CN112467911A - Rotating shaft structure and driving motor - Google Patents
Rotating shaft structure and driving motor Download PDFInfo
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- CN112467911A CN112467911A CN202011172132.4A CN202011172132A CN112467911A CN 112467911 A CN112467911 A CN 112467911A CN 202011172132 A CN202011172132 A CN 202011172132A CN 112467911 A CN112467911 A CN 112467911A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/32—Rotating parts of the magnetic circuit with channels or ducts for flow of cooling medium
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/003—Couplings; Details of shafts
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/19—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
- H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Motor Or Generator Cooling System (AREA)
Abstract
The invention relates to a rotating shaft structure and a driving motor. The guide member is sleeved in the shaft body, so that the problem that a cooling system is difficult to install due to the rotation of the rotor is solved. Simultaneously, arrange into the cooling intracavity with the coolant by the water conservancy diversion intracavity through the water conservancy diversion spare for the coolant is by middle to lasting flow all around, guarantees that the coolant in the cooling intracavity is in mobile state all the time, strengthens the heat exchange efficiency between coolant and the axle body, improves the cooling effect of rotor. In addition, this pivot structure endotheca water conservancy diversion spare for form the multilayer heat transfer interface in the cooling chamber, through the multilayer heat transfer interface, prolonged the effective dwell time of coolant at this internal in axle, guarantee that the coolant carries out abundant heat transfer, further improve the cooling effect of rotor. In addition, the shaft body and the flow guide piece are both designed in a hollow mode, so that the whole weight of the rotating shaft structure is effectively reduced, and the requirement of high power density of a driving motor is met.
Description
Technical Field
The invention relates to the technical field of motors, in particular to a rotating shaft structure and a driving motor.
Background
With the development of new energy automobile driving motors, the power density of the motors is higher and higher, the temperature rise requirements of the motors are more and more strict, and the requirements of cooling systems of the motors are also more and more strict. At present, a new energy motor cooling system is still only concentrated on stator cooling, and because a rotor is a rotating body and is limited by the defects of the structural design of the traditional rotor, the difficulty of adding the cooling system on the rotor is high, and therefore, the problem of rotor cooling cannot be effectively solved all the time.
Disclosure of Invention
Therefore, a rotating shaft structure and a driving motor are needed to be provided, so that a stable cooling effect is achieved, and the heat dissipation problem of the rotor is effectively solved.
A hinge structure, comprising: the cooling shaft comprises a shaft body, wherein a cooling cavity is arranged in the shaft body, an introducing port and an outlet port are arranged on the shaft body at intervals, and the outlet port is communicated with the cooling cavity; the guide piece is sleeved in the shaft body, a guide cavity is arranged in the guide piece, a flow inlet and a drainage hole which are communicated with the guide cavity are arranged on the guide piece, the flow inlet is communicated with the introducing port, and the drainage hole is communicated with the cooling cavity.
In the rotating shaft structure, in the cooling process, the coolant is introduced from the inlet, so that the coolant flows into the flow guide cavity in the flow guide piece from the inlet; then, the coolant flowing into the flow guide cavity flows into the cooling cavity from the drainage hole, and at the moment, the coolant is fully contacted with the shaft body, so that the temperature on the shaft body is reduced, the heat generated by the rotor is effectively transferred to the shaft body, and the stable cooling of the rotor is realized; finally, the coolant flowing into the cooling cavity is discharged out of the shaft body through the outlet hole, and the external part is cooled. The guide member is sleeved in the rotating shaft structure, so that the problem that a cooling system is difficult to install due to the rotation of the rotor is solved. Simultaneously, arrange into the cooling chamber with the coolant by the water conservancy diversion intracavity through the water conservancy diversion spare for the coolant is by middle to lasting flow all around, guarantees that the coolant in the cooling chamber is in the mobile state all the time, strengthens the heat exchange efficiency between coolant and the axle body, improves the cooling effect of rotor, avoids directly leading to the coolant to the cooling intracavity and leading to partial coolant to be in the non-mobile state all the time. In addition, this pivot structure endotheca water conservancy diversion spare for form multilayer heat transfer interface in the cooling chamber, if: a heat exchange interface between the coolant in the flow guide cavity and the flow guide piece, a heat exchange interface between the flow guide piece and the coolant in the cooling cavity, a heat exchange interface between the coolant in the cooling cavity and the shaft body and the like. Therefore, through the multilayer heat exchange interfaces, the effective residence time of the coolant in the shaft body is prolonged, the coolant is ensured to perform sufficient heat exchange, and the cooling effect of the rotor is further improved. In addition, the axle body and the water conservancy diversion spare of this application are hollow design, consequently, under the prerequisite that satisfies the effective cooling of rotor, also effectively alleviate the whole weight of pivot structure, satisfy driving motor's high power density requirement.
In one embodiment, the flow guide divides the cooling cavity into a first split cavity and a second split cavity distributed along the length direction of the shaft body, the inflow port is communicated with the introduction port through the first split cavity, the drainage hole is positioned in the second split cavity and communicated with the second split cavity, and the outflow hole is communicated with the second split cavity.
In one embodiment, the drainage holes and the guide-out holes are distributed in a staggered manner in the length direction of the shaft body.
In one embodiment, the exit orifice is located on a side of the second body cavity that is closer to the first body cavity, and the drainage orifice is located on a side of the second body cavity that is further from the first body cavity.
In one embodiment, one end of the flow guide part with the flow inlet is in interference fit with the wall of the cooling cavity, and the end of the flow guide part divides the cooling cavity into the first cavity and the second cavity.
In one embodiment, the flow guide element is sleeved with a first sealing element, and the flow guide element is in sealing fit with the cavity wall of the cooling cavity through the first sealing element.
In one embodiment, the rotating shaft structure further includes a cover, a first port is disposed on one end of the shaft body away from the inlet, a second port is disposed on one end of the flow guide member away from the inlet, the second port is opposite to the first port, and the cover seals the first port and the second port.
In one embodiment, one end of the flow guide part with the second port is in interference fit with the inner side wall of the first port, and the cover is in interference fit with the inner side wall of the first port and blocks the second port.
In one embodiment, the wall thickness h between the outer surface of the shaft body and the wall of the cooling cavity varies by-10 mm to 10mm along the length of the shaft body.
A driving motor comprises a rotor, a stator and any one of the above rotating shaft structures, wherein the rotor is arranged on a shaft body, and the rotor is sleeved with the stator to be matched.
The above-mentioned driving motor, adopt the above-mentioned spindle structure, in the course of cooling, introduce the coolant from introducing the entrance, make the coolant flow into the flow guide cavity in the flow guide from the inflow entrance; then, the coolant flowing into the flow guide cavity flows into the cooling cavity from the drainage hole, and at the moment, the coolant is fully contacted with the shaft body, so that the temperature on the shaft body is reduced, the heat generated by the rotor is effectively transferred to the shaft body, and the stable cooling of the rotor is realized; finally, the coolant flowing into the cooling cavity is discharged out of the shaft body through the outlet hole, and the external part is cooled. The guide member is sleeved in the rotating shaft structure, so that the problem that a cooling system is difficult to install due to the rotation of the rotor is solved. Simultaneously, arrange into the cooling chamber with the coolant by the water conservancy diversion intracavity through the water conservancy diversion spare for the coolant is by middle to lasting flow all around, guarantees that the coolant in the cooling chamber is in the mobile state all the time, strengthens the heat exchange efficiency between coolant and the axle body, improves the cooling effect of rotor, avoids directly leading to the coolant to the cooling intracavity and leading to partial coolant to be in the non-mobile state all the time. In addition, this pivot structure endotheca water conservancy diversion spare for form multilayer heat transfer interface in the cooling chamber, if: a heat exchange interface between the coolant in the flow guide cavity and the flow guide piece, a heat exchange interface between the flow guide piece and the coolant in the cooling cavity, a heat exchange interface between the coolant in the cooling cavity and the shaft body and the like. Therefore, through the multilayer heat exchange interfaces, the effective residence time of the coolant in the shaft body is prolonged, the coolant is ensured to perform sufficient heat exchange, and the cooling effect of the rotor is further improved. In addition, the axle body and the water conservancy diversion spare of this application are hollow design, consequently, under the prerequisite that satisfies the effective cooling of rotor, also effectively alleviate the whole weight of pivot structure, satisfy driving motor's high power density requirement.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention.
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic view of a spindle structure according to an embodiment;
FIG. 2 is an enlarged view of the structure of FIG. 1 at the position of the frame A;
fig. 3 is an enlarged schematic view of the structure at the frame B in fig. 1.
100. A rotating shaft structure; 110. a shaft body; 111. a cooling chamber; 1111. a first molecular cavity; 1112. a second lumen; 112. an inlet port; 113. a lead-out hole; 114. a first port; 120. a flow guide member; 121. a flow guide cavity; 122. an inflow port; 123. a drainage aperture; 124. a second port; 130. and (7) sealing the cover.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.
In an embodiment, referring to fig. 1, fig. 2 and fig. 3, a hinge structure 100 includes: a shaft body 110 and a flow guide 120. A cooling cavity 111 is provided in the shaft body 110. The shaft body 110 is provided with an inlet 112 and an outlet 113 at an interval. The lead-out hole 113 communicates with the cooling chamber 111. The flow guiding member 120 is sleeved in the shaft body 110, a flow guiding cavity 121 is arranged in the flow guiding member 120, and an inflow port 122 and an exhaust hole 123 both communicated with the flow guiding cavity 121 are arranged on the flow guiding member 120. The inlet 122 communicates with the inlet 112. The drainage apertures 123 communicate with the cooling cavity 111.
In the rotating shaft structure 100, during the cooling process, the coolant is introduced from the introduction port 112, so that the coolant flows into the flow guide cavity 121 in the flow guide member 120 from the inflow port 122; then, the coolant flowing into the diversion cavity 121 flows into the cooling cavity 111 from the drainage hole 123, and at this time, the coolant is fully contacted with the shaft body 110, so that the temperature on the shaft body 110 is reduced, the heat generated by the rotor is effectively transferred to the shaft body 110, and the stable temperature reduction of the rotor is realized; finally, the coolant flowing into the cooling chamber 111 is discharged from the shaft body 110 through the outlet hole 113, and the outside member is cooled. The guide member 120 is sleeved in the rotating shaft structure 100, so that the problem that a cooling system is difficult to install due to the rotation of the rotor is solved. Meanwhile, the coolant is discharged into the cooling cavity 111 from the inside of the flow guide cavity 121 through the flow guide piece 120, so that the coolant continuously flows from the middle to the periphery, the coolant in the cooling cavity 111 is always in a flowing state, the heat exchange efficiency between the coolant and the shaft body 110 is increased, the cooling effect of the rotor is improved, and the situation that part of the coolant is always in a non-flowing state due to the fact that the coolant is directly led into the cooling cavity 111 is avoided. In addition, the diversion member 120 is sleeved in the rotating shaft structure 100, so that a multi-layer heat exchange interface is formed in the cooling cavity 111, as follows: a heat exchange interface between the coolant in the guide chamber 121 and the guide member 120, a heat exchange interface between the guide member 120 and the coolant in the cooling chamber 111, a heat exchange interface between the coolant in the cooling chamber 111 and the shaft body 110, and the like. Therefore, through the multilayer heat exchange interfaces, the effective residence time of the coolant in the shaft body 110 is prolonged, the coolant is ensured to perform sufficient heat exchange, and the cooling effect of the rotor is further improved. In addition, the shaft body 110 and the flow guide piece 120 of the present application are both hollow, and therefore, on the premise of satisfying effective cooling and cooling of the rotor, the overall weight of the rotating shaft structure 100 is also effectively reduced, and the requirement of high power density of the driving motor is satisfied.
The present embodiment is not particularly limited, as various modes of communication between the inlet 122 and the inlet 112 are possible. For example: one end of the flow guide piece 120 with the inflow port 122 is in interference fit in the cooling cavity 111, and the inflow port 122 is arranged opposite to the introduction port 112; alternatively, the entire guide member 120 is positioned in the cooling chamber 111, and the inflow port 122 and the introduction port 112 are hermetically communicated with each other by a pipe; still alternatively, the end of the flow guide 120 having the inflow opening 122 is just interference-fitted on the wall of the introduction opening 112; of course, the end of the baffle 120 having the inlet 122 may extend out of the inlet 112, in which case, the inlet 112 and the inlet 122 may be indirectly connected, and the coolant may be directly introduced into the inlet 122 during the cooling process.
Optionally, the coolant is at least one of water, oil, glycol, and the like, wherein the coolant may be a monomer liquid or a mixed liquid of a plurality of monomers. Meanwhile, the external part can be a bearing, a speed reducer and other equipment.
Further, referring to fig. 2, the flow guide 120 divides the cooling chamber 111 into a first sub-chamber 1111 and a second sub-chamber 1112 distributed along the length direction of the shaft body 110. The inlet 122 communicates with the inlet 112 through the first divided chamber 1111. The drainage aperture 123 is positioned within the second body cavity 1112 and is in communication with the second body cavity 1112, and the exit aperture 113 is in communication with the second body cavity 1112. Therefore, when the coolant flows in from the inlet 112, the coolant first flows into the first sub-chamber 1111 to cool part of the shaft main body 110; then, the coolant enters the inflow port 122 from the first split cavity 1111, so that the coolant can enter the flow guide 120; finally, the coolant enters the baffle chamber 121 from the inflow port 122, flows out from the drainage hole 123, and flows through the cooling chamber 111 and the outlet hole 113 in this order, thereby completing the cooling operation of the shaft body 110 and the outer member.
It should be noted that the flow guide 120 separating the cooling cavity 111 from the first sub-cavity 1111 and the second sub-cavity 1112 should be understood as follows: when the flow guide member 120 is sleeved in the shaft body 110, the cooling cavity 111 is divided into two spaces. There are various ways to separate the flow guide element 120 in the cooling cavity 111, and this embodiment is not limited specifically, for example: the end part or the middle part of the flow guide piece 120 is hermetically sealed and connected on the cavity wall of the cooling cavity 111 in an interference fit mode, a threaded connection mode or a buckling mode and the like; or, the flow guide member 120 is sleeved with an intermediate structure, and the cooling chamber 111 is divided into two spaces, such as a partition plate and a sealing ring, by the intermediate structure.
Note that, in order to facilitate clear understanding of the longitudinal direction of the shaft main body 110 of the present embodiment, taking fig. 1 as an example, the longitudinal direction of the shaft main body 110 is a direction indicated by any arrow S in fig. 1.
Further, referring to fig. 2, one end of the flow guiding element 120 having the flow inlet 122 is in interference fit with the wall of the cooling cavity 111. The end of the baffle 120 divides the cooling chamber 111 into a first split chamber 1111 and a second split chamber 1112. In the embodiment, the end of the flow guide member 120 is hermetically sealed on the wall of the cooling cavity 111 by an interference fit, so that the cooling cavity 111 is divided into two parts. At this time, the inflow port 122 is just opposite to the introduction port 112, and the first split cavity 1111 is used for communicating the inflow port 122 with the introduction port 112, so that the installation of the flow guide member 120 in the shaft body 110 is greatly facilitated in the manufacturing process of the rotating shaft structure 100, and the manufacturing efficiency of the rotating shaft structure is effectively improved.
Specifically, referring to fig. 1, the cooling cavity 111 is a stepped cavity, and during the installation process, one end of the flow guide member 120 is inserted into the cooling cavity 111, so that one end of the flow guide member 120 is in interference fit with the cavity wall of the cooling cavity 111 by utilizing the characteristic of size reduction in the inner sub-region of the cooling cavity 111. Of course, in other embodiments, the outer side wall of the flow guide element 120 may be provided with an external thread or a fastening position, and the wall of the cooling cavity 111 is provided with an internal thread or a corresponding fastening position, so that the flow guide element 120 is sealingly sleeved in the shaft body 110 by using a threaded connection or a snap connection.
In one embodiment, referring to fig. 2, the fluid-guiding member 120 is sleeved with a first sealing member (not shown). The flow guide 120 is in sealing engagement with the wall of the cooling chamber 111 via a first seal. Therefore, the first sealing element is sleeved on the flow guide element 120 in advance in the installation process, so that the flow guide element 120 is matched with the cavity wall of the cooling cavity 111 more tightly, the sealing performance between the flow guide element 120 and the shaft body 110 is improved, and the coolant is prevented from leaking into the second sub-cavity 1112 from the first sub-cavity 1111 when being introduced.
Optionally, the first sealing element is a rubber sealing ring, a teflon sealing tape, sealing glue, or the like.
In one embodiment, referring to fig. 1, the drainage holes 123 and the outlet holes 113 are distributed in a staggered manner in the length direction of the shaft body 110, that is, the drainage holes 123 and the outlet holes 113 are not arranged in a facing manner in the length direction of the shaft body 110. Thus, when the coolant flows into the second sub-chamber 1112 from the drainage hole 123, because the drainage hole 123 and the outlet hole 113 are distributed in a staggered manner, the coolant flowing into the second sub-chamber 1112 cannot be immediately discharged from the outlet hole 113, the flowing time of the coolant in the second sub-chamber 1112 is effectively prolonged, the heat exchange efficiency between the coolant and the shaft body 110 is enhanced, and the cooling effect of the rotor is better.
It should be noted that, in the present embodiment, the drainage holes 123 and the outlet holes 113 may be one or more in number; alternatively, one of the drainage holes 123 and the outlet holes 113 is one; the number of the other holes is plural, etc.
Further, referring to fig. 1, the outlet 113 is located at a side of the second chamber 1112 close to the first chamber 1111. The drainage aperture 123 is located on the side of the second sub-chamber 1112 remote from the first sub-chamber 1111. Therefore, the outlet hole 113 and the drainage hole 123 of the present embodiment are respectively located on two opposite sides of the second sub-chamber 1112, so that the coolant in the diversion chamber 121 flows to one side of the second sub-chamber 1112 and is discharged into the second sub-chamber 1112; and back from one side of the second housing cavity 1112 to the other side in the opposite direction, enlarging the coolant flow path and thereby enhancing the cooling effect of the coolant on the shaft body 110.
In one embodiment, referring to fig. 3, the hinge structure 100 further includes a cover 130. A first port 114 is disposed at an end of the shaft body 110 away from the inlet 112. A second port 124 is provided on the end of the flow guide 120 remote from the inflow port 122. The second port 124 is disposed opposite the first port 114. Therefore, the shaft body 110 and the flow guide member 120 of the present embodiment are both open at two ends. During assembly, the baffle 120 may be inserted from the first port 114 of the shaft body 110 and sleeved within the shaft body 110, such that installation of the baffle 120 within the shaft body 110 is facilitated. Meanwhile, since the shaft body 110 and the flow guide member 120 both have open ends, in the present embodiment, the first port 114 and the second port 124 are sealed by the sealing cover 130, so that the ends of the installed flow guide member 120 and the shaft body 110 are simultaneously sealed, and the coolant is prevented from leaking out of the first port 114 and the second port 124 respectively.
It should be noted that, the manner of closing the first port 114 and the second port 124 by the cover 130 may be: plugging the cover 130 into the first port 114 and blocking the second port 124 with a side of the cover 130; alternatively, the cap 130 may be threaded into the first port 114 and then laterally block the second port 124; alternatively, the cap 130 may be directly threaded into the second port 124, with an edge seal or an interference fit with the first port 114, etc.
Alternatively, the cover 130 may be designed as a bowl-shaped plug, a stamping, etc., and the material thereof may be selected from various materials, such as: carbon steel, stainless steel, etc., but the present embodiment is not limited thereto. In addition, during the forming process, the cover 130 can be manufactured by using processes such as cold extrusion, die casting, machining, and the like. Likewise, the flow guide 120 is designed as a tubular structure. The material of the flow guiding element 120 can be selected from various materials, such as: carbon steel, stainless steel, etc., but the present embodiment is not limited thereto. In the forming process, the flow guide member 120 may be manufactured by cold extrusion, die casting, machining, or the like.
Further, referring to fig. 3, one end of the flow guide 120 having the second port 124 is in interference fit with the inner sidewall of the first port 114. The cap 130 is an interference fit with the inner wall of the first port 114 and blocks the second port 124. As such, when the flow guide 120 is sleeved in the shaft body 110 through the first port 114, one end of the flow guide 120 having the second port 124 is interference-fitted in the first port 114; the sealing cap 130 is then plugged into the first port 114, and the sealing cap 130 blocks the second port 124, so as to complete the sealing operation between the flow guide member 120 and the shaft body 110, thereby effectively preventing the coolant from leaking.
Specifically, referring to fig. 3, one end of the flow guide 120 having the second port 124 is flared, and when one end of the flow guide 120 is fitted in the first port 114, the second port 124 may be flared by using a flaring process, so that an outer wall of the second port 124 is tightly attached to an inner wall of the first port 114.
In one embodiment, referring to fig. 2, a second sealing member (not shown) is sleeved on the cover 130. The cap 130 is in sealing engagement with the inner wall of the second port 124 by a second seal. Therefore, the cover 130 is pre-sleeved with the second sealing element during the installation process, so that the cover 130 is more tightly fitted on the inner wall of the second port 124, the sealing performance between the cover 130 and the shaft body 110 is improved, and the coolant is prevented from leaking out from between the first port 114 and the second port 124 when flowing.
Optionally, the second sealing element is a rubber sealing ring, a teflon sealing tape, sealing glue, or the like.
In one embodiment, the wall thickness h between the outer surface of the shaft body 110 and the wall of the cooling cavity 111 varies from-10 mm to 10mm along the length direction of the shaft body 110, so that the wall thickness h of the shaft body 110 is controlled within a reasonable range, so that the wall thickness of the shaft body 110 tends to be uniformly distributed, and the overall weight of the rotating shaft structure 100 is maximally reduced. Meanwhile, the cooling effect on the shaft body 110 tends to be uniform, thereby being beneficial to ensuring the cooling stability of the rotor.
It should be noted that the variation value of the wall thickness h of the shaft body 110 along the length direction of the shaft body 110 is understood as: the wall thickness h of the shaft body 110 may have some fluctuation in the length direction of the shaft body 110, such as: the wall thickness h of the shaft body 110 is thicker in one region, thinner in the other region, and so on. Therefore, the variation value of the wall thickness h of the shaft body 110 in the length direction of the shaft body 110 is controlled to fluctuate within ± 10mm to ensure that the wall thickness of the shaft body 110 tends to be uniform. The change value of the wall thickness h of the shaft body 110 has two confirmation modes: firstly, dividing different areas along the length direction of the shaft body 110, and making a difference value on the wall thickness h value in the adjacent areas; and secondly, presetting a reference thickness, and making the difference between the wall thickness h value in different areas and the reference thickness value.
It should be further noted that the variation value of the wall thickness h on the shaft body 110 in the length direction of the shaft body 110 tends to 0 or equal to 0 as much as possible, so as to ensure that the wall thickness h of the shaft body 110 is absolutely equal in the length direction of the shaft body 110, and the wall thickness h of the shaft body 110 is kept uniform and consistent.
Specifically, referring to fig. 1, the cooling cavity 111 is a stepped space, and the thickness of the stepped wall is uniform in the length direction of the shaft body 110. Meanwhile, the shaft body 110 can be machined in a segmented mode and then welded and formed in the manufacturing process; of course, an integral forming process is also adopted, that is, the shaft body 110 is an integral structure, wherein the integral forming process may be a process such as integral forging, casting, extruding, die casting, and the like.
In one embodiment, referring to fig. 1, a driving motor includes a rotor, a stator, and a rotating shaft structure 100 in any of the above embodiments. The rotor is mounted on the shaft body 110, and the rotor is sleeved with the stator.
The above-mentioned driving motor, adopting the above-mentioned rotating shaft structure 100, in the cooling process, the coolant is introduced from the introducing port 112, so that the coolant flows into the flow guiding cavity 121 in the flow guiding member 120 from the inflow port 122; then, the coolant flowing into the diversion cavity 121 flows into the cooling cavity 111 from the drainage hole 123, and at this time, the coolant is fully contacted with the shaft body 110, so that the temperature on the shaft body 110 is reduced, the heat generated by the rotor is effectively transferred to the shaft body 110, and the stable temperature reduction of the rotor is realized; finally, the coolant flowing into the cooling chamber 111 is discharged from the shaft body 110 through the outlet hole 113, and the outside member is cooled. The guide member 120 is sleeved in the rotating shaft structure 100, so that the problem that a cooling system is difficult to install due to the rotation of the rotor is solved. Meanwhile, the coolant is discharged into the cooling cavity 111 from the inside of the flow guide cavity 121 through the flow guide piece 120, so that the coolant continuously flows from the middle to the periphery, the coolant in the cooling cavity 111 is always in a flowing state, the heat exchange efficiency between the coolant and the shaft body 110 is increased, the cooling effect of the rotor is improved, and the situation that part of the coolant is always in a non-flowing state due to the fact that the coolant is directly led into the cooling cavity 111 is avoided. In addition, the diversion member 120 is sleeved in the rotating shaft structure 100, so that a multi-layer heat exchange interface is formed in the cooling cavity 111, as follows: a heat exchange interface between the coolant in the guide chamber 121 and the guide member 120, a heat exchange interface between the guide member 120 and the coolant in the cooling chamber 111, a heat exchange interface between the coolant in the cooling chamber 111 and the shaft body 110, and the like. Therefore, through the multilayer heat exchange interfaces, the effective residence time of the coolant in the shaft body 110 is prolonged, the coolant is ensured to perform sufficient heat exchange, and the cooling effect of the rotor is further improved. In addition, the shaft body 110 and the flow guide piece 120 of the present application are both hollow, and therefore, on the premise of satisfying effective cooling and cooling of the rotor, the overall weight of the rotating shaft structure 100 is also effectively reduced, and the requirement of high power density of the driving motor is satisfied.
It should be noted that the stator mainly includes a stator core and a coil winding wound on the stator core, and since the stator structure is not an object of improvement of the present embodiment, the stator structure is not described in detail herein, and reference can be directly made to existing products and existing documents. Meanwhile, the rotor may adopt a rotor winding structure or a permanent magnet structure, and similarly, the rotor structure is not an object of improvement of the present embodiment, and therefore, the rotor structure will not be described in detail herein.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.
Claims (10)
1. A hinge structure, characterized in that the hinge structure comprises:
the cooling shaft comprises a shaft body, wherein a cooling cavity is arranged in the shaft body, an introducing port and an outlet port are arranged on the shaft body at intervals, and the outlet port is communicated with the cooling cavity;
the guide piece is sleeved in the shaft body, a guide cavity is arranged in the guide piece, a flow inlet and a drainage hole which are communicated with the guide cavity are arranged on the guide piece, the flow inlet is communicated with the introducing port, and the drainage hole is communicated with the cooling cavity.
2. The rotating shaft structure according to claim 1, wherein the flow guide member divides the cooling chamber into a first divided chamber and a second divided chamber which are distributed along a length direction of the shaft body, the inflow port communicates with the introduction port through the first divided chamber, the drainage hole is located in the second divided chamber and communicates with the second divided chamber, and the discharge hole communicates with the second divided chamber.
3. The spindle structure according to claim 2, wherein the drainage hole and the outlet hole are arranged in a staggered manner in a length direction of the spindle body.
4. The spindle structure of claim 3, wherein the exit aperture is located on a side of the second body cavity that is closer to the first body cavity, and the drainage aperture is located on a side of the second body cavity that is farther from the first body cavity.
5. The spindle structure according to claim 2, wherein an end of the flow guide having the inflow port is in interference fit with a wall of the cooling chamber, and the end of the flow guide divides the cooling chamber into the first chamber body and the second chamber body.
6. The spindle structure according to claim 5, wherein a first sealing member is sleeved on the flow guide member, and the flow guide member is in sealing engagement with the cavity wall of the cooling cavity through the first sealing member.
7. The rotating shaft structure according to any one of claims 1 to 6, further comprising a cover, wherein a first port is disposed on an end of the shaft body away from the introducing port, a second port is disposed on an end of the flow guiding member away from the inflow port, the second port is opposite to the first port, and the cover closes the first port and the second port.
8. The hinge structure according to claim 7, wherein the end of the flow guide having the second port is in interference fit with the inner sidewall of the first port, and the cover is in interference fit with the inner sidewall of the first port and blocks the second port.
9. A rotary shaft structure according to any one of claims 1 to 6, wherein the wall thickness h between the outer surface of the shaft body and the wall of the cooling chamber varies by-10 mm to 10mm along the length of the shaft body.
10. A driving motor, comprising a rotor, a stator and the rotating shaft structure of any one of claims 1 to 9, wherein the rotor is mounted on the shaft body, and the rotor is sleeved with the stator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011172132.4A CN112467911A (en) | 2020-10-28 | 2020-10-28 | Rotating shaft structure and driving motor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011172132.4A CN112467911A (en) | 2020-10-28 | 2020-10-28 | Rotating shaft structure and driving motor |
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| CN112467911A true CN112467911A (en) | 2021-03-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011172132.4A Pending CN112467911A (en) | 2020-10-28 | 2020-10-28 | Rotating shaft structure and driving motor |
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| CN113098188A (en) * | 2021-04-21 | 2021-07-09 | 恒大新能源汽车投资控股集团有限公司 | Hollow rotor shaft |
| CN113381555A (en) * | 2021-06-11 | 2021-09-10 | 恒大新能源汽车投资控股集团有限公司 | Rotor shaft with oil pipe and machining process thereof |
| CN114649899A (en) * | 2022-02-17 | 2022-06-21 | 恒大恒驰新能源汽车研究院(上海)有限公司 | Power shaft of motor and motor |
| WO2023279591A1 (en) * | 2021-07-05 | 2023-01-12 | 合肥巨一动力系统有限公司 | Oil-cooled hollow rotating shaft structure and oil-cooled rotor structure |
| WO2023065282A1 (en) * | 2021-10-22 | 2023-04-27 | 舍弗勒技术股份两合公司 | Transmission mechanism having cooling flow path, and electric bridge driving system |
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| CN110311506A (en) * | 2018-03-27 | 2019-10-08 | 大众汽车有限公司 | Fluid distributor for fluid cooling hollow axis |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113098188A (en) * | 2021-04-21 | 2021-07-09 | 恒大新能源汽车投资控股集团有限公司 | Hollow rotor shaft |
| CN113381555A (en) * | 2021-06-11 | 2021-09-10 | 恒大新能源汽车投资控股集团有限公司 | Rotor shaft with oil pipe and machining process thereof |
| WO2023279591A1 (en) * | 2021-07-05 | 2023-01-12 | 合肥巨一动力系统有限公司 | Oil-cooled hollow rotating shaft structure and oil-cooled rotor structure |
| WO2023065282A1 (en) * | 2021-10-22 | 2023-04-27 | 舍弗勒技术股份两合公司 | Transmission mechanism having cooling flow path, and electric bridge driving system |
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Application publication date: 20210309 |
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