JPS6158995A - Rotary compressor - Google Patents

Abstract

PURPOSE:To enhance the wear-resistance and reliability of a rotary compressor, by providing such an arrangement that blades are made of ceramic bulk materials while a crankshaft is made of metal with a ceramic layer being formed on the rotary slidable part surfaces of this shaft, and a covering layer is formed on the roller side surface with the use of phosphate, etc. CONSTITUTION:Each blade 10 is made of ceramic bulk materials while a crankshaft 1 including a rotor insertion section 12 are made of magnetic materials such as, for example, cast iron. Further, ceramic layers D are formed on rotary slidable section surfaces 13, 14 on the crankshaft 1 with respect to main and sub bearings 6, 7 and on a rotary slidably surface 15 on a crank section 8 with respect to a roller 9 so that the layers D having a predetermined thickness surround their associated sections. With this arrangement, the wear-resistance of the rotary compressor may be remarkably satisfied, and it is possible to prevent the efficiently of a motor from lowering, thereby it is possible to greatly enhance the reliability of the rotary compressor.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field 1 of the Invention The present invention relates to a rotating 7, residual compressor, in which H is a compression element 4.
7. This invention relates to a rotary compression line that improves the component parts and their moving parts (1411+-) to have excellent wear resistance, and maintains the changing efficiency of the electric element.

[Technical Background of the Invention and Problems Therewith] Generally, a rotary compression speed is provided with a "heart-moving element" and a compression element that drives the rotation of this electric element via a crankshaft in a case.

The electric element consists of a rotor inserted into the crankshaft and a stator that drives the rotor.

The compression element is mainly composed of four parts: a cylinder, and a main and sub bearings that close the upper and lower surfaces of the cylinder and pivotally support the crankshaft. A roller is provided inside the cylinder, which engages with the crank portion of the crankshaft and rotates with its inner peripheral portion as the pan center. A blade is provided on the cylinder side, and this blade is configured to come into contact with the rotor to partition the refrigerant into a suction side and a discharge side within the cylinder.

Further, lubricating oil is stored in the inner bottom of the case, and this lubricating oil is supplied to each sliding portion of the compression element by a pump neck formed on the crankshaft.

Conventionally, in the rotary compression compensation system developed in this way, all of the components of the compression stage were made of metal or ceramic.

On the contrary, when the compressor is started in a sleep state or is operated in a defrosting mode, refrigerant may dissolve into the lubricating oil in large amounts. [!
11, when the compressor cools down, the gas refrigerant inside it is cooled and liquefied, and if a liquid backlash occurs due to defrosting operation, the liquefied refrigerant mixes with lubricating oil and dissolves.
The absolute amount of oil supplied to the compression element is likely to be insufficient.

゛Also, during the refrigerant liquid back phenomenon or startup in a state where lubricating oil and liquid refrigerant are mixed, the liquid refrigerant in the lubricating oil may foam ()]
7Ij causing A-ming and supplying the compression element to each store moving surface.
1 becomes intermittent or tends to run out of oil.

Therefore, as described above, when the compression element is made of metal, there is a problem in that each of its calendar movement surfaces is subject to galling lock due to the lack of oil supply or the like.

Further, when the compression element is made of ceramic, the crankshaft inserted into the rotor is also made of ceramic. However, since the crankshaft made of ceramic is a non-magnetic P1 body, the magnetic flux density of the electric element decreases, resulting in a decrease in morph efficiency. Therefore, there was a problem in that an excessive load had to be applied to the electric element.

[Object of the Invention] The present invention was devised to effectively solve the problem f- in conventional rotary compressors.

An object of the present invention is to provide a rotary compression unit that can improve the wear resistance of each component of the compression unit as much as possible, and also achieve high efficiency of the moving elements.

[I of invention! ! [Summary] In order to achieve the above object, the present invention is designed to sandwich both sides of a cylinder, and a main and nub bearing that pivotally supports a crankshaft, and a main and nub bearing that rotates within the cylinder centering on the cylinder due to rotation of the crankshaft. A rotary compressor equipped with a roller and a blade that comes into contact with the roller and partitions the refrigerant into a discharge side and a suction side. Step by step, ceramics 1 and 1 were formed on the surface of the rotating active part of the crankshaft, and phosphoric acid J7. It is constructed by forming a wave n'A layer with H, etc., and improves the wear resistance of each component of the compression element (111), as well as achieving high efficiency of the electric element.

[Embodiments of the invention] An embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

For example, the rotary compression type shown in FIG. 1 (1-J configuration is adopted).

As shown in the figure, an electric element Δ and a compression element B, which are connected by a crankshaft 1, are provided in a case 2.

The electric element Δ is mainly composed of a rotor 3 inserted into the −L portion of the crankshaft 1 and a stator 4 surrounding the rotor 3 with a predetermined gap therebetween.

The compression element 34 is mainly composed of an annular cylinder 5 and a main and nub bearing 6.7 that close the upper and lower surfaces of the cylinder 5 and pivotally support the crankshaft 1.

Specifically, a roller 9 is engaged with the crank portion 8 of the crankshaft 1.The roller 9 rotates eccentrically within the cylinder 5 due to the rotation of the crankshaft 1. Sea urchin (14 sea urchins)

Further, a blade 10 is provided so as to pass through the cylinder 5. The blade 10 has one end urged toward the fixed side and supported, and the other end abuts against the outer peripheral portion of the roller 9.

The blade 10 formed in this manner is configured to partition the refrigerant within the cylinder 5 into a discharge side and a suction side.

Lubricating oil C is stored in the inner bottom of the case 2.

The crankshaft 1 has a pump device 11 immersed in lubricating oil C at its lower part. This pump device 11 is configured to generate a centering force in the lubricating oil C by the rotation of the crank II+lh1, and supply this to each sliding portion of the LL compression element B with a centrifugal pump.

Particularly, in the present invention, the L-1 blade 10 is formed of a remix bulk grinder, the crankshaft 1 is formed of metal, and a ceramic layer is formed on the surface of the rotationally active part of the crankshaft 1. , a coating layer E of phosphoric acid, etc. is formed on the surface of the roller 9 side of the sub-bearing rig.

Specifically, the crankshaft 1 is constructed as shown in Fig. &lt2.

The crank@1 including the rotor insertion portion 12 is made of magnetic metal (
For example, it is made of cast iron, etc.). Also, ceramics Im
D is the main and sub bearing of crankshaft 1 6.7
Each rotation 1 with the roller 9 is formed by coating the moving part surface 13° 14 and the rotating part surface 15 of the crank part 8 with the roller 9 to a predetermined thickness. Ru. Ceramic l11UD is made by ceramic coating such as plasma jet or chemical thermal deposition.

Further, as shown in FIG. 3, a coating layer opening is formed on the surface X of the sub-bearing 7 on the roller 9 side by coating the entire area in a predetermined J7. This coating layer E is formed by, for example, performing a phosphate coating treatment.

Further, each component of the compression element B except the blade 10 is formed of ordinary metal. For example, crank 1FIl
As described above, l1 is made of cast iron, the main and sub bearings 6.7 are made of bowie l-metal, and the cylinder 5 is made of cast iron.

Incidentally, both the blade 10 and the roller 9 may be formed of a ceramic bulk material.

In this case, the crankshaft 1 is formed of metal as described above, and the surfaces of the rotating parts of the main and sub bearings 6 and 7 of the crankshaft 1 and the surfaces of the rotationally active parts of the crank part 8 and the rollers 9 are used. Then, a ceramic coated ceramic T'tD is formed. Further, each component of the compression element B except the blade 10 and the roller 9 is formed of metal.Next, the operation of the present invention will be explained.

By forming the blade 10 from a ceramic bulk material, each of the compression elements B that come into contact with the blade 10 (1 indicates the sliding part with a component) can be used for a long time! i! Extremely wear-resistant (good θf).

That is, the sliding parts on both sides of the blade 10, the storage area of the cylinder 5 that stores the blade 10, and the blade 1
Since the blade 10 is made of ceramic, the IJjtq force is reduced on the sliding parts between the upper and lower surfaces of the blade 10, the sliding parts of the main and sub bearings 6 and 7, and the outer peripheral surface of the roller 9, such as the tip of the blade 10. This will result in the formation of a smooth movement.

In addition, each sliding part of the main and sub-bearings 6.7 and the inner circumferential surface of the blade 10 has a ceramic layer l] formed on the rotating active part surface 13° 14.15 of the crankshaft 1 and its crank part 8. Therefore, there is no metal contact between the crankshaft 1 and the crankshaft 1.

Therefore, the PIr abrasion resistance of the main and sleeve bearings 6, 7 and the inner peripheral portion of the roller 9 can be increased as much as possible.

Furthermore, the lower end surface of the roller 9 comes into contact with the sub-bearing 7 due to its own weight, but () a coating layer E is formed on the surface X of the sub-bearing 7 on the roller 9 side by phosphate coating treatment. Therefore, it comes into contact with the sub-bearing 7 via this IFliE. Therefore,
There is no metal contact between the roller 9 and the sub-bearing 7,
Extremely good wear resistance can be achieved.

Further, since the crankshaft 1 including the rotor insertion portion 12 is formed of a magnetic metal, the decrease in the magnetic flux density of the motor as in the conventional example does not have any effect on the motor efficiency.

In addition, if excessive contact pressure is generated on the sliding surfaces of the rollers 9, etc., the main bearings and the bearings 6 and 7, and extremely good wear resistance is required on these sliding surfaces, the blade Both the roller 10 and the roller 9 may be made of ceramic bulk material.

In this case, as described in the above example, the ceramic layer D is formed by ceramic coating on the surfaces 13, 14, and 15 of each rotationally active part of the crankshaft 1, and the other parts (I111 are formed of metal). .

This J, sea urchin (by forming b1, the main and sub bearings 6.7) the roller 9 side table 11ni X are both metal, and since the roller 9 is made of ceramics, This improves the wear resistance of the upper and lower sliding surfaces.

To this end, the present invention provides that at least one of the sliding parts of the pressure flii)2 and f3 is subjected to a ceramic treatment or a phosphate coating treatment. Therefore, galling does not occur in one moving part as in the past, and even under various F Monkey.

Also, )-E 1! i 92 Cu B's (1!i) Since the use of laminated parts is minimized, the cost is reduced.
Can be configured.

Furthermore, since the crankshaft 1 including the 1-tar insertion part 1 is formed of metal, a decrease in efficiency is prevented, resulting in a highly reliable compressor.

[Effect 1 of Brightness] To sum up, the present invention exhibits the following excellent effects.

(1) By applying ceramic or phosphate coating to at least one component that makes up each sliding part of the compression element, the wear resistance of each sliding part can be significantly improved. can.

(2) Since the use of ceramic components in the compression element (1) is minimized, low costs can be achieved.

(3) High efficiency of the motor can be achieved by forming the crankshaft including the rotor insertion part from metal.

4. Simplification of the drawings ζlj, /,,i: Explanation FIG. 1 is a sectional view showing an embodiment of the rotary compressor according to the present invention, FIG. 2 is an enlarged sectional view showing the crank il+ of FIG. 1, FIG. 3 is an enlarged sectional view showing the main and sub bearings of FIG. 1.

In the figure, 1 is a crankshaft, 5 is a cylinder, 6 is a main bearing, 7 is a sub-bearing, 9 (, 1 roller, 10 is a blade, D is a ceramic layer, and E is a coating layer.

Claims (1)

[Claims] The main and sub bearings are provided to sandwich both sides of the cylinder and support the crankshaft, and the rollers rotate eccentrically inside the cylinder due to the rotation of the crankshaft, and the rollers come into contact with the rollers to draw the refrigerant into the discharge side. In a rotary compressor equipped with a blade that partitions into two sides, the blade is formed of a ceramic bulk material, the crankshaft is formed of metal, and a ceramic layer is formed on the surface of the rotationally active part of the crankshaft, A rotary compressor characterized in that a coating layer of phosphate or the like is formed on the roller side surface of the sub-bearing.