Tool for repairing, scraping, adjusting and detecting sealing gap of mouth ring

Abstract

A tool for scraping, adjusting and detecting a mouth ring sealing gap comprises a supporting plate (1), a rotating shaft (2) and a tool rest (3), the supporting plate (1) is installed on the top face of a lower bearing cylinder of a compressor, the rotating shaft (2) is movably installed on the supporting plate (1) through a pair of rotating shaft supports (4), one end of the tool rest (3) is an arc-shaped detection face (5), and a scraper (6) is arranged at the other end of the tool rest (3); the accuracy of measuring the clearance of the compressor port ring is effectively improved, and the function of scraping and adjusting the clearance of the port ring is achieved.

Description

Technical Field

[0001] The utility model relates to the field of centrifugal compressor maintenance equipment, and particularly relates to a tooling for scraping, adjusting and detecting the seal clearance of the orifice ring. Background Art

[0002] At present, as a mechanical equipment for gas compression and transportation, centrifugal compressors are widely used in many fields such as petroleum, chemical industry, and metallurgy. As the core equipment of the device, its efficient, long-term, stable and safe operation determines the long-term stable operation of the device. Therefore, the installation and maintenance quality standards and requirements for the unit will be higher, aiming to lay a foundation for the long-term efficient and stable operation of the compressor. During the maintenance process, a key process is to accurately measure and adjust the gas seal clearance of each stage of the compressor. Only after passing the acceptance can the cover be closed for the next maintenance process. Whether the clearance is 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 bolted together, and the internal stator components are a whole horizontally split and bolted together. To measure the gas seal clearance between the rotor and the internal stator at each stage, the internal stator needs to be withdrawn together with the rotor from the inside of the outer shell before operation. Currently, the commonly used method for measuring the gas seal clearance at the maintenance site is to directly place the rotor on the lower bearing cylinder, arrange adhesive tapes in the circumferential direction of the gas seal teeth at each stage, fasten the upper bearing cylinder and then remove it. The gas seal clearance at each stage is obtained by measuring the thickness of the pressed marks on the adhesive tapes. Although this method is easy to operate, since the rotor is not placed in the working position and there will inevitably be eccentricity with the center of the bearing cylinder, the measured data is bound to be distorted, which will mislead the correct adjustment and scraping of the gas seal clearance. In the actual operation process, problems such as uneven clearance adjustment and clearance exceeding the standard often occur, resulting in a situation where the rotor is scratched during the reinstallation or even rubbing occurs during startup, making it impossible to operate normally and forcing rework, affecting the maintenance quality, construction period and even excessive consumption of spare parts. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a tooling for scraping, adjusting and detecting the seal clearance of the orifice ring in view of the above deficiencies.

[0004] The utility model includes a support plate, a rotating shaft and a tool rest.

[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 rest is an arc-shaped detection surface, and a scraper is provided at the other end of the tool rest. The tool rest is installed on the rotating shaft. By rotating the rotating shaft, the scraper is driven to scrape the orifice comb teeth inside the compressor.

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

[0007] The rotating shaft support is annular, and a set of support shafts are arranged on the rotating shaft support. One end of each support shaft is located inside the rotating shaft support and is provided with a pulley. The rotating shaft rotates in the pulleys at the ends of the set of support shafts.

[0008] The number of the set of support shafts is three, which consists of a top support shaft and a pair of bottom support shafts. The top support shaft is vertically installed on the rotating shaft support, and the pair of bottom support shafts are symmetrically distributed with the rotating shaft as the center and installed on the rotating shaft support. The included angle between the pair of bottom support shafts is α, and α is 80 - 100°.

[0009] A pair of long oval holes are respectively opened at both ends of the support plate. Adjustable support plates are respectively arranged on both sides of the rotating shaft support. Open nail holes are provided on the adjustable support plates. The locking bolts pass through the corresponding long oval holes and are inserted into the nail holes of the adjustable support plates, and nuts are screwed onto the locking bolts to lock and fix from below the adjustable support plates.

[0010] A set of positioning keys are arranged in sequence on the rotating shaft. A shaft - passing hole is opened in the middle of the tool rest. A keyway matching the positioning keys is opened in the shaft - passing hole. A scraper mounting seat is arranged at the other end of the tool rest. A scraper mounting groove is opened on one side of the scraper mounting seat, and a set of threaded adjustment holes are opened on the other side of the scraper mounting seat. The scraper is inserted into the scraper mounting groove, a set of adjustment screws are screwed into the corresponding threaded adjustment holes, one end of the adjustment screw abuts against the back of the scraper blade, and a set of pressing screws are arranged above the scraper mounting seat to press the scraper tightly in the scraper mounting groove from above.

[0011] A handwheel is arranged at one end of the rotating shaft.

[0012] A set of dial gauge holders are arranged on the rotating shaft. A dial indicator for measuring the concentricity between the rotating shaft and the lower bearing cylinder of the compressor is arranged on the dial gauge holder, and the measuring head of the dial indicator abuts against the datum face of the stop of the lower bearing cylinder of the compressor.

[0013] The advantages of the present utility model are as follows:

[0014] 1. It effectively improves the accuracy of measuring the orifice ring clearance of the compressor and simultaneously has the function of scraping and adjusting the orifice ring clearance.

[0015] 2. It makes the tooling operation simple, greatly reduces the labor intensity, saves the equipment maintenance man - hours, and greatly improves the inspection and maintenance work efficiency. Description of the Drawings

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

[0017] Figure 2 It is the present utility model Figure 1 A partially enlarged structural schematic diagram of area A.

[0018] Figure 3 It is a partially enlarged structural schematic diagram of area B of the present utility model.

[0019] Figure 4 This is a schematic structural view of the support shaft of the present utility model.

[0020] Figure 5 This is a schematic structural view of the tool rest of the present utility model mounted on the rotating shaft.

[0021] Figure 6 This is a schematic structural view of the tool rest of the present utility model. Detailed implementation manners

[0022] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions 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. Obviously, the described embodiments are some but not all of the embodiments of the present invention. Usually, the components of the embodiments of the present invention described and illustrated 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 drawings is not intended to limit the scope of the claimed present invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of protection of the present invention.

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

[0025] In the description of the embodiments of the present invention, it should be noted that if terms such as "upper", "lower", "inner", "outer", etc. are used to indicate the orientation or positional relationship, it is based on the orientation or positional relationship shown in the drawings or the orientation or positional relationship in which the product of the invention is usually placed during use. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention. In addition, in the description of the present invention, if terms such as "first", "second", etc. are used only for distinguishing descriptions and cannot be construed as indicating or implying relative importance.

[0026] In the description of the embodiments of the present invention, it should also be noted that unless otherwise clearly specified and defined, the terms "arrangement" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0027] As shown in the attached drawings, the utility model includes a support plate 1, a rotating shaft 2, and a tool rest 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 rest 3 is an arc-shaped detection surface 5, and a scraping knife 6 is arranged at the other end of the tool rest 3. The tool rest 3 is installed on the rotating shaft 2. By rotating the rotating shaft 2, the scraping knife 6 is driven to scrape the orifice comb teeth 100 inside the compressor.

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

[0030] The rotating shaft bracket 4 is annular. A group of support shafts 7 are arranged on the rotating shaft bracket 4. One end of the support shaft 7 is located inside the rotating shaft bracket 4, and a pulley 14 is arranged. The rotating shaft 2 rotates in the pulleys 14 at the ends of a group of support shafts 7.

[0031] The number of a group of support shafts 7 is three, which consists 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. A pair of bottom support shafts are mirror-symmetrically distributed and installed on the rotating shaft bracket 4 with the rotating shaft 2 as the center. The included 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. Adjustable support plates 8 are respectively arranged on both sides of the rotating shaft bracket 4. Open nail holes are arranged on the adjustable support plates 8. The locking bolts pass through the corresponding long waist holes and are inserted into the nail holes of the adjustable support plates 8. Nuts are screwed on the locking bolts and are locked and fixed from below the adjustable support plates 8.

[0033] A group of positioning keys 9 are sequentially arranged on the rotating shaft 2. A shaft-passing hole is opened in the middle of the tool rest 3. A key groove matching the positioning keys 9 is opened in the shaft-passing hole. A scraping knife mounting seat 10 is arranged at the other end of the tool rest 3. A scraping knife mounting groove is opened on one side of the scraping knife mounting seat 10. A group of threaded adjustment holes are opened on the other side of the scraping knife mounting seat 10. The scraping knife 6 is inserted into the scraping knife mounting groove. A group of adjustment screws 11 are screwed into the corresponding threaded adjustment holes. One end of the adjustment screw 11 abuts against the back of the scraping knife 6. A group of pressing screws 12 are arranged above the scraping knife mounting seat 10. The pressing screws 12 press the scraping knife 6 in the scraping knife mounting groove from above.

[0034] One end of the rotating shaft 2 is provided with a handwheel.

[0035] A set of dial gauge brackets is arranged on the rotating shaft 2, and a dial indicator 13 for measuring the concentricity between the rotating shaft 2 and the lower bearing cylinder of the compressor is arranged on the dial gauge bracket. The measuring head of the dial indicator 13 abuts against the datum face of the stop of the lower bearing cylinder of the compressor.

[0036] Embodiment 1: As shown in the appendix Figure 6 As shown, the scraping knife 6 on the tool rest 3 has a scraping adjustment function, and the arc-shaped detection surface 5 on the tool rest 3 has an orifice ring clearance detection function. The position of the scraping knife 6 is adjusted by screwing the adjusting screw 11. After adjustment, it is fixed by tightening the pressing screw 12. The whole tool rest 3 is sleeved on the rotating shaft 2. The radius of curvature of the arc-shaped detection surface 5 is made based on the size of the orifice ring of the measured compressor impeller. The position of the scraping knife 6 is adjusted according to the given clearance standard to meet the scraping amount requirement and finally obtain the required clearance value.

[0037] The rotating shaft 2 rotates at the center of the pulley 14 of a set of support shafts 7. The measuring head of the dial indicator 13 abuts against the datum face of the stop of the lower bearing cylinder of the compressor. According to the value measured by the dial indicator, the support shaft 7 is adjusted up and down to make the rotating shaft 2 and the lower bearing cylinder of the compressor concentric. The tool rest 3 is installed on the rotating shaft 2 by key connection. The staff holds the handwheel and rotates the rotating shaft 2. The arc-shaped detection surface 5 serves as the datum for measuring the orifice ring. When it is rotated to the required detection point, the clearance between the arc-shaped detection surface 5 and the orifice ring comb teeth 100 can be detected by a feeler gauge. According to the clearance requirement, the position of the scraping knife 6 is adjusted for scraping. During the process of rotating the rotating shaft 2, the orifice ring comb teeth 100 are scraped synchronously, and finally the required clearance value is ensured, and the measurement and scraping of each level of orifice ring can be implemented.

[0038] External threads are arranged 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 the designated position, it is locked and fixed by a locking nut.

Claims

1. A tool for scraping, adjusting, and detecting the sealing gap of the orifice ring, characterized in that, It includes a support plate (1), a rotating shaft (2) and a tool rest (3). 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 rest (3) is an arc-shaped detection surface (5), and a scraping knife (6) is arranged at the other end of the tool rest (3). The tool rest (3) is installed on the rotating shaft (2). By rotating the rotating shaft (2), the scraping knife (6) is driven to scrape the orifice comb teeth (100) inside the compressor.

2. The tooling for scraping, adjusting, and detecting the sealing gap of the orifice ring according to claim 1, characterized in that, The support plate (1) is a rectangular frame and is detachably installed on the top surface of the lower bearing cylinder of the compressor through bolts.

3. The tool for scraping, adjusting, and detecting the sealing gap of the orifice ring according to claim 2, characterized in that, The rotating shaft bracket (4) is annular. A set of support shafts (7) is arranged on the rotating shaft bracket (4). One end of the support shaft (7) is located inside the rotating shaft bracket (4) and is provided with a pulley (14). The rotating shaft (2) rotates in the pulleys (14) at the ends of a set of support shafts (7).

4. A tool for scraping, adjusting, and detecting the sealing gap of the orifice ring according to claim 3, characterized in that The number of a set of support shafts (7) is three, which consists 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). A pair of bottom support shafts are mirror-symmetrically distributed on the rotating shaft bracket (4) with the rotating shaft (2) as the center. The included angle between the pair of bottom support shafts is α, and α is 80 - 100°.

5. The tooling for scraping, adjusting, and detecting the sealing gap of the orifice ring according to claim 4, characterized in that A pair of long waist holes are respectively opened at both ends of the support plate (1). Adjustable support plates (8) are respectively arranged on both sides of the rotating shaft bracket (4). Open nail holes are provided on the adjustable support plates (8). The locking bolts pass through the corresponding long waist holes and are inserted into the nail holes of the adjustable support plates (8). Nuts are screwed onto the locking bolts and are locked and fixed from below the adjustable support plates (8).

6. The tooling for scraping, adjusting and detecting the sealing gap of the orifice ring according to claim 1, characterized in that, A set of positioning keys (9) are arranged in sequence on the rotating shaft (2). A shaft-passing hole is opened in the middle of the tool rest (3), and a key groove matching the positioning key (9) is opened in the shaft-passing hole. A scraping knife mounting seat (10) is arranged at the other end of the tool rest (3). A scraping knife mounting groove is opened on one side of the scraping knife mounting seat (10), and a set of threaded adjustment holes are opened on the other side of the scraping knife mounting seat (10). The scraping knife (6) is inserted into the scraping knife mounting groove. A set of adjustment screws (11) are screwed into the corresponding threaded adjustment holes. One end of the adjustment screw (11) abuts against the back of the scraping knife (6). A set of pressing screws (12) are arranged above the scraping knife mounting seat (10). The pressing screws (12) press the scraping knife (6) into the scraping knife mounting groove from above.

7. A tool for scraping, adjusting, and detecting the sealing gap of the orifice ring according to claim 1, characterized in that, A hand wheel is arranged at one end of the rotating shaft (2).

8. A tool for scraping, adjusting, and detecting the sealing gap of the orifice ring according to claim 1, characterized in that, A set of dial gauge brackets are arranged on the rotating shaft (2). A dial indicator (13) for measuring the concentricity between the rotating shaft (2) and the lower bearing cylinder of the compressor is arranged on the dial gauge bracket. The measuring head of the dial indicator (13) abuts against the datum surface of the stop of the lower bearing cylinder of the compressor.

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