Cross slip ring and scroll compressor

Abstract

The invention provides a cross-shaped slip ring and a scroll compressor, the cross-shaped slip ring comprises a ring body, the ring body is provided with an outer peripheral surface and an inner hole, and at least one end of the outer peripheral surface in the center line direction of the inner hole is provided with a concave arc-shaped chamfer surface. The ring body is further provided with a circulation hole penetrating from the outer circumferential face to the hole wall of the inner hole, the circulation hole extends in the first direction, and the first direction is the movement direction of the cross-shaped sliding ring in the scroll compressor. At least one end, in the direction of the center line of the inner hole, of the outer circumferential face is provided with the inwards-concave arc-shaped chamfer face, so that streamline design can be formed, when the cross-shaped sliding ring moves in the scroll compressor, oil can move along the arc-shaped chamfer face, the running flow resistance of the cross-shaped sliding ring is reduced, the running power consumption of the compressor is reduced, and the running performance of the compressor is improved. Besides, the arc-shaped chamfered surface structure is matched with the circulation hole structure, so that the power consumption of the compressor can be obviously reduced, and the reduction amplitude is between 0.33% and 0.93%.

Description

Technical Field

[0001] The invention belongs to the technical field of scroll compressors, and in particular relates to a cross slip ring and a scroll compressor. Background Art

[0002] At present, the development of scroll compressors is moving towards high efficiency. In this process, due to their own structural design characteristics, there is a problem of high power consumption during operation. The flow resistance of the cross slip ring in the upper bracket oil pool is one of the main reasons for the increase in its power consumption, which has become a major bottleneck restricting its energy efficiency improvement. Summary of the invention

[0003] Therefore, the present invention provides a cross slip ring and a scroll compressor, which can solve the technical problem in the prior art that the cross slip ring has a large running flow resistance in the upper bracket oil pool, resulting in high power consumption of the compressor.

[0004] In order to solve the above problems, the present invention provides a cross slip ring, which includes a ring body, wherein the ring body has an outer peripheral surface and an inner hole, and at least one end of the outer peripheral surface in the center line direction of the inner hole has a concave arc chamfered surface.

[0005] In some embodiments, when both ends of the outer peripheral surface in the direction of the center line of the inner hole have concave arc-shaped chamfered surfaces, the arc-shaped chamfered surfaces at both ends of the outer peripheral surface in the direction of the center line of the inner hole are symmetrically arranged.

[0006] In some embodiments, the ring body further has a flow hole penetrating from the outer peripheral surface to the inner hole wall, and the flow hole extends along a first direction, and the first direction is the movement direction of the cross ring in the scroll compressor.

[0007] In some embodiments, one end of the ring body in the centerline direction of the inner hole is a first end; and the first end is provided with the flow hole.

[0008] In some embodiments, the outer peripheral surface has the arc-shaped chamfered surface at the first end; the flow hole at the first end is defined as the first flow hole, and the arc-shaped chamfered surface of the outer peripheral surface at the first end is the first arc-shaped chamfered surface; wherein, the end of the first flow hole facing away from the inner hole passes through the first arc-shaped chamfered surface.

[0009] In some embodiments, one end of the first arcuate chamfered surface is connected to the end surface of the first end; the first flow hole has a first side close to the end surface of the first end and a second side away from the end surface of the first end; wherein, in the center line direction of the inner hole, the distance between the other end of the first arcuate chamfered surface and the end surface of the first end is H, and the distance between the second side of the first flow hole and the end surface of the first end is H1, H1=1 / 3H~1 / 2H.

[0010] In some embodiments, the other end of the ring body in the centerline direction of the inner hole is the second end; the second end is also provided with the flow hole; wherein the flow hole at the first end is symmetrically arranged with the flow hole at the second end.

[0011] In some embodiments, the number of the flow holes is two or more, and includes a first a flow hole and a second a flow hole, and the center lines of the first a flow hole and the second a flow hole coincide with each other.

[0012] In some embodiments, the outer radius of the ring body is R, and the width of the flow hole in the first direction is L;

[0013] The number of the flow holes is N, where N is a positive integer greater than or equal to 2; wherein N*L=a*R, a=1 / 4 to 1 / 3.

[0014] The present invention also provides a scroll compressor, which comprises any one of the cross slip rings described above.

[0015] The cross slip ring and scroll compressor provided by the present invention have the following beneficial effects:

[0016] 1. Since at least one end of the outer surface in the direction of the center line of the inner hole has a concave arc chamfered surface, a streamlined design can be formed. When the cross ring moves in the scroll compressor, the oil can move along the arc chamfered surface, reducing the running flow resistance of the cross ring, reducing the power consumption of the compressor, and improving the running performance of the compressor.

[0017] 2. A flow hole is provided on the ring body, which passes through from the outer peripheral surface to the inner hole wall, and the extension direction of the flow hole is consistent with the movement direction of the cross slip ring in the scroll compressor. When the cross slip ring moves in the scroll compressor, the oil in the oil pool of the upper bracket can flow along the flow hole; wherein, the setting of the flow hole can directly reduce the oil sweeping area of ​​the cross slip ring, thereby reducing the flow resistance of the cross slip ring, reducing the power consumption of the compressor, and improving the operating performance of the compressor.

[0018] 3. The arc chamfered surface structure of the present invention cooperates with the flow hole structure to significantly reduce the power consumption of the compressor, with the reduction ranging from 0.33% to 0.93%. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. The drawings described below are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0020] Figure 1 It is a schematic diagram of the structure of a conventional cross slip ring in the prior art;

[0021] Figure 2 It is a structural schematic diagram of a cross slip ring provided by an embodiment of the invention;

[0022] Figure 3 yes Figure 2 Sectional view along AA direction;

[0023] Figure 4 is a schematic structural diagram of another cross slip ring provided by an embodiment of the invention;

[0024] Figure 5 is a structural schematic diagram of a scroll compressor provided by one embodiment of the present invention;

[0025] Figure 6 It is a schematic structural diagram of the upper bracket of the present invention;

[0026] Figure 7 A comparison chart of compressor power consumption under different working conditions is shown.

[0027] The accompanying drawings are marked as follows:

[0028] 1. movable scroll; 2. casing; 3. upper bracket; 4. fixed scroll; 5. main bearing; 6. motor; 7. crankshaft; 8. auxiliary bearing; 9. lower cover; 10. cross ring; 10a. inner hole; 10b. outer peripheral surface; 10c. first side; 10d. second side; 101. first end; 102. second end; 103. arc chamfered surface; 301-upper bracket oil pool; 1001. circulation hole; 1001a. first circulation hole; 1031. first arc chamfered surface; a. first direction; 1001b. first a circulation hole; 1001c. second a circulation hole. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0031] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0032] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0033] See also Figure 2-4 As shown, according to an embodiment of the present invention, a cross slip ring 10 is provided, which includes a ring body having an outer peripheral surface 10b and an inner hole 10a. The outer peripheral surface 10b has a concave arc chamfered surface 103 at at least one end in the center line direction of the inner hole 10a.

[0034] In the above example, since at least one end of the outer surface 10b in the direction of the center line of the inner hole 10a has a concave arc chamfered surface 103, a streamlined design can be formed. When the cross ring 10 moves in the scroll compressor, the oil can move along the arc chamfered surface 103, reducing the operating flow resistance of the cross ring 10, reducing the operating power consumption of the compressor, and improving the operating performance of the compressor.

[0035] In some embodiments, Figure 3 As shown, when both ends of the outer surface 10b in the center line direction of the inner hole 10a have concave arc chamfered surfaces 103, the arc chamfered surfaces 103 at both ends of the outer surface 10b in the center line direction of the inner hole 10a are symmetrically arranged, so that the appearance of the cross slip ring is smoother, which is beneficial to further reduce the running flow resistance of the cross slip ring 10, reduce the running power consumption of the compressor, and improve the running performance of the compressor.

[0036] In some embodiments, Figure 2-4 As shown, the aforementioned ring body also has a flow hole 1001 penetrating from the outer peripheral surface 10b to the hole wall of the inner hole 10a. The flow hole 1001 extends along a first direction a, which is the movement direction of the cross ring 10 in the scroll compressor.

[0037] In the above example, a flow hole 1001 is provided on the ring body, which passes through from the outer peripheral surface 10b to the wall of the inner hole 10a, and the extension direction of the flow hole 1001 is consistent with the movement direction of the cross ring 10 in the scroll compressor. In this way, when the cross ring 10 moves in the scroll compressor, the oil in the oil pool of the upper bracket 3 can flow along the flow hole 1001; wherein, the setting of the flow hole can directly reduce the oil sweeping area of ​​the cross ring 10, thereby reducing the flow resistance of the cross ring 10, reducing the power consumption of the compressor, and improving the operating performance of the compressor.

[0038] In some embodiments, Figure 3 As shown, one end of the ring body in the center line direction of the inner hole 10a is the first end 101, and the first end 101 is provided with the aforementioned flow hole 1001. In one example, Figure 2-3 As shown, the flow hole 1001 can be arranged inside the first end 101, and the flow hole 1001 does not penetrate the end surface of the first end 101. In another example, as shown in FIG. Figure 4 As shown, the flow hole 1001 can be arranged on the end surface of the first end 101 . In this case, the flow hole 1001 is a slot, and the flow hole 1001 passes through the end surface of the first end 101 .

[0039] In some embodiments, Figure 3As shown, the aforementioned outer peripheral surface 10b has the aforementioned arcuate chamfered surface 103 at the first end 101. The flow hole 1001 at the first end 101 is defined as the first flow hole 1001a, and the arcuate chamfered surface 103 of the outer peripheral surface 10b at the first end 101 is defined as the first arcuate chamfered surface 1031. Among them, the end of the first flow hole 1001a away from the inner hole 10a passes through the first arcuate chamfered surface 1031.

[0040] In the above example, the first flow hole 1001a and the first arc-shaped chamfered surface 1031 cooperate with each other. When the cross ring 10 moves in the scroll compressor, the oil can move along the arc-shaped chamfered surface 103 and pass through the first flow hole 1001a; wherein the arc-shaped chamfered surface 103 can guide the movement of the oil to the first flow hole 1001a, thereby further reducing the operating flow resistance of the cross ring 10, reducing the operating power consumption of the compressor, and improving the operating performance of the compressor.

[0041] In some embodiments, Figure 3 As shown, one end of the aforementioned first arcuate chamfered surface 1031 is connected to the end surface of the first end 101. The first flow hole 1001a has a first side 10c close to the end surface of the first end 101 and a second side 10d away from the end surface of the first end 101. In the centerline direction of the inner hole 10a, the distance between the other end of the first arcuate chamfered surface 1031 and the end surface of the first end 101 is H, and the distance between the second side 10d of the first flow hole 1001a and the end surface of the first end 101 is H1, H1 = 1 / 3H ~ 1 / 2H.

[0042] In the above example, the second side 10d of the first flow hole 1001a is the bottom side, wherein, by designing the distance between the bottom side of the first flow hole 1001a and the end face of the first end 101 to be 1 / 3H to 1 / 2H, it is beneficial for oil to flow into the first flow hole 1001a, so as to further reduce the running flow resistance of the cross slip ring 10, reduce the running power consumption of the compressor, and improve the running performance of the compressor.

[0043] In some embodiments, Figure 3 As shown, the other end of the aforementioned ring body in the direction of the center line of the inner hole 10a is the second end 102; the second end 102 is also provided with the aforementioned flow hole 1001. The flow hole 1001 of the first end 101 and the flow hole 1001 of the second end 102 are symmetrically arranged, so that the force on the cross slip ring 10 is more uniform, which is conducive to further reducing the running flow resistance of the cross slip ring 10, reducing the power consumption of the compressor, and improving the running performance of the compressor.

[0044] In some embodiments, Figure 2As shown, the number of the aforementioned flow holes 1001 is more than two, and includes a first flow hole a 1001b and a second flow hole a 1001c. Among them, the center lines of the first flow hole a 1001b and the second flow hole a 1001c coincide. In this way, when the cross ring 10 moves along the first direction a, the fluid on the center lines of the first flow hole a 1001b and the second flow hole a 1001c can move in the same direction without being hindered, which is conducive to further reducing the running flow resistance of the cross ring 10, reducing the running power consumption of the compressor, and improving the running performance of the compressor.

[0045] In some embodiments, Figure 2 As shown, the outer radius of the ring body is R, and the width of the flow hole 1001 in the first direction a is L. The number of the flow holes 1001 is N, where N is a positive integer greater than or equal to 2. Wherein, N*L=a*R, a=1 / 4 to 1 / 3.

[0046] In the above example, by limiting the total width of the flow hole 1001, the flow resistance during the operation of the cross ring 10 can be reduced while the structural strength of the cross ring 10 can be ensured.

[0047] Figure 7 A comparison chart of compressor power consumption under different working conditions is shown. Among them, the scheme of the present invention is: the outer circle radius of the ring body is R, and the width of the flow hole 1001 in the first direction a is L. The number of flow holes 1001 is N, and N is a positive integer greater than or equal to 2. Among them, N*L=a*R, a=1 / 4~1 / 3; and in the center line direction of the inner hole 10a, the distance between the other end of the first arc chamfered surface 1031 and the end face of the first end 101 is H, and the distance between the second side of the first flow hole 1001a and the end face of the first end 101 is 1 / 3H~1 / 2H. The comparison scheme is: there is no flow hole 1001 design on the cross slip ring 10, and there is no concave arc chamfered surface 103 design on the end of the outer peripheral surface 10b of the cross slip ring 10 in the center line direction of the inner hole 10a. From this Figure 7 It can be seen that, compared with the comparative solution, the solution of the present invention can effectively reduce the power consumption of the compressor in working conditions 1 to 7. Among them, working conditions 1 to 7 are 7 commonly used working conditions for compressors. Figure 7It can be seen from the difference ratio line in that under working condition 1, the power consumption of the compressor of the scheme of the present invention is reduced by 0.57% relative to the comparative scheme; under working condition 2, the power consumption of the compressor of the scheme of the present invention is reduced by 0.55% relative to the comparative scheme; under working condition 3, the power consumption of the compressor of the scheme of the present invention is reduced by 0.93% relative to the comparative scheme; under working condition 4, the power consumption of the compressor of the scheme of the present invention is reduced by 0.81% relative to the comparative scheme; under working condition 5, the power consumption of the compressor of the scheme of the present invention is reduced by 0.33% relative to the comparative scheme; under working condition 6, the power consumption of the compressor of the scheme of the present invention is reduced by 0.73% relative to the comparative scheme; under working condition 7, the power consumption of the compressor of the scheme of the present invention is reduced by 0.90% relative to the comparative scheme. In summary, it can be seen that the power consumption of the compressor of the scheme of the present invention is significantly reduced relative to the comparative scheme, and the reduction range is between 0.33% and 0.93%.

[0048] The present invention also provides a scroll compressor, which includes any one of the above-mentioned cross rings 10. Among them, because the scroll compressor adopts the above-mentioned cross ring 10, since at least one end of the outer peripheral surface 10b in the center line direction of the inner hole 10a has a concave arc chamfered surface 103, a streamlined design can be formed. When the cross ring 10 moves in the scroll compressor, the oil can move along the arc chamfered surface 103, reducing the running flow resistance of the cross ring 10, reducing the compressor running power consumption, and improving the compressor running performance.

[0049] like Figure 5 As shown, the scroll compressor of the present invention also includes a movable scroll 1, a casing 2, an upper bracket 3, a fixed scroll 4, a main bearing 5, a motor 6, a crankshaft 7, a secondary bearing 8, a lower cover 9 and an upper cover. The motor 6 includes a stator and a rotor sleeved on the crankshaft 7. The motor 6 is fixed to the casing 2 by cold pressing or shrink fitting, and the upper bracket 3 is connected to the casing 2 by welding. The fixed scroll 4 and the movable scroll 1 are oppositely mounted on the upper bracket 3 with a phase angle difference of 180 degrees. Under the driving action of the crankshaft 7, the movable scroll 1 meshes with the fixed scroll 4 to form a series of crescent-shaped closed cavities that are isolated from each other and whose volumes gradually change.

[0050] When the compressor is running, the motor 6 drives the crankshaft 7 to rotate. The top of the crankshaft 7 has an eccentric crank section at the contact point with the movable scroll 1. The eccentric crank section drives the movable scroll 1 to perform eccentric operation with a fixed rotation radius, and under the anti-rotation effect of the cross slip ring 10, the actual running path of the movable scroll 1 is a gyratory translation. The refrigerant entering from the outside of the compressor is sucked into the crescent-shaped suction cavity formed by the fixed scroll 4 and the movable scroll 1, and then discharged from the exhaust port of the fixed scroll 4 to the closed cavity formed by the shell 2 and the lower cover 9, and then discharged from the compressor through the exhaust copper pipe on the shell 2.

[0051] Figure 6 FIG. 3 shows a schematic diagram of the structure of an upper bracket 3. Figure 6As shown, during the operation of the compressor, the cross ring 10 runs in the oil pool of the upper bracket 3 on the upper bracket 3. The cross ring 10 cooperates with the upper bracket 3 and the moving plate respectively. In the oil pool of the upper bracket 3, the cross ring 10 performs reciprocating linear motion. Since there is a lot of lubricating oil in the oil pool, there is a large resistance during the operation of the cross ring 10. Figure 1 FIG. 1 shows a schematic structural diagram of an existing cross slip ring 10. Figure 1 As shown, no flow-through structure is provided on the cross slip ring 10 . Figure 2 FIG. 1 shows a schematic structural diagram of a cross slip ring 10 of the present invention. Figure 2 As shown, the cross ring 10 is provided with a streamline structure (i.e. the aforementioned concave arc chamfered surface 103) and a plurality of flow holes 1001 in its running direction. The flow resistance during the operation of the cross ring 10 can be reduced by providing the streamline structure (i.e. the aforementioned concave arc chamfered surface 103) and the flow holes 1001. The flow holes 1001 can directly reduce the oil sweeping area of ​​the cross ring 10, thereby reducing the flow resistance, thereby reducing the power consumption of the compressor, and improving the energy efficiency of the compressor.

[0052] It is easy for those skilled in the art to understand that, without conflict, the advantageous technical features of the above-mentioned methods can be freely combined and superimposed.

[0053] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention. The above description is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and variations can be made without departing from the technical principles of the present invention. These improvements and variations should also be regarded as the protection scope of the present invention.

Claims

1. A cross slip ring (10), characterized in that: The invention comprises a ring body, wherein the ring body has an outer peripheral surface (10b) and an inner hole (10a), and at least one end of the outer peripheral surface (10b) in the center line direction of the inner hole (10a) has an inwardly concave arc chamfered surface (103).

2. The cross slip ring (10) according to claim 1, characterized in that: When both ends of the outer peripheral surface (10b) in the direction of the center line of the inner hole (10a) have inwardly concave arc-shaped chamfered surfaces (103), the arc-shaped chamfered surfaces (103) at both ends of the outer peripheral surface (10b) in the direction of the center line of the inner hole (10a) are symmetrically arranged.

3. The cross slip ring (10) according to claim 1 or 2, characterized in that: The ring body also has a flow hole (1001) that passes through from the outer peripheral surface (10b) to the wall of the inner hole (10a), and the flow hole (1001) extends along a first direction (a), and the first direction (a) is the movement direction of the cross slip ring (10) in the scroll compressor.

4. The cross slip ring (10) according to claim 3, characterized in that: One end of the ring body in the direction of the center line of the inner hole (10a) is the first end (101); the first end (101) is provided with the flow hole (1001).

5. The cross slip ring (10) according to claim 4, characterized in that: The outer peripheral surface (10b) has the arc-shaped chamfered surface (103) at the first end (101); the flow hole (1001) at the first end (101) is defined as a first flow hole (1001a), and the arc-shaped chamfered surface (103) of the outer peripheral surface (10b) at the first end (101) is defined as a first arc-shaped chamfered surface (1031); wherein, the end of the first flow hole (1001a) that is away from the inner hole (10a) passes through the first arc-shaped chamfered surface (1031).

6. The cross slip ring (10) according to claim 5, characterized in that: One end of the first arcuate chamfered surface (1031) is connected to the end surface of the first end (101); the first circulation hole (1001a) has a first side (10c) close to the end surface of the first end (101) and a second side (10d) away from the end surface of the first end (101); wherein, in the direction of the center line of the inner hole (10a), the distance between the other end of the first arcuate chamfered surface (1031) and the end surface of the first end (101) is H, and the distance between the second side (10d) of the first circulation hole (1001a) and the end surface of the first end (101) is H1, H1=1 / 3H~1 / 2H.

7. The cross slip ring (10) according to claim 4, characterized in that: The other end of the ring body in the center line direction of the inner hole (10a) is the second end (102); the second end (102) is also provided with the circulation hole (1001); wherein the circulation hole (1001) of the first end (101) and the circulation hole (1001) of the second end (102) are symmetrically arranged.

8. The cross slip ring (10) according to any one of claims 1-2 and 4-7, characterized in that: The number of the circulation holes (1001) is more than two, and includes a first a circulation hole (1001b) and a second a circulation hole (1001c), and the center lines of the first a circulation hole (1001b) and the second a circulation hole (1001c) coincide with each other.

9. The cross slip ring (10) according to any one of claims 1-2 and 4-7, characterized in that: The outer radius of the ring body is R, and the width of the flow hole (1001) in the first direction (a) is L; The number of the flow holes (1001) is N, where N is a positive integer greater than or equal to 2; wherein N*L=a*R, a=1 / 4 to 1 / 3.

10. A scroll compressor, characterized in that: The invention comprises the Cross slip ring (10) according to any one of claims 1 to 9.

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