WO2023125780A1 - Compresseur à spirale - Google Patents

Compresseur à spirale Download PDF

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Publication number
WO2023125780A1
WO2023125780A1 PCT/CN2022/143307 CN2022143307W WO2023125780A1 WO 2023125780 A1 WO2023125780 A1 WO 2023125780A1 CN 2022143307 W CN2022143307 W CN 2022143307W WO 2023125780 A1 WO2023125780 A1 WO 2023125780A1
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WO
WIPO (PCT)
Prior art keywords
scroll
hole
peripheral surface
crankshaft
oiling screw
Prior art date
Application number
PCT/CN2022/143307
Other languages
English (en)
Chinese (zh)
Inventor
孙玉松
叶航
张喜双
Original Assignee
丹佛斯（天津）有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CN202123449953.0U external-priority patent/CN217976583U/zh
Priority claimed from CN202111683043.0A external-priority patent/CN116412135A/zh
Application filed by 丹佛斯（天津）有限公司 filed Critical 丹佛斯（天津）有限公司
Publication of WO2023125780A1 publication Critical patent/WO2023125780A1/fr

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
    • F04C18/02—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C23/00—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids
    • F04C23/02—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/02—Lubrication; Lubricant separation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C3/00—Shafts; Axles; Cranks; Eccentrics
    • F16C3/04—Crankshafts, eccentric-shafts; Cranks, eccentrics
    • F16C3/06—Crankshafts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C3/00—Shafts; Axles; Cranks; Eccentrics
    • F16C3/04—Crankshafts, eccentric-shafts; Cranks, eccentrics
    • F16C3/06—Crankshafts
    • F16C3/14—Features relating to lubrication

Definitions

  • the present invention relates to a scroll compressor.
  • the oil pump in a co-rotating scroll compressor is poor at pumping oil at low speeds.
  • CRC co-rotating scroll compressor
  • the structure of the gear pump is complicated, the wear between the gears is large, and the reliability is poor.
  • the present invention has been made to solve the above-mentioned problems and potentially other technical problems.
  • Scroll compressors include:
  • the scroll assembly includes:
  • a second scroll located within the compressor housing, wherein the first scroll cooperates with the second scroll to form a compression chamber, and the first scroll and the second scroll rotate together;
  • the scroll compressor also includes:
  • the bracket is installed in the compressor housing
  • the flange is supported on the bracket and supports the first scroll and the second scroll, wherein the flange is connected to the first scroll;
  • the actuating mechanism is used to drive the flange to rotate, so as to drive the first scroll to rotate, and then drive the second scroll to rotate.
  • the second scroll includes a first hub; the scroll compressor further includes a crankshaft, which is located in the flange and cooperates with the first hub of the second scroll.
  • the flange includes:
  • the flange is connected to the first scroll through a tray, the crankshaft has an outer stepped surface, and the second hub of the flange has an inner stepped surface opposite to the outer stepped surface.
  • crankshaft is generally cylindrical and has:
  • the oiling screw is arranged in the axial through hole, the central axis of the oiling screw is parallel to the central axis of the crankshaft without overlapping;
  • an oil return hole is provided on the upper end surface of the crankshaft, and the oil return hole extends downward and penetrates the upper section and the lower section of the crankshaft, thereby forming an oil return passage.
  • the scroll compressor further comprises a support comprising a bearing or a bush or a washer, wherein the support is located on the same side of the compression chamber.
  • the supports may include:
  • a first sliding bearing located between the inner peripheral surface of the upper section of the crankshaft and the outer peripheral surface of the first hub of the second scroll, wherein a drive surface is provided on the outer peripheral surface of the first sliding bearing , wherein a first pin groove is provided on the inner peripheral surface of the upper section of the crankshaft, at least one first pin is embedded in the first pin groove and cooperates with the driving surface of the first sliding bearing;
  • a third sliding bearing located between the inner peripheral surface of the flange and the outer peripheral surface of the lower section of the crankshaft.
  • the support may also include:
  • a third thrust bearing located between the bottom face of the flange and the bracket.
  • the first hub of the second scroll has an inner hole, and the inner shape of the inner hole cooperates with the outer shape of the upper end of the oiling screw to fit the upper end of the oiling screw to the first hub of the second scroll. in the bore of the hub.
  • the outer peripheral surface of the upper end of the oiling screw is in interference fit with the inner peripheral surface of the inner hole of the first hub of the second scroll to prevent the oiling screw from rotating relative to the second scroll.
  • the outer peripheral surface of the upper end of the oiling screw includes a first matching surface
  • the inner peripheral surface of the inner hole of the first hub of the second scroll includes a second matching surface.
  • a second pin slot is opened on the outer peripheral surface of the upper end of the oiling screw, and a third pin slot is opened on the inner peripheral surface of the inner hole of the first hub of the second scroll.
  • the oiling screw and the second scroll are fixedly connected by the second pin embedded in the second pin groove and the third pin groove.
  • an external thread is provided on the outer peripheral surface of the upper end of the oiling screw, and an internal thread is provided on the inner peripheral surface of the inner hole of the first hub of the second scroll, through the connection between the external thread and the internal thread The threaded connection between the oiling screw and the second scroll is fixedly connected.
  • a stopper is provided on the outer peripheral surface of the upper end of the oiling screw, a retaining ring groove is provided on the inner peripheral surface of the inner hole of the first hub of the second scroll, and in the retaining ring groove A retaining ring is provided.
  • the stopper is embedded in the retaining ring groove, and the retaining ring clamps the stopper to prevent the upper end of the oiling screw from the second scroll. out of the inner bore of the first hub of the scroll.
  • the oiling screw is set as a threaded screw as a whole; or, the lower end of the oiling screw is set as a threaded screw; or the upper end and the lower end of the oiling screw are set as a threaded screw, and the middle section is non-threaded to connect the upper end and the lower end .
  • a coaxial first radial through hole, a second radial through hole and a third radial through hole are respectively provided at the lower end of the oiling screw, the lower end of the crankshaft and the lower end of the bracket, and the third pin passes through the The first radial through hole, the second radial through hole and the third radial through hole prevent the oiling screw, the crankshaft and the support from rotating relative to each other.
  • the scroll compressor further includes a thin-walled sleeve.
  • the thin-walled sleeve is arranged between the outer peripheral surface of the oiling screw and the inner peripheral surface of the axial through hole of the crankshaft, and the lower edge of the thin-walled sleeve is above the third pin to allow the thin-walled sleeve to be placed on the oiling screw. Free rotation between the outer peripheral surface of the crankshaft and the inner peripheral surface of the axial through hole of the crankshaft.
  • the actuating mechanism includes a disc motor, the disc motor includes a stator and a rotor, the stator is fixed in the compressor housing, and the rotor is connected with the flange to drive the flange to rotate.
  • a suction port is provided on the casing of the compressor.
  • the scroll compressor also includes a protective sleeve, the wall of which is located between the suction port and the scroll assembly.
  • the protective sleeve is of full cylindrical configuration; alternatively, the protective sleeve is of partial cylindrical configuration.
  • the diameter of the protective sleeve is fixed in the axial direction of the protective sleeve; or the diameter of the protective sleeve is variable in the axial direction of the protective sleeve.
  • a fourth radial through hole and a fifth radial through hole are provided on the crankshaft.
  • One end openings of the fourth radial through hole and the fifth radial through hole are located on the outer peripheral surface of the crankshaft, and the other end openings of the fourth radial through hole and the fifth radial through hole are located on the axial through hole of the crankshaft. on the inner surface.
  • a sixth radial through hole is provided on the crankshaft, one end opening of the sixth radial through hole is located on the outer peripheral surface of the crankshaft, and the other end opening of the sixth radial through hole communicates with the oil return passage.
  • the scroll compressor of the present invention has a more compact structure, miniaturization and light weight under the same refrigeration capacity
  • the bearings of the scroll compressor of the present invention have a shorter lubrication path, and the oil pump has higher efficiency and better performance. good;
  • the oiling screw has a simple structure, is not easy to wear, and has good reliability. At the same time, even when the compressor is running at a low speed, it can still maintain sufficient pumping oil to ensure the lubrication effect of the internal parts of the compressor.
  • FIG. 1A is a longitudinal sectional view of a scroll compressor according to an exemplary embodiment of the present invention
  • Fig. 1B is an exploded view of the scroll compressor shown in Fig. 1A, some components are omitted in Fig. 1B to make the drawing more concise;
  • Fig. 2 is a schematic diagram of the suction path, discharge path and lubricating path of the scroll compressor shown in Fig. 1A;
  • FIG. 3A is an exploded view of a modification of a scroll compressor according to an exemplary embodiment of the present invention, in which only some main components are shown;
  • FIG. 3B is a perspective view of a second scroll in the modification ;
  • Figure 3C is a longitudinal sectional view of some components in the modification in an assembled state;
  • Fig. 4A is an exploded view of another modified example of a scroll compressor according to an exemplary embodiment of the present invention, and only some main parts are shown in Fig. 4A;
  • Fig. 4B is a longitudinal sectional view of the parts shown in Fig. 4A;
  • Fig. 4C is a longitudinal sectional view of some components in this modification in an assembled state;
  • Fig. 5A is an exploded view of another modification example of a scroll compressor according to an exemplary embodiment of the present invention, and only some main components are shown in Fig. 5A;
  • Fig. 5B is some parts in the modification example in an assembled state
  • Figure 5C is a top view of the crankshaft;
  • Figure 5D is an enlarged view of the region D in Figure 5B;
  • FIG. 6A is a perspective view of a protective sleeve of a scroll compressor according to an exemplary embodiment of the present invention
  • FIG. 6B is a perspective view of a modified example of a protective sleeve of a scroll compressor according to an exemplary embodiment of the present invention
  • 7A to 7C are a perspective view, a plan view and a cross-sectional view, respectively, of another modified example of a protective sleeve of a scroll compressor according to an exemplary embodiment of the present invention.
  • FIG. 1A is a longitudinal sectional view of a scroll compressor according to an exemplary embodiment of the present invention.
  • Fig. 1B is an exploded view of the scroll compressor shown in Fig. 1A, some parts are omitted in Fig. 1B to make the drawing more concise.
  • a scroll compressor according to an exemplary embodiment of the present invention includes a compressor housing and a bracket 4 installed in the compressor housing, a scroll assembly (5, 6), an actuating mechanism 7.
  • Flange 8 multiple supports (such as bearings or bushings or washers) 11, 12, 13, 14, 15, 16 and crankshaft 9, etc.
  • the compressor shell includes an upper cover 1 , a middle shell 2 and a lower shell 3 .
  • a discharge port 1001 is provided on the upper cover 1 .
  • a discharge chamber 1002 is formed between the upper cover 1 and the top surface of the middle case 2 .
  • a suction port 2001 is provided on the middle shell 2 for sucking fluid (such as refrigerant).
  • An oil pool 31 is formed at the bottom of the lower case 3 for storing lubricating oil.
  • a plurality of feet 32 are provided on the bottom surface of the lower case 3, and fixing holes 33 are arranged on the legs 32, so that the lower case 3 can be fixed to a support (for example, the ground) by fasteners such as fixing bolts.
  • the stand 4 includes a hub 41 and a support arm 42 .
  • a plurality of threaded holes 43 are defined on the upper surface of the support arm 42 .
  • an oil leakage hole 44 is provided on the bottom surface of the joint between the support arm 42 and the hub 41 .
  • the bracket 4 can be fixed in the lower casing 3 of the compressor, for example, fixed in the lower casing 3 through the lower end of the hub 41 .
  • the scroll assembly includes a first scroll 5 and a second scroll 6 .
  • the second scroll 6 can rotate together with the first scroll 5 to define a compression chamber 56 between the first scroll 5 and the second scroll 6 .
  • the first scroll 5 has a scroll 51 extending downward and a central hole 52 at the top thereof.
  • the second scroll 6 has a first hub 61 extending downward and a wrap 62 extending upward. The wraps 51 and 62 are engaged with each other to form a compression chamber 56 .
  • the flange 8 is supported on the bracket 4 and includes a tray 81 , a second hub 82 and a central hole 83 .
  • a convex portion 831 and a concave portion 832 may be provided in the central hole 83 .
  • the upper surface 811 of the tray 81 supports the first scroll 5 and the second scroll 6 .
  • the flange 8 may be connected to the first scroll 5 through a tray 81 to drive the first scroll 5 to rotate.
  • the actuating mechanism 7 may be an axial flux motor (eg a disc motor) or a radial flux motor (eg an interior permanent magnet motor).
  • the speed of the motor can reach 40000rpm.
  • a disc motor includes a stator 71 and a rotor 72 .
  • the stator 71 can be fixed on the bracket 4 , or alternatively directly on the inner wall of the middle shell 2 .
  • the stator 71 has a plurality of windings 714 , a magnetic core 713 and an outer periphery 711 , and a plurality of threaded holes (or through holes) 712 are provided on the outer periphery 711 .
  • These threaded holes 712 correspond to the threaded holes 43 on the support arm 42 of the bracket 4 , so that the stator 71 can be fixed to the bracket 4 with a plurality of screws 18 .
  • the rotor 72 has a magnetic core, a central hole 722 and a downwardly extending hub 721 .
  • the central hole 722 of the rotor 72 is fixedly connected with the second hub 82 of the flange 8 (for example, through interference fit, spline fit, etc.) to drive the flange 8 to rotate, thereby driving the first scroll 5 and the second
  • the scrolls 6 rotate together, for example, the first scroll 5 is driven to rotate, and the gas force generated by the rotation of the first scroll 5 drives the second scroll 6 to rotate together.
  • the crankshaft 9 is located in the central hole 83 of the flange 8 and cooperates with the first hub 61 of the second scroll 6 .
  • the scroll compressor according to the exemplary embodiment of the present invention may further include the oiling screw 10 .
  • the upper end 101 of the oiling screw 10 is matched with the first hub 61 of the second scroll 6 , and the lower end 103 of the oiling screw 10 extends into the oil pool 31 .
  • the rotation of the second scroll 6 drives the oiling screw 10 to rotate, thereby pumping the oil in the oil pool 31 to other components inside the scroll compressor.
  • the crankshaft 9 is generally cylindrical and has an axial through hole 91 , an upper section 92 and a lower section 93 .
  • the oiling screw 10 is disposed in the axial through hole 91 , and the central axis O 2 of the oiling screw 10 is parallel to and not coincident with the central axis O 1 of the crankshaft 9 .
  • the oiling screw 10 is arranged eccentrically with respect to the crankshaft 9 .
  • the outer diameter and inner diameter of the upper section 92 of the crankshaft 9 are respectively larger than the outer diameter and inner diameter of the lower section 93, thereby forming an outer stepped surface 95 and an inner stepped surface 87 at the junction of the upper section 92 and the lower section 93 (see Figure 5C).
  • An oil return hole 97 is provided on the upper end surface 94 of the crankshaft 9 .
  • the oil return hole 97 extends downward and penetrates the upper section 92 and the lower section 93 , thereby forming oil return passages 99 and 100 .
  • all bearings 11 , 12 , 13 , 14 , 15 , 16 may only be provided on the same side of the compression chamber 56 . From the viewing angle of FIG. 1A , these supports are all located on the lower side of the compression chamber 56 .
  • these supports may comprise a first sliding bearing 11 , a second sliding bearing 12 and a third sliding bearing 13 .
  • the first slide bearing 11 is located between the inner peripheral surface of the upper section 92 of the crankshaft 9 and the outer peripheral surface of the first hub 61 of the second scroll 6 .
  • the second sliding bearing 12 is situated between the inner peripheral surface of the central bore 83 of the flange 8 and the outer peripheral surface of the upper section 92 of the crankshaft 9 .
  • the third slide bearing 13 is located between the inner peripheral surface of the central bore 83 of the flange 8 and the outer peripheral surface of the lower section 93 of the crankshaft 9 .
  • a first pin groove 96 is provided on the inner surface of the upper section 92 of the crankshaft 9 .
  • the first pin 19 is embedded in the first pin slot 96 and cooperates with the driving surface 111 of the first sliding support 11 .
  • the first sliding bearing 11 may comprise a substantially cylindrical sleeve body and a bearing sleeve interference-fitted within the sleeve body.
  • a concave portion 121 and a convex portion 122 may be provided on the outer peripheral surface of the second sliding support member 12 for cooperating with the convex portion 831 and the concave portion 832 in the central hole 83 of the flange 8 respectively. In this way, when the flange 8 rotates, it can drive the second sliding support 12 to rotate.
  • the second support member 12 may include a generally cylindrical sleeve body and a bearing sleeve interference fit within the sleeve body.
  • These supports also include a first thrust bearing 15 , a second thrust bearing 14 and a third thrust bearing 16 .
  • the first thrust bearing 15 is located between the inner step surface 84 of the flange 8 and the outer step surface 95 of the crankshaft 9 .
  • the second thrust bearing 14 is located between the lower surface of the second scroll 6 and the upper surface 811 of the tray 81 of the flange 8 .
  • the third thrust bearing 16 is located between the bottom face of the flange 8 and the junction of the hub 41 and the support arm 42 of the bracket 4 .
  • first thrust bearing 15 , the second thrust bearing 14 and the third thrust bearing 16 may be configured in the form of thrust washers or thrust bearings.
  • first thrust bearing 15 as an example, as shown in FIG. 1B , the first thrust bearing 15 may be configured in the form of a thrust washer.
  • a plurality of oil grooves 151 staggered from each other are arranged on the upper surface and the lower surface of the first thrust support member 15 for accumulating lubricating oil so as to form an oil film on the surface of the friction pair.
  • the oil groove 151 shown in FIG. 1B is generally in the shape of a rectangle. It should be understood that the oil groove 151 may also be in the shape of a circle or other suitable shapes.
  • the other thrust bearings 14 and 16 may be constructed similarly to the first thrust bearing.
  • the material constituting the thrust bearing may be wear-resistant metal or non-metallic material.
  • the first hub 61 of the second scroll 6 has an inner hole 63 (this inner hole is not visible in FIG. 1B , can refer to FIG. 3B ), and the inner shape of the inner hole is compatible with the outer shape of the upper end 101 of the oiling screw 10. fit, thereby allowing the upper end 101 of the oiling screw 10 to fit into the inner hole 63 of the first hub 61 of the second scroll 6 .
  • the outer peripheral surface of the upper end 101 of the oiling screw 10 is in interference fit with the inner peripheral surface of the inner hole 63 of the first hub 61 of the second scroll 6 to prevent the oiling screw 10 from moving against the second scroll. 6 turn.
  • the outer peripheral surface of the upper end 101 of the oiling screw 10 includes a first mating surface (the position indicated by the reference numeral "101" in FIG. 1B), and correspondingly, the second scroll
  • the inner peripheral surface of the inner bore 63 of the first hub 61 of the disc 6 comprises a second mating surface (this second mating surface is not visible in FIG. 1B ).
  • a stopper portion 102 is provided on the outer peripheral surface of the upper end 101 of the oiling screw 10 .
  • a retaining ring groove is provided on the inner peripheral surface of the inner hole of the first hub 61 of the second scroll 6 and the retaining ring 20 is provided in the retaining ring groove.
  • the scroll compressor according to the exemplary embodiment of the present invention further includes a protective sleeve 17 .
  • the cylinder wall 171 of the protective sleeve 17 is located between the suction port 2001 and the scroll assembly, so as to prevent the fluid (such as refrigerant) from directly impacting the scroll assembly when the scroll compressor sucks the fluid so as to damage the scroll assembly. Spin the assembly to cause damage.
  • the protective sleeve 17 generally has a cylindrical thin-walled configuration with a cylindrical wall 171 and a lower flange 172 .
  • a plurality of threaded holes (or through holes) 173 are provided on the lower flange 172 .
  • FIG. 6A shows a perspective view of the protective sleeve 17 .
  • an opening 170 is also provided on the lower flange 172 of the protective sleeve 17 to allow fluid to pass through the opening.
  • a fifth radial through hole 90 is provided on the crankshaft 9 .
  • One end opening of the fifth radial through hole 90 is positioned on the outer peripheral surface of the crankshaft 9, and the other end opening of the fifth radial through hole 90 is positioned on the inner peripheral surface of the axial through hole 91 of the crankshaft 9.
  • another or more sixth radial through holes 98 are provided on the crankshaft 9 .
  • One end opening of the sixth radial through hole 98 is located on the outer peripheral surface of the crankshaft 9 , and the other end opening of the sixth radial through hole 98 communicates with the oil return passage 99 .
  • the fifth radial through hole 90 is used to deliver the lubricating oil from the oil pool 31 to the parts to be lubricated in the scroll compressor; the sixth radial through hole 98 is used for oil return and can communicate Oil return passages 99 and 100.
  • FIG. 2 is a schematic diagram of a suction path, a discharge path, and a lubricating path of the scroll compressor shown in FIG. 1A .
  • FIG. 2 mainly shows two suction paths XQ1, XQ2, four lubrication paths RH1, RH2, RH3, RH4 and two oil return paths HY1, HY2.
  • the fluid paths inside the scroll compressor according to the exemplary embodiment of the present invention described below are only illustrative, not restrictive or exhaustive. In practical applications, more or fewer fluid paths may be provided.
  • the refrigerant enters the middle casing 2 of the scroll compressor through the suction port 2001, is blocked by the cylinder wall 171 of the protective sleeve 17 and flows upward, and then passes through the cylinder wall 171 and the scroll assembly. (Specifically, the first scroll 5 ) flows downward through the gap, and then enters the compression chamber 56 through the fluid channel provided in the tray 81 of the flange 8 and the first scroll 5 .
  • the refrigerant enters the middle casing 2 of the scroll compressor through the suction port 2001, is blocked by the cylinder wall 171 of the protective sleeve 17 and flows downward, and then passes through the stator 71 and the rotor of the actuating mechanism 7 72 and the gap between the central hole of the stator 71 and the outer peripheral surface of the flange 8, and then enter the compression chamber 56 through the fluid channel provided in the tray 81 of the flange 8 and the scroll assembly.
  • lubricating oil initially stored in the oil pool 31 rises to the second slide bearing 12 as the oiling screw 10 rotates, and then reaches the first thrust bearing 15 . Then, a part of the lubricating oil flows down through the oil return hole 97 into the oil return passage 99, and further enters the oil return passage 100; The gap on both sides of 11 flows down to the sixth radial through hole 98 , then enters the oil return passage 99 through the sixth radial through hole 98 , and further enters the oil return passage 100 . The lubricating oil in the oil return channel 100 finally flows back into the oil pool 31 . In this way, the oil return path HY1 is formed.
  • the lubricating oil initially stored in the oil pool 31 rises to the second thrust bearing 14 as the oiling screw 10 rotates, and then flows through the second thrust bearing 14 to the 8, the tray 81 and the fluid channel in the scroll assembly, and finally enters the compression chamber 56 together with the refrigerant.
  • the fluid in the compression chamber 56 flows into the discharge chamber 1002 through the center hole 52 at the top of the first scroll 5 and the center hole 2002 at the top of the middle shell 2, and then is discharged to the scroll compressor through the discharge port 1001 outside, thereby forming the discharge path PQ.
  • lubricating oil initially stored in the oil pool 31 rises to the fifth radial through hole 90 as the oiling screw 10 rotates. Flows to the third sliding bearing 13 via the fifth radial through-hole 90 . Then, a part of the lubricating oil flows upward to the first thrust bearing 15, thereby forming a lubrication path RH3, and another part of the lubricating oil flows downward to the third thrust bearing 16, thereby forming a lubrication path RH4.
  • the lubricating oil after lubricating the third thrust bearing 16 and the lubricating oil flowing down from above can flow on the bottom surface of the joint between the support arm 42 and the hub 41 , and finally flow back into the oil pool 31 through the oil leakage hole 44 . In this way, the oil return path HY2 is formed.
  • FIG. 3A is an exploded view of a modified example of a scroll compressor according to an exemplary embodiment of the present invention, and only some main components are shown in FIG. 3A .
  • Fig. 3B is a perspective view of the second scroll in this modification.
  • Fig. 3C is a longitudinal sectional view of some components in this modification in an assembled state.
  • FIGS. 3A to 3C differs from the above-described embodiments of the present invention in the manner in which the upper end 101 of the oiling screw 10 cooperates with the first hub 61 of the second scroll 6 .
  • second pins are provided on the outer peripheral surface of the upper end of the oiling screw 10 and the inner peripheral surface of the inner hole 63 of the first hub 61 of the second scroll 6, respectively.
  • the slot 104 and the third pin slot 64 fixedly connect the oiling screw 10 and the second scroll 6 through the second pin 21 embedded in the second pin slot 104 .
  • FIG. 4A is an exploded view of another modified example of a scroll compressor according to an exemplary embodiment of the present invention, in which only some main components are shown.
  • Fig. 4B is a longitudinal sectional view of the part shown in Fig. 4A.
  • Fig. 4C is a longitudinal sectional view of some components in the modified example in an assembled state.
  • FIGS. 4A to 4C differ from the embodiments of the invention described above in that:
  • External threads 104' are provided on the outer peripheral surface of the upper end 101 of the oiling screw 10, and internal threads are provided on the inner peripheral surface of the inner hole of the first hub 61 of the second scroll 6 (as shown in Figure 4B The position indicated by the reference numeral "63" in the above), the oiling screw 10 and the second scroll 6 are fixedly connected through the threaded connection between the external thread 104' and the internal thread;
  • the oiling screw 10 is configured as a threaded screw as a whole, thereby forming oiling threads 103' distributed along the entire outer peripheral surface of the oiling screw 10;
  • a fourth radial through-hole 89 is additionally provided in the lower section 93 of the crankshaft 9 .
  • the fourth radial through hole 89 is located above the original fifth radial through hole 90 .
  • the original sixth radial through hole 98 is blocked by the stopper 107 . In this way, lubricating paths and oil return paths can be formed slightly different from those in the embodiments of the present invention described above.
  • FIG. 5A is an exploded view of another modified example of a scroll compressor according to an exemplary embodiment of the present invention, in which only some main components are shown.
  • Fig. 5B is a longitudinal sectional view of some components in this modification in an assembled state.
  • Figure 5C is a top view of the crankshaft.
  • FIG. 5D is an enlarged view of area D in FIG. 5B.
  • FIGS. 5A to 5D differ from the embodiments of the present invention described above in that:
  • the oiling screw 10' is set as a threaded screw as a whole (that is, the entire outer surface of the oiling screw 10' is provided with threads 105, and the upper end 101 of the oiling screw 10' and the second scroll 6 are eliminated.
  • the connecting structure (such as a stopper, a retaining ring, etc.) between the inner holes of the first hub 61.
  • the upper end 101 of the oiling screw 10' and the second scroll 6 A clearance fit is formed between the inner holes of the first hub 61;
  • the lower end 103 "of the oiling screw 10', the lower end of the crankshaft 9 and the lower end of the bracket 4 are respectively provided with a coaxial first radial through hole 106, a second radial through hole 88 and a third radial through hole 45.
  • the elongated third pin 22 passes through these radial through holes to prevent the oiling screw 10', the crankshaft 9 and the bracket 4 from rotating relative to each other.
  • the stator 71 of the motor of the actuating mechanism 7 (not shown in FIGS. 5A and 5B ) will be fixed directly to the compressor housing and no longer to the support arms of the bracket 4; and
  • a thin-walled sleeve 23 is provided between the outer peripheral surface of the oiling screw 10' and the inner peripheral surface of the axial through hole of the crankshaft 9.
  • the lower edge of the thin-walled sleeve 23 is above the third pin 22 to allow the thin-walled sleeve 23 to freely rotate between the outer peripheral surface of the oiling screw 10' and the inner peripheral surface of the axial through hole of the crankshaft 9. In this way, when the thin-walled sleeve 23 is driven by the second scroll 6 to rotate, the lubricating oil can rise along the outer peripheral surface of the oiling screw 10' and be further supplied to the parts to be lubricated of the scroll compressor.
  • the upper end and the lower end of the oiling screw can be provided with threaded screws, and the middle section is non-threaded, connecting the upper end and the lower end.
  • FIG. 6B is a perspective view of a modified example of a protective sleeve of a scroll compressor according to an exemplary embodiment of the present invention.
  • the modification shown in FIG. 6B differs from the embodiment of the invention described above in that the protective sleeve 17' is a partial cylindrical (eg semi-cylindrical) structure rather than a complete cylindrical structure, As long as the cylinder wall 171 ′ can play the role of blocking the fluid from directly impacting the scroll assembly.
  • the positions and numbers of the threaded holes (or through holes) 173' and the openings 170' on the lower flange 172' of the protective sleeve 17' can be appropriately changed according to actual conditions.
  • FIGS. 7A and 7B are a perspective view and a top view, respectively, of another modified example of a protective sleeve of a scroll compressor according to an exemplary embodiment of the present invention.
  • Figure 7C is a cross-sectional view of the protective sleeve taken along plane C-C in Figure 7B.
  • FIGS. 7A to 7C differs from the previously described embodiment of the invention in that the diameter of the protective sleeve 17 ′′ varies in its axial direction, rather than being constant.
  • the protective sleeve 17 ′′ has a reduced-diameter section 174 .
  • This configuration of the protective sleeve 17" can extend the length of the fluid path, thereby reducing the impact force of the fluid.
  • this configuration of the protective sleeve 17" can enhance its own rigidity.
  • the thickness of the wall 171" of the protective sleeve 17" may be appropriate according to the actual situation.
  • the material of the protective sleeve can be suitable metal or non-metal material.
  • the protective sleeve 17 ′′ may also be configured as a partial cylindrical (eg semi-cylindrical) configuration instead of a complete cylindrical configuration.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Rotary Pumps (AREA)

Abstract

L'invention concerne un compresseur à spirale, comprenant : un boîtier (1, 2, 3) de compresseur, un carter d'huile (31) servant à stocker de l'huile de lubrification étant formé au fond du boîtier (1, 2, 3) de compresseur; un ensemble spirale, l'ensemble spirale comprenant une première plaque de spirale (5) située à l'intérieur du boîtier (1, 2, 3) de compresseur et une seconde plaque de spirale (6) située à l'intérieur du boîtier (1, 2, 3) de compresseur, la première plaque de spirale (5) et la seconde plaque de spirale (6) coopérant l'une avec l'autre pour former une chambre de compression (56), et la première plaque de spirale (5) ainsi que la seconde plaque de spirale (6) tournant ensemble; un mécanisme d'actionnement (7), le mécanisme d'actionnement (7) étant logé à l'intérieur du boîtier (1, 2, 3) de compresseur et étant utilisé pour entraîner la première plaque de spirale (5) en rotation, de façon à entraîner la seconde plaque de spirale (6) en rotation; et une tige de vis d'alimentation en huile (10), une extrémité supérieure (101) de la tige de vis d'alimentation en huile (10) étant reliée à la seconde plaque de spirale (6) de manière appariée, et une extrémité inférieure (103) de la tige de vis d'alimentation en huile (10) s'étendant dans le carter d'huile (31). Lorsque le compresseur à spirale fonctionne à faible vitesse, la quantité de pompage d'huile peut encore être maintenue de manière suffisante.
PCT/CN2022/143307 2021-12-31 2022-12-29 Compresseur à spirale WO2023125780A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CN202123449953.0U CN217976583U (zh) 2021-12-31 2021-12-31 涡旋压缩机
CN202111683043.0A CN116412135A (zh) 2021-12-31 2021-12-31 涡旋压缩机
CN202111683043.0 2021-12-31
CN202123449953.0 2021-12-31

Publications (1)

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WO2023125780A1 true WO2023125780A1 (fr) 2023-07-06

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0521195U (ja) * 1991-08-30 1993-03-19 岩田塗装機工業株式会社 スクロール流体機械
JP2014001678A (ja) * 2012-06-18 2014-01-09 Scroll Giken:Kk スクロール流体機械
JP2020037868A (ja) * 2016-12-12 2020-03-12 三菱重工業株式会社 両回転スクロール圧縮機
CN211422902U (zh) * 2017-03-06 2020-09-04 Lg电子株式会社 互相旋转型涡旋压缩机
CN111637056A (zh) * 2020-06-01 2020-09-08 珠海格力节能环保制冷技术研究中心有限公司 涡旋回转式压缩机及其控制方法、空调器
CN217976583U (zh) * 2021-12-31 2022-12-06 丹佛斯（天津）有限公司 涡旋压缩机

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0521195U (ja) * 1991-08-30 1993-03-19 岩田塗装機工業株式会社 スクロール流体機械
JP2014001678A (ja) * 2012-06-18 2014-01-09 Scroll Giken:Kk スクロール流体機械
JP2020037868A (ja) * 2016-12-12 2020-03-12 三菱重工業株式会社 両回転スクロール圧縮機
CN211422902U (zh) * 2017-03-06 2020-09-04 Lg电子株式会社 互相旋转型涡旋压缩机
CN111637056A (zh) * 2020-06-01 2020-09-08 珠海格力节能环保制冷技术研究中心有限公司 涡旋回转式压缩机及其控制方法、空调器
CN217976583U (zh) * 2021-12-31 2022-12-06 丹佛斯（天津）有限公司 涡旋压缩机

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