CN221610387U - Crankshaft of air compressor - Google Patents

Abstract

The utility model relates to the technical field of compressors, in particular to an air compressor crankshaft. The crankshaft comprises an eccentric wheel and a crankshaft disc; the eccentric wheel is provided with a first main journal and a through hole, the first main journal is arranged at the left end edge of the eccentric wheel, the through hole is arranged at the end edge of the eccentric wheel in a penetrating way, and the first main journal and the through hole are respectively arranged at two ends of a certain diameter of the eccentric wheel; the crank disc is provided with a second main journal and a connecting rod journal, the second main journal is arranged in the middle of the right end of the crank disc, the connecting rod journal is arranged at the edge of the left end of the crank disc, and the connecting rod journal is inserted into the through hole; the central axis of the eccentric wheel and the central axis of the crank disk are positioned on the same horizontal line, and a plurality of heat dissipation holes which axially penetrate and are uniformly distributed are formed in the eccentric wheel. The eccentric wheel of the crankshaft is provided with a plurality of heat dissipation holes, and the crankshaft is provided with a good crankshaft counterweight through calculation and actual test, has small vibration and also lightens the load of the main bearing.

Description

Crankshaft of air compressor

Technical Field

The utility model relates to the technical field of compressors, in particular to an air compressor crankshaft.

Background

The crankshaft of the air compressor is an important part of the piston compressor which receives the power input by the motor in the form of torque and changes the rotary motion into the linear motion, and the important part is subjected to periodicity in the working process. Complex alternating loads. The existing reciprocating air compressors all need a crankshaft so as to utilize a driving connecting rod to drive a piston to operate and finally convert the rotary motion of a motor into the reciprocating motion of the piston, thereby realizing the compression of air working media.

The crankshafts of current reciprocating air compressors are subjected to a combination of centrifugal forces of rotating masses, periodically varying gas inertial forces and reciprocating inertial forces, thereby subjecting the crankshafts to bending and torsional loads. The existing crankshaft has relatively high counterweight and large vibration, and can give a large load to the bearing.

Disclosure of utility model

In order to solve the technical problems, the utility model aims to provide the crankshaft of the air compressor, wherein the eccentric wheel of the crankshaft is provided with a plurality of heat dissipation holes, and the crankshaft is provided with good crankshaft balancing weight through calculation and actual test, has small vibration and lightens the load of the main bearing.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

the crankshaft of the air compressor comprises an eccentric wheel and a crankshaft disc;

The eccentric wheel is provided with a first main journal and a through hole, the first main journal is arranged at the left end edge of the eccentric wheel, the through hole is arranged at the end edge of the eccentric wheel in a penetrating way, and the first main journal and the through hole are respectively arranged at two ends of a certain diameter of the eccentric wheel;

The crank disc is provided with a second main journal and a connecting rod journal, the second main journal is arranged in the middle of the right end of the crank disc, the connecting rod journal is arranged at the edge of the left end of the crank disc, and the connecting rod journal is inserted into the through hole;

The central axis of the eccentric wheel and the central axis of the crank disk are positioned on the same horizontal line, and a plurality of heat dissipation holes which axially penetrate and are uniformly distributed are formed in the eccentric wheel.

Preferably, the heat dissipation holes are at least provided with five parts, and are circumferentially distributed on the eccentric wheel.

Preferably, the eccentric wheel is further provided with a plurality of mounting holes, and the diameters of the mounting holes are smaller than the diameters of the radiating holes.

Preferably, the right end face of the crank disk is provided with a slant surface facing to the right.

Preferably, an annular groove is formed in the outer diameter of the left end of the first main journal.

Preferably, the second main journal comprises a first shaft body and a second shaft body, two ends of the first shaft body are respectively and fixedly connected with the crank disc and the second shaft body, and the diameter of the first shaft body is larger than that of the second shaft body.

Preferably, a clamping groove is arranged on the outer diameter of the second shaft body.

Preferably, the connecting rod neck comprises a first connecting rod and a second connecting rod, the right end of the first connecting rod is fixedly connected with the left end of the second connecting rod, the right end of the second connecting rod is fixedly connected with the crank disc, the diameter of the first connecting rod is smaller than that of the second connecting rod, and the first connecting rod is inserted into the through hole.

Preferably, the diameter of the eccentric is the same as the diameter of the crank disk.

Preferably, the eccentric wheel and the crank disk are made of 42Crmo materials.

In summary, the utility model has the following advantages:

The design of the uniformly distributed heat dissipation holes enables the heat dissipation of the crankshaft to be improved, the heat productivity of the crankshaft in the rotating process to be reduced, the service life of the support bearing is greatly prolonged, the weight of the crankshaft is reduced, the consumption of rotating energy is reduced, and the application of 42Crmo materials is suitable for parts under alternating load operation.

Drawings

Fig. 1 is a schematic structural view of a crankshaft of the air compressor;

FIG. 2 is a schematic structural view of an eccentric portion;

FIG. 3 is a schematic view of a structure of a crank disk portion;

Reference numerals: 1. an eccentric wheel; 2. a crank disc; 11. a first main journal; 12. a through hole; 13. a heat radiation hole; 14. a mounting hole; 21. a second main journal; 22. a connecting rod neck; 23. an inclined slope; 111. a ring groove; 211. a first shaft body; 212. a second shaft body; 213. a clamping groove; 221. a first link; 222. and a second link.

Detailed Description

The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

In the description of the present application, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present application and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application.

At the same time, it should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

The following describes the embodiments of the present utility model in detail with reference to the drawings.

An air compressor crankshaft comprises an eccentric wheel 1 and a crank disc 2, wherein the eccentric wheel 1 and the crank disc 2 are made of 42Crmo materials, and 42Crmo materials can be applied to parts suitable for alternating load operation.

As shown in fig. 1 to 3, the eccentric wheel 1 is provided with a first main journal 11 and a through hole 12, the first main journal 11 is disposed at the left end edge of the eccentric wheel 1, the through hole 12 is disposed at the end edge of the eccentric wheel 1 in a penetrating manner, and the first main journal 11 and the through hole 12 are disposed at two ends of a certain diameter of the eccentric wheel 1. The ring groove 111 is provided on the outer diameter of the left end of the first main journal 11, and the provision of the ring groove 111 enables the first main journal 11 to be better connected to other devices.

As shown in fig. 1 to 3, the crank 2 is provided with a second main journal 21 and a connecting rod journal 22, the second main journal 21 is disposed in the middle of the right end of the crank 2, the connecting rod journal 22 is disposed at the left edge of the crank 2, and the connecting rod journal 22 is inserted into the through hole 12. A right-side end face of the crank disk 2 is provided with a right-side inclined surface 23.

The second main journal 21 includes a first shaft body 211 and a second shaft body 212, two ends of the first shaft body 211 are respectively and fixedly connected to the crank disk 2 and the second shaft body 212, and the diameter of the first shaft body 211 is larger than that of the second shaft body 212. By providing two shafts of different diameters, the second main journal 21 can be better secured in the middle part of the air compressor.

The second shaft 212 has a clamping groove 213 on its outer diameter, and the clamping groove 213 is provided to enable the crankshaft to be better fixed to other members of the air compressor.

Wherein the central axis of the eccentric wheel 1 and the central axis of the crank disk 2 are positioned on the same horizontal line, and the diameter of the eccentric wheel 1 is the same as the diameter of the crank disk 2.

As shown in fig. 1 to 2, the eccentric wheel 1 is provided with a plurality of heat dissipation holes 13 which penetrate axially and are uniformly distributed. The heat dissipation holes 13 are at least provided with five parts, and are circumferentially distributed on the eccentric wheel 1. And a plurality of mounting holes 14 are also arranged on the eccentric wheel 1, and the diameter of the mounting holes 14 is smaller than that of the radiating holes 13.

Through setting up louvre 13 and mounting hole 14, not only installation that can be better can also make the bent axle reduce in the calorific capacity of rotatory in-process, improves the life of support bearing greatly, lightens the weight of bent axle moreover, has reduced the consumption of rotational energy.

As shown in fig. 1 to 3, the connecting rod neck 22 includes a first connecting rod 221 and a second connecting rod 222, wherein the right end of the first connecting rod 221 is fixedly connected with the left end of the second connecting rod 222, the right end of the second connecting rod 222 is fixedly connected with the crank 2, the diameter of the first connecting rod 221 is smaller than that of the second connecting rod 222, and the first connecting rod 221 is inserted into the through hole 12.

By providing two connecting rods of different diameters, the connecting rod neck 22 can be better fixed in the through hole 12.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art. The generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present utility model is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. The crankshaft of the air compressor is characterized by comprising an eccentric wheel (1) and a crank disc (2);

The eccentric wheel (1) is provided with a first main journal (11) and a through hole (12), the first main journal (11) is arranged at the left end edge of the eccentric wheel (1), the through hole (12) is arranged at the end edge of the eccentric wheel (1) in a penetrating way, and the first main journal (11) and the through hole (12) are respectively arranged at two ends of a certain diameter of the eccentric wheel (1);

The crank disc (2) is provided with a second main journal (21) and a connecting rod neck (22), the second main journal (21) is arranged in the middle of the right end of the crank disc (2), the connecting rod neck (22) is arranged at the left end edge of the crank disc (2), and the connecting rod neck (22) is inserted into the through hole (12);

The central axis of the eccentric wheel (1) and the central axis of the crank disc (2) are positioned on the same horizontal line, and a plurality of radiating holes (13) which axially penetrate and are uniformly distributed are formed in the eccentric wheel (1).

2. An air compressor crankshaft according to claim 1, wherein the heat dissipation holes (13) are provided with at least five parts and are circumferentially distributed on the eccentric wheel (1).

3. An air compressor crankshaft according to claim 1, wherein the eccentric wheel (1) is further provided with a plurality of mounting holes (14), and the diameter of the mounting holes (14) is smaller than the diameter of the heat dissipation holes (13).

4. An air compressor crankshaft according to claim 1, characterized in that the right side end face of the crank disc (2) is provided with a slant surface (23) directed to the right side.

5. An air compressor crankshaft according to claim 1, wherein the first main journal (11) has a ring groove (111) on the outer diameter of the left end.

6. An air compressor crankshaft according to claim 1, wherein the second main journal (21) includes a first shaft body (211) and a second shaft body (212), two ends of the first shaft body (211) are fixedly connected to the crank disc (2) and the second shaft body (212), respectively, and a diameter of the first shaft body (211) is larger than a diameter of the second shaft body (212).

7. An air compressor crankshaft according to claim 6, characterized in that the second shaft body (212) is provided with a clamping groove (213) on its outer diameter.

8. An air compressor crankshaft according to claim 1, wherein the connecting rod neck (22) comprises a first connecting rod (221) and a second connecting rod (222), the right end of the first connecting rod (221) is fixedly connected with the left end of the second connecting rod (222), the right end of the second connecting rod (222) is fixedly connected with the crank disc (2), the diameter of the first connecting rod (221) is smaller than that of the second connecting rod (222), and the first connecting rod (221) is inserted into the through hole (12).

9. An air compressor crankshaft according to claim 1, characterized in that the diameter of the eccentric (1) is the same as the diameter of the crank disc (2).

10. An air compressor crankshaft according to claim 1, characterized in that the eccentric (1) and the crank disk (2) are made of 42Crmo material.