A kind of nano plating technology prevents turbine bearing bush electric corrosion with fixture

Abstract

The present application relates to the technical field of steam turbine bearing bush protection, and particularly relates to a nano-coating technology clamp for preventing steam turbine bearing bush electric corrosion, which comprises a structural member and a mounting member, the mounting member is arranged on the upper side of the structural member, a clamping assembly, a limiting assembly, the clamping assembly comprises a moving member arranged in the structural member, a clamping member arranged in the mounting member and a reset member arranged in the mounting member, the limiting assembly comprises a limiting member and a pressing member, the clamping assembly and the limiting assembly are used in cooperation, the clamping member comprises a mounting pipe slidingly arranged in the structural member and the mounting member, a mounting table arranged on the inner wall of the mounting pipe, a special-shaped clamping block rotatably arranged on the outer side of the rotating shaft and a first slot opened on one side of the mounting pipe, one end of the special-shaped clamping block is connected with the mounting table, the other end of the special-shaped clamping block extends out of the first slot and is in contact with the annular protrusion, the steam turbine bearing bush can be quickly clamped and fixed, the operation is simple and convenient, the clamping and fixing efficiency of the device is improved, and the electroplating protection efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of steam turbine bearing bush protection, and particularly relates to a clamp for preventing steam turbine bearing bush electric corrosion by using nano plating technology. BACKGROUND

[0002] The DLC nano passivation treatment is performed on the steam turbine bearing bush and the bearing bush axial positioning plug, so that a layer of high hardness, good wear resistance and high insulation resistance is formed on the metal surface. The DLC (Diamond Like Carbon) is mainly synthesized by using PVD or PACVD process at a temperature of 100 DEG C-300 DEG C, has good wear resistance, lubricity, and has electrical insulation, chemical stability and light transmittance, and the plating film can cover iron or non-ferrous metal and plastic, ceramic. The main carbon coating is composed of DLC (a-C:H), ta-C and Diamond coating according to the hydrogen content and the interatomic bonding, and the steam turbine bearing bush needs to be clamped and fixed before operation, and a clamp needs to be used for auxiliary clamping. However, the existing clamping device is complicated to operate during use, and it is difficult to quickly clamp and fix, so as to affect the electroplating efficiency of the steam turbine bearing bush, and great inconvenience is brought. SUMMARY

[0003] This section is intended to summarize some aspects of the embodiments of the present application and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract of the specification and the title of the application in order to avoid obscuring the purpose of this section, the abstract of the specification and the title of the application, and such simplifications or omissions cannot be used to limit the scope of the present application.

[0004] In view of the problems existing in the prior art of nano plating technology for preventing steam turbine bearing bush electric corrosion, the present application is proposed.

[0005] Therefore, the present application aims to provide a clamp for preventing steam turbine bearing bush electric corrosion by using nano plating technology, which aims to: quickly clamp and fix the steam turbine bearing bush before electroplating, and the clamping and fixing operation is convenient, and the electroplating efficiency of the steam turbine bearing bush is improved.

[0006] To solve the above technical problems, the present application provides the following technical solutions: a structure assembly, comprising a structure member and a mounting member arranged on the upper side of the structure member, a clamping assembly, comprising a moving member arranged in the structure member, a clamping member arranged in the mounting member, and a reset member arranged in the mounting member, a limiting assembly, comprising a limiting member and a pressing member arranged in the moving member, the structure member comprising a turbine bearing body and an annular protrusion inside the turbine bearing body, the mounting member comprising a mounting sleeve arranged on the upper side of the structure member and a rotating shaft arranged in the mounting sleeve, the clamping member comprising a mounting pipe slidingly arranged in the structure member and the mounting member, a mounting table arranged on the inner wall of the mounting pipe, a special-shaped clamping block rotatingly arranged on the outer side of the rotating shaft, and a first slot arranged on one side of the mounting pipe, one end of the special-shaped clamping block being connected with the mounting table, and the other end of the special-shaped clamping block extending out of the first slot and being in contact with the annular protrusion.

[0007] As a preferred scheme of the clamp for preventing electric corrosion of the turbine bearing by the nano-coating technology, the structure member comprises a fixed block and a through slot arranged on the side wall of the fixed block, the mounting member further comprises an embedding opening arranged on the inner side of the mounting sleeve, and the other end of the special-shaped clamping block extends out of the first slot and the embedding opening and is in contact with the annular protrusion.

[0008] As a preferred scheme of the clamp for preventing electric corrosion of the turbine bearing by the nano-coating technology, the moving member comprises a sliding column slidingly arranged in the through slot and a wedge-shaped block arranged on one side of the sliding column, and the moving member comprises a pull plate arranged on one side of the sliding column.

[0009] As a preferred scheme of the clamp for preventing electric corrosion of the turbine bearing by the nano-coating technology, the clamping member further comprises a second slot arranged on the side wall of the mounting pipe, and the second slot is matched with the inclined surface part of the wedge-shaped block.

[0010] As a preferred scheme of the clamp for preventing electric corrosion of the turbine bearing by the nano-coating technology, the reset member comprises a reset spring arranged on the upper side of the mounting pipe and a fixed plate arranged on the upper side of the mounting sleeve, and the two sides of the reset spring are respectively connected with the inner wall of the mounting pipe and the side wall of the fixed plate.

[0011] As a preferred scheme of the clamp for preventing electric corrosion of the turbine bearing by the nano-coating technology, the limiting member comprises a mounting slot arranged on the upper side of the inclined surface of the wedge-shaped block and a sliding block slidingly arranged in the mounting slot, the limiting member further comprises a compression spring arranged on the inner side of the mounting slot and a limiting block arranged on the upper side of the sliding block.

[0012] As a preferred scheme of the clamp for preventing electric corrosion of the turbine bearing by the nano-coating technology, the limiting member further comprises a limiting plate arranged on one side of the wedge-shaped block.

[0013] As a preferred scheme of the clamp for preventing electric corrosion of the turbine bearing bushing by the nano-plating technology, the extrusion piece comprises a sliding groove arranged on one side of the sliding column, a third slot arranged on one side of the sliding block and a pull rod slidingly arranged in the sliding groove, and the pull rod penetrates through the third slot and is in sliding connection with the third slot.

[0014] As a preferred scheme of the clamp for preventing electric corrosion of the turbine bearing bushing by the nano-plating technology, the extrusion piece further comprises an arc-shaped extrusion block slidingly arranged on one side of the pull rod and a tension spring arranged on the inner side of the pull rod, and the elastic coefficient of the tension spring is greater than the elastic coefficient of the compression spring.

[0015] As a preferred scheme of the clamp for preventing electric corrosion of the turbine bearing bushing by the nano-plating technology, the extrusion piece further comprises a pull ring arranged on one side of the pull rod.

[0016] The beneficial effects of the present application are as follows: the clamping assembly and the limiting assembly are used in cooperation, the clamping piece comprises a mounting tube slidingly arranged in the structure piece and the mounting piece, a mounting table arranged on the inner wall of the mounting tube, a special-shaped clamping block rotationally arranged on the outer side of the rotating shaft and a first slot arranged on one side of the mounting tube, one end of the special-shaped clamping block is connected with the mounting table, the other end of the special-shaped clamping block extends out of the first slot and is in contact with the annular protrusion, the turbine bearing bushing can be quickly clamped and fixed, the operation is simple and convenient, the clamping and fixing efficiency of the device is improved, the plating protection efficiency is improved, the operation of the existing clamping device is not cumbersome in the use process, the turbine bearing bushing cannot be quickly clamped and fixed, and the inconvenience of affecting the plating efficiency of the turbine bearing bushing is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor. Among them:

[0018] Figure 1 It is a schematic view of the overall structure of the present application.

[0019] Figure 2 It is a top view of the present application.

[0020] Figure 3 It is a schematic view of the cross-sectional structure of the present application.

[0021] Figure 4 It is Figure 3 It is an enlarged view of structure A in the middle.

[0022] Figure 5 It is a sectional view of the fixing block in the present application.

[0023] Figure 6 is a sectional view of the present application.

[0024] Figure 7 is a structural schematic diagram of the extrusion part in the present application.

[0025] Figure 8 is a structural schematic diagram of the installation pipe in the present application.

[0026] Figure 9 is a structural schematic diagram of the wedge block in the present application. DETAILED DESCRIPTION

[0027] In order to make the above objectives, features and advantages of the present application more apparent, the specific embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0028] In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, it will be apparent to one skilled in the art that the present application can be practiced without the specific details and other implementations can be employed. In other instances, well-known methods have not been described in detail in order not to unnecessarily obscure aspects of the present application.

[0029] Secondly, the term "one embodiment" or "an embodiment" as used herein means that a particular implementation can include a particular feature, structure, or characteristic, but every embodiment can not necessarily include the particular feature, structure, or characteristic. Furthermore, the following claims can refer to "one embodiment" or "an embodiment" in the sense of claiming a particular feature, structure, or characteristic of more than one embodiment.

[0030] Thirdly, the present application is described in detail with reference to the accompanying drawings. In the detailed description of the embodiments of the present application, the sectional view of the device structure is partially enlarged without the general proportion for the convenience of description, and the schematic diagram is only an example which should not limit the scope of protection of the present application. In addition, the three-dimensional spatial dimensions including length, width and depth should be included in the actual manufacture.

[0031] Example 1

[0032] Reference Figures 1-4For the first embodiment of the present application, a kind of nano-coating technology is provided to prevent turbine bearing bush electric corrosion with fixture, this device includes structural component 100, including structural member 101 and mounting piece 102, structural member is the support part of entire device, mounting piece 102 is set to the upper side of structural member 101, mounting piece 102 is used to install partial clamping assembly 200, clamping assembly 200, including setting in structural member 101 mobile 201, setting in mounting piece 102 clamping piece 202, and setting in mounting piece 102 reset piece 203, limiting assembly 300, clamping piece 202 is used to clamp and fix the processing of turbine bearing, mobile 201 is used to drive clamping piece to be clamped and fixed by moving and process, including limiting piece 301 and extrusion piece 302, limiting piece 301 and extrusion piece 302 are set in mobile 201, limiting piece 301 is used to limit the processing of clamping piece after clamping, improve its stability, extrusion piece 302 is used to extrude limiting piece 301, to remove limit.

[0033] Specifically, structural member 101 includes turbine bearing body 101a and its internal annular boss 101b, mounting piece 102 includes installation sleeve 102a set on the upper side of structural member 101 and rotationally set in installation sleeve internal shaft 102b, clamping piece 202 includes installation tube 202a slidably set in structural member 101 and mounting piece 102, installation platform 202b set on the inner wall of installation tube 202a, profiled clamp block 202c rotationally set on the outer side of shaft 102b and first slot 202d opened on one side of installation tube 202a, one end of profiled clamp block 202c is fixedly connected with installation platform 202b, the other end extends out of first slot 202d and contacts with annular boss 101b, profiled clamp block 202c can rotate around shaft 102b.

[0034] Further, the structure member 101 comprises a fixing block 101c and a through slot 101d formed in the side wall of the fixing block 101c, the mounting member 102 further comprises an embedding opening 102c formed in the inner side of the mounting sleeve 102a, the other end of the embedding opening 102c and the annular protrusion 101b are in contact, the special-shaped clamping block 202c can be extended out of the embedding opening 102c and the first slot 202d to clamp the annular protrusion 101b, so that the steam turbine bearing can be quickly clamped and fixed, the moving member 201 comprises a sliding column 201a slidably arranged in the through slot 101d and a wedge-shaped block 201b arranged on one side of the sliding column 201a, one side of the wedge-shaped block 201b is provided with an inclined portion, and the inclined portion is in contact with the second slot 202e of the mounting pipe, the moving member 201 comprises a pull plate 201c arranged on one side of the sliding column 201a, the pull plate 201c is fixedly arranged on the side wall of the sliding column 201a, and the pull plate 201c can facilitate pulling the sliding column 201a and the wedge-shaped block 201b, so as to facilitate movement, and the sliding column 201a and the wedge-shaped block 201b can slide in the through slot 101d through the through slot 101d.

[0035] The clamping member 202 further comprises a second slot 202e formed in the side wall of the mounting pipe 202a, and the second slot 202e is matched with the inclined surface of the wedge-shaped block 201b, so that the wedge-shaped block 201b can drive the mounting pipe 202a to move up and down during sliding.

[0036] In use, after the steam turbine bearing body 101a to be clamped is placed on the upper side of the fixing block 101c and is sleeved outside the mounting sleeve 102a, the sliding column 201a is pressed and pulled inward, the sliding column 201a drives the wedge-shaped block 201b to slide, the wedge-shaped block 201b passes through the second slot 202e in the side wall of the mounting pipe 202a and extrudes the mounting pipe 202a to drive it to slide upward, so as to drive the special-shaped clamping block 202c to rotate, and since the special-shaped clamping block 202c is arranged outside the rotating shaft 102b and the other end is fixedly arranged on the mounting table 202b, when the mounting pipe 202a slides upward, the special-shaped clamping block 202c rotates to make the other end of the first slot 202d in contact with the annular protrusion 101b to press and fix the annular protrusion 101b, so that the steam turbine bearing body 101a can be quickly clamped and fixed.

[0037] Embodiment 2

[0038] Reference Figures 3-5 For the second embodiment of the application, the difference between this embodiment and the first embodiment is that the reset member 203 comprises a reset spring 203a arranged on the upper side of the mounting pipe 202a and a fixing plate 203b arranged on the upper side of the mounting sleeve 102a, the two sides of the reset spring 203a are connected with the inner wall of the mounting pipe 202a and the side wall of the fixing plate 203b respectively, and the reset spring 203a is used for assisting the reset of the mounting pipe 202a.

[0039] Specifically, the limiting piece 301 includes a mounting groove 301a opened on the upper side of the inclined block 201b and a sliding block 301b slidingly arranged in the mounting groove 301a, the limiting piece 301 further includes a compression spring 301c arranged on the inner side of the mounting groove 301a and a limiting block 301d arranged on the upper side of the sliding block 301b, the limiting block 301d is used to limit the installation pipe 202a during clamping and fixing, the limiting piece 301 further includes a limiting plate 301e arranged on one side of the inclined block 201b, the inclined surface part of the limiting block 301d is matched with the second notch 202e, when moving, the second notch 202e of the installation pipe 202a can extrude the inclined block 201b to press it into the mounting groove 301a, and then the elastic force of the compression spring 301c drives the limiting block 301d to reset, at this time, the vertical surface of the limiting block 301d is in contact with the side wall of the installation pipe 202a to limit it, thereby improving the clamping effect.

[0040] In use: the pull rod 201a is pressed and pulled, the pull rod 201a drives the inclined block 201b to slide, the inclined block 201b passes through the second notch 202e of the side wall of the installation pipe 202a, extrudes the installation pipe 202a to drive it to slide upward, thereby driving the special-shaped clamping block 202c to rotate, since the special-shaped clamping block 202c is arranged outside the rotating shaft 102b and the other end is fixedly arranged with the installation table 202b, when the installation pipe 202a slides upward, the special-shaped clamping block 202c rotates to make the other end protrude from the first notch 202d to contact the annular protrusion 101b to press and fix it, when moving, the second notch 202e of the installation pipe 202a can extrude the inclined block 201b to press it into the mounting groove 301a, and then the elastic force of the compression spring 301c drives the limiting block 301d to reset, at this time, the vertical surface of the limiting block 301d is in contact with the side wall of the installation pipe 202a to limit it, thereby improving the clamping effect, and the limiting plate 301e can limit it at the lowest point to reduce the possibility of the inclined block 201b falling off.

[0041] The remaining structure is the same as that of example 1.

[0042] Example 3

[0043] Reference Figures 3-8For the third embodiment of the present application, which is different from the second embodiment, the limiting member 301 comprises a mounting groove 301a formed on the upper side of the inclined surface of the wedge-shaped block 201b and a sliding block 301b slidingly arranged in the mounting groove 301a, the limiting member 301 further comprises a compression spring 301c arranged on the inner side of the mounting groove 301a and a limiting block 301d arranged on the upper side of the sliding block 301b, the limiting block 301d is used to limit the installation pipe 202a during clamping and fixing, the limiting member 301 further comprises a limiting plate 301e arranged on one side of the wedge-shaped block 201b, the inclined surface part of the limiting block 301d is matched with the second slot 202e, when moving, the second slot 202e of the installation pipe 202a can extrude the wedge-shaped block 201b to press it into the mounting groove 301a, and then the elastic force of the compression spring 301c drives the limiting block 301d to reset, at this time, the vertical surface of the limiting block 301d is in contact with the side wall of the installation pipe 202a to limit it, thereby improving the clamping effect

[0044] The extruding member 302 comprises a sliding groove 302a arranged on one side of the sliding column 201a, a third slot 302b arranged on one side of the sliding block 301b, and a pull rod 302c slidingly arranged in the sliding groove 302a, the pull rod 302c penetrates through the third slot 302b and is slidingly connected with the third slot 302b, the height of the pull rod 302c is lower than half of the height of the third slot 302b, so that when the limiting block 301d moves downward, the third slot 302b will not be stuck by the pull rod 302c and can slide downward.

[0045] Further, the extruding member 302 further comprises an arc-shaped extruding block 302d slidingly arranged on one side of the pull rod 302c and a tension spring 302e arranged on the inner side of the pull rod 302c, the tension spring 302e is used to reset the arc-shaped extruding block 302d, the elastic coefficient of the tension spring 302e is greater than that of the compression spring 301c, so that when sliding into the third slot 302b, the arc-shaped extruding block 302d is extruded to drive the limiting block 301d to slide downward, and after electroplating contact, the limiting of the installation pipe 202a can be released, the wedge-shaped block 201b can be pulled again to move, so that the installation pipe 202a slides downward to drive the special-shaped clamping block 202c to rotate reversely, thereby canceling the clamping state of the turbine bearing bush and preparing for clamping electroplating of the next turbine bearing bush.

[0046] Specifically, the extruding member 302 further comprises a pull ring 302f arranged on one side of the pull rod 302c, which can facilitate quick pulling of the pull rod 302c.

[0047] In use: when the plating is completed and the turbine bearing body 101a needs to be released, pull the pull rod 302c, when the part installed with the arc-shaped extrusion block 302d slides to the third notch 302b, the arc-shaped clamping block extrusion sliding block 301b is driven to slide downward by the rebound of the tension spring 302e, thereby driving the limiting block 301d to slide downward and slide into the mounting groove 301a, the height of the pull rod 302c is lower than half the height of the third notch 302b, so that the third notch 302b will not be stuck by the pull rod 302c when the limiting block 301d moves downward, and the downward sliding can be carried out, the limiting of the mounting block is released, then the slide column 201a is pulled, the mounting pipe 202a is driven to slide downward, thereby driving the special-shaped clamping block 202c to rotate reversely, canceling the clamping state of the turbine bearing, and thus preparing for the clamping plating of the next turbine bearing body 101a, the extrusion piece 302 further includes a pull ring 302f arranged on one side of the pull rod 302c, and the pull ring 302f can facilitate quick pulling of the pull rod 302c.

[0048] The rest of the structure is the same as that of example 2.

[0049] Importantly, it should be noted that the constructions and arrangements of the present application shown in the various exemplary embodiments are by way of illustration only. Although only a few embodiments have been described in detail in this disclosure, those skilled in the art who review this disclosure will readily understand that many modifications can be made to the embodiments without materially departing from the novel teachings and advantages described in this application (e.g., variations in sizes, dimensions, structures, shapes and proportions of the various elements, values of parameters, mounting arrangements, use of materials, colors, orientations, etc.). For example, elements shown as integrally formed can be constructed of multiple parts or elements, the position of elements can be reversed or otherwise varied, and the nature or number of elements or positions can be altered or varied. Accordingly, all such variations are intended to be included within the scope of the present application. The order or sequence of any process or method steps can be changed, or reordered, according to alternative embodiments. Any "means plus function" clauses are intended to cover the structures described herein as performing the recited functions and not only structural equivalents but also equivalent structures. Other substitutions, modifications, changes, and omissions can be made in the design, operating conditions, and arrangement of the exemplary embodiments without departing from the scope of the present application. Accordingly, the present application is not limited to particular embodiments, but extends to various modifications that nevertheless fall within the scope of the appended claims.

[0050] Furthermore, in an effort to provide a concise description of exemplary embodiments, all features of an actual implementation can not be described (i.e., those unrelated to the best mode of practicing the present application, or those unrelated to enabling the claimed application).

[0051] It should be noted that the above examples are only used to illustrate the technical solutions of the present application but not limit the present application. Although the present application is described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or equivalently replaced, without departing from the spirit and scope of the technical solutions of the present application, which should be covered in the scope of the claims of the present application.

Claims

1. A fixture for preventing electro-corrosion of turbine bearings using nano-coating technology, characterized in that: include, The structural component (100) includes a structural member (101) and a mounting member (102), the mounting member (102) being disposed on the upper side of the structural member (101); The clamping assembly (200) includes a movable member (201) disposed in the structure (101), a clamping member (202) disposed in the mounting member (102), and a resetting member (203) disposed in the mounting member (102). The limiting component (300) includes a limiting member (301) and a pressing member (302), the limiting member (301) and the pressing member (302) being disposed within the moving member (201); The structural component (101) includes a turbine bearing body (101a) and an annular protrusion (101b) inside it. The mounting component (102) includes a mounting sleeve (102a) disposed on the upper side of the structural component (101) and a rotating shaft (102b) rotatably disposed inside the mounting sleeve. The clamping member (202) includes a mounting tube (202a) slidably disposed in the structural member (101) and the mounting member (102), a mounting platform (202b) disposed on the inner wall of the mounting tube (202a), a shaped clamping block (202c) rotatably disposed on the outside of the rotating shaft (102b), and a first slot (202d) opened on one side of the mounting tube (202a). One end of the shaped clamping block (202c) is connected to the mounting platform (202b), and the other end extends out of the first slot (202d) and contacts the annular protrusion (101b). The movable component (201) includes a sliding column (201a) slidably disposed in the through groove (101d) and a wedge block (201b) disposed on one side of the sliding column (201a). The movable component (201) includes a pull plate (201c) disposed on one side of the slide column (201a).

2. The fixture for preventing electric corrosion of a bearing bush of a steam turbine by nano-plating technology according to claim 1, wherein: The structural component (101) includes a fixing block (101c) and a through groove (101d) formed on the side wall of the fixing block (101c). The mounting component (102) also includes a recess (102c) formed inside the mounting sleeve (102a). The other end extends out of the first groove (202d) and the recess (102c) and contacts the annular protrusion (101b).

3. The fixture for preventing electric corrosion of a bearing bush of a steam turbine by nano-plating technology according to claim 2, wherein: The clamping member (202) further includes a second slot (202e) formed on the side wall of the mounting tube (202a), the second slot (202e) fitting into the inclined portion of the wedge block (201b).

4. The fixture for preventing electric corrosion of a bearing bush of a steam turbine by nano-plating technology according to claim 3, wherein: The reset component (203) includes a reset spring (203a) disposed on the upper side of the mounting tube (202a) and a fixing plate (203b) disposed on the upper side of the mounting sleeve (102a). The two sides of the reset spring (203a) are respectively connected to the inner wall of the mounting tube (202a) and the side wall of the fixing plate (203b).

5. The fixture for preventing electric corrosion of a bearing bush of a steam turbine by nano-plating technology according to claim 4, wherein: The limiting piece (301) comprises a mounting groove (301a) opened on the upper side of the inclined surface of the wedge-shaped block (201b) and a sliding block (301b) slidingly arranged in the mounting groove (301a), and further comprises a compression spring (301c) arranged on the inner side of the mounting groove (301a) and a limiting block (301d) arranged on the upper side of the sliding block (301b), and the inclined surface part of the limiting block (301d) is matched with the second notch (202e).

6. The fixture for preventing electric corrosion of a turbine bearing bushing using nanocoating technology according to claim 5, wherein: The limiting piece (301) further comprises a limiting plate (301e) arranged on one side of the wedge-shaped block (201b).

7. The fixture for preventing electric corrosion of a turbine bearing bushing using nanocoating technology according to claim 6, wherein: The extruding piece (302) comprises a sliding groove (302a) arranged on one side of the sliding column (201a), a third notch (302b) arranged on one side of the sliding block (301b) and a pull rod (302c) slidingly arranged in the sliding groove (302a), the pull rod (302c) penetrates through the third notch (302b) and is in sliding connection with the third notch (302b), and the height of the pull rod (302c) is lower than half of the height of the third notch (302b).

8. The fixture for preventing electric corrosion of a bearing bush of a steam turbine by nano-plating technology according to claim 7, wherein: The extruding piece (302) further comprises an arc-shaped extruding block (302d) slidingly arranged on one side of the pull rod (302c) and a tension spring (302e) arranged on the inner side of the pull rod (302c), and the elastic coefficient of the tension spring (302e) is greater than the elastic coefficient of the compression spring (301c).

9. The fixture for preventing electric corrosion of a turbine bearing bushing using nanocoating technology according to claim 8, wherein: The extruding piece (302) further comprises a pull ring (302f) arranged on one side of the pull rod (302c).

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