Crankshaft for speed regulation compressor

Abstract

The utility model discloses a crankshaft for a speed regulating compressor, relates to the technical field of compressor parts, and is mainly used for solving the problem of poor body feeling of a user due to the fact that the existing crankshaft hears oil throwing sound during operation. The main structure comprises an eccentric shaft, a balance block and a long shaft which are sequentially connected from top to bottom, a main oil duct is arranged in the long shaft, a spiral oil groove communicated with the main oil duct is formed in the outer wall of the long shaft, an oil outlet groove is vertically formed in the side wall of the eccentric shaft, the upper end of the oil outlet groove is a blind end, and the lower end of the oil outlet groove extends to the lower end of the eccentric shaft. And only an eccentric oil duct for communicating the spiral oil groove with the oil outlet groove is arranged in the eccentric shaft. The utility model provides a crankshaft for a speed regulating compressor, which can effectively reduce oil throwing sound and improve the silence of equipment, thereby improving the body feeling of a user.

Description

TECHNICAL FIELD

[0001] The utility model relates to compressor parts technical field especially relates to a crankshaft for speed regulating compressor. BACKGROUND

[0002] Speed regulating compressor is one of the core components in the electric appliance refrigeration system, and its main function is to control the flow of refrigerant by adjusting the speed of the compressor, so as to achieve the purpose of temperature control. This technology is widely used in various fields and is an indispensable part of modern life.

[0003] At present, speed regulating compressor can be divided into open type compressor and closed type compressor according to its sealing structure.

[0004] Among them, the crankshaft main structure of closed type refrigeration compressor is composed of long shaft, eccentric shaft, balance block and oil way. When assembling, the long shaft of the crankshaft is placed in the main shaft hole of the cylinder body, and the eccentric shaft is connected with the connecting rod. When the compressor is powered on, the rotor drives the crankshaft to rotate, at this time, the refrigerator oil located at the bottom of the compressor shell will rise to the eccentric shaft through the centrifugal force generated by the rotation of the crankshaft, and then be thrown out to the inner wall of the shell from the eccentric shaft, so as to achieve the purpose of lubrication and cooling.

[0005] However, due to the high number of revolutions of the speed regulating compressor, the oiling amount is huge, and the existing crankshaft will hear oil throwing sound when running, which causes poor user experience. INVENTION CONTENTS

[0006] The utility model aims at providing a crankshaft for speed regulating compressor, which can effectively reduce the oil throwing sound, improve the equipment silence, and thus improve the user experience.

[0007] The technical scheme for solving the above technical problems of the utility model is as follows: a crankshaft for speed regulating compressor, which comprises an eccentric shaft, a balance block and a long shaft connected in sequence from top to bottom, a main oil channel is arranged in the long shaft, a spiral oil groove is arranged on the outer wall of the long shaft and communicated with the main oil channel, an oil outlet groove is vertically arranged on the side wall of the eccentric shaft, the upper end of the oil outlet groove is a blind end, and the lower end extends to the lower end of the eccentric shaft, and only an eccentric oil channel for connecting the spiral oil groove and the oil outlet groove is arranged in the eccentric shaft.

[0008] As a further improvement of the utility model, an oil outlet hole communicated with the output end of the eccentric oil channel is arranged in the oil outlet groove.

[0009] As a further improvement of the utility model, an oil inlet hole communicated with the input end of the eccentric oil channel is arranged at the upper end of the spiral oil groove.

[0010] As a further improvement of the utility model, an oil outlet hole communicated with the main oil channel is arranged at the lower end of the spiral oil groove.

[0011] As a further improvement of the utility model, the upper end face of the balance block is provided with a balance oil hole, and the balance oil hole is communicated with the main oil channel through a balance oil channel.

[0012] As a further improvement of the utility model, the upper end face of the eccentric shaft is further provided with a blind hole.

[0013] Advantages

[0014] Compared with the prior art, the crankshaft for a speed-regulating compressor has the following advantages:

[0015] 1. The crankshaft only throws oil through the oil outlet groove, that is, when the rotor of the compressor drives the crankshaft to rotate, the refrigeration oil located at the bottom of the compressor shell will sequentially pass through the main oil channel, the spiral oil groove and the eccentric oil channel from bottom to top by virtue of the centrifugal force generated by the rotating motion of the crankshaft, and then rise to the oil outlet groove on the side wall of the eccentric shaft; at this time, since the upper end of the oil outlet groove is a blind end and the lower end extends to the lower end of the eccentric shaft, the rising oil can only be sprayed out from the lower part of the eccentric shaft and cannot be directly sprayed onto the inner wall of the compressor shell, so that no obvious oil throwing sound is generated, thereby improving the quietness of the equipment and enhancing the user's sense of touch.

[0016] The utility model will become more clear through the following description and combining with the drawings, these drawings are used to explain the embodiment of the utility model. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical scheme in the embodiment of the utility model or prior art, the following will briefly introduce the drawings required to be used in the embodiment or prior art description, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without paying creative labor.

[0018] Figure 1 It is the structural schematic diagram of the utility model;

[0019] Figure 2 It is the perspective view of the utility model.

[0020] Wherein: 1-long axis;11-main oil channel;12-lower oil hole;13-spiral oil groove;14-upper oil hole;2-eccentric shaft;21-oil outlet hole;22-oil outlet groove;23-eccentric oil channel;3-balance block;31-balance oil hole;32-balance oil channel. DETAILED DESCRIPTION

[0021] To make the purpose, technical solutions, and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings. It is apparent that the embodiments described herein are merely a portion of the embodiments of the present invention, and not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are also within the scope of protection of the present invention.

[0022] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; of course, they can also refer to mechanical connections or electrical connections; in addition, they can also refer to direct connections, indirect connections through an intermediate medium, or internal connections between two components. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0023] Embodiments of the present invention will now be described with reference to the accompanying drawings.

[0024] Example

[0025] The specific implementation of the utility model is as follows Figures 1-2 As shown, a crankshaft for a speed regulating compressor ( Figure 1 The dashed line illustrates the obscured structure and the internal structure of the crankshaft. The crankshaft comprises, from top to bottom, an eccentric shaft 2, a balance weight 3, and a main shaft 1. Both the eccentric shaft 2 and the main shaft 1 are vertically straight shafts. A vertically extending main oil gallery 11 is located within the main shaft 1, while a spiral oil groove 13 is located on the outer wall of the main shaft 1, forming a spiral upward pattern. This spiral oil groove 13 communicates with the main oil gallery 11.

[0026] To reduce oil slinging noise, the crankshaft features a vertical oil outlet groove 22 on the sidewall of the eccentric shaft 2. The upper end of the oil outlet groove 22 is blind—that is, it does not penetrate the top of the eccentric shaft 2. Meanwhile, the lower end of the oil outlet groove 22 extends to the lower end of the eccentric shaft 2. Furthermore, the eccentric shaft 2 is provided with only an eccentric oil passage 23 connecting the spiral oil groove 13 and the oil outlet groove 22. In other words, the eccentric shaft 2 only delivers oil from the oil outlet groove 22.

[0027] When the crankshaft is used, the long shaft 1 is placed in the main shaft hole of the cylinder body, the eccentric shaft 2 is connected with the large end of the connecting rod, the small end of the connecting rod is connected with the piston, and the piston is placed in the cylinder hole of the cylinder body. When the compressor is in motion, the long shaft 1 performs rotary motion. The refrigeration oil at the bottom of the compressor shell will pass through the main oil channel 11, the spiral oil groove 13 and the eccentric oil channel 23 from bottom to top by virtue of the centrifugal force generated by the rotary motion of the crankshaft, and reach the oil outlet groove 22. In this process, part of the oil forms an oil film in the spiral oil groove 6 area, lubricating the friction between the crankshaft and the main shaft hole of the cylinder body; another part of the oil reaches the oil outlet groove 22 through the eccentric oil channel 23, and this part of the lubricating oil forms an oil film between the eccentric shaft 2 and the large end of the connecting rod, lubricating the wear between the eccentric shaft 2 and the large end of the connecting rod, and the oil splashed from the lower end of the oil outlet groove 22 is splashed to the small end of the connecting rod and the piston due to inertia, lubricating the small end of the connecting rod and the piston pin.

[0028] The crankshaft only splashes oil through the oil outlet groove 22, and since the upper end of the oil outlet groove 22 is a blind end and the lower end extends to the lower end of the eccentric shaft 2, the rising oil can only be sprayed out from the lower part of the eccentric shaft 2 and cannot be directly sprayed onto the inner wall of the compressor shell, so that there is no obvious oil splashing sound, thereby improving the quietness of the equipment and enhancing the user's experience.

[0029] In order to realize the communication between the oil outlet groove 22 and the eccentric oil channel 23, the crankshaft is provided with an oil outlet hole 21 in the oil outlet groove 22, which communicates with the output end of the eccentric oil channel 23. At the same time, in order to realize the communication between the spiral oil groove 13 and the input end of the eccentric oil channel 23, the crankshaft is provided with an oil inlet hole 14 at the upper end of the spiral oil groove 13, which communicates with the input end of the eccentric oil channel 23. Furthermore, in order to realize the communication between the spiral oil groove 13 and the main oil channel 11, the crankshaft is provided with an oil outlet hole 12 at the lower end of the spiral oil groove 13, which communicates with the main oil channel 11.

[0030] In this embodiment, the upper end surface of the balance block 3 is provided with a balance oil hole 31, and the balance oil hole 31 communicates with the main oil channel 11 through a balance oil channel 32.

[0031] In addition, in order to reduce the overall weight of the crankshaft, a blind hole is further arranged on the upper end surface of the eccentric shaft 2.

[0032] The above describes the utility model in combination with the best embodiment, but the utility model is not limited to the above disclosed embodiments, and should cover various modifications, equivalent combinations according to the essence of the utility model.

Claims

1. A crankshaft for a variable speed compressor, comprising an eccentric shaft (2), a balance block (3) and a long shaft (1) connected in order from top to bottom, a main oil passage (11) is arranged in the long shaft (1), and a spiral oil groove (13) in communication with the main oil passage (11) is arranged on the outer wall of the long shaft (1), characterized in that, The eccentric shaft (2) is vertically provided with an oil outlet groove (22) on the side wall, the upper end of the oil outlet groove (22) is a blind end, the lower end extends to the lower end of the eccentric shaft (2), and the eccentric shaft (2) is only provided with an eccentric oil channel (23) for connecting the spiral oil groove (13) and the oil outlet groove (22).

2. The crankshaft for a variable speed compressor of claim 1, wherein The oil outlet groove (22) is provided with an oil outlet hole (21) in communication with the output end of the eccentric oil channel (23).

3. The crankshaft for a variable speed compressor according to claim 1 or 2, characterized by The upper end of the spiral oil groove (13) is provided with an oil inlet hole (14) in communication with the input end of the eccentric oil channel (23).

4. The crankshaft for a variable speed compressor of claim 1, wherein The lower end of the spiral oil groove (13) is provided with an oil outlet hole (12) in communication with the main oil channel (11).

5. The crankshaft for a variable speed compressor of claim 1, wherein The upper end surface of the balance block (3) is provided with a balance oil hole (31), and the balance oil hole (31) and the main oil channel (11) are in communication through a balance oil channel (32).

6. The crankshaft for a variable speed compressor of claim 1, wherein The upper end surface of the eccentric shaft (2) is also provided with a blind hole.

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