Large-scale apparatus having a spliced stator and method for connecting a spliced stator

Abstract

The present application provides a large equipment with spliced stator, which is used to solve the technical problem that the stators of the existing large equipment need to be connected accurately and at the same time can adapt to the small displacement amount generated after the equipment is running during connection. The large equipment of the present application involves two independent components, namely a first stator and a second stator. The first stator is provided with a guide rail, and the second stator is provided with a guide key. The first stator and the second stator are spliced by matching the connecting key protruding on the guide key with the connecting groove recessed on the guide rail, thereby providing accurate support position for the rotor, so as to realize the safe operation of the rotating equipment. The present application also provides a connecting method of the spliced stator. The size of the gap L1 can be directly adjusted by adjusting the supporting screw, and the size of the sum of the two gaps L2 can be indirectly controlled by adjusting the gap L1, thereby realizing the accurate adjustment of the sum of the two gaps L2.

Description

Technical Field

[0001] This invention relates to components of two stators in large equipment and methods for connecting them, specifically to large equipment with spliced ​​stators and methods for connecting spliced ​​stators. Background Technology

[0002] For some large equipment with stators and rotors, the rotor and stator need to cooperate with each other during operation, and the rotor also needs to be positioned by bearings. For example, a turbine rotating device includes a rotor and two stators mounted on two separate parts. The rotor needs to maintain effective cooperation with one stator and also needs to be connected to the other stator via bearings to achieve a certain degree of energy recovery and utilization. To ensure that the rotor does not deviate radially when rotating around its central axis, the stator is required to provide precise positioning and support for the rotor. At the same time, a small gap must be maintained between the rotor and the bearings to prevent friction between the rotor and the bearings during operation.

[0003] In existing technologies, the rotor typically passes through two stators, with the rotor mating with one stator, requiring stator support for positioning. Since the two stators are located on two different parts of the equipment, during the operation of the turbine rotating equipment, some displacement or vibration inevitably occurs in both parts, affecting rotor support and causing stator twisting, deformation, or even damage. Precisely connecting the two stator components on large equipment can achieve good positioning and support of the rotor, ensuring a precise fit with the bearings and guaranteeing the normal operation of the large equipment. However, because the rotor rotates at high speed during operation, the two stators inevitably experience displacement during the connection. Therefore, not only is high precision required in the connection between the two stators, but the connection cannot be completely fixed; a certain gap must be maintained. Thus, a large-scale device and connection method are needed that can satisfy both precise stator connection and accommodate small displacements during connection. Summary of the Invention

[0004] The purpose of this invention is to solve the technical problem of achieving precise connection between stators of existing large equipment while also accommodating small displacement of related parts during connection. The invention proposes a large equipment with spliced ​​stators and a connection method for spliced ​​stators.

[0005] To solve the above-mentioned technical problems, the technical solution provided by the present invention is as follows:

[0006] A large piece of equipment with a spliced ​​stator includes a rotor and a first stator that cooperates with the rotor, and also includes a second stator and a bearing mounted on the second stator, wherein the rotor is connected to the second stator through the bearing; the special feature is that: a guide rail is provided on the first stator or the second stator, and a guide key corresponding to the guide rail is provided on the second stator or the first stator;

[0007] The guide rail includes a first base plate and a guide rail disposed on one side of the first base plate. The guide rail includes two opposing and perpendicularly disposed baffles on one side of the first base plate and two pads. The two pads are respectively disposed on the inner walls of the two baffles; a connecting groove is formed between the two pads.

[0008] Each baffle has multiple threaded through holes distributed along its length for passing through support screws or connecting screws; the pad has support grooves and connecting through holes corresponding to the positions of the threaded through holes; the support screws pass through the threaded through holes and abut against the support grooves of the pad, forming a gap L1 between the pad and the inner wall of the baffle; the connecting screws pass through the threaded through holes and connect to the pad through the connecting through holes, fixing the pad to the inner walls of the two baffles;

[0009] The guide key includes a second base plate and a connecting key disposed on one side of the second base plate. The connecting key is installed in the connecting groove, and a gap L2 is formed between the connecting key and the two pads respectively. A gap L is formed between the end of the connecting key and the bottom of the connecting groove. The other side of the first base plate is fixedly installed on the housing of the first stator or the housing of the second stator, and the other side of the second base plate is fixedly installed on the housing of the second stator or the housing of the first stator.

[0010] Furthermore, the tail end of the support screw is a smooth cylindrical body that abuts against the support groove; the support screw is also connected to a nut and a stop washer, the stop washer being a stop L-shape and fitting against the corner of the baffle to prevent the support screw from moving.

[0011] Furthermore, the gap L1 is 1.5mm; the gap L2 between the two sides of the connecting key and the two pads is 0.01~0.04mm, and the sum of the two L2 is 0.05mm.

[0012] Furthermore, the threaded through hole includes a first through hole, a second through hole, and a third through hole, with the third through hole located between the first through hole and the second through hole;

[0013] The supporting groove includes a first groove corresponding to the first through hole and a second groove corresponding to the second through hole, and the connecting through hole includes a fourth through hole corresponding to the third through hole;

[0014] After the two support screws pass through the first through hole and the second through hole respectively, they abut against the first groove and the second groove. The length of the support screw is greater than the sum of the total length of the first through hole and the first groove and the gap L1.

[0015] The connecting screw passes through the third through hole and is connected to the washer through the fourth through hole.

[0016] Furthermore, both the first base plate and the second base plate are provided with multiple fixing screw holes on their sides, which are used to fix the other side of the first base plate and the other side of the second base plate to the housing of the first stator or the box of the second stator respectively by bolts.

[0017] Furthermore, a positioning boss is provided on the other side of the first base plate, which corresponds to the positioning groove provided on the housing of the first stator or the box of the second stator, so as to realize the connection and positioning of the first base plate with the first stator or the second stator.

[0018] A positioning boss is provided on the other side of the second base plate, which corresponds to the positioning groove provided on the second stator or the first stator housing, so as to realize the connection and positioning of the second base plate with the second stator or the first stator.

[0019] A method for connecting a spliced ​​stator, based on the aforementioned large-scale equipment with a spliced ​​stator, is characterized by the following steps:

[0020] 1) Install the first base plate of the guide rail on the housing of the first stator or the box of the second stator to axially position the guide rail;

[0021] 2) Install the second base plate of the guide key onto the housing of the second stator or the housing of the first stator to axially position the guide key;

[0022] 3) Roughly adjust the relative positions of the first stator and the second stator, place the connecting key on the guide key into the connecting groove on the guide rail, and make a gap L between the end of the connecting key and the bottom of the connecting groove;

[0023] 4) Install and fine-tune the support screws and connecting screws on the two baffles to form a gap L1 between the pad and the inner wall of the baffle, and a gap L2 between the two pads and the side of the connecting key, thus completing the splicing of the first stator and the second stator of the large equipment.

[0024] Further, step 4) specifically includes:

[0025] 4.1) Install the connecting screws and connect the washer to the connecting screws;

[0026] 4.2) Install and adjust the support screws, and at the same time adjust the connecting screws to form a gap L1 between the pad and the inner wall of the baffle, and fix the pad to the inner wall of the baffle by the connecting screws. At this time, a gap L2 is formed between the two pads and the side of the connecting key, and the pads are fixed with nuts and locking washers.

[0027] Furthermore, in steps 1) and 2), bolts are used to pass through the fixing screw holes on the first base plate and the second base plate to fix the first base plate and the second base plate to the first stator or the second stator.

[0028] Compared with the prior art, the beneficial effects of the present invention are:

[0029] 1. The present invention relates to a large-scale equipment with a spliced ​​stator, which adopts a spliced ​​stator structure, including two independent components on the large-scale equipment, namely a first stator and a second stator. The first stator is provided with a guide rail, and the second stator is provided with a guide key. The first stator and the second stator are spliced ​​together by the cooperation of the protruding connecting key on the guide key and the concave connecting groove on the guide rail, so as to provide a precise support position for the rotor and thus realize the safe operation of the rotating equipment.

[0030] 2. In large equipment with a modular stator, the gap L1 is adjusted by adjusting the support screws. After the support screws are adjusted to the appropriate position, they are fixed by a nut and a retaining washer. The retaining washer is L-shaped, located between the nut and the baffle, and installed to fit the corner of the baffle. To ensure a tight fit between the support screw and the support groove while maintaining a certain effective gap, the tail of the support screw is not threaded and passes through the support groove.

[0031] 3. In this invention, for large equipment with a spliced ​​stator, the width of the connecting key is smaller than the width of the connecting groove, ensuring a small radial gap between the connecting key and the connecting groove. This radial gap directly affects the radial gap between the rotor and bearings of the large equipment, thus ensuring the normal operation of the rotor and bearings.

[0032] 4. In the splicing stator connection method of the present invention, after the first stator and the second stator are spliced, the size of the gap L1 can be directly adjusted by adjusting the support bolts. By controlling the gap L1, the size of the sum of the two gaps L2 can be indirectly controlled, thereby achieving precise adjustment of the sum of the two gaps L2.

[0033] 5. The connection method of the spliced ​​stator of the present invention has a total gap L2 of 0.05mm, which can achieve precise positioning of the rotor. If the gap L2 is too large, the positioning effect cannot be achieved well, and the rotor may be radially offset when rotating around the central axis, thus affecting the normal operation of large equipment; if the gap L2 is too small, there are difficulties in processing and installation.

[0034] 6. In the splicing stator connection method of the present invention, when the first stator and the second stator are spliced, a gap L is left between the end of the connecting key and the bottom of the connecting groove, so as to leave thermal expansion margin for the parts in the axial direction when the equipment is running, and to ensure the stable and safe operation of the equipment. Attached Figure Description

[0035] Figure 1 This is a structural schematic diagram of a large equipment embodiment of the present invention with a spliced ​​stator (support screws and connecting screws are not shown).

[0036] Figure 2 This is a structural schematic diagram of a large-scale equipment embodiment of the present invention with a spliced ​​stator (second base plate not shown).

[0037] Figure 3 This is a schematic diagram of the structure of one side of the guide rail in an embodiment of the large equipment with a spliced ​​stator of the present invention;

[0038] Figure 4 This is a schematic diagram of the support screw structure in an embodiment of the present invention for a large equipment with a spliced ​​stator;

[0039] Figure 5 This is a schematic diagram of the connection status of a large equipment embodiment with a spliced ​​stator according to the present invention.

[0040] Figure 6 for Figure 5 A magnified view of a portion of the image;

[0041] Explanation of reference numerals in the attached figures:

[0042] 1. First stator; 2. Second stator; 3. Guide rail; 31. First base plate; 32. Fixing screw hole; 33. Baffle; 34. Connecting groove; 35. First through hole; 36. Second through hole; 37. Third through hole; 38. Support screw; 381. Nut; 382. Stop washer; 39. Connecting screw; 4. Pad; 41. First groove; 42. Second groove; 43. Fourth through hole; 5. Guide key; 51. Second base plate; 52. Connecting key; 6. Rotor. Detailed Implementation

[0043] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0044] A large piece of equipment with a modular stator, such as Figure 5As shown, the system includes a rotor 6 and a first stator 1 that cooperates with the rotor 6, as well as a second stator 2 and a bearing mounted on the second stator 2. The rotor 6 is connected to the second stator 2 via the bearing. A guide rail 3 is provided on the first stator 1 or the second stator 2, and a guide key 5 corresponding to the guide rail 3 is provided on the second stator 2 or the first stator 1. In this embodiment, the guide rail 3 is connected to the housing of the first stator, and the guide key 5 is connected to the housing of the second stator 2.

[0045] like Figure 1 As shown, the guide rail 3 includes a first base plate 31 and a guide rail. The guide rail is disposed on one side of the first base plate 31, and a circular positioning boss is disposed on the other side of the first base plate 31. A circular positioning groove adapted to the circular boss is disposed on the housing of the first stator 1. Multiple fixing screw holes 32 are disposed on each of the two sides of the first base plate 31. In this embodiment, four fixing screw holes 32 are disposed on each of the two sides of the first base plate 31. The guide rail includes two baffles 33 disposed opposite to and perpendicular to the base plate. A pad 4 is disposed on the inner wall of each of the two baffles 33. A connecting groove 34 is formed between the two pads 4. Both ends of the connecting groove 34 are open. The length of the pad 4 is less than the length of the baffle 33.

[0046] like Figure 3 As shown, in this embodiment, each of the two baffles 33 is provided with three threaded through holes, which are distributed along the length of the baffle 33 and are respectively a first through hole 35, a third through hole 37, and a second through hole 36. The third through hole 37 is located between the first through hole 35 and the second through hole 36. Each pad 4 is provided with a first groove 41 and a second groove 42 on the side near the inner wall of the baffle 33, which are respectively corresponding to the first through hole 35 and the second through hole 36. The pad 4 is also provided with a fourth through hole 43 located between the first groove 41 and the second groove 42. The fourth through hole 43 is a threaded through hole and corresponds to the position of the third through hole 37.

[0047] After the support screw 38 passes through the first through hole 35 and the second through hole 36 respectively, it abuts against the first groove 41 and the second groove 42 on the pad 4, forming a gap L1 of 1.5 mm between the pad 4 and the inner wall of the baffle 33. The length of the support screw 38 is greater than the sum of the total length of the first through hole 35 and the first groove 41 and the gap L1. Figure 4As shown, the tail of the support screw 38 is unthreaded and has a smooth surface. The tail of the support screw 38 is connected to the support groove; the support screw 38 is also connected to a nut 381 and a retaining washer 382. The retaining washer 382 is L-shaped and located between the nut 381 and the baffle 33, fitting against the corner of the baffle 33. The size of the gap L1 is adjusted by adjusting the position of the support screw 38. After the support screw 38 is adjusted to the appropriate position, it is fixed by the nut 381 and the retaining washer 382. The connecting screw 39 is used to pass through the third through hole 37 on the baffle 33 and the fourth through hole 43 on the pad 4 to fix the pad 4 to the inner wall of the baffle 33.

[0048] like Figure 1 As shown, the guide key 5 includes a second base plate 51 and a connecting key 52. ​​The connecting key 52 is disposed on one side of the second base plate 51, and a circular positioning boss is disposed on the other side of the second base plate 51. A circular positioning groove adapted to the circular positioning boss is disposed on the housing of the second stator 2. Multiple fixing screw holes 32 are disposed on each of the two sides of the second base plate 51. In this embodiment, three fixing screw holes 32 are disposed on each of the two sides of the second base plate 51. The connecting key 52 is located on the other side of the second base plate 51 and is installed in the connecting groove 34. The width of the connecting key 52 is smaller than the width of the connecting groove 34. A gap L2 is formed between the connecting key 52 and each of the two pads 4, and the sum of the two L2s is 0.05 mm. A gap L is formed between the end of the connecting key 52 and the bottom of the connecting groove 34.

[0049] A method for connecting a spliced ​​stator includes the following steps:

[0050] 1) Install the circular positioning boss on the first base plate 31 into the circular positioning groove on the housing of the first stator 1 to axially position the guide rail 3; use bolts to pass through the fixing screw holes 32 on the first base plate 31 to fasten the guide rail 3 onto the housing of the first stator 1 through the first base plate 31.

[0051] 2) Install the circular positioning boss on the second base plate 51 into the circular positioning groove on the second stator 2 housing to axially position the guide key 5; use bolts to pass through the fixing screw holes 32 on the second base plate 51 to fasten the guide key 5 onto the second stator 2 housing through the second base plate 51.

[0052] 3) Roughly adjust the relative positions of the first stator 1 and the second stator 2 so that the guide key 5 is aligned with the guide rail 3. Place the connecting key 52 on the guide key 5 in the connecting groove 34 on the guide rail 3, and form a gap L between the end of the connecting key 52 and the bottom of the connecting groove 34 to allow for thermal expansion of the parts in the axial direction when the equipment is running.

[0053] 4) such as Figure 2As shown, the installation and precise adjustment of the support screws 38 and connecting screws 39 on the two baffles 33 specifically includes the following steps:

[0054] 4.1) Install connecting screw 39 and connect the washer 4 to connecting screw 39;

[0055] 4.2) Install and adjust the support screws 38, and simultaneously adjust the connecting screws 39, so that a gap L1 is formed between the pad 4 and the inner wall of the baffle 33, and the pad 4 is fixed to the inner wall of the baffle 33 by the connecting screws 39. At this time, a gap L2 is formed between the two pads 4 and the side of the connecting key 52, respectively, and is fixed by using nuts 381 and stop washers 382. This completes the precise splicing of the first stator 1 and the second stator 2 of the large equipment.

[0056] The width of the connecting key 52 is smaller than the width of the connecting groove 34, therefore, a gap L2 is left between the two sides of the connecting key 52 and the two pads respectively. The size of the gap L1 can be directly controlled by adjusting the support screw 38, and the gap L1 can indirectly control the sum of the two gaps L2, thereby achieving precise adjustment of the sum of the two gaps L2. The sum of the gaps L2 is 0.05mm, which can achieve precise positioning of the rotor 6. If the gap L2 is too large, accurate positioning cannot be achieved, and the rotor 6 may experience radial displacement when rotating around the central axis, thus affecting the normal operation of large equipment; if the gap L2 is too small, on the one hand, there are difficulties in processing and installation, and on the other hand, it directly affects the clearance between the rotor 6 and the bearing, and friction may occur when the rotor 6 runs through the bearing.

[0057] like Figure 5 , Figure 6 As shown, by setting a spliced ​​stator on large equipment, accurate positioning and support are provided for the rotor 6. At the same time, a certain margin is required in the connection between the first stator 1 and the second stator 2 to prevent small displacements from causing damage to the large equipment during operation. Therefore, this invention leaves a certain gap when connecting the guide key 5 and the guide rail 3. The gap can be adjusted by the connecting screw 39 and the support screw 38, thereby meeting the requirements of large equipment for the accuracy and adjustability of the stator connection.

Claims

1. A large device with a spliced ​​stator, comprising a rotor (6) and a first stator (1) cooperating with the rotor (6), further comprising a second stator (2) and bearings mounted on the second stator (2), wherein the rotor (6) is connected to the second stator (2) via the bearings; characterized in that: The first stator (1) or the second stator (2) is provided with a guide rail (3), and the second stator (2) or the first stator (1) is provided with a guide key (5) corresponding to the guide rail (3); The guide rail (3) includes a first base plate (31) and a guide rail disposed on one side of the first base plate (31). The guide rail includes two baffles (33) disposed opposite to and perpendicular to one side of the first base plate (31) and two pads (4). The two pads (4) are respectively disposed on the inner walls of the two baffles (33); a connecting groove (34) is formed between the two pads (4). Each of the baffles (33) has multiple threaded through holes distributed along its length for passing through support screws (38) or connecting screws (39); the pad (4) is provided with support grooves and connecting through holes corresponding to the positions of the threaded through holes; the support screws (38) pass through the threaded through holes and abut against the support grooves of the pad (4), forming a gap L1 between the pad (4) and the inner wall of the baffle (33); the connecting screws (39) pass through the threaded through holes and are connected to the pad (4) through the connecting through holes, fixing the pad (4) on the inner wall of the two baffles (33); The guide key (5) includes a second base plate (51) and a connecting key (52) disposed on one side of the second base plate (51). The connecting key (52) is installed in the connecting groove (34), and the connecting key (52) forms a gap L2 with the two pads (4) respectively. The end of the connecting key (52) forms a gap L with the bottom of the connecting groove (34). The other side of the first base plate (31) is fixedly installed on the housing of the first stator (1) or the box of the second stator (2). The other side of the second base plate (51) is fixedly installed on the box of the second stator (2) or the housing of the first stator (1).

2. The large-scale equipment with a spliced ​​stator according to claim 1, characterized in that: The tail end of the support screw (38) is a smooth column that abuts against the support groove; the support screw (38) is also connected to a nut (381) and a stop washer (382). The stop washer (382) is a stop L-shaped piece that fits against the corner of the baffle (33) to prevent the support screw (38) from moving.

3. The large-scale equipment with a spliced ​​stator according to claim 1, characterized in that: The gap L1 is 1.5mm; the sum of the two gaps L2 between the two sides of the connecting key (52) and the two pads (4) is 0.05mm.

4. The large-scale equipment with a spliced ​​stator according to claim 1, 2, or 3, characterized in that: The threaded through hole includes a first through hole (35), a second through hole (36) and a third through hole (37), with the third through hole (37) located between the first through hole (35) and the second through hole (36); The supporting groove includes a first groove (41) corresponding to the first through hole (35) and a second groove (42) corresponding to the second through hole (36), and the connecting through hole includes a fourth through hole (43) corresponding to the third through hole (37). After the two support screws (38) pass through the first through hole (35) and the second through hole (36) respectively, they abut against the first groove (41) and the second groove (42). The length of the support screw (38) is greater than the sum of the total length of the first through hole (35) and the first groove (41) and the gap L1. The connecting screw (39) passes through the third through hole (37) and is connected to the pad (4) through the fourth through hole (43).

5. The large-scale equipment with a spliced ​​stator according to claim 4, characterized in that: The first base plate (31) and the second base plate (51) are provided with multiple fixing screw holes (32) on their sides, which are used to fix the other side of the first base plate (31) and the other side of the second base plate (51) to the housing of the first stator (1) or the box of the second stator (2) respectively by bolts.

6. The large-scale equipment with a spliced ​​stator according to claim 5, characterized in that: A positioning boss is provided on the other side of the first base plate (31) to correspond to the positioning groove provided on the housing of the first stator (1) or the box of the second stator (2) to realize the connection and positioning of the first base plate (31) with the first stator (1) or the second stator (2); A positioning boss is provided on the other side of the second base plate (51) to correspond to the positioning groove provided on the housing of the second stator (2) or the first stator (1) to realize the connection and positioning of the second base plate (51) and the second stator (2) or the first stator (1).

7. A method for connecting a spliced ​​stator, based on a large-scale equipment with a spliced ​​stator as described in any one of claims 1-6, characterized in that: Includes the following steps: 1) Install the first base plate (31) of the guide rail (3) on the housing of the first stator (1) or the box of the second stator (2) to axially position the guide rail (3); 2) Install the second base plate (51) of the guide key (5) on the housing of the second stator (2) or the housing of the first stator (1) to axially position the guide key (5); 3) Roughly adjust the relative positions of the first stator (1) and the second stator (2), place the connecting key (52) on the guide key (5) in the connecting groove (34) on the guide rail (3), and make a gap L between the end of the connecting key (52) and the bottom of the connecting groove (34); 4) Install and fine-tune the support screws (38) and connecting screws (39) on the two baffles (33) so that a gap L1 is formed between the pad (4) and the inner wall of the baffle (33) and a gap L2 is formed between the two pads (4) and the side of the connecting key (52) respectively, thus completing the splicing of the first stator (1) and the second stator (2) of the large equipment.

8. The connection method of the spliced ​​stator according to claim 7, characterized in that: Step 4) specifically includes: 4.1) Install the connecting screw (39) and connect the washer (4) to the connecting screw (39); 4.2) Install and adjust the support screws (38) and adjust the connecting screws (39) to form a gap L1 between the pad (4) and the inner wall of the baffle (33), and fix the pad (4) to the inner wall of the baffle (33) by the connecting screws (39). At this time, the two pads (4) form a gap L2 between the two pads and the side of the connecting key (52), and fix them with nuts (381) and stop washers (382).

9. The connection method of the spliced ​​stator according to claim 8, characterized in that: In steps 1) and 2), bolts are used to pass through the fixing screw holes (32) on the first base plate (31) and the second base plate (51) to fix the first base plate (31) and the second base plate (51) onto the first stator (1) or the second stator (2).

Images