JPS59201994A - Stationary vane type compressor - Google Patents

Abstract

PURPOSE:To suppress leakage of compressed gas, and inverted rotation of roller while to prevent friction, burning and power loss at each sliding section by forming a coating layer entirely over the outercircumference of roller. CONSTITUTION:Coating layer is formed on the outercircumferential face facing against the bore 3 of roller 7, side face facing with the front and rear heads and the innercircumferential face facing with the eccentric shaft secton 9a, to reduce the gap at the sliding section against the outercircumferential faces of roller 7 and eccentric shaft section 9a. Consequently leakage of gas is suppressed to suppress inverted rotation resulting in reduction of friction at each sliding section.

Description

[Detailed description of the invention]

The present invention relates to stationary vane compressors. More specifically, it includes a cylinder, a front head, and a rear head, and an eccentric shaft portion of a drive shaft and a roller that fits into the shaft portion are housed in the bore of the cylinder, and the cylinder is in sliding contact with the outer circumferential surface of the roller. The present invention relates to a stationary vane type compressor in which a vane is installed in the interior so that the vane can move freely in and out, and the roller eccentrically rotates within the cylinder to compress gas. This type of pressure ki machine is a "closed type refrigeration machine" (Japan Refrigeration U
B-kai, published on July 6, 1982) Pi4j, and the one shown in Figure 6 is known. As shown in Fig. 6, the bore (55) of each cylinder (52) is
) The roller [51] is mounted in a slot so that the outer peripheral surface of the roller (51) is in sliding contact with the inner peripheral surface of the cylinder cylinder 52) marked NU, while the roller [51] is mounted on the cylinder 52) marked NU.
The vane (56) is provided with a vane (56) that is in sliding contact with the roller (51) at all times, and the vane (55) is connected to the suction side chamber (5a) and the compression side chamber (5a).
5b), and the low-pressure gas is sucked into the suction side chamber (55a) by the eccentric rotation of the rotor (51), and the gas is compressed to high pressure in the compression side chamber (55b). (5) is an eccentric nqb that fits into the roller (51).
; a drive shaft with X+s (54);

[57] is the inlet,
(58) is "discharge 1". However, the niJ J.7.:/- had the following problems. ::)+S 1 +K, 1iil roller (51) Outer circumferential surface and inside of the cylinder (52) H! B contact with blood: 'A
s (1?) is each member of NiJ (51), t52)
If the contact point 1(';, 41) comes into contact, a rotational defect such as condensation A'1 will occur. This was to prevent contact.For this reason, the bore (55) of the cylinder
The refrigerant at the sillage pressure on the compression side 'jt (55b) of the slide 1
The air leaks into the suction side chamber (55a) through the entire +iiJ gap of the concubine rats (CP), and as a result, the cylinder (52) (7)
A problem has arisen in which the displacement bt of the voltage gas decreases and the coefficient of performance of the compressor decreases. In addition, reducing the gap in niJ means that the drive shaft (55)
There is a limit due to the bearing clearance, the machining tolerance and assembly tolerance of parts of the compression part such as the cylinder (52) and the roller (51). At each sliding contact part with the front and rear heads (both not shown),
The roller (51) generates a large frictional force, resulting in power loss, and also causes problems of seizure due to poor lubrication and intrusion of dust.Furthermore, the sixth roller (51) is...
The sliding contact between the inner peripheral surface of 51) and the +iiJ eccentric shaft) and the outer periphery t[ti of 54: fl(, tI7J low roller] is the above-mentioned (1ζbrπS[54
] Not only is the eccentricity directly transmitted from the same 1st column (revolutionary motion around the drive shaft (53)), but also the unnecessary +jiJ shaft part (54 ) vs.
[Following rotation (rotation motion 5 is also performed. A large frictional force was generated due to the contact, and the following rotation occurred at a large rotational speed.As a result, the sliding contact speed of the roller (51) with the mJ recorder pad increased unnecessarily, and the sliding contact portion hi in
+=s force, and therefore the power loss further increased, which further aggravated the problems of seizure and a decrease in the coefficient of performance. Similarly, the roller (51) marked n and the vane (56)
Since the speed of sliding contact with the tip 1ris also increases, there is a problem in that the tip of the vane (56) is significantly worn. Therefore, the inventors of the present invention conducted research in order to solve the above problem and came to the conclusion noted as -F. a) The outer peripheral surface of the IJU roller (51) and the cylinder (5
2) By forming a coating layer with a low coefficient of friction and high wear resistance, the gap between the sliding contact and the inner circumferential surface (P) can be significantly reduced ( Therefore, from the compression side chamber (55,b) to the suction side'M (55,
a) Refrigerant leakage to 1 can be significantly reduced b) Also % TJi
By forming the above-mentioned ffca layer component on each sliding contact portion between the tenth surface and each head (Low roller J), the frictional force at each sliding contact of F3iJ can be reduced and burnout can be prevented. C) Furthermore, the inner periphery of the roller (51) and the eccentric shaft portion (
54) The follow-up rotation of the roller (51) can be suppressed by forming a +nl coating layer between the roller (51) and the outer peripheral surface. Therefore, an object of the present invention is to suppress the leakage of compressed gas from the compression side chamber to the suction side chamber and to suppress the following of the four rollers by forming a layer covering the entire outer circumference of the roller. Suppresses rotation, and also allows for smoothness at the base of each sliding contact mentioned above.
The purpose is to prevent seizure and power loss, and to improve the coefficient of performance of the compressor. Is there more purpose than that? In order to achieve this, the present invention forms... an outer circumferential surface of the J roller that is arched opposite to the bore, a side surface that faces the front and rear heads, and an inner circumferential surface that faces the eccentric shaft. By forming a layer, the gap at the sliding contact portion between the outer circumferential surface of the roller and the outer circumferential surface of each shaft of the MU-marked shaft portion can be made significantly smaller than in the past. Saw adjustment? This was done so that the amount of friction caused by each contact with the slide can be reduced. Hereinafter, one embodiment of the present invention will be described based on the drawings. The one shown in Fig. 1 is a stationary vane type 11:
ad A compression element (2) that compresses the refrigerant is installed below the hermetic casing (1), and the compression element [2] is powered above the casing (1). A supply motor (M) is installed inside. The compression element (2) is located above and below the cylinder (4) which has a bore inside. +( is provided with a front head (ri) and catcher head (6), while said cylinder (
A roller (7) is installed in the bore (6) of the cylinder (4). Also, the cylinder (4) has a sliding groove (4"shown)'
? i:IllzoIM, and inside the sliding groove (this vane (10
) is set in uJ ■7hi.

[T] This vane (1C) is always urged toward the contact with the roller (7) by a spring (not shown), and the bore (3) is connected to the suction port (11) by the single vane [10]. ) and a compression side chamber (not shown) having a discharge port (not shown). Also, the motor CM) & l, and its stator (8) have a drive shaft. (9) is press-fitted and fixed.The drive shaft (9) is connected to each head (5), (
6) and the cylinder (4), and insert each head (
In addition to supporting the bearings (5a) and (6a) of 5) and (6), the eccentric shaft of the rFJ drive shaft (9)? A.S.
(9&) The roller (7) is inserted into the bore (6). Further, (12) is a suction pipe that communicates with the suction port (11) and introduces low-pressure refrigerant into the compressor, and (1) is a suction pipe for discharging high-pressure refrigerant gas from inside the casing (1) to the outside of the machine. This is the discharge pipe. In this way, 011 due to the drive of r+iJ motor (M)
From the eccentric rotation of the gripping roller (7), the low pressure refrigerant is
Suction pipe (12), suction port (11)? i: At the same time as suction into the suction side chamber (3a) of the mJ bore (6),
The refrigerant in the compression side chamber in the bore (6) is scraped to a predetermined pressure and discharged from the discharge port to the outside of the cylinder (4), and further to the outside of the machine via the muffler (', 4) and the discharge pipe (1 filter). It is designed to be discharged. Also, (19) is an oil reservoir provided at the bottom of the casing (1).

[18] is an oil supply passage that supplies lubricating oil to each sliding portion of the drive shaft (9), and is also connected to the sliding portion of the roller (7) described in 11j1 and the eccentric shaft portion (9a).
It is possible to supply m oil. In the compressor having the above configuration, the roller (7)
A coating layer (
15a), (15b), (15c). (15d) is formed. That is, the outer circumferential surface of the roller (7) marked with nil is opposite to the bore (3) marked with ■, and 1i.
Covering layers (I 5a), (15b), (15c) are provided on the inner circumferential surfaces of the front and rear heads (5), (6) G, which are opposite to each other, and which are opposite to the eccentric shaft portion (9a).
) and (15(1)) respectively. However, fluorine resin is one of the preferable ones.
To explain one example of use, first, tetrafluoroethylene polymers and tetrafluoroethylene copolymers, such as tetrafluoroethylene-hexafluoropropylene copolymers (hereinafter referred to as FKP), tetrafluoroethylene-perfluoroalkyl vinyl ether copolymers, etc. Polymer (
Polyphenylene sulfide (PPS), polyethersulfon (pxs) is added to an organosol in which at least one selected from ethylene-tetrafluoroethylene copolymerization (hereinafter referred to as PFA), ethylene-tetrafluoroethylene copolymerization (/$(ETFE)) is dispersed in an organic medium. , polyamideimide (PA), polyimide (P), and other resins selected from the group consisting of at least one type of resin.
Create /J. Then, after degreasing and sandblasting, the composition is applied to the entire outer surface of the roller (7) by air spraying,
After infrared drying, firing at 280°C to 380°C (
After about 30 minutes, the VC layer (15a)

[15d] is formed. Further, the thickness of the armor-breaking layers (15a) to (15d) is 1jjl.
The pressure testing elements (such as the roller (7) and cylinder (4))
2) Determined by the processing tolerance and assembly tolerance of the component parts＞JZ
F is approximately 20 to 70μ, preferably 40±5μ. In addition, to describe in detail an example of the fl'J paint, 400
1Xl of PT in methyl isobutyl ketone (organic medium)
FE aqueous dispersion (combined content: 60 wt 1t% [Daikin Industries 1 Weak Polyflon Dispersion D-;r)
) 301lls and F' F, P aqueous dispersion containing Arashi 50 tons I+L% (Daikin Industries, Ltd. Neoflon Dispersion ND-J)) 70 tons is dispersed,
Furthermore, water 'f: is removed and P Tij' E / ]
PTFE-FEP with T IGP = 5/7 composition
A pale yellow translucent orno sol containing 7% of 25.0 tons was obtained. This mixed organosol 2 o O+; ts and P]uS1
65 parts of QQ Part C1, manufactured by O-King) and 100 f'flS of dimethylformamide, and as a pigment Carbon Neo Spectra Mark ■ (manufactured by Columbia Carbon) 6
Part and titanium oxide FR-22 (Titan Kogyo) 1 cycle 9
is kneaded and filtered to form "C." The operation of this embodiment configured with the above j4J will be explained. First, the compression action of the compressor will be briefly explained again. Accompanying MiJ rotor (7)
The low-pressure refrigerant is supplied to the suction pipe (12) through the eccentric rotation of the
The suction side chamber (
At the same time, the refrigerant in the compression side chamber in the bore (6) is compressed to the required pressure and discharged from the discharge port to the outside of the cylinder (4).
If it is discharged to the outside via (1 ro) (bru.
) are formed on the entire outer surface of the Q layer (15a) to (15), and firstly, the iJ-+I bore [6] is divided into an intended suction side chamber (3a) and a compression side chamber. Said roller (7)
The above-mentioned cover a is placed on the sliding contact portion between the outer circumferential surface and the inner circumference of the cylinder (4).
Since J￥j (15a) is interposed, rotation failure due to metal contact does not occur at the mI sliding contact part, so the gap for 1 official sliding contact tSIS can be significantly reduced compared to the conventional one. . As a result, the refrigerant leaking from the compression side chamber to the first suction side chamber (6a) through the gap can be reduced to a small amount, thereby improving the coefficient of the compressor. O Also, secondly, the 1iiJ roller (7) is coated with a low friction coefficient tiiJ coating layer on both upper and lower sides 5bt, (15c)
form the first one, n'rJ low flora and iU
The frictional force caused by sliding contact with the recording pads (5) and [6] is also reduced. In addition, dust such as abrasion powder of the rJiJ vane (10) remains in the 1111 cylinder (4), but that dust is attached to the logo press head, (5), (6), and the 1IiJ roller (7). Even if the dust enters each sliding contact part, the dust is removed from the coating layer (15b) on both upper and lower sides of the roller (7).
), (15c), so that the scraps do not get caught in the sliding contact portion, causing an abnormally large frictional force or causing burn-in. To be more specific, in the conventional type without a coating layer, dust that has entered the sliding contact area between each press card (5), C6) and the roller (7) is caused by...■. It rolls around, and in the process, the trash gathers together and becomes a large diameter.
There was a problem that the sliding contact part of the fTU recorder could get into the contact part, increase the friction force2, or cause burn-in.However, in this embodiment, any dirt that has entered the sliding contact part can be immediately removed by covering the recorder. It is embedded in the layers (15b) and (15c) 60), and there is no possibility that it will be transmitted, become large in diameter, and bite into the sliding contact portion, increasing the frictional force. Furthermore, sixthly, since a coating layer (15d) with a low coefficient of friction is formed on the inner periphery of the roller (7),
The frictional force between the +ttJ eccentric shaft eccentric shaft part] is also reduced, and as a result, the slave rotation of the +jiJ low roller relative to the eccentric shaft part (9a) can also be suppressed, and from this point... The frictional force between the FJ Djl roller (7) and each bed (5), (6) can be reduced.As a result, power loss can also be reduced,
In turn, the coefficient of performance can be further improved. Also, the roller (7)'s f The sliding contact speed of the tip of the vane (10) can be controlled by +ar by the force S that suppresses the il transmission, and therefore the sliding contact speed at the tip of the vane (10) can be controlled by +ar. Encouragement layer (
15a), (15b), (15c)k cylinder (4)l
/(And each head (5), (6) may be in contact with each other. In this case, the rotation of the roller (7) 'k rc + H R' + J written covered layer (15a), ( 15b). (150) is scraped off and the roller (7)
The minimum gap that allows this method is naturally formed. According to the invention, the force n of the roller (10) is
The outer peripheral surface facing the bore (6) marked iJ, the side surface facing the front and rear heads (5), (6), and the inner peripheral surface facing the eccentric shaft portion (9a) are each broken (15a). (15d,), compressed gas leaks from the compression side chamber to the suction side chamber (filter a) through a gap of 1°'trI between the roller [7] and the cylinder (4). It is possible to significantly reduce the amount of
While the power loss due to the upper and lower side surfaces of the roller J (7) can be suppressed, the coefficient of performance of the pressure silk machine can also be improved. At the same time, the sliding contact portion between the roller (7) and each head (5), (6), the vane (1o)
This prevents wear and seizure of the tip. Moreover, since the coating layers (15a) to (15d) are formed on both members, there is no 01, but +1'J roller (7).
One part I was rubbed to form only I, so IJ! The number of man-hours required for forming the J covering layers 5a) to (15d) can also be reduced.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional view showing an embodiment of the present invention, and Fig. 2 is a g
FIG. 5 is an enlarged longitudinal cross-sectional view showing the main part of the conventional example. (6)...Bore (4)...Silling (5)...Front head (6)...Rear head (7)...Roller (9)...Drive shaft C9a) -up"+ Heart dQf+ part (10)... Vane (15a) ~ (15d) +・+ Coating layer agent Patent attorney Tsu 1) Naohisa

Claims (1)

[Claims] (1) Cylinder (4) and front and rear head (
5) and (6), the bore (6) of the cylinder (4)
) The eccentric shaft portion (9a) of the drive shaft (9) and the shaft portion [9a
, ) and 81
In the pressure iVi machine that holds the vane (10) in sliding contact with the outer circumferential surface of the roller (7), the cylinder (4) is
An outer peripheral surface of the roller (10) facing the bore (6), a side surface facing the front and rear heads (5) and (6), and an inner peripheral surface facing the eccentricity 1h11 (9a)l. A stationary vane type compressor, characterized in that a number coating layer (i5a) to (15d) is formed.