Electromagnetic coil and electromagnetic clutch speed regulation water pump

Abstract

According to the electromagnetic coil and the electromagnetic clutch speed regulation water pump, the electromagnetic coil comprises an iron core assembly and a coil wound in the iron core assembly, the iron core assembly comprises an iron core inner ring and an iron core outer ring, and the iron core assembly further comprises an annular magnet clamped between the end side of the iron core inner ring and the end side of the iron core outer ring; and a space for winding the coil is formed among the iron core inner ring, the annular magnet and the iron core outer ring. When the electromagnetic coil is not electrified, the output of a magnetic field is formed between the iron core inner ring and the iron core outer ring, and the magnetic field intensity of the whole iron core assembly can be determined by the radial position and the size of the annular magnet between the iron core inner ring and the iron core outer ring.

Description

Technical Field

[0001] The invention relates to an electromagnetic coil and an electromagnetic clutch speed regulating water pump. Background Art

[0002] In the prior art, automobile engines widely use water pump structures to provide coolant to prevent overheating and burning.

[0003] When the temperature is normal, the water pump only needs to cool the engine with low speed and small flow of cooling water. When the engine temperature is very high, the water pump needs to cool the engine with high speed and large flow of cooling water. Therefore, the water pump needs to be able to switch between high and low speeds and large and small flow rates to cool the engine with water. This can achieve energy conservation and emission reduction, and is more environmentally friendly.

[0004] An existing electromagnetic speed-regulating water pump, such as a power-off meshing type electromagnetic energy-saving water pump described in Patent No. CN214741627U, comprises a pump body, an iron core sleeved on the pump body, a driving wheel, and a magnetic induction mechanism fixed on the shaft bearing, wherein the magnetic induction mechanism comprises a driven plate, a magnet fixing plate, and a spring sheet connected between the magnet fixing plate and the driven plate.

[0005] A coil is fixed inside the iron core by potting glue to form a conventional electromagnetic coil. When the coil is energized, electromagnetic force is generated, and when the coil is de-energized, there is no electromagnetic force.

[0006] A penetrating magnetic leakage groove is provided on the end wall of the driving wheel facing the coil, and a permanent magnet is fixed in the magnetic leakage groove. The electromagnetic force generated by the electromagnetic coil being energized offsets the magnetic force of the permanent magnet, and the driven disk is disconnected from the driving wheel. The water pump cools the engine with low-speed and small-flow cooling water. However, since the permanent magnet is installed on the driving wheel, it is necessary to provide a magnetic leakage groove on the driving wheel and set corresponding related structures. When the water pump has multiple torque requirements, the structure needs to be redesigned and a separate mold needs to be opened for each torque requirement.

[0007] Generally speaking, the cost of a simple mold may range from several thousand yuan to tens of thousands of yuan, while the cost of a complex mold may reach hundreds of thousands or even millions of yuan, and the production cost is relatively high.

[0008] Therefore, it is necessary to provide an electromagnetic coil that has magnetic force even when it is not powered, and to facilitate the design and adjustment of its magnetic strength to meet the needs of water pumps with different torque requirements. Application of this in water pumps can greatly reduce the mold opening cost and production cost of the water pump. Summary of the invention

[0009] The technical problem to be solved by the present invention is to provide an electromagnetic coil.

[0010] In order to solve the above technical problems, the technical solution adopted by the present invention is: an electromagnetic coil, including an iron core assembly, a coil wound in the iron core assembly, the iron core assembly includes an iron core inner ring, an iron core outer ring, the iron core assembly also includes an annular magnet sandwiched between the bottom ends of the iron core inner ring and the iron core outer ring, and a space for winding the coil is formed between the iron core inner ring, the annular magnet and the iron core outer ring.

[0011] In some embodiments, the annular magnet is radially magnetized with the center of the circle as a reference, so that one of the outer ring and the inner ring is an N pole and the other is an S pole.

[0012] In some embodiments, the annular magnet is a closed magnetic ring composed of a plurality of sector-shaped magnets, or is an integrally formed closed magnetic ring.

[0013] In certain embodiments, the electromagnetic coil further comprises a magnetic path blocking plate made of a non-magnetic material and fixed to the bottom of the core assembly, wherein the outer edge of the magnetic path blocking plate is flush with or extends out from the outer edge of the outer ring of the core.

[0014] In some embodiments, at least one of the core inner ring and the core outer ring is fixedly mounted on the magnetic circuit blocking plate by screws.

[0015] In some embodiments, the bottom of at least one of the inner ring of the core and the outer ring of the core has a clamping bottom ring extending radially, the annular magnet is clamped between the bottom of the inner ring of the core and the bottom of the outer ring of the core by the clamping bottom ring, and the clamping bottom ring is fixed to the magnetic circuit blocking plate by screws.

[0016] Another technical problem to be solved by the present invention is to provide an electromagnetic clutch speed regulating water pump.

[0017] In order to solve the above technical problems, the technical solution adopted by the present invention is: an electromagnetic clutch speed-regulating water pump using the electromagnetic coil described in any one of the above embodiments, comprising a pump body, a shaft rotatably arranged in the pump body, a pulley rotatably sleeved on the pump body, and a driven disc fixed at the end of the shaft, wherein the electromagnetic coil is located in the cavity of the pulley and fixed at one end of the pump body, the magnetic force direction of the annular magnet is opposite to the magnetic force direction of the electromagnetic force generated when the coil is energized, and also comprises a suction cup assembly which is gap-sleeved on the shaft and locked with the pulley, wherein the suction cup assembly is located between the driven disc and the electromagnetic coil, and comprises a fixed portion on the pulley and corresponding to the position of the electromagnetic coil. The outer ring of the suction cup of the outer ring of the iron core, the inner ring of the suction cup corresponding to the inner ring of the iron core, and the magnetic circuit blocking ring made of non-magnetic material sandwiched between the outer ring of the suction cup and the inner ring of the suction cup, the annular magnet and the suction cup assembly are respectively located on opposite sides of the coil, the driven disk includes a magnetic driven disk, and the magnetic driven disk faces the suction cup assembly. When the coil is energized, the magnetic force of the annular magnet offsets the electromagnetic force generated when the coil is energized, and the magnetic driven disk is disengaged from the suction cup assembly. When the coil is de-energized, the magnetic circuit of the annular magnet passes through the suction cup assembly and the magnetic driven disk to form a closed loop, so that the magnetic driven disk is engaged with the suction cup assembly.

[0018] In some embodiments, the driven disk further comprises an induction driven disk, an induction magnet is fixed on an outer edge of a circle of the pulley, and an iron sheet for cutting the magnetic lines of force of the induction magnet is provided on the outer edge of the induction driven disk.

[0019] In some embodiments, the driven disk also includes a barrier sleeve made of non-magnetic material and fixedly mounted on the end of the shaft, the inductive driven disk and the magnetic driven disk are fixed on the outer end of the barrier sleeve, and the bottom end of the barrier sleeve extends into the bottom of the coil hole.

[0020] In some embodiments, the inner ring of the suction cup is gap-sleeved on the barrier sleeve, and the magnetic circuit barrier ring is interference-fittedly arranged between the inner ring of the suction cup and the outer ring of the suction cup.

[0021] The scope of the present invention is not limited to the technical solutions formed by the specific combination of the above technical features, but also includes other technical solutions formed by any combination of the above technical features or their equivalent features. For example, the above features are replaced with (but not limited to) technical features with similar functions disclosed in this application.

[0022] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art: 1. The present invention provides an electromagnetic coil and an electromagnetic clutch speed regulating water pump. When the electromagnetic coil is not energized, a magnetic field output is formed between the inner ring of the iron core and the outer ring of the iron core, and the radial position and size of the annular magnet between the inner ring of the iron core and the outer ring of the iron core can determine the magnetic field strength of the entire iron core assembly; 2. By changing the radial position and size of the annular magnet between the inner ring and the outer ring of the core, the water pump with different torque requirements can be met, so that a large number of molds are not required for such water pumps, which can greatly reduce the mold cost and production cost of the water pump; 3. The main factors that determine the magnetic field strength of the electromagnetic coil are the size of the annular magnet and its position relative to the inner and outer rings of the core. The design, adjustment and production of the magnetic field strength of the electromagnetic coil are simpler. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Attached Figure 1 It is a schematic diagram of the cross-section structure of an electromagnetic clutch speed regulating water pump (Example 1); Attached Figure 2 It is a schematic diagram of the explosion of the iron core assembly and the magnetic circuit baffle plate structure; Attached Figure 3 This is a schematic diagram of the explosion of the suction cup assembly; Attached Figure 4 A schematic diagram of the magnetic circuit distribution of an electromagnetic coil applied to an electromagnetic clutch speed regulating water pump structure (Example 1); Attached Figure 5 It is a schematic diagram of an electromagnetic coil applied to an electromagnetic clutch speed regulating water pump structure (Example 2); Attached Figure 6 It is a schematic diagram of an electromagnetic coil applied to an electromagnetic clutch speed regulating water pump structure (Example 3); Attached Figure 7 It is a schematic diagram of an electromagnetic coil applied to an electromagnetic clutch speed regulating water pump structure (Example 4); Among them: 1. Coil; 2. Iron core assembly; 21. Iron core inner ring; 22. Iron core outer ring; 23. Ring-shaped magnet; 3. Magnetic circuit blocking plate; 4. Pump body; 5. Shaft; 6. Pulley; 7. Suction cup assembly; 71. Suction cup inner ring; 72. Ring; 73. Suction cup outer ring; 8. Driven disc; 81. Magnetic driven disc; 82. Inductive driven disc; 821. Iron sheet; 83. Blocking sleeve; 9. Inductive magnet. DETAILED DESCRIPTION

[0024] Embodiment 1: As shown in the attached Figure 1-4 As shown, an electromagnetic clutch speed regulating water pump comprises a pump body 4, a shaft 5 rotatably arranged in the pump body 4, a pulley 6 rotatably sleeved on the pump body 4, and a driven plate 8 fixed to the end of the shaft 5.

[0025] The electromagnetic clutch speed regulating water pump also includes an electromagnetic coil, which is located in the cavity of the pulley 6 and fixed to one end of the pump body 4. The electromagnetic coil includes an iron core component 2 and a coil 1 wound in the iron core component 2. Figure 2 As shown, the core assembly 2 includes an inner core ring 21, an outer core ring 22, and an annular magnet 23 sandwiched between the bottom ends of the inner core ring 21 and the outer core ring 22. A space for winding the coil 1 is formed between the inner core ring 21, the annular magnet 23 and the outer core ring 22. The annular magnet 23 is radially magnetized with the center of the circle as the reference to form an outer ring and an inner ring with one being an N pole and the other being an S pole. In this embodiment, the annular magnet 23 is a closed magnetic ring composed of a plurality of sector-shaped magnets.

[0026] The electromagnetic coil also includes a magnetic circuit blocking plate 3 fixed to the bottom of the core assembly 2 and made of non-magnetic material, such as copper, aluminum or stainless steel. In this embodiment, an aluminum blocking plate is used to block the magnetic circuit from forming a short circuit through other ferrous materials to a greater extent, thereby preventing magnetic leakage. The outer edge of the magnetic circuit blocking plate 3 is flush with the outer edge of the core outer ring 22, and a space for placing the coil 1 of the electromagnetic coil is formed between the magnetic circuit blocking plate 3 and the suction cup assembly 7. The bottom of the core inner ring 21 has a clamping bottom ring extending radially. The annular magnet 23 is clamped between the bottom of the core inner ring 21 and the core outer ring 22 by a clamping bottom ring. The clamping bottom ring is fixed to the magnetic circuit blocking plate 3 by screws. The magnetic circuit blocking plate 3 is provided with an installation stop. In this embodiment, the core inner ring 21 is positioned by the stop and locked on the magnetic circuit blocking plate 3 with a countersunk screw. A circle of fan-shaped magnets with the same polarity is adsorbed on the side of the core inner ring 21 and then installed in the core outer ring 22. In this embodiment, the fan-shaped magnet of the annular magnet 23 is close to the core outer ring 22.

[0027] The electromagnetic clutch speed regulating water pump also includes a suction cup assembly 7 which is sleeved on the shaft 5 and locked with the pulley 6. The suction cup assembly 7 is located between the driven disc 8 and the electromagnetic coil, and includes a suction cup outer ring 73 fixed on the pulley 6 and corresponding to the position of the iron core outer ring 22, a suction cup inner ring 71 corresponding to the position of the iron core inner ring 21, and a magnetic circuit blocking ring 72 made of non-magnetic material sandwiched between the suction cup outer ring 73 and the suction cup inner ring 71, which can change the magnetic circuit to avoid short circuit of magnetic lines of force. The annular magnet 23 and The suction cup assembly 7 is located on opposite sides of the coil 1, and the driven disk 8 includes a magnetic driven disk 81. The magnetic driven disk 81 faces the suction cup assembly 7. When the coil 1 is energized, the magnetic force of the annular magnet 23 offsets the electromagnetic force generated when the coil 1 is energized, and the magnetic driven disk 81 is disengaged from the suction cup assembly 7. When the coil 1 is de-energized, the magnetic circuit of the annular magnet 23 passes through the suction cup assembly 7 and the magnetic driven disk 81 to form a closed loop, so that the magnetic driven disk 81 engages with the suction cup assembly 7.

[0028] The driven disk 8 also includes an induction driven disk 82 . An induction magnet 9 is fixed on an outer edge of the pulley 6 . An iron sheet 821 for cutting the magnetic field lines of the induction magnet 9 is provided on the outer edge of the induction driven disk 82 .

[0029] The driven disk 8 also includes a barrier sleeve 83 made of non-magnetic material and fixedly mounted on the end of the shaft 5. The inductive driven disk 82 and the magnetic driven disk 81 are fixed on the outer end of the barrier sleeve 83, and the bottom end of the barrier sleeve 83 extends into the bottom of the coil 1 hole.

[0030] The suction cup inner ring 71 is sleeved on the blocking sleeve 83 with a gap, and the magnetic circuit blocking ring 72 is interference fit between the suction cup inner ring 71 and the suction cup outer ring 73 .

[0031] By adjusting the height and inner and outer diameters of the sector magnet, the magnetic field strength of the entire magnetic circuit can be changed, thereby meeting the needs of water pumps with different torque requirements. In addition, the sector magnet can be installed close to the inner ring of the core, in the middle of the inner and outer rings, or close to the inner ring of the core. The effects are similar and can be changed accordingly based on the arrangement of the electromagnetic coil.

[0032] Embodiment 2: As shown in the attached Figure 5 As shown, in this embodiment, the sector magnet is also close to the outer ring of the iron core, but its height is increased, and its magnetic field strength is greater than that of the first embodiment, which is suitable for water pumps with large torque requirements.

[0033] Embodiment 3: As shown in the attached Figure 6 As shown, in this embodiment, the installation position of the sector magnet is in the middle of the outer ring of the core and the inner ring of the core, and its magnetic field strength is slightly smaller than that of the first embodiment.

[0034] Embodiment 4: As shown in the attached Figure 7 As shown, in this embodiment, the sector magnet is close to the inner ring of the iron core, and its magnetic field strength is minimal, which is suitable for water pumps with small torque requirements.

[0035] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with the technology to understand the content of the present invention and implement it accordingly, and they cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. An electromagnetic coil, comprising an iron core component (2), and a coil (1) wound inside the iron core component (2), wherein the iron core component (2) comprises an iron core inner ring (21) and an iron core outer ring (22), characterized in that: The core assembly (2) further comprises a circular ring-shaped magnet (23) sandwiched between the bottom ends of the core inner ring (21) and the core outer ring (22), and a space for winding the coil (1) is formed between the core inner ring (21), the circular ring-shaped magnet (23) and the core outer ring (22).

2. The electromagnetic coil according to claim 1, characterized in that: The annular magnet (23) is radially magnetized with the center of the circle as a reference, so that one of the outer ring and the inner ring is an N pole and the other is an S pole.

3. The electromagnetic coil according to claim 1, characterized in that: The annular magnet (23) is a closed magnetic ring composed of a plurality of sector-shaped magnets assembled together, or is an integrally formed closed magnetic ring.

4. The electromagnetic coil according to claim 1, characterized in that: The electromagnetic coil also includes a magnetic path blocking plate (3) made of non-magnetic material and fixed to the bottom of the iron core assembly (2), the outer edge of the magnetic path blocking plate (3) being flush with or extending out from the outer edge of the iron core outer ring (22).

5. The electromagnetic coil according to claim 4, characterized in that: At least one of the iron core inner ring (21) and the iron core outer ring (22) is fixedly mounted on the magnetic path blocking plate (3) by means of screws.

6. The electromagnetic coil according to claim 5, characterized in that: The bottom of at least one of the core inner ring (21) and the core outer ring (22) has a clamping bottom ring extending radially, the annular magnet (23) is clamped between the bottoms of the core inner ring (21) and the core outer ring (22) by the clamping bottom ring, and the clamping bottom ring is fixed to the magnetic path blocking plate (3) by screws.

7. An electromagnetic clutch speed regulating water pump using the electromagnetic coil according to any one of claims 1 to 6, characterized in that: The pump comprises a pump body (4), a shaft (5) rotatably arranged in the pump body (4), a pulley (6) rotatably sleeved on the pump body (4), and a driven plate (8) fixed to the end of the shaft (5); the electromagnetic coil is located in the cavity of the pulley (6) and fixed to one end of the pump body (4); the magnetic force direction of the annular magnet (23) is opposite to the magnetic force direction of the electromagnetic force generated when the coil (1) is energized. It also includes a suction cup assembly (7) which is loosely sleeved on the shaft (5) and locked with the pulley (6); the suction cup assembly (7) is located between the driven disc (8) and the electromagnetic coil, and includes a suction cup outer ring (73) fixed on the pulley (6) and corresponding in position to the iron core outer ring (22); a suction cup inner ring (71) corresponding in position to the iron core inner ring (21); and a magnetic path blocking ring (72) made of non-magnetic material and sandwiched between the suction cup outer ring (73) and the suction cup inner ring (71); the annular magnet (23) and the suction cup assembly (7) are respectively located on opposite sides of the coil (1); the driven disc (8) includes a magnetic driven disc (81); the magnetic driven disc (81) faces the suction cup assembly (7); When the coil (1) is energized, the magnetic force of the annular magnet (23) cancels out the electromagnetic force generated when the coil (1) is energized, and the magnetic driven disk (81) is disengaged from the suction cup assembly (7). When the coil (1) is de-energized, the magnetic circuit of the annular magnet (23) passes through the suction cup assembly (7) and the magnetic driven disk (81) to form a closed loop, thereby causing the magnetic driven disk (81) to engage with the suction cup assembly (7).

8. The electromagnetic clutch speed regulating water pump according to claim 7, characterized in that: The driven disk (8) further comprises an induction driven disk (82), an induction magnet (9) is fixed on a circle of the outer edge of the pulley (6), and an iron sheet (821) for cutting the magnetic lines of force of the induction magnet (9) is provided on the outer edge of the induction driven disk (82).

9. The electromagnetic clutch speed regulating water pump according to claim 8, characterized in that: The driven disk (8) further comprises a barrier sleeve (83) made of a non-magnetic material and sleeved and fixed on the end of the shaft (5); the inductive driven disk (82) and the magnetic driven disk (81) are fixed on the outer end of the barrier sleeve (83); and the bottom end of the barrier sleeve (83) extends into the bottom of the hole of the coil (1).

10. The electromagnetic clutch speed regulating water pump according to claim 8, characterized in that: The suction cup inner ring (71) is sleeved on the barrier sleeve (83) with a gap, and the magnetic circuit barrier ring (72) is interference-fitted between the suction cup inner ring (71) and the suction cup outer ring (73).

Images