Ultrasonic machining device for main shaft of water-turbine generator set

Abstract

The ultrasonic machining device comprises a base assembly arranged on the periphery of the main shaft of the water-turbine generator set, a guide assembly is installed on the base assembly in a positioning mode, and an ultrasonic machining executing mechanism is installed on the guide assembly in a sliding mode. A driving mechanism is arranged between the ultrasonic machining executing mechanism and the base assembly. The main shaft is subjected to ultrasonic machining through the ultrasonic machining executing mechanism, and after a certain area is machined, the ultrasonic machining executing mechanism is driven by the driving mechanism to slide on the guide assembly in a surrounding mode, so that machining of the whole circumferential face of the main shaft is completed. Ultrasonic machining of large shaft parts is achieved, the surface roughness and abradability of the main shaft of the water-turbine generator set are reduced, the fatigue resistance and hardness are improved, the service life of the main shaft of the water-turbine generator set is greatly prolonged, the maintenance cost is greatly saved, the replacement frequency is reduced, and the production efficiency is improved. And the long-time continuous normal work of the water-turbine generator set is effectively ensured.

Description

Technical Field

[0001] The invention belongs to the technical field of ultrasonic machining, and in particular relates to an ultrasonic machining device for a main shaft of a hydro-generator set. Background Art

[0002] At present, the main shaft used in the mixed flow turbine generator set needs to undergo mechanical heat treatment after conventional machining (such as turning, milling, etc.). However, due to its high surface roughness, low hardness and fatigue strength, it is easy to wear during the operation of the unit (especially the areas where bearings are installed, such as the shaft collar), resulting in the need for inspection and maintenance during the operation of the unit. When the wear is severe, it may even need to be returned to the factory for repair. Due to the large size and weight of the main shaft, not only is the cost of returning to the factory high and the repair difficulty great, but the long-term shutdown and maintenance of the turbine generator set will also cause a lot of energy and economic losses. Summary of the Invention

[0003] In response to the deficiencies in the prior art, an embodiment of the present invention provides an ultrasonic machining device for the main shaft of a hydro-generator set, which can be used for on-site machining of the main shaft to improve the hardness and fatigue resistance of the main shaft and increase the service life of the main shaft.

[0004] The technical solution provided by an embodiment of the present invention is: an ultrasonic machining device for the main shaft of a hydro-turbine generator set, comprising a base assembly arranged on the periphery of the main shaft of the hydro-turbine generator set, a guide assembly being positioned and installed on the base assembly, an ultrasonic machining actuator being slidably installed on the guide assembly, and a driving mechanism being provided between the ultrasonic machining actuator and the base assembly.

[0005] As an improvement, a slide is slidably mounted on the guide assembly, and a control cabinet is mounted on the slide; the slide and the ultrasonic machining actuator are mirror-imaged.

[0006] As a further improvement, a connecting plate is provided between the slide and the ultrasonic machining actuator.

[0007] As a further improvement, a conductive slip ring is provided below the base assembly, a slide groove is provided on the conductive slip ring, and a brush is slidably mounted on the slide groove.

[0008] As an improvement, a base assembly is provided on the base assembly, and the guide assembly, the driving mechanism and the ultrasonic machining actuator are arranged on the base.

[0009] As a further improvement, the base assembly includes a plurality of base bodies with arc-shaped structures, and the ends of two adjacent base bodies are positioned and connected together; the base assembly includes a plurality of base bodies with arc-shaped structures and connected to the base bodies, and the ends of two adjacent base bodies are positioned and connected together; After all the seat bodies are connected and after all the base bodies are connected, an annular body is formed which surrounds the periphery of the main shaft of the hydro-generator set.

[0010] As a further improvement, the bottom of each seat body and the bottom of each base body are provided with a plurality of abutment bosses; Each of the seat bodies and each of the base bodies is provided with a plurality of weight-reducing grooves, and the seat bodies and the base bodies located in the weight-reducing grooves are provided with reinforcing ribs; The end connection points of two adjacent seat bodies and the end connection points of two adjacent base bodies are staggered with each other.

[0011] As a further improvement, the ends of the two adjacent base bodies and the ends of the two adjacent base bodies are provided with a plug-in positioning combination structure of positioning grooves and positioning protrusions; Each of the base bodies is provided with an arc-shaped extending positioning retaining ring, and the inner wall of the base body is in abutment with the positioning retaining ring; each of the base bodies is provided with a plurality of avoidance grooves on the inner wall, and the base body located in the avoidance groove is provided with a connecting hole for connecting with the base body.

[0012] As a further improvement, the guide assembly includes a plurality of guide rails of an arc-shaped structure, each of the guide rails being fixedly mounted on the base; The driving mechanism includes a plurality of racks of arc-shaped structure, each of which is fixedly mounted on the base; and a slide slidably mounted on the guide rail, wherein the slide is provided with a gear driven by a motor and meshing with the racks; A washer, a rack retaining ring and a guide rail retaining ring are integrally formed on the base, and the washer, the rack retaining ring and the guide rail retaining ring are arranged in a stepped manner from low to high. The diameter of the washer is larger than that of the rack retaining ring, and the diameter of the rack retaining ring is larger than that of the guide rail retaining ring. The pitch circle diameter of the rack is larger than the diameter of the washer; the bottom of the rack abuts against the washer, and the inner wall abuts against the rack retaining ring; the bottom of the guide rail abuts against the rack retaining ring, and the inner wall abuts against the guide rail retaining ring.

[0013] As a further improvement, the ultrasonic machining actuator includes a mounting seat arranged on the slide, a slide arranged along the Z axis and driven by a power mechanism is slidably mounted on the mounting seat, a slider arranged along the Y axis and driven by a drive mechanism is slidably mounted on the slider, and an ultrasonic machining tool is mounted on the slider.

[0014] By adopting the above-mentioned technical solution, the ultrasonic machining device for the main shaft of a hydro-generator set provided by the embodiment of the present invention has the following beneficial effects: Since the ultrasonic processing device for the main shaft of a hydro-generator set includes a base assembly arranged on the periphery of the main shaft of the hydro-generator set, a guide assembly is positioned and installed on the base assembly, an ultrasonic processing actuator is slidably installed on the guide assembly, and a driving mechanism is provided between the ultrasonic processing actuator and the base assembly, based on the above structure, when the ultrasonic processing device for the main shaft of a hydro-generator set is used, the base assembly and the guide assembly are first installed around the periphery of the main shaft of the hydro-generator set, and then high-frequency ultrasonic energy is provided by the ultrasonic processing actuator, and the ultrasonic processing actuator is driven by the driving mechanism to slide around on the guide assembly to complete the processing of the entire circumference of the main shaft of the hydro-generator set.

[0015] In summary, the ultrasonic machining device for the main shaft of the hydro-turbine generator set is used to realize ultrasonic machining of large shaft components, reduce the surface roughness and wear of the main shaft of the hydro-turbine generator set, improve the fatigue strength and hardness, greatly improve the service life of the main shaft of the hydro-turbine generator set, solve the problems of high cost of returning the hydro-turbine generator set to the factory and difficulty in repair, and effectively ensure the long-term and stable operation of the hydro-turbine generator set.

[0016] Since the guide assembly is slidably installed with a slide, and the slide is installed with a control cabinet; the slide and the ultrasonic machining actuator are mirror-set, so the balance of weight on both sides of the main shaft is ensured by the sliding and mirror-set control cabinet, thereby ensuring the horizontality of the ultrasonic machining device for the main shaft of the hydro-turbine generator set after installation, laying the foundation for the processing quality of the ultrasonic machining actuator's circumferential sliding.

[0017] Since a connecting plate is provided between the slide and the ultrasonic machining actuator, the connection between the slide and the ultrasonic machining actuator is achieved through the connecting plate, and then the ultrasonic machining actuator moves synchronously during the surrounding machining, effectively ensuring that the weight on both sides of the spindle always remains balanced.

[0018] Since a conductive slip ring is provided under the base assembly, a slide groove is provided on the conductive slip ring, and a brush is slidably installed on the slide groove, the cooperation of the conductive slip ring and the brush not only ensures the reliability of the electrical connection between the control cabinet and the ultrasonic machining actuator, but also avoids the problem of winding of the ultrasonic machining actuator in surround processing.

[0019] Since a base assembly is provided on the base assembly, the guide assembly, the driving mechanism and the ultrasonic machining actuator are arranged on the base, thereby improving the overall structural strength of the ultrasonic machining device for the main shaft of the hydro-generator set through the base.

[0020] Since the base assembly includes multiple arc-shaped base bodies, the ends of two adjacent base bodies are positioned and connected together; the base assembly includes multiple arc-shaped base bodies connected to the base bodies, and the ends of two adjacent base bodies are positioned and connected together; after all the base bodies are connected and all the base bodies are connected, a ring body is formed that surrounds the periphery of the main shaft of the hydro-generator set, so that the base assembly formed by multiple base bodies and the base assembly formed by multiple base bodies are convenient for assembly around the thick main shaft and are also convenient for transportation; the assembly efficiency is guaranteed by positioning connection.

[0021] Since the bottom of each seat body and the bottom of each base body are provided with multiple abutment bosses, the contact area between the seat body and the base body is reduced by the abutment bosses, thereby ensuring the effectiveness and stability of the abutment installation; since each seat body and each base body are provided with multiple weight-reducing grooves, the seat body and the base body located in the weight-reducing grooves are provided with reinforcing ribs, thereby reducing the overall weight of the ultrasonic processing device for the main shaft of the hydro-turbine generator set without affecting the structural strength; the end connections of the two adjacent seat bodies and the end connections of the two adjacent base bodies are staggered with each other, thereby avoiding problems such as deformation caused by force concentration on the end connections during operation.

[0022] Since the ends of the two adjacent seat bodies and the ends of the two adjacent bases are provided with a plug-in positioning combination structure of positioning grooves and positioning protrusions, the positioning cooperation of the positioning grooves and the positioning protrusions can ensure the rapid installation between the two adjacent seat bodies and the two adjacent bases, and the structure is simple and the positioning performance is good; each seat body is provided with an arc-shaped extending positioning retaining ring, and the inner wall of the base body is matched with the positioning retaining ring, so that the positioning retaining ring positions the base to ensure the positioning installation of the base on the seat body, and the installation accuracy and efficiency are high; each base body is provided with a plurality of avoidance grooves on the inner wall, and the base body located in the avoidance groove is provided with a connecting hole for connecting with the base body, so that the base body can be hidden installed on the base body through the avoidance groove, which provides a guarantee for the interference-free installation of the rack and guide rail on the base.

[0023] Since the guide assembly includes multiple guide rails of an arcuate structure, each guide rail is fixedly mounted on the base, the driving mechanism includes multiple racks of an arcuate structure, each rack is fixedly mounted on the base; it also includes a slide slidably mounted on the guide rails, and the slide is provided with a gear driven by a motor and meshing with the racks, so that the guidance and driving are achieved through the mutual cooperation of the racks, gears and guide rails, the structure is simple, the driving effect is good, and the driving stability is high; a washer, a rack retaining ring and a guide rail retaining ring are integrally formed on the base, and the washer, rack retaining ring and guide rail retaining ring are arranged in a stepped manner from low to high The diameter of the washer is larger than that of the rack retaining ring, and the diameter of the rack retaining ring is larger than that of the guide rail retaining ring; the pitch circle diameter of the rack is larger than the diameter of the washer; the bottom of the rack abuts against the washer, and the inner wall abuts against the rack retaining ring, and the bottom of the guide rail abuts against the rack retaining ring, and the inner wall abuts against the guide rail retaining ring, so that the rack and the guide rail are accurately positioned and installed on the base through the washer, the rack retaining ring and the guide rail retaining ring, and the pitch circle diameter of the rack is larger than the washer diameter structure, so that the base avoids the gear, avoiding interference with the base when the gear and rack are engaged and transmitted.

[0024] Since the ultrasonic machining actuator includes a mounting seat arranged on a slide, a slide arranged along the Z axis and driven by a power mechanism is slidably mounted on the mounting seat, a slider arranged along the Y axis and driven by a drive mechanism is slidably mounted on the slider, and an ultrasonic machining tool is mounted on the slider, the machining position of the ultrasonic machining tool can be adjusted by sliding the slide and the slider to meet the ultrasonic machining requirements under different working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The present invention will be further described below with reference to the accompanying drawings and examples: Figure 1 It is a structural diagram of an embodiment of the present invention; Figure 2 yes Figure 1 Structural diagram from another angle; Figure 3 is an exploded view of an embodiment of the present invention; Figure 4 yes Figure 3 A magnified view of middle A; Figure 5 yes Figure 3 A schematic enlarged view of the structure of the middle matrix; Figure 6 yes Figure 5 Schematic diagram of the structure from another angle.

[0026] In the accompanying drawings, the components represented by each symbol are listed as follows: 1. Base assembly; 101. Base body; 102. Abutment boss; 103. Weight reduction groove; 104. Reinforcement rib; 105. Positioning groove; 106. Positioning protrusion; 107. Positioning retaining ring; 108. Connecting block; 2. Base assembly; 201. Base body; 202. Washer; 203. Rack retaining ring; 204. Guide rail retaining ring; 205. Avoidance groove; 3. Guide assembly; 301. Guide rail; 4. Ultrasonic machining actuator; 401. Mounting seat; 402. Slide plate; 403. Handwheel; 404. Belt transmission mechanism; 405. Slider; 5. Driving mechanism; 501. Rack; 502. Slide seat; 503. Motor; 504. Gear; 6. Slide; 601. Connecting plate; 7. Conductive slip ring; 701. Slide groove; 702. Brush. DETAILED DESCRIPTION

[0027] To facilitate understanding of the present application, the present application will be described more fully below with reference to the accompanying drawings. The accompanying drawings provide embodiments of the present application. However, the present application may be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to make the disclosure of the present application more thorough and comprehensive.

[0028] like Figures 1 to 3 As shown, an ultrasonic machining device for a main shaft of a hydro-generator set includes a base assembly 1 arranged on the periphery of the main shaft of the hydro-generator set (not shown in the figure), the base assembly 1 is an annular structure, and a base assembly 2 with an annular structure is positioned and mounted thereon, a guide assembly 3 with an annular extension is positioned and mounted on the base assembly 2, an ultrasonic machining actuator 4 is slidably mounted on the guide assembly 3, and an annular extending drive mechanism 5 is provided between the ultrasonic machining actuator 4 and the base assembly 2; a slide 6 is also slidably mounted on the guide assembly 3, and a control cabinet (not shown in the figure) electrically connected to the ultrasonic machining actuator 4 is installed on the slide 6; the slide 6 and the ultrasonic machining actuator 4 are arranged in a mirror image, and a connecting plate 601 is provided between the slide 6 and the ultrasonic machining actuator 4.

[0029] Preferably, a conductive slip ring 7 is provided below the base assembly 1 , a sliding groove 701 is provided on the conductive slip ring 7 , and a brush 702 is slidably mounted on the sliding groove 701 .

[0030] The base assembly 1 includes a plurality of arc-shaped base bodies 101, and the ends of two adjacent base bodies 101 are positioned and connected together; the base assembly 2 includes a plurality of arc-shaped base bodies 201 connected to the base bodies 101, and the ends of two adjacent base bodies 201 are positioned and connected together; after all the base bodies 101 are connected and all the base bodies 201 are connected, a ring body is formed that surrounds the periphery of the main shaft of the hydro-generator set.

[0031] In this solution, the bottom of each seat body 101 and the bottom of each base body 201 are provided with a plurality of abutment bosses 102; each seat body 101 and each base body 201 are provided with a plurality of weight-reducing grooves 103, and the seat body 101 and the base body 201 located in the weight-reducing grooves 103 are provided with reinforcing ribs 104; the end connection points of two adjacent seat bodies 101 and the end connection points of two adjacent base bodies 201 are staggered with each other.

[0032] See also Figure 4 The ends of the two adjacent base bodies 101 and the ends of the two adjacent base bodies 201 are provided with a plug-in positioning combination structure of positioning grooves 105 and positioning protrusions 106. In order to ensure the connection reliability between the two adjacent base bodies 101, a connecting block 108 is provided at the end connection of the two adjacent base bodies 101; each base body 101 is provided with an arc-shaped extending positioning retaining ring 107, and the inner wall of the base body 201 is abutted against the positioning retaining ring 107; each base body 201 is provided with a plurality of avoidance grooves 205 on the inner wall, and the base body 201 located in the avoidance groove 205 is provided with a connecting hole (not shown in the figure) for connecting with the base body 101.

[0033] The guide assembly 3 includes multiple guide rails 301 with an arc-shaped structure, each guide rail 301 is fixedly mounted on the base 201, and the drive mechanism 5 includes multiple racks 501 with an arc-shaped structure, each rack 501 is fixedly mounted on the base 201; it also includes a slide 502 slidably mounted on the guide rails 301, and the slide 502 is provided with a gear 504 driven by a motor 503 and meshing with the rack 501.

[0034] Reference Figure 5 and Figure 6 A washer 202, a rack retaining ring 203 and a guide rail retaining ring 204 are integrally formed on the base 201. The washer 202, the rack retaining ring 203 and the guide rail retaining ring 204 are arranged in a stepped manner from low to high. The diameter of the washer 202 is larger than the diameter of the rack retaining ring 203, and the diameter of the rack retaining ring 203 is larger than the diameter of the guide rail retaining ring 204; the pitch circle diameter of the rack 501 is larger than the diameter of the washer 202; the bottom of the rack 501 is against the washer 202, the inner wall of the rack 501 is against the rack retaining ring 203, the bottom of the guide rail 301 is against the rack retaining ring 203, and the inner wall of the guide rail 301 is against the guide rail retaining ring 204.

[0035] The ultrasonic machining actuator 4 includes a mounting base 401 arranged on a slide 502, on which a slide 402 is slidably mounted, which is arranged along the Z axis and driven by a power mechanism (such as a combined power structure of a lead screw and a lead screw nut driven by a belt transmission mechanism 404), and a slider 405 is slidably mounted on the slider 402, which is arranged along the Y axis and driven by a drive mechanism (such as a combined power structure of a lead screw and a lead screw nut driven by a handwheel 403). An ultrasonic machining tool is mounted on the slider 405. The ultrasonic machining tool is a tool in the prior art and is not shown in the figure.

[0036] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. An ultrasonic machining device for the main shaft of a hydro-generator set, characterized in that: The invention comprises a base assembly (1) arranged on the periphery of a main shaft of a hydro-generator (503), a guide assembly (3) being positioned and mounted on the base assembly (1), an ultrasonic machining actuator (4) being slidably mounted on the guide assembly (3), and a driving mechanism (5) being provided between the ultrasonic machining actuator (4) and the base assembly (1).

2. The ultrasonic processing device for the main shaft of a hydro-generator set according to claim 1, characterized in that: A slide (6) is also slidably mounted on the guide assembly (3), and a control cabinet is mounted on the slide (6); the slide (6) and the ultrasonic machining actuator (4) are arranged in a mirror image.

3. The ultrasonic processing device for the main shaft of a hydro-generator set according to claim 2, characterized in that: A connecting plate (601) is provided between the slide (6) and the ultrasonic machining actuator (4).

4. The ultrasonic machining device for the main shaft of a hydro-generator set according to any one of claims 1 to 3, characterized in that: A conductive slip ring (7) is provided below the base assembly (1), a slide groove (701) is provided on the conductive slip ring (7), and a brush (702) is slidably mounted on the slide groove (701).

5. The ultrasonic processing device for the main shaft of a hydro-generator set according to claim 1, characterized in that: A base assembly (2) is provided on the base assembly (1), and the guide assembly (3), the drive mechanism (5) and the ultrasonic machining actuator (4) are arranged on the base assembly (2).

6. The ultrasonic processing device for the main shaft of a hydro-generator set according to claim 5, characterized in that: The base assembly (1) comprises a plurality of base bodies (101) with arc-shaped structures, and the ends of two adjacent base bodies (101) are positioned and connected together; the base assembly (2) comprises a plurality of base bodies (201) with arc-shaped structures and connected to the base bodies (101), and the ends of two adjacent base bodies (201) are positioned and connected together; After all the seat bodies (101) are connected and after all the base bodies (201) are connected, a ring body is formed that surrounds the periphery of the main shaft of the hydro-generator (503) group.

7. The ultrasonic processing device for the main shaft of a hydro-generator set according to claim 6, characterized in that: The bottom of each seat body (101) and the bottom of each base body (201) are provided with a plurality of abutting bosses (102); A plurality of weight-reducing grooves (103) are provided on each of the seat bodies (101) and each of the base bodies (201), and reinforcing ribs (104) are provided on the seat bodies (101) and the base bodies (201) located in the weight-reducing grooves (103); The end connection points of two adjacent seat bodies (101) and the end connection points of two adjacent base bodies (201) are staggered with each other.

8. The ultrasonic processing device for the main shaft of a hydro-generator set according to claim 6, characterized in that: The ends of two adjacent base bodies (101) and the ends of two adjacent base bodies (201) are both provided with a plug-in positioning combination structure of a positioning groove (105) and a positioning protrusion (106); Each of the base bodies (101) is provided with an arc-shaped extending positioning retaining ring (107), and the inner wall of the base body (201) is in contact with the positioning retaining ring (107); a plurality of avoidance grooves (205) are provided on the inner wall of each of the base bodies (201), and the base body (201) located in the avoidance grooves (205) is provided with a connection hole for connecting with the base body (101).

9. The ultrasonic processing device for the main shaft of a hydro-generator set according to claim 6, characterized in that: The guide assembly (3) comprises a plurality of guide rails (301) of an arc-shaped structure, and each guide rail (301) is fixedly mounted on the base (201); The driving mechanism (5) comprises a plurality of racks (501) of an arc-shaped structure, each of the racks (501) being fixedly mounted on the base (201); and further comprises a slide (502) slidably mounted on the guide rail (301), wherein the slide (502) is provided with a gear (504) driven by a motor and meshing with the racks (501); A washer (202), a rack retaining ring (203) and a guide rail retaining ring (204) are integrally formed on the base (201); the washer (202), the rack retaining ring (203) and the guide rail retaining ring (204) are arranged in a stepped manner from low to high; the diameter of the washer (202) is larger than the diameter of the rack retaining ring (203), and the diameter of the rack retaining ring (203) is larger than the diameter of the guide rail retaining ring (204); The pitch circle diameter of the rack (501) is larger than the diameter of the washer (202); the bottom of the rack (501) abuts against the washer (202), and the inner wall abuts against the rack retaining ring (203); the bottom of the guide rail (301) abuts against the rack retaining ring (203), and the inner wall abuts against the guide rail retaining ring (204).

10. The ultrasonic processing device for the main shaft of a hydro-generator set according to claim 9, characterized in that: The ultrasonic machining actuator (4) comprises a mounting seat (401) arranged on the slide (502), a slide plate (402) arranged along the Z axis and driven by a power mechanism is slidably mounted on the mounting seat (401), a slider (405) arranged along the Y axis and driven by a drive mechanism (5) is slidably mounted on the slider (402), and an ultrasonic machining tool is mounted on the slider (405).

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