JP2003184758A - Fiber reinforced resin screw rotor - Google Patents

Fiber reinforced resin screw rotor

Info

Publication number
JP2003184758A
JP2003184758A JP2001382467A JP2001382467A JP2003184758A JP 2003184758 A JP2003184758 A JP 2003184758A JP 2001382467 A JP2001382467 A JP 2001382467A JP 2001382467 A JP2001382467 A JP 2001382467A JP 2003184758 A JP2003184758 A JP 2003184758A
Authority
JP
Japan
Prior art keywords
fiber
layer
rotor
resin
fibers
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP2001382467A
Other languages
Japanese (ja)
Other versions
JP4013537B2 (en
Inventor
Toshio Hattori
Tomohiro Naruse
Yasushi Takatsu
Norio Takeda
友博 成瀬
敏雄 服部
憲生 竹田
恭 高津
Original Assignee
Hitachi Ltd
株式会社日立製作所
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd, 株式会社日立製作所 filed Critical Hitachi Ltd
Priority to JP2001382467A priority Critical patent/JP4013537B2/en
Publication of JP2003184758A publication Critical patent/JP2003184758A/en
Application granted granted Critical
Publication of JP4013537B2 publication Critical patent/JP4013537B2/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fiber reinforced resin rotor having superior strength, impact resistance, and abrasion resistance and having high dimension accuracy and stability and to provide its manufacturing method. <P>SOLUTION: A surface layer is formed of a sheet formed by impregnating thermosetting resin in reinforcing fiber, and a rotor tooth part is molded by filling a preparatory molding material obtained by kneading reinforcing short fiber with the thermosetting resin in a space between the surface layer and a central shaft. This constitution can reinforce the vicinity of the rotor surface by relatively long fiber chopped into the length 10-100 mm or continuous fiber and fill the space between the surface layer and the central shaft with the fiber reinforced resin. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fiber-reinforced resin screw rotor.

[0002]

2. Description of the Related Art A conventional screw rotor made of fiber-reinforced resin is manufactured from a thermosetting resin containing reinforcing fibers after a central shaft is housed in a molding die as described in, for example, Japanese Patent Laid-Open Publication No. 10-141262. There is a rotor tooth portion integrally formed on the outer periphery of the central axis. Here, the reinforcing fibers are those reinforced with short glass fibers having a fiber length of 10 mm or less, carbon fibers, aramid fibers, or the like.

Further, as described in JP-A-2-27180, in order to improve the lubricity and wear resistance of the rotor surface, the molded rotor teeth made of fiber reinforced resin are coated with fluororesin or the like. There is.

[0004]

Generally, the fiber-reinforced resin rotor is applied only to a limited small-sized and small-capacity rotor. This is because the conventional monolithic rotor made of short fiber reinforced resin lacks strength and impact resistance in a large-sized and large-capacity rotor, which causes a problem of cracking and breaking. Also, because the fiber-reinforced resin rotor has poor wear resistance, the rotor surface wears and compression efficiency decreases, and dimensional stability under high temperature and high humidity deteriorates. There is a problem that abnormal deformation causes abnormal wear. Further, since the resin has large molding shrinkage and linear expansion coefficient, the dimensional accuracy required at the time of molding cannot be satisfied, and in particular, the problem of dimensional accuracy is fatal for medium and large size rotors, so it has not been put to practical use. .

An object of the present invention is to provide a rotor made of fiber reinforced resin which is excellent in strength, impact resistance and abrasion resistance, and has high dimensional accuracy and dimensional stability, and a method for producing the same.

[0006]

Means for Solving the Problems The above object is to provide a screw rotor made of a fiber-reinforced resin in which a thermosetting resin is reinforced with fibers, in which a surface layer is formed by a sheet in which reinforcing fibers are impregnated with the thermosetting resin, This is achieved by filling a preforming material obtained by kneading short fibers and a thermosetting resin between the surface layer and the central axis to form the rotor tooth portion.

Further, the above object is achieved by setting the fiber orientation of the surface layer in the direction along the circumference of the screw rotor.

Further, the above object can be achieved by setting the fiber orientation of the surface layer in a direction along the principal stress of the rotor during operation of the screw rotor.

Further, the above-mentioned object is that the surface layer is made of glass fiber,
It is achieved by comprising a sheet molding compound containing carbon fibers or aramid fibers.

The above object is also achieved by the fact that the preforming material filled between the surface layer and the central axis is composed of a bulk molding compound containing glass fiber, carbon fiber or aramid fiber.

Further, in the above-mentioned object, in a screw rotor made of a fiber reinforced resin in which a thermosetting resin is reinforced with fibers, a sheet in which reinforcing fibers are impregnated with the thermosetting resin is placed in advance in a mold, and the sheet and the center This is accomplished by injection molding or transfer molding of a preforming material obtained by kneading the reinforcing short fibers and the thermosetting resin between the shafts to form the rotor tooth portion.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a side view showing an embodiment of the screw rotor made of fiber reinforced resin of the present invention. FIG. 2 is a sectional view taken along the line AA ′ of FIG. FIG. 3 is a sectional view taken along the line BB ′ of FIG. 1 to 3, the surface layer 1 is formed by molding a preformed sheet in which a reinforcing fiber is impregnated with a resin. For the preformed sheet, the reinforcing fibers chopped to have a fiber length of 10 to 100 mm were processed into a non-woven fabric, and then SMC formed by impregnating with resin, or a sheet obtained by processing continuous fibers into a fabric was impregnated with resin. SMC or resin is kneaded with auxiliary materials such as a low shrinkage agent, a flame retardant, and a coloring agent. Then, SMC or the like obtained by impregnating the compound obtained by mixing the uniformly dispersed mixture with the thickener with the reinforcing fiber chopped to have a fiber length of 10 to 100 mm is applied.

In the SMC in which the dispersion of chopped fibers is adjusted so that the orientation in a specific direction is increased, or in the SMC in which a continuous fiber is processed into a woven state and impregnated with a resin, the fiber direction is a circle of the screw rotor. The surface layer 1 is formed by arranging SMC in the mold so as to match the circumferential direction and the principal stress direction. Thereby, the surface layer 1 in which the strength and the direction are required to be efficiently strengthened can be formed. 2 is a central axis. 3 is a short fiber reinforced resin layer.

By the way, as a method for forming the fiber reinforced resin layer 3 on the surface of the molding die, a hand lay-up method and a spray-up method are generally used, but both methods are applied to a large-sized molded product. Considering that the mold surface of the screw rotor is in a closed space and the rotor diameter is about 250 mm at the maximum, it is impossible to form the surface layer by the hand lay-up method or the spray-up method.

Since SMC is a sheet that is soft and does not have tackiness at room temperature, even with a screw rotor die having a complicated shape, the sheet can be easily placed at any position in the die. In addition, since SMC is clay-like and has a high viscosity, the reinforcing fibers do not flow excessively due to heating and pressurization during surface layer molding, and the reinforcing fibers are placed at appropriate positions on the screw rotor tooth portion to be fiber-reinforced. It can be arranged and a surface layer of uniform thickness can be formed.

In the molding of the surface layer by centrifugal molding in which a liquid molding material having a low viscosity and reinforcing fibers are put into a mold and the mold is rotated, the reinforcing fibers and the resin largely flow during molding. In the screw rotor, since the diameters of the tip circle and the bottom circle are extremely different, the reinforcing fibers and the resin flow in the centrifugal molding, resulting in improper arrangement of the reinforcing fibers and uneven thickness of the surface layer. On the other hand, in the SMC having a high viscosity, the reinforcing fibers are arranged at a desired position on the screw rotor, and the surface layer having a uniform thickness can be formed.

For parts such as gears whose cross-sectional shape does not change in the direction of the central axis, it is comparatively preferable to form the teeth by mechanical cutting after molding the disc or annular fiber reinforced resin. Easy, but like a screw rotor,
It is not easy to form teeth by mechanical cutting in parts whose cross-sectional shape changes in the central axis direction. Therefore, in forming a resin screw rotor having a fiber surface reinforced on the rotor surface, it is effective to form a surface layer by SMC that does not require mechanical cutting.

As the SMC resin, thermosetting resins such as unsaturated polyester and vinyl ester are used.
Unsaturated polyester is inexpensive and the curing conditions can be changed according to the purpose, so that the degree of freedom in molding is very large. In a water-lubricated screw compressor in which water is jetted into the compression action space of the screw compressor to lubricate, cool and seal the space, the screw rotor operates in a high temperature and high humidity environment. Unsaturated polyester has excellent dimensional stability under high temperature and high humidity, and is therefore suitable as a material for a screw rotor of a water-lubricated screw compressor.
Further, since unsaturated polyester SMC having various characteristics such as low shrinkage, impact resistance, and abrasion resistance are commercially available, it can be selected according to the application. Since SMC using vinyl ester as a matrix resin has higher strength than that of unsaturated polyester, it can be considered to be applied as a rotor material of a large-capacity screw compressor.

As the reinforcing fibers of SMC, inorganic fibers such as glass fibers and carbon fibers, organic fibers such as aramid fibers, polyarylate fibers and high strength polyethylene fibers are applied.

Since the glass fiber is strongly chemically bonded to the thermosetting resin such as unsaturated polyester resin, epoxy resin or phenol resin through the coupling agent, the surface layer 1 which is inexpensive and has high strength can be formed. Carbon fiber is light and strong, so if you use it especially near the surface of the screw rotor,
It is possible to reduce the centrifugal force of the rotation of the rotor along with the cracks on the rotor surface, and prevent the rotor from being damaged by the centrifugal force. Organic fibers are lighter and tougher than carbon fibers, and therefore have excellent impact characteristics and vibration damping characteristics.

Therefore, if the organic fiber is applied to the surface layer, the centrifugal force at the time of rotation of the rotor can be greatly reduced, and the reliability of the strength against the impact load at the time of start-up becomes high. Since aramid fiber has excellent wear resistance, it is possible to realize a screw compressor in which compression efficiency is less likely to decrease due to wear of the rotor surface. Since the polyarylate fiber is a polyester fiber and does not absorb water, it can be used as a rotor of a water-lubricated screw compressor to realize a rotor having excellent dimensional stability. Since the high-strength polyethylene fiber is classified into the highest-strength and high-elasticity fibers among the organic fibers, a surface layer excellent in strength can be formed.

Between the surface layer 1 and the central axis 2 is a short fiber reinforced resin layer 3 filled with a preforming material obtained by kneading reinforcing short fibers and a thermosetting resin. As this preforming material, BMC in which a reinforcing material is uniformly dispersed by kneading a resin and auxiliary materials such as a low-shrinking agent and a colorant with a kneader, and then mixing a thickener is applied.

As the BMC resin, a thermosetting resin such as unsaturated polyester resin is used. BMC using unsaturated polyester as a matrix resin has a molding shrinkage rate of 0 to 0.02 by adjusting auxiliary materials such as a low shrinkage agent.
%, The coefficient of linear expansion 20 × 10 - it is possible to less 6 / K, it is possible to better molding dimensional accuracy. In particular, since a screw rotor having a complicated three-dimensional shape is extremely complicated in cutting work, if it can be integrally molded with a die, the manufacturing cost can be significantly reduced. Further, since unsaturated polyester BMC has excellent dimensional stability against temperature and humidity, it can be applied as a rotor material for a water-lubricated screw compressor.

As the reinforcing short fibers, inorganic fibers such as glass fibers and carbon fibers, organic fibers such as aramid fibers, polyarylate fibers and high strength polyethylene fibers are used. The glass fiber is chemically bonded to a thermosetting resin such as an unsaturated polyester resin, an epoxy resin, or a phenol resin through a coupling agent, so that the glass fiber becomes an inexpensive and high-strength fiber-reinforced resin layer. Since carbon fiber is light and strong, if carbon fiber is used as a reinforcing fiber, the overall weight of the screw rotor will be lighter, and the instantaneous load force of the prime mover when starting the screw compressor will be significantly reduced. It is possible to prevent rotor destruction due to force. Since organic fibers are lighter and tougher than carbon fibers, impact properties,
Excellent vibration damping characteristics. If organic fibers are applied to the short fiber reinforced resin layer, in addition to the characteristics of the carbon fiber reinforced type,
The reliability of the strength of the screw rotor is improved with respect to the impact load at the time of starting the screw compressor.

FIG. 4 is a diagram showing a manufacturing process of the fiber-reinforced resin screw rotor of the present invention. In FIG. 4, as the surface layer 1, an SMC sheet 5 in which reinforcing fibers are impregnated with a thermosetting resin is placed in a mold 6 in advance, and reinforcing short fibers and thermosetting are provided between the sheet 5 and the central axis 2 7. The preform material obtained by kneading the resin is injection-molded or transfer-molded to form the rotor tooth portion.

In such a manufacturing method, since the surface layer 1 made of a sheet in which the reinforcing fibers are impregnated with the thermosetting resin and the short fiber reinforced resin layer 3 inside the surface layer 1 can be simultaneously molded, the number of manufacturing steps increases. Cost can be reduced. Further, by molding at the same time, it is possible to manufacture a rotor in which the surface layer 1 and the fiber-reinforced resin layer 3 inside thereof are excellent in adhesiveness. Furthermore, even with a complicated shape such as a screw rotor, the surface layer 1 having a substantially uniform thickness can be formed on the rotor surface.

It is also possible to arrange the sheet in which the reinforcing fibers are impregnated with the thermosetting resin in the mold 6 and then rotate the mold to form the surface layer 1 by centrifugal force. In the case of a soft sheet such as SMC, the surface layer having a uniform thickness can be formed by such a manufacturing method without excessive flow of fibers and resin.

In the above-mentioned embodiment, only the surface layer 1 is formed of a sheet in which reinforcing fibers are impregnated with a thermosetting resin, but the sheet may form the central layer in the vicinity of the central axis.

FIG. 5 is a cross-sectional view of a screw rotor made of fiber reinforced resin provided with the second embodiment of the present invention, and is a view corresponding to FIG. FIG. 6 is a sectional view of a screw rotor made of fiber reinforced resin, which is also equipped with the second embodiment shown in FIG. 5, and corresponds to FIG. 3. 5 and 6,
Depending on the shape of the screw rotor, the generated stress due to the centrifugal force during operation may be extremely large in the central layer 4. In such a case, it is effective to form the center layer 4 having higher strength than the short fiber reinforced layer 3. If the SMC having the surface layer 1 is also used as the center layer, the fibers can be oriented in the circumferential direction corresponding to the main stress direction during operation of the screw rotor, and the center layer having a uniform thickness can be easily formed. Can be formed.

FIG. 7 is a diagram showing a manufacturing process of a screw rotor provided with the second embodiment. In FIG. 7, a sheet 5 of SMC to be the surface layer 1 and the center layer 4 is placed in advance in a mold, and a reinforcing short fiber and a thermosetting resin are kneaded in a space 8 composed of the surface layer sheet and the center layer sheet. The preformed material thus obtained is injection-molded or transfer-molded to form a short fiber reinforced layer. By such a molding method, a rotor having good adhesion between the surface layer, the center layer and the short fiber reinforced layer is manufactured.

As described above, according to the present invention, a relatively long fiber chopped to a length of 10 to 100 mm near the rotor surface is formed by forming a surface layer with a sheet in which reinforcing fibers are impregnated with a thermosetting resin, or Since it can be reinforced with continuous fibers, abnormal wear due to cracks on the rotor surface and deformation of rotor teeth is unlikely to occur. On the other hand, the space between the surface layer and the central axis is also filled with the fiber-reinforced resin, so that the rotor is less likely to be broken due to the centrifugal force during high-speed rotation.

Further, the circumferential stress near the rotor surface, which is dominant when the rotor is in operation, can be efficiently relieved by the reinforcing fibers along the circumferential direction. Therefore, abnormal wear due to cracks on the rotor surface and deformation of the rotor teeth is unlikely to occur.

Further, since the reinforcing fibers are oriented along the stress near the rotor surface generated when the rotor is in operation, cracks on the rotor surface are unlikely to occur. On the other hand, since the reinforcing fibers suppress the deformation of the rotor teeth, abnormal wear due to the deformation is unlikely to occur.

In addition, the molding shrinkage is higher than that of the thermoplastic resin.
Since the surface layer is a sheet molding compound having a small linear expansion coefficient (hereinafter referred to as SMC), the dimensional accuracy of the molded product is good. If glass fiber is used as the reinforcing fiber, an inexpensive and high-strength rotor can be realized. If carbon fiber is used as the reinforcing fiber,
A lightweight and high-strength rotor can be realized. When the aramid fiber is used as the reinforcing fiber, a rotor having high strength, impact resistance and abrasion resistance can be realized.

Further, the molding shrinkage of the bulk molding compound (hereinafter BMC) is 0 to 0.02%,
Since the coefficient of linear expansion is as small as 20 × 10 −6 / K or less, the dimensional accuracy of the molded product is very good. Since glass fiber is inexpensive and chemically bonded to the matrix resin firmly, it is inexpensive and can prevent the rotor from being damaged due to centrifugal force. Since carbon fibers are lighter than glass fibers and can reduce the generated centrifugal force, the rotor to which the carbon fibers are applied is less likely to be damaged by the centrifugal force. Since aramid fiber has high strength and excellent impact resistance, the rotor is less likely to be damaged by centrifugal force, and has high reliability against an impact load generated at the time of starting.

Further, since the surface layer made of a sheet in which reinforcing fibers are impregnated with a thermosetting resin and the short fiber reinforced resin layer inside thereof can be molded at the same time, the cost associated with the increase of the manufacturing process can be reduced. On the other hand, by molding at the same time,
A rotor having good adhesion between the surface layer and the fiber-reinforced resin layer inside the surface layer can be manufactured.

Furthermore, since the centrifugal force due to the rotation is uniformly applied to the sheet in which the reinforcing fibers are impregnated with the thermosetting resin, the surface layer having a uniform thickness can be formed. Therefore, it is possible to manufacture a rotor with little variation in mechanical properties such as strength and impact resistance.

[0039]

Industrial Applicability According to the present invention, it is possible to provide a screw rotor made of a fiber reinforced resin which is excellent in strength, impact resistance and abrasion resistance, and has high dimensional accuracy and dimensional stability.

[Brief description of drawings]

FIG. 1 is a side view schematically showing one fiber-reinforced resin screw rotor according to an embodiment of the present invention.

2 is a cross-sectional view taken along the line A-A ′ of FIG.

3 is a cross-sectional view taken along the line B-B 'of FIG.

FIG. 4 is a cross-sectional view schematically showing a method for manufacturing a fiber-reinforced resin screw rotor according to the above.

FIG. 5 is a cross-sectional view of a screw rotor made of fiber reinforced resin according to another embodiment of the present invention, which corresponds to FIG.

FIG. 6 is a cross-sectional view corresponding to FIG. 3 of a fiber-reinforced resin screw rotor including the same embodiment.

FIG. 7 is a cross-sectional view showing a method for manufacturing a fiber-reinforced resin screw rotor including the embodiment.

[Explanation of symbols]

1 ... Surface layer, 2 ... Central axis, 3 ... Short fiber reinforced resin layer, 4 ...
Center layer, 5 ... SMC, 6 ... Mold, 7 ... Space consisting of surface layer sheet and center axis, 8 ... Space consisting of surface layer sheet and center layer sheet.

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Toshio Hattori             502 Kintatemachi, Tsuchiura City, Ibaraki Japan             Tate Seisakusho Mechanical Research Center (72) Inventor K. Takatsu             603 Jinmachi-cho, Tsuchiura-shi, Ibaraki Japan Co., Ltd.             Tate Manufacturing Industrial Machinery Systems Division F term (reference) 3H041 AA00 BB05 CC13 CC15 DD05                       DD33                 3H044 AA00 BB04 CC12 CC14 DD05                       DD23

Claims (7)

[Claims]
1. In a screw rotor made of a fiber-reinforced resin in which a thermosetting resin is reinforced with fibers, a surface layer is formed by a sheet in which reinforcing fibers are impregnated with the thermosetting resin, and reinforcing short fibers and thermosetting resin are formed. A fiber-reinforced resin screw rotor, characterized in that a preform material obtained by kneading is filled between the surface layer and a central axis to form a rotor tooth portion.
2. The screw rotor made of fiber reinforced resin according to claim 1, wherein the fiber orientation of the surface layer is in the direction along the circumference of the screw rotor.
3. A fiber-reinforced resin screw rotor according to claim 1, wherein the fiber orientation of the surface layer is in a direction along the principal stress of the rotor during operation of the screw rotor.
4. The fiber-reinforced resin screw rotor according to claim 1, wherein the surface layer is made of a sheet molding compound containing glass fiber, carbon fiber or aramid fiber.
5. The fiber-reinforced resin according to claim 1, wherein the preforming material filled between the surface layer and the central axis is composed of a bulk molding compound containing glass fiber, carbon fiber or aramid fiber. Screw rotor.
6. In a screw rotor made of a fiber-reinforced resin in which a thermosetting resin is reinforced with fibers, a sheet in which reinforcing fibers are impregnated with the thermosetting resin is placed in advance in a mold, and the sheet is placed between the sheet and the central axis. A method for producing a screw rotor made of a fiber-reinforced resin, which comprises molding a rotor tooth portion by injection molding or transfer molding a preforming material obtained by kneading reinforcing short fibers and a thermosetting resin.
7. In a screw rotor made of a fiber-reinforced resin in which a thermosetting resin is reinforced with fibers, a sheet in which reinforced fibers are impregnated with the thermosetting resin is placed in a mold, and the mold is rotated by centrifugal force. A fiber characterized by forming a surface layer and then filling a preforming material obtained by kneading reinforcing short fibers and a thermosetting resin between the surface layer and the central axis to form a rotor tooth portion. Reinforcement resin screw rotor manufacturing method.
JP2001382467A 2001-12-17 2001-12-17 Fiber reinforced resin screw rotor Expired - Fee Related JP4013537B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2001382467A JP4013537B2 (en) 2001-12-17 2001-12-17 Fiber reinforced resin screw rotor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2001382467A JP4013537B2 (en) 2001-12-17 2001-12-17 Fiber reinforced resin screw rotor

Publications (2)

Publication Number Publication Date
JP2003184758A true JP2003184758A (en) 2003-07-03
JP4013537B2 JP4013537B2 (en) 2007-11-28

Family

ID=27592799

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2001382467A Expired - Fee Related JP4013537B2 (en) 2001-12-17 2001-12-17 Fiber reinforced resin screw rotor

Country Status (1)

Country Link
JP (1) JP4013537B2 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016049514A1 (en) * 2014-09-25 2016-03-31 Eaton Corporation Composite molded rotary component
US20170101989A1 (en) * 2014-03-12 2017-04-13 Eaton Corporation Methods for making a low inertia laminated rotor
US9932983B2 (en) 2013-03-15 2018-04-03 Eaton Intelligent Power Limited Low inertia laminated rotor
US10208656B2 (en) 2012-11-20 2019-02-19 Eaton Intelligent Power Limited Composite supercharger rotors and methods of construction thereof
US10630121B1 (en) * 2015-09-23 2020-04-21 Regal Beloit America, Inc. Rigid rotor structures for conical air gap electrodynamic machines

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10208656B2 (en) 2012-11-20 2019-02-19 Eaton Intelligent Power Limited Composite supercharger rotors and methods of construction thereof
US9932983B2 (en) 2013-03-15 2018-04-03 Eaton Intelligent Power Limited Low inertia laminated rotor
US20170101989A1 (en) * 2014-03-12 2017-04-13 Eaton Corporation Methods for making a low inertia laminated rotor
WO2016049514A1 (en) * 2014-09-25 2016-03-31 Eaton Corporation Composite molded rotary component
CN107073846A (en) * 2014-09-25 2017-08-18 伊顿公司 Composite molding rotary part
US20170298733A1 (en) * 2014-09-25 2017-10-19 Eaton Corporation Composite molded rotary component
US10630121B1 (en) * 2015-09-23 2020-04-21 Regal Beloit America, Inc. Rigid rotor structures for conical air gap electrodynamic machines

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