Turbo compressor and turbo refrigerating machine

Patent metadata

Field	Value
Publication number	US-10227995-B2
Application number	US-201414903232-A
Country	US
Kind code	B2
Filing date	Jul 8, 2014
Priority date	Jul 10, 2013
Publication date	Mar 12, 2019
Grant date	Mar 12, 2019

Abstract

Provided are a turbo compressor which is provided with an impeller rotating about a rotating shaft, and a seal part having a facing portion which faces an outer diameter portion of a hub of the impeller in a radial direction, in which a shunting groove for foreign matter which has infiltrated between the outer diameter portion and the facing portion is formed in the seal part, and a turbo refrigerating machine which is provided with the turbo compressor.

First claim

The invention claimed is:

1. A turbo compressor comprising:
an impeller which rotates about a rotating shaft; and
a fixed member which is provided with a facing portion which faces an outer diameter portion of a hub of the impeller in a radial direction,
wherein a shunting groove for foreign matter which has infiltrated between the outer diameter portion and the facing portion is formed in the fixed member,
the shunting groove is a countersink for a screw member fixing the fixed member, and
the countersink is formed around a through-hole into which the screw member is inserted.

2. The turbo compressor according to claim 1 , wherein the shunting groove is partially formed in the facing portion of the fixed member.

3. The turbo compressor according to claim 1 , wherein the fixed member is a labyrinth seal which seals the back side of the impeller.

4. The turbo compressor according to claim 1 , wherein a plurality of the shunting grooves are formed, and
the shunting groove which is located on the lowermost side relative to direction of gravity, among the plurality of shunting grooves, is formed to be larger than the other shunting grooves.

5. The turbo compressor according to claim 1 , wherein the impeller and the fixed member are formed of the same materials.

6. A turbo refrigerating machine comprising:
a condenser which liquefies a compressed refrigerant;
an evaporator which evaporates the refrigerant liquefied by the condenser, thereby cooling a cooling object; and
the turbo compressor according to claim 1 , which compresses the refrigerant evaporated by the evaporator and supplies the compressed refrigerant to the condenser.

7. The turbo compressor according to claim 1 , wherein
the shunting groove is a groove partially formed in the facing portion of the fixed member.

8. A turbo compressor comprising:
an impeller which rotates about a rotating shaft; and
a fixed member which is provided with a facing portion which faces an outer diameter portion of a hub of the impeller in a radial direction,
wherein a shunting groove for foreign matter which has infiltrated between the outer diameter portion and the facing portion is formed in the fixed member,
the shunting groove is partially formed in the facing portion of the fixed member,
the fixed member is a labyrinth seal which seals the back side of the impeller,
the shunting groove is a countersink for a screw member fixing the fixed member, and
the countersink is formed around a through-hole into which the screw member is inserted.

9. A turbo compressor comprising:
an impeller which rotates about a rotating shaft; and
a fixed member which is provided with a facing portion which faces an outer diameter portion of a hub of the impeller in a radial direction,
wherein a shunting groove for foreign matter which has infiltrated between the outer diameter portion and the facing portion is formed in the fixed member,
the shunting groove is partially formed in the facing portion of the fixed member, and
the shunting groove is a countersink for a screw member fixing the fixed member, and
the countersink is formed around a through-hole into which the screw member is inserted.

10. A turbo compressor comprising:
an impeller which rotates about a rotating shaft; and
a fixed member which is provided with a facing portion which faces an outer diameter portion of a hub of the impeller in a radial direction,
wherein a shunting groove for foreign matter which has infiltrated between the outer diameter portion and the facing portion is formed in the fixed member,
the shunting groove is partially formed in the facing portion of the fixed member,
the shunting groove is a countersink for a screw member fixing the fixed member,
a plurality of the shunting grooves are formed, and
the shunting groove which is located on the lowermost side relative to direction of gravity, among the plurality of shunting grooves, is formed to be larger than the other shunting grooves.

11. A turbo compressor comprising:
an impeller which rotates about a rotating shaft; and
a fixed member which is provided with a facing portion which faces an outer diameter portion of a hub of the impeller in a radial direction,
wherein a shunting groove for foreign matter which has infiltrated between the outer diameter portion and the facing portion is formed in the fixed member,
the shunting groove is partially formed in the facing portion of the fixed member,
a plurality of the shunting grooves are formed, and
the shunting groove which is located on the lowermost side relative to direction of gravity, among the plurality of shunting grooves, is formed to be larger than the other shunting grooves.

12. A turbo compressor comprising:
an impeller which rotates about a rotating shaft; and
a fixed member which is provided with a facing portion which faces an outer diameter portion of a hub of the impeller in a radial direction,
wherein a shunting groove for foreign matter which has infiltrated between the outer diameter portion and the facing portion is formed in the fixed member,
the shunting groove is partially formed in the facing portion of the fixed member,
the fixed member is a labyrinth seal which seals the back side of the impeller,
the shunting groove is a countersink for a screw member fixing the fixed member,
a plurality of the shunting grooves are formed, and
the shunting groove which is located on the lowermost side relative to direction of gravity, among the plurality of shunting grooves, is formed to be larger than the other shunting grooves.

13. A turbo compressor comprising:
an impeller which rotates about a rotating shaft; and
a fixed member which is provided with a facing portion which faces an outer diameter portion of a hub of the impeller in a radial direction,
wherein a shunting groove for foreign matter which has infiltrated between the outer diameter portion and the facing portion is formed in the fixed member,
the shunting groove is partially formed in the facing portion of the fixed member,
the fixed member is a labyrinth seal which seals the back side of the impeller,
a plurality of the shunting grooves are formed, and
the shunting groove which is located on the lowermost side relative to direction of gravity, among the plurality of shunting grooves, is formed to be larger than the other shunting grooves.

14. A turbo compressor comprising:
an impeller which rotates about a rotating shaft; and
a fixed member which is provided with a facing portion which faces an outer diameter portion of a hub of the impeller in a radial direction,
wherein a shunting groove for foreign matter which has infiltrated between the outer diameter portion and the facing portion is formed in the fixed member,
the fixed member is a labyrinth seal which seals the back side of the impeller,
the shunting groove is a countersink for a screw member fixing the fixed member,
a plurality of the shunting grooves are formed, and
the shunting groove which is located on the lowermost side relative to direction of gravity, among the plurality of shunting grooves, is formed to be larger than the other shunting grooves.

15. A turbo compressor comprising:
an impeller which rotates about a rotating shaft; and
a fixed member which is provided with a facing portion which faces an outer diameter portion of a hub of the impeller in a radial direction,
wherein a shunting groove for foreign matter which has infiltrated between the outer diameter portion and the facing portion is formed in the fixed member,
the fixed member is a labyrinth seal which seals the ba

Assignees

• Daikin Ind Ltd

Inventors

• Oda Kentarou
• Sakuma Nobuyoshi

Classifications

• F04D25/06

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

• F25B2400/23

  Separators · CPC title

• F04D29/289

  having provision against erosion or for dust-separation · CPC title

• F04D17/10

  for compressing or evacuating · CPC title

• F05D2260/607

  Preventing clogging or obstruction of flow paths by dirt, dust, or foreign particles · CPC title