KR20130001669A - Rotary compressor - Google Patents

Abstract

PURPOSE: A rotary compressor is provided to prevent the surface of a barrier plate from being scorched, and to reduce abrasion caused by deterioration in lubricating performance. CONSTITUTION: A rotary compressor comprises a compression apparatus part(100) and an electric motor part(200). The compression apparatus part is installed inside a sealed container(1). The compression apparatus part comprises a crank shaft(4), cylinders, a barrier plate(9), rollers, a main support plate(5), and a sub support plate(6). The crank shaft comprises a plurality of eccentric portions. The cylinders are correspondently placed to each eccentric portion. The barrier plate is placed between the cylinders, and fitted by the cylinders. The rollers are placed inside the cylinders, and each eccentric portion is respectively inserted into the rollers. The main support plate and sub support plate are inserted into the crank shaft, and positioned on both ends of the cylinder and barrier plate. The electric motor part operates the compression apparatus part.

Description

ROTARY COMPRESSOR

TECHNICAL FIELD This invention relates to the rotary compressor used for a refrigeration apparatus, an air conditioning apparatus, a hot water supply apparatus, etc., for example.

In a rotary compressor having two cylinders for use in an air conditioner, for example, two cylinders are arranged above and below the partition plate by an upper and lower cylinder, an upper and lower roller, an upper and lower bearing and a partition plate. The two cylinders each have an eccentric portion 180 degrees out of phase with the crankshaft, and the upper and lower rollers are respectively inserted in the eccentric portions to allow eccentric motion. In addition, vanes for dividing the space formed between the cylinder and the roller into the compression chamber and the suction chamber, respectively, are slid freely inserted in the two cylinders, and these vanes are pressed against the roller by a biasing means. As the roller slides in the cylinder, the rotary compressor is configured to compress the refrigerant sucked into the compression chamber.

In this way, in a rotary compressor having two cylinders, a phosphate treatment or a soft nitridation treatment is performed on the surface of the partition plate dividing the two compression chambers, so that the roller is in contact with the roller that is produced during high speed operation and high load operation. There exist some which aimed at the improvement of abrasion resistance and lubricity with respect to sliding with a board | plate (for example, refer patent document 1).

In addition, in the rotary compressor having two cylinders, a phosphate treatment is applied to the opposing surface of the partition plate and the roller, and the molybdenum disulfide coating treatment excellent in load resistance, lubricating oil retention and initial pure flame resistance is applied thereon. By carrying out, it covers the curvature and the unevenness | corrugation of the partition board surface, compensating for the processing precision, and prevented the squeeze and abrasion of the partition board surface accompanying the rotating slide of a roller (for example, patent document 2 Reference).

In addition, in a rotary compressor having two cylinders, a roller is attached and rotated to quench the crankshaft which rotates and slides the roller in the cylinder, thereby providing hardness between the surface of the main bearing and the bearing. This configuration allows the crankshaft and the main and secondary bearings to prevent seizure and abrasion even when the oil level of the oil storage portion is lowered due to refrigerant foaming during start-up or after liquid bag operation. See Patent Document 3).

Patent document 1: Unexamined-Japanese-Patent No. 2-123294 (fourth page upper right line 14-19 line) Patent Document 2: Japanese Patent Application Laid-Open No. 10-9168 (paragraph [0010], FIG. 1) Patent Document 3: Japanese Patent Application Laid-Open No. 2008-38787 (paragraph [0029] [0030], FIG. 3)

The current refrigeration unit is capable of efficient cooling or heating by operating the compressor at low speed rotation even when the temperature difference between the outside and the inside is small due to the spread of the inverter-mounted compressor that can freely control the operating speed. It is supposed to be done.

Moreover, on the side of the use, the energy saving consciousness became high, and the room setting temperature at the time of cooling or heating of a refrigerating apparatus was set to the temperature close to the temperature of outside air, and it is made to save the amount of electricity used.

Therefore, in recent years, the frequency of operating the compressor at low speed rotation increases, and the frequency of intermittent start and stop at low speed rotation tends to increase.

The rotary compressor rotates the crankshaft at the time of compressing the refrigerant, passes through the oil feed passage provided on the crankshaft from the oil reservoir, and is supplied with lubricating oil. In the lubricating oil supply path to the partition plate and the lubricating oil supply path to the bearing, there is a space having a different volume generated when assembling the compression mechanism. Among these spaces, the space created in the lubricating oil supply path to the partition plate has a larger volume than the space created in the lubricating oil supply path to the bearing. This is due to the fact that the partition plate disposed between the upper and lower cylinders needs to form a hole through which the eccentric portion of the crankshaft (larger than the main shaft portion of the crankshaft) can penetrate at the time of assembly. Therefore, when the compressor is started, the supply of lubricating oil to the partition plate is delayed more than the bearing side due to the volume difference of the space in the compression mechanism part, so that the partition plate is relatively deteriorated in lubricity against the bearing and wear is likely to occur. Inclined.

In addition, during low-speed operation in which the crankshaft continues to rotate at low speed, the amount of lubricating oil sucked from the oil reservoir through the oil supply path provided on the crankshaft decreases, and the main and auxiliary bearings, the rollers, the vanes, and the partition plate in the compression mechanism part are reduced. The supply amount of lubricating oil supplied to sliding materials, such as these falls.

In addition, in the case where the partition plate is subjected to surface treatment to improve the abrasion resistance of the partition plate, the surface treatment increases the cost because the number of steps of processing and the processing time are long.

The technical problem of the present invention is the lubricity of the partition plate due to wear accompanying deterioration in the lubricity of the partition plate during low speed operation, and the volume difference of the spaces respectively present in the lubricant supply path to the partition plate and the lubricant supply path to the bearing plate. The abrasion accompanying deterioration is reduced by the inexpensive method, and the partition plate is prevented from being scratched and seized.

The rotary compressor according to the present invention has the following configuration. That is, it has a compression mechanism part and the electric motor part which drives this in a sealed container, A compression mechanism part is arrange | positioned between the crankshaft which has a some eccentric part, the some cylinder arrange | positioned corresponding to each eccentric part of a crankshaft, and a some cylinder. A partition plate sandwiched by these cylinders, a plurality of rollers disposed so as to be positioned in these cylinders, each of which has an eccentric portion of the crankshaft inserted therein, and a spindle arranged at both ends of the crankshaft inserted to stack the cylinder and the partition plate. The space enclosed by the support and the support, the cylinder, the support, the partition plate and the roller, and the space surrounded by the cylinder, the support and the partition plate and the roller are respectively divided into two spaces of the compression chamber and the suction chamber. It is provided with a plurality of vanes, the roller is rotated inside the cylinder by the rotation of the crankshaft and the suction of fluid In the rotary compressor of repeating axis, it is subjected to a heat treatment to a partition plate, and the hardness of the partitioning plate main shaft have a hardness difference to be higher than the hardness of the receiving socket, and a minor axis.

In the rotary compressor according to the present invention, the partition plate is subjected to a heat treatment, and the hardness difference is made so that the hardness of the partition plate is higher than the hardness of the spindle support and the support bearing. To the partition plate due to abrasion accompanying deterioration of the lubricity of the partition plate during low-speed operation in which the supply of lubricant oil is delayed, and the volume difference of the spaces respectively present in the lubricant supply path to the partition plate and the lubricant supply path to the bearing plate. The wear associated with the delay of lubricating oil supply can be reduced by an inexpensive method. For this reason, a scratch and seizure of a partition plate can be prevented and reliability can be improved.

BRIEF DESCRIPTION OF THE DRAWINGS The longitudinal cross-sectional view which shows the whole structure of the rotary compressor which concerns on Embodiment 1 of this invention.
Fig. 2 is a diagram showing an assembling procedure of the compression mechanism part of the rotary compressor according to the first embodiment of the present invention.
3 is a diagram showing an assembling procedure of the compression mechanism part of the rotary compressor according to the first embodiment of the present invention.
4 is a diagram showing an assembling procedure of the compression mechanism part of the rotary compressor according to the first embodiment of the present invention.
5 is a diagram showing an assembling procedure of the compression mechanism unit of the rotary compressor according to the first embodiment of the present invention.
Fig. 6 is a diagram showing an assembling procedure of the compression mechanism part of the rotary compressor according to the first embodiment of the present invention.
7 is a diagram showing an assembling procedure of the compression mechanism part of the rotary compressor according to the first embodiment of the present invention.
FIG. 8 is a diagram showing an oil supply path of the rotary compressor according to Embodiment 1 of the present invention. FIG.
9 is an enlarged detailed view of a main part of FIG. 8;
10 is a longitudinal sectional view showing a compression mechanism portion of the rotary compressor according to the first embodiment of the present invention.
11 is an explanatory view of the operation of the compression mechanism unit of the rotary compressor according to the second embodiment of the present invention;
Fig. 12 is a diagram showing the sliding area of the sliding member in the compression mechanism of the rotary compressor according to the second embodiment of the present invention by hatching, (a) showing the sliding area of the roller, and (b) for the roller. Drawing showing the sliding area of a partition plate.
Fig. 13 is a diagram showing the sliding area of the sliding member in the compression mechanism part of the rotary compressor according to the second embodiment of the present invention by hatching, (a) showing the sliding area of the vane, and (b) for the vane. A diagram showing the sliding area of a partition plate and a main support base.
Fig. 14 is a longitudinal sectional view showing the compression mechanism portion of the rotary compressor according to the second embodiment of the present invention.
15 is a longitudinal sectional view showing a main part of a comparative example of a rotary compressor;
16 is a longitudinal sectional view showing a main part of a comparative example of a rotary compressor.

As described above, in the current refrigeration apparatus, an inverter-mounted compressor is popularized, and the operating rotation speed can be freely controlled. For this reason, in the present refrigerating device, even when the temperature difference between the inside and the outside air is small, operation is performed at low speed so that cooling and heating can be performed with high efficiency.

Moreover, in the present refrigeration apparatus, the actual use operation also has a long period of operation in a low speed rotation region where the temperature difference between the bet and the outside air is small and the required capacity of the compressor is small. Therefore, from the energy consumption efficiency (COP) which is the efficiency average of the cooling rating and heating rating which the index of the energy consumption efficiency of the refrigerating apparatus was conventionally employ | adopted, in addition to a cooling rating and a heating rating, comparative climates, such as a spring and a fall, are estimated. The Annual Energy Consumption Efficiency (APF), which also considers the efficiency of low-speed rotation of the compressor in cooling and heating (medium cooling, intermediate heating) corresponding to partial loads, such as in mild periods, is adopted. It is evaluated by energy consumption efficiency.

In addition, the use of the energy-saving consciousness is also increased on the side of the use, and the compressor is designed to operate by setting the room set temperature slightly higher when cooling and slightly lower when heating to reduce the amount of electricity used. The frequency of driving in a small range of outside air temperature and difference is increasing. For this reason, the compressor has an increased operation time at low speed rotation, increases the frequency of starting and stopping at low speed rotation, and performs intermittent start and stop.

Embodiment 1

EMBODIMENT OF THE INVENTION Hereinafter, the rotary compressor which concerns on Embodiment 1 of this invention is described in detail. In addition, it demonstrates here as an example the rotary compressor which has two cylinders used for an air conditioning apparatus. BRIEF DESCRIPTION OF THE DRAWINGS It is a longitudinal cross-sectional view which shows the whole structure of the rotary compressor which concerns on Embodiment 1 of this invention.

As for the rotary compressor which concerns on Embodiment 1 of this invention, the compression mechanism part 100 and the electric motor part 200 which drive this compression mechanism part 100 are accommodated in the sealed container 1 like FIG. (1) Lubricating oil is stored at the bottom. The electric motor part consists of the stator 2 and the rotor 3, and the crankshaft 4 is fitted in the rotor. The crankshaft 4 has the main shaft part 4a and the subshaft part 4b, and shift | deviates 180 degree phase with these main shaft part 4a and the subshaft part 4b, and the main shaft side eccentric part 4c, and And the minor axis side eccentric part 4d is formed.

The compression mechanism part 100 has the partition plate 9 and the upper cylinder 7 and the cylinder 8 arrange | positioned at the upper side and the lower side which fit the partition plate 9. The crankshaft 4 is inserted in these upper cylinders 7, the cylinders 8, and the partition plate 9 arrange | positioned between these, The main-axis side eccentric part 4c and the sub-axis side eccentric part 4d. ) Are arranged in the upper cylinder 7 and the lower cylinder 8, respectively. In addition, the intermediate shaft portion 4e between the main shaft side eccentric portion 4c and the minor shaft side eccentric portion 4d in the crank shaft 4 is arranged in the partition plate 9. Moreover, the compression mechanism part 100 has the upper roller 10 and the lower roller 11 penetrated in the main shaft side eccentric part 4c and the sub shaft side eccentric part 4d, respectively, and these upper roller 10 and The lower roller 11 is capable of eccentric rotational movement in the upper cylinder 7 and the lower cylinder 8. In the compression mechanism 100, the upper vanes 12 and the lower vanes 13 are slidably inserted in the upper cylinder 7 and the cylinder 8, respectively. These upper and lower vanes 12 and 13 are always in pressure contact with the upper roller 10 and the lower roller 11 by the biasing means 31 and 32 constituted by coil springs, respectively, and the upper and lower cylinders 7 and 8 with the upper and lower cylinders. The space formed between the rollers 10 and 11 is divided into a compression chamber and a suction chamber, respectively. Moreover, the compression mechanism part 100 arrange | positions the main shaft support 5 and the subordinate support 6 which support the crankshaft 4 at the both ends of which the upper and lower cylinders 7 and 8 and the partition plate 9 were laminated | stacked. The upper and lower cylinders 7 and 8, the partition plate 9, and the main shaft support 5 and the secondary support 6 are integrally fastened by two kinds of bolts 14 and 15 having different lengths. .

In the rotary compressor according to the first embodiment of the present invention configured as described above, the upper roller 10 and the lower roller 11 are formed inside the upper cylinder 7 and the cylinder 8 by rotating the rotor 3. Slide the slides. As a result, the refrigerant gas is sucked from the suction pipe 41 into the compression chamber, and the refrigerant sucked into the compression chamber is compressed. The compressed high pressure refrigerant gas is discharged into the sealed container 1 and discharged from the discharge pipe 42 to the outside of the sealed container 1.

By the way, in the rotary compressor which concerns on Embodiment 1 of this invention, heat processing (quenching process) is performed to the partition plate 9, and the hardness of the said partition plate 9 is the main shaft support 5 and the support base 6 It is configured to be higher than the hardness of). Thus, by making the hardness difference so that the hardness of the partition plate 9 may become higher than the hardness of the main shaft support 5 and the secondary bearing 6, the partition plate 9 rather than the main shaft support 5 and the secondary bearing 6 is made. ) Abrasion resistance can be improved.

Thereby, the supply amount of lubricating oil is small, and it is supplied to the upper and lower rollers 10 and 11 and the upper and lower vanes 12 and 13 of the compression mechanism part 100, and the main and auxiliary bearings 5 and 6 and the partition plate 9. Even when the lubricating oil is supplied with the partition plate 9 side delayed from the main and auxiliary bearings 5 and 6, the amount of wear of the partition plate 9 can be reduced. For this reason, a scratch and seizure of the partition plate 9 can be prevented and reliability can be improved.

In this way, the partition plate 9 is quenched to improve the wear resistance of the partition plate 9 than the main and secondary bearings 5 and 6, thereby reducing the processing cost and reducing the amount of abrasion of the partition plate 9. I can alleviate it.

Next, the assembly procedure of the compression mechanism part of the rotary compressor which concerns on Embodiment 1 of this invention is demonstrated. 2-7 is a figure which shows the assembling procedure of the compression mechanism part of the rotary compressor which concerns on Embodiment 1 of this invention.

(1) As shown in FIG. 2, first, the upper cylinder 7 and the main shaft bearing 5 are fastened and fastened with a short bolt 15. A plurality of bolts 15 are used.

(2) As shown in FIG. 3, the main shaft part 4a of the crankshaft 4 is inserted into the main shaft support 5 from the upper cylinder 7 side. Next, the upper roller 10 is externally wound on the crankshaft 4, the outer shaft is passed through in order of the sub-shaft 4b, the sub-axis side eccentric 4d, and the intermediate shaft 4e. It is assembled to the side eccentric part 4c. At this time, the upper vane 12 (FIG. 1) is assembled to the upper cylinder 7.

(3) As shown in FIG. 4, the partition plate 9 having improved abrasion resistance by heat treatment (quenching treatment) is enclosed on the crankshaft 4, and the minor shaft portion 4b and the minor shaft side eccentric portion 4d The outer side is passed in the order of) and assembled to the intermediate shaft portion 4e. In this state, as shown by the arrow, the partition plate 9 is moved only in the axial direction by passing the outer side of the sub-axial side eccentric portion 4d, so that the center of the partition plate 9 and the upper cylinder 7 ) Centers do not coincide.

(4) As shown in FIG. 5, the partition plate 9 is moved in the direction perpendicular to the axial direction, and set so that the center of the upper cylinder 7 is aligned. This aligns the position of the bolt passage hole 9b provided in the partition plate 9, the bolt passage hole 7a of the upper cylinder 7, and the bolt passage hole 5a of the spindle support 5, and the bolt described later. To make it pass.

(5) As shown in FIG. 6, the lower roller 11 is wound around the crankshaft 4, passed through the minor shaft portion 4b, and assembled to the minor shaft side eccentric portion 4d.

(6) In addition, while fixing the cylinder 8 and the support 6 with a short bolt 15 (multiple), the vane 13 (FIG. 1) is assembled to the cylinder 8; . It is wound around the minor shaft portion 4b of the crankshaft 4.

(7) As shown in FIG. 7, the cylinder 8 is sandwiched between the partition plates 9 from the outside of the support 6, and the upper cylinder 14 is provided by a long bolt 14 (plural). 7). In addition, the upper cylinder 7 is interposed between the partition plate 9 from the outer side of the main shaft support 5, and is fixed to the cylinder 8 by the long bolt 14 (plural number).

Next, the oil supply path of the rotary compressor according to the first embodiment of the present invention will be described. It is a figure which shows the oil supply path of the rotary compressor which concerns on Embodiment 1 of this invention. 9 is an enlarged detailed view of a main part of FIG. 8. It is a longitudinal cross-sectional view which shows the compression mechanism part of the rotary compressor which concerns on Embodiment 1 of this invention.

Since the compression mechanism part 100 is assembled as said (1)-(7), in the compression mechanism part 100, the space A between the partition plate 9 and the intermediate shaft part 4e (FIG. 7). ) In addition, a space B (hereinafter referred to as "B1") is formed between the upper roller 10, the main shaft side eccentric portion 4c, and the main shaft support 5. Similarly, the space B (hereinafter, referred to as "B2") is also generated between the lower roller 11, the minor shaft side eccentric portion 4d, and the minor bearing 6. At this time, the volume of the space A is larger than the volumes of the spaces B1 and B2. This is in the partition plate 9 arranged between the upper and lower cylinders 7 and 8, in the assembling step of (3) above, the minor axis side eccentric portion 4d of the crankshaft 4 (the middle of the crankshaft 4). This is because it is necessary to form a hole for passing the outside of the shaft portion 4e having a larger diameter.

Supply of lubricating oil to the compression mechanism part 100 of the rotary compressor of Embodiment 1 of this invention passes through the oil supply path of the crankshaft 4 from the oil storage part 30 of a compressor bottom part as shown in FIG. It is performed by centrifugal oil supply by rotation of the crankshaft 4 from (16, 17, 18, 19). Therefore, the oil supply amount increases in proportion to the rotational speed and the rotational speed of the crankshaft 4. In the low speed rotation operation, the supply amount of the lubricating oil into the compression mechanism part 100 decreases.

The oil supply to the upper and lower rollers 10 and 11 and the main support shafts 5 and 6 is routed from the oil supply holes 16 and 17 inside the main support shafts 5 and 6 as shown in FIGS. 8 to 10. It passes through C1 and C2, passes through the paths D1 and D2 from the oil supply holes 18 and 19 in the upper and lower rollers 10 and 11, and flows into the spaces B1 and B2, respectively. The oil supply to the partition plate 9 and the upper and lower rollers 10 and 11 passes through the paths E and F from the oil supply holes 18 and 9 inside the upper and lower rollers 10 and 11 and flows into the space A. Be refueled. Therefore, it becomes difficult to supply lubricating oil to the partition plate 9 and the main and auxiliary bearings 5 and 6 until the lubricating oil is filled in the spaces A and B1 and B2. That is, the space A and the spaces B1 and B2 serve as a deterrent to the lubricating oil supply to the partition plate 9 and the main support shafts 5 and 6.

As described above, the space A generated between the partition plate 9 and the intermediate shaft portion 4e includes the upper and lower rollers 10 and 11 and the main and secondary bearings 5 and 6, and the main and secondary shaft sides. Since it is larger than the spaces B1 and B2 generated between the eccentric portions 4c and 4d, the supply of lubricating oil to the partition plate 9 at the start of the compressor is delayed than the supply to the main and auxiliary bearings 5 and 6. Therefore, when intermittent starting and stopping in the low-speed rotational operation with a small supply amount of lubricating oil, the partition plate 9 is relatively deteriorated in lubricity with respect to the main and auxiliary bearings 5 and 6, and wear is likely to occur.

However, in the rotary compressor according to the first embodiment of the present invention, since the partition plate 9 having improved wear resistance by heat treatment (quenching treatment) is used, the partition plate 9 and the intermediate shaft portion 4e are used. Even if the space A generated is large, abrasion is hard to advance. As described above, the rotary compressor according to the first embodiment of the present invention is particularly effective in the case of having a compression mechanism part having a large space A, which is originally an obstacle for lubricating oil supply, in the middle of the lubricating oil supply path. Enlarging the space A makes it easy to assemble a compression mechanism part as mentioned later, and is effective for compacting a compression mechanism part. And in such a compressor, the durability of the partition plate 9 can be improved and long life can be aimed at.

In the case where the inner diameter of the partition plate 9 and the outer diameter of the intermediate shaft portion 4e of the crank shaft 4 are the same, ignoring the sub-axis side eccentric portion 4d of the crank shaft 4, the inner diameter of the partition plate 9 In order to rotate the crankshaft 4 without making the outer diameter of the intermediate shaft part 4e contact, it must assemble by performing high precision extraction.

Further, for example, as a method of reducing the space A between the inner diameter of the partition plate 9 and the intermediate shaft portion 4e of the crankshaft 4, the partition plate 9 is divided into two to form a half configuration. I think that. This will be explained with reference to FIGS. 15 and 16. 15 and 16 are longitudinal cross-sectional views each showing main parts of a comparative example of the rotary compressor. As shown in Fig. 15 and Fig. 16, the partition plate 9 is divided into partition plates 9L and 9R to be divided into two parts and inserted into the intermediate shaft portion 4e of the crankshaft 4 between the upper and lower cylinders 7, 8. There is a way to do it. However, even if this division and coalescence method is performed, partitioning is performed in order to make it possible to assemble without contacting the inner diameter of the partition plate 9 and the outer diameter of the intermediate shaft portion 4e without the need for high precision extraction. It is necessary to provide a clearance (gap) between the inner diameter of the plate 9 and the outer diameter of the intermediate shaft portion 4e.

As in the rotary compressor according to Embodiment 1 of the present invention, if the inner diameter of the partition plate 9 is larger than the outer diameter of the minor axis side eccentric portion 4d of the crankshaft 4, the space A becomes large as a result. The partition plate 9 is wound around the crankshaft 4 to allow the outside of the sub-axial side eccentric 4d to pass (FIGS. 4 and 5), and makes contact with the intermediate shaft 4e of the crankshaft 4. Assembling without doing becomes easy.

In general, a feature of the rotary compressor having a plurality of cylinders is that the distance between the bearing of the main bearing and the bearing of the secondary bearing is long. In operation, the crank shaft eccentric portion has a large bending angle. In order to reduce this, it is preferable to make the distance between bearings as small as possible.

As shown in Fig. 3, the upper roller 10 is wound around the sub-shaft 4b, and the axial length of the intermediate shaft 4e is the upper roller (4e) in order to pass the main roller side eccentric 4c without being caught in the axial direction. It is to be made longer than the axial length of 10), and the upper roller 10 after passing through the sub-axis side eccentric part 4d must be able to move to an axial direction linearly. In the rotary compressor according to the first embodiment of the present invention, the axial lengths of the intermediate shaft portions 4e corresponding to the upper and lower rollers 10 and 11 are not changed. The axial length of the eccentric part 4c and the sub-axis side eccentric part 4d is shortened in the direction of the partition plate 9 side. Thereby, although the spaces B1 and B2 (FIG. 7) mentioned above generate | occur | produce, the length of the whole crankshaft 4 can be suppressed, and the axial length of the intermediate shaft part 4e is made into the upper roller 10. FIG. Can be made relatively long relative to the axial length of For this reason, the compact compression mechanism part 100 can be assembled.

By the way, as another method of making the distance between the bearings small, the thickness of the intermediate shaft portion 4e in the axial direction, that is, the thickness of the partition plate 9 in the axial direction is made as thin as possible while making the length of the upper roller 10 longer than the axial length of the upper roller 10. I think. In addition, it is desirable that the partition plate be as thin as possible for miniaturization and resource saving. However, when the partition plate is made thin, the differential pressure deformation due to the shift of the timing of the pressure rise of the compression chambers on both sides of the partition plate is increased, and the partition plate is easily in contact with the rollers and the vanes.

As a technique corresponding to this, conventionally, surface treatment is applied to any one of the partition plate, the roller, the main and auxiliary bearings, and the crankshaft which are the sliding materials, or the surface hardness is improved, and the wear resistance is improved. It is preventing adhesion.

In the step of surface-treating the partition plate, first, degreasing treatment and washing are performed to remove oil from the surface of the raw material in order to increase the adhesiveness of the chemical agent to be the surface coating. Subsequently, in order to improve affinity with a chemical | medical agent, base treatment, such as a phosphate film | membrane formation, is performed, and after wash | cleaning again, surface film-forming process, such as molybdenum disulfide, is performed, it is made to dry, and is completed. In this way, the surface treatment is increased in cost because the number of steps of processing and the processing time are long.

On the other hand, the rotary compressor which concerns on Embodiment 1 of this invention performs hardening process on the partition plate 9, and improves abrasion resistance. Since a hardening process can be processed by heat processing and cooling by a high temperature furnace, fewer processes are required than surface treatment, and abrasion resistance can be improved in a short time and low cost.

In addition, here, the hardness of the partition plate 9 and the main and secondary bearings 5 and 6 is made different, and the hardness of the partition plate 9 is higher than the hardness of the main and secondary bearings 5 and 6. Although the wear of the partition plate 9 is reduced, the wear of the upper and lower rollers 10 and 11 and the upper and lower vanes 12 and 13 may be reduced. The method in that case will be explained in the second embodiment.

Embodiment 2 Fig.

In a rotary compressor, the sliding area of a roller and a vane is smaller than the sliding area of a bearing and a partition plate as mentioned later. Therefore, as a roller and a vane, the material whose hardness is higher than a bearing and a partition plate is used. Therefore, in order to reduce the wear of a roller and a vane, the hardness of the partition plate which heat-treated in Embodiment 1 mentioned above should be lower than the hardness of a roller and a vane. By heat-treating the partition plate so that hardness may become high in order of roller and vane> partition plate> bearing, the wear of a roller and a vane can be reduced, and also the wear of a partition plate can be reduced.

11A and 11B are explanatory views of the operation of the compression mechanism unit of the rotary compressor according to the second embodiment of the present invention, and illustrate aspects of the compression mechanism unit during one rotation of the upper and lower rollers. As shown in Fig. 11, the upper and lower rollers 10A and 11A slide by eccentric rotation in the upper and lower cylinders 7 and 8 between the partition plate and the main and secondary bearings, and the upper and lower vanes 12A and 13A reciprocate and slide. Doing.

It is a figure which shows the sliding area of the sliding member in the compression mechanism part of the rotary compressor which concerns on Embodiment 2 of this invention by hatching, (a) shows the sliding area of an up-and-down roller, and (b) is an up-and-down roller. The sliding area of the partition plate with respect to the upper and lower rollers per revolution is shown. As shown in Fig. 12 (a) and (b), the sliding area of the upper and lower rollers 10A and 11A is smaller than the sliding area of the partition plate 9 per one rotation of the upper and lower rollers 10A and 11A. Therefore, the top and bottom rollers 10A and 11A slide more intensively than the partition plate 9.

It is a figure which shows the sliding area of the sliding member in the compression mechanism part of the rotary compressor which concerns on Embodiment 2 of this invention by hatching, (a) shows the sliding area of a top and bottom vane, (b) is a top and bottom vane. It shows the sliding area of the partition plate or the main support bracket. As shown in Figs. 13A and 13B, the slide areas of the upper and lower vanes 12A and 13A are smaller than the sliding areas of the partition plate 9 and the main and secondary bearings 5 and 6. Therefore, the upper and lower vanes 12A and 13A slide more intensively than the partition plate 9 and the main and auxiliary bearings 5 and 6.

That is, the top and bottom rollers 10A and 11A and the top and bottom vanes 12A and 13A are compared with the partition plate 9 and the main and secondary bearings 5 and 6, and the partition plate 9 and the main and secondary bearings 5 In the case of having a hardness as in (6), wear and sintering tend to occur. When the hardness of the partition plate 9 is made higher than the hardness of the upper and lower rollers 10A and 11A and the upper and lower vanes 12A and 13A, the upper and lower rollers 10A and 11A and the upper and lower vanes 12A, 13A) is worn out.

It is a longitudinal cross-sectional view which shows the compression mechanism part of the rotary compressor which concerns on Embodiment 2 of this invention. In the rotary compressor according to the second embodiment of the present invention, the partition plate 9, the upper and lower rollers 10A, 11A, and the upper and lower vanes 12A, 13A are subjected to heat treatment (quenching treatment) as shown in FIG. Top and bottom vanes> partition plate> Hardness difference in order to increase the hardness in the order of the main and secondary bearings.

In general, gray cast iron or sintering is frequently used for compressor bearings in terms of availability, processability, and cost. As an example of the hardness, the thing of HRB65-110 (equivalent to HRC0-30) is used frequently. In the vanes and rollers, stainless steel with high hardness and cast iron of Ni Cr Mo are frequently used. As an example of the hardness, the HRC 45-70 thing is used frequently. Therefore, it is preferable to set the hardness of a partition plate to the range of HRC30-45.

Here, the hardness of the main and secondary bearings 5 and 6, the partition plate 9, the top and bottom rollers 10A and 11A, and the top and bottom vanes 12A and 13A was set in the following range.

Note: Supporting base: Rockwell B scale HRB 65 to 110 (HRC 0 to 30 equivalent)

Partition plate: Rockwell C scale HRC 30 to 40

Upper and lower rollers: Rockwell C scale HRC 45 to 55

Upper and lower vanes: Rockwell C scale HRC 55 to 70

As described above, in the rotary compressor according to Embodiment 2 of the present invention, heat treatment (quenching treatment) is performed on the partition plate 9, the upper and lower rollers 10A, 11A, and the upper and lower vanes 12A, 13A, and the upper and lower rollers and Upper and lower vanes> partition plate> Since the hardness difference is given so that the hardness increases in the order of the main and secondary bearings, it is possible to reduce the wear of the partition plates due to the sliding of the primary and secondary bearings 5 and 6. In addition, the wear of the upper and lower rollers 10A and 11A and the upper and lower vanes 12A and 13A due to the sliding to the partition plate 9 can be reduced.

1: sealed container 2: stator
3: rotor 4: crankshaft
4a: main shaft portion 4b: minor shaft portion
4c: main shaft side eccentric portion 4d: minor axis side eccentric portion
4e: middle shaft part 5: spindle support
5a, 7a, 9b: Bolt through hole 6: Support shaft
7: loss cylinder 8: cylinder
9: partition plate 10, 10A: upper roller
11, 11A: Harroller 12, 12A: Sao Bain
13, 13A: Haveyin 14, 15: Bolt
16, 17, 18, 19: oil supply hole 30: oil reservoir
31, 32: addition means 41: suction pipe
42: discharge tube 100: compression mechanism portion
200: motor parts A, B, B1, B2: space
C1, C2, D1, D2, E: Path

Claims (3)

It has a compression mechanism part and an electric motor drive part in a sealed container,
The compression mechanism unit,
A crankshaft having a plurality of eccentrics,
A plurality of cylinders arranged in correspondence with the respective eccentric portions of the crankshaft;
A partition plate disposed between the plurality of cylinders and supported by these cylinders,
A plurality of rollers disposed so as to be located in these cylinders, each of which the eccentric portions of the crankshaft are inserted;
The crankshaft is inserted into the main shaft support and the sub-axial support disposed at both ends of the stack of the cylinder and the partition plate;
A space surrounded by the cylinder, the spindle support, the partition plate, and the roller, and a space surrounded by the cylinder, the support shaft, the partition plate, and the roller, respectively, as two spaces of the compression chamber and the suction chamber, respectively. A plurality of vanes to be partitioned,
In a rotary compressor to repeat the suction and compression of the fluid by rotating the roller on the inside of the cylinder by the rotation of the crankshaft,
The partition plate is heat-treated, and the hardness difference is made to have a hardness difference so that the hardness of the partition plate may become higher than the hardness of the said main shaft support and the said minor support. The method of claim 1,
The roller and the vane are subjected to heat treatment, so that the hardness difference is made such that the hardness of these rollers and vanes becomes higher than the hardness of the partition plate. 3. The method according to claim 1 or 2,
The space A formed between the crankshaft and the partition plate that is wound around it is larger than the space B formed between each of the rollers, the main shaft bearing and the secondary bearing, and the eccentric portions, respectively. Rotary compressor characterized by.

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