Crankshaft of reciprocating compressor

Abstract

The utility model relates to the technical field of compressors, and discloses a crankshaft of a reciprocating compressor, which comprises a main journal, balance blocks are fixedly mounted on two sides of the main journal, a first piston rod journal is fixedly mounted on one side, far away from the main journal, of each balance block, and a second connecting handle is fixedly mounted on one side, far away from the corresponding balance block, of each first piston rod journal. A crank is fixedly installed on the side, away from the first piston rod journal, of the second connecting handle, and a second piston rod journal is fixedly installed on the side, away from the second connecting handle, of the crank. Through cooperative use of an oil liquid injection groove and an oil liquid storage groove, the outer edges of the first piston rod journal and the second piston rod journal need to be lubricated, so that when the first piston rod journal and the second piston rod journal are slidably connected with the piston rod in a sleeving mode more smoothly, the first piston rod journal and the second piston rod journal need to be lubricated before the first piston rod journal and the second piston rod journal are not connected with the piston rod; lubricating oil is poured into the inner wall of the oil storage tank through the oil injection tank.

Description

Technical Field

[0001] This utility model relates to the field of compressor technology, specifically to a crankshaft for a reciprocating compressor. Background Technology

[0002] The crankshaft of a reciprocating compressor is one of its core components, mainly responsible for converting rotary motion into the reciprocating motion of the piston.

[0003] The crankshaft assembly of existing reciprocating compressors mainly suffers from the lack of oil lubrication at the joint between the piston rod journal and the piston rod sleeve. Consequently, after prolonged sliding, the piston rod journal and piston rod are prone to wear, thus reducing their actual service life. Utility Model Content

[0004] To address the shortcomings of existing technologies, this invention provides a crankshaft for a reciprocating compressor, which has the advantages of extending the service life of the piston rod journal and piston rod, and improving the wear resistance of the device, thus solving the problems mentioned in the background art.

[0005] This utility model provides the following technical solution: a crankshaft for a reciprocating compressor, including a main journal, with balance blocks fixedly installed on both sides of the main journal, a piston rod journal one fixedly installed on the side of the balance block away from the main journal, a connecting handle two fixedly installed on the side of the piston rod journal one away from the balance block, a crank fixedly installed on the side of the connecting handle two away from the piston rod journal one, a piston rod journal two fixedly installed on the side of the crank away from the connecting handle two, and a connecting handle one fixedly installed on the side of the piston rod journal two away from the crank. An oil injection groove and an oil seepage groove are formed along the outer edges of the piston rod journal one and piston rod journal two, and an oil storage groove is formed at the bottom of the inner wall of the oil injection groove.

[0006] As a preferred technical solution of this utility model: the number of the first connecting handle is two, and an output end connecting rod is fixedly installed at one end of the first connecting handle, and a wear-resistant coating is fixedly installed at the end of the second set of the first connecting handles away from the output end connecting rod.

[0007] As a preferred technical solution of this utility model: the diameter of the oil injection groove is larger than the diameter of the oil seepage groove, and the number of main journals is three, divided into two groups. The first group of main journals is located between two balance blocks, and the second group of main journals is located between the connecting shank and the crank.

[0008] As a preferred technical solution of this utility model: the outer surfaces of the main journal, balance block, piston rod journal one, crank, piston rod journal two, round rod, and output end connecting rod are all provided with a wear-resistant coating, and the wear-resistant coating is a high-entropy alloy coating.

[0009] As a preferred technical solution of this utility model: the number of oil seepage grooves is several, and they are arrayed on the outer edges of piston rod journal one and piston rod journal two.

[0010] As a preferred technical solution of this utility model: the number of the balance block, piston rod journal one, connecting handle two, crank, and piston rod journal two are all two sets, and they are symmetrically distributed on both sides of the main journal.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] 1. The crankshaft of this reciprocating compressor requires lubrication of the outer edges of piston rod journals one and two through the combined use of an oil injection tank and an oil storage tank. This lubrication ensures smoother sliding between piston rod journals one and two and the piston rod. Before connecting piston rod journals one and two to the piston rod, lubricating oil should be poured into the inner wall of the oil storage tank through the oil injection tank. Then, piston rod journals one and two should be quickly connected to the piston rod. Once the device is operating, lubricating oil is released through piston rod journal one... When the piston rod rotates with piston journal two, due to the influence of centrifugal force and the opening of the oil seepage groove, the lubricating oil in the oil storage tank can seep out through the oil seepage groove to the contact surfaces of piston journal one and piston journal two with the piston rod, thereby achieving the purpose of lubricating piston journal one and piston journal two and the piston rod, making the sliding sleeve between piston journal one and piston journal two and the piston rod smoother, and thus extending the service life of piston journal one and piston journal two and the piston rod.

[0013] 2. The crankshaft of this reciprocating compressor is coated with a wear-resistant coating made of high-entropy alloy. The high-entropy alloy coating has high hardness, thermal stability and uniform microstructure, which exhibits excellent wear resistance and heat resistance in high-temperature environments. This improves the wear resistance and heat resistance of the device, thereby reducing the problem of easy softening due to high temperature and easy damage and deformation due to wear when the device is located in the chamber, and improving the actual service life of the device. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0015] Figure 2 This is a schematic diagram of the structure of this utility model from below;

[0016] Figure 3 This is a schematic cross-sectional view of the present invention.

[0017] Figure 4This utility model Figure 3 A magnified schematic diagram of the structure at point A.

[0018] In the diagram: 1. Main journal; 2. Balance block; 3. Piston rod journal one; 4. Crank; 5. Piston rod journal two; 6. Round rod; 7. Oil injection tank; 8. Oil seepage tank; 9. Oil storage tank; 10. Output end connecting rod; 11. Wear-resistant coating; 12. Connecting handle one; 13. Connecting handle two. 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] Please see Figures 1-4 A crankshaft for a reciprocating compressor includes a main journal 1. Balance blocks 2 are fixedly mounted on both sides of the main journal 1. A piston rod journal 3 is fixedly mounted on the side of the balance block 2 away from the main journal 1. A connecting handle 13 is fixedly mounted on the side of the piston rod journal 3 away from the balance block 2. A crank 4 is fixedly mounted on the side of the connecting handle 13 away from the piston rod journal 3. A piston rod journal 5 is fixedly mounted on the side of the crank 4 away from the connecting handle 13. A connecting handle 12 is fixedly mounted on the side of the piston rod journal 5 away from the crank 4. An oil injection groove 7 and an oil seepage groove 8 are formed along the outer edges of the piston rod journal 3 and piston rod journal 5. An oil storage groove 9 is formed at the bottom of the inner wall of the oil injection groove 7.

[0021] In the above structure, through the combined use of the oil injection tank 7 and the oil storage tank 9, it is necessary to lubricate the outer edges of piston rod journal 1 3 and piston rod journal 2 5 to ensure smoother sliding engagement between piston rod journal 1 3 and piston rod journal 2 5 and the piston rod. Before piston rod journal 1 3 and piston rod journal 2 5 are connected to the piston rod, lubricating oil needs to be poured into the inner wall of the oil storage tank 9 through the oil injection tank 7. Then, piston rod journal 1 3 and piston rod journal 2 5 are quickly fitted onto the piston rod. When the device is working, through the piston rod journal 1 3 and piston rod journal 2 5... When the piston rod rotates due to the centrifugal force and the opening of the oil seepage groove 8, the lubricating oil in the oil storage tank 9 can seep out through the oil seepage groove 8 to the contact surfaces of the piston rod journal 1 and piston rod journal 2 and piston rod, thereby achieving the purpose of lubricating the piston rod journal 1 and piston rod journal 2 and piston rod, making the sliding connection between the piston rod journal 1 and piston rod journal 2 and piston rod smoother, and thus extending the service life of the piston rod journal 1 and piston rod journal 2 and piston rod.

[0022] In a preferred embodiment: there are two connecting handles 12, and one end of the connecting handle 12 is fixedly installed with an output end connecting rod 10, and the end of the second connecting handle 12 away from the output end connecting rod 10 is fixedly installed with a wear-resistant coating 11.

[0023] In the above structure, the output end connecting rod 10 is connected to the output shaft of the drive device, and the drive device can drive the device to rotate. Thus, the piston rod is smoothly driven to work by the rotation of piston rod journal 3 and piston rod journal 5.

[0024] In a preferred embodiment: the diameter of the oil injection tank 7 is larger than the diameter of the oil seepage tank 8, and there are three main journals 1, which are divided into two groups. The first group of main journals 1 is located between the two balance blocks 2, and the second group of main journals 1 is located between the connecting handle 13 and the crank 4.

[0025] In the above structure, since the diameter of the oil seepage tank 8 is smaller than the diameter of the oil injection tank 7, the oil seepage tank 8 needs to be driven by a drive device to operate, and then the centrifugal force generated by the device is used to seep out better and faster.

[0026] In a preferred embodiment: the outer surfaces of the main journal 1, the balance block 2, the piston rod journal 1 3, the crank 4, the piston rod journal 2 5, the round rod 6, and the output end connecting rod 10 are all provided with a wear-resistant coating 11, which is a high-entropy alloy coating.

[0027] In the above structure, the wear-resistant coating 11 made of high-entropy alloy coating exhibits excellent wear resistance and heat resistance in high-temperature environments due to the high hardness, thermal stability and uniform microstructure of the high-entropy alloy coating, thereby improving the wear resistance and heat resistance of the device. As a result, when the device is located in the chamber, it reduces the problem of easy softening due to high temperature and easy damage and deformation due to wear, thus improving the actual service life of the device.

[0028] In a preferred embodiment, there are several oil seepage grooves 8, which are arranged in an array along the outer edges of piston rod journal 1 3 and piston rod journal 2 5.

[0029] In the above structure, the distribution of several oil seepage grooves 8 further facilitates the seepage of lubricating oil.

[0030] In a preferred embodiment: the number of balance block 2, piston rod journal 1 3, connecting handle 2 13, crank 4, and piston rod journal 2 5 are all two sets, and are symmetrically distributed on both sides of the main journal 1.

[0031] In the above structure, the main shaft journal 1 can provide support for the device.

[0032] Working Principle: When this device is needed, firstly, the oil injection tank 7 and the oil storage tank 9 are used together. Then, to lubricate the outer edges of piston rod journal 1 (3) and piston rod journal 2 (5) and to ensure smoother sliding between piston rod journal 1 (3) and piston rod journal 2 (5) and the piston rod, lubricating oil is poured into the inner wall of the oil storage tank 9 through the oil injection tank 7 before connecting piston rod journal 1 (3) and piston rod journal 2 (5) to the piston rod. Then, piston rod journal 1 (3) and piston rod journal 2 (5) are quickly connected to the piston rod. When the device is working, as the piston rod rotates due to the piston rod journal 1 (3) and piston rod journal 2 (5), the lubricating oil in the oil storage tank 9 can flow through the oil seepage tank 8 to the piston rod. The contact surfaces of piston rod journal 1 (3) and piston rod journal 2 (5) with the piston rod are immersed, thereby achieving the purpose of lubrication of piston rod journal 1 (3) and piston rod journal 2 (5) and the piston rod. This makes the sliding connection between piston rod journal 1 (3) and piston rod journal 2 (5) and the piston rod smoother, thus extending the service life of piston rod journal 1 (3) and piston rod journal 2 (5) and the piston rod. Secondly, the wear-resistant coating 11 made of high-entropy alloy coating exhibits excellent wear resistance and heat resistance in high-temperature environments due to the high hardness, thermal stability and uniform microstructure of the high-entropy alloy coating. This improves the wear resistance and heat resistance of the device, thereby reducing the problem of easy softening due to high temperature and easy damage and deformation due to wear when the device is located in the chamber, thus improving the actual service life of the device.

[0033] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A crankshaft for a reciprocating compressor, comprising a main journal (1), characterized in that: Balance blocks (2) are fixedly installed on both sides of the main journal (1). A piston rod journal (3) is fixedly installed on the side of the balance block (2) away from the main journal (1). A connecting handle (13) is fixedly installed on the side of the piston rod journal (3) away from the balance block (2). A crank (4) is fixedly installed on the side of the connecting handle (13) away from the piston rod journal (3). A piston rod journal (5) is fixedly installed on the side of the crank (4) away from the connecting handle (13). A connecting handle (12) is fixedly installed on the side of the piston rod journal (5) away from the crank (4). An oil injection groove (7) and an oil seepage groove (8) are opened on the outer edge of the piston rod journal (3) and the piston rod journal (5). An oil storage groove (9) is opened at the bottom of the inner wall of the oil injection groove (7).

2. The crankshaft of a reciprocating compressor according to claim 1, characterized in that: There are two connecting handles (12), and one end of the connecting handle (12) is fixedly installed with an output end connecting rod (10). The end of the second set of connecting handles (12) away from the output end connecting rod (10) is fixedly installed with a wear-resistant coating (11).

3. The crankshaft of a reciprocating compressor according to claim 1, characterized in that: The diameter of the oil injection tank (7) is larger than the diameter of the oil seepage tank (8). There are three main journals (1), which are divided into two groups. The first group of main journals (1) is located between two balance blocks (2), and the second group of main journals (1) is located between connecting handle two (13) and crank (4).

4. The crankshaft of a reciprocating compressor according to claim 1, characterized in that: The outer surfaces of the main journal (1), balance block (2), piston rod journal one (3), crank (4), piston rod journal two (5), round rod (6), and output end connecting rod (10) are all provided with wear-resistant coating (11), which is a high-entropy alloy coating.

5. The crankshaft of a reciprocating compressor according to claim 1, characterized in that: The number of oil seepage grooves (8) is several, and they are arranged in an array along the outer edges of piston rod journal one (3) and piston rod journal two (5).

6. The crankshaft of a reciprocating compressor according to claim 3, characterized in that: The number of the balance block (2), piston rod journal one (3), connecting handle two (13), crank (4), and piston rod journal two (5) are all two sets, and they are symmetrically distributed on both sides of the main journal (1).

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