Locomotive pump shock absorption and noise reduction device and operation method thereof

Abstract

The invention discloses a locomotive pump technology, and aims to provide a locomotive pump damping and noise reduction device and an operation method thereof, the technical scheme is that the locomotive pump damping and noise reduction device comprises a pump body, the pump body comprises a volute, an impeller and an inlet section, the impeller is arranged to be a staggered impeller assembly, and the number of blades of the staggered impeller assembly is eight. The blades are arranged in a staggered mode, the distances between the blades are designed through a mathematical model or an experiment optimization result, the distances between the blades are sequentially staggered to form staggered arrangement, the sum of the distances between every three blades is 90 degrees, the distance between two blades is 47 degrees, and the distance between the other two blades is 43 degrees, so that better pressure distribution and noise reduction effects are achieved; compared with the prior art, the locomotive pump damping and noise reduction device has the advantages that by adopting the design of the staggered impeller assembly, the impeller in the pump body can effectively reduce the disturbance of water flow in the operation process, so that the vortex and fluid vibration in the pump body are reduced, and the mechanical noise is further reduced; the invention is suitable for the technical field of locomotive pumps.

Description

Technical Field

[0001] The present invention relates to a locomotive pump technology, and more specifically, to a locomotive pump vibration reduction and noise reduction device and an operating method thereof. Background Art

[0002] The vibration reduction and noise reduction technology of locomotive pumps has always been a focus of attention in the field of rail transit. Among them, the design of staggered impellers to achieve this goal is a technology that has been developed in recent years. The proposal of this technology stems from the in-depth analysis and research on the significant vibration and noise problems of the equidistant impellers of traditional locomotive pumps during operation. The traditional locomotive pump impeller design usually adopts an equidistant blade layout. This design will produce periodic vibration and noise when the impeller rotates at high speed, which not only affects the operating efficiency of the pump, but may also damage the overall structure of the locomotive and reduce the riding comfort of passengers. Summary of the invention

[0003] In view of the deficiencies in the prior art, an object of the present invention is to provide a locomotive pump vibration reduction and noise reduction device and an operating method thereof.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a locomotive pump shock absorption and noise reduction device, comprising a pump body, the pump body comprising a volute, an impeller and an inlet section, the impeller is arranged as a staggered impeller assembly, the number of blades of the staggered impeller assembly is 8, and the spacing between the blades is designed by a mathematical model or experimental optimization results, the blade spacing is staggered in sequence to form a staggered arrangement, the sum of the spacings of every 3 blades is 90°, the spacing of 2 blades is 47°, and the spacing of the other 2 blades is 43°, so as to achieve better pressure distribution and noise reduction effects.

[0005] The present invention is further configured as follows: the inlet section is provided with a guide device, the guide device includes a plurality of guide vanes, the guide vanes are evenly distributed at the inlet and outlet of the pump body, and are optimized by fluid mechanics to reduce the kinetic energy loss of the fluid before entering the impeller.

[0006] The present invention is further configured as follows: a soundproof cover for surrounding the pump body is arranged outside the pump body, the soundproof cover is composed of multiple layers of materials, including sound-absorbing material, heat-insulating material and shock-absorbing material, the thickness ratio of the multiple layers of materials is sound-absorbing material: heat-insulating material: shock-absorbing material = 3:2:1, and the shape design of the soundproof cover is customized according to the shape of the pump body.

[0007] An operating method for a locomotive pump vibration reduction and noise reduction device, characterized in that it comprises the following steps: S1. Preparation: According to the specifications and models of the locomotive pump, select the appropriate offset impeller assembly and related accessories to ensure that the number, shape and offset angle of the blades meet the optimization requirements; S2. Impeller manufacturing: according to a specific mathematical model or experimental optimization results, a staggered impeller assembly is manufactured, wherein the number of blades of the staggered impeller assembly is 8, the sum of the spacings of every 3 blades is 90°, wherein the spacings of 2 blades are 47°, and the spacings of the other 2 blades are 43°; S3. Pump structure design: Design the volute and inlet section of the pump body according to the size and operation requirements of the selected offset impeller. The matching relationship between the volute and the offset impeller must ensure that the impeller can run smoothly inside the pump body, and optimize the fluid flow through the guide device; S4. Design and manufacture of guide device: According to the principles of fluid mechanics, design and manufacture guide vanes suitable for the inlet section of the pump body. The number, angle and position of the guide vanes should be optimized according to the fluid flow characteristics to reduce the kinetic energy loss during water inlet; S5. Design and manufacture of soundproof cover: Design and manufacture the soundproof cover according to the dimensions of the pump body and the noise reduction requirements. The soundproof cover should adopt a multi-layer material structure and be designed according to the requirements of sound-absorbing material: heat-insulating material: shock-absorbing material = 3:2:1 to achieve the best noise reduction effect; S6. Assembly of pump body and offset impeller: Install the offset impeller into the pump body and connect the impeller to the pump body through the drive shaft, while ensuring good sealing between the impeller and the pump body and stable operation; S7. Installation of the guide device: Install the guide device at the inlet section of the pump body to ensure that the fluid can obtain the best flow direction and flow rate when passing through the guide plate, reducing mechanical vibration and noise; S8. Installation of the soundproof cover: Install the soundproof cover outside the pump body to ensure that the soundproof cover can fully surround the pump body and effectively absorb and isolate the noise during the operation of the pump body; S9. Preliminary test and adjustment: After completing the above assembly, conduct a preliminary test on the pump body; the test content includes whether the impeller rotates smoothly, whether the flow rate at the pump inlet is normal, whether the noise meets the requirements, and adjust the pump body according to the test results to ensure stable operation, reduced vibration and noise reduction effects meet the expectations; S10. Long-term testing and maintenance: Carry out long-term stability testing to ensure that the locomotive pump runs smoothly, the vibration amplitude and noise meet the standards, and carry out regular maintenance and optimization based on the test results to ensure that the service life of the pump body is extended and the maintenance cost is reduced.

[0008] The present invention is further configured as follows: the number of guide plates of the guide device is 4-6, and the angle of the guide plates is 20°-30°.

[0009] The present invention is further configured as follows: the thickness of the sound absorbing material of the soundproof cover is 3-5 cm, the thickness of the heat insulating material is 2-4 cm, and the thickness of the shock absorbing material is 1-2 cm, so that the layered structure of the materials effectively reduces noise and isolates vibration.

[0010] The beneficial effects of the present invention are: 1. Compared with the prior art, the locomotive pump shock absorption and noise reduction device of the present invention adopts a staggered impeller assembly design, so that the impeller in the pump body can effectively reduce the disturbance of water flow during operation, thereby reducing the vortex and fluid vibration in the pump body, and further reducing mechanical noise. The staggered impeller assembly avoids the strong vortex and pressure fluctuations that may be generated by the traditional impeller during rotation by accurately optimizing the blade spacing, thereby improving the fluid dynamic performance of the pump body. The staggered design of each blade can distribute the pressure more evenly and avoid the sharp noise generated when the impeller is running, thereby significantly reducing the mechanical noise. The further optimized blade spacing design makes the pump body more stable during operation, extends the service life of the equipment, and improves the energy efficiency of the pump.

[0011] 2. The vibration and noise reduction device for the locomotive pump of the present invention sets the number of blades of the offset impeller assembly to 8 and accurately optimizes the blade spacing design, so that the pump body can not only achieve a more uniform pressure distribution during operation, but also further optimize the noise control effect. The design in which the sum of the spacings of every 3 blades is 90° makes the relative movement between the blades smoother, avoids instantaneous pressure changes caused by uneven spacing, and significantly reduces the vibration and noise of the pump body. With the precise distribution of blade spacings of 47° and 43°, a better fluid flow path can be achieved, reducing the noise and vibration caused by water flow impact; therefore, the design of the present invention improves the overall stability of the pump body, reduces the mechanical wear caused by pressure fluctuations during operation, and improves the working efficiency of the locomotive pump.

[0012] 3. In the present invention, the design of the guide device can effectively optimize the fluid flow path and reduce the kinetic energy loss of the fluid before entering the impeller by arranging multiple guide vanes at the inlet section of the pump body. The uniform distribution of the guide vanes and the optimized design of fluid mechanics make the fluid entering the impeller more stable, avoiding eddy currents and cavitation caused by flow turbulence, and further reducing the vibration and noise of the pump body. At the same time, the guide device can reduce the friction loss between the fluid and the pump body structure, improve the working efficiency of the fluid, and reduce the energy consumption inside the pump body. Due to the optimization of the guide vanes, the pump body can achieve a higher energy efficiency ratio and a lower noise level during operation, thereby improving the overall performance and environmental adaptability of the locomotive pump.

[0013] 4. The present invention has a simple and reasonable structure, is easy to manufacture, and is easy to operate. It avoids the defects of the prior art and is suitable for popularization and application. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a structural diagram of the locomotive pump vibration reduction and noise reduction device of the present invention.

[0015] Figure 2 This is the impeller pressure cloud diagram of the traditional impeller.

[0016] Figure 3 This is the impeller pressure cloud diagram of the misaligned impeller.

[0017] Figure 4 This is the volute pressure cloud diagram of the traditional impeller.

[0018] Figure 5 This is the volute pressure cloud diagram of the offset impeller.

[0019] Figure 6 This is the impeller vortex cloud diagram of the traditional impeller.

[0020] Figure 7 This is the impeller vorticity cloud diagram of the offset impeller.

[0021] Figure 8 The impeller pressure comparison curve of the traditional impeller and the offset impeller. DETAILED DESCRIPTION

[0022] Reference Figure 1-8 The locomotive pump vibration reduction and noise reduction device and the operating method thereof are further described in the following embodiments.

[0023] 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.

[0024] 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.

[0025] Figures 1 to 8A locomotive pump vibration reduction and noise reduction device shown includes a pump body, the pump body includes a volute, an impeller and an inlet section, the impeller is set as a staggered impeller assembly, the number of blades of the staggered impeller assembly is 8, and the spacing between the blades is designed by a mathematical model or experimental optimization results, the blade spacing is staggered in sequence to form a staggered arrangement, the sum of the spacings of every 3 blades is 90°, the spacing of 2 blades is 47°, and the spacing of the other 2 blades is 43°, so as to achieve better pressure distribution and noise reduction effect; Compared with the prior art, the locomotive pump shock absorption and noise reduction device of the present invention adopts a staggered impeller assembly design, so that the impeller in the pump body can effectively reduce the disturbance of water flow during operation, thereby reducing the vortex and fluid vibration in the pump body, and further reducing mechanical noise. The staggered impeller assembly avoids the strong vortex and pressure fluctuations that may be generated by the traditional impeller during rotation by accurately optimizing the blade spacing, thereby improving the fluid dynamic performance of the pump body. The staggered design of each blade can distribute the pressure more evenly and avoid the sharp noise generated when the impeller is running, thereby significantly reducing the mechanical noise. The further optimized blade spacing design makes the pump body more stable during operation, extends the service life of the equipment, and improves the energy efficiency of the pump.

[0026] By setting the number of blades of the staggered impeller assembly to 8 and precisely optimizing the blade spacing design, the pump body can not only achieve a more uniform pressure distribution during operation, but also further optimize the noise control effect. The design in which the sum of the spacings of every 3 blades is 90° makes the relative movement between the blades smoother, avoids instantaneous pressure changes caused by uneven spacing, and significantly reduces the vibration and noise of the pump body. With the precise distribution of blade spacings of 47° and 43°, a better fluid flow path can be achieved, reducing the noise and vibration caused by water flow impact, and effectively reducing the pressure at the impeller outlet and the baffle. In addition, by reducing the pressure pulsation in the rotating area, the noise level of the locomotive pump during operation is effectively reduced, and the use comfort is improved. Therefore, the design of the present invention improves the overall stability of the pump body, reduces the mechanical wear caused by pressure fluctuations during operation, and improves the working efficiency of the locomotive pump.

[0027] The inlet section is provided with a flow guide device, which includes a plurality of flow guide vanes, which are evenly distributed at the inlet and outlet of the pump body and are designed through fluid mechanics optimization to reduce the kinetic energy loss of the fluid before entering the impeller; The design of the guide device can effectively optimize the fluid flow path and reduce the kinetic energy loss of the fluid before entering the impeller by setting multiple guide vanes at the inlet section of the pump body. The uniform distribution of the guide vanes and the optimized fluid mechanics design make the fluid entering the impeller more stable, avoiding vortexes and cavitation caused by flow turbulence, and further reducing the vibration and noise of the pump body. At the same time, the guide device can reduce the friction loss between the fluid and the pump body structure, improve the working efficiency of the fluid, and reduce the energy consumption inside the pump body. Due to the optimization of the guide vanes, the pump body can achieve a higher energy efficiency ratio and a lower noise level during operation, thereby improving the overall performance and environmental adaptability of the locomotive pump.

[0028] A soundproof cover for surrounding the pump body is arranged outside the pump body, and the soundproof cover is composed of multiple layers of materials, including sound-absorbing material, heat-insulating material and shock-absorbing material, and the thickness ratio of the multiple layers of materials is sound-absorbing material: heat-insulating material: shock-absorbing material=3:2:1, and the shape design of the soundproof cover is customized according to the shape of the pump body; The multi-layer structure of sound-absorbing material, heat-insulating material and shock-absorbing material can effectively absorb, isolate and reduce the noise and vibration generated by the operation of the pump body. The sound-absorbing material can absorb the sound waves generated when the pump body is working. The heat-insulating material effectively reduces the impact of temperature changes of the pump body on noise and vibration. The shock-absorbing material further reduces the resonance effect of the pump body caused by mechanical vibration. The soundproof cover customized according to the shape of the pump body can tightly surround the pump body to avoid the leakage of external noise, thereby providing a more comfortable and quiet working environment for the locomotive. This multi-layer structure design effectively improves the noise control effect, extends the service life of the pump body, and reduces the maintenance frequency and cost.

[0029] An operating method for a locomotive pump vibration reduction and noise reduction device, characterized in that it comprises the following steps: S1. Preparation: According to the specifications and models of the locomotive pump, select the appropriate offset impeller assembly and related accessories to ensure that the number, shape and offset angle of the blades meet the optimization requirements; S2. Impeller manufacturing: according to a specific mathematical model or experimental optimization results, a staggered impeller assembly is manufactured, wherein the number of blades of the staggered impeller assembly is 8, the sum of the spacings of every 3 blades is 90°, wherein the spacings of 2 blades are 47°, and the spacings of the other 2 blades are 43°; S3. Pump structure design: Design the volute and inlet section of the pump body according to the size and operation requirements of the selected offset impeller. The matching relationship between the volute and the offset impeller must ensure that the impeller can run smoothly inside the pump body, and optimize the fluid flow through the guide device; S4. Design and manufacture of guide device: According to the principles of fluid mechanics, design and manufacture guide vanes suitable for the inlet section of the pump body. The number, angle and position of the guide vanes should be optimized according to the fluid flow characteristics to reduce the kinetic energy loss during water inlet; S5. Design and manufacture of soundproof cover: Design and manufacture the soundproof cover according to the dimensions of the pump body and the noise reduction requirements. The soundproof cover should adopt a multi-layer material structure and be designed according to the requirements of sound-absorbing material: heat-insulating material: shock-absorbing material = 3:2:1 to achieve the best noise reduction effect; S6. Assembly of pump body and offset impeller: Install the offset impeller into the pump body and connect the impeller to the pump body through the drive shaft, while ensuring good sealing between the impeller and the pump body and stable operation; S7. Installation of the guide device: Install the guide device at the inlet section of the pump body to ensure that the fluid can obtain the best flow direction and flow rate when passing through the guide plate, reducing mechanical vibration and noise; S8. Installation of the soundproof cover: Install the soundproof cover outside the pump body to ensure that the soundproof cover can fully surround the pump body and effectively absorb and isolate the noise during the operation of the pump body; S9. Preliminary test and adjustment: After completing the above assembly, conduct a preliminary test on the pump body; the test content includes whether the impeller rotates smoothly, whether the flow rate at the pump inlet is normal, whether the noise meets the requirements, and adjust the pump body according to the test results to ensure stable operation, reduced vibration and noise reduction effects meet the expectations; S10, Long-term testing and maintenance: Conduct long-term stability tests to ensure that the locomotive pump runs smoothly, the vibration amplitude and noise meet the standards, and conduct regular maintenance and optimization based on the test results to ensure that the service life of the pump body is extended and the maintenance cost is reduced; The operating method of the present invention provides a systematic process for the design, manufacture, installation and maintenance of locomotive pumps through detailed step-by-step guidance, fully considering the optimization requirements of fluid mechanics and noise control, and through reasonable design and scientific manufacturing technology, ensuring the synergistic effect of various parts such as the offset impeller assembly, the guide device and the sound insulation cover, and realizing the maximization of the overall shock absorption and noise reduction effect. In addition, through long-term testing and maintenance, the stability and noise control effect of the equipment in long-term use are ensured, which helps to extend the service life of the pump body, reduce operating costs, and improve the working efficiency and economic benefits of the locomotive pump.

[0030] The number of guide plates of the guide device is 4-6, and the angle of the guide plates is 20°-30°; The optimized design of the guide vanes in the guide device not only ensures the stability of the fluid flow, but also further reduces the noise level of the pump body. By setting the number of guide vanes to 4-6 and accurately adjusting the angle of the guide vanes to 20°-30°, the fluid can be smoothly guided, and the turbulence and vibration generated when the fluid enters the impeller can be reduced, thereby effectively reducing the mechanical noise of the pump body. In addition, the optimization of the guide vane design can also improve the working efficiency of the pump body, reduce energy consumption, ensure the smooth operation of the pump body, and avoid excessive mechanical wear. Therefore, this design of the guide device provides the pump body with higher working stability and lower noise output, and enhances the comprehensive performance of the locomotive pump.

[0031] The thickness of the sound-absorbing material of the soundproof cover is 3-5 cm, the thickness of the heat-insulating material is 2-4 cm, and the thickness of the shock-absorbing material is 1-2 cm. The hierarchical structure of the materials effectively reduces noise and isolates vibration. The multi-layer material structure design of the soundproof cover enables materials with different functions to work together to effectively reduce the noise and vibration of the pump body. The thickness range of the sound-absorbing material is 3-5cm, the heat-insulating material is 2-4cm, and the shock-absorbing material is 1-2cm. The thickness ratio can be precisely adjusted according to the noise frequency and vibration amplitude to provide the best noise reduction effect. The sound-absorbing material mainly absorbs low-frequency noise, the heat-insulating material prevents the accumulation of heat and causes the noise to increase, and the shock-absorbing material further reduces the noise transmission by alleviating the vibration transmission between the pump body and the external environment. In addition, the structure of this composite material also effectively reduces the mechanical vibration generated by the pump body, improves the running stability of the locomotive pump, and extends the service life of the equipment.

[0032] Figure 2 and Figure 3 The difference in outlet pressure between the impeller with staggered arrangement and the impeller with traditional arrangement is shown; the impeller with staggered arrangement shows a lower pressure area at the outlet, indicating that the impact and energy loss of the fluid at the outlet are reduced, which may be because the staggered arrangement optimizes the flow path of the fluid, making the fluid more evenly distributed at the outlet and reducing the formation of high-pressure areas.

[0033] Figure 4 and Figure 5 Focus on the pressure distribution at the impeller tongue; in the staggered impeller, the pressure at the tongue is lower than that of the traditional arrangement, which indicates that the staggered arrangement reduces the impact of the fluid at the tongue and the formation of vortex, thereby reducing the pressure in this area.

[0034] Figure 6 and Figure 7The figure shows a comparison of the impeller vorticity clouds of the staggered impeller and the traditionally arranged impeller, where vorticity indicates the intensity of fluid rotation; in the staggered impeller, the vorticity cloud diagram shows a lower vorticity area, especially at the impeller outlet and the baffle; this indicates that the staggered arrangement reduces the rotation of the fluid inside the impeller and the vortex formation, thereby reducing the vorticity.

[0035] Figure 8 The comparison of the noise level at the center of the impeller with staggered arrangement and the impeller with traditional arrangement is shown; through observation, it can be found that the noise level at the center of the impeller with staggered arrangement is significantly lower than that of the impeller with traditional arrangement; this shows that the staggered arrangement has a significant effect on reducing the noise at the center of the impeller.

[0036] Working principle: During the operation of the locomotive pump, when the offset impeller rotates, due to the uneven distance between the blades, the pressure pulsation generated by the fluid passing through the impeller is no longer a single-frequency periodic fluctuation, but is dispersed into random fluctuations of multiple frequencies. This random fluctuation effectively reduces the peak and trough intensity of the noise response, thereby achieving the effect of vibration reduction and noise reduction.

[0037] 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 vibration and noise reduction device for a locomotive pump, comprising a pump body, the pump body comprising a volute, an impeller and an inlet section, characterized in that: The impeller is configured as a staggered impeller assembly having 8 blades, and the spacing between the blades is designed through a mathematical model or experimental optimization results. The blade spacings are staggered in sequence to form a staggered arrangement, and the sum of the spacings between every 3 blades is 90°, wherein the spacing between 2 blades is 47°, and the spacing between the other 2 blades is 43°, so as to achieve better pressure distribution and noise reduction effects.

2. A locomotive pump vibration reduction and noise reduction device according to claim 1, characterized in that: The inlet section is provided with a flow guide device, which includes a plurality of flow guide vanes, which are evenly distributed at the inlet and outlet of the pump body and are designed through fluid mechanics optimization to reduce the kinetic energy loss of the fluid before entering the impeller.

3. The locomotive pump vibration reduction and noise reduction device according to claim 1, characterized in that: A soundproof cover for surrounding the pump body is arranged outside the pump body, and the soundproof cover is composed of multiple layers of materials, including sound-absorbing material, heat-insulating material and shock-absorbing material. The thickness ratio of the multiple layers of materials is sound-absorbing material: heat-insulating material: shock-absorbing material = 3:2:1, and the shape design of the soundproof cover is customized according to the shape of the pump body.

4. An operating method for a locomotive pump vibration reduction and noise reduction device according to any one of claims 1 to 3, characterized in that: The following steps are involved: S1. Preparation: According to the specifications and models of the locomotive pump, select the appropriate offset impeller assembly and related accessories to ensure that the number, shape and offset angle of the blades meet the optimization requirements; S2. Impeller manufacturing: according to a specific mathematical model or experimental optimization results, a staggered impeller assembly is manufactured, wherein the number of blades of the staggered impeller assembly is 8, the sum of the spacings of every 3 blades is 90°, wherein the spacings of 2 blades are 47°, and the spacings of the other 2 blades are 43°; S3. Pump structure design: Design the volute and inlet section of the pump body according to the size and operation requirements of the selected offset impeller. The matching relationship between the volute and the offset impeller must ensure that the impeller can run smoothly inside the pump body, and optimize the fluid flow through the guide device; S4. Design and manufacture of guide device: According to the principles of fluid mechanics, design and manufacture guide vanes suitable for the inlet section of the pump body. The number, angle and position of the guide vanes should be optimized according to the fluid flow characteristics to reduce the kinetic energy loss during water inlet; S5. Design and manufacture of soundproof cover: Design and manufacture the soundproof cover according to the dimensions of the pump body and the noise reduction requirements. The soundproof cover should adopt a multi-layer material structure and be designed according to the requirements of sound-absorbing material: heat-insulating material: shock-absorbing material = 3:2:1 to achieve the best noise reduction effect; S6. Assembly of pump body and offset impeller: Install the offset impeller into the pump body and connect the impeller to the pump body through the drive shaft, while ensuring good sealing between the impeller and the pump body and stable operation; S7. Installation of the guide device: Install the guide device at the inlet section of the pump body to ensure that the fluid can obtain the best flow direction and flow rate when passing through the guide plate, reducing mechanical vibration and noise; S8. Installation of the soundproof cover: Install the soundproof cover outside the pump body to ensure that the soundproof cover can fully surround the pump body and effectively absorb and isolate the noise during the operation of the pump body; S9. Preliminary test and adjustment: After completing the above assembly, conduct a preliminary test on the pump body; the test content includes whether the impeller rotates smoothly, whether the flow rate at the pump inlet is normal, whether the noise meets the requirements, and adjust the pump body according to the test results to ensure stable operation, reduced vibration and noise reduction effects meet the expectations; S10. Long-term testing and maintenance: Carry out long-term stability testing to ensure that the locomotive pump runs smoothly, the vibration amplitude and noise meet the standards, and carry out regular maintenance and optimization based on the test results to ensure that the service life of the pump body is extended and the maintenance cost is reduced.

5. The operating method of the locomotive pump vibration reduction and noise reduction device according to claim 4, characterized in that: The number of guide plates of the guide device is 4-6, and the angle of the guide plates is 20°-30°.

6. The operating method of the locomotive pump vibration reduction and noise reduction device according to claim 4, characterized in that: The thickness of the sound-absorbing material of the soundproof cover is 3-5 cm, the thickness of the heat-insulating material is 2-4 cm, and the thickness of the shock-absorbing material is 1-2 cm. The hierarchical structure of the materials effectively reduces noise and isolates vibration.

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