JP5100314B2 - Thrust slide bearing and scroll compressor having this thrust slide bearing - Google Patents

Description

  The present invention relates to a thrust sliding bearing used in, for example, a scroll compressor and a scroll compressor having the thrust sliding bearing.

  Conventionally, as a thrust slide bearing used in a scroll compressor or the like, one disclosed in Patent Document 1 is known. This thrust slide bearing prevents seizure by drawing lubricating oil into the sliding surface and forming an oil film. Also, Japanese Patent Application No. 2006-229774, which is an application by the applicant of the present application, has been devised to easily form an oil film by ensuring lubrication to the sliding surface in normal operation.

  However, the thrust load of the scroll compressor does not act uniformly, and is in a non-uniform state due to gas compression load, thermal deformation of peripheral components, and the like. Further, the sliding bearing has a small absorption allowance for an apparent negative clearance. That is, in the case of a thrust slide bearing, as shown in FIG. 8, a plate 5 having a certain thickness is used, and a plate having high rigidity is used in order to ensure wear resistance of the sliding surface. For this reason, if the clearance in the thrust direction is clogged due to thermal deformation or pressure deformation of the peripheral parts, the applied load becomes uneven, and the apparent clearance becomes negative, the absorption allowance for this is small. For this reason, there was a problem that an excessive load was generated and reliability was lowered due to seizure. In addition, since the set clearance changes due to the foreign matter such as wear powder or dust entering the plate sliding surface or the anti-sliding surface, a partly excessive load is generated. Particularly in the CO2 cycle, the gas constant is large, the temperature rise and the pressure rise are severe, so the thrust load is basically high and the influence is great.

  On the other hand, since the clearance in the thrust direction also affects the sealing performance of the scroll compressor, it cannot be increased more than necessary, and it is necessary to have an optimum rigidity because of conflicting factors between reliability and performance.

Japanese Patent No. 3426720

  The present invention has an object to solve the above-mentioned problems, and has a thrust slide bearing having high reliability and good performance that prevents the occurrence of apparent negative clearance and does not cause seizure or the like, and the thrust slide bearing. A scroll compressor is provided.

In order to solve the above problems, the first plate (13) and a second plate (15) that slides facing the first plate (13) are provided, and the first plate (13). When the second of the plates (15), receiving at least a second plate (15) is a thrust load, deformation, it can be adopted means having elasticity capable of performing uniform load.

  According to this measure, even when a thrust clearance with good performance is set, even if an overall or local deformation occurs, even if an apparent negative clearance occurs, the elastic second plate absorbs the deformation. Therefore, a good sliding surface can be secured with a uniform load, and seizure or the like can be prevented.

In order to solve the above problems, the second plate (15) has an uneven shape on both the sliding surface and the anti-sliding surface, and the uneven shape is formed by, for example, press molding. Therefore, manufacturing is easy and cost reduction can be achieved.
In particular, if an elastic part is provided on the anti-sliding surface side of the support-side plate that is susceptible to deformation due to gas compression or heat, there is no adverse effect on the sliding part due to the partial load generated by the deformation, Good lubrication and sliding are possible.

In order to solve the above problems, a scroll compressor (101) having the thrust sliding bearing (11) can be employed. Accordingly, seizure of the thrust bearing due to the negative clearance can be prevented and the reliability can be improved.

  In order to solve the above problems, the scroll compressor (101) can employ a means for CO2 having a high operating pressure and a severe lubrication state. Therefore, the reliability can be improved even in a CO2 compressor in which a negative clearance is likely to occur.

  In order to solve the above problems, the scroll compressor (101) can be a means applied to the heat pump system (215). Therefore, a highly reliable heat pump system can be provided.

  In addition, the code | symbol in the parenthesis attached | subjected to each said means is an example which shows a corresponding relationship with the specific means as described in embodiment mentioned later.

Hereinafter, embodiments of the present invention will be described with reference to FIGS . 1 and 2 .

Figure 1 illustrates a thrust sliding bearing 11 is the implementation of the invention. The thrust slide bearing 11 includes a first plate 13 and a second plate 15 that slides with the first plate 13.

  The back surface 13b of the first plate 13 is fixed to the first support 17 and a sliding surface 13a is formed on the front surface.

  The second plate 15 is obtained by processing the plate material 15a into a concavo-convex shape by pressing. The second plate 15 has sliding surfaces 15b scattered in an island shape on the first plate 13 side and concave grooves 15c surrounding the island-shaped sliding surface 15b. Further, on the side of the support 19 that supports the second plate 15, an island-shaped recess 15d is formed at a position corresponding to the island-shaped sliding surface 15b, and surrounds the island-shaped recess 15d. A ridge portion 15 e that abuts on 19 is formed.

  The second plate 15 is given elasticity in the vertical direction by the uneven processing of the plate material 15a, and when the interval between the first support 17 and the second support 19 changes, the change And a good sliding surface can be maintained with a uniform load. In addition, since press working is employed, manufacturing is easy and cost reduction can be achieved.

  FIG. 2 shows the actual clearance during operation and the load ratio from the normal load.

  As shown in FIG. 2, the spring constant of the thrust slide bearing 11 is set to 1/3 to ensure seizure resistance, and the upper limit is set to 1 1 so as not to affect performance degradation. Set to / 270. In the case of a conventional plain bearing having no elastic portion, as shown in FIG. 2, the load increases rapidly with a slight apparent negative clearance.

  As described above, in the thrust slide bearing 11, the second plate 15 is obtained by processing the plate material 15a into a concavo-convex shape by pressing or the like, so that an apparent negative clearance as a whole or locally is present. Even if it occurs, this negative clearance can be made uniform by the deformation of the second plate 15 which is an elastic body. Accordingly, it is possible to prevent a sudden increase in load due to the apparent negative clearance and to reduce the working surface pressure, thereby preventing seizure and the like.

  On the other hand, in order to prevent an increase in load due to the apparent negative clearance, the same effect should be expected if there is sufficient deformation allowance in parts other than the bearing, without adding a special configuration to the thrust bearing. is there. Therefore, if the member supporting the bearing has a deformation margin in the thrust direction, the thrust bearing itself may be a rigid body.

  However, as will be described later, the member that supports the bearing is usually usually firmly fixed to the housing or the like, and the deformation amount is usually small. Even if it can be deformed, it is difficult to control the range, direction, degree, etc. of the deformation.

  Even if the range, direction, degree, etc. of the deformation can be limited, the appearance of the apparent negative clearance itself is often caused by distortion in the thrust bearing or in the vicinity thereof, and the inclusion of foreign matter. In order to cope with these distortions and bites by instantly finely deforming, it is necessary to provide an apparent negative clearance absorbing function as close to the bearing as possible.

  For this reason, in the thrust slide bearing 11 of this embodiment, the second plate 15 is obtained by processing the plate material 15a into a concavo-convex shape by pressing or the like. Without any influence, it is possible to respond quickly and finely to distortion and foreign matter biting generated in or near the thrust bearing, and the load can be made uniform.

  Moreover, since it can respond sensitively to small fluctuations, the load can be distributed even if the surface roughness of the sliding surface is somewhat rough. Therefore, it is possible to set the processing accuracy of the sliding surface to be low to some extent, so that the workability can be improved and the cost can be reduced.

  Furthermore, with such a configuration, the clearance in the thrust direction can always be adjusted to 0 or more.

FIG. 3 shows Reference Example 1 of the present invention.

  A thrust slide bearing 21 shown in FIG. 3 has a first plate 13 and a second plate 23. The second plate 23 has a coating made of an elastic material on both sides of the rigid plate 25, a sliding side coating 27 on the first plate 13 side, and a support side coating on the opposite side of the first plate 13. 29. The back surface 29 a of the support side coating 29 is fixed to the second support body 19.

  The second plate 23 is elastically deformable in a direction perpendicular to the sliding surface by an elastic sliding side coating 27 and a supporting side coating 29, and the first supporting body 17 and the second supporting body. When the interval with 19 fluctuates, the fluctuation can be absorbed.

In the thrust slide bearing 21 of the first reference example , the sliding side coating 27 and the supporting side coating 29 are not simply improved in slidability but are formed of an elastic body so as to be deformable in the thrust direction. The clearance is absorbed sufficiently. Conventionally, some surface treatments have been added to improve slidability (decrease in friction loss) and wear resistance, but the film thickness is less than 1% of the base material thickness. It did not exhibit sufficient elasticity.

4 (a) to 4 (c) show Reference Examples 2 to 4 of the present invention.

  As for the thrust slide bearing 31 shown to Fig.4 (a), the 2nd plate 33 whole is comprised from elastic bodies, such as aluminum, a casting, resin, and a sintered material. In this way, since the second plate itself can be deformed in the thrust direction, the load can be made uniform. Moreover, since it is only necessary to form the entire second plate 33 from a single material, the manufacturing cost can be reduced.

  In the thrust slide bearing 41 shown in FIG. 4B, the second plate 43 has a shape in which the elastic body 43b is sandwiched between two rigid plates 43a. Such a thrust slide bearing 41 can be deformed in the thrust direction by the elastic body 43b and can not only make the load uniform, but also can maintain the required rigidity by the rigid plate 43a.

  A thrust slide bearing 51 shown in FIG. 4C is a structure in which the second plate 53 has a hollow structure and has elasticity. The thrust slide bearing 51 can be deformed in the thrust direction because of the hollow structure, can make the load uniform, and does not require an elastic material, so that the manufacturing cost can be reduced.

FIGS. 5A to 5C show Reference Examples 5 to 7 of the present invention.

  The thrust plain bearing 61 shown in FIG. 5A has a second plate 63 having a sliding portion 63a and a foot portion 63b formed integrally protruding from the sliding portion 63a. The part 63b is an elastic part that absorbs the negative clearance. By doing in this way, the 2nd plate 63 can be comprised as one component, and reduction of cost can be aimed at.

  In the thrust slide bearing 71 shown in FIG. 5B, the second plate 73 has a sliding plate 75 and a concavo-convex plate 77 bonded and fixed to the sliding plate 75. , A substrate 77a, and a projection 77b protruding from the substrate 77a and fixed to the sliding plate 75. Even in such a configuration, the negative clearance can be absorbed by the elasticity of the uneven plate 77.

  In the thrust slide bearing 81 shown in FIG. 5C, the second plate 83 has a sliding plate 85 and a coating 87 such as a resin formed on the side opposite to the sliding surface of the sliding plate 85; have. Even in such a configuration, the negative clearance can be absorbed by the elasticity of the coating 87. Moreover, since it is only necessary to form the coating 87 on the sliding plate 85, the cost can be further reduced.

  In the thrust slide bearings 11, 21, 31, 41, 51, 61, 71, 81, only the case where the second plate has elasticity is described. However, the present invention is not limited to this. Of course, both the second plate and the second plate may be elastic.

Figure 6 shows a scroll-type compressor 101 which forms the upper you facilities are applied. Hereinafter, a compressor for a water heater used in a refrigeration circuit using carbon dioxide refrigerant and the pressure of discharged carbon dioxide exceeding the critical pressure will be described as an example, but the present invention is not limited thereto.

  The scroll compressor 101 is a hermetic electric compressor in which an electric motor part 127 and a compression mechanism part 110 are housed in a hermetic container 113.

  The sealed container 113 includes a cylindrical case 113a having a cylindrical shape, a motor side end case 113b and a compression mechanism side end case 113c assembled to both ends of the cylindrical case 113a.

  The electric motor unit 127 includes a stator 125 fixed to the inner peripheral surface of the cylindrical case 113a and a rotor 123 fixed to the shaft 121 that is rotationally driven by the electric motor unit 127.

  The compression mechanism 110 is a movable scroll that revolves by a middle housing 115 fixed at a position adjacent to the stator 125 in the cylindrical case 113a and a crank mechanism 128 supported by a main bearing 117 provided in the middle housing 115. 132 and a fixed scroll 138 which is fixed to the cylindrical case 113a on the side opposite to the stator 125 of the middle housing 115 and is disposed opposite to the movable scroll 132 to form a working chamber 145 which will be described later.

  The shaft 121 includes a sub bearing 119 fixed to a disk-like support member 114 provided between the stator 125 and the motor side end case 113b in the cylindrical case 113a, and the main bearing 117. It is supported almost horizontally.

  The movable scroll 132 includes a substantially disc-shaped movable side plate 133, a movable side spiral 141 erected in an involute curve shape from the end surface of the movable side plate 133 toward the fixed scroll 138, and an end surface opposite to the movable side spiral 141. A boss portion 135 is provided standing in a cylindrical shape toward the middle housing 115 side.

  The fixed scroll 138 includes a fixed side plate 139 fixed to the cylindrical case 113a, and a fixed side spiral 143 formed by a spiral groove provided on the end surface of the fixed side plate 139 on the movable scroll 132 side.

  The middle housing 115 has a three-stage cylindrical shape that gradually increases in diameter from the motor part 127 side to the fixed scroll 138 side, and the smallest diameter cylinder 115a close to the motor part 127 constitutes the main bearing 117. The middle cylinder 115b constitutes a crank chamber 129 for accommodating the crank mechanism 128, and the largest diameter cylinder 115c near the fixed scroll 138 forms a scroll accommodating portion 131 for accommodating the movable scroll 132 therein, and a cylindrical case 113a. It is being fixed to the inner peripheral surface of this by fixing means, such as shrink fitting.

  The crank mechanism 128 includes an eccentric shaft 137 and a boss portion 135 of the movable scroll 132 that are integrally provided at the end of the shaft 121 on the compression mechanism portion 110 side. The eccentric part 137 is provided so as to be eccentric by a predetermined amount from the axial centers of the main bearing 117 and the sub bearing 119.

  The end face on the side of the movable scroll 132 (hereinafter referred to as the disc part scroll side end face 115e) of the disc part 115d connecting the large diameter cylinder 115c and the middle cylinder 115b constituting the middle housing 115 is provided with an Oldham (not shown). A coupling is disposed to prevent the movable scroll 132 from rotating. As a result, only the revolution of the movable scroll 132 is allowed. The compression mechanism unit 110 includes a plurality of working chambers 145 formed by meshing of the movable-side spiral 141 and the fixed-side spiral 143 so that the movable scroll 132 is swung with respect to the fixed scroll 138 to reduce the volume. The refrigerant supplied to the suction chamber 146 communicating with the outermost peripheral side of the spiral 143 is compressed.

  Here, the thrust slide bearings 11, 21 described above are provided between the disk portion scroll side end surface 115 e and the end surface of the movable scroll 132 on the side where the boss portion 135 is provided (hereinafter referred to as the movable scroll back surface 132 a). 31, 41, 51, 61, 71 and 81 are arranged.

  This thrust slide bearing 11, 21, 31, 41, 51, 61, 71, 81 results in the difference between the compression reaction force when compressing the refrigerant and the thrust force due to the pressure on the movable scroll back surface 132a side. While receiving the axial force that the movable side plate 133 receives (in this embodiment, the force that pushes the movable side plate 133 from the fixed scroll 138 side toward the disk portion 115d), the movable scroll back surface 132a and the disk portion scroll side end surface 115e Is a sliding bearing.

  The suction chamber 146 is provided on the side surface of the fixed side plate 139, and is connected to a suction pipe 147 that passes through the cylindrical case 113a and sucks refrigerant from a refrigerant circuit outside the sealed container 113.

  A discharge port 149 that penetrates the fixed side plate 139 in the axial direction is provided at the center of the fixed side spiral 143. The refrigerant compressed by the movable scroll 132 and the fixed scroll 138 is discharged from the discharge port 149 to the discharge chamber 150.

  The discharge chamber 150 has an end surface of the fixed side plate 139 opposite to the movable scroll 132 (hereinafter referred to as a fixed scroll back surface 138a) and an end surface of the separator block 155 fixed to the fixed scroll back surface 138a on the fixed side plate 139 side. It is comprised by the provided recessed part. A discharge valve 161 for preventing the discharged refrigerant from flowing backward is disposed in the discharge chamber 150.

  The high-temperature and high-pressure refrigerant discharged into the discharge chamber 150 is guided to the oil separator 163 through the refrigerant channel 157 extending upward from the discharge chamber 150.

  The oil separator 163 is a centrifugal oil separator having an inner cylinder 163a and an outer cylinder 163b, and has a double cylindrical shape.

  The refrigerant flow path 157 extends upward from the discharge chamber 150 along the fixed scroll back surface 138a, and then is connected to the space between the inner cylinder 163a and the outer cylinder 163b of the centrifugal oil separator 163 in a substantially tangential direction. Yes. The refrigerant that has flowed into the space between the inner cylinder 163a and the outer cylinder 163b swirls in the space between the inner cylinder 163a and the outer cylinder 163b, and after the oil contained in the refrigerant is centrifuged, the refrigerant in the inner cylinder 163a Through the discharge pipe 159 and sent to the refrigerant circuit outside the sealed container 113. In addition, the space between the separator block 155 and the compression mechanism side end case 113c has a low-pressure atmosphere as compared with the pressure of the discharged refrigerant.

  The oil separated by the oil separator 163 is stored in the high pressure oil storage chamber 165 through the small diameter hole 164.

  The oil stored in the high-pressure oil storage chamber 165 is guided to the oil passage 169 through the oil return passage 167. A small-diameter restricting portion 167a is provided at the outlet of the oil return passage 167. The outlet of the oil passage 169 opens in the inner wall of the boss portion 135 so as to communicate with the space between the end portion of the shaft 121 and the bottom surface of the boss portion 135.

  The oil guided to the space between the end portion of the shaft 121 and the bottom surface of the boss portion 135 flows into the oil passage 171 that penetrates the shaft 121 in the axial direction.

  The oil that has passed through the oil passage 171 is guided between the motor-side end case 113 b and the support member 114 in the sealed container 113. The support member 114, the middle housing 115, and the fixed side plate 139 have a gap (not shown) between the cylindrical case 113 a, and the oil guided between the motor side end case 113 b and the support member 114 is sealed container 113. It is stored below in the whole area. A lower pressure oil storage chamber 166 is formed below the entire region in the sealed container 113.

  The oil stored in the low-pressure oil storage chamber 166 reaches the scroll housing 131 through the oil return hole 173 provided below the middle housing 115.

  In the oil passage 171, radial holes 171 a and 171 b are provided to branch from the oil passage 171 at portions corresponding to the main bearing 117 and the sub-bearing 119.

  The outlet of the radial hole 171a communicates with a shaft groove 121a provided in the shaft 121. The oil flowing into the radial hole 171a lubricates the main bearing 117, the crank mechanism 128, and the thrust bearing 153, and then stores the scroll. Part 131 is reached. The middle cylinder 115b is formed with an oil groove 172 that communicates the radial hole 171a and the thrust bearing 153 above the shaft 121 in order to guide oil to the thrust bearing 153 above the shaft 121. Yes.

  On the other hand, the oil that has flowed into the radial hole 171 b lubricates the sub-bearing 119 and then falls into the low-pressure oil storage chamber 166 and reaches the scroll housing 131 through the oil return hole 173.

  The oil return passage 167, the oil passages 169 and 171 and the radial hole 171a supply oil to the thrust bearing 153 by the pressure difference between the pressure of the oil separated by the oil separator 163 and the pressure of the portion where the thrust bearing 153 is disposed. Oil supply means to do.

  The oil reaching the scroll housing 131 is supplied to the sliding surfaces of the movable scroll 132 and the fixed scroll 138, compressed together with the refrigerant in the working chamber 145, and again separated from the refrigerant by the oil separator 163.

  As described above, in the scroll compressor 101, the scroll slide bearings 11, 21, 31, between the disk portion scroll side end surface 115 e of the middle housing 115 and the movable scroll back surface 132 a of the movable scroll 132 are arranged. 41, 51, 61, 71, 81 are provided, respectively, and have second plates 15, 23, 33, 43, 53, 63, 73, 83 having elasticity. Therefore, even if a negative clearance is generated entirely or locally in the thrust direction due to thermal deformation or pressure deformation of peripheral parts, the second plates 15, 23, 33, 43, 53, 63 having elasticity are elastic. , 73, 83 can be absorbed by deformation. Therefore, generation | occurrence | production of the excessive load between bearings can be prevented and generation | occurrence | production of seizure etc. can be prevented.

  Here, in such a scroll compressor, a method in which the middle housing 115 and the fixed scroll 138 have a certain degree of elasticity and the negative clearance is absorbed by the deformation thereof can be considered. However, the middle housing 115 is firmly fixed to the sealed container 113, and its deformation amount is small. The middle housing 115 guides not only the support of the movable scroll 132 but also the shaft support of the shaft 121, the crank mechanism 128, and the like. In addition, the movable scroll 132 meshes with the fixed scroll 138 so that the working chamber 145 is airtight. Therefore, if the middle housing 115 and the movable scroll 132 are made elastic, the shaft support of the shaft 121 and the crank mechanism 128 may be hindered, and the airtightness of the working chamber 145 may not be maintained.

  Furthermore, the occurrence of the negative clearance itself is often due to distortion in the thrust bearing or in the vicinity thereof, or the inclusion of foreign matter. Therefore, in order to deal with these distortions and pinchings with instant and fine deformation, it is necessary to provide a negative clearance absorbing function as close to the bearing as possible.

  For this reason, in the scroll compressor 101 of this embodiment, the thrust slide bearings 11, 21, 31, 41, 51, 61, 71, 81 having the negative clearance absorbing function as described above. Is provided between the disk portion scroll side end surface 115e of the middle housing 115 and the movable scroll back surface 132a of the movable scroll 132 to prevent seizure due to a negative clearance and improve reliability.

  When the thrust slide bearings 11, 21, 31, 41, 51, 61, 71, 81 are applied to a scroll compressor, the first plate is the movable scroll 132 side, and the second plate is the middle housing 115 side. Alternatively, the first plate may be the middle housing 115 side and the second plate may be the movable scroll 132 side.

  FIG. 7 shows an oil storage type hot water supply apparatus 201 using the scroll compressor 101.

  The hot water storage type hot water supply apparatus 201 mainly includes a hot water storage tank 213, a heat pump device 215, and a control device 217.

  The hot water storage tank 213 can retain hot water for hot water supply, and an introduction pipe 221 for introducing tap water into the hot water storage tank 213 is connected to the bottom surface thereof. The introduction pipe 221 is provided with a thermistor 223 and outputs temperature information of tap water flowing through the introduction pipe 221 to the control device 217.

  On the other hand, a lead-out pipe 227 for leading out hot water in the hot water storage tank 213 is connected to the uppermost part of the hot water storage tank 213. A tap water supply pipe 229 is connected to the outlet pipe 227, and a mixing valve 231 is arranged at the junction with the water supply pipe 229. Then, by adjusting the mixing ratio of hot water from the hot water storage tank 213 and tap water, hot water of an appropriate temperature is supplied to the shower, bath, etc. on the downstream side.

  Further, a cold water outlet 233 is provided at the lower part of the hot water storage tank 213, and a hot water inlet 235 through which hot water flows into the hot water storage tank 213 is provided at the upper part of the hot water storage tank 213. The cold water outlet 233 and the hot water inlet 235 are connected by a circulation circuit 237, and a pump 239 and a water heat exchanger 241 of the heat pump device 215 are connected in series to the circulation circuit 237. And the cold water of the hot water storage tank 213 lower part is circulated with the pump 239, is heated with the water heat exchanger 241, and returns to the hot water storage tank 213.

  Further, a plurality of thermistors 243 are arranged in the vertical direction on the outer wall surface of the hot water storage tank 213, and temperature information at each water level in the hot water storage tank 213 is output to the control device 217.

The heat pump device 215 is a heating means using CO ₂ as a refrigerant, and the outdoor heat exchanger 251 including the scroll compressor 101, the water heat exchanger 241, the expansion valve 247, and the blower 249 is arranged in this order in the refrigerant pipe. 253 are connected to form a closed circuit. The scroll compressor 101 is connected to an inverter 255 so that the power supplied to the electric compressor 245 can be varied. The outdoor heat exchanger 251 is provided with an outside air temperature sensor 257, and outputs temperature information of the outside air flowing into the outdoor heat exchanger 251 to the control device 217.

  The scroll compressor 101 of such a heat pump device 215 is provided with scroll slide bearings 11, 31, 41, 51 between the middle housing 115 and the movable scroll 132, and each has a plate having elasticity in the thrust direction. ing. Therefore, even if a negative clearance is generated entirely or locally in the thrust direction due to thermal deformation or pressure deformation of the peripheral components, this can be absorbed by the elastic portion. Therefore, the reliability as a compressor can be improved, and the reliability of the whole heat pump apparatus 215 can be improved.

  The heat pump device 215 converts the refrigerant to a high temperature and high pressure by the scroll compressor 101 and sends it to the water heat exchanger 241, where the cold water (tap water) supplied from the hot water storage tank 213 is heated and boiled to a predetermined temperature. The hot water is returned to the hot water storage tank 213. The outdoor heat exchanger 251 absorbs heat from the outside air with respect to the refrigerant radiated by the water heat exchanger 241.

  The control device 217 mainly controls the operation of the scroll compressor 101 and the pump 239. Temperature information from the outside air temperature sensor 257 and temperature information from the thermistors 223 and 243 are input to the control device 217. In addition, temperature and water level information from a plurality of thermistors 243 are input to the control device 217. Based on these information, the scroll compressor 101 and the pump 239 are appropriately driven to supply hot water of a predetermined temperature and a predetermined amount or more to the hot water storage tank 213.

  As described above, the oil storage type hot water supply apparatus 201 includes the hot water storage tank 213, the heat pump apparatus 215, and the control apparatus 217. The heat pump apparatus 215 uses CO2 refrigerant, and the above-described thrust slide bearings 11, 31, 41 are used. , 51 is provided, a hot water storage hot water supply apparatus having high reliability can be realized.

  In the above embodiment, the case where the thrust slide bearing is applied to a scroll type compressor is described. However, the present invention is not limited to this and can be applied to other compressors that require a thrust bearing. Of course.

Sectional view showing a thrust sliding bearing of the implementation of the invention. The figure which shows the spring constant of a thrust slide bearing. Sectional drawing which shows the thrust slide bearing of the reference example 1 of this invention. (A), (b), (c) is sectional drawing which respectively shows the thrust slide bearing of the reference example 2 thru | or reference example 4 of this invention. (A), (b), (c) is sectional drawing which respectively shows the thrust slide bearing of the reference example 5 thru | or reference example 7 of this invention. Sectional drawing which shows the scroll compressor to which the thrust slide bearing shown in FIG.1, FIG.3, FIG.4 and FIG. 5 was applied. Schematic which shows the hot water storage type hot water supply apparatus with which the scroll type compressor shown in FIG. 6 was applied. It is a figure which shows the state of a negative clearance, Comprising: Sectional drawing which shows the case of a slide bearing.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Thrust slide bearing 13 1st plate 15 2nd plate 21 Thrust slide bearing 23 2nd plate 25 Rigid board 27 Sliding side coating 29 Support side coating 31 Thrust slide bearing 33 2nd plate 41 Thrust slide bearing 43 1st 2 plate 43a rigid plate 43b elastic body 51 thrust sliding bearing 53 second plate 61 thrust sliding bearing 63 second plate 63b foot 71 thrust sliding bearing 73 second plate 77 uneven plate 81 thrust sliding bearing 83 second plate Plate 85 Sliding plate 87 Coating 101 Scroll compressor 215 Heat pump device

Claims (4)

A first plate (13) comprises a second plate (15) and which slides facing this first plate (13), these first plate (13) second plate (15 of), at least a second plate (15) is not perforated elastic, and
The second plate (15) has an anti-sliding surface fixed to the second support, and both the sliding surface and the anti-sliding surface have an uneven shape. Bearing (11). A scroll compressor (101) comprising the thrust slide bearing (11) according to claim 1 . The scroll compressor (101) according to claim 2 , wherein the scroll compressor (101) is a compressor for CO2 having a high operating pressure and a severe lubrication state. The scroll compressor (101) according to claim 2 or 3 , wherein the scroll compressor (101) is applied to a heat pump system (215).

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