A deep-sea pressure-balanced worm gear box

Abstract

This invention provides a deep-sea pressure-balanced worm gear box, relating to the field of worm gear box technology. The deep-sea pressure-balanced worm gear box includes a worm gear box body. A pressure balancing component, communicating with the interior of the worm gear box body, is located on one side of the body. The pressure balancing component includes a pressure tank, one end of which is connected to the worm gear box body. A movable component, slidably connected to the pressure tank, is located inside the pressure tank. Moving the movable component can change the pressure inside the worm gear box body. The movable component has multiple receiving holes, each containing a secondary adjustment section. The movable component and the secondary adjustment section cooperate to form a two-stage pressure compensation system. This invention, through its two-stage pressure compensation system, can precisely adjust the pressure inside the worm gear box. Furthermore, when pressure fluctuations occur outside the worm gear box, the secondary adjustment section can react quickly and rapidly compensate for the resulting pressure difference; thus, it achieves rapid response to fluctuations and improves the accuracy of the worm gear box's pressure balancing.

Description

Technical Field

[0001] This invention relates to the field of worm gearbox technology, and more particularly to a deep-sea pressure-balanced worm gearbox. Background Technology

[0002] As my country's exploration and development of the ocean, especially the deep sea, deepens, the invention and innovation of deep-sea exploration devices and deep-sea engineering machinery have become increasingly important in practice. The operating depth and performance parameters of these devices and machinery directly affect the scope, efficiency, and capability of deep-sea exploration and development.

[0003] The deep-sea worm gear box is a core transmission component of deep-sea operational equipment (such as ROV robotic arms and sampler transmission systems). Its function is to achieve power transmission and motion control in the extremely high-pressure, low-temperature, and dark deep-sea environment. At the same time, facing the high-pressure environment of the deep sea, the pressure difference between the inside and outside of the worm gear box can lead to a series of problems such as sealing failure, accelerated corrosion and wear of the worm gear, reduced transmission accuracy, and even jamming. Therefore, the pressure balance performance of the deep-sea worm gear box directly determines the reliability of deep-sea equipment in extreme environments.

[0004] Existing deep-sea worm gear boxes use oil-based media balancing to address the pressure balancing problem in deep seas. This mainly involves injecting high-viscosity oil into the worm gear box, using oil pressure transmission to buffer internal and external pressures, and then using piston movement to achieve pressure balance.

[0005] This refers to the balance of pressure inside and outside the worm gear box. When there is a difference between the pressure of seawater acting on the worm gear box shell and the pressure inside the shell, the piston will move accordingly to balance the pressure inside the worm gear box shell with the pressure outside the shell. This keeps the pressure acting on the shell stable within its tolerable limit, avoiding shell rupture caused by excessive local pressure and stress concentration.

[0006] Similar to the existing technologies described above, while pressure balance can be achieved inside and outside the worm gearbox, the piston response exhibits lag, making it difficult to achieve instantaneous and precise pressure matching. This results in a persistent micro-pressure difference. Furthermore, existing technologies cannot cope with the dynamic fluctuations of the deep sea; that is, the high-frequency pressure fluctuations caused by deep-sea turbulence and equipment movement cannot be absorbed, exacerbating intermittent sudden load changes in the gears. Simultaneously, during the transport of the worm gearbox to the deep sea, the rapid descent of the gearbox necessitates dealing with rapidly changing pressure differences. If the pressure difference inside and outside the worm gearbox cannot be quickly and effectively balanced, it may affect the normal operation of the gearbox.

[0007] Therefore, in order to solve the above problems, this invention proposes a deep-sea pressure balancing worm gear box, which aims to improve the worm gear box's ability to cope with pressure fluctuations while improving the accuracy of pressure balancing. Summary of the Invention

[0008] The purpose of this invention is to provide a deep-sea pressure-balanced worm gear box, which aims to solve the problem of insufficient accuracy when balancing internal and external pressures.

[0009] To achieve the above objectives, the present invention adopts the following technical solution: a deep-sea pressure-balanced worm gear box, comprising a worm gear box body, a pressure balancing component communicating with the interior of the worm gear box body on one side, the pressure balancing component comprising a pressure tank, one end of the pressure tank communicating with the worm gear box body, a movable component slidably connected thereto inside the pressure tank, moving the movable component can change the pressure inside the worm gear box body, the movable component having multiple receiving holes, a secondary adjustment part being provided in the receiving holes, the movable component cooperating with the secondary adjustment part to form a two-stage pressure compensation system;

[0010] The dual-stage pressure compensation system can precisely adjust the pressure inside the worm gear box.

[0011] Preferably, the pressure tank has a connection port at one end near the worm gear box body, the connection port being connected to the interior of the worm gear box body, and the other end of the pressure tank has an inlet and outlet.

[0012] Preferably, the secondary adjustment unit includes a small piston, which is slidably connected to the receiving hole. Moving the small piston can finely adjust the pressure inside the worm gear box body.

[0013] Preferably, the pressure balancing assembly further includes a flow rate changing unit, which is capable of changing the speed at which seawater enters and exits the pressure tank.

[0014] Preferably, the pressure tank has a receiving cavity at one end near the inlet and outlet, and the receiving cavity has a main through hole and a secondary through hole on the side near the connection port.

[0015] Preferably, the flow rate change section includes a rotating component, which is rotatably connected to the receiving cavity. An elastic telescopic component is provided on the side of the rotating component away from the connection port. The rotating component has a main flow port corresponding to the main flow port and a secondary flow port corresponding to the secondary flow port. Rotating the rotating component can change the relative position of the secondary flow port and the secondary flow port.

[0016] Preferably, the flow rate change section further includes a rotating shaft, which is coaxially arranged with the rotating component. The rotating shaft is provided with multiple rotating blades, and the seawater passing through the inlet and outlet can drive the rotating blades to rotate the rotating shaft and the rotating component.

[0017] Preferably, the pressure balancing assembly further includes a protective section, which works in conjunction with the flow rate change section to protect the secondary regulating section when the pressure difference across the moving part is too large.

[0018] Preferably, the protective part includes a protective plate rotatably connected to the moving part, and a telescopic rod is provided on the side of the protective plate away from the moving part. One end of the telescopic rod is connected to a rotating shaft. Rotating the rotating shaft can drive the protective plate to rotate through the telescopic rod, thereby changing the protection state of the secondary adjustment part.

[0019] Preferably, a two-stage reduction assembly is provided on one side of the worm gear box body, an opening indicator assembly is provided at one end of the two-stage reduction assembly, a filter screen is provided at the end of the pressure balancing assembly away from the worm gear box body, a protective cover is provided around the pressure balancing assembly, and the protective cover is connected to the worm gear box body.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0021] 1. This invention forms a two-stage pressure compensation system through the cooperation of a moving component and a secondary adjustment unit. The moving component performs coarse adjustment of the pressure difference, while the secondary adjustment unit performs fine adjustment of the pressure difference. Furthermore, when pressure fluctuations occur outside the worm gear box, the secondary adjustment unit can react quickly and compensate for the pressure difference rapidly, thereby achieving the ability to quickly respond to fluctuations and improving the precise pressure balance of the worm gear box.

[0022] 2. This invention, through the setting of the flow rate change section, determines the pressure difference range inside and outside the worm gear box based on the speed of seawater entering and exiting the pressure tank, and causes the moving part to react accordingly. When the height of the worm gear box in the seawater changes drastically, the pressure difference inside and outside the worm gear box increases, the speed of seawater entering and exiting the pressure tank increases, the rotating part in the flow rate change section rotates, increasing the seawater flow area, further increasing the speed of seawater entering and exiting the pressure tank, causing the moving part to move quickly, improving the speed of balancing the internal and external pressure of the worm gear box, preventing damage to the worm gear box due to excessive pressure difference, and improving the response speed of pressure balancing of the worm gear box.

[0023] 3. This invention links the protective section with the flow rate change section. When the pressure inside and outside the worm gear box is high, the rotating shaft drives the rotating component to rotate, which in turn drives the protective plate to rotate. That is, when the moving component moves rapidly, the protective plate protects the secondary adjustment section to prevent damage due to excessive pressure difference. When the pressure inside and outside the worm gear box is low, the protective plate releases its protection of the secondary adjustment section, allowing the secondary adjustment section to finely adjust the pressure difference, thereby improving the service life of the worm gear box and ensuring its accuracy. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of the present invention.

[0025] Figure 2 This is a cross-sectional view of the overall structure of the present invention.

[0026] Figure 3 This is a schematic diagram of the worm gear structure of the present invention.

[0027] Figure 4 This is a schematic diagram of the pressure balancing component in this invention.

[0028] Figure 5 This is a schematic diagram of the flow rate change section in this invention.

[0029] Figure 6 This is a schematic diagram of the secondary adjustment section in this invention.

[0030] Figure 7 This is a schematic diagram of the pressure balancing component structure in Embodiment 3 of the present invention.

[0031] Figure 8 This is a schematic diagram of the protective section and the flow rate change section of the present invention.

[0032] Figure label:

[0033] 1. Worm gearbox body; 2. Pressure balancing assembly; 3. Filter screen cover; 4. Protective cover; 5. Secondary reduction assembly; 6. Opening indicator assembly; 110. Box body; 120. Worm gear; 130. Worm; 140. Adjusting bolt; 210. Pressure tank; 220. Moving part; 230. Flow rate change part; 240. Protective part; 211. Inlet and outlet; 212. Connection port; 213. Main through hole; 214. Secondary through hole; 215. Receiving cavity; 216. First ear Plate; 221, Receiving hole; 222, Secondary adjustment section; 231, Rotating component; 232, Rotating shaft; 233, Rotating plate; 234, Elastic telescopic component; 235, Mounting component; 236, Second ear plate; 241, Protective plate; 242, Telescopic rod; 2221, Small piston; 2222, Elastic component; 2223, Connecting frame; 2224, Limiting ring; 2311, Main flow port; 2312, Secondary flow port; 2411, Large through hole; 2412, Small through hole. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] Example 1

[0036] To improve the accuracy of the worm gearbox's balancing pressure, such as Figures 1 to 6 As shown, the present invention proposes a deep-sea pressure-balanced worm gear box, including a worm gear box body 1, a pressure-balanced component 2 communicating with the interior of the worm gear box body 1 on one side, a secondary reduction component 5 on the other side of the worm gear box body 1, and an opening indicator component 6 at one end of the secondary reduction component 5.

[0037] The worm gearbox body 1 includes a housing 110, in which a worm gear 120 and a worm 130 are provided. The worm gear 120 and the worm 130 are rotatably mounted on the housing 110 and their outer peripheries are meshed for transmission. One end of the worm 130 near the secondary reduction assembly 5 extends to the outside of the housing 110 and is connected to the secondary reduction assembly 5 for transmission.

[0038] The housing 110 is also equipped with two adjusting bolts 140. The adjusting bolts 140 are rotatably connected to the housing 110. The adjusting bolts 140 are used to limit the rotation angle of the worm gear 120. When the worm gear 120 rotates to a set limit position, it abuts against one adjusting bolt 140. When the worm gear 120 reaches another limit position in the opposite direction, it abuts against the other adjusting bolt 140.

[0039] The secondary reduction assembly 5 includes a set of bevel gears inside it. One bevel gear is connected to the worm gear 130, and the other bevel gear is connected to the drive shaft and the opening indicator assembly 6. The number of teeth in the bevel gear set is different. The secondary reduction assembly 5 reduces speed according to the tooth ratio of the internal bevel gear set. The bevel gear set also changes the transmission direction while reducing speed.

[0040] The opening indicator component 6 includes a multi-gear set inside it and an indicator needle outside the opening indicator component 6. The indicator needle is used to display the rotation angle of the worm gear 120 in the worm gear box body 1. The multi-gear set reduces the rotation transmitted from the drive shaft to drive the indicator needle to rotate, while ensuring the accuracy of the indicator needle rotation.

[0041] In this embodiment, the pressure balancing component 2 includes a pressure tank 210. One end of the pressure tank 210 is connected to the worm gear box body 1, and the other end of the pressure tank 210 is connected to the outside seawater. A movable component 220 is provided inside the pressure tank 210. The movable component 220 is slidably connected to the pressure tank 210. Moving the movable component 220 can change the pressure inside the worm gear box body 1.

[0042] It should be noted that when the pressure on both sides of the moving part 220 is unbalanced, the moving part 220 will move towards the direction of lower pressure to maintain the pressure balance on both sides of the moving part 220. This is because one end of the pressure tank 210 is connected to seawater and the other end is connected to the worm gear box body 1. When the pressure on both sides of the moving part 220 is balanced, the worm gear box as a whole is in pressure balance with the seawater.

[0043] The lower space of the moving part 220 of the pressure balance component 2, the worm gear box body 1, the secondary reduction component 5 and the opening indicator component 6 are connected in sequence to form a connected cavity to ensure the balance of internal pressure. The cavity is filled with pressure-resistant synthetic oil. The pressure-resistant synthetic oil adopts a special formula. The pressure-resistant synthetic oil can be perfluoropolyether oil, which can withstand pressures of up to 200MPa and is suitable for deep-sea equipment.

[0044] At the same time, when the pressure balancing component 2 changes its internal pressure, the pressure inside the worm gear box body 1, the secondary reduction component 5, and the opening indicator component 6 changes synchronously to prevent pressure difference.

[0045] In this embodiment, a filter screen 3 is provided at the end of the pressure balancing component 2 away from the worm gear box body 1, and a protective cover 4 is provided around the pressure balancing component 2. The protective cover 4 is connected to the worm gear box body 1.

[0046] The filter screen cover 3 is located at the end of the pressure tank 210 away from the worm gear box body 1. The filter screen cover 3 can prevent impurities in the seawater from entering the pressure tank 210, thereby protecting the internal structure of the pressure tank 210. The protective cover 4 is located around the pressure balancing assembly 2 to prevent external impacts from damaging the pressure balancing assembly 2. The protective cover 4 is fixed on the worm gear box body 1 and does not directly contact the pressure balancing assembly 2, thus better protecting the pressure balancing assembly 2.

[0047] In this embodiment, the movable part 220 is provided with a plurality of receiving holes 221, and a secondary adjustment part 222 is provided in the receiving holes 221. The movable part 220 and the secondary adjustment part 222 cooperate to form a two-stage pressure compensation system.

[0048] It should be noted that the wall of the receiving hole 221 is coated with titanium alloy, which can reduce stress risk and improve fatigue strength; the secondary adjustment unit 222 can work with the moving part 220 to make fine-tuning of pressure, and at the same time, the secondary adjustment unit 222 can autonomously adjust to small pressure fluctuations.

[0049] The two-stage pressure compensation system can precisely adjust the pressure inside the worm gear box. When the pressure difference between the inside and outside of the worm gear box is large, the moving part 220 makes a coarse adjustment to achieve rapid pressure balance. The secondary adjustment unit 222 works with the moving part 220 to perform secondary pressure adjustment, making the pressure balance more precise. When the pressure difference between the inside and outside of the worm gear box is small, the secondary adjustment unit 222 directly balances the pressure difference quickly. The secondary adjustment unit 222 is smaller than the moving part 220, so it responds faster and adjusts more accurately. The two-stage pressure compensation system formed by the secondary adjustment unit 222 and the moving part 220 can quickly and accurately balance the pressure in various situations.

[0050] In this embodiment, the pressure tank 210 has a connection port 212 at one end near the worm gear box body 1, which communicates with the interior of the worm gear box body 1. The other end of the pressure tank 210 has an inlet / outlet 211, and a filter screen 3 is installed on the inlet / outlet 211 of the pressure tank 210, which communicates with external seawater. The connection port 212 and the inlet / outlet 211 are connected by different liquids. The moving part 220 moves according to the pressure difference on both sides to balance the pressure between the two liquids, thereby balancing the pressure of the worm gear box.

[0051] The secondary regulating unit 222 can use a small piston 2221 for pressure fine-tuning. The small piston 2221 and the moving part 220 form a nested two-stage piston. The moving part 220 bears a large range of pressure fluctuations and absorbs the main pressure changes through displacement for coarse adjustment. The small piston 2221 is embedded in the moving part 220 and compensates for the residual micro pressure difference of the moving part 220 through micro-displacement for fine adjustment. At the same time, the response rate of the small piston 2221 can reach 8MPa / s, which significantly shortens the lag time. The theoretical static pressure difference control accuracy of the small piston 2221 can reach ±0.03MPa.

[0052] The secondary adjustment unit 222 includes a small piston 2221, which is slidably connected to the receiving hole 221. An elastic element 2222 is provided on the side of the small piston 2221 near the connection port 212 and is connected to one end of the elastic element 2222. A connecting bracket 2223 is provided on the other end of the elastic element 2222 and is connected to the receiving hole 221. A limiting ring 2224 is provided on each side of the small piston 2221. The limiting ring 2224 can ensure that the elastic element 2222 is within the normal operating range.

[0053] It should be noted that the elastic element 2222 ensures that the small piston 2221 is in the middle position after the pressure is balanced, enabling it to respond quickly to various pressure differences. When the pressure is balanced, if the small piston 2221 is not in the middle position, the elastic element 2222 will move the small piston 2221 towards the middle, forming a pressure difference. This pressure difference will drive the moving element 220 or other small pistons 2221 to move, eliminating these pressure differences. The setting of the limit ring 2224 can prevent the small piston 2221 from moving excessively, avoid the elastic element 2222 from exceeding its operating range, and ensure service life and accuracy.

[0054] In this embodiment, the secondary adjustment unit 222 can also use a diaphragm for pressure fine-tuning. The diaphragm and the moving part 220 form a two-stage pressure compensation system of piston coarse adjustment + diaphragm fine adjustment. The moving part 220 undertakes pressure compensation over a wide range. The diaphragm accurately offsets the residual micro-pressure difference due to piston response lag through elastic deformation, which can improve the static pressure difference control accuracy to ±0.05MPa. The flexible characteristics of the diaphragm compensate for the deformation lag of the rigid piston material, while the piston skeleton provides high-pressure support for the diaphragm to prevent the diaphragm from rupturing due to overpressure. The diaphragm structure can use a biomimetic structure, such as referencing the osmotic pressure regulation method of deep-sea amphipods, and the diaphragm is set as a multi-layer silicone-metal laminated diaphragm to improve deformation uniformity.

[0055] In this embodiment, a two-stage pressure compensation system is formed through the cooperation of the moving part 220 and the secondary adjustment part 222. The moving part 220 performs coarse adjustment of the pressure difference, while the secondary adjustment part 222 performs fine adjustment of the pressure difference. Furthermore, when pressure fluctuations occur outside the worm gear box, the secondary adjustment part 222 responds quickly and can rapidly compensate for the pressure difference. When the pressure difference fluctuation is too large, the moving part 220 can intervene in time to avoid damage to the secondary adjustment part 222. The above settings improve the worm gear box's ability to cope with pressure fluctuations, reduce the damage of pressure difference to the worm gear box, and improve the accuracy of the worm gear box's pressure balance.

[0056] Example 2

[0057] In actual use, during the process of lowering the worm gear box to the deep sea, the worm gear box has a large range of elevation, resulting in a large pressure difference in the worm gear box. This causes the worm gear box to be unable to quickly balance the pressure during the ascent or descent.

[0058] To solve the above technical problems, such as Figures 1 to 8 As shown, in another embodiment of the present invention, the pressure balancing component 2 further includes a flow rate changing unit 230, which is capable of changing the speed at which seawater enters and exits the pressure tank 210.

[0059] The pressure tank 210 has a receiving cavity 215 at one end near the inlet / outlet 211. The receiving cavity 215 has a main through hole 213 and a secondary through hole 214 on the side near the connection port 212. The secondary through holes 214 are arranged in a circumferential array around the main through hole 213.

[0060] The flow rate change unit 230 includes a rotating member 231, which is rotatably connected to the receiving cavity 215. The rotating member 231 has a main flow port 2311 and a secondary flow port 2312. The main flow hole 213 corresponds to the main flow port 2311, and the secondary flow hole 214 corresponds to the secondary flow port 2312. Rotating the rotating member 231 can change the relative position of the secondary flow hole 214 and the secondary flow port 2312, thereby changing the amount of liquid passing through the secondary flow hole 214 and thus changing the speed at which seawater enters and exits the pressure tank 210.

[0061] It should be noted that when the rotating component 231 is in the initial position, the secondary passage hole 214 and the secondary flow port 2312 are in a staggered position, and the secondary passage hole 214 is closed. At this time, seawater can only pass through the main passage hole 213. When the rotating component 231 rotates to a new position, the secondary passage hole 214 and the secondary flow port 2312 coincide, and seawater can pass through both the secondary passage hole 214 and the main passage hole 213 at the same time, thereby changing the speed at which seawater enters and exits the pressure tank 210.

[0062] In this embodiment, the flow rate change unit 230 further includes a rotating shaft 232, which is coaxially arranged with the rotating component 231. The rotating shaft 232 is rotatably connected to the pressure tank 210 through a mounting component 235. The mounting component 235 is provided between the rotating shaft 232 and the pressure tank 210. The mounting component 235 is rotatably connected to the rotating shaft 232 and is fixedly connected to the pressure tank 210. The rotating shaft 232 is fixedly connected to the rotating component 231, and the rotating component 231 rotates synchronously with the rotating shaft 232.

[0063] The rotating shaft 232 is provided with multiple rotating blades 233. The rotating blades 233 are similar to fan blades. The rotating blades 233 are located close to the inlet and outlet 211. The seawater passing through the inlet and outlet 211 can drive the rotating blades 233 to rotate along the rotating shaft 232, thereby driving the rotating component 231 to rotate through the rotating shaft 232.

[0064] The rotating plate 233 is fixedly connected to the rotating shaft 232. The rotating plate 233 is located close to the inlet and outlet 211 and can react at any time according to the flow of the inlet and outlet 211.

[0065] In this embodiment, the rotating member 231 is provided with an elastic telescopic member 234 on the side away from the connection port 212, and a first ear plate 216 is provided on the inner wall of the receiving cavity 215. The elastic telescopic member 234 is connected to the receiving cavity 215 through the first ear plate 216. The rotating member 231 is provided with a second ear plate 236 on the side away from the connection port 212. The telescopic rod of the elastic telescopic member 234 passes through the first ear plate 216 and abuts against the second ear plate 236 at the end of the telescopic rod of the elastic telescopic member 234. Two elastic telescopic members 234 are symmetrically provided, and two first ear plates 216 connected to the elastic telescopic members 234 are also provided accordingly. The second ear plate 236 is located between the two elastic telescopic members 234. The telescopic rods of the two elastic telescopic members 234 abut against the two sides of the second ear plate 236. The elastic telescopic members 234 restrict the position of the rotating member 231 through the second ear plate 236. The elastic telescopic members 234 enable the rotating member 231 to rotate before the auxiliary through hole 214 and the auxiliary flow port 2312 are in an interleaved position.

[0066] Both elastic telescopic members 234 are fixed inside the receiving cavity 215 by the first ear plate 216. The telescopic rods of the two elastic telescopic members 234 respectively abut against the two sides of the second ear plate 236. The two elastic telescopic members 234 can prevent the rotating member 231 from rotating when subjected to a small force by elastic potential energy, so that the secondary through hole 214 and the secondary flow port 2312 are kept in an interleaved position. When the rotating member 231 is subjected to a large force, the rotating member 231 is driven to rotate, the second ear plate 236 separates from the elastic telescopic member 234 on one side and squeezes the elastic telescopic member 234 on the other side until the second ear plate 236 abuts against the first ear plate 216 on one side. At this time, the first ear plate 216 restricts the rotation of the rotating member 231 through the second ear plate 236. After the second ear plate 236 contacts the first ear plate 216, the rotating member 231 stops rotating, ensuring that the rotating member 231 maintains the rotated state when subjected to continuous force, and maintaining the communication between the secondary through hole 214 and the secondary flow port 2312.

[0067] It should be noted that when the pressure fluctuation is small, the elastic expansion member 234 can prevent the rotating member 231 from rotating by applying force to both sides of the second ear plate 236, and keep the rotating member 231 in the initial position, that is, the position where the secondary through hole 214 and the secondary flow port 2312 are intersected. Because the rotating plate 233 is fixedly connected to the rotating shaft 232, and the rotating member 231 is fixedly connected to the rotating shaft 232, when the rotating member 231 cannot rotate, the rotating plate 233 is also in a state where it cannot rotate. At this time, the seawater entering and leaving the pressure tank 210 has a small speed, making it easier to perform fine pressure adjustment.

[0068] When the pressure fluctuates greatly, the seawater flow velocity through inlet and outlet 211 is high, which increases the force exerted on the rotating plate 233. This causes the rotating plate 233 to exert a greater force on the rotating component 231 through the rotating shaft 232. This allows the second ear plate 236 on the rotating component 231 to resist the elastic force of the elastic telescopic component 234 on one side and compress the elastic telescopic component 234, thereby causing the rotating component 231 to rotate. When the second ear plate 236 contacts the first ear plate 216, the rotating component 231 stops rotating to prevent the rotating plate 233 from rotating excessively. At this time, the secondary passage hole 214 opens, further increasing the velocity of the seawater entering and exiting the pressure tank 210, keeping the rotating plate 233 in a state where the secondary passage hole 214 is connected to the secondary flow port 2312. At the same time, the increased velocity of the seawater allows the moving component 220 to move faster, achieving the purpose of quickly balancing the pressure.

[0069] This invention, through the setting of the flow rate change unit 230, determines the pressure difference range inside and outside the worm gear box based on the speed of seawater entering and exiting the pressure tank 210, and causes the moving part 220 to react accordingly. When the height of the worm gear box in the seawater changes drastically, the pressure difference inside and outside the worm gear box increases, the speed of seawater entering and exiting the pressure tank 210 increases, the rotating part 231 in the flow rate change unit 230 rotates, opens the auxiliary through hole 214, increases the area of ​​seawater flow, further increases the speed of seawater entering and exiting the pressure tank 210, causes the moving part 220 to move quickly, improves the speed of balancing the internal and external pressure of the worm gear box, prevents damage to the turbine box due to excessive pressure difference, and improves the response speed of pressure balancing of the worm gear box.

[0070] Example 3

[0071] In actual use, when the pressure difference between the two sides of the moving part 220 is too large during the lifting and lowering of the worm gear box, the secondary adjustment part 222 is easily damaged.

[0072] To solve the above technical problems, such as Figures 1 to 8 As shown, in another embodiment of the present invention, the pressure balancing assembly 2 further includes a protective part 240, which can protect the secondary adjustment part 222 when the pressure difference on both sides of the moving part 220 is too large.

[0073] The protective part 240 includes a protective plate 241, which is located on the side of the movable part 220 away from the connection port 212. The protective plate 241 is rotatably connected to the movable part 220. The protective plate 241 is provided with a large through hole 2411 corresponding to the receiving hole 221, and the protective plate 241 is also provided with small through holes 2412 that are staggered with the large through hole 2411.

[0074] It should be noted that rotating the protective plate 241 can change the position of the receiving hole 221 on the protective plate 241; when the protective plate 241 is in the protective state, the receiving hole 221 corresponds to the small through hole 2412, and when the protective plate 241 is not in the protective state, the receiving hole 221 corresponds to the large through hole 2411.

[0075] When the protective plate 241 is in the protective state, a separate chamber is formed between the protective plate 241 and the secondary adjustment part 222. This chamber is prone to pressure difference with other positions, which can easily damage the secondary adjustment part 222. The small through hole 2412 can slowly balance the pressure difference between this chamber and the outside.

[0076] In this embodiment, a telescopic rod 242 is provided on the side of the protective plate 241 away from the moving part 220. One end of the telescopic rod 242 is connected to the protective plate 241, and the other end is connected to the rotating shaft 232. Rotating the rotating shaft 232 can drive the protective plate 241 to rotate via the telescopic rod 242. A through groove is provided at the connection position between the telescopic rod 242 and the rotating shaft 232 to allow seawater to enter and exit the telescopic rod 242, preventing damage due to pressure imbalance inside and outside the telescopic rod 242.

[0077] Limiting components are provided between the various telescopic parts of the telescopic rod 242. While ensuring that it can telescopically extend and retract, it can also ensure that the protective plate 241 rotates with the rotating component 231. When the rotating component 231 is in the initial state, that is, when the secondary through hole 214 is closed, the protective plate 241 is in an unprotected state, that is, the receiving hole 221 corresponds to the large through hole 2411, and the secondary adjustment part 222 is fully involved in pressure regulation.

[0078] When the internal and external pressure difference of the worm gear box is not large, the rotating plate 233 does not rotate, the rotating component 231 is in the initial state, the protective plate 241 is in an unprotected state, and the secondary adjustment unit 222 fully participates in pressure regulation to achieve precise pressure regulation of the worm gear box.

[0079] When the pressure difference between the inside and outside of the worm gear box is large, such as during the lifting and lowering of the worm gear box, the seawater flow velocity through the inlet and outlet 211 is high. The rotating plate 233 rotates, driving the rotating part 231 and the protective plate 241 to rotate. After the rotating part 231 rotates, it opens the auxiliary through hole 214. After the protective plate 241 rotates, it enters the protective state, that is, the receiving hole 221 corresponds to the small through hole 2412. At this time, the seawater flow velocity is high, and the moving part 220 balances the pressure. After the pressure decreases, the rotating part 231 is driven to rotate by the elastic force of the elastic telescopic part 234. The rotating part 231 returns to the initial state, and the protective plate 241 returns to the unprotected state. The secondary adjustment unit 222 performs fine pressure balancing again.

[0080] During the above process, when the moving part 220 moves rapidly, if the seawater pressure is greater than the oil pressure, the moving part 220 moves closer to the connection port 212, and the pressure inside the chamber formed by the protective plate 241 and the secondary adjustment part 222 is lower than the external pressure, so the seawater gradually enters the chamber through the small through hole 2412; if the seawater pressure is lower than the oil pressure, the moving part 220 moves closer to the inlet and outlet 211, and the pressure inside the chamber formed by the protective plate 241 and the secondary adjustment part 222 is greater than the external pressure, so the seawater gradually exits the chamber through the small through hole 2412; the pressure is balanced to ensure that the secondary adjustment part 222 is not damaged due to excessive impact or excessive pressure difference.

[0081] In this embodiment, the protective part 240 is linked with the flow rate change part 230. When the pressure inside and outside the worm gear box is high, the rotating shaft 232 drives the rotating part 231 to rotate, and at the same time drives the protective plate 241 to rotate. That is, when the moving part 220 moves quickly, the protective plate 241 protects the secondary adjustment part 222 to prevent damage to the secondary adjustment part 222 due to excessive pressure difference. When the pressure inside and outside the worm gear box is low, the protective plate 241 releases the protection of the secondary adjustment part 222, so that the secondary adjustment part 222 can make fine adjustment of the pressure difference, thereby improving the service life of the worm gear box and ensuring the accuracy of the worm gear box.

[0082] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A deep sea pressure balanced worm gear box comprising a worm gear box body (1), one side of the worm gear box body (1) is provided with a pressure balancing assembly (2) in communication with the inside thereof, characterized in that, The pressure balance assembly (2) comprises a pressure tank (210) in communication with the worm gear box body (1) at one end, a moving part (220) slidably connected in the pressure tank (210), moving the moving part (220) can change the pressure in the worm gear box body (1), a plurality of accommodating holes (221) are formed in the moving part (220), a secondary adjusting part (222) is arranged in the accommodating hole (221), the moving part (220) cooperates with the secondary adjusting part (222) to form a two-stage pressure compensation system, and the two-stage pressure compensation system can accurately adjust the pressure in the worm gear box. The secondary adjusting part (222) comprises a small piston (2221) slidably connected with the accommodating hole (221), and moving the small piston (2221) can finely adjust the pressure in the worm gear box body (1). The pressure tank (210) is provided with a connecting port (212) at one end close to the worm gear box body (1) and an inlet and outlet (211) at the other end, a containing cavity (215) is arranged at one end of the pressure tank (210) close to the inlet and outlet (211), and a main through hole (213) and a secondary through hole (214) are arranged on one side of the containing cavity (215) close to the connecting port (212). The pressure balance assembly (2) further comprises a flow change part (230) capable of changing the speed of seawater entering and leaving the pressure tank (210), the flow change part (230) comprises a rotating part (231) and a rotating shaft (232) coaxially arranged with the rotating part (231), the rotating part (231) is rotatably connected with the containing cavity (215), one side of the rotating part (231) away from the connecting port (212) is provided with an elastic telescopic part (234), the rotating part (231) is provided with a main flow passage (2311) corresponding to the main through hole (213) and a secondary flow passage (2312) corresponding to the secondary through hole (214), and rotating the rotating part (231) can change the relative position of the secondary through hole (214) and the secondary flow passage (2312). The pressure balance assembly (2) further comprises a protection part (240) cooperating with the flow change part (230) and capable of protecting the secondary adjusting part (222) when the pressure difference on both sides of the moving part (220) is too large. The protection part (240) comprises a protection plate (241) rotatably connected with the moving part (220), one side of the protection plate (241) away from the moving part (220) is provided with a telescopic rod (242), one end of the telescopic rod (242) is connected with the rotating shaft (232), rotating the rotating shaft (232) can drive the protection plate (241) to rotate through the telescopic rod (242), so that the protection state of the secondary adjusting part (222) is changed.

2. The worm gear box of claim 1, wherein, The connecting port (212) of the pressure tank (210) is in communication with the inside of the worm gear box body (1).

3. The worm gear box of claim 1, wherein, A plurality of rotating pieces (233) are arranged on the rotating shaft (232), and seawater passing through the inlet and outlet (211) can push the rotating pieces (233) to rotate the rotating shaft (232) and the rotating piece (231).

4. The worm gear box of claim 1, wherein, The worm gear box body (1) is provided with a two-stage speed reduction assembly (5) on one side, the two-stage speed reduction assembly (5) is provided with an opening degree indicating assembly (6) on one end, the pressure balance assembly (2) is provided with a filter screen cover (3) away from the worm gear box body (1) on one end, the pressure balance assembly (2) is provided with a protective cover (4) on the periphery, and the protective cover (4) is connected with the worm gear box body (1).

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