Scraper type permanent magnet synchronous electromagnetic pump

Abstract

This invention discloses a scraper-type permanent magnet synchronous electromagnetic pump. The pump body has a pump chamber with an opening at one end. An end cover is sealed and fixed to the opening end of the pump chamber. A cam rotor is installed in the pump chamber. The rotating shafts at the front and rear ends of the cam rotor are rotatably connected to the end cover and the pump body, respectively. One end of the upper scraper and the lower scraper are fixed to the inner wall of the pump chamber by upper and lower torsion springs, respectively, dividing the pump chamber into a low-pressure chamber on the left and a high-pressure chamber on the right. The upper and lower torsion springs apply a spring force pointing towards the axis of the cam rotor to the upper and lower scrapers, respectively. The volume of the low-pressure chamber is larger than that of the high-pressure chamber. A winding is embedded in the inner wall at the bottom of the pump chamber or the inner surface of the end cover. Correspondingly, a pair of permanent magnets is embedded in the end face of the cam rotor near the winding. When the cam rotor rotates, the upper and lower scrapers swing, and their free ends always press against the outer circumferential surface of the cam rotor, scraping the fluid on the surface of the cam rotor. The cam-blade rotor, in cooperation with the upper and lower scrapers, improves the overall stability.

Description

Technical Field

[0001] This invention relates to the field of electromagnetic pump technology, and specifically to a scraper-type permanent magnet synchronous electromagnetic pump. Background Technology

[0002] Traditional single-acting or double-acting vane pumps, because the vanes reciprocate within their mounting slots, require sufficient length for guidance, resulting in a loose structure. Furthermore, as pressure increases, friction between the vanes and the slot wall increases, hindering reciprocating movement and increasing internal leakage. To improve the stability of vane pumps, utility model patent application number 202010933822.0 discloses an internal rotor oscillating scraper pump. This pump uses oscillating scrapers instead of the reciprocating vanes of traditional vane pumps, achieving high-pressure output through pressure self-sealing. The internal rotor profile parameters improve volumetric utilization, forming a valveless distribution system with high pressure, compact structure, and high-speed, high-efficiency operation. However, it requires a motor to drive the rotor, reducing overall stability and sealing. Additionally, the seal between the scraper and the rotor needs improvement. Summary of the Invention

[0003] To overcome the shortcomings of existing technologies, this invention provides a scraper-type permanent magnet synchronous electromagnetic pump, which solves the problem that the overall stability and sealing performance of existing vane-type scraper pumps need to be improved.

[0004] To achieve the above objectives, the present invention relates to a scraper-type permanent magnet synchronous electromagnetic pump, the main structure of which includes a cam rotor, scrapers, a pump body, a pair of permanent magnets, torsion springs, end covers, windings, an oil outlet, and an oil inlet. The scrapers are divided into upper and lower scrapers, the permanent magnet pair includes N-pole permanent magnets and S-pole permanent magnets, and the torsion springs are divided into upper and lower torsion springs. A pump chamber is formed within the pump body, with one end open. An end cover is sealed and fixed to the open end of the pump chamber. A front shaft fixing groove is formed at the bottom of the pump chamber, and a rear shaft fixing groove is formed on the inner surface of the end cover. The cam rotor is installed within the pump chamber with a certain movement clearance between it and the pump chamber. The front and rear shafts of the cam rotor are respectively placed in the front and rear shaft fixing grooves and are rotatably connected. The upper and lower scrapers are respectively placed on the upper and lower sides of the cam rotor. Inside the pump chamber on the side, one end of the upper scraper and the lower scraper are fixed to the inner wall of the pump chamber by the upper and lower torsion springs, respectively. The upper and lower torsion springs apply a spring force pointing towards the axis of the cam rotor to the upper and lower scrapers, respectively. Together with the rotor shaft, they divide the pump chamber into a low-pressure chamber on the left and a high-pressure chamber on the right. The low-pressure chamber and the high-pressure chamber are connected to the oil inlet and the oil outlet, respectively. The volume of the low-pressure chamber is larger than that of the high-pressure chamber. A winding is embedded in the inner wall at the bottom of the pump chamber or the inner surface of the end cover. Correspondingly, a pair of permanent magnets is embedded in the end face of the cam rotor near the winding. The winding and the pair of permanent magnets correspond one-to-one. The winding is exactly placed on the outer periphery of the corresponding pair of permanent magnets. When the cam rotor rotates, the upper scraper and the lower scraper swing and their free ends are always pressed against the outer periphery of the cam rotor, scraping the fluid on the surface of the cam rotor.

[0005] The pump chamber includes a cylindrical rotor chamber, an upper scraper mounting groove, a lower scraper mounting groove, a high-pressure fluid pipe, and a low-pressure fluid pipe. The rotor chamber is formed in the pump body. The upper and lower scraper mounting grooves are respectively formed on the inner walls of the pump chamber on the upper and lower sides of the rotor chamber. The depth of the upper and lower scraper mounting grooves is greater than the depth of the rotor chamber. High-pressure and low-pressure fluid pipes are respectively formed on the left and right circumferences of the pump body around the rotor chamber. The rotor chamber and the high-pressure fluid pipe are connected at the upper scraper mounting groove. The upper part of the low-pressure fluid pipe is connected to the rotor chamber, and the lower part of the low-pressure fluid pipe is attached to the lower scraper mounting groove. The pump body is connected to the rotor cavity. An oil inlet and an oil outlet are respectively opened on the side wall of the pump body. The oil inlet and the oil outlet are connected to the low-pressure fluid pipeline and the high-pressure fluid pipeline, respectively. The upper scraper and the lower scraper are respectively placed in the upper scraper mounting groove and the lower scraper mounting groove with a small clearance fit. The ends of the upper scraper and the lower scraper away from the end cover are fixed in the upper scraper mounting groove and the lower scraper mounting groove by the upper torsion spring and the lower torsion spring, respectively. The cam rotor has a blade structure and is placed in the rotor cavity with a small clearance fit between the cam rotor and the rotor cavity. The ends of the upper scraper and the lower scraper press against the outer circumferential surface of the cam rotor.

[0006] The front axle bearing and the rear axle bearing are respectively placed in the front axle fixing groove and the rear axle fixing groove. The rotating shafts at both ends of the cam rotor are rotatably connected to the rotating shaft fixing grooves on both sides through the front axle bearing and the rear axle bearing, respectively.

[0007] The upper and lower scrapers have the same structure, both including a cylindrical insert and a scraper. One side of the scraper is fixed to the insert, and the arc surface of the other side of the scraper is pressed against the outer circumferential surface of the cam rotor. The insert is installed in the upper or lower scraper mounting groove. An annular groove is opened on the outside of the end of the insert away from the end cover. An upper or lower torsion spring is sleeved in the annular groove. One end of the upper or lower torsion spring is fixed to the insert, and the other end is fixed to the inner wall of the upper or lower scraper mounting groove.

[0008] Several annular grooves are made on the inner wall at the bottom of the rotor cavity or on the inner surface of the end cover. The wires are wound in the annular grooves to form windings. Several slots are made on the surface of the cam rotor away from the end cover. The annular grooves correspond one-to-one with the slots, and the annular grooves are placed on the outer periphery of the corresponding slots. The N-pole permanent magnets and S-pole permanent magnets are embedded in the slots. The N-pole permanent magnets and S-pole permanent magnets in the annularly arranged slots are arranged in the order of N, S, N, S...

[0009] The sealing ring is fixed at the connection between the end cover and the open end of the pump chamber, and the end cover is fixed to the open end of the pump body by nuts and bolts.

[0010] The outer circumferential shape of the cam rotor is a cam profile, which can be a smooth ellipse, semi-ellipse, circle, cycloid, or a combination of profiles.

[0011] The cam rotor is a five-bladed rotor evenly distributed along the circumference, with the blade peaks being arcs and the blade valleys being cycloids.

[0012] Compared with the prior art, the present invention has the following beneficial effects: (1) The rotor of the existing scraper pump is replaced with a cam blade rotor. The cam blade rotor cooperates with the upper and lower scrapers, which improves the overall stability; (2) Permanent magnets are embedded in the five-blade scraper, and wires are wound on one side of the pump body as stator windings. The ring magnetic field formed by the asynchronous alternating current in the stator windings drives the permanent magnets on the five-blade scraper to rotate, thereby realizing the rotation of the scraper. The swing scraper replaces the reciprocating blades, and at the same time realizes pressure self-sealing, forming a new type of fluid pump with no distribution valve, high pressure, compact structure, high speed and high efficiency. Attached Figure Description

[0013] Figure 1 This is a front view of the scraper-type permanent magnet synchronous electromagnetic pump involved in Example 1.

[0014] Figure 2 This is a front cross-sectional view of the scraper-type permanent magnet synchronous electromagnetic pump involved in Example 1.

[0015] Figure 3 This is a right view of the scraper-type permanent magnet synchronous electromagnetic pump (excluding the end cover) involved in Example 1.

[0016] Figure 4 This is a side view of the pump body involved in Example 1.

[0017] Figure 5 This is a diagram showing the connection state between the scraper and the torsion spring in Example 1.

[0018] Wherein: 1 is the cam rotor, 2 is the scraper, 3 is the pump body, 4 is the permanent magnet pair, 5 is the torsion spring, 6 is the end cover, 7 is the winding, 8 is the oil outlet, 9 is the oil inlet, 10 is the oil passage, 11 is the front bearing, 12 is the rear bearing, 13 is the sealing ring, 14 is the nut, and 15 is the bolt. Detailed Implementation

[0019] To more clearly illustrate the content of this invention, the invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0020] Example 1

[0021] like Figure 1-4 As shown, the scraper-type permanent magnet synchronous electromagnetic pump involved in this embodiment has a main structure including a cam rotor 1, a scraper 2, a pump body 3, a pair of permanent magnets 4, a torsion spring 5, an end cover 6, a winding 7, an oil outlet 8, and an oil inlet 9. The scraper 2 is divided into an upper scraper 2A and a lower scraper 2B. The permanent magnet pair 4 includes an N-pole permanent magnet 401 and an S-pole permanent magnet 402. The torsion spring 5 is divided into an upper torsion spring 5A and a lower torsion spring 5B.

[0022] A pump chamber is formed inside the pump body 3, with an opening at one end. An end cover 6 is sealed and fixed to the opening end of the pump chamber. A front shaft fixing groove is formed at the bottom of the pump chamber, and a rear shaft fixing groove is formed on the inner surface of the end cover 6. The cam rotor 1 is installed in the pump chamber with a certain movement clearance between it and the pump chamber. The rotating shafts at the front and rear ends of the cam rotor 1 are respectively placed in the front shaft fixing groove and the rear shaft fixing groove and are rotatably connected. The upper scraper 2A and the lower scraper 2B are respectively placed in the pump chamber on the upper and lower sides of the cam rotor 1. One end of the upper scraper 2A and the lower scraper 2B is fixed to the inner wall of the pump chamber by the upper torsion spring 5A and the lower torsion spring 5B, respectively. The upper torsion spring 5A and the lower torsion spring 5B apply a force to the upper scraper 2A and the lower scraper 2B pointing towards the axis of the cam rotor 1. The elastic force, together with the rotor shaft, divides the pump chamber into a low-pressure chamber on the left and a high-pressure chamber on the right. The low-pressure chamber and the high-pressure chamber are connected to the oil inlet 9 and the oil outlet 8, respectively. The volume of the low-pressure chamber is larger than that of the high-pressure chamber. A winding 7 is embedded in the inner wall at the bottom of the pump chamber. Correspondingly, a pair of permanent magnets 4 are embedded in the end face of the cam rotor 1 near the winding 7. The winding 7 and the pair of permanent magnets 4 correspond one-to-one. The winding 7 is exactly placed on the outer periphery of the corresponding pair of permanent magnets 4. When the cam rotor 1 rotates, under the combined action of the thrust of the cam rotor 1 and the elastic force of the upper torsion spring 5A and the lower torsion spring 5B, the upper scraper 2A and the lower scraper 2B swing and their free ends are always pressed against the outer periphery of the cam rotor 1, scraping the fluid on the surface of the cam rotor 1.

[0023] The pump chamber includes a cylindrical rotor chamber 301, an upper scraper mounting groove 302, a lower scraper mounting groove 303, a high-pressure fluid pipe 304, and a low-pressure fluid pipe 305. The rotor chamber 301 is formed on the pump body 3. The upper scraper mounting groove 302 and the lower scraper mounting groove 303 are respectively formed on the inner walls of the pump chamber on the upper and lower sides of the rotor chamber 301. The depth of the upper scraper mounting groove 302 and the lower scraper mounting groove 303 is greater than the depth of the rotor chamber 301. The pump body has grooves on the left and right sides of the rotor chamber 301. A high-pressure fluid pipeline 304 and a low-pressure fluid pipeline 305 are provided. The rotor cavity 301 and the high-pressure fluid pipeline 304 are connected at the upper scraper mounting groove 302. The upper part of the low-pressure fluid pipeline 305 is connected to the rotor cavity 301, and the lower part of the low-pressure fluid pipeline 305 is connected to the rotor cavity 301 near the lower scraper mounting groove 303. An oil inlet 9 and an oil outlet 8 are respectively provided on the side wall of the pump body 3, and the oil inlet 9 and the oil outlet 8 are connected to the low-pressure fluid pipeline 305 and the high-pressure fluid pipeline 304, respectively.

[0024] The upper scraper 2A and the lower scraper 2B are respectively placed in the upper scraper mounting groove 302 and the lower scraper mounting groove 303 with a small clearance fit to ensure minimal internal leakage. The ends of the upper scraper 2A and the lower scraper 2B away from the end cover 12 are fixed in the upper scraper mounting groove 302 and the lower scraper mounting groove 303 by the upper torsion spring 5A and the lower torsion spring 5B, respectively.

[0025] The cam rotor 1 has a blade structure. The cam rotor 1 is placed in the rotor cavity 301, and there is a small clearance fit between the cam rotor 1 and the rotor cavity 301. The ends of the upper scraper 2A and the lower scraper 2B press against the outer circumferential surface of the cam rotor 1.

[0026] The scraper-type permanent magnet synchronous electromagnetic pump involved in this embodiment also includes a front bearing 11 and a rear bearing 12. The front bearing 11 and the rear bearing 12 are respectively placed in the front shaft fixing groove and the rear shaft fixing groove. The rotating shafts at both ends of the cam rotor 1 are rotatably connected to the rotating shaft fixing grooves on both sides through the front bearing 11 and the rear bearing 12.

[0027] like Figure 5 As shown, the upper scraper 2A and lower scraper 2B involved in this embodiment have the same structure, both including a cylindrical embedded part 201 and a scraper part 202. One side of the scraper part 202 is fixed on the embedded part 201, and the arc surface of the other side of the scraper part 202 is pressed against the outer peripheral surface 1 of the cam rotor 1. The embedded part 201 is installed in the upper scraper mounting groove 302 or the lower scraper mounting groove 303. An annular groove 203 is opened on the outside of the end of the embedded part 201 away from the end cover 6. The upper torsion spring 5A or the lower torsion spring 5B is sleeved in the annular groove 203. One end of the upper torsion spring 5A or the lower torsion spring 5B is fixed to the embedded part 201, and the other end is fixed to the inner wall of the upper scraper mounting groove 302 or the lower scraper mounting groove 303. The upper torsion spring 5A or the lower torsion spring 5B applies a spring force to the upper scraper 2A or the lower scraper 2B in the direction of the cam rotor 1, ensuring that the other side of the scraper part 202 is pressed against the outer peripheral surface 1 of the cam rotor, thereby improving the sealing performance. At the same time, when the cam rotor 1 rotates, the cam rotor and the scraper can always slide relative to each other and cannot self-lock.

[0028] like Figure 3-4 As shown, in this embodiment, a winding 7 is embedded in the inner wall at the bottom of the pump cavity. Correspondingly, a pair of permanent magnets 4 are embedded in the surface of the cam rotor 1 near the winding 7. The winding 7 and the pair of permanent magnets 4 correspond one-to-one, and the winding 7 is placed on the outer periphery of the corresponding pair of permanent magnets 4. Specifically, several annular grooves are opened in the inner wall at the bottom of the rotor cavity 301, and wires are wound in the annular grooves to form the winding 7. After the winding 7 is energized, an annular magnetic field will be formed in the pump cavity. Several slots are opened in the surface of the cam rotor 1 away from the end cover. The annular grooves correspond one-to-one with the slots, and the annular grooves are placed on the outer periphery of the corresponding slots. The N-pole permanent magnet 3 and the S-pole permanent magnet 4 are embedded in the slots. The N-pole permanent magnet 3 and the S-pole permanent magnet 4 in the annularly arranged slots are arranged in the order of N, S, N, S... to ensure that the magnetic pole sequence can be driven to rotate by the annular magnetic field, thereby driving the cam rotor 1 to rotate.

[0029] The scraper-type permanent magnet synchronous electromagnetic pump involved in this embodiment also includes a sealing ring 13. The sealing ring 13 is fixed at the connection between the end cover 6 and the open end of the pump cavity. The end cover 6 is fixed to the open end of the pump body 3 by the nut 14 and the bolt 15 to achieve a sealed connection between the two.

[0030] The outer periphery shape of the cam rotor 1 involved in this embodiment is a cam profile, which can be a smooth ellipse, semi-ellipse, circle, cycloid, or a combination of various profiles. Figure 3 As shown, in one implementation, the cam rotor 1 is a five-bladed rotor with blades evenly distributed along its circumference, where the blade peaks are arcs and the blade valleys are cycloids. The distance from each point on the cam profile to the peripheral wall of the rotor cavity 301 determines the shape and size of the pump cavity, which, together with the outer diameter of the peripheral wall of the rotor cavity 301, determines the displacement of this invention. The two end faces of the cam rotor 1 are respectively aligned with the bottom inner wall of the rotor cavity 301 and the inner surface of the end cover 3, with a small clearance fit between them to reduce internal leakage.

[0031] The low-pressure fluid pipe 305 is inclined in the same direction as the rotation direction of the cam rotor 1, that is, the low-pressure fluid pipe 305 is located in front of the rotation direction of the cam rotor 1. The high-pressure fluid pipe 304 is inclined in the opposite direction to the rotation direction of the cam rotor 1, that is, the high-pressure fluid pipe 304 is located behind the rotation direction of the cam rotor 1, so that the fluid can flow from the low-pressure fluid pipe 305 into the high-pressure fluid pipe 304 as the cam rotor 1 rotates.

[0032] The pump body 3 is the main connecting and supporting component of this invention, and can be externally connected to the base in various ways. The pump body 3 has designed channels inside, which can not only support and install the scraper 5, but also ensure that the top of the five-bladed scraper 7 always has good contact with the pump body during rotation.

[0033] The specific usage process of the scraper-type permanent magnet synchronous electromagnetic pump involved in this embodiment is as follows:

[0034] After winding 7 is energized, a ring magnetic field is formed in the pump chamber. The ring magnetic field acts on permanent magnet pair 4, thereby driving cam rotor 1 to rotate, which in turn drives upper scraper 2A and lower scraper 2B to rotate synchronously. The oil chamber connected to high-pressure fluid pipeline 304 becomes a high-pressure chamber due to fluid compression, and the oil chamber connected to low-pressure fluid pipeline 305 becomes a low-pressure chamber. Low-pressure fluid pipeline 305 is connected to the oil inlet, and high-pressure fluid pipeline 304 is connected to the oil outlet. Low-pressure fluid continuously enters the pump chamber, and high-pressure fluid continuously outputs, completing the conversion of electrical energy into fluid pressure energy.

[0035] Example 2

[0036] Except for the following mechanisms, this embodiment is the same as that in Embodiment 1.

[0037] In this embodiment, a winding 7 is embedded in the inner surface of the end cover 6. Correspondingly, a pair of permanent magnets 4 are embedded in the surface of the cam rotor 1 near the winding 7. The winding 7 and the pair of permanent magnets 4 correspond one-to-one, and the winding 7 is placed on the outer periphery of the corresponding pair of permanent magnets 4. Specifically, several annular grooves are opened on the inner surface of the end cover 6, and wires are wound in the annular grooves to form the winding 7. After the winding 7 is energized, an annular magnetic field will be formed in the pump cavity. Several slots are opened on the surface of the cam rotor 1 near the winding 7. The annular grooves correspond one-to-one with the slots, and the annular grooves are placed on the outer periphery of the corresponding slots. The N-pole permanent magnet 3 and the S-pole permanent magnet 4 are embedded in the slots. The N-pole permanent magnet 3 and the S-pole permanent magnet 4 in the annularly arranged slots are arranged in the order of N, S, N, S... to ensure that the magnetic pole sequence can be driven to rotate by the annular magnetic field, thereby driving the cam rotor 1 to rotate.

Claims

1. A scraper-type permanent magnet synchronous electromagnetic pump, characterized in that, The main structure includes a cam rotor, scraper, pump body, permanent magnet pair, torsion spring, end cover, winding, oil outlet, and oil inlet. The scraper is divided into an upper scraper and a lower scraper. The permanent magnet pair includes N-pole permanent magnets and S-pole permanent magnets. The torsion spring is divided into an upper torsion spring and a lower torsion spring. A pump chamber is formed inside the pump body, open at one end. The end cover is sealed and fixed to the open end of the pump chamber. A front shaft fixing groove is formed at the bottom of the pump chamber, and a rear shaft fixing groove is formed on the inner surface of the end cover. The cam rotor is installed in the pump chamber with a certain movement clearance. The front and rear shafts of the cam rotor are respectively placed in the front shaft fixing groove and the rear shaft fixing groove and are rotatably connected. The upper and lower scrapers are respectively placed in the pump chambers on the upper and lower sides of the cam rotor. The upper and lower scrapers are fixed to the inner wall of the pump chamber by upper and lower torsion springs respectively. The upper and lower torsion springs apply a spring force pointing towards the center of the cam rotor shaft to the upper and lower scrapers respectively. Together with the rotor shaft, they divide the pump chamber into a low-pressure chamber on the left and a high-pressure chamber on the right. The low-pressure chamber and the high-pressure chamber are connected to the oil inlet and oil outlet respectively. The volume of the low-pressure chamber is larger than that of the high-pressure chamber. The winding is embedded in the inner wall of the bottom of the pump chamber or the inner surface of the end cover. Correspondingly, permanent magnet pairs are embedded in the end face of the cam rotor near the winding. The winding and the permanent magnet pairs correspond one-to-one. The winding is exactly placed on the outer periphery of the corresponding permanent magnet pair. When the cam rotor rotates, the upper and lower scrapers swing and their free ends are always pressed against the outer periphery of the cam rotor, scraping the fluid on the surface of the cam rotor. The cam rotor is a five-lobe rotor evenly distributed along the circumference.

2. The scraper-type permanent magnet synchronous electromagnetic pump according to claim 1, characterized in that, The pump chamber includes a cylindrical rotor chamber, an upper scraper mounting groove, a lower scraper mounting groove, a high-pressure fluid pipe, and a low-pressure fluid pipe. The rotor chamber is formed in the pump body. The upper and lower scraper mounting grooves are respectively formed on the inner walls of the pump chamber on the upper and lower sides of the rotor chamber. The depth of the upper and lower scraper mounting grooves is greater than the depth of the rotor chamber. High-pressure and low-pressure fluid pipes are respectively formed on the left and right circumferences of the pump body around the rotor chamber. The rotor chamber and the high-pressure fluid pipe are connected at the upper scraper mounting groove. The upper part of the low-pressure fluid pipe is connected to the rotor chamber, and the lower part of the low-pressure fluid pipe is attached to the lower scraper mounting groove. The pump body is connected to the rotor cavity. An oil inlet and an oil outlet are respectively opened on the side wall of the pump body. The oil inlet and the oil outlet are connected to the low-pressure fluid pipeline and the high-pressure fluid pipeline, respectively. The upper scraper and the lower scraper are respectively placed in the upper scraper mounting groove and the lower scraper mounting groove with a small clearance fit. The ends of the upper scraper and the lower scraper away from the end cover are fixed in the upper scraper mounting groove and the lower scraper mounting groove by the upper torsion spring and the lower torsion spring, respectively. The cam rotor has a blade structure and is placed in the rotor cavity with a small clearance fit between the cam rotor and the rotor cavity. The ends of the upper scraper and the lower scraper press against the outer circumferential surface of the cam rotor.

3. The scraper-type permanent magnet synchronous electromagnetic pump according to claim 1, characterized in that, The front axle bearing and the rear axle bearing are respectively placed in the front axle fixing groove and the rear axle fixing groove. The rotating shafts at both ends of the cam rotor are rotatably connected to the rotating shaft fixing grooves on both sides through the front axle bearing and the rear axle bearing, respectively.

4. The scraper-type permanent magnet synchronous electromagnetic pump according to claim 2, characterized in that, The upper and lower scrapers have the same structure, both including a cylindrical insert and a scraper. One side of the scraper is fixed to the insert, and the arc surface of the other side of the scraper is pressed against the outer circumferential surface of the cam rotor. The insert is installed in the upper or lower scraper mounting groove. An annular groove is opened on the outside of the end of the insert away from the end cover. An upper or lower torsion spring is sleeved in the annular groove. One end of the upper or lower torsion spring is fixed to the insert, and the other end is fixed to the inner wall of the upper or lower scraper mounting groove.

5. The scraper-type permanent magnet synchronous electromagnetic pump according to claim 2, characterized in that, Several annular grooves are made on the inner wall at the bottom of the rotor cavity or on the inner surface of the end cover. The wires are wound in the annular grooves to form windings. Several slots are made on the surface of the cam rotor away from the end cover. The annular grooves correspond one-to-one with the slots, and the annular grooves are placed on the outer periphery of the corresponding slots. The N-pole permanent magnets and S-pole permanent magnets are embedded in the slots. The N-pole permanent magnets and S-pole permanent magnets in the annularly arranged slots are arranged in the order of N, S, N, S...

6. The scraper-type permanent magnet synchronous electromagnetic pump according to claim 1, characterized in that, The sealing ring is fixed at the connection between the end cover and the open end of the pump chamber, and the end cover is fixed to the open end of the pump body by nuts and bolts.

7. The scraper-type permanent magnet synchronous electromagnetic pump according to claim 1, characterized in that, The cam rotor blades have arc-shaped peaks and cycloid-shaped valleys.

Images