A method for improving the success rate of shrinkage between the sliding rotor and the sleeve of a pumped storage unit

Abstract

The present invention relates to the field of assembly and manufacturing, and in particular to a method for improving the success rate of shrink-fitting between a sliding rotor and a sleeve of a pumped storage unit; the method comprises: using an upper guide sleeve shrink-fitting tool to check whether the copper tape wrapping is qualified; when the copper tape wrapping is qualified, drawing a shrink-fitting alignment observation line along the axial direction of the upper guide sleeve; lowering the upper guide sleeve into the upper guide sliding rotor; the upper guide sleeve insulated lower edge enters the secondary step of the guide sliding rotor through the guidance of composite paper; if the upper plane of the upper guide sliding rotor does not reach the position line of the lower edge of the upper guide sleeve, the composite paper is pulled out, and the upper guide sliding rotor is lowered until the upper plane of the upper guide sleeve is flush with the upper plane of the upper guide sliding rotor, and the lowering is ended to complete the shrink-fitting; the advantages of the present invention are that it realizes the inspection of the direction and angle of the copper tape wrapping, assists the upper guide sleeve insulated lower edge to accurately enter the secondary step of the upper guide sliding rotor, and can ensure the technical effect of precise alignment during the shrink-fitting process during the lowering, thereby improving the success rate of the shrink-fitting between the upper guide sliding rotor and the upper guide sleeve.

Description

Technical Field

[0001] The invention relates to the field of assembly manufacturing, and in particular to a method for improving the success rate of shrinkage between a sliding rotor and a sleeve of a pumped storage unit. Background Art

[0002] A pumped storage station uses electricity from the grid during low load periods to pump water from the lower reservoir to the upper reservoir for storage. When the grid reaches peak load, the station releases the water back to the lower reservoir for power generation. This is also known as a storage hydropower station.

[0003] The upper guide rotor assembly on the pumped-storage unit in a pumped-storage station consists of an upper guide rotor, an upper guide sleeve, shaft insulation, and a copper strip. The shaft insulation is used to isolate the shaft current path, and the copper strip is set inside the insulation, dividing the shaft insulation into an inner and outer part, which is used to achieve online monitoring of the shaft insulation performance. To prevent relative sliding between the upper guide rotor and the upper guide sleeve during unit operation, an interference fit is adopted between the two, with a tightness of approximately 2mm. This assembly method has the largest tightness and the highest assembly difficulty among all hydropower projects.

[0004] In order to protect the shaft insulation, a secondary step for sealing insulation is opened on the inner circle side of the upper end of the upper guide sliding rotor; the entry of the upper guide sleeve insulation into the secondary step of the upper guide sliding rotor cannot be visually inspected and can only be scraped in by feeling using an insulating strip; however, with this assembly method, the depth to which the lower end of the upper guide sleeve insulation falls into the secondary step of the upper guide sliding rotor can only be determined based on experience. If it falls too deep, the lower end of the upper guide sleeve insulation will turn outward, causing the thermal insulation to fail; if the lower end of the upper guide sleeve insulation falls too shallowly into the secondary step of the upper guide sliding rotor, the insulation will wrinkle when it encounters the high temperature of the upper guide sliding rotor, causing the upper guide sleeve insulation to be exposed from the secondary step of the upper guide sliding rotor; based on the above reasons, it is very difficult for the lower end of the upper guide sleeve insulation to enter the secondary step of the upper guide sliding rotor, resulting in an extremely low success rate for thermal insulation of the upper guide sleeve of the pumped storage unit.

[0005] For example, a Chinese patent with application number 201920592056.9 and application date of April 26, 2019, is a utility model patent entitled "A tool for vertically lifting the cast aluminum rotor of an electric motor". Its technical solution is as follows: the tool includes a suspension rod, a sleeve, a thrust seat, and a hook pivotably hinged on the outer periphery of the sleeve; the sleeve can be axially slidably mounted outside the suspension rod; the thrust seat is fixedly connected to the bottom end of the suspension rod; from top to bottom, the thrust seat is provided with a thrust surface arranged outwardly and tilted, which is used to force the hook resting on it to swing outward around the hinge axis under the action of gravity. During the process of heat-shrinking the rotor, the tool can place the rotor vertically in the heating ring, avoiding the process of repeatedly laying the rotor horizontally and then standing it up, reducing the installation risk, making the lifting process safer and faster, and can be widely used in the field of motor assembly production.

[0006] The above patent uses a tooling that can vertically lift the cast aluminum rotor of the motor, so that the rotor can be placed vertically into the heating ring, reducing the risk of installation. However, the above patent does not fundamentally improve the success rate of shrink fitting. If there is an error in the direction angle of the copper tape wrapping, and the insulation of the upper guide sleeve enters the secondary step too deep or too shallow, the technical problem of shrink fitting failure will still exist. Summary of the Invention

[0007] In order to solve the problems existing in the above-mentioned prior art, the present invention provides a method for improving the success rate of heat-shrinking between the sliding rotor and the sleeve of a pumped storage unit, which can check the direction and angle of the copper belt wrapping and assist the upper guide sleeve to insulate and enter the secondary step of the upper guide sliding rotor.

[0008] In order to achieve the above technical effects, the technical solutions of this application are as follows:

[0009] A method for improving the success rate of shrinkage between a sliding rotor and a sleeve of a pumped storage unit comprises the following steps:

[0010] Step 1: Use the upper guide sleeve shrink fitting to check whether the copper tape wrapping direction and angle of the upper guide sleeve are qualified;

[0011] Step 2: When the direction and angle of the copper tape wrapping are qualified, take the copper ear of the upper guide sleeve as the starting point and draw a shrink sleeve alignment observation line along the axial direction of the upper guide sleeve; at the same time, draw the lower end position line of the upper guide sleeve insulation and the lower end position line of the upper guide sleeve at the lower end of the outer side of the upper guide sleeve insulation;

[0012] Step 3: Start lowering the upper guide sleeve into the upper guide rotor. During the lowering process, keep the shrink sleeve alignment observation line aligned with the upper guide rotor U-shaped groove on the upper plane of the upper guide rotor;

[0013] Step 4: When the upper guide sleeve moves to the point where the upper plane of the upper guide rotor is flush with the position line of the upper guide sleeve insulation lower edge, the upper guide sleeve insulation lower edge begins to enter the second step of the guide rotor under the guidance of the composite paper;

[0014] Step 5: When the upper guide sleeve moves to the upper plane of the upper guide rotor and exceeds the insulation lower edge position line of the upper guide sleeve, but the upper plane of the upper guide rotor does not reach the lower edge position line of the upper guide sleeve, pull out the composite paper and continue to lower it until the upper plane of the upper guide sleeve is flush with the upper plane of the upper guide rotor. Then, the lowering is completed and the shrink fitting is completed.

[0015] Furthermore, in the step one, the upper guide sleeve shrink fitting is a circular ring structure, with waist-shaped holes opened at equal intervals on the circumference of the ring, and a boss is provided on part of the ring at the waist-shaped holes in the opposite direction toward the center of the circle; in the step one, four sleeve single-piece lifting holes are opened on the ring of the upper guide sleeve at equal intervals in the circumferential direction; the inner wall of the upper guide sleeve is provided with a keyway running from the top ring to the bottom ring.

[0016] Furthermore, in step 1, the specific steps of using the upper guide sleeve shrink fitting tool to check whether the copper tape wrapping direction and angle of the upper guide sleeve are qualified are as follows:

[0017] Step a: Fix the waist-shaped hole on the upper guide sleeve shrink fitting and the sleeve single-piece lifting hole on the upper guide sleeve with bolts;

[0018] Step b: After the fixation is completed, observe the keyway and copper ear on the upper guide sleeve to see if they are aligned with the copper belt inspection scale set on the upper guide sleeve shrink fit tooling. If the keyway and copper ear are aligned with the copper belt inspection scale, the direction and angle of the copper belt are qualified; if the keyway, copper ear, or the keyway and copper ear are not aligned with the copper belt inspection scale, the direction and angle of the copper belt are unqualified.

[0019] Furthermore, the copper belt inspection scale pair includes a first scale pair for checking the copper belt wrapping direction and angle of the guide sleeve at a speed of 500r / min, a second scale pair for checking the copper belt wrapping direction and angle of the guide sleeve at a speed of 428.6r / min, and a third scale pair for checking the copper belt wrapping direction and angle of the guide sleeve at other speeds.

[0020] Furthermore, the first scale pair includes the first copper ear inspection scale and the first keyway inspection scale, the second scale pair includes the second copper ear inspection scale and the second keyway inspection scale, and the third scale pair includes the third copper ear inspection scale and the second keyway inspection scale; the first copper ear inspection scale, the second copper ear inspection scale, the first keyway inspection scale and the second keyway inspection scale are arranged between the first waist-shaped hole and the second waist-shaped hole of the upper guide sleeve heat-fitting tooling, and from one side of the first waist-shaped hole to the side of the adjacent second waist-shaped hole, they are distributed on the upper guide sleeve heat-fitting tooling in sequence as the second copper ear inspection scale, the first copper ear inspection scale, the second keyway inspection scale and the first keyway inspection scale, and the third copper ear inspection scale is arranged on the other side close to the second waist-shaped hole.

[0021] Furthermore, the second copper ear inspection scale is spaced 15° from the first waist-shaped hole, and the second copper ear inspection scale is spaced 75° from the second waist-shaped hole; the second keyway inspection scale is 30° from the second copper ear inspection scale, and the second keyway keyway scale is spaced 45° from the second waist-shaped hole; the first keyway inspection scale is 30° from the first waist-shaped hole, and the first keyway inspection scale is 60 degrees from the first waist-shaped hole; the first copper ear inspection scale is 22.5° from the first keyway inspection scale, and the first copper ear inspection scale is 37.5° from the first waist-shaped hole; the third copper ear inspection scale is 10° from the second waist-shaped hole.

[0022] Furthermore, the upper guide sleeve includes an upper guide sleeve with a rotational speed of 500 r / min and an upper guide sleeve with a rotational speed of 428.6 r / min.

[0023] Furthermore, in step b, the specific steps of observing whether the keyway and the copper ear on the upper guide sleeve are aligned with the copper tape inspection scale set on the upper guide sleeve shrink fit tooling are as follows:

[0024] Step b1: Determine whether the upper guide sleeve rotates at a speed of 500 r / min or 428.6 r / min; if the upper guide sleeve rotates at a speed of 500 r / min, execute step b2; if the upper guide sleeve rotates at a speed of 428.6 r / min, execute step b3; if the upper guide sleeve rotates at neither 500 r / min nor 428.6 r / min, execute step b4;

[0025] Step b2: If the upper guide sleeve rotates at 500 r / min, after securing the upper guide sleeve shrink fit fixture to the upper guide sleeve, check whether the keyway of the upper guide sleeve is aligned with the first keyway inspection scale of the upper guide sleeve shrink fit fixture, and whether the copper ear of the upper guide sleeve is aligned with the first copper ear inspection scale of the upper guide sleeve shrink fit fixture;

[0026] Step b3: If the upper guide sleeve rotates at 428.6 rpm, secure the upper guide sleeve shrink fit fixture to the upper guide sleeve and check whether the keyway of the upper guide sleeve is aligned with the second keyway inspection scale of the upper guide sleeve shrink fit fixture, and whether the copper ear of the upper guide sleeve is aligned with the third copper ear inspection scale of the upper guide sleeve shrink fit fixture;

[0027] Step b4: If the upper guide sleeve is an upper guide sleeve of other speeds, after fixing the upper guide sleeve shrink fit tooling to the upper guide sleeve, observe whether the keyway of the upper guide sleeve is aligned with the second keyway inspection scale of the upper guide sleeve shrink fit tooling, and whether the copper ear of the upper guide sleeve is aligned with the second copper ear inspection scale of the upper guide sleeve shrink fit tooling.

[0028] Furthermore, the distance between the upper guide sleeve insulation lower eaves position line and the upper guide sleeve insulation lower eaves is equal to the height from the top surface of the upper guide sliding rotor to the second step; the upper guide sleeve insulation lower eaves position line is located above the upper guide sleeve insulation lower eaves; the distance between the upper guide sleeve lower eaves position line and the upper guide sleeve lower eaves is equal to the height from the top surface of the upper guide sliding rotor to the second step; the upper guide sleeve lower eaves position line is located above the upper guide sleeve lower eaves.

[0029] Furthermore, the height from the top surface of the upper guide rotor to the second step is 19 mm.

[0030] According to the above technical solution, the beneficial effects of the present invention are as follows:

[0031] 1. The present invention utilizes an upper guide sleeve shrink-fit tool, composite paper, an upper guide sleeve insulation lower edge position line, an upper guide sleeve lower edge position line, and a shrink-fit alignment observation line to achieve inspection of the copper tape wrapping direction and angle. This can smoothly assist the upper guide sleeve insulation lower edge in accurately entering the secondary step of the upper guide rotor, and ensure precise alignment during the shrink-fit process during lowering, thereby improving the success rate of shrink-fitting the upper guide rotor and the upper guide sleeve.

[0032] 2. The present invention adopts an upper guide sleeve shrink-fitting tooling, and through the copper tape inspection scale on the upper guide sleeve shrink-fitting tooling, it is possible to check the correctness of the copper tape wrapping angle and direction of the upper guide sleeve at different speeds, thereby avoiding the failure of the shrink-fitting of the upper guide rotor and the upper guide sleeve due to incorrect copper tape wrapping angle and direction, and improving the success rate of the shrink-fitting of the upper guide rotor and the upper guide sleeve.

[0033] 3. The present invention uses composite paper to guide the lower edge of the upper guide sleeve insulation to smoothly enter the secondary step of the upper guide rotor, avoiding damage to the upper guide sleeve insulation caused by manually scraping the upper guide sleeve insulation into the secondary step based on feeling, and improving the success rate of the shrink fit between the upper guide rotor and the upper guide sleeve.

[0034] 4. The present invention adopts the upper guide sleeve insulation lower eaves position line and the upper guide sleeve lower eaves position line. Through the upper guide sleeve insulation lower eaves position line and the upper guide sleeve lower eaves position line, accurate judgment of the depth of the upper guide sleeve insulation lower eaves entering the secondary step is achieved, avoiding the technical problems of falling too deep, causing the upper guide sleeve insulation lower eaves to turn outward, or falling too shallow, causing the upper guide sleeve insulation to encounter the high-temperature upper guide sliding rotor, causing the upper guide sleeve insulation to wrinkle, causing the upper guide sleeve insulation to be exposed from the secondary step of the upper guide sliding rotor, and causing the upper guide sliding rotor and the upper guide sleeve to fail to be thermally fitted.

[0035] 5. The present invention adopts a shrink-fit alignment observation line. By keeping the shrink-fit alignment observation line perpendicular to the upper plane of the upper guide rotor during the lowering process, the problem of the upper guide sleeve being unable to be accurately aligned throughout the shrink-fit process is solved, and a large amount of rework caused by misalignment is avoided, thereby improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a top view schematic diagram of the upper guide rotor assembly.

[0037] Figure 2 It is a schematic front view of the upper guide rotor assembly.

[0038] Figure 3 It is a schematic diagram of the secondary steps of the upper guide rotor.

[0039] Figure 4 yes Figure 2 An enlarged schematic diagram of the secondary step at Z.

[0040] Figure 5 This is a schematic diagram of the upper guide rotor assembly after the upper guide sleeve shrink fit fixture is installed.

[0041] Figure 6 This is a schematic diagram of the upper guide sleeve insulation starting to enter the step.

[0042] Figure 7 This is a schematic diagram of pulling out the composite paper.

[0043] Figure 8 It is a schematic diagram of the shrink sleeve alignment observation line.

[0044] Figure 9 This is a schematic diagram of the upper guide sleeve with a rotation speed of 500r / min after being wrapped with copper belt.

[0045] Figure 10 This is a schematic diagram of the upper guide sleeve with a rotational speed of 428.6 r / min after being wrapped with copper belt.

[0046] Figure 11 This is a schematic diagram of the upper guide sleeve at other speeds after being wrapped with copper strip.

[0047] Figure 12 Schematic diagram of the upper guide sleeve shrink fit fixture. DETAILED DESCRIPTION

[0048] The purpose, technical solutions and advantages of the embodiments of the present application are clearer. The technical solutions in the embodiments of the present application will be clearly and completely described below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments.

[0049] Example 1

[0050] A method for improving the success rate of shrinkage between a sliding rotor and a sleeve of a pumped storage unit comprises the following steps:

[0051] Step 1: Use the upper guide sleeve shrink fitting to check whether the copper tape wrapping direction and angle of the upper guide sleeve are qualified;

[0052] Step 2: If Figure 8 As shown in the figure, when the direction and angle of the copper tape wrapping are qualified, take the copper ear of the upper guide sleeve as the starting point and draw a shrink sleeve alignment observation line along the axial direction of the upper guide sleeve; at the same time, draw the upper guide sleeve insulation lower end position line and the upper guide sleeve lower end position line at the lower end of the upper guide sleeve insulation outer side from the top surface of the upper guide rotor to the height of the second step;

[0053] Step 3: Start lowering the upper guide sleeve into the upper guide rotor. During the lowering process, keep the shrink sleeve alignment observation line aligned with the upper guide rotor U-shaped groove on the upper plane of the upper guide rotor;

[0054] Step 4: If Figure 3 and Figure 4 As shown, when the upper guide sleeve moves to the point where the upper plane of the upper guide rotor is flush with the position line of the insulating lower edge of the upper guide sleeve, the insulating lower edge of the upper guide sleeve, as shown in FIG. Figure 6 As shown, the composite paper is used to guide the rotor into the second step.

[0055] Step 5: If Figure 7 As shown in FIG, when the upper guide sleeve moves to the upper plane of the upper guide sliding rotor and exceeds the insulation lower edge position line of the upper guide sleeve, but the upper plane of the upper guide sliding rotor does not reach the lower edge position line of the upper guide sleeve, the composite paper is pulled out and the lowering is continued until the upper plane of the upper guide sleeve is flush with the upper plane of the upper guide sliding rotor, and the lowering is completed. Figure 1 and Figure 2 As shown, complete the heat shrink fitting; Figure 9 、 Figure 10 and Figure 11 As shown, the copper ear should be embedded in the U-shaped groove of the upper guide rotor after heat-shrink fitting to protect the copper ear.

[0056] In step one, the upper guide sleeve shrink fitting is a circular ring structure, with waist-shaped holes opened at equal intervals on the circumference of the ring, and a boss is provided on part of the ring at the waist-shaped holes in the opposite direction toward the center of the circle; in step one, four sleeve single-piece lifting holes are opened on the ring of the upper guide sleeve at equal intervals in the direction of the circumference; the inner wall of the upper guide sleeve is provided with a keyway running from the top ring to the bottom ring.

[0057] The distance between the upper guide sleeve insulation lower edge position line and the upper guide sleeve insulation lower edge is equal to the height from the top surface of the upper guide sliding rotor to the second step; the upper guide sleeve insulation lower edge position line is located above the upper guide sleeve insulation lower edge; the distance between the upper guide sleeve lower edge position line and the upper guide sleeve lower edge is equal to the height from the top surface of the upper guide sliding rotor to the second step; the upper guide sleeve lower edge position line is located above the upper guide sleeve lower edge; the height from the top surface of the upper guide sliding rotor to the second step is 19 mm. Depending on the upper guide sliding rotor, the height from the top surface of the upper guide sliding rotor to the second step may also vary. The height from the top surface of the upper guide sliding rotor to the second step is not limited here, and 19 mm is only an example of this embodiment.

[0058] Example 2

[0059] Based on Example 1, in step 1, the specific steps of using the upper guide sleeve shrink fitting to check whether the copper tape wrapping direction and angle of the upper guide sleeve are qualified are as follows:

[0060] Step a: If Figure 5 As shown in the figure, fix the waist-shaped hole on the upper guide sleeve shrink fitting and the sleeve single-piece lifting hole on the upper guide sleeve with bolts; Figure 5 The upper guide sleeve and the upper guide sleeve shrink fit fixture fastening unit are fastened by bolts;

[0061] Step b: After the fixation is completed, observe the keyway and copper ear on the upper guide sleeve to see if they are aligned with the copper belt inspection scale set on the upper guide sleeve shrink fit tooling. If the keyway and copper ear are aligned with the copper belt inspection scale, the direction and angle of the copper belt are qualified; if the keyway, copper ear, or the keyway and copper ear are not aligned with the copper belt inspection scale, the direction and angle of the copper belt are unqualified.

[0062] Copper tape inspection scale pairs include Figure 9 As shown, the first scale pair used to check the direction and angle of the copper belt wrapping around the guide sleeve at a speed of 500r / min is as follows: Figure 10 As shown, the second scale used to check the direction and angle of the copper belt wrapping around the guide sleeve at a speed of 428.6 r / min is as follows Figure 11 As shown, the third scale pair is used to check the direction and angle of the copper tape wrapping around the guide sleeve at other speeds.

[0063] like Figure 12As shown, the first scale pair includes the first copper ear inspection scale and the first keyway inspection scale, the second scale pair includes the second copper ear inspection scale and the second keyway inspection scale, and the third scale pair includes the third copper ear inspection scale and the second keyway inspection scale; the first copper ear inspection scale, the second copper ear inspection scale, the first keyway inspection scale and the second keyway inspection scale are arranged between the first waist-shaped hole and the second waist-shaped hole of the upper guide sleeve heat-fitting tooling, and from one side of the first waist-shaped hole to the side of the adjacent second waist-shaped hole, they are distributed on the upper guide sleeve heat-fitting tooling in sequence as the second copper ear inspection scale, the first copper ear inspection scale, the second keyway inspection scale and the first keyway inspection scale, and the third copper ear inspection scale is arranged on the other side close to the second waist-shaped hole.

[0064] like Figure 12 As shown, the second copper ear inspection scale is spaced 15° from the first waist-shaped hole, and the second copper ear inspection scale is spaced 75° from the second waist-shaped hole; the second keyway inspection scale is 30° from the second copper ear inspection scale, and the second keyway keyway scale is spaced 45° from the second waist-shaped hole; the first keyway inspection scale is 30° from the first waist-shaped hole, and the first keyway inspection scale is 60 degrees from the first waist-shaped hole; the first copper ear inspection scale is 22.5° from the first keyway inspection scale, and the first copper ear inspection scale is 37.5° from the first waist-shaped hole; the third copper ear inspection scale is 10° from the second waist-shaped hole.

[0065] The upper guide sleeve includes an upper guide sleeve with a rotation speed of 500r / min and an upper guide sleeve with a rotation speed of 428.6r / min.

[0066] In step b, observe the keyway and copper ear on the upper guide sleeve to see if they are aligned with the copper tape inspection scale set on the upper guide sleeve shrink fit fixture. The specific steps are as follows:

[0067] Step b1: Determine whether the upper guide sleeve rotates at a speed of 500 r / min or 428.6 r / min; if the upper guide sleeve rotates at a speed of 500 r / min, execute step b2; if the upper guide sleeve rotates at a speed of 428.6 r / min, execute step b3; if the upper guide sleeve rotates at neither 500 r / min nor 428.6 r / min, execute step b4;

[0068] Step b2: If the upper guide sleeve rotates at 500 r / min, after securing the upper guide sleeve shrink fit fixture to the upper guide sleeve, check whether the keyway of the upper guide sleeve is aligned with the first keyway inspection scale of the upper guide sleeve shrink fit fixture, and whether the copper ear of the upper guide sleeve is aligned with the first copper ear inspection scale of the upper guide sleeve shrink fit fixture;

[0069] Step b3: If the upper guide sleeve rotates at 428.6 rpm, secure the upper guide sleeve shrink fit fixture to the upper guide sleeve and check whether the keyway of the upper guide sleeve is aligned with the second keyway inspection scale of the upper guide sleeve shrink fit fixture, and whether the copper ear of the upper guide sleeve is aligned with the third copper ear inspection scale of the upper guide sleeve shrink fit fixture;

[0070] Step b4: If the upper guide sleeve is an upper guide sleeve of other speeds, after fixing the upper guide sleeve shrink fit tooling to the upper guide sleeve, observe whether the keyway of the upper guide sleeve is aligned with the second keyway inspection scale of the upper guide sleeve shrink fit tooling, and whether the copper ear of the upper guide sleeve is aligned with the second copper ear inspection scale of the upper guide sleeve shrink fit tooling.

[0071] The above description is a detailed description of the preferred feasible embodiment of the present application, but the embodiment is not intended to limit the scope of the patent application of the present application. Any equivalent changes or modifications completed under the technical spirit suggested by the present application should fall within the scope of the patent covered by the present application.

Claims

1. A method for improving the success rate of shrinkage between a sliding rotor and a sleeve of a pumped storage unit, characterized in that: The steps include: Step 1: Use the upper guide sleeve shrink fitting to check whether the copper tape wrapping direction and angle of the upper guide sleeve are qualified; Step 2: When the direction and angle of the copper tape wrapping are qualified, take the copper ear of the upper guide sleeve as the starting point and draw a shrink sleeve alignment observation line along the axial direction of the upper guide sleeve; at the same time, draw the lower end position line of the upper guide sleeve insulation and the lower end position line of the upper guide sleeve at the lower end of the outer side of the upper guide sleeve insulation; Step 3: Start lowering the upper guide sleeve into the upper guide rotor. During the lowering process, keep the shrink sleeve alignment observation line aligned with the upper guide rotor U-shaped groove on the upper plane of the upper guide rotor; Step 4: When the upper guide sleeve moves to the point where the upper plane of the upper guide rotor is flush with the position line of the upper guide sleeve insulation lower edge, the upper guide sleeve insulation lower edge begins to enter the second step of the guide rotor under the guidance of the composite paper; Step 5: When the upper guide sleeve moves to the upper plane of the upper guide rotor and exceeds the insulation lower edge position line of the upper guide sleeve, but the upper plane of the upper guide rotor does not reach the lower edge position line of the upper guide sleeve, pull out the composite paper and continue to lower it until the upper plane of the upper guide sleeve is flush with the upper plane of the upper guide rotor. Then, the lowering is completed and the shrink fitting is completed.

2. The method for improving the success rate of shrinkage between the sliding rotor and the sleeve of a pumped storage unit according to claim 1, characterized in that: In the step 1, the upper guide sleeve shrink fitting is a circular ring structure, with waist-shaped holes opened at equal intervals on the circumference of the ring, and a boss is provided on part of the ring at the waist-shaped holes in the opposite direction toward the center of the circle; in the step 1, four sleeve single-piece lifting holes are opened on the ring of the upper guide sleeve at equal intervals in the direction of the circumference; the inner wall of the upper guide sleeve is provided with a keyway running from the top ring to the bottom ring.

3. The method for improving the success rate of shrinkage between the sliding rotor and the sleeve of a pumped storage unit according to claim 1, characterized in that: In step 1, the specific steps for using the upper guide sleeve shrink fitting to check whether the copper tape wrapping direction and angle of the upper guide sleeve are qualified are as follows: Step a: Fix the waist-shaped hole on the upper guide sleeve shrink fitting and the sleeve single-piece lifting hole on the upper guide sleeve with bolts; Step b: After the fixation is completed, observe the keyway and copper ear on the upper guide sleeve to see if they are aligned with the copper belt inspection scale set on the upper guide sleeve shrink fit tooling. If the keyway and copper ear are aligned with the copper belt inspection scale, the direction and angle of the copper belt are qualified; if the keyway, copper ear, or the keyway and copper ear are not aligned with the copper belt inspection scale, the direction and angle of the copper belt are unqualified.

4. The method for improving the success rate of shrinkage between the sliding rotor and the sleeve of a pumped storage unit according to claim 3, characterized in that: The copper belt inspection scale pair includes a first scale pair for checking the copper belt wrapping direction and angle of the guide sleeve at a speed of 500r / min, a second scale pair for checking the copper belt wrapping direction and angle of the guide sleeve at a speed of 428.6r / min, and a third scale pair for checking the copper belt wrapping direction and angle of the guide sleeve at other speeds.

5. The method for improving the success rate of shrinkage between the sliding rotor and the sleeve of a pumped storage unit according to claim 4, characterized in that: The first scale pair includes the first copper ear inspection scale and the first keyway inspection scale, the second scale pair includes the second copper ear inspection scale and the second keyway inspection scale, and the third scale pair includes the third copper ear inspection scale and the second keyway inspection scale; the first copper ear inspection scale, the second copper ear inspection scale, the first keyway inspection scale and the second keyway inspection scale are arranged between the first waist-shaped hole and the second waist-shaped hole of the upper guide sleeve shrink-fit tooling, and from one side of the first waist-shaped hole to the side of the adjacent second waist-shaped hole, they are distributed on the upper guide sleeve shrink-fit tooling in sequence as the second copper ear inspection scale, the first copper ear inspection scale, the second keyway inspection scale and the first keyway inspection scale, and the third copper ear inspection scale is arranged on the other side close to the second waist-shaped hole.

6. The method for improving the success rate of shrinkage between the sliding rotor and the sleeve of a pumped storage unit according to claim 5, characterized in that: The second copper ear inspection scale is spaced 15° from the first waist-shaped hole, and the second copper ear inspection scale is spaced 75° from the second waist-shaped hole; the second keyway inspection scale is spaced 30° from the second copper ear inspection scale, and the second keyway scale is spaced 45° from the second waist-shaped hole; the first keyway inspection scale is spaced 30° from the first waist-shaped hole, and the first keyway inspection scale is spaced 60 degrees from the first waist-shaped hole; the first copper ear inspection scale is spaced 22.5° from the first keyway inspection scale, and the first copper ear inspection scale is spaced 37.5° from the first waist-shaped hole; the third copper ear inspection scale is spaced 10° from the second waist-shaped hole.

7. The method for improving the success rate of shrinkage between the sliding rotor and the sleeve of a pumped storage unit according to claim 1, characterized in that: The upper guide sleeve includes an upper guide sleeve with a rotation speed of 500r / min and an upper guide sleeve with a rotation speed of 428.6r / min.

8. The method for improving the success rate of shrinkage between the sliding rotor and the sleeve of a pumped storage unit according to claim 3, characterized in that: In step b, the specific steps for observing whether the keyway and the copper ear on the upper guide sleeve are aligned with the copper belt inspection scale set on the upper guide sleeve shrink fit tooling are as follows: Step b1: Determine whether the upper guide sleeve rotates at a speed of 500 r / min or 428.6 r / min; if the upper guide sleeve rotates at a speed of 500 r / min, execute step b2; if the upper guide sleeve rotates at a speed of 428.6 r / min, execute step b3; if the upper guide sleeve rotates at neither 500 r / min nor 428.6 r / min, execute step b4; Step b2: If the upper guide sleeve rotates at 500 r / min, after securing the upper guide sleeve shrink fit fixture to the upper guide sleeve, check whether the keyway of the upper guide sleeve is aligned with the first keyway inspection scale of the upper guide sleeve shrink fit fixture, and whether the copper ear of the upper guide sleeve is aligned with the first copper ear inspection scale of the upper guide sleeve shrink fit fixture; Step b3: If the upper guide sleeve rotates at 428.6 rpm, secure the upper guide sleeve shrink fit fixture to the upper guide sleeve and check whether the keyway of the upper guide sleeve is aligned with the second keyway inspection scale of the upper guide sleeve shrink fit fixture, and whether the copper ear of the upper guide sleeve is aligned with the third copper ear inspection scale of the upper guide sleeve shrink fit fixture; Step b4: If the upper guide sleeve is an upper guide sleeve of other speeds, after fixing the upper guide sleeve shrink fit tooling to the upper guide sleeve, observe whether the keyway of the upper guide sleeve is aligned with the second keyway inspection scale of the upper guide sleeve shrink fit tooling, and whether the copper ear of the upper guide sleeve is aligned with the second copper ear inspection scale of the upper guide sleeve shrink fit tooling.

9. The method for improving the success rate of shrinkage between the sliding rotor and the sleeve of a pumped storage unit according to claim 1, characterized in that: The distance between the upper guide sleeve insulation lower eaves position line and the upper guide sleeve insulation lower eaves is equal to the height from the top surface of the upper guide sliding rotor to the second step; the upper guide sleeve insulation lower eaves position line is located above the upper guide sleeve insulation lower eaves; the distance between the upper guide sleeve lower eaves position line and the upper guide sleeve lower eaves is equal to the height from the top surface of the upper guide sliding rotor to the second step; the upper guide sleeve lower eaves position line is located above the upper guide sleeve lower eaves.

10. The method for improving the success rate of shrinkage between the sliding rotor and the sleeve of a pumped storage unit according to claim 9, characterized in that: The height from the top surface of the upper guide rotor to the second step is 19 mm.

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