An impeller rotor assembly made of plastic

Abstract

The present invention discloses an impeller rotor assembly with a plastic structure, which relates to the technical field of water pumps. The impeller body is composed of an impeller upper half and an impeller body. The impeller body is formed by ultrasonic welding the impeller upper half and the impeller body. The impeller body is injection-molded as a whole. The shaft tube and the motor rotor in the impeller body are embedded in the impeller body during injection molding. After welding, the motor rotor is press-fitted with two upper and lower graphite bearings. The upper and lower graphite bearings are identical. The shaft tube in the impeller body is a centrally symmetrical structure. A balancing hole is provided on the impeller body for balancing the water pressure between the inside and outside of the impeller body. The plastic structure impeller rotor assembly provided by the present invention adopts an integrated structure, which has a simple structure and is easy to assemble. It relatively saves production and manufacturing costs, and can effectively balance the uneven water pressure inside and outside the impeller. It can be widely used in products of cooling systems.

Description

Technical Field

[0001] The present invention relates to the technical field of water pumps, and in particular to an impeller rotor assembly with a plastic structure. Background Art

[0002] The impeller rotor assembly is a key component of the electronic water pump in the cooling system. The cavity structure of each impeller rotor assembly directly affects the performance of the entire water pump.

[0003] The impeller rotor assemblies in the electronic water pumps currently on the market mostly use an impeller body, rotor assembly, and shaft tube installation structure, which is troublesome to assemble and difficult to control the relative spacing and fit. There are many parts and the structure is complex, which requires high production and manufacturing costs. In addition, when the electronic water pump is running, it is easy to have uneven water pressure between the upper and lower parts. Summary of the Invention

[0004] The purpose of the present invention is to solve the above problems and to propose an impeller rotor assembly with a plastic structure.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A plastic structure impeller rotor assembly includes an impeller upper half and an impeller body to form an impeller body, the impeller body is formed by ultrasonic welding the impeller upper half and the impeller body, the impeller body is integrally injection molded, the shaft tube and motor rotor in the impeller body are pre-embedded in the impeller body injection molding during injection molding, and the motor rotor is press-fitted with two upper and lower graphite bearings after welding is completed. The upper and lower graphite bearings are identical, and the shaft tube in the impeller body is a centrally symmetrical structure.

[0007] Optionally, the impeller body is divided into seven independent flow channels by seven independent blades, and the seven flow channels are evenly distributed.

[0008] Optionally, welding ribs and a first positioning structure are welded on the injection-molded impeller body, the welding ribs are located at both ends of the first positioning structure, and the upper half of the impeller is provided with a recessed structure and a second positioning structure.

[0009] Optionally, the shaft tube is a centrally symmetrical structure.

[0010] Optionally, a balancing hole is provided on the impeller body for balancing the water pressure between the inside and outside of the impeller body.

[0011] Optionally, there are multiple balancing holes and they are arranged at equal distances. A top block is provided in each balancing hole. The inner diameter of the balancing hole increases from top to bottom. When the top block moves downward, a gap appears between the top block and the balancing hole, and the gap is increased to balance the water pressure on the upper and lower sides.

[0012] The impeller body is also provided with a pressure measuring hole, the inner diameter of which is larger than the balancing hole. A pressure-sensitive triggering member is provided in the pressure measuring hole, and the pressure-sensitive triggering member drives all driving top blocks to move through the transmission mechanism under the action of pressure.

[0013] Optionally, the pressure-sensitive triggering member includes a moving block, a first spring, a piston cylinder, a first rod, a first permanent magnet, a silicon steel sheet, a second permanent magnet, a second rod and a second spring;

[0014] The transmission mechanism includes a first connecting rod, a sliding rod, a second connecting rod, a cavity and a pad;

[0015] The piston cylinder is fixedly arranged in the pressure measuring hole, the first rod body and the second rod body are symmetrically axially slidably connected to the two sides of the piston cylinder, the first rod body and the second rod body are respectively sleeved with a first spring and a second spring, the first rod body is close to the top and fixedly connected to the moving block, and the second rod body is close to the bottom and connected to the first connecting rod shaft;

[0016] A first permanent magnet and a second permanent magnet are fixedly mounted on opposite sides of the first rod and the second rod, respectively. The polarities of the opposite sides of the first permanent magnet and the second permanent magnet are the same, and a silicon steel sheet is disposed between the two.

[0017] The pad is integrally formed and arranged on the impeller body injection molding. A cavity is opened in the pad, and a plurality of through holes are arranged downward in the cavity. A sliding rod is arranged in the cavity. One end of the sliding rod is connected to the first connecting rod shaft, and the other end of the sliding rod is connected to the top block shaft through a plurality of second connecting rods.

[0018] Optionally, the cavity is connected to a limiting groove, a limiting block is slidably connected in the limiting groove, and the limiting block is fixedly connected to the sliding rod.

[0019] Compared with the prior art, the present invention has the following advantages:

[0020] The plastic structure impeller rotor assembly provided by the present invention adopts an integrated structure, which is simple in structure and easy to assemble, which relatively saves production costs and can effectively balance the uneven water pressure inside and outside the impeller. It can be widely used in cooling system products.

[0021] The present invention further arranges a top block and a pressure-sensitive triggering component cooperating therewith in the balancing hole, so that the balancing hole is closed under normal conditions. Only when the pressure increases and the pressure lasts for a period of time until the silicon steel sheet is magnetized will the balancing hole be driven to open, thereby avoiding normal connection causing liquid movement disorder and short-term pressurization causing connection. Connection will only occur after a long period of pressurization. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic diagram of the structure of a plastic structure impeller rotor assembly is provided;

[0023] Figure 2 This is a central cross-sectional view of a plastic structure impeller rotor assembly of the present invention;

[0024] Figure 3 A schematic diagram of an impeller body of an impeller rotor assembly having a plastic structure according to the present invention;

[0025] Figure 4 A schematic diagram of an impeller body of an impeller rotor assembly having a plastic structure according to the present invention;

[0026] Figure 5 A schematic diagram of the upper half of an impeller of a plastic structure impeller rotor assembly according to the present invention;

[0027] Figure 6 This is a schematic diagram of the arrangement of the balancing holes in the second embodiment of the present invention;

[0028] Figure 7 This is a schematic diagram of a transmission mechanism according to a second embodiment of the present invention;

[0029] Figure 8 Schematic diagram of a pressure-sensitive triggering element according to a second embodiment of the present invention.

[0030] In the figure: 1 impeller upper half, 11 recessed structure, 12 second positioning structure, 2 impeller body, 21 impeller body injection molding, 211 balancing hole, 212 welding rib, 213 first positioning structure, 22 shaft tube, 23 motor rotor, 3 graphite bearing, 4 impeller body, 5 pressure trigger, 51 moving block, 52 first spring, 53 piston cylinder, 54 first rod body, 55 first permanent magnet, 56 silicon steel sheet, 57 second permanent magnet, 58 second rod body, 59 second spring, 61 first connecting rod, 62 sliding rod, 63 second connecting rod, 64 top block, 65 cavity, 66 pad, 7 limit groove, 8 limit block, 9 pressure measuring hole. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0032] Example 1

[0033] Reference Figure 1-5A plastic impeller rotor assembly includes an impeller upper half 1 and an impeller body 2 to form an impeller body 4. The impeller body 4 is formed by ultrasonic welding the impeller upper half 1 and the impeller body 2. The impeller body 2 is integrally injection molded. The shaft tube 22 and the motor rotor 23 in the impeller body 2 are embedded in the impeller body injection molding 21 during injection molding. After welding, the motor rotor 23 is press-fitted with two upper and lower graphite bearings 3. The upper and lower graphite bearings 3 are identical. The shaft tube 22 in the impeller body 2 is a centrally symmetrical structure. The impeller body 4 is divided into seven independent flow channels by seven independent blades, and the seven flow channels are evenly distributed. Welding ribs 212 and a first positioning structure 213 are welded on the impeller body injection molding 21. The welding ribs 212 are located at both ends of the positioning structure 213. The upper half 1 of the impeller is provided with a recessed structure 11 and a second positioning structure 12. The shaft tube 22 is a centrally symmetrical structure. The number of graphite bearings 3 is one piece each on the upper and lower parts. The graphite bearings 3 are identical to prevent misassembly during assembly. The motor rotor 23 is an unmagnetized bonded neodymium iron boron magnet.

[0034] Unlike conventional cylindrical graphite bearings, the present invention adopts a T-shaped graphite bearing 3 . When the graphite bearing 3 is press-fitted, a T-shaped step is provided to limit the position, which can effectively ensure that the product is assembled to the set position.

[0035] The welding ribs 212 provided on the impeller body 2 are triangular structures. When welded together with the impeller upper half 1, the overflow generated by welding will be collected in the recessed structure 11 of the impeller upper half 1, which can effectively prevent the overflow from flowing out and affecting the cleanliness of the product.

[0036] The pressure balancing hole 213 provided in the impeller body 2 can be used to adjust the pressure when the water pressure in the inner and outer cavities of the impeller body 4 is uneven when the impeller is running at high speed.

[0037] Example 2

[0038] Reference Figure 6-Figure 8 There are multiple balancing holes 211, spaced evenly apart. Each balancing hole 211 is fitted with a push block 64. The inner diameter of the balancing hole 211 increases from top to bottom. As the push block 64 moves downward, a gap forms between the push block 64 and the balancing hole 211, increasing the pressure balance between the upper and lower sides. The impeller body 2 is also provided with a pressure measuring hole 9, the inner diameter of which is larger than that of the balancing hole 211. A pressure-sensing trigger 5 is located within the pressure measuring hole. Under the action of pressure, the pressure-sensing trigger 5 drives all the driving push blocks 64 to move via a transmission mechanism. The details are as follows:

[0039] The pressure-sensitive trigger 5 includes a moving block 51, a first spring 52, a piston cylinder 53, a first rod 54, a first permanent magnet 55, a silicon steel sheet 56, a second permanent magnet 57, a second rod 58, and a second spring 59. The transmission mechanism includes a first connecting rod 61, a sliding rod 62, a second connecting rod 63, a cavity 65, and a spacer 66.

[0040] The piston cylinder 53 is fixedly arranged in the pressure measuring hole 9, and the first rod body 54 and the second rod body 58 are symmetrically axially slidably connected on both sides of the piston cylinder 53. The first rod body 54 and the second rod body 58 are respectively covered with a first spring 52 and a second spring 59. The first rod body 54 is close to the top and fixedly connected to the moving block 51, and the second rod body 58 is close to the bottom and axially connected to the first connecting rod 61.

[0041] A first permanent magnet 55 and a second permanent magnet 57 are fixedly mounted on opposite sides of the first rod 54 and the second rod 58 , respectively. The polarities of the opposite sides of the first permanent magnet 55 and the second permanent magnet 57 are the same, and a silicon steel sheet 56 is disposed between the two.

[0042] The pad 66 is integrally formed and arranged on the impeller body injection molding 21. A cavity 65 is opened in the pad 66, and a plurality of through holes are arranged downwardly in the cavity 65. A slide rod 62 is arranged in the cavity 65. One end of the slide rod 62 is connected to the first connecting rod 61 axis, and the other end of the slide rod 62 is connected to the top block 64 axis through a plurality of second connecting rods 63.

[0043] The cavity 65 is connected to the limiting groove 7, and the limiting block 8 is slidably connected in the limiting groove 7. The limiting block 8 is fixedly connected to the slide rod 62. The setting of the limiting groove 7 and the limiting block 8 plays a limiting role, avoiding the dislocation movement of the slide rod 62 and making it only move in a straight line.

[0044] When the water pressure on the upper side increases significantly until it overcomes the elastic force of the first spring 52, the moving block 51 drives the first permanent magnet 55 to move downward and stick to the silicon steel sheet 56. The silicon steel sheet 56 will be magnetized under the action of the upper magnetic force (assuming that the downward side of the first permanent magnet 55 is N-level, then the downward side of the silicon steel sheet 56 after magnetization is also N-level). The second permanent magnet 57 has the same polarity as the side opposite to the first permanent magnet 55 (therefore, the upward side of the second permanent magnet 55 is also N-level). Under the repulsion of the silicon steel sheet 56, it finally overcomes the elastic force of the second spring 59 and moves downward.

[0045] The second permanent magnet 55 pushes the slide rod 7 to slide through the first connecting rod 61. After the slide rod 7 slides, it pushes the top block 64 to move inward through the second connecting rod 63 until the balance hole 211 leaks a gap to balance the upper and lower air pressures. The advantage of this embodiment over the first embodiment is that the balance hole 211 is closed under normal conditions. Only when the pressure increases and the pressure lasts for a period of time until the silicon steel sheet 56 is magnetized will the balance hole 211 be driven to open, avoiding normal connection causing liquid movement disorder, and also avoiding short-term pressurization causing connection. Connection will only occur after a long period of pressurization.

[0046] The above description is only a preferred specific embodiment of the present invention. It is impossible to list all the embodiments here, but the protection scope of the present invention is not limited to this. Any technician familiar with this technical field can make equivalent replacements or changes based on the technical solutions and inventive concepts of the present invention within the technical scope disclosed by the present invention, and they should be covered by the protection scope of the present invention.

Claims

1. An impeller rotor assembly of a plastic structure, characterized in that: The impeller body (4) is composed of an impeller upper half (1) and an impeller body (2), wherein the impeller body (4) is formed by ultrasonic welding the impeller upper half (1) and the impeller body (2), and the impeller body (2) is integrally injection-molded. The shaft tube (22) and the motor rotor (23) in the impeller body (2) are pre-embedded in the impeller body injection molding (21) during injection molding. After welding, the motor rotor (23) is press-fitted with two upper and lower graphite bearings (3), wherein the upper and lower graphite bearings (3) are identical, and the shaft tube (22) in the impeller body (2) is a centrally symmetrical structure. The impeller body (2) is provided with a balancing hole (211) for balancing the water pressure inside and outside the impeller body (4). The balancing holes (211) are multiple and are arranged at equal distances. A top block (64) is provided in each balancing hole (211). The inner diameter of the balancing hole (211) increases from top to bottom. When the top block (64) moves downward, a gap appears between the top block (64) and the balancing hole (211), and the gap is increased to balance the water pressure on the upper and lower sides. The impeller body (2) is also provided with a pressure measuring hole (9), the inner diameter of which is larger than the balancing hole (211), and a pressure-sensing triggering member (5) is provided in the pressure measuring hole. Under the action of pressure, the pressure-sensing triggering member (5) drives all the driving top blocks (64) to move through a transmission mechanism.

2. The impeller rotor assembly of a plastic structure according to claim 1, characterized in that: The impeller body (4) is divided into seven independent flow channels by seven independent blades, and the seven flow channels are evenly distributed.

3. The impeller rotor assembly of a plastic structure according to claim 1, characterized in that: The impeller body injection molding (21) is welded with welding ribs (212) and a first positioning structure (213), the welding ribs (212) are located at both ends of the first positioning structure (213), and the impeller upper half (1) is provided with a recessed structure (11) and a second positioning structure (12).

4. The impeller rotor assembly of a plastic structure according to claim 1, characterized in that: The shaft tube (22) is a centrally symmetrical structure.

5. The impeller rotor assembly of a plastic structure according to claim 1, characterized in that: The pressure-sensitive triggering member (5) comprises a moving block (51), a first spring (52), a piston cylinder (53), a first rod (54), a first permanent magnet (55), a silicon steel sheet (56), a second permanent magnet (57), a second rod (58) and a second spring (59); The transmission mechanism comprises a first connecting rod (61), a sliding rod (62), a second connecting rod (63), a cavity (65) and a cushion block (66); The piston cylinder (53) is fixedly arranged in the pressure measuring hole (9), the first rod body (54) and the second rod body (58) are symmetrically axially slidably connected to the two sides of the piston cylinder (53), the first rod body (54) and the second rod body (58) are respectively covered with a first spring (52) and a second spring (59), the first rod body (54) is close to the top and fixedly connected to the moving block (51), and the second rod body (58) is close to the bottom and axially connected to the first connecting rod (61); A first permanent magnet (55) and a second permanent magnet (57) are fixedly disposed on opposite sides of the first rod (54) and the second rod (58), respectively. The opposite sides of the first permanent magnet (55) and the second permanent magnet (57) have the same polarity, and a silicon steel sheet (56) is disposed between the two. The pad (66) is integrally formed and arranged on the impeller body injection molding (21), a cavity (65) is opened in the pad (66), and a plurality of through holes are arranged downwardly in the cavity (65), a sliding rod (62) is arranged in the cavity (65), one end of the sliding rod (62) is connected to the first connecting rod (61) axis, and the other end of the sliding rod (62) is connected to the top block (64) axis through a plurality of second connecting rods (63).

6. The impeller rotor assembly of a plastic structure according to claim 5, characterized in that: The cavity (65) is connected to a limiting groove (7), a limiting block (8) is slidably connected in the limiting groove (7), and the limiting block (8) is fixedly connected to the sliding rod (62).

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