CN112780553A - Rotor subassembly, compressor and air conditioner - Google Patents

Rotor subassembly, compressor and air conditioner Download PDF

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Publication number
CN112780553A
CN112780553A CN202110219924.0A CN202110219924A CN112780553A CN 112780553 A CN112780553 A CN 112780553A CN 202110219924 A CN202110219924 A CN 202110219924A CN 112780553 A CN112780553 A CN 112780553A
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CN
China
Prior art keywords
rotor
end surface
face
groove
slot
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
CN202110219924.0A
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Chinese (zh)
Inventor
曹聪
武晓昆
唐晗
毕雨时
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
Original Assignee
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 CN202110219924.0A priority Critical patent/CN112780553A/en
Publication of CN112780553A publication Critical patent/CN112780553A/en
Pending legal-status Critical Current

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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04CROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C18/00Rotary-piston pumps specially adapted for elastic fluids
    • F04C18/08Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C18/12Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
    • F04C18/14Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons
    • F04C18/16Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with helical teeth, e.g. chevron-shaped, screw type
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04CROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C29/00Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04CROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C29/00Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/0021Systems for the equilibration of forces acting on the pump
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04CROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C29/00Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/12Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)
  • Rotary Pumps (AREA)

Abstract

The embodiment of the invention provides a rotor assembly, a compressor and an air conditioner, wherein the compressor comprises the rotor assembly, the rotor assembly comprises a first rotor part and a second rotor part which are meshed with each other, the first rotor part is provided with a first end face and a second end face which is arranged oppositely, the first end face is provided with at least one first groove, and the second end face is provided with at least one second groove; the first groove may form an air film and the second groove may form an air film when the first rotor portion rotates. The embodiment of the invention can reduce the running loss of the compressor, improve the efficiency of the compressor and further improve the efficiency of the air conditioner.

Description

Rotor subassembly, compressor and air conditioner
Technical Field
The invention relates to the technical field of compressors, in particular to a rotor assembly, a compressor and an air conditioner.
Background
The compressor operates by means of a male rotor and a female rotor which move in mesh and by means of the space of the inner wall of the casing surrounding the pair of rotors. When the rotor rotates, the volume between a pair of V-shaped teeth formed by the teeth, tooth grooves and the inner wall of the casing is called as element volume, the volume can be changed periodically, and simultaneously, the element volume can move from the air inlet side to the air outlet side along the axial direction of the rotor, so that the refrigerant gas can be sucked, compressed to a certain pressure and then discharged.
The working process of the compressor is as follows:
(1) and in the air suction process, the volume of the interdental element is gradually enlarged along with the rotation of the rotor and is communicated with the suction hole, and the air enters the volume of the interdental element through the suction hole, so that the air suction process is called as the air suction process. And when the rotor rotates for a certain angle, the volume of the inter-tooth element is separated from the suction hole after passing through the position of the suction hole, and the air suction process is finished.
(2) The compression process, in which the tooth-space element volumes of the driving rotor and the tooth-space element volumes of the driven rotor advance in isolation from each other, is referred to as a transfer process. The rotors continue to rotate by a certain angle, the convex teeth of the driving rotor and the tooth grooves of the driven rotor form a pair of new V-shaped element volumes, and the element volumes are gradually reduced along with the meshing motion of the two rotors, so that the compression process of the gas is realized. The compression process is up to the instant when the cell volume is in communication with the discharge orifice, at which point the venting process begins.
(3) In the exhaust process, as the volume of the element is continuously reduced when the rotor rotates, the compressed gas with certain pressure is sent to the exhaust cavity, and the process is continued until the volume is minimum.
With the continuous rotation of the rotor, the processes of air suction, compression and exhaust are circularly carried out, and the volumes of the elements sequentially work to form the working cycle of the compressor. The gas is compressed at the opposite side of the two rotors, and the compressed gas is called a high-pressure area; on the other hand, the rotors disengage from each other and the elementary volumes between the teeth suck in gas, called the low pressure zone. The high pressure zone is separated from the low pressure zone by a line of contact between two rotor tooth flanks.
In the prior art, in the working process of a screw compressor, the radial force generated by different pressures on two sides of a rotor is related to the diameter, the length-diameter ratio, the internal pressure ratio and the operation condition of the rotor. The axial force is generated by the pressure difference of the gas suction and exhaust ends, and the main load of the compressor during operation is formed. And axial force always points to the suction end from the exhaust end, and the bearing is generally used for balancing the stress, the design of the axial bearing can bear the force in the same direction with the shaft, which is called axial load, but the excessive bearing causes excessive running loss and reduces the efficiency of the compressor, but if the axial bearing does not exist, the rotor can move axially, and the air outlet end face of the rotor can collide with the shell. Therefore, it is required to develop a new rotor assembly, a compressor and an air conditioner to solve the problems of the prior art.
Disclosure of Invention
The embodiment of the invention provides a rotor assembly, a compressor and an air conditioner, which can reduce the running loss of the compressor, improve the efficiency of the compressor and further improve the efficiency of the air conditioner.
The embodiment of the invention provides a rotor assembly, which comprises a first rotor part and a second rotor part, wherein the first rotor part and the second rotor part are meshed with each other, the first rotor part is provided with a first end surface and a second end surface opposite to the first end surface, the first end surface is provided with at least one first groove, and the second end surface is provided with at least one second groove; the first groove may form an air film and the second groove may form an air film when the first rotor portion rotates.
In an alternative embodiment of the present invention, the first rotor portion includes a first rotating shaft and spiral blades disposed outside and spirally distributed around the first rotating shaft;
the spiral blades positioned on the first rotor part are first spiral blades, and a first tooth groove is formed between the two first spiral blades;
the first grooves communicate with first tooth grooves of a first end surface of the first rotor portion, and the second grooves communicate with first tooth grooves of a second end surface of the first rotor portion.
In an alternative embodiment of the invention, the first tank comprises a first inlet and a first outlet cooperating with the first inlet, and the second tank comprises a second inlet and a second outlet cooperating with the second inlet;
the width of the first groove in the direction of the first end surface gradually narrows from a first inlet to a first outlet;
the width of the second groove in the direction of the second end face gradually narrows from a second inlet to a second outlet.
In an alternative embodiment of the present invention, the first groove has a depth in a direction perpendicular to the first end surface that becomes gradually shallower from the first inlet to the first outlet; the depth of the second groove in a direction perpendicular to the second end face becomes gradually shallower from the second inlet to the second outlet.
In an alternative embodiment of the present invention, the first groove and the second groove are each provided along an outer periphery of the first rotor portion so as to be close to an inner periphery of the first rotor portion, the first groove and the second groove are each oriented in a direction opposite to a rotation direction of the first rotor portion, the first outlet of the first groove is located between the outer periphery and the inner periphery of the first end face, and the second outlet of the second groove is located between the outer periphery and the inner periphery of the second end face.
In an optional embodiment of the present invention, the first grooves are spirally distributed on the first end surface around a first axis of the first rotor portion;
the second grooves are spirally distributed on the second end surface by taking the first axis of the first rotor part as a center.
In an alternative embodiment of the present invention, the first groove is provided on an end surface of the first spiral blade of the first end surface, and the second groove is provided on an end surface of the second spiral blade of the second end surface.
In an optional embodiment of the present invention, the second rotor portion has a third end surface and a fourth end surface opposite to the third end surface, the third end surface is provided with at least one third slot, and the fourth end surface is provided with at least one fourth slot; when the second rotor portion rotates, the third groove can pressurize the gas passing through the third groove to form a gas film on the third end face, and the fourth groove can pressurize the gas passing through the fourth groove to form a gas film on the fourth end face.
In an alternative embodiment of the present invention,
the second rotor part comprises a second rotating shaft and spiral blades which are arranged on the outer side of the second rotating shaft and spirally distributed around the second rotating shaft;
the spiral blade positioned on the second rotor part is a second spiral blade, and a second tooth socket is formed between the two second spiral blades;
the third slot is communicated with the second tooth slot of the third end surface of the second rotor part, and the fourth slot is communicated with the second tooth slot of the fourth end surface of the second rotor part.
In an alternative embodiment of the present invention, the third tank comprises a third inlet and a third outlet cooperating with the third inlet, and the fourth tank comprises a fourth inlet and a fourth outlet cooperating with the fourth inlet;
the width of the third groove in the direction of the third end surface is gradually narrowed from a third inlet to a third outlet;
the width of the fourth groove in the direction of the fourth end surface gradually narrows from the fourth inlet to the fourth outlet.
In an alternative embodiment of the present invention, the depth of the third groove in a direction perpendicular to the third end surface is gradually shallower from the third inlet to the third outlet; the depth of the fourth groove in a direction perpendicular to the fourth end surface becomes gradually shallower from the fourth inlet to the fourth outlet.
In an alternative embodiment of the present invention, the third and fourth slots are each provided along an outer periphery of the second rotor portion so as to be close to an inner periphery of the second rotor portion, the third and fourth slots are each oriented in a direction opposite to a rotation direction of the second rotor portion, the third outlet of the third slot is located between the outer periphery and the inner periphery of the third end surface, and the fourth outlet of the fourth slot is located between the outer periphery and the inner periphery of the fourth end surface.
In an optional embodiment of the present invention, the third grooves are spirally distributed on the third end surface around the second axis of the second rotor portion;
the fourth grooves are spirally distributed on the fourth end surface with the second axis of the second rotor part as the center.
In an alternative embodiment of the present invention, the third groove is provided on an end surface of the second spiral blade on the third end surface, and the fourth groove is provided on an end surface of the second spiral blade on the fourth end surface.
In an alternative embodiment of the present invention, the first rotor portion includes a first rotor sub-portion and a second rotor sub-portion that rotate coaxially, end surfaces of the first rotor sub-portion and the second rotor sub-portion that are close to each other are joined, and the first end surface is an end surface of an end of the first rotor sub-portion that is far from the second rotor sub-portion; the second rotor part comprises a third rotor sub-part and a fourth rotor sub-part which rotate coaxially, the end faces of the third rotor sub-part and the fourth rotor sub-part, which are close to each other, are jointed, and the third end face is the end face of one end, which is far away from the fourth rotor sub-part, of the third rotor sub-part.
The present invention also provides a compressor comprising the rotor assembly as described above, further comprising:
the shell comprises a first inner wall opposite to the first end face and a second inner wall opposite to the second end face;
the rotor assembly is rotatably disposed within the housing;
wherein the first end surface is spaced apart from the first inner wall, and the second end surface is spaced apart from the second inner wall;
when the first rotor part rotates in the shell, the first grooves suck gas from first tooth grooves of the first end surface of the first rotor part and pressurize the gas to form a gas film between the first end surface and the first inner wall so as to prevent the first end surface from interfering with the first inner wall of the shell;
when the first rotor part rotates in the shell, the second grooves suck gas from the first tooth grooves of the second end face of the first rotor part and pressurize the gas to form a gas film between the second end face of the second rotor part and the second inner wall of the shell, so that the second end face is prevented from colliding with the second inner wall of the shell.
In an alternative embodiment of the invention, the first end surface and/or the first inner wall is provided with a wear-resistant material.
In an alternative embodiment of the invention, the second end face and/or the second inner wall is provided with a wear-resistant material.
In an alternative embodiment of the present invention, the housing further comprises a third inner wall facing the third end surface, and a fourth inner wall facing the fourth end surface;
the third end surface and the third inner wall are spaced from each other, and the fourth end surface and the fourth inner wall are spaced from each other;
when the second rotor part rotates in the shell, the third grooves suck gas from second tooth grooves of a third end surface of the second rotor part and pressurize the gas to form a gas film between the third end surface and the third inner wall so as to prevent the third end surface from colliding with the third inner wall of the shell;
when the second rotor part rotates in the shell, the fourth groove sucks gas from a fourth tooth groove of a fourth end surface of the second rotor part and pressurizes the gas to form a gas film between the fourth end surface and the fourth inner wall so as to prevent the fourth end surface from colliding with the fourth inner wall of the shell.
In an alternative embodiment of the invention, the third end surface and/or the third inner wall is provided with a wear-resistant material.
In an alternative embodiment of the invention, the fourth end surface and/or the fourth inner wall is provided with a wear-resistant material.
The invention also provides an air conditioner which comprises the compressor.
Compared with the prior art, the compressor comprises the rotor assembly and the shell, the rotor assembly comprises the first rotor part and the second rotor part which are meshed with each other, and the first rotor part and the second rotor part are rotatably arranged in the shell. When the first rotor portion and/or the second rotor portion rotate in the housing, the first grooves suck gas from the first tooth grooves of the first rotor portion and pressurize to form a film of gas between the first end surface of the first rotor portion and the first inner wall of the housing, the film of gas spacing the first end surface from the first inner wall to prevent the first end surface from interfering with the first inner wall of the housing. The second slot is also based on the same principle as the first slot, so that the first rotor portion is spaced from the housing at both ends by the air film. Similarly, the principles of the third and fourth slots of the second rotor section are also the same as those of the first slot.
In other words, the first groove, the second groove and/or the third groove and the fourth groove are respectively arranged on the two end faces of the first rotor part and/or the second rotor part to replace the axial bearings, so that the use of the axial bearings in the compressor can be reduced, the running loss of the compressor caused by the use of the axial bearings is reduced, and the efficiency of the compressor is improved; the working efficiency of the air conditioner using the compressor is also improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.
For a more complete understanding of the present invention, and the advantages thereof, reference is now made to the following descriptions taken in conjunction with the accompanying drawings, wherein like reference numerals represent like parts in the following description.
Fig. 1 is a schematic structural diagram of a first end surface of a first rotor assembly according to an embodiment of the present invention;
FIG. 2 is a cross-sectional view taken along A-A of FIG. 1;
FIG. 3 is a schematic structural diagram of a second end face of a first rotor assembly according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a first end face of a second rotor assembly according to an embodiment of the present invention;
FIG. 5 is a schematic structural view of a second end face of a second rotor assembly according to an embodiment of the present invention;
FIG. 6 is a schematic structural view of a second end face of a third rotor assembly provided in accordance with an embodiment of the present invention;
FIG. 7 is a cross-sectional view taken along line B-B of FIG. 6;
fig. 8 is a schematic view of a partial structure of a compressor according to an embodiment of the present invention.
In the figure:
101. a first axis; 102. a first rotating shaft;
11. a first rotor portion; 111. a first end face; 112. a first groove; 113. a first tooth slot; 114. a first helical blade;
1121. a first inlet; 1122. a first outlet;
121. a second end face; 122. a second groove;
1221. a second inlet; 1222. a second outlet;
201. a second axis; 202. a second rotating shaft;
21. a second rotor portion; 211. a third end face; 212. a third groove; 213. a second tooth slot; 214. a second helical blade;
2121. a third inlet; 2122. a third outlet;
221. a fourth end face; 222. a fourth groove;
2221. a fourth inlet; 2222. a fourth outlet;
3. a housing;
31. a first inner wall; 32. a second inner wall; 33. a third inner wall; 34. a fourth inner wall;
41. a first sub rotor portion; 42. a second sub rotor portion; 43. a third sub rotor portion; 44. and a fourth sub rotor portion.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. 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. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses, but rather, any other embodiment obtained by those skilled in the art without making any inventive changes in the invention or the claims.
Reference herein to "an embodiment" or "an implementation" means that a particular feature, structure, or characteristic described in connection with the embodiment or implementation can be included in at least one embodiment of the invention. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.
Referring to fig. 1-3, fig. 1 is a schematic structural view of a first end surface of a first rotor assembly according to an embodiment of the present invention, fig. 2 is a cross-sectional view taken along a direction a-a shown in fig. 1, and fig. 3 is a schematic structural view of a second end surface of the first rotor assembly according to an embodiment of the present invention. The first rotor assembly disclosed in the present embodiment includes a first rotor portion 11 and a second rotor portion 12, and the first rotor portion 11 and the second rotor portion 12 are engaged with each other. Further, divided from the structure of the first rotor portion 11 itself, the first rotor portion 11 includes a first rotating shaft 102 and spiral blades disposed outside the first rotating shaft 102 and spirally distributed around the first rotating shaft 102, the number of the spiral blades is not less than two, the number of the spiral blades should be an integer, and tooth grooves are formed between the two spiral blades. The spline located at the first rotor portion 11 is a first spline 113.
In the embodiment of the present invention, the number of the spiral blades is five, but may be six, seven, eight, or the like.
The first rotor portion 11 has a first end surface 111 and a second end surface 121 disposed opposite to the first end surface 111, the first end surface 111 is provided with at least one first groove 112, and the first groove 112 communicates with the first tooth groove 113 on the first end surface 111 of the first rotor portion 11. The second end face 121 is provided with at least one second groove 122, and the second groove 122 communicates with the first tooth groove 123 on the second end face 121 of the first rotor portion 11.
The spiral blade located at the first rotor portion 11 is a first spiral blade 114. More specifically, the first groove 112 is provided on the end surface of the first spiral blade 114 of the first end surface 111, and the second groove 122 is provided on the end surface of the first spiral blade 114 of the second end surface 121.
Definition of the number of slots: at least one first groove 112 is formed in the first end surface 111, and in a preferred embodiment of the present invention, one first groove 112 is formed in each end surface of the first spiral blade 114 on the first end surface 111. Similarly, there is at least one second groove 122 on the second end surface 121, and in the preferred embodiment of the present invention, there is one second groove 122 on each end surface of the first spiral blade 114 on the second end surface 121.
The first slot 112 includes a first inlet 1121 and a first outlet 1122 mated with the first inlet 1121. The width of the first groove 112 in the direction of the first end surface 111 gradually narrows from the first inlet 1121 to the first outlet 1122; the depth of the first groove 112 in a direction perpendicular to the first end surface 111 becomes gradually shallower from the first inlet 1121 to the first outlet 1122. The first groove 112 is provided along the outer periphery of the first rotor portion 11 so as to be close to the inner periphery of the first rotor portion 11, the first groove 112 is oriented in the opposite direction to the rotation direction of the first rotor portion 11, and the first outlet 1122 of the first groove 112 is located between the outer periphery and the inner periphery of the first end surface 111. More specifically, the first grooves 112 are uniformly distributed on the first end surface 111 in a spiral shape around the first axis 101 of the first rotor portion 11, in the first end surface 111.
Similarly, the second slot 122 includes a second inlet 1221 and a second outlet 1222 that mates with the second inlet 1221. The width of the second groove 122 in the direction of the second end face 121 gradually narrows from the second inlet 1221 to the second outlet 1222; the depth of the second groove 122 in a direction perpendicular to the second end surface 121 becomes gradually shallower from the second inlet 1221 to the second outlet 1222. The second grooves 122 are provided along the outer periphery of the first rotor portion 11 so as to be close to the inner periphery of the first rotor portion 11, the second grooves 122 are oriented in the opposite direction to the rotation direction of the first rotor portion 11, and the second outlets 1222 of the second grooves 122 are located between the outer periphery and the inner periphery of the second end surface 121. More specifically, the second grooves 122 are uniformly distributed on the second end surface 121 in a spiral shape about the first axis 101 of the first rotor portion 11, and the second grooves 122 are uniformly distributed on the first end surface 111.
It is understood that the first groove 112 and the second groove 122 are dynamic pressure grooves, and specifically, the first groove 112 is a first dynamic pressure groove, and the second groove 122 is a second dynamic pressure groove.
It is to be understood that, in the present embodiment, the dynamic pressure grooves may be provided only at both ends of the first rotor portion 11; or may be provided only at both ends of the second rotor portion 21. Of course, it may be provided at both ends of the first rotor portion 11 and the second rotor portion 21, as will be described in detail below.
Referring to fig. 4-5, fig. 4 is a schematic structural diagram of a first end face of a second rotor assembly according to an embodiment of the present invention, and fig. 5 is a schematic structural diagram of a second end face of the second rotor assembly according to the embodiment of the present invention.
The second rotor assembly disclosed in the embodiment of the present invention also includes a first rotor portion 11 and a second rotor portion 21 that mesh with each other, and is divided from the structure of the second rotor portion 21: the second rotor portion 21 includes a second rotating shaft 202 and at least two helical blades disposed outside the second rotating shaft 202 and spirally distributed around the second rotating shaft 202, the number of the helical blades should be an integer, and a tooth slot is formed between the two helical blades. The slots located in the second rotor portion 21 are second slots 213.
The spiral blade located in the second rotor portion 21 is the second spiral blade 214, and in the embodiment of the present invention, the number of the second spiral blades 214 is five, but may be six, seven, eight, or the like.
It is understood that the second rotor portion 21 has a third end surface 211 and a fourth end surface 221 disposed opposite to the third end surface 211, the third end surface 211 is provided with a third slot 212, and the third slot 212 communicates with the second slot 213 of the third end surface 211. Similarly, the fourth end surface 221 is provided with a fourth groove 222, and the fourth groove 222 is communicated with the second tooth groove 214 of the fourth end surface 221.
The spiral blade located at the second rotor portion 21 is a second spiral blade 214. More specifically, the third groove 212 is provided on the end surface of the second spiral blade 214 of the third end surface 211, and the fourth groove 222 is provided on the end surface of the second spiral blade 214 of the fourth end surface 221.
Definition of the number of slots: at least one third groove 212 is formed in the third end surface 211, and in a preferred embodiment of the present invention, one third groove 212 is formed in each end surface of the second spiral blade 214 on the third end surface 211. Similarly, at least one fourth groove 222 is formed in the fourth end surface 221, and in the preferred embodiment of the present invention, one fourth groove 222 is formed in each end surface of the second spiral blade 214 on the fourth end surface 221.
The third groove 212 includes a third inlet 2121 and a third outlet 2122 coupled to the third inlet 2121. The width of the third groove 212 in the direction of the third end face 211 gradually narrows from the third inlet 2121 to the third outlet 2122; the depth of the third groove 212 in a direction perpendicular to the third end face 211 becomes gradually shallower from the third inlet 2121 to the third outlet 2122. The third slot 212 is provided along the outer periphery of the second rotor portion 21 so as to be close to the inner periphery of the second rotor portion 21, the third slot 212 is oriented in the direction opposite to the rotation direction of the second rotor portion 21, and the third outlet 2122 of the third slot 212 is located between the outer periphery and the inner periphery of the third end surface 211. More specifically, the third grooves 212 are distributed on the third end surface 211 in such a manner that the third grooves 212 are uniformly distributed on the third end surface 211 in a spiral shape around the second axis 201 of the second rotor portion 21.
Similarly, the fourth slot 222 includes a fourth inlet 2221 and a fourth outlet 2222 that mates with the fourth inlet 2221. The width of the fourth groove 222 in the direction of the fourth end surface 221 gradually narrows from the fourth inlet 2221 to the fourth outlet 2222; the depth of the fourth groove 222 in a direction perpendicular to the fourth end surface 221 becomes gradually shallower from the fourth inlet 2221 to the fourth outlet 2222. The fourth slot 222 is provided along the outer periphery of the second rotor portion 21 so as to be close to the inner periphery of the second rotor portion 21, the fourth slot 222 is oriented in the direction opposite to the rotation direction of the second rotor portion 21, and the fourth outlet 2222 of the fourth slot 222 is located between the outer periphery and the inner periphery of the fourth end surface 221. More specifically, the fourth grooves 222 are distributed on the fourth end surface 221 such that the fourth grooves 222 are uniformly distributed on the first end surface 111 in a spiral shape around the second axis 201 of the second rotor portion 21.
It is understood that the third groove and the fourth groove are dynamic pressure grooves, specifically, the third groove is a third dynamic pressure groove, and the fourth groove is a fourth dynamic pressure groove.
Referring to fig. 6 and 7, fig. 6 is a schematic structural view of a second end face of a third rotor assembly according to an embodiment of the present invention, and fig. 7 is a cross-sectional view taken along a direction B-B shown in fig. 6. The third rotor assembly disclosed in the embodiment of the present invention includes a first rotor portion 11 and a second rotor portion 21, the first rotor portion 11 includes a first sub rotor portion 41 and a second sub rotor portion 42 that rotate coaxially, end surfaces of the first sub rotor portion 41 and the second sub rotor portion 42 that are close to each other are joined, the first end surface 111 is an end surface of one end of the first sub rotor portion 41 that is far from the second sub rotor portion 42, and the second end surface 121 is an end surface of one end of the second sub rotor portion 42 that is far from the first sub rotor portion 41.
The second rotor portion 21 includes a third rotor sub-portion 43 and a fourth rotor sub-portion 44 that rotate coaxially, end surfaces of the third rotor sub-portion 43 and the fourth rotor sub-portion 44 that are close to each other are joined, the third end surface 211 is an end surface of the third rotor sub-portion 43 at an end away from the fourth rotor sub-portion 44, and the fourth end surface 221 is an end surface of the fourth rotor sub-portion 44 at an end away from the third rotor sub-portion 43.
In other words, the third rotor assembly provided by the embodiment of the present invention is a four-rotor assembly, and the dynamic pressure generating groove is disposed on the air outlet end face of the four-rotor assembly.
It is understood that the first groove, the second groove, the third groove and the fourth groove are dynamic pressure grooves, and specifically, the first groove is a first dynamic pressure groove, the second groove is a second dynamic pressure groove, the third groove is a third dynamic pressure groove, and the fourth groove is a fourth dynamic pressure groove. In the case of the four-rotor assembly, the dynamic pressure generating grooves may be provided only on two opposing end surfaces of the first rotor portion 11 or the second rotor portion 21, but of course, the dynamic pressure generating grooves may be provided on four end surfaces of the first rotor portion 11 and the second rotor portion 21.
Referring to fig. 8, fig. 8 is a schematic partial structural diagram of a compressor according to an embodiment of the present invention. The embodiment of the invention discloses a compressor, which comprises any one of the rotor assemblies in the embodiments as described above, and further comprises a shell 3, wherein the shell 3 comprises a first inner wall 31 opposite to the first end surface 111 and a second inner wall 32 opposite to the second end surface 121. The first end surface 111 is spaced apart from the first inner wall 31, and the second end surface 121 is spaced apart from the second inner wall 32.
When the first rotor portion 11 rotates within the housing 3, the first grooves 112 suck gas from the first teeth grooves 113 of the first end surface 111 of the first rotor portion 11 and pressurize to form a film of gas between the first end surface 111 of the first rotor portion 11 and the first inner wall 31 of the housing 3, the film of gas spacing the first end surface 111 from the first inner wall 31 to prevent the first end surface 111 from interfering with the first inner wall 31 of the housing 3. Similarly, the second grooves 122 suck the gas from the first grooves 113 of the second end surface 121 of the first rotor portion 11 and pressurize the gas to form a film between the second end surface 121 of the first rotor portion 11 and the second inner wall 32 of the housing 3, and the film separates the second end surface 121 from the second inner wall 32 of the housing 3 to prevent the second end surface 121 from interfering with the second inner wall 32 of the housing 3, so that the two ends of the first rotor portion 11 are spaced from the housing 3 by the film.
That is, the first groove 112 and the second groove 122 are respectively disposed on the two end surfaces of the first rotor portion 11 to replace the axial bearings, so that the use of the axial bearings in the compressor can be reduced, the running loss of the compressor caused by the use of the axial bearings is reduced, and the efficiency of the compressor is further improved; the efficiency of an air conditioner to which the compressor is applied is also improved.
The housing 3 further comprises a third inner wall 33 facing the third end face 211 and a fourth inner wall 34 facing the fourth end face 221. The third end surface 211 and the third inner wall 33 are spaced from each other, and the fourth end surface 221 and the fourth inner wall 34 are spaced from each other.
When the second rotor portion 21 rotates within the housing 3, the third slots 212 suck gas from the second slots 213 of the third end surface 211 of the second rotor portion 21 and pressurize to form a film of gas between the third end surface 211 of the second rotor portion 21 and the third inner wall 33 of the housing 3, which film of gas separates the third end surface 211 and the third inner wall 33 to prevent the third end surface 211 from interfering with the third inner wall 33 of the housing 3. Similarly, the fourth grooves 222 suck gas from the second teeth grooves 214 of the fourth end surface 221 of the second rotor portion 21 and pressurize the gas to form a film between the fourth end surface 221 of the second rotor portion 21 and the fourth inner wall 34 of the casing 3, the film separating the fourth end surface 221 and the fourth inner wall 34 to prevent the fourth end surface 221 from interfering with the fourth inner wall 34 of the casing 3, so that both ends of the first rotor portion 11 are spaced from the casing 3 by the film.
That is, the third slot 212 and the fourth slot 222 are respectively disposed on two end surfaces of the second rotor portion 21 to replace the axial bearings, so that the use of the axial bearings in the compressor can be reduced, the running loss of the compressor caused by the use of the axial bearings is reduced, and the efficiency of the compressor is further improved; the efficiency of an air conditioner to which the compressor is applied is also improved.
At the time of starting or shutting down the compressor, the rotational speed of the rotor assembly may be insufficient, so that the strength of the formed air film may not be sufficient to stably and completely separate the end surface of the first rotor portion 11 from the casing 3, so that there is a little friction between the end surface of the first rotor portion 11 and the casing 3, and thus, the wear-resistant material is provided on the end surfaces of the first and second rotor portions 11 and 21, that is, the first, second, third and fourth end surfaces 111, 121, 211 and 221. Of course, it is also possible to provide wear-resistant material on the first inner wall 31, the second inner wall 32, the third inner wall 33 and the fourth inner wall 34 of the housing 3. The wear-resistant material may be disposed on the first end surface 111, the second end surface 121, the third end surface 211, the fourth end surface 221, the first inner wall 31, the second inner wall 32, the third inner wall 33, and the fourth inner wall 34.
The embodiment of the invention discloses an air conditioner which comprises the compressor of the embodiment. The efficiency of the compressor is improved, and the working efficiency of the air conditioner using the compressor is also improved.
The rotor assembly, the compressor and the air conditioner provided by the embodiment of the invention are described in detail, the principle and the embodiment of the invention are explained by applying specific examples, and the description of the embodiment is only used for helping to understand the method and the core idea of the invention; meanwhile, for those skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.

Claims (22)

1. A rotor assembly comprising a first rotor portion and a second rotor portion intermeshed with each other, the first rotor portion having a first end face and a second end face disposed opposite the first end face, the first end face being provided with at least one first slot and the second end face being provided with at least one second slot; the first groove may form an air film and the second groove may form an air film when the first rotor portion rotates.
2. The rotor assembly of claim 1,
the first rotor part comprises a first rotating shaft and spiral blades which are arranged outside the first rotating shaft and spirally distributed around the first rotating shaft;
the spiral blades positioned on the first rotor part are first spiral blades, and a first tooth groove is formed between the two first spiral blades;
the first grooves communicate with first tooth grooves of a first end surface of the first rotor portion, and the second grooves communicate with first tooth grooves of a second end surface of the first rotor portion.
3. The rotor assembly of claim 2 wherein the first slot includes a first inlet and a first outlet cooperating with the first inlet, and the second slot includes a second inlet and a second outlet cooperating with the second inlet;
the width of the first groove in the direction of the first end surface gradually narrows from a first inlet to a first outlet;
the width of the second groove in the direction of the second end face gradually narrows from a second inlet to a second outlet.
4. The rotor assembly of claim 3 wherein the first slot tapers in depth in a direction perpendicular to the first end surface from a first inlet to a first outlet; the depth of the second groove in a direction perpendicular to the second end face becomes gradually shallower from the second inlet to the second outlet.
5. The rotor assembly of claim 4 wherein the first and second slots are each disposed proximate to an inner periphery of the first rotor portion along an outer periphery of the first rotor portion, the first and second slots each oriented opposite a direction of rotation of the first rotor portion, the first slot first outlet being located between the outer and inner peripheries of the first end face, the second slot second outlet being located between the outer and inner peripheries of the second end face.
6. The rotor assembly of claim 1,
the first grooves are spirally distributed on the first end surface by taking a first axis of the first rotor part as a center;
the second grooves are spirally distributed on the second end surface by taking the first axis of the first rotor part as a center.
7. The rotor assembly of claim 2 wherein the first slot is disposed on an end face of a first helical lobe of the first end face and the second slot is disposed on an end face of a second helical lobe of the second end face.
8. The rotor assembly of claim 1 wherein the second rotor portion has a third end face and a fourth end face disposed opposite the third end face, the third end face being provided with at least one third slot and the fourth end face being provided with at least one fourth slot; the third slot is capable of forming a gas film and the fourth slot is capable of forming a gas film when the second rotor portion rotates.
9. The rotor assembly of claim 8,
the second rotor part comprises a second rotating shaft and spiral blades which are arranged on the outer side of the second rotating shaft and spirally distributed around the second rotating shaft;
the spiral blade positioned on the second rotor part is a second spiral blade, and a second tooth socket is formed between the two second spiral blades;
the third slot is communicated with the second tooth slot of the third end surface of the second rotor part, and the fourth slot is communicated with the second tooth slot of the fourth end surface of the second rotor part.
10. The rotor assembly of claim 9 wherein the third slot includes a third inlet and a third outlet cooperating with the third inlet, and the fourth slot includes a fourth inlet and a fourth outlet cooperating with the fourth inlet;
the width of the third groove in the direction of the third end surface is gradually narrowed from a third inlet to a third outlet;
the width of the fourth groove in the direction of the fourth end surface gradually narrows from the fourth inlet to the fourth outlet.
11. The rotor assembly of claim 10 wherein the depth of the third slot in a direction perpendicular to the third end surface is progressively shallower from a third inlet to a third outlet; the depth of the fourth groove in a direction perpendicular to the fourth end surface becomes gradually shallower from the fourth inlet to the fourth outlet.
12. The rotor assembly of claim 11 wherein the third and fourth slots are each disposed along the outer periphery of the second rotor portion proximate to the inner periphery of the second rotor portion, the third and fourth slots each oriented opposite to the direction of rotation of the second rotor portion, the third slot having a third exit port between the outer and inner peripheries of the third end face and the fourth slot having a fourth exit port between the outer and inner peripheries of the fourth end face.
13. The rotor assembly of claim 12,
the third grooves are spirally distributed on the third end surface by taking the second axis of the second rotor part as a center;
the fourth grooves are spirally distributed on the fourth end surface with the second axis of the second rotor part as the center.
14. The rotor assembly of claim 9 wherein the third slot is disposed on an end face of the second helical lobe of the third end face and the fourth slot is disposed on an end face of the second helical lobe of the fourth end face.
15. The rotor assembly of any one of claims 1-14 wherein the first rotor portion comprises first and second co-rotating sub-rotor portions, the first and second sub-rotor portions engaging end surfaces that are proximate to one another, the first end surface being an end surface of the first sub-rotor portion distal from an end of the second sub-rotor portion; the second rotor part comprises a third rotor sub-part and a fourth rotor sub-part which rotate coaxially, the end faces of the third rotor sub-part and the fourth rotor sub-part, which are close to each other, are jointed, and the third end face is the end face of one end, which is far away from the fourth rotor sub-part, of the third rotor sub-part.
16. A compressor comprising a rotor assembly as claimed in any one of claims 1 to 15, further comprising:
the shell comprises a first inner wall opposite to the first end face and a second inner wall opposite to the second end face;
the rotor assembly is rotatably disposed within the housing;
wherein the first end surface is spaced apart from the first inner wall, and the second end surface is spaced apart from the second inner wall;
when the first rotor part rotates in the shell, gas enters the first groove from the first tooth groove of the first end surface of the first rotor part and is pressurized to form a gas film between the first end surface and the first inner wall so as to prevent the first end surface from interfering with the first inner wall of the shell;
when the first rotor part rotates in the shell, gas enters the first grooves from the first grooves of the second end face of the first rotor part and is pressurized to form a gas film between the second end face of the second rotor part and the second inner wall of the shell, so that the second end face is prevented from interfering with the second inner wall of the shell.
17. A compressor according to claim 16, wherein the first end face and/or the first inner wall is provided with a wear resistant material.
18. The compressor of claim 17, wherein the second end face and/or the second inner wall is provided with a wear resistant material.
19. The compressor of claim 18,
the shell also comprises a third inner wall opposite to the third end surface and a fourth inner wall opposite to the fourth end surface;
the third end surface and the third inner wall are spaced from each other, and the fourth end surface and the fourth inner wall are spaced from each other;
when the second rotor part rotates in the shell, gas enters the third groove from the second tooth groove of the third end surface of the second rotor part and is pressurized to form a gas film between the third end surface and the third inner wall so as to prevent the third end surface from interfering with the third inner wall of the shell;
when the second rotor part rotates in the shell, gas enters the fourth groove from the fourth tooth groove of the fourth end surface of the second rotor part and is pressurized to form a layer of gas film between the fourth end surface and the fourth inner wall so as to prevent the fourth end surface from interfering with the fourth inner wall of the shell.
20. A compressor according to claim 19, wherein the third end face and/or the third inner wall is provided with a wear resistant material.
21. The compressor of claim 20, wherein the fourth end face and/or the fourth inner wall is provided with a wear resistant material.
22. An air conditioner characterized by comprising a compressor according to any one of claims 16 to 21.
CN202110219924.0A 2021-02-26 2021-02-26 Rotor subassembly, compressor and air conditioner Pending CN112780553A (en)

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Application Number Priority Date Filing Date Title
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022179134A1 (en) * 2021-02-26 2022-09-01 珠海格力电器股份有限公司 Rotor assembly, compressor and air conditioner

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022179134A1 (en) * 2021-02-26 2022-09-01 珠海格力电器股份有限公司 Rotor assembly, compressor and air conditioner

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