A tool for scraping, adjusting and detecting the sealing gap of the mouth ring

Abstract

A tool for scraping, adjusting and detecting the sealing gap of a mouth ring, comprising a support plate (1), a rotating shaft (2) and a knife holder (3); the support plate (1) is mounted on the top surface of a compressor lower bearing cylinder; the rotating shaft (2) is movably mounted on the support plate (1) via a pair of rotating shaft brackets (4); one end of the knife holder (3) is an arc-shaped detection surface (5); and the other end of the knife holder (3) is provided with a scraper (6); the tool effectively improves the accuracy of measuring the gap of the compressor mouth ring and also has the function of scraping and adjusting the gap of the mouth ring.

Description

Technical Field

[0001] The invention relates to the field of centrifugal compressor maintenance equipment, in particular to a tool for scraping, adjusting and detecting the sealing gap of a mouth ring. Background Art

[0002] Currently, centrifugal compressors, as mechanical equipment for gas compression and transportation, are widely used in many fields such as petroleum, chemical industry, and metallurgy. As the core equipment of the equipment, their high efficiency, long-term, and stable operation determine the long-term stable operation of the equipment. Therefore, the quality standards and requirements for unit installation and maintenance are higher, aiming to lay the foundation for the long-term efficient and stable operation of the compressor. A key step in the maintenance process is the precise measurement and adjustment of the gaps between the gas seals at all levels of the compressor. Only after passing the inspection and acceptance can the cover be removed and the next maintenance step can be carried out. Whether the gaps are uniform and qualified is particularly important. Due to the structural characteristics of the vertically split centrifugal compressor, the outer shell and the end cover are axially assembled, and the internal stator component is a horizontally split and assembled whole. To measure the air seal clearance at each level between the rotor and the internal stator, the internal stator must be pulled out from the inside of the outer shell together with the rotor before operation can be performed. The air seal clearance measurement method commonly used on maintenance sites at present is to directly place the rotor on the lower support cylinder, arrange tape in the circumferential direction of the air seal teeth at each level, buckle the upper support cylinder tightly and then remove the upper support cylinder, and obtain the air seal clearance at each level by measuring the thickness of the tape indentation. Although this method is simple to operate, since the rotor is not placed in the working position and is inevitably eccentric with the center of the support cylinder, it is bound to cause distortion of the measured data and mislead the correct adjustment and scraping of the air seal clearance. In the actual operation process, there are often problems such as uneven gap adjustment and excessive gap, which result in the situation that the machine is scratched after reinstallation or even rubbed when started and cannot operate normally, forcing it to be returned for repair, affecting the maintenance quality and construction period and even excessive spare parts consumption. Summary of the Invention

[0003] The purpose of the present invention is to address the above-mentioned deficiencies and provide a tool for scraping, adjusting and detecting the sealing gap of the mouth ring.

[0004] The present invention includes a support plate, a rotating shaft and a tool holder.

[0005] The support plate is installed on the top surface of the lower bearing cylinder of the compressor. The rotating shaft is movably installed on the support plate through a pair of rotating shaft brackets. One end of the tool holder is an arc-shaped detection surface, and the other end of the tool holder is provided with a scraper. The tool holder is installed on the rotating shaft. When the rotating shaft is rotated, the scraper is driven to scrape the comb teeth of the mouth ring inside the compressor.

[0006] The support plate is a rectangular frame and is detachably mounted on the top surface of the compressor lower bearing cylinder by bolts.

[0007] The rotating shaft bracket is annular and is provided with a group of supporting shafts. One end of the supporting shaft is located in the rotating shaft bracket and is provided with a pulley. The rotating shaft rotates in the pulleys at the end of the group of supporting shafts.

[0008] The number of support shafts in a group is three, consisting of a top support shaft and a pair of bottom support shafts. The top support shaft is vertically installed on the rotating shaft bracket, and the pair of bottom support shafts are mirror-distributed and installed on the rotating shaft bracket with the rotating shaft as the center. The angle between the pair of bottom support shafts is α, and α is 80-100°.

[0009] A pair of long waist holes are respectively opened at both ends of the support plate, and an adjustable support plate is respectively provided on both sides of the rotating shaft bracket. The adjustable support plate has open nail holes, and the locking bolts pass through the corresponding long waist holes and are inserted into the nail holes of the adjustable support plate. The nuts are screwed on the locking bolts and locked and fixed from the bottom of the adjustable support plate.

[0010] A group of positioning keys are arranged in sequence on the rotating shaft, a shaft hole is opened in the middle of the tool holder, and a key slot matching the positioning key is opened in the shaft hole. A scraper mounting seat is provided at the other end of the tool holder, a scraper mounting groove is opened on one side of the scraper mounting seat, and a group of threaded adjustment holes are opened on the other side of the scraper mounting seat. The scraper is inserted into the scraper mounting groove, and a group of adjusting screws are screwed into the corresponding threaded adjustment holes. One end of the adjusting screw is pressed against the back of the scraper. A group of clamping screws are provided above the scraper mounting seat, and the clamping screws press the scraper into the scraper mounting groove from above.

[0011] A hand wheel is provided at one end of the rotating shaft.

[0012] A set of meter stands are provided on the rotating shaft, and a dial indicator for measuring the concentricity of the rotating shaft and the lower support cylinder of the compressor is provided on the meter stand. The measuring head of the dial indicator is on the stop reference surface of the lower support cylinder of the compressor.

[0013] The present invention has the following advantages:

[0014] 1. It effectively improves the accuracy of the compressor ring clearance measurement and also has the function of scraping and adjusting the ring clearance.

[0015] 2. It makes the tooling operation easier, greatly reduces labor intensity, saves equipment maintenance hours, and greatly improves maintenance efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the present invention installed on the lower supporting cylinder of the compressor.

[0017] Figure 2 This invention Figure 1 Schematic diagram of the local enlarged structure of area A.

[0018] Figure 3 It is a schematic diagram of the locally enlarged structure of area B of the present invention.

[0019] Figure 4 It is a structural schematic diagram of the support shaft of the present invention.

[0020] Figure 5 It is a structural schematic diagram of the tool holder of the present invention installed on the rotating shaft.

[0021] Figure 6 It is a schematic diagram of the tool holder structure of the present invention. DETAILED DESCRIPTION

[0022] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0023] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are intended to fall within the scope of protection of the present invention.

[0024] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0025] In the description of the embodiments of the present invention, it should be noted that if the terms "upper," "lower," "inner," "outer," etc. appear, the orientation or positional relationship indicated is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the invention is usually placed when in use. These terms are only used to facilitate the description of the present invention and simplify the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, they should not be understood as limitations on the present invention. In addition, if the terms "first," "second," etc. appear in the description of the present invention, they are only used to distinguish the description and should not be understood as indicating or implying relative importance.

[0026] In the description of the embodiments of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "disposed" and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention in specific circumstances.

[0027] As shown in the accompanying drawings, the present invention includes a support plate 1, a rotating shaft 2 and a tool holder 3.

[0028] The support plate 1 is installed on the top surface of the lower bearing cylinder of the compressor. The rotating shaft 2 is movably installed on the support plate 1 through a pair of rotating shaft brackets 4. One end of the tool holder 3 is an arc-shaped detection surface 5. The other end of the tool holder 3 is provided with a scraper 6. The tool holder 3 is installed on the rotating shaft 2. When the rotating shaft 2 is rotated, the scraper 6 is driven to scrape the ring comb teeth 100 in the compressor.

[0029] The support plate 1 is a rectangular frame and is detachably mounted on the top surface of the compressor lower cylinder by bolts.

[0030] The rotating shaft bracket 4 is annular and is provided with a group of supporting shafts 7 . One end of the supporting shaft 7 is located inside the rotating shaft bracket 4 and is provided with a pulley 14 . The rotating shaft 2 rotates in the pulley 14 at the end of the group of supporting shafts 7 .

[0031] There are three support shafts in a group 7, which are composed of a top support shaft and a pair of bottom support shafts. The top support shaft is vertically installed on the rotating shaft bracket 4, and the pair of bottom support shafts are mirror-distributed and installed on the rotating shaft bracket 4 with the rotating shaft 2 as the center. The angle between the pair of bottom support shafts is α, and α is 80-100°.

[0032] A pair of long waist holes are respectively opened at both ends of the support plate 1, and an adjustable support plate 8 is respectively provided on both sides of the rotating shaft bracket 4. The adjustable support plate 8 has open nail holes, and the locking bolts are inserted into the nail holes of the adjustable support plate 8 through the corresponding long waist holes. The nuts are screwed on the locking bolts and locked and fixed from the bottom of the adjustable support plate 8.

[0033] A group of positioning keys 9 are arranged in sequence on the rotating shaft 2, a shaft hole is opened in the middle of the tool holder 3, and a key slot matching the positioning key 9 is opened in the shaft hole. A scraper mounting seat 10 is provided at the other end of the tool holder 3, and a scraper mounting groove is opened on one side of the scraper mounting seat 10, and a group of threaded adjustment holes are opened on the other side of the scraper mounting seat 10. The scraper 6 is inserted into the scraper mounting groove, and a group of adjusting screws 11 are screwed into the corresponding threaded adjustment holes. One end of the adjusting screw 11 is against the back of the scraper 6. A group of clamping screws 12 are provided above the scraper mounting seat 10, and the clamping screws 12 press the scraper 6 into the scraper mounting groove from above.

[0034] A hand wheel is provided at one end of the rotating shaft 2.

[0035] A set of gauge stands are provided on the rotating shaft 2, on which a dial gauge 13 for measuring the concentricity between the rotating shaft 2 and the compressor lower support cylinder is provided. The measuring head of the dial gauge 13 is on the stop reference surface of the compressor lower support cylinder.

[0036] Example 1: As shown in the attached Figure 6 As shown, the scraper 6 on the tool holder 3 has a scraping adjustment function, and the arc-shaped detection surface 5 on the tool holder 3 has a ring gap detection function. The position of the scraper 6 is adjusted by turning the adjustment screw 11. After the adjustment is completed, it is tightened and fixed by the clamping screw 12. The tool holder 3 is integrally mounted on the rotating shaft 2. The curvature radius of the arc-shaped detection surface 5 is made based on the ring size of the compressor impeller to be measured. The position of the scraper 6 is adjusted according to the given gap standard to meet the scraping amount requirement and finally obtain the required gap value.

[0037] The rotating shaft 2 rotates at the center of a pulley 14 on a set of support shafts 7. The measuring head of the dial indicator 13 is placed on the reference surface of the stopper of the compressor lower cylinder. Based on the value measured by the dial indicator, the support shaft 7 is adjusted up and down to maintain concentricity between the rotating shaft 2 and the compressor lower cylinder. The tool holder 3 is installed on the rotating shaft 2 via a key connection. The staff grasps the handwheel to rotate the rotating shaft 2. The arc-shaped detection surface 5 serves as the reference for measuring the ring. When the rotation reaches the desired point, the gap between the arc-shaped detection surface 5 and the ring comb teeth 100 can be detected with a feeler gauge. According to the gap requirements, the position of the scraper 6 is adjusted to perform scraping. During the rotation of the rotating shaft 2, the ring comb teeth 100 are scraped synchronously, ultimately ensuring the required gap value, and various levels of ring measurement and scraping can be implemented.

[0038] An external thread is provided on the outer wall of the support shaft 7 , and the support shaft 7 is threadedly installed in the threaded hole of the rotating shaft bracket 4 . When the support shaft 7 is screwed into a specified position, it is locked and fixed by a locking nut.

Claims

1. A tool for scraping, adjusting and testing the sealing gap of the mouth ring, characterized in that: It comprises a support plate (1), a rotating shaft (2) and a tool holder (3), The support plate (1) is mounted on the top surface of the lower bearing cylinder of the compressor, the rotating shaft (2) is movably mounted on the support plate (1) through a pair of rotating shaft brackets (4), one end of the knife holder (3) is an arc-shaped detection surface (5), and the other end of the knife holder (3) is provided with a scraper (6), and the knife holder (3) is mounted on the rotating shaft (2). The rotating shaft (2) is rotated to drive the scraper (6) to scrape the ring comb teeth (100) in the compressor; The support plate (1) is a rectangular frame and is detachably mounted on the top surface of the compressor lower bearing cylinder by means of bolts; The rotating shaft bracket (4) is annular, and a group of supporting shafts (7) are provided on the rotating shaft bracket (4). One end of the supporting shaft (7) is located in the rotating shaft bracket (4) and is provided with a pulley (14). The rotating shaft (2) rotates in the pulley (14) at the end of the group of supporting shafts (7); A set of meter stands is provided on the rotating shaft (2), and a dial indicator (13) is provided on the meter stand for measuring the concentricity between the rotating shaft (2) and the lower support cylinder of the compressor, and the measuring head of the dial indicator (13) is on the stop reference surface of the lower support cylinder of the compressor; After adjustment, the tool holder (3) is fixed by means of a clamping screw (12), and the tool holder (3) is integrally mounted on the rotating shaft (2). The curvature radius of the arc-shaped detection surface (5) is made based on the size of the impeller ring of the compressor to be measured. The position of the scraper (6) is adjusted according to a given clearance standard to meet the scraping amount requirement and finally obtain the required clearance value. The rotating shaft (2) rotates at the center of a pulley (14) of a group of supporting shafts (7). The measuring head of the dial indicator (13) is on the stop reference surface of the compressor lower support cylinder. According to the value measured by the dial indicator, the supporting shaft (7) is adjusted up and down to keep the rotating shaft (2) and the compressor lower support cylinder concentric. The tool holder (3) is installed on the rotating shaft (2) through a key connection. The rotating shaft (2) is rotated. The arc detection surface (5) is used as a reference for measuring the mouth ring. When the rotating shaft (2) is rotated to the point to be detected, the gap between the arc detection surface (5) and the mouth ring comb teeth (100) can be detected by a feeler gauge. According to the gap requirement, the scraper (6) position is adjusted to scrape. In the process of rotating the rotating shaft (2), the mouth ring comb teeth (100) are scraped synchronously. Finally, the required gap value is guaranteed, and the mouth ring measurement and scraping at all levels can be implemented.

2. The tool for trimming, adjusting and detecting the sealing gap of the mouth ring according to claim 1, characterized in that: The number of a set of support shafts (7) is three, and the support shafts are composed of a top support shaft and a pair of bottom support shafts. The top support shaft is vertically mounted on the rotating shaft bracket (4), and the pair of bottom support shafts are mirror-distributed and mounted on the rotating shaft bracket (4) with the rotating shaft (2) as the center. The angle between the pair of bottom support shafts is α, and α is 80-100°.

3. The tool for trimming, adjusting and testing the sealing gap of the mouth ring according to claim 2, characterized in that: A pair of long waist holes are respectively opened at both ends of the support plate (1), and adjustable support plates (8) are respectively provided on both sides of the rotating shaft bracket (4). The adjustable support plate (8) has open nail holes, and locking bolts are inserted into the nail holes of the adjustable support plate (8) through the corresponding long waist holes. Nuts are screwed on the locking bolts and locked and fixed from the bottom of the adjustable support plate (8).

4. The tool for scraping, adjusting and testing the sealing gap of the mouth ring according to claim 1, characterized in that: A group of positioning keys (9) are arranged in sequence on the rotating shaft (2), a through-shaft hole is opened in the middle of the tool holder (3), a key slot matching the positioning key (9) is opened in the through-shaft hole, a scraper mounting seat (10) is provided at the other end of the tool holder (3), a scraper mounting groove is opened on one side of the scraper mounting seat (10), and a group of threaded adjustment holes are opened on the other side of the scraper mounting seat (10), the scraper (6) is inserted into the scraper mounting groove, and a group of adjusting screws (11) are screwed into the corresponding threaded adjustment holes, one end of the adjusting screw (11) is pressed against the back of the scraper (6), and a group of clamping screws (12) are provided above the scraper mounting seat (10), and the clamping screws (12) press the scraper (6) into the scraper mounting groove from above.

5. The tool for trimming, adjusting and testing the sealing gap of the mouth ring according to claim 1, characterized in that: One end of the rotating shaft (2) is provided with a hand wheel.

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