Disc type motor transformer oil pump flow guide device and control method thereof

Abstract

The invention discloses a transformer oil pump manufacturing technology, and aims to provide a disc type motor transformer oil pump flow guiding device and a control method thereof. The technical scheme is characterized in that the disc type motor transformer oil pump flow guiding device comprises a flow guiding grid cross-shaped flow dividing device and a flow guiding grid fixing ring; the flow guide grid fixing ring is fixedly connected with the flow guide grid cross-shaped flow dividing device through welding to form a flow guide device; the flow guiding device is pressed into the pump body inlet connecting pipe through a hydraulic machine, and the flow guiding device is in interference fit with the pump body inlet connecting pipe. The flow guide grid cross-shaped flow dividing device can effectively guide oil liquid to flow to an impeller in the pump body, the pre-swirl phenomenon in the oil liquid flowing process is reduced, and the flow rate and the lift of the pump body are improved; the ratio of the outer diameter of the flow guide grid fixing ring to the maximum inner diameter of the pump body inlet connecting pipe is 1: 1.05; the distance between each flow dividing grid and the adjacent flow dividing grid of the flow guide grid cross flow dividing device is 1 / 5-1 / 10 of the diameter of the flow guide grid fixing ring; the pre-rotation phenomenon of oil in the pump body is effectively reduced; the invention is suitable for the technical field of transformer oil pump manufacturing.

Description

Technical Field

[0001] The present invention relates to a transformer oil pump manufacturing technology, and more specifically, to a disc motor transformer oil pump flow guide device and a control method thereof. Background Art

[0002] Disc motor transformer oil pumps are widely used in many fields such as electricity, industry, renewable energy and data centers to ensure the safe, stable and efficient operation of equipment. In the prior art, disc motor transformer oil pumps are pipeline structures. Because the distance between the oil inlet and the flow channel is short, pre-swirl occurs in the oil inlet pipe. Due to uneven flow, pre-swirl may cause vibration and noise of the pump, affect the stability of the equipment, reduce the life of the impeller and motor, reduce the flow rate and head, and affect the cooling efficiency.

[0003] Chinese patent literature discloses an oil pump housing for electric locomotive transformers [application number CN200720063683.0, publication number CN201078352Y], the pump body of which adopts an integral shell welding structure, greatly reducing the weight of the oil pump housing, and because it is made of profiles, the uniformity of the material of each part can be guaranteed, and there will be no shell leakage problem, effectively solving the oil leakage problem of the original transformer oil pump cast iron pump body, and reducing the volume of the oil pump and the weight of the oil pump itself. This solution ignores the effect of pre-spin at the oil inlet on the performance of the oil pump, and there is a noise problem.

[0004] Another example is a Chinese patent document that discloses a low-speed transformer oil pump [application number CN200710055694.9, publication number CN101315081A], which discovered and utilized the law that the centrifugal vortex motion of the liquid in the pump body increases energy, and created a transformer cooling oil circulation pump with the above structural characteristics. By combining centrifugal and vortex motion, the resulting low-speed oil pump can fully meet the requirements of "State Grid's Measures to Prevent Transformer Damage Accidents". The noise is reduced by reducing the speed, but the pre-swirl phenomenon is not well handled, and there is a hidden danger of affecting the life of the impeller and motor. Summary of the invention

[0005] In view of the deficiencies in the prior art, an object of the present invention is to provide a disc motor transformer oil pump flow guide device and a control method thereof.

[0006] To achieve the above object, the present invention provides the following technical solutions: a disc-type motor transformer oil pump guide device, comprising a guide grid cross flow divider device and a guide grid fixing ring, wherein the guide grid fixing ring is fixedly connected to the guide grid cross flow divider device by welding to form a guide device;

[0007] The flow guide device is pressed into the pump body inlet connecting pipe by a hydraulic press, and the flow guide device and the pump body inlet connecting pipe have an interference fit;

[0008] The guide grid cross flow diversion device can effectively guide the oil to flow to the impeller in the pump body, reduce the pre-swirl in the oil flow, and improve the flow rate and head of the pump body;

[0009] The ratio of the outer diameter of the guide grid fixing ring to the maximum inner diameter of the pump body inlet connecting pipe is 1:1.05, and the spacing between each diverter grid and the adjacent diverter grid of the guide grid cross diverter device is 1 / 5-1 / 10 of the diameter of the guide grid fixing ring.

[0010] The present invention is further configured as follows: the guide grid fixing ring is formed by laser cutting, then bent by a bending machine, and finally formed by welding at both ends; the guide grid cross diverter device and the guide grid fixing ring are integrally welded to form a guide device; wherein the diversion angle of the guide grid cross diverter device is 30°-60°, and the specific angle is optimized according to the design flow rate and head of the oil pump to ensure a smooth transition of the oil flow direction.

[0011] The present invention is further configured as follows: the material of the guide device is 304 stainless steel, and the 304 stainless steel contains at least 18% chromium and 8% nickel, so that it has excellent corrosion resistance and strength and can adapt to high temperature and corrosion-resistant working environment.

[0012] The present invention is further configured as follows: the inner diameter of the pump body inlet connecting pipe is configured to gradually become smaller, and there is an interference fit between the guide grid fixing ring and the pump body inlet connecting pipe. During the operation of the pump body, under the action of the flow of oil, the guide device is not only firm and stable, but also can effectively reduce the pre-swirling phenomenon of the oil.

[0013] A control method for a disc-type motor transformer oil pump flow guide device, characterized in that it comprises the following steps:

[0014] S1. Design and calculation: According to the working parameters of the transformer oil pump, the size and shape of the guide device are designed to ensure that the guide capacity of the guide grid can meet the working requirements of the oil pump;

[0015] S2. Material selection: Select 304 stainless steel as the material of the guide device to ensure that it has sufficient strength and corrosion resistance. The chromium content of 304 stainless steel is ≥18% and the nickel content is ≥8%;

[0016] S3, Laser cutting: Use a laser cutting machine to accurately cut the 304 stainless steel plate to ensure the dimensional accuracy of the guide fence fixing ring and the guide fence cross diversion device for subsequent assembly and installation;

[0017] S4, Bending and forming: Send the laser-cut parts into the bending machine, and use the CNC bending machine to bend the guide fence fixing ring to ensure that its final shape is consistent with the design;

[0018] S5. Welding connection: connect the bent guide fence fixing ring with the guide fence cross diversion device, and fix the two together through high-strength welding process to ensure that the welding point is firm and reliable;

[0019] S6. Hydraulic press fitting: Press the welded guide device into the oil pump inlet connecting pipe through a hydraulic press to ensure that the guide device has an interference fit with the pipe wall in the pipe to achieve a stable installation effect;

[0020] S7. Concentricity detection: Use laser measuring instruments to check the concentricity of the guide device and the inlet connecting pipe to ensure that the concentricity error does not exceed 0.05mm to avoid assembly deviation during the working process;

[0021] S8, Assembly and commissioning: Test run the assembled oil pump to test its flow, head and pre-swirl phenomenon, to ensure that the guide grid effectively reduces the pre-swirl in the inlet pipe and improves the working efficiency of the pump;

[0022] The oil pump is then tested for actual load operation to ensure that the pump body will not be worn due to pre-rotation during long-term operation, and the working parameters of the motor and bearings, including but not limited to temperature and vibration, are monitored to ensure stable operation of the equipment.

[0023] The present invention is further configured as follows: in S6, during the pressing process of the hydraulic press, the pressing force between the guide grid fixing ring and the inlet connecting pipe is controlled at 20N-30N to ensure that the cooperation between the guide device and the inlet connecting pipe reaches a predetermined interference size, prevents the assembly from being too loose or too tight, and does not damage the material.

[0024] The present invention is further configured as follows: in S8, during the trial operation, the flow rate and head of the pump are tested by a flow meter and a head meter to ensure that the guide device can effectively reduce the pre-swirling phenomenon during the flow of oil, increase the flow rate and head of the oil pump, and the flow rate deviation is controlled within 5%, and the head deviation is controlled within 3%.

[0025] The present invention is further configured as follows: in S6, the interference fit is controlled within a range of 0.2 mm to 0.5 mm to ensure the long-term stability and sealing of the device.

[0026] The present invention is further configured as follows: in S8, by installing temperature sensors and vibration sensors, the motor and bearings of the oil pump are monitored in real time to ensure that the oil pump will not fail due to bearing damage or overheating during operation, the temperature is controlled within 80°C, and the vibration amplitude is less than 0.5mm.

[0027] The beneficial effects of the present invention are:

[0028] 1. Compared with the prior art, the flow guide device of the disc motor transformer oil pump of the present invention adopts a structure combining a flow guide grid cross flow diversion device and a flow guide grid fixing ring. The flow guide device is formed by welding and fixing, which can effectively guide the oil to flow to the impeller in the pump body. This design not only reduces the pre-swirl phenomenon of the oil in the pump body, but also can significantly improve the flow rate and head of the oil pump; the reduction of the pre-swirl phenomenon can reduce the turbulence of the fluid, improve the efficiency and stability of the pump, thereby effectively extending the service life of the pump body. In addition, the interference fit design of the flow guide device and the pump body inlet connecting pipe ensures that the flow guide device is more stable during operation and can work stably under high pressure and high temperature environment.

[0029] 2. The disc motor transformer oil pump guide device of the present invention is formed by laser cutting and bending the guide grid fixing ring with a bending machine, and is integrated with the guide grid cross diverter device by welding technology. The present invention has high precision and stability in structure. Laser cutting ensures the dimensional accuracy of each part. During the bending and forming process, each angle and shape can be accurately controlled, thereby ensuring the installation and matching effect of the overall guide device. The application of welding technology ensures the overall rigidity and stability of the guide device. The welding points are firm and reliable, which effectively avoids loosening or damage problems during long-term operation. In addition, the angle of the guide grid cross diverter device is optimized according to the design requirements of the oil pump, which can ensure a smooth transition of the oil flow direction, reduce flow resistance and improve the working efficiency of the pump.

[0030] 3. In the present invention, 304 stainless steel is used as the material of the guide device, which ensures that the guide device has excellent corrosion resistance and oxidation resistance. This material contains at least 18% chromium and 8% nickel, and can maintain its structural stability in high temperature and high humidity environments. The use of 304 stainless steel improves the strength of the guide device, ensures its stable performance during long-term operation, and avoids performance degradation and equipment damage due to corrosion. For equipment such as motor transformer oil pumps that need to work in high temperature and highly corrosive environments, the selection of 304 stainless steel is very critical, which not only improves the service life of the oil pump, but also reduces maintenance costs and reduces the risk of failure due to corrosion.

[0031] 4. The present invention has a reasonable structure, is easy to manufacture, and is simple to operate. It avoids the defects of the prior art and is suitable for popularization and application. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a structural diagram of the disc-type motor transformer oil pump guide device of the present invention.

[0033] Figure 2 This is a structural diagram of the flow guide device installed in the transformer oil pump.

[0034] Figure 1-2Figure numerals: 1. guide grid cross diverter device; 2. guide grid fixing ring; 3. inlet connecting pipe. DETAILED DESCRIPTION

[0035] Reference Figure 1-2 The disc motor transformer oil pump flow guiding device and control method thereof are further described in the embodiments of the present invention.

[0036] For ease of explanation, spatial relative terms such as "upper", "lower", "left", "right" and the like are used in the embodiments to illustrate the relationship of one element or feature shown in the figure relative to another element or feature. It should be understood that, in addition to the orientation shown in the figure, the spatial terms are intended to include different orientations of the device in use or operation. For example, if the device in the figure is inverted, the element described as being "under" other elements or features will be positioned "on" other elements or features. Therefore, the exemplary term "under" can include both upper and lower orientations. The device can be positioned in other ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used here can be interpreted accordingly.

[0037] Furthermore, relational terms such as “first” and “second” and the like are merely used to distinguish one component from another having the same name, but do not necessarily require or imply any such actual relationship or order between these components.

[0038] Figure 1 to Figure 2 A disc-type motor transformer oil pump guide device shown includes a guide grid cross flow divider 1 and a guide grid fixing ring 2, wherein the guide grid fixing ring 2 is fixedly connected to the guide grid cross flow divider 1 by welding to form a guide device;

[0039] The flow guide device is pressed into the pump body inlet connecting pipe 3 by a hydraulic press, and the flow guide device and the pump body inlet connecting pipe 3 have an interference fit;

[0040] The guide grid cross flow diversion device 1 can effectively guide the oil to flow to the impeller in the pump body, reduce the pre-swirl in the oil flow, and increase the flow rate and lift of the pump body;

[0041] The ratio of the outer diameter of the guide grid fixing ring 2 to the maximum inner diameter of the pump body inlet connecting pipe 3 is 1:1.05, and the spacing between each diverter grid and the adjacent diverter grid of the guide grid cross diverter device 1 is 1 / 5-1 / 10 of the diameter of the guide grid fixing ring 2;

[0042] Compared with the prior art, the disc motor transformer oil pump guide device of the present invention adopts a structure that combines a guide grid cross-flow diversion device 1 with a guide grid fixing ring 2. The guide device is formed by welding and fixing, which can effectively guide the oil to flow to the impeller in the pump body. This design not only reduces the pre-swirl phenomenon of the oil inside the pump body, but also can significantly improve the flow rate and head of the oil pump; the reduction of the pre-swirl phenomenon can reduce the turbulence of the fluid, improve the efficiency and stability of the pump, thereby effectively extending the service life of the pump body. In addition, the interference fit design between the guide device and the pump body inlet connecting pipe 3 ensures that the guide device is more stable during operation and can work stably under high pressure and high temperature environments.

[0043] The guide fence fixing ring 2 is formed by laser cutting, then bent by a bending machine, and finally formed by welding at both ends; the guide fence cross diverter device 1 and the guide fence fixing ring 2 are welded integrally to form a guide device; wherein the diversion angle of the guide fence cross diverter device 1 is 30°-60°, and the specific angle is optimized according to the design flow rate and head of the oil pump to ensure a smooth transition of the oil flow direction;

[0044] The guide grid fixing ring 2 is formed by laser cutting and bending by a bending machine, and is integrated with the guide grid cross diverter device 1 by welding technology. The present invention has high precision and stability in structure. Laser cutting ensures the dimensional accuracy of each part. During the bending process, each angle and shape can be accurately controlled, thereby ensuring the installation and matching effect of the overall guide device. The application of welding technology ensures the overall rigidity and stability of the guide device. The welding points are firm and reliable, which effectively avoids loosening or damage problems during long-term operation. In addition, the angle of the guide grid cross diverter device 1 is optimized according to the design requirements of the oil pump, which can ensure a smooth transition of the oil flow direction, reduce flow resistance and improve the working efficiency of the pump.

[0045] The material of the guide device is 304 stainless steel, and the 304 stainless steel contains at least 18% chromium and 8% nickel, so that it has excellent corrosion resistance and strength, and can adapt to high temperature and corrosion-resistant working environment;

[0046] The use of 304 stainless steel as the material of the guide device ensures that the guide device has excellent corrosion resistance and oxidation resistance. This material contains at least 18% chromium and 8% nickel, and can maintain its structural stability in high temperature and high humidity environments. The use of 304 stainless steel improves the strength of the guide device, ensures its stable performance during long-term operation, and avoids performance degradation and equipment damage due to corrosion. For equipment such as motor transformer oil pumps that need to work in high temperature and highly corrosive environments, the choice of 304 stainless steel is very critical, which not only improves the service life of the oil pump, but also reduces maintenance costs and reduces the risk of failure due to corrosion.

[0047] The inner diameter of the pump inlet connecting pipe 3 is set to gradually decrease, and there is an interference fit between the guide grid fixing ring 2 and the pump inlet connecting pipe 3. During the operation of the pump body, under the action of the flow of oil, the guide device is not only firm and stable, but also can effectively reduce the pre-swirl phenomenon of the oil;

[0048] The interference fit design between the flow guide device and the pump body inlet connecting pipe 3 can not only ensure that the device is stable and firm during the operation of the pump body, but also effectively reduce the pre-swirl phenomenon in the oil flow. Through the gradually decreasing inner diameter of the inlet connecting pipe 3, the oil flow can be better guided, reducing unnecessary flow turbulence and energy loss. The interference fit design can ensure that the flow guide device and the pump body inlet connecting pipe 3 form a close contact during assembly, ensuring that the device is stably fixed in the pump body, avoiding loosening or slipping during assembly, thereby ensuring the long-term stable operation of the oil pump. In addition, this design can also improve the efficiency of the pump, increase the flow rate and head; when the flow guide device and the disc pump inlet connecting pipe 3 are interference assembled, it is only necessary to ensure the concentricity of the flow guide device and the inlet connecting pipe 3. When the transformer oil pump is working, the flow fastening can be completed under the flow action of the transformer, without drilling holes to install bolts and other components, reducing the generation of iron filings during assembly and the possibility of bolts loosening and falling, thereby reducing the bearing being affected by iron filings and causing bearing ball wear, thereby improving the bearing life.

[0049] A control method for a disc-type motor transformer oil pump flow guide device, characterized in that it comprises the following steps:

[0050] S1. Design and calculation: According to the working parameters of the transformer oil pump, the size and shape of the guide device are designed to ensure that the guide capacity of the guide grid can meet the working requirements of the oil pump;

[0051] S2. Material selection: Select 304 stainless steel as the material of the guide device to ensure that it has sufficient strength and corrosion resistance. The chromium content of 304 stainless steel is ≥18% and the nickel content is ≥8%;

[0052] S3, laser cutting: use a laser cutting machine to accurately cut the 304 stainless steel plate to ensure the dimensional accuracy of the guide fence fixing ring 2 and the guide fence cross diversion device 1 for subsequent assembly and installation;

[0053] S4, bending and forming: sending the laser-cut parts into a bending machine, and bending the guide fence fixing ring 2 by a CNC bending machine to ensure that its final shape is consistent with the design;

[0054] S5, welding connection: the bent guide fence fixing ring 2 is connected to the guide fence cross diversion device 1, and the two are fixed into one by a high-strength welding process to ensure that the welding point is firm and reliable;

[0055] S6. Hydraulic press fitting: Press the welded guide device into the oil pump inlet connecting pipe 3 by a hydraulic press to ensure that the guide device has an interference fit with the pipe wall in the pipe to achieve a stable installation effect;

[0056] S7. Concentricity detection: Use a laser measuring instrument to check the concentricity of the guide device and the inlet connecting pipe 3 to ensure that the concentricity error does not exceed 0.05mm to avoid assembly deviation during the working process;

[0057] S8, Assembly and commissioning: Test run the assembled oil pump to test its flow, head and pre-swirl phenomenon, to ensure that the guide grid effectively reduces the pre-swirl in the inlet pipe and improves the working efficiency of the pump;

[0058] Then, the oil pump is tested for actual load operation to ensure that the pump body will not be worn due to pre-spin during long-term operation, and the working parameters of the motor and bearings, including but not limited to temperature and vibration, are monitored to ensure stable operation of the equipment;

[0059] The control method provided by the present invention ensures that the design, material selection, processing, assembly and other links of the flow guide device are in the best state through precise control of multiple steps. In the design stage, the size and shape of the flow guide device can be optimized according to specific needs in combination with the working parameters of the oil pump to ensure that the flow guide capacity reaches the expected level. The precision of the flow guide device parts is ensured through precise laser cutting and bending forming processes, and the errors in the manufacturing process are reduced. In the welding and hydraulic pressing process, the quality of the welding points and the interference generated during the pressing process are strictly controlled to ensure the stability and sealing of the device, further reducing the influence of assembly errors and improving the working efficiency and reliability of the oil pump.

[0060] In S6, during the hydraulic press process, the pressing force between the guide grid fixing ring 2 and the inlet connecting pipe 3 is controlled at 20N-30N to ensure that the cooperation between the guide device and the inlet connecting pipe 3 reaches a predetermined interference size, prevents the assembly from being too loose or too tight, and does not damage the material;

[0061] By precisely controlling the range of the pressing force, the interference fit size between the flow guide device and the pump body inlet connecting pipe 3 is ensured, and the situation of too loose or too tight assembly is avoided, and material damage is prevented. By optimizing the press-fitting process, it can be ensured that the flow guide device is stably installed in the pump body inlet connecting pipe 3, and there will be no looseness or leakage problems caused by improper installation. This precise control ensures good sealing and stability between the flow guide device and the pump body, and avoids performance instability or failure caused by assembly problems during operation, thereby improving the long-term operation reliability and efficiency of the oil pump.

[0062] In S8, during the trial operation, the flow rate and head of the pump are tested by a flow meter and a head meter to ensure that the flow guide device can effectively reduce the pre-swirl phenomenon during the flow of oil, increase the flow rate and head of the oil pump, and the flow rate deviation is controlled within 5%, and the head deviation is controlled within 3%;

[0063] By accurately measuring the flow rate and head of the pump during the trial run, problems that may arise in the actual operation of the diversion device can be discovered and solved in a timely manner, ensuring that the oil pump can operate stably and meet the design requirements. The deviations of the flow rate and head are controlled within 5% and 3%, respectively, ensuring the effectiveness of the diversion device in optimizing the flow of oil. Accurate monitoring of test data can help staff adjust the system in a timely manner and reduce fluid losses caused by pre-swirl, thereby improving the working efficiency of the pump. In addition, the trial run can also discover possible potential problems in advance to ensure that the product reaches the best working condition before it is officially put into use.

[0064] In S6, the interference fit is controlled within a range of 0.2 mm to 0.5 mm to ensure the long-term stability and sealing of the device;

[0065] The interference fit is strictly controlled within the range of 0.2mm-0.5mm, which effectively avoids the problem of unstable assembly or poor sealing caused by excessive or small interference. This precise control ensures the close fit between the guide device and the pump body inlet connecting pipe 3, ensures the long-term stable operation of the device during operation, and avoids problems such as sealing failure or fluid leakage. Through reasonable interference fit design, the long-term stability and sealing of the guide device can be maintained, the overall performance and working efficiency of the oil pump can be improved, and the frequency and cost of equipment maintenance can be reduced.

[0066] In S8, by installing a temperature sensor and a vibration sensor, the motor and bearing of the oil pump are monitored in real time to ensure that the oil pump will not fail due to bearing damage or overheating during operation, the temperature is controlled within 80° C., and the vibration amplitude is less than 0.5 mm;

[0067] By installing temperature sensors and vibration sensors to monitor the working status of the oil pump motor and bearings, the operation of the oil pump can be monitored in real time, and abnormal conditions such as excessive temperature or excessive vibration can be discovered in time. The temperature is controlled within 80°C and the vibration amplitude is controlled within the range of <0.5mm, which helps to avoid equipment failures caused by excessive temperature or excessive vibration. The real-time monitoring system can effectively extend the service life of the motor and bearings and reduce the risk of sudden failures. This control method can ensure the stability and reliability of the equipment during long-term operation, improve the overall efficiency and operation safety of the oil pump, and reduce maintenance and downtime.

[0068] Working principle: After the power is turned on and the motor starts, the rotating motor shaft drives the pump impeller to rotate; the rotation of the pump impeller generates centrifugal force, so that the oil in the pump body is sucked in, and through the action of the diversion device, the oil in the inlet pipe flows to the impeller inside the pump; as the pump impeller continues to rotate, the oil is pushed to the pump outlet by the pump impeller, and the blade design of the pump impeller accelerates the oil in the pump body to form a certain pressure; the oil pressurized by the pump impeller is transported to the cooling system of the transformer through the pump outlet pipe for cooling and circulation.

[0069] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Common changes and substitutions made by those skilled in the art within the scope of the technical solution of the present invention should be included in the protection scope of the present invention.

Claims

1. A flow guide device for a disc-type motor transformer oil pump, characterized in that it comprises a flow guide grid cross flow divider (1) and a flow guide grid fixing ring (2), wherein the flow guide grid fixing ring (2) is fixedly connected to the flow guide grid cross flow divider (1) by welding to form the flow guide device; The flow guide device is pressed into the pump body inlet connecting pipe (3) by a hydraulic press, and the flow guide device and the pump body inlet connecting pipe (3) have an interference fit; The guide grid cross flow dividing device (1) can effectively guide the oil to flow to the impeller in the pump body, reduce the pre-swirl phenomenon in the oil flow, and improve the flow rate and head of the pump body; The ratio of the outer diameter of the guide grid fixing ring (2) to the maximum inner diameter of the pump body inlet connecting pipe (3) is 1: 1.05, the distance between each diverter grid and the adjacent diverter grid of the diverter grid cross diverter device (1) is 1 / 5-1 / 10 of the diameter of the diverter grid fixing ring (2).

2. A disc-type motor transformer oil pump flow guide device according to claim 1, characterized in that: The guide grid fixing ring (2) is formed by laser cutting, then bent by a bending machine, and finally formed by welding at both ends; the guide grid cross flow diversion device (1) and the guide grid fixing ring (2) are integrally welded to form a guide device; wherein the diversion angle of the guide grid cross flow diversion device (1) is 30°-60°, and the specific angle is optimized according to the designed flow rate and head of the oil pump to ensure a smooth transition of the oil flow direction.

3. A disc-type motor transformer oil pump flow guide device according to claim 1, characterized in that: The material of the guide device is 304 stainless steel, and the 304 stainless steel contains at least 18% chromium and 8% nickel, so that it has excellent corrosion resistance and strength and can adapt to high temperature and corrosion-resistant working environment.

4. A disc-type motor transformer oil pump flow guide device according to claim 1, characterized in that: The inner diameter of the pump body inlet connecting pipe (3) is set to gradually decrease, and there is an interference fit between the guide grid fixing ring (2) and the pump body inlet connecting pipe (3). During the operation of the pump body, under the action of the flow of oil, the guide device is not only firm and stable, but also can effectively reduce the pre-swirl phenomenon of the oil.

5. A control method for the oil pump guide device of a disc motor transformer applicable to any one of claims 1 to 4, characterized in that: The following steps are involved: S1. Design and calculation: According to the working parameters of the transformer oil pump, the size and shape of the guide device are designed to ensure that the guide capacity of the guide grid can meet the working requirements of the oil pump; S2. Material selection: Select 304 stainless steel as the material of the guide device to ensure that it has sufficient strength and corrosion resistance. The chromium content of 304 stainless steel is ≥18% and the nickel content is ≥8%; S3, laser cutting: using a laser cutting machine to accurately cut the 304 stainless steel plate to ensure the dimensional accuracy of the guide fence fixing ring (2) and the guide fence cross diversion device (1) for subsequent assembly and installation; S4, bending and forming: sending the laser-cut parts into a bending machine, and bending the guide fence fixing ring (2) by a CNC bending machine to ensure that its final shape is consistent with the design; S5, welding connection: the bent guide fence fixing ring (2) is connected to the guide fence cross flow dividing device (1), and the two are fixed into one body by a high-strength welding process to ensure that the welding point is firm and reliable; S6. Hydraulic press fitting: Press the welded guide device into the oil pump inlet connecting pipe (3) by a hydraulic press, ensuring that the guide device has an interference fit with the pipe wall in the pipe, so as to achieve a stable installation effect; S7. Concentricity detection: Use a laser measuring instrument to check the concentricity of the guide device and the inlet connecting pipe (3) to ensure that the concentricity error does not exceed 0.05 mm to avoid assembly deviation during the working process; S8, Assembly and commissioning: Test run the assembled oil pump to test its flow, head and pre-swirl phenomenon, to ensure that the guide grid effectively reduces the pre-swirl in the inlet pipe and improves the working efficiency of the pump; The oil pump is then tested for actual load operation to ensure that the pump body will not be worn due to pre-rotation during long-term operation, and the working parameters of the motor and bearings, including but not limited to temperature and vibration, are monitored to ensure stable operation of the equipment.

6. The control method of the disc motor transformer oil pump flow guide device according to claim 5, characterized in that: In S6, during the hydraulic press pressing process, the pressing force between the guide grid fixing ring (2) and the inlet connecting pipe (3) is controlled at 20N-30N to ensure that the guide device and the inlet connecting pipe (3) meet the predetermined interference size, prevent the assembly from being too loose or too tight, and avoid damaging the material.

7. The control method of the disc motor transformer oil pump flow guide device according to claim 5, characterized in that: In S8, during the trial operation, the flow rate and head of the pump are tested by means of a flow meter and a head meter to ensure that the flow guide device can effectively reduce the pre-swirl phenomenon during the flow of the oil, increase the flow rate and head of the oil pump, and that the flow rate deviation is controlled within 5% and the head deviation is controlled within 3%.

8. The control method of the disc motor transformer oil pump flow guide device according to claim 5, characterized in that: In S6, the interference fit is controlled within a range of 0.2 mm to 0.5 mm to ensure the long-term stability and sealing of the device.

9. The control method of the disc motor transformer oil pump flow guide device according to claim 5, characterized in that: In S8, by installing temperature sensors and vibration sensors, the motor and bearings of the oil pump are monitored in real time to ensure that the oil pump will not fail due to bearing damage or overheating during operation, the temperature is controlled within 80°C, and the vibration amplitude is less than 0.5mm.

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