Diaphragm type pressure compensator for underwater hydraulic system
By adopting an annular flow channel and multiple oil return ports in the pressure compensator of the underwater hydraulic system, combined with the suction pipe and screw fixing structure, the problems of bubble suction and structure are solved, and efficient exhaust and compact structure are achieved, which is easy to install and replace spare parts.
Patent Information
- Application Number
- CN202421725266.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-19
- Publication Date
- 2025-05-13
- Estimated Expiration
- 2034-07-19
AI Technical Summary
When the pressure compensator of the existing underwater hydraulic system is connected to the open or closed system, it is easy to cause bubbles to be sucked into the hydraulic system, and the structure is bulky and not versatile, making it difficult to meet the needs of diverse underwater hydraulic systems.
A diaphragm pressure compensator is designed, adopting an annular flow channel and multiple oil return ports. The liquid level with bubbles and the liquid level without bubbles is separated through the oil suction pipe, improving exhaust efficiency, and fixing the structure through a screw to ensure coaxiality and compactness.
It achieves efficient exhaust, compact structure, easy installation and spare parts replacement, strong versatility, and adapts to the needs of diverse underwater hydraulic systems.
Smart Images
Figure CN222863758U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of pressure compensators, in particular to a diaphragm pressure compensator for an underwater hydraulic system. Background Art
[0002] my country has a vast ocean area and abundant marine resources. How to effectively detect, exploit and utilize these marine resources is an urgent problem to be solved in my country. Having advanced detection and exploitation equipment is the first element to achieve this goal. To achieve the above goals, my country is vigorously developing various types of marine detection and operation equipment, including various ROVs, AUVs, manned submersibles, deep-sea trenchers, mining machines, cable laying machines, deep-sea oil detection and exploitation equipment, deep-sea maintenance equipment, etc. Hydraulic technology has the characteristics of high power density and easy pressure compensation. Therefore, the above-mentioned marine equipment generally adopts hydraulic drive to achieve operation tasks, and the pressure compensator of the hydraulic system is the key to the normal operation of the underwater hydraulic system. At present, the commonly used pressure compensators are bladder type, bellows type, rolling diaphragm type, piston type and air spring type. Although the forms are different, the basic working principles are the same. The bladder and rubber diaphragm type have good flexibility, fast response, compact structure and good sealing effect. They are widely used in deep-sea pressure compensators, but the compensation volume is small and not suitable for large underwater hydraulic systems. The piston type structure is large in size, slow in response, and has a dynamic seal structure with poor sealing reliability, but it can achieve large volume compensation. The air spring type structure is large in size, moderate in response speed, has no dynamic seal problem, and can achieve large volume compensation. At present, the compensators of underwater hydraulic systems on the market are connected to open or closed systems. Due to space limitations, the oil suction and return interfaces are set at the same height. In actual application, it is easy to cause the bubbles discharged back to the pressure compensator in the hydraulic system to be quickly sucked back into the hydraulic system. In addition, the conventional compensator structure is relatively bulky, the technical versatility is not strong, and it is difficult to adapt to the diverse needs of underwater hydraulic systems. Utility Model Content
[0003] The purpose of the utility model is to overcome the shortcomings of the prior art and provide a diaphragm pressure compensator for an underwater hydraulic system which is conducive to exhaust, convenient for installation and replacement of spare parts, has strong versatility and compact structure.
[0004] The utility model is realized through the following technical scheme: a diaphragm pressure compensator for an underwater hydraulic system, comprising an upper shell, a lower shell, a displacement sensor, an inner liner, a diaphragm, and a leather liner. A top cover is arranged on the top side of the upper shell, the upper shell and the lower shell are connected by a connecting flange, a bottom cover is arranged on the bottom side of the lower shell, the inner liner is arranged in the upper shell, the inner liner has an annular guide groove, an oil return through hole for filling oil is arranged on a boss at the center of the annular guide groove, a plurality of oil return ports distributed in annular intervals are arranged on the top cover, the oil return port is directly opposite to the annular guide groove, an oil suction port is arranged on the top cover, an oil suction pipe is arranged in the oil suction port, and the oil suction pipe extends to the The annular guide groove, the diaphragm and the leather lining are located between the upper shell and the lower shell, and the top of the diaphragm is fixed to the connecting flange, the bottom of the diaphragm is pressed on the top of the leather lining through the leather cover, the leather lining has an annular sealing groove, the bottom cover has an annular mounting groove, a spring is arranged between the annular sealing groove and the annular mounting groove, a seawater through hole for passing seawater is opened on the boss at the center of the annular mounting groove, a guide sleeve is arranged in the leather lining, the guide sleeve extends to the outside of the seawater through hole, the displacement sensor is arranged on the top cover, and the side rod of the displacement sensor passes through the oil return through hole, the leather cover and the diaphragm in sequence, and is inserted into the guide sleeve through the magnetic ring.
[0005] Furthermore: the lining is fixed to the top cover by screws.
[0006] Furthermore: the connecting flange is divided into an upper flange and a lower flange, the lower flange is provided with a fixing groove, the top end of the diaphragm is clamped in the fixing groove and is pressed by the upper flange.
[0007] Furthermore: the upper flange and the lower flange are fixed by bolts.
[0008] Furthermore: it also includes a plurality of screw rods distributed at circumferential intervals, each of the screw rods passes through the top cover, the upper flange, and the lower flange in sequence from top to bottom, and is finally fixed on the bottom cover.
[0009] Furthermore: the liner is a cylindrical structure, and the annular guide groove is located at the bottom center of the liner.
[0010] Furthermore: the leather lining is a cylindrical structure with an open bottom end, the annular sealing groove is located on the inner side of the top end of the leather lining, and the guide sleeve is located at the center of the annular sealing groove.
[0011] Furthermore: the leather cover and the leather lining are both made of engineering plastics.
[0012] Furthermore: the upper shell and the lower shell are both made of transparent engineering plastics.
[0013] Furthermore: the leather cover, the diaphragm and the leather lining are fixed by screws.
[0014] Compared with the prior art, the utility model has the following beneficial effects:
[0015] 1. An annular guide groove is provided at the bottom of the liner, an oil return through hole is provided on a boss at the center of the annular guide groove, a plurality of oil return ports are provided on the top cover and are distributed at circumferential intervals, and the oil return ports are directly opposite to the annular guide groove, an oil suction port is provided on the top cover, an oil suction pipe is provided in the oil suction port, and the oil suction pipe extends to the annular guide groove. In the process of oil return to the oil chamber, since all the oil return ports are directly opposite to the annular guide groove, when the fluid containing bubbles in the returned oil flows back to the oil chamber, the fluid first flows from the oil return port to the annular guide groove, and then overflows from the annular guide groove to the oil chamber. When the fluid flows from the oil return port to the annular guide groove, the fluid will impact the annular guide groove and then be guided to the top of the liner. Since the bubbles are lighter, they will be maintained at a position higher than the top of the liner. At the same time, since the oil suction pipe extends to the annular guide groove, the oil suction pipe will suck oil from a deeper depth, separate the liquid level with bubbles and the liquid level without bubbles, thereby improving the exhaust efficiency and having a compact structure.
[0016] 2. By passing each screw through the top cover, upper flange, lower flange from top to bottom in sequence and finally fixing it on the bottom cover, the coaxiality of the top cover, upper flange, lower flange and bottom cover can be controlled, thereby controlling the coaxiality of the lower shell and upper shell.
[0017] 3. The steel lining is used as a high-strength structural member to withstand the combined force from the extension of the bottom spring and the external pressure. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 It is a top view of the utility model;
[0019] Figure 2 for Figure 1 Section view at AA;
[0020] Figure 3 This is the internal structure diagram of the utility model.
[0021] Explanation of the reference numerals: 1-upper shell, 2-lower shell, 3-displacement sensor, 4-lining, 5-diaphragm, 6-leather lining, 7-top cover, 8-connecting flange, 9-bottom cover, 10-annular guide groove, 11-oil return hole, 12-oil return port, 13-oil suction port, 14-oil suction pipe, 15-leather cover, 16-annular sealing groove, 17-annular mounting groove, 18-spring, 19-seawater hole, 20-guide sleeve, 21-side rod, 22-magnetic ring, 23-screw, 24-upper flange, 25-lower flange, 26-fixing groove, 27-bolt, 28-screw, 29-screw, 30-oil chamber, 31-water chamber. DETAILED DESCRIPTION
[0022] Figures 1 to 3 A schematic diagram of the structure of an embodiment of a diaphragm pressure compensator for an underwater hydraulic system provided by the utility model includes an upper shell 1, a lower shell 2, a displacement sensor 3, an inner liner 4, a diaphragm 5, and a leather liner 6. A top cover 7 is provided on the top side of the upper shell 1. The upper shell 1 and the lower shell 2 are connected by a connecting flange 8. A bottom cover 9 is provided on the bottom side of the lower shell 2. The inner liner 4 is provided in the upper shell 1. The inner liner 4 has an annular guide groove 10. An oil return through hole 11 for returning oil is provided on a boss at the center of the annular guide groove 10. A plurality of oil return ports 12 are provided on the top cover 7 and are distributed in an annular manner. The oil return ports 12 are directly opposite to the annular guide groove 10. An oil suction port 13 is provided on the top cover 7. An oil suction pipe 14 is provided in the oil suction port 13. The oil suction pipe 14 extends To the annular guide groove 10, the diaphragm 5 and the leather lining 6 are located between the upper shell 1 and the lower shell 2, and the top of the diaphragm 5 is fixed to the connecting flange 8, the bottom of the diaphragm 5 is pressed on the top of the leather lining 6 through the leather cover 15, the leather lining 6 has an annular sealing groove 16, the bottom cover 9 has an annular mounting groove 17, a spring 18 is arranged between the annular sealing groove 16 and the annular mounting groove 17, a seawater through hole 19 for passing seawater is provided on the boss at the center of the annular mounting groove 17, a guide sleeve 20 is arranged in the leather lining 6, and the guide sleeve 20 extends to the outside of the seawater through hole 19, the displacement sensor 3 is arranged on the top cover 7, and the side rod 21 of the displacement sensor 3 passes through the return oil through hole 11, the leather cover 15, and the diaphragm 5 in sequence, and is inserted into the guide sleeve 20 through the magnetic ring 22.
[0023] The oil suction pipe 14 can be fixed in the oil suction port 13 by welding or threading, or the oil suction pipe 14 and the top cover 7 can be made in one piece.
[0024] The inner liner 4 is made of steel material.
[0025] The area between the diaphragm 5 and the inner lining 4 is an oil chamber 30 , and the area between the leather lining 6 and the bottom cover 9 is a water chamber 31 .
[0026] Working principle: At the initial position, when there is still air in the oil chamber 30, seawater is introduced into the water chamber 31 through the seawater through hole 19. Due to the pressure of the seawater, the spring 18 is compressed, so that the leather lining 6 is in the highest position. At this time, the oil return port 12 is filled with oil, and the oil enters the annular guide groove 10 through the oil return port 12. As the oil increases, the oil overflows the annular guide groove 10 and then enters the oil chamber 30 from the oil return through hole 11. During the process of continuing to return the oil, the diaphragm 5 will move downward together with the leather lining 6 until the oil chamber 30 is filled with oil.
[0027] In this embodiment, all the oil return ports 12 are facing the annular guide groove 10. When the fluid containing bubbles in the return oil flows back to the oil chamber 30, it will be guided to the top of the liner 4 after impacting the annular guide groove 10. Since the bubbles are lighter, they will be maintained at a higher position from the top of the liner 4. At the same time, since the oil suction pipe 14 extends to the annular guide groove 10, the oil suction pipe 14 will suck oil from a deeper depth and separate the liquid level with bubbles from the liquid level without bubbles, thereby improving the exhaust efficiency.
[0028] The lining 4 is fixed by screws 23 and the top cover 7 .
[0029] The connecting flange 8 is divided into an upper flange 24 and a lower flange 25 . The lower flange 25 is provided with a fixing groove 26 . The top end of the diaphragm 5 is clamped in the fixing groove 26 and is pressed by the upper flange 24 .
[0030] The upper flange 24 and the lower flange 25 are fixed by bolts 27 .
[0031] This embodiment further includes a plurality of screw rods 28 distributed at circumferential intervals. Each screw rod 28 passes through the top cover 7 , the upper flange 24 , and the lower flange 25 in sequence from top to bottom, and is finally fixed on the bottom cover 9 .
[0032] By fastening and installing the screw 28 , the coaxiality of the top cover 7 , the upper flange 24 , the lower flange 25 , and the bottom cover 9 can be controlled, thereby controlling the coaxiality of the lower shell 2 and the upper shell 1 .
[0033] The liner 4 is cylindrical in structure, and the annular guide groove 10 is located at the bottom center of the liner 4 .
[0034] The leather lining 6 is a cylindrical structure with an open bottom end. The annular sealing groove 16 is located on the inner side of the top end of the leather lining 6 , and the guide sleeve 20 is located at the center of the annular sealing groove 16 .
[0035] The annular sealing groove 16 can be used to prevent oil leakage.
[0036] The leather cover 15 and the leather lining 6 are both made of engineering plastics.
[0037] The leather cover 15 and the leather lining 6 are made of engineering plastics, which have good processability and also have high requirements on strength, corrosion resistance and thermal conductivity.
[0038] The upper shell 1 and the lower shell 2 are both made of transparent engineering plastics.
[0039] The upper shell 1 and the lower shell 2 are made of transparent engineering plastics, which facilitates the modular assembly of the upper shell 1 and the lower shell 2. When the volume of the compensator needs to be changed, only the upper shell 1 and the lower shell 2 need to be changed, which is convenient for replacing spare parts, meets the needs of modular and product serialization production and manufacturing, and has strong versatility of parts and components.
[0040] The leather cover 15 , the diaphragm 5 , and the leather lining 6 are fixed by screws 29 .
[0041] The above detailed description is a specific description of a feasible embodiment of the utility model. The embodiment is not intended to limit the patent scope of the utility model. Any equivalent implementation or modification that does not deviate from the utility model should be included in the patent scope of this case.
Claims
1. A diaphragm pressure compensator for an underwater hydraulic system, characterized in that: It includes an upper shell, a lower shell, a displacement sensor, an inner liner, a diaphragm, and a leather lining. A top cover is arranged on the top side of the upper shell. The upper shell and the lower shell are connected by a connecting flange. A bottom cover is arranged on the bottom side of the lower shell. The inner liner is arranged in the upper shell. The inner liner has an annular guide groove. A return oil through hole for filling oil is arranged on a boss at the center of the annular guide groove. A plurality of return oil ports distributed in annular intervals are arranged on the top cover. The return oil port faces the annular guide groove. An oil suction port is arranged on the top cover. An oil suction pipe is arranged in the oil suction port. The oil suction pipe extends to the annular guide groove. The diaphragm and the leather lining are located at Between the upper shell and the lower shell, the top of the diaphragm is fixed to the connecting flange, the bottom of the diaphragm is pressed on the top of the leather lining through a leather cover, the leather lining has an annular sealing groove, the bottom cover has an annular mounting groove, a spring is arranged between the annular sealing groove and the annular mounting groove, a seawater through hole for introducing seawater is opened on the boss at the center of the annular mounting groove, a guide sleeve is arranged in the leather lining, the guide sleeve extends to the outside of the seawater through hole, the displacement sensor is arranged on the top cover, and the side rod of the displacement sensor passes through the oil return through hole, the leather cover and the diaphragm in sequence, and is inserted into the guide sleeve through the magnetic ring.
2. A diaphragm pressure compensator for an underwater hydraulic system according to claim 1, characterized in that: The inner liner is fixed to the top cover by screws.
3. The diaphragm pressure compensator for an underwater hydraulic system according to claim 1, characterized in that: The connecting flange is divided into an upper flange and a lower flange. The lower flange is provided with a fixing groove. The top end of the diaphragm is clamped in the fixing groove and is pressed by the upper flange.
4. A diaphragm pressure compensator for an underwater hydraulic system according to claim 3, characterized in that: The upper flange and the lower flange are fixed by bolts.
5. The diaphragm pressure compensator for an underwater hydraulic system according to claim 3, characterized in that: It also includes a plurality of screw rods which are distributed at intervals in a circumference, and each of the screw rods passes through the top cover, the upper flange, and the lower flange in sequence from top to bottom, and is finally fixed on the bottom cover.
6. A diaphragm pressure compensator for an underwater hydraulic system according to claim 5, characterized in that: The liner is in a cylindrical structure, and the annular guide groove is located at the bottom center of the liner.
7. A diaphragm pressure compensator for an underwater hydraulic system according to claim 6, characterized in that: The leather lining is a cylindrical structure with an open bottom end, the annular sealing groove is located on the inner side of the top end of the leather lining, and the guide sleeve is located at the center of the annular sealing groove.
8. The diaphragm pressure compensator for an underwater hydraulic system according to claim 7, characterized in that: The leather cover and the leather lining are both made of engineering plastics.
9. The diaphragm pressure compensator for an underwater hydraulic system according to claim 8, characterized in that: The upper shell and the lower shell are both made of transparent engineering plastics.
10. A diaphragm pressure compensator for an underwater hydraulic system according to claim 9, characterized in that: The leather cover, the diaphragm and the leather lining are fixed by screws.