Heat dissipation structure of brushless magnetic water pump

Abstract

The utility model relates to the technical field of brushless magnetic transmission water pumps, and discloses a heat dissipation structure of a brushless magnetic water pump, which comprises a water pump volute, an impeller assembly, a waterproof sleeve, a bushing, a driving magnet, a brushless motor, a sealing cover plate, an outgoing line sealing plug, a sealing gasket, a motor end cover and a motor casing, the impeller assembly is installed in the water pump volute, sealing rings are connected to the two ends of the waterproof sleeve, the sealing ring at one end abuts against the bottom of the impeller assembly, and the sealing ring at the other end is clamped in a groove in the lining. The heat of the brushless motor can be stably conducted through the conduction path of the motor shell, the lining, the water pump volute and the cooling liquid, the temperature of the motor shell can be stabilized within the temperature difference of 10 DEG C of the cooling liquid through the heat dissipation structure, the high-temperature resistance of the water pump is improved, the working environment temperature of the driving plate is synchronously reduced, and the service life of the driving plate is prolonged. The service lives of the driving plate and the water pump are prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of brushless magnetic transmission water pumps, in particular to a heat dissipation structure of a brushless magnetic water pump. Background Art

[0002] There are two main types of automotive coolant drive pumps on the market: shielded-drive pumps and magnetic-drive pumps. Shielded-drive pumps feature a direct connection between the brushless motor's rotor and the drive impeller. A protective shield around the rotor's outer ring provides a confined space, enclosing the rotor and magnets in coolant. The outer side of the shield is in direct contact with the stator, allowing the coolant to remove heat from the motor's stator and rotor, providing better heat dissipation. However, the clearance between the motor rotor and the shield in shielded pumps is small, around 0.5mm per side. These pumps are sensitive to impurities in the coolant and can easily become clogged, causing them to jam. The advantage of magnetic-drive pumps is that the brushless motor is separated from the impeller. Through magnetic coupling, the minimum clearance between the impeller assembly's magnets and the water-blocking sleeve is approximately 2.0mm, effectively preventing clogging. However, the separation of the brushless motor from the impeller prevents the motor's heat from being effectively transferred to the coolant. High-power magnetic-drive pumps, operating in high-temperature environments, can easily trigger the brushless motor to activate high-temperature protection due to the inability to transfer heat quickly.

[0003] This field urgently needs a heat dissipation structure that can effectively improve the brushless magnetic transmission water pump, provide a stable heat dissipation structure for the water pump brushless motor, and improve the service life of the brushless magnetic transmission water pump and its ability to cope with high temperature working conditions. Utility Model Content

[0004] In order to solve the technical problem that the heat energy of the brushless motor is not transferred in time, which easily leads to the high temperature protection of the brushless motor being started, thereby affecting the normal operation of the water pump, the utility model provides a heat dissipation structure of a brushless magnetic water pump.

[0005] The utility model is implemented by the following technical solutions: a heat dissipation structure of a brushless magnetic transmission water pump, including a water pump volute, an impeller assembly, a water blocking sleeve, a bushing, an active magnet, a brushless motor, a sealing cover, an outlet sealing plug, a sealing gasket, a motor end cover, and a motor housing. The brushless motor is connected to the active magnet through a motor shaft, and the impeller assembly is installed inside the water pump volute. Sealing rings are connected at both ends of the water blocking sleeve, and the sealing ring at one end supports the bottom of the impeller assembly, and the sealing ring at the other end is stuck in the internal groove of the bushing. The bushing is clamped in the water pump volute, and one end of the bushing is installed on the top of the brushless motor housing. The brushless motor uses bolts to push the water pump volute and the bushing onto the brushless motor housing.

[0006] Through the above technical solution, the water pump volute and the bottom of the bushing are directly in contact with the brushless motor housing, forming a heat exchange path of the brushless motor housing-water pump volute-coolant.

[0007] As a further improvement of the above solution, the water pump volute is made of aluminum alloy.

[0008] Through the above technical solution, the material properties are utilized to achieve highly efficient heat energy transfer.

[0009] Compared with the prior art, the beneficial effects of the present invention are:

[0010] The utility model can stably conduct the heat generated by the brushless motor through the conduction path of the motor housing, bushing, water pump volute and coolant. The heat dissipation structure can ensure that the temperature of the motor housing is stable within a temperature difference of 10°C of the coolant, thereby improving the high-temperature resistance of the water pump, and simultaneously reducing the working environment temperature of the drive plate, thereby extending the service life of the drive plate and the water pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a schematic diagram of the overall structure of a heat dissipation structure of a brushless magnetic water pump provided in Example 1 of the present utility model;

[0012] Figure 2 This is a schematic diagram of the explosion structure of the utility model;

[0013] Figure 3 For this utility model Figure 1 Schematic diagram of the cross-section structure;

[0014] Figure 4 This is a schematic diagram of the heat energy transfer direction of the present invention.

[0015] Description of main symbols:

[0016] 1. Water pump volute; 2. Impeller assembly; 3. Waterproof sleeve; 4. Bushing; 5. Active magnet; 6. Brushless motor. DETAILED DESCRIPTION

[0017] Below, the present invention is further described in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0018] Example 1:

[0019] Please combine Figure 1-Figure 4The heat dissipation structure of a brushless magnetic transmission water pump of this embodiment includes a water pump volute 1, an impeller assembly 2, a water blocking sleeve 3, a bushing 4, an active magnet 5, a brushless motor 6, a sealing cover plate, a wire sealing plug, a sealing gasket, a motor end cover, and a motor housing. The brushless motor 6 is connected to the active magnet 5 through a motor shaft, and the impeller assembly 2 is installed inside the water pump volute 1. Sealing rings are connected at both ends of the water blocking sleeve 3. The sealing ring at one end supports the bottom of the impeller assembly 2, and the sealing ring at the other end is stuck in the internal groove of the bushing 4. The bushing 4 is clamped in the water pump volute 1, and one end of the bushing 4 is installed at the top of the brushless motor 6 housing. The brushless motor 6 uses bolts to push the water pump volute 1 and the bushing 4 onto the brushless motor 6 housing.

[0020] The water pump volute 1 is made of aluminum alloy.

[0021] The implementation principle of the heat dissipation structure of a brushless magnetic water pump in the embodiment of the present application is:

[0022] First, press the active magnet 5 onto the motor shaft with an interference fit so that the motor shaft can directly drive the active magnet 5. Clamp the rubber ring around the outer periphery of the impeller assembly 2 and install it to the bottom of the water pump volute 1. Install the waterproof sleeve 3 in the volute, on the outside of the impeller assembly 2. Install the sealing ring in the groove of the bushing 4, and clamp the bushing 4 as a whole along the bottom of the water pump volute 1 to the waterproof sleeve. The water pump volute 1 forms an integral structure. Clamp the integral structure onto the top of the motor active magnet 5, and use bolts to tighten the water pump volute 1 to fit it on the motor housing to form a tightly fitting structure. When the magnetic water pump is working, the brushless motor 6 will continue to generate heat. The brushless motor 6 is a sealed structure with IP68 protection. The sealed structure will block the heat exchange with the outside, and the heat of the brushless motor 6 will be conducted to the brushless motor 6 casing. The top of the motor casing and part of the side wall are in direct contact with the inner wall of the water pump volute 1 and the top of the bushing 4. The heat is conducted from the top of the brushless motor 6 casing to the inner wall of the water pump volute 1 and the top of the bushing 4. At the same time, the bushing 4 will also conduct the heat to the inner wall of the water pump volute 1 through the outer wall. The water pump volute 1 is made of aluminum alloy with a thermal conductivity of up to 130 (W / mK), which can quickly conduct the heat of the brushless motor 6 and the bushing 4 to the inside of the water pump volute 1. The inside of the water pump volute 1 is in direct contact with the transmission liquid. The circulation of the liquid directly takes away the heat of the water pump volute 1, forming a fast heat conduction path, ensuring that the water pump can operate stably under higher temperature conditions.

[0023] The above-mentioned embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and replacements made by technicians in this field on the basis of the present invention fall within the scope of protection required by the present invention.

Claims

1. A heat dissipation structure of a brushless magnetic water pump, comprising: Water pump volute, impeller assembly, water blocking sleeve, bushing, active magnet and brushless motor; It is characterized in that the brushless motor is connected to the active magnet through the motor shaft, the impeller assembly is installed inside the water pump volute, and sealing rings are connected at both ends of the water-proof sleeve. The sealing ring at one end supports the bottom of the impeller assembly, and the sealing ring at the other end is stuck in the internal groove of the bushing. The bushing is clamped in the water pump volute, and one end of the bushing is installed on the top of the brushless motor housing. The brushless motor uses bolts to push the water pump volute and the bushing onto the brushless motor housing.

2. The heat dissipation structure of a brushless magnetic water pump according to claim 1, characterized in that: The water pump volute is made of aluminum alloy.

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