Crankshaft with spiral centrifugal oiling structure

Abstract

The utility model discloses a crankshaft with a spiral centrifugal oil feeding structure, which comprises a crankshaft and a spiral oil feeding pump, an oil feeding mounting groove is designed in the crankshaft, and the oil feeding mounting groove and the spiral oil feeding pump jointly form a centrifugal cavity. A shoe-shaped gold ingot-shaped connecting part is arranged on the upper side of the crankshaft, and a hollow cylindrical rotating part is arranged at the top of the crankshaft. The lower end of the spiral oil way is connected with an upper side channel of the centrifugal cavity, and the upper end of the spiral oil way is connected with the rotating part through a pipeline. And the lower end of the U-shaped groove is provided with a through hole. The upper side of the vertical air outlet channel penetrates through the connecting piece, and the lower side of the vertical air outlet channel is connected with the oiling installation groove. The bottom of the spiral oil feeding pump is provided with a transverse groove, the middle of the spiral oil feeding pump penetrates through an inclined oil feeding channel, and the lower end of the spiral oil feeding pump is located in the center of the transverse groove. The size of the centrifugal cavity is adjusted by adjusting the press-in depth of the oil pump on the screw so as to adapt to compressors of different models. The centrifugal oiling quantity of a traditional inclined oil hole design is improved, and low-speed oiling tension is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to refrigeration compressor technical field especially is involved in a crankshaft with spiral centrifugal oil feeding structure. BACKGROUND

[0002] The refrigeration compressor is usually arranged at the rear bottom of the refrigerator, and its main function is to compress and transport the circulating refrigerant in the refrigerator system, so as to transfer heat from the inside of the refrigerator to the surrounding environment.

[0003] The crankshaft is an important component in the crankshaft-connecting rod mechanism of the compressor, which has a pumping function. On the one hand, it can lubricate the crankshaft-connecting rod-piston mechanism to prevent the mechanism from being stuck. On the other hand, it can cool the piston-cylinder unit.

[0004] Among the types of compressor return faults, crankshaft pullout faults often occur around the position of the oil hole. Through analysis of the fault, it is found that the position of the crankshaft oil hole is matched with the lower end of the crankshaft hole. This place bears the torque generated when the piston-cylinder unit is compressed, and the working condition is relatively poor. The position opposite to the oil hole is prone to crankshaft pullout failure due to insufficient lubrication.

[0005] The utility model discloses a refrigeration compressor crankshaft, relates to a crankshaft for refrigeration compressor and belongs to the technical field of compressor. The structure comprises a long shaft, an oil feeding hole is arranged on the upper part of the long shaft, and an air outlet groove is arranged on the side wall of the upper part of the long shaft and communicates with one end of the oil feeding hole and extends to the end part of the long shaft.

[0006] However, the utility model still has the following disadvantages: the bottom of the crankshaft cannot adjust the amount of oil pressed in at any time, cannot guarantee the oil tension of the variable frequency compressor at low speed, and cannot adjust the pressing depth of the spiral oil feeding pump according to the height of the movement core, which reduces the types of parts due to length difference and makes daily management inconvenient. SUMMARY

[0007] To improve the conventional inclined oil hole centrifugal oil feeding amount and ensure the variable frequency compressor low-speed oil feeding pressure and other problems, the utility model provides a crankshaft with spiral centrifugal oil feeding structure, which comprises a crankshaft and a spiral oil feeding pump, characterized in that an oil feeding installation groove is arranged in the crankshaft, a centrifugal cavity is formed between the oil feeding installation groove and the spiral oil feeding pump, a passage is arranged on the upper side of the centrifugal cavity;

[0008] The connecting part is in the shape of a gold ingot, and a hollow cylindrical rotating part is arranged at the top end of the connecting part.

[0009] Preferably, a spiral crankshaft oil passage is arranged on the outer side of the crankshaft, and the lower end of the crankshaft oil passage is connected with the upper side passage of the centrifugal cavity. The lubrication system is optimized, and the lubrication efficiency and the energy efficiency of the compressor are improved. It effectively transports the lubricating oil to the upper part of the crankshaft by centrifugal force, reduces the risk of oil passage blockage caused by improper machining, and reduces the machining cost and difficulty.

[0010] Preferably, a U-shaped groove is arranged on the outer side of the rotating part, the lower end of the U-shaped groove is a through hole, and a groove is cut at one end near the center of the upper side of the rotating part. The stability and carrying capacity of the component are enhanced, the lubrication and cooling effects are optimized, the wear is reduced, and the service life is prolonged.

[0011] Preferably, a vertical gas outlet passage is arranged in the middle of the crankshaft, an upper side through connecting piece, and a lower side oil feeding installation groove are connected.

[0012] Preferably, the upper end of the spiral oil passage arranged on the outer side of the crankshaft is provided with a pipeline connected with the rotating part. The oil passage system is optimized, the lubrication efficiency and the performance of the compressor are improved. It ensures that the lubricating oil can be effectively distributed to the key parts by centrifugal force when the crankshaft rotates, reduces friction and energy loss, and improves energy efficiency.

[0013] Preferably, a screw thread is arranged on the outer side of the spiral oil feeding pump, a horizontal groove is arranged at the bottom, and an inclined oil feeding passage is arranged through the middle.

[0014] Preferably, the lower end of the inclined oil feeding passage is arranged at the center of the horizontal groove, and the upper end of the passage is arranged on the outer side of the spiral oil feeding pump. The inclined passage helps to guide the lubricating oil directly to the outer side of the spiral oil feeding pump, so as to ensure that the lubricating oil can be effectively dispersed to each part needing lubrication when the crankshaft rotates, and the lubrication effect is enhanced.

[0015] Preferably, the size of the centrifugal cavity can be adjusted by the pressing depth of the spiral oil feeding pump. Adjusting the size of the centrifugal cavity can adapt to the lubrication demand under different rotating speeds and working conditions, and ensure that the crankshaft and related parts can be properly lubricated under various operating conditions.

[0016] The utility model has the following beneficial effects,

[0017] The crankshaft bottom is pressed into a spiral oiling pump, improving the conventional inclined oil hole centrifugal oiling amount: by pressing the crankshaft bottom into a spiral oiling pump, replacing the traditional inclined oil hole design, the centrifugal force driven oiling efficiency is effectively improved. This design can ensure that during the rotation of the crankshaft, the lubricating oil is more effectively pumped from the oil sump to the crankshaft and bearing surface, thereby improving the lubrication conditions, reducing the wear caused by insufficient lubrication, and improving the working efficiency and reliability of the compressor.

[0018] Guarantee the oiling tension of the variable frequency compressor at low speed: in the variable frequency compressor, due to the fluctuation of the rotating speed, the traditional oiling system may not be able to guarantee sufficient oil pressure at low speed, and this spiral centrifugal oiling structure can adapt to different rotating speeds, ensuring that stable oil pressure and oil amount can be provided even at low speed, thereby avoiding the lubrication problem caused by insufficient oil pressure and prolonging the service life of the compressor.

[0019] The depth of the spiral oiling pump pressed into the crankshaft can be adjusted according to the height of the core, reducing the number of types caused by the length difference of the parts, and facilitating daily management: the depth of the spiral oiling pump pressed into the crankshaft can be adjusted according to the height of the core, which makes a single crankshaft design suitable for different types of compressors, reduces the number of types caused by the length difference of the parts, simplifies the inventory management and logistics cost. At the same time, this design also makes the maintenance and replacement work more convenient, because different types of compressors can share the same crankshaft design, reducing the types and quantity of spare parts. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 A schematic view of a crankshaft with a spiral centrifugal oiling structure.

[0021] Figure 2 A schematic view of a crankshaft with a spiral centrifugal oiling structure.

[0022] In the figure: 1, rotating part, 2, U-shaped groove, 3, connecting part, 4, crankshaft, 5, gas outlet channel, 6, crankshaft oil way, 7, centrifugal cavity, 8, oiling channel, 9, spiral oiling pump, 10, shell. DETAILED DESCRIPTION

[0023] The technical scheme in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0024] As Figure 1The crankshaft with the spiral centrifugal oiling structure can be seen to include the crankshaft 4 and the spiral oiling pump 9, the oiling installation groove is arranged in the crankshaft 4, the centrifugal cavity 7 is formed between the oiling installation groove and the spiral oiling pump 9, and the upper side of the centrifugal cavity 7 is provided with a passage; the connecting part 3 is arranged on the upper side of the crankshaft 4, the connecting part 3 is in the shape of a gold ingot, and the top end of the gold ingot-shaped connecting part 3 is further provided with the hollow cylindrical rotating part 1.

[0025] The centrifugal force generated by the rotation of the crankshaft 4 is used to transport the lubricating oil from the bottom to the top of the compressor through the centrifugal cavity 7 between the oiling installation groove in the crankshaft 4 and the spiral oiling pump 9, so that the crankshaft 4 and other moving parts are efficiently lubricated. The structure cancels the traditional oil hole, reduces the processing cost and complexity, and improves the lubrication efficiency, especially in the compressor with low speed or small diameter main shaft, ensures the sufficient supply of lubricating oil, reduces the wear and tear, and prolongs the service life of the compressor.

[0026] The crankshaft 4 is provided with the spiral crankshaft oil way 6 on the outer side, and the lower end of the crankshaft oil way 6 is connected with the upper side passage of the centrifugal cavity 7. The lubrication system is optimized, and the lubrication efficiency and the energy efficiency of the compressor are improved. It uses the centrifugal force to effectively transport the lubricating oil to the upper part of the crankshaft 4, reduces the risk of oil way blockage caused by poor processing, and reduces the processing cost and difficulty. At the same time, this structure improves the lubrication problem of the low-speed compressor, reduces the wear and tear of the friction pair, reduces the power loss of the whole machine, and prolongs the service life of the compressor.

[0027] The outer side of the rotating part 1 is provided with the U-shaped groove 2, the lower end of the U-shaped groove 2 is a through hole, and the upper side of the rotating part 1 is cut with a groove near the center. The U-shaped groove 2 on the outer side of the rotating part 1 is designed, the lower end of which is a through hole, and the upper side is cut with a groove near the center. Such a structure enhances the stability and carrying capacity of the part, optimizes the lubrication and cooling effect, reduces the wear and tear, and prolongs the service life.

[0028] The vertical gas outlet passage 5 is arranged in the middle of the crankshaft 4, the upper side is connected with the through connection piece, and the lower side is connected with the oiling installation groove. The vertical gas outlet passage 5 helps the smooth discharge of the gas in the crankshaft 4 box and prevents the accumulation of pressure in the crankshaft 4 box. The connection of the lower side with the oiling installation groove ensures that the lubricating oil can be effectively transported to the key parts of the crankshaft 4, improves the efficiency of the lubrication system, reduces the friction loss, and improves the mechanical efficiency. The upper side through connection piece balances the weight, which helps to balance the centrifugal force and torque generated by the big end of the connecting rod, the connecting rod journal and the crank, so that the engine runs more smoothly.

[0029] The upper end of the spiral oil passage arranged outside the crankshaft 4 is provided with a pipeline connected with the rotating part 1. In the refrigeration compressor, the spiral oil passage arranged outside the crankshaft 4 is directly connected with the rotating part 1, which can ensure that the lubricating oil is efficiently and uniformly delivered to the key parts of the crankshaft 4, especially the rotating part 1 bearing high load, effectively reducing wear and tear and prolonging the service life of the crankshaft 4. This direct lubrication method improves lubrication efficiency, reduces energy loss, controls the temperature of the crankshaft 4, reduces maintenance requirements, enhances the stability of the compressor operation, and prolongs the overhaul cycle, thereby improving production efficiency. At the same time, it also helps to reduce waste oil production and reduce environmental pollution, providing superior lubrication conditions for the crankshaft 4 of the refrigeration compressor and improving overall performance and environmental friendliness.

[0030] The refrigeration compressor crankshaft adopts a centrifugal spiral oil feeding structure, wherein the outer side of the spiral oil feeding pump 9 is provided with a thread, the bottom is provided with a transverse groove, and the middle is provided with an inclined oil feeding channel 8. The following benefits are achieved:

[0031] The thread structure causes the mixture of lubricating oil and refrigerant vapor to collide and oscillate continuously during the oil feeding process, effectively improving the separation of refrigerant vapor from the lubricating oil.

[0032] In the oil passage corresponding to each thread, the oil is gathered to ensure that the crankshaft 4 has sufficient oil feeding amount and improves the oil feeding efficiency.

[0033] Through the action of the thread structure, more refrigerant vapor is discharged from the exhaust passage, reducing the refrigerant content in the lubricating oil and ensuring the lubrication effect of the lubricating oil.

[0034] Through the oil guide groove extending to the position of the thrust surface or close to the position of the thrust surface, the cooperation area of the main shaft of the crankshaft 4 and the bearing hole of the cylinder seat is reduced, further reducing friction loss and improving the energy efficiency of the compressor.

[0035] The newly added spiral oil groove oil feeding amount is used to improve the lubrication of the plain bearing assembly, reduce friction loss, and improve the performance of the compressor.

[0036] Due to the improved lubrication effect and reduced wear of the friction pairs between the parts, the power loss of the entire machine is reduced, and the service life of the compressor is improved.

[0037] The spiral oil feeding column is an integral injection molding structure, which can easily ensure its circularity and further ensure its coaxiality with the oil suction pipe, avoid eccentricity during operation, and reduce processing and assembly difficulty.

[0038] The spiral oil feeding column is an integral injection molding structure, which can easily ensure its circularity and further ensure its coaxiality with the oil suction pipe, avoid eccentricity during operation, and reduce processing and assembly difficulty.

[0039] In summary, this design effectively improves the performance and reliability of the refrigeration compressor crankshaft by enhancing oil pumping effect, improving lubrication conditions, reducing friction loss, and improving energy efficiency.

[0040] The lower end of the inclined oil feeding channel 8 is arranged at the center of the transverse groove, and the upper end of the channel is arranged outside the spiral oil feeding pump 9. The design of the inclined oil feeding channel 8 allows the lubricating oil to be directly transported from the center of the transverse groove to the outside of the spiral oil feeding pump 9. This direct oil path design helps to improve lubrication efficiency.

[0041] Through the design of the inclined channel, the combined effect of gravity and centrifugal force can be utilized to optimize the dynamic characteristics of the oil flow, making the lubricating oil flow more smoothly from the groove to the oil feeding pump. Arranging the lower end of the inclined oil feeding channel 8 at the center of the transverse groove helps to reduce the dead zone of the oil in the groove, ensuring that the oil can be effectively collected and transported to the oil feeding pump.

[0042] The inclined channel helps to direct the lubricating oil directly to the outside of the spiral oil feeding pump 9, which ensures that the lubricating oil is effectively dispersed to the parts that need lubrication when the crankshaft 4 rotates, enhancing the lubrication effect. Effective lubrication can reduce the wear of the crankshaft 4 and related parts, prolonging the service life of the compressor.

[0043] The direct connection of the inclined oil feeding channel 8 with the transverse groove simplifies the oil path structure, reduces additional pipelines and joints, and reduces manufacturing costs and assembly complexity. Simplified oil path reduces possible leakage points and failure points, improving the reliability of the entire lubrication system. Simplified structure design makes maintenance and repair work easier, helping to reduce maintenance time and cost.

[0044] The size of the centrifugal cavity 7 can be adjusted by the pressing depth of the spiral oil feeding pump 9. By adjusting the pressing depth of the spiral oil feeding pump 9, the size of the centrifugal cavity 7 can be changed to adapt to the lubrication needs under different working conditions and speeds, ensuring that the crankshaft 4 and related parts are properly lubricated under various operating conditions.

[0045] Adjusting the size of the centrifugal cavity 7 can optimize the flow characteristics of the oil, making the oil more effectively lifted and distributed under the action of centrifugal force, improving lubrication efficiency and enhancing system reliability.

[0046] The optimized centrifugal cavity 7 design reduces the centrifugal force loss of the oil from the oil suction pipe to the oil groove outside the crankshaft 4, reduces energy consumption, reduces friction and wear, and prolongs the service life of the compressor.

[0047] By eliminating the inclined oil hole, the number of machining tools with high loss rate during machining is reduced, the machining cost of the crankshaft 4 is reduced, the machining process is reduced, and the risk of oil path blockage caused by poor machining is reduced, facilitating product quality control.

[0048] By reducing frictional losses and optimizing lubrication, the energy efficiency of the compressor can be improved and the overall power loss of the machine can be reduced.

[0049] For low-speed compressors or compressors with small crankshafts and small spindle diameters, oil lifting can be easily achieved, improving lubrication.

[0050] The spiral oil column, which is made by one-piece injection molding, will not cause the problems of aging, rusting, and thinning of spring wires that occur when the spiral spring is immersed in a mixture of refrigerant and lubricating oil for a long time. It also avoids the problem of spring falling off and slipping due to decreased elasticity.

[0051] The spiral oil column is an integral injection-molded structure, which easily ensures its cylindricity and thus its coaxiality with the oil suction pipe, avoiding eccentricity during operation and reducing the difficulty of processing and assembly.

[0052] In summary, this design, by adjusting the size of the centrifugal cavity 7, not only improves lubrication efficiency and compressor performance, but also reduces processing costs and maintenance difficulty, while simultaneously enhancing energy efficiency and compressor reliability.

[0053] like Figure 2 The diagram shows the installation of a crankshaft spiral centrifugal oiling structure. The crankshaft 4 is vertically installed in the housing 10. The structure includes the crankshaft 4 and a spiral oiling pump 9. The crankshaft 4 has an internal oiling mounting groove, which, together with the spiral oiling pump 9, forms a centrifugal cavity 7. A channel is located on the upper side of this cavity. The upper side of the crankshaft 4 is equipped with a gold ingot-shaped connecting part 3, and a hollow cylindrical rotating part 1 at the top. A spiral oil passage is located on the outer side of the crankshaft 4, with its lower end connected to the channel on the upper side of the centrifugal cavity 7. The rotating part 1 has a U-shaped groove 2 on its outer side, with a through hole at its lower end and a groove near the center on its upper side. A vertical air outlet channel 5 is located in the middle of the crankshaft 4, with a connecting piece passing through its upper side and connected to the oiling mounting groove at its lower side. The upper end of the spiral oil passage is connected to the rotating part 1 via a pipe. The spiral oiling pump 9 has threads on its outer side, a transverse groove at its bottom, and an inclined oiling channel 8 passing through its middle. The lower end of this channel is located at the center of the transverse groove, and the upper end is located outside the spiral oiling pump 9. In addition, the size of the centrifugal cavity 7 can be adjusted by adjusting the injection depth of the spiral oil pump 9.

[0054] The crankshaft structure of the refrigeration compressor adopts a spiral centrifugal oil supply system. Through the centrifugal space formed by the spiral oil pump and the oil supply groove inside the crankshaft 4, and the channel connected to it, the lubricating oil can be delivered to the surface of the crankshaft 4 that needs lubrication more efficiently, reducing wear caused by insufficient lubrication.

[0055] The design of the connection part 3 in the shape of a ingot and the rotating part 1 in the shape of a hollow cylinder allows the lubricating oil to be evenly distributed to the upper part of the crankshaft 4, reducing design defects and enhancing the stability and reliability of the compressor.

[0056] The design of the spiral oil path reduces the resistance of oil flow, reduces energy loss caused by blocked oil path, and improves the energy utilization rate of the compressor.

[0057] The design of the inclined oil supply channel allows the lubricating oil to quickly reach the lubricated area, improving the response rate of the system to lubrication needs.

[0058] The maintenance cost of the crankshaft 4 is reduced due to the simplification of the processing steps and the avoidance of the problem of inaccurate inclined oil hole processing, and the maintenance demand caused by oil path blockage is also reduced.

[0059] By reducing friction loss, the working efficiency of the compressor is improved, especially under high load working conditions, this design can significantly improve the performance of the compressor.

[0060] Reducing energy consumption not only reduces operating costs, but also reduces the impact on the environment, meeting the requirements of modern industry for environmental protection and energy saving.

[0061] The size of the centrifugal space can be adjusted by the pressing depth of the spiral oil pump, so that this design can adapt to different types and specifications of compressors, with good universality and adaptability. Optimized oil path design reduces noise and vibration caused by insufficient lubrication, providing a more quiet operating environment.

[0062] In summary, the refrigeration compressor crankshaft 4 structure with spiral centrifugal oil supply system not only improves the performance and working efficiency of the compressor, reduces the maintenance cost and environmental pollution, but also enhances the market competitiveness and adaptability of the product, providing a strong guarantee for the long-term stable operation of the refrigeration compressor.

[0063] The utility model discloses a crankshaft 4 with spiral centrifugal oiling structure through the spiral oiling pump 9 of pressing into the bottom of crankshaft 4, effectively improved the centrifugal oiling amount of traditional inclined oil hole design, promoted the delivery efficiency of lubricating oil. This design is particularly suitable for variable frequency compressor, can guarantee enough oil pressure and oil amount when low speed operation, avoids the lubrication problem caused by the oil pressure shortage, thereby prolongs the equipment life. In addition, the structure allows the depth of pressing of spiral oiling pump 9 to be adjusted according to the height of compressor core, so that the same crankshaft 4 design can adapt to different models of compressor, reduces the multiple models produced due to the length difference of parts, simplifies the inventory management, reduces the production and operation cost, facilitates daily maintenance and replacement work at the same time, improves the efficiency and reliability of the whole compressor system. It needs to be particularly pointed out that the vertical air outlet passage 5 can be connected with the lower end of the spiral crankshaft 4 oil passage 6, and not connected with the centrifugal cavity 7.

[0064] The protection scope of the utility model is not limited to the specific embodiments described in the text, but is determined by the appended claims and the equivalents recognized according to the patent law. This means that all technical solutions that are the same or equivalent in principle and spirit to the utility model are within the protection scope of the utility model. Therefore, the innovation and practicality of the utility model are not limited to the current forms, but also include all possible, reasonable derivations and extensions.

Claims

1. A crankshaft having a spiral centrifugal oiling structure, comprising a crankshaft and a spiral oiling pump, characterized in that, The crankshaft is internally provided with an oiling installation groove, and a centrifugal cavity is formed between the oiling installation groove and a spiral oiling pump. The crankshaft is provided with a connecting part on the upper side, which is in the shape of a silver ingot, and a hollow cylindrical rotating part is further arranged at the top end of the silver ingot-shaped connecting part.

2. The crankshaft having a spiral centrifugal oiling structure according to claim 1, wherein The crankshaft is provided with a spiral crankshaft oil passage on the outer side, and the lower end of the crankshaft oil passage is connected with the upper side passage of the centrifugal cavity.

3. The crankshaft having a spiral centrifugal oiling structure according to claim 1, wherein A U-shaped groove is formed on the outer side of the rotating part, the lower end of the U-shaped groove is a through hole, and a recess is cut at the end close to the center on the upper side of the rotating part.

4. The crankshaft with a spiral centrifugal oiling structure according to claim 1 or 2 or 3, characterized in that, The crankshaft is provided with a vertical gas outlet passage in the middle, an upper side through connecting part, and a lower side oiling installation groove.

5. The crankshaft having a spiral centrifugal oiling structure according to claim 3, wherein The upper end of the spiral oil passage arranged on the outer side of the crankshaft is provided with a pipeline connected with the rotating part.

6. The crankshaft having a spiral centrifugal oiling structure according to claim 1, wherein The spiral oiling pump is provided with a screw thread on the outer side, a horizontal recess on the bottom, and an inclined oiling passage through the middle.

7. The crankshaft having a spiral centrifugal oiling structure according to claim 6, wherein The lower end of the inclined oiling passage is arranged at the center of the horizontal recess, and the upper end of the passage is arranged on the outer side of the spiral oiling pump.

8. The crankshaft having a spiral centrifugal oiling structure according to claim 1, wherein The size of the centrifugal cavity can be adjusted by the pressing depth of the spiral oiling pump.

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