CN211629998U

CN211629998U - Cooling structure of new forms of energy motor casing

Info

Publication number: CN211629998U
Application number: CN202020633750.3U
Authority: CN
Inventors: 孙仁坤
Original assignee: Chongqing Zhicheng Machinery Co ltd
Current assignee: Chongqing Zhicheng Machinery Co ltd
Priority date: 2020-04-24
Filing date: 2020-04-24
Publication date: 2020-10-02
Anticipated expiration: 2030-04-24

Abstract

The utility model provides a cooling structure of new forms of energy motor casing, includes motor casing, inside being equipped with of the conch wall of motor casing is by the fashioned a plurality of water courses that encircle that are parallel to each other of psammitolite, through connecting the water course intercommunication between two adjacent encircles water course, all be equipped with at least two sections in the encircleing section of respectively encircleing the water course and follow the muscle section that separates of water course flow direction extension, separate the water course that encircles by separating the muscle section and separate for last runner, runner down, go up runner, runner parallel extension down, the width of going up runner, runner down is the same, constitutes motor casing's cooling water course structure from this.

Description

Cooling structure of new forms of energy motor casing

Technical Field

The utility model relates to a motor casing casting technical field, in particular to cooling structure of new forms of energy motor casing.

Background

The new energy automobile is an electric automobile adopting electric energy as power, an electric drive and control system is the core of the electric automobile, a drive motor is an important part of the electric drive and control system, the heat productivity of the drive motor is huge in the operation process, in order to ensure the continuous and stable operation of the electric automobile, the drive motor needs to be cooled in the operation process, in order to ensure the cooling effect, a motor shell with a water cooling circulation channel inside is preferably used, and at present, a spiral single water channel structure with a better cooling effect is usually arranged in the motor shell. Aluminum alloy is mostly adopted to new energy automobile's motor casing, aluminum alloy motor casing's advantage is light in weight, heat dispersion is good, the heat conductivity is good, can die-casting, plastic property is good, the percentage elongation is higher than iron, the noise is low, aluminum alloy motor casing's waterproof grade will reach more than IP67 level, require that cast aluminum alloy motor casing can not have the sand hole, defects such as pinhole, and present spiral water course relies on the foundry molding of psammitolite, in the casting process, because the psammitolite width is big, it is effectual to keep warm, the aluminium water solidifies slowly, produce the shrinkage porosity defect easily and lead to the product inner wall seepage, scrap, the high manufacturing cost of disability rate also is. Therefore, how to improve the casting defects of the spiral water channel and improve the product quality and safety is an urgent problem to be solved.

Disclosure of Invention

The utility model discloses a solve the problem that prior art exists above, provide a new forms of energy motor casing's cooling structure, can improve the casting defect of traditional motor casing spiral single water course, promote product quality and security, the technical scheme of the utility model as follows:

The widths of the upper runner and the lower runner are less than half of the width of the surrounding water channel.

The outer wall of the motor shell is provided with a plurality of process holes for removing sand cores, the process holes respectively correspond to the intermittent positions of the partition rib sections in the surrounding sections of the surrounding water channel, and the process holes are sealed by plugs after the motor shell is molded.

The motor shell is cast by aluminum alloy.

Adopt above-mentioned technical scheme: the motor shell structure comprises a motor shell, wherein a plurality of parallel surrounding water channels formed by sand cores are arranged in the shell wall of the motor shell, two adjacent surrounding water channels are communicated through a connecting water channel, at least two partition rib sections extending along the flow direction of the water channels are arranged in the surrounding sections of the surrounding water channels, the surrounding water channels are divided into an upper flow channel and a lower flow channel by the partition rib sections, the upper flow channel and the lower flow channel extend in parallel, the widths of the upper flow channel and the lower flow channel are the same, and therefore the motor shell cooling water channel structure is formed, and a water inlet and a water outlet are formed in the cooling water channel. The surrounding water channel is divided into an upper flow channel and a lower flow channel by arranging the spacer rib section in the surrounding section of the surrounding water channel, correspondingly, an upper flow channel forming part, a lower flow channel forming part and a spacer rib forming part are also arranged in the sand core for forming, the spacer rib section in the surrounding water channel is formed by the spacer rib forming part, the flow channel forming part of the sand core is divided into the upper flow channel forming part and the lower flow channel forming part by the spacer rib forming part, and the forming part surrounding the water channel with larger volume of the sand core is divided into two forming parts with smaller volume, so that the heat insulation effect of the forming part is reduced during casting, aluminum water can be quickly solidified, casting defects are reduced, shrinkage defects are not easy to generate to cause leakage and scrapping of the inner wall of the motor shell, the quality and the safety of a product are greatly improved, the scrapping rate is reduced, the cost is controlled, and the surrounding water channel of the motor shell is divided into the upper flow channel and the lower flow channel by the spacer, the cooling contact area is enlarged, the water resistance is increased, the cooling efficiency is improved, and the high temperature generated when the motor works in the motor shell can be rapidly reduced.

The outer wall of the motor shell is provided with a plurality of process holes for removing sand cores, the process holes correspond to the intermittent positions of the partition rib sections in the surrounding sections surrounding the water channel respectively, and the process holes are sealed by plugs after the motor shell is molded to form closed cavities surrounding the water channel, so that cooling liquid can pass through the closed cavities, and the cooling liquid is prevented from leaking.

The motor shell is cast by aluminum alloy, and the motor shell made of the aluminum alloy has the advantages of light weight, good heat dissipation performance, good heat conductivity, capability of being die-cast, good plasticity, higher elongation than iron and low noise.

The invention is further described with reference to the drawings and the specific embodiments.

Drawings

Fig. 1 is a cross-sectional view of a motor housing;

FIG. 2 is a schematic diagram of the structure of a sand core;

FIG. 3 is a cross-sectional view of FIG. 2;

fig. 4 is an external structural view of the motor housing.

Detailed Description

The utility model discloses an embodiment of new forms of energy motor casing's cooling structure:

referring to fig. 1 to 4, the cooling structure of the new energy motor casing comprises a motor casing 1, wherein a plurality of parallel surrounding water channels 4 formed by sand cores 2 are arranged inside a casing wall of the motor casing 1, two adjacent surrounding water channels 4 are communicated through a connecting water channel 6, at least two partition rib sections 7 extending along the flow direction of the water channels are arranged in surrounding sections of the surrounding water channels 4, and the surrounding water channels 4 are divided into an upper flow channel 4-1 and a lower flow channel 4-2 by the partition rib sections 7, so that the upper flow channel 4-1 and the lower flow channel 4-2 jointly form the surrounding water channels 4. The upper flow channel 4-1 and the lower flow channel 4-2 extend in parallel, the widths of the upper flow channel 4-1 and the lower flow channel 4-2 are the same, and the widths of the upper flow channel 4-1 and the lower flow channel 4-2 are both smaller than one half of the width of the surrounding water channel 4, so that a cooling water channel structure of the motor shell 1 is formed, and a water inlet and a water outlet are formed in the cooling water channel. The outer wall of motor casing 1 is equipped with a plurality of fabrication holes 8 that are used for cleaing away the psammitolite, and this fabrication hole 8 corresponds the department of being interrupted of the section mesophragma section 7 in encircleing around water course 4 respectively, and motor casing 1 seals fabrication hole 8 with the end cap after the shaping, forms the closed cavity who encircles water course 4 to the coolant liquid passes through, avoids the coolant liquid to spill. A sand core 2 for molding comprises an upper runner molding part 9, a lower runner molding part 10, a partition rib molding part 11, an intermittent molding part 12 and a connecting water channel molding part 16, wherein a connecting water channel 6 in a surrounding water channel 4 is molded by the connecting water channel molding part 16, a partition rib section 7 in the surrounding water channel 4 is molded by the partition rib molding part 11, the intermittent part of the partition rib section 7 in the surrounding water channel 4 is molded by the intermittent molding part 12, the surrounding section of the surrounding water channel 4 is provided with the partition rib section 7 to divide the surrounding water channel 4 into an upper runner 4-1 and a lower runner 4-2 which are respectively molded by the upper runner molding part 9 and the lower runner molding part 10 in the sand core 2, the runner molding part of the sand core 2 is divided into the upper runner molding part 9 and the lower runner molding part 10 by the partition rib molding part 11 to divide the molding part of the surrounding water channel 4 with larger volume of the sand core 2 into two molding parts with smaller volumes, from this make the heat preservation effect of shaping portion obtain reducing when the casting, let the aluminium water solidify fast, reduced the casting defect, be difficult to produce the shrinkage porosity defect and lead to motor casing 1 inner wall seepage, scrap, promoted product quality and security greatly, reduced the disability rate, make the cost control. Moreover, after the surrounding water channel 4 of the manufactured motor shell 1 is divided into an upper flow channel 4-1 and a lower flow channel 4-2 by the rib section 7, the cooling contact area is enlarged, the water resistance is increased, the cooling efficiency is improved, and the high temperature generated when the motor works in the motor shell 1 can be rapidly reduced. The sand core is characterized in that a plurality of vertical positioning portions are further arranged on the outer side of the sand core 2, the connecting portions of the vertical positioning portions and the outer side of the sand core 2 correspond to the process holes 8 in the outer wall of the motor shell 1 in a one-to-one mode, in the embodiment, three vertical positioning portions are arranged, namely a first vertical positioning portion 13, a second vertical positioning portion 14 and a third vertical positioning portion 15, the central angle formed by the first vertical positioning portion 13 and the second vertical positioning portion 14 is 90 degrees, the central angle formed by the second vertical positioning portion 14 and the third vertical positioning portion 15 is 90 degrees, the included angle formed by the third vertical positioning portion 15 and the first vertical positioning portion 13 is 180 degrees, and the three vertical positioning portions are matched with the bottom formwork to play roles in positioning and fixing the sand core 2, so that the sand core 2 is accurately positioned, and the qualified rate. The motor shell 1 is cast by aluminum alloy, and the motor shell 1 made of the aluminum alloy has the advantages of light weight, good heat dissipation performance, good heat conductivity, capability of being die-cast, good plasticity, higher elongation than iron and low noise.

When the motor works, the cooling liquid flows in from the water inlet of the motor shell 1, enters each circle of the surrounding water channel 4 through the adjacent two connecting water channels 6 between the surrounding water channels 4, flows out from the water outlet of the motor shell 1 at last, takes away heat and reduces the temperature of the motor.

Claims

1. The utility model provides a cooling structure of new forms of energy motor shell, includes motor casing (1), inside being equipped with of the conch wall of motor casing (1) by a plurality of water channels (4) that encircle that are parallel to each other of psammitolite (2) fashioned, two adjacent encircle through connecting water channel (6) intercommunication between water channel (4), its characterized in that: at least two partition rib sections (7) extending along the flow direction of the water channel are arranged in the surrounding sections of the surrounding water channel (4), the surrounding water channel (4) is divided into an upper flow channel (4-1) and a lower flow channel (4-2) by the partition rib sections (7), the upper flow channel (4-1) and the lower flow channel (4-2) extend in parallel, the widths of the upper flow channel (4-1) and the lower flow channel (4-2) are the same, and therefore the cooling water channel structure of the motor shell (1) is formed, and a water inlet and a water outlet are formed in the cooling water channel.

2. The cooling structure of the new energy motor casing of claim 1, characterized in that: the widths of the upper flow channel (4-1) and the lower flow channel (4-2) are less than half of the width of the surrounding water channel (4).

3. The cooling structure of the new energy motor casing of claim 1, characterized in that: the outer wall of the motor shell (1) is provided with a plurality of process holes (8) used for removing sand cores, the process holes (8) correspond to the discontinuous positions of the middle partition rib sections (7) in the surrounding sections surrounding the water channel (4) respectively, and the process holes (8) are sealed by plugs after the motor shell (1) is molded.

4. The cooling structure of the new energy motor casing of claim 1, characterized in that: the motor shell (1) is cast by adopting aluminum alloy.