Turbine bearing bush maintenance tool

Abstract

The utility model provides a steam turbine bearing bush maintenance tool which comprises a miniature gantry crane body, a portal frame of the miniature gantry crane body comprises two symmetrically-arranged supporting columns, the opposite faces of the two supporting columns are connected with adjusting columns in a sliding mode in the vertical direction, and the outer side walls of the adjusting columns are connected with adjusting frames in a sliding mode. At least one group of guide components are arranged on the outer side wall of the adjusting frame, each group of guide components comprises mounting plates which are symmetrically arranged on the outer side wall of the adjusting frame, a transmission rod is rotationally connected between the two mounting plates through a bearing, and a guide wheel is arranged on the outer side wall of the transmission rod. Rolling friction reduces resistance, inhibits swing of the lifting hook, prevents a bearing bush from colliding with precise parts, reduces alloy falling and part deformation risks, reduces impact load of a crane, and prevents hidden danger of overturning.

Description

Technical Field

[0001] This utility model relates to the field of bearing maintenance technology, specifically to a steam turbine bearing maintenance tool. Background Technology

[0002] Steam turbine bearings are typically large in size and heavy in weight. During dismantling, hoisting, and adjustment, they require the assistance of workshop cranes. However, due to design limitations of the exhaust cylinder in some units, the construction space in the rear bearing area of ​​the steam turbine is narrow and cramped, making the dismantling, installation, adjustment, and other maintenance operations of the bearings in this area extremely difficult. This not only consumes a lot of manpower and resources but also seriously affects maintenance efficiency and quality.

[0003] In existing technologies, miniature gantry cranes are often used in maintenance scenarios such as bearing disassembly and cleaning, defect repair, delamination or crack treatment; by using its lifting function to lift and maintain bearings, it can reduce the workload of maintenance, reduce the difficulty of operation, improve the accuracy of maintenance, and avoid the risk of mechanical injury to personnel, thus taking into account both operational safety and efficiency improvement.

[0004] However, the chain lifting device used with miniature gantry cranes has inherent defects in the process of lifting turbine bearings: due to the large weight of the turbine bearings, whether it is lifting and dismantling or lowering and installing, the chain is prone to significant swaying under inertia. The large load weight further aggravates the swaying amplitude, which may cause the bearing body to collide with surrounding components (the swaying bearing is prone to collide with precision components such as the inner wall of the exhaust cylinder and the bearing seat in a confined construction space, causing the alloy layer of the bearing to fall off or causing deformation of the internal parts of the exhaust cylinder). In addition, the lifting device and lifting equipment are prone to abnormal load (the inertial force generated by the swaying will generate impact load on the steel structure of the chain lifting device and the miniature gantry crane, which may seriously lead to the risk of overall overturning). Utility Model Content

[0005] In view of this, the present invention provides a turbine bearing maintenance tool that can guide the component through a V-groove and a chain for multi-stage limiting, reduce resistance through rolling friction, suppress hook swing, prevent the bearing from colliding with precision components, reduce the risk of alloy detachment and component deformation, reduce the impact load on the crane, and prevent overturning hazards.

[0006] To solve the above-mentioned technical problems, this utility model provides a turbine bearing maintenance tool, including a miniature gantry crane body. The miniature gantry crane body includes two symmetrically arranged support columns. An adjusting column is slidably connected to the facing surfaces of the two support columns in the vertical direction. The adjusting column is designed as a hollow structure to reduce the overall weight and the amount of labor required for workers to lift the adjusting column. A slider is fixedly connected to both ends of the adjusting column. A sliding groove is opened on the facing surfaces of the two support columns. The slider and the sliding groove are adapted to each other, and the cross-section of the slider and the sliding groove is designed as a T-shaped structure. The adjusting column is slidably connected in the corresponding sliding groove through the sliders connected at both ends.

[0007] An adjustment frame is slidably connected to the outer wall of the adjustment column. The cross-section of the adjustment frame is set as a rectangular structure, and the adjustment frame is slidably connected to the adjustment column along the axial direction of the adjustment column.

[0008] Guide components are provided on the vertical outer wall and top of the adjustment frame. Each set of guide components includes mounting plates symmetrically connected to the outer wall of the adjustment frame. A transmission rod is rotatably connected between the two mounting plates via a bearing. A guide wheel is fixedly connected to the outer wall of the transmission rod.

[0009] A positioning screw is threadedly connected to one vertical surface of the adjustment frame, and a knob is fixedly connected to the end of the positioning screw away from the adjustment frame.

[0010] A positioning groove is provided on the arc-shaped outer wall of the guide wheel. The two side walls of the positioning groove are inclined towards the center of the guide wheel to form a V-shaped cross section. That is, the symmetrical inclined surface of the positioning groove is inclined in a converging manner from the groove opening to the groove bottom.

[0011] The guide wheel's positioning groove is wrapped with an elastic buffer layer, which is made of rubber.

[0012] The beneficial effects of the above-mentioned technical solution of this utility model are as follows:

[0013] 1. Effectively suppresses hoisting sway and improves operational safety: The guide components on the adjusting frame utilize the contact constraint between the V-shaped positioning groove and the chain to form multi-level guide limits. The rolling friction design of the guide wheels reduces resistance while significantly suppressing the lateral sway of the chain and hook, preventing the bearing bush from colliding with the inner wall of the exhaust cylinder, bearing housing, and other precision components in confined spaces. This reduces the risk of alloy layer peeling or component deformation, while also reducing impact loads on the crane structure and preventing overturning hazards.

[0014] 2. Adaptive adjustment and precise positioning: The adjustment column and support column cooperate through the T-shaped slider groove to achieve stable guidance for height adjustment; the adjustment frame slides laterally along the adjustment column, and with the locking function of the positioning screw, the guide wheel can be quickly aligned with the chain force point to ensure precise constraint position. The hollow structure design of the adjustment column reduces the overall weight, reduces the labor intensity of manual adjustment, and improves the convenience of operation.

[0015] 3. Double protection extends equipment life: The rubber elastic buffer layer embedded in the V-shaped positioning groove of the guide wheel reduces chain wear through flexible contact and buffers the instantaneous impact force during hoisting, protecting the integrity of the chain and guide wheel surface; the inclined top guide wheel counteracts chain sagging through force component, further reducing the swing amplitude and improving the stability of the hoisting process.

[0016] 4. Balancing compatibility and economy: The modular structure design supports flexible replacement of sliders and linear slides, which can adapt to the automation needs of frequent operation scenarios and meet the low-cost transformation needs of small factories, thus expanding the application scenarios. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the adjusting column and its components according to the present invention.

[0019] Figure 3 This is a schematic diagram of the guide component structure of this utility model;

[0020] Figure 4 This is a schematic diagram of the other side of the guide component of this utility model.

[0021] In the diagram: 101, Miniature gantry crane body; 102, Support column;

[0022] 201. Slide rail; 202. Slider; 203. Adjusting column; 204. Adjusting frame;

[0023] 301. Mounting plate; 302. Guide wheel; 303. Positioning groove;

[0024] 401. Positioning screw; 402. Knob. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the following will be described in conjunction with the accompanying drawings of the embodiments of this utility model. Figure 1-4 The technical solutions of the embodiments of this utility model are clearly and completely described herein. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the described embodiments of this utility model are within the protection scope of this utility model.

[0026] A tool for overhauling steam turbine bearings, such as Figure 1 , 2As shown: The miniature gantry crane includes a main body 101, and two symmetrically arranged support columns 102. An adjusting column 203 is slidably connected to the facing surfaces of the two support columns 102 in the vertical direction. The adjusting column 203 is designed as a hollow structure to reduce the overall weight and the amount of labor required for workers to lift the adjusting column 203. This also prevents workers from becoming overly fatigued when the chains on the gantry crane body are raised or lowered, as they need to lift the adjusting column 203 to a suitable position.

[0027] Both ends of the adjusting column 203 are fixedly connected to sliders 202. Slide grooves 201 are opened on the facing surfaces of the two support columns 102. The sliders 202 and slide grooves 201 are adapted to each other. The adjusting column 203 is slidably connected to the corresponding slide grooves 201 through the sliders 202 connected at both ends. This guides the two ends of the support column 102 when it is adjusted up and down. The surfaces of the sliders 202 and the slide grooves 201 are made of smooth material, which reduces the friction during sliding, further increases the sliding speed, and reduces the difficulty of adjustment. The cross-sections of the sliders 202 and the slide grooves 201 are both set as T-shaped structures, which can prevent the sliders 202 from falling out of the slide grooves 201 or deviating, thereby improving the stability of the adjusting column 203 when it is adjusted up and down in the vertical direction.

[0028] Furthermore, the structure in which the adjusting column 203 is slidably connected to the support column 102 can be replaced by a linear slide table, which is suitable for small and medium-sized factories with frequent operations. It can avoid the use caused by manual operation and reduce the amount of manual labor. The structure of slider 202 and slide 201 is suitable for micro-factories and saves costs.

[0029] like Figure 1 , 2 As shown in Figure 3: An adjusting frame 204 is slidably connected to the outer wall of the adjusting column 203, so that the adjusting frame 204 can be adjusted on the adjusting column 203. The cross-section of the adjusting frame 204 is set as a rectangular structure, so that the adjusting frame 204 will not rotate or tilt during adjustment. The adjusting frame 204 is set as a hollow cuboid structure, which is convenient for manufacturing. The adjusting frame 204 is slidably connected to the adjusting column 203 along the axial direction of the adjusting column 203, so that the position of the adjusting frame 204 can be adjusted according to the position of the hook and chain that need to be adjusted laterally, so that the position of the adjusting frame 204 can be adjusted to be on the same vertical line as the chain and hook.

[0030] like Figure 2 , 3As shown: At least one set of guide components is provided on the outer wall of the adjusting frame 204. Each set of guide components includes mounting plates 301 symmetrically arranged on the outer wall of the adjusting frame 204. A transmission rod is rotatably connected between the two mounting plates 301 through a bearing. A guide wheel 302 is fixedly connected to the outer wall of the transmission rod. After the guide wheel 302 moves to a suitable position on the adjusting column 203 along with the adjusting frame 204, its wheel surface contacts and forms a constraint with the middle part of the chain (or a specific force-bearing position, depending on the different parts of the miniature gantry crane used). Through the lateral limiting effect on the chain, the swaying of the hook in the lifting turbine bearing is effectively suppressed. That is, by adjusting the wheel surface of the guide wheel 302 and its height, the wheel surface of the guide wheel 302 is made to abut against or near the lower end of the chain, forming a contact force to limit the lateral swing of the chain.

[0031] Meanwhile, the rotating guide wheel 302 makes the contact between the wheel surface and the chain a rolling friction, which is much less than the sliding friction. This can effectively constrain the chain without affecting the normal lifting and lowering of the chain with the hook, achieving a precise guiding and positioning effect of "constraint without jamming".

[0032] Furthermore, in this embodiment, guide components are provided on both the vertical outer wall and the top of the adjustment frame 204. The mounting plate 301 of the top guide component is inclined, and the inclination angle between the mounting plate 301 and the adjustment frame 204 is set to 30°-60°, so that the top guide component can achieve the first contact constraint on the chain (that is, when the chain is subjected to vertical tension, the inclined guide wheel 302 applies horizontal and vertical components to the chain. The horizontal component limits the lateral displacement of the chain, and the vertical component can offset part of the chain's automatic or load-bearing sag, avoiding the chain from swinging due to slack). The guide component on the vertical side wall achieves the second contact constraint on the chain (that is, the guide wheel 302 forms a counter-constraint again, further improving the anti-sway effect on the chain and hook).

[0033] like Figure 3 As shown: A positioning screw 401 is threadedly connected to one vertical surface of the adjusting frame 204. By rotating the positioning screw 401, the adjusting frame 204 can be fixed to the adjusting column 203, which prevents the adjusting frame 204 from swaying laterally when constraining the chain, and further improves the stability of the chain and hook constraint. A knob 402 is fixedly connected to the end of the positioning bolt away from the adjusting frame 204, which can facilitate the rotation of the positioning bolt and improve the adjustment speed.

[0034] like Figure 3 , 4As shown: A positioning groove 303 is provided on the arc-shaped outer wall of the guide wheel 302. The two side walls of the positioning groove 303 are inclined towards the center of the guide wheel 302 to form a V-shaped cross section. That is, the symmetrical inclined surface of the positioning groove 303 is inclined in a converging manner from the groove opening to the groove bottom. When guiding the chain, the chain can be prevented from swaying by contact constraint force, and the chain can be limited to lateral displacement by the positioning groove 303, which further improves the stability of preventing swaying.

[0035] An elastic buffer layer is wrapped inside the positioning groove 303 of the guide wheel 302. The elastic buffer layer is made of rubber. The rubber material can protect the chain and prevent the chain from being damaged by continuous friction with the guide wheel 302.

[0036] When it is necessary to lift and repair the turbine bearing using the miniature gantry crane body 101, the chain and hook of the miniature gantry crane body 101 are lowered, and the hook is scraped onto the pre-installed hanging ring (or other parts for connecting the hook) on the turbine bearing. At this time, the adjusting column 203 is raised (if a linear slide is used, the two sets of linear slides are controlled to move synchronously). The adjusting frame 204 on the adjusting column 203 and the guide components connected to it will move accordingly. When it is raised to a suitable position, the adjusting frame 204 is adjusted laterally so that the center of the guide wheel 302 is aligned with the chain. At this time, the chain can be pushed out to form a contact constraint. At this time, the chain can be prevented from swaying when lifting the bearing.

[0037] Furthermore, it should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0038] The above description is the preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

Claims

1. A turbine bearing bushing repair tool comprising a micro gantry crane body (101), the gantry of the micro gantry crane body (101) comprising two symmetrically arranged support columns (102), characterized in that: An adjusting column (203) is slidably connected in the vertical direction on the opposing surfaces of the two supporting columns (102), and an adjusting frame (204) is slidably connected on the outer side wall of the adjusting column (203); At least one set of guide components is provided on the outer side wall of the adjustment frame (204). Each set of guide components includes mounting plates (301) symmetrically arranged on the outer side wall of the adjustment frame (204). A transmission rod is rotatably connected between two mounting plates (301) through a bearing. A guide wheel (302) is provided on the outer side wall of the transmission rod.

2. The steam turbine bushing repair tool of claim 1, wherein: The vertical outer wall and top of the adjustment frame (204) are provided with guide components, and the mounting plate (301) of the guide component at the top is inclined.

3. The steam turbine bushing repair tool of claim 1, wherein: The guide wheel (302) has a positioning groove (303) on its arc-shaped outer wall, and the two side walls of the positioning groove (303) are inclined toward the center of the guide wheel (302) to form a V-shaped cross section.

4. The steam turbine bushing repair tool of claim 2, wherein: A positioning screw (401) is threadedly connected to one vertical surface of the adjustment frame (204), and a knob (402) is provided at the end of the positioning screw (401) away from the adjustment frame (204).

5. The steam turbine bushing repair tool of claim 1, wherein: Both ends of the adjusting column (203) are provided with sliders (202), and both of the supporting columns (102) are provided with grooves (201). The adjusting column (203) is slidably connected to the corresponding grooves (201) by the sliders (202) at both ends.

6. A steam turbine bushing repair tool as claimed in claim 5, wherein: The adjusting column (203) is designed as a hollow structure to reduce the overall weight.

7. The steam turbine bushing repair tool of claim 3, wherein: An elastic buffer layer is provided in the positioning groove (303) of the guide wheel (302), and the elastic buffer layer is made of rubber.

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