CN218934997U

CN218934997U - Thrust bearing bush structure of crankshaft of natural gas engine

Info

Publication number: CN218934997U
Application number: CN202320107323.5U
Authority: CN
Inventors: 俞剑峰; 杨泽雁; 黄澒; 陈凡凡; 吴征; 肖阳
Original assignee: Y&C Engine Co Ltd
Current assignee: Y&C Engine Co Ltd
Priority date: 2023-02-03
Filing date: 2023-02-03
Publication date: 2023-04-28
Anticipated expiration: 2033-02-03

Abstract

The utility model discloses a crankshaft thrust bearing bush structure of a natural gas engine, which comprises a machine body bearing seat, a crankshaft thrust bearing bush and a main bearing cap, wherein the main bearing cap is connected with the machine body bearing seat through bolts, the bolts are screwed to enable the main bearing cap to press the crankshaft thrust bearing bush from below, an arc-shaped oil storage groove is formed in the inner peripheral surface of the crankshaft thrust bearing bush along the circumference, a machine body main oil duct communicated with the arc-shaped oil storage groove is formed in the machine body bearing seat, an oil duct is formed in the main bearing cap, and a main bearing cap bolt hole is communicated with the arc-shaped oil storage groove through the oil duct; thrust plates are arranged on two sides of the thrust bearing bush of the crankshaft, a thrust plate lubrication oil duct is further arranged in the main bearing cover, an inlet of the thrust plate lubrication oil duct is communicated with a bolt hole of the main bearing cover, and an outlet of the thrust plate lubrication oil duct is arranged on the outer side of the thrust plate; the engine lubrication can form a special oil supply channel from the engine body main oil duct to the oil groove formed on the thrust plate through the arc oil storage groove, the oil duct and the thrust plate lubrication oil duct, and the oil supply quantity is ensured to be sufficient.

Description

Thrust bearing bush structure of crankshaft of natural gas engine

Technical Field

The utility model belongs to the technical field of natural gas engines, and particularly relates to a crankshaft thrust bearing bush structure of a natural gas engine.

Background

In various engine products, the high-horsepower natural gas engine is most common because the high-horsepower natural gas engine needs normal gear shifting operation and the pull clutch is used for effectively pulling the crankshaft all the time, so that the abnormal abrasion of the crankshaft thrust plate is caused (the lubrication of bearing bush engine oil is insufficient) because the high-horsepower natural gas engine is high in load and torque and the crankshaft thrust plate is subjected to external force for a long time, and the problem in the prior art is difficult to solve.

Disclosure of Invention

The utility model provides a thrust bearing structure of a crankshaft of a natural gas engine, which solves the problem of abnormal abrasion (insufficient lubrication of bearing bush engine oil) of a thrust plate.

In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:

the utility model provides a natural gas engine bent axle footstep bearing structure, includes organism bearing frame, bent axle footstep bearing and main bearing cap, bent axle footstep bearing is located between organism bearing frame and the main bearing cap, the main bearing cap pass through the bolt with the organism bearing frame is connected, tightens up the bolt makes the main bearing cap compresses tightly bent axle footstep bearing from the below, its characterized in that:

an arc oil storage groove is formed in the inner peripheral surface of the crankshaft thrust bearing bush along the circumference, a main engine body oil gallery communicated with the arc oil storage groove is formed in the engine body bearing seat, an oil gallery is formed in the main engine bearing cover, and a main engine bearing cover bolt hole is communicated with the arc oil storage groove through the oil gallery;

thrust plates are arranged on two sides of the thrust bearing bush of the crankshaft, a thrust plate lubrication oil duct is further arranged in the main bearing cover, an inlet of the thrust plate lubrication oil duct is communicated with a bolt hole of the main bearing cover, and an outlet of the thrust plate lubrication oil duct is arranged on the outer side of the thrust plate.

Preferably, the crankshaft thrust bearing comprises a crankshaft upper thrust bearing and a crankshaft lower thrust bearing which are respectively arranged on the inner peripheral surfaces of the engine body bearing seat and the main bearing cover.

Preferably, the arc oil storage tank comprises an upper bearing bush oil groove formed in the upper thrust shoe of the crankshaft, and a lower bearing bush oil groove formed in the two ends of the lower thrust shoe of the crankshaft in a transitional manner along the circumferential direction of the upper bearing bush oil groove.

Preferably, the widths of the lower bearing bush oil groove and the upper bearing bush oil groove are consistent, and the depth of the lower bearing bush oil groove is reduced inwards from two ends.

Preferably, the thrust plate and the crankshaft thrust bearing are connected in a clamping groove embedding manner;

the outer sides of the thrust plates positioned on the upper thrust shoes of the crankshafts are provided with notch-shaped oil grooves, and a plurality of notch-shaped oil grooves are equidistantly arranged along the circumferential direction of the upper thrust shoes of the crankshafts;

an elliptical oil groove is formed in the outer side of the thrust plate on the lower thrust shoe of the crankshaft, and a plurality of elliptical oil grooves are formed in the circumferential direction of the lower thrust shoe of the crankshaft at equal intervals.

Preferably, the thrust plate lubricating oil duct comprises a transverse oil duct and a longitudinal oil duct which are communicated with each other.

The beneficial effects of adopting above technical scheme are:

the engine lubrication can form a special oil supply channel from a main oil duct of the engine body to an oil groove formed on the thrust plate through an arc oil storage groove, an oil duct and a thrust plate lubrication oil duct, so that the oil supply quantity is ensured to be sufficient; meanwhile, the special oil supply channel enables engine oil to flow and be conveyed from an independent channel, the flowing resistance is small, the channel volume is small, and therefore the engine oil can flow to the thrust plate rapidly and lubricate the thrust plate in time; in addition, by forming the notch-shaped oil grooves and the elliptic-shaped oil grooves, the oil drainage quantity around the thrust plate is increased, and the thrust plate is forcedly lubricated.

Drawings

FIG. 1 is a view of the overall structure of the present utility model;

FIG. 2 is an overall structural view of the thrust bearing of the crankshaft of the present utility model;

FIG. 3 is a partial structural view of the present utility model;

wherein:

1. the engine body bearing seat, 2, the main bearing cover, 3, the bolt, 4, the engine body main oil duct, 5, the arc oil storage tank, 6, the oil duct, 7, the thrust plate, 8, the thrust plate lubrication oil duct, 9, the upper thrust shoe of the crankshaft, 10, the lower thrust shoe of the crankshaft, 11, the notch-shaped oil groove, 12 and the oval-shaped oil groove.

Detailed Description

The following detailed description of the embodiments of the utility model, given by way of example only, is presented in the accompanying drawings to aid in a more complete, accurate and thorough understanding of the concepts and aspects of the utility model, and to aid in its practice, by those skilled in the art.

As shown in fig. 1 to 2, the utility model is a crankshaft thrust bearing structure of a natural gas engine, comprising a machine body bearing seat 1, a crankshaft thrust bearing and a main bearing cap 2, wherein the crankshaft thrust bearing is arranged between the machine body bearing seat 1 and the main bearing cap 2.

In the installation process, the main bearing cap 2 is connected with the engine body bearing seat 1 through a bolt 3 to form a seat hole of a crankshaft, and the bolt 3 is screwed down to enable the main bearing cap 2 to press a thrust bearing of the crankshaft from below; thrust plates 7 are arranged on two sides of the thrust bearing of the crankshaft and used for preventing the axial movement of the crankshaft while ensuring the axial rotation of the crankshaft; in order to improve the compactness of the structure, the thrust plate 7 and the thrust bearing of the crankshaft are connected in a clamping groove embedding mode to complete the assembly.

As shown in fig. 1 to 2, an arc oil storage groove 5 is formed on the inner peripheral surface of the thrust bearing of the crankshaft along the circumference, and a main engine oil duct 4 communicated with the arc oil storage groove 5 is formed inside the engine body bearing seat 1;

further, the arc-shaped oil storage groove 5 comprises an upper bearing bush oil groove formed in the upper thrust shoe 9 of the crankshaft and lower bearing bush oil grooves formed in the two ends of the lower thrust shoe 10 of the crankshaft in a transitional manner along the circumferential direction of the upper bearing bush oil groove; in order to ensure smooth transportation of engine oil, the widths of the lower bearing bush oil groove and the upper bearing bush oil groove are consistent, and the depth of the lower bearing bush oil groove is reduced inwards from two ends.

As shown in fig. 3, an oil duct 6 is formed in the main bearing cover 2, and the bolt hole of the main bearing cover 2 is communicated with the arc-shaped oil storage tank 5 through the oil duct 6; the inside of the main bearing cap 2 is also provided with a thrust plate lubrication oil duct 8, an inlet of the thrust plate lubrication oil duct 8 is communicated with a bolt hole of the main bearing cap 2, and an outlet of the thrust plate lubrication oil duct 8 is arranged at the outer side of the thrust plate 7;

further, the thrust plate lubrication oil passage 8 includes a lateral oil passage and a longitudinal oil passage which are communicated with each other.

It should be noted that, the lubricating oil can flow from the main oil duct 4 to the oil groove formed on the thrust plate 7 through the arc oil storage groove 5, the oil duct 6 and the thrust plate lubricating oil duct 8, so that the lubricating oil can flow between the thrust plate and the crankshaft, the lubricating oil quantity between the thrust plate 7 and the crankshaft is increased, the lubricating condition between the thrust plate 7 and the crankshaft is improved, and lubrication can still be ensured when the lubricating oil is subjected to thrust for a long time; meanwhile, the special oil supply channel enables engine oil to flow and be conveyed from an independent channel, the flowing resistance is small, the channel volume is small, and therefore engine oil can flow to the thrust plate 7 rapidly and lubricate the thrust plate 7 in time; in addition, by forming the notch-shaped oil grooves 11 and the elliptic-shaped oil grooves 12, the adaptability of the engine is improved, the engine can bear larger thrust force, the failure rate of the thrust plate is reduced, and the reliability of the whole engine is improved.

As shown in fig. 2, the crankshaft thrust bearing comprises a crankshaft upper thrust bearing 9 and a crankshaft lower thrust bearing 10 which are respectively arranged on the inner peripheral surfaces of the engine body bearing seat 1 and the main bearing cover 2 and are used for forming a revolute pair with the crankshaft;

in order to increase the oil leakage quantity around the thrust plate 7, the thrust plate 7 is forced to be lubricated, a plurality of notch-shaped oil grooves 11 are formed in the outer side of the thrust plate 7 positioned on the thrust shoe 9 on the crankshaft, and the notch-shaped oil grooves 11 are equidistantly arranged along the circumferential direction of the thrust shoe 9 on the crankshaft; in order to increase the oil leakage quantity around the thrust plate 7, the thrust plate 7 is forced to lubricate, an elliptical oil groove 12 is formed in the outer side of the thrust plate 7 on the lower crankshaft thrust shoe 10, and a plurality of elliptical oil grooves 12 are formed in the circumferential direction of the lower crankshaft thrust shoe 10 at equal intervals.

While the utility model has been described above by way of example with reference to the accompanying drawings, it is to be understood that the utility model is not limited to the particular embodiments described, but is capable of numerous insubstantial modifications of the inventive concept and solution; or the utility model is not improved, and the conception and the technical scheme are directly applied to other occasions and are all within the protection scope of the utility model.

Claims

1. The utility model provides a natural gas engine bent axle footstep tile structure, its characterized in that includes organism bearing frame (1), bent axle footstep tile and main bearing cap (2), bent axle footstep tile is located between organism bearing frame (1) and main bearing cap (2), main bearing cap (2) through bolt (3) with organism bearing frame (1) are connected, screw up bolt (3) make main bearing cap (2) compress tightly bent axle footstep tile from the below, its characterized in that:

an arc oil storage groove (5) is formed in the inner peripheral surface of the crankshaft thrust bearing bush along the circumference, a main engine body oil duct (4) communicated with the arc oil storage groove (5) is formed in the engine body bearing seat (1), an oil duct (6) is formed in the main engine bearing cover (2), and bolt holes of the main engine bearing cover (2) are communicated with the arc oil storage groove (5) through the oil duct (6);

thrust plates (7) are arranged on two sides of the thrust bearing bush of the crankshaft, a thrust plate lubrication oil duct (8) is further arranged in the main bearing cover (2), an inlet of the thrust plate lubrication oil duct (8) is communicated with a bolt hole of the main bearing cover (2), and an outlet of the thrust plate lubrication oil duct (8) is arranged on the outer side of the thrust plate (7).

2. The crankshaft thrust bearing bush structure of the natural gas engine according to claim 1, wherein the crankshaft thrust bearing bush comprises a crankshaft upper thrust bearing bush (9) and a crankshaft lower thrust bearing bush (10) which are respectively arranged on the inner peripheral surfaces of the engine body bearing seat (1) and the main bearing cap (2).

3. A natural gas engine crankshaft thrust bearing structure according to claim 2, wherein the arc-shaped oil storage groove (5) comprises an upper bearing bush oil groove formed in the upper thrust bearing bush (9) of the crankshaft, and lower bearing bush oil grooves formed at two ends of the lower thrust bearing bush (10) of the crankshaft in a transitional manner along the circumferential direction of the upper bearing bush oil groove.

4. A natural gas engine crankshaft thrust bushing structure as in claim 3, wherein said lower bushing oil groove and said upper bushing oil groove are uniform in width and said lower bushing oil groove is shallower from both ends inwardly.

5. A natural gas engine crankshaft thrust bearing structure according to claim 2, characterized in that the thrust plate (7) and the crankshaft thrust bearing are connected in a clamping groove embedding manner;

the outer sides of the thrust plates (7) positioned on the thrust shoes (9) on the crankshafts are provided with notch-shaped oil grooves (11), and a plurality of notch-shaped oil grooves (11) are equidistantly arranged along the circumferential direction of the thrust shoes (9) on the crankshafts;

an elliptical oil groove (12) is formed in the outer side of a thrust plate (7) on the crankshaft lower thrust shoe (10), and a plurality of elliptical oil grooves (12) are formed in the circumferential direction of the crankshaft lower thrust shoe (10) at equal intervals.

6. A natural gas engine crankshaft thrust bearing bush structure according to claim 1, wherein the thrust plate lubrication oil passage (8) comprises a transverse oil passage and a longitudinal oil passage which are communicated with each other.