CN213235783U

CN213235783U - Air compressor crankshaft and air compressor

Info

Publication number: CN213235783U
Application number: CN202021737228.6U
Authority: CN
Inventors: 高田田; 赵小兴
Original assignee: Weichai Power Co Ltd
Current assignee: Weichai Power Co Ltd
Priority date: 2020-08-19
Filing date: 2020-08-19
Publication date: 2021-05-18
Anticipated expiration: 2030-08-19

Abstract

The utility model relates to an air compressor machine technical field discloses an air compressor machine bent axle and air compressor machine, and the air compressor machine bent axle includes bent axle main part and inertia piece. The crankshaft main body comprises a front end shaft and a rear end shaft, and a connecting rod journal for movably connecting a crankshaft connecting rod is fixedly connected between the rear end shaft and the front end shaft; the inertia block is fixedly connected to the crankshaft main body and is of a symmetrical structure taking the rotation axis of the crankshaft main body as a symmetry axis, and the gravity center of the inertia block is located on the rotation axis of the crankshaft main body. The utility model discloses an inertia piece of air compressor machine bent axle can the rotational speed of balanced stable bent axle main part, and then alleviates piston air compressor's negative torque to alleviate the tooth problem of beating between the action wheel on the driven wheel of the bent axle tip of adopting gear drive's piston air compressor machine among the prior art and the output of outside power supply, and then realize that piston air compressor's damping falls and make an uproar.

Description

Air compressor crankshaft and air compressor

Technical Field

The utility model relates to an air compressor machine technical field especially relates to an air compressor machine bent axle and air compressor machine.

Background

The piston type air compressor has the advantages of simple structure, long service life and easy realization of high capacity and high pressure output, but has the defects of large vibration, large noise and the like. Therefore, the noise reduction design becomes one of the optimized and improved directions of the piston type air compressor.

At present, a piston type air compressor mainly comprises an air cylinder, a crankshaft connecting rod, an air cylinder piston, an air suction and exhaust valve and the like. When the external power source drives the crankshaft to operate, the crankshaft connecting rod on the crankshaft can drive the cylinder piston to reciprocate in the cylinder, and the compression, exhaust, expansion and suction processes of the refrigerant are completed under the coordination of the suction valve and the exhaust valve. For the piston type air compressor which needs to transmit driving force to the crankshaft through gear transmission by an external power source, vibration noise of the piston type air compressor is mainly caused by unbalanced excitation generated by moving parts of a system. The existing improvement scheme aiming at vibration reduction and noise reduction of the piston type air compressor mainly comprises the steps of adding a sound-proof cover on the periphery of the air compressor or adding a silencer at a position (such as an air inlet) close to a vibration source. However, the solutions can not relieve the problem of vibration noise of the piston type air compressor caused by uneven rotation speed of the crankshaft from the source; especially, in the operation process of the piston type air compressor, when the crankshaft bears negative torque, the rotating speeds of a driving wheel of an external power source and a driven wheel at the end part of the crankshaft are not matched, and then the phenomenon of tooth knocking caused by mutual impact of meshing teeth can occur, so that vibration noise is generated. The negative torque is a reverse torque opposite to a torque direction output by a driving wheel of an external power source to a driven wheel on a crankshaft of the piston type air compressor, and is a torque acted on the crankshaft through a crankshaft connecting rod when a piston of the piston type air compressor reciprocates in a cylinder.

Therefore, it is urgently needed to provide an air compressor crankshaft and an air compressor, which can balance and stabilize the rotating speed of the crankshaft, and further alleviate the negative torque of the piston air compressor, so as to solve the problem of tooth knocking between a driven wheel at the end part of the crankshaft of the piston air compressor and a driving wheel at the output end of an external power source, and realize vibration reduction and noise reduction of the piston air compressor.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an air compressor machine bent axle can the balanced rotational speed of stabilizing the bent axle, and then alleviates piston air compressor machine's negative torque to solve the tooth problem of beating between the action wheel on the bent axle tip of piston air compressor machine from the driving wheel and the output of outside power supply, realize that piston air compressor machine's damping falls and make an uproar.

To achieve the purpose, the utility model adopts the following technical proposal:

an air compressor crankshaft comprising:

the crankshaft main body comprises a front end shaft and a rear end shaft, and a connecting rod journal for movably connecting a crankshaft connecting rod is fixedly connected between the rear end shaft and the front end shaft;

the inertia block is fixedly connected to the crankshaft main body, the inertia block is of a symmetrical structure taking the rotating axis of the crankshaft main body as a symmetry axis, and the gravity center of the inertia block is located on the rotating axis of the crankshaft main body.

Optionally, the inertia block is shaped as a circular cake, and an axis of the inertia block is coaxial with a rotation axis of the crankshaft main body.

Optionally, the inertial mass has a diametric length no greater than the length of the rotational diametric length of the connecting rod journal.

Optionally, the diameter of the inertia mass is equal to the length of the diameter of rotation of the connecting rod journal.

Optionally, the inertia block is detachably and fixedly connected to the crankshaft body.

Optionally, the inertia mass is fixedly attached to the crankshaft body by fastening bolts.

Optionally, the inertia block is integrally and fixedly connected to the crankshaft main body.

Optionally, the crankshaft body further comprises:

the crank arm is characterized in that the connecting rod journal is fixedly connected with the front end shaft and the rear end shaft respectively through the crank arm, the front end shaft and the rear end shaft are coaxial, and the axis of the connecting rod journal is parallel to and not coaxial with the axis of the rear end shaft.

Optionally, the number of the connecting rod journals is two, the number of the crank arms is three, the axis of the rear end shaft is located between the axes of the two connecting rod journals, the axes of the two connecting rod journals and the axis of the rear end shaft are coplanar, the front end shaft is fixedly connected with one of the connecting rod journals through one of the crank arms, the two connecting rod journals are fixedly connected with the second one of the crank arms, and the rear end shaft is fixedly connected with the other connecting rod journal through the third one of the crank arms.

Another object of the utility model is to provide an air compressor machine, can the rotational speed of balanced stable bent axle, and then alleviate piston air compressor machine's negative torque to solve the tooth problem of beating between the action wheel on the bent axle tip of piston air compressor machine from the driving wheel and the output of outside power supply, realize that piston air compressor machine's damping falls and make an uproar.

an air compressor includes an air compressor crankshaft as described above.

The utility model has the advantages that:

the utility model discloses an inertia piece fixed connection of air compressor machine bent axle is in the bent axle main part, and the rotation axis of inertia piece for using the bent axle main part is the symmetrical structure of symmetry axle, and the focus of inertia piece is located the rotation axis of bent axle main part. The inertia block of the air compressor crankshaft can balance and stabilize the rotating speed of the crankshaft main body, and further relieve the negative torque of the piston type air compressor, so that the problem of tooth knocking between a driven wheel at the end part of the crankshaft of the piston type air compressor adopting gear transmission and a driving wheel at the output end of an external power source in the prior art is relieved, and vibration and noise reduction of the piston type air compressor is achieved.

Drawings

Fig. 1 is a schematic structural diagram of an air compressor crankshaft provided by the present invention;

fig. 2 is the utility model provides an air compressor machine's section schematic diagram.

In the figure:

1-a front end shaft; 2-rear end shaft; 3-connecting rod journal; 4-inertia block; 5-a crank arm; 6-crankshaft connecting rod; 7-a piston; 8-cylinder body.

Detailed Description

In order to make the technical problem solved by the present invention, the technical solution adopted by the present invention and the technical effect achieved by the present invention clearer, the technical solution of the present invention will be further explained by combining the drawings and by means of the specific implementation manner.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are used in the orientation or positional relationship shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

As shown in fig. 1-2, the present embodiment provides an air compressor crankshaft and an air compressor having the same. The air compressor crankshaft includes a crankshaft main body and an inertia block 4. The crankshaft main body comprises a front end shaft 1 and a rear end shaft 2, and a connecting rod journal 3 for movably connecting a crankshaft connecting rod 6 is fixedly connected between the rear end shaft 2 and the front end shaft 1; inertia piece 4 fixed connection is in the bent axle main part, and inertia piece 4 is for using the axis of rotation of bent axle main part as the symmetrical structure of symmetry, and the focus of inertia piece 4 is located the axis of rotation of bent axle main part to make its self quality symmetric distribution in the week side of bent axle main part, and then when guaranteeing bent axle main part and rotate, inertia piece 4 and bent axle main part can reach the dynamic balance state. During actual work, a driven wheel is coaxially and fixedly connected with a front end shaft 1 of a crankshaft of the air compressor installed in the air compressor, the driven wheel is in meshing transmission connection with a driving wheel gear on the output end of an external power source, and the external power source can be an engine or a driving motor. The inertia block 4 of the air compressor crankshaft of this embodiment has certain quality by itself, and the specific quality of the inertia block 4 can be adjusted according to the actual design demand is nimble. When the crankshaft main body and the inertia block 4 synchronously rotate, the inertia impulse can be generated by the inertia block 4, and then the rotation speed of the crankshaft main body can be balanced and stabilized by the inertia block 4, so that the retardation influence of negative torque acting on the crankshaft main body by a crankshaft connecting rod 6 of the piston type air compressor on the rotation state of the crankshaft main body is weakened, the problem of tooth knocking between a driven wheel at the crankshaft end of the piston type air compressor adopting gear transmission and a driving wheel at the output end of an external power source in the prior art is solved, and vibration and noise reduction of the piston type air compressor is realized.

Specifically, as shown in fig. 1-2, in this embodiment, the inertia block 4 is shaped like a circular cake, and the axis of the inertia block 4 is coaxial with the rotation axis of the crankshaft body, so as to achieve the effect of balancing and stabilizing the rotation speed of the crankshaft body, and the inertia block 4 has a simple structure and is convenient to machine and manufacture. In other embodiments, the inertia mass 4 may be a sphere, a circular truncated cone, or another symmetrical three-dimensional structure symmetrically distributed with the rotation axis of the crankshaft body as a symmetry axis, so long as the center of gravity of the inertia mass 4 is located on the rotation axis of the crankshaft body, and the inertia mass 4 can stably rotate with the rotation axis of the crankshaft body as a rotation axis.

Further, the diameter length of the cake-shaped inertia block 4 in the embodiment is not greater than the rotation diameter length of the connecting rod journal 3, so that the inertia block 4 has the characteristic of small volume on the premise of ensuring that the inertia block 4 can balance and stabilize the rotation speed of the crankshaft main body, the improvement on the overall structure of the air compressor is reduced as much as possible, and the overall design cost of the air compressor is reduced. Specifically, in this embodiment, as shown in fig. 2, the air compressor crankshaft is installed in a cylinder 8 of the air compressor, the diameter of the inertia block 4 is equal to the length of the rotation diameter of the connecting rod journal 3, and it can provide sufficient inertia impulse for the crankshaft main body to better ensure the stability of the rotation speed of the crankshaft main body, so as to better weaken the influence of negative torque, achieve the effects of vibration and noise reduction, and have small volume, and reduce the improvement of the overall structure of the air compressor as much as possible.

Furthermore, the inertia block 4 is fixedly connected to the crankshaft main body in an integrated manner, and the number of parts can be reduced by the integrated structure, so that the manufacturing cost of the crankshaft of the air compressor is reduced; specifically, in the present embodiment, the inertia mass 4 is integrally fixed to the end of the rear end shaft 2. In other embodiments, the inertia mass 4 may be detachably and fixedly connected to the end of the rear end shaft 2. Specifically, the inertia block 4 is fixedly connected to the crankshaft main body through a fastening bolt, and the inertia block 4 can be replaced, maintained or adjusted independently through the detachable design, so that the maintenance and adjustment cost can be reduced.

And in order to enable the connecting rod journal 3 to be parallel to and non-coaxial with the axis of the rear end shaft 2. The crankshaft main body further comprises a crank arm 5, the connecting rod journal 3 is fixedly connected with the front end shaft 1 and the rear end shaft 2 through the crank arm 5 respectively, the front end shaft 1 and the rear end shaft 2 are coaxial, and the axis of the connecting rod journal 3 is parallel to the axis of the rear end shaft 2 and is not coaxial. Specifically, as shown in fig. 1-2, there are two connecting rod journals 3, three crank arms 5, the axis of the rear end shaft 2 is located between the axes of the two connecting rod journals 3, the axes of the two connecting rod journals 3 and the axis of the rear end shaft 2 are coplanar, the front end shaft 1 is fixedly connected to one of the connecting rod journals 3 through one of the crank arms 5, the two connecting rod journals 3 are fixedly connected to the second crank arm 5, and the rear end shaft 2 is fixedly connected to the other connecting rod journal 3 through the third crank arm 5. The front end shaft 1, the rear end shaft 2 and the connecting rod journal 3 of the air compressor crankshaft in the air compressor of the embodiment are directly fixedly connected through the crank arm 5 in an integrated mode, two pistons 7 can be driven to do work alternately in a reciprocating mode through the two crankshaft connecting rods 6, and the air compressor crankshaft has the advantages of being simple and compact in structure, small in occupied space and the like.

The above description is only for the preferred embodiment of the present invention, and for those skilled in the art, there are variations on the detailed description and the application scope according to the idea of the present invention, and the content of the description should not be construed as a limitation to the present invention.

Claims

1. The utility model provides an air compressor machine bent axle which characterized in that includes:

the crankshaft comprises a crankshaft main body, wherein the crankshaft main body comprises a front end shaft (1) and a rear end shaft (2), and a connecting rod journal (3) for movably connecting a crankshaft connecting rod (6) is fixedly connected between the rear end shaft (2) and the front end shaft (1);

inertia piece (4), inertia piece (4) fixed connection in on the bent axle main part, just inertia piece (4) be for with the axis of rotation of bent axle main part is the symmetrical structure of symmetry axle, the focus of inertia piece (4) is located the axis of rotation of bent axle main part is last.

2. The air compressor crankshaft of claim 1, characterized in that the inertia block (4) is in the shape of a circular cake, the axis of the inertia block (4) being coaxial with the axis of rotation of the crankshaft body.

3. The air compressor crankshaft of claim 2, characterized in that the diameter length of the inertia block (4) is not greater than the rotation diameter length of the connecting rod journal (3).

4. The air compressor crankshaft of claim 3, characterized in that the diameter of the inertia block (4) is equal to the length of the diameter of rotation of the connecting rod journal (3).

5. The air compressor crankshaft of claim 1, characterized in that the inertia block (4) is removably fixed to the crankshaft body.

6. The air compressor crankshaft of claim 5, characterized in that the inertia block (4) is fixedly connected to the crankshaft body by means of fastening bolts.

7. The air compressor crankshaft of claim 1, characterized in that the inertia block (4) is fixedly connected to the crankshaft body in one piece.

8. The air compressor crankshaft of claim 1, wherein said crankshaft body further comprises:

the crank arm (5), the connecting rod journal (3) pass through the crank arm (5) respectively with front end axle (1) with rear end axle (2) fixed connection, front end axle (1) with rear end axle (2) are coaxial, the axis of connecting rod journal (3) with the axis of rear end axle (2) is parallel and not coaxial.

9. The air compressor crankshaft as claimed in claim 8, wherein there are two of said connecting rod journals (3), three of said crank arms (5), the axis of said rear shaft (2) is located between the axes of said two connecting rod journals (3), the axes of said two connecting rod journals (3) and the axis of said rear shaft (2) are coplanar, said front shaft (1) is fixedly connected to one of said connecting rod journals (3) by one of said crank arms (5), two of said connecting rod journals (3) are fixedly connected to the other by the second crank arm (5), and said rear shaft (2) is fixedly connected to the other of said connecting rod journals (3) by the third crank arm (5).

10. An air compressor characterized by comprising the air compressor crankshaft of any one of claims 1 to 9.