High-precision multi-eccentric-core compressor crankshaft

Abstract

The utility model discloses a multi-eccentric compressor crankshaft with high precision, which relates to the technical field of compressor crankshafts and comprises a left end shaft and a right end shaft, a first crankshaft arm and a second crankshaft arm are respectively arranged on the left end shaft and the right end shaft, and connecting shafts are arranged in the first crankshaft arm and the second crankshaft arm. A main shaft is arranged between the first crankshaft arm and the second crankshaft arm, and the left end shaft and the right end shaft are each provided with an oil injection hole and an oil storage bin. When the device is used, a good and uniform lubricating effect can be provided between the fixing ring and the connecting shaft, so that the friction force between the fixing ring and the connecting shaft can be effectively reduced, the rotating stability is ensured, the precision of the whole crankshaft can be effectively improved, the device can filter lubricating oil, and the service life of the crankshaft is prolonged. Impurities contained in the lubricating oil are prevented from entering the space between the fixing ring and the connecting shaft, so that abrasion can be avoided, and the rotating precision of the crankshaft can be further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of compressor crankshafts, and particularly relates to a multi-eccentric compressor crankshaft with high precision. Background Technique

[0002] The crankshaft is an important part in a reciprocating compressor. It rotates driven by an electric motor, and thereby drives the piston to reciprocate, so as to realize the cycle of suction, compression, exhaust, and expansion. Such a cycle circulates continuously, and the compression and transportation of gas are realized.

[0003] After retrieval, a crankshaft casting with a self-lubricating mechanism, with the publication number of CN219139615U, includes an assembly end and a connecting rod journal. On the right side of the assembly end, there is a first main journal. Inside both the first crankshaft arm and the second crankshaft arm, there is a connecting rod journal. Inside the assembly end, there is a communicating storage oil sump. On the right side of the communicating storage oil sump and close to the first crankshaft arm, there is a first flow oil passage connected. At the end of the first flow oil passage and close to the connecting rod journal, there is a second flow oil passage connected. On the outer surface of the connecting rod journal, there are overflow oil holes, and on the inner walls of both the first crankshaft arm and the second crankshaft arm, there are oil passages. This crankshaft casting with a self-lubricating structure enables the lubricating oil to be discharged into the second flow oil passage through the arranged communicating storage oil sump, and is discharged to the outside through the overflow oil holes arranged on the connecting rod journal, thereby lubricating the connection between the connecting rod journal and the connecting rod, playing a role of self-lubrication, and being beneficial to the operation and use of this crankshaft.

[0004] Regarding the above related technology, the inventor believes that the above device only discharges the lubricating oil to the outside through the overflow oil holes, which will cause uneven application of the lubricating oil. Therefore, it will also affect the lubrication effect at the connection between the connecting rod journal and the connecting rod, thereby affecting the precision of the entire crankshaft. And the above device does not have a lubricating oil filtering device. When the lubricating oil containing impurities overflows to the connection between the connecting rod journal and the connecting rod, it will cause wear, and further affect the precision of the crankshaft. For this reason, we propose a multi-eccentric compressor crankshaft with high precision. Content of the Utility Model

[0005] In view of the problems existing in the above-mentioned existing multi-eccentric compressor crankshafts with high precision, the present utility model is proposed.

[0006] Therefore, the purpose of the present utility model is to provide a multi-eccentric compressor crankshaft with high precision, which solves the problems that the above device only discharges the lubricating oil to the outside through the overflow oil holes, which will cause uneven application of the lubricating oil. Therefore, it will also affect the lubrication effect at the connection between the connecting rod journal and the connecting rod, thereby affecting the precision of the entire crankshaft. And the above device does not have a lubricating oil filtering device. When the lubricating oil containing impurities overflows to the connection between the connecting rod journal and the connecting rod, it will cause wear, and further affect the precision of the crankshaft.

[0007] To achieve the above object, the present utility model provides the following technical solutions:

[0008] A multi-eccentric compressor crankshaft with high precision, including a left end shaft and a right end shaft. The first crank arm and the second crank arm are respectively provided on the left end shaft and the right end shaft. Connecting shafts are provided in both the first crank arm and the second crank arm. A main shaft is provided between the first crank arm and the second crank arm. Oil injection holes and oil storage bins are provided on both the left end shaft and the right end shaft. First channels are provided in both the left end shaft and the right end shaft. Second channels are provided in both the first crank arm and the second crank arm. An oil delivery bin is provided in the connecting shaft. The oil injection holes, the oil storage bins, the first channels, the second channels and the oil delivery bin are all in a communicating structure. An installation groove is provided in the oil injection hole. A filter screen pocket is placed in the installation groove. A fixing ring is nested on the connecting shaft. A plurality of placement holes are provided on the connecting shaft. A plurality of balls are provided in the plurality of placement holes. A lubricating block is provided on the outer wall of the connecting shaft. The lubricating block is a wool felt block. The outer wall of the lubricating block is in fitting connection with the inner wall of the fixing ring.

[0009] Preferably, a cover plate is provided in the installation groove. Internal threads are provided on the inner wall of the installation groove. External threads are provided on the outer wall of the cover plate. The cover plate and the installation groove are in threaded connection.

[0010] Preferably, a dial plate is provided on the outer wall of the cover plate. The dial plate and the cover plate are of an integral structure. A rubber sleeve is provided on the dial plate.

[0011] Preferably, a sealing gasket is provided on the outer wall of the cover plate.

[0012] Further, the connection part between the oil storage bin and the first channel is of a conical structure.

[0013] Preferably, wear-resistant layers are provided on the outer surface of the ball and the inner surface of the fixing ring. The wear-resistant layer is a metal alloy.

[0014] In the above technical solution, the technical effects and advantages provided by the present utility model are as follows:

[0015] 1. In the present utility model, when in use, not only can the lubricating oil be smeared on the inner wall of the fixing ring through the balls, but also the lubricating block can lubricate the places on the inner wall of the fixing ring that are not lubricated by the balls, so as to ensure the uniformity of lubrication, thereby effectively reducing the friction between the fixing ring and the connecting shaft, ensuring the stability of rotation, effectively improving the precision of the entire crankshaft, and the device can also filter the lubricating oil to prevent impurities contained in the lubricating oil from entering between the fixing ring and the connecting shaft, thus avoiding wear and further improving the rotation precision of the crankshaft. Description of the Drawings

[0016] To more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings.

[0017] Figure 1 It is a schematic diagram of the overall structure of the present utility model;

[0018] Figure 2 It is a schematic cross-sectional structure diagram of the first crankshaft arm of the present utility model;

[0019] Figure 3 It is a schematic enlarged structure diagram of part A of the present utility model.

[0020] Explanation of reference numerals:

[0021] 1, left end shaft; 2, right end shaft; 3, first crankshaft arm; 4, second crankshaft arm; 5, connecting shaft; 6, main shaft; 7, oil injection hole; 8, oil storage bin; 9, first channel; 10, second channel; 11, oil delivery bin; 12, fixing ring; 13, ball; 14, lubricating block; 15, filter screen pocket; 16, cover plate; 17, dial plate. Specific embodiments

[0022] In order to enable those skilled in the art to better understand the technical solutions of the present utility model, the following will further introduce the present utility model in detail in conjunction with the drawings.

[0023] An embodiment of the present utility model discloses a multi-eccentric compressor crankshaft with high precision.

[0024] The present utility model provides a multi-eccentric compressor crankshaft with high precision as shown in Figures 1 - 3 Figure, including a left end shaft 1 and a right end shaft 2. A first crankshaft arm 3 and a second crankshaft arm 4 are respectively provided on the left end shaft 1 and the right end shaft 2. A connecting shaft 5 is provided in both the first crankshaft arm 3 and the second crankshaft arm 4. A main shaft 6 is provided between the first crankshaft arm 3 and the second crankshaft arm 4. Oil injection holes 7 and oil storage bins 8 are provided on both the left end shaft 1 and the right end shaft 2. A first channel 9 is provided in both the left end shaft 1 and the right end shaft 2. A second channel 10 is provided in both the first crankshaft arm 3 and the second crankshaft arm 4. An oil delivery bin 11 is provided in the connecting shaft 5. The oil injection holes 7, the oil storage bins 8, the first channels 9, the second channels 10, and the oil delivery bin 11 are all in a communicating structure. An installation groove is provided in the oil injection hole 7, and a filter screen pocket 15 is placed in the installation groove. A fixing ring 12 is nested on the connecting shaft 5. A plurality of placement holes are provided on the connecting shaft 5, and balls 13 are provided in the plurality of placement holes. A lubricating block 14 is provided on the outer wall of the connecting shaft 5. The lubricating block 14 is a wool felt block, and the outer wall of the lubricating block 14 is in fit connection with the inner wall of the fixing ring 12.

[0025] A multi-eccentric compressor crankshaft with high precision of the present utility model. A cover plate 16 is arranged in the installation groove. Internal threads are provided on the inner wall of the installation groove, and external threads are provided on the outer wall of the cover plate 16. The cover plate 16 is threadedly connected with the installation groove. Through the cover plate 16, the filter screen pocket 15 can be fixed. By connecting with threads, it is convenient to disassemble and assemble the cover plate 16.

[0026] A multi-eccentric compressor crankshaft with high precision of the present utility model. A dial 17 is arranged on the outer wall of the cover plate 16. The dial 17 and the cover plate 16 are of an integral structure. A rubber sleeve is arranged on the dial 17. By setting the dial 17, a force application point can be provided to facilitate driving the cover plate 16 to rotate, thereby improving the convenience in the use process.

[0027] A multi-eccentric compressor crankshaft with high precision of the present utility model. A sealing gasket is arranged on the outer wall of the cover plate 16, which can avoid oil leakage.

[0028] A multi-eccentric compressor crankshaft with high precision of the present utility model. The connection part between the oil storage chamber 8 and the first channel 9 is of a conical structure, which can conveniently guide the lubricating oil inside the oil storage chamber 8 into the first channel 9.

[0029] A multi-eccentric compressor crankshaft with high precision of the present utility model. Wear-resistant layers are provided on the outer surface of the ball 13 and the inner surface of the fixed ring 12. The wear-resistant layer is a metal alloy, which can improve the overall wear resistance and the stability of the entire crankshaft during use.

[0030] During use, lubricating oil is conveyed into the interior of the oil storage chamber 8 through the oil injection hole 7. The internally arranged filter screen pocket 15 can filter the lubricating oil to avoid impurities in the lubricating oil from affecting the subsequent lubrication effect. Then, during use, the lubricating oil will enter the second channel 10 through the first channel 9 and then enter the interior of the oil delivery chamber 11. When the external fixed ring 12 rotates, it will drive the ball 13 to rotate. When the ball 13 rotates, it can smear the lubricating oil inside the oil delivery chamber 11 on the inner wall of the fixed ring 12. And a part of the lubricating oil brought out by the ball 13 will be absorbed by the lubricating block 14. As the fixed ring 12 rotates, the places on the inner wall of the fixed ring 12 that are not lubricated will be smeared with lubricating oil by the lubricating block 14, so as to ensure the uniformity of lubrication, thereby effectively reducing the friction between the fixed ring 12 and the connecting shaft 5, ensuring the stability of rotation, and effectively improving the precision of the entire crankshaft.

[0031] Only some exemplary embodiments of the present utility model have been described by way of illustration. Without doubt, for those of ordinary skill in the art, the described embodiments can be modified in various different ways without departing from the spirit and scope of the present utility model. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present utility model.

Claims

1. A high-precision multi-eccentric compressor crankshaft, comprising a left end shaft (1) and a right end shaft (2), characterized in that: The left end shaft (1) and the right end shaft (2) are respectively provided with a first crank arm (3) and a second crank arm (4); the first crank arm (3) and the second crank arm (4) are both provided with a connecting shaft (5); a main shaft (6) is provided between the first crank arm (3) and the second crank arm (4); the left end shaft (1) and the right end shaft (2) are both provided with an oil filling hole (7) and an oil storage bin (8); the left end shaft (1) and the right end shaft (2) are both provided with a first channel (9); the first crank arm (3) and the second crank arm (4) are both provided with a second channel (10); the connecting shaft (5) is provided with an oil delivery bin ( 11), the oil filling hole (7), the oil storage bin (8), the first channel (9), the second channel (10) and the oil delivery bin (11) are all connected structures, the oil filling hole (7) is provided with a mounting groove, a filter net bag (15) is placed in the mounting groove, a fixing ring (12) is nested on the connecting shaft (5), a plurality of placement holes are opened on the connecting shaft (5), a plurality of placement holes are each provided with a ball (13), a lubricating block (14) is provided on the outer wall of the connecting shaft (5), the lubricating block (14) is a wool felt block, and the outer wall of the lubricating block (14) is fitted and connected to the inner wall of the fixing ring (12).

2. The high-precision multi-eccentric compressor crankshaft according to claim 1, characterized in that: A cover plate (16) is arranged in the installation groove, an inner wall of the installation groove is provided with an internal thread, an outer wall of the cover plate (16) is provided with an external thread, and the cover plate (16) and the installation groove are connected by threads.

3. The high-precision multi-eccentric compressor crankshaft according to claim 2, characterized in that: A shifting plate (17) is provided on the outer wall of the cover plate (16); the shifting plate (17) and the cover plate (16) are in an integrated structure; and a rubber sleeve is provided on the shifting plate (17).

4. The high-precision multi-eccentric compressor crankshaft according to claim 2, characterized in that: A sealing gasket is provided on the outer wall of the cover plate (16).

5. The high-precision multi-eccentric compressor crankshaft according to claim 1, characterized in that: The connection between the oil storage tank (8) and the first channel (9) is a conical structure.

6. The high-precision multi-eccentric compressor crankshaft according to claim 1, characterized in that: The outer surface of the ball (13) and the inner surface of the fixing ring (12) are both provided with a wear-resistant layer, and the wear-resistant layer is a metal alloy.

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