Polishing device for reducing flow hysteresis resistance of crankshaft of scroll compressor

Abstract

The utility model relates to the technical field of crankshaft production equipment, in particular to a polishing device for reducing flow hysteresis resistance of a crankshaft of a scroll compressor, which comprises a polishing arm and a polishing tilting fillet, a mounting groove with an arc surface structure is arranged at the top end of the polishing tilting fillet, and the polishing device further comprises a plurality of groups of polishing components distributed in the mounting groove. The polishing assembly comprises a polishing block, a supporting base and an elastic supporting piece. The polishing block is fixedly arranged on the supporting base, and the upper end face of the polishing block and the mounting groove are concentrically arranged. The lower part of the supporting seat is rotationally connected with the polishing tile seat; the elastic supporting piece is arranged between the supporting seat and the polishing tile seat, the elastic supporting piece is fixedly connected with the supporting seat, and at least part of the elastic supporting piece abuts against the polishing tile seat. And the overall performance, energy efficiency and reliability of the scroll compressor are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to crankshaft production equipment technical field, and the specific field is a kind of polishing device for reducing scroll compressor crankshaft flow lag resistance. BACKGROUND

[0002] Reducing the flow lag resistance (i.e. the resistance loss of fluid when moving around the crankshaft) of scroll compressor crankshaft is a key measure to improve the overall performance, energy efficiency and reliability of the compressor. Its necessity mainly reflects in the following aspects: flow lag resistance will be converted into useless work (such as oil agitation, friction heat generation), directly increasing the input power of the compressor; lower flow lag resistance will make the lubricating oil flow smoothly, avoid dry friction or wear of shaft neck and bearing, delay lubricating oil aging, prolong the service life of parts; improve the stability of compressor operation, the optimized flow field can prevent lubricating oil from accumulating in the corner of crankcase, reduce the risk of liquid strike, etc. Based on this, to reduce the flow lag resistance of scroll compressor crankshaft, it is necessary to start from the optimization of scroll compressor crankshaft geometry, surface treatment, lubrication improvement, flow field design, etc. Among them, for the surface treatment of scroll compressor crankshaft, the existing method is mostly mirror polishing (Ra≤0.1 μm) on the surface of shaft neck to reduce friction resistance, and mirror polishing needs to use polishing device.

[0003] The prior art such as the patent with the announcement number CN209615139U discloses a crankshaft polishing machine polishing pad, which improves the polishing effect by setting multiple polishing blocks on the polishing pad seat, but in actual use, due to the fixed setting of the polishing blocks, it is difficult to avoid the occurrence of local over-grinding or insufficient polishing caused by uneven pressure. UTILITY MODEL CONTENTS

[0004] In view of the deficiencies of the prior art, the purpose of the utility model is to provide a polishing device for reducing the flow lag resistance of scroll compressor crankshaft, which can improve the polishing effect of the crankshaft, further reduce the flow lag resistance of the scroll compressor crankshaft, and improve the overall performance, energy efficiency and reliability of the scroll compressor.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a polishing device for reducing the flow lag resistance of scroll compressor crankshaft, comprising a polishing arm and a polishing pad seat, the top end part of the polishing pad seat is provided with a mounting groove with a circular arc surface structure, and the polishing device further comprises multiple polishing assemblies distributed in the mounting groove; the polishing assembly comprises a polishing block, a support seat and an elastic support sheet; the polishing block is fixedly arranged on the support seat, and the upper end surface of the polishing block is concentrically arranged with the mounting groove; the lower part of the support seat is rotationally connected with the polishing pad seat; the elastic support sheet is arranged between the support seat and the polishing pad seat, wherein the elastic support sheet is fixedly connected with the support seat, and the elastic support sheet is at least partially in contact with the polishing pad seat.

[0006] Preferably, the elastic supporting sheet is in an arc plate structure, and the bending direction of the elastic supporting sheet is opposite to the bending direction of the mounting groove.

[0007] Preferably, a plurality of sliding grooves corresponding to the polishing components are arranged in the mounting groove; the supporting seat is composed of a rotating shaft, connecting plates and a supporting plate, the connecting plates are arranged between the rotating shaft and the supporting plate, the elastic supporting sheet is arranged through the gap between the two connecting plates, the polishing block is fixed on the supporting plate, and the rotating shaft is arranged in the sliding groove.

[0008] Preferably, the opening width of the sliding groove is smaller than the diameter of the rotating shaft.

[0009] Preferably, the sliding groove is an optimal arc groove with a central angle of 240°-300°.

[0010] Preferably, the sliding groove is provided with a baffle at one end of the length, and a through hole is arranged in the baffle; the polishing device further comprises a limiting screw, and the screw rod of the limiting screw is arranged in the through hole and fixed to one end of the rotating shaft.

[0011] Preferably, the limiting screw is threadedly connected or inserted with the rotating shaft.

[0012] Preferably, the polishing device further comprises a connecting screw, and the polishing block and the elastic supporting sheet are fixed to the supporting seat through the connecting screw.

[0013] Preferably, the elastic supporting sheet is made of rubber or metal.

[0014] Preferably, the central angle of the elastic supporting sheet ranges from 60° to 90°.

[0015] Compared with the prior art, the polishing device has the advantages that: a plurality of polishing blocks supported by the supporting seat are arranged on the polishing tile seat, the supporting seat is rotationally connected with the polishing tile seat, the elastic supporting sheet is arranged between the supporting seat and the polishing tile seat, the polishing block can slightly float with the eccentric motion of the crankshaft, the radial deviation is automatically compensated, the pressure concentration caused by rigid contact is avoided, the polishing effect of the surface of the crankshaft is improved, the flow resistance of the crankshaft of the scroll compressor is reduced, and the overall performance, energy efficiency and reliability of the scroll compressor are improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 FIG. 1 is a front side structure schematic view of the polishing tile seat of the present application;

[0017] Figure 2 FIG. 2 is a rear side structure schematic view of the polishing tile seat of the present application;

[0018] Figure 3The polishing tile seat is a whole structure schematic view of the utility model.

[0019] Figure 4 The polishing assembly is a structure schematic view of the utility model.

[0020] Figure 5 The polishing assembly is a structure schematic view of the utility model.

[0021] In the figure: 1 polishing tile seat, 2 polishing block, 3 support seat, 4 elastic support sheet, 5 connecting screw, 6 limiting screw, 11 sliding slot, 12 through hole, 31 rotating shaft, 32 connecting plate, 33 supporting plate, 34 gap. DETAILED DESCRIPTION

[0022] The specific embodiments of the utility model are described in detail below in combination with the drawings, so that those skilled in the art can more clearly understand how to practice the utility model. Although the utility model is described in combination with its preferred specific embodiments, these embodiments are only illustrative, not limiting the scope of the utility model.

[0023] Referring to Figures 1-5 In an embodiment of the utility model, a polishing device for reducing the flow drag resistance of a crankshaft of a scroll compressor, the polishing device appears in pairs during polishing, and the crankshaft is clamped between the two polishing devices; the polishing device comprises a polishing arm (not shown in the figure), a polishing tile seat 1 and a plurality of polishing assemblies, the polishing tile seat 1 is installed on the polishing arm, and the installation can be carried out in a detachable connection mode; an installation groove with a circular arc surface structure is formed at the top end of the polishing tile seat 1, and the plurality of polishing assemblies are uniformly distributed in the installation groove; the circular arc surface structure can make the plurality of polishing assemblies simultaneously fit the polishing surface of the crankshaft, thereby improving the polishing effect.

[0024] A plurality of sliding slots 11 for quick installation of the polishing assemblies are formed in the installation groove of the polishing tile seat 1, and the sliding slots 11 are optimal arc slots with a central angle of 240°-300°.

[0025] The polishing assembly comprises a polishing block 2, a support seat 3, an elastic support sheet 4 and a connecting screw 5, the polishing block 2 and the elastic support sheet 4 are fixed on the support seat 3 through the connecting screw 5, wherein the polishing block 2 is located at the top end of the support seat 3, and the elastic support sheet 4 is located at the middle part of the support seat 3.

[0026] Specifically, the support seat 3 comprises a rotating shaft 31, a connecting plate 32 and a supporting plate 33 with consistent length directions, the connecting plate 32 is provided with two pieces, and the supporting plate 33 is fixed at the top end of the rotating shaft 31 through the two connecting plates 32, wherein the two connecting plates 32 are arranged at intervals between the rotating shaft 31 and the supporting plate 33, and at this time, a gap 34 is formed between the two connecting plates 32; the elastic support sheet 4 is arranged in sliding penetration through the gap 34.

[0027] Further, in the embodiment, the opening width of the sliding slot 11 is less than the diameter of the rotating shaft 31, and the rotating shaft 31 is in sliding connection with the sliding slot 11. After the rotating shaft 31 is arranged in the sliding slot 11, the sliding slot 11 allows the rotating shaft 31 to rotate and axially slide in the sliding slot 11 due to the structural limiting, but limits the rotating shaft 31 from being radially separated from the sliding slot 11. Through the simple structure, the polishing assembly can be quickly assembled on the polishing tile seat 1, and the polishing efficiency is improved.

[0028] The polishing block 2 is fixedly arranged on the supporting plate 33. The polishing block 2 comprises a base plate and a polishing layer. The base plate can not only provide stable adhesion for the polishing layer, but also improve the structural strength of the polishing block 2 as a whole, thereby providing a basis for the fixed connection of the polishing block 2 and other components. In order to better polish the crankshaft, the upper end surface of the polishing layer is in an arc structure.

[0029] The elastic supporting sheet 4 is in an arc plate structure as a whole, and the central angle of the arc plate structure can be selected as 60°-90°.

[0030] After assembly, the inner arc of the elastic supporting sheet 4 faces the mounting groove, and the outer arc of the elastic supporting sheet 4 faces away from the supporting plate 33, that is, the bending direction of the elastic supporting sheet 4 is opposite to the bending direction of the mounting groove. In the initial state, the two ends of the elastic supporting sheet 4 perpendicular to the axial direction of the rotating shaft 31 abut against the inner wall of the mounting groove, that is, the two ends of the elastic supporting sheet 4 in the length direction abut against the inner wall of the mounting groove, so that the axis of the connecting screw 5 is the same as the radial direction of the mounting groove. At this time, the upper end surface of the polishing block 2 is in the concentric position with the mounting groove. During polishing, the two polishing devices clamp the crankshaft, and the polishing block 2 can slightly float with the eccentric motion of the crankshaft under the support of the supporting seat 3 and the elastic supporting sheet 4, thereby automatically compensating the radial deviation, avoiding the pressure concentration caused by rigid contact, and improving the polishing effect.

[0031] Further, in order to adapt to the floating caused by the eccentric motion of different crankshafts, the elastic supporting sheet 4 can be made of rubber or metal.

[0032] In an embodiment, in order to further limit the axial sliding of the rotating shaft 31 from the sliding slot 11, one end of the sliding slot 11 is provided with a baffle, and a through hole 12 is formed in the baffle. The polishing assembly further comprises a limiting screw 6. The screw rod of the limiting screw 6 is slidably penetrated through the through hole 12 and detachably connected with one end of the baffle corresponding to the rotating shaft 31. The detachable connection can adopt threaded connection or plug-in connection with quick release function. In the embodiment, the limiting screw 6 is in threaded connection with the rotating shaft 31 based on reliability.

[0033] By the technical scheme, the polishing blocks supported by the supporting seats are arranged on the polishing tile, the supporting seat is rotationally connected with the polishing tile, and the elastic supporting pieces for returning are arranged between the supporting seat and the polishing tile; when the crankshaft is polished by using the polishing device, the polishing blocks can slightly float with the eccentric motion of the crankshaft, the radial deviation is automatically compensated, the pressure concentration caused by the rigid contact is avoided, the polishing effect of the surface of the crankshaft is improved, the flow lag resistance of the crankshaft of the scroll compressor is reduced, and the overall performance, energy efficiency and reliability of the scroll compressor are improved.

[0034] Finally, it should be pointed out that the above embodiments are only used to illustrate the technical scheme of the present application and are not limiting. Although the present application has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical scheme of the present application can be modified or replaced equivalently without departing from the purpose and scope of the technical scheme of the present application, and all should be covered in the scope of the claims of the present application.

Claims

1. A polishing device for reducing the flow resistance of a scroll compressor crankshaft, comprising a polishing arm and a polishing shoe (1), wherein the top end of the polishing shoe (1) is provided with a circular arc surface structure mounting groove, characterized in that: The polishing device further comprises a plurality of polishing assemblies distributed in the mounting groove; the polishing assembly comprises a polishing block (2), a support seat (3) and an elastic support sheet (4); the polishing block (2) is fixedly arranged on the support seat (3), and the upper end surface of the polishing block (2) is concentrically arranged with the mounting groove; the lower part of the support seat (3) is rotationally connected with the polishing tile seat (1); the elastic support sheet (4) is arranged between the support seat (3) and the polishing tile seat (1), wherein the elastic support sheet (4) is fixedly connected with the support seat (3), and the elastic support sheet (4) at least partially abuts against the polishing tile seat (1).

2. A polishing device for reducing flow resistance of a crankshaft of a scroll compressor according to claim 1, wherein: The elastic support sheet (4) is in an arc plate structure, and the bending direction of the elastic support sheet (4) is opposite to the bending direction of the mounting groove.

3. A polishing device for reducing flow resistance of a crankshaft of a scroll compressor according to claim 2, wherein: A plurality of sliding grooves (11) corresponding to the polishing assemblies are arranged in the mounting groove; the support seat (3) is composed of a rotating shaft (31) with the same length direction, a connecting plate (32) and a supporting plate (33); the connecting plate (32) is provided with two connecting plates (32) which are arranged between the rotating shaft (31) and the supporting plate (33) at intervals; the elastic support sheet (4) is arranged through the gap between the two connecting plates (32); the polishing block (2) is fixedly arranged on the supporting plate (33); and the rotating shaft (31) is slidingly arranged in the sliding groove (11).

4. A polishing device for reducing flow resistance of a crankshaft of a scroll compressor according to claim 3, wherein: The opening width of the sliding groove (11) is smaller than the diameter of the rotating shaft (31).

5. A polishing device for reducing flow resistance of a crankshaft of a scroll compressor according to claim 4, wherein: The sliding groove (11) is an optimal arc groove with a central angle of 240°-300°.

6. A polishing device for reducing flow resistance of a crankshaft of a scroll compressor according to claim 3, wherein: One end of the sliding groove (11) is provided with a baffle, and a through hole (12) is arranged on the baffle; the polishing assembly further comprises a limiting screw (6); the screw rod of the limiting screw (6) slidingly penetrates the through hole (12) and is fixedly connected with one end of the rotating shaft (31).

7. A polishing device for reducing flow resistance of a crankshaft of a scroll compressor according to claim 6, wherein: The limiting screw (6) and the rotating shaft (31) are threadedly connected or inserted.

8. A polishing device for reducing flow resistance of a crankshaft of a scroll compressor according to claim 3, wherein: The polishing device further comprises a connecting screw (5); the polishing block (2) and the elastic support sheet (4) are fixedly connected with the support seat (3) through the connecting screw (5).

9. A polishing device for reducing flow resistance of a crankshaft of a scroll compressor according to claim 1, wherein: The elastic support sheet (4) is made of rubber or metal.

10. A polishing device for reducing flow resistance of a crankshaft of a scroll compressor according to claim 2, wherein: The central angle of the elastic support sheet (4) ranges from 60° to 90°.

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