CN105649984B - Compression mechanism and low backpressure rotary compressor - Google Patents
Compression mechanism and low backpressure rotary compressor Download PDFInfo
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- CN105649984B CN105649984B CN201610137502.8A CN201610137502A CN105649984B CN 105649984 B CN105649984 B CN 105649984B CN 201610137502 A CN201610137502 A CN 201610137502A CN 105649984 B CN105649984 B CN 105649984B
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- bearing assembly
- bent axle
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
- F04C18/30—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
- F04C18/34—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members
- F04C18/356—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the outer member
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
- F04C29/02—Lubrication; Lubricant separation
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
Abstract
The invention discloses one kind according to compression mechanism and low backpressure rotary compressor.Compression mechanism includes：Bearing assembly, bearing assembly have centre bore；Cylinder, cylinder are located on bearing assembly, and cylinder has a compression chamber and the vane slot connected with compression chamber, and the end face relative with cylinder is provided with groove on bearing assembly, and groove connects with centre bore；Bent axle, bent axle run through centre bore and cylinder, and bent axle has eccentric part, and eccentric part is located in compression chamber；And piston, piston are set on eccentric part and can rolled along the inwall of compression chamber.According to the compression mechanism of the present invention, by being provided with groove on the end face relative with cylinder in bearing assembly, lubricating oil can be stored in groove, when compression mechanism is in motion, lubricating oil in groove can be flowed between eccentric part and bearing assembly, it is possible thereby to be effectively reduced the abrasion between eccentric part and bearing assembly, reduce friction noise, extend the service life of compression mechanism.
Description
Technical field
The present invention relates to technical field of refrigeration equipment, and specifically, more particularly to a kind of compression mechanism and low back pressure rotate
Formula compressor.
Background technology
Carbon-hydrogen refrigerant is as HCFC (HCFC class), such as R22, and HFC (hydrogen fluorohydrocarbon class), such as R410A or R407C
Alternative refrigerant, the most industry pay close attention to.But when carbon-hydrogen refrigerant is used for into air-conditioner system, there is a critically important class
Topic, it is exactly that it has high combustibility, it is necessary to limit the refrigerant encapsulation amount of hydrocarbon air conditioner device system.
Relative to the rotary compressor of highback laminated structure, exist in a kind of housing in low-pressure i.e. housing and pressure of inspiration(Pi)
The low back-pressure structure rotary compressor of power connection.The content of refrigerant in this low back pressure compressor can be greatly decreased,
The refrigerant encapsulation amount of refrigeration system is greatly reduced.
But existing full low-pressure structure compressor performance is low with respect to high back pressure compressor, low back pressure compressor performance is influenceed
Reason leaks for piston end surface, influences refrigerating capacity；Shafting operates oil viscosity and increased with respect to high back pressure compressor height, friction loss
Cause to increase into power.Performance factor is influenceed based on two above, causes low back pressure performance to be difficult to effectively be lifted.
The content of the invention
It is contemplated that at least solves one of technical problem in correlation technique to a certain extent.Therefore, the present invention carries
Go out a kind of compression mechanism, the compression mechanism has the advantages of high lubricating effect, performance is high.
The present invention also proposes a kind of low backpressure rotary compressor, and the low backpressure rotary compressor has above-mentioned pressure
Contracting mechanism.
Compression mechanism according to embodiments of the present invention, including：Bearing assembly, the bearing assembly have centre bore；Cylinder,
The cylinder is located on the bearing assembly, and the cylinder has compression chamber and the vane slot connected with the compression chamber, described
The end face relative with the cylinder is provided with groove on bearing assembly, and the groove connects with the centre bore；Bent axle, the song
Axle runs through the centre bore and the cylinder, and the bent axle has eccentric part, and the eccentric part is located in the compression chamber；And
Piston, the piston are set on the eccentric part and can rolled along the inwall of the compression chamber.
Compression mechanism according to embodiments of the present invention is recessed by being provided with the end face relative with cylinder in bearing assembly
Groove, lubricating oil can be stored in groove, when compression mechanism is in motion, the lubricating oil in groove can be flowed into eccentric part with
Between bearing assembly, it is possible thereby to be effectively reduced the abrasion between eccentric part and bearing assembly, reduce friction noise, extend pressure
The service life of contracting mechanism.
According to one embodiment of present invention, the face on the basis of the vertical median plane of the vane slot, around the bent axle
Central axis, according to counter clockwise direction the compression mechanism is divided into first quartile, the second quadrant, third quadrant and the 4th
Quadrant, the groove minimum range in the first quartile to the fourth quadrant between the periphery wall of the piston point
Not Wei Lmin1, Lmin2, Lmin3 and Lmin4, and the Lmin1 >=2mm, the Lmin2 >=3mm, the Lmin3 >=4mm,
Lmin4 >=the 5mm.
According to one embodiment of present invention, a diameter of d of the centre bore, the eccentric throw of the eccentric part is e, described
The external diameter of piston is D, and the Lmin1, the Lmin2, the Lmin3 and the Lmin4 meet following relation：
2mm≤Lmin1≤(D-d-e)mm；
3mm≤Lmin2≤(D-d-e)mm；
4mm≤Lmin3≤(D-d-e)mm；
5mm≤Lmin4≤(D-d-e)mm。
According to one embodiment of present invention, there is annular groove, institute on the end face of the close cylinder of the centre bore
The depth in the radial direction that annular groove is stated in the centre bore is d ', and the annular groove connects with the groove, described
Lmin1, the Lmin2, the Lmin3 and the Lmin4 meet following relation：
2mm≤Lmin1≤(D-d-d’-e)mm；
3mm≤Lmin2≤(D-d-d’-e)mm；
4mm≤Lmin3≤(D-d-d’-e)mm；
5mm≤Lmin4≤(D-d-d’-e)mm。
According to one embodiment of present invention, the groove has first end and the second end, and the first end is described
In one quadrant, the line of the central axis of the end points of the first end and the bent axle is t, in the counterclockwise direction, described the
One end is located at the upstream at second end and the reference plane to the angle of the straight line t is α, and the α meets：10°≤α≤
90°。
According to one embodiment of present invention, depth of the groove on the axis direction of the centre bore is h, described
H meets：0.1mm≤h≤1mm.
According to one embodiment of present invention, the groove the cylinder end face upslide shadow outer contour by camber line or
Linear structure into.
According to one embodiment of present invention, it is provided with a plurality of rib in the groove, a plurality of rib is along the groove
Length direction be spaced apart.
According to one embodiment of present invention, the bearing assembly includes：Upper bearing (metal) and lower bearing, the cylinder are folded in
Between the upper bearing (metal) and the lower bearing, the groove is located on the upper surface of the lower bearing and/or the upper bearing (metal)
On lower surface.
Low backpressure rotary compressor according to embodiments of the present invention, including：Housing；And upper described compression mechanism,
The compression mechanism is located in the housing.
Low backpressure rotary compressor according to embodiments of the present invention, passes through the end face relative with cylinder in bearing assembly
Groove is provided with, lubricating oil can be stored in groove, and when compression mechanism is in motion, the lubricating oil in groove can be flowed into
Between eccentric part and bearing assembly, it is possible thereby to be effectively reduced the abrasion between eccentric part and bearing assembly, reduce friction and make an uproar
Sound, extend the service life of compression mechanism.
Brief description of the drawings
Fig. 1 is low backpressure rotary compressor partial structural diagram according to embodiments of the present invention；
Fig. 2 is the upward view of the upper bearing (metal) of compression mechanism according to embodiments of the present invention；
Fig. 3 is the close-up schematic view at A in Fig. 2；
Fig. 4 is along the schematic cross-sectional view in B-B directions in Fig. 2；
Fig. 5 is the upward view of the upper bearing (metal) of compression mechanism according to embodiments of the present invention；
Fig. 6 is the upward view of the upper bearing (metal) of compression mechanism according to embodiments of the present invention；
Fig. 7 is the close-up schematic view at C in Fig. 6；
Fig. 8 is the upward view of the upper bearing (metal) of compression mechanism according to embodiments of the present invention；
Fig. 9 is the upward view of the upper bearing (metal) of compression mechanism according to embodiments of the present invention；
Figure 10 is the top view of the lower bearing of compression mechanism according to embodiments of the present invention；
Figure 11 is the top view of the lower bearing of compression mechanism according to embodiments of the present invention.
Reference：
Low backpressure rotary compressor 100,
Centre bore 111, groove 112, rib 113, annular groove 114, upper bearing (metal) 115, suction hole 123, lower bearing 116,
Cylinder 120, compression chamber 121, vane slot 122, slide plate 124, elastic component 125,
Bent axle 130, eccentric part 131, upper oil hole 132,
Piston 140,
Housing 150, oil sump 151, electric machine assembly 160,
Reference plane m, a diameter of d of centre bore, the eccentric throw of eccentric part are e, and the external diameter of piston is D, straight line t,
Annular groove is d ' in the depth in the radial direction of centre bore, and depth of the groove on the axis direction of centre bore is
H,
First quartile I, the second quadrant II, third quadrant III, fourth quadrant IV.
Embodiment
Embodiments of the invention are described below in detail, the example of the embodiment is shown in the drawings.Below with reference to
The embodiment of accompanying drawing description is exemplary, it is intended to for explaining the present invention, and is not considered as limiting the invention.
Compression mechanism according to embodiments of the present invention is described in detail referring to Fig. 1-Figure 11.
As Figure 1-Figure 11, compression mechanism according to embodiments of the present invention, including：Bearing assembly, cylinder 120, bent axle
130 and piston 140.
Specifically, bearing assembly has centre bore 111.Cylinder 120 is located on bearing assembly, and cylinder 120 has compression
Chamber 121 and the vane slot 122 connected with compression chamber 121.The end face relative with cylinder 120 of bearing assembly is provided with groove 112,
For storing lubricating oil.Groove 112 connects with centre bore 111, and bearing assembly is provided with the suction hole connected with compression chamber 121
123.Bent axle 130 runs through centre bore 111 and cylinder 120, and bent axle 130 has eccentric part 131, and eccentric part 131 is located at compression chamber 121
Interior, piston 140 is set on eccentric part 131 and can rolled along the inwall of compression chamber 121.Slide plate 124 is provided with vane slot 122,
Slide plate 124 in vane slot 122 slidably, with the periphery wall of piston 140 only support, and the afterbody of slide plate 124 leads to by the head of slide plate 124
Elastic component 125 is crossed to offset with cylinder 120.
By the rotation of bent axle 130 to be rolled with inwall of the piston 140 along compression chamber 121, so as to entering compression
Refrigerant in chamber 121 is compressed.The head (one end of the close bent axle 130 of slide plate 124) of slide plate 124 is outer with piston 140
Perisporium only supports, and the afterbody (one end of the remote bent axle 130 of slide plate 124) of slide plate 124 can be connected with spring, thus, work as piston
140 in compression chamber 121 when moving back and forth, and slide plate 124 moves in vane slot 122 therewith, so as to realize in compression chamber 121
The compression of refrigerant.
During compression mechanism is moved, in order to reduce the abrasion between the two of relative motion parts, it is necessary to pressure
Lubricating oil is added in contracting mechanism.For example, bent axle 130, during rotation, eccentric part 131 rotates relative to bearing assembly, is
The abrasion between eccentric part 131 and bearing assembly is reduced, it is necessary to add lubricating oil between.By in bearing assembly
The end face relative with cylinder 120 is provided with groove 112, and lubricating oil can be stored in groove 112, and compression mechanism is in motion process
In, lubricating oil can be added between eccentric part 131 and bearing assembly in time.
Compression mechanism according to embodiments of the present invention, by being provided with the end face relative with cylinder 120 of bearing assembly
Groove 112, lubricating oil can be stored in groove 112, and when compression mechanism is in motion, the lubricating oil in groove 112 can flow
Enter between eccentric part 131 and bearing assembly, it is possible thereby to the abrasion between eccentric part 131 and bearing assembly is effectively reduced,
Reduce friction noise, extend the service life of compression mechanism.
As shown in Fig. 2-Figure 11, according to one embodiment of present invention, the face on the basis of the vertical median plane of vane slot 122
M, central axis around bent axle 130, according to counter clockwise direction compression mechanism is divided into first quartile I, the second quadrant II,
Three quadrants III and fourth quadrant IV.Reference plane m is vertical with the upper and lower end face of cylinder 120 and reference plane m bent axle 130 circumference
Divide equally vane slot 122 on direction.Suction hole 123 is located in first quartile, and groove 112 is in first quartile I to fourth quadrant IV
Minimum range between the periphery wall of piston 140 is respectively Lmin1, Lmin2, Lmin3 and Lmin4, and the Lmin1 >=
2mm, the Lmin2 >=3mm, the Lmin3 >=4mm, the Lmin4 >=5mm.Thus, by making Lmin1 >=2mm, Lmin2
>=3mm, Lmin3 >=4mm, Lmin4 >=5mm can be effectively reduced the friction loss of compression mechanism, lift making for compression mechanism
Use performance.
It should be noted that describing for convenience, " counter clockwise direction " in the present invention is each meant：With the center of bent axle 130
Line centered on axis, from the top down (above-below direction as shown in Figure 1) see, around the direction of the center line rotate counterclockwise.
For example, in Figure 10-Figure 11, shown in Figure 10-Figure 11 is the top view of the end face coordinated with cylinder 120 of bearing assembly
(schematic diagram seen during the end face coordinated with cylinder 120 for observing bearing assembly from the top down), wherein arrow ω is pointed to
For the counter clockwise direction in the present invention；For another example, in Fig. 2-Fig. 3, Fig. 5-Fig. 9, shown in it be bearing assembly with cylinder 120
Upward view (the signal seen during the end face coordinated with cylinder 120 for observing bearing assembly from bottom to top of the end face of cooperation
Figure), wherein arrow ω ' is oriented to the counter clockwise direction in the present invention.
In example as shown in Figure 5, using the vertical center of the vane slot 122 where reference plane m as initial position
Reference plane m is rotated by 90 ° to the p1 of first position by p0, the direction shown in central axis along arrow ω ' around bent axle 130,
The region that reference plane m is turned over is first quartile I；Central axis around bent axle 130 makes shown in reference plane m along arrow ω '
Direction is rotated by 90 ° to second place p2 from first position p1, and the region that reference plane m is turned over is the second quadrant II；Around bent axle 130
Central axis the direction shown in reference plane m along arrow ω ' is rotated by 90 ° from second place p2 to the 3rd position p3, benchmark
The region that face m is turned over is third quadrant III；Make the direction shown in reference plane m along arrow ω ' around the central axis of bent axle 130
It is rotated by 90 ° from the 3rd position p3, reference plane m returns to initial position p0, and the region that reference plane m is turned over is fourth quadrant IV.
In example as shown in Figure 10, using the vertical center of the vane slot 122 where reference plane m as initial position
Reference plane m is rotated by 90 ° to the q1 of first position by q0, the direction shown in central axis along arrow ω around bent axle 130, base
The region that quasi- face m is turned over is first quartile I；Make the direction shown in reference plane m along arrow ω around the central axis of bent axle 130
It is rotated by 90 ° from first position q1 to second place q2, the region that reference plane m is turned over is the second quadrant II；In bent axle 130
Mandrel line makes the direction shown in reference plane m along arrow ω be rotated by 90 ° from second place q2 to the 3rd position q3, m turns of reference plane
The region crossed is third quadrant III；Make direction shown in reference plane m along arrow ω from the 3rd around the central axis of bent axle 130
Position q3 is rotated by 90 °, and reference plane m returns to initial position q0, and the region that reference plane m is turned over is fourth quadrant IV.
I in first quartile, the minimum range between the periphery wall of groove 112 and piston 140 is Lmin1, the Lmin1
≥2mm；In the second quadrant II, the minimum range between the periphery wall of groove 112 and piston 140 is Lmin2, the Lmin2
≥3mm；In third quadrant III, the minimum range between the periphery wall of groove 112 and piston 140 is Lmin3, the Lmin3
≥4mm；In fourth quadrant IV, the minimum range between the periphery wall of groove 112 and piston 140 is Lmin4, the Lmin4
≥5mm。
Further, a diameter of d of the centre bore 111 of bearing assembly, the eccentric throw of eccentric part 131 is e, piston 140
External diameter is D, and the Lmin1, the Lmin2, the Lmin3 and the Lmin4 meet following relation：2mm≤Lmin1≤(D-
d-e)mm；3mm≤Lmin2≤(D-d-e)mm；4mm≤Lmin3≤(D-d-e)mm；5mm≤Lmin4≤(D-d-e)mm.Thus
The friction loss of compression mechanism can further be reduced, lift the performance of compression mechanism.
, in one embodiment of the invention, can be in order to further reduce the friction loss of compression mechanism
Annular groove 114 is opened up on the end face of the close cylinder 120 in heart hole 111.Thus, it is possible to efficiently reduce bearing assembly and cylinder
Contact area between 120, reduce the friction loss of compression mechanism.Depth in the radial direction of the annular groove 114 in centre bore 111
Spend and connected for d ', annular groove 114 with groove 112, the Lmin1, the Lmin2, the Lmin3 and the Lmin4 meet with
Lower relation：2mm≤Lmin1≤(D-d-d’-e)mm；3mm≤Lmin2≤(D-d-d’-e)mm；4mm≤Lmin3≤(D-d-d’-
e)mm；5mm≤Lmin4≤(D-d-d’-e)mm.
According to one embodiment of present invention, groove 112 has first end and the second end, first end in first quartile I,
The line of the end points of first end and the central axis of bent axle 130 is t, and in the counterclockwise direction, first end is located at the upper of the second end
Trip and reference plane m to straight line t angle are α.Here, " first end is located at the upstream at the second end " can refer to and revolve in the counterclockwise direction
When turning reference plane m, the first end that reference plane m is first passed through on groove 112 passes through the second end of groove 112 again, for example, such as Fig. 3 institutes
Show, during along direction rotation reference face m shown in arrow ω ', the first end that reference plane m is first passed through on groove 112 passes through groove again
112 the second end.Due in suction side, easily being connected with high-tension side opening position close to the side of slide plate 124 in first quartile I,
To prevent high and low pressure side from leaking, the α meets：10°≤α≤90°.For example, as shown in Fig. 2-Fig. 3, the first end of groove 112
End points is M, and the end points at the second end of groove 112 is N, groove 112 be distributed in first quartile I, the second quadrant the II and the 3rd as
In limit III, end points M is in first quartile I, and in third quadrant III, the straight line of end points M to the central axis of bent axle 130 is end points N
T, reference plane m to straight line t angle are α in the counterclockwise direction, and the α meets：10°≤α≤90°.
As shown in figure 4, in order to improve the oil storage capacity of groove 112, in one embodiment of the invention, groove 112 exists
Depth on the axis direction of centre bore 111 is h, and the h meets：0.1mm≤h≤1mm.According to one of present invention implementation
Example, the outer contour that groove 112 projects on the end face of cylinder 120 by camber line or linear structure into.That is, groove 112
Side wall is arc-shaped curved surface or plane.
It is provided with a plurality of rib 113 according to some embodiments of the present invention, in groove 112, a plurality of rib 113 is along groove 112
Length direction be spaced apart.As shown in figure 9, two ribs 113 are provided with groove 112, wherein a part for a rib 113
In first quartile I, another part is located in the second quadrant II；A part for an other rib 113 is located at the second quadrant
In II, another part is located in third quadrant III.Thus, the oil storage capacity of compression mechanism can be not only improved, can also be strengthened
The structural strength of bearing assembly.
As shown in figure 1, according to some embodiments of the present invention, bearing assembly includes：Upper bearing (metal) 115 and lower bearing 116, gas
Cylinder 120 is folded between upper bearing (metal) 115 and lower bearing 116, and groove 112 is located on the upper surface of lower bearing 116 and/or upper bearing (metal)
On 115 lower surface.That is, bearing assembly can have a groove 112, the groove 112 can be located at upper bearing (metal) 115
Lower surface on, can also be located on the upper surface of lower bearing 116；Bearing assembly can have two grooves 112, one of them
Groove 112 can be located on the lower surface of upper bearing (metal) 115, and another groove 112 can be located on the upper surface of lower bearing 116.
Low backpressure rotary compressor 100 according to embodiments of the present invention as Figure 1-Figure 11, including：The He of housing 150
Compression mechanism as described above.
Specifically, the bottom of housing 150 is provided with oil sump 151, and compression mechanism is located in housing 150, the song of compression mechanism
Axle 130 has a upper oil hole 132 penetrated along its axis direction, and the lower end of bent axle 130 is through stretching into after bearing assembly, cylinder 120
Into oil sump 151.
Low backpressure rotary compressor 100 according to embodiments of the present invention, by relative with cylinder 120 in bearing assembly
End face be provided with groove 112, lubricating oil can be stored in groove 112, when compression mechanism is in motion, in groove 112
Lubricating oil can be flowed between eccentric part 131 and bearing assembly, it is possible thereby to be effectively reduced eccentric part 131 and bearing assembly
Between abrasion, reduce friction noise, extend the service life of compression mechanism.
Low back pressure according to embodiments of the present invention is described in detail with multiple specific embodiments with reference to the accompanying drawings rotatably to press
Contracting machine 100.It is worth understanding, it is described below to be merely illustrative, rather than the concrete restriction to the present invention.
Embodiment 1
As Figure 1-Figure 5, in this embodiment, low backpressure rotary compressor 100 includes housing 150, electric machine assembly
160 and compression mechanism.
Specifically, the bottom of housing 150 is provided with oil sump 151, and compression mechanism and electric machine assembly 160 are each provided at housing 150
Interior, electric machine assembly 160 is located at the top of the component of housing 150.
Compression mechanism includes：Bearing assembly, cylinder 120, bent axle 130, slide plate 124 and piston 140.Wherein, bearing group
Part includes upper bearing (metal) 115 and lower bearing 116.Cylinder 120 has compression chamber 121 and the vane slot 122 connected with compression chamber 121.
Cylinder 120 is folded between upper bearing (metal) 115 and lower bearing 116, i.e. the lower surface of upper bearing (metal) 115 and the upper surface phase of cylinder 120
Support, the upper surface and the lower surface of cylinder 120 of lower bearing 116 offset.Upper bearing (metal) 115 and lower bearing 116 are respectively provided with centre bore
111.Upper bearing (metal) 115 is provided with suction hole 123, and suction hole 123 connects with compression chamber 121.Bent axle 130 has along its axis direction
The upper oil hole 132 of insertion, the lower end of bent axle 130 sequentially pass through from top to bottom the centre bore 111 of upper bearing (metal) 115, cylinder 120 and under
The bottom that housing 150 is stretched to after the centre bore 111 of bearing 116 is provided with oil sump 151.
The rotor of electric machine assembly 160 is connected with the upper end of bent axle 130, to drive bent axle 130 to rotate.Bent axle 130 has inclined
Center portion 131, eccentric part 131 are located in compression chamber 121, and piston 140 is set on eccentric part 131 and along the inwall of compression chamber 121
It can roll.Slide plate 124 is located in vane slot 122, slide plate 124 in vane slot 122 slidably, the head of slide plate 124 and piston
140 periphery wall is only supported, and the afterbody of slide plate 124 is offseted by elastic component 125 (such as spring) with cylinder 120.
It can be rolled by the rotation of bent axle 130 with inwall of the piston 140 along compression chamber 121, so as to entering pressure
Refrigerant in contracting chamber 121 is compressed.The head (one end of the close bent axle 130 of slide plate 124) of slide plate 124 and piston 140
Periphery wall only supports, and the afterbody (one end of the remote bent axle 130 of slide plate 124) of slide plate 124 can be connected with spring, thus, work as work
When plug 140 moves back and forth in compression chamber 121, slide plate 124 moves in vane slot 122 therewith, so as to realize to compression chamber 121
The compression of interior refrigerant.
The lower surface of upper bearing (metal) 115 is provided with the groove 112 for being used for storing lubricating oil, and groove 112 connects with centre bore 111
It is logical.As shown in Fig. 2 projection of the groove 112 on the upper surface of cylinder 120 is formed as crescent.In the mistake of compression mechanism motion
Cheng Zhong, in order to reduce the abrasion between two parts that relative motion occurs, it is necessary to add lubricating oil into compression mechanism.Example
Such as, during rotation, eccentric part 131 rotates bent axle 130 relative to upper bearing (metal) 115, in order to reduce eccentric part 131 and upper axle
The abrasion between 115 is held, it is necessary to add lubricating oil between.By setting groove on the lower surface of upper bearing (metal) 115
112, lubricating oil can be stored in groove 112, and thus compression mechanism, can be in time to eccentric part 131 in motion process
Lubricating oil is added between upper bearing (metal) 115.
The face m on the basis of the vertical median plane of vane slot 122, central axis around bent axle 130, according to counterclockwise
Compression mechanism is divided into first quartile I, the second quadrant II, third quadrant III and fourth quadrant IV.Reference plane m and cylinder 120
Upper and lower end face it is vertical and reference plane m divides equally vane slot 122 in the circumferential direction of bent axle 130.Suction hole 123 is located at first
In quadrant I, minimum range of the groove 112 in first quartile I to fourth quadrant IV between the periphery wall of piston 140 is respectively
Lmin1, Lmin2, Lmin3 and Lmin4.
I in first quartile, the minimum range between the periphery wall of groove 112 and piston 140 is Lmin1, the Lmin1
≥2mm；In the second quadrant II, the minimum range between the periphery wall of groove 112 and piston 140 is Lmin2, the Lmin2
≥3mm；In third quadrant III, the minimum range between the periphery wall of groove 112 and piston 140 is Lmin3, the Lmin3
≥4mm；In fourth quadrant IV, the minimum range between the periphery wall of groove 112 and piston 140 is Lmin4, the Lmin4
≥5mm。
" counter clockwise direction " in this embodiment is each meant：(above-below direction as shown in Figure 1) is seen from the top down, with
Line centered on the central axis of bent axle 130, around the direction of the center line rotate counterclockwise.For example, in Fig. 2-Fig. 3 and Fig. 5,
Shown in it is the upward view (diagram seen when observing upper bearing (metal) 115 from bottom to top) of upper bearing (metal) 115, wherein arrow
ω ' is oriented to the counter clockwise direction in the present embodiment.
As shown in figure 5, using the vertical center of the vane slot 122 where reference plane m as initial position p0, around bent axle
Reference plane m is rotated by 90 ° to the p1 of first position by the direction shown in 130 central axis along arrow ω ', and reference plane m is turned over
Region be first quartile I；Make the direction shown in reference plane m along arrow ω ' from first around the central axis of bent axle 130
Put p1 to be rotated by 90 ° to second place p2, the region that reference plane m is turned over is the second quadrant II；Central axis around bent axle 130 makes
Direction shown in reference plane m along arrow ω ' is rotated by 90 ° the region turned over to the 3rd position p3, reference plane m from second place p2
For third quadrant III；Make direction shown in reference plane m along arrow ω ' from the 3rd position p3 around the central axis of bent axle 130
It is rotated by 90 °, reference plane m returns to initial position p0, and the region that reference plane m is turned over is fourth quadrant IV.
Further, a diameter of d of the centre bore 111 of upper bearing (metal) 115, the eccentric throw of eccentric part 131 is e, piston 140
External diameter is D, and the Lmin1, the Lmin2, the Lmin3 and the Lmin4 meet following relation：2mm≤Lmin1≤(D-
d-e)mm；3mm≤Lmin2≤(D-d-e)mm；4mm≤Lmin3≤(D-d-e)mm；5mm≤Lmin4≤(D-d-e)mm.Thus
The friction loss of compression mechanism can further be reduced, lift the performance of compression mechanism.
Groove 112 has first end and the second end, and first end is in first quartile I, end points and the bent axle 130 of first end
The line of central axis is t, and in the counterclockwise direction, first end is located at the upstream at the second end and reference plane m to straight line t angle
For α.Here, when " first end is located at the upstream at the second end " can refer to rotation reference face m in the counterclockwise direction, reference plane m is first passed through
The first end crossed on groove 112 passes through the second end of groove 112 again.As shown in figure 3, rotate base along the direction shown in arrow ω '
During quasi- face m, the first end that reference plane m is first passed through on groove 112 passes through the second end of groove 112 again.Due to existing in first quartile I
Suction side, easily connected with high-tension side opening position close to the side of slide plate 124, to prevent high and low pressure side from leaking, such as Fig. 2-Fig. 3 institutes
Show, the end points of the first end of groove 112 is M, and the end points at the second end of groove 112 is N, groove 112 be distributed in first quartile I,
In second quadrant II and third quadrant III, end points M is in first quartile I, and end points N is in third quadrant III, end points M to bent axle
The straight line of 130 central axis is t, and reference plane m to straight line t angle are α in the counterclockwise direction, and the α meets：10°≤α
≤90°。
In order to improve the oil storage capacity of groove 112, depth of the groove 112 on the axis direction of centre bore 111 is h, institute
State h satisfactions：0.1mm≤h≤1mm.
Thus, by being provided with groove 112 on the lower surface of upper bearing (metal) 115, lubricating oil can be stored in groove 112,
When compression mechanism is in motion, the lubricating oil in groove 112 can be flowed between eccentric part 131 and bearing assembly, thus may be used
With the abrasion being effectively reduced between eccentric part 131 and bearing assembly, reduce friction noise, extend compression mechanism uses the longevity
Life.
Embodiment 2
As Figure 6-Figure 8, as different from Example 1, in this embodiment, in the centre bore 111 of upper bearing (metal) 115
Lower end is provided with annular groove 114, and annular groove 114 is d ', annular groove 114 and groove in the depth in the radial direction of centre bore 111
112 connections, the Lmin1, the Lmin2, the Lmin3 and the Lmin4 meet following relation：2mm≤Lmin1≤(D-
d-d’-e)mm；3mm≤Lmin2≤(D-d-d’-e)mm；4mm≤Lmin3≤(D-d-d’-e)mm；5mm≤Lmin4≤(D-d-
d’-e)mm.Thus, it is possible to the contact area between upper bearing (metal) 115 and cylinder 120 is efficiently reduced, so as to reduce compression mechanism
Friction loss.
Embodiment 3
As shown in figure 9, as different from Example 1, in this embodiment, two ribs 113 are provided with groove 112, its
In the part of a rib 113 be located in first quartile I, another part is located in the second quadrant II；An other rib 113
A part be located in the second quadrant II, another part is located in third quadrant III.Thus, compression mechanism can not only be improved
Oil storage capacity, the structural strength of bearing assembly can also be strengthened.
Embodiment 4
As shown in Figure 10, as different from Example 1, in this embodiment, groove 112 is formed on lower bearing 116, i.e.,
Fluted 112 are formed on the upper surface of lower bearing 116.
As shown in Figure 10, using the vertical center of the vane slot 122 where reference plane m as initial position q0, around song
Reference plane m is rotated by 90 ° to the q1 of first position by the direction shown in the central axis of axle 130 along arrow ω, and reference plane m is turned over
Region be first quartile I；Make the direction shown in reference plane m along arrow ω from first around the central axis of bent axle 130
Put q1 to be rotated by 90 ° to second place q2, the region that reference plane m is turned over is the second quadrant II；Central axis around bent axle 130 makes
Direction shown in reference plane m along arrow ω is rotated by 90 ° the region turned over to the 3rd position q3, reference plane m from second place q2
For third quadrant III；The direction shown in reference plane m along arrow ω is set to be revolved from the 3rd position q3 around the central axis of bent axle 130
Turn 90 °, reference plane m returns to initial position q0, and the region that reference plane m is turned over is fourth quadrant IV.
I in first quartile, the minimum range between the periphery wall of groove 112 and piston 140 is Lmin1, the Lmin1
≥2mm；In the second quadrant II, the minimum range between the periphery wall of groove 112 and piston 140 is Lmin2, the Lmin2
≥3mm；In third quadrant III, the minimum range between the periphery wall of groove 112 and piston 140 is Lmin3, the Lmin3
≥4mm；In fourth quadrant IV, the minimum range between the periphery wall of groove 112 and piston 140 is Lmin4, the Lmin4
≥5mm。
Further, a diameter of d of the centre bore 111 of lower bearing 116, the eccentric throw of eccentric part 131 is e, piston 140
External diameter is D, and the Lmin1, the Lmin2, the Lmin3 and the Lmin4 meet following relation：2mm≤Lmin1≤(D-
d-e)mm；3mm≤Lmin2≤(D-d-e)mm；4mm≤Lmin3≤(D-d-e)mm；5mm≤Lmin4≤(D-d-e)mm.Thus
The friction loss of compression mechanism can further be reduced, lift the performance of compression mechanism.
Embodiment 5
As shown in figure 11, as different from Example 4, in this embodiment, lower bearing 116 centre bore 111 it is upper
End is provided with annular groove 114, and annular groove 114 is d ', annular groove 114 and groove 112 in the depth in the radial direction of centre bore 111
Connection, the Lmin1, the Lmin2, the Lmin3 and the Lmin4 meet following relation：2mm≤Lmin1≤(D-d-
d’-e)mm；3mm≤Lmin2≤(D-d-d’-e)mm；4mm≤Lmin3≤(D-d-d’-e)mm；5mm≤Lmin4≤(D-d-
d’-e)mm.Thus, it is possible to the contact area between lower bearing 116 and cylinder 120 is efficiently reduced, so as to reduce compression mechanism
Friction loss.
In the description of the invention, it is to be understood that term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width ",
" thickness ", " on ", " under ", "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom " " interior ", " outer ", " up time
The orientation or position relationship of the instruction such as pin ", " counterclockwise ", " axial direction ", " radial direction ", " circumference " be based on orientation shown in the drawings or
Position relationship, it is for only for ease of and describes the present invention and simplify description, rather than indicates or imply that signified device or element must
There must be specific orientation, with specific azimuth configuration and operation, therefore be not considered as limiting the invention.
In addition, term " first ", " second " are only used for describing purpose, and it is not intended that instruction or hint relative importance
Or the implicit quantity for indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can be expressed or
Implicitly include at least one this feature.In the description of the invention, " multiple " are meant that at least two, such as two, three
It is individual etc., unless otherwise specifically defined.
In the present invention, unless otherwise clearly defined and limited, term " installation ", " connected ", " connection ", " fixation " etc.
Term should be interpreted broadly, for example, it may be fixedly connected or be detachably connected, or integrally；Can be that machinery connects
Connect or electrically connect or can communicate each other；Can be joined directly together, can also be indirectly connected by intermediary, can be with
It is connection or the interaction relationship of two elements of two element internals, is limited unless otherwise clear and definite.For this area
For those of ordinary skill, the concrete meaning of above-mentioned term in the present invention can be understood as the case may be.
In the present invention, unless otherwise clearly defined and limited, fisrt feature can be with "above" or "below" second feature
It is that the first and second features directly contact, or the first and second features pass through intermediary mediate contact.Moreover, fisrt feature exists
Second feature " on ", " top " and " above " but fisrt feature are directly over second feature or oblique upper, or be merely representative of
Fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " lower section " and " below " can be
One feature is immediately below second feature or obliquely downward, or is merely representative of fisrt feature level height and is less than second feature.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or the spy for combining the embodiment or example description
Point is contained at least one embodiment or example of the present invention.In this manual, to the schematic representation of above-mentioned term not
Identical embodiment or example must be directed to.Moreover, specific features, structure, material or the feature of description can be with office
Combined in an appropriate manner in one or more embodiments or example.In addition, in the case of not conflicting, the skill of this area
Art personnel can be tied the different embodiments or example and the feature of different embodiments or example described in this specification
Close and combine.
Although embodiments of the invention have been shown and described above, it is to be understood that above-described embodiment is example
Property, it is impossible to limitation of the present invention is interpreted as, one of ordinary skill in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, changed, replacing and modification.
Claims (8)
- A kind of 1. compression mechanism, it is characterised in that including：Bearing assembly, the bearing assembly have centre bore；Cylinder, the cylinder are located on the bearing assembly, and the cylinder has compression chamber and the cunning connected with the compression chamber Film trap, the end face relative with the cylinder is provided with groove on the bearing assembly, and the groove connects with the centre bore；Bent axle, the bent axle run through the centre bore and the cylinder, and the bent axle has eccentric part, and the eccentric part is located at institute State in compression chamber；AndPiston, the piston are set on the eccentric part and can rolled along the inwall of the compression chamber；The face on the basis of the vertical median plane of the vane slot, central axis around the bent axle, will according to counter clockwise direction The compression mechanism is divided into first quartile, the second quadrant, third quadrant and fourth quadrant, and the groove is in the first quartile To the minimum range in the fourth quadrant between the periphery wall of the piston be respectively Lmin1, Lmin2, Lmin3 and Lmin4, and the Lmin1 >=2mm, the Lmin2 >=3mm, the Lmin3 >=4mm, the Lmin4 >=5mm；A diameter of d of the centre bore, the eccentric throw of the eccentric part are e, and the external diameter of the piston is D, the Lmin1, institute State Lmin2, the Lmin3 and the Lmin4 and meet following relation：2mm≤Lmin1≤(D-d-e)mm；3mm≤Lmin2≤ (D-d-e)mm；4mm≤Lmin3≤(D-d-e)mm；5mm≤Lmin4≤(D-d-e)mm.
- 2. compression mechanism according to claim 1, it is characterised in that on the end face of the close cylinder of the centre bore With annular groove, the annular groove is d ', the annular groove and the groove in the depth in the radial direction of the centre bore Connection, the Lmin1, the Lmin2, the Lmin3 and the Lmin4 meet following relation：2mm≤Lmin1≤(D-d-d’-e)mm；3mm≤Lmin2≤(D-d-d’-e)mm；4mm≤Lmin3≤(D-d-d’-e)mm；5mm≤Lmin4≤(D-d-d’-e)mm。
- 3. compression mechanism according to claim 1, it is characterised in that the groove has first end and the second end, described First end is in the first quartile, and the line of the end points of the first end and the central axis of the bent axle is t, counterclockwise On direction, the first end is located at the upstream at second end and the reference plane to the angle of the t is α, and the α expires Foot：10°≤α≤90°.
- 4. compression mechanism according to claim 1, it is characterised in that the groove is on the axis direction of the centre bore Depth be h, the h meets：0.1mm≤h≤1mm.
- 5. compression mechanism according to claim 1, it is characterised in that the groove is in the outer of the cylinder end face upslide shadow Contour line by camber line or linear structure into.
- 6. compression mechanism according to claim 1, it is characterised in that a plurality of rib is provided with the groove, it is a plurality of described Length direction of the rib along the groove is spaced apart.
- 7. according to the compression mechanism any one of claim 1-6, it is characterised in that the bearing assembly includes：Upper axle Hold and lower bearing, the cylinder are folded between the upper bearing (metal) and the lower bearing, the groove is located at the lower bearing On upper surface and/or on the lower surface of the upper bearing (metal).
- A kind of 8. low backpressure rotary compressor, it is characterised in that including：Housing；AndAccording to the compression mechanism any one of claim 1-7, the compression mechanism is located in the housing.
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| CN204941961U (en) * | 2015-08-21 | 2016-01-06 | 广东美芝制冷设备有限公司 | Rotary compressor and there is its freezing cycle device |
| CN105201830A (en) * | 2015-09-11 | 2015-12-30 | 广东美芝制冷设备有限公司 | Rotary compressor and compression mechanism thereof |
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