CN206514779U - A kind of clearance measurement tool - Google Patents

Abstract

The utility model discloses a gap measuring tool, which relates to the technical field of engine assembly. The gap measurement tool includes a reference rod (1), a measuring probe (2) and a measuring table; the reference rod (1) is provided with a through hole connecting the two ends in the length direction, and the outside of the reference rod (1) is provided with a positioning Boss (11); the measuring probe (2) is slidingly fitted with the through hole inside the reference rod (1); the measuring gauge is installed on one end of the reference rod (1), and the measuring gauge The measuring rod is connected with one end of the measuring probe (2). The utility model has the advantages that: the utility model realizes the measurement of the gap between the installation end surface of the speed sensor and the speed gear, and has high measurement precision, easy installation and disassembly, safety and reliability, and is easy to realize.

Description

A Gap Measuring Tool

technical field

The utility model relates to the technical field of engine assembly, in particular to a gap measuring tool.

Background technique

The aero-engine with high bypass ratio measures the speed of the fan rotor through the speed sensor. To ensure the accuracy of the value measured by the speed sensor, it is necessary to install an adjustment pad to ensure the gap between the speed sensor and the speed gear. To calculate the thickness of the adjusting pad, it is necessary to measure the distance from the end face of the speed sensor to the speed gear. Due to the deep installation position of the speed sensor, it cannot be measured by conventional means. In the past, there was no effective measurement tool to ensure the gap between them, and the measurement method has always been in a blank state.

The existing measurement method is to measure with a depth gauge, which has low precision and cannot accurately reflect the real value of the measured part of the back.

Utility model content

The purpose of the present utility model is to provide a gap measuring tool to solve or at least alleviate at least one problem existing in the background art.

The technical solution adopted by the utility model is: to provide a gap measurement tool, including a reference rod, a measurement probe and a measurement table;

The reference rod is provided with a through hole connecting both ends in the length direction, and a positioning boss is provided outside the reference rod;

The measuring probe is slidingly fitted with the through hole inside the reference rod;

The measuring meter is installed at one end of the reference rod, and the measuring rod of the measuring meter is connected with one end of the measuring probe.

Preferably, the end of the measuring probe away from the measuring gauge is set in a conical structure, the large conical end of the conical structure is close to the measuring gauge, and the small conical end of the conical structure is away from the measuring gauge.

Preferably, the end surface of the small conical end of the conical structure is set as a spherical surface.

Preferably, the gap measurement tool also includes a nut; the through hole provided on the reference rod includes two sections, one end close to the measuring table is set as a threaded hole, and the end far away from the measuring table is set as a light hole; The measuring gauge is installed on the reference rod through the nut.

Preferably, the positioning boss includes two, and the two positioning bosses are arranged in parallel in the length direction of the reference rod.

Preferably, the measuring probe is detachably connected to the measuring rod of the measuring meter.

Preferably, the gap measurement tool further includes a copper sleeve, the copper sleeve is matched with the light hole of the reference rod, and the measuring probe is installed in the copper sleeve.

Preferably, the gap measuring tool further includes a positioning knob mounted on the side wall of the reference rod for fixing the position of the measuring probe.

Preferably, the contact portion between the positioning knob and the measuring probe is made of pure copper or non-metallic material.

The beneficial effects of the utility model are:

The utility model realizes the measurement of the gap between the installation end face of the rotational speed sensor and the rotational speed gear, and has high measurement precision, simple installation and disassembly, safety and reliability, and easy realization.

Description of drawings

FIG. 1 is a schematic diagram of a gap measuring tool according to an embodiment of the present invention.

FIG. 2 is a schematic diagram of the gap measuring tool shown in FIG. 1 when it is zeroed.

Fig. 3 is a schematic diagram of the gap measuring tool shown in Fig. 1 during measurement.

Among them, 1-reference rod, 2-measuring probe, 11-positioning boss, 3-nut, 4-speed gear, 5-reference fast, 6-platform.

detailed description

In order to make the purpose, technical solutions and advantages of the utility model more clear, the technical solution in the utility model embodiment will be described in more detail below in conjunction with the accompanying drawings in the utility model embodiment. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are some embodiments of the present utility model, but not all embodiments. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention, but should not be construed as limiting the present invention. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model. Embodiments of the utility model will be described in detail below in conjunction with the accompanying drawings.

In describing the present invention, it should be understood that the terms "central", "longitudinal", "transverse", "front", "rear", "left", "right", "vertical", "horizontal" , "top", "bottom", "inner", "outer" and other indicated orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, rather than indicating or It should not be construed as limiting the protection scope of the present invention by implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation.

As shown in Figures 1 to 3, a gap measurement tool includes a reference rod 1, a measuring probe 2 and a measuring table; The boss 11; the measuring probe 2 is slidably matched with the through hole inside the reference rod 1; The sliding distance of the measuring probe 2 in the through hole of the reference rod 1 can be observed through the measuring table, so as to realize the measurement of small gaps. The measuring probe 2 can be set as a cylindrical rod with a smaller diameter. Through the positioning of the external positioning boss 11, the measurement of the gap value at a deeper position can be realized, and the gap value can be accurately determined by measuring the vertical change on the gauge.

In this embodiment, the end of the measuring probe 2 away from the measuring gauge is configured as a conical structure, the large conical end of the conical structure is close to the measuring gauge, and the small conical end of the conical structure is away from the measuring gauge. The advantage is that the small end of the conical structure is in contact with the side of the quilt, which reduces the contact area, avoids the influence of the measurement probe on the accuracy of the measurement result due to the uneven end surface, and makes the measurement result more accurate.

Specifically, in this embodiment, the end surface of the small conical end of the conical structure is set as a spherical surface. It can be understood that the small end of the conical structure can also be set as a planar structure, and the plane of the planar structure is found to be parallel to the axis of the measuring probe.

In this embodiment, the gap measuring tool also includes a nut 3; the through hole provided on the reference rod 1 includes two sections, one end close to the measuring table is set as a threaded hole, and one end away from the measuring table is set as a light hole. hole, and the diameter of the threaded hole is larger than the diameter of the light hole; the measuring gauge is installed on the reference rod 1 through the nut 3. The advantage is that the replacement and maintenance of the measuring meter is convenient. It can be understood that, according to the requirements of measurement accuracy, the measuring gauge can be a dial gauge or a dial gauge.

In this embodiment, there are two positioning bosses 11 , and the two positioning bosses 11 are arranged in parallel along the length direction of the reference rod 1 . The advantage is that the positioning boss 11 can be positioned in cooperation with the measurement hole, preventing the reference rod 1 from tilting and affecting the measurement accuracy. By providing two positioning bosses 11, an annular groove is formed between the two positioning bosses 11, which reduces the weight of the reference rod 1. It can be understood that one positioning boss 11 can also be provided to increase the size of the positioning boss 11 in the length direction of the reference rod 1 , which has the advantage of convenient processing and can enhance the strength of the reference rod 1 .

In this embodiment, the measuring probe 2 is detachably connected to the measuring rod of the measuring meter. The advantage is that the measuring probe 2 and the measuring meter can be separated as a single piece, and can be repaired and replaced as a single piece.

It can be understood that the gap measuring tool may also include a copper sleeve. For example, in an alternative embodiment, the copper sleeve is matched with the light hole of the reference rod 1, and the measuring probe 2 is installed in the copper sleeve. The advantage is that the copper sleeve has better wear resistance, can prevent the sliding wear between the measuring probe 2 and the reference rod 1, and improve the measurement accuracy.

It can be understood that the gap measurement tool also includes a positioning knob. For example, in an alternative embodiment, the positioning knob is installed on the side wall of the reference rod 1, the axis of the positioning knob is perpendicular to the axis of the measuring probe 2, and the positioning knob is connected with the reference rod 1 through threads for fixing The position of the measuring probe 2. The contact portion between the positioning knob and the measuring probe 2 can be made of pure copper or non-metallic material. The advantage is that the pure copper material and the non-metallic material are relatively soft and will not damage the measuring probe 2 .

For example, when it is necessary to measure the distance between the speed sensor and the speed gear, place the reference block 5 on the platform 6 before gap measurement, and make the reference block and the platform closely fit without gap. Insert the front section of the gap measuring tool of the present utility model into the middle hole of the reference block, gently press the gauge rod on the upper end of the dial indicator, and the gauge rod pushes the measuring probe so that the measuring probe can touch the platform plane, as shown in Figure 2 display, and then adjust the dial to adjust the reading of the dial indicator to 0.

After the adjustment is completed, put the gap measurement tool of the present invention into the installation position of the rotational speed sensor for measurement, as shown in FIG. 3 . Gently press down the gauge rod on the upper end of the dial gauge so that the measuring probe can touch the surface of the measured rotational speed gear 4 . At this time, the data A can be directly read from the dial indicator, and the addition of A and the thickness dimension data of the reference block is the distance M between the installation end face of the speed sensor and the speed gear. Then through specific calculations, the thickness of the installation adjustment pad can be obtained.

Finally, it should be pointed out that the above embodiments are only used to illustrate the technical solution of the present utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: it can still modify the technical solutions described in the aforementioned embodiments, or perform equivalent replacements for some of the technical features; and These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims (9)

1. A gap measurement tool, characterized in that: comprising a reference rod (1), a measuring probe (2) and a measuring table; The reference rod (1) is provided with a through hole connecting the two ends in the length direction, and the outside of the reference rod (1) is provided with a positioning boss (11); The measuring probe (2) is slidingly fitted with the through hole inside the reference rod (1); The measuring meter is installed at one end of the reference rod (1), and the measuring rod of the measuring meter is connected with one end of the measuring probe (2). 2. The gap measuring tool according to claim 1, characterized in that: the end of the measuring probe (2) away from the measuring table is set as a conical structure, and the conical large end of the conical structure is close to the measuring table , the small conical end of the conical structure is far away from the measuring table. 3. The gap measuring tool according to claim 2, characterized in that: the end surface of the small conical end of the conical structure is set as a spherical surface. 4. The gap measuring tool according to claim 3, characterized in that: the gap measuring tool also includes a nut (3); the through hole provided on the reference rod (1) includes two sections, close to the measuring table One end of the measuring gauge is set as a threaded hole, and the end away from the measuring gauge is set as a light hole; the measuring gauge is installed on the reference rod (1) through the nut (3). 5. The gap measuring tool according to claim 4, characterized in that: the positioning boss (11) comprises two, and the two positioning bosses (11) are in the length direction of the reference rod (1) Parallel setting. 6. The gap measuring tool according to claim 5, characterized in that the measuring probe (2) is detachably connected to the measuring rod of the measuring gauge. 7. gap measuring tool as claimed in claim 6, is characterized in that: described gap measuring tool also comprises copper cover, and described copper cover matches with the light hole of described reference rod (1), and described measuring probe ( 2) Installed in the copper sleeve. 8. The gap measurement tool according to claim 7, characterized in that: the gap measurement tool also includes a positioning knob, and the positioning knob is installed on the side wall of the reference rod (1) for fixing the Measure the position of the probe (2). 9. The gap measuring tool according to claim 8, characterized in that: the contact part between the positioning knob and the measuring probe (2) is made of pure copper or non-metallic material.