Axial magnetic field enhanced magnetic fluid seal structure and pump body

Abstract

The application relates to the technical field of magnetic fluid sealing, and discloses an axial magnetic field enhanced magnetic fluid sealing structure and a pump body, the sealing structure comprising a rotating shaft, a bushing 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 used for connecting the shell and the shaft sleeve, a placement cavity formed among the pressing plate, the shell and the shaft sleeve, and a sealing mechanism arranged in the placement cavity; the shell is arranged to form the placement cavity between the shell and the bushing, the magnet is arranged in the placement cavity, a magnetic isolation ring, a water blocking ring and a sealing plate are arranged, the placement cavity can be preliminarily sealed through the sealing plate, water flow can be prevented from entering the placement cavity through the sealing plate and the water blocking ring, and the water flow can be prevented from gathering through the water blocking ring, so that damage of 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 are difficult to meet the needs 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, close to the side of the vacuum cavity; a transmission bearing is arranged on the upper edge of the additional magnetic ring and 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 existing 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] Further, the sealing mechanism comprises a magnet arranged in the placing 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 arranged on the shell;

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

[0012] The other water blocking ring is connected with the shell; and the magnetic pole direction of the magnet is the axial direction of the rotating shaft;

[0013] The shaft sleeve is provided with a spiral groove, the spiral groove has an overlapping area with the magnet, and the spiral groove is filled with a magnetic fluid.

[0014] A pump body comprises an axial magnetic field enhanced magnetic fluid sealing structure;

[0015] Further, the pump body comprises a supporting shell sleeved on the shell, a gas channel and a liquid channel respectively arranged in the shell, a gas inlet nozzle and a gas outlet nozzle respectively in communication with the gas channel, a gas inlet portion connected with the gas inlet nozzle, a water inlet end arranged at one end of the liquid channel, a connecting pipe in communication with the other end of the liquid channel, a water outlet pipe in communication with the connecting pipe, an oil injection unit arranged on the supporting shell for lubricating oil injection, an installation unit fixedly installed on the supporting shell, a plug-in rack inserted with the installation unit, and a liquid inlet nozzle arranged on the plug-in rack;

[0016] Through cooperation of the plug-in rack and the installation unit, the liquid inlet nozzle is located in the water inlet end, and the injection of cooling water is completed;

[0017] The air sealing unit is a prior art, and through cooperation with the sealing mechanism and by introducing a specific gas, the sealing performance of the rotating shaft is improved by cooperation of the magnetic fluid; and the water inlet end is provided with a sealing gasket.

[0018] Further, the liquid inlet nozzle is further provided with a guide block;

[0019] The liquid inlet end of the liquid inlet nozzle is a neck-shaped water inlet, the inner wall of the liquid inlet nozzle is provided with a plurality of connected circular truncated cone cavities, and the bottom of the circular truncated cone cavity is recessed by a certain radian towards the water inlet; the front end of the guide block is a conical structure, and the guide block is provided with an annular groove, and adjacent annular grooves are connected by curved surfaces;

[0020] The guide block is located in the liquid inlet nozzle, and the annular grooves and the bottom of the circular truncated cone cavity are arranged at intervals and have a gap therebetween, so that the gap has a one-way conduction property.

[0021] Further, the mounting unit comprises a fixing seat embedded in the support shell, a limiting shaft fixedly arranged on the fixing seat, a limiting spring sleeved on the limiting shaft, a moving seat connected with the limiting spring, a driving part arranged on the moving seat, a limiting block connected with the moving seat, a limiting groove arranged on the fixing seat, and a first protrusion and a second protrusion arranged on the inner wall of the fixing seat;

[0022] The first protrusion and the second protrusion are provided with a guide channel for the movement of the driving part;

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

[0024] Further, the driving part comprises a pressing block arranged on the moving seat, two elastic clamps symmetrically arranged on the pressing block, a rotating seat arranged on the moving seat, a rocker arm movably connected with the rotating seat, a guide wheel arranged on the rocker arm, and a torsion spring arranged between the rotating seat and the rocker arm.

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

[0026] An included angle is formed between adjacent guide edges, and the second guide edge and the third guide edge are provided with an arc-shaped transition edge.

[0027] The front view of the second protrusion comprises an inverted trapezoidal groove and an inclined surface connected with an inclined edge of the inverted trapezoidal groove.

[0028] The guide channel is in a Z-shaped structure, and the plug-in area on the plug-in frame is in an inverted T-shaped structure.

[0029] By locating the guide wheel on the arc-shaped transition edge, the elastic clamp can complete the limiting locking of the plug-in frame.

[0030] Further, the air inlet part comprises an air inlet pipe connected with the support shell, a support frame connected with the air inlet pipe, a ventilation device arranged on the support frame, and a ventilation hole arranged on the air inlet pipe and opposite to the ventilation device; the air inlet pipe is in a ring-shaped structure.

[0031] In the graph corresponding to the cross-sectional view of the air inlet pipe, a first curved path pipe is arranged, a second curved path pipe and a fourth curved path pipe are arranged on both sides of the first curved path pipe respectively, and a third curved path pipe is connected with the second curved path pipe.

[0032] The end of the fourth curved path pipe is bent towards the first curved path pipe, the third curved path pipe is close to the first curved path pipe, and a gap is formed between the two.

[0033] Further, the oil injection unit comprises a lower casing fixedly installed in the support shell, an upper casing screwed with the lower casing, an adjusting member arranged in the upper casing and penetrating through the lower casing, and an oil inlet arranged on the upper casing;

[0034] The ventilation device comprises, but is not limited to, a fan and a rotating motor connected with the fan.

[0035] Further, the adjusting member comprises a push cylinder fixedly installed on the upper casing, a push rod connected with an output end of the push cylinder, a transition disc sleeved on the push rod, a second limiting seat and a third limiting seat respectively sleeved on the push rod, and a reset spring for connecting the transition disc and the lower casing.

[0036] The second limiting seat is located in the lower casing, and the third limiting seat is located outside the lower casing.

[0037] A plurality of oil passing holes are uniformly arranged on the transition disc.

[0038] Further, the adjusting member further comprises a limiting chamber arranged on the upper casing, an abutting seat built-in the limiting chamber, and a plurality of oil outlet grooves opened in the circumferential direction of the upper casing.

[0039] One end of the lower casing extends into the upper casing, and a sealing gasket is arranged on the lower casing; gaps exist between the limiting chamber and the upper casing and between the transition disc and the upper casing.

[0040] Beneficial effects: The application discloses an axial magnetic field enhanced magnetic fluid sealing structure and a pump body. In order to avoid that the cooling liquid enters the placing cavity, the device is provided with a magnet built-in the placing 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 a gas sealing unit arranged on the shell. The sealing plate is in contact with a pressing plate, and the pressing plate is fixedly installed on the shell through bolts. The other water blocking ring is connected with the shell. The magnetic pole direction of the magnet is the axial direction of the rotating shaft. The shaft sleeve is provided with a spiral groove, the spiral groove has an overlapping area with the magnet, and the spiral groove is filled with magnetic fluid. The shell is arranged to form a placing cavity between the shell and the bushing. The magnet is built-in the placing cavity, and the magnetic shielding ring, the water blocking ring and the sealing plate are arranged. The placing cavity is preliminarily sealed through the sealing plate. The water flow is prevented from entering the placing cavity through the sealing plate and the water blocking ring. The water flow is prevented from gathering through the water blocking ring, so that the device is prevented from being damaged. BRIEF DESCRIPTION OF DRAWINGS

[0041] Figure 1is a sectional view of an axial magnetic field enhanced magnetic fluid sealing structure of the present application;

[0042] Figure 2 is a schematic diagram of a mounting unit structure of the present application;

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

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

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

[0046] Figure 6 is a schematic diagram of an insertion frame of the present application;

[0047] Figure 7 is a schematic diagram of an air inlet portion of the present application;

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

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

[0050] BRIEF DESCRIPTION OF DRAWINGS: 1, support shell; 2, sealing mechanism; 21, shell; 22, gas seal unit; 23, magnet; 24, magnetic isolation ring; 25, water throwing ring; 26, sealing plate; 27, pressing plate; 28, shaft sleeve; 29, water blocking 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 chuck; 413, rocker arm; 414, guide wheel; 5, insertion frame; 6, liquid inlet nozzle; 7, guide block; 8, connecting pipe; 9, drain pipe; 10, self-aligning roller bearing; 11, air inlet portion; 111, support frame; 112, ventilation equipment; 113, air inlet pipe; 1131, first curved path pipe; 1132, second curved path pipe; 1133, third curved path pipe; 1134, fourth curved path pipe; 12, oil injection unit; 121, upper shell; 122, lower shell; 123, oil inlet; 124, push air cylinder; 126, abutting seat; 127, push rod; 128, limiting chamber; 129, transition disc; 1210, second limiting seat; 1211, third limiting seat; 1212, return spring; 1213, oil outlet groove. DETAILED DESCRIPTION

[0051] In order to make the above-mentioned objectives, features and advantages of the present application more apparent and easy to understand, the specific embodiments of the present application 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 throughout 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] The application relates to a pump body, which comprises an axial magnetic field enhanced magnetic fluid sealing structure; further comprises a supporting shell 1 sleeved on the shell 21, a gas passage and a liquid passage respectively arranged in the shell 21, an air inlet nozzle and an air outlet nozzle respectively communicated with the gas passage, an air inlet part 11 connected with the air inlet nozzle, a water inlet end arranged at one end of the liquid passage, a connecting pipe 8 communicated with the other end of the liquid passage, a water outlet pipe 9 communicated with the connecting pipe 8, an oil injection unit 12 arranged on the supporting shell 1 for lubricating oil injection, a mounting unit 4 fixedly mounted on the supporting shell 1, a plug frame 5 inserted with the mounting unit 4, and a liquid inlet nozzle 6 arranged on the plug frame 5; the liquid inlet nozzle 6 is located in the water inlet end through the cooperation of the plug frame 5 and the mounting unit 4, and the injection of cooling water is completed; the gas passage and the liquid passage are both existing technologies, namely two independent annular through holes, which can reduce the temperature of the pump body when the gas or cooling liquid flows, so that the magnet can be kept at a certain temperature, the magnetism of the magnet 23 is prevented from being changed due to high temperature, and the magnetic fluid sealing effect is prevented from being reduced; the cooperation between the plug frame 5 and the mounting unit 4 can simultaneously complete the mounting work of at least two liquid inlet nozzles 6, so that the cooling liquid can smoothly enter the pump body, and the working temperature of the pump body is adjusted.

[0058] The liquid inlet nozzle 6 is further provided with a guide block 7; the liquid inlet end of the liquid inlet nozzle 6 is a neck-shaped water inlet, the inner wall of the liquid inlet nozzle 6 is provided with a plurality of communicated circular truncated cone chambers, the bottom of the circular truncated cone chamber is recessed by a certain radian towards the water inlet direction, the front end of the guide block 7 is a conical structure, and the guide block 7 is provided with annular grooves, and the adjacent annular grooves are connected through curved surfaces; the guide block 7 is located in the liquid inlet nozzle 6, and the annular grooves and the bottom of the circular truncated cone chamber are spaced apart and have a gap therebetween, so that the gap has one-way conduction.

[0059] When the injection work of the cooling liquid is needed, the liquid inlet nozzle 6 is mounted in the water inlet end through the cooperation of the plug frame 5 and the mounting unit 4, and then the injection work of the cooling liquid is carried out through the liquid inlet nozzle 6; in the process, the neck-shaped water inlet can accelerate the cooling liquid when the cooling liquid enters the liquid inlet nozzle 6, and then the water flow can flow out from the other end of the liquid inlet nozzle 6 along the gap; when the liquid conveying work needs to be stopped, a certain negative pressure is generated in the conveying pipe, the negative pressure carries a certain amount of liquid from the water outlet of the liquid inlet nozzle 6 to the water inlet, and in the process, the water flow is divided into a main flow channel and a secondary flow channel, and the recessed bottom of the circular truncated cone chamber hinders the water flow in the secondary flow channel, so that the backflow of the cooling liquid is reduced.

[0060] The mounting unit 4 comprises a fixing seat 47 embedded in the support shell 1, a limiting shaft 44 fixedly arranged on the fixing seat 47, a limiting spring 45 sleeved on the limiting shaft 44, a moving seat 46 connected with the limiting spring 45, a driving part arranged on the moving seat 46, a limiting block 49 connected with the moving seat 46, a limiting groove 48 opened on the fixing seat 47, and a first protrusion 42 and a second protrusion 43 arranged on the inner wall of the fixing seat 47; the first protrusion 42 and the second protrusion 43 are provided with a guide channel for the movement of the driving part; the limiting block 49 is located in the limiting groove 48; the driving part comprises a pressing block 411 arranged on the moving seat 46, two elastic clamps 412 symmetrically arranged on the pressing block 411, a rotating seat 410 arranged on the moving seat 46, a rocker arm 413 movably connected with the rotating seat 410, a guide wheel 414 arranged on the rocker arm 413, and a torsional spring arranged between the rotating seat 410 and the rocker arm 413; the front view of the first protrusion 42 is arrow-shaped and comprises a first guide edge, a second guide edge, a third guide edge, a fourth guide edge and a fifth guide edge; an included angle is formed between adjacent guide edges, and the second guide edge and the third guide edge are provided with an arc-shaped transition edge; the front view of the second protrusion 43 comprises an inverted trapezoidal groove and an inclined surface connected with a slope of the inverted trapezoidal groove; the guide channel is in a Z-shaped structure; the insertion area of the insertion frame 5 is in an inverted T-shaped structure; by locating the guide wheel 414 on the arc-shaped transition edge, the elastic clamp 412 can complete the limiting locking of the insertion frame 5;

[0061] When the liquid inlet nozzle 6 needs to be installed, the insertion frame 5 is pressed at this time, so that the insertion frame 5 abuts against the pressing block 411 and penetrates with the pressing, so that the pressing block 411 can be close to the limiting shaft 44; in the movement process of the pressing block 411, the guide wheel 414 is in contact with the first guide edge, and penetrates with the pressing, so that the guide wheel 414 can move on the first guide edge; when the guide wheel 414 is located at the bottom end, the guide wheel 414 is no longer pressed at this time, and under the cooperation of the torsional spring and the limiting spring 45, the guide wheel 414 can be located on the second guide edge and finally located at the arc-shaped transition edge; in the descending process of the moving seat 46, the elastic clamp 412 is deformed, so as to complete the clamping and limiting work of the insertion frame 5, and then the fixing work is completed through the bolt;

[0062] The first protrusion 42 is arranged to fix and lock the guide wheel 414, ensure the smooth installation, realize the quick pre-positioning of the liquid injection nozzle and the pump body by pressing, avoid the manual alignment of the bolt holes, greatly reduce the alignment time, and then fix again by the bolt, enhance the connection strength by the mechanical locking of the screw thread, and avoid the loosening risk of the simple pressing structure.

[0063] The air inlet part 11 comprises an air inlet pipe 113 connected with the support shell 1, a support frame 111 connected with the air inlet pipe 113, a ventilation device 112 arranged on the support frame 111, and a ventilation hole arranged on the air inlet pipe 113 and opposite to the ventilation device 112; the air inlet pipe 113 is in a ring structure; in the profile view of the air inlet pipe 113, a first curved path pipe 1131 is included, a second curved path pipe 1132 and a fourth curved path pipe 1134 are arranged on both sides of the first curved path pipe 1131 respectively, and a third curved path pipe 1133 is connected with the second curved path pipe 1132; the fourth curved path pipe 1134 is bent at the end towards the first curved path pipe 1131, and the third curved path pipe 1133 is close to the first curved path pipe 1131, and a gap is formed between the two;

[0064] When the air cooling work is needed, the ventilation device 112 starts to work, so that the generated air flow can flow along the first curved path pipe 1131, the second curved path pipe 1132, the third curved path pipe 1133, and be discharged from the gap between the fourth curved path pipe 1134 and the first curved path pipe 1131; since the gap is small, the air flow speed is large when the air flow passes through the gap, so that after the air flow passes through the gap, not only the air flow work in the gas passage can be carried out, but also the surrounding air flow can be carried into the gas passage, so that the actual air flow into the gas passage is much larger than the air flow generated by the ventilation device 112, and the ventilation device 112 with high power is avoided to obtain large air flow, so that the vibration of the pump body during work is too large.

[0065] In order to complete the oil injection work of the self-aligning roller bearing 10, since the self-aligning roller bearing 10 comprises at least two oppositely arranged double-row rollers in the shape of a circular truncated cone, an oil injection unit 12 is arranged in the device, the oil injection unit 12 comprises a lower housing 122 fixedly installed in the support shell 1, an upper housing 121 screwed with the lower housing 122, an adjusting member arranged in the upper housing 121 and penetrating through the lower housing 122, and an oil inlet 123 arranged on the upper housing 121; the adjusting member comprises a push cylinder 124 fixedly installed on the upper housing 121, a push rod 127 connected with the output end of the push cylinder 124, a transition disc 129 sleeved on the push rod 127, a second limiting seat 1210 and a third limiting seat 1211 respectively sleeved on the push rod 127, and a return spring 1212 for connecting the transition disc 129 and the lower housing 122; the second limiting seat 1210 is located in the lower housing 122, and the third limiting seat 1211 is located outside the lower housing 122; a plurality of oil passing holes are uniformly arranged on the transition disc 129; the adjusting member further comprises a limiting chamber 128 arranged on the upper housing 121, an abutting seat 126 built-in 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 arranged on the lower housing 122; there are gaps between the limiting chamber 128 and the upper housing 121 and between the transition disc 129 and the upper housing 121;

[0066] When the oil injection work is needed, at this time the lubricating oil conveyed can enter between the upper housing 121 and the lower housing 122 through the oil inlet 123, along with the increase of the injection amount, at this time the lubricating oil moves along the gap between the transition disc 129 and the upper housing 121, and is discharged from the oil outlet grooves 1213, at this time the ejection direction of the lubricating oil 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, so as to lubricate the rollers in the self-aligning roller bearing 10, then the push cylinder 124 is started to work, so as to make the second limiting seat 1210 and the third limiting seat 1211 move downward, at this time the transition disc 129 abuts against the sealing gasket, and the third limiting seat 1211 is away from the lower housing 122, at this time the lubricating oil is ejected from the lower housing 122 in the axial direction, and then the lubricating oil can contact the rotating shaft 3, so as to complete the lubrication work between the rotating shaft 3 and the inner ring of the self-aligning roller bearing 10, and ensure that the pump body can run smoothly.

[0067] Principle: when the need for cooling liquid injection work, at this time by the bracket 5 and the installation unit 4 cooperation, liquid inlet nozzle 6 installation, liquid inlet nozzle 6 in the water inlet end, then through the liquid inlet nozzle 6 cooling liquid injection work, in the process, due to the setting of the neck water inlet, cooling liquid into the liquid inlet nozzle 6, can play a certain acceleration effect, then the flow from the gap can be out of the liquid inlet nozzle 6 the other end, when the need to stop the liquid delivery work, at this time the delivery pipe will produce a certain amount of negative pressure, at this time the negative pressure will carry a certain amount of liquid from the water outlet of the liquid inlet nozzle 6 to the water inlet, and in the process, will make the flow into the main flow channel and the secondary flow channel, and due to the concave of the bottom of the circular cone cavity, the secondary flow channel will hinder the flow in the main flow channel;

[0068] In need to install the liquid inlet nozzle 6 work, at this time press the bracket 5, make the bracket 5 and press the block 411 abutment, and with the press in, so that the press block 411 can be close to the limit shaft 44, at this time in the process of press block 411 movement, will make the guide wheel 414 and the first guide edge contact, and with the press in, so that the guide wheel 414 can move on the first guide edge, when the guide wheel 414 is located at the bottom, at this time no longer to exert pressure, at this time in the cooperation of torsional spring and limit spring 45, make the guide wheel 414 can be located in the second guide edge, finally located in the arc transition edge, in the process of moving seat 46 down, elastic chuck 412 deformation, so as to complete the clamping limit work of bracket 5, and then fixed by bolt work; When the bracket 5 needs to be separated, at this time press the bracket 5 again, so that the guide wheel 414 moves, then the guide wheel 414 can move along the third guide edge and the fourth guide edge, so that after the operator no longer exert pressure, at this time in the cooperation of limit spring 45 and torsional spring, moving seat 46 up, so as to complete the unlocking work; When the need for air cooling work, at this time the ventilation equipment 112 starts to work, so that the flow can be discharged along the first curve path pipe 1131, second curve path pipe 1132, third curve path pipe 1133 and the gap between the fourth curve path pipe 1134 and the first curve path pipe 1131, because the gap is small, so when the gas passes through the gap, the speed of the gas flow is large, so after the gas flow passes through the gap, it can not only carry out gas conveying work in the gas channel, but also carry the surrounding gas flow into the gas channel;

[0069] When oil injection needs to be performed, the delivered lubricating oil can enter between the upper housing 121 and the lower housing 122 through the oil inlet 123 at this time, and as the injection amount increases, the lubricating oil moves along the gap between the transition disc 129 and the upper housing 121, and is discharged from the oil outlet groove 1213, at this time, the ejection direction of the lubricating oil 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 being able to lubricate the rollers in the self-aligning roller bearing 10, and then by starting the work of the push cylinder 124, the second limiting seat 1210 and the third limiting seat 1211 can be moved downward, at this time, the transition disc 129 abuts against the sealing gasket, and the third limiting seat 1211 is away from the lower housing 122, at this time, the lubricating oil is ejected in the axial direction of the lower housing 122, and then the lubricating oil can contact the rotating shaft 3, thereby completing the lubrication between the rotating shaft 3 and the inner ring of the self-aligning roller bearing 10, and ensuring that the pump body can run smoothly.

[0070] The preferred embodiments of the present application are described in detail above in combination with the drawings, but the present application is not limited to the specific details in the above-described embodiments, and various equivalent transformations can be made to the technical solutions of the present application within the technical concept of the present application, and these equivalent transformations all belong to the protection scope of the present application.

Claims

1. A pump body, characterized by: The application relates to an axial magnetic field enhanced magnetic fluid sealing structure. The axial magnetic field enhanced magnetic fluid sealing structure comprises a rotating shaft (3), a bushing (210) and a shaft sleeve (28) which are sequentially sleeved on the rotating shaft (3), a shell (21) which is connected with the shaft sleeve (28) and is sleeved on the rotating shaft (3), a pressing plate (27) for connecting the shell (21) and the shaft sleeve (28), a placing cavity which is formed among the pressing plate (27), the shell (21) and the shaft sleeve (28), and a sealing mechanism (2) which is arranged in the placing cavity. The sealing mechanism (2) comprises a magnet (23) which is arranged in the placing cavity, two magnetic shielding rings (24) which are symmetrically arranged on the magnet (23), two water blocking rings (29) which are symmetrically arranged on the magnetic shielding rings (24), a sealing plate (26) which is in abutment with one of the water blocking rings (29), and an air sealing unit (22) which is arranged on the shell (21). The sealing plate (26) is in contact with the pressing plate (27), and the pressing plate (27) is fixedly installed on the shell (21) through bolts. The other water blocking ring (29) is connected with the shell (21), and the magnetic pole direction of the magnet (23) is the axial direction of the rotating shaft (3). A spiral groove is arranged on the shaft sleeve (28), the spiral groove has an overlapping area with the magnet (23), and the spiral groove is filled with magnetic fluid. The application further comprises a supporting shell (1) which is sleeved on the shell (21), a gas channel and a liquid channel which are respectively arranged in the shell (21), an air inlet nozzle and an air outlet nozzle which are respectively in communication with the gas channel, an air inlet part (11) which is connected with the air inlet nozzle, a water inlet end which is arranged at one end of the liquid channel, a connecting pipe (8) which is in communication with the other end of the liquid channel, a water outlet pipe (9) which is in communication with the connecting pipe (8), an oil injection unit (12) which is arranged on the supporting shell (1) and is used for injecting lubricating oil, a mounting unit (4) which is fixedly installed on the supporting shell (1), a plug frame (5) which is plugged with the mounting unit (4), and a liquid inlet nozzle (6) which is arranged on the plug frame (5). Through cooperation of the plug frame (5) and the mounting unit (4), the liquid inlet nozzle (6) is located in the water inlet end, and the injection work of cooling water is completed. The mounting unit (4) comprises a fixing seat (47) which is embedded in the supporting shell (1), a limiting shaft (44) which is fixedly arranged on the fixing seat (47), a limiting spring (45) which is sleeved on the limiting shaft (44), a moving seat (46) which is connected with the limiting spring (45), a driving part which is arranged on the moving seat (46), a limiting block (49) which is connected with the moving seat (46), a limiting groove (48) which is arranged on the fixing seat (47), and a first protrusion (42) and a second protrusion (43) which are arranged on the inner wall of the fixing seat (47). A guide channel for movement of the driving part is formed between the first protrusion (42) and the second protrusion (43). The limiting block (49) is located in the limiting groove (48). The driving part comprises a pressing block (411) arranged on the moving seat (46), two elastic clamps (412) symmetrically arranged on the pressing block (411), a rotating seat (410) arranged on the moving seat (46), a rocker arm (413) movably connected with the rotating seat (410), a guide wheel (414) arranged on the rocker arm (413), and a torsion spring arranged between the rotating seat (410) and the rocker arm (413); The first protrusion (42) is in the shape of an arrow, comprising a first guide edge, a second guide edge, a third guide edge, a fourth guide edge and a fifth guide edge; An included angle exists between adjacent guide edges, and an arc-shaped transition edge exists between the second guide edge and the third guide edge; The second protrusion (43) comprises an inverted trapezoidal groove and an inclined surface connected with an inclined edge of the inverted trapezoidal groove; The guide channel is in a Z-shaped structure, and the plug-in area on the plug-in frame (5) is in an inverted T-shaped structure; By locating the guide wheel (414) on the arc-shaped transition edge, the elastic clamp (412) can complete the limiting locking of the plug-in frame (5).

2. The pump body of claim 1, wherein: The liquid inlet nozzle (6) is further provided with a guide block (7); The liquid inlet end of the liquid inlet nozzle (6) is a neck-shaped water inlet, the inner wall of the liquid inlet nozzle (6) is provided with a plurality of connected circular truncated cone chambers, the bottom of the circular truncated cone chamber is recessed with an arc towards the water inlet, the front end of the guide block (7) is in a conical structure, and the guide block (7) is provided with annular grooves, adjacent annular grooves are connected by curved surfaces; By locating the guide block (7) in the liquid inlet nozzle (6) and spacing the annular grooves and the bottom of the circular truncated cone chamber and reserving a gap therebetween, the gap has one-way conductivity.

3. The pump body of claim 2, wherein: The air inlet part (11) comprises an air inlet pipe (113) connected with the support shell (1), a support frame (111) connected with the air inlet pipe (113), a ventilation device (112) arranged on the support frame (111), and an air hole arranged on the air inlet pipe (113) and opposite to the ventilation device (112); the air inlet pipe (113) is in a ring structure; The air inlet pipe (113) comprises a first curved path pipe (1131), a second curved path pipe (1132) and a fourth curved path pipe (1134) arranged on both sides of the first curved path pipe (1131) respectively, and a third curved path pipe (1133) connected with the second curved path pipe (1132); The end of the fourth curved path pipe (1134) is bent towards the first curved path pipe (1131), the third curved path pipe (1133) is close to the first curved path pipe (1131), and a gap exists between them.

4. The pump body of claim 3, wherein: The oil injection unit (12) comprises a lower shell (122) fixedly installed in the support shell (1), an upper shell (121) screwed with the lower shell (122), an adjusting piece arranged in the upper shell (121) and penetrating through the lower shell (122), and an oil inlet (123) arranged on the upper shell (121).

5. The pump body of claim 4, wherein: The adjusting member comprises a push cylinder (124) fixedly installed on the upper shell (121), a push rod (127) connected with an output end of the push cylinder (124), a transition disc (129) sleeved on the push rod (127), a second limiting seat (1210) and a third limiting seat (1211) respectively sleeved on the push rod (127), and a reset spring (1212) for connecting the transition disc (129) and the lower shell (122); The second limiting seat (1210) is located in the lower shell (122), and the third limiting seat (1211) is located outside the lower shell (122); A plurality of oil passing holes are uniformly arranged on the transition disc (129).

6. The pump body of claim 5, wherein: The adjusting member further comprises a limiting chamber (128) arranged on the upper shell (121), an abutting seat (126) arranged in the limiting chamber (128), and a plurality of oil outlet grooves (1213) circumferentially arranged on the upper shell (121); One end of the lower shell (122) extends into the upper shell (121), and a sealing gasket is arranged on the lower shell (122); gaps exist between the limiting chamber (128) and the upper shell (121) and between the transition disc (129) and the upper shell (121).

Images