Unbalance detection device, and unbalance detection method

Patent metadata

Field	Value
Publication number	US-11029230-B2
Application number	US-201616303058-A
Country	US
Kind code	B2
Filing date	May 26, 2016
Priority date	May 26, 2016
Publication date	Jun 8, 2021
Grant date	Jun 8, 2021

Abstract

An unbalance detection device for detecting unbalance of a rotor of a turbo-cartridge which includes the rotor including a turbine wheel and a compressor wheel coupled via a rotational shaft and a bearing housing accommodating a bearing which supports the rotor rotatably, includes: a turbine-side housing member accommodating the turbine wheel; a compressor-side housing member accommodating the compressor wheel; a support mechanism configured to nip and support the turbo-cartridge from both sides by pressing at least one of the turbine-side housing member or the compressor-side housing member toward the turbo-cartridge; a vibration insulator interposed in each of a gap between the turbine-side housing member and the turbo-cartridge and a gap between the compressor-side housing member and the turbo-cartridge; and a vibration sensor installed so as to be contactable with the bearing housing, the vibration sensor being capable of detecting vibration upon rotation of the rotor.

First claim

The invention claimed is:

1. An unbalance detection device for detecting unbalance of a rotor of a turbo-cartridge which includes the rotor including a turbine wheel and a compressor wheel coupled via a rotational shaft and a bearing housing accommodating a bearing which supports the rotor rotatably, the unbalance detection device comprising:
a turbine-side housing accommodating the turbine wheel;
a compressor-side housing accommodating the compressor wheel;
a support mechanism configured to nip and support the turbo-cartridge from both sides by pressing at least one of the turbine-side housing or the compressor-side housing toward the turbo-cartridge, the support mechanism including a pressing rod and a piston device configured to push the pressing rod;
a vibration insulator interposed in each of a gap between the turbine-side housing and the turbo-cartridge and a gap between the compressor-side housing and the turbo-cartridge;
a vibration sensor installed so as to be contactable with the bearing housing, the vibration sensor detecting vibration upon rotation of the rotor; and
a biasing member configured to bias the vibration sensor toward the bearing housing, the biasing member being an elastic member,
wherein the unbalance detection device further comprises an oil supply pipe for supplying lubricant oil into the bearing housing, the oil supply pipe being selectively connected to and separated from an oil supply port formed on the bearing housing, and
wherein the biasing member is installed on the oil supply pipe so that the vibration sensor is biased toward the bearing housing in a state where the oil supply pipe is connected to the oil supply port formed on the bearing housing,
wherein the bearing housing includes a sensor contact mount having a flat surface that makes contact with the vibration sensor, and
wherein the oil supply pipe includes an oil-supply-pipe vibration insulator disposed on a portion of the oil supply pipe connected to the oil supply port, the oil-supply-pipe vibration insulator being configured to reduce vibration transmitted between the oil supply pipe and the turbo-cartridge.

2. The unbalance detection device according to claim 1 ,
wherein the turbo-cartridge is supported by the support mechanism in a state where the turbo-cartridge is in contact with the vibration insulator while not being in contact with the turbine-side housing and the compressor-side housing.

3. The unbalance detection device according to claim 1 , further comprising:
a sensor installation device for installing the vibration sensor to the oil supply pipe,
wherein the sensor installation device includes:
a support base supporting the vibration sensor on a first surface of the support base; and
a guide member fixed to the oil supply pipe and configured to guide the support base in a direction along a normal direction of an opening plane of the oil supply port, the guide member having a guiding portion extending in the direction along the normal direction, and

wherein the biasing member is configured to bias the vibration sensor toward the bearing housing by being in contact with a second surface of the support base.

4. The unbalance detection device according to claim 3 ,
wherein the vibration sensor is supported on a surface of the support base via a sensor-side vibration insulator.

5. The unbalance detection device according to claim 1 ,
wherein the oil supply port faces upward in a state where the turbo-cartridge is supported by the support mechanism, and
wherein the biasing member is configured to bias the vibration sensor downward in a state where the oil supply pipe is connected to the oil supply port.

6. The unbalance detection device according to claim 1 ,
wherein the sensor contact mount is configured such that a normal direction of an opening plane of the oil supply port and a normal direction of the sensor contact mount are the same.

7. An unbalance detection device for detecting unbalance of a rotor of a turbo-cartridge which includes the rotor including a turbine wheel and a compressor wheel coupled via a rotational shaft and a bearing housing accommodating a bearing which supports the rotor rotatably, the unbalance detection device comprising:
a turbine-side housing accommodating the turbine wheel;
a compressor-side housing accommodating the compressor wheel;
a support mechanism configured to nip and support the turbo-cartridge from both sides by pressing at least one of the turbine-side housing or the compressor-side housing toward the turbo-cartridge, the support mechanism including a pressing rod and a piston device configured to push the pressing rod;
a vibration insulator interposed in each of a gap between the turbine-side housing and the turbo-cartridge and a gap between the compressor-side housing and the turbo-cartridge;
a vibration sensor installed so as to be contactable with the bearing housing, the vibration sensor detecting vibration upon rotation of the rotor; and
a biasing member configured to bias the vibration sensor toward the bearing housing, the biasing member being an elastic member,
wherein the unbalance detection device further comprises an oil supply pipe for supplying lubricant oil into the bearing housing, the oil supply pipe being selectively connected to and separated from an oil supply port formed on the bearing housing,
wherein the biasing member is installed on the oil supply pipe so that the vibration sensor is biased toward the bearing housing in a state where the oil supply pipe is connected to the oil supply port formed on the bearing housing,
wherein the unbalance detection device further comprises a sensor installation device for installing the vibration sensor to the oil supply pipe,
wherein the sensor installation device includes:
a support base supporting the vibration sensor on a first surface of the support base; and
a guide member fixed to the oil supply pipe and configured to guide the support base in a direction along a normal direction of an opening plane of the oil supply port, the guide member having a guiding portion extending in the direction along the normal direction,

wherein the biasing member is configured to bias the vibration sensor toward the bearing housing by being in contact with a second surface of the support base,
wherein the guide member includes a body portion having a tubular shape and a bottom portion formed on a first end side of the body portion,
wherein the support base is accommodated in the body portion so as to be slidable,
wherein the biasing member is accommodated between the bottom portion and the second surface of the support base, in the body portion, and
wherein, on a second end side of the body portion, a lock being configured to prevent the support base from falling out from the body portion is disposed.

8. The unbalance detection device according to claim 7 ,
wherein the vibration sensor is supported on a surface of the support base via a sensor-side vibration insulator.

9. The unbalance detection device according to claim 7 ,
wherein the oil supply port faces upward in a state where the turbo-cartridge is supported by the support mechanism, and
wherein the biasing member is configured to bias the vibration sensor downward in a state where the oil supply pipe is connected to the oil supply port.

10. The unbalance detection device according to claim 7 ,
wherein the bearing housing includes a sensor contact mount having a flat surface shape, for being in contact with the vibration sensor, and
wherein the sensor contact mount is configured such that a normal direction of an opening plane of the oil supply port and a normal direction of the sensor contact mount are the sa

Assignees

• Mitsubishi Heavy Ind Engine & Turbocharger Ltd

Inventors

• Yamashita Katsuya
• Miura Shuichi
• Dammoto Yosuke
• Futae Takaya
• Yoshikawa Shota

Classifications

• F01D5/027 Primary

  Arrangements for balancing (for balancing rotating bodies in general F16F15/32; for compensating imbalance G01M1/36) · CPC title

• G01M1/16

  by oscillating or rotating the body to be tested · CPC title

• F05D2220/40

  in turbochargers · CPC title

• F02B39/16 Primary

  Other safety measures for, or other control of, pumps · CPC title

• G01M1/22

  and converting vibrations due to imbalance into electric variables · CPC title