WO2017121335A1

WO2017121335A1 - Rotary machine

Info

Publication number: WO2017121335A1
Application number: PCT/CN2017/070871
Authority: WO
Inventors: 胡兆庆; 袁为安; 陈惠�
Original assignee: 艾默生环境优化技术(苏州)有限公司
Priority date: 2016-01-14
Filing date: 2017-01-11
Publication date: 2017-07-20

Abstract

A rotary machine (10), comprising: a motor (100), said motor (100) comprising a rotor (110), said rotor (110) comprising a rotor core (112), and a magnet (114) embedded in the rotor core (112), thereby forming a magnetic zone (MZ) and a non-magnetic zone (NZ) at the axial end surface (119) of the rotor; balance blocks (200A-200F) has magnetic conductivity, and is provided on the rotor (110) by means of attachment to the axial end surface (119); the balance blocks (200A-200F) are attached to the axial end surface (119) in such a manner that at least a part of the magnetic zone (MZ) is not in contact with the balance blocks (200A-200F). The rotary machine is capable of lowering the cost of balance blocks, effective utilizing of the limited internal installation space of the rotary machine, as well as eliminating or reducing of the formation of a magnetic leakage path close to the axial end of a rotor.

Description

Rotary machinery

Cross-reference to related applications

This application is required to be submitted to the Chinese Patent Office on January 14, 2016, the application number is 201610023251.0, the Chinese patent application titled “Rotary Machinery” and the Chinese Patent Office submitted on January 14, 2016, the application number is 201620035017.5. The invention is entitled to the benefit of the Chinese Patent Application, the entire disclosure of which is incorporated herein by reference.

Technical field

This invention relates to the field of rotating machinery and, more particularly, to a rotary machine having improvements in the construction and installation of the weight.

Background technique

In a rotary machine including a moving part (for example, a compression mechanism, a motor, a rotary drive shaft, etc.) (for example, a compressor, particularly a scroll compressor and a rotor compressor), movement (for example, rotation) of a moving part during mechanical operation Unbalance will increase vibration, noise, etc. In some cases, the motion imbalance of the moving parts is caused by a centroid imbalance due to machining errors of the moving parts themselves and/or the components mounted thereon. In other cases, the motion imbalance of the moving parts is due to the deliberate provision of an eccentric structure in the moving parts themselves and/or the components mounted thereon to achieve a particular function (eg, in a scroll compressor, in An eccentric pin is provided at the drive shaft to utilize the eccentric principle to make the orbiting scroll circumferentially move relative to the fixed scroll).

In response to this motion imbalance, a balancing mass capable of providing a counter-centrifugal force is typically placed on the moving component to balance the resulting motion imbalance to reduce vibration and noise. In this respect, it is desirable to make improvements in terms of the manufacturing cost of the weight and the installation space utilization of the weight, in particular, by making improvements in these aspects to better adapt the weight to the rotary machine and rotation. The change of the motor (motor) used in the machine.

Here, it should be noted that the technical content provided in this section is intended to facilitate the understanding of the present invention by those skilled in the art, and does not necessarily constitute the prior art.

Summary of the invention

The general summary of the invention is provided in this section, rather than the full scope of the invention or the full disclosure of all features of the invention.

It is an object of the present invention to provide a rotary machine capable of reducing the cost of a counterweight.

Another object of the present invention is to provide a rotary machine that ensures that the balance weight can be axially accessed to ensure efficient use of the limited installation space within the rotary machine.

Another object of the present invention is to provide a rotary machine capable of reducing the number of related parts and allowing the positioning of the balance block to be more stable.

Another object of the present invention is to provide a rotary machine that ensures elimination or reduction of the formation of a magnetic flux leakage path to ensure the efficiency of the motor and thereby ensure the efficiency of the rotary machine.

In order to achieve one or more of the above objects, according to the present invention, a rotary machine is provided, which may include: a motor including a rotor, the rotor including a rotor core and embedded in the rotor a magnet in the core, thereby forming a magnet region and a non-magnetic region at an axial end face of the rotor; a balance block having a magnetic conductive property and mounted to the chassis by being attached to the axial end face Said rotor. The weight is attached to the axial end face in such a manner that at least a portion of the magnet region is not contacted by the weight.

According to the present invention, on the one hand, by making a weight from a magnetically permeable material such as an iron-based material, the cost can be remarkably reduced as compared with a weight made of a non-magnetic material such as brass. On the other hand, the balance weight is attached to the axial end face of the rotor by means of not contacting the magnet region of the axial end face of the rotor (or by only partially contacting the magnet region of the axial end face of the rotor) To the rotor, it is ensured that the counterweight can axially access the rotor to ensure efficient use of the limited installation space within the rotary machine (ie, avoiding the formation of dead spaces, which is special for reducing the axial dimension of the rotary machine) Advantageously, it is also possible to reduce the number of related parts by avoiding the mounting of the weight to the drive shaft and to allow the positioning of the weight to be more stable due to the mounting of the weight to the rotor, and also to ensure that the formation of the leakage path is eliminated or reduced. Reliably ensure the efficiency of the motor and thus the efficiency of the associated rotary machine. In particular, for an end plate made of a non-magnetically permeable material, the balance block is configured to have a step to have an air gap or the balance block is arranged to be radially inwardly displaced without overlapping portions. In other cases, the formation of the magnetic flux leakage path near the axial end portion of the rotor can be more reliably eliminated or weakened to more reliably eliminate or reduce the influence on the efficiency of the motor.

DRAWINGS

The features and advantages of one or more embodiments of the present invention will become more <RTIgt;

Figure 1 is a longitudinal sectional view showing a scroll compressor to which a weight according to the present invention is applied;

2 is an exploded perspective view showing an assembly including a rotor and a weight according to a first embodiment of the present invention;

Figure 3 is an assembled side view showing an assembly including a rotor and a weight according to a first embodiment of the present invention;

Figure 4 is an end view of the rotor;

Figure 5 is an assembled side view showing an assembly including a rotor and a weight according to a second embodiment of the present invention;

Figure 6 is an assembled side view showing an assembly including a rotor and a weight according to a third embodiment of the present invention;

Figure 7 is a motor end view showing a schematic magnetic line distribution of a permanent magnet motor;

8A and 8B are respectively graphs showing experimental results of motor efficiency of a scroll compressor to which a weight of a weight according to a first embodiment of the present invention is applied;

9 is an assembled side view showing components of a rotor and a weight according to the related art.

detailed description

The invention is described in detail below with reference to the accompanying drawings, by way of exemplary embodiments. The following detailed description of the present invention is intended to be illustrative and not restrictive

First, the structure of a scroll compressor 10 to which a weight according to the present invention is applied will be schematically described with reference to Fig. 1 (Fig. 1 is a longitudinal sectional view showing a scroll compressor to which a weight according to the present invention is applied). It is to be noted that the scroll compressor 10 corresponds to a rotary machine according to the present invention. In addition, it should also be noted that the rotary machine according to the present invention is not limited to a scroll compressor but may include other suitable types of rotary machines (especially rotary machines provided with an eccentric structure to achieve special functions, such as setting Rotor compressor with crankshaft).

As shown in FIG. 1, scroll compressor 10 may include a motor 100, a compression mechanism 400, a drive shaft 500, and a housing assembly 600. The motor 100 includes a rotor 110 and a stator 120, and the rotor 110 is fixedly coupled to the drive shaft 500 so as to be integrally rotatable. The compression mechanism 400 includes a fixed scroll 410 and an orbiting scroll 420 and is adapted to compress a working fluid (eg, a refrigerant). Motor 100, compression mechanism 400, and drive shaft 500 can be housed within housing assembly 600. An intake fitting 700 for drawing in a low pressure working fluid to be compressed may be provided at the housing assembly 600 and for discharging the passage Extrusion fitting 800 of the compressed high pressure working fluid.

In some examples, scroll compressor 10 is a variable speed (conversion) scroll compressor. In this case, in consideration of the efficiency problem, the motor 100 of the scroll compressor 10 may employ a permanent magnet motor such as a brushless permanent magnet (BPM) motor.

The scroll compressor 10 may include

weights

200A and 200B (balance weight according to the first embodiment of the present invention). The weight 200A may be attached to the upper axial end surface of the rotor 110 to be mounted to the rotor 110, and the weight 200B may be attached to the lower axial end surface of the rotor 110 to be mounted to the rotor 110. By providing the balance weight, the motion imbalance generated by the motion system of the scroll compressor 10 can be balanced to reduce vibration and noise.

The

weights

200A, 200B according to the first embodiment of the present invention will now be described with reference to Figs. 2 to 4 (Fig. 2 is an exploded perspective view showing an assembly including a rotor and a weight according to the first embodiment of the present invention, Fig. 3 is a view An assembled side view of the assembly including the rotor and the weight according to the first embodiment of the present invention is shown, and FIG. 4 is an end view of the rotor).

The

weights

200A, 200B can be made of a magnetically permeable material. In some examples, the

weights

200A, 200B can be iron-based weights made by a powder metallurgy process. In other examples, the

weights

200A, 200B can be iron-based weights made by a casting process. By making the counterweight from a magnetically permeable material such as an iron-based material, the cost of the counterweight can be significantly reduced. By making the balance block by, for example, a powder metallurgy process, the cost of the balance block can be reduced while the balance block of complicated shape and high dimensional accuracy can be easily manufactured.

Here, incidentally, the weight block 200' according to the related art is described with reference to FIG. 9 (FIG. 9 is an assembled side view showing components of the rotor and the weight block according to the related art). The rotor 110' is used in a variable speed scroll compressor, whereby the rotor 110' is a permanent magnet rotor in which permanent magnets are embedded for efficiency reasons. The integral counterweight 200' is mounted to the rotor 110' (specifically to the axial end face of the rotor 110'), thereby being compared to the case where the counterweight is mounted to the drive shaft so as to be away from (not attached to) the rotor The limited installation space (especially the axial space) in the scroll compressor can be effectively utilized. The counterweight 200' is made of a non-magnetically permeable material, such as brass, whereby the leakage of the magnetic flux via the counterweight 200' can be avoided to reduce motor efficiency.

Specifically, as shown in FIG. 7 (FIG. 7 is a motor end view showing a schematic magnetic line distribution of a permanent magnet motor), a magnetic field line ML extending radially from a magnet (for example, a permanent magnet) 114 of the rotor 110 to the stator 120 is An effective magnetic line of force capable of driving the rotation of the rotor 110. If a magnetically permeable member is placed at the (axial) end of the rotor 110, a portion of the magnetic field lines will extend axially from the magnet 114 through the magnetically permeable member (this portion of the magnetic field lines are not used to drive the rotor 110 to rotate) while in the rotor A magnetic flux leakage path is formed near the axial end.

In the related art, since the weight 200' is made of a non-magnetic material such as brass, the manufacturing cost of the weight 200' is quite high.

With continued reference to FIGS. 2 through 4, the

weights

200A, 200B in accordance with the first embodiment of the present invention can be mounted to the rotor 110 by attachment to the axial end face 119.

The motor 100 may be implemented as a permanent magnet motor (eg, a brushless permanent magnet motor) such that the rotor 110 included in the motor 100 may include a rotor core 112 and a magnet 114 embedded in the rotor core 112. In some examples, the magnet 114 can include a plurality of magnets (the magnets 114 can be interposed in slots formed in the rotor core 112) and arranged to be generally polygonal at the axial end faces 119 (see FIG. 4). Thereby, a magnet region MZ (a region occupied by the magnet 114) and a non-magnet region NZ (a region not occupied by the magnet 114) may be formed at the axial end surface 119 of the rotor 110. In the illustrated example, the magnet 114 may include six magnets to be generally hexagonal, however, it is contemplated that the magnets 114 may be of other suitable numbers and may have other suitable shapes at the axial end faces 119.

According to the first embodiment of the present invention, the scroll compressor 10 may further include an end plate 300 made of a non-magnetic conductive material such as a material having a low magnetic permeability. The end plate 300 can be disposed between the

weights

200A, 200B and the rotor 110 such that the

weights

200A, 200B can be attached (indirectly attached) to the axial end faces 119 via the end plates 300. Thereby, the

balance weights

200A, 200B are attached to the axial end surface 119 in such a manner as not to be in contact with the magnet region MZ.

The end plate 300 may be made of a non-magnetically permeable material such as brass, zinc aluminum alloy or alloy steel such as stainless steel. Additionally, in some examples, the thickness of the end plates can be from 1 to 3 millimeters and preferably 1 millimeter (however, other suitable thicknesses are contemplated). By providing an end plate made of a non-magnetically permeable material and having a small thickness, a weight made of a magnetically permeable material can be allowed to be attached (indirectly) to the rotor, thereby avoiding the formation of a magnetic flux leakage path (or reducing leakage) In the case of the formation of a magnetic channel, the balance block is allowed to approach the rotor to effectively utilize the limited installation space (especially the axial space) in the scroll compressor and allows the balance block to be fixed to the rotor to improve the stable positioning and balance of the balance block Balance effect. Moreover, since the thickness of the end plate can be small, the end plate is not manufactured by using a non-magnetic material such as brass.

Referring to FIG. 3, a weight (upper weight) 200A attached to an axial end surface (upper axial end surface) 119 of the rotor 110 may be configured to have a step portion 230 so as to include an attachment portion 210 and a body portion 220. The attachment portion (axial base) 210 is adapted to be indirectly attached to the axial end face 119. The weight 200A may be arranged such that the weight 200A has a magnet region MZ when viewed in the axial direction A Overlapping overlapping portions OL. The overlapping portion OL may be a portion of the body portion 220 that extends radially (outward) relative to the attachment portion 210. The overlapping portion OL may face the magnet region MZ across the gap G formed by the step portion 230 (for example, in the case where the end plate 300 does not cover the magnet region MZ (this case is not shown in the drawing) - for example, The magnet 114 may be positioned in the socket using other suitable securing means or facing the portion of the end plate 300 that covers the magnet region MZ (where the end plate 300 may be used to position the magnet 114 in the slot).

In some examples, the axial dimension of the gap G may preferably be 4 mm to 14 mm, or more preferably 5 mm to 10 mm, or further preferably 6 mm. By appropriately setting the axial dimension of the gap G, while ensuring the elimination or weakening of the formation of the magnetic flux leakage path, the balance block can be stably positioned on the rotor and the balance block is allowed to fully exert its balance effect.

By providing the radially outwardly extending overlapping portion OL in the weight 200A, the mass-diameter product of the weight 200A can be increased to improve the balance effect of the weight, and also due to the overlapping portion OL through the step portion 230 An (air) gap G is formed between the axial end faces 119 of the rotor 110, thus introducing high magnetic reluctance to eliminate or weaken the formation of the magnetic flux leakage path through the counterweight.

Referring to FIG. 3, the weight (lower weight) 200B attached to the axial end surface (lower axial end surface) 119 of the rotor 110 may be configured not to have a step and may be arranged not to be in contact with the magnet when viewed in the axial direction A The area MZ overlaps. Thereby, the formation of the magnetic flux leakage path extending from the magnet region MZ (the magnet 114) can also be eliminated or reduced.

The

weights

200C, 200D according to the second embodiment of the present invention are described below with reference to Fig. 5 (Fig. 5 is an assembled side view showing the assembly including the rotor and the weight according to the second embodiment of the present invention). The balance block 200C differs from the balance block 200A according to the first embodiment of the present invention mainly in that the balance block 200C is configured not to have a step portion, so that the overlap portion OL of the balance block 200C also contacts the end plate 300. The balance block 200D differs from the balance block 200B according to the first embodiment of the present invention mainly in that the balance block 200D is configured to extend further radially outward so as to have an overlap portion OL and the overlap portion OL also contacts the end plate 300.

In the second embodiment of the present invention, since the non-magnetic end plate is provided and the end plate covers the magnet region MZ, even if the

weights

200C, 200D have the overlapping region OL and the overlapping region OL contacts the end plate 300, the elimination can be eliminated. Or weaken the formation of the magnetic flux leakage channel. In addition, since the

weights

200C, 200D further extend radially outward and the overlapping portions also contact the end plates, the stable positioning of the weights and the balancing effect (due to the increase in the mass diameter) can be improved.

The

weights

200E, 200F according to the third embodiment of the present invention will be described below with reference to FIG. 6 (FIG. 6 is an assembled side view showing the assembly including the rotor and the weight according to the third embodiment of the present invention. Figure). The third embodiment of the present invention differs from the first embodiment of the invention primarily in that the end plate 300 is eliminated such that the

weights

200E, 200F, in particular the attachment portion or the axial base, are directly attached to the axial end face 119. In addition to this, the weight 200E is similar in structure and the like to the weight 200A according to the first embodiment of the present invention, and the weight 200F is similar in structure and the like to the weight 200B according to the first embodiment of the present invention.

In the third embodiment of the present invention, since the non-magnetic end plate is eliminated, the cost can be reduced. In addition, since the (air) gap G is formed between the overlapping portion of the balance block and the axial end surface of the rotor by providing the step portion, or by the inner portion of the balance block being radially inwardly displaced, there is no overlapping portion. The formation of a magnetic flux leakage path near the axial end of the rotor can still be eliminated or reduced.

Referring to FIG. 5, for the

weights

200A, 200B, 200E, 200F according to the first and third embodiments of the present invention, the axial end faces 119 may be attached to the radially inner side of the magnet region MZ. However, it is contemplated that in some cases (such as the magnet region MZ being positioned relatively inwardly), the weight may also be attached to the axial end surface 119 radially outward of the magnet region MZ.

In some examples, the axial base of the

weights

200A, 200B, 200E, 200F attached to the axial end face 119 (for the

weights

200A, 200E having the step, the attachment corresponding to the axial base) may be radial The ground is close to the magnet region MZ but does not axially overlap the magnet region MZ. In other examples, the axial base of the

weights

200A, 200B, 200E, 200F attached to the axial end face 119 may be fully or partially annular to have a circle or imaginary circle C, which may be polygonal Approximating the inscribed circle (ie, the circle or imaginary circle C is radially adjacent to a polygon composed of a plurality of magnets but does not axially overlap the polygon, or the outer diameter of the axial base is smaller than that of the plurality of magnets The inner diameter of the true inscribed circle of the constructed polygon). In this way, the outer diameter of the weight is allowed to be as large as possible, so that the stable positioning of the weight and the balance of the weight can be improved.

For the

weights

200C, 200D according to the second embodiment of the invention, the axial base attached (indirectly attached) to the axial end face 119 can then span the magnet region MZ.

In some examples: the weights 200A-200F may be secured to the rotor by a threaded connection (see bolt 910 as shown in FIG. 2) or riveted, thereby effecting installation with the rotor; additionally or alternatively, the weight 200A The -200F may be fully or partially annular, the balance block may be fixed to the drive shaft 500 fixedly coupled to the rotor by an interference fit and the axial base of the balance block may contact the axial end face of the rotor or be placed in contact with the balance block and the rotor The end plates are in between, thereby enabling installation with the rotor. In particular, for the case where the balance block is fixed to both the rotor and the drive shaft, the balance block can be positioned more stably while also ensuring that the balance block can access the rotor to effectively utilize the limited installation space in the scroll compressor.

In the first to third embodiments of the present invention described above, the balance weights (upper weight and lower balance) of the rotor of the scroll compressor are respectively exemplarily shown as a combination of the weight 200A and the weight 200B, respectively. The combination of the weight 200C and the weight 200D and the weight 200E are combined with the weight 200F. However, it is contemplated that each of the upper and lower weights of the rotor of the scroll compressor may employ a weight 200A, a weight 200B, a weight 200C, a weight 200D, a weight 200E, and a weight 200F. Either, and it is also conceivable that only one of the upper and lower weights of the rotor of the scroll compressor employs the weight 200A, the weight 200B, the weight 200C, the weight 200D, the weight 200E, and Either one of the weights 200F and the other employs a weight according to the related art.

According to the present invention, on the one hand, by making a weight from a magnetically permeable material such as an iron-based material, the cost can be remarkably reduced as compared with a weight made of a non-magnetic material such as brass. On the other hand, by attaching the weight to the axial end surface of the rotor and then to the rotor by not contacting the magnet region of the axial end surface of the rotor, it is ensured that the weight can be axially approached to the rotor to ensure the rotation Efficient use of limited installation space within the machine (ie, avoiding the formation of dead spaces, which is particularly advantageous for reducing the axial dimension of the rotary machine), and can also reduce the associated zero by avoiding the mounting of the balance block to the drive shaft The number of components and the positioning of the weights are allowed to be more stable due to the mounting of the weight to the rotor, and it is also ensured that the formation of the magnetic flux leakage path is eliminated or weakened to reliably ensure the efficiency of the motor and thereby ensure the efficiency of the associated rotary machine. In particular, for an end plate made of a non-magnetically permeable material, the balance block is configured to have a step to have an air gap or the balance block is arranged to be radially inwardly displaced without overlapping portions. In the case (corresponding to the first embodiment of the present invention), it is possible to more reliably eliminate or weaken the formation of the magnetic flux leakage path near the axial end portion of the rotor to more reliably eliminate or reduce the influence on the efficiency of the motor.

In this regard, the Applicant conducted two sets of comparative experiments on the motor efficiency of the scroll compressor 10 to which the

weights

200A, 200B according to the first embodiment of the present invention were applied, and the experimental results are shown in Figs. 8A and 8B (Fig. 8A). And FIG. 8B are graphs showing experimental results of the motor efficiency of the scroll compressor to which the weight of the weight according to the first embodiment of the present invention is applied, respectively. The experimental results of the first set of experiments are shown in Figure 8A. The first set of experiments used a scroll compressor with a smaller cooling capacity and a permanent magnet motor with a lower output power (such as a 3Ton motor). The dashed line in Fig. 8A indicates the motor efficiency as a function of the motor speed in the case of employing the weight (for example, stainless steel end plate, bolted connection, powder metallurgy iron-based weight) according to the first embodiment of the invention, and in Fig. 8A The solid line indicates that the motor efficiency varies with the motor speed in the case where the balance block and the end plate are not used in comparison. The experimental results of the second set of experiments are shown in Figure 8B. The second set of experiments used a scroll compressor with a large cooling capacity and a permanent magnet motor with a large output (for example, a 5Ton motor). Figure 8B The dashed line indicates the motor efficiency as a function of the motor speed in the case of using the balance block according to the first embodiment of the invention (for example, stainless steel end plate, bolted connection, powder metallurgy iron-based balance weight), and the actual The line indicates the motor efficiency varies with the motor speed in the case where the balance block and the end plate are not used in comparison. In the first and second sets of experiments, a comparison experiment of three machines with new balancing blocks versus three reference machines was possible. As can be seen from Figures 8A and 8B, the solid and dashed lines substantially coincide, thereby demonstrating that the use of the counterweight according to the present invention (e.g., an iron-based counterweight mounted to the rotor) does not cause improper magnetic leakage compared to the reference machine. (Magnetic leakage) causes motor efficiency to decrease or improperly decrease (ie, has minimal impact on motor efficiency).

Rotary machines in accordance with the present invention can accommodate a variety of different variations.

For example, although described above as an example in the above, the weight is attached to the axial end face in such a manner that it is not in contact with the magnet region completely (ie, all of the magnet region is not contacted by the balance block), however, it is conceivable that the balance block It may also be attached to the axial end face in contact with only a portion of the magnet region. In this variant, for example, referring to Figure 2, the circle or imaginary circle C of the axial base of the counterweight (in full or partial annular) can be tangent to the polygon formed by the plurality of magnets to become the true inscribed of the polygon. A circle, or the circle or imaginary circle C, may even (slightly) extend outward (radially outward) beyond the polygon. In this variation, for example, the axial base of the weight (in full or partial annular shape) may have one or more portions extending radially outwardly, the extension being extendable between the two magnet regions such that The axial base of the weight is brought into contact with a portion of the magnet region without excessive contact with the magnet region. According to this variant, although it is possible to cause a certain magnetic flux leakage, such leakage flux is not excessively large, so that the cost can be significantly reduced while ensuring efficient use of the limited installation space in the rotary machine without excessively affecting the efficiency of the motor. .

In summary, according to the invention, the following advantageous solutions can be included.

In the rotary machine according to the present invention, the weight is attached to the axial end face in such a manner as not to be in contact with the magnet region completely.

In the rotary machine according to the present invention, further comprising an end plate made of a non-magnetically permeable material, wherein the end plate is disposed between the balance block and the rotor such that the balance block is An end plate is attached to the axial end face.

In the rotary machine according to the present invention, the balance weight is arranged not to overlap the magnet region when viewed in the axial direction.

In the rotary machine according to the present invention, the weight is arranged such that the weight has an overlapping portion overlapping the magnet region when viewed in the axial direction.

In the rotary machine according to the present invention, the balance weight is configured to have a step portion to include an attachment portion and a body portion, the attachment portion being adapted to be attached to the axial end surface, the overlapping portion being a portion of the body portion that extends radially with respect to the attachment portion, and the overlapping portion faces the magnet region or faces the end plate with a gap formed by the step portion A portion of the magnet region.

In the rotary machine according to the present invention, the overlapping portion contacts the end plate.

In the rotary machine according to the present invention, the end plate is made of brass, zinc aluminum alloy or alloy steel; and/or the end plate has a thickness of 1 to 3 mm.

In the rotary machine according to the present invention, the weight is directly attached to the axial end face, and the balance block is arranged not to overlap the magnet region when viewed in the axial direction.

In the rotary machine according to the present invention, the weight is directly attached to the axial end face, and the weight is arranged such that the weight has a cross to the magnet when viewed in the axial direction The overlapping part of the stack.

In the rotary machine according to the present invention, the balance weight is configured to have a step portion to include an attachment portion and a body portion, the attachment portion being adapted to be directly attached to the axial end surface, the overlapping A portion is a portion of the body portion that extends radially with respect to the attachment portion, and the overlapping portion faces the magnet region with a gap formed by the step portion.

In the rotary machine according to the present invention, the gap has an axial dimension of 5 mm to 10 mm.

In the rotary machine according to the present invention, the gap has an axial dimension of 6 mm.

In the rotary machine according to the present invention, the weight is attached to the axial end surface at a radially inner side of the magnet region.

In the rotary machine according to the present invention, the axial base of the balance weight attached to the axial end face is radially adjacent to the magnet region but does not axially overlap the magnet region.

In the rotary machine according to the present invention, the magnet includes a plurality of magnets and is arranged to have a substantially polygonal shape in the axial end face, and an axial base of the balance block attached to the axial end face is completely Or partially annular to have a circle or imaginary circle that is an approximate inscribed circle of the polygon so as to be radially adjacent to the polygon but not axially overlapping the polygon.

In the rotary machine according to the present invention, the weight is an iron-based weight made by a powder metallurgy process or a casting process.

In the rotary machine according to the invention: the weight is fixed to the rotor by screwing or riveting, thereby achieving installation with the rotor; and/or the weight is completely or partially annular, The balance weight is fixed to a drive shaft fixedly coupled to the rotor by an interference fit and an axial base portion of the balance block contacts an axial end surface of the rotor or a contact is disposed between the balance block and the rotor The end plates are in between, thereby enabling installation with the rotor.

In the rotary machine according to the present invention, the rotary machine is a scroll compressor or a rotor compressor.

In the rotary machine according to the present invention, the scroll compressor is a variable speed scroll compressor and the motor is a brushless permanent magnet motor.

In the present application, the use of the terms "upper" and "lower", etc., is used for convenience of description and should not be construed as limiting. In addition, in the present application, "attachment" encompasses the direct attachment of two counterpart contacts and the indirect attachment of intervening members between the two counterparts. In addition, in the present application, the magnetically permeable material and the non-magnetic permeable material can be understood in accordance with the ordinary meaning in the art, for example, the magnetically permeable material can guide a material having a relatively high magnetic permeability, and the non-magnetic permeable material can guide a material having a relatively low magnetic susceptibility. . Further, in the present application, "having magnetic permeability characteristics" can also be understood in accordance with the ordinary meaning in the art, for example, a member made of a material such as an iron-based material can be regarded as having a guide due to a high magnetic permeability. Magnetic properties, such as those made of materials such as brass, can be considered to have no magnetic permeability due to low magnetic permeability.

The present invention has been described with reference to the preferred embodiments thereof, but it is understood that the invention is not to be construed as limited The skilled person can make various changes to the exemplary embodiments.

Claims

A rotary machine (10) comprising:

An electric machine (100) comprising a rotor (110) including a rotor core (112) and a magnet (114) embedded in the rotor core, whereby an axial end face of the rotor (119) a magnet region (MZ) and a non-magnetic region (NZ);

a weight (200A-200F) having magnetic permeability characteristics and mounted to the rotor by attachment to the axial end face,

Wherein the weight is attached to the axial end face in such a manner that at least a portion of the magnet region is not contacted by the weight.
The rotary machine (10) of claim 1 wherein the weight is attached to the axial end face in a manner that is completely out of contact with the magnet region.
The rotary machine (10) according to claim 2, further comprising an end plate (300) made of a non-magnetically permeable material, wherein the end plate is disposed at the balance block (200A-200D) and Between the rotors, the weights (200A-200D) are attached to the axial end faces via the end plates.
The rotary machine (10) according to claim 3, wherein the weight (200B) is arranged so as not to overlap the magnet region when viewed in the axial direction (A).
The rotary machine (10) according to claim 3, wherein the weight (200A, 200C, 200D) is arranged such that the weight has a cross to the magnet when viewed in the axial direction (A) The overlapping part of the stack (OL).
The rotary machine (10) according to claim 5, wherein the weight (200A) is configured to have a step (230) to include an attachment portion (210) and a body portion (220), the attachment a portion adapted to be attached to the axial end face, the overlapping portion being a portion of the body portion that extends radially with respect to the attachment portion, and the overlapping portion is passed through the step portion Forming a gap (G) facing the magnet region or facing the end plate covering the magnet region Part of the domain.
The rotary machine (10) according to claim 5, wherein the overlapping portion contacts the end plate.
A rotary machine (10) according to claim 3, wherein:

The end plate is made of brass, zinc aluminum alloy or alloy steel; and/or

The end plate has a thickness of 1 to 3 mm.
The rotary machine (10) according to claim 2, wherein the weight (200F) is directly attached to the axial end face, and the weight is arranged to be viewed in the axial direction (A) Does not overlap the magnet region.
The rotary machine (10) according to claim 2, wherein the weight (200E) is directly attached to the axial end face, and the weight is arranged such that the weight has an axial direction The overlapping portion (OL) overlapping the magnet region when viewed in the direction (A).
The rotary machine (10) according to claim 10, wherein the weight (200E) is configured to have a step (230) to include an attachment portion (210) and a body portion (220), the attachment Portion adapted to be directly attached to the axial end face, the overlapping portion being a portion of the body portion that extends radially relative to the attachment portion, and the overlapping portion is separated by the The gap (G) formed by the step faces the magnet region.
A rotary machine (10) according to claim 6 or 11, wherein the gap has an axial dimension of 5 mm to 10 mm.
The rotary machine (10) according to claim 12, wherein the gap has an axial dimension of 6 mm.
The rotary machine (10) according to any one of claims 2 to 6 and 8 to 11, wherein the weight (200A, 200B, 200E, 200F) is in the radial direction of the magnet region The side is attached to the axial end face.
The rotary machine (10) according to claim 14, wherein an axial base of the weight (200A, 200B, 200E, 200F) attached to the axial end face is radially adjacent to the magnet region However, it does not overlap axially with the magnet region.
The rotary machine (10) according to claim 14, wherein the magnet comprises a plurality of magnets and is arranged to be substantially polygonal in the axial end face, the weights (200A, 200B, 200E, 200F) The axial base attached to the axial end face is completely or partially annular to have a circle or imaginary circle (C) that is an approximate inscribed circle of the polygon so as to be radially adjacent to the The polygons do not overlap the polygons axially.
A rotary machine (10) according to any one of claims 2 to 11, wherein the weights (200A-200F) are iron-based weights made by a powder metallurgy process or a casting process.
A rotary machine (10) according to any one of claims 2 to 11, wherein:

The weights (200A-200F) are fixed to the rotor by screwing or riveting, thereby enabling installation with the rotor; and/or

The weight (200A-200F) is in full or partial annular shape, the weight is fixed to the drive shaft (500) fixedly coupled to the rotor by an interference fit and the axial base of the weight is in contact with The axial end face of the rotor or the end plate disposed between the balance weight and the rotor, thereby achieving mounting with the rotor.
A rotary machine (10) according to any one of claims 2 to 11, wherein the rotary machine is a scroll compressor (10) or a rotor compressor.
The rotary machine (10) according to claim 19, wherein the scroll compressor is a variable speed scroll compressor and the motor is a brushless permanent magnet motor.