Crankshaft oil guide assembly and compressor

Abstract

The application provides a crankshaft oil guide assembly and a compressor. The crankshaft oil guide assembly comprises a crankshaft, an oil suction pipe and a spiral vane. The crankshaft has a central oil hole, one end of the oil suction pipe is installed in the central oil hole, and the spiral vane is inserted into the oil suction pipe. The end of the spiral vane is a split structure, the contact surface between the split structure and the inner diameter of the oil suction pipe is designed in an interference manner, the other end of the oil suction pipe is provided with a limiting structure and two symmetrical grooves, the grooves are used for adjusting the insertion angle of the oil suction pipe by cooperating with an assembly tool, and the limiting structure is used for limiting the circumferential freedom degree of the spiral vane relative to the oil suction pipe. In the crankshaft oil guide assembly and the compressor provided in the application, the spiral vane with a split tail is adopted, the corresponding limiting structure is arranged on the oil suction pipe, so that the spiral vane cannot rotate freely in the oil suction pipe, and the grooves are arranged at the end of the oil suction pipe to adjust the insertion angle of the oil suction pipe by cooperating with the assembly tool. Therefore, the installation and positioning of the spiral vane are more convenient and more accurate.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of compressors, in particular to a crankshaft oil guide assembly and a compressor. BACKGROUND

[0002] In the existing refrigeration compressor, whether it is a reciprocating piston compressor, a rotary piston compressor or a scroll compressor, the centrifugal oil feeding mode with a spiral vane installed in the central oil hole of the crankshaft has more advantages than the oil pump oil feeding mode, and is the mainstream structure at present. With the expansion of rotary compressors to different fields, the displacement range of rotary compressors is getting larger and larger, and the lubrication environment of large-displacement rotary compressors is more severe, and the requirement for pump oil lubrication is getting higher and higher. Since the angle between the oil outlet hole at the upper part of the shaft system and the spiral vane greatly affects the oil outlet amount, the spiral vane needs to be installed at an optimal angle.

[0003] At present, the centrifugal oil feeding structure adopted by the industry generally adopts interference fit, which has the problems of the need for special processing equipment and professional installation personnel, low qualified rate and inability to guarantee installation accuracy. In addition, the tail end of the spiral vane is generally designed as a forked structure in the prior art, and since the forked structure is not easy to fix, the installation is relatively difficult, and it is impossible to guarantee that the installation angle of the spiral vane reaches the optimal angle. SUMMARY

[0004] In view of the defects in the prior art, the purpose of the present application is to provide a crankshaft oil guide assembly and a compressor, which overcome the difficulties of the prior art and can improve the installation accuracy and installation convenience of the spiral vane.

[0005] According to one aspect of the present application, a crankshaft oil guide assembly is provided, which comprises a crankshaft, an oil suction pipe and a spiral vane.

[0006] The inside of the crankshaft has a central oil hole provided through in the axial direction, the first end and the second end of the oil suction pipe are both provided with openings, wherein the first end is used for connecting with the central oil hole, and the spiral vane is inserted into the oil suction pipe through the first end.

[0007] Among them, the tail end of the spiral vane is a forked structure, the contact surface between the forked structure and the inner diameter of the oil suction pipe is designed with interference, the second end opening of the oil suction pipe is provided with two grooves, the two grooves are symmetrically arranged and extend in the radial direction, and are used for adjusting the insertion angle of the oil suction pipe by cooperating with a fitting tool, and a limiting structure is further arranged at the second end of the oil suction pipe, which is used for limiting the circumferential degree of freedom of the spiral vane relative to the oil suction pipe.

[0008] Optionally, in the crankshaft oil guide assembly, the limiting structure is the two grooves of the oil suction pipe, and the forked structure of the spiral vane is respectively clamped in the two grooves of the oil suction pipe.

[0009] Optionally, in the crankshaft oil guide assembly, the limiting structure is two protrusions formed by outward protruding of the wall of the oil suction pipe, the two protrusions are symmetrically arranged, and the bifurcated structure of the spiral vane is respectively clamped in the grooves formed by the two protrusions.

[0010] Optionally, in the crankshaft oil guide assembly, the limiting structure is a plurality of recessed ribs formed by interval recessing of the wall of the oil suction pipe, the plurality of recessed ribs have slits therebetween, and the bifurcated structure of the spiral vane is respectively clamped in the slits.

[0011] Optionally, in the crankshaft oil guide assembly, the oil suction pipe comprises a cylindrical segment and a circular frustum segment connected, the first end is arranged at the cylindrical segment, the second end is arranged at the circular frustum segment, and the two grooves are arranged on the circular frustum segment.

[0012] Optionally, in the crankshaft oil guide assembly, the outer side of the bifurcated structure is inclined outward at a certain angle relative to the central axis of the spiral vane and forms a sharp angle at the terminal end.

[0013] According to another aspect of the present application, a mounting tool applied to the crankshaft oil guide assembly is provided, the mounting tool comprises a base and a flat sheet structure protruding from the base.

[0014] When the oil suction pipe is placed on the mounting tool, the flat sheet structure is inserted into the two grooves of the oil suction pipe, so as to limit the installation angle of the spiral vane in the oil suction pipe relative to the crankshaft.

[0015] According to another aspect of the present application, a compressor is provided, the compressor comprises the crankshaft oil guide assembly.

[0016] In the crankshaft oil guide assembly and the compressor provided by the present application, the spiral vane with a bifurcated tail is adopted, and the corresponding limiting structure is arranged on the oil suction pipe, so that the spiral vane cannot rotate freely in the oil suction pipe, and the grooves are arranged at the terminal end of the oil suction pipe to cooperate with the mounting tool to adjust the insertion angle of the oil suction pipe, so that the installation and positioning of the spiral vane are more convenient and accurate, and the oiling effect of the spiral vane can be ensured, thereby improving the reliability of the compressor. BRIEF DESCRIPTION OF DRAWINGS

[0017] The technical solutions of the present application will be described in detail below in combination with the drawings and specific embodiments, so that the characteristics and advantages of the present application are more obvious.

[0018] Figure 1 FIG. 1 is a front view of the oil suction pipe of the embodiment of the present application;

[0019] Figure 2 Right view of the oil suction pipe of the embodiment of the present application;

[0020] Figure 3 Structure schematic view of the spiral vane of the embodiment of the present application;

[0021] Figure 4 Front view of the spiral vane of the embodiment of the present application installed in the oil suction pipe;

[0022] Figure 5 Right view of the spiral vane of the embodiment of the present application installed in the oil suction pipe;

[0023] Figure 6 Front view of the oil suction pipe of the embodiment of the present application when cooperating with the assembly tool;

[0024] Figure 7 Right view of the oil suction pipe of the embodiment of the present application when cooperating with the assembly tool;

[0025] Figure 8 Front view of the crankshaft of the embodiment of the present application;

[0026] Figure 9 Right view of the crankshaft of the embodiment of the present application;

[0027] Figure 10 Right view of the crankshaft oil guide assembly of the embodiment of the present application;

[0028] Figure 11 Front view of the oil suction pipe of another embodiment of the present application;

[0029] Figure 12 Right view of the oil suction pipe of another embodiment of the present application;

[0030] Figure 13 Front view of the oil suction pipe of yet another embodiment of the present application;

[0031] Figure 14 Right view of the oil suction pipe of yet another embodiment of the present application. DETAILED DESCRIPTION

[0032] The embodiments of the present application will be described in detail below. Although the present application will be described and explained with reference to the embodiments, it is to be noted that the application is not limited to these embodiments. Rather, modifications and / or equivalents should become apparent to those skilled in the art after having the benefit of this disclosure.

[0033] In addition, for a better understanding of the present application, numerous specific details are given in the following detailed description. One skilled in the art will understand that the application can be practiced without these specific details. In some instances, well-known structures and components are not described in detail in order to emphasize the principles of the application.

[0034] The technical solutions of the present application are described in detail below in combination with the drawings and specific examples, so that the characteristics and advantages of the present application are more obvious.

[0035] Please refer to Figures 1 to 7 , which is a structural schematic diagram of a crankshaft oil guide assembly according to an embodiment of the present application. As shown in Figures 1 to 7 , the crankshaft oil guide assembly 10 comprises a crankshaft (not shown in the figure), an oil suction pipe 1 and a spiral vane 2. The crankshaft has a central oil hole (not shown in the figure) extending through the inside of the crankshaft in the axial direction. The first end and the second end of the oil suction pipe 1 are both provided with openings, wherein the first end is used to connect with the central oil hole. The spiral vane 2 is inserted into the oil suction pipe 1 through the first end. The end of the spiral vane 2 is a split structure 2a. The contact surface between the split structure 2a and the inner diameter of the oil suction pipe 1 is designed with interference. Two grooves 1a are provided at the opening of the second end of the oil suction pipe 1, which are symmetrically arranged and extend in the radial direction, used to adjust the insertion angle of the oil suction pipe 1 by cooperating with a fitting tool 3. A limiting structure is further provided at the second end of the oil suction pipe 1, which is used to limit the circumferential degree of freedom of the spiral vane 2 relative to the oil suction pipe 1.

[0036] Specifically, the crankshaft has a central oil hole extending in the axial direction of the crankshaft. The oil suction pipe 1 is installed below the crankshaft and arranged in the axial direction of the crankshaft. One end (i.e. the first end) of the oil suction pipe 1 extends into the central oil hole, and the oil suction pipe 1 is in communication with the central oil hole.

[0037] As shown in Figure 4 , the oil suction pipe 1 comprises a cylindrical segment and a circular truncated cone segment connected together. The first end is provided at the cylindrical segment, and the second end is provided at the circular truncated cone segment. The two grooves are provided on the circular truncated cone segment. One end (i.e. the end) of the spiral vane 2 is a split structure 2a. The outer side of the split structure 2a is inclined outward at a certain angle relative to the central axis of the spiral vane 2 and forms a sharp corner at the end. Since the contact surface between the split structure 2a and the inner diameter of the oil suction pipe 1 is designed with interference, the tail end sharp corner of the split structure 2a of the spiral vane 2 slides into the symmetrically arranged grooves 1a to form a limit after being inserted into the oil suction pipe 1.

[0038] In the embodiment, the second end of the oil suction pipe 1 is provided with a limiting structure, i.e., two symmetrical grooves 1a, and the split structure of the spiral fin 2 is clamped in the two grooves, and cannot rotate relative to the oil suction pipe 1.

[0039] Correspondingly, the assembly tool of the oil suction pipe 1 is designed as a convex flat sheet structure. Figure 6 and Figure 7 As shown in FIGS. 3 and 4, the assembly tool 3 includes a base (not shown in the figure) and a flat sheet structure (not shown in the figure) protruding from the base, and when the oil suction pipe 1 is placed on the assembly tool 3, the flat sheet structure is inserted into the two grooves of the oil suction pipe 1, and rotating the assembly tool 3 can adjust the insertion angle of the oil suction pipe 1, thereby ensuring the installation angle of the spiral fin 2 in the oil suction pipe 1.

[0040] Please refer to FIGS. 3 and 4. Figures 6 to 10 As shown in FIG. 4, a key groove 4a is formed at the top end of the long axis of the crankshaft 4, and the key groove 4a is used to realize the positioning of the crankshaft 4 and the compressor rotor (not shown in the figure), and according to the design angle θ of the tail end sharp corner and the tail rotation starting position of the spiral fin 2, the installation angle of the spiral fin 2 can be ensured, and the installation angle is the included angle α between the tail rotation starting straight edge and the key groove 4a.

[0041] In the crankshaft oil guide assembly 10 provided in the embodiment, since the limiting structure of the oil suction pipe 1 cooperates with the split structure 2a of the spiral fin 2 to form positioning, and the oil suction pipe 1 is provided with grooves for cooperating with the assembly tool 3 to adjust the insertion angle of the oil suction pipe 1, the installation of the spiral fin 2 is more convenient, the positioning angle is more accurate, the defective rate can be reduced or even eliminated, the oiling effect of the spiral fin 2 is ensured, the lubrication of the pump body friction pair is improved, and the reliability of the whole machine is improved.

[0042] Correspondingly, the embodiment also provides a compressor, which includes the crankshaft oil guide assembly 10 as described above. For details, please refer to the above, which will not be described here.

[0043] In other embodiments, the limiting structure provided at the end of the oil suction pipe 1 can also be other structures, instead of directly clamping the split structure of the spiral fin 2 with the grooves 1a.

[0044] Please refer to FIGS. 3 and 4. Figure 11 and Figure 12In another embodiment, the second end of the oil suction pipe 1 is provided with two protruding structures 1b, which are outwardly protruding from the pipe wall of the oil suction pipe 1 and symmetrically arranged, for limiting the circumferential degree of freedom of the spiral fin 2 relative to the oil suction pipe 1. The protruding structure 1b serves as a limiting structure at the end of the oil suction pipe 1. When the spiral fin 2 is inserted into the oil suction pipe 1, the bifurcated structure 2a of the spiral fin 2 can slide into the protruding structure 1b. Since the contact surface between the bifurcated structure 2a and the inner diameter of the oil suction pipe 1 is designed with an interference, the bifurcated structure 2a is clamped in the groove formed by the protruding structure 1b and cannot move, thereby fixing the position of the spiral fin 2.

[0045] Please refer to Figure 13 and Figure 14 In yet another embodiment, the second end of the oil suction pipe 1 is provided with a plurality of recessed ribs 1c, which are formed by recessing the pipe wall of the oil suction pipe 1 inwardly and are spaced apart. Adjacent recessed ribs 1c have a slit (not shown in the figure) therebetween, for limiting the circumferential degree of freedom of the spiral fin 2 relative to the oil suction pipe 1. The plurality of recessed ribs 1c serve as a limiting structure at the end of the oil suction pipe 1. When the spiral fin 2 is inserted into the oil suction pipe 1, the bifurcated structure 2a of the spiral fin 2 can slide into the slit of the plurality of recessed ribs 1c. Since the contact surface between the bifurcated structure 2a and the inner diameter of the oil suction pipe 1 is designed with an interference, the bifurcated structure 2a is clamped in the slit and cannot move, thereby fixing the position of the spiral fin 2.

[0046] In summary, the crankshaft oil guide assembly and the compressor of the present application adopt a spiral fin with a bifurcated tail, and a corresponding limiting structure is arranged on the oil suction pipe, so that the spiral fin cannot rotate freely in the oil suction pipe. A groove is arranged at the end of the oil suction pipe to cooperate with a fitting tool to adjust the insertion angle of the oil suction pipe. Therefore, the installation and positioning of the spiral fin are more convenient and accurate, the oiling effect of the spiral fin can be ensured, and the reliability of the compressor as a whole can be improved.

[0047] The above is a further detailed description of the present application in combination with specific preferred embodiments, and the specific implementation of the present application should not be limited to these descriptions. For ordinary skilled persons in the technical field to which the present application belongs, a number of simple deductions or substitutions can be made without departing from the concept of the present application, and all of these should be considered as falling within the protection scope of the present application.

Claims

1. A crankshaft oil deflector assembly characterized by, The crankshaft, the oil suction pipe and the helical vane are included. The crankshaft has a central oil hole penetrating through in the axial direction, the first end and the second end of the oil suction pipe are both provided with openings, wherein the first end is used for connecting with the central oil hole, and the helical vane is inserted into the oil suction pipe through the first end. The end of the helical vane is a split structure, the contact surface between the split structure and the inner diameter of the oil suction pipe is designed in interference, two grooves are provided at the opening of the second end of the oil suction pipe, the two grooves are symmetrically arranged and extend in the radial direction, are used for adjusting the insertion angle of the oil suction pipe by cooperating with the assembly tool, and a limiting structure is further arranged at the second end of the oil suction pipe, and the limiting structure is used for limiting the circumferential degree of freedom of the helical vane relative to the oil suction pipe; the assembly tool includes a base and a flat sheet structure protruding on the base; when the oil suction pipe is placed on the assembly tool, the flat sheet structure is inserted into the two grooves of the oil suction pipe, and is used for limiting the installation angle of the helical vane in the oil suction pipe to the crankshaft; the oil suction pipe includes a connected cylindrical segment and a circular truncated cone segment, the first end is arranged at the cylindrical segment, the second end is arranged at the circular truncated cone segment, and the two grooves are arranged on the circular truncated cone segment; the outer side of the split structure is inclined outward at a certain angle relative to the central axis of the helical vane and forms a sharp angle at the end; The limiting structure is two protruding structures protruding outward from the wall of the oil suction pipe, the two protruding structures are symmetrically arranged, and the split structure of the helical vane is respectively clamped in the grooves formed by the two protruding structures; or, The limiting structure is a plurality of recessed ribs formed by the wall of the oil suction pipe being recessed at intervals, the plurality of recessed ribs have slits therebetween, and the split structure of the helical vane is respectively clamped in the slits. The assembly tool includes a base and a flat sheet structure protruding on the base; 2. An assembly tool for the oil guide assembly of claim 1, characterized in that, When the oil suction pipe is placed on the assembly tool, the flat sheet structure is inserted into the two grooves of the oil suction pipe, and is used for limiting the installation angle of the helical vane in the oil suction pipe to the crankshaft. The crankshaft oil guide assembly.

3. A compressor characterized by, The crankshaft oil guide assembly of claim 1. ​

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