A low-noise compensation structure for a pump operation condition installation posture of a high-pressure pipeline system of a ship

Abstract

The application relates to a low-noise compensation structure for the installation posture of a ship high-pressure pipeline system pump source operation mode, relates to the field of ship vibration noise control, and comprises a pump group, a balance flexible connecting pipe fixedly connected to the inlet and outlet pipelines of the pump group, a damping platform arranged on the pump group, a vertical adjusting assembly arranged on the damping platform relative to the pump group, and the vertical adjusting assembly limiting the pump group to be in a vertical state. The application has the effects of guaranteeing the low-noise operation posture of the pump group, reducing the inclined displacement of the pump group during operation, reducing the vibration noise of the pump group in the operation state, and reducing the mechanical noise of the ship.

Description

Technical Field

[0001] This application relates to the field of ship vibration and noise control, and in particular to a low-noise compensation structure for the installation posture of a ship's high-pressure pipeline system pump source during operation. Background Technology

[0002] Mechanical system noise is the primary noise source for ships operating at low speeds, exhibiting distinct low-frequency line spectrum characteristics, making it a key focus in ship vibration reduction and noise control design. Pumps are among the most widely used and common mechanical equipment on ships; therefore, low-noise and vibration-reducing design for pumps and related piping systems is crucial for controlling ship mechanical noise.

[0003] Vibration isolation design is an important means of controlling mechanical noise. Currently, many ship models employ extensive vibration isolation designs to control ship vibration and noise induced by pump equipment, including single-layer, double-layer, and floating raft isolation. These designs effectively suppress pump vibration transmission and continuously reduce the vibration and sound radiation energy induced by pump mechanical vibration. However, due to the asymmetry and non-uniformity of pump equipment and the coupling characteristics between the pump source and the piping system, traditional vibration isolation designs struggle to address the problem of deteriorating vibration caused by the coupling between the pump source and the piping system. This is mainly because the piping adds weight and exerts additional forces on the pump. Furthermore, unevenness in the pump's mounting brackets can cause the pump source to tilt, leading to worsened pump vibration and noise, thus affecting overall system vibration and noise control.

[0004] Under high-pressure operating conditions, the vibration and noise degradation caused by the coupling between the pump unit and the pipeline system is more pronounced. The main reason is that under high-pressure conditions, due to the asymmetrical design of the pump unit's inlet and outlet, the pump unit is subjected to strong forces from the high-pressure medium inside the pipeline and forces generated by pipeline deformation. These forces, acting on the elastically mounted pump unit, cause a significant tilt, meaning the pump unit is no longer completely upright. This results in strong contact stress between the motor and the rotor shaft and bearings of the pump head, leading to a significant deterioration in vibration and noise during operation. Furthermore, some side-mounted vibration-isolated pump units, due to uneven stress distribution on the side-mounted vibration isolators, also experience tilting during operation, further worsening vibration and noise levels and failing to meet the low-noise design and operational requirements of ships. Summary of the Invention

[0005] In order to ensure low-noise operation of the pump unit, reduce the tilt displacement of the pump unit, reduce the vibration noise of the pump unit during operation, and reduce the noise of ship machinery, this application provides a low-noise compensation structure for the installation posture of the pump source in the operating condition of a ship's high-pressure pipeline system.

[0006] This application provides a low-noise compensation structure for the installation posture of a pump source in a ship's high-pressure pipeline system during operation, which adopts the following technical solution:

[0007] A low-noise compensation structure for the installation posture of a pump source in a ship's high-pressure pipeline system includes a pump set, with a balanced flexible connecting pipe fixedly connected to the inlet and outlet pipes of the pump set. A vibration damping platform is provided on the pump set, and a vertical adjustment component is provided on the vibration damping platform relative to the pump set, the vertical adjustment component restricting the pump set to a vertical state.

[0008] Optionally, the vertical adjustment assembly includes a vertically arranged base, and multiple bases are arranged on the vibration damping platform. The bases are respectively located in a first direction and a second direction of the pump group, and the first direction and the second direction are horizontal and vertical. A telescopic adjustment component is arranged between the base and the pump group. One end of the telescopic adjustment component is connected to the base, and the other end of the telescopic adjustment component is connected to the pump group.

[0009] Optionally, a first vibration isolator is fixedly connected to the base relative to the telescopic adjustment component, and the first vibration isolator is connected to the telescopic adjustment component.

[0010] Optionally, the telescopic adjustment component includes a first threaded rod, the end of which is fixedly connected to the first vibration isolator. A second threaded rod is provided on the side of the first threaded rod near the pump unit. The first threaded rod and the second threaded rod are coaxially arranged. A threaded sleeve is provided between the first threaded rod and the second threaded rod. The threaded sleeve is threadedly connected to the first threaded rod and the second threaded rod. A gap is left between the first threaded rod and the second threaded rod.

[0011] Optionally, the pump assembly is fixedly connected to a tie rod base relative to the second threaded rod, and the tie rod base is connected to the second threaded rod.

[0012] Optionally, the pull rod base includes a housing, the housing has a pull hole inside, the pull hole includes a connecting part that communicates with the outside, the connecting part has a receiving part on the side near the pump unit, the end of the second threaded rod is fixedly connected to a clamping plate, the clamping plate is located in the receiving part, and the vertical cross-sectional area of ​​the clamping plate is larger than the opening of the connecting part.

[0013] Optionally, multiple sets of the telescopic adjustment components are provided in the first direction, and multiple sets of the telescopic adjustment components are provided in the second direction.

[0014] Optionally, the vibration damping platform has a perforation through which the pump unit passes. A second vibration isolator is fixedly connected to the side wall of the pump unit. The second vibration isolator is fixedly connected to the vibration damping platform, and the vibration damping platform has a gap relative to the pump unit.

[0015] Optionally, the actual load borne by the second vibration isolator shall not be less than 80% of the rated load of the second vibration isolator.

[0016] Optionally, multiple second vibration isolators are provided, and the sum of the dynamic stiffness of the multiple second vibration isolators is k1. The radial dynamic stiffness of the balancing flexible tube is not greater than 1 / 10 of the sum of the dynamic stiffness of the multiple second vibration isolators k1.

[0017] In summary, this application includes at least one of the following beneficial technical effects:

[0018] 1. By configuring a vertical adjustment assembly with vibration isolators at the bottom of the pump source in the high-pressure pipeline system, the operating posture of the pump source during high-pressure pipeline system operation can be adjusted. This solves the problem of poor acoustic performance caused by vibration and noise degradation due to internal stress of the pipeline medium and skewed operating posture of existing pump sets. It can guide the vibration isolation design and low-noise installation of marine pump equipment, and provide support for the acoustic scheme design of marine mechanical systems and the preparation of related installation documents. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall state of a low-noise compensation structure for the pump source of a ship's high-pressure pipeline system under operating conditions, as described in this application embodiment.

[0020] Figure 2 This is a top view of the vibration reduction platform of a low-noise compensation structure for a ship's high-pressure pipeline system pump source operating condition, as described in an embodiment of this application.

[0021] Explanation of reference numerals in the attached drawings: 1. Vibration damping platform; 2. Second vibration isolator; 3. Pump unit; 4. Vertical adjustment assembly; 41. Base; 42. First vibration isolator; 43. Telescopic adjustment component; 431. First threaded rod; 432. Second threaded rod; 433. Threaded sleeve; 44. Tie rod base. Detailed Implementation

[0022] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0023] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and therefore the scope of protection of the invention is not limited to the specific embodiments disclosed below.

[0024] The following is in conjunction with the appendix Figure 1-2 This application will be described in further detail.

[0025] This application discloses a low-noise compensation structure for the installation posture of a pump source in a ship's high-pressure pipeline system under operating conditions. (Refer to...) Figure 1 A low-noise compensation structure for the installation posture of a pump source in a ship's high-pressure pipeline system includes a horizontally arranged vibration damping platform 1, on which a pump unit 3 is vertically arranged. A perforation is opened at the position of the vibration damping platform 1 relative to the pump unit 3, and the perforation completely penetrates the side wall of the vibration damping platform 1. The pump unit 3 passes through the inside of the perforation. A gap is left between the side wall of the vibration damping platform 1 relative to the perforation and the side wall of the pump unit 3 to reduce the contact between the pump unit 3 and the vibration damping platform 1.

[0026] A second vibration isolator 2 is fixedly connected to the side wall of the pump unit 3. The bottom end of the second vibration isolator 2 is fixedly connected to the side wall of the vibration damping platform 1. The pump unit 3 is connected to the vibration damping platform 1 through the second vibration isolator.

[0027] The high-pressure pipeline system pump unit 3 is typically subjected to three forces: first, the gravity of pump unit 3, which is the wet weight G1 including the liquid inside pump unit 3; second, the static pressure of the fluid medium inside the pipeline, which is perpendicular to the pump inlet and outlet directions, and is expressed as F1 and F2 respectively. 1进 F 1出 Thirdly, it is subject to internal pipeline stress caused by high pressure or high temperature acting on structural parts such as pipe bends. This internal stress is perpendicular to the inlet and outlet directions of the pump. 2进 F 2出 ; Calculate and analyze the wet weight G1 of pump unit 3 and the force F acting along the pump inlet. 进 The force F along the pump outlet 出 .

[0028] Based on the wet weight G1 of pump set 3 and the number of mounting interfaces of pump set 3, and in combination with the installation frequency requirements of pump set 3, the selection of the second vibration isolator 2 of pump set 3 is completed. The actual load borne by the second vibration isolator 2 of pump set 3 should not be less than 80% of the rated load of the second vibration isolator 2.

[0029] A balanced flexible connector is fixedly connected to the pipeline at the inlet and outlet positions of pump unit 3. The radial dynamic stiffness of the balanced flexible connector should not be greater than 1 / 10 of the sum of all dynamic stiffness k1 of the second vibration isolator 2 of the pump unit 3 foot; at the same time, the maximum deformation of the balanced flexible connector should meet the deformation safety requirements of the pipeline system.

[0030] The force Fin exerted on the pump body along the inlet pipe and the force Fout exerted along the outlet pipe are decomposed into two orthogonal directions x and y on the pump body, respectively: Fin and Fout. x and F y For pumps with perpendicular inlet and outlet, x and y can represent the inlet and outlet directions; for pumps with non-perpendicular inlet and outlet directions, the x and y directions can be determined based on the pump's geometry and installation space.

[0031] According to the force F exerted by the pipeline on pump unit 3 x and F y Vertical adjustment components 4 are designed in the x and y directions respectively. The vertical adjustment components 4 adjust the vertical direction of the pump group 3 so that the pump group 3 can always maintain a vertical state.

[0032] The vertical adjustment component 4 includes a vertically arranged base 41, which is located at the bottom of the vibration damping platform 1 and is fixedly connected to the vibration damping platform 1. The base 41 is arranged along the first direction and the second direction of the vibration damping platform 1 relative to the pump group 3. The first direction is parallel to the X direction mentioned above, and the second direction is parallel to the Y direction mentioned above. The first direction and the second direction are arranged perpendicularly.

[0033] A first vibration isolator 42 is fixedly connected to the side of the base 41 near the pump unit 3, and the first vibration isolator 42 is horizontally arranged. In some embodiments, the first vibration isolator 42 is a rubber vibration damper with a limiting structure, and the vibration damper is preferably a low stiffness vibration damper;

[0034] A telescopic adjustment component 43 is also provided between the base 41 and the pump group 3. One end of the telescopic adjustment component 43 abuts against the base 41, and the other end of the telescopic adjustment component 43 abuts against the pump group 3. The length of the telescopic adjustment component 43 can be adjusted according to the requirements, thereby adjusting the position of the pump group 3 in the x and y directions, so that the pump group 3 always remains in a vertical state.

[0035] The telescopic adjustment component 43 includes a horizontally arranged first threaded rod 431. One end of the first threaded rod 431 is fixedly connected to the first vibration isolator 42, and the other end of the first threaded rod 431 is coaxially arranged with a second threaded rod 432. A gap is left between the second threaded rod 432 and the first threaded rod 431, and a threaded sleeve 433 is provided between the first threaded rod 431 and the second threaded rod 432. The threaded sleeve 433 is fitted over the outside of the first threaded rod 431 and the second threaded rod 432, with one end of the threaded rod threaded to the first threaded rod 431 and the other end threaded to the second threaded rod 432. By rotating the threaded sleeve 433, the threaded sleeve 433 drives the opposing first threaded rod 431 and the second threaded rod 432 to move towards each other or away from each other, thus adjusting the overall length of the telescopic adjustment component 43.

[0036] A tie rod base 44 is provided on the side of the second threaded rod 432 near the pump unit 3, and the tie rod base 44 is fixedly connected to the pump unit 3. The tie rod base 44 includes a housing, and a pull hole is provided inside the housing. The pull hole includes a receiving portion located inside the tie rod base 44. A connecting portion is provided on the side of the receiving portion near the second threaded rod 432 of the tie rod base 44. The connecting portion is in communication with the receiving portion, and the other end of the connecting portion is in communication with the outside. The opening area of ​​the connecting portion is smaller than the opening area of ​​the receiving portion.

[0037] The end of the second threaded rod 432 extends from the connecting part into the interior of the receiving part, and a clamping plate is fixedly connected to the second threaded rod 432 at the position of the receiving part. The diameter of the clamping plate is larger than the diameter of the connecting part, so that the clamping plate is engaged in the interior of the connecting part, thereby connecting the second threaded rod 432 to the pull rod base 44.

[0038] In some embodiments, multiple sets of telescopic adjustment members 43 are provided in a first direction, and multiple sets of telescopic adjustment members 43 are provided in a second direction.

[0039] First, complete the installation of the second vibration isolator 2 of pump unit 3 and pump unit 3 feet on the vibration reduction platform 1;

[0040] After the pump set 3 is installed and left to stand for 48 hours, and after the second vibration isolator 2 of the pump set 3 foot is fully deformed, the pipeline system will be installed.

[0041] Install the pipeline and pipeline anchors. After the pipeline installation is completed and left to stand for 48 hours, and after the pipeline anchors have fully deformed, the center line of the pipeline is basically aligned with the center line of the pump inlet and outlet. Then install the inlet and outlet flexible connection of pump unit 3.

[0042] Complete the installation of the inlet and outlet flanges of pump unit 3 and the balanced flexible connecting pipes of the system pipeline. When installing the balanced flexible connecting pipes, the balanced flexible connecting pipes should be in a natural, stress-free state.

[0043] After completing the installation of the telescopic adjustment component 43 with the first vibration isolator 42 with low stiffness, and according to the height position of the pump group 3, the mounting holes of the first vibration isolator 42 of the telescopic adjustment component 43 are located on site and the mounting holes are processed; then the installation of the first vibration isolator 42 and the telescopic adjustment component 43 is completed, the external threaded sleeve 433 is adjusted, and the distance between the first threaded rod 431 and the second threaded rod 432 is adjusted so that the pump source is in a vertical state;

[0044] After completing the commissioning of the telescopic adjustment component 43 with low stiffness vibration isolator, the pump unit 3 is operated according to the temperature, pressure and flow parameters of the design conditions. According to the operating status of the pump unit 3, the external threaded sleeve 433 is adjusted to keep the pump source in a vertical position. After running continuously for 48 hours, the vibration isolator at the telescopic adjustment component 43 is fully deformed, and the pump source is still in a vertical position. Then the installation and commissioning are completed.

[0045] In this application, the term "multiple" refers to at least two or more, unless otherwise expressly defined. The terms "installed," "connected," "linked," and "fixed," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "linked" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0046] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

Claims

1. A low-noise compensation structure for the installation posture of a pump source in a ship's high-pressure pipeline system under operating conditions, characterized in that: It includes a pump set (3), and a balanced flexible connecting pipe is fixedly connected to the inlet and outlet pipes of the pump set (3). A vibration damping platform (1) is provided on the pump set (3), and a vertical adjustment component (4) is provided on the vibration damping platform (1) relative to the pump set (3). The vertical adjustment component (4) restricts the pump set (3) to be in a vertical state. The vertical adjustment component (4) includes a vertically arranged base (41). Multiple bases (41) are arranged on the vibration damping platform (1). The bases (41) are respectively located in the first direction and the second direction of the pump group (3). The first direction and the second direction are horizontally perpendicular. A telescopic adjustment component (43) is arranged between the base (41) and the pump group (3). One end of the telescopic adjustment component (43) is connected to the base (41), and the other end of the telescopic adjustment component (43) is connected to the pump group (3). A first vibration isolator (42) is fixedly connected to the base (41) relative to the telescopic adjustment component (43), and the first vibration isolator (42) is connected to the telescopic adjustment component (43); The telescopic adjustment component (43) includes a first threaded rod (431), the end of which is fixedly connected to the first vibration isolator (42). A second threaded rod (432) is provided on the side of the first threaded rod (431) near the pump group (3). The first threaded rod (431) and the second threaded rod (432) are coaxially arranged. A threaded sleeve (433) is provided between the first threaded rod (431) and the second threaded rod (432). The threaded sleeve (433) is threadedly connected to the first threaded rod (431) and to the second threaded rod (432). A gap is left between the first threaded rod (431) and the second threaded rod (432). The pump unit (3) is fixedly connected to a tie rod base (44) relative to the second threaded rod (432), and the tie rod base (44) is connected to the second threaded rod (432); The pull rod base (44) includes a housing, and a pull hole is provided inside the housing. The pull hole includes a connecting part that communicates with the outside. A receiving part is provided on the side of the connecting part near the pump group (3). A clamping plate is fixedly connected to the end of the second threaded rod (432). The clamping plate is located in the receiving part. The vertical cross-sectional area of ​​the clamping plate is larger than the opening of the connecting part. Multiple sets of the telescopic adjustment component (43) are provided in the first direction, and multiple sets of the telescopic adjustment component (43) are provided in the second direction.

2. The low-noise compensation structure for the pump source operation of a ship high-pressure pipeline system according to claim 1, characterized in that: The vibration damping platform (1) has a through hole, and the pump group (3) passes through the through hole. A second vibration isolator (2) is fixedly connected to the side wall of the pump group (3). The second vibration isolator (2) is fixedly connected to the vibration damping platform (1). The vibration damping platform (1) has a gap relative to the pump group (3).

3. The low-noise compensation structure for the pump source operation mode of the ship's high-pressure pipeline system according to claim 2, characterized in that: The actual load borne by the second vibration isolator (2) is not less than 80% of the rated load of the second vibration isolator (2).

4. The low-noise compensation structure for the pump source operation of the ship high-pressure pipeline system according to claim 2, characterized in that: Multiple second vibration isolators (2) are provided, and the sum of the dynamic stiffness of the multiple second vibration isolators (2) is k1. The radial dynamic stiffness of the balanced flexible pipe is not greater than 1 / 10 of the sum of the dynamic stiffness of the multiple second vibration isolators (2) k1.

Images