CN210106390U - High-power crankshaft optimization structure - Google Patents

Abstract

The utility model discloses a high-power bent axle optimizes structure, it includes: the length of the crank shaft and the length of the crank shaft of the increased crank shaft are arranged on the radial outer side of each crank shaft crank, the sum of the sizes of each crank shaft and each crank shaft of the increased crank shaft is equal, the rotating diameter of the crank shaft is increased at the position of the connecting rod neck, the rotating inertia of the symmetrical connecting rod neck is balanced, the problem of overlarge crank shaft deflection is solved, the balance of a motor is guaranteed, the problem of overlarge unit vibration is solved, the mechanical efficiency of the whole machine is improved, and the operation cost of enterprises is reduced.

Description

High-power crankshaft optimization structure

Technical Field

The utility model relates to the field of machining, specifically a high-power bent axle optimization structure.

Background

The engine is an energy conversion device and is used for converting the heat energy of gasoline or diesel oil into mechanical energy by expanding gas after the heat energy is combusted in a sealed cylinder to push a piston to do work, and other types of energy can be converted into machines of the mechanical energy, such as an internal combustion engine, an external combustion engine, a motor and the like.

The crankshaft is the most important part in the engine, bears the force transmitted by the connecting rod, converts the force into torque, outputs the torque through the crankshaft and drives other accessories on the engine to work, and the crankshaft is subjected to the combined action of centrifugal force of rotating mass, gas inertia force with periodic change and reciprocating inertia force to bear the action of bending and twisting load. Therefore, the crankshaft is required to have sufficient strength and rigidity, and the surface of the journal needs to be wear-resistant, work uniformly and balance well.

The power of the reciprocating compressor used in the coal chemical industry is from 10KW to 8000KW reciprocating compressor, the piston force is from dozens of kilograms to 125T piston force, the crankshaft form is from 2M, 4M, 6M and 8M crankshaft, the piston force is in alternating load due to the rotary reciprocating motion of the reciprocating compressor, the crankshaft is used as an important transmission part, the design quality of the crankshaft is directly related to the balance and safety of the whole operation of the compressor, and simultaneously, the mechanical efficiency and energy consumption of the whole machine are also related, so the design quality of the crankshaft is more important for a high-power 3000KW to 8000KW power group.

In the prior art, as shown in fig. 1, a conventional crankshaft design process has the problems of unbalanced rotary inertia and overlarge disturbance. The large and large vibration exists in the running process of the unit, and the current of the motor is suddenly high and suddenly low due to the problem of unbalance of the load and the rotary inertia. And excessive vibration of the unit, which results in inefficient operation of the overall compressor. The power loss is between 2% and 8%, an 8M125 compressor, the unit power is 8000KW, the power loss is 160KW-640KW, the power loss is 3840KW-15360KW when working for 24 hours a day, the power loss is 3840 yuan-15360 yuan per day when working for 1 yuan/degree according to industrial electricity, if the operation is 300 days a year, the power loss is 115 ten thousand to 460 ten thousand electric charges per year, thus increasing the operation cost of enterprises. Meanwhile, due to the factors of vibration and instability of the unit operation and the like, the risk of crankshaft fracture can be generated, and if the crankshaft is fractured, the machine body and other parts are damaged, so that the processing and maintenance cost and the cost are continuously increased. The whole production intermediate link is also interrupted. Resulting in material scrap. Increasing the operating cost of the enterprise.

Before the machine body is transformed, the noise value is reduced to 75dB from the original 110dB, the service life of the whole machine is prolonged to 30 years due to the original 8 years, and the vibration value of a machine set is reduced to 15 mu m from the original 25 mu m. The power is reduced by about 5 percent compared with the original power

SUMMERY OF THE UTILITY MODEL

Utility model purpose: in order to solve the not enough of prior art, a high-power bent axle optimize structure, solved bent axle rotary inertia's balanced problem, solved bent axle intensity and the degree of interference under the alternating load simultaneously and had enough factor of safety problem.

The technical scheme is as follows: in order to realize above purpose, a high-power bent axle optimize structure, it includes: the crankshaft, it still includes: and the lengthened crankshaft is positioned at the radial outer side of each crankshaft crank step, and the sum of the sizes of each crankshaft crank and the lengthened crankshaft is equal.

As a further preferred aspect of the present invention, the axial dimension of the extended crankshaft is the same as the axial dimension of the crankshaft.

As a further preference of the utility model, the radial height of extension bent axle the same with symmetry connecting rod strength crank length, balanced symmetry connecting rod neck gyration pivoted inertia, solved the too big problem of bent axle disturbance.

As the utility model discloses a further preferred, bent axle and extension bent axle crank be integrated into one piece's mode connection, guaranteed the reliability and the stability of bent axle work.

As a further preference of the present invention, the distance between two adjacent crankshafts or between the lengthened crankshaft cranks is the same.

Has the advantages that: a high-power bent axle optimized structure, through having increaseed bent axle gyration diameter in connecting rod neck department, balanced symmetrical connecting rod neck gyration pivoted inertia, solved the too big problem of bent axle disturbance degree, guaranteed that the motor is balanced, solved the too big problem of unit vibration, improved complete machine mechanical efficiency, reduced the running cost of enterprise.

Drawings

FIG. 1 is a schematic diagram of a prior art structure;

fig. 2 is a schematic structural diagram of the present invention.

Detailed Description

The invention will be further elucidated with reference to the drawings and the specific embodiments.

As shown in fig. 2, the utility model discloses a high-power bent axle optimized structure, it includes: a crankshaft 1, and an elongated crankshaft 2 located in a radial direction of the crankshaft 1.

The extended crankshafts 2 are located radially outside the step of each crankshaft 1, and the sum of the sizes of each crankshaft 1 and the extended crankshafts 2 is equal.

The rotating diameter of the crank is respectively increased at the connecting rod neck, so that the inertia of the rotating of the symmetrical connecting rod is balanced, and the problem of overlarge crankshaft deflection is solved. The motor balance is ensured. The problem of unit vibration too big is solved. The mechanical efficiency of the whole machine is improved, and the operation cost of enterprises is reduced.

The above embodiments are only for illustrating the technical conception and the features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and to implement the present invention, which cannot limit the protection scope of the present invention. All changes and modifications that come within the spirit of the invention are desired to be protected.

Claims (4)

1. A high-power crankshaft optimizing structure comprises: crankshaft (1), characterized in that: it still includes: the crankshaft structure comprises lengthened crankshaft cranks (2), wherein the lengthened crankshaft cranks (2) are positioned on the radial outer side of steps of each crankshaft (1), and the size of each crankshaft (1) is equal to that of each lengthened crankshaft crank (2).

2. The optimized structure of high-power crankshaft as claimed in claim 1, wherein: the axial dimension of the lengthened crank shaft crank (2) is the same as that of the crank shaft (1).

3. The optimized structure of high-power crankshaft as claimed in claim 1, wherein: the crankshaft (1) and the lengthened crankshaft crank (2) are connected in an integrated forming mode.

4. The optimized structure of high-power crankshaft as claimed in claim 1, wherein: the distance between two adjacent crankshafts (1) or lengthened crankshaft cranks (2) is the same.

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