CN216482722U

CN216482722U - Crank arm difference measuring device for 18PA6B diesel engine

Info

Publication number: CN216482722U
Application number: CN202123257547.4U
Authority: CN
Inventors: 曹磊; 叶光华; 蔡文珍; 刘美钦; 谢威
Original assignee: Fujian Ningde Nuclear Power Co Ltd
Current assignee: Fujian Ningde Nuclear Power Co Ltd
Priority date: 2021-12-22
Filing date: 2021-12-22
Publication date: 2022-05-10
Anticipated expiration: 2031-12-22

Abstract

The utility model discloses a 18PA6B type diesel engine crank arm difference measuring device, including dead lever and adjusting lever, the one end of adjusting lever is equipped with the storage tank of axial extension, be equipped with the elastic component in the storage tank, the one end of dead lever stretches into and butts the elastic component from the opening side of storage tank, the one end of dead lever is spacing on the adjusting lever through limit structure; the adjusting device is characterized by further comprising an adjusting disc and a dial indicator, wherein the adjusting disc is sleeved on the periphery of the adjusting rod, the dial indicator is arranged on the fixing rod, and a measuring rod of the dial indicator abuts against the adjusting disc. This 18PA6B type diesel engine crank arm difference measuring device changes through the relative displacement who measures dead lever and adjusting lever, and it turns into the interval change of device with the interval change of bent arm among the crankshaft rotation process, and rethread amesdial measuring device's interval to this interval measurement crank arm interval, it can improve measurement efficiency and can acquire diesel engine crank arm difference accurate data fast portably, saves the maintenance time limit for a project, reduces the error rate.

Description

Crank arm difference measuring device for 18PA6B diesel engine

Technical Field

The utility model relates to a nuclear power is measured and is overhauld technical field, especially relates to a difference measuring device of 18PA6B type diesel engine crank arm.

Background

The crankshaft is an important part in the diesel engine, the reciprocating motion of a piston is converted into rotary motion to be output, the distance between crank arms is changed due to the abrasion of moving parts in the high-speed rotating and running process of the diesel engine, and whether the crankshaft works in a normal environment or not can be known through measuring the crank arm difference of the diesel engine. However, the distance between the crank arms of the 18PA6B diesel engine is large, the precision needs to reach 0.001mm, and the common measuring tool cannot realize the precision.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide a poor measuring device of 18PA6B type diesel engine crank arm.

The utility model provides a technical scheme that its technical problem adopted is: the crank arm difference measuring device for the 18PA6B diesel engine comprises a fixed rod and an adjusting rod, wherein an axially extending accommodating groove is formed in one end of the adjusting rod, an elastic piece is arranged in the accommodating groove, one end of the fixed rod extends into the accommodating groove from the opening side of the accommodating groove and abuts against the elastic piece, and one end of the fixed rod is limited on the adjusting rod through a limiting structure;

the adjusting device is characterized by further comprising an adjusting disc and a dial indicator, wherein the adjusting disc is sleeved on the periphery of the adjusting rod, the dial indicator is arranged on the fixing rod, and a measuring rod of the dial indicator abuts against the adjusting disc.

Preferably, the elastic member is a coil spring;

and one axial end of the spiral spring is abutted against the axial side surface of the accommodating groove, and the other axial end of the spiral spring is abutted against the axial end part of the fixing rod.

Preferably, the adjustment disc is in threaded connection with the adjustment rod.

Preferably, part of the periphery of the adjusting rod is provided with an external thread;

the adjusting disc is provided with a through hole penetrating through the axial opposite side faces of the adjusting disc, and an internal thread is arranged on the inner periphery of the through hole and matched with the external thread.

Preferably, the adjusting disc is provided with a limiting hole; the limiting hole extends from the circumferential side edge of the adjusting disc and is communicated with the through hole;

the 18PA6B diesel engine crank arm difference measuring device further comprises a limiting piece which penetrates through the limiting hole to abut against the periphery of the adjusting rod so as to limit the adjusting disc to a preset position.

Preferably, the limiting hole is a threaded hole, and the limiting part is a locking bolt.

Preferably, the fixing rod is provided with a mounting groove for mounting the limiting part of the dial indicator;

the 18PA6B type diesel engine crank arm difference measuring device further comprises a fixing piece which is arranged on the side wall of the installation groove in a penetrating mode and the limiting portion of the dial indicator to fix the dial indicator.

Preferably, the limiting structure comprises a waist-shaped hole penetrating through the upper side wall and the lower side wall of the weight containing groove and a section of jack arranged on the fixing rod and positioned in the containing groove;

and the limiting pin penetrates through the waist-shaped hole and the jack to limit one end of the fixing rod in the accommodating groove.

Preferably, the 18PA6B diesel engine crank arm difference measuring device further comprises a controller connected with the dial indicator.

Preferably, the 18PA6B diesel engine crank arm difference measuring device further comprises a data display terminal connected with the dial indicator.

Implement the utility model discloses following beneficial effect has: this 18PA6B type diesel engine crank arm difference measuring device changes through the relative displacement who measures dead lever and adjusting lever, and it turns into the interval change of device with the interval change of bent arm among the crankshaft rotation process, and rethread amesdial measuring device's interval to this interval measurement crank arm interval, it can improve measurement efficiency and can acquire diesel engine crank arm difference accurate data fast portably, saves the maintenance time limit for a project, reduces the error rate.

Drawings

The invention will be further explained with reference to the drawings and examples, wherein:

fig. 1 is a schematic structural diagram of a crank arm difference measuring device of a diesel engine model 18PA6B according to some embodiments of the present invention;

fig. 2 is a schematic structural view of the fixing rod and the adjusting rod according to some embodiments of the present invention.

Detailed Description

In order to clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description, it should be understood that the directions or positional relationships indicated by "front", "back", "upper", "lower", "left", "right", "longitudinal", "horizontal", "vertical", "horizontal", "top", "bottom", "inner", "outer", "head", "tail", etc. are configured and operated in specific directions based on the directions or positional relationships shown in the drawings, and are only for convenience of describing the present invention, but do not indicate that the device or element referred to must have a specific direction, and thus, should not be construed as limiting the present invention.

It should also be noted that, unless expressly specified or limited otherwise, the terms "mounted," "connected," "secured," "disposed," and the like are to be construed broadly and encompass, for example, fixed connections as well as removable connections or integral parts; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or may be connected through the use of two elements or the interaction of two elements. When an element is referred to as being "on" or "under" another element, it can be "directly" or "indirectly" on the other element or intervening elements may also be present. The terms "first", "second", "third", etc. are only for convenience in describing the present technical solution, and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated, whereby the features defined as "first", "second", "third", etc. may explicitly or implicitly include one or more of such features. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Please refer to fig. 1 and 2, which are views illustrating an apparatus for measuring crank arm difference of an 18PA6B diesel engine according to some embodiments of the present invention, including a fixing rod 1 and an adjusting rod 2, wherein one end of the adjusting rod 2 is provided with an accommodating groove 21 extending axially, an elastic member 22 is disposed in the accommodating groove 21, one end of the fixing rod 1 extends from an opening side of the accommodating groove 21 and abuts against the elastic member 22, and one end of the fixing rod 1 is limited on the adjusting rod 2 by a limiting structure.

Still locate the adjusting disk 3 of adjusting lever 2 periphery including the cover to and locate amesdial 4 on the dead lever 1, amesdial 4's gauge rod 42 butt adjusting disk 3 to measure the interval change between dead lever 1 and adjusting lever 2, with this realization indirect measurement crank arm indirect demand. Understandably, the relative displacement change of the fixed rod 1 and the adjusting rod 2 is measured, the change of the distance between the crank arms in the rotation process of the crankshaft is converted into the change of the distance between the crank arms, and then the distance between the crank arms is measured indirectly by measuring the distance between the crank arms by a dial indicator.

Preferably, the elastic member 22 is a coil spring having one axial end abutting against the axial side surface of the accommodation groove 21 and the other axial end abutting against the axial end of the fixing rod 1. Preferably, the limiting structure includes a waist-shaped hole 23 penetrating through the upper and lower side walls of the weight-containing groove, a jack disposed at a section of the fixing rod 1 located in the accommodating groove 21, and a limiting pin 7 penetrating through the waist-shaped hole 23 and the jack to limit one end of the fixing rod 1 in the accommodating groove 21, the waist-shaped hole 23 extends along the length direction (axial direction) of the adjusting rod 2, the length of the limiting pin 7 protrudes out of the upper and lower surfaces of the adjusting rod 2, and the adjusting rod 2 can move within the range of the waist-shaped hole 23. Of course, the waist-shaped hole 23 may be a hole with other shapes, and is not limited herein.

In this embodiment, the adjusting disk 3 is screwed with the adjusting rod 2, and the adjusting disk 3 may be a disk structure or a square plate structure, and a side facing the dial indicator 3 may be further provided with a mark for aligning the measuring rod 42.

Furthermore, the adjusting rod 2 is partially provided with an external thread at the outer periphery thereof, the adjusting disk 3 is provided with a through hole penetrating through the opposite side surfaces in the axial direction thereof, and an internal thread is provided at the inner periphery of the through hole to be matched with the external thread.

Preferably, the adjustment disk 3 is provided with a limit hole extending from a circumferential side edge of the adjustment disk 3 in communication with the through hole, and the 18PA6B diesel crank arm difference measuring device further includes a limit piece 5 penetrating from the limit hole to abut against an outer periphery of the adjustment rod 2 to limit the adjustment disk 3 to a predetermined position. The limiting hole can be a threaded hole, and the limiting part 5 can be a locking bolt. It can be understood that a section of thread is processed on the outer side of the adjusting rod 2, an adjusting disc 3 is installed, the initial position of the adjusting disc 3 is changed by rotating the adjusting disc 3, the measuring rod 42 of the dial indicator 4 is in contact with the adjusting disc 3, and after the position of the adjusting disc 3 is determined, the position of the adjusting disc 3 is locked by screwing a locking bolt on the adjusting disc 3, so that no relative displacement change exists between the adjusting disc 3 and the adjusting rod 2.

Preferably, the fixing rod 1 is provided with a mounting groove for mounting the limiting part 43 of the dial indicator 4, and the 18PA6B diesel crank arm difference measuring device further comprises a fixing part 6 which is arranged on the side wall of the mounting groove and the limiting part 43 of the dial indicator 4 in a penetrating way so as to fix the dial indicator 4. In this embodiment, the housing of the gauge head 41 of the dial gauge 4 is provided with the limiting portion 43, and after the limiting portion 43 is installed in the limiting groove, the fixing member 6 penetrates through the side wall of the installing groove to abut against the limiting portion 43 to fix the limiting portion 43. The fixing member 6 may be a locking bolt or a locking stud, etc. It can be understood that the measuring dial indicator 3 is locked with the fixing rod 12 on the fixing rod 1 through a locking bolt, so that the relative displacement of the measuring dial indicator is not changed.

In some embodiments, the 18PA6B diesel crank arm difference measuring device further comprises a controller (not shown) connected to the dial indicator 4. The dial indicator 4 may be a commercially available intelligent dial indicator, and the controller may control data measurement outside the measurement point, and of course, the dial indicator 4 may measure and display measurement data automatically or manually, and thus, the controller may not be provided.

In some embodiments, the 18PA6B model diesel crank difference measuring device further includes a data display terminal connected to the dial indicator 4, where the data display terminal may be a computer, a tablet computer, a smart phone, or the like, and of course, the data display terminal may not be provided.

The 18PA6B type diesel engine crank arm difference measuring device can improve the measuring efficiency, is mainly designed aiming at the difficulty in measuring the 18PA6B type diesel engine crank arm difference, can quickly and simply obtain the accurate data of the diesel engine crank arm difference, saves the overhaul period and reduces the error rate.

It is to be understood that the foregoing examples merely represent preferred embodiments of the present invention, and that the description thereof is more specific and detailed, but not intended to limit the scope of the invention; it should be noted that, for those skilled in the art, the above technical features can be freely combined, and several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention; therefore, all changes and modifications that come within the meaning and range of equivalency of the claims are to be embraced within their scope.

Claims

1. The 18PA6B type diesel engine crank arm difference measuring device is characterized by comprising a fixing rod (1) and an adjusting rod (2), wherein one end of the adjusting rod (2) is provided with an axially extending accommodating groove (21), an elastic part (22) is arranged in the accommodating groove (21), one end of the fixing rod (1) extends into the accommodating groove (21) from the opening side of the accommodating groove and abuts against the elastic part (22), and one end of the fixing rod (1) is limited on the adjusting rod (2) through a limiting structure;

the adjusting device is characterized by further comprising an adjusting disc (3) sleeved on the periphery of the adjusting rod (2) and a dial indicator (4) arranged on the fixing rod (1), wherein a measuring rod (42) of the dial indicator (4) is abutted to the adjusting disc (3).

2. Model 18PA6B diesel engine crank arm difference measuring device according to claim 1, characterized in that the elastic member (22) is a coil spring;

one axial end of the spiral spring is abutted against the axial side face of the accommodating groove (21), and the other axial end of the spiral spring is abutted against the axial end of the fixing rod (1).

3. Diesel engine crank difference measuring device according to claim 1, of the 18PA6B type, characterized in that the adjusting disk (3) is screwed to the adjusting rod (2).

4. -18 PA6B diesel engine crank arm difference measuring device according to claim 3, characterized in that part of the periphery of the adjusting lever (2) is provided with an external thread;

the adjusting disc (3) is provided with a through hole penetrating through the axial opposite side faces of the adjusting disc, and an internal thread is arranged on the inner periphery of the through hole and matched with the external thread.

5. A diesel engine crank difference measuring device of model 18PA6B according to claim 4, characterized in that the adjusting disc (3) is provided with a limiting hole; the limiting hole extends from the circumferential side edge of the adjusting disc (3) and is communicated with the through hole;

the 18PA6B diesel engine crank arm difference measuring device also comprises a limiting piece (5) which penetrates through the limiting hole to abut against the periphery of the adjusting rod (2) so as to limit the adjusting disc (3) to a preset position.

6. The diesel crank difference measuring device of 18PA6B type according to claim 5, characterized in that the limiting hole is a threaded hole and the limiting member (5) is a locking bolt.

7. The diesel engine crank difference measuring device of 18PA6B type according to claim 1, characterized in that, the fixing rod (1) is provided with a mounting groove for mounting the limiting part of the dial indicator (4);

the 18PA6B type diesel engine crank arm difference measuring device further comprises a fixing piece (6) which penetrates through the side wall of the installation groove and the limiting part of the dial indicator (4) to fix the dial indicator (4).

8. The model 18PA6B diesel engine crank arm difference measuring device of claim 1, wherein the limiting structure comprises a waist-shaped hole (23) penetrating through the upper and lower side walls of the containing groove, and a jack arranged at a section of the fixing rod (1) in the containing groove (21);

and the limiting pin (7) penetrates through the waist-shaped hole (23) and the jack to limit one end of the fixing rod (1) in the accommodating groove (21).

9. A diesel crank difference measuring device model 18PA6B according to claim 1, characterized in that the diesel crank difference measuring device model 18PA6B further comprises a controller connected with the dial indicator (4).

10. A diesel engine crank difference measuring device of model 18PA6B according to claim 1, characterized in that the diesel engine crank difference measuring device of model 18PA6B further comprises a data display terminal connected with the dial indicator (4).