JP2005237070A - Motor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve motor efficiency by making a force generated by a fluid that flows in a rotor and a rotation auxiliary member act as torque. <P>SOLUTION: The rotation auxiliary member 21 is installed on a rotor core 11 wherein at least two or more core penetration holes 13 that axially penetrate the core are formed, a passage hole 24 reaching a side face opposing a stator of the rotation auxiliary member 21 from a rotor core end side is formed, and an opening 24b of the rotational auxiliary member side face of the passage hole 24 is opened in the oblique direction with respect to the rotative direction of the rotor 10. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a motor provided in various devices such as a hermetic compressor.

  FIG. 3 shows a conventional motor, which includes a stator 30 and a rotor 40. FIG. 3 shows an example of a 4-pole 6-slot concentrated winding brushless motor. The rotor 40 is an embedded magnet type rotor in which a permanent magnet 44 is embedded in a rotor core 41.

  The stator core 31 is formed of teeth 32 radially provided on the inner diameter side thereof, and a substantially annular yoke 33 that connects the teeth 32 to each other.

  Further, the stator core 31 is formed with slots 34 equal to the number of teeth 32 by adjacent teeth 32 and yokes 33.

  The teeth 32 are provided with windings (not shown).

  The rotor 40 is rotatably held via a bearing attached to a shaft (not drawn) mounted in the shaft hole 42 concentrically with the stator 30.

  The rotor 40 rotates around the axis by a magnetic field generated by a current flowing in a winding applied to the stator 30.

  The rotor 40 includes various parts as required. For example, as shown in FIG. 4, the rotor core 41 is provided with a core through hole 43, and the oil mixed gas in the compressor is disposed at the axial end. There is one provided with an oil separator 45 for the purpose of separating oil from the oil (see, for example, Patent Document 1).

  Further, a compressor that uses a rotor 40 as shown in FIG. 4 to separate oil by colliding an oil mixed gas with an oil separator 45 has been proposed (see, for example, Patent Document 2). .

By setting it as such a structure, since oil mixed gas will collide strongly with the oil separator 45, the performance of an apparatus will improve.
JP 2001-218411 A JP 2001-280252 A

  However, in the above-described conventional rotor, when the oil mixed gas that has passed through the rotor core collides with the oil separator, the energy of the collision causes the oil separator to deform in the axial direction or displace the rotor in the axial direction. It was supposed to act as a force to try.

  Therefore, in such a motor, unnecessary force acting as a cause of increasing the bearing loss in the axial direction of the rotor is applied and energy is wasted.

  In view of the above, an object of the present invention is to improve motor efficiency by causing the energy of fluid (liquid, gas, liquid mixed gas, etc.) passing through the rotor to act as torque of the rotor. is there.

  In order to solve the above problems, a motor according to the present invention has a rotor having a rotation auxiliary member attached to an axial end portion of the rotor core, and the rotor core has at least two core through holes penetrating in the axial direction. The rotation auxiliary member is provided with a passage hole that leads from the rotor core end side to a side surface of the rotation auxiliary member facing the stator, and the rotor core end side opening of the passage hole is provided in the rotation auxiliary member. Is larger than the core through-hole, and the side opening of the rotation auxiliary member of the passage hole is opened obliquely with respect to the rotation direction of the rotor, and the core through-hole communicates with the passage hole. It is the composition which has.

  According to the first aspect of the present invention, the torque of the motor is increased, and a highly efficient motor can be obtained.

  According to the second aspect, the motor efficiency can be further increased.

  According to the invention which concerns on Claim 3, a highly efficient apparatus can be obtained.

  The invention according to claim 1 of the present application provides a stator including a substantially annular yoke, a stator core including a plurality of teeth disposed on an inner peripheral portion of the yoke, and a coil applied to the teeth. In a motor composed of a rotor that is opposed to the inner periphery with a small gap and is rotatably held, and a fluid passes through the rotor, the rotor is attached to the axial end of the rotor core. The rotor core is provided with at least two core through-holes penetrating in the axial direction, and the rotation auxiliary member is provided on the stator of the rotation auxiliary member from the rotor core end side. A passage hole leading to the opposite side surface is provided, and the rotor core end side opening of the passage hole is larger than the core through hole, and the rotation of the passage hole is performed. The auxiliary member side opening is a motor that is opened obliquely with respect to the rotation direction of the rotor, and the core through hole and the passage hole communicate with each other. Passed fluid (gas, liquid, liquid mixed gas, etc.) generates a force against the rotation assisting member when passing through the passage hole, and the passage hole is opened obliquely with respect to the rotation direction of the rotor. Therefore, the efficiency of the motor can be improved by increasing the torque of the motor by the force generated by the fluid acting as a rotational force.

  The invention according to claim 2 of the present application is the motor according to claim 1, wherein the passage hole is bent in the axial direction or the rotation direction inside the rotation auxiliary member, and the fluid that has passed through the core through hole When the gas (liquid, liquid or liquid mixed gas) passes through the passage hole, a force is generated against the rotation auxiliary member, and the passage hole is bent in the axial direction or the rotation direction inside the rotation auxiliary member. Therefore, the force generated by the fluid can be used more effectively as the rotational force, and the motor efficiency can be improved by increasing the torque of the motor.

  The invention according to claim 3 is a device comprising the motor according to claim 1 or 2, and can be a highly efficient device.

  FIG. 1 shows a rotor constituting a motor according to a specific example of the present invention. The configuration other than the rotor is the same as that of the conventional motor, and the description thereof is omitted.

  The rotor 10 includes at least a rotor core 11 that is a ferromagnetic material and a rotation auxiliary member 21, and a shaft (not shown) is inserted into the shaft hole 12 to rotate.

  The rotor core 11 is provided with at least two core through holes 13 penetrating in the axial direction. The rotation assisting member 21 is provided with a passage hole 24 leading from the rotor core end side end surface 22 to the rotation assisting member side surface 23.

  Here, the rotor core end side opening 24 a of the passage hole 24 is larger than the core through hole 13, and the rotation auxiliary member side opening 24 b opens obliquely with respect to the rotation direction of the rotor 10, and the core through hole 13 and the passage hole 24 communicate with each other.

  A fluid (such as gas, liquid, or liquid mixed gas) flows from the side of the rotor core 11 where the rotation assisting member 21 is not provided, passes through the core through hole 13, and reaches the passage hole 24.

  Since the rotor core end opening 24a of the passage hole 24 is larger than the core through hole 13, the flow resistance does not increase, and the fluid surely flows into the core through hole 13 and the passage hole 24. Will be.

  The fluid (such as gas, liquid, or liquid mixed gas) that has passed through the core through hole 13 generates a force on the rotation assisting member 21 when passing through the passage hole 24. That is, the rotation auxiliary member side surface opening 24b of the passage hole 24 is opened in an oblique direction with respect to the rotation direction of the rotor 10, so that the fluid flows out at a certain angle from the radial direction of the rotor 10 to the rotation direction. That is, the fluid force acts as a rotational force. Therefore, since the motor torque increases, the motor current decreases and the copper loss can be reduced, so that the motor efficiency can be improved.

  An arbitrary torque increase can be obtained by adjusting the angle of the rotation assisting member side surface opening 24b with respect to the rotation direction according to the motor configuration. However, in order to increase the torque, the fluid moves in the rotation direction of the rotor 10. It is desirable to flow out in a tangential direction with respect to.

  Further, as the shape of the passage hole 24, it is desirable that the passage hole 24 is continuously bent in the axial direction or the rotation direction inside the rotation auxiliary member 21 as shown in FIG. As shown in FIG. 1, in the case of a passage bent at an acute angle, an axial force is generated when the fluid collides with the inner wall surface of the passage hole 24, but the shape is as shown in FIG. 2. As a result, the axial force is relaxed, and a rotational force can be effectively obtained.

  Resin, metal, etc. can be used as the rotation assisting member 21, but it is manufactured by injection molding, casting, etc. by dividing it in the axial direction at the portion where the passage hole 24 extends in the radial direction and configuring it as a plurality of parts In this case, it can be easily manufactured.

  With the rotor configuration according to the present invention, a highly efficient motor can be obtained, which is useful for mounting on equipment that requires high efficiency.

Rotor diagram in an embodiment of the present invention Other types of rotor diagrams in embodiments of the present invention Sectional view of a motor in a conventional concentrated winding brushless motor Conventional rotor diagram

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Rotor 11 Rotor core 12 Shaft hole 13 Core through-hole 21 Rotation auxiliary member 22 End surface of rotor auxiliary | assistant part of rotation auxiliary member 23 Side surface of rotation auxiliary member 24 Passage hole 24a Opening part of rotor core end of rotation auxiliary member 24b Rotation auxiliary member side surface opening

Claims (3)

A substantially annular yoke, a stator core composed of a plurality of teeth disposed on the inner peripheral portion of the yoke, and a stator composed of a coil applied to the teeth are opposed to the inner periphery of the stator via a slight gap. In the motor comprising a rotor that is rotatably held and allows fluid to pass through the rotor, the rotor includes a rotation auxiliary member attached to an axial end of the rotor core. , At least two core through holes penetrating in the axial direction are provided, and the rotation assisting member is provided with a passage hole leading from the rotor core end side to a side surface of the rotation assisting member facing the stator. The rotor core end side opening of the passage hole is larger than the core through-hole, and the rotation auxiliary member side opening of the passage hole is Is open in an oblique direction with respect to the rotation direction of the motor, the motor and the core through hole and the passage hole is characterized in that in communication. The motor according to claim 1, wherein the passage hole is bent in the axial direction or the rotation direction inside the rotation auxiliary member. An apparatus comprising the motor according to claim 1.

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