A passivation device for a turbine wheel hub

Abstract

The present application relates to a kind of passivation treatment device suitable for steam turbine hub, including passivation treatment pool, passivation treatment pool is filled with passivation liquid, the upper portion of passivation treatment pool is equipped with conveying chain track, conveying chain track is slidably connected with conveying chain, conveying chain is respectively fixed with several hub lifting appliance on conveying chain, conveying chain track includes horizontal and continuous S type passivation groove rail section, passivation groove rail section is longitudinally arranged in the upper portion of passivation treatment pool, the front end of passivation groove rail section is shaped with the descending groove rail section, the upper end of descending groove rail section is located in the outer side of passivation treatment pool and is connected with horizontal input groove rail section;The rear end of the passivation groove rail section is shaped with the transversely inclined rising groove rail section, and the rising groove rail section is located in the outer side of the passivation treatment pool and is connected with the horizontal output groove rail section.The passivation treatment device of the present application uses conveying chain to realize the continuous passivation treatment of steam turbine hub, and the arrangement of groove rail can meet the passivation time of steam turbine hub without reducing the conveying speed.

Description

Technical Field

[0001] This invention relates to the technical field of passivation devices, and more specifically to a passivation treatment device suitable for turbine hubs. Background Technology

[0002] Passivation is a key process step in chemical cleaning, primarily used to form a dense protective film on metal surfaces to significantly reduce the corrosion rate and improve the material's corrosion resistance. This process is widely used for surface treatment of metals such as stainless steel, aluminum, magnesium, and their alloys. Before painting, automobile wheel rims typically require passivation treatment. There are various passivation methods, such as spraying and immersion. Immersion, which involves submerging the wheel rim in a passivation solution, is the most convenient method. It uses a conveyor chain to transport the wheel rim into the passivation tank containing the solution. However, due to differences in wheel rim material, the immersion passivation time varies from a few minutes to tens of minutes, requiring intermittent stops of the conveyor chain to ensure sufficient time. This results in slow overall conveying efficiency, severely impacting subsequent painting production and hindering overall production efficiency. Furthermore, current wheel rim hangers on the conveyor chain are generally placed on the inner surface of the wheel rim. During immersion passivation, parts of the inner surface are not covered by the hangers, requiring manual spraying of passivation solution onto the covered areas. Therefore, a continuous passivation treatment device is needed to solve these two problems. Summary of the Invention

[0003] The purpose of this invention is to address the shortcomings of existing technologies by providing a passivation treatment device suitable for turbine hubs. This device enables continuous passivation treatment of turbine hubs through a conveyor chain, and the arrangement of the grooved rails allows for the required passivation time of the turbine hubs without reducing the conveying speed.

[0004] A passivation treatment device for turbine hubs includes a passivation treatment tank filled with passivation liquid. A conveyor chain track is positioned above the passivation treatment tank and is erected within a factory building via several suspension rods. A conveyor chain is slidably connected to the conveyor chain track, and several hub lifting devices are fixed to the links of the conveyor chain. The conveyor chain track includes a horizontal, continuous S-shaped passivation groove section, which is longitudinally positioned directly above the passivation treatment tank. The front end of the passivation groove section has a laterally inclined descending groove section, the upper end of which is located outside the passivation treatment tank and connected to a horizontal input groove section. The rear end of the passivation groove section has a laterally inclined ascending groove section, located outside the passivation treatment tank and connected to a horizontal output groove section.

[0005] The described wheel hub sling includes a T-shaped articulated support, which is fixedly connected to the lower end face of the conveying chain link. Below the articulated support, there is a hanging frame with a "冂" - shaped longitudinal section. Two sets of front and rear hanging arms are fixedly connected to the upper part of the hanging frame. The upper ends of the hanging arms are located in the front and rear of the articulated support and are inserted and fixed with a longitudinal articulated shaft, and the articulated shaft is pivotally connected to the articulated support; at both ends of the lower part of the hanging frame, arc-shaped connecting arms are respectively formed. The lower end of the connecting arm is formed with an obliquely horizontal first supporting arm, the lower end of the first supporting arm is formed with a horizontally transverse connecting arm, and the end of the connecting arm is formed between two obliquely horizontal second supporting arms. Longitudinal bearing rods are fixedly connected between the second supporting arms and between the first supporting arms of the hanging frame. On the bearing rods on both sides of the connecting arm, a number of obliquely arranged and symmetric supporting seats are respectively fixed;

[0006] A vertical positioning sleeve is inserted and fixed in the hanging frame. A vertical pressing rod is inserted into the positioning sleeve. The lower end of the pressing rod is formed with a spherical pressing seat, and ball bearings are embedded in both the pressing seat and the supporting seat; A spring and a limit retaining ring are inserted into the positioning sleeve. The upper end of the spring abuts against the hanging frame, the lower end is inserted and sleeved on the upper end of the pressing rod and abuts against the limit retaining ring, and the limit retaining ring is inserted and fixed on the pressing rod; An annular end cover is sleeved on the pressing rod, and the end cover is fixed on the lower end face of the positioning sleeve.

[0007] Preferably, a steam turbine wheel hub is placed on the described wheel hub sling. The ball bearings on the supporting seats respectively abut against the outer walls on both sides of the lower part of the steam turbine wheel hub, and the ball bearings on the pressing seat press against the outer wall on the top of the steam turbine wheel hub;

[0008] At least two sets of supporting seats are provided on the bearing rod.

[0009] Preferably, on both sides of the upper part of the passivation treatment tank, connecting grooves that are obliquely arranged and extend to both sides are respectively formed, and the connecting grooves are respectively located directly below the descending groove track section and the ascending groove track section;

[0010] In the middle of the passivation treatment tank, a limit support opposite to the wheel hub sling on the passivation groove track section is fixedly connected. The limit support includes a limit baffle with an arc-shaped top. Obliquely arranged support plates are formed on both sides of the limit baffle. A T-shaped bracket is fixedly connected between the support plates, and the lower end of the bracket is fixedly connected to the inner bottom surface of the passivation treatment tank; A number of support rods are fixedly connected to the bracket, and the support rods are fixedly connected to the lower surface of the limit baffle.

[0011] Preferably, the conveyor chain has an "I" shaped cross-section, and the conveyor chain track includes several sets of chain links, with adjacent chain links hinged together by universal joints; each chain link includes a horizontal upper chain link plate and a lower chain link plate, with two sets of rollers inserted between the upper and lower chain link plates, and the rollers are respectively hinged to the upper and lower chain link plates by pins; the hinged support on the hub hanger is fixed to the lower chain link plate; the upper chain link plate is fixedly provided with lugs, which are distributed on the front and rear sides of the conveyor chain track and pivotally connected to pulleys, which are inserted and abut against the conveyor chain track.

[0012] Preferably, the upper end of the positioning sleeve abuts against the middle of the hanger, and ribs are fixedly connected to the two side walls of the middle of the positioning sleeve, and the ribs are fixedly connected to the inner side wall of the hanger.

[0013] Preferably, the positioning sleeve is formed with an inverted L-shaped limiting groove, and a control handle is inserted into the limiting groove. The end of the control handle is fixed to the pressing rod on the lower side of the limiting retaining ring.

[0014] Preferably, the tilting direction of the first support arm on the hanger is opposite to that of the second support arm, and the end of the second support arm is fixedly connected to a longitudinal and cylindrical anti-collision shaft, on which a Teflon sleeve is inserted.

[0015] Preferably, the width of the upper limit baffle of the limit bracket in the passivation treatment pool is less than the distance between the two sets of connecting arms on the wheel hub hanger, the width of the limit baffle is consistent with the width of the support plate, and the upper surfaces of the limit baffle and the support plate are provided with Teflon coating.

[0016] The beneficial effects of this invention are as follows:

[0017] This passivation treatment device uses a conveyor chain to achieve continuous passivation treatment of turbine hubs. Based on the arrangement of the groove rails, it can meet the passivation time of the turbine hubs without reducing the conveying speed; and it can achieve passivation treatment of the entire surface of the hub ring. Attached Figure Description

[0018] Figure 1 This is a frontal structural diagram of the present invention;

[0019] Figure 2 This is a three-dimensional structural diagram of the conveyor chain track section of the present invention;

[0020] Figure 3 This is a side view of the inner hub hanger of the present invention.

[0021] Figure 4 This is a three-dimensional structural diagram of the inner hub lifting device of the present invention;

[0022] Figure 5 This is a cross-sectional view of the inner hub lifting device of the present invention from the front view.

[0023] In the diagram: 1. Passivation treatment tank; 11. Connecting groove; 2. Conveyor chain track; 21. Passivation groove section; 22. Input groove section; 23. Output groove section; 24. Descending groove section; 25. Ascending groove section; 3. Lifting rod; 4. Conveyor chain; 5. Hub lifting device; 51. Hinge support; 52. Hanger; 53. Lifting arm; 54. Hinge shaft; 55. Bearing rod; 56. Supporting support; 57. Positioning sleeve; 58. Holding rod; 59. Ball bearing; 510. Spring; 511. Limiting ring; 512. End cap; 513. Control handle; 514. Rib plate; 515. Anti-collision shaft; 6. Limiting bracket. Detailed Implementation

[0024] Example: See Figures 1 to 5 As shown, a passivation treatment device suitable for turbine hubs includes a passivation treatment tank 1 containing a passivation liquid. A conveyor chain track 2 is positioned above the passivation treatment tank 1 and is erected within a factory building via several lifting rods 3. A conveyor chain 4 is slidably connected to the conveyor chain track 2, and several hub lifting devices 5 are fixed to the links of the conveyor chain 4. The conveyor chain track 2 includes a horizontally continuous S-shaped passivation groove section 21, which is longitudinally positioned directly above the passivation treatment tank 1. A transversely inclined descending groove section 24 is formed at the front end of the passivation groove section 21, with its upper end located outside the passivation treatment tank 1 and connected to a horizontal input groove section 22. A transversely inclined ascending groove section 25 is formed at the rear end of the passivation groove section 21, with its ascending groove section 24 located outside the passivation treatment tank 1 and connected to a horizontal output groove section 23.

[0025] The hub hanger 5 includes a T-shaped hinged support 51, which is fixedly connected to the lower end face of the conveyor chain 4 link. Below the hinged support 51 is a hanger 52 with a longitudinal cross-section in the shape of a "U". Two sets of front and rear booms 53 are fixedly connected to the upper part of the hanger 52. The upper ends of the booms 53 are located on the front and rear sides of the hinged support 51 and are inserted and fixed with longitudinal hinge shafts 54. The hinge shafts 54 are pivotally connected to the hinged support 51. The lower ends of the hanger 52 are respectively formed with arc-shaped connecting parts. Arm 521, the lower end of the connecting arm 521 is formed with a first support arm 522 that is inclined and transverse, the lower end of the first support arm 522 is formed with a horizontal connecting arm 523, the end of the connecting arm 523 is formed with a second support arm 522 that is inclined and transverse, longitudinal bearing rods 55 are fixed between the second support arms 522 and between the first support arms 522 of the hanger 52, and several inclined and symmetrical support supports 56 are fixed on the bearing rods 55 on both sides of the connecting arm 523.

[0026] A vertical positioning sleeve 57 is inserted and fixed inside the hanger 52. A vertical pressing rod 58 is inserted inside the positioning sleeve 57. The lower end of the pressing rod 58 is formed into a spherical pressing seat 581. Both the pressing seat 581 and the support 56 are embedded with ball bearings 59. A spring 510 and a limiting ring 511 are inserted inside the positioning sleeve 57. The upper end of the spring 510 abuts against the hanger 52, and the lower end is inserted into the upper end of the pressing rod 58 and abuts against the limiting ring 511. The limiting ring 511 is inserted and fixed on the pressing rod 58. An annular end cap 512 is fitted on the pressing rod 58 and fixed to the lower end face of the positioning sleeve 57.

[0027] The hub hanger 5 holds a turbine hub, and its passivation groove section 21 is composed of longitudinally distributed transverse grooves and arc-shaped grooves between the ends of the transverse grooves. The distance between adjacent transverse grooves on the passivation groove section 21 is greater than the length of the turbine hub, so that the turbine hub will not collide in the passivation treatment pool 1. The balls 59 on the support 56 abut against the outer walls on both sides of the lower part of the turbine hub, and the balls 59 on the pressure seat 581 press against the outer wall of the top of the turbine hub.

[0028] The bearing rod 55 is provided with at least two sets of support seats 56, the ball bearings 59 on the support seats 56 support the turbine hub, and the ball bearings 59 on the pressure seat 581 limit the position of the turbine hub.

[0029] The upper two sides of the passivation treatment pool 1 are respectively formed with inclined connecting grooves 11 extending to both sides. The connecting grooves 11 are located directly below the descending groove section 24 and the ascending groove section 25. The setting of the connecting grooves 11 can prevent the wheel hub hanger 5 from colliding with the passivation treatment pool 1 during the lifting process, and can also receive the passivation liquid falling from the wheel hub hanger 5 or the car wheel hub.

[0030] A limiting bracket 6 is fixedly connected to the middle of the passivation treatment pool 1, which is opposite to the wheel hub hanger 5 on the passivation groove track section 21. The limiting bracket 6 includes a top arc-shaped limiting baffle, and inclined support plates are formed on both sides of the limiting baffle. A T-shaped bracket is fixedly connected between the support plates. The lower end of the bracket is fixedly connected to the bottom surface inside the passivation treatment pool 1. Several support rods are fixedly connected to the bracket. The support rods are fixedly connected to the lower surface of the limiting baffle. When the wheel hub hanger 5 passes the limiting bracket 6, the car wheel hub on the wheel hub hanger 5 will contact the upper part of the limiting baffle. The friction between the two causes the car wheel hub to rotate inside the wheel hub hanger 5. As a result, the contact point position between the wheel hub hangers 5 and the wheel hub hanger 6 changes, so that the outer wall of the wheel hub, which was originally blocked by the ball bearing 59, contacts the passivation liquid.

[0031] The conveyor chain 4 has an "I" shaped cross section. The conveyor chain track 2 includes several sets of chain links, and adjacent chain links are hinged together by universal joints. Each chain link includes a horizontal upper chain link plate and a lower chain link plate. Two sets of rollers are inserted between the upper and lower chain link plates. The rollers are respectively hinged to the upper and lower chain link plates by pins. The hinged support 51 on the hub hanger 5 is fixed to the lower chain link plate. The upper chain link plate is fixed with lugs, which are distributed on the front and rear sides of the conveyor chain track 2 and pivotally connected to pulleys. The pulleys are inserted and abut against the conveyor chain track 2. The chain links of the conveyor chain 4 with the above structure can rotate relative to each other, so as not to get stuck on the conveyor chain track 2.

[0032] The upper end of the positioning sleeve 57 abuts against the middle of the hanger 52. Ribs 514 are fixed to the two side walls of the middle part of the positioning sleeve 57 respectively. The ribs 514 are fixed to the inner side wall of the hanger 52. This is a way of fixing the positioning sleeve 57, so that the distance between the lower connecting arms 521 of the hanger 52 is not limited by the diameter of the positioning sleeve 57, and thus the connecting arms 521 have a corresponding distance to stably support the car wheel hub.

[0033] The positioning sleeve 57 has an inverted L-shaped limiting groove 571 formed on it. A control handle 513 is inserted into the limiting groove 571. The end of the control handle 513 is fixed to the holding rod 58 on the lower side of the limiting retaining ring 511. When the car wheel needs to be placed into or removed from the wheel hub hanger 5, the holding rod 58 will interfere. By holding the control handle 513, the holding rod 58 can be driven to move upward and the control handle 513 can be moved laterally to achieve the positioning of the holding rod 58 after it moves upward. This makes it convenient for the car wheel to enter and exit the wheel hub hanger 5.

[0034] The tilting direction of the first support arm 522 on the hanger 52 is opposite to that of the second support arm 522. The end of the second support arm 522 is fixed with a longitudinal and cylindrical anti-collision shaft 515. A Teflon sleeve is inserted into the anti-collision shaft 515. Teflon material has good acid and alkali resistance and will not be corroded by passivation liquid. At the same time, its hardness is low, lower than that of aluminum alloy, so that aluminum wheels will not be damaged when they hit the Teflon sleeve.

[0035] The width of the upper limit baffle in the limit bracket 6 of the passivation treatment pool 1 is less than the distance between the two sets of connecting arms 521 on the hub hanger 5. The width of the limit baffle is the same as the width of the support plate. The upper surfaces of the limit baffle and the support plate are coated with Teflon. Similarly, the aluminum wheel rotates based on the friction with the limit baffle. The Teflon coating can prevent friction scratches from appearing on the outer wall of the aluminum wheel.

[0036] Working principle: This structure is a passivation treatment device suitable for steam turbine hubs. The passivation treatment device uses a conveyor chain track 2 with a conveyor chain 4. The conveyor chain 4 is equipped with a hub lifting device 5. The hub lifting device 5 moves along the conveyor chain track 2 to enter the passivation treatment pool 1. The conveyor chain track 2 is provided with a horizontal and continuous S-shaped passivation groove track section 21 directly above the passivation treatment pool 1, thereby extending the time that the hub lifting device 5 spends in the passivation treatment pool 1 and reducing the conveying speed of the hub.

[0037] In addition, a special lifting tool with passivation treatment was designed. The lifting tool uses ball bearings 59 to support the outer wall of the wheel hub to connect the wheel hub to the wheel hub lifting tool 5. First of all, the contact point between the ball bearings 59 and the wheel hub is small; and the contact point is the outer wall of the wheel hub, which is located inside the tire and is protected by the tire. It is not the exposed inner surface of the wheel hub during subsequent installation, so the impact is relatively weak.

[0038] Furthermore, when the wheel hub is lifted by the wheel hub 5 and moved in the passivation treatment tank 1, there will be resistance between it and the passivation liquid (the faster the conveying speed, the greater the resistance). This resistance will drive the wheel hub to rotate slightly, and the part blocked by the ball 59 will also come into contact with the passivation liquid.

[0039] Of course, there are also situations where the fluid resistance cannot drive the wheel hub to rotate (such as when the wheel hub is too heavy). In such cases, a limiting bracket 6 is added to achieve relative rotation of the wheel hub by utilizing the friction between the wheel hub and the limiting bracket 6 during the wheel hub's movement.

[0040] The embodiments described are illustrative of the invention and are not intended to limit the invention. Any person skilled in the art can modify the embodiments without departing from the spirit and scope of the invention; therefore, the scope of protection of the invention should be as set forth in the claims.

Claims

1. A passivation treatment device suitable for turbine hubs, comprising a passivation treatment tank (1), the passivation treatment tank (1) containing a passivation liquid, a conveyor chain track (2) above the passivation treatment tank (1), the conveyor chain track (2) being erected in a factory building by a plurality of lifting rods (3); a conveyor chain (4) is slidably connected to the conveyor chain track (2), and a plurality of hub lifting devices (5) are fixedly connected to the links of the conveyor chain (4), characterized in that: The described conveying chain track (2) includes a passivation tank track section (21) that is horizontal and continuously S-shaped. The passivation tank track section (21) is longitudinally arranged directly above the passivation treatment tank (1). At the front end of the passivation tank track section (21), a laterally inclined downward tank track section (24) is formed. The upper end of the downward tank track section (24) is located outside the passivation treatment tank (1) and is connected to the horizontal input tank track section (22). At the rear end of the passivation tank track section (21), a laterally inclined upward tank track section (25) is formed. The upward tank track section (24) is located outside the passivation treatment tank (1) and is connected to the horizontal output tank track section (23). The described hub sling (5) includes a T-shaped hinge support (51). The hinge support (51) is fixedly connected to the lower end face of the link of the conveying chain (4). Below the hinge support (51), there is a hanger (52) with a longitudinal section in the shape of "冂". At the upper part of the hanger (52), two groups of front and rear lifting arms (53) are fixedly connected. The upper ends of the lifting arms (53) are located in front of and behind the hinge support (51) and are inserted and fixed with a longitudinal hinge shaft (54). The hinge shaft (54) is pivotally connected to the hinge support (51). At both ends of the lower part of the hanger (52), arc-shaped connecting arms (521) are respectively formed. At the lower end of the connecting arm (521), a laterally inclined first supporting arm (522) is formed. At the lower end of the first supporting arm (522), a horizontally transverse connecting arm (523) is formed. At the end of the connecting arm (523), a laterally inclined second supporting arm (522) is formed. Between the second supporting arms (522) of the hanger (52) and between the first supporting arms (522), longitudinal supporting rods (55) are respectively fixedly connected. On the supporting rods (55) on both sides of the connecting arm (523), a number of obliquely arranged and symmetric supporting seats (56) are respectively fixed. A vertical positioning sleeve (57) is inserted and fixed in the hanger (52). A vertical pressing rod (58) is inserted into the positioning sleeve (57). At the lower end of the pressing rod (58), a spherical shell-shaped pressing seat (581) is formed. Ball bearings (59) are embedded in both the pressing seat (581) and the supporting seat (56). A spring (510) and a limiting retaining ring (511) are inserted into the positioning sleeve (57). The upper end of the spring (510) abuts against the hanger (52), and the lower end is inserted into and abuts against the upper end of the pressing rod (58) and abuts against the limiting retaining ring (511). The limiting retaining ring (511) is inserted and fixed on the pressing rod (58). An annular end cover (512) is sleeved on the pressing rod (58). The end cover (512) is fixed on the lower end face of the positioning sleeve (57).

2. The passivation treatment device for turbine hubs according to claim 1, characterized in that: A steam turbine hub is placed on the hub sling (5). The ball bearings (59) on the supporting seats (56) respectively abut against the outer walls on both sides of the lower part of the steam turbine hub, and the ball bearings (59) on the pressing seat (581) press against the outer wall on the top of the steam turbine hub. There are at least two groups of supporting seats (56) provided on the supporting rod (55).

3. The passivation treatment device for turbine hubs according to claim 2, characterized in that: The passivation treatment pool (1) has two side walls at the top with inclined connecting grooves (11) extending to both sides. The connecting grooves (11) are located directly below the descending groove section (24) and the ascending groove section (25), respectively. The passivation treatment pool (1) is fixedly connected to a limiting bracket (6) opposite to the hub hanger (5) on the passivation groove track section (21). The limiting bracket (6) includes a top arc-shaped limiting baffle. The limiting baffle has inclined support plates formed on both sides. A T-shaped bracket is fixedly connected between the support plates. The lower end of the bracket is fixedly connected to the bottom surface inside the passivation treatment pool (1). Several support rods are fixedly connected to the bracket. The support rods are fixedly connected to the lower surface of the limiting baffle.

4. The passivation treatment device for turbine hubs according to claim 1, characterized in that: The cross-section of the conveyor chain (4) is in the shape of an "I". The conveyor chain track (2) includes several sets of chain links. Adjacent chain links are hinged together by universal joints. The chain link includes a horizontal upper chain link plate and a lower chain link plate. Two sets of rollers are inserted between the upper chain link plate and the lower chain link plate. The rollers are respectively hinged to the upper chain link plate and the lower chain link plate by pins. The hinge support (51) on the hub hanger (5) is fixed to the lower chain link plate. The upper chain link plate is fixed with lugs. The lugs are distributed on the front and rear sides of the conveyor chain track (2) and are pivotally connected to pulleys. The pulleys are inserted and abut against the conveyor chain track (2).

5. The passivation treatment device for turbine hubs according to claim 1, characterized in that: The upper end of the positioning sleeve (57) abuts against the middle of the hanger (52), and ribs (514) are fixedly connected to the two side walls of the middle part of the positioning sleeve (57), and the ribs (514) are fixedly connected to the inner side wall of the hanger (52).

6. The passivation treatment device for turbine hubs according to claim 5, characterized in that: The positioning sleeve (57) has an inverted L-shaped limiting groove (571) formed on it. A control handle (513) is inserted into the limiting groove (571). The end of the control handle (513) is fixed to the pressing rod (58) on the lower side of the limiting retaining ring (511).

7. The passivation treatment device for turbine hubs according to claim 1, characterized in that: The tilting direction of the first support arm (522) on the hanger (52) is opposite to that of the second support arm (522). The end of the second support arm (522) is fixed with a longitudinal and cylindrical anti-collision shaft (515), and a Teflon sleeve is inserted on the anti-collision shaft (515).

8. The passivation treatment device for turbine hubs according to claim 3, characterized in that: The width of the upper limit baffle of the limit bracket (6) in the passivation treatment pool (1) is less than the distance between the two sets of connecting arms (521) on the hub hanger (5). The width of the limit baffle is consistent with the width of the support plate. The upper surfaces of the limit baffle and the support plate are coated with Teflon.

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