JPH03206383A - Scroll compressor - Google Patents

Abstract

PURPOSE:To prevent an Oldham's coupling from being galled, seized, abnormally worn and so forth, by applying SiC dispersion type electric Ni-plating onto either one of a key groove formed on a swivel scroll member or a key-like protrusion formed on the Oldham's coupling. CONSTITUTION:In a scroll compressor in which a scroll compressing section disposed in a closed container 1 is driven by a crank shaft 7 that is rotated by a motor section disposed below the scroll compressing section, a crank 7a projected from the front end of the crank shaft 7 is engaged with a swivel rotary shaft receiver 4c of a swivel scroll member 4. Further, there is provided on Oldham's coupling 8 as an auto-rotation preventing mechanism for the swivel scroll member 4 which has four key-like protrusions 8a, 8b that are engaged in a key groove formed on a base plate 4a of the swivel scroll member 4 and a key groove formed on a base 6a of a frame 6. In this arrangement, SiC dispersion type electric Ni-plating is applied to the key-like protrusions 8a, 8b, thereby it is possible to enhance the durability of the Oldham's coupling 8.

Description

[Detailed Description of the Invention] [Fields of application on filter cake] 41: The invention relates to a salt treatment method 3 for 1G abrasion resistant A two-sided salt treatment for separating scroll presses into Oldau joints.

[Conventional technology]

Jubei's device has a s4-layer nickel a on the surface of the Oldham ring, as described in Publications No. 1988-248886.
8 plating was applied, and the orbiting scroll and Oldham ring were made of 41 aluminum.

This is a close call, if the inverter is groaning with variable speed scrolling.
With the advent of Gumin, energy saving and central efficiency are being achieved by reducing the oN/oyyg degree and continuously controlling the discharge amount according to the load. In contrast, it is necessary to reduce the amount of gutter for the orbiting scroll and Oldham ring, which are simple parts, but the above technique is difficult. With soul by fI1 movement of "Gane",
On the other hand, it was intended to prevent galling, etc., by using a highly porous-resistant structure.

[3?3 Issues that Ming is trying to improve] The above-mentioned technology has high rigidity, elbow heat injection, and durability compared to high speed and high temperature sliding trends. However, there were problems such as galling, localized peeling, and ``togane'' parts of the aluminum, and sudden failures caused by wear and seizure. .

The present invention is designed to prevent sliding of the scroll compression valve due to high-speed operation, for example, due to the operating frequency of l 5 0 } 1 z , scraping of Oldham's hand, and galling σ) to occur. The purpose is to provide L.

[Method for deciding assignments]

In order to achieve the above object, the present invention applies AmW treatment to at least one of the "tomogane" portions of aluminum by applying a nickel (Ni) plating layer to a silicon carbide (SiC) particle. [Function] Dispersion of SiC particles to either key-like protrusion of the Oldham ring to the key #I #mafcV of the orbiting scroll 4 4
By applying A IN i plating, it is possible to avoid the "togane" of aluminum. As a result, the combination of S number C particle distribution 4 ton air Ni skin and aluminum is achieved! Il
d, and due to the synergistic infancy of the subthermal rigidity of the SiC particles, the high-temperature gorge, and the crystallinity of the screw AN number plating reaction, the relatively soft aluminum alloy and the burn-in caused by contamination are eliminated. Since it is also possible to avoid abrasion caused by the SiC particle permissible electric Ni coating A on the polished surface, the durability of the Oldham heel is greatly improved.

[Example] Hereinafter, an example of the present invention will be explained with reference to the younger brother t figure VC.As shown in figure 1, one scroll If machine has a compressor part above the tank closing capacity of 1 yen, and a compressor part on the f side. The engine part (not shown) is installed on the shoulder and through the crankshaft 7. I-shaped lapug 5b
χUpright 7t fixed scroll member 5, plywood 4a & kozu-waki-shaped Tsubugu 4b are upright #! Rotary scroll member 4
are interlocked with each other, and the fixed scroll member 5 is provided with an inlet 5d at its outer periphery and a discharge hole 56'4 at its center.

The crank 7 is supported by a support 6c in the center of the frame, and a crank 7a protruding from the tip of the crank 7 is inserted into the orbiting support 4cV of the orbiting scroll member 4 and fitted therein.

Oldham's hand 8, which serves as a mechanism to prevent rotation, prevents damage to the rotating scroll member from rotating compared to the fixed scroll member 5v. It is a joint that encourages rotation, and is secured between the plywood 4a of the orbiting scroll member 4 and the frame 60 m6al/).

Therefore, when the Kutsunku shaft 7 rotates due to the #L excitation of Shimoman, due to the rotation of the Kuunku 7a+/)tJIi, the orbiting square member 4 does not rotate, but rotates with respect to the fixed scroll member 5 by τ6. , Inlet 5d and 9I! jL
The refrigerant gas that has entered is compressed, and if gas is discharged from the discharge hole 5e.

Younger brother Figures 2 to 4 show details of the anti-rotation mechanism members. Keyway 6bI with old seat 68K of frame 6! : The keys provided on the back of the orbiting scroll member 40 base plate 4a, the key-shaped protrusions 8b at 804 locations of the Oldham joint 80, and the key-like protrusions 8b I 8a, which are installed on the back surface of the base plate 4a, meet the floor and move back and forth.
This is intended to prevent the rotating scroll member 4 from rotating.

Therefore, the key-shaped protrusion 48a+8' is used for gas fi▲ and centrifugal fi▲, as shown in the younger figure 5. (Force F in the diagram)
Now, when the rotation of the motor is increased by the inverter, for example to L50}fz, the key 4 of the orbiting scroll is pressed.
The key-shaped protrusion 8ay that was raised to 4G is convenient for the rotation increase of the 2nd link shaft, and it is possible to make the reciprocating speed IfJk-Dantoro v
C becomes. Therefore, as for loading the cargo to the key-shaped pipe 8" + 8b, a centrifugal fi
A large stove is set 4.

On the other hand, the oil in the hand of the Oldham 611 is caused by the oil supplied by the differential pressure from the A-cap holder colliding with the rotating balance weight, and depending on the amount of splashing at that time.
(When VC is operated at high speed, the Suriichi-A heat of the relevant part will not be affected.)
V, also known as 1f, will result in four problems: 9, seizing, and t4 wear.

In this way, the sliding boundary of the key-shaped protrusion deteriorates sharply due to the increase in surface pressure due to the application of the centrifugal load ▲ and the increase in the rate of displacement.

+: In the case of an inverter and 6 driven scroll pressure shoulders that the invention deals with, 54 kaku 2 thread trowel surface pressure x circumference m (P
VI111E)ノjfI1'cllL! :Ltev;il
00 accuracy f/m"・m/observance degree, but in the six-sided processing described as a known example, V, the occurrence of galling,
Skin ai [(Q#) was observed to disappear due to early operation.Especially in the condition of starting operation (oil temperature: approximately 120'O) The above-mentioned problem occurred at the 2nd and 4th turn of g50 hours.

In this particular situation, the shape g of the key-shaped protrusion of the Orgum ring of the invention on the sliding surface is the shape of the knob coating, which is the shape of the key groove of the orbiting scroll V. , Normally 25μ1114 even under the load operation of the above p-■4 Otaka
It is only 4k loss of 2~aμ trout for the thickness of 1<,
Also, there is no galling and the sliding part is good! It is something that shares fertility.

Nap, 8sC min. no 44N as the opposing surface treatment
There is plating skin maple, but in high-speed, high-temperature fWI1 such as at Oldham's joint, the amorphous film undergoes a temperature rise due to heat generation and partially changes to crystalline. For this reason, it is comparable to Crystal Steel's SiC Ni plating, which has a durability of 4
It seems that the wear resistance was low F.

In addition, if heat treatment is not appropriate for non-tuned 4Ni plating,
Skin IJ! There are cases where cracks are observed in the 417'3 portion, but there are also cases where OT scratches are observed, which is similar to the above-mentioned m* wear resistance and low Fll'c oddness.

7t ta L,, Si C f'p pattern N i Z y
It is necessary to polish the -A side regardless of MuIs.

The younger brother t1- shows the relationship between the surface depth of a plated box and the degree of abrasion.When the second side surface is as large as 15μ, the SLC fractional particles with a microbib cursing hardness of about 2500 act as a file. The first step of polishing to achieve a roughness of 1 to 5 .mu.m can be said to be inconvenient because it will cause damage to the aluminum sliding box.

In addition, the SiC rib-shaped Ni-mepki film can be rubbed on the sliding surface of the key-shaped protrusion of the Oldham ring, or the keyway sliding surface of the orbiting scroll II! It will be enforced on either J-side V or Kosukosu, but since it is rIL Ki Mepki, tdf
It is preferable to apply the orgum ring to the key-shaped protrusion because it is easy to make the degree uniform.

[Efficacy of invention]

+: According to the invention, the Oldham joint part is galled, seizes,
It is said that 6f syndrome does not cause abnormal skin abrasion and functions normally as a mechanism to prevent rotation.

[Brief explanation of drawings]

The younger figure 1 is a vertical view showing the compression mechanism of the scroll compressor of the present invention, and the younger figure 2 is a vertical sectional view of the coal scroll member.
Figure l is a top view of 7V-5, younger brother figure 4 is an oblique view of Oldham's joint, younger brother figure 5 is a top view of Oldham's joint, and figure 6 is a key-shaped protrusion with SiC diagonal It-Ni plating applied. Figure 4 is a cross-sectional view of P arrow in Figure 4, and Figure 7 is I1lII diagram showing an example of the roughness of the knob table for 4-4 wear filtering between SiC split ridge Ni-plated product and aluminum material. It is. 1... Sealed enclosure 4... Orbiting scroll member 4a
... Orbiting scroll base plate 4b... Orbiting scroll lug 5... Fixed scroll member 6...
Frame 6a...7 frame-ei 6b...
・Frame key - $7...Crank s 8...Oldham d-f = 8a...Oldham +? -8b
...Oldham Key 8C...Table 1 treated film. Daiura person #硼十t's 11 1i, 2. ...-) ( 寥2法θcL Oroshida4key-Shagekisou2 et Ding1shiGumukimura゛binLKiryotezu-Ftsurface roughness (lA)

Claims (1)

[Claims] 1. A fixed scroll member and an orbiting scroll member having a spiral wrap standing upright on a base plate are engaged with each other and held in a frame, and the rear surface of the base plate of the orbiting scroll is engaged with a crankshaft, and the orbiting scroll member is rotated. An Oldham joint that prevents rotation of the orbiting scroll member is provided between the back of the scroll base plate and the frame pedestal, and this Oldham joint is provided with a diametrical key-shaped protrusion on one side of the annular member and a key-shaped projection on the other side of the annular member. A device having a structure in which a key-shaped protrusion is provided in a direction perpendicular to the protrusion, and the protrusion on both sides engages a key groove provided on the back surface of the base plate of the orbiting scroll member and the pedestal of the frame,
A scroll compressor characterized in that SiC-dispersed electrolytic Ni plating is formed on either a keyway of an orbiting scroll member or a key-like protrusion of an Oldham ring. 2. SiC dispersed electrolytic Ni plating film has surface roughness, 5
Scroll compressor according to claim 1, characterized in that the diameter is less than μm. 3. The scroll compressor according to claim 1, wherein the surface finish of the SiC dispersed electrolytic Ni plating film is polished.