Internal and external stator installation structure and method applicable to distributed synchronous condensers

Abstract

The present invention relates to an inner and outer stator installation structure and method suitable for distributed phase regulators, and belongs to the technical field of new energy power generation equipment. The installation structure of the inner and outer stators is a C-shaped frame structure, including a horizontal beam parallel to the horizontal plane, a column perpendicular to the horizontal plane, and a base parallel to the horizontal beam, which are connected in sequence; a concave and convex stopper is provided between the beam and the column; a concave and convex stopper is provided between the column and the base; a position-adjustable support plate is provided on the upper surface of the beam; and an axial positioning mechanism is provided on the column below the beam. The present invention improves the reliability of the structure by adopting a mechanical structure as the main force-bearing structure and a weld structure as an auxiliary force-bearing installation structure to meet high-frequency and high-load operations; by adopting a movable bearing surface, the requirements of the bearing position for different machine models and sizes are met, thereby improving the versatility of the equipment; by adopting an axial positioning mechanism, the technical problem of difficult axial precise positioning during the installation of the inner and outer stators is solved.

Description

Technical Field

[0001] The present invention relates to an inner and outer stator installation structure and method applicable to a distributed phase regulator, belonging to the technical field of new energy power generation equipment. Background Art

[0002] The assembly of inner and outer stators is the largest assembly operation in the manufacturing process of power generation equipment. After the inner and outer stators are completed at different stations, they need to be installed into one piece. Figure 1 As shown. This assembly operation not only has high load-bearing requirements, but also high positioning requirements. Therefore, a safe, reliable, and precisely controlled installation structure and method are required. Based on the characteristics of the internal and external stator structures of the power generation equipment, the internal and external stators can be installed in two forms: horizontal installation and vertical installation. Distributed phase condensers are suitable for horizontal installation. As for the horizontal installation form, based on the weight distribution of the internal and external stators of the power generation equipment, there are two installation forms: the inner stator is installed under static load and the outer stator is installed under static load, or the outer stator is installed under static load and the inner stator is installed under static load. That is, the principle is to use heavier components as static load-bearing parties and lighter components as dynamic load-bearing parties. Since the main weight of the distributed phase condenser is on the inner stator, it was determined that the distributed phase condenser adopts the horizontal installation form of the outer stator installed under static load and the inner stator is installed under static load.

[0003] Distributed phase regulators have four characteristics: 1) sophisticated structure; 2) a wide variety of models; 3) high demand; 4) short manufacturing cycle. Distributed phase regulators are divided into 10Mvar, 20Mvar, 30Mvar, 40Mvar, 50Mvar, etc. according to power. They are all small power generation equipment, so the manufacturing cycle is short. In addition, their structure is sophisticated and the assembly dimensional accuracy requirements are high. Therefore, if the distributed phase regulator adopts the traditional horizontal installation structure, there will be the following three problems: 1) The traditional horizontal installation structure adopts a pure welding structure. According to regulations, after using two units, the welds of key parts must be inspected for flaws, such as Figure 2As shown. After actual operation, welds are prone to cracking, requiring frequent repairs and re-inspections before they can be put into use, severely impacting production schedules. 2) Limited versatility. The traditional structure's inner stator support is fixed, restricting its placement and limiting the structure's versatility. 3) Difficulty locating the axial position. Traditional structures, primarily used for medium- and large-scale generators, rely on axial jogging of a crane for position adjustment, or even on multiple people pulling and pulling. This is laborious and imprecise. However, for small power generation equipment such as distributed phase-shifting condensers, the assembly clearance between the inner and outer stators is even smaller. The axial jogging of the crane far exceeds the required clearance, making it impossible to precisely position the inner and outer stators. Therefore, there is an urgent need in this technical field for an inner and outer stator mounting structure with an axial positioning mechanism that is highly reliable, capable of high-frequency and high-load operations, and able to meet the load-bearing position requirements of different machine sizes. This is to address the bottlenecks encountered in the existing installation process of inner and outer stators for distributed phase-shifting condensers. Summary of the Invention

[0004] The purpose of the present invention is to solve the technical problem of how to obtain an inner and outer stator mounting structure with an axial positioning mechanism that has high reliability, can meet high-frequency and high-load operations, and can meet the load-bearing position requirements of different machine models and sizes.

[0005] In order to achieve the purpose of solving the above-mentioned problems, the technical solution adopted by the present invention is to provide an inner and outer stator mounting structure suitable for a distributed phase regulator. The mounting structure is a C-frame structure, which includes a crossbeam parallel to the horizontal plane, a column perpendicular to the horizontal plane and a base parallel to the crossbeam connected in sequence; a concave and convex stop is provided between the crossbeam and the column; a concave and convex stop is provided between the column and the base; a position-adjustable support plate is provided on the upper surface of the crossbeam; and an axial positioning mechanism is provided on the column below the crossbeam.

[0006] Preferably, the adjustable support plate includes an arc-shaped pad and a movable support plate; a movable support plate with adjustable horizontal position is provided on the upper surface of the beam; and an arc-shaped pad for supporting the inner stator is provided on the movable support plate.

[0007] Preferably, an adjustment pad for adjusting the height is provided on the upper surface of the beam away from the column, and a tightening screw is provided between the adjustment pad and the beam; and a second arc-shaped pad for supporting the inner stator is provided on the adjustment pad.

[0008] Preferably, the axial positioning mechanism includes a bracket, an adjustment block and a hydraulic jack; a bracket is provided on the side of the column below the crossbeam, and a hydraulic jack is provided on the bracket and is parallel to the direction of the crossbeam and is ejected in the direction of the C-frame opening; an adjustment block is provided between the hydraulic jack and the column for extending the ejection distance of the hydraulic jack.

[0009] The present invention provides a method for using an inner and outer stator mounting structure applicable to a distributed phase regulator, comprising the following steps:

[0010] Step 1: First, place the inner stator on the two arc-shaped pads on the C-frame, and theoretically, the middle part of the inner stator is in the middle of the two arc-shaped pads;

[0011] Step 2: Using the side end face of the C-frame column as a reference, record the relative position of the inner stator and the reference, thereby deriving the relative position of the outer stator and the reference.

[0012] Step 3: Install the axial positioning mechanism on the C-frame column;

[0013] Step 4: Use the crane control to fit the outer stator onto the inner stator, and axially lift the outer stator to a position beyond the set position of the inner stator;

[0014] Step 5: Use the hydraulic jack of the axial positioning mechanism to push the outer stator back to the set position in the axial direction; if the stroke of the hydraulic jack is insufficient, use its axial adjustment block to compensate for the axial stroke.

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

[0016] 1. The present invention adopts a mechanical structure as the main force-bearing structure and a weld structure as the auxiliary force-bearing installation structure, which greatly improves the reliability of the structure and meets the requirements for intact operation under high-frequency and high-load operations.

[0017] 2. The present invention adopts a movable bearing surface method to meet the bearing position requirements of different machine models and sizes, greatly improving the scope of equipment universality.

[0018] 3. The present invention solves the technical problem of difficult axial positioning during the installation of the inner and outer stators by adopting an axial positioning mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 Schematic diagram of the inner stator and outer stator of a distributed phase regulator;

[0020] Figure 2 This is a schematic diagram of the traditional horizontal installation structure of inner and outer stators;

[0021] Figure 3 This is a schematic diagram of the horizontal installation structure of the inner and outer stators of the present invention;

[0022] Figure 4 Schematic diagram of the "convex and concave stop fitting" of the C-frame crossbeam and column in the present invention;

[0023] Figure 5 Schematic diagram of the "convex and concave stop fitting" of the C-shaped frame column and the base in the present invention;

[0024] Figure 6 This is a schematic diagram of the adjusting pad at the end of the beam in the present invention;

[0025] Figure 7 This is a schematic diagram of the dynamic adjustment of the distance between two arc-shaped pads in the present invention;

[0026] Figure 8 Schematic diagram of the axial positioning mechanism in the present invention;

[0027] Figure 9 This is a schematic diagram of the horizontal installation structure of the inner and outer stators in the present invention.

[0028] Figure numerals: 1. C-frame; 1-1. Crossbeam; 1-2. Column; 1-3. Base; 2. Adjusting pad; 3. Tightening screw; 4. Arc pad; 5. Moving support plate; 6. Axial positioning mechanism; 6-1. Bracket; 6-2. Adjusting block; 6-3. Hydraulic jack. DETAILED DESCRIPTION

[0029] In order to make the present invention more clearly understood, preferred embodiments are described in detail below with reference to the accompanying drawings:

[0030] like Figures 3 to 9 As shown, the technical solution adopted by the present invention is to provide an inner and outer stator mounting structure suitable for a distributed phase regulator. The structure is a C-shaped frame 1, which includes a horizontal beam 1-1 parallel to the horizontal plane, a vertical column 1-2 perpendicular to the horizontal plane, and a base 1-3 parallel to the horizontal beam 1-1. A concave and convex stopper is provided between the horizontal beam 1-1 and the vertical column 1-2; a concave and convex stopper is provided between the vertical column 1-2 and the base 1-3. The upper surface of the horizontal beam 1-1 is provided with an adjustable support plate; the vertical column 1-2 below the horizontal beam 1-1 is provided with an axial positioning mechanism 6. The adjustable support plate includes an arc-shaped pad 1 and a movable support plate 5. The horizontal position of the movable support plate 5 is adjustable on the upper surface of the horizontal beam 1-1; the movable support plate 5 is provided with an arc-shaped pad 1 for supporting the inner stator. An adjustment pad 2 is installed on the upper surface of the crossbeam 1-1, away from the column 1-2. A support screw 3 is installed between the adjustment pad 2 and the crossbeam 1-1. The adjustment pad 2 is equipped with two arc-shaped pads for supporting the inner stator. The axial positioning mechanism 6 comprises a bracket 6-1, an adjustment block 6-2, and a hydraulic jack 6-3. Bracket 6-1 is installed on the side of the column 1-2 below the crossbeam 1-1. Bracket 6-1 is equipped with a hydraulic jack 6-3 that extends parallel to the crossbeam 1-1 and toward the opening of the C-frame 1. An adjustment block 6-2 is installed between the hydraulic jack 6-3 and the column 1-2 to extend the extension distance of the hydraulic jack 6-3.

[0031] The present invention provides a method for using an inner and outer stator mounting structure applicable to a distributed phase regulator, comprising the following steps:

[0032] Step 1: First, place the inner stator on the two arc-shaped pads 4 on the C-shaped frame 1, and theoretically, the middle part of the inner stator is located in the middle of the two arc-shaped pads 4;

[0033] Step 2: Using the side end surface of column 1-2 of C-frame 1 as a reference, record the relative position of the inner stator and the reference, thereby deriving the relative position of the outer stator and the reference;

[0034] Step 3: Install the axial positioning mechanism 6 on the column 1-2 of the C-frame 1;

[0035] Step 4: Use the crane control to fit the outer stator onto the inner stator, and axially lift the outer stator to a position beyond the set position of the inner stator;

[0036] Step 5: Use the hydraulic jack 6-3 of the axial positioning mechanism 6 to push the outer stator back to the set position in the axial direction; if the stroke of the hydraulic jack is insufficient, use its axial adjustment block 6-2 to compensate for the axial stroke.

[0037] The purpose of the present invention is to solve the problems of the traditional inner and outer stator horizontal installation structure having high maintenance frequency, limited versatility, and difficulty in accurately locating the axial position, which makes it unsuitable for distributed phase regulators.

[0038] In order to achieve the purpose of solving the above problems, the technical solution adopted by the present invention is to provide a new horizontal installation structure, including a C-frame 1, an adjustment pad 2, a tightening screw 3, an arc-shaped pad 4, a movable support plate 5, and an axial tightening mechanism 6. The C-frame 1 structure is composed of a crossbeam 1-1, a column 1-2, and a base 1-3. Figure 3 As shown, the end of the crossbeam 1-1 is provided with an assembly port and a tightening support, and the middle of the crossbeam 1-1 is provided with a movable connection port; the adjustment pad 2 is installed to the end of the crossbeam 1-1 of the C-frame 1 through the assembly port; the tightening screw 3 is installed to the end of the crossbeam 1-1 of the C-frame 1 through the tightening support, and tightens the adjustment pad 2; the movable support plate 5 is fixed to the middle connection port of the crossbeam 1-1; there are 2 arc-shaped pads 4, one is installed on the adjustment pad 2, and the other is installed on the movable support plate 5 in the middle of the crossbeam; the axial positioning mechanism 6 is installed on the column 1-2 of the C-frame 1. The crossbeam 1-1 and the column 1-2 of the C-frame 1 adopt the mechanical connection method of "convex and concave stop tight fit" as the main force-bearing method, and use circumferential welds as the auxiliary force-bearing method, as shown in FIG. Figure 4 shown.

[0039] The column 1-2 and the base 1-3 of the C-frame 1 adopt the mechanical connection method of "convex and concave stopper tight fit" as the main force-bearing method, and use the circumferential weld as the auxiliary force-bearing method, such as Figure 5 shown.

[0040] The adjusting pad 2 and the tightening screw 3 are installed at the end of the crossbeam 1-1 of the C-frame 1. The height of the adjusting pad 2 is adjustable. Figure 6 shown.

[0041] The movable support plate 5 is installed at the connection port in the middle of the crossbeam 1 - 1 of the C-shaped frame 1 .

[0042] One arc-shaped pad 4 is installed on the adjustment pad 2, and the other arc-shaped pad 4 is installed on the movable support plate 5. By adjusting the position of the movable support plate 5, the distance between the two arc-shaped pads 4 can be dynamically adjusted to meet the size requirements of power generation equipment of different specifications, such as Figure 7 shown.

[0043] The axial positioning mechanism 6 is installed on both sides of the C-frame 1 column 1-2, and is tightened by the hydraulic jack 6-3. It also has an axial adjustment function. When the hydraulic jack 6-3 stroke is insufficient, the axial stroke compensation is performed. Figure 8 shown.

[0044] The present invention also provides a method for horizontally installing and axially positioning inner and outer stators, comprising the following steps:

[0045] Step 1: First, place the inner stator on the two arc-shaped pads 4 on the C-frame 1. Theoretically, the middle of the inner stator should be exactly in the middle of the two arc-shaped pads 4. (A certain error is allowed in actual operation)

[0046] Step 2: Using the end face of the C-frame 1 column as a reference, record the relative position of the inner stator and the reference, thereby deriving the relative position of the outer stator and the reference.

[0047] Step 3: Install the axial positioning mechanism 6 on both sides of the C-frame 1.

[0048] Step 4: Use the crane control to lift the outer stator axially to a position beyond the set position.

[0049] Step 5: Start the hydraulic jack 6-3 of the axial positioning mechanism 6 to push the outer stator back to the set position in the axial direction; if the stroke of the hydraulic jack 6-3 is not enough, use its axial adjustment function to compensate for the axial stroke.

[0050] like Figure 1 As shown in the figure, the inner stator and outer stator structure of the distributed phase regulator need to be installed in the bore of the outer stator.

[0051] like Figure 3 As shown, the overall structure of the C-shaped frame 1 provided by the present invention includes a crossbeam 1-1, a column 1-2, and a base 1-3, which serves as the basic structure for horizontal installation. Figure 4 As shown, the structure is mainly composed of mechanical connection between beam 1-1 and column 1-2 and welding as a supplement, replacing the original pure welding structure. Figure 5 As shown, the structure of the column 1-2 and the base 1-3 is mainly mechanically connected and supplemented by welding, replacing the original pure welding structure.

[0052] like Figure 6 As shown, the height adjustment method of the arc-shaped pad 4 at the end position of the beam 1-1 is as follows: the height of the adjustment pad 2 is controlled by tightening the screw 3, thereby controlling the height position of the arc-shaped pad 4 at the end position of the beam.

[0053] like Figure 7 As shown, the axial adjustment method of the arc-shaped pad 4 at the middle position of the beam 1-1 provided by the present invention is as follows: by axially adjusting the position of the moving support plate 5 on the beam, the axial spacing between the two arc-shaped pads 4 is dynamically adjusted.

[0054] like Figure 8 As shown, the axial positioning mechanism 6 provided by the present invention is composed of a bracket 6-1, an adjustment block 6-2, and a hydraulic jack 6-3. If the stroke of the hydraulic jack 6-3 is insufficient, the adjustment block 6-2 can be used to compensate for the axial adjustment stroke.

[0055] The specific installation method of the present invention is as follows:

[0056] Step 1: Place the C-frame 1 at the installation station. Space for hanging the inner and outer stators must be reserved at the installation station.

[0057] Step 2: Install the adjustment pad 2, the tightening screw 3, the arc pad 4, the movable support plate 5, and the axial tightening mechanism 6 according to the corresponding positions of different models.

[0058] Step 3: Lift the inner stator and slowly insert it into the crossbeam 1-1 of the C-frame 1 in the axial direction, and make the inner stator close to the set position in the axial direction (a certain error is allowed), and reserve a certain gap in the radial direction.

[0059] Step 4: Slowly place the inner stator on the two arc-shaped pads 4 of the C-frame 1.

[0060] Step 5: Measure the deflection of the crossbeam 1 - 1 of the C-frame 1 under load, re-lift the inner stator, and adjust the height of the arc-shaped pad 4 at the end position to compensate for the deflection value of the crossbeam 1 - 1 under load.

[0061] Step 6: Place the inner stator on the two arc-shaped pads 4 of the C-frame 1 again to put the inner stator in a static load state.

[0062] Step 7: Lift the outer stator and slowly insert it into the inner stator in the axial direction, and make the outer stator exceed the set position in the axial direction, leaving a certain gap in the radial direction.

[0063] Step 8: Push the hydraulic jack 6-3 of the axial positioning mechanism 6 toward the end face of the outer stator, and push the outer stator back to the set position in the axial direction; if the stroke of the hydraulic jack 6-3 is insufficient, use its own axial adjustment block 6-2 to compensate for the axial stroke.

[0064] Step 9: With the end face of the outer stator against the jack, slowly adjust the radial height of the outer stator until the axial and radial positions of the inner and outer stators meet the set values.

[0065] Step 10: Once the outer stator is in place, secure it with a support frame or jack. At this point, the inner stator is supported on the C-frame, and the outer stator is supported on the support frame or jack, making the inner and outer stators independent of each other. Remove the crane load in this state, then proceed with tightening and welding the inner and outer stators together to form a single unit.

[0066] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form or substance. It should be pointed out that ordinary technicians in this technical field can make several improvements and supplements without departing from the present invention, and these improvements and supplements should also be regarded as the scope of protection of the present invention. Any equivalent changes, modifications and evolutions made by technicians familiar with this profession without departing from the spirit and scope of the present invention by using the technical content disclosed above are all equivalent embodiments of the present invention; at the same time, any equivalent changes, modifications and evolutions made to the above embodiments based on the essential technology of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A C-shaped stator mounting structure suitable for a distributed phase regulator, characterized in that: The C-shaped frame structure includes a crossbeam parallel to the horizontal plane, a column perpendicular to the horizontal plane and a base parallel to the crossbeam, which are connected in sequence; a concave and convex stopper is provided between the crossbeam and the column; a concave and convex stopper is provided between the column and the base; a position-adjustable support plate is provided on the upper surface of the crossbeam, and the adjustable support plate includes an arc-shaped pad and a movable support plate; a movable support plate whose horizontal position can be adjusted is provided on the upper surface of the crossbeam; an adjustment pad for adjusting the height is provided on the upper surface of the crossbeam away from the column, and a tightening screw is provided between the adjustment pad and the crossbeam; an arc-shaped pad 2 for supporting the inner stator is provided on the adjustment pad; an axial positioning mechanism is provided on the column below the crossbeam, and the axial positioning mechanism includes a bracket, an adjustment block and a hydraulic jack; a bracket is provided on the side of the column below the crossbeam, and a hydraulic jack is provided on the bracket, which is parallel to the direction of the crossbeam and ejected toward the opening direction of the C-shaped frame; an adjustment block for extending the ejection distance of the hydraulic jack is provided between the hydraulic jack and the column.

2. The method for using the inner and outer stator mounting structure for a distributed phase condenser according to claim 1, characterized in that: The steps include: Step 1: First, place the inner stator on the two arc-shaped pads on the C-frame, and theoretically, the middle part of the inner stator is in the middle of the two arc-shaped pads; Step 2: Using the side end face of the C-frame column as a reference, record the relative position of the inner stator and the reference, thereby deriving the relative position of the outer stator and the reference. Step 3: Install the axial positioning mechanism on the C-frame column; Step 4: Use the crane control to fit the outer stator onto the inner stator, and axially lift the outer stator to a position beyond the set position of the inner stator; Step 5: Use the hydraulic jack of the axial positioning mechanism to push the outer stator back to the set position in the axial direction; if the stroke of the hydraulic jack is insufficient, use its axial adjustment block to compensate for the axial stroke.

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