Electromagnetic pump

Abstract

The utility model discloses an electromagnetic pump, which relates to the technical field of engine equipment and comprises a shell, an oil outlet nozzle is arranged on the end face of the shell, a sealing piece is arranged in the oil outlet nozzle, the sealing piece abuts against a groove of an inner side port of the oil outlet nozzle, the sealing piece is fixedly connected with a first electromagnetic core, and a second electromagnetic core is arranged on one side of the first electromagnetic core away from the sealing piece. The first electromagnetic core can move in the height direction of the oil outlet nozzle relative to the second electromagnetic core, and the electromagnetic pump solves the technical problems that the sealing rubber is extruded by the spring and the protruding oil outlet nozzle, pits are generated, and oil leakage occurs.

Description

Technical Field

[0001] The utility model relates to the technical field of engine equipment, in particular to an electromagnetic pump. Background Art

[0002] An electromagnetic pump is a pump that uses electromagnetic force to move fluid. The electromagnetic pump generates a magnetic field to guide the electromagnetic cores to attract each other, without the need for connecting rods, bearings or similar mechanical moving parts. Therefore, it has high reliability and low maintenance costs. Today's common solenoid valves, when closing the oil nozzle of the electromagnetic pump, use a spring to hold the rubber plug so that the rubber plug abuts against the outward protruding oil nozzle. The deformed rubber plug seals the oil outlet of the oil nozzle to prevent oil leakage from the solenoid valve. However, after long-term use, the rubber constantly abuts against the protruding oil nozzle. Under the action of the spring pressure, a pit appears in the rubber plug that can cooperate with the oil nozzle. The pit reduces the degree of contact between the rubber plug and the oil outlet hole, causing the electromagnetic pump to leak oil.

[0003] In summary, developing an electromagnetic pump with a simple structure and reliable and stable sealing effect is an urgent problem to be solved by those skilled in the art. Utility Model Content

[0004] The utility model aims to provide an electromagnetic pump, which solves the technical problem that the sealing effect of the electromagnetic pump seal is reduced during use.

[0005] To achieve the above-mentioned purpose, the utility model provides an electromagnetic pump, including a shell, an oil outlet nozzle is provided on the end face of the shell, a seal is provided inside the oil outlet nozzle, the seal is abutted against the groove of the inner port of the oil outlet nozzle, the seal is fixedly connected to the first electromagnetic core, and the first electromagnetic core is provided with a second electromagnetic core on the side away from the seal, and the first electromagnetic core can move relative to the second electromagnetic core along the height direction of the oil outlet nozzle.

[0006] Preferably, the seal includes an abutting portion and a fixing portion, the end of the abutting portion is a hemisphere, the hemisphere and the fixing portion are connected by a first cone, the tapering direction of the first cone is a direction gradually approaching one end of the hemisphere, the middle section of the fixing portion is provided with a snap-fit ​​groove, and the fixing portion is provided with a second cone at one end away from the abutting portion, and the tapering direction of the second cone is a direction gradually away from one side of the abutting portion.

[0007] Preferably, an oil outlet hole is provided in the oil outlet nozzle, and the oil outlet hole passes through the oil outlet nozzle along the axis of the oil outlet nozzle. The port of the oil outlet hole located on the inner side of the shell is specifically a conical groove, and the tapering direction of the conical groove is a direction gradually away from one side of the inner cavity of the shell, and the side wall of the conical groove fits with the hemisphere.

[0008] Preferably, a mounting cavity is provided at one end of the oil outlet nozzle, and a first mounting portion and a second mounting portion are provided in the mounting cavity. The first mounting portion is closer to the oil outlet nozzle relative to the second mounting portion, the diameter of the second mounting portion is larger than that of the first mounting portion, and a chamfer is provided at the intersection of the first mounting portion and the second mounting portion.

[0009] Preferably, the outer wall of the installation cavity is tapered toward the side away from the oil outlet nozzle, so that the outer wall of the installation cavity has a supporting surface, and the supporting surface abuts against the end surface of the shell to determine the position of the oil outlet nozzle relative to the shell.

[0010] Preferably, a first electromagnetic core is slidably provided in the first mounting portion, a second electromagnetic core is fixedly connected in the second mounting portion, the first electromagnetic core has a mounting hole at one end close to the oil outlet nozzle, the fixing portion is passed through the mounting hole, and the snap-fit ​​groove fixes the seal on the first electromagnetic core.

[0011] Preferably, the first electromagnetic core has a cavity at one end facing away from the seal, and the second electromagnetic core has a mounting groove at one end close to the seal. An elastic member is clamped between the mounting groove and the cavity, and one end of the elastic member is also connected to the clamping groove.

[0012] Preferably, the installation cavity extends into the interior of the shell, and an electromagnetic coil is provided between the inner wall of the shell and the outer wall of the installation cavity. The electromagnetic coil is respectively fitted with the inner wall of the shell and the outer wall of the installation cavity. When the electromagnetic coil is in the off-circuit state, the elastic part compresses and supports the first electromagnetic core, so that the seal engaged with the first electromagnetic core fits with the conical groove, and the oil outlet nozzle is closed. The electromagnetic coil generates a magnetic field in the passage state. Under the action of the magnetic field, the first electromagnetic core moves toward one end close to the second electromagnetic core, the elastic part is compressed, the seal is separated from the conical groove, and the oil outlet nozzle opens.

[0013] Preferably, the electromagnetic coil is connected to a power line.

[0014] Preferably, the oil outlet nozzle, the housing, the first electromagnetic core, the second electromagnetic core and the sealing element are all coaxially arranged.

[0015] With respect to the above-mentioned background technology, the electromagnetic pump provided by the present invention includes: a shell for arranging other components, the shell can be set as a cylindrical shell, an oil nozzle is provided on the end face of the shell, the oil nozzle can be set as a cylinder, the oil nozzle is located at the port inside the shell and has a groove, the end of the groove extends along the axis of the oil nozzle, so that the oil nozzle connects the inner cavity of the shell with the outside world, in addition, the groove of the oil nozzle is provided with a seal on the side away from the oil nozzle, the seal can be tightly abutted with the side wall of the groove, isolating the interior of the shell from the oil nozzle, and preventing oil leakage, further, the seal is fixedly connected to a first electromagnetic core at one end away from the groove, the first electromagnetic core can move in the shell along the axis direction of the oil nozzle, The first electromagnetic core is away from one end of the seal, and a second electromagnetic core is also provided. The second electromagnetic core is fixedly connected to the inside of the shell. When the power is on, the second electromagnetic core can attract the first electromagnetic core. Since the second electromagnetic core is fixedly connected to the shell, only the first electromagnetic core moves toward one end of the second electromagnetic core, and the seal fixedly connected to the first electromagnetic core moves accordingly. The seal is disengaged from the groove, and the oil nozzle is connected to the inner cavity of the shell. The oil in the cavity can be sprayed out from the oil nozzle. When the electromagnetic pump is in the off-circuit state, there is no magnetic field, and there is no interaction force between the first electromagnetic core and the second electromagnetic core. The seal connected to the first electromagnetic core fits against the side wall of the groove, and the oil nozzle is separated from the inner cavity of the shell, so that the oil nozzle is closed. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0017] Figure 1 A cross-sectional view of an electromagnetic pump provided by an embodiment of the present utility model;

[0018] Figure 2 A structural diagram of a sealing member provided in an embodiment of the present utility model;

[0019] Figure 3 A cross-sectional view of the oil outlet nozzle and the mounting cavity provided in an embodiment of the present utility model;

[0020] Figure 4 A cross-sectional view of the electromagnetic pump provided by an embodiment of the present utility model in an open state;

[0021] Figure 5 This is a cross-sectional view of the electromagnetic pump provided by an embodiment of the present utility model in the closed state.

[0022] Among them: 1-shell; 2-oil outlet nozzle; 21-oil outlet hole; 3-seal; 31-abutment part; 311-hemispherical body; 312-first frustum; 32-fixing part; 321-circular step; 322-mounting column; 323-positioning block; 324-second frustum; 4-first electromagnetic core; 5-second electromagnetic core; 6-conical groove; 7-mounting cavity; 71-first mounting part; 72-second mounting part; 8-electromagnetic coil; 9-power cord; 10-elastic member; 11-clamping groove. DETAILED DESCRIPTION

[0023] 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 embodiments described 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 making creative efforts are within the scope of protection of the present invention.

[0024] In order to enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0025] The utility model provides an electromagnetic pump, which includes a shell 1, an inner cavity of the shell 1 for arranging other components, an oil nozzle 2 is provided on the end surface of the shell 1, and the oil nozzle 2 can be set as a cylinder. The oil nozzle 2 is coaxially arranged with the shell 1, and the oil nozzle 2 connects the inner cavity of the shell 1 with the outside world. A groove is provided at the end of the oil nozzle 2 that is connected to the inner cavity of the shell 1, and a sealing member 3 is provided on the side of the groove facing away from the oil nozzle 2. The end of the sealing member 3 can extend into the interior of the groove and fit with the inner side wall of the groove. Furthermore, the sealing member 3 is fixedly connected to a first electromagnetic core 4 at the end facing away from the groove, and the first electromagnetic core 4 can slide relative to the groove along the axis direction of the oil nozzle 2. That is to say, the first electromagnetic core 4 can drive the sealing member 3 to move and realize the abutment and separation of the sealing member 3 and the groove. The opening and closing of the oil nozzle 2 are realized by controlling the movement state of the abutment against the first electromagnetic core 4. The first electromagnetic part is provided with a second electromagnetic core 5 at the end facing away from the seal 3, and the second electromagnetic core 5 is fixed in the inner cavity of the shell 1.

[0026] When the electromagnetic pump is in the working state, the electromagnetic pump is in the passage state, and the electromagnetic pump generates a magnetic field passing through the first electromagnetic core 4 and the second electromagnetic core 5. The magnetic fields of the first electromagnetic core 4 and the second electromagnetic core 5 are in the same direction, and the magnetic poles generated by the opposite end faces of the first electromagnetic core 4 and the second electromagnetic core 5 are opposite. The first electromagnetic core 4 and the second electromagnetic core 5 attract each other, and the second electromagnetic core 5 is fixedly arranged in the shell 1. At this time, only the first electromagnetic core 4 moves toward the side close to the second electromagnetic core 5, and the seal 3 fixedly connected to the first electromagnetic core 4 moves synchronously, the seal 3 is separated from the groove, and the oil outlet nozzle 2 is opened.

[0027] Please refer to the instructions for Figure 2 The sealing member 3 specifically includes an abutting portion 31 and a fixing portion 32. The abutting portion 31 is closer to the groove than the fixing portion 32, and the direction close to the oil outlet nozzle 2 is set to the upper side. Correspondingly, the direction away from the oil outlet nozzle 2 is set to the lower side. The fixing portion 32 can be specifically a hemispherical body 311. The spherical surface is set in a direction opposite to the inner wall of the groove. The diameter of the sphere is smaller than the size of the groove. The hemispherical body 311 can extend into the groove. A first cone 312 is connected below the hemispherical body 311. The tapering direction of the first cone 312 is upward, that is, close to one side of the groove, and the end face diameter of the tapered end of the first cone 312 is the same as the end face diameter of the hemispherical body 311. The first cone 312 also connects the abutting portion 31 and the fixing portion 32. The end portion where the fixing portion 32 is connected to the first cone 312 can be specifically in the shape of a circular step 321. The circular step 321 is a two-layer structure, the diameter of the step on the top is larger than the diameter of the step on the bottom, and the diameters of the two steps are larger than the diameter of the end face of the first cone 312 at the bottom. The mounting post 322 and the positioning block 323 are connected in sequence below the circular step 321, wherein the end of the positioning block 323 connected to the mounting post 322 is a cylinder, and the rest extends downward and gradually shrinks to form a second cone 324. The positioning post is connected between the positioning block 323 and the circular step 321. The hemispherical body 311 of the abutting part 31, the first cone 312 and the circular step 321 of the fixing part 32, the mounting post 322, and the positioning block 323 are all coaxially arranged, and since the diameter of the mounting post 322 is smaller than the diameter of the end face connected at both ends, the circular step 321 and the positioning block 323 form a clamping groove 11 on the outer periphery of the mounting post 322.

[0028] Please refer to the instructions for Figure 3, one end of the oil outlet nozzle 2 is also provided with a mounting cavity 7, which is arranged on the end surface of the shell 1, and the mounting cavity 7 includes a first mounting portion 71 and a second mounting portion 72. The side walls of the first mounting portion 71 and the second mounting portion 72 are both cylindrical surfaces, and the first mounting portion 71 and the second mounting portion 72 are coaxially arranged, wherein the second mounting portion 72 is located at the lower side of the first mounting portion 71, and the diameter of the first mounting portion 71 is smaller than the diameter of the second mounting portion 72. A chamfer is provided at the intersection of the first mounting portion 71 and the second mounting portion 72 to make the transition from the first mounting portion 71 to the second mounting portion 72 smoother, thereby avoiding damage to the inner wall of the mounting cavity 7. The first mounting portion 71 is sheathed with a first electromagnetic core 4, and the second mounting portion 72 is sheathed with a second electromagnetic core 5. The outer wall of each electromagnetic core is in contact with the inner wall of the corresponding mounting portion, and a mounting hole is provided at the upper end of the first electromagnetic core 4. When setting the seal 3, the aperture of the mounting hole is larger than the diameter of the lower end face of the second cone 324 and smaller than the diameter of the upper end face of the second cone 324. The material of the seal 3 can be elastic rubber. The lower small diameter end face of the second cone 324 is extended into the mounting hole and the seal 3 is pressed. Gradually, the second cone 324 of the seal 3 is deformed until the upper end face of the second cone 324 passes through the mounting hole. The mounting post 322 is penetrated into the mounting hole. The downward-tapered side wall of the second cone 324 facilitates the installation of the seal 3. The cylinder connected to one end of the mounting post 322 ensures the strength of the positioning block 323 to prevent the seal 3 from falling off from above the mounting hole. The outer wall of the mounting cavity 7 tapers downwardly so that the outer wall of the mounting cavity 7 has a supporting surface. When the mounting cavity 7 is inserted into the shell 1, the supporting surface abuts against the end face of the shell 1 to determine the position of the oil nozzle 2 at the end of the shell 1.

[0029] Furthermore, the lower end of the first electromagnetic core 4 has a cavity, and the upper end of the second electromagnetic core 5 is provided with a mounting groove. The port of the mounting groove can cooperate with the port of the cavity. An elastic member 10 is clamped between the mounting groove and the cavity. The elastic member 10 can be specifically a compression spring. One end of the compression spring extends into and abuts against the mounting groove, and the other end abuts against the side wall of the second cone 324, further abutting the compression spring against the second cone 324, and also deforming the second cone 324. The other end of the compression spring is fixed in the clamping groove 11, so that the seal 3 and the first electromagnetic core 4 can move together with the deformation of the compression spring.

[0030] Please continue to refer to the instructions Figure 3The oil outlet nozzle 2 connects the interior of the mounting cavity 7 with the outside world. An oil outlet hole 21 is provided along the axis of the oil outlet nozzle 2. The diameter of the oil outlet hole 21 is divided into two sections. The diameter of the hole in the upper half is larger than that of the hole in the lower half. A groove is provided at the end of the oil outlet hole 21 located inside the mounting cavity 7. The groove can be specifically a conical groove 6. The inner side wall of the conical groove 6 gradually shrinks upwards, and the port diameter of the conical groove 6 is larger than the diameter of the end face of the hemispherical body 311 of the seal 3. The abutment portion 31 of the seal 3 is directed to the inner side of the mounting cavity 7. The upward movement causes the hemispherical body 311 to enter the end of the conical groove 6. Since the cross-sections of the conical groove 6 and the hemispherical body 311 are both circular, and as the conical groove 6 is gradually extended into the conical groove 6, the diameter of the cross-section circle decreases until the side wall of the conical groove 6 fits the spherical surface of the hemispherical body 311. The seal 3 is also supported by the compression spring. The elastic seal 3 is deformed and further squeezed into the conical groove 6. The spherical surface of the hemispherical body 311 squeezes the side wall of the conical surface, thereby enhancing the sealing effect of the seal 3. The end of the seal 3 is hemispherical. The hemispherical body 311 gradually deforms during the process of extending into the conical groove 6 and being in contact with it for a long time, and the contact area with the side wall of the conical groove 6 increases, further increasing the sealing degree of the seal 3 to the conical groove 6, and avoiding the seal 3 being deformed due to long-term contact with the oil outlet port 2, which reduces the sealing effect of the seal 3. In addition, the end of the seal 3 is a hemispherical body 311, and the side wall of the conical groove 6 abutting therewith is a gradually tapered slope, so the end of the seal 3 can easily move along the conical groove 6. The side wall of the conical surface slides, and the diameter of the port of the conical groove 6 is larger than the diameter of the hemisphere 311. When the position of the seal 3 is offset, the hemisphere 311 abuts against the tapered slope of the conical groove 6. With the push of the compression spring, the hemisphere 311 slides along the tapered slope until the hemisphere 311 fits with the side wall of the conical groove 6. The oil outlet hole 21 port and the seal 3 with the above structure enable the seal 3 to automatically correct its own position, ensuring that the seal 3 can accurately seal the oil outlet hole 21 port.

[0031] Please refer to the instructions for Figure 4 , attached Figure 4When the electromagnetic pump is in the open state, the mounting cavity 7 partially extends into the shell 1, and an electromagnetic pump coil is provided between the mounting cavity 7 and the inner wall of the shell 1. The electromagnetic coil 8 fills the inner cavity of the shell 1, and the electromagnetic coil 8 is connected to the power cord 9. When the power cord 9 transmits current to the electromagnetic coil, the electromagnetic coil 8 generates a magnetic field. Since the first electromagnetic core 4 and the second electromagnetic core 5 are both located on the inner side of the electromagnetic coil 8, that is, the directions of the magnetic fields passing through the first electromagnetic core 4 and the second electromagnetic core 5 are the same, naturally, the magnetic poles generated on the opposite end faces of the first electromagnetic core 4 and the second electromagnetic core 5 are opposite, and the first electromagnetic core 4 and the second electromagnetic core 5 attract each other. Since the second electromagnetic core 5 is fixed inside the shell 1 and the position of the second electromagnetic core 5 is fixed, the first electromagnetic core 4 overcomes the elastic force of the compression spring and moves toward the side close to the second electromagnetic core 5, and moves together with the seal 3 connected to the first electromagnetic core 4. The seal 3 detaches from the conical groove 6, and the oil outlet nozzle 2 is connected to the inside of the mounting cavity 7, and the oil can be sprayed out from the oil outlet nozzle 2.

[0032] Please refer to the instructions for Figure 5 , attached Figure 5 The electromagnetic pump is in the closed state. When the power cord 9 stops outputting current to the electromagnetic coil 8, the magnetic field disappears, and the magnetic force between the first electromagnetic core 4 and the second electromagnetic core 5 disappears. There is no force and the elastic force of the elastic member 10 is balanced. The elastic member 10 pushes the first electromagnetic core 4 upward, so that the sealing member 3 is pressed into the conical groove 6, thereby closing the oil outlet nozzle 2.

[0033] It should be noted that, in this specification, relational terms such as first and second are merely used to distinguish one entity from other entities, but do not necessarily require or imply any actual relationship or order between these entities.

[0034] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. It should be noted that those skilled in the art can make various improvements and modifications to the present invention without departing from the principles of the present invention, and such improvements and modifications also fall within the scope of protection of the present invention.

Claims

1. An electromagnetic pump, characterized in that: The invention comprises a shell (1), an oil outlet nozzle (2) is provided on the end surface of the shell (1), a sealing member (3) is provided inside the oil outlet nozzle (2), the sealing member (3) abuts against a groove of an inner port of the oil outlet nozzle (2), the sealing member (3) is fixedly connected to a first electromagnetic core (4), a second electromagnetic core (5) is provided on the side of the first electromagnetic core (4) away from the sealing member (3), and the first electromagnetic core (4) can move relative to the second electromagnetic core (5) along the height direction of the oil outlet nozzle (2).

2. The electromagnetic pump according to claim 1, characterized in that The sealing member (3) comprises an abutting portion (31) and a fixing portion (32), wherein the end of the abutting portion (31) is a hemisphere (311), the hemisphere (311) and the fixing portion (32) are connected via a first truncated cone (312), the first truncated cone (312) gradually shrinks in a direction gradually approaching one end of the hemisphere (311), a clamping groove (11) is provided in a middle section of the fixing portion (32), and a second truncated cone (324) is provided at one end of the fixing portion (32) away from the abutting portion (31), and the second truncated cone (324) gradually shrinks in a direction gradually away from one side of the abutting portion (31).

3. The electromagnetic pump according to claim 2, characterized in that An oil outlet hole (21) is provided in the oil outlet nozzle (2), and the oil outlet hole (21) passes through the oil outlet nozzle (2) along the axis of the oil outlet nozzle (2). The port of the oil outlet hole (21) located on the inner side of the shell (1) is specifically a conical groove (6), and the conical groove (6) gradually shrinks in a direction that gradually turns away from one side of the inner cavity of the shell (1). The side wall of the conical groove (6) is in contact with the hemisphere (311).

4. The electromagnetic pump according to claim 3, characterized in that A mounting cavity (7) is provided at one end of the oil outlet nozzle (2), wherein a first mounting portion (71) and a second mounting portion (72) are provided in the mounting cavity (7); the first mounting portion (71) is closer to the oil outlet nozzle (2) relative to the second mounting portion (72); the second mounting portion (72) has a larger diameter than the first mounting portion (71); and a chamfer is provided at the intersection of the first mounting portion (71) and the second mounting portion (72).

5. The electromagnetic pump according to claim 4, characterized in that The outer wall of the installation cavity (7) gradually shrinks toward the side away from the oil outlet nozzle (2), so that the outer wall of the installation cavity (7) has a supporting surface, and the supporting surface abuts against the end surface of the shell (1) to determine the position of the oil outlet nozzle (2) relative to the shell (1).

6. The electromagnetic pump according to claim 4, characterized in that The first electromagnetic core (4) is slidably mounted in the first mounting portion (71), and the second electromagnetic core (5) is fixedly connected in the second mounting portion (72). The first electromagnetic core (4) has a mounting hole at one end close to the oil outlet nozzle (2), the fixing portion (32) is inserted into the mounting hole, and the snap-fit ​​groove (11) fixes the sealing member (3) to the first electromagnetic core (4).

7. The electromagnetic pump according to claim 6, characterized in that The first electromagnetic core (4) has a cavity at one end facing away from the sealing member (3), and the second electromagnetic core (5) has a mounting groove at one end close to the sealing member (3). An elastic member (10) is clamped between the mounting groove and the cavity, and one end of the elastic member (10) is also connected to the clamping groove (11).

8. The electromagnetic pump according to claim 7, characterized in that The installation cavity (7) extends into the interior of the shell (1), and an electromagnetic coil (8) is provided between the inner wall of the shell (1) and the outer wall of the installation cavity (7). The electromagnetic coil (8) is respectively in contact with the inner wall of the shell (1) and the outer wall of the installation cavity (7). When the electromagnetic coil (8) is in an off-circuit state, the elastic member (10) compresses and supports the first electromagnetic core (4), so that the sealing member (3) engaged with the first electromagnetic core (4) is in contact with the conical groove (6), and the oil outlet nozzle (2) is closed. When the electromagnetic coil (8) is in an on-circuit state, a magnetic field is generated. Under the action of the magnetic field, the first electromagnetic core (4) moves toward one end close to the second electromagnetic core (5), the elastic member (10) is compressed, the sealing member (3) is separated from the conical groove (6), and the oil outlet nozzle (2) is opened.

9. The electromagnetic pump according to claim 8, characterized in that The electromagnetic coil (8) is connected to a power line (9).

10. The electromagnetic pump according to any one of claims 1 to 9, characterized in that: The oil outlet nozzle (2), the housing (1), the first electromagnetic core (4), the second electromagnetic core (5) and the sealing element (3) are all coaxially arranged.

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