Piston compressor crankshaft with lubricating oil channel

Abstract

The utility model discloses a piston compressor crankshaft with lubricating oil channel, including spindle, install first balance weight on the spindle, install first eccentric shaft on first balance weight, install the connecting block on one side of first eccentric shaft, the one side fixed connection of connecting block has second eccentric shaft, the fixed connection of second eccentric shaft has second balance weight, install the countershaft on one side of second balance weight. The utility model discloses through integrating oil throwing counterweight mechanism and multistage lubricating oil channel system in piston compressor crankshaft, has improved lubricating efficiency and whole machine operation stability significantly, the first lubricating oil channel with second, third, fourth lubricating oil channel intercommunication that sets up in crankshaft, forms the complete oil supply network of covering spindle, eccentric shaft, connecting block and countershaft, ensures that each key friction position obtains sufficient lubrication continuously, effectively reduces abrasion.

Description

Technical Field

[0001] This utility model relates to the field of crankshaft technology, specifically to a piston compressor crankshaft with lubrication oil passages. Background Technology

[0002] The crankshaft is subjected to the combined effects of centrifugal force from the rotating mass, periodically changing gas inertial force, and reciprocating inertial force, resulting in bending and torsional loads. Therefore, the crankshaft is required to have sufficient strength and rigidity, and the journal surface must be wear-resistant, operate evenly, and have good balance.

[0003] In a semi-hermetic refrigeration compressor crankshaft disclosed in announcement number CN215487171U, the first lubricating oil passage axially penetrates the main shaft and extends into the first balance block, the second lubricating oil passage obliquely penetrates the first balance block, the first eccentric shaft, the connecting block, the second eccentric shaft and the second balance block in sequence, and the third lubricating oil passage obliquely penetrates the main shaft and the first balance block in sequence and extends into the first eccentric shaft. The first lubricating oil passage, the second lubricating oil passage and the third lubricating oil passage are all straight channels, and the first lubricating oil hole is located at the bottom of the spherical concave hole.

[0004] In the above technical solution, the surface of the crankshaft is provided with lubricating oil holes that are connected to the lubricating oil passages. When the crankshaft is working, lubricating oil flows out from the lubricating oil holes to play a lubricating role. However, the lubricating oil passages in the crankshaft are not equipped with oil-throwing components, resulting in low lubrication efficiency and inconvenience for oil replenishment. Utility Model Content

[0005] The purpose of this invention is to provide a piston compressor crankshaft with a lubrication oil passage to solve the technical problems of low lubrication efficiency and inconvenience in replenishing oil due to the lack of an oil-throwing component inside the lubrication oil passage.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A piston compressor crankshaft with a lubricating oil passage includes a main shaft, on which a first counterweight is mounted, and on which a first eccentric shaft is mounted. A connecting block is mounted on one side of the first eccentric shaft, and a second eccentric shaft is fixedly connected to one side of the connecting block. A second counterweight is fixedly connected to the second eccentric shaft, and a secondary shaft is mounted on one side of the second counterweight. An oil-throwing counterweight mechanism is detachably connected to the first and second counterweights. The piston compressor crankshaft has a first lubricating oil passage inside.

[0008] As a further embodiment of this utility model, the second balance block has a main oil slinger channel inside, and the main oil slinger channel is connected to a first branch oil slinger channel and a second branch oil slinger channel.

[0009] As a further embodiment of this utility model, a second lubricating oil passage is provided inside the secondary shaft, the second balance block, and the second eccentric shaft, and the second lubricating oil passage is connected to the first lubricating oil passage.

[0010] As a further embodiment of this utility model, the second lubricating oil channel is connected to the first branch oil slinger channel and the second branch oil slinger channel respectively, and a plastic buffer seat is fixedly connected to the end of the main oil slinger channel.

[0011] As a further embodiment of this utility model, a smooth rod is fixedly connected to the end of the main oil slinger, and an annular movable block is sleeved on the smooth rod.

[0012] As a further preferred embodiment of this utility model, the oil-throwing counterweight mechanism is connected to the second balance block by bolts, and the oil-throwing counterweight mechanism is provided with an oil storage chamber inside.

[0013] As a further embodiment of this utility model, the upper end of the oil-throwing counterweight mechanism is fixedly connected to an insertion tube, and the insertion tube has a docking cavity inside.

[0014] As a preferred embodiment of this utility model, a third lubricating oil passage is connected to one side of the first lubricating oil passage, a fourth lubricating oil passage is connected to one side of the third lubricating oil passage, and an oil outlet hole is provided on the connecting block.

[0015] Compared with existing technologies, the piston compressor crankshaft with lubrication oil passages provided by this utility model has the following beneficial effects:

[0016] This invention significantly improves lubrication efficiency and overall machine stability by integrating an oil-throwing counterweight mechanism and a multi-stage lubrication system into the crankshaft of a piston compressor. The first, second, third, and fourth lubrication channels inside the crankshaft are interconnected, forming a complete oil supply network covering the main shaft, eccentric shaft, connecting block, and auxiliary shaft. This ensures continuous and sufficient lubrication of critical friction points, effectively reducing wear and extending service life. Specifically, a main oil-throwing channel and its branches are located within the second balance block and connected to the second lubrication channel. This allows the lubricating oil to be efficiently thrown out under centrifugal force, achieving dynamic and active lubrication. This overcomes the uneven lubrication and low efficiency problems caused by traditional structures relying solely on static oil holes. The oil-throwing counterweight mechanism not only optimizes the crankshaft's dynamic balance as a detachable counterweight element, but its internal oil storage chamber can also temporarily store lubricating oil, participating in the oil-throwing process during high-speed operation to further enhance lubrication. Simultaneously, the mechanism is bolted together, facilitating maintenance, replacement, or replenishment of lubricating oil, solving the problem of inconvenient oil replenishment in existing technologies. The plastic buffer seat at the end of the main oil slinger effectively absorbs vibration and impact, improving operational stability. The smooth rod and the annular movable block work together to sling oil, making lubrication more intelligent and reliable. The overall structure balances strength, rigidity, and lubrication performance, meeting the high requirements of crankshaft for wear resistance, uniform operation, and balance under complex alternating loads. It is suitable for applications with stringent reliability requirements, such as semi-hermetic refrigeration compressors. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only examples of embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0019] Figure 2 This is a schematic diagram of the internal structure of the second balance block in an embodiment of this utility model;

[0020] Figure 3 This is a side view of the structure of the second balance block in an embodiment of this utility model.

[0021] Figure label:

[0022] 1. First lubricating oil passage; 2. Main shaft; 3. Second balance block; 4. Oil outlet; 5. First eccentric shaft; 6. Second eccentric shaft; 7. Connecting block; 8. Oil throwing counterweight mechanism; 9. Sub-shaft; 10. Second lubricating oil passage; 11. First balance block; 12. Third lubricating oil passage; 13. Fourth lubricating oil passage; 31. First branch oil throwing passage; 32. Second branch oil throwing passage; 33. Plastic buffer seat; 34. Main oil throwing passage; 81. Annular movable block; 82. Smooth rod; 83. Connecting cavity; 84. Insert tube; 85. Oil storage cavity. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are only for explaining the present invention and are not intended to limit the present invention.

[0024] In the description of the embodiments of the present invention, it should be understood that the terms "upper", "lower", "front", "rear", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of the present invention.

[0025] In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation", "connection" and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, an integral connection, or a detachable connection; they can refer to the internal connection of two components; they can refer to a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present invention should be understood according to the specific circumstances.

[0026] See Figures 1-3 As shown in the figure, an embodiment of the present invention provides a piston compressor crankshaft with a lubricating oil passage, including a main shaft 2, a first balance block 11 welded on the main shaft 2, a first eccentric shaft 5 welded on the first balance block 11, a connecting block 7 welded to one side of the first eccentric shaft 5, a second eccentric shaft 6 welded to one side of the connecting block 7, a second balance block 3 welded on the second eccentric shaft 6, and a secondary shaft 9 welded to one side of the second balance block 3. An oil-throwing counterweight mechanism 8 is bolted to the first balance block 11 and the second balance block 3 respectively. The oil storage chamber 85 of the oil-throwing counterweight mechanism 8 contains lubricating oil. When the oil is depleted, the oil-throwing counterweight mechanism 8 can be removed, and oil can be added inside the oil storage chamber 85. The piston compressor crankshaft has a first lubricating oil passage 1 inside for conveying lubricating oil, and the surface of the piston compressor crankshaft has multiple lubricating oil holes.

[0027] See Figure 2-3 As shown, the second balance block 3 has a main oil-throwing channel 34 inside, the lower end of which is connected to the oil storage chamber 85. The main oil-throwing channel 34 is connected to a first branch oil-throwing channel 31 and a second branch oil-throwing channel 32. The second lubricating oil channel 10 is connected to both the first branch oil-throwing channel 31 and the second branch oil-throwing channel 32, facilitating the delivery of lubricating oil. The main oil-throwing channel 34 is specially designed inside the second balance block 3, directly connected to the oil storage chamber 85 in the oil-throwing counterweight mechanism 8. This design allows lubricating oil to be effectively introduced from the oil storage chamber 85 into the main oil-throwing channel 34, and then distributed to the entire system through the first branch oil-throwing channel 31 and the second branch oil-throwing channel 32. This multi-stage oil-throwing path not only optimizes the flow direction and speed of the lubricating oil, ensuring the uniformity of the lubrication effect, but also improves the utilization rate of the lubricating oil. Furthermore, the connection between the second lubrication channel 10 and these branch oil channels further ensures that the lubricating oil can efficiently cover all critical parts that require lubrication during high-speed rotation, greatly improving lubrication efficiency and system reliability.

[0028] The secondary shaft 9, the second balance block 3, and the second eccentric shaft 6 have internally formed second lubrication oil passages 10, which communicate with the first lubrication oil passage 1. This design allows lubricating oil to flow in from the first lubrication oil passage 1 of the crankshaft and through a carefully arranged network of channels to these critical components. This layout not only ensures smooth flow of lubricating oil between components but also helps reduce friction and wear, extending the service life of mechanical parts. More importantly, it provides a continuous and stable lubrication environment for the entire crankshaft system, which is crucial for maintaining the long-term stable operation of the compressor.

[0029] A plastic buffer seat 33 is fixedly connected to the end of the main oil slinger 34, and a smooth rod 82 is also fixedly connected to the end of the main oil slinger 34. An annular movable block 81 is fitted onto the smooth rod 82. The annular movable block 81 moves along the smooth rod 82, and the splashed lubricating oil accelerates its entry into the interior of the second lubricating oil passage 10. The plastic buffer seat 33 is used to cushion the lubricating oil from impact damage; while the smooth rod 82 and the annular movable block 81 on it play a role in dynamically regulating the flow of lubricating oil. When the crankshaft rotates, the annular movable block 81 slides along the smooth rod 82 due to centrifugal force. This action not only promotes the rapid diffusion of lubricating oil, but also accelerates its entry into the second lubricating oil passage 10 by agitating the lubricating oil to form a mist or droplets. This method significantly improves the distribution efficiency of lubricating oil at high speeds, thereby better meeting the lubrication requirements of critical moving parts.

[0030] The upper end of the oil-throwing counterweight mechanism 8 is fixedly connected to an insertion tube 84. The insertion tube 84 has a mating cavity 83 inside, and it is inserted into and communicates with the main oil-throwing channel 34. The insertion tube 84 can be directly inserted into the main oil-throwing channel 34, forming a seamless connection. This method ensures that lubricating oil can be smoothly transferred from the oil storage cavity 85 of the oil-throwing counterweight mechanism 8 to the main oil-throwing channel 34, and transmitted unimpeded through the mating cavity 83 inside the insertion tube 84. This design not only simplifies the lubricating oil supply path and reduces potential leakage points, but also facilitates maintenance and repair, because if it is necessary to add lubricating oil or check the lubrication condition, the oil-throwing counterweight mechanism 8 can be disassembled to complete the operation.

[0031] A third lubricating oil passage 12 is connected to one side of the first lubricating oil passage 1, and a fourth lubricating oil passage 13 is connected to one side of the third lubricating oil passage 12. An oil outlet hole 4 is provided on the connecting block 7. The fourth lubricating oil passage 13 is located inside the main shaft 2, and the third lubricating oil passage 12 is located inside the main shaft 2 and the first balance block 11. To ensure effective distribution of lubricating oil throughout the compressor crankshaft system, the first lubricating oil passage 1 is designed to connect with multiple other lubricating oil passages, such as the third lubricating oil passage 12 and the fourth lubricating oil passage 13. The fourth lubricating oil passage 13 is located inside the main shaft 2, while the third lubricating oil passage 12 runs through the space between the main shaft 2 and the first balance block 11. This multi-layered lubricating oil passage layout, along with the oil outlet hole 4 on the connecting block 7, ensures that lubricating oil can accurately reach every location requiring lubrication. For example, lubricating oil can be directly supplied to the area near the connecting block 7 through the oil outlet hole 4, which greatly improves local lubrication conditions, reduces the risk of wear due to insufficient lubrication, and thus enhances the overall system reliability and efficiency.

[0032] In summary, when the crankshaft of the piston compressor with lubrication oil passage of this utility model is working, the lubricating oil first enters the inside of the crankshaft through the first lubrication oil passage 1, and is then transported to the area of ​​the auxiliary shaft 9, the second balance block 3 and the second eccentric shaft 6 via the second lubrication oil passage 10 connected thereto, so as to achieve continuous lubrication of key rotating and eccentric components.

[0033] Meanwhile, the first lubrication channel 1 is divided into the third lubrication channel 12 and the fourth lubrication channel 13. The lubricating oil flows through the main shaft 2 and the interior of the first balance block 11 in sequence, and flows out from the oil outlet 4 on the connecting block 7 to lubricate the connecting parts at specific points, ensuring that the whole machine runs smoothly and wear is reduced.

[0034] The oil-throwing counterweight mechanism 8 installed on the second balance block 3 not only serves a dynamic balancing function, but its internal oil storage chamber 85 also stores lubricating oil. When the crankshaft rotates at high speed, the lubricating oil in the oil storage chamber 85 is connected to the docking chamber 83 through the insertion tube 84 and flows into the main oil-throwing channel 34. The main oil-throwing channel 34 is connected to the second lubricating oil channel 10 through the first branch oil-throwing channel 31 and the second branch oil-throwing channel 32, forming a multi-path oil supply network, which significantly improves lubrication efficiency. Under the action of centrifugal force, the lubricating oil moves upward along the main oil-throwing channel 34, pushing the annular movable block 81 to slide along the smooth rod 82. This process not only agitates the lubricating oil, causing it to atomize or splash, but also accelerates the lubricating oil into the second lubricating oil channel 10, enhancing the dynamic lubrication effect. The plastic buffer seat 33 installed at the end of the main oil-throwing channel 34 can effectively absorb vibration and shock, improving operational stability.

[0035] Furthermore, the oil-throwing counterweight mechanism 8 is detachably connected to the first balance block 11 and the second balance block 3 via bolts. When the lubricating oil in the oil storage chamber 85 is depleted, it can be easily disassembled and replenished, solving the problem of difficult oil replenishment in traditional structures. The entire lubrication system, through the rational layout and welding of the main shaft 2, the first eccentric shaft 5, the second eccentric shaft 6, the connecting block 7, and the countershaft 9, ensures that the crankshaft as a whole has sufficient strength, rigidity, and good balance, effectively coping with the combined loads of rotational centrifugal force, gas inertial force, and reciprocating inertial force, thereby extending the compressor's service life and improving operational reliability and energy efficiency.

[0036] The foregoing has shown and described the basic principles of the present invention. The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. The above embodiments and descriptions in the specification are only illustrative of the principles of the present invention. Any modifications, equivalent substitutions, and improvements made within the scope of the present invention without departing from the scope of the present invention should be included within the protection scope of the present invention.

Claims

1. A crankshaft for a piston compressor with a lubrication oil passage, characterized in that: The compressor includes a main shaft (2), on which a first balance block (11) is mounted, on which a first eccentric shaft (5) is mounted, on which a connecting block (7) is mounted, on which a second eccentric shaft (6) is fixedly connected, on which a second balance block (3) is fixedly connected, on which a secondary shaft (9) is mounted, and on which the first balance block (11) and the second balance block (3) are detachably connected an oil-throwing counterweight mechanism (8). The crankshaft of the piston compressor is provided with a first lubricating oil passage (1).

2. The crankshaft of a piston compressor with lubrication channels according to claim 1, characterized in that: The second balance block (3) has a main oil slinger channel (34) inside, and the main oil slinger channel (34) is connected to a first branch oil slinger channel (31) and a second branch oil slinger channel (32).

3. The crankshaft of a piston compressor with lubrication channels according to claim 2, characterized in that: The second lubricating oil passage (10) is provided inside the sub-shaft (9), the second balance block (3), and the second eccentric shaft (6), and the second lubricating oil passage (10) is connected to the first lubricating oil passage (1).

4. The crankshaft of a piston compressor with lubrication channels according to claim 3, characterized in that: The second lubricating oil passage (10) is connected to the first branch oil slinger (31) and the second branch oil slinger (32) respectively, and the end of the main oil slinger (34) is fixedly connected to a plastic buffer seat (33).

5. A piston compressor crankshaft with lubrication channels according to claim 4, characterized in that: The end of the main oil slinger (34) is fixedly connected to a smooth rod (82), and an annular movable block (81) is fitted on the smooth rod (82).

6. The crankshaft of a piston compressor with lubrication channels according to claim 1, characterized in that: The oil-throwing counterweight mechanism (8) is connected to the second balance block (3) by bolts, and the oil-throwing counterweight mechanism (8) has an oil storage chamber (85) inside.

7. A piston compressor crankshaft with lubricating oil passages according to claim 6, characterized in that: The upper end of the oil-throwing counterweight mechanism (8) is fixedly connected to a tube (84), and the inside of the tube (84) is provided with a docking cavity (83).

8. A piston compressor crankshaft with lubricating oil passages according to any one of claims 1-7, characterized in that: The first lubricating oil passage (1) is connected to a third lubricating oil passage (12) on one side, and the third lubricating oil passage (12) is connected to a fourth lubricating oil passage (13) on one side. The connecting block (7) is provided with an oil outlet hole (4).

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