Wet winding pump model and wet winding pump pre-installation simulation method

Abstract

The present invention relates to a wet winding pump model, comprising: an idler part; a main flange part; a motor part; a lower bearing part; and a main shaft, wherein: the idler part, the main flange part, the motor part, and the lower bearing part are sequentially arranged along the main shaft to form a cylindrical stepped structure. At least one of the idler part, the main flange part, the motor part, and the lower bearing part is a hollow cylinder with a cavity formed inside. The present invention also relates to a wet winding pump pre-installation simulation method, comprising the steps of: using the above-mentioned wet winding pump model to test: the matching of the wet winding pump transport tooling or trolley with the wet winding pump, or the matching of the wet winding pump transport installation channel with the wet winding pump. The method may also include the steps of: changing or selecting the structure or structural parameters of the wet winding pump transport tooling based on the test results; or the structure or structural parameters of the wet winding pump transport installation channel.

Description

Technical Field

[0001] The embodiments of the present invention relate to the field of nuclear power plant design and manufacturing, and in particular to a wet winding pump model and a wet winding pump pre-installation simulation method using the model. Background Art

[0002] At present, before the installation of a third-generation nuclear power wet winding pump, due to the lack of a verification tool that is similar to the appearance of the wet winding pump, it is impossible to verify the feasibility of the wet winding pump transportation channel and installation verification. Therefore, during the actual transportation and installation of the wet winding pump, the channel was blocked, affecting the actual installation work.

[0003] In addition, due to the lack of corresponding verification tools, in the design of the wet winding pump transportation channel, it is impossible to conduct actual verification of the transportation and installation channel in advance, resulting in the inability to discover design problems in advance and the design documents cannot be upgraded and improved accordingly.

[0004] Moreover, during the secondary transportation of the wet winding pump, due to the lack of corresponding simulation verification tools for preliminary test verification, the matching problem between the transport tooling and the wet winding pump could not be discovered and improved in time during the actual secondary transportation of the wet winding pump, which had an adverse impact on the actual transportation work of the wet winding pump.

[0005] In addition, before the wet winding pump was officially installed, due to the lack of corresponding simulation installation practice tools for pre-installation practice, the workers did not fully grasp the installation technical difficulty of this type of new pump, which affected the actual installation work.

[0006] Due to the lack of corresponding simulation verification equipment, the practical matching problems between the wet winding pump installation cart and the wet winding pump could not be discovered and improved in advance, resulting in the wet winding pump and the cart not being well matched during the actual installation operation of the wet winding pump, affecting the installation work. Summary of the invention

[0007] The present invention is proposed to alleviate or solve at least one of the above problems.

[0008] An embodiment of the present invention proposes a wet winding pump model, comprising:

[0009] Idler gear part;

[0010] Main flange;

[0011] Motor Department;

[0012] a lower bearing portion; and

[0013] Spindle,

[0014] in:

[0015] The idler wheel part, the main flange part, the motor part, and the lower bearing part are sequentially arranged along the main shaft to form a cylindrical stepped structure. Optionally, at least one of the idler wheel part, the main flange part, the motor part, and the lower bearing part is a hollow cylinder with a cavity formed inside.

[0016] Optionally, the model further includes a guide outlet portion, and at least one of the guide outlet portion, the idler portion, the main flange portion, the motor portion, and the lower bearing portion is a hollow cylinder with a cavity formed inside.

[0017] Optionally, the lower bearing portion includes a lower radial bearing portion and a thrust bearing portion; the outlet portion, idler portion, main flange portion, motor portion, lower radial bearing portion, and thrust bearing portion are sequentially arranged along the main shaft to form a cylindrical stepped structure.

[0018] Optionally, the model also includes an end cover portion; and the outlet portion, idler portion, main flange portion, motor portion, lower radial bearing portion, thrust bearing portion, and end cover portion are sequentially arranged along the main axis to form a cylindrical stepped structure.

[0019] Optionally, at least one of the outlet portion, the idler portion, the main flange portion, the motor portion, the lower radial bearing portion, the thrust bearing portion, and the end cover portion is a hollow cylinder with a cavity formed inside.

[0020] Optionally, the outlet portion, the idler portion, the main flange portion, the motor portion, the lower radial bearing portion, the thrust bearing portion, and the end cover portion are all hollow cylinders with a cavity formed inside.

[0021] Optionally, a connecting flange portion is provided on an outer circumferential surface of at least one of the idler portion and the end cover portion.

[0022] Optionally, the main shaft is a stepped main shaft, or the main shaft is a main shaft with a constant outer diameter.

[0023] Optionally, the main shaft is a stepped main shaft and has a large diameter portion, a first neck portion, a second neck portion and a third neck portion located above the large diameter portion and connected to the large diameter portion in sequence, and a fourth neck portion, a fifth neck portion and a sixth neck portion located below the large diameter portion and connected to the large diameter portion in sequence; and the main flange portion is arranged on the large diameter portion, the idler portion is arranged on the first neck portion, the outlet portion is arranged on the second neck portion and the third neck portion, the motor portion is arranged on the fourth neck portion, the lower radial bearing portion is arranged on the fifth neck portion, and the thrust bearing and the end cover portion are arranged on the sixth neck portion. Further optionally, the outer diameters of the first neck portion, the second neck portion and the third neck portion decrease in sequence; and the outer diameters of the fourth neck portion, the fifth neck portion and the sixth neck portion decrease in sequence.

[0024] Optionally, the cross-section of the main shaft is generally circular; and a keyway fitting structure is provided between the corresponding portion of the main shaft and at least one end face or inner wall surface of the outlet portion, the idler portion, the main flange portion, the motor portion, the lower radial bearing portion, the thrust bearing portion, and the end cover portion.

[0025] Optionally, the cross-section of the main shaft is polygonal; and a corresponding part of the main shaft has a profile fitting structure with at least one end face or inner wall surface of the outlet portion, idler portion, main flange portion, motor portion, lower radial bearing portion, thrust bearing portion, and end cover portion.

[0026] Optionally, the upper surface of the idler portion is provided with a boss suitable for cooperating with the pump casing. An embodiment of the present invention also proposes a wet winding pump pre-installation simulation method, comprising the steps of: using the above-mentioned wet winding pump model to test: the matching of the wet winding pump transport tooling or trolley with the wet winding pump, or the matching of the wet winding pump transport installation channel with the wet winding pump. Further, the above-mentioned method also includes the steps of: changing or selecting the structure or structural parameters of the wet winding pump transport tooling based on the test results; or the structure or structural parameters of the wet winding pump transport installation channel. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A three-dimensional schematic diagram of a wet winding pump model according to an exemplary embodiment of the present invention;

[0028] Figure 2 for Figure 1 The structural diagram of the wet winding pump model in FIG.

[0029] Figure 3 for Figure 2 Schematic diagram of the main axis in;

[0030] Figure 4 for Figure 2 Schematic diagram of the main flange in FIG.

[0031] Figure 5 for Figure 2 Schematic diagram of the motor part;

[0032] Figure 6 for Figure 2 A schematic diagram of the lower radial bearing portion;

[0033] Figure 7 for Figure 2 A schematic diagram of the lower radial bearing portion;

[0034] Figure 8 for Figure 2 A schematic diagram of the end cover portion;

[0035] Fig. 9 for Figure 2 A schematic diagram of the idler wheel portion;

[0036] Fig.10 for Figure 2 A schematic diagram of the upper section of the outlet portion;

[0037] Fig.11 for Figure 2 Schematic diagram of the lower section of the outlet portion. DETAILED DESCRIPTION

[0038] The technical solution of the present invention is further specifically described below by examples and in conjunction with the accompanying drawings. In the specification, the same or similar reference numerals indicate the same or similar components. The following description of the embodiments of the present invention with reference to the accompanying drawings is intended to explain the overall inventive concept of the present invention and should not be construed as a limitation of the present invention.

[0039] The wet winding pump model of the present invention is mainly a spatial utilization of the body contour of the wet winding pump. By using the wet winding pump model, simulation tests of the wet winding pump installation channel, simulation tests of the wet winding pump secondary transportation, debugging and verification of the wet winding pump installation trolley, and simulated installation of the wet winding pump can be carried out, so as to be familiar with the performance of the wet winding pump, practice and master the key installation techniques of the wet winding pump, and through experiments, various problems arising in the installation can be discovered, identified and solved in advance, ensuring the success of the wet winding pump secondary transportation, channel transportation, wet winding pump installation trolley debugging and formal installation, thereby improving the on-site construction efficiency, reducing costs and shortening the construction period.

[0040] In an exemplary embodiment of the present invention, the wet winding pump model may be designed as follows:

[0041] (1) Since the pump casing is delivered to the site as a whole with the steam generator, the suction duct is first installed into the pump casing, and then the pump impeller and the outlet pipe are inserted into the pump casing together, and the main flange is tightened. The pump casing and the suction duct have a relatively simple structure and low installation technical difficulty. The pump casing and the suction duct have no effect on the wet winding pump channel test, installation simulation test, and matching test of various tooling. Therefore, the pump suction duct and pump casing model are no longer designed and manufactured.

[0042] (2) The impeller of the wet winding pump is completely contained inside the pump liquid outlet. The impeller has no effect on the wet winding pump channel test, installation simulation test, and matching test of various tooling. Various on-site simulation tests only require the external contour of the outlet. Therefore, when designing the on-site model, only the external contour of the outlet is simulated and manufactured, without considering its internal structure and the impeller contained inside. The outlet is designed as a stepped cylindrical component with an axial hole and a pin hole in the middle of the end face.

[0043] (3) The idler wheel, main flange, motor, lower radial bearing and thrust bearing of the wet winding pump model only need to be close to the external contour of the real wet winding pump, and its internal structure does not have to be consistent with the real wet winding pump. In order to facilitate manufacturing, reduce costs, and meet the requirements of field tests, the internal structure of the outlet, idler wheel, main flange, motor, lower radial bearing and thrust bearing is simplified, that is, designed as a cavity structure.

[0044] (4) Combined with the manufacturing drawings of the real wet winding pump, and considering the requirements of meeting the needs of the field test, simplifying the manufacturing difficulty, and reducing the cost, the outlet, idler, main flange, motor, lower radial bearing and thrust bearing of the wet winding pump model are designed to be stepped cylindrical. The sealing plates at both ends of each cylindrical segment have circular holes and key holes in the middle, and match them with the full-length main shaft. The structure of each cylindrical segment only needs to meet its own weight and the strength required for the field test, and does not need to be consistent with the shape strength of the real wet winding pump.

[0045] (5) The model uses a full-length main shaft, and the journal and the key are matched with the size of the openings on the end faces of the cylindrical segments of the model. Finally, the cylindrical segments are sleeved on the main shaft in a certain order to form the whole model, and the cylindrical segments are welded and fixed. This is also one of the biggest differences from the manufacturing and assembly of the real wet winding pump.

[0046] (6) Each key component of the model is designed to be cylindrical, with a round hole and a key hole on its end face. These key components are mounted on the main shaft, and finally the key components are welded and fixed to form the main body of the wet winding pump model.

[0047] (7) The non-critical parts of the wet-winding pump model, such as the motor terminal box, cooling water pipe and flange, are only required to be consistent with the real wet-winding pump in shape and have a certain strength. No requirements are made for other performance and internal structure, and they do not need to be consistent with the real wet-winding pump.

[0048] like Figure 1-2 As shown in the figure, the wet winding pump model is based on the wet winding pump manufacturing drawings, combined with the needs of the secondary handling, channel transportation and installation process of the wet winding pump to determine the technical requirements and performance parameters of the model. Its purpose is to provide a special tool to achieve at least one of the secondary handling, channel transportation, simulation installation verification and adjustment of the wet winding pump installation trolley.

[0049] like Figure 1-2As shown, the entire wet winding pump model is generally cylindrical, and its outlet portion 1, idler portion 2, main flange portion 3, motor portion 4, lower radial bearing portion 5, and thrust bearing portion 6 are all arranged coaxially with the main shaft 8, but the diameters of each part are different. The outer contour of the entire wet winding pump model is generally presented as cylinders of different diameters stacked along the same axis, presenting columnar steps of different diameters.

[0050] In the present invention, the upper part and the lower part refer to the part above the main flange or the main flange when the wet winding pump or the wet winding pump model is installed in place, and the part below the main flange is the lower part. It is just an expression of a relative position relationship.

[0051] in addition, Figure 1-2 Also shown are the end cover 7 and the shaft key 9.

[0052] like Figure 1-2 As shown, the upper surface of the idler wheel portion is provided with a boss suitable for cooperating with the pump housing. The general idea of ​​making a wet winding pump model is described below by way of example.

[0053] First, according to the outer diameter of the main flange of the wet winding pump, the outer diameter of the idler pulley, the outer diameter of the outlet, the outer diameter of the motor housing below the main flange, the lower axial bearing housing, the lower thrust bearing housing and the thrust bearing end flange, a full-length main shaft 8 is designed and manufactured to fix the columnar model parts. Figure 3 In the present invention, in addition to using a keyway matching structure, although not shown, the fixation between the main shaft and the corresponding model part can also be achieved in the following manner: the cross section of the main shaft is a polygon; and the corresponding part of the main shaft and at least one end face or inner wall surface of the corresponding model part have a profile matching structure. In one embodiment, Figure 3 As shown in the figure, the main shaft diameter is φ125mm at the neck corresponding to the main flange, and φ60mm at the neck corresponding to the outlet (i.e., the impeller). The neck corresponding to the main flange is divided into 3 sections above, with the diameters of φ100, φ80, and φ60 respectively; the neck below is divided into 3 sections, with the diameters of φ100, φ80, and φ60 respectively. Figure 1 and Figure 3 As shown, each shaft neck has a corresponding keyway and is equipped with a key, and the shaft and key adopt the national standard.

[0054] Secondly, according to the outer diameters and lengths of the main flange, idler wheel, outlet, motor housing under the main flange, lower radial bearing housing, thrust bearing and bearing end cover flange, a cylindrical model with corresponding outer diameter and length is made.

[0055] Finally, these cylinders are mounted on the main shaft, and the columnar model parts can be connected by welding to form a cylindrical stepped structure.

[0056] The cylinder here can be made of steel pipe, and the two ends are sealed by welding with steel plates. The middle of the steel plate is provided with an axial hole and keyway matching the size of the shaft neck. The processing accuracy of the axial hole and keyway adopts national standards and can cooperate well with the main shaft.

[0057] The specific steel plate welding groove adopts a 45° groove, and the weld height is flush with the outside of the steel plate. Generally, the plate thickness can be used (except for the main flange). After welding, the entire end face and the outer cylindrical surface of the steel pipe can be fine-machined with a machining accuracy of ±0.05mm (except for special instructions in the following steps) to ensure the cylindricality and end face flatness of each section of the model. The surface machining roughness is 6.3μm (except for special instructions in the following steps). Each component of the simulation part uses Q235B or Q345B steel, and the welding material uses E7018φ3.2 welding rod, and manual arc welding is used.

[0058] During the specific production, the main flange part 3 is used as the boundary (the upper radial bearing is arranged inside the main flange of the wet winding pump), and its lower end is divided into the motor part 4, the lower radial bearing part 5, the thrust bearing part 6, and the end cover part 7, which are produced in sequence. The upper end of the main flange part 3 is divided into the idler part 2 and the outlet part 1, which are produced in sequence.

[0059] Next, the production of the main shaft 8 will be described.

[0060] exist Figure 3 In the exemplary embodiment shown, the total length of the main shaft 8 is 6546 mm, and the shaft diameter is the largest at the shaft neck portion corresponding to the main flange portion, which is the large diameter portion 80, with a shaft diameter of φ125 mm and a length of 434 mm.

[0061] The shaft diameters of the journal portion 81 corresponding to the idler portion above the large diameter portion 80 and the journal portions 82 and 83 corresponding to the outlet portion are φ100mm, φ80mm, φ60mm, respectively, and the lengths are 1385mm, 362mm, 548mm, respectively.

[0062] The shaft diameter of the neck portion 84 corresponding to the motor part below the main flange part is φ100mm, the shaft diameter of the neck portion 85 corresponding to the lower radial bearing part is φ80mm, and the shaft diameter of the neck portion 86 corresponding to the thrust bearing part and the end cover part at the lower end is φ60mm. The lengths of the neck portions 84, 85, and 86 are 2781mm, 369mm, and 665mm, respectively.

[0063] The size of the keyway and key on the neck should be selected according to the mechanical manufacturing manual and the national standard. The spindle is processed according to the processing accuracy of general mechanical manufacturing, and can be assembled reliably and bear the weight of the model itself. The straightness of the spindle processing is ±0.05mm and the roughness is 3.2μm.

[0064] When the main shaft is manufactured, the diameter and length corresponding to the corresponding part of the wet winding pump can be selected.

[0065] from Figure 3 It can be seen that, accordingly, the main shaft 8 is a stepped main shaft and has a large diameter portion 80, a first neck portion 81, a second neck portion 82 and a third neck portion 83 located above the large diameter portion and sequentially connected to the large diameter portion, and a fourth neck portion 84, a fifth neck portion 85 and a sixth neck portion 86 located below the large diameter portion and sequentially connected to the large diameter portion. The main flange portion is provided at the large diameter portion 80, the outlet portion is provided at the second and third neck portions 82, 83, the idler portion is provided at the first neck portion 81, and the motor portion, the lower radial bearing portion and the thrust bearing portion are provided at the fourth neck portion 84, the fifth neck portion 85 and the sixth neck portion 86, respectively.

[0066] like Figure 3 As shown, the outer diameters of the first journal portion 81 , the second journal portion 82 and the third journal portion 83 decrease in sequence; and the outer diameters of the fourth journal portion 84 , the fifth journal portion 85 and the sixth journal portion 86 decrease in sequence.

[0067] The production of the main flange portion will be described below. Figure 4 for Figure 2 Schematic diagram of the main flange in.

[0068] The journal (large diameter portion) of the main shaft 8 corresponding to the main flange portion 3 has a corresponding length and diameter.

[0069] The shaft diameter of the large diameter part corresponding to the main flange part 3 is φ125mm and the length is 434mm. The outer diameter of the main flange part matching it is φ2150mm. The end surface processing, bolt hole arrangement and processing accuracy of the main flange part can be equivalent to the actual wet winding pump flange processing accuracy, that is, ±0.05mm.

[0070] The main flange is made of a steel pipe with a diameter of φ2150mm and a wall thickness of δ20mm. The end plates with a corresponding wall thickness of δ36mm are made at both ends of the steel pipe. There are 24 through holes 31 with a diameter of φ135mm for the main bolts, and the circle diameter of the main bolt hole center is φ1915mm. Its layout and processing accuracy are the same as the main flange. The center of the end plate is processed with an axial hole 32 with a diameter of φ125mm and a keyway 33. The end plate and the steel pipe are fixed by welding. The weld can be a V-shaped 45° groove with a weld height of 18mm. The flatness of both ends of the main flange is ±0.05mm, and the roundness of the outer circle of the steel pipe is ±0.05mm.

[0071] The production of the motor portion will be described below. Figure 5 for Figure 2 Schematic diagram of the motor part.

[0072] The motor part 4 is located below the main flange part 3. The corresponding journal on the main shaft has a corresponding length and diameter. The journal diameter is φ100mm and the length is 2781mm. The two ends of the journal on the main shaft may have corresponding keyways and keys. The motor part 4 is made of a steel pipe with a wall thickness of δ16mm, a diameter of φ1240mm and a length of 2781mm. Blind plates (end plates) with a wall thickness of δ=16m may be set at both ends of the steel pipe. A central shaft hole 41 with a diameter of φ110mm and a keyway 42 are opened in the middle of the blind plate, and they match the corresponding parts on the main shaft. The end plate and the steel pipe are connected by welding.

[0073] The production of the lower radial bearing portion will be described below. Figure 6 for Figure 2 Schematic diagram of the lower radial bearing portion.

[0074] Below the motor part 4 is the lower radial bearing part 5, the corresponding journal diameter on the main shaft is φ80mm and the length is 369mm. This journal part on the main shaft has a corresponding keyway and key. The lower radial bearing part 5 is made of a steel pipe with a wall thickness of δ16mm, a diameter of φ1440mm and a length of 369mm. The two ends of the steel pipe are made of δ=16mm end plates, and the middle of the end plate is opened with a φ80mm central shaft hole 51 and a keyway 52, which match the corresponding parts on the main shaft. The end plate and the steel pipe are fixedly connected by welding.

[0075] Next, the production of the thrust bearing portion 6 will be described. Figure 7 for Figure 2 Schematic diagram of the thrust bearing section.

[0076] Below the lower radial bearing part 5 is the thrust bearing part 6. The shaft diameter of the corresponding part of the main shaft is φ60mm and the length is 475mm. This shaft neck part has a corresponding keyway and key. The thrust bearing part 6 is made of a steel pipe with a wall thickness of δ16mm, a diameter of φ1180mm and a length of 475mm. The two ends of the steel pipe are made of δ=16mm end plates. The center shaft hole 61 and keyway 62 of φ60mm are opened in the middle of the end plate, and they match the corresponding part on the main shaft. The end plate and the steel pipe are fixedly connected by welding.

[0077] Next, the production of the end cover portion 7 will be described. Figure 8 for Figure 2 Schematic diagram of the end cover portion.

[0078] Below the thrust bearing part 6 is the end cover part 7. The shaft diameter of the corresponding part of the shaft neck on the main shaft is φ60mm and the length is 191mm. This shaft neck part has a corresponding keyway and key. The end cover part 7 is made of a steel pipe with a wall thickness of δ16mm, a diameter of φ744mm and a length of 191mm. A δ=16mm end plate is made at the lower end of the steel pipe. A φ60mm central shaft hole 71 and a keyway 72 are opened in the middle of the end plate, and they match the corresponding part of the main shaft. The end plate and the steel pipe are fixedly connected by welding. After the end cover and the main shaft are assembled, the upper part of the steel pipe can be welded to the end plate of the lower radial bearing part 5.

[0079] Next, the production of the idler gear portion 2 will be described. Fig. 9 for Figure 2 Schematic diagram of the idler wheel part 2 in FIG.

[0080] The idler wheel part 2 is located above the main flange part 3 (actually corresponding to the idler wheel of the wet winding pump, and the radial bearing part between the idler wheel and the motor). The idler wheel part is used to meet the requirement that the wet winding pump has sufficient idling time after power failure, to ensure reliable shutdown and to maintain cooling flow in the core. The idler wheel part 2 corresponds to the journal part with a shaft diameter of φ100mm and a length of 1385mm on the main shaft, and this journal part has corresponding keyways and keys. The idler wheel part 2 is made of a steel pipe with a wall thickness of δ16mm, a diameter of φ1700mm, and a length of 1385mm. End plates with a wall thickness of δ=16mm are made at both ends of the steel pipe. A central axis hole 21 and a keyway 22 with a diameter of φ100mm are opened in the middle of the end plate, and they match the corresponding parts on the main shaft. The end plate and the steel pipe are fixedly connected by welding.

[0081] After being made into a whole, it is processed by machine tools. A boss with a length of 132mm and an outer diameter of φ1694mm is processed on the upper part of the idler. Figure 2 The machining accuracy of the entire idler wheel is ±0.05mm. The roundness of the outer edge is ±0.05mm, and the flatness of both ends is ±0.05mm.

[0082] Next, the production of the lead-out port 1 will be described.

[0083] Fig.10 for Figure 2 Schematic diagram of the lower section of the outlet portion 1 in FIG.

[0084] The outlet portion 1 is located above the idler wheel portion 2. In an actual wet winding pump, the outlet is used to accommodate the impeller and to discharge the liquid thrown out by the impeller in a specific direction.

[0085] The lower section of the outlet corresponds to the radial bearing of the wet winding pump and the journal part of the main shaft with a shaft diameter of φ80mm and a length of 362mm. This journal part has a corresponding keyway and key. The lower section of the outlet is made of a steel pipe with a wall thickness of δ16mm, a diameter of φ1200mm and a length of 276mm. End plates with δ=16mm are made at both ends of the steel pipe. A central shaft hole 11 and a keyway 12 with a diameter of φ100mm are opened in the middle of the end plate, and they match the corresponding parts on the main shaft. The end plate and the steel pipe are fixedly connected by welding.

[0086] In addition, the shell with a length of 86mm has a wall thickness of δ16mm and a diameter of φ1260mm. Similarly, the two ends are welded with end plates with a wall thickness of δ16mm. The center of the end plate is opened with a central shaft hole and a keyway matching the corresponding part of the main shaft (the position corresponds to the central shaft hole 11 and keyway 12 mentioned above).

[0087] Finally, the two parts are welded together to form a whole. After being made into a whole, they are processed by machine tools with a processing accuracy of ±0.05mm. The roundness of the lower outer edge (cylinder with a length of 86mm) is ±0.05mm, and the flatness of both ends is ±0.05mm.

[0088] Fig.11 for Figure 2 Schematic diagram of the upper section of the outlet portion 1 in FIG.

[0089] The upper section of the outlet portion 1 corresponds to the impeller portion of the wet winding pump, and corresponds to the shaft diameter of the journal on the main shaft, which is φ60mm and the length is 548mm. This journal portion has a corresponding keyway and key.

[0090] The upper section of the outlet 1 is made of a steel pipe with a wall thickness of δ16mm, a diameter of φ1290mm, and a length of 330mm. End plates with a wall thickness of δ=16mm are made at both ends of the steel pipe. A central axis hole 13 and a keyway 14 with a diameter of φ60mm are opened in the middle of the end plate, and they match the corresponding parts of the main shaft. The end plate and the steel pipe are fixedly connected by welding.

[0091] In addition, the outer shell of the outlet 1 with a length of 218 mm at the top is made of a steel pipe with a wall thickness of δ16 mm and a diameter of φ1012 mm. Similarly, the two ends are welded with end plates with a wall thickness of δ16, and the center of the end plate is opened with a central shaft hole and a keyway matching the corresponding part of the main shaft (the position corresponds to the central shaft hole 13 and keyway 14 mentioned above).

[0092] Finally, the two parts are welded together to form a whole. After being made into a whole, it is finely processed by machine tools with a processing accuracy of ±0.05mm.

[0093] The assembly of the wet winding pump model is described below.

[0094] After the various components of the model are completed, the overall assembly can be carried out. First, the processed main flange part 3 is installed on the main shaft 8, and then the motor part 4, the lower radial bearing part 5, the thrust bearing part 6, and the end cover part 7 are installed from the main flange part downward in sequence. At this point, the installation of the parts below the main flange part is completed, and each part is connected and fixed by welding. For example, the groove form adopts a semi-V-shaped groove, and the weld height is 12mm.

[0095] The idler part 2, the lower part of the outlet part 1 and the upper part of the outlet part are sequentially mounted on the main shaft above the main flange, and each part is connected and fixed by welding. For example, the groove form adopts a semi-V groove, and the weld height is 12 mm.

[0096] In this way, the main body of the wet winding pump model is formed.

[0097] The fabrication and assembly of the remaining components is described below.

[0098] The cooling water pipe and flange 11 outside the idler wheel 2 of the model are modeled in a 1:1 ratio (only the outer contour is required to be similar), and then welded to the corresponding parts. The motor stator terminal box 10 is made of a carbon steel plate with a wall thickness of δ10 in a 1:1 ratio, and then symmetrically welded at the corresponding positions on both sides of the lower radial bearing 5.

[0099] In an exemplary embodiment, the wet winding pump model may not be provided with the above-mentioned outlet portion.

[0100] Based on the above, the present invention proposes the following scheme:

[0101] 1. A wet winding pump model, comprising:

[0102] Idler gear part;

[0103] Main flange;

[0104] Motor Department;

[0105] a lower bearing portion; and

[0106] Spindle,

[0107] in:

[0108] The idler wheel portion, the main flange portion, the motor portion, and the lower bearing portion are sequentially arranged along the main shaft to form a cylindrical stepped structure.

[0109] 2. The wet winding pump model according to item 1, wherein:

[0110] At least one of the idler wheel portion, the main flange portion, the motor portion, and the lower bearing portion is a hollow cylinder with a cavity formed inside.

[0111] 3. The wet winding pump model according to item 1, wherein:

[0112] The model also includes a guide outlet;

[0113] At least one of the outlet portion, the idler portion, the main flange portion, the motor portion, and the lower bearing portion is a hollow cylinder with a cavity formed inside.

[0114] 4. The wet winding pump model according to 3, wherein:

[0115] The lower bearing portion includes a lower radial bearing portion and a thrust bearing portion;

[0116] The outlet portion, the idler portion, the main flange portion, the motor portion, the lower radial bearing portion, and the thrust bearing portion are sequentially arranged along the main shaft to form a cylindrical stepped structure.

[0117] 5. The wet winding pump model according to 4, wherein:

[0118] The mold also includes an end cap portion; and

[0119] The outlet portion, the idler portion, the main flange portion, the motor portion, the lower radial bearing portion, the thrust bearing portion, and the end cover portion are sequentially arranged along the main shaft to form a cylindrical stepped structure.

[0120] 6. The wet winding pump model according to 5, wherein:

[0121] At least one of the outlet portion, the idler portion, the main flange portion, the motor portion, the lower radial bearing portion, the thrust bearing portion, and the end cover portion is a hollow cylinder with a cavity formed inside.

[0122] 7. The wet winding pump model according to 6, wherein:

[0123] The outlet portion, the idler wheel portion, the main flange portion, the motor portion, the lower radial bearing portion, the thrust bearing portion, and the end cover portion are all hollow cylinders with cavities formed inside.

[0124] 8. The wet winding pump model according to 5, wherein:

[0125] A connecting flange portion is disposed on an outer peripheral surface of at least one of the idler portion and the end cover portion.

[0126] 9. A wet winding pump model according to any one of 1-6, wherein:

[0127] The main shaft is a stepped main shaft, or the main shaft is a main shaft with a constant outer diameter.

[0128] 10. The wet winding pump model according to 6, wherein:

[0129] The main shaft is a stepped main shaft and has a large diameter portion, a first shaft neck portion, a second shaft neck portion and a third shaft neck portion located above the large diameter portion and connected to the large diameter portion in sequence, and a fourth shaft neck portion, a fifth shaft neck portion and a sixth shaft neck portion located below the large diameter portion and connected to the large diameter portion in sequence; and

[0130] The main flange portion is arranged on the large diameter portion, the idler gear portion is arranged on the first shaft neck portion, the outlet portion is arranged on the second shaft neck portion and the third shaft neck portion, the motor portion is arranged on the fourth shaft neck portion, the lower radial bearing portion is arranged on the fifth shaft neck portion, and the thrust bearing and the end cover portion are arranged on the sixth shaft neck portion.

[0131] 11. The wet winding pump model according to 10, wherein:

[0132] The outer diameters of the first journal neck, the second journal neck and the third journal neck decrease in sequence;

[0133] The outer diameters of the fourth journal portion, the fifth journal portion and the sixth journal portion decrease in sequence.

[0134] 12. The wet winding pump model according to 6, wherein:

[0135] The major axis is generally circular in cross-section; and

[0136] A keyway matching structure is provided between the corresponding part of the main shaft and at least one end face or inner wall surface of the outlet portion, the idler portion, the main flange portion, the motor portion, the lower radial bearing portion, the thrust bearing portion, and the end cover portion.

[0137] 13. The wet winding pump model according to 6, wherein:

[0138] The cross section of the main axis is polygonal; and

[0139] A corresponding portion of the main shaft has a profile fit structure with at least one end face or inner wall surface of the outlet portion, the idler portion, the main flange portion, the motor portion, the lower radial bearing portion, the thrust bearing portion, and the end cover portion.

[0140] 14. The wet winding pump model according to item 1, wherein:

[0141] The upper surface of the idler wheel is provided with a boss suitable for matching with the pump housing. The wet winding pump model can be used in the simulation test of the wet winding pump installation channel in the key construction technology of nuclear power, the simulation test of the secondary handling of the wet winding pump, the commissioning and verification of the wet winding pump installation trolley, the simulated installation of the wet winding pump, etc., so as to improve the construction efficiency, reduce the construction cost and improve the construction quality.

[0142] Accordingly, the present invention also proposes a wet winding pump pre-installation simulation method, comprising the steps of:

[0143] Utilize the wet winding pump model test according to any one of 1-14 to test: the matching of the wet winding pump transport tooling or trolley with the wet winding pump, or the matching of the wet winding pump transport installation channel with the wet winding pump.

[0144] The above method may further include the steps of: changing or selecting the structure or structural parameters of the wet winding pump transport tooling based on the test results; or the structure or structural parameters of the wet winding pump transport installation channel.

[0145] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes may be made to the embodiments and combinations of elements may be made without departing from the principles and spirit of the invention, the scope of the invention being defined by the appended claims and their equivalents.

Claims

1. A wet winding pump pre-installation simulation method, comprising the steps of: Use the wet winding pump model to test: the matching of the wet winding pump transport tooling or trolley with the wet winding pump, or the matching of the wet winding pump transport installation channel with the wet winding pump; Also includes the steps: Changing or selecting the structure or structural parameters of the wet winding pump transport tooling based on the test results; or The structure or structural parameters of the wet winding pump transport installation channel; The wet winding pump model includes: Idler gear part; Main flange; Motor Department; a lower bearing portion; and Spindle, The model also includes a guide outlet; The lower bearing portion includes a lower radial bearing portion and a thrust bearing portion; The mold also includes an end cap portion; in: The idler wheel portion, the main flange portion, the motor portion, and the lower bearing portion are sequentially arranged along the main shaft to form a cylindrical stepped structure; The main shaft is a stepped main shaft, or the main shaft is a main shaft with a constant outer diameter; The main shaft is a stepped main shaft and has a large diameter portion, a first shaft neck portion, a second shaft neck portion and a third shaft neck portion located above the large diameter portion and connected to the large diameter portion in sequence, and a fourth shaft neck portion, a fifth shaft neck portion and a sixth shaft neck portion located below the large diameter portion and connected to the large diameter portion in sequence; and The main flange portion is arranged on the large diameter portion, the idler portion is arranged on the first journal portion, the outlet portion is arranged on the second journal portion and the third journal portion, the motor portion is arranged on the fourth journal portion, the lower radial bearing portion is arranged on the fifth journal portion, and the thrust bearing and the end cover portion are arranged on the sixth journal portion; The major axis is generally circular in cross-section; and A keyway matching structure is provided between the corresponding part of the main shaft and at least one end face or inner wall surface of the outlet portion, the idler portion, the main flange portion, the motor portion, the lower radial bearing portion, the thrust bearing portion, and the end cover portion.

2. The method according to claim 1, wherein: At least one of the idler wheel portion, the main flange portion, the motor portion, and the lower bearing portion is a hollow cylinder with a cavity formed inside.

3. The method according to claim 1, wherein: At least one of the outlet portion, the idler portion, the main flange portion, the motor portion, and the lower bearing portion is a hollow cylinder with a cavity formed inside.

4. The method according to claim 3, wherein: The outlet portion, the idler portion, the main flange portion, the motor portion, the lower radial bearing portion, and the thrust bearing portion are sequentially arranged along the main shaft to form a cylindrical stepped structure.

5. The method according to claim 4, wherein: The outlet portion, the idler portion, the main flange portion, the motor portion, the lower radial bearing portion, the thrust bearing portion, and the end cover portion are sequentially arranged along the main shaft to form a cylindrical stepped structure.

6. The method according to claim 5, wherein: At least one of the outlet portion, the idler portion, the main flange portion, the motor portion, the lower radial bearing portion, the thrust bearing portion, and the end cover portion is a hollow cylinder with a cavity formed inside.

7. The method according to claim 6, wherein: The outlet portion, the idler portion, the main flange portion, the motor portion, the lower radial bearing portion, the thrust bearing portion, and the end cover portion are all hollow cylinders with cavities formed inside.

8. The method according to claim 5, wherein: A connecting flange portion is disposed on an outer circumferential surface of at least one of the idler portion and the end cover portion.

9. The method according to claim 1, wherein: The outer diameters of the first journal neck, the second journal neck and the third journal neck decrease in sequence; The outer diameters of the fourth journal portion, the fifth journal portion and the sixth journal portion decrease in sequence.

10. The method according to claim 6, wherein: The cross section of the main axis is polygonal; and A corresponding portion of the main shaft has a profile fit structure with at least one end face or inner wall surface of the outlet portion, the idler portion, the main flange portion, the motor portion, the lower radial bearing portion, the thrust bearing portion, and the end cover portion.

11. The method according to claim 1, wherein: The upper surface of the idler wheel portion is provided with a boss suitable for matching with the pump housing.

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