Variable-speed speed increaser

Patent metadata

Field	Value
Publication number	US-10680539-B2
Application number	US-201616078944-A
Country	US
Kind code	B2
Filing date	Feb 26, 2016
Priority date	Feb 26, 2016
Publication date	Jun 9, 2020
Grant date	Jun 9, 2020

Abstract

A variable-speed speed increaser includes: an electric driving device which is configured to generate a rotational driving force; and a transmission device which is configured to change the speed of the rotational driving force generated by the electric driving device and transmit the changed rotation driving force to a driving target. The transmission device includes: a sun gear which is configured to rotate about an axis; a sun gear shaft which is fixed to the sun gear and extends in an axial direction around the axis; a planetary gear which is configured to mesh with the sun gear, revolve around the axis and rotate about a center line of the planetary gear; an internal gear which includes a plurality of teeth aligned annularly around the axis and is configured to mesh with the planetary gear; a planetary gear carrier; and an internal gear carrier.

First claim

The invention claimed is:

1. A variable-speed speed increaser comprising:
an electric driver which is configured to generate a rotational driving force; and
a transmitter which is configured to change the speed of the rotational driving force generated by the electric driver and transmit the changed rotation driving force to a driving target,
wherein the transmitter comprises:
a sun gear which is configured to rotate about an axis;
a sun gear shaft which is fixed to the sun gear and extends in an axial direction around the axis;
a planetary gear which is configured to mesh with the sun gear, revolve around the axis and rotate about a center line of the planetary gear;
an internal gear which comprises a plurality of teeth aligned annularly around the axis and is configured to mesh with the planetary gear;
a planetary gear carrier which has a planetary gear carrier shaft extending in the axial direction around the axis and is configured to support the planetary gear to allow the planetary gear to revolve around the axis and to rotate about a center line of the planetary gear; and
an internal gear carrier which comprises an internal gear carrier shaft extending in the axial direction around the axis and is configured to support the internal gear to allow the internal gear to be rotatable about the axis,

wherein the sun gear shaft forms an output shaft connected to the driving target, the internal gear carrier shaft forms a constant-speed input shaft, and the planetary gear carrier shaft forms a variable-speed input shaft, and
the electric driver comprises:
a variable-speed motor having a variable-speed rotor which is connected to the variable-speed input shaft of the transmitter and formed in a cylindrical shape centered on the axis with a shaft insertion hole passing therethrough in the axial direction;
a constant-speed motor having a constant-speed rotor which is connected to the constant-speed input shaft of the transmitter and inserted through the shaft insertion hole; and
first and second impellers that are installed on the variable-speed rotor such that the first impeller is provided on one side of a conductive body of the variable-speed motor in the axial direction and the second impeller is provided on the other side of the conductive body,

wherein the first and second impellers are formed so that directions of generated wind are opposite to each other in the axial direction while rotating the variable-speed rotor in a predetermined direction and cause windage loss with respect to each other by rotation of the variable-speed rotor in the predetermined direction.

2. The variable-speed speed increaser according to claim 1 , wherein the variable-speed motor comprises a variable-speed motor casing which is configured to rotatably support the variable-speed rotor, and the first and second impellers are disposed inside the variable-speed motor casing.

3. The variable-speed speed increaser according to claim 2 , further comprising a gas supplier which is configured to introduce a gas into an internal space of the variable-speed motor casing.

4. The variable-speed speed increaser according to claim 1 , further comprising a blower provided at the same position as the conductive body of the variable-speed motor in the axial direction and oriented so that generated wind is directed in the radial direction of the variable-speed rotor.

5. The variable-speed speed increaser according to claim 2 , further comprising a blower provided at the same position as the conductive body of the variable-speed motor in the axial direction and oriented so that generated wind is directed in the radial direction of the variable-speed rotor.

6. The variable-speed speed increaser according to claim 3 , further comprising a blower provided at the same position as the conductive body of the variable-speed motor in the axial direction and oriented so that generated wind is directed in the radial direction of the variable-speed rotor.

Assignees

• Mitsubishi Heavy Ind Compressor Corp

Inventors

• Okamoto Yoshiyuki

Classifications

• F04D25/06

  the pump being electrically driven (F04D25/08 takes precedence) · CPC title

• F16D57/02

  with blades or like members braked by the fluid · CPC title

• H02P5/753

  Differential gearing · CPC title

• H02K7/116

  with gears · CPC title

• H02K9/06

  with fans or impellers driven by the machine shaft · CPC title