Crankshaft dynamic balance weight assembly, compressor and refrigeration equipment

Abstract

The utility model belongs to the technical field of compressors, and particularly discloses a crankshaft dynamic balance counterweight assembly, a compressor and refrigeration equipment, the crankshaft dynamic balance counterweight assembly comprises a crankshaft, a first balancing weight, a second balancing weight, a balancing block and a positioning column, the first balancing weight is detachably connected with a crank, the second balancing weight is detachably connected with an eccentric shaft, and the balancing block is detachably connected with the crankshaft. And different counterweights can be conveniently replaced for testing in the dynamic balance checking process. The balancing block is connected with the second balancing weight in a sliding mode, the balancing block can be kept static relative to the second balancing weight through the positioning columns arranged on the two sides of the balancing block, and the balancing weight can be finely adjusted by adjusting the balancing block and the positioning columns. In addition, the crankshaft dynamic balance counterweight assembly is high in part universality, and diversified crankshaft balancing schemes can be provided for compressors of different models.

Description

TECHNICAL FIELD

[0001] The utility model belongs to compressor technical field relates to a crankshaft dynamic balance counterweight subassembly, compressor and refrigeration plant. BACKGROUND

[0002] The compressor is the key component of the refrigeration equipment, which drives the crankshaft to rotate through the motor, and converts the rotary motion of the crankshaft into the reciprocating motion of the piston, so as to realize the compression action. However, the crankshaft will be affected by various forces when working, which leads to a series of problems such as vibration and noise. For the problem of inertia force balance of single cylinder compressor, the general method is to install appropriate counterweight on the crankshaft to realize the dynamic balance of the crankshaft when working.

[0003] In actual dynamic balance calculation, the parameters of the crankshaft itself including mass, moment of inertia, etc. There is a certain gap with the parameters in the theoretical calculation model. In order to optimize the dynamic balance performance of the crankshaft and reduce the vibration and noise of the compressor, dynamic balance checking is usually carried out in the design stage of the compressor, that is, different mass counterweights are assembled on the crankshaft and tested. However, the connection mode between the counterweight and the crankshaft is generally riveted by rivets. When testing different counterweight schemes, the rivets need to be disassembled or the crankshaft needs to be replaced, and counterweights with different masses need to be tested. This method not only increases the test variables and verification errors, but also increases the workload in the dynamic balance checking process, which makes the test verification process time-consuming and low efficient.

[0004] In addition, the mass and arrangement of the crankshaft counterweight in most compressors on the market are preset and fixed. Such design is good for vibration reduction of compressors of specific models and speeds, but the counterweight schemes provided are single, which is difficult to meet the diversified needs of compressors of different models in the mass production process.

[0005] Therefore, it is urgent to provide a new crankshaft dynamic balance counterweight assembly to solve the above technical problems in the prior art. UTILITY MODEL CONTENTS

[0006] The utility model aims at providing a crankshaft dynamic balance counterweight assembly, a compressor and a refrigeration plant, which is convenient for adjusting the counterweight in the dynamic balance checking process and can provide various crankshaft counterweight schemes for compressors of different models.

[0007] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0008] A crankshaft dynamic balance counterweight assembly, comprising a crankshaft, a first counterweight, a second counterweight and a counterweight block.

[0009] The crankshaft comprises a main shaft, a crank and an eccentric shaft, and the main shaft and the eccentric shaft are connected through the crank;

[0010] The first counterweight is connected with the crank, and the second counterweight is connected with the eccentric shaft;

[0011] The second counterweight is provided with a guide rail, and the counterbalance block is in sliding fit with the guide rail;

[0012] The second counterweight is further provided with a positioning column, and the positioning column is located at two sides of the counterbalance block.

[0013] Preferably, the first counterweight is detachably connected with the crank;

[0014] The second counterweight is detachably connected with the eccentric shaft.

[0015] Preferably, the second counterweight is connected with the eccentric shaft through a counterweight base.

[0016] Preferably, the counterweight base is provided with an assembly protrusion.

[0017] The second counterweight is provided with an assembly groove matched with the assembly protrusion.

[0018] Preferably, the counterbalance block has a plurality of positioning columns, and each positioning column is located at one side of the counterbalance block.

[0019] Preferably, the guide rail is provided with a clamping groove for mounting the positioning column, and the clamping grooves are distributed at equal intervals along the guide rail.

[0020] Preferably, the guide rail is an arc-shaped guide rail.

[0021] Preferably, the first counterweight and the second counterweight both adopt an arc-shaped structure.

[0022] A compressor provided with the crank dynamic balance counterweight assembly.

[0023] A refrigeration equipment provided with the compressor.

[0024] Compared with the prior art, the compressor has the following beneficial effects:

[0025] As described above, the utility model discloses a crankshaft dynamic balance counterweight assembly, and applies it to compressor and refrigeration equipment, the first counterweight block of the utility model discloses a crankshaft dynamic balance counterweight assembly connects the crank, the second counterweight block connects eccentric shaft, and the optimization of dynamic balance performance in the working process of crankshaft is realized through the arrangement of first counterweight block and second counterweight block. In addition, the guide rail on the counterweight block and second counterweight block of the crankshaft dynamic balance counterweight assembly slide fit, and the positioning column is arranged on both sides of counterweight block, so that counterweight block can keep still relative to second counterweight block, and the effect of fine tuning balance weight can be achieved through the adjustment of the arrangement of counterweight block and positioning column, so as to improve the efficiency of dynamic balance check. The utility model discloses a crankshaft dynamic balance counterweight assembly is more flexible and convenient for the adjustment of counterweight, and the universality of its parts is high, not only is suitable for fixed frequency compressor, also is suitable for variable frequency compressor, and is not limited to the test verification process of dynamic balance check, and can provide diversified crankshaft counterplan for the mass production of different models of compressor. BRIEF DESCRIPTION OF DRAWINGS

[0026] 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 drawing needed to be used in the embodiment or prior art description.

[0027] Figure 1 It is the solid of the crankshaft dynamic balance counterweight assembly in the embodiment of the utility model Figure One ;

[0028] Figure 2 It is the solid of the crankshaft dynamic balance counterweight assembly in the embodiment of the utility model Figure Two ;

[0029] Figure 3 It is the front view of the crankshaft dynamic balance counterweight assembly in the embodiment of the utility model;

[0030] Figure 4 It is the side view of the crankshaft dynamic balance counterweight assembly in the embodiment of the utility model;

[0031] Figure 5 It is the plan view of the crankshaft dynamic balance counterweight assembly in the embodiment of the utility model;

[0032] Figure 6 It is the solid of the crankshaft in the embodiment of the utility model;

[0033] Figure 7 It is the solid of the first counterweight block in the embodiment of the utility model;

[0034] Figure 8 It is the solid of the second counterweight block in the embodiment of the utility model;

[0035] Figure 9 It is the plan view of the second counterweight block in the embodiment of the utility model;

[0036] Figure 10 is a bottom view of the second counterweight block in the embodiment of the utility model;

[0037] Figure 11 is a perspective view of the counterweight block base in the embodiment of the utility model;

[0038] Figure 12 is a perspective view of the counterbalance block in the embodiment of the utility model;

[0039] Wherein, 1-main shaft, 2-crank, 3- eccentric shaft, 4-first counterweight block, 5-second counterweight block;

[0040] 51-counterbalance block, 52-positioning column, 53-assembly slot, 54-guide rail, 55- clamping groove, 6-counterweight block base, 61-assembly protrusion. DETAILED DESCRIPTION

[0041] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments.

[0042] Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the protection scope of the utility model.

[0043] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the utility model are only used to explain the relative positional relationship, movement condition, etc. between components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the directional indications also change accordingly.

[0044] In addition, the description such as "first", "second" in the utility model is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In the description of the utility model, the meaning of "multiple" is at least two, for example, two, three, etc., unless otherwise specifically limited.

[0045] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0046] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0047] Example 1

[0048] like Figures 1 to 12 As shown, the crankshaft dynamic balancing counterweight assembly of this embodiment includes a crankshaft, a first counterweight block 4, a second counterweight block 5, and a balancing block 51. The crankshaft includes a main shaft 1, a crank 2, and an eccentric shaft 3, with the main shaft 1 and the eccentric shaft 3 connected by the crank 2.

[0049] First, the crankshaft dynamic balancing counterweight assembly in this embodiment optimizes the dynamic balance performance of the crankshaft during operation by arranging the first counterweight block 4 and the second counterweight block 5.

[0050] The first counterweight 4 is connected to the crank 2. In this embodiment, the first counterweight 4 and the crank 2 are detachably connected. Specifically, threaded holes are provided at corresponding positions on the first counterweight 4 and the crank 2, and the first counterweight 4 and the crank 2 are connected by screws, which facilitates the disassembly and installation of the first counterweight 4. The first counterweight 4 can be set with different thicknesses and numbers. The specific selection of the thickness and number of the first counterweight 4 depends on whether the rotational motion of the crankshaft and the reciprocating motion of the connecting rod will interfere after the first counterweight 4 is added to the crank 2.

[0051] The second counterweight 5 is connected to the eccentric shaft 3. In this embodiment, the second counterweight 5 and the eccentric shaft 3 are detachably connected. Specifically, a counterweight base 6 is added to the eccentric part of the crankshaft. The counterweight base 6 and the eccentric shaft 3 of the crankshaft are preferably connected by screws, which facilitates the disassembly and installation of the counterweight base 6. The second counterweight 5 is connected to the eccentric shaft 3 through the counterweight base 6. Specifically, the counterweight base 6 is provided with an assembly protrusion 61, and the second counterweight 5 is provided with an assembly groove 53 that mates with the assembly protrusion 61. The assembly protrusion 61 can be nested in the assembly groove 53. Through the cooperation between the assembly protrusion 61 and the assembly groove 53, the installation and positioning of the second counterweight 5 are achieved.

[0052] The crankshaft dynamic balance weight assembly of the embodiment can also fine-tune the balance weight by adjusting the arrangement of the trimming block 51 and the positioning column 52, thereby improving the efficiency of dynamic balance checking.

[0053] The trimming block 51 is in sliding connection with the second weight block 5. Specifically, the second weight block 5 is provided with a guide rail 54, and the trimming block 51 is in sliding connection with the guide rail 54. The second weight block 5 is also provided with a positioning column 52, which is located on both sides of the trimming block 51. The positioning column 52 is used to keep the trimming block 51 stationary relative to the second weight block 5. In the embodiment, the guide rail 54 of the second weight block 5 is provided with a clamping groove 55 for installing the positioning column 52. The clamping grooves 55 are distributed at equal intervals along the guide rail 54, so as to more accurately adjust the position of the trimming block 51.

[0054] The trimming block 51 is preferably provided with several, and each trimming block 51 is provided with a pair of positioning columns 52 on both sides. The number of trimming blocks 51 can be increased or decreased according to the needs of balance verification. By selecting different positions and different masses of the trimming block 51 and the positioning column 52, the dynamic adjustment of the dynamic balance performance of the crankshaft can be realized, without complex installation and disassembly processes, so that the process of dynamic balance test verification is more convenient.

[0055] In addition, the first weight block 4 and the second weight block 5 are preferably in arc-shaped structure. In the embodiment, the eccentric shaft 3 is located on the opposite side of the first weight block 4 and the second weight block 5, so as to realize the balance of rotational inertia force and reciprocating inertia force.

[0056] The guide rail 54 is preferably an arc-shaped guide rail. In the embodiment, the trimming block 51 is in a half I-shaped type, and the upper surface and the lower surface of the second weight block 5 are provided with arc-shaped guide rails. The trimming block 51 can slide into the second weight block 5 from both sides and move along the arc-shaped guide rails on the upper surface and the lower surface of the second weight block 5. The clamping grooves 55 for installing the positioning column 52 are arranged towards the center of the arc-shaped guide rail. The positioning column 52 is installed in the clamping groove 55 to keep the trimming block 51 stationary relative to the second weight block 5. In addition to the positioning function, the positioning column 52 can also fine-tune the balance weight during different balance weight verification.

[0057] During actual dynamic balance test verification, considering that the weight blocks on both sides of the crank 2 are too high, which may cause interference with the movement of the connecting rod and the rotor, the weight block base 6 can be added to the eccentric part of the crankshaft. By nesting the second weight block 5 and matching the trimming block 51 and the positioning column 52 of different mass specifications, the test verification of different dynamic balance schemes can be realized more conveniently without damaging the rotating structure of the crankshaft.

[0058] In addition, the crankshaft dynamic balance counterweight assembly is more flexible and convenient for adjusting the counterweight, the parts are highly universal, is applicable to the fixed frequency compressor, is also applicable to the variable frequency compressor, and is not limited to the test verification process of dynamic balance checking, and can provide diversified crankshaft counterweight schemes for mass production of compressors of different models.

[0059] Embodiment 2

[0060] A compressor, the compressor is provided with the crankshaft dynamic balance counterweight assembly.

[0061] The first counterweight block is connected with the crank, the second counterweight block is connected with the eccentric shaft, and the arrangement of the first counterweight block and the second counterweight block realizes optimization of dynamic balance performance in the working process of the crank, so as to reduce vibration and noise of the compressor during working. In addition, the counterweight block in the crankshaft dynamic balance counterweight assembly of the compressor is in sliding fit with the guide rail on the second counterweight block, and the positioning column is arranged on both sides of the counterweight block, so that the counterweight block can be kept stationary relative to the second counterweight block, and the effect of fine tuning the counterweight can be achieved by adjusting the arrangement of the counterweight block and the positioning column, so as to improve the efficiency of dynamic balance checking. The crankshaft dynamic balance counterweight assembly is more flexible and convenient for adjusting the counterweight, the parts are highly universal, is applicable to the fixed frequency compressor, is also applicable to the variable frequency compressor, and is not limited to the test verification process of dynamic balance checking, and can provide diversified crankshaft counterweight schemes for mass production of compressors of different models.

[0062] Embodiment 3

[0063] A refrigeration equipment, the compressor of embodiment 2 is used in the refrigeration equipment. The refrigeration equipment includes a refrigerator and the like.

[0064] So far, the embodiments have been described in detail with reference to the drawings. According to the above description, those skilled in the art should have a clear understanding of the crankshaft dynamic balance counterweight assembly, the compressor and the refrigeration equipment of the utility model. Of course, the above description is only the preferred embodiments of the utility model, and does not limit the patent range of the utility model, and any equivalent structural transformation made by using the utility model specification and drawings contents, or direct / indirect application in other related technical fields is included in the patent protection range of the utility model, and should be protected by the utility model.

Claims

1. A crankshaft dynamic balance weight assembly, characterized by, The crankshaft comprises a main shaft, a crank and an eccentric shaft, and the main shaft and the eccentric shaft are connected through the crank. The first counterweight is connected with the crank, and the second counterweight is connected with the eccentric shaft. The second counterweight is provided with a guide rail, and the counterbalance block is in sliding fit with the guide rail. The second counterweight is further provided with a positioning column, and the positioning column is located on both sides of the counterbalance block.

2. The crankshaft dynamic balance counterweight assembly according to claim 1, wherein, The first counterweight is detachably connected with the crank. The second counterweight is detachably connected with the eccentric shaft.

3. The crankshaft dynamic balance counterweight assembly according to claim 1, wherein, The second counterweight is connected with the eccentric shaft through a counterweight base.

4. The crankshaft dynamic balance counterweight assembly according to claim 3, wherein, The counterweight base is provided with an assembly protrusion. The second counterweight is provided with an assembly groove matched with the assembly protrusion.

5. The crankshaft dynamic balance counterweight assembly according to claim 1, wherein, The counterbalance block has a plurality of counterbalance blocks, and each counterbalance block is provided with a positioning column on each side.

6. The crankshaft dynamic balance counterweight assembly according to claim 1, wherein, The guide rail is provided with a clamping groove for mounting the positioning column, and the clamping grooves are distributed at equal intervals along the guide rail.

7. The crankshaft dynamic balance counterweight assembly according to claim 1 or 6, wherein, The guide rail is an arc-shaped guide rail.

8. The crankshaft dynamic balance counterweight assembly according to claim 1, wherein, The first counterweight and the second counterweight both adopt an arc-shaped structure.

9. A compressor, comprising: The compressor is provided with the crankshaft dynamic balance counterweight assembly according to any one of claims 1 to 8.

10. A refrigeration device, comprising: The refrigeration device is provided with the compressor according to claim 9. ​

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