CN110578745A

CN110578745A - Engine crankshaft thrust device and application

Info

Publication number: CN110578745A
Application number: CN201910951844.7A
Authority: CN
Inventors: 孙思玥; 王黎明; 张峰瑞; 董飞莹
Original assignee: Henan Diesel Heavy Industry Co Ltd
Current assignee: Henan Diesel Heavy Industry Co Ltd
Priority date: 2019-10-09
Filing date: 2019-10-09
Publication date: 2019-12-17
Anticipated expiration: 2039-10-09
Also published as: CN110578745B

Abstract

In order to solve the problem of unreasonable structure of the thrust ring of the engine crankshaft in the prior art, the invention provides an engine crankshaft thrust device and application thereof, wherein the engine crankshaft thrust device comprises a flanging thrust connected with a machine body and a thrust flange connected with a flywheel flange; the engine body is provided with a mounting hole for mounting a crankshaft, and the flywheel flange is provided with a flywheel; the thrust flange is arranged in the flanging and the thrust flanging; the part of the crankshaft arranged in the machine body is arranged in the thrust flange, and the crankshaft, the thrust flange and the flanging thrust are prevented from generating relative axial movement through the raised step structure; the length of the thrust flange is larger than that of the cylindrical section at the crankshaft end. The flywheel and the crankshaft are connected through the thrust flange, and the flanging thrust brake device is used for achieving the axial thrust effect of the crankshaft, so that the flywheel and the crankshaft thrust brake device are convenient to install and high in reliability.

Description

Engine crankshaft thrust device and application

Technical Field

The invention belongs to the technical field of diesel engine manufacturing, and particularly relates to an engine crankshaft thrust device and application thereof.

Background

The crankshaft thrust device is an important device for preventing the axial movement of a crankshaft when an engine works, and on some high-speed and high-power diesel engines, the crankshaft thrust device needs to bear larger axial force, and when the operation working condition is worse, the working life of the crankshaft is determined by the thrust effect, and the reliability of the whole engine of the engine is directly influenced. How to ensure that the thrust device can overcome larger axial force is the key of the working reliability of the crankshaft. Therefore, the thrust device structure and the installation mode must be scientific, reasonable and high in reliability.

Most of existing engine crankshaft thrust structures are installed inside an engine body, for example, the structure is adopted in the patent of 'a crankshaft thrust plate of an internal combustion engine', the thrust device with the structure is complex to disassemble and inspect, and when a thrust ring is damaged, the crankshaft is easily damaged, so that the reliability of the whole engine is influenced, and therefore, the thrust device is very necessary to be optimized and improved.

disclosure of Invention

The invention provides an engine crankshaft thrust device and application in order to solve the problem that an engine crankshaft thrust ring structure in the prior art is unreasonable.

In order to achieve the purpose, the invention adopts the specific scheme that: an engine crankshaft thrust device comprises a flanging thrust connected with a machine body and a thrust flange connected with a flywheel flange; wherein the machine body is provided with a mounting hole for mounting the crankshaft, and the flywheel flange is provided with the flywheel,

Flanges protruding towards the axis of the crankshaft are arranged on the left side and the right side of the flange thrust; the thrust flange is arranged in the flanging and the thrust flanging; the part of the crankshaft arranged in the machine body is arranged in the thrust flange, and the crankshaft, the thrust flange and the flanging thrust are prevented from generating relative axial movement through the raised step structure; the length of the thrust flange is larger than that of the cylindrical section at the crankshaft end.

Wherein, turn-ups thrust comprises four blocks of 90 fan-shapes.

The surfaces of the two flanging anti-thrust flanges are provided with annular oil ducts; wherein, in the annular oil duct; wherein, the annular oil duct is evenly distributed with oil holes inclined towards the axis.

Wherein, the oil hole flanging thrust inner surface forms an included angle of 8 degrees.

Has the advantages that: the flywheel and the crankshaft are connected through the thrust flange, and the axial thrust effect of the crankshaft is realized by using the flanging thrust device, so that the installation is convenient, and the reliability is higher; meanwhile, the quarter ring design of flanging thrust has the advantage of convenient assembly and disassembly while ensuring the thrust effect, and when the thrust is damaged, only the corresponding flanging thrust needs to be replaced, so that the economy is improved to a certain extent; the design of the oil hole and the oil duct on the flanging thrust surface meets the lubricating requirement in the motion process of the crankshaft. Because this thrust device installs in the organism outside and not directly contacts with the bent axle, when the thrust takes place the damage, very little to the influence of bent axle, when examining and changing this thrust device, only need demolising back end cover and flywheel part can, reduce to a certain extent and examine change time and also improve its economic nature simultaneously.

Drawings

FIG. 1 is a schematic cross-sectional view of the structure of the present invention.

FIG. 2 is a front view of the thrust device of the present invention (with the rear end cap, flywheel not installed).

FIG. 3 is a front view of the cuff thrust of the present invention.

FIG. 4 is a schematic view of the location of the oil hole of the present invention.

In the figure: 1. a flywheel; 2. a thrust flange; 3. flanging and thrusting; 4. a rear end cap; 5. bearing bushes; 6. a body; 7. a crankshaft; 8. m8 hexagon socket head cap screw; 9. m10 hexagon socket head cap screw; 10. a flywheel flange; 11. and a positioning pin.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

As shown in figures 1-3, the crankshaft thrust device of the engine comprises a flanging thrust 3 and a thrust flange 2; the right end face of the thrust flange 2 is provided with through holes and pin holes which are consistent with bolt holes at the flywheel end of the crankshaft 7 in number, size and position, and the positioning between the thrust flange and the crankshaft 7 is realized through positioning pins 11; oil holes are uniformly distributed on the outer cylindrical surface of the thrust flange 2, so that engine oil flowing in from the flanging thrust flange 3 can enter between the thrust flange 2 and the crankshaft 7 to realize lubrication, and an oil film with a certain thickness is generated.

The thrust is composed of four semicircular flanged thrust 3 and is connected with the left machine body 6 through an M8 hexagon socket head cap screw 8; the two flanging surfaces of the flanging thrust 3 are respectively provided with oil ducts corresponding to the machine body 6 and the rear end cover 4, so that engine oil flowing through the machine body respectively flows into the positions between the flanging thrust 3 and the machine body 6 and between the flanging thrust 3 and the rear end cover 4, and the lubricating effect is realized.

Meanwhile, as shown in fig. 4, the two flanging surfaces of the flanging anti-thrust 3 are both provided with an annular oil duct 3A; wherein, in the annular oil passage 3A; the annular oil duct 3A is uniformly provided with oil holes 3B inclined towards the axis, so that engine oil can better flow into the space between the flanging thrust 3 and the crankshaft 7, and the lubrication between the flanging thrust 3 and the crankshaft 7 is realized. The flanging design of the flanging and the anti-thrust 3 left and right sides has the advantages that the flanging on the left side is in clearance fit with the end face of the anti-thrust flange 2, and the flanging on the right side is in clearance fit with the boss of the anti-thrust flange 2, so that the anti-thrust function is realized. The length of the thrust flange 2 is slightly longer than the length of a cylindrical section at the end of the crankshaft 7, so that the flanging thrust 3 is not directly contacted with the crankshaft 7 while realizing the thrust function; lubricating oil passing between the crankshaft 7 and the bearing bush 5 enters between the flanging thrust 3 and the crankshaft 7 through a gap under the splashing action, so that the lubricating action is realized; the rear end cover 4 is connected with the machine body 6 through bolts to protect the flanging thrust 3 and the thrust flange 2; the flywheel 1, the flywheel flange 10 and the thrust flange 2 are connected through bolts, and power output is achieved.

The invention relates to a working principle of an engine crankshaft thrust device, which comprises the following steps: the thrust flange 2 realizes the connection between the flywheel 1 and the crankshaft 7, the surface of the thrust flange 2 is provided with bolt holes corresponding to the flywheel end surface of the crankshaft 7 and the surface of the flywheel 1, and the design of the surface pin holes of the thrust flange 2 realizes the position relation between the thrust flange and the crankshaft 7; the flanging thrust 3 is in clearance fit with the crankshaft 7 and the thrust flange 2 respectively, and the flanging thrust 3 can realize leftward thrust of the crankshaft through clearance fit with the thrust flange 2 and the flanging on the left side of the thrust flange 3; when the crankshaft 7 moves rightwards, the flanging thrusts 3 and the thrust flange 2 are in clearance fit, and the flanging on the right side of the thrusting 3 realizes the rightwards thrusting effect of the crankshaft 7.

The quarter ring design of the flanging anti-thrust 3 ensures the anti-thrust effect and has the advantage of convenient assembly and disassembly; the design of the oil hole and the oil duct on the flanging thrust 3 surface meets the lubricating requirement in the motion process of the crankshaft 7. The flanging thrust 3 is located at the shaft end of the crankshaft 7 and is not in direct contact with the crankshaft 7, so that when the flanging thrust 3 needs to be disassembled and inspected, only the flywheel 1, the flywheel flange 10 and the rear end cover 4 need to be disassembled and inspected, the disassembling and inspecting replacement time is reduced to a certain extent, and meanwhile, only the thrust ring of a damaged part needs to be replaced, so that the economical efficiency is improved.

It should be understood that all directional descriptions described herein are based on fig. 1.

The flanges described herein are inverted "concave" shapes.

The above description is only an embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily change or replace the present invention within the technical scope of the present invention. Therefore, the protection scope of the present invention is subject to the protection scope of the claims.

Claims

1. An engine crankshaft thrust device comprises a flanging thrust (3) connected with a machine body (6) and a thrust flange (2) connected with a flywheel flange (10); the flywheel structure is characterized in that flanges protruding towards the axis of the crankshaft (7) are arranged on the left side and the right side of the flange thrust block (3); the thrust flange (2) is arranged in the flanging of the flanging thrust flange (3); the part of the crankshaft (7) arranged in the machine body (6) is arranged in the thrust flange (2), and the crankshaft (7), the thrust flange (2) and the flanging thrust flange (3) are prevented from moving axially relative to each other through a raised step structure; the length of the thrust flange (2) is greater than the length of the cylindrical section at the end of the crankshaft (7).

2. An engine crankshaft thrust device according to claim 1, wherein: the flanging thrust (3) consists of four sectors of 90 degrees.

3. An engine crankshaft thrust device according to claim 1, wherein: the surfaces of the two flanges of the flange thrust block (3) are provided with annular oil ducts (3A); wherein, in the annular oil passage (3A);

Wherein, the annular oil duct (3A) is uniformly distributed with oil holes (3B) inclined towards the axis.

4. An engine crankshaft thrust device according to claim 3, wherein: the oil hole (3B) is flanged and the inner surface of the thrust (3) forms an included angle of 8 degrees.

5. Use of an engine crankshaft thrust block according to any of claims 1 to 4 in a diesel engine.