Cooling jacket device and rotary electric machine

Abstract

The present application provides a cooling jacket device and a rotary electric machine having the cooling jacket device. The cooling jacket device has excellent cooling performance and can be easily manufactured to achieve cost reduction. The cooling jacket device (1) is configured to include: a substantially flat disc-shaped jacket body (3) formed with a flow path (2) that communicates with a pair of inlet and outlet ports (4) opened on the outer surface and through which refrigerant flows inside the flow path (2); a connecting member (5) that matches the outer peripheral shape of a heat generating portion of the rotary electric machine and is used to join and hold a plurality of jacket bodies (3); and a tubular member (6) that is connected to the inlet and outlet ports (4) and is used to deliver refrigerant discharged from the inlet and outlet ports (4) of the jacket body (3) to the flow path (2) via the inlet and outlet ports (4) of another jacket body (3) to make the refrigerant flow through the flow paths (2) of the plurality of jacket bodies (3).

Description

Technical Field

[0001] This invention relates to a cooling jacket device and a rotary motor. Background Technology

[0002] Patent Document 1 discloses the following: "A rotary motor, characterized in that the rotary motor comprises: a housing having a cylindrical portion, wherein a first flow path having an inlet and an outlet is formed inside the cylindrical portion; a stator fixed to the inner circumferential surface of the housing and having a plurality of slits that house coils isolated from a stator core by means of an insulator; a rotor having a gapped arrangement on the inner circumferential surface of the stator; and a cooling shroud having a second flow path connected to the first flow path formed inside the cooling shroud, the cooling shroud being disposed at both ends of the stator in contact with the end faces of the stator core."

[0003] The cooling jacket device of Patent Document 1 is configured such that a flow path is formed by using a metal tube, the metal tube is bent at multiple locations and extended in a manner that is wound around the circumference of the rotating motor, and the metal tube is covered by a plate.

[0004] Patent Document 1: Japanese Patent Application Publication No. 2015-95908 Summary of the Invention

[0005] The problem the invention aims to solve

[0006] However, for the cooling jacket device 100 in Patent Document 1, for example... Figure 7 As shown, since the flow path of the cooling jacket (jacket body) is formed entirely using a metal tube 101, the cooling jacket (jacket body) part becomes shaped along the outline of a rotating motor such as an electric motor, which makes it difficult to install on the electric motor.

[0007] In addition, since the structure uses plate 102 to enclose metal tube 101, a gap is generated between metal tube 101 and plate 102, which causes a decrease in cooling efficiency (heat exchange efficiency).

[0008] Solution for solving the problem

[0009] One technical solution of the cooling jacket device disclosed herein is a cooling jacket device disposed around the heating part of a rotating electric motor for cooling the heating part. The cooling jacket device is configured to include: a generally flat disc-shaped jacket body having a flow path that communicates with a pair of inlets and outlets formed by openings on the outer surface, allowing refrigerant to flow inside the flow path; a connecting member that matches the outer peripheral shape of the heating part of the rotating electric motor for connecting and holding multiple jacket bodies; and a tubular member connected to the inlets and outlets for conveying the refrigerant discharged from the inlets and outlets of the jacket body to the flow path via the inlets and outlets of another jacket body, thereby allowing the refrigerant to flow through the flow paths of multiple jacket bodies.

[0010] For the aforementioned cooling jacket device, the jacket body may also be formed in a separable manner by including the following components: a main plate portion, which is formed in a generally flat plate shape and has a groove recessed from one surface to the other surface; and a closing plate portion, which is formed in a generally flat plate shape and is detachably overlapped on one surface of the main plate portion and installed integrally with the main plate portion, the closing plate portion closing the groove opening on one surface of the main plate portion and forming the flow path together with the main plate portion.

[0011] For the aforementioned cooling jacket device, the flow path formed by the groove of the main body plate can also be formed into a reverse square spiral shape, in which the clockwise flow path portion and the reverse flow path portion are connected near the center of the main body plate. The clockwise flow path portion is formed into a square spiral shape that rolls in clockwise or counterclockwise from the refrigerant supply port, i.e., the inlet / outlet, toward the center of the main body plate. The reverse flow path portion is formed into a square spiral shape that turns back from the flow terminal portion of the flow path that is the clockwise flow path portion, i.e., near the center of the main body plate, and rolls out in a reverse square spiral shape in counterclockwise or clockwise direction to the refrigerant discharge port, i.e., the inlet / outlet.

[0012] One technical solution of the rotating electric machine disclosed herein is configured to include the aforementioned cooling jacket device.

[0013] The effects of the invention

[0014] According to a technical solution of this disclosure, a cooling jacket device and a rotary motor equipped with the cooling jacket device are provided. Since there is no metal pipe in the connecting part of the jacket body of the cooling jacket device, it is easy to install the device relative to a rotary motor such as an electric motor.

[0015] In addition, since there are no gaps as in the previous cases where metal tubes were used, the cooling efficiency can be greatly improved.

[0016] Furthermore, it eliminates the need for metal tubes, thus avoiding the cumbersome processes of inserting tubes into the plate and bending metal tubes. This facilitates the fabrication and manufacturing of cooling jacket devices, reduces the number of parts, and improves economic efficiency. Attached Figure Description

[0017] Figure 1 This is a perspective view showing a cooling jacket device according to one embodiment of the present disclosure.

[0018] Figure 2A This is a perspective view showing the jacket body (flow path forming surface side of the body disk) of a cooling jacket device according to an embodiment of the present disclosure.

[0019] Figure 2B This is a perspective view of the jacket body (outer surface side of the main body disk) of a cooling jacket device according to an embodiment of the present disclosure.

[0020] Figure 3 This is a perspective view showing the jacket body (closed disc portion) of a cooling jacket device according to one embodiment of the present disclosure.

[0021] Figure 4 This is an exploded perspective view of the jacket body of a cooling jacket device according to another embodiment of the present disclosure.

[0022] Figure 5A This diagram illustrates the effect of the jacket body in the comparative reference example.

[0023] Figure 5B It is used for explanation Figure 4 The diagram illustrates the function and effect of the jacket body.

[0024] Figure 6A This is a diagram showing the shape of the flow path of the jacket body in Figure 2.

[0025] Figure 6B It means Figure 4 A diagram showing the morphology of the flow path of the jacket body.

[0026] Figure 7 This is a perspective view of a conventional cooling jacket device.

[0027] Explanation of reference numerals in the attached figures

[0028] 1. Cooling jacket assembly; 2. Flow path 20; 2a. Straight section; 2b. Connecting section; 3. 30. Jacket body (cooling jacket); 3a, 30a. Main body disc section; 3b, 30b. Closed disc section; 4. Inlet / outlet (refrigerant supply port, refrigerant discharge port); 5. Connecting structural component; 6. 6a, 6b. Hose (tubular component); 7. 7a, 7b. Hose connector; 21. Forward flow path section; 22. Reverse flow path section; 32. End. Detailed Implementation

[0029] The following is for reference Figures 1 to 3 The cooling jacket device and the rotary motor of one embodiment will be described. In this embodiment, the rotary motor is described as an electric motor, but other forms of rotary motors such as generators can also be used.

[0030] For example Figure 1 , Figure 2A , Figure 2B , Figure 3 As shown, the cooling jacket device 1 of this embodiment is made of a metal with high thermal conductivity and is formed in a generally flat disc shape. The cooling jacket device 1 includes a plurality of jacket bodies (cooling jackets) 3. Each jacket body 3 has a flow path 2 for the flow of refrigerant such as cooling water inside, and has a refrigerant supply port (inlet / outlet 4) and a refrigerant discharge port (inlet / outlet 4) at its end. Refrigerant is supplied to the flow path 2 from the refrigerant supply port (inlet / outlet 4), and the refrigerant that has flowed through the flow path 2 from the refrigerant supply port (inlet / outlet 4) is discharged.

[0031] like Figure 2A As shown, the flow path 2 is formed in a meandering shape along a surface of the jacket body 3 that contacts the outer peripheral surface of the heating part of the rotary motor. That is, a plurality of straight sections 2a extending in one direction and arranged in parallel with minimal spacing are connected to form a flow path 2 by means of connecting sections 2b, where one end of adjacent straight sections 2a is alternately connected to each other and the other end is connected to each other. As a result, the contact area between the refrigerant, which is the surface area of ​​the flow path 2, and the jacket body 3 can be maximized, thereby improving the heat exchange efficiency.

[0032] In addition, one end of the flow path 2 opens on the outer surface of the jacket body 3 to form a refrigerant supply port (4), and the other end of the cooling flow path 2 opens on the outer surface of the jacket body 3 to form a refrigerant discharge port (4). Figure 2A , Figure 2B ).

[0033] In this embodiment, the jacket body 3 of the cooling jacket device 1 is made of a metal with high thermal conductivity, such as aluminum or copper. The jacket body 3 is formed in a generally flat disc shape, including a groove that is recessed from one surface to the other along the thickness direction and forms a flow path 2 (a plurality of straight portions 2a and a plurality of connecting portions 2b). The refrigerant supply port (4) and the refrigerant discharge port (4) communicate with the groove and are open on the outer surface. The main body disc portion 3a is formed by having the flow path 2, the refrigerant supply port (4) and the refrigerant discharge port (4). Figure 2A , Figure 2B Additionally, a closed disk portion 3b is formed in a roughly flat disk shape. Figure 3 The main body 3a is detachably overlapped with one surface of the main body 3a and integrally mounted with the main body 3a. The closed disc 3b closes / seales the groove opening on one surface of the main body 3a, thus forming the flow path 2. The jacket body 3, composed of the main body 3a and the closed disc 3b, is formed as multiple parts of the same mold and constitutes the cooling jacket device 1. Furthermore, the jacket body 3 does not necessarily need to be formed in sections, and can be formed into three or more sections. In addition, the connection between the main body 3a and the closed disc 3b uses a metal gasket or the like to reliably close / seale the flow path 2.

[0034] Furthermore, the cooling jacket device 1 of this embodiment is constructed by connecting multiple jacket bodies 3 using connecting members 5. That is, it is configured such that a hose 6 of the tubular member of the refrigerant supply unit is connected to the refrigerant supply port (4) of one jacket body 3, a hose 6 of the cooling discharge unit is connected to the refrigerant discharge port (4) of another jacket body 3, and the remaining adjacent jacket bodies 3 are connected to the refrigerant supply port (4) and the refrigerant discharge port (4) using hose 6. In addition, a hose connector 7 for connecting the hose 6 is installed in a detachable manner at each refrigerant supply port (4) and each refrigerant discharge port (4).

[0035] In this embodiment of the above-described structure, the cooling jacket device 1 and the rotary motor equipped with the cooling jacket device 1 are arranged such that the contact surfaces of the multiple jacket bodies 3, which are respectively mounted on the side of the segmented connecting member 5, are in contact with the outer peripheral surface of the heating part of the rotary motor such as the motor. Furthermore, the multiple jacket bodies 3 are fixed in their respective predetermined positions by connecting the segmented connecting member 5.

[0036] In addition, a hose 6 for a refrigerant supply unit is connected to the refrigerant supply port (4) of one jacket body 3, and a hose 6 for a refrigerant discharge unit is connected to the refrigerant discharge port (4) of another jacket body 3. The remaining adjacent jacket body 3 refrigerant supply ports (4) and refrigerant discharge ports (4) are connected by hose 6.

[0037] When refrigerant, such as cooling water, is supplied through the hose 6 connected to the refrigerant supply port (4), the refrigerant flows into the flow path 2 of the jacket body 3 of the cooling jacket device 1. The refrigerant discharged from the refrigerant outlet (4) passes through the hose 6 and is conveyed to the refrigerant supply port (4) of the next jacket body 3, and flows through the flow path 2 of that jacket body 3. The refrigerant that flows through the flow path 2 of multiple jacket bodies 3 in sequence and is discharged from the refrigerant outlet (4) of the last jacket body 3 passes through the hose 6 and is conveyed to the heat exchanger. The refrigerant is cooled by heat exchange and is conveyed again through the hose 6 to the refrigerant supply port (4) of the jacket body 3. In this way, the refrigerant circulates and the rotary motor is cooled.

[0038] Furthermore, the hose 6 is preferably made of fluororesin and has excellent flexibility. Using such a flexible hose 6 ensures good operability during installation of the hose 6 and during installation relative to the rotary motor.

[0039] Furthermore, compared to the conventional method, the cooling jacket device 1 and the rotary motor of this embodiment are easier to install relative to a rotary motor such as an electric motor because there is no metal pipe in the connecting part and the jacket body 3 is formed in a generally flat disc shape.

[0040] In addition, since the gaps that existed in the past are not generated, the cooling efficiency can be greatly improved.

[0041] Furthermore, since no metal tubes are used, the previously cumbersome processes of inserting tubes into the plate and bending metal tubes are eliminated. As a result, manufacturing can be carried out easily.

[0042] Therefore, the cooling jacket device 1 and the rotary motor according to this embodiment can achieve a cooling jacket device 1 with excellent cooling performance, which can be easily manufactured and has low cost.

[0043] Next, refer to Figure 4 This invention describes a cooling jacket device as another embodiment of the present disclosure.

[0044] Figure 4In the exploded perspective view, the jacket body 30 of the cooling jacket device is configured such that a generally flat, closed disc portion 30b is joined to a generally flat, main disc portion 30a in a detachable manner. A groove constituting a flow path 20 is formed at a certain depth along the thickness direction on one surface side of the main disc portion 30a. The planar projection shapes of the main disc portion 30a and the closed disc portion 30b are identical. The closed disc portion 30b is joined relative to the main disc portion 30a such that its outer periphery exactly coincides with the outer periphery of the main disc portion 30a, thereby sealing the groove in the main disc portion 30a and forming a flow path 20 inside the main disc portion 30a.

[0045] A square annular seal 25 is sandwiched near the outer periphery of the mating surface between the main disc portion 30a and the closed disc portion 30b. The annular seal 25 is made of a material with excellent heat resistance, oil resistance, mechanical strength, and resistance to compression set, such as HNBR (hydrogenated nitrile butadiene rubber).

[0046] Furthermore, the jacket body 30 is connected by connecting structural members to form a cooling jacket device, which is similar to the implementation method used in rotating electric machines. Figure 1 The cooling jacket device 1 disclosed is substantially the same, therefore it is cited. Figure 1 Explanation.

[0047] for Figure 4 The shape of the groove (hereinafter also referred to as the flow path) forming the flow path 20 of the jacket body 30, the main body disk portion 30a, is similar to... Figure 2A The jacket body 3 is different. That is, as already explained, Figure 2A The flow path 2 of the main body disk 3a of the jacket body 3 is formed in a meandering shape. In contrast, Figure 4 The flow path 20 of the main body disk portion 30a of the jacket body 30 is formed in a reverse square spiral shape as shown in the figure. That is, the flow path 20 is formed by connecting the forward flow path portion 21 and the reverse flow path portion 22 near the center of the main body disk portion 30a. The forward flow path portion 21 is formed in a square spiral shape that rolls in from the refrigerant supply port (4) toward the center of the main body disk portion 30a in a clockwise direction (counterclockwise direction). The reverse flow path portion 22 is formed in a square spiral shape that turns back from the flow terminal portion of the flow path that is the forward flow path portion 21, i.e., near the center of the main body disk portion 30a, and rolls out in a square spiral shape that reverses in a counterclockwise direction (clockwise direction) to the refrigerant discharge port (4). The above-described reverse square spiral flow path 20 is formed with a uniform width from near the refrigerant supply port to near the refrigerant discharge port.

[0048] Next, refer to the accompanying drawings for explanation. Figure 4 The effect of the jacket body 30. Figure 5A This diagram illustrates the effect of the jacket body in the comparative reference example. Figure 5BIt is used for explanation Figure 4 The diagram illustrates the function and effect of the jacket body.

[0049] exist Figure 5A In the comparative reference example, the jacket body 300 is constructed by joining a generally flat, closed disc portion 300b to the main surface side of a generally flat, disc-shaped main body portion 300a with their outer edges overlapping. Therefore, the thickness d3 of the jacket body 300 is obtained by adding the thickness d1 of the main body portion 300a to the thickness d2 of the closed disc portion 300b. It is required that the thickness d3 of the jacket body 300 be as small as possible and as thin as possible. Therefore, the thickness d1 of the main body portion 300a for threaded connection of the hose connector 7a for connecting the hose 6a is constrained. Consequently, a relatively small diameter hose connector 7a and hose 6a must be used.

[0050] In contrast, for Figure 4 In the case of the jacket body 30, such as Figure 5B Thus, the main body disk portion 30a, with a thickness dimension d3 at the end 32, has a recess 31 formed in a stepped manner with a depth corresponding to the thickness dimension d2 of the closed disk portion 30b. The thickness dimension d1 is formed at the bottom of the recess 31 of the main body disk portion 30a with a depth d2 along the thickness direction. Therefore, when the main body disk portion 30a and the closed disk portion 30b are joined together, the closed disk portion 30b is housed in the recess 31, and its thickness dimension d2 does not increase the thickness dimension d3 of the jacket body 30. On the other hand, regarding the end 32 of the main body disk portion 30a, the thickness dimension d3 of the main body disk portion 30a remains unchanged, thus maintaining the thickness dimension d3 of the jacket body 30. In other words, at the end 32 of the main body disk portion 30a, the joining of the closed disk portion 30b does not cause an increase in the thickness dimension of the jacket body 30, therefore, it does not hinder thinning, and there is no need to limit the thickness dimension. Therefore, by ensuring sufficient thickness at the end 32 of the main body plate 30a, a relatively large-diameter hose connector 7b can be connected, and thus a relatively large-diameter hose 6b can be used. This reduces pressure loss during refrigerant circulation, resulting in a cooling jacket device with excellent cooling efficiency.

[0051] Next, refer to Figure 6A and Figure 6B Explain the shape of the flow path of the jacket body and its effect. Figure 6A Indicates reference Figure 1 , Figure 2A as well as Figure 2B The shape of the flow path formed by the main body disk 3a of the jacket body 3 is explained. Figure 6B Indicates in Figure 4 The shape of the flow path formed by the main body disk 30a of the jacket body 30.

[0052] for Figure 6A In the case of the main body disc 3a, a flow path 2 is formed by six straight sections 2a and five connecting sections 2b that connect the ends of adjacent straight sections 2a to each other. The five connecting sections 2b form U-shaped reversing sections P1-P5 that change the direction of refrigerant flow by 180 degrees. Therefore, the pressure loss from the refrigerant supply port to the refrigerant discharge port is relatively large.

[0053] exist Figure 6B In the example, the flow path 20 of the main body disk 30a, as already described, is formed in a reverse square spiral shape, where the forward-rotating flow path portion 21 and the reverse-rotating flow path portion 22 are connected near the center of the main body disk 30a. The forward-rotating flow path portion 21 is formed from... Figure 6B The left-side inlet / outlet 4, i.e., the refrigerant supply port, is wound into the center O of the main body plate 30a in a clockwise square spiral shape. The reverse flow path 22 is formed from the flow terminal of the flow path that is the forward flow path 21, i.e., near the center O of the main body plate 30a, and is wound out in a counterclockwise square spiral shape to the inlet / outlet 4, i.e., the refrigerant discharge port.

[0054] That is, the flow terminal of the forward flow path section 21 is the flow starting point of the reverse flow path section 22, and this point is the center O. The forward flow path section 21, from the refrigerant supply port, forms a U-shaped reversing section P11 at a bend with a bending angle of less than 90 degrees, immediately before the flow terminal (O), which reverses the direction of refrigerant flow by 180 degrees. Similarly, the reverse flow path section 22 forms a U-shaped reversing section P11 at the bend closest to the flow starting point (O), which reverses the direction of refrigerant flow by 180 degrees, and then reaches the refrigerant discharge port via multiple bends with bending angles of less than 90 degrees. Thus, in Figure 6B In the example, the U-shaped reversal sections P11 and P12, which have a dominant influence on the pressure loss in the flow path from the refrigerant supply port to the refrigerant discharge port, are only two locations. Therefore, compared with... Figure 6A Compared to the previous method, the pressure loss from the refrigerant supply port to the refrigerant discharge port is smaller. Furthermore, the reverse square spiral flow path 20 is formed with a uniform width from near the refrigerant supply port to near the refrigerant discharge port, including the U-shaped return sections P11 and P12. Therefore, so-called continuous processing is possible, resulting in a shorter production cycle time in manufacturing.

[0055] Moreover, in Figure 4In this embodiment, the following effects are achieved: The annular seal 25, located near the outer periphery of the mating surface between the main body disc 30a and the closed disc 30b, is made of a material with excellent heat resistance, oil resistance, mechanical strength, and resistance to compression set, such as HNBR (hydrogenated nitrile butadiene rubber). Therefore, compared to using a metal gasket as the annular seal 25, it exhibits better conformability to deformation relative to the closed disc 30b. Thus, it is unnecessary to use a thicker closed disc 30b to ensure rigidity. Furthermore, it is unnecessary to use a larger threaded part for engaging the main body disc 30a and the closed disc 30b, and it is unnecessary to increase the number of threaded parts. Therefore, cost reduction is possible.

[0056] The above describes the implementation of the cooling jacket device and the rotary motor. However, the present invention is not limited to the above implementation and can be appropriately modified without departing from its spirit.

[0057] For example, in Figure 1 In the embodiment shown, a cooling jacket device 1 is illustrated, which has four jacket bodies 3 that respectively contact four portions of the outer peripheral surface of the heating part of the rotary motor. However, the number and arrangement of the jacket bodies 3 can be determined according to the shape of the rotary motor (the shape of the outer peripheral surface of the heating part (the number of planar portions)) and cooling efficiency. For example, if the outer peripheral surface of the heating part of the rotary motor has seven planar portions, the cooling jacket device 1 can be configured with seven jacket bodies 3 that contact each planar portion.

Claims

1. A cooling jacket device, disposed around the heating element of a rotating electric motor for cooling the heating element, characterized in that, The cooling jacket assembly includes: The jacket body is roughly flat and disc-shaped, and has a flow path that communicates with a pair of inlets and outlets formed by openings on the outer surface, allowing refrigerant to flow inside the flow path. A connecting structural member, whose shape matches the outer periphery of the heating element of the rotary motor, is used to connect and hold the plurality of said jacket bodies; and A flexible hose, a tubular component connected to the inlet / outlet, is used to transport the refrigerant discharged from the inlet / outlet of one jacket body to the flow path via the inlet / outlet of another jacket body, thereby allowing the refrigerant to flow through the flow paths of the plurality of jacket bodies. The jacket body is formed in a divisible manner, comprising the following components: The main body is a disc-shaped portion, which is generally flat and has a groove recessed from one surface to the other; and The closed disc portion, which is formed in a generally flat disc shape, overlaps with one surface of the main disc portion in a detachable manner and is integrally mounted with the main disc portion. The closed disc portion closes a groove that opens on one surface of the main disc portion, and together with the main disc portion, forms the flow path. The main body disk has recesses of a stepped depth corresponding to the thickness of the closing disk on the inner side of each of its opposite ends. When the closing disk is aligned with the recesses and the main body disk and the closing disk are joined together, the closing disk is housed within the recesses in a dimensional relationship. A columnar hose connector for connecting the hose protrudes from the outer surface of the end opposite to the recess. The hose connector extends in such a manner that its outer diameter exceeds the size obtained by subtracting the thickness of the recess from the thickness of the main body disc, and the outer peripheral portion of the hose connector extends beyond a position on the outer surface of the end that corresponds to the bottom position of the recess.

2. The cooling jacket device according to claim 1, characterized in that, The flow path formed by the groove in the main body disk is configured as a reverse square spiral shape, in which the forward flow path portion and the reverse flow path portion are connected near the center of the main body disk. The forward-rotating flow path is formed in a square spiral shape, spiraling in either a clockwise or counterclockwise direction from the refrigerant supply port (i.e., the inlet / outlet) toward the center of the main body panel. The reverse flow path portion is formed from the flow terminal portion of the flow path that is the forward flow path portion, i.e., near the center of the main body plate portion, turning back and spiraling out in a square spiral shape in either a counterclockwise or clockwise direction to the refrigerant discharge port, i.e., the inlet / outlet.

3. A rotary electric motor, characterized in that, The rotary motor includes the cooling jacket device as described in claim 1 or 2.

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