A crankshaft applied to a high-load fixed-frequency compressor

Abstract

The utility model discloses a kind of crankshafts for high load fixed-frequency compressor, more specifically relates to the technical field of crankshaft for compressor, including long shaft, the long shaft upper end is equipped with crankshaft protection device, the crankshaft protection device includes: positioning rotary connecting component and heat dissipation protection component, the heat dissipation protection component is set in the inside upper and lower ends of positioning rotary connecting component.The utility model through a kind of crankshafts for high load fixed-frequency compressor, compared with prior art, effectively solve the problem that the short shaft is clamped between counterweight and balancing block and causes the rotation temperature to be too high for a long time rotation, cooling and heat dissipation work are realized by the gas of rotation circulation between counterweight and balancing block, and the use protection performance of entire device is greatly improved, and the device reinforcing bin is reinforced and supported by the inner support reinforcing pad block set inside, further enhance the use firmness of entire device, greatly enhance the practicality and use convenience of entire device.

Description

Technical Field

[0001] This utility model relates to the field of crankshaft technology for compressors, and more specifically, to a crankshaft used in high-load fixed-frequency compressors. Background Technology

[0002] A reciprocating compressor operates by the continuous change of the working volume formed by the cylinder, valves, and the piston reciprocating within the cylinder. The crankshaft is one of the main components of a reciprocating compressor, transmitting all the compressor's power. Its main function is to convert the rotational motion of the electric motor into the reciprocating linear motion of the piston via the connecting rod.

[0003] The noise generated by a piston compressor during operation is largely due to the vibration caused by the crankshaft movement. The unbalanced force of the crankshaft, which generates an unbalanced torque, is the main source of vibration. If there is no corresponding balancing force and torque inside the compressor, it will cause the compressor to vibrate, and this vibration will be transmitted to the refrigerator through the compressor feet and connecting pipes. Currently, most compressor manufacturers use counterweights on the crankshaft to balance rotational inertia, reciprocating inertia, and gas forces. Generally, the counterweights are directly riveted to the balance blocks on the crankshaft. This results in poor gas flow in the internal space due to the stacking and rotation of the counterweights and balance blocks, and the high temperature at the connection points can easily lead to excessively high operating temperatures of the entire unit, reducing its service life. Utility Model Content

[0004] In order to overcome the above-mentioned defects of the prior art, the embodiments of this utility model provide a crankshaft for use in a high-load fixed-frequency compressor, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a crankshaft for a high-load fixed-frequency compressor, comprising a long shaft, wherein a crankshaft protection device is installed at the upper end of the long shaft, the crankshaft protection device comprising: a positioning and rotating connection assembly and a heat dissipation and protection assembly, wherein the heat dissipation and protection assembly is disposed at the upper and lower ends inside the positioning and rotating connection assembly.

[0006] In a preferred embodiment, the positioning and rotating connection assembly includes: a counterweight, a balance block, an upper limit shaft, a short shaft, and a connecting rod. One end of the connecting rod is installed on the outer wall of the side of the short shaft. The upper and lower ends of the short shaft are respectively installed on the lower end of the counterweight and the upper end of the balance block. The lower end of the balance block is installed on the upper end of the long shaft.

[0007] In a preferred embodiment, the heat dissipation and protection assembly includes: a reinforcement chamber, an inner support reinforcement pad, a connecting rod, and a heat dissipation fan blade, with one end of the heat dissipation fan blade mounted on the outer wall of the side of the connecting rod.

[0008] In a preferred embodiment, the lower end of the upper limit shaft is mounted on the upper end of the short shaft, the lower end of the counterweight is mounted on the upper end of the short shaft, and the lower end of the counterweight is positioned on the upper limit shaft.

[0009] In a preferred embodiment, the lower end of the connecting rod is mounted on the upper end of the balance block, and multiple sets of cooling fan blades are provided, with all sets of cooling fan blades being the same size and model. The reinforcement chamber is located inside the balance block.

[0010] In a preferred embodiment, the upper and lower ends of the inner support reinforcement pad are installed inside the reinforcement chamber, and the upper end of the balance block is installed at the lower end of the short shaft.

[0011] In a preferred embodiment, the size of the inner support reinforcement pad is adapted to the size of the reinforcement chamber, and the upper end of the heat dissipation fan blade is located at the lower end of the connecting rod.

[0012] The technical effects and advantages of this utility model are as follows:

[0013] A crankshaft for high-load fixed-frequency compressors effectively solves the problem of excessively high rotation temperature caused by the short shaft rotating between the counterweight and balance block for a long time, compared with the existing technology. The cooling and heat dissipation work is achieved by the gas flowing between the counterweight and balance block through rotation, which greatly improves the performance of the entire device. In addition, the device's reinforcement chamber is reinforced and supported by internal support pads, which further enhances the overall robustness of the device and greatly improves its practicality and ease of use. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0015] Figure 2 This is a schematic diagram of the crankshaft protection device of this utility model.

[0016] Figure 3 This is a schematic diagram of the positioning and rotating connection assembly of this utility model.

[0017] Figure 4 This is a schematic diagram of the heat dissipation and protection component structure of this utility model.

[0018] The attached figures are labeled as follows: 1. Long shaft; 2. Crankshaft protection device; 21. Positioning and rotating connection assembly; 211. Connecting rod; 212. Short shaft; 214. Counterweight; 215. Upper limit shaft; 216. Balance block; 22. Heat dissipation and protection assembly; 221. Connecting rod; 222. Heat dissipation fan blade; 223. Reinforcement chamber; 224. Internal support reinforcement pad. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] As attached Figure 1-4 As shown, this utility model provides a crankshaft for a high-load fixed-frequency compressor, including a long shaft 1. A crankshaft protection device 2 is installed on the upper end of the long shaft 1. The crankshaft protection device 2 includes a positioning and rotating connection assembly 21 and a heat dissipation and protection assembly 22. The heat dissipation and protection assembly 22 is disposed at the upper and lower ends inside the positioning and rotating connection assembly 21.

[0021] The positioning and rotating connection assembly 21 includes: a counterweight 214, a balance block 216, an upper limit shaft 215, a short shaft 212, and a connecting rod 211. One end of the connecting rod 211 is installed on the outer side wall of the short shaft 212. The upper and lower ends of the short shaft 212 are respectively installed on the lower end of the counterweight 214 and the upper end of the balance block 216. The lower end of the balance block 216 is installed on the upper end of the long shaft 1. The lower end of the upper limit shaft 215 is installed on the upper end of the short shaft 212. The lower end of the counterweight 214 is installed on the upper end of the short shaft 212. The lower end of the counterweight 214 is set on the upper limit shaft 215.

[0022] The heat dissipation and protection component 22 includes: a reinforcement chamber 223, an inner support reinforcement pad 224, a connecting rod 221, and a heat dissipation fan blade 222. One end of the heat dissipation fan blade 222 is installed on the outer side wall of the connecting rod 221, and the lower end of the connecting rod 221 is installed on the upper end of the balance block 216. Multiple sets of heat dissipation fan blades 222 are provided, and the multiple sets of heat dissipation fan blades 222 are of the same model and size. The reinforcement chamber 223 is opened inside the balance block 216. The upper and lower ends of the inner support reinforcement pad 224 are installed inside the reinforcement chamber 223. The upper end of the balance block 216 is installed on the lower end of the short shaft 212. The model and size of the inner support reinforcement pad 224 are adapted to the model and size inside the reinforcement chamber 223. The upper end of the heat dissipation fan blade 222 is set at the lower end of the connecting rod 211.

[0023] The specific implementation method is as follows: When using this utility model, the short shaft 212 can be rotated by the balance block 216 at the lower end. After the short shaft 212 rotates, it drives the short shaft 212 installed at the output end to rotate. After the short shaft 212 rotates, it drives the connecting rod 211 installed on the side to rotate. After the connecting rod 211 moves, the counterweight block 214 at the upper end can perform counterweight protection. While the counterweight block 214 is performing counterweight protection, the cooling fan blades 222 installed at the upper end inside the balance block 216 at the lower end can rotate. After the cooling fan blades 222 and the balance block 216 rotate synchronously, they can drive the internal... The gas circulates, and when the balance block 216 drives the cooling fan blades 222 to complete the gas circulation, it effectively solves the problem of excessive rotation temperature caused by the short shaft 212 being clamped between the counterweight 214 and the balance block 216 for a long time. The gas circulated between the counterweight 214 and the balance block 216 through rotation achieves cooling and heat dissipation, greatly improving the overall performance of the device. In addition, the device's reinforcement chamber 223 is reinforced and supported by the internal support reinforcement pads 224, further enhancing the overall stability of the device and greatly improving its practicality and ease of use.

[0024] The working principle of this utility model is as follows: The short shaft 212 can be rotated by the balance block 216 at the lower end. After the short shaft 212 rotates, it drives the short shaft 212 installed at the output end to rotate. After the short shaft 212 rotates, it drives the connecting rod 211 installed on the side to rotate. After the connecting rod 211 moves, the counterweight block 214 at the upper end can perform counterweight protection. While the counterweight block 214 is performing counterweight protection, the cooling fan blades 222 installed at the upper end inside the balance block 216 at the lower end can rotate. After the cooling fan blades 222 and the balance block 216 rotate synchronously, they can drive the internal gas to circulate. After the balance block 216 drives the cooling fan blades 222 to complete the gas circulation, the problem of excessive rotation temperature caused by the short shaft 212 being sandwiched between the counterweight block 214 and the balance block 216 for a long time is effectively solved. The cooling and heat dissipation work achieved by the rotating gas between the counterweight block 214 and the balance block 216 greatly improves the performance of the entire device.

[0025] Finally, the following points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", and "linkage" should be interpreted broadly, and can be mechanical or electrical connections, or internal connections between two components, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may change.

[0026] Secondly: The accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other.

[0027] In conclusion, the above are merely preferred embodiments of this utility model and are not intended to limit this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A crankshaft for use in a high-load fixed-frequency compressor, comprising a long shaft (1), characterized in that: A crankshaft protection device (2) is installed on the upper end of the long shaft (1); The crankshaft protection device (2) includes: a positioning and rotating connection assembly (21) and a heat dissipation and protection assembly (22), wherein the heat dissipation and protection assembly (22) is disposed at the upper and lower ends inside the positioning and rotating connection assembly (21).

2. The crankshaft for a high-load fixed-frequency compressor according to claim 1, characterized in that: The positioning and rotating connection assembly (21) includes: a counterweight (214), a balance block (216), an upper limit shaft (215), a short shaft (212), and a connecting rod (211). One end of the connecting rod (211) is installed on the outer side wall of the short shaft (212). The upper and lower ends of the short shaft (212) are respectively installed on the lower end of the counterweight (214) and the upper end of the balance block (216). The lower end of the balance block (216) is installed on the upper end of the long shaft (1).

3. A crankshaft for a high-load fixed-frequency compressor according to claim 2, characterized in that: The heat dissipation and protection component (22) includes: a reinforcement chamber (223), an inner support reinforcement pad (224), a connecting rod (221), and a heat dissipation fan blade (222), one end of which is installed on the outer side wall of the connecting rod (221).

4. A crankshaft for a high-load fixed-frequency compressor according to claim 2, characterized in that: The lower end of the upper limit shaft (215) is installed on the upper end of the short shaft (212), the lower end of the counterweight (214) is installed on the upper end of the short shaft (212), and the lower end of the counterweight (214) is set on the upper limit shaft (215).

5. A crankshaft for a high-load fixed-frequency compressor according to claim 3, characterized in that: The lower end of the connecting rod (221) is installed on the upper end of the balance block (216). There are multiple sets of heat dissipation fan blades (222), and the multiple sets of heat dissipation fan blades (222) are of the same model and size. The reinforcement chamber (223) is opened inside the balance block (216).

6. A crankshaft for a high-load fixed-frequency compressor according to claim 3, characterized in that: The inner support reinforcement pad (224) is installed inside the reinforcement chamber (223) at both ends, and the upper end of the balance block (216) is installed at the lower end of the short shaft (212).

7. A crankshaft for a high-load fixed-frequency compressor according to claim 3, characterized in that: The size of the inner support reinforcement pad (224) is compatible with the size of the reinforcement chamber (223), and the upper end of the heat dissipation fan blade (222) is set at the lower end of the connecting rod (211).

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