A marine pump unit mounting base

Abstract

The utility model discloses a kind of marine pump unit installation pedestals, belong to marine pump technical field, including base and the hydraulic vibration isolation mechanism of setting in the lower end surface of base, the hydraulic vibration isolation mechanism includes installation frame, vertically arranged support shaft is in the installation frame, hydraulic cylinder assembly is provided in the installation frame, the hydraulic cylinder assembly includes hydraulic cylinder, the upper end portion of support shaft is externally extended to the outside through installation frame, and is connected with base by connecting member, the lower end portion of connecting member is connected with the piston in the hydraulic cylinder through installation frame, and it provides the support force upwards for support shaft and connecting member;Bearing assembly for balancing axial force and radial force is provided in the installation frame of the lower end portion of support shaft.This utility model can effectively isolate vibration impact, reduce vibration transmission and the generation of noise, significantly reduce the mechanical stress of key equipment, wear and fatigue damage, prolong its service life.

Description

Technical Field

[0001] This utility model belongs to the field of marine pump technology, and in particular relates to a marine pump unit mounting base. Background Technology

[0002] Marine pump units are widely used in various aspects of shipbuilding, and their role is indispensable. During ship navigation, marine pump units can be used to transport various liquids, such as fuel oil, lubricating oil, cooling water, and ballast water, to ensure the normal operation of the ship's power, lubrication, and cooling systems, and to maintain the ship's stability and safety. Their core function is to maintain the normal operation of the ship's power, stability, safety, living environment, and specific operational functions. Marine pump units are key equipment for ensuring safe navigation and efficient operation of ships.

[0003] Vibration and noise generated by shipboard electromechanical equipment pose a dual challenge to the overall operation of the vessel. On the one hand, for personnel: continuous vibration not only interferes with crew concentration and reduces work efficiency, but the low-frequency noise it induces can also easily lead to health problems such as fatigue, irritability, and hearing damage, significantly impacting the physical and mental health and work comfort of the crew. On the other hand, for equipment: long-term exposure to strong vibration and noise environments accelerates the mechanical wear of electromechanical equipment, causing structural loosening, component fatigue, and even resonance damage, directly leading to equipment performance degradation, decreased reliability, and increased failure rates. Therefore, vibration and noise reduction are not only key to improving the working and living environment of crew members, protecting their physical and mental health, and improving operational efficiency, but also important engineering and technical means to ensure the safe, reliable, and long-term operation of shipboard electromechanical equipment, and even to improve the overall integrity of the vessel and the continuity of its missions.

[0004] In marine equipment, marine pump units are often used in conjunction with rubber vibration isolators to reduce vibration and noise. Rubber vibration isolators play a crucial role in marine pump units due to their excellent elasticity and damping characteristics. When screw pumps operate, unavoidable vibrations and noise are generated. Rubber vibration isolators can effectively absorb and disperse this vibration energy, thereby significantly reducing the vibration acceleration of the equipment. However, with the development of marine technology and the increasing demands for vibration and noise control, traditional rubber vibration isolators have gradually revealed their limitations: high-frequency isolation efficiency, long-term performance stability (such as creep and aging), and poor isolation effect against extremely low-frequency vibrations. Their vibration reduction and noise reduction performance can no longer meet the stringent vibration and noise control requirements of modern ships. Summary of the Invention

[0005] To address the problems existing in the prior art, this utility model provides a marine pump unit mounting base that can effectively isolate vibration and impact, reduce vibration transmission and noise generation, significantly reduce mechanical stress, wear and fatigue damage of key equipment, and extend its service life.

[0006] This invention is implemented as follows: a marine pump unit mounting base includes a base and a hydraulic vibration isolation mechanism disposed on the lower end face of the base. The hydraulic vibration isolation mechanism includes a mounting frame, within which a support shaft is vertically disposed. A hydraulic cylinder assembly, including a hydraulic cylinder, is disposed within the mounting frame. The upper end of the support shaft extends outward through the mounting frame and is connected to the base via a connecting member. The lower end of the connecting member extends through the mounting frame and is connected to a piston within the hydraulic cylinder, providing upward support for the support shaft and the connecting member. A bearing assembly for balancing axial and radial forces is disposed within the mounting frame located at the lower end of the support shaft. Through the coordinated operation of the hydraulic cylinder assembly and the support shaft, the vibration energy generated during the operation of the marine pump unit can be effectively absorbed and attenuated. The fluid inside the hydraulic cylinder generates a damping effect when the piston moves, converting and dissipating vibration energy, thereby significantly reducing the vibration amplitude and frequency of the equipment and reducing the adverse effects of vibration on the hull structure, as well as personnel and equipment on board. The hydraulic system can adjust the support force of the hydraulic cylinder according to the load changes of the pump unit, avoiding vibration isolation failure due to fluctuations in operating conditions and maintaining stable vibration isolation efficiency.

[0007] Furthermore, the base is a cuboid structure, including a mounting top plate and a mounting bottom plate spaced apart from each other, with multiple supporting partitions arranged along the length between the top and bottom plates. This forms a stable, frame-like structure. The multiple supporting partitions effectively distribute various external forces experienced by the base during use, such as vibrations generated by equipment operation and external impact forces. The weight of the equipment and the dynamic loads generated during operation are evenly distributed across these supporting partitions, the top and bottom mounting plates, thereby enhancing the overall base's resistance to deformation and providing a stable support foundation for the equipment installed on it.

[0008] Furthermore, the mounting frame includes a vibration isolation shell, a front cover and a rear cover respectively disposed at the upper and lower ends of the vibration isolation shell, the vibration isolation shell, the front cover and the rear cover forming a receiving cavity for accommodating the hydraulic cylinder assembly and the bearing assembly; the front cover is provided with a mounting slot, and a frame extending outward from the receiving cavity is provided at the mounting slot, the inner cavity of the frame is connected to the receiving cavity to form a connecting member's movable space, and the upper end of the support shaft extends outward through the frame; the rear cover is provided with a mounting hole for mounting the bearing assembly, and a lower end cover is provided on the rear cover located at the mounting hole.

[0009] The vibration-damping housing, front cover, and rear cover form a cavity, making full use of space and compactly integrating key components. This results in a small overall size, facilitating installation and maintenance, while also improving space utilization and adapting to different installation environments and equipment layout requirements. When the base is subjected to impact, the support shaft and connecting components will shift. The mounting slots and frame design on the front cover provide space for the connecting components and support shaft to move.

[0010] Furthermore, the bearing assembly includes a first roller bearing and a deep groove ball bearing arranged sequentially along the axial direction of the support shaft. Since the direction of vibration and impact may not be only vertically downward, the first roller bearing balances the radial force on the support shaft, and the deep groove ball bearing balances the axial force on the support shaft.

[0011] Furthermore, an internal support frame is provided within the mounting frame, and the hydraulic cylinder is mounted on the internal support frame via its housing; the first roller bearing is mounted on the side wall of the internal support frame. The internal support frame provides a stable mounting foundation for the hydraulic cylinder and the first roller bearing, ensuring their stability during operation, reducing vibration and displacement, thereby improving the overall operational stability and reliability of the device and extending the service life of the components. The internal support frame, with its housing, evenly distributes the force generated by the hydraulic cylinder throughout the mounting frame structure, avoiding localized stress concentration, improving the structural strength and load-bearing capacity of the device, and enabling it to withstand greater loads and pressures. This also makes the installation of the hydraulic cylinder and the first roller bearing more convenient, allowing installers to more easily assemble and fix the components, thus improving installation efficiency.

[0012] Furthermore, a second roller bearing is fitted onto the upper end of the support shaft, with the outer ring of the second roller bearing contacting the inner wall of the connecting member. The second roller bearing, fitted onto the upper end of the support shaft with its outer ring in contact with the inner wall of the connecting member, provides stable and reliable support for the connecting member, ensuring its stability during movement or under stress, reducing swaying and offset, and improving the overall operational stability and reliability of the device. By contacting the outer ring of the second roller bearing with the inner wall of the connecting member, the load on the connecting member can be evenly distributed onto the support shaft, avoiding localized stress concentration, thereby improving the load-bearing capacity of the device and enabling it to adapt to more complex working conditions and greater load requirements.

[0013] Furthermore, a pump connection plate for connecting to the pump body is provided on the mounting top plate located at the pump mounting position, and a motor connection plate for connecting to the motor is provided on the mounting top plate located at the motor mounting position. The pump connection plate and motor connection plate are respectively located on opposite sides of the upper end face of the mounting top plate. The pump connection plate and motor connection plate allow for more precise connection between the pump and motor and the mounting top plate, providing a highly adaptable installation interface. Whether during initial installation or subsequent equipment replacement, the pump and motor can be easily and quickly fixed and positioned, ensuring the accuracy and reliability of the equipment installation. Through the pump connection plate and motor connection plate, the weight of the pump and motor, as well as the load generated during operation, can be more evenly distributed on the mounting top plate, avoiding localized stress concentration and improving the load-bearing capacity and stability of the entire mounting structure.

[0014] Furthermore, the side wall of the mounting base plate is provided with a base plate for installing the hydraulic vibration isolation mechanism, and the connecting member is connected to the base plate.

[0015] Furthermore, the hydraulic cylinder assembly comprises two sets, each positioned on one side of the support shaft. The two ends of the connecting member are connected to the pistons of the hydraulic cylinders on both sides of the support shaft. The two sets of hydraulic cylinder assemblies are symmetrically arranged on both sides of the support shaft, ensuring that the forces generated by the hydraulic cylinders during operation are balanced. This symmetrical force distribution reduces eccentric loading on the support shaft and connecting member, evenly distributing the load across them, avoiding localized stress concentration, and improving the structure's load-bearing capacity and service life.

[0016] The advantages and technical effects of this utility model are as follows: By adopting the above-mentioned technical solution, vibration and impact are effectively isolated, vibration transmission and noise generation are reduced, mechanical stress, wear and fatigue damage of key equipment are significantly reduced, and their service life is extended. By utilizing the viscous damping effect of the fluid inside the hydraulic cylinder, the intensity of mechanical vibration can be significantly attenuated. This effectively reduces the vibration amplitude of the equipment and greatly weakens vibration transmission; the damping force of the hydraulic cylinder can be adjusted according to changes in external vibration, ensuring that the system maintains a highly stable and optimal vibration isolation effect under various variable working conditions or load fluctuations. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure provided in an embodiment of the present utility model.

[0018] Figure 2 This is a schematic diagram of the base structure provided in an embodiment of the present utility model.

[0019] Figure 3 This is a schematic diagram of the hydraulic vibration isolation mechanism provided in this embodiment of the utility model.

[0020] In the diagram: 1. Base; 1-1. Mounting top plate; 1-2. Mounting bottom plate; 1-3. Support partition; 1-4. Pump connection plate; 1-5. Motor connection plate; 1-6. Base plate; 2. Hydraulic vibration isolation mechanism; 2-1. Mounting frame; 2-2. Support shaft; 2-3. Hydraulic cylinder assembly; 2-4. Hydraulic cylinder; 2-5. Connecting component; 2-6. First roller bearing; 2-7. Deep groove ball bearing; 2-8. Vibration isolation housing; 2-9. Front cover; 2-10. Rear cover; 2-11. Frame; 2-12. Lower end cover; 2-13. Internal support frame; 2-14. Hydraulic cylinder housing; 2-15. Second roller bearing. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this utility model.

[0022] It should be noted that the terms "upper", "lower", "left", "right", "top", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0023] like Figures 1 to 3 As shown, this application provides a marine pump unit mounting base, including a base 1 and a hydraulic vibration isolation mechanism 2 disposed on the lower end face of the base 1. The hydraulic vibration isolation mechanism 2 includes a mounting frame 2-1, a support shaft 2-2 vertically disposed within the mounting frame 2-1, and a hydraulic cylinder 2-4 assembly 2-3 disposed within the mounting frame 2-1. The hydraulic cylinder 2-4 assembly 2-3 includes a hydraulic cylinder 2-4. The upper end of the support shaft 2-2 extends outward through the mounting frame 2-1 and is connected to the base 1 via a connecting member 2-5. The lower end of the connecting member 2-5 extends through the mounting frame 2-1 and is connected to a piston within the hydraulic cylinder 2-4, providing upward support force for the support shaft 2-2 and the connecting member 2-5. A bearing assembly for balancing axial and radial forces is disposed within the mounting frame 2-1 located at the lower end of the support shaft 2-2. Specifically, the bearing assembly includes a first roller bearing 2-6 and a deep groove ball bearing 2-7 arranged sequentially along the axial direction of the support shaft 2-2. A pressure block is provided between the first roller bearing 2-6 and the deep groove ball bearing 2-7. An elastic retaining ring for fixing the deep groove ball bearing 2-7 is sleeved on the support shaft 2-2 located on the side of the deep groove ball bearing 2-7. Since the direction of vibration and impact may not be only vertically downward, the first roller bearing 2-6 balances the radial force on the support shaft 2-2, and the deep groove ball bearing 2-7 balances the axial force on the support shaft 2-2.

[0024] Through the coordinated operation of components such as hydraulic cylinder 2-4 assembly 2-3 and support shaft 2-2, the vibration energy generated during the operation of the marine pump unit can be effectively absorbed and attenuated. The fluid inside hydraulic cylinder 2-4 generates a damping effect when the piston moves, converting and dissipating the vibration energy, thereby significantly reducing the vibration amplitude and frequency of the equipment, reducing the adverse effects of vibration on the hull structure and onboard personnel and equipment. The hydraulic system can adjust the supporting force of hydraulic cylinder 2-4 according to changes in the pump unit load, avoiding vibration isolation failure due to fluctuations in operating conditions and maintaining stable vibration isolation efficiency.

[0025] Furthermore, the base 1 has a cuboid structure, including a mounting top plate 1-1 and a mounting bottom plate 1-2 arranged at relatively intervals. Multiple supporting partitions 1-3 are arranged along the length between the mounting top plate 1-1 and the mounting bottom plate 1-2. The upper end face of each supporting partition 1-3 is positioned on the lower end face of the mounting top plate 1-1, forming a stable, frame-like structure. The multiple supporting partitions 1-3 can effectively distribute various external forces experienced by the base 1 during use, such as vibrations generated during equipment operation and external impact forces. The weight of the equipment and the dynamic load generated during operation are evenly distributed across these supporting partitions 1-3, the mounting top plate 1-1, and the mounting bottom plate 1-2, thereby enhancing the overall deformation resistance of the base 1 and providing a stable support foundation for the equipment installed on it.

[0026] A pump connection plate 1-4 for connecting to the pump body is provided on the mounting top plate 1-1 located at the pump mounting position, and a motor connection plate 1-5 for connecting to the motor is provided on the mounting top plate 1-1 located at the motor mounting position. The pump connection plate 1-4 and motor connection plate 1-5 are respectively located on both sides of the upper surface of the mounting top plate 1-1. The arrangement of the pump connection plate 1-4 and motor connection plate 1-5 allows for a more precise connection between the pump and motor and the mounting top plate 1-1, providing a highly adaptable installation interface. Whether during initial installation or subsequent equipment replacement, the pump and motor can be easily and quickly fixed and positioned, ensuring the accuracy and reliability of the equipment installation. Through the pump connection plate 1-4 and motor connection plate 1-5, the weight of the pump and motor, as well as the load generated during operation, can be more evenly distributed on the mounting top plate 1-1, avoiding localized stress concentration and improving the load-bearing capacity and stability of the entire mounting structure.

[0027] The side wall of the mounting base plate 1-2 is provided with a base plate 1-6 for mounting the hydraulic vibration isolation mechanism 2. The connecting member 2-5 is connected to the base plate 1-6. Specifically, the connecting member 2-5 is connected to the base plate 1-6 by bolts.

[0028] Furthermore, the mounting frame 2-1 includes a vibration isolation shell 2-8, a front cover 2-9 and a rear cover 2-10 respectively disposed at the upper and lower ends of the vibration isolation shell 2-8. The vibration isolation shell 2-8, the front cover 2-9 and the rear cover 2-10 are fixed to each other by bolts. The vibration isolation shell 2-8, the front cover 2-9 and the rear cover 2-10 enclose a cavity for accommodating the hydraulic cylinder 2-4 assembly 2-3 and the bearing assembly. The front cover 2-9 is provided with a mounting slot, and a frame 2-11 extending outward from the mounting slot is provided at the mounting slot. The inner cavity of the frame 2-11 is connected to the cavity, forming an active space for the connecting member 2-5. The upper end of the support shaft 2-2 extends outward through the frame 2-11. The rear cover 2-10 is provided with a mounting hole for mounting the bearing assembly, and a lower end cover 2-12 is provided on the rear cover 2-10 at the mounting hole.

[0029] The vibration isolation housing 2-8, front cover 2-9, and rear cover 2-10 form a receiving cavity, making full use of space and compactly integrating key components. This results in a small overall size, facilitating installation and maintenance, while also improving space utilization and adapting to different installation environments and equipment layout requirements. When the base 1 is subjected to impact, the support shaft 2-2 and connecting member 2-5 will displace. The mounting slot on the front cover 2-9 and the frame 2-11 are designed to provide movement space for the connecting member 2-5 and the support shaft 2-2.

[0030] Preferably, the mounting frame 2-1 is provided with an internal support frame 2-13, and the hydraulic cylinder 2-4 is mounted on the internal support frame 2-13 through a hydraulic cylinder housing 2-14. Specifically, the hydraulic cylinder housing 2-14 is formed by a shell and a pressure cap, and the shell and pressure cap are connected to the internal support frame 2-13 by hexagonal bolts; the first roller bearing 2-6 is mounted on the side wall of the internal support. The internal support frame 2-13 provides a stable mounting base for the hydraulic cylinder 2-4 and the first roller bearing 2-6, ensuring their stability during operation, reducing vibration and displacement, thereby improving the overall operational stability and reliability of the device and extending the service life of the components. The hydraulic cylinder 2-4 is mounted on the internal support frame 2-13 through the outer shell. The internal support frame 2-13 can evenly distribute the force generated by the hydraulic cylinder 2-4 to the structure of the mounting frame 2-1, avoiding local stress concentration, improving the structural strength and load-bearing capacity of the device, and enabling the device to withstand greater loads and pressures. This also makes the installation of the hydraulic cylinder 2-4 and the first roller bearing 2-6 more convenient, allowing installers to assemble and fix the components more easily, thus improving installation efficiency.

[0031] A second roller bearing 2-15 is fitted onto the upper end of the support shaft 2-2, and the outer ring of the second roller bearing 2-15 contacts the inner wall of the connecting member 2-5. The second roller bearing 2-15, fitted onto the upper end of the support shaft 2-2, provides stable and reliable support to the connecting member 2-5, ensuring its stability during movement or under load, reducing swaying and offset, and improving the overall operational stability and reliability of the device. By contacting the outer ring of the second roller bearing 2-15 with the inner wall of the connecting member 2-5, the load on the connecting member 2-5 can be evenly distributed onto the support shaft 2-2, avoiding localized stress concentration, thereby improving the load-bearing capacity of the device and enabling it to adapt to more complex working conditions and greater load requirements.

[0032] Preferably, two sets of hydraulic cylinder 2-4 assemblies 2-3 are provided, with each set positioned on one side of the support shaft 2-2. The two ends of the connecting member 2-5 are connected to the pistons of the hydraulic cylinders 2-4 on both sides of the support shaft 2-2. The two sets of hydraulic cylinder 2-4 assemblies 2-3 are symmetrically arranged on both sides of the support shaft 2-2, ensuring that the forces generated by the hydraulic cylinders 2-4 during operation are balanced. This symmetrical force distribution reduces the off-center loading on the support shaft 2-2 and connecting member 2-5, evenly distributing the load across them, avoiding localized stress concentration, and improving the structure's load-bearing capacity and service life.

[0033] The vibration and impact generated during the operation of the screw pump are transmitted to the hydraulic vibration isolation mechanism 2 through the screw pump base 1. The connecting component 2-5, as the first part to receive the impact, will be subjected to a downward force F. The connecting component 2-5 will push the internal support shaft 2-2 to move downward. The lower end of the connecting component 2-5 is connected to the piston in the hydraulic cylinder 2-4. The hydraulic cylinder 2-4 is filled with a large amount of high-pressure hydraulic oil, which will give the piston an opposite force to prevent it from moving downward, thereby playing a role in vibration reduction.

[0034] By employing the above technical solutions, vibration and impact are effectively isolated, vibration transmission and noise generation are reduced, and mechanical stress, wear, and fatigue damage of critical equipment are significantly reduced, extending their service life. By utilizing the viscous damping effect of the fluid inside hydraulic cylinder 2-4, the intensity of mechanical vibration can be significantly attenuated. This effectively reduces the vibration amplitude of the equipment and greatly weakens vibration transmission; the damping force of hydraulic cylinder 2-4 can be adjusted according to changes in external vibration, ensuring that the system maintains a highly stable and optimal vibration isolation effect under various variable operating conditions or load fluctuations.

[0035] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A marine pump package mounting base, characterized by, The device includes a base and a hydraulic vibration isolation mechanism disposed on the lower end face of the base. The hydraulic vibration isolation mechanism includes a mounting frame, within which a support shaft is vertically disposed. A hydraulic cylinder assembly, including a hydraulic cylinder, is disposed within the mounting frame. The upper end of the support shaft extends outward through the mounting frame and is connected to the base via a connecting member. The lower end of the connecting member extends through the mounting frame and is connected to a piston within the hydraulic cylinder, providing upward support force for the support shaft and the connecting member. A bearing assembly for balancing axial and radial forces is disposed within the mounting frame located at the lower end of the support shaft.

2. A marine pump package mounting base according to claim 1, characterised in that, The base is a cuboid structure, including a mounting top plate and a mounting bottom plate that are spaced apart from each other, and multiple supporting partitions are provided between the mounting top plate and the mounting bottom plate along the length direction.

3. The marine pump package mounting base of claim 1, wherein, The mounting frame includes a vibration isolation shell, a front cover and a rear cover respectively disposed at the upper and lower ends of the vibration isolation shell, and the vibration isolation shell, the front cover and the rear cover form a receiving cavity for accommodating the hydraulic cylinder assembly and the bearing assembly; The front cover is provided with a mounting slot, and a frame extending outward from the receiving cavity is provided at the mounting slot. The inner cavity of the frame is connected to the receiving cavity to form a space for the connecting component to move. The upper end of the support shaft extends outward through the frame. The rear cover is provided with mounting holes for mounting bearing assemblies, and a lower end cover is provided on the rear cover located at the mounting holes.

4. The marine pump package mounting base of claim 1, wherein, The bearing assembly includes a first roller bearing and a deep groove ball bearing arranged sequentially along the axial direction of the support shaft.

5. A marine pump package mounting base according to claim 4, characterised in that, An internal support frame is provided within the mounting frame, and the hydraulic cylinder is mounted on the internal support frame through the hydraulic cylinder housing. The first roller bearing is mounted on the side wall of the internal support.

6. The marine pump package mounting base of claim 1, wherein, The upper end of the support shaft is fitted with a second roller bearing, and the outer ring of the second roller bearing is in contact with the inner wall of the connecting member.

7. The marine pump package mounting base of claim 1, wherein, A pump connection plate for connecting to the pump body is provided on the mounting top plate located at the pump installation position, and a motor connection plate for connecting to the motor is provided on the mounting top plate located at the motor installation position. The pump connection plate and the motor connection plate are respectively located on both sides of the upper end face of the mounting top plate.

8. The marine pump package mounting base of claim 2, wherein, The side wall of the mounting base plate is provided with a base plate for installing the hydraulic vibration isolation mechanism, and the connecting member is connected to the base plate.

9. The marine pump package mounting base of claim 1, wherein, The hydraulic cylinder assembly consists of two sets, which are respectively placed on both sides of the support shaft. The two ends of the connecting member are respectively connected to the pistons of the hydraulic cylinders on both sides of the support shaft.

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