Scraper type permanent magnet synchronous electromagnetic pump

Abstract

A pump cavity is formed in a pump body of the scraper type permanent magnet synchronous electromagnetic pump, one end of the pump cavity is open, an end cover is fixed to the open end of the pump cavity in a sealed mode, a cam rotor is installed in the pump cavity, and rotating shafts at the front end and the rear end of the cam rotor are rotationally connected with the end cover and the pump body correspondingly. One end of the upper scraping plate and one end of the lower scraping plate are fixed to the inner wall of the pump cavity through an upper torsional spring and a lower torsional spring correspondingly to divide the pump cavity into a low-pressure cavity on the left side and a high-pressure cavity on the right side, and the upper torsional spring and the lower torsional spring apply elastic force pointing to the axis of the cam rotor to the upper scraping plate and the lower scraping plate correspondingly. A winding is embedded into the inner wall of the bottom of a pump cavity or the inner surface of an end cover, correspondingly, a permanent magnet pair is embedded into the end face, close to the winding, of a cam rotor, the cam rotor rotates, an upper scraper blade and a lower scraper blade swing, and the free ends of the upper scraper blade and the lower scraper blade abut against the outer circumferential face of the cam rotor all the time to scrape fluid on the surface of the cam rotor. And the overall stability is improved.

Description

Technical Field

[0001] The invention relates to the technical field of electromagnetic pumps, and in particular to a scraper-type permanent magnet synchronous electromagnetic pump. Background Art

[0002] Traditional single-acting or double-acting vane pumps have a loose structure because the blades have to reciprocate in their own installation grooves, and the blade body in the groove must always be long enough for guidance. In addition, as the pressure increases, the friction between the blades and the groove wall increases, the reciprocating movement is delayed, and the internal leakage increases. In order to improve the stability of the vane pump, the utility model patent with application number 202010933822.0 discloses an inner rotor swing scraper pump, which uses a swing scraper to replace the reciprocating blades of a traditional vane pump, achieves high-pressure output through pressure self-sealing, and improves volume utilization through the inner rotor profile parameters, forming a valveless flow distribution system, high pressure, compact structure, and high-speed and efficient fluid pump. Then it requires a motor to drive the rotor to rotate, which reduces the overall stability and sealing. In addition, the sealing between the scraper and the rotor needs to be improved. Summary of the invention

[0003] In order to overcome the deficiencies of the prior art, the present invention provides a scraper-type permanent magnet synchronous electromagnetic pump, which solves the problem that the overall stability and sealing performance of the existing blade-type scraper pump need to be improved.

[0004] To achieve the above-mentioned purpose, the present invention relates to a scraper-type permanent magnet synchronous electromagnetic pump, whose main structure includes a cam rotor, a scraper, a pump body, a permanent magnet pair, a torsion spring, an end cover, a winding, an oil outlet and an oil inlet, wherein the scraper is divided into an upper scraper and a lower scraper, the permanent magnet pair includes an N-pole permanent magnet and an S-pole permanent magnet, and the torsion spring is divided into an upper torsion spring and a lower torsion spring; a pump chamber is provided in the pump body, one end of the pump chamber is open, the end cover is sealed and fixed to the open end of the pump chamber, a front axle fixing groove is provided at the bottom of the pump chamber, and a rear axle fixing groove is provided on the inner surface of the end cover, the cam rotor is installed in the pump chamber and has a certain movement gap between the cam rotor and the pump chamber, the rotating shafts at the front and rear ends of the cam rotor are respectively placed in the front axle fixing groove and the rear axle fixing groove and are both rotatably connected, and the upper scraper and the lower scraper are respectively placed on the upper and lower sides of the cam rotor. In 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 torsion spring and the lower torsion spring respectively, and the upper torsion spring and the lower torsion spring respectively apply an elastic force pointing to the axis of the cam rotor to the upper scraper and the lower scraper, and together with the rotor shaft, the pump chamber is divided 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 with the oil inlet and the 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, and correspondingly, a permanent magnet pair is embedded in the end face of the cam rotor close to the winding. The winding and the permanent magnet pair correspond one to one, and the winding is just placed on the outer periphery of the corresponding permanent magnet pair. When the cam rotor rotates, the upper scraper and the lower scraper swing and their free ends are always pressed against the outer peripheral surface of the cam rotor to scrape 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 pipeline and a low-pressure fluid pipeline. The rotor chamber is opened on the pump body. The upper scraper mounting groove and the lower scraper mounting groove are respectively opened on the inner wall of the pump chamber on the upper and lower sides of the rotor chamber. The depth of the upper scraper mounting groove and the lower scraper mounting groove is greater than the depth of the rotor chamber. The high-pressure fluid pipeline and the low-pressure fluid pipeline are respectively opened on the pump body on the left and right sides of the rotor chamber. The rotor chamber and the high-pressure fluid pipeline are connected at the upper scraper mounting groove, the upper part of the low-pressure fluid pipeline is connected with the rotor chamber, and the lower part of the low-pressure fluid pipeline is adjacent to the lower scraper mounting groove. The upper scraper and the lower scraper are respectively placed in the upper scraper mounting groove and the lower scraper mounting groove and are matched with a small gap. The ends of the upper scraper and the lower scraper away from the end cover are respectively fixed in the upper scraper mounting groove and the lower scraper mounting groove by an upper torsion spring and a lower torsion spring. The cam rotor is a blade type structure. The cam rotor is placed in the rotor cavity, and the cam rotor and the rotor cavity are matched with a small gap. The ends of the upper scraper and the lower scraper are pressed against the outer peripheral surface of the cam rotor.

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

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

[0008] A plurality of annular grooves are provided on the inner wall at the bottom of the rotor cavity or the inner surface of the end cover, and the conducting wires are wound in the annular grooves to form windings. A plurality of slot holes are provided on the surface of the cam rotor away from the end cover, and the annular grooves correspond to the slot holes one by one, and the annular grooves are placed on the outer periphery of the corresponding slot holes. N-pole permanent magnets and S-pole permanent magnets are embedded in the slot holes, and the N-pole permanent magnets and S-pole permanent magnets in the annularly arranged slot holes 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 peripheral 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-blade rotor evenly distributed along the circumference, with the blade peaks being circular 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 by a cam blade rotor, which cooperates with the upper and lower scrapers to improve the overall stability; (2) a permanent magnet is embedded in the five-blade scraper, and a wire is wound on one side of the pump body as a stator winding. The annular magnetic field formed by the stator winding by asynchronous alternating current is used to drive the permanent magnet on the five-blade scraper to rotate, thereby realizing the rotation of the scraper, and a swinging scraper is used instead of a reciprocating blade, and pressure self-sealing is realized at the same time, forming a new type of fluid pump without a distribution valve, high pressure, compact structure, high speed and high efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

[0015] Figure 3 It 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 of the scraper and torsion spring involved in Example 1.

[0018] Among them: 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 channel, 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 DESCRIPTION

[0019] In order to more clearly illustrate the content of the present invention, the present invention is further described below in conjunction with 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 permanent magnet pair 4, a torsion spring 5, an end cover 6, a winding 7, an oil outlet 8 and an oil inlet 9, wherein 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, and the torsion spring 5 is divided into an upper torsion spring 5A and a lower torsion spring 5B;

[0022] A pump chamber is provided in the pump body 3, one end of the pump chamber is open, an end cover 6 is sealed and fixed at the open end of the pump chamber, a front axle fixing groove is provided at the bottom of the pump chamber, a rear axle fixing groove is provided on the inner surface of the end cover 6, a cam rotor 1 is installed in the pump chamber and has a certain movement gap with the pump chamber, the rotating shafts at the front and rear ends of the cam rotor 1 are respectively placed in the front axle fixing groove and the rear axle fixing groove and are both rotatably connected, an upper scraper 2A and a 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 are respectively fixed to the inner wall of the pump chamber by an upper torsion spring 5A and a lower torsion spring 5B, the upper torsion spring 5A and the lower torsion spring 5B respectively exert a force pointing to the axis of the cam rotor 1 on the upper scraper 2A and the lower scraper 2B 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 greater than that of the high-pressure chamber. The winding 7 is embedded in the inner wall of the bottom of the pump chamber. Correspondingly, the permanent magnet pair 4 is embedded in the end face of the cam rotor 1 close to the winding 7. The winding 7 and the permanent magnet pair 4 correspond one to one. The winding 7 is just placed on the outer periphery of the corresponding permanent magnet pair 4. The cam rotor 1 rotates. Under the joint 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 peripheral surface of the cam rotor 1 to scrape 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 pipeline 304 and a low-pressure fluid pipeline 305. The rotor chamber 301 is opened on the pump body 3, and the upper scraper mounting groove 302 and the lower scraper mounting groove 303 are respectively opened on the inner wall 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 on the left and right sides of the rotor chamber 301 is respectively provided with a plurality of upper scraper mounting grooves 302 and 303. 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 installation 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 installation groove 303, and 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 respectively connected to the low-pressure fluid pipeline 305 and the high-pressure fluid pipeline 304,

[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 and are matched with a small gap 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 is a blade-type structure. The cam rotor 1 is placed in the rotor cavity 301 , and there is a small gap between the cam rotor 1 and the rotor cavity 301 . The ends of the upper scraper 2A and the lower scraper 2B are pressed against the outer peripheral 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, which are respectively placed in the front shaft fixing groove and the rear shaft fixing groove, and 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 the lower scraper 2B involved in this embodiment have the same structure, both including a cylindrical embedded portion 201 and a scraper portion 202, one side of the scraper portion 202 is fixed on the embedded portion 201, and the arc surface of the other side of the scraper portion 202 is pressed against the outer peripheral surface 1 of the cam rotor 1, the embedded portion 201 is installed in the upper scraper mounting groove 302 or the lower scraper mounting groove 303, and an annular groove 203 is provided on the outside of the end of the embedded portion 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 portion 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 elastic force to the upper scraper 2A or the lower scraper 2B toward the cam rotor 1, ensuring that the other side of the scraper portion 202 is pressed tightly against the outer peripheral surface 1 of the cam rotor to improve 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, the present embodiment involves embedding winding 7 on the inner wall at the bottom of the pump cavity, and correspondingly, embedding permanent magnet pair 4 on the surface of the cam rotor 1 close to the winding 7, the winding 7 and the permanent magnet pair 4 correspond one to one, and the winding 7 is just placed on the outer periphery of the corresponding permanent magnet pair 4, specifically: a plurality of annular grooves are provided on the inner wall at the bottom of the rotor cavity 301, and the wire is wound in the annular groove to form the winding 7. After the winding 7 is energized, an annular magnetic field will be formed in the pump cavity, a plurality of slots are provided on the surface of the cam rotor 1 away from the end cover, the annular grooves correspond one to one to 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, and 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, which is fixed at the connection between the end cover 6 and the open end of the pump chamber. The end cover 6 is fixed to the open end of the pump body 3 by a nut 14 and a bolt 15 to achieve a sealed connection between the two.

[0030] The outer peripheral 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 other profile or a combination of profiles. Figure 3 As shown, as an implementation method, the cam rotor 1 is a five-blade rotor evenly distributed along the circumference, with the blade peaks being arcs and the blade valleys being cycloids. The distance between each point on the cam profile and the peripheral wall of the rotor cavity 301 determines the shape and size of the pump cavity, and together with the outer diameter of the peripheral wall of the rotor cavity 301, determines the displacement of the invention. The two end faces of the cam rotor 1 are respectively facing the bottom inner wall of the rotor cavity 301 and the inner surface of the end cover 3, with a small gap between them to reduce internal leakage.

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

[0032] The pump body 3 is the main connection and support member of the present invention, and can be externally connected to the base in various ways. The pump body 3 is designed with a channel to support and install the scraper 5 and ensure that the top of the five-blade scraper 7 is always in good contact with the pump body during the rotation process.

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

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

[0035] Example 2

[0036] Except for the following mechanism, the rest of this embodiment is the same as that of embodiment 1.

[0037] The present embodiment involves embedding winding 7 on the inner surface of end cover 6, and correspondingly, embedding permanent magnet pair 4 on the surface of cam rotor 1 close to winding 7, winding 7 and permanent magnet pair 4 correspond one to one, and winding 7 is just placed on the outer periphery of corresponding permanent magnet pair 4, specifically: a plurality of annular grooves are provided on the inner surface of end cover 6, and wires are wound in the annular grooves to form winding 7, and after winding 7 is energized, an annular magnetic field will be formed in the pump cavity, a plurality of slot holes are provided on the surface of cam rotor 1 close to winding 7, the annular grooves correspond one to one to the slot holes, and the annular grooves are placed on the outer periphery of corresponding slot holes, N-pole permanent magnet 3 and S-pole permanent magnet 4 are embedded in the slot holes, and the N-pole permanent magnet 3 and S-pole permanent magnet 4 in the annularly arranged slot holes 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 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, a scraper, a pump body, a permanent magnet pair, a torsion spring, an end cover, a winding, an oil outlet and an oil inlet, wherein the scraper is divided into an upper scraper and a lower scraper, the permanent magnet pair includes an N-pole permanent magnet and an S-pole permanent magnet, and the torsion spring is divided into an upper torsion spring and a lower torsion spring; a pump chamber is opened in the pump body, one end of the pump chamber is open, the end cover is sealed and fixed to the open end of the pump chamber, a front axle fixing groove is opened at the bottom of the pump chamber, and a rear axle fixing groove is opened on the inner surface of the end cover; the cam rotor is installed in the pump chamber and has a certain movement gap with the pump chamber; the rotating shafts at the front and rear ends of the cam rotor are respectively placed in the front axle fixing groove and the rear axle fixing groove and are both rotatably connected; the upper scraper and the lower scraper are respectively placed in the pump chamber on the upper and lower sides of the cam rotor; the upper scraper and the lower scraper are connected to the pump chamber. The ends are fixed to the inner wall of the pump chamber by upper torsion springs and lower torsion springs respectively. The upper torsion springs and lower torsion springs respectively apply an elastic force pointing to the axis of the cam rotor to the upper scraper and the lower scraper, and together with the rotor shaft, the pump chamber is divided 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 respectively connected to the oil inlet and the oil outlet. The volume of the low-pressure chamber is greater than that of the high-pressure chamber. A winding is embedded in the inner wall of the bottom of the pump chamber or the inner surface of the end cover. Correspondingly, a permanent magnet pair is embedded in the end face of the cam rotor close to the winding. The winding and the permanent magnet pair correspond one to one, and the winding is just placed on the outer periphery of the corresponding permanent magnet pair. When the cam rotor rotates, the upper scraper and the lower scraper swing and their free ends are always pressed against the outer peripheral surface of the cam rotor to scrape the fluid on the surface of the cam rotor.

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 pipeline and a low-pressure fluid pipeline. The rotor chamber is opened on the pump body. The upper scraper mounting groove and the lower scraper mounting groove are respectively opened on the inner wall of the pump chamber on the upper and lower sides of the rotor chamber. The depth of the upper scraper mounting groove and the lower scraper mounting groove is greater than the depth of the rotor chamber. The high-pressure fluid pipeline and the low-pressure fluid pipeline are respectively opened on the pump body on the left and right sides of the rotor chamber. The rotor chamber and the high-pressure fluid pipeline are connected at the upper scraper mounting groove, the upper part of the low-pressure fluid pipeline is connected with the rotor chamber, and the lower part of the low-pressure fluid pipeline is adjacent to the lower scraper mounting groove. The upper scraper and the lower scraper are respectively placed in the upper scraper mounting groove and the lower scraper mounting groove and are matched with a small gap. The ends of the upper scraper and the lower scraper away from the end cover are respectively fixed in the upper scraper mounting groove and the lower scraper mounting groove by an upper torsion spring and a lower torsion spring. The cam rotor is a blade type structure. The cam rotor is placed in the rotor cavity, and the cam rotor and the rotor cavity are matched with a small gap. The ends of the upper scraper and the lower scraper are pressed against the outer peripheral surface of the cam rotor.

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

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

5. The scraper type permanent magnet synchronous electromagnetic pump according to claim 2, characterized in that: A plurality of annular grooves are provided on the inner wall at the bottom of the rotor cavity or the inner surface of the end cover, and the conducting wires are wound in the annular grooves to form windings. A plurality of slot holes are provided on the surface of the cam rotor away from the end cover, and the annular grooves correspond to the slot holes one by one, and the annular grooves are placed on the outer periphery of the corresponding slot holes. N-pole permanent magnets and S-pole permanent magnets are embedded in the slot holes, and the N-pole permanent magnets and S-pole permanent magnets in the annularly arranged slot holes 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 outer peripheral shape of the cam rotor is a cam profile, which can be a smooth ellipse, semi-ellipse, circle, cycloid or a combination of profiles.

8. The scraper type permanent magnet synchronous electromagnetic pump according to claim 1, characterized in that: The cam rotor is a five-blade rotor evenly distributed along the circumference, with the blade peaks being circular arcs and the blade valleys being cycloids.

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