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] This utility model relates to an electromagnetic coil and an electromagnetic clutch speed-regulating water pump. Background Technology

[0002] In the existing technology, automobile engines widely use water pump structures to provide coolant to prevent overheating and burnout.

[0003] When the temperature is normal, the water pump only needs to cool the engine with low speed and small flow rate of coolant. When the engine temperature is high, the water pump needs to cool the engine with high speed and large flow rate. Therefore, the water pump needs to be able to switch between high and low speeds and between large and small flow rates to cool the engine with water. This achieves energy saving and emission reduction, making it more environmentally friendly.

[0004] Existing electromagnetic speed-regulating water pumps, such as the power-off engagement type electromagnetic energy-saving water pump described in patent number CN214741627U, include a pump body, an iron core sleeved on the pump body, a drive wheel, and a magnetic induction mechanism fixed on the shaft bearing. The magnetic induction mechanism includes a driven disc, a magnet fixing disc, and a spring plate connected between the magnet fixing disc and the driven disc.

[0005] The iron core has a coil fixed inside by potting glue to form a conventional electromagnetic coil. When the coil is energized, it generates electromagnetic force; when the coil is de-energized, there is no electromagnetic force.

[0006] A through-hole magnetic leakage groove is opened on the end wall of the drive wheel facing the coil. A permanent magnet is fixed in the magnetic leakage groove. The electromagnetic force generated by the electromagnetic coil being energized cancels the magnetic force of the permanent magnet, and the driven plate is disengaged from the drive wheel. The water pump cools the engine with low speed and small flow of cooling water. However, since the permanent magnet is mounted on the drive wheel, it is necessary to open the magnetic leakage groove on the drive wheel and set up the corresponding structure. When the water pump needs multiple torque requirements, it is necessary to redesign the structure and open the mold separately for each torque requirement.

[0007] Generally speaking, the cost of a simple mold opening may be between several thousand and tens of thousands of yuan, while the cost of a complex mold opening may reach hundreds of thousands or even millions of yuan, resulting in higher production costs.

[0008] Therefore, it is necessary to provide a water pump that has magnetic force even when the electromagnetic coil is not energized, and whose magnetic force strength can be easily designed and adjusted to meet different torque requirements. Applying this technology to water pumps can greatly reduce the mold opening cost and production cost of water pumps, which is very necessary. Utility Model Content

[0009] The technical problem to be solved by this utility model is to provide an electromagnetic coil.

[0010] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: an electromagnetic coil, including an iron core assembly and a coil wound in the iron core assembly. The iron core assembly includes an inner iron core ring and an outer iron core ring. The iron core assembly also includes a ring-shaped magnet sandwiched between the bottom ends of the inner iron core ring and the outer iron core ring. The inner iron core ring, the ring-shaped magnet, and the outer iron core ring form a space for winding the coil.

[0011] In some embodiments, the annular magnet is radially magnetized with respect to the center to form an outer ring and an inner ring, one of which is the N pole and the other is the S pole.

[0012] In some embodiments, the annular magnet is a closed magnetic ring assembled from multiple sector magnets, or a one-piece closed magnetic ring.

[0013] In some embodiments, the electromagnetic coil further includes a magnetic circuit barrier plate made of non-magnetic material fixed to the bottom of the core assembly, the outer edge of the magnetic circuit barrier plate being flush with or extending beyond the outer edge of the outer ring of the core.

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

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

[0016] Another technical problem to be solved by this utility model is to provide an electromagnetic clutch speed-regulating water pump.

[0017] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: an electromagnetic clutch speed-regulating water pump using an electromagnetic coil as described in any one of the above embodiments, comprising a pump body, a shaft rotatably disposed within the pump body, a pulley rotatably sleeved on the pump body, and a driven disc fixed to the end of the shaft. The electromagnetic coil is located within the cavity of the pulley and fixed to 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. The pump body also includes a suction cup assembly gapped and sleeved on the shaft and locked to the pulley. The suction cup assembly is located between the driven disc and the electromagnetic coil, and includes components fixed to the pulley and positioned corresponding to the driven disc. The coil comprises an outer ring of a suction cup corresponding to the outer ring of the iron core, an inner ring of a suction cup positioned corresponding to the inner ring of the iron core, and a magnetic circuit blocking ring made of non-magnetic material sandwiched between the outer and inner rings of the suction cup. The annular magnet and the suction cup assembly are located on opposite sides of the coil. The driven disk includes a magnetically driven disk facing the suction cup assembly. When the coil is energized, the magnetic force of the annular magnet cancels out the electromagnetic force generated when the coil is energized, and the magnetically driven disk disengages from the suction cup assembly. When the coil is de-energized, the magnetic circuit of the annular magnet forms a closed loop through the suction cup assembly and the magnetically driven disk, thereby engaging the magnetically driven disk with the suction cup assembly.

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

[0019] In some embodiments, the driven disk further includes a barrier sleeve made of non-magnetic material that is fitted and fixed to the end of the shaft. The inductive driven disk and the magnetic driven disk are fixed to 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 gapped onto the barrier sleeve, and the magnetic circuit barrier ring is interference-fitted between the inner ring of the suction cup and the outer ring of the suction cup.

[0021] The scope of this utility model is not limited to technical solutions formed by specific combinations of the above-mentioned technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-mentioned technical features or their equivalent features. For example, technical solutions formed by substituting the above-mentioned features with (but not limited to) technical features with similar functions disclosed in this application.

[0022] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art:

[0023] 1. This utility model provides an electromagnetic coil and an electromagnetic clutch speed-regulating water pump. When the electromagnetic coil is not energized, a magnetic field is generated between the inner and outer rings of the iron core. The radial position and size of the annular magnet between the inner and outer rings of the iron core determine the magnetic field strength of the entire iron core assembly.

[0024] 2. Water pumps with different torque requirements can be made by changing the radial position and size of the annular magnet between the inner and outer rings of the iron core. This eliminates the need for extensive mold making for such water pumps, thus greatly reducing mold making and production costs.

[0025] 3. The main factors determining the magnetic field strength of an electromagnetic coil are the size of the ring magnet and its position relative to the inner and outer rings of the iron core. The design, adjustment, and fabrication of the magnetic field strength of the electromagnetic coil are relatively simple. Attached Figure Description

[0026] Appendix Figure 1 This is a cross-sectional schematic diagram of an electromagnetic clutch speed-regulating water pump (Example 1).

[0027] Appendix Figure 2 An exploded view of the core assembly and magnetic circuit barrier structure;

[0028] Appendix Figure 3 This is a schematic diagram of the suction cup assembly exploding.

[0029] Appendix Figure 4 A schematic diagram of the magnetic circuit distribution of the electromagnetic coil used in an electromagnetic clutch speed-regulating water pump (Example 1).

[0030] Appendix Figure 5 This is a schematic diagram of an electromagnetic coil applied to an electromagnetic clutch speed-regulating water pump structure (Example 2).

[0031] Appendix Figure 6 This is a schematic diagram of an electromagnetic coil applied to an electromagnetic clutch speed-regulating water pump structure (Example 3).

[0032] Appendix Figure 7 This is a schematic diagram of an electromagnetic coil applied to an electromagnetic clutch speed-regulating water pump structure (Example 4).

[0033] The components are: 1. Coil; 2. Iron core assembly; 21. Inner ring of iron core; 22. Outer ring of iron core; 23. Circular magnet; 3. Magnetic circuit barrier plate; 4. Pump body; 5. Shaft; 6. Pulley; 7. Suction cup assembly; 71. Inner ring of suction cup; 72. Circular ring; 73. Outer ring of suction cup; 8. Driven plate; 81. Magnetic driven plate; 82. Induction driven plate; 821. Iron sheet; 83. Barrier sleeve; 9. Induction magnet. Detailed Implementation

[0034] Example 1: As shown in the attached document Figure 1-4As shown, an electromagnetic clutch speed-regulating water pump includes a pump body 4, a shaft 5 rotatably disposed within the pump body 4, a pulley 6 rotatably sleeved on the pump body 4, and a driven disc 8 fixed to the end of the shaft 5.

[0035] The electromagnetic clutch speed-regulating water pump also includes an electromagnetic coil, which is located inside the cavity of the pulley 6 and fixed to one end of the pump body 4. The electromagnetic coil includes an iron core assembly 2 and a coil 1 wound inside the iron core assembly 2. Figure 2 As shown, the core assembly 2 includes an inner core ring 21, an outer core ring 22, and a ring-shaped magnet 23 sandwiched between the bottom ends of the inner core ring 21 and the outer core ring 22. The inner core ring 21, the ring-shaped magnet 23, and the outer core ring 22 form a space for winding the coil 1. The ring-shaped magnet 23 is radially magnetized with the center as a reference to form one of the outer ring and the inner ring as the N pole and the other as the S pole. In this embodiment, the ring-shaped magnet 23 is a closed magnetic ring assembled from multiple fan-shaped magnets.

[0036] The electromagnetic coil also includes a magnetic circuit barrier plate 3 made of a non-magnetic material, such as copper, aluminum, or stainless steel, fixed to the bottom of the iron core assembly 2. In this embodiment, an aluminum barrier plate is used to better prevent short circuits in the magnetic circuit caused by other ferroic materials, thus preventing magnetic leakage. The outer edge of the magnetic circuit barrier plate 3 is flush with the outer edge of the outer ring 22 of the iron core. A space for placing the coil 1 of the electromagnetic coil is formed between the magnetic circuit barrier plate 3 and the suction cup assembly 7. The bottom of the inner ring 21 of the iron core has a clamping bottom ring extending radially. The annular magnet 23 is clamped between the bottom of the inner ring 21 and the outer ring 22 of the iron core by a clamping bottom ring. The clamping bottom ring is fixed to the magnetic circuit barrier plate 3 by screws. The magnetic circuit barrier plate 3 is provided with a mounting stop. In this embodiment, the inner ring 21 of the iron core is positioned by the stop and locked to the magnetic circuit barrier plate 3 with countersunk screws. A ring of sector magnets of the same polarity is attracted to the side of the inner ring 21 of the iron core and then installed into the outer ring 22 of the iron core. In this embodiment, the sector magnets of the annular magnet 23 are close to the outer ring 22 of the iron core.

[0037] The electromagnetic clutch speed-regulating water pump also includes a suction cup assembly 7, which is gap-fitted onto the shaft 5 and locked to the pulley 6. The suction cup assembly 7 is located between the driven disc 8 and the electromagnetic coil. It includes a suction cup outer ring 73 fixed to the pulley 6 and positioned corresponding to the outer ring 22 of the iron core, a suction cup inner ring 71 positioned corresponding to the inner ring 21 of the iron core, 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. This ring can change the magnetic circuit and prevent short circuits of magnetic lines of force. The ring-shaped magnet 23 and... The suction cup assemblies 7 are located on opposite sides of the coil 1. The driven disk 8 includes a magnetic driven disk 81, which 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 disengages from the suction cup assembly 7. When the coil 1 is de-energized, the magnetic circuit of the annular magnet 23 forms a closed loop through the suction cup assembly 7 and the magnetic driven disk 81, thereby engaging the magnetic driven disk 81 with the suction cup assembly 7.

[0038] The driven disk 8 also includes an induction driven disk 82, on which an induction magnet 9 is fixed on the outer edge of the pulley 6, and on the outer edge of the induction driven disk 82 there is an iron piece 821 for cutting the magnetic lines of force of the induction magnet 9.

[0039] The driven disk 8 also includes a barrier sleeve 83 made of non-magnetic material that is sleeved and fixed to the end of the shaft 5. The induction driven disk 82 and the magnetic driven disk 81 are fixed to 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.

[0040] The inner ring 71 of the suction cup is fitted onto the blocking sleeve 83 with a gap, and the magnetic circuit blocking ring 72 is interference-fitted between the inner ring 71 and the outer ring 73 of the suction cup.

[0041] Adjusting the height and inner / outer diameter of the sector magnet can change the magnetic field strength of the entire magnetic circuit, thereby meeting the requirements of water pumps with different torque requirements. In addition, the sector magnet can be installed close to the inner ring of the iron core, in the middle of the inner and outer rings, or close to the inner ring of the iron core, with similar effects. The installation position can be adjusted according to the arrangement of the electromagnetic coil.

[0042] Example 2: As shown in the attached document 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 in Embodiment 1, making it suitable for water pumps with high torque requirements.

[0043] Example 3: As shown in the attached document Figure 6 As shown, in this embodiment, the fan-shaped magnet is installed in the middle of the outer ring and the inner ring of the iron core, and its magnetic field strength is slightly less than that in Embodiment 1.

[0044] Example 4: As shown in the appendix 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 the smallest, which is suitable for water pumps with low torque requirements.

[0045] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. An electromagnetic coil, comprising a core assembly (2) and a coil (1) wound within the core assembly (2), wherein the core assembly (2) comprises an inner core ring (21) and an outer core ring (22), characterized in that: The core assembly (2) also includes an annular magnet (23) sandwiched between the bottom ends of the inner ring (21) and the outer ring (22) of the core, and the inner ring (21), the annular magnet (23) and the outer ring (22) of the core form a space for the coil (1) to be wound.

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

3. The electromagnetic coil according to claim 1, characterized in that: The circular magnet (23) is a closed magnetic ring assembled from multiple sector magnets, or a closed magnetic ring formed in one piece.

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

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

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

7. An electromagnetic clutch speed-regulating water pump employing the electromagnetic coil according to any one of claims 1-6, characterized in that: The system includes a pump body (4), a shaft (5) rotatably disposed within the pump body (4), a pulley (6) rotatably sleeved on the pump body (4), and a driven disc (8) fixed to the end of the shaft (5). The electromagnetic coil is located within the cavity of the pulley (6) and fixed to one end of the pump body (4). The magnetic direction of the annular magnet (23) is opposite to the magnetic direction of the electromagnetic force generated when the coil (1) is energized. It also includes a suction cup assembly (7) that is fitted onto the shaft (5) and locked to the pulley (6). The suction cup assembly (7) is located between the driven disk (8) and the electromagnetic coil. It includes a suction cup outer ring (73) fixed to the pulley (6) and positioned corresponding to the outer ring (22) of the iron core, a suction cup inner ring (71) positioned corresponding to the inner ring (21) of the iron core, 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). The ring-shaped magnet (23) and the suction cup assembly (7) are located on opposite sides of the coil (1). The driven disk (8) includes a magnetically attracted driven disk (81) facing 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) disengages from the suction cup assembly (7). When the coil (1) is de-energized, the magnetic circuit of the annular magnet (23) forms a closed loop through the suction cup assembly (7) and the magnetic driven disk (81), 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) also includes an induction driven disk (82), an induction magnet (9) is fixed on the outer edge of the pulley (6), and an iron piece (821) for cutting the magnetic lines of force of the induction magnet (9) is 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) also includes a barrier sleeve (83) made of non-magnetic material, which is sleeved and fixed to the end of the shaft (5). The induction driven disk (82) and the magnetic driven disk (81) are fixed to the outer end of the barrier sleeve (83). 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 inner ring (71) of the suction cup is fitted onto the barrier sleeve (83) with a gap, and the magnetic circuit barrier ring (72) is interference-fitted between the inner ring (71) of the suction cup and the outer ring (73) of the suction cup.

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