Generator stator lower tooth pressing plate mounting and positioning device

Abstract

A kind of generator stator lower tooth pressing plate installation positioning device, it includes horizontal positioning block, radial positioning block, C type clamping tool;The lower pressing plate of motor stator is divided into blocks, and the block lower pressing plate is positioned and fixed on the lower ring plate of stator frame according to design radius;The bottom of the pressing finger of block positioning is installed and fixed on the horizontal positioning block, and one end is installed and fixed on the radial positioning block, each pressing finger is accurately positioned by horizontal positioning block and radial positioning block and forms a block whole, the pressing finger of the block whole is placed on the lower pressing plate that has been installed and positioned, and the connecting part of pressing finger, block lower pressing plate and stator frame lower ring plate is fixed firmly using C type clamping tool.The installation device can well adapt to the deformation generated in the process of large-diameter stator frame machining and welding and in the process of transportation, leading to the increase of lower ring plate waviness and affecting the installation quality of lower tooth pressing plate, and can improve the installation quality precision control and improve construction efficiency.

Description

Technical fields:

[0001] This utility model belongs to the technical field of generator stator assembly device, specifically, it is a generator stator lower tooth pressure plate mounting and positioning device. Background technology:

[0002] The existing method of installing the lower stator tooth pressure plate involves adding pads, welding, and grinding to the lower pressure plate. However, this method has drawbacks such as poor process quality, high construction difficulty, and large resource investment. It also reduces the contact area between the lower pressure plate and the lower stator ring plate, which may lead to excessive stator vibration during operation. Therefore, it is urgent to design a generator stator lower tooth pressure plate installation device to solve the above problems. Utility model content:

[0003] This utility model provides a generator stator lower tooth pressure plate installation and positioning device to address the shortcomings of existing technology. It can effectively adapt to the deformation that occurs during the processing and welding of large-diameter stator frames and during transportation, which leads to increased waviness of the lower ring plate and affects the installation quality of the lower tooth pressure plate. It can also improve the precision control of installation quality and increase construction efficiency.

[0004] To achieve the above objectives, this utility model adopts the following technical solution:

[0005] This utility model provides a generator stator lower gear pressure plate mounting and positioning device. The mounting device includes a horizontal positioning block, a radial positioning block, bolts, and a C-type clamping tool. The lower pressure plate of the motor stator is divided into sections, and the divided lower pressure plates are positioned and fixedly installed on the lower ring plate of the stator frame according to the design radius. The bottom of the pressure finger after the section positioning is completed is installed and fixed on the horizontal positioning block, and one end of the pressure finger after the section positioning is completed is installed and fixed on the radial positioning block. The horizontal positioning block and the radial positioning block accurately position each pressure finger and form a section whole. The pressure finger of the section whole is placed on the installed and positioned lower pressure plate. The connection parts of the pressure finger, the section lower pressure plate, and the lower ring plate of the stator frame are temporarily and firmly fixed using a C-type clamping tool.

[0006] The segmented lower pressure plate is fixedly installed on the lower ring plate of the stator base by bolts.

[0007] The horizontal positioning block is made of precision-machined steel, and its thickness is determined according to the actual force.

[0008] The horizontal positioning block is arc-shaped, and its external dimensions are determined according to the radius R of the distribution circle of the screw holes at the bottom of the pressure finger. The horizontal positioning block is set with the first bolt hole of diameter Φ9 according to the distribution spacing of the pressure fingers. The pressure fingers and the horizontal positioning block are integrated into a whole by bolts. The bottom of each pressure finger is fixed to the horizontal positioning block with an M8 bolt, and the spacing of each pressure finger in this part is positioned and adjusted to be on the same horizontal plane.

[0009] The radial positioning block is made from a single piece of steel plate, and its thickness is determined according to the actual force applied.

[0010] The radial positioning block is arc-shaped, and its outer dimensions are determined according to the inner radius R of the pressure finger. The radial positioning block is equipped with a second bolt hole with a diameter of Φ9 according to the distribution spacing of the pressure fingers. The pressure fingers and the radial positioning block are integrated into a whole by bolts. Each pressure finger is fixed to the radial positioning block with one or two M8 bolts. The fan-shaped spacing of this part of the pressure fingers is positioned and adjusted to the same radius.

[0011] The installation device uses the area with the highest horizontal waviness of the lower pressure plate as the reference point, and the gap between the pressure finger and the lower pressure plate is filled with adjusting shims.

[0012] The number of C-type clamping tools is determined based on the number of lower pressure plates after segmentation, and is generally equipped at a ratio of 1:3.

[0013] The single C-type clamping tool includes a C-type fixed clamp, a movable pressure head, a pressure plate base, a hand lever, and a screw rod; the lower end of the opening side of the C-type fixed clamp is provided with a pressure plate base and the upper end is provided with a movable pressure head, the pressure plate base and the movable pressure head are set accordingly, the top of the movable pressure head is provided with a vertical screw rod, and the top of the screw rod is provided with a hand lever with a diameter of Φ12.

[0014] The connecting parts of the pressure finger, the segmented lower pressure plate, and the lower ring plate of the stator frame are placed in the C-shaped fixing clamp, the movable pressure head abuts against the corresponding pressure finger, and the pressure plate base is located at the bottom of the lower ring plate of the stator frame.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. This utility model can effectively position each pressure finger according to the designed spacing and horizontal uniformity.

[0017] 2. This utility model can more accurately adjust the height difference between the inner and outer circles of each pressure finger, the horizontal level, and the misalignment of adjacent pressure fingers, thereby improving installation accuracy.

[0018] 3. This utility model is not affected by the horizontal waviness of the lower ring plate during the pressure finger adjustment and installation process, and at the same time, the contact area between the lower pressure plate and the stator lower ring plate is increased.

[0019] 4. This utility model can avoid the need for the lower tooth pressure plate to be pre-assembled by adding pads and repeated grinding due to the large waviness of the lower ring plate of the stator base, thus improving work efficiency and saving construction time. Attached image description:

[0020] Figure 1 This is a planar assembly drawing of the present invention;

[0021] Figure 2 This is an assembly cross-sectional view of the present invention;

[0022] Figure 3 This is a schematic diagram of the structure of the horizontal positioning block of this utility model;

[0023] Figure 4 This is a schematic diagram of the radial positioning block of this utility model;

[0024] Figure 5 This is a structural schematic diagram of the C-type clamping tool of this utility model.

[0025] Figure reference numerals:

[0026] 1- Stator base lower ring plate, 2- Lower pressure plate, 3- Horizontal positioning block, 4- Radial positioning block, 5- Pressure finger, 6- Bolt, 7- C-type clamping tool, 8- C-type fixing clamp, 9- Movable pressure head, 10- Pressure plate base, 11- Hand rod, 12- Spiral rod, 13- First bolt hole, 14- Second bolt hole. Detailed implementation method:

[0027] The present invention will be further described below with reference to specific embodiments. These specific embodiments are further explanations of the principle of the present invention and are not intended to limit the present invention in any way. Any technology that is the same as or similar to the present invention does not exceed the protection scope of the present invention.

[0028] See Figures 1-5 This utility model provides a generator stator lower gear pressure plate mounting and positioning device, which includes a horizontal positioning block 3, a radial positioning block 4, a bolt 6, and a C-type clamping tool 7. The lower pressure plate 2 of the motor stator is set in sections, and the sectioned lower pressure plate 2 is positioned and installed on the lower ring plate 1 of the stator frame according to the design radius.

[0029] The bottom of the pressure finger 5, after being segmented and positioned, is fixed to the corresponding screw hole position of the horizontal positioning block 3 using fixing bolts 6. The horizontal positioning block 3 is made of precision-machined steel, and its plate thickness is determined according to the actual force to ensure a certain strength and prevent deformation. The horizontal positioning block 3 is arc-shaped, and its outer dimensions are determined according to the radius R of the distribution circle of the screw holes at the bottom of the pressure finger 5. The horizontal positioning block 3 is set with the first bolt hole 13 with a diameter of Φ9 according to the distribution spacing of the pressure finger 5. The pressure finger 5 and the horizontal positioning block 3 are integrated into a whole using bolts 6. The horizontal positioning block 3 is used for the installation spacing and horizontal adjustment of each pressure finger 5. Each pressure finger 5 is initially installed and fixed on the horizontal positioning block 3 according to the positioning screw holes of the horizontal positioning block 3. The bottom of each pressure finger 5 is fixed on the horizontal positioning block 3 with an M8 bolt 6. The spacing of each pressure finger 5 in this part is positioned and adjusted to be on the same horizontal plane.

[0030] One end of the pressure finger 5, after being segmented and positioned, is fixed to the corresponding screw hole position of the radial positioning block 4 using fixing bolts 6. The radial positioning block 4 is made of a single piece of steel plate, and its thickness is determined according to the actual force to ensure a certain strength and prevent deformation. The radial positioning block 4 is arc-shaped, and its outer dimensions are determined according to the inner radius R of the pressure finger 5. The radial positioning block 4 is equipped with second bolt holes 14 with a diameter of Φ9 according to the distribution spacing of the pressure fingers 5. The pressure fingers 5 and the radial positioning block 4 are integrated into a whole using fixing bolts 6. The radial positioning block 4 adjusts the fan-shaped opening, spacing, and radius R of the pressure fingers 5 to position and fix the spacing of the pressure fingers 5. Each pressure finger 5 is fixed to the radial positioning block 4 with one or two M8 fixing bolts 6, positioning and adjusting the fan-shaped spacing of this part of the pressure fingers 5 to the same radius.

[0031] Each pressure finger 5 is precisely positioned and formed into a segmented whole by using horizontal positioning block 3 and radial positioning block 4. The pressure finger 5 of this segmented whole is placed on the installed and positioned lower pressure plate 2. The area with the highest horizontal wave of the entire circle of the lower pressure plate 2 is used as the reference point. The gap between the pressure finger 5 and the lower pressure plate 2 is filled with adjusting shims to ensure that the adjusting shims and the pressure finger 5 are uniform. The connection parts of the pressure finger 5, the segmented lower pressure plate 2, and the lower ring plate 1 of the stator base are then temporarily and firmly fixed with C-type clamping tool 7. After being firmly fixed, each pressure finger 5 is segmented and welded firmly to the lower pressure plate 2 according to the design requirements.

[0032] The number of C-type clamping tools 7 is determined according to the distribution of the segmented lower pressure plates 2, and is generally equipped in a 1:3 ratio. Each C-type clamping tool 7 includes a C-type fixed clamp 8, a movable pressure head 9, a pressure plate base 10, a handle 11, and a screw rod 12. The lower end of the opening side of the C-type fixed clamp 8 is provided with a pressure plate base 10, and the upper end is provided with a movable pressure head 9. The pressure plate base 10 and the movable pressure head 9 are set accordingly. A vertical screw rod 12 is set on the top of the movable pressure head 9, and a handle 11 with a diameter of Φ12 is vertically set on the top of the screw rod 12. The connecting part of the pressure finger 5, the segmented lower pressure plate 2, and the lower ring plate 1 of the stator base is placed in the C-type fixed clamp 8, and the movable pressure head 9 abuts against the corresponding pressure finger 5. The pressure plate base 10 is located at the bottom of the lower ring plate 1 of the stator base. In this embodiment, since the installation and positioning device is designed with a length distance of 3 lower pressure plates 2, the number of C-type clamping tools 7 can be appropriately increased on site for fixing as needed.

[0033] The installation process of the lower pressure plate 2 of the stator using this mounting and positioning device is as follows:

[0034] Step 1: After the on-site assembly and welding of the segmented stator is completed, the horizontal waviness of the entire circle of the lower ring plate 1 of the stator base is measured at various points. The highest and lowest points of the entire circle are analyzed and calculated. According to the distribution, the high point abrupt change point is removed by grinding to reduce the horizontal waviness as much as possible. The weld position is generally controlled by a concavity of 0 to 1.5 mm. If an upward convex phenomenon occurs, it is necessary to grind it flat.

[0035] Step 2: Position the segmented lower pressure plate 2 according to the design radius and install it on the lower ring plate 1 of the stator base, and fix it firmly with bolts.

[0036] Step 3: Install and fix the first and last pressure fingers 5 using the horizontal positioning block 3, radial positioning block 4 and bolts 6, and place them on the lower pressure plate 2. Use the area with the highest horizontal undulation of the entire circle of the lower pressure plate 2 as the reference point, and temporarily fix it with a C-type clamping tool 7. Adjust the inner circle radius of the pressure fingers 5 to the design value using a circle measuring frame. Use a level to measure the height difference between the inner and outer circles of the pressure fingers 5. Adjust the level of the inner and outer circles of the pressure fingers 5 and the height difference of the pressure fingers 5 by adding adjusting shims between the pressure fingers 5 and the lower pressure plate 2. After the data measurement is qualified, the height difference of the pressure fingers 5 meets the design requirements. Then fix it firmly with a C-type clamping tool 7.

[0037] Step 4: Install the remaining pressure fingers 5, and fix them according to the positioning positions of the horizontal positioning block 3 and the radial positioning block 4, and tighten the bolts 6. Use a straightedge to check the flatness of the upper surface of the pressure fingers 5.

[0038] Step 5: Use adjusting shims to fill the gap between the pressure finger 5 and the lower pressure plate 2. During the filling process, ensure that the adjusting shims and pressure finger 5 are evenly distributed. Check that all gaps between the pressure finger 5 and the lower pressure plate 2 are filled with adjusting shims.

[0039] Step 6: Similarly, install the remaining pressure fingers 5 using the method described above.

[0040] Step 7: After retesting the level of the inner circle of pressure finger 5 and the height difference of pressure finger 5, and confirming that they are within acceptable limits, weld each pressure finger 5 securely in sections according to the design requirements. During welding, the gaskets should be sealed to prevent them from falling off during later operation. After welding, check the radius R of pressure finger 5, the horizontal waviness of the inner and outer circles, and the height difference of pressure finger 5 on all lower pressure plates 2.

[0041] Step 8: Remove the lower pressure plate 2 and perform a thorough cleaning. Perform a PT inspection on the welded parts. After completing the above work, reassemble.

Claims

1. A generator stator lower tooth pressure plate mounting and positioning device, characterized in that: The installation device includes a horizontal positioning block (3), a radial positioning block (4), bolts (6), and a C-type clamping tool (7). The lower pressure plate (2) of the motor stator is set in sections. The lower pressure plate (2) after being divided into sections is fixedly installed on the lower ring plate (1) of the stator frame according to the design radius. The bottom of the pressure finger (5) after the section positioning is completed is fixedly installed on the horizontal positioning block (3), and one end of the pressure finger (5) after the section positioning is completed is fixedly installed on the radial positioning block (4). The pressure fingers (5) are precisely positioned by the horizontal positioning block (3) and the radial positioning block (4) to form a section whole. The pressure fingers (5) of the section whole are placed on the lower pressure plate (2) that has been installed and positioned. The connection parts of the pressure fingers (5), the section lower pressure plate (2), and the lower ring plate (1) of the stator frame are firmly fixed by the C-type clamping tool (7).

2. The generator stator lower tooth pressure plate mounting and positioning device according to claim 1, characterized in that: The segmented lower pressure plate (2) is fixedly installed on the lower ring plate (1) of the stator base by bolts.

3. The generator stator lower tooth pressure plate mounting and positioning device according to claim 1, characterized in that: The horizontal positioning block (3) is made of steel through precision machining, and its thickness is determined according to the actual force.

4. The generator stator lower tooth pressure plate mounting and positioning device according to claim 1, characterized in that: The horizontal positioning block (3) is arc-shaped, and its external dimensions are determined according to the radius R of the distribution circle of the screw holes at the bottom of the pressure finger (5). The horizontal positioning block (3) is provided with the first bolt hole (13) with a diameter of Φ9 according to the distribution spacing of the pressure fingers (5). The pressure fingers (5) and the horizontal positioning block (3) are integrated into a whole by bolts (6). The bottom of each pressure finger (5) is fixed to the horizontal positioning block (3) with an M8 bolt (6). The spacing of each pressure finger (5) in this part is positioned and adjusted to be on the same horizontal plane.

5. The generator stator lower tooth pressure plate mounting and positioning device according to claim 1, characterized in that: The radial positioning block (4) is made from a single piece of steel plate, and its thickness is determined according to the actual force.

6. The generator stator lower tooth pressure plate mounting and positioning device according to claim 1, characterized in that: The radial positioning block (4) is arc-shaped, and its outer dimensions are determined according to the inner radius R of the pressure finger (5). The radial positioning block (4) is provided with second bolt holes (14) with a diameter of Φ9 according to the distribution spacing of the pressure fingers (5). The pressure fingers (5) and the radial positioning block (4) are integrated into a whole by bolts (6). Each pressure finger (5) is fixed on the radial positioning block (4) with one or two M8 bolts (6). The fan-shaped spacing of this part of the pressure fingers (5) is positioned and adjusted to the same radius.

7. The generator stator lower tooth pressure plate mounting and positioning device according to claim 1, characterized in that: The installation device uses the area with the highest horizontal wave of the lower pressure plate (2) as the reference point, and the gap between the pressure finger (5) and the lower pressure plate (2) is filled with adjusting shims.

8. The generator stator lower tooth pressure plate mounting and positioning device according to claim 1, characterized in that: The number of C-type clamping tools (7) is determined according to the number of the lower pressure plates (2) after the blocks are divided, and is generally equipped in a 1:3 ratio.

9. The generator stator lower tooth pressure plate mounting and positioning device according to claim 1, characterized in that: The single C-type clamping tool (7) includes a C-type fixed clamp (8), a movable pressure head (9), a pressure plate base (10), a handle (11), and a screw rod (12); the C-type fixed clamp (8) has a pressure plate base (10) at the lower end of the opening side and a movable pressure head (9) at the upper end. The pressure plate base (10) and the movable pressure head (9) are set accordingly. A vertical screw rod (12) is set on the top of the movable pressure head (9). A handle (11) is vertically set on the top of the screw rod (12). The handle (11) has a diameter of Φ12.

10. The generator stator lower tooth pressure plate mounting and positioning device according to claim 9, characterized in that: The connection points of the pressure finger (5), the segmented lower pressure plate (2), and the lower ring plate (1) of the stator frame are placed in the C-type fixing clamp (8), the movable pressure head (9) abuts against the corresponding pressure finger (5), and the pressure plate base (10) is located at the bottom of the lower ring plate (1) of the stator frame.

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