SCROLL ASSEMBLY AND SCROLL COMPRESSOR

Abstract

A scroll assembly includes an orbiting scroll and a cross ring. The orbiting scroll is configured to have a bottom plate. A plurality of bayonets and two positioning slots are provided on the outer peripheral surface of the bottom plate. The bayonets are adapted to be clamped by a chuck of a turning tool. The two positioning slots are arranged centrally symmetrically relative to the center of the orbiting scroll. Each of the positioning slots comprises two radial vertical surfaces, a circumferential vertical surface and an opening facing outwards in the radial direction. The cross ring is configured to have an annular body and two positioning pins. The lower surface of the bottom plate is slidably fitted on the upper surface of the annular body, each of the positioning pins is inserted into a corresponding positioning slot, and the positioning pins can slide back and forth relative to the positioning slot, so that the orbiting scroll can slide back and forth relative to the cross ring in the radial direction of the orbiting scroll. An annular groove adapted for being formed by turning is provided on the lower surface of the bottom plate of the orbiting scroll, and a chamfer is formed on the edge of the annular groove formed by the intersection of the circumferential vertical surface of the positioning groove and the lower surface of the bottom plate.

Claims

1. A scroll assembly adapted for a scroll compressor, comprising: an orbiting scroll configured to have a bottom plate with an upper surface, a lower surface and an outer peripheral surface, and a scroll arranged on the upper surface of the bottom plate, and the outer peripheral surface of the bottom plate being provided with: a plurality of bayonets adapted to be clamped by a chuck of a turning tool for turning the orbiting scroll by the turning tool; and two positioning slots, each of which being generally “” shaped and the two positioning slots being arranged centrally symmetrically relative to the center of the orbiting scroll when viewed in the direction of the central axis of the orbiting scroll, wherein each of the positioning slots comprises two radial vertical surfaces, a circumferential vertical surface and an opening facing outwards in the radial direction of the orbiting scroll; and a cross ring configured to have an annular body and two positioning pins provided on the upper surface of the annular body, the two positioning pins being centrally symmetrically arranged relative to the center of the cross ring, wherein in the state where the orbiting scroll is assembled to the cross ring, the lower surface of the bottom plate is slidably fitted on the upper surface of the annular body, each of the positioning pins is inserted into a corresponding positioning slot, and the positioning pins are slidable back and forth relative to the positioning slot in the radial direction of the orbiting scroll, so that the orbiting scroll is slidable back and forth relative to the cross ring in the radial direction of the orbiting scroll, wherein an annular groove adapted for being formed by turning is provided on the lower surface of the bottom plate of the orbiting scroll, and the annular groove is sized such that a chamfer is formed on the edge of the annular groove formed by the intersection of the circumferential vertical surface of a positioning slot and the lower surface of the bottom plate.

2. The scroll assembly according to claim 1, wherein the diameter of the neutral circle of the annular groove is greater than the distance between the circumferential vertical surfaces of the two positioning slots in the radial direction of the orbiting scroll.

3. The scroll assembly according to claim 1, wherein the cross-sectional profile of the annular groove is “Λ” shaped.

4. The scroll assembly according to claim 1, wherein the chamfer is a 45° chamfer or a non-45° chamfer.

5. The scroll assembly according to claim 4, wherein a positioning pin is configured to have a vertical surface opposite to the circumferential vertical surface of a positioning slot, and an inner fillet is formed at the edge where the vertical surface of a positioning pin intersects with the upper surface of the annular body.

6. The scroll assembly according to claim 5, wherein the radius of the inner fillet is less than or equal to the length of the right-angled side of the chamfer.

7. A scroll compressor, wherein the scroll compressor comprises the scroll assembly according to claim 1.

8. The scroll assembly according to claim 2, wherein the cross-sectional profile of the annular groove is “Λ” shaped.

9. A scroll compressor, wherein the scroll compressor comprises the scroll assembly according to claim 2.

10. A scroll compressor, wherein the scroll compressor comprises the scroll assembly according to claim 3.

11. A scroll compressor, wherein the scroll compressor comprises the scroll assembly according to claim 4.

12. A scroll compressor, wherein the scroll compressor comprises the scroll assembly according to claim 5.

13. A scroll compressor, wherein the scroll compressor comprises the scroll assembly according to claim 6.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to facilitate understanding of the present disclosure, the present disclosure is hereinafter described in more detail based on exemplary embodiments in conjunction with the accompanying drawings. The same or similar reference numbers are used in the accompanying drawings to refer to the same or similar components. It should be understood that the accompanying drawings are only schematic and the sizes and proportions of the components in the accompanying drawings are not necessarily accurate.

[0019] FIG. 1A is an exploded perspective view of an orbiting scroll and a cross ring of a scroll compressor in the prior art.

[0020] FIG. 1B is a longitudinal cross-sectional view of the orbiting scroll and the cross ring shown in FIG. 1A in an assembled state.

[0021] FIG. 1C is an enlarged view of an area C shown in FIG. 1B.

[0022] FIG. 2 is a schematic diagram of a prior art process for milling a chamfer on an orbiting scroll as shown in FIGS. 1A to 1C.

[0023] FIG. 3A is a perspective view of an orbiting scroll according to an exemplary embodiment of the present disclosure.

[0024] FIG. 3B is a partial cross-sectional view taken along a cutting plane B shown in FIG. 3A.

[0025] FIG. 4 is a schematic diagram of a process for turning a chamfer on the orbiting scroll as shown in FIG. 3A.

DETAILED DESCRIPTION

[0026] A construction of a scroll assembly and a machining scheme for the scroll assembly in the prior art have been described in “BACKGROUND” with reference to FIGS. 1A-2. In the following, a construction and machining scheme according to the present disclosure will be described with reference to FIGS. 3A, 3B and 4.

[0027] FIG. 3A is a perspective view of an orbiting scroll according to an exemplary embodiment of the present disclosure. FIG. 3B is a partial cross-sectional view taken along a cutting plane B shown in FIG. 3A, wherein the cutting plane B is a plane passing through the central axis of the orbiting scroll.

[0028] Specifically, as shown in FIG. 3A and FIG. 3B, the orbiting scroll 1′ according to the exemplary embodiment of the present disclosure has substantially the same construction as the orbiting scroll 1 in the prior art described above, so the existing construction of the orbiting scroll 1′ will not be described again. The orbiting scroll 1′ of the present disclosure differs from the prior art in the following aspects (that is, the points in which the design idea of the present disclosure is embodied):

[0029] An annular groove 15 adapted for being formed by turning is provided on the lower surface 112 of the bottom plate 11 of the orbiting scroll 1′ of the present disclosure. A chamfer 151 is formed by a section of the annular groove 15 on the edge formed by the intersection of the circumferential vertical surface 141 of a positioning slot and the lower surface 112 of the bottom plate. In this way, the chamfer 141 formed by milling in the prior art can be replaced by the chamfer 151 formed by turning. That is to say, the section 151 of the annular groove 15 located on the edge formed by the intersection of the circumferential vertical surface 141 and the lower surface 112 can play the role of chamfering, while the remaining sections of the annular groove 15 do not affect the function of the orbiting scroll 1′.

[0030] In this way, the use of a milling tool and fixture for chamfering can be avoided. As a result, under the premise of realizing the same product function, the manufacturing and maintenance costs of the machining tool are reduced, and the machining quality and efficiency are improved. Taking the chamfer 151 of the orbiting scroll 1′ of the present disclosure as an example, the inventor learned through calculation that 49 seconds of machining time can be saved for a single piece compared to the existing milling machining scheme.

[0031] As shown in FIG. 3B, a cross section of the annular groove 15 is taken when the scroll surface of the orbiting scroll faces upwards, and the cross-sectional profile of the annular groove 15 may be “Λ” shaped. Specifically, the size of the annular groove 15 is set such that a chamfer 151 is formed on the edge of the annular groove 15 formed by the intersection of the circumferential vertical surface 141 of the positioning slot and the lower surface 112 of the bottom plate. The sizes of the annular groove 15 comprise the diameter of the neutral circle of the annular groove 15, the depth of the annular groove 15, the size of the opening of the annular groove 15, and the like. It should be understood that the diameter of the neutral circle of the annular groove 15 is equal to ½ of the sum of the diameter of the outer circumference of the annular groove 15 and the diameter of the inner circumference of the annular groove 15.

[0032] Optionally, the diameter of the neutral circle of the annular groove 15 is greater than the distance between the circumferential vertical surfaces 141 of the two positioning slots 14 in the radial direction of the orbiting scroll 1′, and the depth and the size of the opening of the annular groove 15 can ensure the edge formed by the intersection of the circumferential vertical surface 141 of a positioning slot and the lower surface 112 of the bottom plate is turned to form a chamfer 151. The chamfer 151 may be a 45° chamfer or a non-45° chamfer.

[0033] FIG. 4 is a schematic diagram of a process for turning a chamfer on the orbiting scroll as shown in FIG. 3A.

[0034] As shown in FIG. 4, the orbiting scroll 1′ is clamped by a chuck (not shown) of a turning tool and is rotated in the CX direction around its own central axis. The turning tool 6 comprises a tool body 61 and a tool tip 62. The tool tip 62 of the turning tool 6 turns the lower surface 112 of the bottom plate of the orbiting scroll 1′ when the orbiting scroll 1′ is rotated, whereby the annular groove 15 can be formed by turning. By appropriately setting/adjusting parameters such as the feed amount of the turning tool 6, the attitude of the turning tool, and the shape of the tool tip, the desired chamfer 151 can be finally obtained.

[0035] Although the technical object, technical solution and technical effect of the present disclosure have been described in detail above with reference to specific embodiments, it should be understood that the above-mentioned embodiments are only exemplary rather than restrictive. Within the essential spirit and principle of the present disclosure, any modifications, equivalent replacements, and improvements made by those skilled in the art are included within the protection scope of the present disclosure. For example, the chamfering machining solution in the present disclosure can also be applied to other applicable situations, and is not limited to the chamfering machining process of the positioning slots of the orbiting scroll of the scroll compressor.