Pump body with transmission type magnetic coupler integrated impeller structure

Abstract

The invention relates to the field of impeller pumps, discloses a pump body with a penetration type magnetic coupler integrated impeller structure, and aims to solve the problems of insufficient overload protection, non-adjustable magnetic coupling strength and the like in a traditional magnetic coupling pump. According to the pump body, the adjustable magnetic block adjusting mechanism and the control mechanism are arranged at the output end of the motor, the gap between the inner magnetic steel and the outer magnetic steel can be flexibly adjusted, complex working conditions such as high impurity content in fluid, pipeline blockage or sudden pressure rise are effectively handled, and the impeller body is prevented from being damaged by excessive impact while efficient transmission is guaranteed. According to the technical scheme, the bearing, the thrust plate and the supporting system are reasonably designed, so that the stability and low friction of the pump body in high-speed rotation and high-load operation are ensured, the service life of equipment is prolonged, and meanwhile, the response sensitivity of overload protection is improved.

Description

Technical Field

[0001] The invention relates to the technical field of impeller pumps, in particular to a pump body with an integrated impeller structure of a penetrating magnetic coupler. Background Art

[0002] In the process of fluid transportation, magnetic coupling pumps are an important type of application equipment. They usually use an external motor to drive the internal magnetic components to rotate, thereby realizing contactless transmission of the impeller to transport the liquid from the inlet side to the outlet side. This type of magnetic coupling pump avoids the use of dynamic seals in traditional pump structures to a large extent, effectively reducing the risk of leakage and improving the overall operating safety of the equipment.

[0003] In the prior art, magnetic coupling pumps usually achieve stable power transmission by setting the relative position and gap between the inner and outer magnetic steels. However, when the impurity content in the conveying medium is high, or under abnormal working conditions such as pipeline blockage, the internal pressure of the pump body will increase dramatically in a short period of time. At this time, if the coupling strength between the inner and outer magnetic steels is always maintained at a high level, and a strong transmission torque is still maintained even in an overloaded state, it may cause the impeller body to continue to be subjected to excessive force in an obstructed state, which will not only make it difficult to release the overload pressure in time, but also have an adverse effect on the impeller body structure, and in severe cases may cause the impeller body to be broken and damaged.

[0004] At the same time, the existing magnetic coupling devices usually set the relative gap and position between the inner and outer magnets before leaving the factory. If rapid adjustments are required later according to the characteristics of the conveying medium or working conditions, it is more difficult. The adjustment mechanism is often complex in structure, and the adjustment accuracy and flexibility are insufficient, making it difficult for on-site operators to effectively control the coupling strength between the inner and outer magnets through simple operations when facing different media and different working environments (such as high-viscosity media, liquids containing impurities, or sudden pipeline blockages, etc.). The result of the lack of flexible regulation is that when the pipeline pressure rises suddenly or the conveying state is abnormal, the magnetic coupling strength between the inner and outer magnets cannot be reduced in time, making it difficult to quickly play an overload protection role. Summary of the invention

[0005] In view of the shortcomings of the prior art, the present invention provides a pump body with an integrated impeller structure with a penetrating magnetic coupler. By reasonably designing and adjusting the gap between the inner and outer magnetic steels, the overload protection sensitivity is improved, and the magnetic coupling strength can be flexibly and accurately controlled in practical applications.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: A pump body with an integrated impeller structure of a penetrating magnetic coupler, comprising a support mechanism and a motor, wherein the support mechanism comprises a support cylinder seat, the bottom of the support cylinder seat is fixed by bolts, the rear end of the support cylinder seat is fixed to the motor by bolts, heat dissipation holes are evenly opened on both sides of the support cylinder seat, a mounting cylinder is fixed to the output end of the motor, the mounting cylinder is placed inside the support cylinder seat, the hollow end inside the mounting cylinder is open, a magnetic block adjustment mechanism is installed inside the mounting cylinder, and the magnetic block adjustment mechanism is used to adjust the distance between the inner and outer magnetic steels; The surface of the support cylinder seat is provided with a boss, the surface of the boss is provided with a mounting hole, a control mechanism is installed inside the mounting hole, and the control mechanism is used to control the magnetic block adjustment mechanism; A mounting shell is installed at the front end of the support mechanism, a steel shaft is arranged at the center of the mounting shell, an inner magnetic steel is installed on the surface of the steel shaft, the inner magnetic steel is placed inside the mounting cylinder, an impeller body is arranged at the front end of the mounting shell, a pump casing is sealed at the front end of the support cylinder seat by bolts, and the impeller body is placed inside the pump casing.

[0007] Furthermore, the inner wall of the mounting tube is evenly provided with mounting grooves, an annular boss is provided at one end of the mounting tube close to the motor, fixing rods are evenly provided on the surface of the annular boss with the axis of the mounting tube as the center, and sliding groove openings are evenly provided on the rear end surface of the mounting tube, and the multiple sliding groove openings correspond one-to-one to the fixing rods.

[0008] Furthermore, a threaded rod is rotatably mounted on the surface of one of the fixing rods, a square hole is opened at the end of the threaded rod, and the end of the square hole is flush with the outer surface of the mounting tube.

[0009] Furthermore, the magnetic block adjustment mechanism includes a mounting bar evenly installed inside the mounting groove and a sleeve rotating on the motor output shaft, and an outer magnetic steel is provided on one side of the mounting bar close to the axis of the mounting cylinder, and the outer magnetic steel corresponds to the inner magnetic steel.

[0010] Furthermore, a connecting rod is provided at the rear end of the mounting bar, the connecting rod passes through the sliding groove, and a sliding block is provided at the rear end of the connecting rod. Multiple sliding blocks slide on the surface of the fixed rod, and one of the sliding blocks is screwed onto the threaded rod.

[0011] Furthermore, connecting rods are evenly hinged on the outer surface of the shaft sleeve, the connecting rods correspond to the mounting bars one by one, and the ends of the connecting rods away from the shaft sleeve are respectively hinged on the sliders.

[0012] Furthermore, the mounting hole corresponds to the axial position of the square hole, and the control mechanism includes a control shaft sliding inside the mounting hole, and a knob is provided at the end of the control shaft, and the knob is placed outside the support cylinder seat.

[0013] Furthermore, a docking square head is provided at one end of the control shaft away from the knob, the docking square head and the square hole are adapted to each other in size, a spring is sleeved on the surface of the docking square head, the spring is placed inside the mounting hole, and one end of the spring is in contact with the end surface of the control shaft.

[0014] Furthermore, a thrust plate is provided at the front end of the mounting shell, and the thrust plate is placed on the front side of the inner magnetic steel. A radial permanent magnetic bearing is installed inside the mounting shell, and the radial permanent magnetic bearing is placed corresponding to the rear end surface of the steel shaft. An axial permanent magnetic bearing is also installed inside the mounting shell, and the steel shaft passes through the axial permanent magnetic bearing.

[0015] The present invention provides a pump body with an integrated impeller structure of a penetrating magnetic coupler. It has the following beneficial effects: In this technical solution, by introducing a magnetic block adjustment mechanism and a control mechanism inside the pump body, the distance between the inner and outer magnets can be flexibly adjusted according to the medium characteristics and working conditions in the pipeline in actual use. Compared with the defects of the background technology that the magnetic coupling strength is fixed and difficult to adjust quickly, this design can quickly reduce the transmission torque by moderately increasing the gap between the inner and outer magnets when the impurity content in the fluid is high or the pressure suddenly increases due to pipeline blockage, thereby avoiding the impeller body from being damaged by excessive impact under overload conditions. This method of being able to preset the magnetic coupling strength before transportation and flexibly adjust it during use enables the pump body to have agile overload protection capabilities when facing sudden high-pressure conditions, thereby effectively solving the technical problem that the traditional structure cannot quickly weaken the magnetic coupling, which in turn causes the impeller body to break.

[0016] In this technical solution, by setting mounting grooves, annular bosses, fixed rods, sliding grooves, threaded rods, square holes and other components in the mounting cylinder at the output end of the motor, components such as sliders, connecting rods, connecting rods, bushings and mounting strips can be adjusted synchronously and linked at precise positions. When it is necessary to flexibly adjust the coupling strength of the internal and external magnetic steels according to the viscosity of the conveying medium, the impurity content and the pressure changes, the operator only needs to rotate or press down the control shaft to quickly engage the docking square head with the square hole, thereby driving the threaded rod and the slider to move precisely along the fixed rod, thereby achieving fine-tuning of the position of the external magnetic steel. Compared with the fixed coupling structure in the background technology, this solution can quickly and accurately adjust the magnetic coupling strength without complicated disassembly, solving the problem of insufficient flexibility of traditional pump bodies in dealing with changing working environments.

[0017] In this technical solution, low friction and high stability support of the entire transmission system is achieved by rationally arranging the steel shaft, internal magnetic steel, thrust plate at the front end, and radial and axial permanent magnetic bearings at the rear end inside the mounting shell. Compared with the situation in the background technology where it is difficult to balance high-speed rotation and high-load operation, this reasonable bearing and limit configuration ensures that the impeller body and transmission assembly can still maintain smooth operation during frequent adjustment of the magnetic coupling strength and dealing with complex media, and effectively extends the service life of the equipment. With the efficient coordination of these components, the equipment still has reliable load-bearing capacity and stability when it is subjected to high-pressure shocks or dealing with pipeline blockages, fundamentally solving the problem of traditional structures being vulnerable to damage and difficult to repair under high stress conditions.

[0018] To sum up, by introducing a magnetic block adjustment mechanism and a control mechanism that can flexibly adjust the gap between the internal and external magnetic steels, as well as a reasonably arranged support and bearing structure, this technical solution successfully solves the problems faced by traditional equipment when dealing with complex working conditions such as fluid impurities, pipeline blockage and sudden pressure increase, such as the inability to quickly adjust the magnetic coupling strength, the impeller body being easily damaged by excessive impact, and difficulty in adapting to a variety of media. This makes the pump body have better flexibility, reliability and adaptability in practical applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 It is a cross-sectional structural schematic diagram of the present invention; Figure 3 For the present invention Figure 1 A schematic diagram of a cross-sectional three-dimensional structure; Figure 4 It is a schematic diagram of the explosion structure of the present invention; Figure 5 For the present invention Figure 4 A schematic diagram of the cross-sectional structure of; Figure 6 It is a schematic diagram of the cross-sectional structure of the installation tube of the present invention; Figure 7 For the present invention Figure 6 Schematic diagram of the explosion structure; Figure 8 For the present invention Figure 3 A schematic diagram of the enlarged structure of area A; Fig. 9 It is a schematic diagram of the cross-sectional structure of the casing and pump casing of the present invention.

[0020] Among them, 1. support mechanism; 11. support cylinder seat; 12. boss; 13. mounting hole; 14. heat dissipation hole; 2. Motor; 21. Mounting tube; 22. Mounting groove; 23. Annular boss; 24. Fixing rod; 25. Sliding groove opening; 26. Threaded rod; 261. Square hole; 3. Magnetic block adjustment mechanism; 31. Mounting strip; 32. External magnetic steel; 33. Connecting rod; 34. Sliding block; 35. Bushing; 36. Connecting rod; 4. Control mechanism; 41. Control shaft; 42. Knob; 43. Docking square head; 44. Spring; 5. Internal magnetic steel; 6. Steel shaft; 7. Mounting housing; 71. Thrust plate; 8. Impeller body; 9. Pump casing; 10. Axial permanent magnetic bearing; 101. Radial permanent magnetic bearing. DETAILED DESCRIPTION

[0021] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] Embodiment 1: See also Figure 1-9A pump body with an integrated impeller structure of a penetrating magnetic coupler comprises a support mechanism 1 and a motor 2; the support mechanism 1 comprises a support cylinder seat 11; the bottom of the support cylinder seat 11 is fixed by bolts; the rear end of the support cylinder seat 11 is fixed to the motor 2 by bolts; heat dissipation holes 14 are evenly opened on both sides of the support cylinder seat 11; a mounting cylinder 21 is fixed to the output end of the motor 2; the mounting cylinder 21 is placed inside the support cylinder seat 11; the hollow end inside the mounting cylinder 21 is open; a magnetic block adjustment mechanism 3 is installed inside the mounting cylinder 21; the magnetic block adjustment mechanism 3 is used to adjust the distance between the inner and outer magnetic steels 32 distance; a boss 12 is provided on the surface of the support cylinder seat 11; a mounting hole 13 is opened on the surface of the boss 12; a control mechanism 4 is installed inside the mounting hole 13; the control mechanism 4 is used to control the magnetic block adjustment mechanism 3; a mounting shell 7 is installed at the front end of the interior of 1; a steel shaft 6 is provided at the center of the mounting shell 7; an inner magnetic steel 5 is installed on the surface of the steel shaft 6; the inner magnetic steel 5 is placed inside the mounting cylinder 21; an impeller body 8 is provided at the front end of the mounting shell 7; a pump casing 9 is sealed at the front end of the support cylinder seat 11 by bolts; the impeller body 8 is placed inside the pump casing 9; since the impeller body 8 is inside the pump casing 9 The pump body is driven by the magnetic coupling between the inner magnetic steel 5 and the outer magnetic steel 32. Therefore, when there are a lot of impurities in the fluid or when the pipeline is blocked, the distance between the inner magnetic steel 5 and the outer magnetic steel 32 can be appropriately increased or decreased by adjusting the magnetic block adjustment mechanism 3 through the control mechanism 4, so as to control the transmission torque and the running load; when the internal pressure of the pump housing 9 rises instantly, the coupling strength can be reduced by increasing the gap between the inner and outer magnetic steels, so that the impeller body 8 is protected from excessive torque impact; at the same time, the support cylinder seat 11, the steel shaft 6 and the mounting shell 7 keep the overall structure concentric and stable, and the thrust plate 71, The cooperation between the radial permanent magnetic bearing 101 and the axial permanent magnetic bearing 10 greatly reduces the friction loss of the rotating parts and extends the service life; the heat dissipation holes 14 on the support cylinder seat 11 help to quickly dissipate heat under high load conditions, and the control mechanism 4 efficiently adjusts the magnetic block adjustment mechanism 3 through the mounting hole 13, so that the mounting bar 31, connecting rod 33, slider 34, connecting rod 36, external magnetic steel 32 and sleeve 35 can accurately adjust the internal and external magnetic gaps without complicated disassembly, adapt to different fluid characteristics and achieve overload protection and flexible adaptability for the impeller body 8.

[0023] See also Figure 6-7The inner wall of the mounting cylinder 21 is evenly provided with mounting grooves 22; an annular boss 23 is provided at one end of the mounting cylinder 21 close to the motor 2; a fixing rod 24 is evenly provided on the surface of the annular boss 23 with the axis of the mounting cylinder 21 as the center; a slide groove opening 25 is evenly provided on the rear end surface of the mounting cylinder 21; multiple slide groove openings 25 correspond to the fixing rod 24 one by one; through the reasonable arrangement of the mounting groove 22, the annular boss 23, the fixing rod 24 and the slide groove opening 25, the magnetic block adjustment mechanism 3 can be accurately installed and adjusted inside the mounting cylinder 21, and the mounting strip 31 and the outer magnetic steel 32 can move accordingly to realize the magnetic force regulation of the inner magnetic steel 5; when there is high-viscosity liquid or impurities in the pipeline, the control mechanism 4 can be used to make the slider 34 move smoothly along the fixing rod 24, driving the connecting rod 36, the connecting rod 33 and the mounting strip 31 to achieve synchronous position changes, so as to flexibly respond to different fluid characteristics and quickly reduce the coupling strength when high pressure occurs.

[0024] See also Figure 6-8 , a threaded rod 26 is rotatably installed on the surface of one of the fixed rods 24; a square hole 261 is opened at the end of the threaded rod 26; the port of the square hole 261 is flush with the outer surface of the mounting tube 21; the rotation of the threaded rod 26 can drive the corresponding slider 34 to move accurately on the surface of the fixed rod 24, thereby driving the mounting bar 31 and the outer magnetic steel 32 to adjust their positions, so that the distance between the inner magnetic steel 5 and the outer magnetic steel 32 can be flexibly changed; when it is necessary to cause a sudden increase in the internal pressure of the pump casing 9 due to pipeline blockage or impurity accumulation, the operator can quickly engage the square hole 261 by controlling the rotating shaft 41 and the docking square head 43, thereby quickly changing the rotation state of the threaded rod 26, causing the outer magnetic steel 32 to retreat to reduce the magnetic coupling strength, thereby avoiding structural damage to the impeller body 8 and the steel shaft 6 under sudden overload.

[0025] See also Figure 6-9 The magnetic block adjustment mechanism 3 includes a mounting strip 31 evenly mounted inside the mounting groove 22 and a sleeve 35 rotating on the output shaft of the motor 2; an outer magnetic steel 32 is arranged on one side of the mounting strip 31 close to the axis of the mounting cylinder 21; the outer magnetic steel 32 corresponds to the inner magnetic steel 5; the rotation of the motor 2 can drive the sleeve 35 to operate, and when the sleeve 35 rotates, the connecting rod 36 can drive the mounting strip 31 to move synchronously, so that the outer magnetic steel 32 can achieve precise control of different distance positions relative to the inner magnetic steel 5; under normal working conditions, the outer magnetic steel 32 and the inner magnetic steel 5 maintain an appropriate gap to ensure efficient transmission of power, and when the fluid pressure increases abnormally, the outer magnetic steel 32 can be moved backward through simple adjustment to reduce the magnetic coupling force, thereby realizing timely protection of the impeller body 8.

[0026] See also Figure 6-8A connecting rod 33 is provided at the rear end of the mounting strip 31; the connecting rod 33 passes through the slide groove 25; a slider 34 is provided at the rear end of the connecting rod 33; multiple sliders 34 slide on the surface of the fixed rod 24; and one of the sliders 34 is screwed on the threaded rod 26; the cooperation of the connecting rod 33, the slider 34 and the mounting strip 31 makes the adjustment of the external magnetic steel 32 more flexible and efficient, and the position of the external magnetic steel 32 can be finely adjusted by changing the rotation angle of the threaded rod 26 without disassembling the front end assembly of the pump body; when facing high-pressure shock or pipeline blockage, this flexible mechanism can reduce the magnetic coupling strength in the shortest time, thereby protecting the impeller body 8 and the steel shaft 6 from excessive torque shock, ensuring stable operation and service life.

[0027] See also Figure 6-7 , the outer surface of the sleeve 35 is evenly hinged with connecting rods 36; the connecting rods 36 correspond to the mounting strips 31 one by one; the ends of the connecting rods 36 away from the sleeve 35 are respectively hinged on the sliders 34; when the sleeve 35 rotates, the uniform force transmission through the connecting rods 36 can simultaneously drive all the mounting strips 31 and the external magnetic steels 32 to change their positions synchronously, avoiding the occurrence of uneven magnetic coupling; the synchronous adjustment mechanism ensures that accurate and rapid magnetic response can be obtained under different fluid characteristics and variable load conditions, so that the impeller body 8 can run more smoothly and safely inside the pump casing 9.

[0028] See also Figure 7-8 , the mounting hole 13 corresponds to the axial position of the square hole 261; the control mechanism 4 includes a control shaft 41 sliding inside the mounting hole 13; a knob 42 is provided at the end of the control shaft 41; the knob 42 is placed outside the support cylinder seat 11; the axial displacement of the knob 42 can make the docking square head 43 selectively engage the square hole 261 to lock or unlock the threaded rod 26; when the pressure rises suddenly or the viscosity of the medium changes, the operator can quickly turn the knob 42 to achieve fine-tuning of the position of the external magnetic steel 32, thereby preventing the impeller body 8 from being subjected to excessive torque impact inside the pump casing 9, thereby improving the safety and adaptability of the entire pump body structure.

[0029] See also Figure 7-8, a docking square head 43 is provided at one end of the control shaft 41 away from the knob 42; the sizes of the docking square head 43 and the square hole 261 are adapted to each other; a spring 44 is sleeved on the surface of the docking square head 43; the spring 44 is placed inside the mounting hole 13; one end of the spring 44 contacts the end surface of the control shaft 41; when the magnetic adjustment operation is not performed, the spring 44 keeps the docking square head 43 away from the square hole 261, ensuring that the mounting cylinder 21 can rotate freely under normal conditions and the coupling between the outer magnetic steel 32 and the inner magnetic steel 5 is maintained in a preset state; when it is necessary to quickly reduce or increase the magnetic coupling strength to cope with changes in fluid pressure, the operator only needs to press the knob 42 to insert the docking square head 43 into the square hole 261, so that the threaded rod 26 can act immediately, thereby flexibly adjusting the positions of the slider 34, the connecting rod 33, the connecting rod 36, the mounting bar 31 and the outer magnetic steel 32.

[0030] See also Figure 2 and Fig. 9 A thrust plate 71 is provided at the front end of the mounting shell 7; the thrust plate 71 is placed on the front side of the inner magnetic steel 5; a radial permanent magnetic bearing 101 is installed inside the mounting shell 7; the radial permanent magnetic bearing 101 is placed corresponding to the rear end surface of the steel shaft 6; an axial permanent magnetic bearing 10 is also installed inside the mounting shell 7; the steel shaft 6 passes through the axial permanent magnetic bearing 10; the thrust plate 71, the radial permanent magnetic bearing 101 and the axial permanent magnetic bearing 10 form a complete support and limit system inside the mounting shell 7 to ensure that the steel shaft 6, the inner magnetic steel 5 and the impeller body 8 are always in a low friction and low wear state during high-speed operation; when the fluid contains impurities or the pipeline is blocked, causing the internal pressure to rise rapidly, these support and bearing structures can effectively delay component fatigue and maintain transmission stability, so that the control mechanism 4 and the magnetic block adjustment mechanism 3 can timely adjust the gap and magnetic coupling strength between the inner and outer magnetic steels 32 and the inner magnetic steel 5 when needed, thereby realizing efficient overload protection and adaptive adjustment of the pump body.

[0031] Embodiment 2: This embodiment is designed in detail and verified experimentally for the beneficial effect of protecting the impeller body by adjusting the distance between the inner and outer magnetic steels to reduce the magnetic coupling strength when there are a lot of impurities in the fluid or the pipeline is blocked. The pump body adopts a motor 2 of model XYZ-500, the mounting cylinder 21 is made of high-strength stainless steel, and the inner magnetic steel 5 and the outer magnetic steel 32 are both made of neodymium iron boron (NdFeB) magnetic steel, and the magnetic energy product reaches 35 MGOe. The magnetic block adjustment mechanism 3 drives the slider 34 through the threaded rod 26 (model AB-100) to achieve precise adjustment of the distance between the inner and outer magnetic steels 32 and the inner magnetic steel 5.

[0032] During the experiment, five groups of fluids with different impurity concentrations (0%, 5%, 10%, 15%, and 20%) were set for pumping tests. The control variable was that the gap between the inner and outer magnetic steels was initially set to 2 mm. As the impurity concentration increased, the adjustment mechanism 3 gradually increased the gap to 4 mm to observe the stress changes of the impeller body 8.

[0033] Experimental data table 1 shows that when the impurity concentration is 0%, the maximum torque of the impeller body 8 is 50 Nm; when the impurity concentration increases to 20% and the magnetic steel gap is adjusted to 4 mm, the maximum torque drops to 30 Nm. By formula:

[0034] Among them, T is torque, k is proportional constant, B is magnetic induction intensity, A is magnetic pole area, and r is effective radius, which proves that magnetic coupling intensity is proportional to torque. The increase of gap leads to the decrease of magnetic induction intensity B, thereby reducing torque T.

[0035]

[0036] The above experiments verified that the present invention effectively reduces overload torque by adjusting the magnetic steel gap, protects the impeller body, and ensures safe operation of the pump body in a high impurity environment.

[0037] Embodiment 3: This embodiment is aimed at the pump body facing different fluid characteristics (such as high viscosity media, liquid containing impurities), and the control mechanism 4 and the magnetic block adjustment mechanism 3 are used to flexibly adjust the gap between the inner and outer magnetic steels to improve the adaptability and overload protection capability of the pump body. The control shaft 41 of model LMN-300 is selected, and the knob 42 is made of high-strength polymer material to ensure stable operation under high-pressure environment.

[0038] The mounting housing 7 is made of aluminum alloy, with radial permanent magnetic bearing 101 (model DEF-200) and axial permanent magnetic bearing 10 (model GHI-150) built in. The steel shaft 6 is made of high-strength carbon steel with a tensile strength of 800 MPa. The mounting bar 31 is made of galvanized steel, and the connecting rod 33 and connecting rod 36 are made of corrosion-resistant aluminum alloy to ensure long-term stability in corrosive fluids.

[0039] Five groups of fluid delivery tests with different viscosities (100 cP, 500 cP, 1000 cP, 1500 cP, 2000 cP) were conducted. The control variable was that the magnetic steel gap was initially set to 2 mm. As the viscosity increased, the gap was gradually increased to 5 mm by adjusting the threaded rod 26 through the control shaft 41 to observe the operating efficiency of the pump body and the stress of the impeller body.

[0040] Experimental data table 2 shows that when the viscosity is 100 cP, the pump operating efficiency is 90%; when the viscosity is 2000 cP and the magnetic steel gap is adjusted to 5 mm, the pump operating efficiency drops to 70%, but the maximum force of the impeller body 8 drops from 60 Nm to 35 Nm.

[0041]

[0042] By formula:

[0043] Where η is the operating efficiency, is the output power, It is proved that appropriately increasing the magnetic steel gap in high viscosity fluid can reduce the system load to a certain extent and extend the life of the equipment.

[0044] This embodiment verifies the effectiveness of the present invention in adapting to different fluid characteristics and achieving overload protection by flexibly adjusting the magnetic steel gap, thereby improving the operating stability and reliability of the pump body under complex working conditions.

[0045] Embodiment 4: This embodiment aims at the pump body under high-speed operation and high-load conditions, and realizes low friction and high-stability support of the transmission system by reasonably arranging the support and bearing structure, thereby extending the service life of the equipment. The radial permanent magnetic bearing 101 of model JKL-400 and the axial permanent magnetic bearing 10 of model MNO-250 are selected, and the steel shaft 6 is made of heat-treated carbon steel with a hardness of HRC60 to ensure wear resistance under high stress conditions.

[0046] The mounting housing 7 is made of aluminum alloy, which has excellent heat dissipation performance, and a thrust plate 71 (made of high-strength rubber composite material) is arranged inside it to prevent excessive displacement of the internal magnetic steel 5 during high-speed rotation. The mounting bar 31 and the connecting rod 36 are both made of lightweight high-strength alloy material (such as titanium alloy) to reduce dynamic load and inertia effects.

[0047] Five groups of running tests were conducted at different speeds (1000 RPM, 1500 RPM, 2000 RPM, 2500 RPM, 3000 RPM) and different loads (50 Nm, 100 Nm, 150 Nm, 200 Nm, 250 Nm). The control variable was that the magnetic steel gap was initially set to 2 mm, and the magnetic coupling strength was kept within the design range by adjusting the control mechanism 4 to observe the bearing temperature rise and equipment wear.

[0048] Experimental data Table 3 shows that under extreme conditions of a rotation speed of 3000 RPM and a load of 250 Nm, the temperature rises of bearing 101 and bearing 10 are 75°C and 80°C respectively, and the equipment operates stably; under the same conditions, the temperature rise of the conventional pump body bearing that does not adopt the structure of the present invention exceeds 100°C, and obvious signs of wear are shown.

[0049]

[0050] By formula:

[0051] Wherein, F is the friction force, μ is the friction coefficient, N is the normal force, and the properly arranged radial permanent magnetic bearing 101 and axial permanent magnetic bearing 10 pass By optimizing the magnetic field distribution, the friction coefficient μ is reduced, thereby reducing the friction force F, effectively reducing the bearing temperature rise and wear rate.

[0052] This embodiment significantly improves the operating stability and durability of the pump body under high-speed and high-load conditions by optimizing the design of bearings and support structures, extends the service life of the equipment, and solves the problem of traditional pump bodies being easily damaged and difficult to repair under high-stress conditions.

[0053] Experimental control data table

[0054] Comparative test conditions and control variables The comparison test used the same fluid medium and the same pump body size. The conventional pump body was not equipped with a magnetic block adjustment mechanism and a control mechanism. The magnetic steel gap was fixed and the bearing used an ordinary rolling bearing. All experiments were conducted at the same ambient temperature. and pressure conditions, the only variable is whether the magnetic coupling adjustment and optimized bearing structure of the present invention is adopted.

[0055] Through the above-mentioned embodiments and comparative tests, it is fully proved that the present invention has remarkable advantages in adjusting the magnetic coupling strength, adapting to different fluid characteristics and extending the life of the equipment, and meets the technical requirements put forward in the background technology.

[0056] Working principle: A bottom plate is provided at the bottom of the support cylinder seat 11, and the bottom plate is fixed by bolts, and then the motor 2 and the pump casing 9 are fixed to the front and rear ends of the support cylinder seat 11 respectively by bolts. Starting the motor 2 can drive the mounting cylinder 21 to rotate, and the rotation of the mounting cylinder 21 can drive the internal magnetic steel 5 to rotate through the magnetic force, and then the mounting shell 7 is rotated as a whole, so as to drive the impeller body 8 to rotate inside the pump casing 9 to realize the liquid transportation. The steel shaft 6 and the internal magnetic steel 5 are both installed inside the mounting shell 7, which can be convenient for the overall installation or disassembly. The thrust plate 71 at the front end can limit the internal magnetic steel 5, and the axial permanent magnetic bearing 10 and radial permanent magnetic bearing 101 at the rear end can reduce the friction of the steel shaft 6 and improve the service life.

[0057] During use, due to the presence of the spring 44, the control shaft 41 has an outward force, at this time, the docking square head 43 will not contact the surface of the installation tube 21, and the rotation of the installation tube 21 will not be affected under non-human operation. At this time, the gap between the outer magnetic steel 32 and the installation shell 7 remains fixed. When adjustment is required, the rotation of the installation tube 21 can be controlled to make the square hole 261 correspond to the docking square head 43, and then the knob 42 is pressed down to make the docking square head 43 enter the inside of the square hole 261, and then the control mechanism 4 is rotated to drive the threaded rod 26 to rotate. When the threaded rod 26 rotates, its surface can be driven to rotate. The combined slider 34 moves to adjust the distance between it and the axis of the mounting tube 21. When a single slider 34 moves, the connecting rod 36 installed on its surface can drive the sleeve 35 to rotate, so that multiple connecting rods 36 drive the remaining multiple sliders 34 to move synchronously. The movement of the slider 34 can drive the connecting rod 33 to move, and then drive the mounting bar 31 to move, so as to synchronously adjust the distance between the multiple external magnetic steels 32. By controlling the distance of the gap between the external magnetic steel 32 and the mounting shell 7, the magnetic force between them can be controlled. When the distance between the two is reduced, the magnetic force between them increases, and vice versa.

[0058] For example, if there are too many impurities in the transported fluid or the pipeline is blocked, the internal pressure of the pump casing 9 will increase dramatically in a short period of time. At this time, if the internal and external magnets still maintain a strong magnetic force, the pipeline pressure may continue to increase and will affect the impeller body 8, causing the impeller body 8 to break. The present invention can control the distance between the internal and external magnets before transportation to provide overload protection when the pressure of the pump casing 9 increases. When the distance between the internal and external magnets increases, the magnetic force increases and the upper limit of the overload protection increases. On the contrary, when the distance decreases, the magnetic force weakens and the sensitivity during overload increases, thereby effectively adapting to the transportation of different fluids and effectively protecting the impeller body 8 and the pipeline.

[0059] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A pump body with an integrated impeller structure of a penetrating magnetic coupler, comprising a support mechanism (1) and a motor (2), characterized in that: The support mechanism (1) comprises a support cylinder seat (11), the bottom of the support cylinder seat (11) is fixed by bolts, the rear end of the support cylinder seat (11) is fixed to the motor (2) by bolts, both sides of the support cylinder seat (11) are evenly provided with heat dissipation holes (14), the output end of the motor (2) is fixed with a mounting cylinder (21), the mounting cylinder (21) is placed inside the support cylinder seat (11), the hollow end of the mounting cylinder (21) is open, and a magnetic block adjustment mechanism (3) is installed inside the mounting cylinder (21), and the magnetic block adjustment mechanism (3) is used to adjust the distance between the inner and outer magnetic steels; The surface of the support cylinder seat (11) is provided with a boss (12), the surface of the boss (12) is provided with a mounting hole (13), a control mechanism (4) is installed inside the mounting hole (13), and the control mechanism (4) is used to control the magnetic block adjustment mechanism (3); A mounting shell (7) is installed at the front end of the support mechanism (1), a steel shaft (6) is arranged at the center of the mounting shell (7), an inner magnetic steel (5) is installed on the surface of the steel shaft (6), the inner magnetic steel (5) is placed inside the mounting cylinder (21), an impeller body (8) is arranged at the front end of the mounting shell (7), a pump casing (9) is sealed with bolts at the front end of the support cylinder seat (11), and the impeller body (8) is placed inside the pump casing (9).

2. A pump body with an integrated impeller structure with a penetrating magnetic coupler according to claim 1, characterized in that: The inner wall of the mounting tube (21) is evenly provided with mounting grooves (22); an annular boss (23) is provided at one end of the mounting tube (21) close to the motor (2); fixing rods (24) are evenly provided on the surface of the annular boss (23) with the axis of the mounting tube (21) as the center; and slide groove openings (25) are evenly provided on the rear end surface of the mounting tube (21); a plurality of the slide groove openings (25) correspond to the fixing rods (24) one by one.

3. A pump body with an integrated impeller structure with a penetrating magnetic coupler according to claim 2, characterized in that: A threaded rod (26) is rotatably mounted on the surface of one of the fixing rods (24), a square hole (261) is formed at the end of the threaded rod (26), and an end of the square hole (261) is flush with the outer surface of the mounting tube (21).

4. A pump body with an integrated impeller structure with a penetrating magnetic coupler according to claim 3, characterized in that: The magnetic block adjustment mechanism (3) comprises a mounting bar (31) evenly mounted inside the mounting groove (22) and a shaft sleeve (35) rotating on the output shaft of the motor (2), and an outer magnetic steel (32) is arranged on one side of the mounting bar (31) close to the axis of the mounting cylinder (21), and the outer magnetic steel (32) corresponds to the inner magnetic steel (5).

5. A pump body with an integrated impeller structure with a penetrating magnetic coupler according to claim 4, characterized in that: A connecting rod (33) is provided at the rear end of the mounting bar (31), the connecting rod (33) passes through the sliding groove (25), and a sliding block (34) is provided at the rear end of the connecting rod (33). A plurality of the sliding blocks (34) slide on the surface of the fixing rod (24), and one of the sliding blocks (34) is screwed onto the threaded rod (26).

6. A pump body with an integrated impeller structure with a penetrating magnetic coupler according to claim 5, characterized in that: Connecting rods (36) are evenly hinged on the outer surface of the shaft sleeve (35), and the connecting rods (36) correspond to the mounting bars (31) one by one. One end of the connecting rod (36) away from the shaft sleeve (35) is hinged on the slider (34).

7. The pump body with an integrated impeller structure with a penetrating magnetic coupler according to claim 3, characterized in that: The mounting hole (13) corresponds to the axial position of the square hole (261); the control mechanism (4) comprises a control shaft (41) sliding inside the mounting hole (13); a knob (42) is provided at the end of the control shaft (41); and the knob (42) is placed outside the support cylinder seat (11).

8. The pump body with an integrated impeller structure of a penetrating magnetic coupler according to claim 7, characterized in that: An end of the control shaft (41) facing away from the knob (42) is provided with a docking square head (43), the size of the docking square head (43) and the square hole (261) being adapted to each other, a spring (44) is sleeved on the surface of the docking square head (43), the spring (44) is placed inside the mounting hole (13), and one end of the spring (44) is in contact with the end surface of the control shaft (41).

9. The pump body with an integrated impeller structure of a penetrating magnetic coupler according to claim 1, characterized in that: A thrust plate (71) is provided at the front end of the mounting shell (7), and the thrust plate (71) is placed at the front side of the inner magnetic steel (5). A radial permanent magnetic bearing (101) is installed inside the mounting shell (7), and the radial permanent magnetic bearing (101) is placed corresponding to the rear end surface of the steel shaft (6). An axial permanent magnetic bearing (10) is also installed inside the mounting shell (7), and the steel shaft (6) passes through the axial permanent magnetic bearing (10).

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