CN209800622U - Self-balancing crankshaft flywheel set - Google Patents

Abstract

The utility model provides a self-balancing bent axle flywheel group, it includes, bent axle (1) is equipped with flywheel (2), its characterized in that on bent axle (1): a cavity is arranged in the flywheel (2), and filler is arranged in the cavity. The utility model discloses simple structure, processing is convenient, can effectually ensure the equilibrium when bent axle is rotatory.

Description

Self-balancing crankshaft flywheel set

The technical field is as follows:

The utility model belongs to the technical field of mechanical parts and specifically relates to a self-balancing bent axle flywheel group.

Background art:

in a rotating shafting system composed of a crankshaft, a flywheel, a coupling, a connecting rod and the like adopted by the compressor, a main inertia shaft passing through the gravity center of a rotor is not coincident with a rotating axis due to the reasons of uneven material structure, error in the appearance of parts, error in assembly, local asymmetry (such as a key groove) of the structural shape and the like, so that the rotor generates unbalanced centrifugal force during rotation. When the rotor rotates at a high speed, even a small eccentricity causes a very large unbalanced centrifugal force, which becomes one of the main causes of wear of a shaft or a bearing, and vibration of a machine or a base.

All the factors responsible for this unbalanced centrifugal force are random in nature and cannot be found by calculation, and are currently determined and corrected mainly by gravity tests (static balance) and rotation tests (dynamic balance), reducing it to the permissible level.

however, the prior art has the following defects: the static balance and dynamic balance test steps are complicated, and particularly, the dynamic balance needs to be found for multiple times; the dynamic balance test needs a dynamic balancing machine of the revolving door, and the equipment cost investment is large; all static balance and dynamic balance tests need to disassemble parts such as crankshafts, flywheels and the like for independent tests, and shafting formed by the parts cannot be further balanced.

the utility model has the following contents:

The utility model discloses be exactly in order to overcome not enough among the prior art, provide a self-balancing bent axle flywheel assembly.

The application provides the following technical scheme:

The utility model provides a self-balancing bent axle flywheel group, it includes, the bent axle, at the fixed flywheel that is equipped with of one end of the main journal of bent axle, its characterized in that: the flywheel comprises a flywheel body, a flywheel cover plate, a ring groove, a plug and a filler, wherein the ring groove is coaxially distributed on the wheel surface on one side of the flywheel body, the ring cover plate is arranged in an annular shape and correspondingly matched with the ring groove, a through hole penetrating through the flywheel body is formed in the bottom of the ring groove, the plug is correspondingly matched with the through hole, and the filler is filled in the ring groove and is a substance which has certain mass and certain flowing property, such as fine iron sand, small steel balls, mercury, grease, high-concentration salt water and.

On the basis of the technical scheme, the following further technical scheme can be provided:

the through hole is a threaded hole, and one end of the plug is provided with a section of screw rod which is correspondingly matched with the threaded hole.

Utility model advantage:

The utility model discloses simple structure, processing is convenient, can effectually ensure the equilibrium when bent axle is rotatory, reduces the restriction to each part design in the whole rotatory shafting and manufacturing accuracy, and unable whole dynamic balance detects and adjusts in solving rotatory shafting, and the automatic balance adjustment in the rotation makes unbalanced centrifugal force fall to minimumly, reduces the unit vibrations, has guaranteed the reliability when the compressor operates at a high speed.

Description of the drawings:

Fig. 1 is a schematic structural diagram of the present invention.

the specific implementation mode is as follows:

As shown in fig. 1, a self-balancing crankshaft flywheel set, it includes, crankshaft 1, the one end at the main journal of crankshaft 1 is equipped with flywheel 2 through 8 fixed sets of bloating, is equipped with the annular 3 of coaxial distribution on the wheel face of flywheel 2 one side, at the upper end of annular 3, is equipped with an annular 3 and corresponds the annular apron 4 of complex, apron 4 be connected through the wheel face of welded mode with flywheel 2 for form a inclosed cavity 7 in the annular 3.

two through holes 5 penetrating through the flywheel are formed in the bottom of the ring groove 3, and the through holes 5 are threaded holes. The through holes 5 are symmetrically distributed along the axis of the flywheel 2, and the cavity 7 can be communicated with the outside through the through holes 5. The plug 6 correspondingly matched with the through hole 5 is arranged, one section of screw rod 6a correspondingly matched with the threaded hole is arranged at one end of the plug 6, and the plug 6 is screwed to seal the cavity 7 through the corresponding matching of the screw rod and the threads. The plug 6 and the screw 6a are of an integrated structure. In actual use, sealant can be coated on the screw rod or a sealing gasket is sleeved on the screw rod 6a to further seal the through hole 5.

the cavity 7 of the ring groove 3 is filled with a filler (not shown in the figure), wherein the filler is a substance with certain mass and certain flowability, such as fine iron sand, small steel balls, mercury, grease, high-concentration salt water and the like.

When the compressor works in practice, if the filler is found to be too little or too much in the cavity 7, the plug 6 can be unscrewed to increase or decrease the filler in the cavity 7.

The working principle is as follows:

When the flywheel is in rotary motion, the filler in the closed cavity is dispersed out along the normal direction under the action of centrifugal force, the centrifugal force is equal to the unbalanced centrifugal force of the flywheel in magnitude and opposite in direction, the centrifugal force acts on the same straight line, the balance state of the flywheel can be known by a Newton's third law (namely, a two-force balance axiom), and the filler has certain flowability, so that the dynamic compensation function is further realized, namely, the flywheel can be well compensated no matter whether the rotating speed of the flywheel is constant or changed until the flywheel is completely balanced. The balance of the rotation of the flywheel drives the crankshaft to be balanced, and further the rotation balance of a cross head part 10 connected to the crankshaft through a connecting rod part 9 is ensured, so that the balance of the whole rotary shafting system is ensured. The connecting rod part and the crosshead part are both prior art and their connection to the crankshaft is also conventional in the prior art, and the connecting rod part and crosshead part are not directly connected to the solution of the present application, and therefore the structure of the connecting rod part and crosshead part and their connection to the crankshaft are not described in detail here.

Claims (2)

1. the utility model provides a self-balancing bent axle flywheel group, it includes, bent axle (1) is equipped with flywheel (2) on bent axle (1), its characterized in that: the flywheel is characterized in that an annular groove (3) is formed in the flywheel (2), a cover plate (4) corresponding to and matched with the annular groove (3) is arranged, a through hole (5) penetrating through the flywheel (2) is formed in the bottom of the annular groove (3), a plug (6) corresponding to and matched with the through hole (5) is arranged, and fillers are arranged in the annular groove (3).

2. the self-balancing crankshaft flywheel assembly of claim 1, wherein: the through hole (5) is a threaded hole, and one section of screw rod (6 a) correspondingly matched with the threaded hole is arranged at one end of the plug (6).