A turbine seal adjustment and scraping device

Abstract

The application discloses a kind of adjusting and scraping device of steam seal of steam turbine, including rotary cutting scraper;Rotary cutting scraper output end drive is provided with rotary milling cutter head, the rotary cutting scraper is installed on walking mechanism, the walking mechanism is provided with gyro wheel, when gyro wheel and the groove bottom of the tooth groove of the steam seal to be machined steam seal are rolled and matched, milling cutter head rotating end and the inner edge of the tooth top of steam seal tooth contact;The special tool of steam turbine steam seal adjusting and scraping of the application is reasonably designed, easy to operate, portable use, can realize accurate steam seal adjustment and high-efficiency steam seal scraping, improve the work efficiency of steam turbine overhaul.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of steam turbines, in particular to the adjustment and scraping of steam seals of steam turbines. BACKGROUND

[0002] Steam turbines are key equipment in the power industry, and their performance has a significant impact on energy conversion efficiency and equipment operation safety. Steam seals are important components in steam turbines, playing a crucial role in preventing steam leakage and improving turbine cylinder efficiency. However, due to long-term operation and external factors, steam seals may deform or wear, leading to increased steam leakage and reduced turbine efficiency. Existing methods for adjusting and scraping steam seals mainly rely on manual tools or large CNC lathes, which have complex operation processes, low efficiency, and difficulty in achieving precise adjustment. SUMMARY

[0003] The purpose of the present application is to overcome the shortcomings of the prior art, and to provide an adjustment and scraping device for steam seals of steam turbines to accurately scrape the tooth tips of steam seals of steam turbines, improve the efficiency of steam turbines, and reduce energy loss.

[0004] Technical solution: To achieve the above purpose, the adjustment and scraping device for steam seals of steam turbines of the present application comprises a rotary scraping device; a rotary milling cutter head is driven at the output end of the rotary scraping device; the rotary scraping device is installed on a walking mechanism; the walking mechanism is provided with rollers; when the rollers roll with the groove bottom of the steam seal tooth groove of the processed steam seal, the rotary end of the milling cutter head contacts the inner edge of the tooth top of the steam seal tooth.

[0005] Further, the walking mechanism comprises an outer sleeve, the outer sleeve is provided with internal threads, and the internal threads of the outer sleeve are in rotational cooperation with the internal threads provided on the inner sleeve of the rotary scraping device.

[0006] Further, a locking member is provided on the outer sleeve, and in the locked state, the outer sleeve and the inner sleeve cannot rotate relative to each other.

[0007] Further, the rollers have two groups, and the two groups of rollers roll with the groove bottom of the adjacent steam seal tooth groove, respectively.

[0008] Further, each group of rollers comprises a first roller and a second roller, the first roller and the second roller roll with the groove bottom of the same steam seal tooth groove, and the milling cutter head is located between the first roller and the second roller.

[0009] Further, the roller surfaces of the first roller and the second roller are made of conductive material, and the walking mechanism is provided with a recognition circuit.

[0010] First state: When the first roller and the second roller simultaneously roll in contact with the bottom of the steam seal tooth groove, the first roller and the second roller are electrically connected through the metal steam seal.

[0011] Second state: When either the first roller or the second roller disengages from the bottom of the steam seal tooth groove, the first roller and the second roller are electrically disconnected.

[0012] The identification circuit can identify the first state and the second state.

[0013] Furthermore, when the identification circuit detects the second state, the rotating scraper stops abruptly.

[0014] Beneficial effects: The steam turbine seal adjustment and scraping device of the present invention is a special tool that enables precise adjustment and efficient scraping of the steam seal, thereby improving the work efficiency of steam turbine maintenance. The steam turbine seal adjustment and scraping special tool of the present invention is reasonably designed, easy to operate, portable, and applicable to different types of steam turbine seal and steam baffle adjustment and scraping operations, thereby improving the efficiency of steam turbine maintenance and shortening the maintenance period of the steam turbine body to ensure the installation of steam turbine seals. Attached Figure Description

[0015] Appendix Figure 1 Schematic diagram of the adjustment and scraping device for steam turbine seals;

[0016] Appendix Figure 2 Top view of the steam turbine seal adjustment and scraping device;

[0017] Appendix Figure 3 Schematic diagram of the adjustment and operation of the scraping device;

[0018] Appendix Figure 4 Side view of the steam seal;

[0019] Appendix Figure 5 Identify circuit diagrams. Detailed Implementation

[0020] The invention will now be further described with reference to the accompanying drawings.

[0021] As attached Figures 1-3 As shown, an adjustment and scraping device for a steam turbine seal includes a rotary scraper 5; the output end of the rotary scraper is driven to be equipped with a rotary milling cutter head 6, the rotary scraper 5 is mounted on a traveling mechanism, the traveling mechanism is equipped with rollers, when the rollers roll into contact with the bottom of the groove 13 of the steam seal 10 being processed, the rotating end of the milling cutter head 6 contacts the inner edge of the tooth tip of the steam seal tooth;

[0022] The walking mechanism includes an outer sleeve 2, which is provided with an internal thread. The internal thread of the outer sleeve 2 is rotatably engaged with the internal thread provided on the inner sleeve 1 of the rotary scraper. After the outer sleeve 2 rotates one revolution relative to the inner sleeve 1, the extension and retraction of the device is 1 mm.

[0023] The outer sleeve 2 is provided with a locking element 3. When the locking element 3 is locked, the outer sleeve 2 and the inner sleeve 1 cannot rotate relative to each other.

[0024] As attached Figures 1-2 As shown, there are two sets of rollers, and the two sets of rollers respectively roll into contact with the bottom of the adjacent steam seal tooth groove 13; each set of rollers includes a first roller 4 and a second roller 8, the first roller 4 and the second roller 8 roll into contact with the bottom of the same steam seal tooth groove 13, and the milling cutter head 6 is located between the first roller 4 and the second roller 8; a sliding groove 7 is provided between the first roller 4 and the roller corresponding to the other set of rollers, and a sliding groove 7 is also provided between the second roller 8 and the roller corresponding to the other set of rollers.

[0025] The roller surfaces of the first roller 4 and the second roller 8 are both made of conductive material, and the walking mechanism is provided with an identification circuit;

[0026] First state: When the first roller 4 and the second roller 8 are simultaneously rolling and engaging with the bottom of the steam seal tooth groove 13 of the steam seal 10, the first roller 4 and the second roller 8 are electrically connected through the metal steam seal 10.

[0027] Second state: When either the first roller 4 or the second roller 8 disengages from the bottom of the steam seal tooth groove 13 of the steam seal 10, the first roller 4 and the second roller 8 are electrically disconnected.

[0028] The identification circuit can identify the first state and the second state; when the identification circuit identifies the second state, the rotating scraper 5 stops abruptly.

[0029] Example

[0030] As attached Figures 1-3 As shown, when using the turbine steam seal adjustment and scraping device, the traveling mechanism of the device is placed on the steam seal 10. The rollers of the traveling mechanism roll in cooperation with the bottom of the steam seal tooth groove 13. The two sets of rollers roll on the bottom of the steam seal tooth groove 13 on both sides of a steam seal tooth, and the steam seal tooth is located in the sliding groove 7 opened between the two sets of rollers.

[0031] As attached Figures 1-4As shown, the internal thread on the outer sleeve 2 of the traveling mechanism is matched with the external thread of the inner sleeve 1 to adjust the size to be scraped; after the outer sleeve 2 rotates one revolution relative to the inner sleeve 1, the extension and retraction of the device is 1mm, that is, the end of the milling cutter head 6 moves downward 1mm relative to the inner edge of the top tooth of the steam seal tooth after the outer sleeve 2 rotates one revolution relative to the inner sleeve 1.

[0032] After the outer sleeve 2 is rotated to the desired position, it is then locked onto the inner sleeve 1 by the locking member 3, so that the outer sleeve 2 and the inner sleeve 1 cannot rotate relative to each other. Similarly, the end of the milling cutter head 6 cannot be displaced relative to the inner edge of the tooth tip of the steam seal tooth, thereby achieving the goal of fixing the precise dimensions to be scraped. The steam seal 10 has high steam seal teeth 11 and low steam seal teeth 12. There will be a certain height difference between the high steam seal teeth 11 and the low steam seal teeth 12. Similarly, the outer sleeve 2 and the inner sleeve 1 can be used to adjust and scrape the steam seal teeth of different sizes.

[0033] As attached Figures 3-4 As shown, after the size to be scraped is determined by the cooperation of the outer sleeve 2 and the inner sleeve 1 on the traveling mechanism, the milling cutter head 6 contacts the inner edge of the tooth tip of the steam seal tooth, and the rotating scraper 5 is started. The rotating scraper 5 drives the milling cutter head 6 to rotate and scrape the inner edge of the tooth tip of the steam seal tooth; at the same time, it drives the roller of the traveling mechanism to roll in the steam seal tooth groove 13, so that the traveling mechanism travels along the path of the steam seal tooth groove 13, and the traveling mechanism rolls from one end of the steam seal 10 to the other end of the steam seal 10 on the arc-shaped steam seal 10, and performs complete scraping of the entire steam seal tooth.

[0034] Because of the cooperation between the traveling mechanism and the rotary scraper 5, the milling cutter head 6 and the roller rolling on the bottom of the steam seal tooth groove 13 are relatively stationary. The moving path of the roller is consistent with the arc line formed by the bottom of the steam seal tooth groove 13. Since the milling cutter head 6 and the roller are relatively stationary, the distance between the scraping path of the milling cutter head 6 and the arc line formed by the bottom of the steam seal tooth groove 13 is equal, and the shape of the arc line formed by the scraping path of the milling cutter head 6 is the same as that of the arc line formed by the bottom of the steam seal tooth groove 13. This makes the arc line formed by the tooth tip of the steam seal tooth scraped by the milling cutter head 6 equal in distance and the same in shape as the arc line formed by the bottom of the steam seal tooth groove 13. Thus, precise and efficient scraping of the steam seal tooth is achieved.

[0035] As attached Figure 5As shown, when the walking mechanism walks along the steam seal groove 13 of the steam seal 10, if any of the first roller 4 and the second roller 8 is separated from the groove bottom of the steam seal tooth groove 13 of the steam seal 10, the milling cutter head is deflected, and the tooth top of the steam seal tooth is scraped by the milling cutter head 6 to form a concave gap, and the precision of the milling cutter head 6 is not accurate, and the concave gap of the steam seal tooth causes the damage of the steam seal 10 and cannot be used; therefore, the identification circuit is arranged on the walking mechanism, and the identification circuit includes a loop composed of a power supply, a switch, a current identifier 20 and a resistor, and the circuit is as shown in the attached Figure 5 As shown, the first roller 4, the second roller 8 and the processed steam seal 10 jointly constitute the contact switch of the above-mentioned loop.

[0036] In the normal scraping process of the rotary scraper 5, the first roller 4 and the second roller 8 are conductively connected through the steam seal 10 of metal material, the current identifier 20 of the identification circuit identifies the current, and the rotary scraper 5 normally operates.

[0037] When any of the first roller 4 and the second roller 8 is separated from the groove bottom of the steam seal tooth groove 13 of the steam seal 10, the first roller 4 and the second roller 8 are electrically disconnected, and the current identifier 20 of the identification circuit suddenly changes from identifying the current to not identifying the current, at which time the system automatically controls the rotary scraper 5 to stop urgently, so as to avoid the further damage of the milling cutter head 6 which has been deflected to the steam seal tooth.

[0038] The first roller 4 and the second roller 8 only have the roller surface of the roller as a conductive material, and the side surface of the roller is an insulating material, so as to ensure that the first roller 4 and the second roller 8 are conductively connected through the steam seal 10 of metal material only through the roller and the groove bottom of the steam seal tooth groove 13; and the first roller 4 and the second roller 8 are not conductively connected through the steam seal 10 of metal material by being close to the side surface of the steam seal tooth when the roller surface is separated from the groove bottom of the steam seal tooth groove 13, and the steam seal 10 is damaged.

[0039] The above is the preferred embodiment of the present application, and it should be pointed out that the ordinary skilled in the art can make several improvements and refinements without departing from the principles of the present application, and these improvements and refinements should also be considered as the protection scope of the present application.

Claims

1. An adjustment and scraping device for a steam turbine seal, characterized in that: Includes a rotary scraper (5); the output end of the rotary scraper is driven by a rotary milling head (6), the rotary scraper (5) is mounted on a traveling mechanism, the traveling mechanism is provided with rollers, when the rollers roll into contact with the bottom of the groove (13) of the steam seal (10) being processed, the rotating end of the rotary milling head (6) contacts the inner edge of the tooth tip of the steam seal tooth; There are two sets of rollers, and the two sets of rollers respectively roll into contact with the bottom of the adjacent steam seal tooth groove (13); Each set of rollers includes a first roller (4) and a second roller (8), the first roller (4) and the second roller (8) rollingly engaging with the bottom of the same steam seal tooth groove (13), and the rotary milling cutter head (6) being located between the first roller (4) and the second roller (8); The roller surfaces of the first roller (4) and the second roller (8) are both made of conductive material, and the walking mechanism is provided with an identification circuit; First state: When the first roller (4) and the second roller (8) simultaneously roll into contact with the bottom of the groove of the steam seal tooth (13) of the steam seal (10), the first roller (4) and the second roller (8) are electrically connected through the metal steam seal (10). Second state: When either the first roller (4) or the second roller (8) disengages from the bottom of the groove of the steam seal tooth (13) of the steam seal (10), the first roller (4) and the second roller (8) are electrically disconnected. The identification circuit can identify the first state and the second state.

2. The adjusting and scraping device for a steam turbine seal according to claim 1, characterized in that: The walking mechanism includes an outer sleeve (2), which is provided with an internal thread. The internal thread of the outer sleeve (2) is rotatably engaged with the external thread provided on the inner sleeve (1) of the rotary scraper.

3. The adjusting and scraping device for a steam turbine seal according to claim 2, characterized in that: The outer sleeve (2) is provided with a locking member (3). When the locking member (3) is locked, the outer sleeve (2) and the inner sleeve (1) cannot rotate relative to each other.

4. The adjusting and scraping device for a steam turbine seal according to claim 1, characterized in that: When the identification circuit detects the second state, the rotating scraper (5) stops abruptly.

Images