KR20170088021A - Scroll compressor - Google Patents

Scroll compressor Download PDF

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Publication number
KR20170088021A
KR20170088021A KR1020160007855A KR20160007855A KR20170088021A KR 20170088021 A KR20170088021 A KR 20170088021A KR 1020160007855 A KR1020160007855 A KR 1020160007855A KR 20160007855 A KR20160007855 A KR 20160007855A KR 20170088021 A KR20170088021 A KR 20170088021A
Authority
KR
South Korea
Prior art keywords
bearing
tube
insertion portion
bearing tube
cover
Prior art date
Application number
KR1020160007855A
Other languages
Korean (ko)
Inventor
이재영
성하언
Original Assignee
유진기공산업주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 유진기공산업주식회사 filed Critical 유진기공산업주식회사
Priority to KR1020160007855A priority Critical patent/KR20170088021A/en
Priority to PCT/KR2016/001390 priority patent/WO2017126732A1/en
Publication of KR20170088021A publication Critical patent/KR20170088021A/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
    • F04C18/02—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
    • F04C18/02—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents
    • F04C18/0207—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents both members having co-operating elements in spiral form
    • F04C18/0215—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents both members having co-operating elements in spiral form where only one member is moving
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/04—Heating; Cooling; Heat insulation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2240/00—Components
    • F04C2240/50—Bearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2240/00—Components
    • F04C2240/50—Bearings
    • F04C2240/54—Hydrostatic or hydrodynamic bearing assemblies specially adapted for rotary positive displacement pumps or compressors

Abstract

According to the present invention, a scroll compressor comprises: a bearing tube; a driving shaft penetrating through the bearing tube; a bearing interposed between the bearing tube and the driving shaft; and a bearing cover fixing the bearing to the bearing tube. Therefore, as the bearing adheres to the bearing tube by the bearing cover, even if heat expansion of the bearing tube occurs, rotation or departure of the bearing can be restricted.

Description

[0001] SCROLL COMPRESSOR [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a scroll compressor, and more particularly, to a scroll compressor that suppresses deformation due to rotation of a drive shaft and a bearing.

Generally, a scroll compressor includes a fixed scroll having an orbiting scroll supported on an eccentric shaft portion of a drive shaft, and an end plate having a stationary wrap.

The orbiting wrap on the orbiting end plate of the orbiting scroll engages with the stationary wrap to form a sealed chamber between the stationary wrap and the orbiting wrap.

The scroll compressor also has a self-rotation preventing mechanism for preventing the orbiting scroll from rotating about its axis.

The eccentric shaft portion of the drive shaft and the rotation preventing device are used to eccentrically rotate the orbiting scroll to gradually reduce the volume in the sealed chamber toward the central portion and gradually increase the volume in the sealed chamber away from the central portion And is discharged from the outer peripheral portion under reduced pressure.

A representative example of such a scroll compressor is disclosed in Patent Document 1 (hereinafter referred to as " Prior Art 1 ").

However, in the scroll compressor of the prior art 1, the bearing tube supporting the bearing provided on the drive shaft is integrally formed in the housing.

Accordingly, when the housing is formed of an aluminum alloy, the bearing tube is thermally expanded at the time of driving the scroll compressor, so that the bearing supporting force is weakened, so that the ball bearing rotates in the bearing tube.

In order to solve such a problem, a scroll compressor in which the housing is made of aluminum alloy and the bearing tube is made of cast iron is disclosed in Patent Document 2 (hereinafter referred to as "Prior Art 2").

However, in the scroll compressor of the conventional art 2, since the bearing tube supporting the drive shaft is detachably assembled to the housing, and the bearing tube is fixed to the housing by bolts, there is a problem that the number of assembling holes increases.

Moreover, the manufacturing cost of the scroll compressor increases with the increase in the total number of machining operations, such as machining of bolt fastening portions of the housing and the bearing tube.

In the following Patent Document 3 (hereinafter referred to as "Prior Art 3"), a scroll compressor in which a bearing tube is made of a cast iron and a housing is made of aluminum is made of different materials, and the bearing tube is integrally formed at the time of aluminum die casting of the housing .

However, in the prior art 3, since the housing of the aluminum material is thermally expanded at the time of the operation of the scroll compressor, the force for supporting the bearing tube is weakened, and thus the rotation of the bearing tube occurs.

Therefore, development of a scroll compressor which is improved in the problem caused by thermal expansion of the bearing tube is required.

Japanese Patent Application Laid-Open No. 2007-0049556 (2007.05.11) Patent Document No. 2006-0045343 (2006.05.17) Japanese Patent Application Laid-Open No. 10-1535175 (May 5, 2015)

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems of the related art, and an object of the present invention is to provide a scroll compressor which suppresses rotation of a bearing due to thermal expansion.

Another object of the present invention is to provide a scroll compressor for discharging heat generated from a bearing and a drive shaft to the outside of a bearing tube.

According to an aspect of the present invention, there is provided a scroll compressor including: a bearing tube; A driving shaft passing through the bearing tube; A bearing interposed between the bearing tube and the drive shaft; And a bearing cover for fixing the bearing to the bearing tube.

Further, the bearing tube is formed with a bearing insertion portion into which a bearing is inserted, and the bearing cover is formed so as to surround an outer circumferential surface of the bearing insertion portion.

In addition, the bearing insertion portion is formed with a bearing seating groove into which the bearing is inserted, and the bearing seating groove is formed to a depth such that the bearing protrudes from the end of the bearing insertion portion.

The bearing cover is divided into a pressing member which is in close contact with the bearing and a supporting member which is bent at the pressing member and surrounds the bearing inserting portion.

Further, the bearing insertion portion is formed with a coupling groove in which the support member is seated.

The bearing cover is formed of a material having a higher tensile strength than the bearing tube.

In addition, a cooling fan coupled to the drive shaft and rotating is provided, and the bearing tube is provided with a suction port and a discharge port.

Further, the inlet port is formed adjacent to the bearing on the housing side, and the outlet port is formed adjacent to the cooling fan, so that the cooling fan sucks the outside air through the inlet port and discharges the air to the outlet port.

According to the scroll compressor of the present invention, when the bearing is tightly attached to the bearing tube by the bearing cover, there is an effect of suppressing the rotation (rotation and disengagement) of the bearing even if thermal expansion of the bearing tube occurs.

Further, the bearing cover is formed so as to surround the outer peripheral surface of the bearing insertion portion, thereby suppressing thermal expansion of the bearing insertion portion.

Further, since the bearing cover is formed of a material having a higher tensile strength than the bearing tube, the thermal expansion of the bearing insertion portion is physically suppressed.

In addition, the bearing tube has a suction port and a discharge port, and sucks the outside air into the suction port by the rotation of the cooling fan, discharges the bearing tube through the discharge port, and discharges heat generated from the drive shaft and the bearing to the outside of the bearing tube.

1 is a cross-sectional view illustrating a scroll compressor according to the present invention.
2 is an enlarged view of a portion "a" of Fig.
3 is a perspective view showing the bearing cover of Fig. 1;
FIG. 4 is a perspective view showing the bearing tube of FIG. 1; FIG.

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

FIG. 1 is a cross-sectional view showing a scroll compressor according to the present invention, FIG. 2 is an enlarged view of a portion "a" of FIG. 1, FIG. 3 is a perspective view showing a bearing cover of FIG. 1, Fig.

1 to 4, a scroll compressor (C) according to the present invention includes a bearing tube (100) and a spiral fixed lap (100) which is closed at an open end in front of the bearing tube The orbiting scroll according to any one of claims 1 to 3, wherein the orbiting scroll (300) is formed with a spiral orbiting wrap (310) And a drive shaft 400 formed through the bearing tube 100 and formed to pass through the bearing tube 100.

First, the bearing tube 100 is formed to secure a space in which the above-described structures are mounted.

The orbiting scroll 310 of the orbiting scroll 300 is engaged with the stationary wrap 210 of the stationary scroll 200 so that a sealed chamber is formed between the stationary wrap 210 and the orbiting wrap 310 .

A bearing plate 320 is disposed behind the orbiting scroll 300.

The orbiting scroll 300 is provided with a crank-pin-type anti-rotation part 500 so that the orbiting scroll 300 can be rotated about the drive shaft 400 relative to the fixed scroll 200. [ To rotate eccentrically.

A bearing 600 is installed between the bearing tube 100 and the drive shaft 400.

Further, a bearing cover 700 for fixing the bearing 600 to the bearing tube 100 is further provided. The bearing tube 100 and the bearing cover 700 are fastened by bolts.

The cooling fan 800 is coupled to the driving shaft 400 and rotates.

Other structures of the conventional scroll compressor known in the art may be employed, so that a detailed description thereof will be omitted.

Hereinafter, the bearing tube 100 and the bearing cover 700 which are the main features of the present invention will be described in detail.

First, the bearing tube 100 is formed with a bearing insertion portion 110 into which a bearing 600 is inserted. The bearing cover 700 is formed to surround an outer circumferential surface of the bearing insertion portion 110.

The bearing insertion slot 110 is formed with a bearing seating groove 120 into which the bearing 600 is inserted and the bearing seating groove 120 is formed at a depth where the bearing 600 protrudes from the end of the bearing insertion portion .

Accordingly, the bearing 600 relatively protruding from the bearing insertion portion is pressed by the bearing cover 700 to suppress rotation (rotation, departure) due to thermal deformation of the bearing tube.

The bearing cover 700 is divided into a pressing member 710 which is in close contact with the bearing and a supporting member 720 which is formed by bending or bending in the pressing member 710 and which surrounds the bearing inserting portion 110. The support member 720 is formed thicker than the pressing member 710. [

Meanwhile, the bearing insertion portion 110 is formed with a coupling groove 111 in which the support member 720 is seated.

The bearing cover 700 is formed of a material having a higher tensile strength than that of the bearing tube 100. The material of the bearing cover is SMC45C having a tensile strength of 58 kgf / A GC250 of 25.5 kgf / mm2 is applied.

That is, as the bearing 600 is brought into close contact with the bearing insertion portion 110 of the bearing tube 100 by the bearing cover 700, thermal expansion of the bearing tube 100 due to rotation of the drive shaft and the bearing occurs (Rotation and disengagement) of the bearing 600 is suppressed.

In addition, the bearing cover 700 is formed so as to surround the outer circumferential surface of the bearing insertion portion 110, thereby suppressing thermal expansion of the bearing insertion portion 110.

Furthermore, since the bearing cover 700 is formed of a material having a higher tensile strength than the bearing tube 100, the thermal expansion of the bearing inserting portion 110 is physically suppressed.

The bearing tube 100 is formed with a suction port 101 and a discharge port 102. The suction port 101 is formed adjacent to the bearing 600 on the housing side and the discharge port 102 is connected to the cooling fan 800, So that the cooling fan 800 sucks outside air through the inlet 101 and discharges the air to the outlet 102 to discharge the heat generated from the bearing and the drive shaft to the outside of the bearing tube.

The suction port 101 and the discharge port 102 are formed along the outer circumferential surface of the bearing tube 100 and particularly at the lower end of the bearing tube 100 ) Is formed and the condensed water is discharged.

Although the preferred embodiments of the present invention have been described in detail, the technical scope of the present invention is not limited to the above-described embodiments, but should be construed according to the claims. It will be understood by those skilled in the art that many modifications and variations are possible without departing from the scope of the present invention.

C-scroll compressor 100 - bearing tube
200 - fixed scroll 300 - orbiting scroll
400 - drive shaft 500 -
600 - Bearing 700 - Bearing cover

Claims (8)

Bearing tube;
A driving shaft passing through the bearing tube;
A bearing interposed between the bearing tube and the drive shaft; And
And a bearing cover for fixing the bearing to the bearing tube. The method according to claim 1,
The bearing tube is formed with a bearing insertion portion into which a bearing is inserted,
Wherein the bearing cover is formed to surround an outer circumferential surface of the bearing insertion portion. 3. The method of claim 2,
Wherein the bearing insertion portion is formed with a bearing seating groove into which the bearing is inserted, and the bearing seating groove is formed to a depth such that the bearing protrudes from an end of the bearing insertion portion. The method according to claim 2 or 3,
Wherein the bearing cover is divided into a pressing member which is in close contact with the bearing and a supporting member which is bent at the pressing member and surrounds the bearing inserting portion. 5. The method of claim 4,
Wherein the bearing insertion portion is formed with a coupling groove in which the support member is seated. The method according to claim 1,
Wherein the bearing cover is formed of a material having a higher tensile strength than the bearing tube. The method according to claim 1,
A cooling fan coupled to the drive shaft and rotating,
Wherein the bearing tube is formed with a suction port and a discharge port. 8. The method of claim 7,
Wherein the suction port is formed adjacent to the bearing on the housing side and the discharge port is formed adjacent to the cooling fan so that the cooling fan sucks the ambient air into the suction port and discharges the discharged air to the discharge port.
KR1020160007855A 2016-01-22 2016-01-22 Scroll compressor KR20170088021A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
KR1020160007855A KR20170088021A (en) 2016-01-22 2016-01-22 Scroll compressor
PCT/KR2016/001390 WO2017126732A1 (en) 2016-01-22 2016-02-11 Scroll compressor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020160007855A KR20170088021A (en) 2016-01-22 2016-01-22 Scroll compressor

Related Child Applications (1)

Application Number Title Priority Date Filing Date
KR1020180017623A Division KR101871385B1 (en) 2018-02-13 2018-02-13 Scroll compressor

Publications (1)

Publication Number Publication Date
KR20170088021A true KR20170088021A (en) 2017-08-01

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Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020160007855A KR20170088021A (en) 2016-01-22 2016-01-22 Scroll compressor

Country Status (2)

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KR (1) KR20170088021A (en)
WO (1) WO2017126732A1 (en)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1026090A (en) * 1996-07-08 1998-01-27 Asuka Japan:Kk Ventilation cooling type scroll fluid machine
JP4105850B2 (en) * 2001-02-05 2008-06-25 アネスト岩田株式会社 Scroll fluid machinery
JP2003202030A (en) * 2001-12-28 2003-07-18 Anest Iwata Corp Scroll fluid machinery
JP4629546B2 (en) * 2005-09-30 2011-02-09 アネスト岩田株式会社 Scroll fluid machinery
KR101241366B1 (en) * 2011-06-27 2013-03-11 경원기계공업(주) Cooling Apparatus and Cooling Control Method of Scroll Air Compressor

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Publication number Publication date
WO2017126732A1 (en) 2017-07-27

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