High-efficiency magnetic drive pump

Abstract

The high-efficiency magnetic drive pump comprises a pump body, a suction cover is fixedly connected to one side of the pump body, a cover plate is fixedly connected to the side, away from the suction cover, of the interior of the pump body, a bearing body is fixedly connected to the side, away from the suction cover, of the pump body, and a pump shaft is rotationally connected to the interior of the bearing body; an impeller is arranged in the pump body, and impeller back blades are arranged on the side, away from the suction cover, of the impeller. The invention relates to the technical field of magnetic drive pumps, and solves the problems that in the prior art, in order to ensure that a magnetic drive pump is completely free of leakage, an isolation sleeve is usually made of a metal material, eddy current loss generated in an alternating magnetic field releases energy in a heat form, the power of the magnetic drive pump is consumed, and in order to take away the eddy current loss and heat generated by operation of a sliding bearing, the sliding bearing is damaged. The sliding bearing is lubricated and cooled by a part of medium at a shunting position of an outlet of the magnetic drive pump and heat generated by eddy current loss is taken away, so that the volume loss is increased, and the working efficiency of the whole machine is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of magnetic pumps, in particular to a high-efficiency magnetic pump. Background Art

[0002] The leakage-free magnetic pump is a new type of pump that uses the principle of modern magnetic mechanics and the magnetic transmission of permanent magnets to achieve contactless transmission of torque. That is, when the motor drives the outer rotor (i.e., outer magnetic steel) assembly to rotate, the magnetic lines of force pass through the isolation sleeve through the action of the magnetic field to drive the inner rotor (i.e., inner magnetic steel) assembly and the impeller to rotate synchronously. Since the isolation sleeve completely seals the pump shaft, no shaft seal and no leakage are achieved. The magnetic pump has an increasingly wide application field due to its completely leakage-free characteristics. In addition to being used in the fields of aviation and aerospace, it is used in the chemical, metallurgical, light industry, food and other industries to pump highly corrosive, toxic, flammable and precious liquids. In the prior art, in order to ensure that the magnetic pump is completely leak-free, the isolation sleeve is usually made of metal. In the alternating magnetic field, the eddy current loss generated releases energy in the form of heat, consumes the power of the magnetic pump, and in order to take away the eddy current loss and the heat generated by the operation of the sliding bearing, a part of the medium at the outlet of the magnetic pump is usually used to lubricate and cool the sliding bearing and take away the heat generated by the eddy current loss, which increases the volume loss and reduces the working efficiency of the whole machine. Summary of the invention

[0003] In view of the deficiencies in the prior art, the present invention provides a high-efficiency magnetic pump, which solves the problem in the prior art that, in order to ensure that the magnetic pump is completely leak-free, the isolation sleeve is usually made of metal. In the alternating magnetic field, the eddy current loss generated releases energy in the form of heat, consumes the power of the magnetic pump, and in order to take away the eddy current loss and the heat generated by the operation of the sliding bearing, a part of the medium at the outlet of the magnetic pump is usually used to lubricate and cool the sliding bearing and take away the heat generated by the eddy current loss, thereby increasing the volumetric loss and reducing the working efficiency of the whole machine.

[0004] To achieve the above-mentioned purpose, the present invention is implemented through the following technical solutions: a high-efficiency magnetic pump, including a pump body, one side of the pump body is fixedly connected to a suction cover, the side of the pump body away from the suction cover is fixedly connected to a cover plate, the side of the pump body away from the suction cover is fixedly connected to a bearing body, the bearing body is rotatably connected to a pump shaft, an impeller is arranged inside the pump body, the side of the impeller away from the suction cover is provided with an impeller back blade, the impeller is movably connected to the suction cover and the cover plate respectively, the impeller is fixedly connected to the pump shaft through an impeller locking nut, and the end of the pump shaft away from the impeller is provided There is an inner magnetic steel, and the end of the inner magnetic steel away from the impeller is fixedly connected to an open auxiliary impeller. The inner magnetic steel and the open auxiliary impeller are both fixedly connected to the pump shaft through the inner magnetic steel locking nut. An isolation sleeve is provided on the outside of the inner magnetic steel, and the isolation sleeve is fixedly connected to the pump body. The pump body is located on the outside of the isolation sleeve and is fixedly connected to a connector, and the side of the connector away from the pump body is fixedly connected to a bearing box body, the inside of the bearing box body is rotatably connected to a drive shaft, and the end of the drive shaft close to the isolation sleeve is fixedly connected to a coupling, and an outer magnetic steel is provided on the outside of the isolation sleeve, and the outer magnetic steel is fixedly connected to the coupling.

[0005] Preferably, a front double-sided shutoff ring is provided on the side of the impeller close to the suction cover, and the front double-sided shutoff ring is gap-matched with the suction cover, and a rear double-sided shutoff ring is provided on the side of the impeller away from the suction cover, and the rear double-sided shutoff ring is gap-matched with the cover plate, and the front double-sided shutoff ring and the rear double-sided shutoff ring are equidistantly provided with return holes, and balancing holes are equidistantly provided inside the impeller.

[0006] Preferably, both ends of the outer wall of the pump shaft are sleeved with elastic sleeves, the outer wall of the elastic sleeve is cooperatively connected with a sliding bearing sleeve, the outer wall of the sliding bearing sleeve is slidably connected with a sliding shaft liner assembly, a thrust plate assembly is arranged outside the sliding shaft liner assembly, and the thrust plate assembly is fixedly connected to the bearing body.

[0007] Preferably, bearing covers are fixedly connected on both sides of the bearing housing, the bearing cover close to the connecting body is rotatably connected to the coupling, a magnetic seal is provided on the side of the bearing cover close to the connecting body away from the bearing housing, and the magnetic seal is cooperatively connected to the coupling, a cylindrical roller bearing is fixedly connected on the side of the bearing housing close to the connecting body, the inner wall of the cylindrical roller bearing is fixedly connected to the drive shaft, a bearing isolator is provided on the outer wall of the end of the drive shaft away from the coupling, and the bearing isolator is fixedly connected to the bearing cover.

[0008] Preferably, an oil window is provided on one side of the outer wall of the bearing housing, and a constant-position oil cup is provided on one side of the bearing housing located at the oil window.

[0009] Preferably, an oil-gas separator is provided on the top of the bearing housing.

[0010] Preferably, an exhaust hole is provided at the top of the pump body, and a residual discharge hole is provided at the bottom of the pump body.

[0011] Preferably, the bottoms of the pump body and the bearing housing are both provided with supporting feet.

[0012] The present invention provides a high-efficiency magnetic pump. It has the following beneficial effects: the high-efficiency magnetic pump, through the cooperation among the pump body, suction cover, cover plate, bearing body, pump shaft, impeller, impeller locking nut, internal magnetic steel, open auxiliary impeller, internal magnetic steel locking nut, isolation sleeve, connector and impeller back blade, adopts isolation sleeve made of high resistance material, which can reduce the heat generated by eddy current loss caused by alternating magnetic field and effectively reduce the power loss of the prime mover. A part of the medium is diverted from the main circulation and enters the rear cavity of the magnetic pump through the channel between the cover plate and the bearing body to form an auxiliary circulation medium. The auxiliary circulation medium first lubricates the sliding bearing assembly and then circulates to the isolation sleeve through the center hole of the pump shaft. The root of the sleeve is pressurized by the open auxiliary impeller, and then passes through the circulation hole, and is pressurized twice by the impeller back blades on the impeller, and circulates to the pump outlet to merge with the main circulation and discharge from the pump body. The auxiliary circulation medium can circulate along the magnetic circulation in the isolation sleeve and take away the heat generated by the magnetic eddy current loss. The auxiliary circulation medium is a high-pressure circulation, and is pressurized by the open auxiliary impeller and the impeller back blades before being merged into the main circulation. This can avoid the phenomenon of auxiliary circulation medium vaporization caused by temperature rise and reduce volume loss. Compared with the auxiliary circulation of conventional magnetic pumps, which diverts a part of the medium from the main circulation at the pump outlet for cooling and sliding, this can further improve the efficiency of the magnetic pump.

[0013] Through the coordination among the suction cover, cover plate, impeller, impeller back blades, front double-sided shutoff ring, rear double-sided shutoff ring, reflux hole and balance hole, by arranging impeller back blades on the back of the impeller, and opening balance holes equidistantly in the impeller, a double balancing mechanism is adopted to reduce the axial force generated by the impeller during high-speed rotation, thereby extending the service life of the equipment and improving the overall operating efficiency. By arranging double-sided shutoff rings at the front and back of the impeller, the conventional single-sided shutoff ring is innovated into a double-sided shutoff ring, and the resistance to medium leakage is increased by increasing the shutoff length, thereby reducing the volume loss caused by leakage at the shutoff ring, which helps to further improve the efficiency and stability of the magnetic pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the present invention;

[0015] Figure 2 It is a schematic diagram of the flow direction of the main circulating medium in the present invention;

[0016] Figure 3 It is a schematic diagram of the flow direction of the auxiliary circulating medium in the present invention;

[0017] Figure 4 It is a schematic diagram of the structure of the impeller, the impeller back blades and the front double-sided intercepting ring in the present invention;

[0018] Figure 5 It is a structural side view of the pump body, the exhaust hole and the residual discharge hole in the present invention;

[0019] Figure 6 for Figure 1 A partial enlarged view of the middle A area;

[0020] Figure 7 for Figure 1 A partial enlarged view of the middle B area;

[0021] Figure 8 It is a schematic diagram of the structure of the suction cover, the reflux hole and the front double-sided interception ring in the present invention;

[0022] Fig. 9 for Figure 1 A partial enlarged view of the middle C area.

[0023] In the figure: 1, pump body, 2, suction cover, 3, cover plate, 4, bearing body, 5, pump shaft, 6, impeller, 7, impeller locking nut, 8, internal magnetic steel, 9, open auxiliary impeller, 10, internal magnetic steel locking nut, 11, isolation sleeve, 12, connector, 13, bearing housing, 14, drive shaft, 15, coupling, 16, external magnetic steel, 17, impeller back blade, 18, front double-sided intercepting ring, 19, rear double-sided intercepting ring, 20, reflux hole, 21, balance hole, 22, sliding bearing sleeve, 23, elastic sleeve, 24, sliding bushing assembly, 25, thrust plate assembly, 26, cylindrical roller bearing, 27, bearing pressure cover, 28, magnetic seal, 29, bearing isolator, 30, oil window, 31, constant position oil cup, 32, oil-gas separator, 33, exhaust hole, 34, residual discharge hole, 35, support foot. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments 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.

[0025] In the prior art, in order to ensure that the magnetic pump is completely leak-free, the isolation sleeve is usually made of metal. In the alternating magnetic field, the eddy current loss generated releases energy in the form of heat, consuming the power of the magnetic pump. In order to take away the eddy current loss and the heat generated by the operation of the sliding bearing, a part of the medium at the outlet of the magnetic pump is usually used to lubricate and cool the sliding bearing and take away the heat generated by the eddy current loss, thereby increasing the volume loss and reducing the working efficiency of the whole machine.

[0026] In view of this, the present invention provides a high-efficiency magnetic pump, which is equipped with a pump body, a suction cover, a cover plate, a bearing body, a pump shaft, an impeller, an impeller locking nut, an internal magnetic steel, an open auxiliary impeller, an internal magnetic steel locking nut, a spacer sleeve, a connector and an impeller back blade, and adopts a spacer sleeve made of high resistance material to reduce the heat generated by eddy current loss caused by the alternating magnetic field, thereby reducing the power loss of the prime mover. A part of the medium is diverted from the main circulation, passes through the channel between the cover plate and the bearing body, enters the rear cavity of the magnetic pump to form an auxiliary circulation medium, and the auxiliary circulation medium first lubricates the sliding bearing assembly, and then circulates through the center hole of the pump shaft. The auxiliary circulation medium is pressurized by the open auxiliary impeller, and then passes through the circulation hole and the impeller back blades for secondary pressurization. It circulates to the pump outlet and merges with the main circulation and is discharged from the pump body, so that the auxiliary circulation medium circulates along the magnetic field in the isolation sleeve and takes away the heat generated by the magnetic eddy current loss. The auxiliary circulation medium is a high-pressure circulation, which is pressurized by the open auxiliary impeller and the impeller back blades and then merges into the main circulation, avoiding the phenomenon of auxiliary circulation medium vaporization caused by temperature rise and reducing volume loss. Compared with the auxiliary circulation of conventional magnetic pumps, in which a part of the medium is diverted from the main circulation at the pump outlet for cooling and sliding, the efficiency of the magnetic pump is further improved.

[0027] Through the personnel in this field, all the electrical components in this case are connected to their corresponding power supplies through wires, and appropriate controllers and encoders should be selected according to actual conditions to meet the control requirements. The specific connection and control sequence should refer to the following working principle, and the electrical connection between the electrical components is completed in the order of working in sequence. The detailed connection means are well-known technologies in this field. The following mainly introduces the working principles and processes, and no longer explains the electrical control.

[0028] Depend on Figure 1-9It can be seen that a high-efficiency magnetic pump includes a pump body 1, a suction cover 2 is fixedly connected to one side of the pump body 1, a cover plate 3 is fixedly connected to the side of the pump body 1 away from the suction cover 2, a bearing body 4 is fixedly connected to the side of the pump body 1 away from the suction cover 2, a pump shaft 5 is rotatably connected to the inside of the bearing body 4, an impeller 6 is arranged inside the pump body 1, an impeller back blade 17 is arranged on the side of the impeller 6 away from the suction cover 2, the impeller 6 is movably connected to the suction cover 2 and the cover plate 3, the impeller 6 is fixedly connected to the pump shaft 5 through an impeller locking nut 7, an inner magnetic steel 8 is arranged at one end of the pump shaft 5 away from the impeller 6, and the end of the inner magnetic steel 8 away from the impeller 6 An open auxiliary impeller 9 is fixedly connected, and both the internal magnetic steel 8 and the open auxiliary impeller 9 are fixedly connected to the pump shaft 5 through an internal magnetic steel locking nut 10. An isolation sleeve 11 is arranged on the outside of the internal magnetic steel 8, and the isolation sleeve 11 is fixedly connected to the pump body 1. The pump body 1 is located on the outside of the isolation sleeve 11 and is fixedly connected to a connector 12. The side of the connector 12 away from the pump body 1 is fixedly connected to a bearing housing 13. The inside of the bearing housing 13 is rotatably connected to a drive shaft 14. The end of the drive shaft 14 close to the isolation sleeve 11 is fixedly connected to a coupling 15. An external magnetic steel 16 is arranged on the outside of the isolation sleeve 11, and the external magnetic steel 16 is fixedly connected to the coupling 15.

[0029] In the specific implementation process, it is worth pointing out that the outer shell structure of the magnetic pump is formed by the cooperation between the pump body 1, the suction cover 2, the connecting body 12 and the bearing housing 13. The cooperation between the pump body 1, the suction cover 2, the cover plate 3, the bearing body 4, the pump shaft 5, the impeller 6 and the impeller locking nut 7, and the rotation of the impeller 6 allow the high-temperature medium to enter the interior of the pump body 1 from the suction cover 2, and be output from the outlet of the pump body 1 after being pressurized by the impeller 6, so as to realize the transportation of the high-temperature medium. The cover plate 3, the bearing body 4, the pump shaft 5, the inner magnetic steel 8, the inner magnetic steel locking nut 10, the isolation sleeve 11, the connecting body 12, the bearing housing 13, the drive shaft 1 4. The cooperation between the coupling 15 and the outer magnetic steel 16, through the rotation of the drive shaft 14 and the outer magnetic steel 16, under the non-contact magnetic coupling, enables the pump shaft 5 and the inner magnetic steel 8 to rotate at high speed without mechanical contact, thereby reducing friction loss and wear, and extending the service life of the equipment. By setting an isolation sleeve 11 between the inner magnetic steel 8 and the outer magnetic steel 16, a magnetically driven leakage-free sealing structure is achieved to completely isolate the medium from the external environment, thereby solving the problem of medium leakage. The isolation sleeve 11 is made of a high-resistance material to avoid the eddy current loss generated by the metal isolation sleeve 11 to release energy in the form of heat and consume the power of the prime mover. Through the cooperation among the pump body 1, the suction cover 2, the cover plate 3, the bearing body 4, the pump shaft 5, the impeller 6, the impeller locking nut 7, the internal magnetic steel 8, the open auxiliary impeller 9, the internal magnetic steel locking nut 10, the isolation sleeve 11, the connector 12 and the impeller back blade 17, the isolation sleeve 11 made of high resistance material is used to reduce the heat generated by the eddy current loss caused by the alternating magnetic field and reduce the power loss of the prime mover. A part of the medium is diverted from the main circulation and enters the rear cavity of the magnetic pump through the channel between the cover plate 3 and the bearing body 4 to form an auxiliary circulation medium. The auxiliary circulation medium first lubricates the sliding bearing assembly and then circulates to the isolation sleeve through the center hole of the pump shaft 5. The root of 11 is pressurized by the open auxiliary impeller 9, and then passes through the circulation hole, and is pressurized by the impeller back blades 17 on the impeller 6 for the second time, and circulates to the pump outlet to merge with the main circulation and discharge from the pump body 1, so that the auxiliary circulation medium circulates along the magnetic inside of the isolation sleeve 11 and takes away the heat generated by the magnetic eddy current loss. The auxiliary circulation medium is a high-pressure circulation, and is pressurized by the open auxiliary impeller 9 and the impeller back blades 17 before being merged into the main circulation, avoiding the phenomenon of auxiliary circulation medium vaporization caused by temperature rise and reducing volume loss. Compared with the auxiliary circulation of the conventional magnetic pump, which diverts a part of the medium from the main circulation at the pump outlet for cooling and sliding, the efficiency of the magnetic pump is further improved;

[0030] Further, a front double-sided intercepting ring 18 is provided on the side of the impeller 6 close to the suction cover 2, and the front double-sided intercepting ring 18 is gap-matched with the suction cover 2. A rear double-sided intercepting ring 19 is provided on the side of the impeller 6 away from the suction cover 2, and the rear double-sided intercepting ring 19 is gap-matched with the cover plate 3. The front double-sided intercepting ring 18 and the rear double-sided intercepting ring 19 are equidistantly provided with return holes 20, and the interior of the impeller 6 is equidistantly provided with balancing holes 21;

[0031] In the specific implementation process, it is worth pointing out that, through the cooperation among the suction cover 2, the cover plate 3, the impeller 6, the impeller back blade 17, the front double-sided interception ring 18, the rear double-sided interception ring 19, the return hole 20 and the balance hole 21, by arranging the impeller back blade 17 on the back of the impeller 6, and opening the balance hole 21 equidistantly in the impeller 6, a double balancing mechanism is adopted to reduce the axial force generated by the impeller 6 during high-speed rotation, extend the service life of the equipment, and improve the overall operating efficiency, and by arranging double-sided interception rings at the front and back of the impeller 6, the conventional single-sided interception ring is innovated into a double-sided interception ring, and the resistance to medium leakage is increased by increasing the interception length, thereby reducing the volume loss caused by leakage at the interception ring, and further improving the efficiency and stability of the magnetic pump;

[0032] Furthermore, both ends of the outer wall of the pump shaft 5 are sleeved with elastic sleeves 23, the outer wall of the elastic sleeve 23 is matched with a sliding bearing sleeve 22, the outer wall of the sliding bearing sleeve 22 is slidably connected with a sliding bushing assembly 24, and a thrust plate assembly 25 is arranged outside the sliding bushing assembly 24, and the thrust plate assembly 25 is fixedly connected to the bearing body 4;

[0033] In the specific implementation process, it is worth pointing out that the pump shaft 5 can stably rotate in the bearing body 4 through the cooperation between the bearing body 4, the pump shaft 5, the sliding bearing sleeve 22, the elastic sleeve 23, the sliding bushing assembly 24 and the thrust plate assembly 25. The elastic sleeve 23, as a key component connecting the sliding bearing sleeve 22 and the pump shaft 5, has the functions of buffering and shock absorption. When the pump shaft 5 is subjected to slight impact or vibration, it absorbs energy through its elastic deformation to protect the pump shaft 5 from direct damage. The sliding bushing assembly 24 ensures the coaxiality and accuracy of the pump shaft 5 during rotation and reduces the noise and vibration caused by eccentricity or shaking. The thrust plate assembly 25 is used to bear the thrust of the pump shaft in the axial direction to ensure that the pump shaft 5 will not be offset or damaged due to the axial force during rotation, thereby ensuring the stability and reliability of the pump shaft 5 and extending the service life of each component.

[0034] Further, bearing glands 27 are fixedly connected to both sides of the bearing housing 13, the bearing gland 27 close to the connecting body 12 is rotatably connected to the coupling 15, a magnetic seal 28 is provided on the side of the bearing gland 27 close to the connecting body 12 away from the bearing housing 13, the magnetic seal 28 is cooperatively connected to the coupling 15, a cylindrical roller bearing 26 is fixedly connected to the side of the bearing housing 13 close to the connecting body 12, the inner wall of the cylindrical roller bearing 26 is fixedly connected to the drive shaft 14, a bearing isolator 29 is provided on the outer wall of one end of the drive shaft 14 away from the coupling 15, and the bearing isolator 29 is fixedly connected to the bearing gland 27;

[0035] In the specific implementation process, it is worth pointing out that the stable rotation and efficient sealing of the drive shaft 14 in the bearing housing 13 are achieved through the cooperation between the bearing housing 13, the drive shaft 14, the coupling 15, the cylindrical roller bearing 26, the bearing gland 27, the magnetic seal 28 and the bearing isolator 29, so as to maintain a stable operating environment, and the magnetic seal 28 is used to seal the connection body 12 and the bearing housing 13, so as to improve the sealing effect, reduce friction loss and wear, and ensure the stability of power transmission;

[0036] Furthermore, an oil window 30 is provided on one side of the outer wall of the bearing housing 13, and a constant position oil cup 31 is provided on one side of the bearing housing 13 located at the oil window 30;

[0037] In the specific implementation process, it is worth pointing out that the oil window 30 is used to enable the operator to monitor the lubricating oil level in the bearing housing at any time to ensure the normal operation of the lubrication system and avoid poor lubrication or bearing damage caused by too low oil level. The constant level oil cup 31 is used to ensure that the amount of lubricating oil in the bearing housing 13 is maintained at a constant level to ensure the normal operation of the drive shaft 14 and extend its service life.

[0038] Furthermore, an oil-gas separator 32 is provided on the top of the bearing housing 13;

[0039] In the specific implementation process, it is worth pointing out that the oil-gas separator 32 is used to separate the lubricating oil in the bearing housing 13 from oil and gas, so as to prevent the gas from affecting the working characteristics of the bearing, reduce cavitation, and ensure the normal operation of the drive shaft 14;

[0040] Furthermore, the top of the pump body 1 is provided with an exhaust hole 33, and the bottom of the pump body 1 is provided with a residual discharge hole 34;

[0041] In the specific implementation process, it is worth pointing out that the exhaust hole 33 is used to exhaust the air in the pump body of the magnetic pump to prevent air lock and ensure the normal operation of the magnetic pump. The residual discharge hole 34 is used to drain the residual liquid in the pump during shutdown or maintenance, reducing the difficulty of cleaning and maintenance and improving maintenance efficiency.

[0042] Furthermore, the bottoms of the pump body 1 and the bearing housing 13 are both provided with supporting feet 35;

[0043] In the specific implementation process, it is worth pointing out that the support legs 35 are used to support and fix the magnetic pump.

[0044] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions. The sentence "includes an element defined by ... does not exclude the existence of other identical elements in the process, method, article or device including the element".

[0045] In the present invention, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the present invention according to the specific circumstances.

[0046] 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 high-efficiency magnetic pump, comprising a pump body (1), characterized in that: A suction cover (2) is fixedly connected to one side of the pump body (1); a cover plate (3) is fixedly connected to the side of the pump body (1) away from the suction cover (2); a bearing body (4) is fixedly connected to the side of the pump body (1) away from the suction cover (2); a pump shaft (5) is rotatably connected to the inside of the bearing body (4); an impeller (6) is arranged inside the pump body (1); an impeller back blade (17) is arranged on the side of the impeller (6) away from the suction cover (2); the impeller (6) is movably connected to the suction cover (2) and the cover plate (3), respectively; the impeller (6) is fixedly connected to the pump shaft (5) via an impeller locking nut (7); an inner magnetic steel (8) is arranged on one end of the pump shaft (5) away from the impeller (6); an open magnetic steel (17) is fixedly connected to the inner magnetic steel (8) on the other end of the impeller (6) The invention relates to an open auxiliary impeller (9), wherein the inner magnetic steel (8) and the open auxiliary impeller (9) are both fixedly connected to the pump shaft (5) through an inner magnetic steel locking nut (10); an isolation sleeve (11) is arranged on the outer side of the inner magnetic steel (8); the isolation sleeve (11) is fixedly connected to the pump body (1); a connecting body (12) is fixedly connected to the outer side of the isolation sleeve (11); a bearing housing (13) is fixedly connected to the side of the connecting body (12) away from the pump body (1); a driving shaft (14) is rotatably connected to the inside of the bearing housing (13); a coupling (15) is fixedly connected to the end of the driving shaft (14) close to the isolation sleeve (11); an outer magnetic steel (16) is arranged on the outer side of the isolation sleeve (11); the outer magnetic steel (16) is fixedly connected to the coupling (15).

2. A high-efficiency magnetic pump according to claim 1, characterized in that: A front double-sided intercepting ring (18) is provided on the side of the impeller (6) close to the suction cover (2), and the front double-sided intercepting ring (18) is clearance-matched with the suction cover (2). A rear double-sided intercepting ring (19) is provided on the side of the impeller (6) away from the suction cover (2), and the rear double-sided intercepting ring (19) is clearance-matched with the cover plate (3). The front double-sided intercepting ring (18) and the rear double-sided intercepting ring (19) are both equidistantly provided with return holes (20), and the interior of the impeller (6) is equidistantly provided with balancing holes (21).

3. A high-efficiency magnetic pump according to claim 1, characterized in that: Both ends of the outer wall of the pump shaft (5) are sleeved with elastic sleeves (23), the outer wall of the elastic sleeve (23) is cooperatively connected with a sliding bearing sleeve (22), the outer wall of the sliding bearing sleeve (22) is slidably connected with a sliding shaft liner assembly (24), a thrust plate assembly (25) is arranged outside the sliding shaft liner assembly (24), and the thrust plate assembly (25) is fixedly connected to the bearing body (4).

4. A high-efficiency magnetic pump according to claim 1, characterized in that: Both sides of the bearing housing (13) are fixedly connected with bearing covers (27); the bearing cover (27) close to the connecting body (12) is rotatably connected to the coupling (15); a magnetic seal (28) is provided on the side of the bearing cover (27) close to the connecting body (12) away from the bearing housing (13); the magnetic seal (28) is cooperatively connected to the coupling (15); a cylindrical roller bearing (26) is fixedly connected to the side of the bearing housing (13) close to the connecting body (12); the inner wall of the cylindrical roller bearing (26) is fixedly connected to the drive shaft (14); a bearing isolator (29) is provided on the outer wall of one end of the drive shaft (14) away from the coupling (15); the bearing isolator (29) is fixedly connected to the bearing cover (27).

5. A high-efficiency magnetic pump according to claim 1, characterized in that: An oil window (30) is provided on one side of the outer wall of the bearing housing (13), and a constant-position oil cup (31) is provided on one side of the bearing housing (13) located on the oil window (30).

6. A high-efficiency magnetic pump according to claim 1, characterized in that: An oil-gas separator (32) is arranged on the top of the bearing housing (13).

7. A high-efficiency magnetic pump according to claim 1, characterized in that: The top of the pump body (1) is provided with an exhaust hole (33), and the bottom of the pump body (1) is provided with a residual discharge hole (34).

8. A high-efficiency magnetic pump according to claim 1, characterized in that: The bottoms of the pump body (1) and the bearing housing (13) are both provided with supporting feet (35).

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