Refrigeration compressor crankshaft capable of reducing resistance

Abstract

The utility model relates to the technical field of refrigeration compressors, and discloses a refrigeration compressor crankshaft capable of reducing resistance, which comprises a crankshaft and a balance block, the balance block is fixedly arranged on the shaft wall of the crankshaft, and both sides of the balance block are arranged by adopting curved surfaces; a containing groove is formed in the side wall of the balance block, and a weight attaching strip is detachably arranged in the containing groove. According to the utility model, the resistance of the balance block can be reduced, the weight of the balance block can be changed, the rotating centrifugal degree of the crankshaft is reduced, and the rotating stability of the crankshaft is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of refrigeration compressors, in particular to a refrigeration compressor crankshaft with reduced resistance. Background Art

[0002] The crankshaft is responsible for bearing the force transmitted from the connecting rod, converting it into torque which is output through the crankshaft and drives other accessories on the engine. The crankshaft is subjected to the combined effects of the centrifugal force of the rotating mass, the periodically changing gas inertia force and the reciprocating inertia force, causing the crankshaft to be subjected to bending and torsional loads. Crankshaft structures are often used in piston refrigeration compressors. The crankshaft balance block of this structure has flat surfaces on both sides, which creates great resistance when the crankshaft is running at high speeds.

[0003] For example, patent number CN217873746U discloses a refrigeration compressor crankshaft with reduced resistance, including a drive shaft and a balancing block, the balancing block including table top one and table top two, the table top one and table top two are of integral structure, the middle portion of the table top two is fixedly connected to the drive shaft, the table top two can drive the table top one to rotate around the drive shaft, an inner recess is provided between the table top one and the table top two, and an inclined surface or chamfer is provided between the upper end surface and the lower end surface of the inner recess.

[0004] In the above scheme, by using bevels or rounded corners on both sides of the balancing block, the resistance of the balancing block during rotation can be reduced. However, in actual use, the centrifugal force of the crankshaft will vary, so the weight of the balancing block to be used needs to be adjusted, but the weight of the balancing block at this stage cannot be adjusted. Therefore, a refrigeration compressor crankshaft with reduced resistance is proposed. Utility Model Content

[0005] The utility model aims to solve the problems raised by the background technology and provides a refrigeration compressor crankshaft with reduced resistance.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A refrigeration compressor crankshaft with reduced resistance comprises a crankshaft and a balancing block, wherein the balancing block is fixedly mounted on the shaft wall of the crankshaft, and both sides of the balancing block are provided with curved surfaces; a placement groove is provided on the side wall of the balancing block, and a removable weight strip is provided inside the placement groove.

[0008] Preferably, insert sleeves are fixedly provided on both sides of the placement groove, and the two ends of the weight-attached strip are respectively inserted into the inside of the two insert sleeves.

[0009] Preferably, the additional weight bar is an elastic stainless steel bar.

[0010] Preferably, both ends of the additional weight bar are provided with pointed structures.

[0011] Preferably, the number of the placement slots and the number of the weight bars are both three.

[0012] Preferably, the socket and the balancing weight are integrally formed.

[0013] Compared with the prior art, the utility model provides a refrigeration compressor crankshaft with reduced resistance, which has the following beneficial effects:

[0014] 1. The refrigeration compressor crankshaft with reduced resistance has a plurality of weight bars arranged on a balancing block. When the degree of eccentricity of the crankshaft changes, the number of weight bars installed on the balancing block can be adjusted so that the crankshaft can rotate smoothly.

[0015] 2. The refrigeration compressor crankshaft with reduced resistance has sleeves arranged on both sides of the placement groove, and the two ends of the weight bar can be inserted into the inside of the sleeves on both sides, so that the weight bar can be arranged in close contact with the side wall of the placement groove, and the weight bar can be easily removed from the inside of the placement groove.

[0016] The parts not involved in the device are the same as the existing technology or can be implemented by using the existing technology. The utility model can not only reduce the resistance of the balance block, but also change the weight of the balance block, reduce the degree of centrifugal rotation of the crankshaft, and improve the stability of the crankshaft rotation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic structural diagram of a refrigeration compressor crankshaft for reducing resistance proposed by the utility model;

[0018] Figure 2 for Figure 1 A magnified view of the structure of the local A part;

[0019] Figure 3 for Figure 1 Side view of the medium balance weight.

[0020] In the figure: 1. crankshaft; 2. balance block; 3. placement groove; 4. additional weight bar; 5. sleeve. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0022] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0023] Reference Figure 1 and 3 A refrigeration compressor crankshaft with reduced resistance includes a crankshaft 1 and a balancing block 2. The balancing block 2 is fixedly mounted on the shaft wall of the crankshaft 1. Both sides of the balancing block 2 are provided with curved surfaces. The curvature of the curved surfaces can reduce the resistance of the balancing block 2 during rotation. A placement groove 3 is provided on the side wall of the balancing block 2, and a removable weight bar 4 is provided inside the placement groove 3. The weight bar 4 is an elastic stainless steel bar. Both ends of the weight bar 4 are provided with a pointed structure. The number of the placement grooves 3 and the number of the weight bars 4 are both three. When the degree of eccentricity of the crankshaft 1 changes, the number of the weight bars 4 installed on the balancing block 2 can be adjusted to reduce the degree of eccentricity of the crankshaft 1, so that the crankshaft 1 can rotate smoothly.

[0024] Reference Figure 1-2 , sockets 5 are fixed on both sides of the placement slot 3, and the sockets 5 and the balance block 2 are integrally formed. The two ends of the additional weight bar 4 are respectively inserted into the inside of the two sockets 5. When the additional weight bar 4 needs to be installed, the two ends of the additional weight bar 4 can be inserted into the inside of the sockets 5 on both sides, so that the additional weight bar 4 can be snap-fitted and fixed inside the placement slot 3, and it is also convenient to remove the additional weight bar 4.

[0025] During use: the crankshaft 1 drives the balancing block 2 to rotate during the rotation process. Both sides of the balancing block 2 are set with curved surfaces. The curvature of the curved surface can reduce the resistance of the balancing block 2 during the rotation process; when the eccentricity of the crankshaft 1 changes, the number of additional weight bars 4 installed on the balancing block 2 can be adjusted to reduce the eccentricity of the crankshaft 1, so that the crankshaft 1 can rotate smoothly.

[0026] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A refrigeration compressor crankshaft with reduced resistance, comprising a crankshaft (1) and a balancing block (2), characterized in that: The balancing block (2) is fixedly mounted on the shaft wall of the crankshaft (1), and both sides of the balancing block (2) are provided with curved surfaces; The side wall of the balancing weight (2) is provided with a placement groove (3), and a detachable weight strip (4) is provided inside the placement groove (3).

2. A refrigeration compressor crankshaft with reduced resistance according to claim 1, characterized in that: Insertion sleeves (5) are fixedly provided on both sides of the placement groove (3), and the two ends of the weight-attached strip (4) are respectively inserted into the inside of the two insertion sleeves (5).

3. A refrigeration compressor crankshaft with reduced resistance according to claim 1, characterized in that: The additional weight strip (4) is made of elastic stainless steel strip.

4. A refrigeration compressor crankshaft with reduced resistance according to claim 1, characterized in that: Both ends of the additional weight bar (4) are provided with pointed structures.

5. A refrigeration compressor crankshaft with reduced resistance according to claim 1, characterized in that: The number of the placement slots (3) and the number of the weight-attached strips (4) are both three.

6. A refrigeration compressor crankshaft with reduced resistance according to claim 2, characterized in that: The insert sleeve (5) and the balancing weight (2) are integrally formed.

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