CN113944651A - Shaft structure, compressor and air conditioner - Google Patents

Shaft structure, compressor and air conditioner Download PDF

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Publication number
CN113944651A
CN113944651A CN202111313064.3A CN202111313064A CN113944651A CN 113944651 A CN113944651 A CN 113944651A CN 202111313064 A CN202111313064 A CN 202111313064A CN 113944651 A CN113944651 A CN 113944651A
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CN
China
Prior art keywords
shaft
axle
section
lightening hole
structure according
Prior art date
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Pending
Application number
CN202111313064.3A
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Chinese (zh)
Inventor
胡铁
钟瑞兴
蒋楠
伍涛
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Gree Electric Appliances Inc of Zhuhai
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Gree Electric Appliances Inc of Zhuhai
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
Application filed by Gree Electric Appliances Inc of Zhuhai filed Critical Gree Electric Appliances Inc of Zhuhai
Priority to CN202111313064.3A priority Critical patent/CN113944651A/en
Publication of CN113944651A publication Critical patent/CN113944651A/en
Pending legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/05—Shafts or bearings, or assemblies thereof, specially adapted for elastic fluid pumps
    • F04D29/053—Shafts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/02—Selection of particular materials
    • F04D29/023—Selection of particular materials especially adapted for elastic fluid pumps
    • 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
    • F16C3/02—Shafts; Axles
    • F16C3/023—Shafts; Axles made of several parts, e.g. by welding
    • 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
    • F16C2204/00—Metallic materials; Alloys
    • F16C2204/60—Ferrous alloys, e.g. steel alloys
    • 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
    • F16C2208/00—Plastics; Synthetic resins, e.g. rubbers
    • 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
    • F16C2226/00—Joining parts; Fastening; Assembling or mounting parts
    • F16C2226/10—Force connections, e.g. clamping

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

The invention provides a shaft structure, a compressor and an air conditioner, wherein the shaft structure comprises: the front axle, axis and rear axle, the axis is embedded inside the partial shaft section of front axle, and the partial shaft section cover of front axle is established on the partial shaft section periphery of rear axle, and the axial one end of rear axle is connected with the axial one end of axis. The middle shaft is embedded in the front shaft, so that the rigidity and the strength of the shaft structure are improved, and the technical problem that the rigidity and the strength are greatly reduced when the shaft structure is designed into a hollow structure is solved.

Description

Shaft structure, compressor and air conditioner
Technical Field
The invention belongs to the technical field of compressors, and particularly relates to a shaft structure, a compressor and an air conditioner.
Background
In the field of centrifugal compressors, the shaft structure is the most central part of the compressor, once the shaft structure is damaged, the pressure will inevitably affect the normal operation of the compressor, thereby generating immeasurable results, and therefore, in the field of air conditioner design, the stability and reliability of the shaft structure become the central importance of the whole compressor.
In the general refrigeration industry, most shaft structures adopt a single-cantilever connection mode, namely two impellers and part of important parts are all arranged at the front end of the shaft structure, so that the center of gravity is excessively deviated relative to the center of gravity of the shaft structure. And because the rotating speed is too high and is acted by the centrifugal force of the rotating mass, the gas inertia force which changes periodically and the reciprocating inertia force, the whole shaft structure bears the action of bending and twisting load, so that the bending deformation of the shaft structure is caused, and the normal operation of the compressor is influenced. The existing rotating shaft is generally a solid shaft, and has large weight and inertia, so that the mechanical efficiency loss of the motor is large, and the oil consumption of the motor is also large. Therefore, the rotating shaft has enough strength and rigidity, and the surface of the shaft neck needs to be wear-resistant, work uniformly and balance well. In order to reduce the mass of the shaft and the centrifugal forces occurring during the movement, the shaft journals are often hollow. Oil holes are opened on each journal surface to introduce or withdraw oil for lubricating the journal surface. In order to reduce stress concentration, the joints of the main journal and the shaft shoulder are connected by transition arcs.
The weight reduction of part of rotating shafts is mainly considered on one side of a crankshaft connecting rod neck under the common condition of reducing weight, the weight reduction effect can be simultaneously achieved on the condition of meeting the crankshaft balance rate by reducing weight on one side of the crankshaft connecting rod neck, however, the negative influence caused by the weight reduction is large, and as the connecting rod neck adopts concentric circles in the hollow part, the lower side of the connecting rod neck is closer to a dangerous section of the crankshaft crank, so that the rigidity and the strength of the crankshaft are greatly reduced, and therefore, the shaft structure is provided according to the problems.
Disclosure of Invention
Therefore, the invention aims to solve the technical problem that the rigidity and the strength are greatly reduced when the shaft structure is designed into a hollow structure. Thereby providing a shaft structure, compressor and air conditioner.
In order to solve the above problem, the present invention provides a shaft structure, comprising: the front axle, axis and rear axle, the axis is embedded inside the partial shaft section of front axle, and the partial shaft section cover of front axle is established on the partial shaft section periphery of rear axle, and the axial one end of rear axle is connected with the axial one end of axis.
In some embodiments, the front axle has an axial length that is three times an axial length of the rear axle, the central axle has an axial length that is two-fifths of a sum of the axial length of the front axle and the axial length of the rear axle, the front axle is made of a composite material, the central axle is made of a steel material, and the rear axle is made of a high molecular polymer.
In some embodiments, the front axle and the middle axle are fixedly mounted in an interference fit manner, and the front axle and the rear axle are fixedly mounted in an interference fit manner.
In some embodiments, the front axle, the central axle, and the rear axle are coaxially disposed.
In some embodiments, the front axle comprises a first axle section, a second axle section and a third axle section which are arranged in sequence and have successively increased outer diameters, and the outer diameter of the first axle section is D5The second shaft section has an outer diameter D3The middle shaft is embedded in the third shaft section, and one end of the third shaft section, which is far away from the second shaft section, is sleeved on the rear shaft.
In some embodiments, the front axle further comprises a first screw hole, a first lightening hole and a second lightening hole which are arranged inside the front axle in sequence and have successively increased diameters, wherein the inner diameter of the first screw hole is D6The inner diameter of the first lightening hole is D4The inner diameter of the second lightening hole is D2And the middle shaft is embedded in the front shaft and is positioned on one side of the second lightening hole away from the first lightening hole.
In some embodiments, the end of the first shaft section is provided with a locking nut hole, the bottom of the locking nut hole being at an axial distance of more than 10mm from the bottom of the first screw hole, and D6/D5＝K5，K5The value is within 0.45-0.51.
In some embodiments, the second shaft segment has an axial length L3The axial distance of the first lightening hole is L4The axial distance of the second lightening hole is L2The axial distance between one end of the third shaft section close to the second shaft section and the middle shaft is L1。
In some embodiments, L4/L3＝K3，K3Has a value within 0.65-0.68, and D4/D3＝K4，K4The value is within 0.55-0.58.
In some embodiments, the third shaft section has two spaced impeller mounts on an outer circumference thereof adjacent the second shaft section.
In some embodiments, the impeller mount and the third shaft section each employ a triangular prism configuration.
In some embodiments, the triangular prism structure has a cross-section consisting of at least three segments R1Circular arc and three segments R2Arc composition, R1Arc and R2The circular arcs are arranged at intervals, and the inscribed circle of the section of the triangular prism structure is separated from the R1The maximum distance of the arc is 2 e.
In some embodiments, R1/R2K ranges from 1.05 to 1.07.
In some embodiments, the impeller mount has an outer diameter D1。
In some embodiments, L2/L1＝K1，K1Has a value within 0.9-0.92, and D2/D1＝K2，K2The value is within 0.51-0.52.
In some embodiments, the third shaft segment is axially provided with a plurality of jackscrew holes proximate to the end face of the second shaft segment.
In some embodiments, the outer diameter of the bottom bracket axle is D7A third lightening hole is axially arranged in the middle shaft, and the inner diameter of the third lightening hole is D8。
In some embodiments, D8/D7＝K6，K6The value is within 0.62-0.66.
In some embodiments, the rear axle includes a fourth axle section and a fifth axle section that are axially connected end to end, the third axle section is sleeved on the fourth axle section, and the fifth axle section adopts a triangular prism structure.
In some embodiments, the rear axle further comprises a fourth lightening hole, a fifth lightening hole and a second screw hole which are axially arranged in sequence, wherein the second screw hole is arranged at one end far away from the middle axle.
In some embodiments, the fourth shaft segment has an outer diameter D7The outer diameter of the fifth shaft section is D9The inner diameter of the fourth lightening hole is D8The inner diameter of the fifth lightening hole is D10。
In some embodiments, D10/D9＝K7，K7The value is between 0.64 and 0.66.
In some embodiments, the bottom of the second screw hole is spaced more than 10mm from an end surface of the rear axle distal from the central axis.
In some embodiments, the diameter of the second screw hole is D11，D11/D10＝K8，K8The value is within 0.2-0.5.
In some embodiments, the end surface of the rear axle far away from the middle axle is provided with a plurality of jackscrew holes.
The invention also provides a compressor comprising the shaft structure.
The invention also provides an air conditioner which comprises the compressor.
The shaft structure provided by the invention has the following beneficial effects:
the present invention provides a shaft structure, characterized by comprising: the front axle, axis and rear axle, the axis is embedded inside the partial shaft section of front axle, and the partial shaft section cover of front axle is established on the partial shaft section periphery of rear axle, and the axial one end of rear axle is connected with the axial one end of axis. The middle shaft is embedded in the front shaft, so that the rigidity and the strength of the shaft structure are improved, and the technical problem that the rigidity and the strength are greatly reduced when the shaft structure is designed into a hollow structure is solved.
On the other hand, the air conditioner and the compressor provided by the invention are designed based on the shaft structure, and the beneficial effects of the air conditioner and the compressor are referred to the beneficial effects of the shaft structure, which are not repeated herein.
Drawings
FIG. 1 is a schematic structural view of a shaft structure according to an embodiment of the present invention;
FIG. 2 is a schematic view of the front axle of the axle construction of an embodiment of the present invention;
FIG. 3 is a schematic structural view of a bottom bracket of the axle structure according to the embodiment of the present invention;
FIG. 4 is a schematic structural view of a rear axle of the axle construction of the embodiment of the present invention;
fig. 5 is an axial view of a shaft structure of an embodiment of the present invention.
The reference numerals are represented as:
10. a front axle; 11. a first shaft section; 12. a second shaft section; 13. a third shaft section; 14. a first screw hole; 15. a first lightening hole; 16. a second lightening hole; 18. a nut hole is locked; 19. an impeller mounting portion; 20. a middle shaft; 21. a third lightening hole; 30. a rear axle; 31. a fourth shaft section; 32. a fifth shaft section; 33. a fourth lightening hole; 34. a fifth lightening hole; 35. a second screw hole; 40. and (4) a jackscrew hole.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the specific embodiments of the present invention and the accompanying drawings. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1 to 5, the present invention further provides a method comprising: the front axle 10, the middle axle 20 and the rear axle 30, the middle axle 20 is embedded in the partial axle section of the front axle 10, the partial axle section of the front axle 10 is sleeved on the periphery of the partial axle section of the rear axle 30, and one axial end of the rear axle 30 is connected with one axial end of the middle axle 20.
The middle shaft 20 of this embodiment is axially embedded in the front shaft 10, one end of the front shaft 10 is sleeved on the outer periphery of a part of the shaft section of the rear shaft 30, the end part of the rear shaft 30 is connected with the end part of the front shaft 10, and the middle shaft 20 is embedded in the front shaft 10, so that the rigidity and the strength of the shaft structure of the invention are improved.
In some embodiments, the front axle 10 has an axial length that is three times the axial length of the rear axle 30, the central axle 20 has an axial length that is two-fifths of the sum of the axial length of the front axle 10 and the axial length of the rear axle 30, the front axle 10 is made of a composite material, the central axle 20 is made of a steel material, and the rear axle 30 is made of a high molecular polymer.
In the embodiment, the front shaft 10 is made of a composite material, the density of the composite material is lower than that of a common steel material, the composite material is high in strength, wear-resistant and heat-resistant, on one hand, the mass of a shaft structure can be reduced, and on the other hand, the front shaft is a rotating part for supporting the impeller, so that the rigidity required by impeller support is guaranteed; the middle shaft 20 is made of steel materials, has high density, can enable the gravity center of the shaft structure to fall on a bearing supporting point, can improve better supporting force on the whole shaft structure on one hand, and can enable the shaft structure to obtain better concentricity on the other hand, so that the operation is more stable; the rear axle 30 is mainly made of high molecular polymer with lower density than steel material because the end of the rear axle is only applied by the motor bearing. On one hand, the weight of the whole shaft structure can be reduced, and on the other hand, the bearing is reduced while the rigidity of the shaft structure is improved.
In some embodiments, the front axle 10 and the middle axle 20 are fixedly mounted by interference fit, and the front axle 10 and the rear axle 30 are fixedly mounted by interference fit. A tight connection between the front axle 10, the middle axle 20 and the rear axle 30 is ensured.
In some embodiments, the front axle 10, the central axle 20, and the rear axle 30 are coaxially disposed. The running stability of the front axle 10, the middle axle 20 and the rear axle 30 is ensured.
In some embodiments, the front axle 10 comprises a first axle segment 11, a second axle segment 12 and a third axle segment 13 which are arranged in sequence and have successively larger outer diameters, wherein the outer diameter of the first axle segment 11 is D5The second shaft section 12 has an outer diameter D3The middle shaft 20 is embedded in the third shaft section 13, and an end of the third shaft section 13 away from the second shaft section 12 is sleeved on the rear shaft 30. The front axle 10 adopts a multi-section structure with different diameters, so that unnecessary parts are reduced, and the weight of the axle structure is further reduced.
In some embodiments, the front axle 10 further includes a first screw hole 14, a first lightening hole 15 and a second lightening hole 16 which are arranged inside the front axle in sequence and have successively larger diameters, and the inner diameter of the first screw hole 14 is D6First lightening hole15 inner diameter D4The inner diameter of the second lightening hole 16 is D2The middle axle 20 is embedded in the front axle 10 and is located on the side of the second lightening hole 16 far away from the first lightening hole 15. The weight of the shaft structure is further reduced by providing the first screw hole 14, the first lightening hole 15 and the second lightening hole 16.
In some embodiments, the end of the first shaft section 11 is provided with a locking nut hole 18, the axial distance of the bottom of the locking nut hole 18 from the bottom of the first screw hole 14 is greater than 10mm, the bottom of the locking nut hole 18 does not penetrate to the first screw hole 14, and D6/D5＝K5，K5The value is within 0.45-0.51, when K is5When the shaft structure is within the value range of the embodiment, the weight of the shaft structure is reduced to the maximum extent, and the rigidity and the strength of the shaft structure are ensured.
In some embodiments, the second shaft segment 12 has an axial length L3The axial distance of the first lightening hole is L4The axial distance of the second lightening hole is L2The end of the third shaft section 13 close to the second shaft section 12 is at an axial distance L from the central axis 201。
In some embodiments, L4/L3＝K3，K3Has a value within 0.65-0.68, and D4/D3＝K4，K4The value is within 0.55-0.58, when K is3And K4When the shaft structure is within the value range of the embodiment, the weight of the shaft structure is reduced to the maximum extent, and the rigidity and the strength of the shaft structure are ensured.
In some embodiments, the third shaft section 13 is provided with two impeller mounts 19 spaced apart on the outer circumference of the second shaft section 12.
In some embodiments, the impeller mounting portion 19 and the third shaft section 13 each adopt a triangular prism configuration.
The impeller mounting part 19 and the front shaft 10 both adopt a triangular prism structure, so that stress concentration sources of original key connection or key-free connection are reduced, stress concentration is reduced, and the shaft structure can transmit larger torque.
In some embodiments, the triangular prism structure has a cross-section consisting of at least three segments R1Circular arc and three segments R2Arc composition, R1Arc and R2The circular arcs are arranged at intervals, and the inscribed circle of the section of the triangular prism structure is separated from the R1The maximum distance of the arc is 2 e.
Wherein R is1/R2K ranges from 1.05 to 1.07.
The impeller mounting part 19 adopts a triangular prism structure, and the value of K is in a range of 1.05-1.07, so that on one hand, the assembly and disassembly are convenient, good centering performance between the impeller and the third shaft section 13 is ensured, and the assembly precision of the shaft structure is improved. On the other hand, the machining precision is high, the matching precision between the impeller and the third shaft section 13 is guaranteed, stress concentration sources generated by the fact that the traditional impeller is connected with a key or is not connected with the key are reduced, the third shaft section 13 can improve large torque, and the critical rotating speed is further improved.
In some embodiments, the impeller mounting portion 19 has an outer diameter D1。
In some embodiments, L2/L1＝K1，K1Has a value within 0.9-0.92, and D2/D1＝K2，K2The value is within 0.51-0.52, when K is1And K2When being in this embodiment value range, also guarantee the rigidity and the intensity of axle construction when can the maximize having alleviateed axle construction weight.
In some embodiments, the third shaft section 13 is provided with a plurality of jackscrew holes 40 axially disposed proximate to the end face of the second shaft section 12. The plurality of jackscrew holes 40 are arranged, on one hand, the shaft structure can be conveniently disassembled and assembled, and meanwhile, the purpose of reducing weight can be achieved. On the other hand, a counterweight means can be provided when the shaft structure is balanced dynamically.
In some embodiments, the outer diameter of the bottom bracket 20 is D7A third lightening hole 21 is axially arranged inside the middle shaft 20, and the inner diameter of the third lightening hole 21 is D8The provision of the third lightening hole 21 reduces the weight of the axle construction.
In some embodiments, D8/D7＝K6，K6The value is within 0.62-0.66. When K is6When the axial structure is within the value range of the embodiment, the axial structure is lightened to the maximum degreeThe rigidity and the strength of the shaft structure are ensured while the weight is increased.
In some embodiments, the rear axle 30 includes a fourth axle section 31 and a fifth axle section 32 connected end to end in the axial direction, the third axle section 13 is sleeved on the fourth axle section 31, and the fifth axle section 32 adopts a triangular prism structure. The rear shaft 30 adopts a multi-section structure with different diameters, so that unnecessary parts are reduced, and the weight of the shaft structure is further reduced; the fifth shaft section 32 adopts a triangular prism structure, so that stress concentration sources of original key connection or key-free connection are reduced, stress concentration is reduced, and the shaft structure can transmit larger torque.
In some embodiments, the rear axle 30 further includes a fourth lightening hole 33, a fifth lightening hole 34, and a second screw hole 35 axially disposed therein in that order, the second screw hole 35 being disposed at an end distal from the bottom bracket axle 20, the disposition of the fourth lightening hole 33, the fifth lightening hole 34, and the second screw hole 35 reducing the weight of the axle structure.
In some embodiments, the fourth shaft section 31 has an outer diameter D7The fifth shaft section 32 has an outer diameter D9The fourth lightening hole 33 has an inner diameter D8The fifth lightening hole 34 has an inner diameter D10。
In some embodiments, D10/D9＝K7，K7The value is between 0.64 and 0.66, when K7When the shaft structure is within the value range of the embodiment, the weight of the shaft structure is reduced to the maximum extent, and the rigidity and the strength of the shaft structure are ensured.
In some embodiments, the bottom of the second screw hole 35 is spaced more than 10mm from the end surface of the rear axle 30 away from the central axis 20, ensuring that the bottom of the second screw hole 35 does not extend through the rear axle 30.
In some embodiments, second screw hole 35 has a diameter D11，D11/D10＝K8，K8The value is within 0.2-0.5. When K is8When the shaft structure is within the value range of the embodiment, the weight of the shaft structure is reduced to the maximum extent, and the rigidity and the strength of the shaft structure are ensured.
In some embodiments, the end surface of the rear axle 30 remote from the central axle 20 is provided with a plurality of jackscrew holes 40. The plurality of jackscrew holes 40 are arranged, on one hand, the shaft structure can be conveniently disassembled and assembled, and meanwhile, the purpose of reducing weight can be achieved. On the other hand, a counterweight means can be provided when the shaft structure is balanced dynamically.
The invention also provides a compressor comprising the shaft structure.
The invention also provides an air conditioner which comprises the compressor.
It is easily understood by those skilled in the art that the above-described modes can be freely combined and superimposed without conflict.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention. The above is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the technical principle of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims (27)

1. A shaft structure, comprising: the novel bicycle front axle assembly comprises a front axle (10), a middle axle (20) and a rear axle (30), wherein the middle axle (20) is embedded in a partial axle section of the front axle (10), the partial axle section of the front axle (10) is sleeved on the periphery of the partial axle section of the rear axle (30), and one axial end of the rear axle (30) is connected with one axial end of the middle axle (20).
2. The axle construction according to claim 1, characterized in that the axial length of the front axle (10) is three times the axial length of the rear axle (30), the axial length of the centre axle (20) is two fifths of the sum of the axial lengths of the front axle (10) and the rear axle (30), the front axle (10) is made of a composite material, the centre axle (20) is made of a steel material, and the rear axle (30) is made of a high molecular polymer.
3. The axle construction according to claim 1, characterized in that the front axle (10) is fixedly mounted with the centre axle (20) in an interference fit, and the front axle (10) is fixedly mounted with the rear axle (30) in an interference fit.
4. The axle construction according to claim 1, characterized in that the front axle (10), the middle axle (20) and the rear axle (30) are arranged coaxially.
5. The shaft structure according to claim 1, characterized in that the front shaft (10) comprises a first shaft section (11), a second shaft section (12) and a third shaft section (13) arranged in sequence and having successively increasing outer diameters, the outer diameter of the first shaft section (11) being D5The second shaft section (12) has an outer diameter D3The middle shaft (20) is embedded in a third shaft section (13), and one end, far away from the second shaft section (12), of the third shaft section (13) is sleeved on the rear shaft (30).
6. A shaft structure according to claim 5, characterized in that the front shaft (10) further comprises a first screw hole (14), a first lightening hole (15) and a second lightening hole (16) which are arranged in the interior thereof in order and have successively larger diameters, the first screw hole (14) having an inner diameter D6The inner diameter of the first lightening hole (15) is D4The inner diameter of the second lightening hole (16) is D2The middle shaft (20) is embedded in the front shaft (10) and is positioned on one side, away from the first lightening hole (15), of the second lightening hole (16).
7. A shaft structure according to claim 6, characterized in that the end of the first shaft section (11) is provided with a locking nut hole (18), the axial distance of the bottom of the locking nut hole (18) from the bottom of the first screw hole (14) being larger than 10mm, and the Dp6/D5＝K5Said K is5The value is within 0.45-0.51.
8. The shaft arrangement according to claim 6, characterized in that the second shaft section (12) has an axial length L3Said first isThe axial distance of the lightening hole (15) is L4The axial distance of the second lightening hole (16) is L2The axial distance between one end of the third shaft section (13) close to the second shaft section (12) and the middle shaft (20) is L1。
9. The shaft structure according to claim 8, characterized in that the L is4/L3＝K3Said K is3The value is within 0.65-0.68, and D is4/D3＝K4Said K is4The value is within 0.55-0.58.
10. A shaft arrangement according to claim 8, characterised in that the third shaft section (13) is provided with two impeller mounts (19) spaced apart on the outer circumference of the second shaft section (12).
11. The shaft arrangement according to claim 10, characterized in that the impeller mounting portion (19) and the third shaft section (13) each adopt a triangular prism configuration.
12. The shaft structure according to claim 11, wherein the triangular prism structure has a cross section formed by at least three segments R1Circular arc and three segments R2Arc of a circle, said R1Arc and R2The circular arcs are arranged at intervals, and the inscribed circle of the section of the triangular prism structure is separated from the R1The maximum distance of the arc is 2 e.
13. The shaft structure according to claim 12, wherein R is the same as R1/R2K, the value of K is in the interval of 1.05-1.07.
14. A shaft structure according to claim 10, characterized in that the diameter of the impeller mounting part (19) is D1。
15. The shaft structure according to claim 14, characterized in that the L2/L1＝K1Said K is1The value is within 0.9-0.92, and D is2/D1＝K2Said K is2The value is within 0.51-0.52.
16. A shaft structure according to claim 5, characterised in that the end face of the third shaft section (13) close to the second shaft section (12) is provided axially with a plurality of jackscrew holes (40).
17. The shaft structure according to claim 1, characterized in that the middle shaft (20) has an outer diameter D7A third lightening hole (21) is axially arranged in the middle shaft (20), and the diameter of the third lightening hole (21) is D8。
18. The shaft structure according to claim 17, characterized in that D is8/D7＝K6Said K is6The value is within 0.62-0.66.
19. The axle construction according to claim 5, characterized in that the rear axle (30) comprises a fourth axle section (31) and a fifth axle section (32) axially end-to-end, the third axle section (13) being arranged to fit over the fourth axle section (31), the fifth axle section (32) being of triangular prism configuration.
20. A shaft structure according to claim 19, characterised in that the rear axle (30) further comprises a fourth lightening hole (33), a fifth lightening hole (34) and a second screw hole (35) arranged axially in this order, the second screw hole (35) being arranged at an end remote from the centre axle (20).
21. The shaft arrangement according to claim 20, characterized in that the fourth shaft section (31) has an outer diameter D7The outer diameter of the fifth shaft section (32) is D9The inner diameter of the fourth lightening hole (33) is D8The inner diameter of the fifth lightening hole (34) is D10。
22. The shaft structure according to claim 21, characterized in that D is10/D9＝K7Said K is7The value is between 0.64 and 0.66.
23. A shaft structure according to claim 22, characterized in that the bottom of the second screw hole (35) is at a distance of more than 10mm from the end surface of the rear shaft (30) remote from the middle shaft (20).
24. The shaft arrangement according to claim 22, characterized in that the diameter of the second screw hole (35) is D11Said D is11/D10＝K8Said K is8The value is within 0.2-0.5.
25. The axle construction as claimed in claim 1, characterized in that the end face of the rear axle (30) remote from the centre axle (20) is provided with a plurality of jackscrew holes (40).
26. A compressor, characterized by comprising a shaft arrangement according to any one of claims 1-23.
27. An air conditioner characterized by comprising the compressor of claim 24.
CN202111313064.3A 2021-11-08 2021-11-08 Shaft structure, compressor and air conditioner Pending CN113944651A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202111313064.3A CN113944651A (en) 2021-11-08 2021-11-08 Shaft structure, compressor and air conditioner

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202111313064.3A CN113944651A (en) 2021-11-08 2021-11-08 Shaft structure, compressor and air conditioner

Publications (1)

Publication Number Publication Date
CN113944651A true CN113944651A (en) 2022-01-18

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Family Applications (1)

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Country Status (1)

Country Link
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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110097222A1 (en) * 2009-10-22 2011-04-28 Honda Motor Co., Ltd. Supercharger
US20190285073A1 (en) * 2018-03-15 2019-09-19 Hyundai Motor Company Rotor assembly for motor
CN213402612U (en) * 2020-11-11 2021-06-08 中山大洋电机股份有限公司 Rotor structure of high-speed permanent magnet synchronous motor
US20210172458A1 (en) * 2018-05-15 2021-06-10 Lg Electronics Inc. Turbo compressor
CN112994292A (en) * 2021-03-30 2021-06-18 西安交通大学 Double-layer sheath permanent magnet motor rotor structure
CN216278633U (en) * 2021-11-08 2022-04-12 珠海格力电器股份有限公司 Shaft structure, compressor and air conditioner

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110097222A1 (en) * 2009-10-22 2011-04-28 Honda Motor Co., Ltd. Supercharger
US20190285073A1 (en) * 2018-03-15 2019-09-19 Hyundai Motor Company Rotor assembly for motor
US20210172458A1 (en) * 2018-05-15 2021-06-10 Lg Electronics Inc. Turbo compressor
CN213402612U (en) * 2020-11-11 2021-06-08 中山大洋电机股份有限公司 Rotor structure of high-speed permanent magnet synchronous motor
CN112994292A (en) * 2021-03-30 2021-06-18 西安交通大学 Double-layer sheath permanent magnet motor rotor structure
CN216278633U (en) * 2021-11-08 2022-04-12 珠海格力电器股份有限公司 Shaft structure, compressor and air conditioner

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