Anti-abrasion structure of water pump impeller

Abstract

The utility model discloses an anti-wear structure of a water pump impeller, which comprises an impeller magnet, an impeller, an impeller middle frame, an impeller magnet shaft and an anti-wear sheath, the impeller magnet and the impeller magnet shaft are integrated through injection molding, the impeller magnet and the impeller are connected through the impeller magnet shaft, and the impeller middle frame is arranged between the impeller magnet and the impeller. The shaft sleeve which is directly formed through injection molding is arranged in the center of the impeller middle frame, namely, the center hole, the anti-abrasion protection sleeve is placed in the shaft sleeve of the impeller middle frame, and the anti-abrasion protection sleeve is made of high-performance graphite, has the advantages of being high in hardness, good in abrasion resistance, good in impact resistance and resistant to corrosion and can effectively protect a bearing, the impeller and the like. Through the effective anti-abrasion structure, the water pump impeller is effectively prevented from being abraded, the service life is prolonged, and high lift and use efficiency of the water pump are maintained.

Description

Technical Field

[0001] The utility model belongs to the technical field of water pumps and relates to an anti-wear structure of a water pump impeller. Background Art

[0002] The working principle of the brushless magnetic water pump is that the motor drives the outer magnetic rotor of the magnetic water pump to connect with the inner magnetic rotor through the magnetic field and drive the impeller of the magnetic water pump to operate. When the magnetic water pump is filled with liquid, the impeller is driven by the high speed of the motor. During the rotation process, it continuously absorbs the liquid and discharges the absorbed liquid. The impeller makes the liquid rotate in the pump. With continuous work like this, the medium generates centrifugal force under the action of pressure and speed energy. In this way, under the action of centrifugal force, the liquid is thrown out from the center of the impeller to the surrounding along the impeller flow channel, and then discharged through the volute of the water pump. In this way, the medium is transported to the final destination.

[0003] Where there is rotation, there will be wear. Several typical reasons for the wear of the impeller of the brushless magnetic water pump are as follows: 1. The impeller of the magnetic pump is unbalanced or improperly installed, causing friction; 2. The pump shaft of the magnetic pump is bent; the pump shaft and the power machine shaft are not concentric, and the bearings or packing are worn too much, causing the impeller to shake and produce friction; 3. Affected by mud and water erosion, the impeller is worn into grooves or streaks; 4. Debris is sucked into the impeller and damaged; 5. Cavitation occurs, producing honeycomb-shaped holes.

[0004] Such impeller wear will bring a series of negative effects, such as reduced pump efficiency, increased noise, and subsequent burning of motors and bearings. On the one hand, it affects the efficiency of the pump, and the inevitable safety hazards caused by it cannot be ignored. There is an urgent need in the art for a structure that can effectively prevent the wear of pump impellers. Utility Model Content

[0005] In view of the shortcomings of the prior art, the utility model provides an anti-wear structure for a water pump impeller.

[0006] In order to solve the above technical problems, the specific technical solutions provided by the utility model are as follows:

[0007] A wear-resistant structure for a water pump impeller comprises an impeller magnet, an impeller, an impeller middle frame, an impeller magnet shaft and an anti-wear sleeve, wherein the impeller magnet shaft is arranged at the center position of the impeller magnet, the impeller magnet is nested in the bottom of the impeller middle frame through the impeller magnet shaft, the anti-wear sleeve is arranged in the center hole of the impeller middle frame, the impeller cover is closed on the top of the impeller middle frame, and the impeller is nested in the top end of the impeller magnet shaft.

[0008] Preferably, the anti-wear sleeve is a graphite sleeve, and the water pump is a brushless magnetic pump.

[0009] By adopting the above technical solution, the graphite sheath has the advantages of high hardness, strong impact resistance, corrosion resistance, and wear resistance. According to the characteristics of graphite, it has a certain self-repair ability for small abnormal wear, which can effectively ensure the normal operation of the impeller and prevent it from being worn too much during use, thereby preventing the impeller from shaking and generating friction, thereby effectively avoiding mutual wear between components.

[0010] Preferably, an axial through hole is provided in the central axis of the anti-wear sleeve, and the impeller magnet shaft is inserted into the anti-wear sleeve through the axial through hole, so that the impeller magnet is nested with the impeller middle frame.

[0011] Preferably, an anti-wear cover is coaxially embedded in the center of the bottom of the impeller, an anti-wear pad is coaxially embedded in the impeller magnet, and the upper and lower end surfaces of the anti-wear sleeve respectively cooperate with the anti-wear cover and the anti-wear pad to form two friction pairs.

[0012] By adopting the above technical scheme, the anti-wear sleeve is nested in the center of the impeller middle frame and runs through the entire middle frame. The upper and lower end surfaces of the anti-wear sleeve cooperate with the anti-wear cover on the bottom surface of the impeller and the anti-wear pad in the center of the impeller magnet to form two friction pairs. The upper and lower friction pairs can simultaneously provide anti-wear effects for the impeller and the impeller magnet, and the inner wall of the hole can also provide anti-wear effects for the outer wall of the impeller magnet shaft. A wear-resistant structure simultaneously meets the wear-resistant requirements of the upper and lower end surfaces and the center hole.

[0013] Preferably, a threaded hole is provided at the upper part of the axis of the impeller magnet shaft, and the threaded hole is used to pair with a screw; a positioning screw is provided at the center of the impeller, and the positioning screw is threaded and fixed in the threaded hole, so as to nest the impeller in the impeller magnet shaft and cover the impeller middle frame.

[0014] The adoption of the above technical solution is beneficial to the stability of the impeller relative to the impeller magnet axis and ensures that the anti-wear sleeve has a uniform anti-wear effect on the entire impeller.

[0015] Preferably, the end surface of the anti-wear sleeve is provided with a groove, and the groove is used to provide space in a contact friction state so that the coolant is distributed in the groove.

[0016] By adopting the above technical solution, the gap allows the coolant to be distributed in the groove, which can avoid long-term friction and high temperature damage to the friction pair.

[0017] Preferably, a shaft sleeve portion extending axially is provided in the center of the impeller middle frame, and the impeller magnet shaft and the anti-wear sleeve are both embedded in the shaft sleeve portion; the shaft sleeve portion is provided with a slot penetrating the impeller middle frame in the longitudinal direction, and the slot is close to the outer side of the center hole.

[0018] Preferably, holes are arranged on the top of the horizontal frame of the impeller middle frame, and the holes are distributed on the outside of the slots. The holes are used to form a closed flow field by cooperating with the pressure difference of the slots through the rotation of the impeller.

[0019] Preferably, the grooves are U-shaped grooves, which are distributed on the end surface of the anti-wear sleeve and are equally divided at an angle of 120 degrees.

[0020] Preferably, the cross-section of the notches is rectangular and is evenly distributed in the plane radial direction, with an angle of 120 degrees between adjacent notches.

[0021] Preferably, the holes are circular holes, which are evenly distributed in the plane radial direction, and there is an angle of 90 degrees between adjacent holes.

[0022] By adopting the above technical scheme, the three irregular square notches are evenly distributed on the periphery of the anti-wear sleeve, and the interval between the notches and the anti-wear sleeve is 1.5mm. Four circular holes are arranged on the periphery of the square notches at the same time. The circular holes cooperate with the square notches to form a closed flow field through the pressure difference of the rotating impeller, which is beneficial for the coolant to take away the heat generated by the friction of the anti-wear sleeve through the square notches. The circular holes cooperate with the square notches to form a closed flow field through the pressure difference of the rotating impeller, which is also convenient for the replacement of the coolant in the U-shaped groove. When the whole works, the coolant can circulate and efficiently take away the heat of the friction pair of the anti-wear sleeve, thereby extending the service life of the anti-wear sleeve.

[0023] By adopting the above technical solution, the shaft through hole is sleeved with the impeller, the impeller middle frame and the impeller magnet shaft on the impeller magnet, which can avoid the wear problem caused by the non-concentricity of the pump shaft and the power machine shaft.

[0024] The beneficial effects of the utility model: the anti-wear sleeve has the advantages of high hardness, strong wear resistance, strong impact resistance, corrosion resistance, and the anti-wear surface can be self-repaired. The overall impeller assembly can provide the anti-wear sleeve with a good heat dissipation structure; the anti-wear sleeve has good wear resistance, self-repair of minor scratches, and can work for a long time, which can effectively protect the bearings and prevent them from being worn too much during use, thereby causing the impeller to shake and produce friction, effectively avoiding mutual wear between the components; the shaft through hole is sleeved on the impeller, the impeller middle frame, and the impeller magnet shaft on the impeller magnet, which can avoid the wear problem caused by the non-concentricity of the pump shaft and the power machine shaft; it is beneficial to the stability of the impeller relative to the impeller magnet shaft, and ensures the uniform anti-wear effect of the anti-wear sleeve on the impeller as a whole. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is the overall schematic diagram of the device;

[0026] Figure 2 for Figure 1 A cross-sectional view of the device in the AA direction;

[0027] Figure 3An exploded view of the device;

[0028] Figure 4 for Figure 2 A partial schematic diagram of

[0029] Figure 5 for Figure 4 A top view of

[0030] Figure 6 for Figure 3 Schematic diagram of the bottom structure of the middle impeller middle frame;

[0031] Figure 7 It is a schematic diagram of the structure of the anti-wear sleeve.

[0032] Figure numerals: 1. impeller magnet; 2. impeller middle frame; 3. impeller; 4. impeller magnet shaft; 5. anti-wear sleeve; 6. shaft through hole; 7. threaded hole; 8. positioning screw; 9. notch; 10. hole; 11. center hole; 12. groove; 13. anti-wear cover; 14. anti-wear pad. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0034] As shown in the figure, an anti-wear structure of a water pump impeller includes:

[0035] Impeller magnet 1, impeller middle frame 2, impeller 3, impeller magnet shaft 4, anti-wear sleeve 5, shaft through hole 6, threaded hole 7, positioning screw 8, notch 9, hole 10, center hole 11, groove 12, anti-wear cover 13, anti-wear pad 14.

[0036] Combination Figure 1-7As shown, an anti-wear structure of a water pump impeller includes a coaxially arranged impeller magnet 1, an impeller 3, an impeller middle frame 2, an impeller magnet shaft 4 and an anti-wear sleeve 5. The impeller magnet shaft 4 is arranged at the center position of the impeller magnet 1, and the two are fixed as a whole. The impeller magnet 1 is nested in the bottom of the impeller middle frame 2 through the impeller magnet shaft 4. The impeller middle frame 2 is directly injection-molded in the shaft sleeve portion and a center hole 11 is provided. The anti-wear sleeve 5 is installed in the center hole 11. The anti-wear sleeve 5 is arranged at the center position of the impeller middle frame 2. The anti-wear sleeve 5 is provided with an axial through hole 6 at the center line position of the shaft. The impeller magnet shaft 4 connects the impeller magnet to the impeller middle frame 2 through the axial through hole 6. 1 is nested with the impeller middle frame 2; a threaded hole 7 is provided on the upper part of the axis of the impeller magnet shaft 4; a positioning screw 8 is provided at the center of the impeller 3, and the positioning screw 8 is inserted into the threaded hole 7, so that the impeller 3 is nested at the top of the impeller magnet shaft 4 and covers the top of the impeller middle frame 2, and an anti-wear cover 13 is coaxially embedded in the center of the bottom of the impeller 3, and an anti-wear pad 14 is coaxially embedded in the impeller magnet shaft 4, so that the contact positions of the impeller magnet 1, the impeller middle frame 2 and the impeller 3 respectively form two friction pairs, and under the action of the anti-wear sleeve 5, a complete anti-wear structure of the pump impeller is formed.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the present invention and are not intended to limit the technical solutions described in the present invention. Therefore, although the present invention has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that the present invention can still be modified or replaced by equivalents. All technical solutions and improvements that do not depart from the spirit and scope of the present invention should be included in the scope of the claims of the present invention.

[0038] Specific working process:

[0039] The impeller magnet 1 of the brushless magnetic water pump is injection molded into one piece with the impeller magnet shaft 4. The impeller magnet 1 and the impeller 3 are connected through the impeller magnet shaft 4, with an impeller middle frame 2 in the middle. The center of the impeller middle frame 2 has a directly injection molded shaft sleeve part, and a center hole 11 is arranged in the shaft sleeve part. The wear-resistant shaft sleeve 5 made of high-performance graphite fixes the shaft in the center hole 11 of the impeller middle frame 2. The impeller magnet shaft 4 passes through the shaft through hole 6 of the impeller middle frame 2 to sleeve the impeller magnet 1 and the impeller middle frame 2 together. A threaded hole 7 is arranged at the top of the impeller magnet shaft 4 at the center line position, and the positioning screw 8 in the center of the impeller 3 is screwed and fixed in the threaded hole 7, so that the impeller 3 is sleeved on the impeller magnet shaft 4 and covers the impeller middle frame 2.

[0040] The torque of the brushless magnetic pump motor is generated by the magnetic field generated by the coil on the silicon steel sheet (stator) after being energized to drive the permanent magnet (rotor) to work. The magnetic patch is magnetized at n (n is an even number) levels so that the magnetic patch parts form a complete coupled magnetic system. When the magnetic poles generated by the stator coil are opposite to the magnetic poles of the magnet, that is, the displacement angle Φ between the two magnetic poles is 0, the magnetic energy of the magnetic system is the lowest; when the magnetic poles rotate to the same poles, the magnetic energy of the magnetic system is the largest. After removing the external force, due to the mutual repulsion of the magnetic poles of the magnetic system, the magnetic force will restore the magnet to the state of the lowest magnetic energy. Then the magnet moves and drives the magnetic rotor to rotate. The brushless magnetic pump uses electronic commutation and does not require the use of carbon brushes. The magnetic rotor, stator and silicon steel sheet all have multi-level magnetic fields. When the magnetic rotor rotates an angle relative to the stator, the magnetic pole direction will automatically change, so that the rotor always maintains the same-level repulsion, so that the brushless magnetic pump has a higher speed and efficiency. The impeller 3 is in the middle because the anti-wear sleeve 5 made of high-performance graphite material has the characteristics of wear resistance, self-repair, and long-term operation. Three of the square notches 9 are evenly distributed on the periphery of the anti-wear sleeve 5. For example, in a specific embodiment, the notch 9 is 1.5 mm apart from the anti-wear sleeve 5. Four circular holes 10 are arranged on the periphery of the square notch 9 at the same time. The circular holes 10 cooperate with the square notch 9 to form a closed flow field through the pressure difference of the impeller 3 rotating, which is conducive to the coolant to take away the heat generated by the friction of the two friction pairs formed by the upper and lower end surfaces of the anti-wear sleeve 5 through the square notch 9, respectively, and the circular holes 10 cooperate with the square notch 9 to form a closed flow field through the pressure difference of the impeller 3 rotating to form a closed flow field, which is also convenient for the replacement of the coolant in the U-shaped groove 12. When the whole works, the coolant can circulate and efficiently take away the heat of the friction pair of the anti-wear sleeve 5, thereby extending the service life of the anti-wear sleeve 5. Therefore, the wear resistance of the magnetic water pump is greatly improved.

Claims

1. An anti-wear structure for a water pump impeller, comprising an impeller magnet (1), an impeller (3), an impeller middle frame (2), an impeller magnet shaft (4) and an anti-wear sleeve (5), characterized in that: The impeller magnet shaft is coaxially arranged with the impeller magnet, the impeller magnet (1) is nested in the bottom of the impeller middle frame (2) through the impeller magnet shaft (4), the anti-wear sleeve (5) is coaxially arranged in the center hole (11) of the impeller middle frame (2), the impeller (3) is coaxially covered on the top of the impeller middle frame (2), and the impeller (3) is nested in the top of the impeller magnet shaft (4).

2. The anti-wear structure of a water pump impeller according to claim 1, characterized in that: An axial through hole (6) is provided in the central axis of the anti-wear sleeve (5), and the impeller magnet shaft (4) is inserted into the anti-wear sleeve (5) through the axial through hole (6), so that the impeller magnet (1) and the impeller middle frame (2) are nested.

3. The anti-wear structure of a water pump impeller according to claim 2, characterized in that: A threaded hole (7) is provided at the upper part of the axis of the impeller magnet shaft (4), and the threaded hole (7) is used to be matched with a screw; a positioning screw (8) is provided at the center of the impeller (3), and the positioning screw (8) is screwed and fixed in the threaded hole (7) to nest the impeller (3) in the impeller magnet shaft (4) and cover the impeller middle frame (2).

4. The anti-wear structure of a water pump impeller according to claim 1, characterized in that: An anti-wear cover (13) is coaxially embedded in the center of the bottom of the impeller (3), an anti-wear pad (14) is coaxially embedded in the impeller magnet (1), and the upper and lower end surfaces of the anti-wear sleeve (5) respectively cooperate with the anti-wear cover (13) and the anti-wear pad (14) to form two friction pairs.

5. The anti-wear structure of a water pump impeller according to claim 1, characterized in that: The end surface of the anti-wear sleeve (5) is provided with a groove (12), and the groove (12) is used to provide a space in a contact friction state so that the coolant is distributed in the groove (12).

6. The anti-wear structure of a water pump impeller according to claim 2, characterized in that: A shaft sleeve portion extending in the axial direction is provided in the center of the impeller middle frame (2), and the impeller magnet shaft (4) and the anti-wear sleeve (5) are both embedded in the shaft sleeve portion; the shaft sleeve portion is provided with a notch (9) penetrating the impeller middle frame in the longitudinal direction, and the notch (9) is close to the outer side of the center hole (11).

7. The anti-wear structure of a water pump impeller according to claim 6, characterized in that: Holes (10) are arranged at the top of the horizontal frame of the impeller middle frame (2), and the holes (10) are distributed outside the slot (9). The holes (10) are used to form a closed flow field by cooperating with the pressure difference of the slot (9) through the rotation of the impeller (3).

8. The anti-wear structure of a water pump impeller according to claim 5, characterized in that: The grooves (12) are U-shaped grooves, distributed on the end surface of the anti-wear sleeve (5) and equally divided at an angle of 120 degrees.

9. The anti-wear structure of a water pump impeller according to claim 6, characterized in that: The cross section of the notches (9) is rectangular and is evenly distributed in the plane radial direction, with adjacent notches (9) forming an angle of 120 degrees.

10. The anti-wear structure of a water pump impeller according to claim 7, characterized in that: The holes (10) are circular holes, which are evenly distributed in the radial direction of the plane, and adjacent holes (10) form an angle of 90 degrees.

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