KR20110087522A - Compressor with providing thrust reduction - Google Patents

Compressor with providing thrust reduction Download PDF

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Publication number
KR20110087522A
KR20110087522A KR1020100006978A KR20100006978A KR20110087522A KR 20110087522 A KR20110087522 A KR 20110087522A KR 1020100006978 A KR1020100006978 A KR 1020100006978A KR 20100006978 A KR20100006978 A KR 20100006978A KR 20110087522 A KR20110087522 A KR 20110087522A
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KR
South Korea
Prior art keywords
impeller
coupled
compressor
seal part
bearing
Prior art date
Application number
KR1020100006978A
Other languages
Korean (ko)
Other versions
KR101171469B1 (en
Inventor
유원일
Original Assignee
엘지전자 주식회사
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Publication date
Application filed by 엘지전자 주식회사 filed Critical 엘지전자 주식회사
Priority to KR20100006978A priority Critical patent/KR101171469B1/en
Publication of KR20110087522A publication Critical patent/KR20110087522A/en
Application granted granted Critical
Publication of KR101171469B1 publication Critical patent/KR101171469B1/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/002—Details, component parts, or accessories especially adapted for elastic fluid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/05—Shafts or bearings, or assemblies thereof, specially adapted for elastic fluid pumps
    • F04D29/053—Shafts
    • F04D29/054—Arrangements for joining or assembling shafts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/08—Sealings
    • F04D29/083—Sealings especially adapted for elastic fluid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/08—Sealings
    • F04D29/10—Shaft sealings
    • F04D29/102—Shaft sealings especially adapted for elastic fluid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/403—Casings; Connections of working fluid especially adapted for elastic fluid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/44—Fluid-guiding means, e.g. diffusers
    • F04D29/441—Fluid-guiding means, e.g. diffusers especially adapted for elastic fluid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
    • F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
    • F04D29/667—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps by influencing the flow pattern, e.g. suppression of turbulence
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2210/00—Working fluids
    • F05D2210/10—Kind or type
    • F05D2210/12—Kind or type gaseous, i.e. compressible
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2260/00—Function
    • F05D2260/60—Fluid transfer
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S415/00—Rotary kinetic fluid motors or pumps

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

PURPOSE: A compressor with a thrust reduction function is provided to prevent an oil leak and an unstable pressure change by inserting the end of an impeller inside a seal part. CONSTITUTION: A compressor with a thrust reduction function comprises a casing(12), a rotary shaft(14), a bearing(20), and an oil slinger(18). An oil tank(22) and an impeller(16) are arranged inside the casing. The rotary shaft, coupled to the impeller, is installed inside a casing. The bearing is coupled to the rotary shaft and is rotated. The oil slinger is arranged between the impeller and the bearing and is coupled to the rotary shaft. A seal part(24) between the bearing and the impeller is coupled to the oil slinger. The end of the impeller is inserted into a housing unit formed on one surface of the seal part.

Description

Compressor With Providing Thrust Reduction

The present invention relates to a compressor having a thrust reduction function, and more particularly, to reduce the thrust due to the high pressure formed in the back plate portion of the impeller as a new structure type of the inner peripheral surface of the seal part facing the outlet end of the impeller By improving and inducing the pressure drop at the outlet end of the impeller, it is possible to increase the compression efficiency and performance of the compressor.

In general, the centrifugal compressor used in a refrigerating device, an air conditioner, a heat pump, or the like has an impeller that is directly connected to a motor or coupled to a rotating shaft engaged with a gearbox, and rotates at a high speed. Exerts the function to compress the incoming refrigerant.

In addition, due to the high speed rotation of the impeller, high pressure is formed on the front plate portion of the impeller on the inlet side and the corresponding impeller, and the aerodynamic thrust is formed on the back plate portion of the impeller due to the high pressure. When such a thrust is generated, the impeller's vibration flow and resistance to rotational drive are generated, resulting in a lot of losses in the impeller's rotational drive, thereby degrading the compression capacity and performance of the compressor.

Therefore, in order to solve the above problems, in the conventional compressor, one or more balance holes penetrating the rear and front of the impeller are formed in the impeller, thereby leaking the pressure formed in the back plate of the impeller to the front plate of the impeller, that is, the inlet side. The pressure formed in the back plate has been lowered and the thrust thus reduced.

However, when the balance hole for reducing the thrust is formed in the impeller and leaks the pressure formed in the impeller back plate to the inlet side, which is the front plate part of the impeller, as in the prior art, the injection pressure for the refrigerant to be introduced into the inlet side, which is the front plate part of the impeller, leaks. It causes flow disturbance, which makes the inflow of refrigerant unstable and also makes the inflow pressure of refrigerant unstable, and the oil leaks through the balance hole and mixes with refrigerant, resulting in compression efficiency and compression performance. There was a problem of this deterioration.

The present invention has been invented to solve the conventional problems as described above, a new structure type to the inner peripheral surface of the seal part facing the outlet end of the impeller to reduce the thrust due to the high pressure formed in the back plate of the impeller By improving the pressure at the outlet end of the impeller and reducing the flow disturbance and unstable pressure change and balance hole at the impeller inlet, which occurred in the conventional structural type of forming the balance hole in the impeller for thrust attenuation. It is an object of the present invention to provide a compressor having a thrust reduction function to solve all the oil leakage through, thereby increasing the compression efficiency and compression performance of the compressor.

The present invention is a rotating shaft installed in the state coupled to the impeller in the casing is provided with an oil tank and the impeller, the bearing is coupled to the rotating shaft to smoothly rotate, and is disposed between the impeller and the bearing In the compressor consisting of an oil slinger coupled to the rotary shaft, the seal part is coupled between the bearing and the impeller in a state surrounding the outer surface of the oil slinger, and the receiving end formed on one side of the seal part has an outlet end of the impeller. It is coupled in the inserted state, the pressure drop portion for reducing the pressure formed at the outlet end portion on the inner circumferential surface of the receiving end corresponding to the outlet side of the impeller has a thrust reduction function is formed with a gap with the outlet side end of the impeller A compressor is provided.

In addition, it is preferable that the above pressure drop portion has a structure in which a plurality of concave recessed portions and convexly projected iron portions are alternately arranged. Furthermore, the gap between the outlet side end of the impeller and the convex portion of the pressure drop is preferably 0.05 mm to 0.2 mm.

It is preferable that the said seal part consists of a labyrinth seal part.

As described above, the present invention is coupled in a state where the outlet end of the impeller is inserted into the seal part, and the pressure lowered at the outlet end of the impeller is formed on the inner circumferential surface of the seal part facing the outlet end of the impeller. By presenting the structure in which the pressure drop is formed, all of the flow disturbance at the inlet side of the impeller, unstable pressure change and oil leakage through the balance hole are eliminated, thereby improving the compression efficiency and performance of the compressor. You can expect the effect.

1 is a sectional view showing main parts of a compressor having a thrust reduction function according to the present invention.
FIG. 2 is an enlarged view illustrating part A of FIG. 1.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a sectional view showing main parts of a compressor having a thrust reduction function according to the present invention, and FIG. 2 is an enlarged view of part A of FIG. 1.

As shown in the figure, the inside of the casing 12 of the compressor 10 has a rotating shaft 14 which is rotated by a driving force of a driving source (for example, a structure directly connected to a motor or connected through an increase gear). It is arranged horizontally in a rotatable state, and the impeller 16 is coupled to one end of the rotary shaft 14 so as to interlock.

In addition, an oil slinger 18 is coupled to the rotary shaft 14 in a state in which an oil slinger 18 surrounds the rotary shaft 14 on the rear plate of the impeller 16 corresponding to the arrow direction in which the refrigerant flows.

In addition, the casing 12 of the compressor 10 may be supplied to rotating machinery such as a speed increaser and a bearing 20 that are commonly provided so that oil (lubricating oil), which is lubricated, may be recovered, stored, and supplied. An oil tank 22 is provided.

In the compressor 10 configured as described above, the present invention is coupled to the structure surrounding the outer surface of the oil slinger 18, the seal part 24 between the bearing 20 and the impeller 16 coupled to the rotary shaft 14 The outlet end 28 of the impeller 16 is inserted into and coupled to the receiving portion 26 formed on one side of the seal part 24. This seal part 24 consists of a labyrinth seal part.

 In addition, a pressure drop 30 for pressure drop is formed on the inner circumferential surface of the receiving portion 26 of the seal part 24 facing the outlet end 28 of the impeller 16. In the accompanying drawings, the pressure drop 30 is formed in a sawtooth structure, but is not limited thereto. For example, as long as the concave-concave concave portion 32 and the convexly projected convex portion 34 are alternately arranged in a concave-convex shape, any shape and structure may be used.

In addition, the pressure drop 30 has a gap (L) between the convex portion 34 and the outlet end 28 of the impeller 16, the gap (L) preferably forms a 0.05mm ~ 0.2mm Do. For example, when the gap L is 0.05 mm or less, the flow is not very desired along the pressure drop 30, and when the gap L is 0.2 mm or more, the flow is too much, so that the pressure change and induction for the pressure drop is too great. It does not work properly.

Therefore, when the compressor having a thrust reduction function according to the present invention is used, the compressed air formed at the outlet end 28 of the impeller 16 due to the high speed rotation of the impeller 16, first, the pressure drop 30 The flow is scattered by the uneven structure of the < RTI ID = 0.0 >), < / RTI > and prevents the pressure rise. As the pressure-intensifying action is performed repeatedly to decrease the pressure due to the expansion space of), high pressure is not formed in the back plate portion of the impeller 16, thereby reducing the thrust.

In addition, when the compressor having a thrust reduction function according to the present invention is used, the thrust formed in the back plate portion of the impeller 16 can be reduced only by the pressure drop formed in the seal part to which the impeller 16 is received. By doing so, it is possible to solve the flow disturbance and unstable pressure change and the oil leakage through the balance hole of the inlet side S of the impeller 16 generated in the conventional structure type, that is, the structure of forming the balance hole in the impeller.

Although the present invention has been described for the embodiments of the present invention based on the accompanying drawings for convenience, it is obvious that various modifications and changes are possible within the scope of the technical idea of the present invention.

10 compressor 12 casing
14: shaft 16: impeller
18: oil slinger 20: bearing
22: oil tank 24: seal parts
26: accommodating part 28: outlet side end portion
30: pressure drop 32: main part
34: iron

Claims (4)

Rotating shaft installed in the state coupled with the impeller in the casing is provided with the oil tank and the impeller, a bearing coupled to the rotating shaft for smooth rotation, and coupled to the rotating shaft in a state disposed between the impeller and the bearing In the compressor consisting of an oil slinger,
Seal parts are coupled between the bearing and the impeller in a state surrounding the outer surface of the oil slinger,
The receiving portion formed on one side of the seal part is coupled to the outlet end of the impeller is inserted,
And a pressure drop for lowering the pressure formed at the outlet end on the inner circumferential surface of the accommodating portion corresponding to the outlet end of the impeller and having a gap with the outlet end of the impeller.
The method of claim 1,
The pressure drop unit has a thrust reduction function, characterized in that the concave recessed concave portion and convexly projected convex portions are arranged in a plurality of alternating arrangement.
The method of claim 2,
And a clearance between the outlet side end of the impeller and the convex portion of the pressure drop is 0.05 mm to 0.2 mm.
4. The method according to any one of claims 1 to 3,
The seal part is a compressor having a thrust reduction function, characterized in that the labyrinth seal part.
KR20100006978A 2010-01-26 2010-01-26 Compressor With Providing Thrust Reduction KR101171469B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR20100006978A KR101171469B1 (en) 2010-01-26 2010-01-26 Compressor With Providing Thrust Reduction

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR20100006978A KR101171469B1 (en) 2010-01-26 2010-01-26 Compressor With Providing Thrust Reduction

Publications (2)

Publication Number Publication Date
KR20110087522A true KR20110087522A (en) 2011-08-03
KR101171469B1 KR101171469B1 (en) 2012-08-06

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Publication number Priority date Publication date Assignee Title
KR102567992B1 (en) 2021-08-09 2023-08-18 터보윈 주식회사 Compressor for thrust reduction

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