WO2024087553A1 - Linear motor liquid-cooling heat dissipation structure based on ultrathin vapor chamber - Google Patents

Abstract

The present invention provides a linear motor liquid-cooling heat dissipation structure based on an ultrathin vapor chamber, comprising a stator and a rotor which work in conjunction with each other. The rotor is arranged on an upper surface of the stator; the stator comprises a winding assembly, an ultrathin vapor chamber and a liquid cooling plate; the lower surface of the winding assembly abuts against the ultrathin vapor chamber; and the liquid cooling plate abuts against the ultrathin vapor chamber and is arranged distant from the winding assembly. The present invention ensures the heat dissipation efficiency of a linear motor, thereby ensuring that the motor is safe and reliable and can operate for a long time.

Description

A linear motor liquid cooling heat dissipation structure based on ultra-thin heat sink Technical Field

The invention relates to the technical field of motor heat dissipation, and in particular to a linear motor liquid cooling heat dissipation structure based on an ultra-thin heat spreader.

Background technique

With the rapid development of automation, linear motors, as one of the important precision transmission mechanical parts in the automation field, have also been widely used in the 3C electronics industry. For example, in the 3C patch industry, linear motors are used in plug-in machines, patch machines, attached material placement, flexible material placement, reinforcement machines, binding machines and other equipment. For most linear motors, to achieve high precision and miniaturization under the premise of ensuring certain working performance, good heat dissipation conditions need to be provided.

The heat of linear motors mainly comes from the ohmic heat generated when the rotor windings are working. Based on the current liquid-cooled linear motor winding structure, the heat generated needs to be transferred from the windings far away from the liquid cooling plate to the windings close to the liquid cooling plate, and then transferred to the winding base or core laminations through the insulation layer, and finally the heat is transferred to the liquid cooling module for heat dissipation. However, the thermal resistance of this heat dissipation path is large and the heat dissipation efficiency is very low. The motor is prone to heat accumulation during long-term operation, and even "burning" may occur. At the same time, when the internal temperature of the motor is high, its insulation life decreases accordingly, and other mechanical properties such as the strength and hardness of metal parts are also reduced, which seriously affects the operating life and safety of the motor.

Summary of the invention

In view of the deficiencies in the prior art, the present invention proposes a linear motor liquid cooling heat dissipation structure based on an ultra-thin heat spreader to ensure the heat dissipation efficiency of the linear motor and ensure that the motor can operate safely and reliably for a long time.

The technical solution of the present invention is achieved in this way:

A linear motor liquid cooling heat dissipation structure based on an ultra-thin heat spreader, comprising a stator and a mover that cooperate with each other, the mover being arranged on the upper surface of the stator, the stator comprising a winding assembly, an ultra-thin heat spreader and a liquid cooling plate, the lower surface of the winding assembly abuts against the ultra-thin heat spreader, the liquid cooling plate abuts against the ultra-thin heat spreader and is arranged away from the winding assembly.

Furthermore, the winding assembly includes a winding base and at least one first winding, the winding base is provided with a groove, and the first winding is embedded in the groove.

Furthermore, the winding assembly includes a flat iron core and at least two second windings, and the second windings are fixed side by side on the flat iron core.

Furthermore, the area of the ultra-thin heat spreader is greater than or equal to the lower surface area of the winding assembly.

Furthermore, the ultra-thin heat spreader and the winding assembly are in surface contact.

Furthermore, the liquid cooling plate is thicker than the ultra-thin heat sink.

Furthermore, the mover includes a magnetic steel and a mover housing that are connected to each other.

Furthermore, a plurality of grooves are provided on a side of the magnetic steel close to the winding assembly.

Furthermore, the interior of the stator is filled with a thermally conductive interface material.

Compared with the prior art, the present invention has the following advantages.

The present invention adds an ultra-thin heat spreader between the stator winding assembly and the liquid cooling plate. Based on the high thermal conductivity of the ultra-thin heat spreader, the ohmic heat generated by the winding assembly during operation is evenly transferred from the winding assembly to the liquid cooling plate and taken away. Compared with the traditional linear motor heat dissipation structure, this heat dissipation path has the advantage of low thermal resistance, high stator heat dissipation efficiency, and the motor is not prone to heat accumulation even if it runs for a long time. It can maintain the strength, hardness and other mechanical properties of metal parts, extend the service life of insulation and motor, and improve safety.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

FIG1 is a front view of a first embodiment of the present invention;

FIG2 is a three-dimensional exploded view of the first embodiment of the present invention;

FIG3 is a front view of a second embodiment of the present invention;

FIG4 is a three-dimensional exploded view of a second embodiment of the present invention;

Figure symbols: 1. Liquid cooling plate; 2. Ultra-thin heat sink; 3. Winding base; 4. First winding; 5. Magnetic steel; 6. Mover housing; 7. Flat iron core; 8. Second winding.

Detailed ways

The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", "fourth", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

Implementation Method 1

Referring to Figures 1 and 2, an embodiment of the present invention discloses a linear motor heat dissipation structure based on an ultra-thin heat spreader 2, including a stator and a mover that cooperate with each other, the mover being arranged on the upper surface of the stator, the stator including a winding assembly, an ultra-thin heat spreader 2 and a liquid cooling plate 1, the lower surface of the winding assembly abuts against the ultra-thin heat spreader 2, and the liquid cooling plate 1 abuts against the ultra-thin heat spreader 2 and is arranged away from the winding assembly. The linear motor in this embodiment mainly refers to a U-shaped coreless linear motor, so the mover is sleeved on the upper side of a single stator, so that the mover can slide along the stator. Preferably, the liquid cooling plate 1 and the ultra-thin heat spreader 2 are connected to form an integrated structure by welding, and the ultra-thin heat spreader 2 can also be embedded in the linear motor by bonding, threading, etc.

In a specific implementation, the winding assembly includes a winding base 3 and at least one first winding 4, the winding base 3 is provided with a groove, and the first winding 4 is embedded in the groove. The mover includes an inverted U-shaped mover housing and a magnetic steel 5, the magnetic steel 5 is fixed in parallel to two vertical side walls of the mover housing 6, and the mover is sleeved on the first winding 4 so that the mover moves along the first winding 4.

Furthermore, the area of the ultra-thin vapor chamber 2 is greater than or equal to the area of the lower surface of the winding assembly, so that there is a larger heat conduction area between the ultra-thin vapor chamber 2 and the winding assembly.

Furthermore, the ultra-thin heat spreader 2 is in surface contact with the winding assembly, so that the heat transfer path area is larger, and the heat dissipation effect of the motor is fully guaranteed.

Furthermore, the thickness of the liquid cooling plate 1 is greater than that of the ultra-thin heat spreader 2, so that the liquid cooling plate 1 can accommodate a liquid cooling channel, and a liquid cooling medium is introduced into the liquid cooling channel, so that heat will not accumulate after being transferred to the liquid cooling plate 1, but will be quickly taken away, further increasing the heat dissipation efficiency.

Furthermore, the interior of the stator is filled with thermal conductive interface material. In order to avoid the problem of insufficient contact such as point contact or line contact between the liquid cooling plate 1, the ultra-thin heat spreader 2, the winding base 3 or the winding core and the winding, which leads to increased thermal resistance, a certain amount of thermal conductive interface material is poured to fill the air gap therebetween and reduce the thermal resistance, thereby achieving efficient heat dissipation. Thermal conductive interface material refers to the general term for materials used to coat between heat dissipation devices and heat generation devices to reduce the contact thermal resistance between them, including thermal conductive silicone grease, thermal conductive mud, thermal conductive glue, etc.

Implementation Method 2

As shown in Figures 3 and 4, the difference between this embodiment and the first embodiment is that the linear motor in this embodiment mainly refers to a flat iron core linear motor, and the winding assembly includes a flat iron core 7 and at least two second windings 8, and the second windings 8 are fixed side by side on the flat iron core 7. The mover includes a flat mover housing 6 and a magnetic steel 5, the magnetic steel 5 is fixed parallel to the mover housing 6, and the mover is arranged in parallel on the second winding 8 so that the mover moves along the first winding 4, and the magnetic steel 5 is provided with a plurality of grooves on one side close to the winding assembly.

Specifically, the heat generated by the second winding 8 wound on the flat iron core 7 is transferred to the middle of the ultra-thin heat spreader 2 through the iron core. By utilizing its high thermal conductivity and super strong temperature uniformity, the heat is quickly and evenly transferred to various parts of the liquid cooling plate 1 and dissipated by the coolant.

Beneficial effects of the present invention:

1. The present invention can significantly improve the liquid cooling efficiency of the linear motor, reduce the temperature of the motor copper wire winding, increase the rated power of the motor, and achieve lightweight and miniaturization of the motor.

Second, the present invention has a simple structure and has low assembly requirements.

3. The parts involved in this device do not require high precision and are easy to process.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims (9)

1. A linear motor liquid cooling heat dissipation structure based on an ultra-thin heat spreader, comprising a stator and a mover that cooperate with each other, characterized in that: the mover is arranged on the upper surface of the stator, the stator comprises a winding assembly, an ultra-thin heat spreader and a liquid cooling plate, the lower surface of the winding assembly abuts against the ultra-thin heat spreader, and the liquid cooling plate abuts against the ultra-thin heat spreader and is arranged away from the winding assembly.
2. According to the linear motor liquid cooling heat dissipation structure based on ultra-thin heat spreader according to claim 1, it is characterized in that the winding assembly includes a winding base and at least one first winding, the winding base is provided with a groove, and the first winding is embedded in the groove.
3. According to the linear motor liquid cooling heat dissipation structure based on ultra-thin heat spreader according to claim 1, it is characterized in that the winding assembly includes a flat iron core and at least two second windings, and the second windings are fixed side by side on the flat iron core.
4. According to the linear motor liquid cooling heat dissipation structure based on ultra-thin heat spreader according to claim 2 or 3, it is characterized in that the area of the ultra-thin heat spreader is greater than or equal to the lower surface area of the winding assembly.
5. According to the linear motor liquid cooling heat dissipation structure based on ultra-thin heat spreader according to claim 2 or 3, it is characterized in that there is surface contact between the ultra-thin heat spreader and the winding assembly.
6. According to the linear motor liquid cooling and heat dissipation structure based on ultra-thin heat spreader according to claim 2 or 3, it is characterized in that the thickness of the liquid cooling plate is greater than that of the ultra-thin heat spreader.
7. According to the linear motor liquid cooling and heat dissipation structure based on ultra-thin heat spreader according to claim 2 or 3, it is characterized in that the mover includes connected magnetic steel and a mover housing.
8. According to the linear motor liquid cooling heat dissipation structure based on ultra-thin heat spreader according to claim 7, it is characterized in that a plurality of grooves are provided on the side of the magnetic steel close to the winding assembly.
9. According to the linear motor liquid cooling heat dissipation structure based on ultra-thin heat spreader according to claim 1, it is characterized in that the interior of the stator is filled with thermal conductive interface material.