Seawater pressure compensation device for damping thrust bearing

Abstract

The invention relates to the technical field of damping thrust bearings of submersible vehicles, in particular to a seawater pressure compensation device for a damping thrust bearing. According to the seawater pressure compensation device structure, the external environment water pressure of the submersible vehicle can be flexibly conducted to an internal hydraulic system, hydrostatic thrust balance of the vibration reduction thrust bearing is achieved, and the seawater pressure compensation device structure has important significance on full-depth effective vibration reduction of the vibration reduction thrust bearing; the seawater pressure compensation device has displacement monitoring and alarming functions, an operator can be timely and effectively reminded, and function loss of the compensation device caused by pipeline corrosion and leakage in the external environment water pressure transmission process is avoided; the self-sealing submersible vehicle has a self-sealing function under extreme conditions of pipeline damage and the like, and can prevent a large amount of water from entering the submersible vehicle under the extreme conditions to damage the use safety of the submersible vehicle.

Description

Technical Field

[0001] The invention relates to the technical field of submersible vibration-damping thrust bearings, and in particular to a seawater pressure compensating device for a vibration-damping thrust bearing. Background Art

[0002] The vibration-damping thrust bearing is the core equipment for controlling the longitudinal vibration of the shafting. It not only transmits the torque in both the forward and reverse directions of the shafting, the thrust and tension of the forward and reverse driving, but also can attenuate the alternating excitation force components in the process of thrust transmission of the shafting, avoid the transmission of the shafting vibration to the hull structure and cause radiated noise, and realize the effective control of the longitudinal vibration of the shafting.

[0003] For submersibles, as the diving depth increases, the static thrust of the shaft system caused by seawater pressure accounts for an increasing proportion of the thrust design thrust of the thrust bearing, which increases the thrust design index of the thrust bearing. The longitudinal vibration reduction design of the shaft system requires the longitudinal stiffness of the vibration reduction thrust bearing to be as low as possible. The two parameters of high thrust and low stiffness will lead to a significant increase in the longitudinal movement of the shaft system, which will bring huge risks to the safe operation of other equipment in the shaft system (such as sealing devices, propellers, etc.).

[0004] The application of hydrostatic thrust balancing technology on vibration-damping thrust bearings is one of the technical measures to solve the problem of excessive static thrust on the thrust bearing vibration-damping elements. The difficulty in applying the existing hydrostatic thrust balancing technology lies in how to flexibly transmit the external water pressure of the submersible to the inside of the thrust bearing, while ensuring that the offboard seawater does not cause corrosion damage to the internal structure of the thrust bearing, and preventing problems such as pipe damage and leakage in extreme cases such as pipeline breakage. Summary of the invention

[0005] The technical problem to be solved by the present invention is: to propose a seawater pressure compensation device for a vibration-damping thrust bearing, which can realize the flexible transmission of the external water pressure of the submersible to the inside of the thrust bearing, and can avoid the corrosion damage of the external seawater to the internal structure of the bearing, and has a self-sealing function in extreme situations such as pipeline damage, which can effectively prevent the submersible from taking in a large amount of water.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0007] A seawater pressure compensation device for a vibration-damping thrust bearing, comprising an inner cavity 13 formed by connecting a left end cover 1 and a right end cover 6, a piston 4 and a diaphragm 5 in the inner cavity 13, the connecting surface of the left end cover 1 and the right end cover 6 tightly fixes the outer cylindrical surface of the diaphragm 5, the middle part of the diaphragm 5 is fixedly connected to the piston 4 through a connecting piece, the diaphragm 5 is a rubber film material, and the diaphragm 5 divides the inner cavity 13 into a left liquid cavity and a right liquid cavity, the piston 4 is slidably arranged in the left liquid cavity, and a plurality of through holes 16 for liquid circulation are opened on the end surface of the piston 4 along the axial direction;

[0008] A hydraulic connecting pipe 17 is provided at the end of the left end cover 1, one end of which is connected to the hydraulic pipeline through a threaded joint, and the other end is connected to the left liquid chamber; a seawater connecting pipe 18 is provided at the end of the right end cover 6, one end of which is connected to the seawater pipeline through a flange, and the other end is connected to the right liquid chamber.

[0009] Furthermore, a scale rod 8 is axially provided at the bottom of the outer wall of the left end cover 1, the scale rod 8 is marked with a diaphragm position scale, and a sliding magnetic ring 10 is sleeved on the scale rod 8, and a magnet 9 matching the sliding magnetic ring 10 is embedded on the outer circumferential surface of the piston 4.

[0010] Furthermore, a plurality of guide rings 3 are provided on the surface of the piston 4 in contact with the inner cavity 13, and the diaphragm 5 is used to transmit the pressure of the liquid cavities on both sides. When the liquid pressures on both sides of the diaphragm 5 are different, the diaphragm 5 will drive the piston 4 to slide along the inner cavity 13 toward the side with lower pressure.

[0011] Furthermore, an oil filling port 12 is opened on the side wall of the hydraulic connecting pipe 17, and the oil filling port 12 is blocked by a sealing plug 2 under normal working conditions. When the hydraulic pipeline leaks and needs oil replenishment, the sealing plug 2 is opened and hydraulic oil is added through the oil filling port 12.

[0012] Furthermore, a positioning groove 14 is provided at one end of the hydraulic connecting pipe 17 close to the left liquid chamber, a positioning column matching the positioning groove 14 is provided at one end of the piston 4 facing the hydraulic connecting pipe 17, and an O-ring 15 is provided on the outer circumferential surface of the positioning column.

[0013] Furthermore, an in-place sensor 7 is installed on the end face of the left end cover 1. When the hydraulic pipeline leaks and the pressure in the left liquid chamber decreases, the diaphragm 5 drives the piston 4 to move to the left along the inner cavity 13, so that the positioning column is inserted into the positioning groove 14 to block the hydraulic pipeline and trigger the in-place sensor 7. The in-place sensor 7 sends an alarm signal to prompt the operator to check the hydraulic pipeline and add oil.

[0014] Furthermore, the pressure transmission capacity of the diaphragm 5 satisfies that the pressure difference between the two sides of the diaphragm is not greater than 1%.

[0015] Furthermore, the left end cover 1 and the right end cover 6 are both made of titanium alloy.

[0016] Compared with the prior art, the present invention has the following main advantages:

[0017] 1. The seawater pressure compensation device structure proposed in the present invention can flexibly transmit the external environmental water pressure of the submersible to the internal hydraulic system and realize the hydrostatic thrust balance of the vibration-reducing thrust bearing, which is of great significance for achieving effective vibration reduction of the vibration-reducing thrust bearing at full depth;

[0018] 2. The seawater pressure compensation device of the present invention is provided with displacement monitoring and alarm functions, which can timely and effectively remind the operator to avoid the loss of function of the compensation device due to pipeline corrosion and leakage during the transmission of external environmental water pressure;

[0019] 3. The present invention has a self-sealing function in extreme situations such as pipeline damage, which can prevent a large amount of water from entering the submersible in extreme situations and endangering the safety of the submersible. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the diaphragm of the seawater pressure compensation device for the vibration-damping thrust bearing of the present invention being in a normal position;

[0021] Figure 2 It is a schematic diagram of the diaphragm of the seawater pressure compensation device of the present invention being in the allowable limit position of the initial installation;

[0022] Figure 3 It is a schematic diagram showing that the diaphragm of the seawater pressure compensation device of the present invention is at the water leakage alarm limit position.

[0023] In the figure: 1-left end cover, 2-sealing plug, 3-guide ring, 4-piston, 5-diaphragm, 6-right end cover, 7-in-place sensor, 8-scale rod, 9-magnet, 10-magnetic ring, 11-fastener, 12-oil filling port, 13-inner cavity, 14-positioning groove, 15-O-ring, 16-through hole, 17-hydraulic connecting pipe, 18-seawater connecting pipe. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0025] It should be pointed out that, according to the needs of implementation, the various steps / components described in this application can be split into more steps / components, and two or more steps / components or partial operations of steps / components can be combined into new steps / components to achieve the purpose of the present invention.

[0026] Embodiment 1: This embodiment provides a seawater pressure compensation device for a vibration-damping thrust bearing, such as Figures 1 to 3As shown, it includes an inner cavity 13 formed by connecting a left end cover 1 and a right end cover 6, a piston 4 and a diaphragm 5 in the inner cavity 13, the connecting surface of the left end cover 1 and the right end cover 6 presses and fixes the outer cylindrical surface of the diaphragm 5, the middle part of the diaphragm 5 is fixedly connected to the piston 4 through a connecting piece, the diaphragm 5 is a rubber film material, and the diaphragm 5 divides the inner cavity 13 into a left liquid cavity and a right liquid cavity, the piston 4 is slidably arranged in the left liquid cavity, and a plurality of through holes 16 for liquid circulation are opened on the end surface of the piston 4 along the axial direction;

[0027] Among them, a hydraulic connecting pipe 17 is provided at the end of the left end cover 1, one end of the hydraulic connecting pipe 17 is connected to the hydraulic pipeline through a threaded joint, and the other end is connected to the left liquid chamber; a seawater connecting pipe 18 is provided at the end of the right end cover 6, one end of the seawater connecting pipe 18 is connected to the seawater pipeline through a flange, and the other end is connected to the right liquid chamber.

[0028] Furthermore, a scale rod 8 is axially provided at the bottom of the outer wall of the left end cover 1, the scale rod 8 is marked with a diaphragm position scale, and a sliding magnetic ring 10 is sleeved on the scale rod 8, and a magnet 9 matching the sliding magnetic ring 10 is embedded on the outer circumferential surface of the piston 4.

[0029] Furthermore, a plurality of guide rings 3 are provided on the surface of the piston 4 in contact with the inner cavity 13, and the diaphragm 5 is used to transmit the pressure of the liquid cavities on both sides. When the liquid pressures on both sides of the diaphragm 5 are different, the diaphragm 5 will drive the piston 4 to slide along the inner cavity 13 toward the side with lower pressure.

[0030] Furthermore, an oil filling port 12 is opened on the side wall of the hydraulic connecting pipe 17, and the oil filling port 12 is blocked by a sealing plug 2 under normal working conditions. When the hydraulic pipeline leaks and needs oil replenishment, the sealing plug 2 is opened and hydraulic oil is added through the oil filling port 12.

[0031] Furthermore, a positioning groove 14 is provided at one end of the hydraulic connecting pipe 17 close to the left liquid chamber, a positioning column matching the positioning groove 14 is provided at one end of the piston 4 facing the hydraulic connecting pipe 17, and an O-ring 15 is provided on the outer circumferential surface of the positioning column.

[0032] Furthermore, an in-place sensor 7 is installed on the end face of the left end cover 1. When the hydraulic pipeline leaks and the pressure in the left liquid chamber decreases, the diaphragm 5 drives the piston 4 to move to the left along the inner cavity 13, so that the positioning column is inserted into the positioning groove 14 to block the hydraulic pipeline and trigger the in-place sensor 7. The in-place sensor 7 sends an alarm signal to prompt the operator to check the hydraulic pipeline and add oil.

[0033] Furthermore, the pressure transmission capacity of the diaphragm 5 satisfies that the pressure difference between the two sides of the diaphragm is not greater than 1%.

[0034] Furthermore, the left end cover 1 and the right end cover 6 are both made of titanium alloy.

[0035] Embodiment 2: This embodiment provides a seawater pressure compensation device for a vibration-damping thrust bearing, which mainly includes: a left end cover 1, a sealing plug 2, a guide ring 3, a piston 4, a diaphragm 5, a right end cover 6, an in-position sensor 7, a scale rod 8, a magnet 9, a magnetic ring 10, a fastener 11, etc.

[0036] The left end cover 1 and the right end cover 6 press the outer circumferential surface of the diaphragm 5 through the mounting surface to achieve the outer circumferential fixation of the diaphragm 5; the center of the diaphragm 5 is fixedly connected to the piston 4 through a connecting piece; the piston 4 is installed inside the left end cover 1, and two sets of guide rings 3 are arranged on the outer circumferential surface; the left end cover 1 is connected to the hydraulic pipeline through a threaded joint, and an oil filling port 12 is arranged on the connecting pipeline, which is closed by a sealing plug 2, and an in-position sensor 7 is arranged on the end surface of the left end cover 1, and a scale rod 8 is fixed on the left end cover, and a magnetic ring 10 is installed on the scale rod 8; the right end cover 6 is connected to the seawater pipeline through a flange;

[0037] The left end cover 1 and the right end cover 6 are the pressure-bearing boundaries of the seawater pressure compensation device, which realize the isolation of the internal high-pressure liquid environment and the external normal-pressure air environment. The piston 4 and the diaphragm 5 are both arranged in the inner cavity 13 formed by the left end cover 1 and the right end cover 6, and can move flexibly, forming the internal liquid cavity boundary of the seawater pressure compensation device.

[0038] Furthermore, the diaphragm 5 divides the inner cavity 13 of the seawater pressure compensation device into two left and right liquid cavities. The left liquid cavity of the diaphragm 5 is filled with hydraulic oil, and the right side of the diaphragm 5 is connected to the submersible external seawater system through a pipeline. The diaphragm 5 is a rubber film material with sensitive pressure transmission ability, achieving a pressure difference of no more than 1% on both sides of the diaphragm, and can effectively isolate the left and right liquid cavity environments to prevent seawater from invading the hydraulic oil system.

[0039] Furthermore, the piston 4 is fixedly connected to the diaphragm 5 through a connecting piece, and two groups of guide rings 3 are arranged on the outer circle of the piston 4, and a number of through holes are arranged inside along the axial direction to reduce the weight of the piston and ensure the circulation of hydraulic oil. A small magnet 9 is embedded in the outer circle of the piston 4, and a scale rod 8 is fixed on the outer side of the left end cover 1 of the compensation device. The scale rod 8 is marked with a diaphragm position scale, and a flexibly movable magnetic ring 10 is arranged on it. This arrangement can realize that when the volume of the left lubricating oil chamber changes, the piston 4 and the diaphragm 5 move synchronously, and the magnetism of the magnet 9 on the piston 4 will drive the external magnetic ring 10 to move, and then the relative movement position of the diaphragm is displayed on the outside of the device, providing the operator with a diaphragm position judgment.

[0040] Furthermore, a positioning groove 14 is designed on the inner side of the left end cover 1, and a protruding cylinder is designed on the left end of the piston 4. An O-ring 15 is arranged on the outer circle of the protruding cylinder to form a matching surface with the positioning groove 14 of the left end cover 1. This design can ensure that when a large amount of hydraulic oil leaks from the left side of the compensation device, the piston 4 can quickly move to the left under the action of seawater pressure, so that the protruding cylinder is pressed into the positioning groove, and the seawater pressure compensation device is sealed to the cabin, which can quickly block the rapid influx of seawater pressure outside the submersible into the cabin through the compensation device, and ensure the safety of the pressure boundary of the submersible.

[0041] Furthermore, an oil filling port 12 is provided on the left end cover 1, and the oil filling port is blocked by the sealing plug 2 during daily operation. When hydraulic oil leakage occurs in the pipeline and oil replenishment is required, the sealing plug 2 is opened and hydraulic oil is added through the oil filling port 12 to ensure that the diaphragm is in the normal working area.

[0042] Furthermore, the left end cover 1 and the right end cover 6 are made of titanium alloy, which has good seawater corrosion resistance and is also a non-magnetic material, which can ensure non-contact transmission of the magnetic field of the magnet 9 to the magnetic ring 10.

[0043] Furthermore, a position sensor 7 is provided on the contact end surface between the left end cover 1 and the piston 4. Figure 3 As shown, when the piston moves to the limit position, the in-position sensor 7 will send out an audible and visual alarm signal to prompt the operator to check and replenish the hydraulic oil chamber in time to prevent the pressure conduction function of the seawater pressure compensation device from failing.

[0044] Furthermore, all parts involved in this application that are not described in detail are the same as the prior art or are implemented using the prior art.

[0045] In summary:

[0046] 1. The seawater pressure compensation device structure proposed in the present invention can flexibly transmit the external environmental water pressure of the submersible to the internal hydraulic system and realize the hydrostatic thrust balance of the vibration-reducing thrust bearing, which is of great significance for achieving effective vibration reduction of the vibration-reducing thrust bearing at full depth;

[0047] 2. The seawater pressure compensation device of the present invention is provided with displacement monitoring and alarm functions, which can timely and effectively remind the operator to avoid the loss of function of the compensation device due to pipeline corrosion and leakage during the transmission of external environmental water pressure;

[0048] 3. The present invention has a self-sealing function in extreme situations such as pipeline damage, which can prevent a large amount of water from entering the submersible in extreme situations and endangering the safety of the submersible.

[0049] It will be easily understood by those skilled in the art that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A seawater pressure compensation device for a vibration-damping thrust bearing, characterized in that: The invention comprises an inner cavity (13) formed by connecting a left end cover (1) and a right end cover (6), a piston (4) and a diaphragm (5) in the inner cavity (13), the connecting surfaces of the left end cover (1) and the right end cover (6) are pressed and fixed to the outer circumferential surface of the diaphragm (5), the middle part of the diaphragm (5) is fixedly connected to the piston (4) through a connecting piece, the diaphragm (5) is a rubber film material, and the diaphragm (5) divides the inner cavity (13) into a left liquid cavity and a right liquid cavity, the piston (4) is slidably arranged in the left liquid cavity, and a plurality of through holes (16) for liquid circulation are opened along the axial direction on the end surface of the piston (4); The end of the left end cover (1) is provided with a hydraulic connecting pipe (17), one end of which is connected to the hydraulic pipeline via a threaded joint, and the other end is communicated with the left liquid chamber; the end of the right end cover (6) is provided with a seawater connecting pipe (18), one end of which is connected to the seawater pipeline via a flange, and the other end is communicated with the right liquid chamber.

2. The seawater pressure compensation device for a vibration-damping thrust bearing according to claim 1, characterized in that: A scale rod (8) is axially arranged at the bottom of the outer wall of the left end cover (1), the scale rod (8) is marked with a diaphragm position scale, and a sliding magnetic ring (10) is sleeved on the scale rod (8), and a magnet (9) matching the sliding magnetic ring (10) is embedded on the outer circumferential surface of the piston (4).

3. The seawater pressure compensation device for a vibration-damping thrust bearing according to claim 1, characterized in that: A plurality of guide rings (3) are provided on the surface of the piston (4) in contact with the inner cavity (13); the diaphragm (5) is used to transmit the pressure of the liquid cavities on both sides; when the liquid pressures on both sides of the diaphragm (5) are different, the diaphragm (5) will drive the piston (4) to slide along the inner cavity (13) toward the side with lower pressure.

4. The seawater pressure compensation device for a vibration-damping thrust bearing according to claim 3, characterized in that: The side wall of the hydraulic connecting pipe (17) is provided with an oil filling port (12), and the oil filling port (12) is blocked by a sealing plug (2) under normal working conditions. When the hydraulic pipeline leaks and needs oil replenishment, the sealing plug (2) is opened and hydraulic oil is added through the oil filling port (12).

5. The seawater pressure compensation device for a vibration-damping thrust bearing according to claim 4, characterized in that: A positioning groove (14) is provided at one end of the hydraulic connecting pipe (17) close to the left liquid chamber, a positioning column matching the positioning groove (14) is provided at one end of the piston (4) facing the hydraulic connecting pipe (17), and an O-type sealing ring (15) is provided on the outer circumferential surface of the positioning column.

6. The seawater pressure compensation device for a vibration-damping thrust bearing according to claim 5, characterized in that: An in-place sensor (7) is installed on the end surface of the left end cover (1). When the hydraulic pipeline leaks and the pressure in the left liquid chamber decreases, the diaphragm (5) drives the piston (4) to move to the left along the inner cavity (13), so that the positioning column is inserted into the positioning groove (14) to block the hydraulic pipeline and trigger the in-place sensor (7). The in-place sensor (7) sends an alarm signal to prompt the operator to check the hydraulic pipeline and add oil.

7. The seawater pressure compensation device for a vibration-damping thrust bearing according to claim 3, characterized in that: The pressure transmission capacity of the diaphragm (5) satisfies that the pressure difference between the two sides of the diaphragm is no more than 1%.

8. The seawater pressure compensation device for a vibration-damping thrust bearing according to claim 1, characterized in that: The left end cover (1) and the right end cover (6) are both made of titanium alloy.

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