on the pressing block (411), a rotating seat (410) disposed on the movable seat (46), a rocker arm (413) movably connected to the rotating seat (410), a guide wheel (414) disposed on the rocker arm (413), and a torsion spring disposed between the rotating seat (410) and the rocker arm (413); The front view of the first protrusion (42) is arrow-shaped, including a first guide edge, a second guide edge, a third guide edge, a fourth guide edge and a fifth guide edge; There is an included angle between adjacent guide edges, and there is an arc-shaped transition edge between the second guide edge and the third guide edge; The front view of the second protrusion (43) includes an inverted trapezoidal groove and an inclined surface connected to one of the inclined sides of the inverted trapezoidal groove; The guide channel has a Z-shaped structure; the insertion area on the bracket (5) has an inverted T-shaped structure; By positioning the guide wheel (414) on the arc transition edge, the elastic clamp (412) completes the limiting and locking of the insert (5).

6. The pump body according to claim 5, characterized in that: The air intake (11) includes an air intake pipe (113) connected to the support shell (1), a support frame (111) connected to the air intake pipe (113), a ventilation device (112) mounted on the support frame (111), and a vent hole mounted on the air intake pipe (113) and facing the ventilation device (112); the air intake pipe (113) has an annular structure. The cross-sectional view of the intake pipe (113) includes a first curved path pipe (1131), a second curved path pipe (1132) and a fourth curved path pipe (1134) respectively disposed on both sides of the first curved path pipe (1131), and a third curved path pipe (1133) connected to the second curved path pipe (1132). The end of the fourth curved path tube (1134) bends toward the first curved path tube (1131), and the third curved path tube (1133) moves toward the first curved path tube (1131), with a gap between them.

7. The pump body according to claim 6, characterized in that: The oil injection unit (12) includes a lower housing (122) fixedly installed in the support housing (1), an upper housing (121) screwed to the lower housing (122), an adjusting member disposed in the upper housing (121) and passing through the lower housing (122), and an oil inlet (123) disposed on the upper housing (121).

8. The pump body according to claim 7, characterized in that: The adjusting component includes a propulsion cylinder (124) fixedly mounted on the upper housing (121), a propulsion rod (127) connected to the output end of the propulsion cylinder (124), a transition plate (129) sleeved on the propulsion rod (127), a second limiting seat (1210) and a third limiting seat (1211) respectively sleeved on the propulsion rod (127), and a return spring (1212) for connecting the transition plate (129) and the lower housing (122). The second limiting seat (1210) is located inside the lower housing (122), and the third limiting seat (1211) is located outside the lower housing (122); Multiple oil passage holes are evenly distributed on the transition plate (129).

9. The pump body according to claim 8, characterized in that: The adjusting component also includes a limiting chamber (128) disposed on the upper housing (121), an abutment seat (126) built into the limiting chamber (128), and a plurality of oil outlet grooves (1213) opened in the circumferential direction of the upper housing (121). One end of the lower housing (122) extends into the upper housing (121), and a sealing gasket is provided on the lower housing (122); there are gaps between the limiting chamber (128) and the upper housing (121) as well as between the transition plate (129) and the upper housing (121).

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