CN113014050B - Heat dissipation casing assembly for motor and manufacturing method - Google Patents

Abstract

The invention discloses a heat radiation casing component for a motor and a manufacturing method thereof, wherein the method comprises the following steps: a straight cylindrical shell with a cavity for accommodating internal components of the motor is formed by cutting a strip-shaped steel pipe; more than two arc-shaped air-cooled heat dissipation modules are arranged on the periphery of the formed shell, so that an air-cooled radiator which surrounds the outside of the shell and can dissipate heat of the shell is formed through the air-cooled heat dissipation modules; in the process of arranging the arc-shaped air-cooled heat dissipation modules on the periphery of the shell, every two adjacent air-cooled heat dissipation modules are connected together by an elastic connection method, so that the formed air-cooled radiator can automatically adapt to the expansion with heat and the contraction with cold of the shell of the motor. According to the method, the shell of the motor is cut by the steel pipe according to the specification requirement of the motor, molds with different specifications do not need to be manufactured, the radiator outside the shell is formed by splicing a plurality of radiating fins, so that the radiating fins are easy to process, and the spliced radiator can adapt to expansion with heat and contraction with cold of the motor.

Description

Heat dissipation casing assembly for motor and manufacturing method

The invention is a divisional application with the application date of 5/8/2020 and the application number of 202010382269.6, which is named as a heat radiation casing component for a motor and a manufacturing method.

The divisional application protects a heat dissipation case assembly for a motor and a part adopting an air-cooled heat dissipation module in a manufacturing method.

Technical Field

The invention relates to the technical field of motors, in particular to a radiating shell assembly for a motor and a manufacturing method of the radiating shell assembly.

Background

The motor comprises a shell, a stator and a rotor which are arranged in a cavity of the shell, end covers arranged at two ends of the shell and a radiator arranged on the outer surface of the shell. The interior of the housing is a hollow structure, and is generally manufactured by a manufacturing method such as integral casting or extrusion molding.

As shown in fig. 7, an extruded extrusion housing 8 has the following disadvantages: the extrusion type shell is generally made of aluminum alloy, is usually made of 6063-T5, has the yield strength of only 145Mpa and low strength, and cannot meet the strength requirements of large-volume and large-torque motors. Moreover, the aluminum housing is limited in the field of explosion-proof motors, and is difficult to meet the requirements of explosion-proof motors. In addition, the extrusion type shell needs a special extruder for processing, a large-size extrusion die needs a large-tonnage pressure extruder, the large-tonnage pressure extruder is less in equipment at home, the production period is long, and the price is high.

As shown in fig. 8 and 9, the cast housing 9 has the following disadvantages: the casting type shell is generally made of cast iron, one mould for casting the shell can only produce the shell with one structural size, and when the shells with various specifications and sizes are produced, various moulds are needed, so that the quantity of the moulds is large, and the cost is high. Moreover, the casting period of the shell is long, and the stock pressure is large.

Therefore, when the casing which is integrally cast or extruded is required to meet the requirements of multiple models and multiple power sections, multiple sets of moulds with different specifications need to be manufactured, and for small-batch motor products, the economic benefit is not ideal, and the cost of the required moulds is higher.

Disclosure of Invention

The invention aims to solve the problems in the prior art and provides a method for manufacturing a radiating shell assembly of a motor, wherein a shell of the motor is cut by a steel pipe according to the specification requirements of the motor without manufacturing a plurality of moulds with different specifications; in addition, a heat dissipation casing assembly for the motor is also provided.

To achieve the above object, according to one aspect of the present invention, there is provided a method of manufacturing a heat-dissipating housing assembly for an electric machine, including:

a straight cylindrical shell with a cavity for accommodating internal components of the motor is formed by cutting a strip-shaped steel pipe;

more than two arc-shaped air-cooled heat dissipation modules are arranged on the periphery of the formed shell, so that an air-cooled radiator which surrounds the outside of the shell and can dissipate heat of the shell is formed through the air-cooled heat dissipation modules;

in the process of arranging the arc-shaped air-cooled heat dissipation modules on the periphery of the shell, every two adjacent air-cooled heat dissipation modules are connected together by an elastic connection method, so that the formed air-cooled radiator can automatically adapt to the expansion with heat and the contraction with cold of the motor shell.

And the two adjacent air-cooled heat dissipation modules are air-cooled heat dissipation modules with mounting holes on the radial end faces.

The method comprises the step of connecting every two adjacent air-cooled radiating modules together through a spring.

Wherein, through two liang of adjacent forced air cooling heat dissipation modules of spring coupling include:

sleeving the spring on the screw;

the head end of a screw with a spring penetrates through a mounting hole on one of every two adjacent air-cooled radiating modules, so that the spring is positioned on the air-cooled radiating module;

and the head end of the screw penetrates through the mounting hole of the other air-cooled heat dissipation module, and the nut is fastened at the head end of the screw so as to connect the two air-cooled heat dissipation modules.

Further, the step of smearing the heat conduction material used for enhancing the heat conduction efficiency between the shell and the air-cooled radiator is also included.

Further, the method also comprises the following steps: the pair of axial end faces of each air-cooling heat dissipation module are respectively butted with the first end cover and the second end cover, so that the upper end cover and the lower end cover which are respectively connected with the two ends of the shell are formed by assembling the plurality of first end covers and the plurality of second end covers.

In addition, the present invention also provides a heat-dissipating housing assembly for a motor, comprising: a straight cylindrical shell for accommodating a cavity of an internal component of the motor is arranged in the motor; the air-cooled heat dissipation modules are arranged on the periphery of the shell and can be assembled to form an air-cooled radiator which surrounds the outside of the shell and can dissipate heat of the shell; the elastic connection structure is used for connecting every two adjacent air-cooled heat dissipation modules in the plurality of arc-shaped air-cooled heat dissipation modules together, so that the air-cooled heat dissipater can automatically adapt to the expansion with heat and contraction with cold of the motor shell.

And the two adjacent heat dissipation modules are air-cooled heat dissipation modules with mounting holes on the radial end faces.

The elastic connection structure comprises springs for connecting every two adjacent heat dissipation modules and screws for sleeving the springs on the springs.

Further, the heat-conducting material is coated between the shell and the air-cooled radiator and used for enhancing the heat conduction efficiency between the shell and the air-cooled radiator.

Compared with the prior art, the heat radiation casing component for the motor and the manufacturing method have the following outstanding advantages:

1. the method of the invention, the steel pipe used for manufacturing the shell and the aluminum section used for manufacturing the radiating fin are strip-shaped parts, the length of the parts can reach several meters, and the motor shell components with different lengths can be obtained by cutting the strip-shaped steel pipe and the aluminum section parts. Compared with a casting type casing in the prior art, the problem that multiple molds are needed due to different lengths of the casing is solved, the types and the number of casting molds are reduced, and the problem of high mold cost in small-batch production is solved. In addition, the types of the machine shell stocks are reduced, and the stock cost is reduced. Moreover, the production reaction speed is accelerated, the production efficiency is improved, and the production period is shortened.

2. The heat dissipation casing component comprises a casing made of a steel pipe and a heat radiator formed by connecting a plurality of heat dissipation modules, wherein the heat radiator of the motor consists of a plurality of arc-shaped heat dissipation modules, so that the size of each heat dissipation module is smaller than that of the heat radiator, the size of an extrusion die for manufacturing heat dissipation fins in the heat dissipation modules is reduced, the dependence on a large-tonnage extruder in the process of processing the heat radiator is reduced, the production difficulty of the heat radiator is reduced, the investment cost of production equipment and the die is also reduced, and the production cost of the motor is reduced.

The present invention will be described in detail with reference to the accompanying drawings.

Drawings

FIG. 1 is a half sectional view of an electric machine having a heat sink housing assembly of the present invention;

FIG. 2 is an exploded view of a heat sink housing assembly employing liquid-cooled heat sinks in accordance with the present invention;

FIG. 3 is an exploded view of a liquid cooled heat sink;

FIG. 4 is a cross-sectional view of the heat sink A-A of FIG. 3;

FIG. 5 is a schematic view of the axial end face of the first end cap of the present invention for attachment to a heat sink;

FIG. 6 is an exploded view of the heat sink housing assembly of the present invention employing air-cooled heat sinks;

FIG. 6a is an enlarged view of a portion of FIG. 6;

FIG. 7 is a perspective view of a prior art extrusion housing;

FIG. 8 is a front view of a prior art cast enclosure;

fig. 9 is a left side view of the cast housing of fig. 8.

Detailed Description

The invention provides a manufacturing method of a heat dissipation shell component for a motor, which comprises the following steps:

cutting a strip-shaped steel pipe to form a shell with a cavity for accommodating internal components of the motor;

more than two arc-shaped heat dissipation modules are arranged on the periphery of the formed shell, so that a radiator which surrounds the outside of the shell and can dissipate heat of the shell is formed through the heat dissipation modules;

in the process of arranging the arc-shaped heat dissipation modules on the periphery of the shell, every two adjacent heat dissipation modules are connected together by an elastic connection method, so that the formed heat radiator can automatically adapt to the expansion with heat and the contraction with cold of the motor shell.

During manufacturing, the heat dissipation module of the present invention may adopt a liquid cooling heat dissipation module 610 (as shown in fig. 2-4), an air cooling heat dissipation module 620 (as shown in fig. 6 and 6 a), or other cooling methods in the prior art.

In addition, the present invention also provides a heat-dissipating housing assembly for a motor, comprising: a shell for placing a cavity of an internal component of the motor is arranged in the shell; the heat dissipation modules are arranged on the periphery of the shell and can be assembled to form a radiator which surrounds the shell and can dissipate heat of the shell; the elastic connection structure is used for connecting every two adjacent heat dissipation modules in the plurality of arc-shaped heat dissipation modules together, so that the heat radiator can automatically adapt to the expansion with heat and contraction with cold of the motor shell.

In the manufacturing method, the shell is cut by the steel pipe according to the specification requirement of the motor, so that a plurality of moulds with different specifications do not need to be manufactured according to the motors with different specifications. And the radiator outside the steel pipe shell is formed by splicing a plurality of arc-shaped radiating fins, so that the radiator is convenient to manufacture and process. In a plurality of curved heat dissipation modules, two adjacent heat dissipation modules are connected together through an elastic connection method, so that the distance between the adjacent heat dissipation modules in the assembled heat sink can automatically adapt to the expansion and contraction of the motor shell, namely, when the temperature of the shell is overhigh due to the work of the motor, the distance between every two adjacent heat dissipation modules can be increased, and after the motor stops working or is cooled, the distance between every two adjacent heat dissipation modules can be reduced, thus, the damage of heat dissipation fins caused by mutual extrusion between the heat dissipation fins of the heat dissipation modules when the motor shell is in thermal expansion can be avoided, the service life of the heat sink is prolonged, and the heat dissipation efficiency is favorably improved.

The heat dissipation housing assembly for an electric machine and the manufacturing method thereof according to the present invention will be described in detail with reference to the following embodiments.

Example one

The present embodiment provides a method for manufacturing a heat dissipation housing assembly for an electric machine, wherein the heat dissipation module employs a liquid-cooled heat dissipation module 610 (as shown in fig. 2-3).

As shown in fig. 1 and 2, the housing 1 for the motor of the present embodiment is a housing with a cavity therein for housing internal components of the motor, and is cut from a hollow elongated steel pipe profile. In actual production process, can be according to actual need, intercept one section body in the longer steel pipe of length and use as the casing 1 of motor. Through such operation, the problem that a plurality of molds need to be manufactured when motors with different lengths are produced can be avoided, so that the production cost for manufacturing the molds is reduced.

As shown in fig. 2, the heat sink 600 of the present embodiment is annularly surrounded on the outer surface of the housing 1, the heat sink 600 is formed by splicing 2 or more arc-shaped liquid cooling heat dissipation modules 610, the plurality of arc-shaped heat dissipation modules 610 have the same external dimension, and the inner diameter is equal to or slightly larger than the outer diameter of the housing 1. As shown in fig. 3, each heat dissipation module 610 includes a heat sink 611, a first end cap 612 and a second end cap 613 fixed to both axial end surfaces of the heat sink 611, and a plurality of fixing screws 617. The fixing screws 617 fix the first and second end caps 612 and 613 to the axial end surfaces of the heat sink 611 on both sides. During manufacturing, the heat dissipation fins 611 are made of strip-shaped aluminum profiles produced by an extruder, and the processing technology is simple. In order to fix the heat dissipation fins 611 of the heat dissipation modules 610 on the periphery of the housing 1 and splice the heat dissipation fins 611 together, the present embodiment divides the heat dissipation fins 611 into two types, that is, one type is a plurality of first heat dissipation fins 611a with a threaded hole 611.5 (shown in fig. 2) on the radial end surface, and the threaded holes 611.5 on the first heat dissipation fins 611a are a plurality and are uniformly arranged along the axial extension direction; and the other is a plurality of second heat radiating fins 611b with assembling holes 611.4 (shown in fig. 3) on the radial end surface, the number of the assembling holes 611.4 on the second heat radiating fins 611b is the same as the number of the threaded holes 611.5, and the positions of the assembling holes 611.4 are corresponding to the positions of the threaded holes 611.5.

Further, when designing, a plurality of radial holes 611.2 penetrating through the thickness of the second heat sink 611b (i.e. penetrating the heat sink in the radial direction of the heat sink) may be further disposed on the second heat sink 611b, and the plurality of radial holes 611.2 are located near the radial end surface of the second heat sink with the mounting holes, and each radial hole 611.2 corresponds to and communicates with one mounting hole 611.4. Of course, the radial hole may be a sink recessed from the outer surface of the second fin 611b toward the inner surface.

It should be noted that the radial end surface of a component referred to in the present application means the end surface of the component parallel to the central axis of the motor; the axial end face of a component is an end face perpendicular to the central axis of the motor.

In design, the screw holes 611.5 may be provided on both radial end surfaces of the second heat sink 611b, and the fitting holes 611.4 may be provided on both radial end surfaces of the first heat sink 611 a; the screw holes 611.5 may be provided in the radial end surface of the second fin 611b, the fitting holes 611.4 may be provided in the radial end surface of the second fin 611a, and the fitting holes 611.4 and the screw holes 611.5 may be provided in the radial end surfaces of the first fin 611 a.

When a plurality of arc-shaped heat dissipation modules 610 are arranged on the periphery of the housing, the first heat dissipation fins 611a and the second heat dissipation fins 611b are arranged at intervals, and after the arrangement, every two adjacent heat dissipation modules 610 are connected together by an elastic connection method.

When the adjacent heat dissipation modules 610 are connected together by the elastic connection method, the method includes a step of connecting the adjacent first heat dissipation fins 611a and second heat dissipation fins 611b by a plurality of sets of elastic connection structures (the number of the elastic connection structures is the same as that of the screw holes or the assembly holes).

Each set of elastic connection structures includes a spring 616, a spacer 615 and a screw 614, and connecting two adjacent first and second heat sinks 611a and 611b using the elastic connection structures includes:

sleeving a washer 615 and a spring 616 on the screw 614 in sequence;

the head end of the screw 614 with the washer 615 and the spring 616 is inserted through the assembly hole 611.4 of the second heat sink 611b, so that the tail end of the washer 615, the spring 616 and the screw 614 are located at the radial hole 611.2 on the second heat sink 611 b;

after the head end of the screw 614 passes through the fitting hole 611.4 of the second heat sink 611b, the head end is screwed into the screw hole 611.5 at the corresponding position on the first heat sink 611a, so that the two heat sinks can be coupled together.

The first cooling fins and the second cooling fins adjacent to each other on the periphery of the housing 1 are elastically connected together through the elastic connection structure, and the radiator 600 capable of radiating heat of the housing 1 and surrounding the outside of the housing 1 can be formed through a plurality of radiating modules.

The elastic connection of the adjacent radiating fins through the elastic connection structure has the following advantages that: when the motor generates heat greatly, the distance between the liquid cooling radiating fins can be automatically adjusted through the elasticity of the spring, damage caused by mutual extrusion between the liquid cooling radiating fins when the motor shell is in hot expansion is avoided, and the service life and the use safety of the radiating fins are improved. The end of the washer 615, the spring 616 and the screw 614 can be hidden in the radial hole 611.2, which prevents these elements from protruding from the outer surface of the heat sink, and facilitates reducing the radial size of the motor, thereby allowing the motor to be applied to devices with a narrow assembly space.

When the heat dissipation module 610 is disposed on the outer periphery of the housing 1, in addition to the first heat dissipation fins 611a and the second heat dissipation fins 611b disposed on the outer periphery of the housing 1 at intervals, the first end cap 612 and the second end cap 613 are respectively abutted to a pair of axial end surfaces of each heat dissipation fin, so that the liquid-cooled heat dissipation module 610 capable of dissipating heat of the housing 1 by using liquid is formed by the corresponding first end cap 612, the corresponding heat dissipation fins 611, and the corresponding second end cap 613.

As shown in fig. 3 and 4, a plurality of cooling cavities 611.1 parallel to the axial direction of the heat sink 611 (including the first heat sink 611a and the second heat sink 611b) are formed on the heat sink 611, the cooling cavities 611.1 penetrate through the axial end surfaces of the two sides of the heat sink 611, and notches 611.3 are formed in the cooling cavities 611.1 to connect the individual cooling cavities 611.1 in the heat sink 611 in a conductive manner. Preferably, the notches 611.3 in this embodiment may be sunken portions respectively disposed on axial end surfaces of both ends of the heat sink 611, and the sunken portions on the axial end surfaces of both ends are disposed at intervals.

Further, to form the liquid cooling heat dissipation module 610, as shown in fig. 3 and 5, a plurality of first sealing grooves 612.2 recessed along the axial direction are formed on one axial end surface of the first end cap 612 (i.e., one axial end surface for abutting against the corresponding axial end surface of the heat dissipation fin 611), a pair of radial holes for water inlet or water outlet, i.e., the radial hole 612.4 and the radial hole 612.3, extending in the radial direction and respectively communicated with a pair of first sealing grooves 612.2 located at two ends of the plurality of first sealing grooves 612.2, are formed at two ends of the first end cap 612, and the pair of radial holes are counter bores, and an opening is formed in an outer wall of the first end cap. Further, a plurality of second seal grooves 613.1 recessed in the axial direction are formed in one axial end surface of the second end cap 613 (i.e., one axial end surface for abutting against the corresponding axial end surface of the heat sink 611).

The liquid cooling module 610, which is formed by the first end cap 612, the heat sink 611, and the second end cap 613 and can dissipate heat of the housing 1 by using liquid, includes:

positioning the openings of the pair of radial holes 612.4, 612.3 of the first end cap 612 outward, and aligning the side of the first end cap 612 with the first plurality of seal grooves 612.2 with the corresponding axial end surfaces of the heat sink 611, such that the first plurality of seal grooves 612.2 are aligned with one end of the plurality of cooling cavities 611.1, respectively;

respectively pouring sealant into the first seal grooves 612.2, and then fastening the first end cap 612 to the axial end face of the heat sink 611 by a plurality of fixing screws 617;

aligning one side of the second end cap 613, which is provided with the second seal grooves 613.1, with the axial end surface of the other side of the heat sink 611, and aligning the second seal grooves 613.1 with the other ends of the cooling chambers 611.1, respectively;

respectively pouring sealant into the second seal grooves 613.1, and then fastening the second end cap 613 to the axial end surface of the heat sink 611 by the fixing screws 617, so that the first seal grooves 612.2 on the first end cap 612, the cooling cavities 611.1 on the heat sink 611, and the second seal grooves 613.1 on the second end cap 613 are respectively and correspondingly communicated, thereby forming mutually-communicated passages for the circulation of cooling liquid of the heat dissipation module 610;

openings of a pair of radial holes of the first end cover 612 are respectively communicated with a water inlet connector and a water outlet connector, for example, the radial hole 612.4 is in threaded connection with the water outlet connector, and the radial hole 612.3 is in threaded connection with the water inlet connector, so that a water inlet and a water outlet perpendicular to the cooling cavity 611.1 can be formed through the pair of radial holes, and thus, cooling liquid injected by the water inlet connector can flow into the first sealing groove of the first end cover 612 through the water inlet, namely the radial hole 612.3, of the first end cover 612, then flow into the cooling cavity 611.1 inside the cooling fin 611 and the second sealing groove of the second end cover 612, and finally flow out through the water outlet, namely the radial hole 612.4, of the first end cover 612.

As another embodiment, a seal ring may be installed in the first seal groove and the second seal groove, so that the seal effect between the corresponding end cap and the housing 1 is achieved.

Preferably, a pair of axial protrusions 612.1 protruding outward in the axial direction are respectively provided at both ends of the other axial end surface of the first end cap 612 (i.e., the axial end surface facing away from the side of the heat sink), and a pair of radial holes 612.3, 612.4 for water inlet and outlet are respectively provided on the pair of axial protrusions 612.1.

Because the fin 611 is the less arc cylindricality of thickness, adopt and set up the structure that is used for into water and goes out a pair of radial hole 612.3 of water at first end cover 612 both ends, 612.4, can avoid when offering water inlet and delivery port on fin 611, water inlet and delivery port can't design into the open-ended problem of major diameter because of the restriction of fin thickness, consequently, the design of adopting this embodiment can promote the flow of the coolant liquid through the cooling chamber, let more coolant liquid take away the heat on motor casing surface, play the effect of promotion radiating efficiency.

Of course, it is also possible to provide an axial protrusion 612.1 on each of the first and second end caps 612, 613 and a radial hole on each of the axial protrusions, so that the pair of end caps form a water inlet for water and a water outlet for water.

According to the method, every two adjacent heat dissipation modules in the plurality of heat dissipation modules are sequentially and elastically connected together, and the heat dissipation modules can be assembled to form the heat radiator 600 surrounding the periphery of the shell 1.

In order to improve the heat conduction efficiency between the housing 1 and the heat sink 600, a material with good heat conductivity, such as heat-conducting silicone grease, may be applied between the outer wall of the housing 1 and the inner wall of the heat dissipation module, so as to enhance the heat conduction efficiency between the housing 1 and the heat dissipation fins 611, and improve the cooling speed of the housing.

The shell of the embodiment can be cut by steel pipes according to the specification requirement of the motor, so that a plurality of moulds with different specifications do not need to be manufactured, and internal components of the motor, such as the rotor 4, the stator 5 and the like (shown in figure 1) can be arranged in the inner cavity of the shell obtained by cutting the steel pipes. The heat sink 600 is assembled by a plurality of heat dissipation modules 610, and the heat dissipation fins of the heat dissipation modules can be extruded and formed, thereby facilitating the manufacturing process. In addition, a plurality of first end covers and second end covers can be assembled to form an upper end cover 2 and a lower end cover 3 which are respectively connected with two ends of the shell 1, and the junction box 7 is convenient to assemble on the upper end cover 2.

The adjacent radiating fins are connected together through an elastic connection method, so that the distance between the adjacent radiating modules can be automatically adjusted according to the expansion and contraction degree of the motor shell, the radiating fins are prevented from being damaged due to mutual extrusion between the adjacent radiating fins when the motor shell expands with heat, and the service life of the radiator is prolonged. In addition, a plurality of radiating modules are assembled to form the radiator, when one or more radiating modules break down, the radiator is convenient to disassemble, assemble and maintain, or only the radiating module which breaks down needs to be replaced, and the maintenance and purchase cost is reduced.

Example two

The present embodiment provides a method for manufacturing a heat dissipation chassis assembly for a motor, which is different from the first embodiment in that the heat sink of the present embodiment is an air cooling heat sink.

As shown in fig. 6, the heat sink 600 of the present embodiment is formed by splicing a plurality of air-cooled heat dissipation modules 620 with fins, and when the heat dissipation modules are spliced, the adjacent heat dissipation modules are connected by an elastic connection structure. When a plurality of motor housings 1 with different diameters need to be matched, the diameter of an annular body surrounded by the radiator can be adjusted by increasing or decreasing the number of the heat radiation modules 620 in the radiator.

As shown in fig. 6, the air-cooled heat dissipation module 620 includes an arc-shaped plate 621 formed by extruding aluminum material, a heat dissipation fin 622 disposed on the outer wall of the arc-shaped plate 621 and protruding outward in the radial direction, and a pair of connection pieces 627 disposed at two ends of the arc-shaped plate 621, wherein a certain interval is provided between each connection piece 627 and the adjacent heat dissipation fin 622. The connecting piece 627 has a radial end surface opposite to the connecting piece of the adjacent heat dissipation module, a plurality of mounting holes 626 are arranged on the radial end surface of the connecting piece 627, the mounting holes 626 are uniformly distributed along the axial direction of the connecting piece and penetrate through the connecting piece along the thickness direction of the connecting piece 627, and the connecting piece 627 is connected with the connecting piece of the adjacent heat dissipation module through a spring (as shown in fig. 6 a).

Wherein, connect two liang of adjacent heat dissipation modules through the spring and include following step:

the spring 624 is sleeved on the screw 623;

the head end of a screw with a spring passes through a mounting hole on a connecting sheet of one of every two adjacent radiating modules, so that the spring is positioned on the connecting sheet;

the head end of the screw is inserted through the corresponding mounting hole 626 of the other heat dissipation module connection piece and the nut 625 is fastened to the head end of the screw, thereby connecting the two connection pieces together, that is, the adjacent ends of the adjacent two heat dissipation modules together and fastened to the cabinet 1. According to the method, the spring 625 is sleeved on the screw, the spring 625 is positioned between the connecting sheet of the same heat dissipation module and the nearest heat dissipation fin, and the spring can be used for adjusting the distance between the adjacent heat dissipation modules. A certain gap is reserved between the connecting pieces 627 of the two adjacent heat dissipation modules 620, when the shell 1 is heated to expand in the working process, the spring compresses the gap along with the expansion of the shell 1 through the elastic force of the spring 625, so that the damage of the heat dissipation modules caused by the mutual extrusion between the adjacent heat dissipation modules 620 can be avoided, and the service life of the heat dissipation modules, namely the heat radiator, is prolonged.

If a plurality of rows of heat dissipation modules (each row of heat dissipation modules comprises a plurality of heat dissipation modules arranged along the circumferential direction of the housing) need to be arranged outside the housing 1 along the axial direction, in order to improve the connection strength between two adjacent rows of heat dissipation modules 620, the positions of the two adjacent rows of heat dissipation modules matched with the elastic connection structure are staggered. Due to the arrangement, the positions of the heat dissipation module 620 matched with the elastic connection structure are staggered, so that the heat dissipation module 620 is better contacted with the shell 1, and the heat conduction loss caused by the fact that the heat dissipation module 620 is not tightly connected with the shell 1 is reduced.

Similarly, in this embodiment, a material with good thermal conductivity, such as thermal grease, may be coated between the housing 1 and the heat dissipation plate of the heat dissipation module 620, so that the thermal grease fills the gap between the housing 1 and the heat dissipation plate, thereby improving the thermal conductivity between the housing 1 and the heat dissipation plate.

EXAMPLE III

The present embodiment provides a heat dissipation housing assembly for an electric motor, as shown in fig. 2 and 6, the heat dissipation housing assembly of the present embodiment includes:

a shell 1 for placing a cavity of an internal component of the motor is arranged in the shell;

the heat dissipation modules are arranged on the periphery of the shell and can be assembled to form a radiator which surrounds the shell and can dissipate heat of the shell;

the elastic connection structure is used for connecting every two adjacent heat dissipation modules in the plurality of arc-shaped heat dissipation modules together, so that the heat radiator can automatically adapt to the expansion with heat and contraction with cold of the motor shell.

The housing 1 may be formed by cutting a long steel strip as described in the above embodiments, or may be formed by other methods such as casting.

In the heat dissipation chassis assembly of this embodiment, the heat dissipation module may be an air-cooled heat dissipation module 620 (as shown in fig. 6), or may be a liquid-cooled heat dissipation module 610 (as shown in fig. 2 to 4), that is, the heat sink may be an air-cooled heat sink, or may be a liquid-cooled heat sink, or may be another heat sink in the prior art.

When the liquid-cooled heat dissipation module 610 is used as the heat dissipation module, the heat dissipation module 610 includes a heat dissipation plate 611, a first end cap 612 and a second end cap 613 fixed to two axial end surfaces of the heat dissipation plate 611, and a plurality of fixing screws 617 for fixing the first end cap 612 and the second end cap 613 to the axial end surfaces of two sides of the heat dissipation plate 611.

The heat dissipation fins 611 include two types, that is, one type is a plurality of first heat dissipation fins 611a with a screw hole 611.5 (shown in fig. 2) on the radial end surface, and the screw holes 611.5 on the first heat dissipation fins 611a are a plurality and are uniformly arranged along the axial extension direction; and the other is a plurality of second heat radiating fins 611b with assembling holes 611.4 (shown in fig. 3) on the radial end surface, the number of the assembling holes 611.4 on the second heat radiating fins 611b is the same as the number of the threaded holes 611.5, and the positions of the assembling holes 611.4 are corresponding to the positions of the threaded holes 611.5.

Further, a radial hole 611.2 penetrating the thickness of the second heat sink 611b (i.e., penetrating the heat sink in the radial direction of the heat sink) may be further provided in the second heat sink 611b at a position corresponding to each fitting hole 611.4, and the radial hole 611.2 vertically communicates with the fitting hole 611.4 at the corresponding position. Of course, the radial hole may be a sink groove formed on the outer surface of the second fin 611 b.

In design, the screw holes 611.5 may be provided on both radial end surfaces of the second fin 611b, and the fitting holes 611.4 may be provided on both radial end surfaces of the first fin 611 a; the screw holes 611.5 may be provided in the radial end surface of the second fin 611b, the fitting holes 611.4 may be provided in the radial end surface of the second fin 611a, and the fitting holes 611.4 and the screw holes 611.5 may be provided in the radial end surfaces of the first fin 611 a.

When a plurality of arc-shaped heat dissipation modules 610 are arranged on the periphery of the housing, the first heat dissipation fins 611a and the second heat dissipation fins 611b are arranged at intervals, and after the arrangement, two adjacent heat dissipation modules 610 are connected together through a plurality of sets of elastic connection structures, that is, two adjacent first heat dissipation fins 611a and second heat dissipation fins 611b are connected through a plurality of sets of elastic connection structures (the number of the elastic connection structures is the same as that of the screw holes or the assembly holes).

Each set of elastic connection structures includes a spring 616, a spacer 615 and a screw 614, and connecting two adjacent first and second heat sinks 611a and 611b using the elastic connection structures includes:

sleeving a washer 615 and a spring 616 on the screw 614 in sequence;

the head end of the screw 614 with the washer 615 and the spring 616 is inserted through the assembly hole 611.4 of the second heat sink 611b, so that the tail end of the washer 615, the spring 616 and the screw 614 are located at the radial hole 611.2 on the second heat sink 611 b;

after the head end of the screw 614 passes through the fitting hole 611.4 of the second heat sink 611b, the head end is screwed into the screw hole 611.5 at the corresponding position on the first heat sink 611a, so that the two heat sinks can be coupled together.

The first cooling fins and the second cooling fins adjacent to each other on the periphery of the housing 1 are elastically connected together by the elastic connection structure, so that the heat sink 600 surrounding the outside of the housing 1 and capable of dissipating heat from the housing 1 is formed.

When the heat dissipation module 610 is disposed on the outer periphery of the housing 1, in addition to the first and second heat dissipation fins 611a and 611b disposed at intervals on the outer periphery of the housing 1, the first and second end caps 612 and 613 are respectively abutted to a pair of axial end surfaces of each heat dissipation fin, so that the liquid-cooled heat dissipation module 610 capable of dissipating heat from the housing 1 by using liquid is formed by the corresponding first end cap 612, the heat dissipation fins 611 and the second end cap 613.

As shown in fig. 3 and 4, the heat sink 611 (including the first heat sink 611a and the second heat sink 611b) is provided with a plurality of cooling cavities 611.1 parallel to the axial direction thereof, the cooling cavity 611.1 penetrates the axial end faces of both sides of the heat sink 611, a notch 611.3 is provided in the cooling cavity 611.1, and the individual cooling cavities 611.1 in the heat sink 611 are connected in a conductive manner through the notches.

Preferably, the notches 611.3 may be sunken portions respectively provided on axial end surfaces of both ends of the heat sink 611, and the sunken portions on the axial end surfaces are provided at intervals.

Further, as shown in fig. 3 and 5, the first end cap 612 and the second end cap 613 are respectively in a short-piece shape, a plurality of first sealing grooves 612.2 recessed along the axial direction are formed on one axial end surface of the first end cap 612 (i.e., one axial end surface for abutting against the corresponding axial end surface of the heat sink 611), and a pair of radial holes for water inlet or outlet, i.e., a radial hole 612.4 and a radial hole 612.3, extending in the radial direction and respectively communicated with a pair of first sealing grooves 612.2 located at two ends of the plurality of first sealing grooves 612.2, are formed at two ends of the first end cap 612. The pair of radial holes are counter bores, and the opening is arranged on the outer wall of the first end cover.

Further, a plurality of second seal grooves 613.1 recessed in the axial direction are formed in one axial end surface of the second end cap 613 (i.e., one axial end surface for abutting against the corresponding axial end surface of the heat sink 611).

The liquid-cooled heat dissipation module 610 capable of dissipating heat from the housing 1 by using liquid is formed by the first end cap 612, the heat sink 611, and the second end cap 613. In the process of forming the liquid-cooled heat dissipation module, a plurality of first sealing grooves 612.2 of the first end cap and a plurality of second sealing grooves of the second end cap need to be filled with sealing glue, and then the first end cap 612 and the second end cap 613 need to be fastened to two axial end faces of the heat dissipation fin 611 by a plurality of fixing screws 617.

The plurality of first seal grooves 612.2 on the first end cap 612, the plurality of cooling cavities 611.1 on the heat sink 611, and the plurality of second seal grooves 613.1 on the second end cap 613 are respectively and correspondingly communicated with each other, so that mutually-communicated passages of the heat dissipation module 610, through which the cooling liquid can circularly flow, can be formed.

Further, the openings of the pair of radial holes of the first end cap 612 may be respectively communicated with the water inlet joint and the water outlet joint, for example, the radial hole 612.4 is screwed with the water outlet joint, and the radial hole 612.3 is screwed with the water inlet joint, so that a water inlet and a water outlet perpendicular to the cooling chamber 611.1 may be formed by the pair of radial holes, so that the cooling fluid injected from the water inlet joint may flow into the first sealing groove of the first end cap 612 through the water inlet, i.e., the radial hole 612.3, of the first end cap 612, then flow into the cooling chamber 611.1 inside the heat dissipation fin 611 and the second sealing groove of the second end cap 612, and finally flow out through the water outlet, i.e., the radial hole 612.4, of the first end cap 612.

Furthermore, sealing rings can be assembled in the first sealing groove and the second sealing groove, so that the sealing effect between the corresponding end cover and the shell 1 is realized.

Preferably, a pair of axial protrusions 612.1 protruding outward in the axial direction are respectively provided at both ends of the other axial end surface of the first end cap 612 (i.e., the axial end surface facing away from the side of the heat sink), and a pair of radial holes 612.3, 612.4 for water inlet and outlet are respectively provided on the pair of axial protrusions 612.1.

Of course, it is also possible to provide an axial protrusion 612.1 on each of the first and second end caps 612, 613 and a radial hole on each of the axial protrusions, so that the pair of end caps form a water inlet for water and a water outlet for water.

According to the method, every two adjacent heat dissipation modules in the plurality of heat dissipation modules are sequentially and elastically connected together, and the liquid cooling radiator which surrounds the periphery of the shell 1 can be assembled.

Or, when the heat sink is an air-cooled heat sink, as shown in fig. 6, the heat sink is formed by splicing a plurality of air-cooled heat dissipation modules 620 with fins, and when the heat sink is spliced, adjacent heat dissipation modules are connected by an elastic connection structure.

As shown in fig. 6, the air-cooled heat dissipation module 620 includes an arc-shaped plate 621 formed by extruding aluminum material, a heat dissipation fin 622 disposed on the outer wall of the arc-shaped plate 621 and protruding outward in the radial direction, and a pair of connection pieces 627 disposed at two ends of the arc-shaped plate 621, wherein a certain interval is provided between each connection piece 627 and the adjacent heat dissipation fin 622. The connecting piece 627 has a radial end face opposite to the connecting piece of the adjacent heat dissipation module, a plurality of mounting holes 626 are arranged on the radial end face of the connecting piece 627, the mounting holes 626 are uniformly distributed along the axial direction of the connecting piece and penetrate through the connecting piece along the thickness direction of the connecting piece 627, and the connecting piece 627 is connected with the connecting piece of the adjacent heat dissipation module through a spring.

Wherein, an elastic connection structure for forced air cooling radiator includes: the screw 624, the spring 625 and the nut 626, which connect the adjacent heat sink modules together using the elastic connection structure, comprise the following steps:

sleeving the spring on the screw;

the head end of a screw with a spring passes through a mounting hole on a connecting sheet of one of every two adjacent radiating modules, so that the spring is positioned on the connecting sheet;

the head end of the screw is inserted through the corresponding mounting hole 626 of the other heat dissipation module connection piece and the nut is fastened to the head end of the screw, thereby connecting the two connection pieces together, that is, the adjacent ends of the adjacent two heat dissipation modules together and fastened to the cabinet 1.

If a plurality of rows of heat dissipation modules (each row of heat dissipation modules comprises a plurality of heat dissipation modules arranged along the circumferential direction of the housing) need to be arranged outside the housing 1 along the axial direction, in order to improve the connection strength between two adjacent rows of heat dissipation modules 620, the positions of the two adjacent rows of heat dissipation modules matched with the elastic connection structure are staggered. Due to the arrangement, the positions of the heat dissipation module 620 matched with the elastic connection structure are staggered, so that the heat dissipation module 620 is better contacted with the shell 1, and the heat conduction loss caused by the fact that the heat dissipation module 620 is not tightly connected with the shell 1 is reduced.

Further, in order to improve the heat conduction efficiency between the housing 1 and the heat sink 600, a material with good heat conductivity, such as heat-conducting silicone grease, may be coated between the outer wall of the housing 1 and the inner wall of the heat dissipation module, so as to enhance the heat conduction efficiency between the housing 1 and the heat dissipation fins 611 and improve the cooling speed of the housing.

The radiating shell component for the motor is simple in structure, beneficial to production and manufacturing and low in manufacturing cost.

Although the present invention has been described in detail, the present invention is not limited thereto, and those skilled in the art can modify the principle of the present invention, and thus, various modifications made in accordance with the principle of the present invention should be understood to fall within the scope of the present invention.

Claims (5)

1. A method of manufacturing a heat sink housing assembly for an electric machine, comprising:

a straight cylindrical shell with a cavity for accommodating internal components of the motor is formed by cutting a strip-shaped steel pipe;

more than two arc-shaped air-cooled radiating modules are arranged on the periphery of a shell formed by cutting a steel pipe, so that an air-cooled radiator which surrounds the outside of the shell and can radiate the shell is formed by the air-cooled radiating modules;

the air-cooled radiating module comprises an arc-shaped plate formed by arc-shaped extrusion, radiating fins arranged on the outer wall of the arc-shaped plate and protruding outwards along the radial direction, and a pair of connecting pieces arranged at two ends of the arc-shaped plate and used for elastically connecting the air-cooled radiating module with adjacent air-cooled radiating modules together, wherein the connecting pieces are provided with radial end faces opposite to the connecting pieces of the adjacent radiating modules, and a plurality of mounting holes which are uniformly distributed along the axial direction of the connecting pieces and penetrate through the connecting pieces along the thickness direction of the connecting pieces are arranged on the radial end faces of the connecting pieces;

during the process of arranging the arc-shaped air-cooled heat dissipation modules on the periphery of the shell, the spring is sleeved on the screw, then the head end of the screw with the spring penetrates through the mounting hole on the connecting sheet of one heat dissipation module in every two adjacent air-cooled heat dissipation modules, so that the spring is positioned between the connecting sheet on the heat dissipation module and the nearest heat dissipation fin, then the head end of the screw penetrates through the corresponding mounting hole on the connecting sheet of the other heat dissipation module, the nut is fastened at the head end of the screw, and the two adjacent connecting sheets are elastically connected together by a reserved gap;

when the shell is heated to expand in the working process, the spring compresses a gap between the adjacent air cooling heat dissipation modules along with the expansion of the shell through the elastic force of the spring, and the damage of the heat dissipation modules caused by mutual extrusion between the adjacent air cooling heat dissipation modules is avoided.

2. The manufacturing method according to claim 1, further comprising a step of coating a heat conductive material for enhancing heat conduction efficiency between the housing and the air-cooled heat sink.

3. The manufacturing method according to claim 1, further comprising: the pair of axial end faces of each air-cooling heat dissipation module are respectively butted with the first end cover and the second end cover, so that the upper end cover and the lower end cover which are respectively connected with the two ends of the shell are formed by assembling the plurality of first end covers and the plurality of second end covers.

4. A heat sink housing assembly for an electric machine, comprising:

a straight cylindrical shell which is formed by cutting a long steel pipe and is internally provided with a cavity for accommodating internal components of the motor;

the air-cooled radiating modules can be assembled to form an air-cooled radiator which surrounds the outer part of the shell and can radiate the shell;

the air-cooled radiating module comprises an arc-shaped plate formed by arc-shaped extrusion, radiating fins arranged on the outer wall of the arc-shaped plate and protruding outwards along the radial direction, and a pair of connecting pieces arranged at two ends of the arc-shaped plate and used for elastically connecting the air-cooled radiating module with adjacent air-cooled radiating modules together, wherein the connecting pieces are provided with radial end faces opposite to the connecting pieces of the adjacent radiating modules, and a plurality of mounting holes which are uniformly distributed along the axial direction of the connecting pieces and penetrate through the connecting pieces along the thickness direction of the connecting pieces are arranged on the radial end faces of the connecting pieces;

during the process of arranging the arc-shaped air-cooled heat dissipation modules on the periphery of the shell, the spring is sleeved on the screw, then the head end of the screw with the spring penetrates through the mounting hole on the connecting sheet of one heat dissipation module in every two adjacent air-cooled heat dissipation modules, so that the spring is positioned between the connecting sheet of the heat dissipation module and the adjacent heat dissipation fin, then the head end of the screw penetrates through the corresponding mounting hole on the connecting sheet of the other heat dissipation module, the nut is fastened at the head end of the screw, and the two adjacent connecting sheets are elastically connected together by a reserved gap;

when the shell is heated to expand in the working process, the spring compresses a gap between the adjacent air cooling heat dissipation modules along with the expansion of the shell through the elastic force of the spring, and the damage of the heat dissipation modules caused by mutual extrusion between the adjacent air cooling heat dissipation modules is avoided.

5. The heat-dissipating cabinet assembly of claim 4, further comprising a thermally conductive material applied between the housing and the air-cooled heat sink to enhance thermal conductivity therebetween.

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