Method for improving shrinkage fit success rate of sliding rotor and sleeve of pumped storage unit

Abstract

The invention relates to the field of assembling and manufacturing, in particular to a method for improving the hot sleeving success rate of a sliding rotor and a sleeve of a pumped storage unit. The method comprises the following steps: checking whether a copper strip enclosure is qualified or not by using an upper guide sleeve shrinkage fit tool; when the surrounding of the copper strip is qualified, a hot jacket alignment observation line is drawn in the axial direction of the upper guide sleeve; the upper guide sleeve is lowered into the upper guide sliding rotor; the insulating lower brim of the upper guide sleeve enters the second-stage step of the guide sliding rotor through the guide of the composite paper; if the upper plane of the upper guide sliding rotor does not reach the position line of the lower brim of the upper guide sleeve, drawing out the composite paper, lowering until the upper plane of the upper guide sleeve is flush with the upper plane of the upper guide sliding rotor, ending lowering, and completing hot jacket; the device has the advantages that the technical effects of checking the surrounding direction and angle of the copper strip, assisting the insulating lower brim of the upper guide sleeve to accurately enter the two-stage step of the upper guide sliding rotor and ensuring accurate alignment in the shrinkage fit process during lowering are realized, so that the success rate of shrinkage fit of the upper guide sliding rotor and the upper guide sleeve is improved.

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 thermal sleeve 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 energy storage. When the grid reaches peak load, the station releases water back to the lower reservoir to generate electricity. This hydropower station is also called a storage hydropower station.

[0003] The upper guide rotor assembly on the pumped storage unit in the pumped storage station consists of an upper guide rotor, an upper guide sleeve, shaft insulation and a copper belt; the shaft insulation is used to isolate the shaft current path of the shaft system, and the copper belt is set inside the insulation to divide the shaft insulation into two parts, inside and outside, for online monitoring of the shaft insulation performance; in order to prevent relative sliding between the upper guide rotor and the upper guide sleeve when the unit is running, an interference fit is adopted between the two, and the tightness of the fit is about 2mm; this assembly method has the largest tightness in all hydropower projects and is the most difficult to assemble.

[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 observed and can only be scraped in by feeling using an insulating strip; however, with this type of assembly, the depth of the lower end of the upper guide sleeve insulation falling 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 be turned outward, causing the thermal sleeve to fail; if the lower end of the upper guide sleeve insulation falls into the secondary step of the upper guide sliding rotor too shallowly, the insulation will wrinkle when it encounters the high-temperature 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 the thermal sleeve of the pumped storage unit.

[0005] For example, a Chinese patent with application number 201920592056.9 and application date 2019.04.26, is named as a utility model patent "A tooling for vertically lifting cast aluminum rotors of motors". Its technical solution is as follows: This tooling 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 portion tilted outward, which is used to force the hook resting thereon to swing outward around the hinge axis under the action of gravity. During the process of heat-shrinking the rotor, this tooling 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 heat shrink fitting. There are still technical problems such as the failure of heat 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. 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 insulation to enter the secondary step of the upper guide sliding rotor.

[0008] In order to achieve the above technical effects, the technical solution of this application is as follows: A method for improving the success rate of shrink-fitting between a sliding rotor and a sleeve of a pumped storage unit comprises the following steps: Step 1: Use the upper guide sleeve heat-fitting tool to check whether the copper belt 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 hot 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; Step 3: Start lowering the upper guide sleeve into the upper guide rotor. During the lowering process, keep the shrink sleeve 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 insulating lower edge of the upper guide sleeve, the insulating lower edge of the upper guide sleeve begins to enter the secondary 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 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, then 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 sliding rotor, then end the lowering and complete the heat-shrink fitting.

[0009] Furthermore, in the step one, the upper guide sleeve shrink-fit tooling is a circular ring structure, with waist-shaped holes evenly spaced 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 to the center of the circle; on the ring of the upper guide sleeve in the step one, four single-piece sleeve lifting holes are evenly spaced 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.

[0010] Furthermore, in the step 1, the specific steps of using the upper guide sleeve heat-fitting tool to check whether the copper belt 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 by bolts; Step b: After the fixation is completed, observe whether the keyway and copper ear on the upper guide sleeve are aligned with the copper belt inspection scale set on the upper guide sleeve shrink fitting. 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.

[0011] 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 rotation speed of 500r / min, a second scale pair for checking the copper belt wrapping direction and angle of the guide sleeve at a rotation 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 rotation speeds.

[0012] Furthermore, the first scale pair includes a first copper ear inspection scale and a first keyway inspection scale, the second scale pair includes a second copper ear inspection scale and a second keyway inspection scale, and the third scale pair includes a third copper ear inspection scale and a 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 a third copper ear inspection scale is arranged on the other side close to the second waist-shaped hole.

[0013] 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 spaced 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 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.

[0014] Furthermore, the upper guide sleeve includes an upper guide sleeve with a rotation speed of 500 r / min and an upper guide sleeve with a rotation speed of 428.6 r / min.

[0015] 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 belt inspection scale set on the upper guide sleeve shrink fitting are as follows: Step b1: Determine whether the upper guide sleeve is an upper guide sleeve with a rotation speed of 500 r / min or an upper guide sleeve with a rotation speed of 428.6 r / min; when the upper guide sleeve is an upper guide sleeve with a rotation speed of 500 r / min, execute step b2; when the upper guide sleeve is an upper guide sleeve with a rotation speed of 428.6 r / min, execute step b3; when the upper guide sleeve is neither an upper guide sleeve with a rotation speed of 500 r / min nor an upper guide sleeve with a rotation speed of 428.6 r / min, execute step b4; Step b2: If the upper guide sleeve has a rotation speed of 500 r / min, 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 first 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 first copper ear inspection scale of the upper guide sleeve shrink fit tooling; Step b3: If the upper guide sleeve has a rotation speed of 428.6 r / min, 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 third copper ear inspection scale of the upper guide sleeve shrink fit tooling; Step b4: If the upper guide sleeve is an upper guide sleeve of other rotational 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.

[0016] Furthermore, the distance between the upper guide sleeve insulation lower eave position line and the upper guide sleeve insulation lower eave 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 eave position line is located above the upper guide sleeve insulation lower eave; the distance between the upper guide sleeve lower eave position line and the upper guide sleeve lower eave is equal to the height from the top surface of the upper guide sliding rotor to the second step; the upper guide sleeve lower eave position line is located above the upper guide sleeve lower eave.

[0017] Furthermore, the height from the top surface of the upper guide rotor to the second step is 19 mm.

[0018] According to the above technical solution, the beneficial effects of the present invention are as follows: 1. The present invention realizes the inspection of the copper belt wrapping direction and angle by adopting the upper guide sleeve heat-shrink tooling, composite paper, the upper guide sleeve insulation lower edge position line, the upper guide sleeve lower edge position line and the heat-shrink alignment observation line, which can smoothly assist the upper guide sleeve insulation 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 heat-shrink process when lowering, thereby improving the success rate of the heat-shrink of the upper guide sliding rotor and the upper guide sleeve.

[0019] 2. The present invention adopts an upper guide sleeve shrink-fitting tooling, and through the copper belt inspection scale on the upper guide sleeve shrink-fitting tooling, it is possible to check the correctness of the copper belt wrapping angle and direction of the upper guide sleeve at different rotation speeds, thereby avoiding the failure of the shrink-fitting of the upper guide sliding rotor and the upper guide sleeve due to incorrect copper belt wrapping angle and direction, and improving the success rate of the shrink-fitting of the upper guide sliding rotor and the upper guide sleeve.

[0020] 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 sliding rotor, avoiding the damage to the upper guide sleeve insulation caused by scraping the upper guide sleeve insulation into the secondary step by manual feeling, and improving the success rate of the upper guide sliding rotor and the upper guide sleeve thermal sleeve.

[0021] 4. The present invention adopts an upper guide sleeve insulation lower eaves position line and an 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, thereby 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 sleeved.

[0022] 5. The present invention adopts a shrink sleeve alignment observation line, which solves the problem that the upper guide sleeve cannot be accurately aligned throughout the shrink sleeve process by keeping the shrink sleeve alignment observation line perpendicular to the upper plane of the upper guide rotor during the lowering process, avoids a large amount of rework caused by misalignment, and thus improves production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a top view schematic diagram of the upper guide rotor assembly.

[0024] Figure 2 It is a schematic front view of the upper guide rotor assembly.

[0025] Figure 3 It is a schematic diagram of the two-stage steps of the upper guide rotor.

[0026] Figure 4 yes Figure 2 An enlarged schematic diagram of the secondary step at Z.

[0027] Figure 5 It is a schematic diagram of the upper guide sliding rotor assembly after the upper guide sleeve shrink fitting is installed.

[0028] Figure 6 This is a schematic diagram of the upper guide sleeve insulation starting to enter the step.

[0029] Figure 7 It is a schematic diagram of pulling out the composite paper.

[0030] Figure 8 It is a schematic diagram of the observation line for heat sleeve alignment.

[0031] Fig. 9 This is a schematic diagram of the upper guide sleeve with a rotation speed of 500r / min after being wrapped with copper belt.

[0032] Fig.10 This is a schematic diagram of the upper guide sleeve with a rotation speed of 428.6r / min after being wrapped with copper belt.

[0033] Fig.11 This is a schematic diagram of the upper guide sleeve at other rotation speeds after being wrapped with copper belt.

[0034] Fig.12 Schematic diagram of the upper guide sleeve shrink fitting tooling. DETAILED DESCRIPTION

[0035] 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 conjunction 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.

[0036] Example 1 A method for improving the success rate of shrink-fitting between a sliding rotor and a sleeve of a pumped storage unit comprises the following steps: Step 1: Use the upper guide sleeve heat-fitting tool to check whether the copper belt wrapping direction and angle of the upper guide sleeve are qualified; Step 2: If Figure 8 As shown in the figure, when the direction and angle of the copper belt 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, from the top surface of the upper guide rotor to the height of the second step, 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; Step 3: Start lowering the upper guide sleeve into the upper guide rotor. During the lowering process, keep the shrink sleeve aligned with the upper guide rotor U-shaped groove on the upper plane of the upper guide rotor; Step 4: If Figure 3 and Figure 4As 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 sliding rotor into the second step. Step 5: If Figure 7 As shown in FIG. 1 , when the upper guide sleeve moves to the upper plane of the upper guide sliding rotor and exceeds the insulating 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 at this time 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 set; Fig. 9 , Fig.10 and Fig.11 As shown, after the copper ear is heat-fitted, it should be buried in the U-shaped groove of the upper guide rotor to protect the copper ear.

[0037] In step one, the upper guide sleeve shrink fitting is a circular ring structure, with waist-shaped holes evenly spaced 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 to the center of the circle; on the ring of the upper guide sleeve in step one, four sleeve single-piece lifting holes are evenly spaced 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.

[0038] 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; the height from the top surface of the upper guide sliding rotor to the second step is 19 mm, and the height from the top surface of the upper guide sliding rotor to the second step may also be different depending on the upper guide sliding rotor. 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.

[0039] Example 2 Based on Example 1, the specific steps of using the upper guide sleeve heat-fitting tool in step 1 to check whether the copper belt wrapping direction and angle of the upper guide sleeve are qualified are as follows: Step a: Figure 5 As shown, the waist-shaped hole on the upper guide sleeve shrink fitting and the sleeve single-piece lifting hole on the upper guide sleeve are fixed by bolts; Figure 5 The upper guide sleeve and the upper guide sleeve heat-fitting fixture fastening unit are fastened by bolts; Step b: After the fixation is completed, observe whether the keyway and copper ear on the upper guide sleeve are aligned with the copper belt inspection scale set on the upper guide sleeve shrink fitting. 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.

[0040] Copper tape inspection scale pairs include: Fig. 9 As shown in the figure, the first scale pair used to check the direction and angle of the copper belt wrapping of the guide sleeve at a speed of 500r / min is as follows: Fig.10 As shown in the figure, the second scale pair used to check the direction and angle of the copper belt wrapping on the guide sleeve at a speed of 428.6r / min is as follows Fig.11 As shown, a third scale pair is used to check the direction and angle of the copper tape wrapping around the guide sleeve at other speeds.

[0041] like Fig.12 As 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.

[0042] like Fig.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 spaced 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 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.

[0043] 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.

[0044] In step b, observe whether the keyway and copper ear on the upper guide sleeve are aligned with the copper belt inspection scale set on the upper guide sleeve shrink fitting. The specific steps are as follows: Step b1: Determine whether the upper guide sleeve is an upper guide sleeve with a rotation speed of 500 r / min or an upper guide sleeve with a rotation speed of 428.6 r / min; when the upper guide sleeve is an upper guide sleeve with a rotation speed of 500 r / min, execute step b2; when the upper guide sleeve is an upper guide sleeve with a rotation speed of 428.6 r / min, execute step b3; when the upper guide sleeve is neither an upper guide sleeve with a rotation speed of 500 r / min nor an upper guide sleeve with a rotation speed of 428.6 r / min, execute step b4; Step b2: If the upper guide sleeve has a rotation speed of 500 r / min, 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 first 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 first copper ear inspection scale of the upper guide sleeve shrink fit tooling; Step b3: If the upper guide sleeve has a rotation speed of 428.6 r / min, 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 third copper ear inspection scale of the upper guide sleeve shrink fit tooling; Step b4: If the upper guide sleeve is an upper guide sleeve of other rotational 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.

[0045] 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 patent application scope of the present application. All equivalent changes or modified changes made under the technical spirit suggested by the present application should fall within the patent scope covered by the present application.

Claims

1. A method for improving the success rate of shrink-fitting 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 heat-fitting tool to check whether the copper belt 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 hot 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; Step 3: Start lowering the upper guide sleeve into the upper guide rotor. During the lowering process, keep the shrink sleeve 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 insulating lower edge of the upper guide sleeve, the insulating lower edge of the upper guide sleeve begins to enter the secondary 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 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, then 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 sliding rotor, then end the lowering and complete the heat-shrink fitting.

2. The method for improving the success rate of shrink-fitting between the sliding rotor and the sleeve of a pumped storage unit according to claim 1, characterized in that: In the step one, the upper guide sleeve shrink fitting is a circular ring structure, with waist-shaped holes evenly spaced 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 to the center of the circle; on the ring of the upper guide sleeve in the step one, four sleeve single-piece lifting holes are evenly spaced 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.

3. The method for improving the success rate of shrink-fitting 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 of using the upper guide sleeve heat-fitting tool to check whether the copper belt 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 by bolts; Step b: After the fixation is completed, observe whether the keyway and copper ear on the upper guide sleeve are aligned with the copper belt inspection scale set on the upper guide sleeve shrink fitting. 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 shrink-fitting 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 rotation speed of 500r / min, a second scale pair for checking the copper belt wrapping direction and angle of the guide sleeve at a rotation 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 rotation speeds.

5. The method for improving the success rate of shrink-fitting between the sliding rotor and the sleeve of a pumped storage unit according to claim 4, characterized in that: The first scale pair includes a first copper ear inspection scale and a first keyway inspection scale, the second scale pair includes a second copper ear inspection scale and a second keyway inspection scale, and the third scale pair includes a third copper ear inspection scale and a 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 a 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 shrink-fitting 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 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 shrink-fitting 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 shrink-fitting 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 of 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 fitting are as follows: Step b1: Determine whether the upper guide sleeve is an upper guide sleeve with a rotation speed of 500 r / min or an upper guide sleeve with a rotation speed of 428.6 r / min; when the upper guide sleeve is an upper guide sleeve with a rotation speed of 500 r / min, execute step b2; when the upper guide sleeve is an upper guide sleeve with a rotation speed of 428.6 r / min, execute step b3; when the upper guide sleeve is neither an upper guide sleeve with a rotation speed of 500 r / min nor an upper guide sleeve with a rotation speed of 428.6 r / min, execute step b4; Step b2: If the upper guide sleeve has a rotation speed of 500 r / min, 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 first 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 first copper ear inspection scale of the upper guide sleeve shrink fit tooling; Step b3: If the upper guide sleeve has a rotation speed of 428.6 r / min, 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 third copper ear inspection scale of the upper guide sleeve shrink fit tooling; Step b4: If the upper guide sleeve is an upper guide sleeve of other rotational 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 shrink-fitting 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 eave position line and the upper guide sleeve insulation lower eave 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 eave position line is located above the upper guide sleeve insulation lower eave; the distance between the upper guide sleeve lower eave position line and the upper guide sleeve lower eave is equal to the height from the top surface of the upper guide sliding rotor to the second step; the upper guide sleeve lower eave position line is located above the upper guide sleeve lower eave.

10. The method for improving the success rate of shrink-fitting 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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