CN115750368A - Pump body subassembly and compressor - Google Patents
Pump body subassembly and compressor Download PDFInfo
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- CN115750368A CN115750368A CN202211521173.9A CN202211521173A CN115750368A CN 115750368 A CN115750368 A CN 115750368A CN 202211521173 A CN202211521173 A CN 202211521173A CN 115750368 A CN115750368 A CN 115750368A
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Abstract
The invention discloses a pump body assembly and a compressor, and relates to the technical field of compressors, wherein the pump body assembly comprises an upper bearing, a crankshaft and an end cover. The upper bearing is provided with a shaft hole and an oil return hole, the crankshaft is rotatably arranged in the shaft hole, the end cover is provided with a central hole for the crankshaft to pass through, and the end cover is connected to the upper bearing and surrounds the upper bearing to form an oil storage cavity. The end cover is connected to the upper bearing, the end cover and the upper bearing are enclosed to form an oil storage cavity, the upper end of the shaft hole of the upper bearing is communicated with the oil storage cavity, lubricating oil flowing out upwards from the shaft hole of the upper bearing is collected by the oil storage cavity, the upper bearing is provided with an oil return hole communicated with the oil storage cavity and the shaft hole, the lubricating oil collected by the oil storage cavity flows back to the shaft hole through the oil return hole, oil circuit circulation is formed, sufficient oil is supplied between the upper bearing and the crankshaft, an effective oil film is formed, abrasion of the crankshaft and the upper bearing is reduced, and the running reliability of the compressor is improved.
Description
Technical Field
The invention relates to the technical field of compressors, in particular to a pump body assembly and a compressor.
Background
In the related art, when the rotary compressor operates, the crankshaft is subjected to bending deformation under the action of magnetic pulling force, gas force and the like of the motor, so that metal contact friction is easily generated between the crankshaft and the upper bearing, and abnormal abrasion between the crankshaft and the upper bearing is caused. Especially, in the rotary compressor, when the rotary compressor is just started or during a high-load operation, the lubricating oil flows out from the shaft hole of the upper bearing, so that the thickness of an oil film at the upper end and the root of the upper bearing of the crankshaft is insufficient, and the abrasion degree of the crankshaft and the upper bearing is further increased.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides the pump body assembly which can effectively reduce the abrasion of the crankshaft and the upper bearing and improve the reliability of the compressor.
The invention also provides a compressor with the pump body assembly.
According to an embodiment of the first aspect of the invention, the pump body assembly comprises: the upper bearing is provided with a shaft hole and an oil return hole; the crankshaft is rotatably arranged in the shaft hole; the end cover is provided with a central hole for the crankshaft to pass through, is connected to the upper bearing and forms an oil storage cavity by being surrounded with the upper bearing; the upper end of the shaft hole is communicated with the oil storage cavity, and the two ends of the oil return hole are respectively communicated with the shaft hole and the oil storage cavity.
The pump body assembly provided by the embodiment of the invention at least has the following beneficial effects:
connect in the upper bearing through setting up the end cover, the end cover encloses with the upper bearing and closes and form the oil storage chamber, the upper end and the oil storage chamber intercommunication in the shaft hole of upper bearing, the oil storage chamber is collected the lubricating oil that upwards flows out in the shaft hole of upper bearing, and the upper bearing is equipped with the oil gallery that communicates oil storage chamber and shaft hole, the oil gallery flows back the lubricating oil that the oil storage chamber was collected to the shaft hole, form the oil circuit circulation, make between upper bearing and the bent axle fuel feeding sufficient, form effectual oil film, reduce the wearing and tearing of bent axle and upper bearing, improve the reliability of pump body subassembly operation.
According to some embodiments of the invention, the end cap includes an end plate portion disposed at a distance from an upper end of the upper bearing; the bent axle is equipped with central oilhole and oil outlet, the oil outlet is located the upper bearing with between the end plate portion, the both ends of oil outlet communicate respectively the central oilhole with the oil storage chamber.
According to some embodiments of the invention, the inner wall of the shaft hole is provided with an oil groove, and the upper end of the oil groove is communicated with the oil storage cavity.
According to some embodiments of the invention, at least part of the oil return hole is provided in the oil sump.
According to some embodiments of the present invention, the journal of the upper bearing includes a first journal section and a second journal section, an outer diameter of the first journal section is smaller than an outer diameter of the second journal section, the first journal section is connected to an upper end of the second journal section, the first journal section, the second journal section and the end cap form an oil storage chamber, and the oil return hole is formed in the first journal section.
According to some embodiments of the invention, the end cap includes an end plate portion and a ring portion disposed around a periphery of the end plate portion, the end plate portion is disposed at a distance from the first journal segment in an axial direction of the upper bearing, and the ring portion is fixedly connected to the second journal segment.
According to some embodiments of the invention, the annular portion surrounds the second journal segment, and the annular portion and the second journal segment are in interference fit.
According to some embodiments of the invention, a fitting length of the collar portion to the second journal segment in an axial direction of the upper bearing is greater than or equal to 2mm.
According to some embodiments of the present invention, the journal of the upper bearing is formed with a sink groove having an upward opening, the sink groove and the end cover form the oil storage chamber, and the oil return hole is disposed in a first annular wall of the sink groove on a side facing the shaft hole.
According to some embodiments of the invention, the end cover comprises an end plate part and a ring part arranged around the periphery of the end plate part, the first ring wall is lower than a second ring wall on one side of the sinking groove, which faces away from the shaft hole, in the axial direction of the upper bearing, and the upper end part of the second ring wall is abutted with the end plate part.
According to some embodiments of the invention, the end cover includes an end plate portion and a ring portion disposed around a periphery of the end plate portion, the end plate portion is disposed at a distance from the first ring wall, and the ring portion abuts against a second ring wall on a side of the sinking groove facing away from the shaft hole.
According to some embodiments of the invention, the oil return hole is provided in plurality, and the plurality of oil return holes are arranged at intervals along the circumferential direction of the upper bearing.
According to some embodiments of the invention, the central hole has a hole diameter D 1 And the outer diameter of the crankshaft is D, and the following requirements are met: d is not less than 0.1mm 1 -D≤0.8mm。
The compressor according to the second aspect embodiment of the invention comprises the pump body assembly described in the above embodiments.
The compressor provided by the embodiment of the invention has at least the following beneficial effects:
adopt the pump body subassembly of the first aspect embodiment, pump body subassembly is connected in the upper bearing through setting up the end cover, the end cover encloses with the upper bearing and closes formation oil storage chamber, the upper end and the oil storage chamber intercommunication in the shaft hole of upper bearing, the oil storage chamber is collected the lubricating oil that upwards flows out in the shaft hole of upper bearing, and the upper bearing is equipped with the oil gallery that communicates oil storage chamber and shaft hole, the oil gallery flows back the lubricating oil that the oil storage chamber was collected to the shaft hole, form the oil circuit circulation, make the oil feeding sufficient between upper bearing and the bent axle, form effectual oil film, reduce the wearing and tearing of bent axle and upper bearing, improve the reliability of compressor operation.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The invention is further described with reference to the following figures and examples, in which:
FIG. 1 is a schematic structural diagram of a compressor according to an embodiment of the present invention;
FIG. 2 is a schematic structural view of a pump body assembly according to an embodiment of the present invention;
FIG. 3 is an enlarged view at A in FIG. 2;
FIG. 4 is a cross-sectional view of section B-B of FIG. 3;
FIG. 5 is a schematic view of the upper bearing of FIG. 2;
FIG. 6 is a schematic structural view of a pump body assembly according to another embodiment of the present invention;
FIG. 7 is a schematic structural view of the upper bearing of FIG. 6;
FIG. 8 is an enlarged view at C of FIG. 6;
fig. 9 is a cross-sectional view of section D-D in fig. 8.
Reference numerals:
a compressor 1000;
a housing 100; an exhaust pipe 110;
a motor assembly 200; a rotor 210; a stator 220;
a pump body assembly 300; a cylinder 310; an upper bearing 320; a shaft hole 321; an oil groove 3211; an oil return hole 322; a journal 323; a first journal segment 3231; a second journal segment 3232; a flange 324; a sink 325; a first annular wall 326; a second ring wall 327; a fabrication aperture 3271; a lower bearing 330; a crankshaft 340; an eccentric portion 341; a central oil bore 342; an oil outlet 343; a main shaft 344; a piston 350;
an end cap 400; a central aperture 410; an end plate part 420; an annular portion 430;
the reservoir chamber 500.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, it should be understood that the orientation or positional relationship referred to, for example, the upper, lower, etc., is indicated based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, but does not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.
In the description of the present invention, a plurality means two or more. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present invention, unless otherwise specifically limited, terms such as set, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention by combining the specific contents of the technical solutions.
Referring to fig. 1, a compressor 1000 according to an embodiment of the present invention is used in a refrigeration system or a heat pump system, such as an air conditioner, an air energy water heater, and other household appliances. For example, in a refrigeration system cycle of an air conditioner, the compressor 1000 serves as a power component of a refrigerant cycle, the compressor 1000 compresses a low-temperature and low-pressure gaseous refrigerant to form a high-temperature and high-pressure gaseous refrigerant, and the gaseous refrigerant passes through the condenser to release heat, the throttling device to reduce pressure, the evaporator to absorb heat, and then the gaseous refrigerant enters the compressor 1000 again to perform the next refrigerant cycle.
Referring to fig. 1, a compressor 1000 according to an embodiment of the present invention is a rotary compressor. The compressor 1000 according to the embodiment of the present invention includes a housing 100, a motor assembly 200, and a pump body assembly 300. The motor assembly 200 and the pump body assembly 300 are installed inside the housing 100. It is understood that the motor assembly 200 includes a rotor 210 and a stator 220, and the stator 220 is fixed to an inner wall of the casing 100. The pump body assembly 300 includes a cylinder 310, an upper bearing 320, a lower bearing 330, and a crankshaft 340; the cylinder 310 is formed with a compression chamber (not shown), the upper bearing 320 and the lower bearing 330 are respectively connected to both ends of the cylinder 310 in the up-down direction, thereby closing the upper and lower ends of the compression chamber, the crankshaft 340 is supported by the upper bearing 320 and the lower bearing 330, the eccentric portion 341 of the crankshaft 340 is located in the compression chamber, and the eccentric portion 341 is fitted with the piston 350. The rotor 210 is fixed to the crankshaft 340, such that the crankshaft 340 is driven by the motor assembly 200 to rotate, the crankshaft 340 is stably rotated under the supporting effect of the upper bearing 320 and the lower bearing 330, the eccentric portion 341 of the crankshaft 340 drives the piston 350 to perform eccentric rotation motion relative to the center of the cylinder 310, such that the compression cavity generates periodic variation, the pump assembly 300 completes the processes of air suction, compression, and exhaust, and the compressed gaseous refrigerant re-enters the refrigeration system through the exhaust pipe 110 at the top of the casing 100 to circulate.
When the motor assembly 200 drives the crankshaft 340 to rotate, the crankshaft 340 is bent and deformed under the action of magnetic pulling force, gas force and the like of the motor, and metal contact friction is easily generated between the crankshaft 340 and the upper bearing 320, so that the crankshaft 340 and the upper bearing 320 are abnormally abraded. Especially, in the rotary compressor 1000, when it is started or during a high-load operation, the lubricant may flow out from the shaft hole 321 of the upper bearing 320, so that the oil supply to the upper end and the root of the upper bearing 320 is insufficient, and the dry friction between the crankshaft 340 and the upper bearing 320 occurs, thereby increasing the degree of wear of the crankshaft 340 and the upper bearing 320. Further, the lubricating oil flows out from the shaft hole 321 of the upper bearing 320 due to disturbance of the weight (not shown) of the rotor 210 and the influence of the exhaust air flow, and then the lubricating oil is scattered and remains in the motor unit 200 along with the flow of the refrigerant, so that the oil is accumulated in the motor unit 200, and the lubricating oil is discharged out of the compressor 1000 along with the refrigerant, thereby deteriorating the oil discharge amount of the compressor 1000.
Referring to fig. 2 and 3, in order to solve the problem of insufficient oil film thickness between the upper bearing 320 and the crankshaft 340, the pump body assembly 300 according to an embodiment of the present invention further includes an end cap 400, the end cap 400 is provided with a central hole 410 for the crankshaft 340 to pass through, the end cap 400 is connected to the upper bearing 320, and the end cap 400 and the upper bearing 320 enclose to form an oil storage chamber 500. The upper bearing 320 has a shaft hole 321, and the crankshaft 340 is rotatably provided in the shaft hole 321 of the upper bearing 320. The upper end of the shaft hole 321 is communicated with the oil storage chamber 500, and in the rotation process of the crankshaft 340, the lubricating oil is conveyed upwards in the gap between the crankshaft 340 and the shaft hole 321, and the lubricating oil flowing out upwards from the shaft hole 321 is collected by the oil storage chamber 500.
Referring to fig. 3 and 4, it can be understood that the upper bearing 320 is further provided with an oil return hole 322, the oil return hole 322 is located below the upper end surface of the upper bearing 320, two ends of the oil return hole 322 are respectively communicated with the oil storage cavity 500 and the shaft hole 321, the oil return hole 322 returns the lubricating oil collected by the oil storage cavity 500 to the shaft hole 321 to form oil circulation, so that sufficient oil is supplied between the upper bearing 320 and the crankshaft 340 to form an effective oil film, the oil film bearing capacity is enhanced, the wear of the crankshaft 340 and the upper bearing 320 is reduced, and the reliability of the operation of the compressor 1000 is improved.
Referring to fig. 4 and 5, it can be understood that the inner wall of the shaft hole 321 is provided with an oil groove 3211 for guiding the lubricating oil to flow upward along the shaft hole 321. The oil groove 3211 may be formed as an upward extending spiral groove, which is advantageous for the upward transportation of the lubricating oil under the rotating force of the crankshaft 340, thereby forming an oil circulation, and ensuring that sufficient lubricating oil can be filled between the crankshaft 340 and the shaft hole 321. One end of the oil return hole 322, which is far from the oil storage cavity 500, is disposed in the oil groove 3211, and it can be understood that a partial structure of the oil return hole 322 is located in the oil groove 3211, or all structures of the oil return hole 322 are located in the oil groove 3211, so that after the lubricating oil of the oil storage cavity 500 can flow into the shaft hole 321, the lubricating oil can be guided upwards under the effect of the oil groove 3211, thereby ensuring the thickness of the oil film between the upper bearing 320 and the crankshaft 340, forming an effective oil film, enhancing the bearing capacity of the oil film, reducing the wear of the crankshaft 340 and the upper bearing 320, and improving the reliability of the operation of the compressor 1000.
Referring to fig. 2 and 3, in the pump body assembly 300 according to the embodiment of the present invention, the crankshaft 340 may further include an oil outlet 343. The oil outlet hole 343 is exposed on the outer wall of the crankshaft 340, and the oil outlet hole 343 communicates the central oil hole 342 of the crankshaft 340 with the outer wall of the crankshaft 340. The end cap 400 includes an end plate portion 420 and a ring portion 430, and the ring portion 430 is fixedly coupled to the upper bearing 320, thereby achieving a stable coupling of the end cap 400. The end plate part 420 is spaced from the upper end of the upper bearing 320, the oil outlet hole 343 is located between the upper bearing 320 and the end plate part 420, and the upper ends of the oil outlet hole 343 and the shaft hole 321 are both communicated with the oil storage chamber 500. It can be understood that the number of the oil outlet holes 343 may be one or more, and when the oil outlet holes 343 are provided in plural, the plural oil outlet holes 343 may be uniformly distributed along the circumferential direction of the crankshaft 340, and the specific number of the oil outlet holes 343 needs to be designed according to the parameters of the actual product, and is not limited in detail herein. Therefore, during the rotation of the crankshaft 340, the lubricating oil in the oil sump in the housing 100 is transferred upward through the central oil hole 342 and flows out through the oil outlet hole 343, and the oil storage chamber 500 collects the lubricating oil flowing out of the oil outlet hole 343 and the lubricating oil flowing out upward from the shaft hole 321 of the upper bearing 320, thereby increasing the amount of return of the lubricating oil.
Referring to fig. 3 and 4, it can be understood that the oil return hole 322 is located below the oil outlet hole 343, two ends of the oil return hole 322 are respectively communicated with the oil storage cavity 500 and the shaft hole 321, the oil return hole 322 returns the lubricating oil collected by the oil storage cavity 500 to the shaft hole 321 to form an oil circuit circulation, so that sufficient oil is supplied between the upper bearing 320 and the crankshaft 340, an effective oil film is formed, the bearing capacity of the oil film is enhanced, the wear of the crankshaft 340 and the upper bearing 320 is reduced, and the reliability of the operation of the compressor 1000 is improved.
It should be noted that, since crankshaft 340 is subjected to bending deformation by a magnetic pulling force of a motor, a gas force, or the like, an amount of wear of crankshaft 340 at the upper end portion and the root portion of upper bearing 320 is maximized. According to the invention, the oil circuit circulation is formed at the upper end part of the upper bearing 320, so that the oil film at the upper end part of the upper bearing 320 is thickened, and meanwhile, because the upper end of the shaft hole 321 of the upper bearing 320 forms passive oil pressure, the collected lubricating oil can downwards flow to the root part of the upper bearing 320 through the shaft hole 321 under the action of the passive oil pressure and gravity, so that the oil film at the root part of the upper bearing 320 is thickened; thereby, the effect of reducing the abrasion between the crankshaft 340 and the upper bearing 320 is achieved, the service life of the compressor 1000 is prolonged, and the reliability of the operation of the compressor 1000 is improved.
It can be understood that the end cap 400 can block and collect the lubricating oil flowing out of the oil outlet 343 and the lubricating oil flowing out of the shaft hole 321, so that the lubricating oil cannot be directly discharged upwards to the motor assembly 200, the oil output of the compressor 1000 is reduced, and the oil accumulation problem of the motor assembly 200 can be effectively avoided.
Referring to fig. 2 and 5, in the pump body assembly 300 according to an embodiment of the present invention, the upper bearing 320 includes a journal 323 and a flange 324, the journal 323 is connected to an upper end of the flange 324, and the journal 323 is integrally formed with the flange 324. The flange 324 may be fixedly coupled to the cylinder 310 by bolts. Referring to fig. 3 and 4, the journal 323 includes a first journal section 3231 and a second journal section 3232, the first journal section 3231 is connected to an upper end of the second journal section 3232, an outer diameter of the first journal section 3231 is smaller than an outer diameter of the second journal section 3232, an oil return hole 322 is provided in the first journal section 3231, two ends of the oil return hole 322 respectively communicate with outer walls of the axle hole 321 and the first journal section 3231, and an end cap 400 is fixedly connected to the second journal section 3232 or another position of the journal 323. Reservoir chamber 500 is formed between first journal section 3231, second journal section 3232 and end cap 400, and reservoir chamber 500 is an annular space extending in the circumferential direction of first journal section 3231, thereby increasing the volume of reservoir chamber 500.
In the embodiment of the invention, the lubricating oil in the oil outlet 343 flows into the oil storage cavity 500 between the first journal section 3231 and the end cover 400, and the lubricating oil collected in the oil storage cavity 500 flows back to the shaft hole 321 through the oil return hole 322 to form oil circuit circulation, so that sufficient oil is supplied between the upper bearing 320 and the crankshaft 340, an effective oil film is formed, the abrasion of the crankshaft 340 and the upper bearing 320 is reduced, and the operation reliability of the pump body assembly 300 is improved. In addition, the upper bearing 320 of the embodiment of the invention has the advantages of more convenient processing, simpler structure and less assembly difficulty.
It can be understood that the number of the oil return holes 322 may be one or more, when the number of the oil return holes 322 is multiple, the multiple oil return holes 322 are uniformly distributed along the circumference of the first journal section 3231, and the specific number of the oil return holes 322 needs to be designed according to the parameters of the actual product, and is not limited herein.
Referring to fig. 3, it can be appreciated that the end cap 400 includes an end plate portion 420 and an annular portion 430, the annular portion 430 being disposed around a periphery of the end plate portion 420. Along the axial direction of the upper bearing 320, i.e. the up-down direction in fig. 3, the end plate portion 420 and the first journal section 3231 are arranged at an interval, and the oil outlet 343 is located between the first journal section 3231 and the end plate portion 420, i.e. the oil outlet 343 is located below the end plate portion 420 and above the upper bearing 320, which is beneficial to improving the outflow amount of the lubricating oil of the oil outlet 343. The annular portion 430 is fixedly connected to the second journal section 3232, for example, by welding, interference connection, thread connection, and adhesive connection, so that the end cap 400 is more stably and reliably mounted, and the end cap 400 is ensured not to loosen and fall off.
It can be understood that the oil return hole 322 is provided at the connection portion of the first journal section 3231 and the second journal section 3232, that is, at the bottom of the oil storage chamber 500, so that the lubricating oil in the oil storage chamber 500 can flow back into the shaft hole 321 to the maximum extent under the action of gravity, thereby ensuring the oil film thickness between the crankshaft 340 and the upper bearing 320 and reducing the wear amount between the crankshaft 340 and the upper bearing 320.
Referring to fig. 3, it can be understood that the annular portion 430 surrounds the second journal section 3232, and the annular portion 430 and the second journal section 3232 are in interference fit, so that the end cap 400 is assembled more conveniently and stably, the assembly efficiency is improved, the sealing performance of the oil storage cavity 500 is ensured, and the oil leakage at the joint of the end cap 400 and the second journal section 3232 is avoided.
Referring to fig. 3, it can be understood that, in the up-down direction, the matching length of the annular portion 430 and the second journal section 3232 is L1, and L1 is greater than or equal to 2mm, so as to ensure the reliability of the connection between the end cap 400 and the upper bearing 320, further ensure the sealing performance of the oil storage chamber 500, and avoid the occurrence of oil leakage at the connection between the end cap 400 and the second journal section 3232.
Referring to fig. 3, it can be understood that the end cap 400 is a one-piece molded member, i.e., the end plate portion 420 and the ring portion 430 are integrally molded. The end cap 400 may be made of hot rolled pickled steel, aluminum or plastic, and may be made by turning, stamping, die casting, or injection molding. The specific materials and processes are designed according to the parameters of the actual product.
Referring to fig. 4, it can be understood that a plurality of oil return holes 322 are provided, and the plurality of oil return holes 322 are circumferentially spaced, for example, uniformly distributed, along the first journal section 3231, so as to facilitate uniform oil return from the oil storage cavity 500 into the shaft hole 321, so that the thickness of an oil film formed between the crankshaft 340 and the shaft hole 321 is more uniform, and further, the operation stability of the crankshaft 340 is improved. The oil storage cavity 500 is an annular space arranged along the circumferential direction of the first journal section 3231, so that the lubricating oil flowing into the oil storage cavity 500 from the oil outlet 343 can be uniformly distributed to each oil return hole 322 in the oil storage cavity 500, the lubricating oil is more uniformly distributed when flowing back to the shaft hole 321, the condition that the thickness of a local oil film of the shaft hole 321 is insufficient is avoided, local abnormal wear between the crankshaft 340 and the upper bearing 320 is avoided, and the running reliability of the compressor 1000 is improved.
Referring to fig. 3, it will be appreciated that the central bore 410 is defined by a bore diameter D 1 A main shaft 344 of the crankshaft 340 is inserted into the central hole410, main shaft 344 has an outer diameter D that satisfies: d is not more than 0.1mm 1 D is less than or equal to 0.8mm. Therefore, the gap between the main shaft 344 of the crankshaft 340 and the central hole 410 is ensured to be between 0.05mm and 0.4mm, interference and friction between the crankshaft 340 and the end cover 400 can be avoided, meanwhile, the condition that lubricating oil overflows from the oil storage cavity 500 from the gap between the crankshaft 340 and the end cover is effectively reduced, and sufficient oil supply between the crankshaft 340 and the upper bearing 320 is ensured.
Referring to fig. 6 and 7, in order to solve the problem of insufficient oil film thickness between the upper bearing 320 and the crankshaft 340, the pump body assembly 300 according to another embodiment of the present invention has a structure similar to that of the previous embodiment, except for the structure of the oil reservoir 500 formed by the upper bearing 320 and the end cap 400.
Referring to fig. 6 and 7, in the pump block assembly 300 according to another embodiment of the present invention, the journal 323 of the upper bearing 320 is formed with a sink 325, the sink 325 is formed by recessing the upper end surface of the journal 323 downward, the sink 325 opens upward, and the sink 325 and the end cap 400 form the oil reservoir 500. The sink 325 may be formed in a ring structure to increase the volume of the reservoir chamber 500. The sink 325 includes a first annular wall 326 and a second annular wall 327, the second annular wall 327 having an outer diameter greater than the outer diameter of the first annular wall 326. The first annular wall 326 is a side wall of the sinking groove 325 facing the axle hole 321, the second annular wall 327 is a side wall of the sinking groove 325 facing away from the axle hole 321, the first annular wall 326 and the second annular wall 327 are annular, and the oil return hole 322 is disposed in the first annular wall 326 and used for communicating the sinking groove 325 and the axle hole 321.
In the embodiment of the invention, the lubricating oil in the oil outlet 343 flows into the oil storage cavity 500 formed by the sink 325 and the end cover 400, and the lubricating oil collected in the oil storage cavity 500 flows back to the shaft hole 321 through the oil return hole 322 to form oil circulation, so that sufficient oil is supplied between the upper bearing 320 and the crankshaft 340, an effective oil film is formed, the abrasion of the crankshaft 340 and the upper bearing 320 is reduced, and the operation reliability of the pump body assembly 300 is improved.
It is understood that the first annular wall 326 and the second annular wall 327 may be disposed at equal heights, and the end cap 400 is disposed at a distance from the first annular wall 326 and the second annular wall 327; the first annular wall 326 and the second annular wall 327 may be arranged at different heights, and the first annular wall 326 is lower than the second annular wall 327. End cap 400 may be secured to second ring wall 327.
Referring to fig. 8, it can be understood that the end cap 400 includes an end plate portion 420 and a ring portion 430, and the ring portion 430 is disposed around the periphery of the end plate portion 420. Along the axial direction of the upper bearing 320, that is, in the up-down direction of fig. 8, the first annular wall 326 is lower than the second annular wall 327, the upper end portion of the second annular wall 327 abuts against the end plate portion 420, and the oil outlet hole 343 is located between the first annular wall 326 and the end plate portion 420, which is beneficial to the installation and positioning of the end cover 400 and the upper bearing 320, and improves the assembly accuracy. Further, the end cap 400 can close the oil reservoir chamber 500 by the abutting engagement of the end plate portion 420 and the second annular wall 327, and has a better sealing property.
As another embodiment, the end cap 400 may further close the oil chamber 500 by abutting the annular portion 430 against the second annular wall 327, so that the oil chamber 500 has better sealing performance. It is understood that the ring portion 430 can be fixedly connected to the inner wall of the second annular wall 327 or fixedly connected to the outer wall of the second annular wall 327. The annular portion 430 and the second annular wall 327 may be welded, connected by interference, screwed, or glued, so that the end cover 400 is more stably and reliably mounted, and the end cover 400 is prevented from loosening and falling off.
Referring to fig. 8 and 9, it can be understood that since the oil return hole 322 is opened in the first annular wall 326, in order to facilitate the machining of the oil return hole 322, a process hole 3271 needs to be provided in a position of the second annular wall 327 corresponding to the oil return hole 322. Therefore, when the end cap 400 is fixed, the annular portion 430 covers the through hole 3271, so that oil leakage from the oil storage chamber 500 through the through hole 3271 is avoided. In the up-down direction, the height of the second annular wall 327 is defined as L2, and the height of the annular portion 430 is defined as L3, which satisfies: l3 > L2. Thereby, the sealability of the oil reservoir chamber 500 can be ensured and the assembly of the end cap 400 is simpler.
Referring to fig. 8, it can be understood that the oil return hole 322 is formed at the bottom of the first annular wall 326, so that the lubricating oil in the oil storage chamber 500 can flow back into the shaft hole 321 to the maximum extent under the action of gravity, thereby ensuring the thickness of the oil film between the crankshaft 340 and the upper bearing 320 and reducing the amount of wear between the crankshaft 340 and the upper bearing 320.
Referring to fig. 1, a compressor 1000 according to an embodiment of the present invention includes the pump body assembly 300 according to the above embodiment. The compressor 1000 according to the embodiment of the present invention adopts the pump body assembly 300 according to the first aspect embodiment, the pump body assembly 300 is connected to the upper bearing 320 by the end cap 400, the end cap 400 and the upper bearing 320 enclose to form the oil storage chamber 500, the upper end of the shaft hole 321 of the upper bearing 320 is communicated with the oil storage chamber 500, the oil storage chamber 500 collects the lubricating oil flowing upwards from the shaft hole 321 of the upper bearing 320, the upper bearing 320 is provided with the oil return hole 322 communicating the oil storage chamber 500 and the shaft hole 321, the oil return hole 322 returns the lubricating oil collected by the oil storage chamber 500 to the shaft hole 321 to form oil circulation, so that sufficient oil is supplied between the upper bearing 320 and the crankshaft 340 to form an effective oil film, the abrasion of the crankshaft 340 and the upper bearing 320 is reduced, and the operation reliability of the compressor 1000 is improved.
Referring to table 1, a comparison table of the measured effects of the compressor 1000 according to the embodiment of the present invention and the compressor according to the prior art under the same operating condition is shown. As can be seen from the data in the table, compared with the compressor 1000 in the existing scheme, the cold quantity of the compressor 1000 in the embodiment of the present invention is increased by about 0.46% under the same working condition, that is, the compression capacity of the compressor 1000 is improved; the input force is reduced by about 0.8%, namely the power of the compressor 1000 is reduced, and the power consumption is also reduced; the energy efficiency level (COP) is improved by about 1.28 percent, namely the energy efficiency of the compressor 1000 is obviously improved; the current is related to the input force, and the current is reduced by about 1%, i.e., the power of the compressor 1000 is reduced.
Table 1: effect comparison table of compressor of existing scheme and compressor 1000 of this embodiment under same working condition
| Scheme(s) | Cold quantity (W) | Income force (W) | COP(％) | Current (A) |
| Existing solutions ( |
2380.0 | 574.3 | 414.4 | 4.98 |
| The embodiment scheme (adding |
2391.0 | 569.7 | 419.7 | 4.93 |
| Effect | 0.46％ | -0.8％ | 1.28％ | -1％ |
Therefore, as can be clearly seen from the data in table 1, compared with the compressor 1000 according to the prior art, the compressor 1000 according to the embodiment of the present invention can not only reduce the wear between the crankshaft 340 and the upper bearing 320, prolong the service life of the pump body assembly 300, and improve the reliability of the operation of the compressor 1000, but also improve the performance of the compressor 1000 and improve the energy efficiency of the compressor 1000.
Since the compressor 1000 adopts all technical solutions of the pump body assembly 300 of the above embodiments, at least all beneficial effects brought by the technical solutions of the above embodiments are achieved, and no further description is provided herein.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.
Claims (14)
1. Pump body subassembly, its characterized in that includes:
the upper bearing is provided with a shaft hole and an oil return hole;
the crankshaft is rotatably arranged in the shaft hole;
the end cover is provided with a central hole for the crankshaft to pass through, is connected to the upper bearing and forms an oil storage cavity by being surrounded with the upper bearing;
the upper end of the shaft hole is communicated with the oil storage cavity, and the two ends of the oil return hole are respectively communicated with the shaft hole and the oil storage cavity.
2. The pump body assembly of claim 1, wherein: the end cover comprises an end plate part, and the end plate part and the upper end of the upper bearing are arranged at intervals; the bent axle is equipped with central oilhole and oil outlet, the oil outlet is located the upper bearing with between the end plate portion, the both ends of oil outlet communicate respectively the central oilhole with the oil storage chamber.
3. The pump body assembly according to claim 1 or 2, wherein: the inner wall in shaft hole is equipped with the oil groove, the upper end of oil groove with the oil storage chamber intercommunication.
4. The pump body assembly of claim 3, wherein: at least part of the oil return hole is arranged in the oil groove.
5. The pump body assembly of claim 1, wherein: go up the journal of bearing and include first journal section and second journal section, the external diameter of first journal section is less than the external diameter of second journal section, first journal section connect in the upper end of second journal section, first journal section second journal section with the end cover forms the oil storage chamber, the oil gallery is located first journal section.
6. The pump body assembly of claim 5, wherein: the end cover comprises an end plate portion and an annular portion surrounding the periphery of the end plate portion, the end plate portion and the first journal segment are arranged at intervals in the axial direction of the upper bearing, and the annular portion is fixedly connected with the second journal segment.
7. The pump body assembly of claim 6, wherein: the annular part encloses to be located the second journal section, the annular part with the second journal section is interference fit.
8. The pump body assembly of claim 7, wherein: the matching length of the annular part and the second journal segment along the axial direction of the upper bearing is larger than or equal to 2mm.
9. The pump body assembly of claim 1, wherein: the shaft neck of the upper bearing is provided with a sinking groove with an upward opening, the sinking groove and the end cover form the oil storage cavity, and the oil return hole is formed in a first annular wall of one side, facing the shaft hole, of the sinking groove.
10. The pump body assembly of claim 9, wherein: the end cover comprises an end plate part and an annular part surrounding the periphery of the end plate part, the first annular wall is lower than a second annular wall on one side, away from the shaft hole, of the sinking groove in the axial direction of the upper bearing, and the upper end part of the second annular wall is abutted to the end plate part.
11. The pump body assembly of claim 9, wherein: the end cover comprises an end plate portion and an annular portion surrounding the periphery of the end plate portion, the end plate portion is arranged at an interval with the first annular wall, and the annular portion is abutted to the second annular wall on one side of the shaft hole, away from the sinking groove.
12. The pump body assembly of claim 1, wherein: the oil return holes are arranged in a plurality of modes, and the oil return holes are arranged along the circumferential direction of the upper bearing at intervals.
13. The pump body assembly of claim 1, wherein: the aperture of the central hole is D 1 And the outer diameter of the crankshaft is D, and the following requirements are met: d is not more than 0.1mm 1 -D≤0.8mm。
14. A compressor, characterized by: comprising a pump body assembly according to any one of claims 1 to 13.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211521173.9A CN115750368A (en) | 2022-11-30 | 2022-11-30 | Pump body subassembly and compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211521173.9A CN115750368A (en) | 2022-11-30 | 2022-11-30 | Pump body subassembly and compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115750368A true CN115750368A (en) | 2023-03-07 |
Family
ID=85341270
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211521173.9A Pending CN115750368A (en) | 2022-11-30 | 2022-11-30 | Pump body subassembly and compressor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115750368A (en) |
-
2022
- 2022-11-30 CN CN202211521173.9A patent/CN115750368A/en active Pending
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