Underwater propulsion motor sealing structure and sealing method thereof

Abstract

The present invention relates to the technical field of motor sealing, and discloses an underwater propulsion motor sealing structure and a sealing method thereof, comprising a shell mechanism, wherein the shell mechanism also comprises an equipment shell, the bottom of the equipment shell is fixedly connected with a fixing plate, utilizing the characteristic that the water pressure in a deep water area is higher than that in a shallow water area, a pressurized air bag and an expansion bag are arranged inside the equipment, before using the equipment, the equipment is fixed at a desired position by a mounting rod and a mounting block, and the power supply of the propulsion motor is turned on, as the water level of the equipment deepens, the water pressure to which the equipment is subjected will continue to increase, wherein the external pressure to which the pressurized air bag in deep water is subjected is greater than that in surface waters, when the gas inside the expansion bag and the pressurized air bag cannot be balanced with the external water pressure, the pressurized air bag and the expansion bag will expand, and the expanded expansion bag will fill the gap between the equipment shell and the fixing plate.

Description

Technical Field

[0001] The present invention relates to the technical field of motor sealing equipment, and in particular to an underwater propulsion motor sealing structure and a sealing method thereof. Background Art

[0002] Underwater propulsion motors are devices used to drive underwater equipment such as submersibles, unmanned underwater vehicles (AUVs), remotely operated vehicles (ROVs), etc. They must operate reliably in high pressure, high humidity, and corrosive environments.

[0003] Among them, the temperature difference between shallow water and deep water is large. When the sealing structure enters the deep water area, cold shrinkage will occur between the various components inside the equipment. In addition, under high water pressure environment, external water will enter the equipment through the shrinkage gap, affecting the sealing effect of the equipment and eventually causing damage to the sealing structure. In response to the above problems, the following solutions are proposed. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides an underwater propulsion motor sealing structure, including a housing mechanism, the housing mechanism also includes a device housing, a fixing plate is fixedly connected to the bottom of the device housing, a pressurized airbag is fixedly connected to the inner wall of the device housing, and an expansion bag is connected through the side wall of the pressurized airbag;

[0005] The control mechanism includes a fixed rod fixedly connected to the side wall of the device housing, a pull belt 1 is fixedly connected to the side wall of the fixed rod, a pressing cover is fixedly connected to the end of the pull belt 1 away from the fixed rod, and a pull belt 2 is fixedly connected to the end of the pressing cover away from the pull belt 1;

[0006] The cleaning mechanism includes a hydraulic box 1 fixedly connected to the bottom of the pressurized airbag, a piston plate 1 is slidably connected to the inner wall of the hydraulic box 1, a hydraulic box 2 is fixedly connected to the side wall of the hydraulic box 1, the top of the hydraulic box 1 is fixedly connected to the bottom of the pressurized airbag, a transmission hole is provided on the connecting surface between the hydraulic box 2 and the hydraulic box 1, a mounting rod is fixedly connected to the bottom of the pressurized airbag, and a mounting block is fixedly connected to the side wall of the mounting rod.

[0007] Preferably, the shell mechanism also includes a rubber shell that is connected to the side wall of the device shell, the top of the pressurized airbag is fixedly connected to a propulsion motor, and the output shaft of the propulsion motor is fixedly connected to a driving column. Taking advantage of the fact that the water pressure in deep water areas is higher than that in shallow water areas, a pressurized airbag and an expansion bag are arranged inside the device. Before using the device, the device is fixed at a desired position by means of mounting rods and mounting blocks, and the power supply of the propulsion motor is turned on. As the water level of the device deepens, the water pressure to which the device is subjected will continue to increase, and the external pressure to which the pressurized airbag in deep water is subjected is greater than that in surface waters. When the gas inside the expansion bag and the pressurized airbag cannot balance the external water pressure, the pressurized airbag and the expansion bag will expand, and the expanded expansion bag will fill the gap between the device shell and the fixed plate, presenting a Figure 4 The state shown, through the application of the above components, ensures that when the equipment reaches deep waters, the expansion bag is pressurized and expanded, plugging the gaps of various components due to cold contraction, thereby improving the sealing of the equipment.

[0008] Preferably, the housing mechanism further comprises a mounting plate fixedly connected to one end of the rubber shell away from the device housing, a sealing ring is fixedly connected to the inner wall of the through hole of the mounting plate, and the inner wall of the sealing ring is rotatably connected to the outer wall of the driving column.

[0009] Preferably, the control mechanism also includes a fixing frame fixedly connected to the top of the device housing, a collecting column is rotatably connected to the inner wall of the fixing frame, the end of the pulling belt 2 away from the pressing cover is fixedly connected to the outer wall of the collecting column, and a gear 1 is fixedly connected to both sides of the collecting column. In order to solve the problem that the expansion bag and the pressurized air bag will rupture when they swell to a certain extent, a pressing cover is provided inside the device. When the external water pressure is too deep, the expansion bag will push the pressing cover to extend outward, and the pressing cover will drive the fixing rod and the pulling belt 2 to move synchronously. The collecting column provided inside the device is used to limit the extended length of the pulling belt 2. When the expansion bag reaches the maximum expansion point due to material limitations, the pulling belt 2 is also fully expanded outward. At this time, the collecting column will pull the pulling belt 2 so that the pulling belt 2 will no longer extend, and the maximum expansion point of the expansion bag is limited by the pressing cover to avoid excessive pressure difference between the inside and outside of the expansion bag, which exceeds the limit that the material can withstand and causes the balloon to explode.

[0010] Preferably, the control mechanism also includes gear 2 rotatably connected to the inner wall of the fixed frame, a collecting wheel is fixedly connected to the side wall of gear 2, a tightening line is fixedly connected to the inner wall of the collecting wheel, a sliding hook is slidably connected to the inner wall of the fixed plate, and the end of the tightening line away from the collecting wheel is fixedly connected to the top of the sliding hook. Utilizing the characteristic of the above-mentioned pulling belt 2 driving the collecting column to rotate, a tightening line is arranged inside the device. When the collecting column rotates due to the pulling belt 2, the collecting column drives the gear 2 and the collecting wheel to rotate synchronously through gear 1, and the rotation of the collecting wheel will pull the tightening line to shrink, forcing the sliding hook to move upward along the inner wall of the pressurized airbag, and the pulling force generated by the sliding hook will strengthen the connection between the device casing and the fixed plate, reduce the efficiency of the component shrinking in a low temperature environment, and avoid the expansion of the gap between the device casing and the fixed plate, causing external water to enter the interior of the device and affect the sealing effect of the device.

[0011] Preferably, the cleaning mechanism further comprises a piston plate 2 slidably connected to the inner wall of the hydraulic box 2, the bottom of the piston plate 2 is fixedly connected to a supporting cylinder, and the end of the supporting cylinder away from the piston plate 2 is fixedly connected to an L-shaped plate.

[0012] Preferably, the cleaning mechanism also includes a collecting belt fixedly connected to the top of the L-shaped plate, the bottom of the collecting belt is slidably connected to the outer wall of the rubber shell, the outer wall of the sliding hook is fixedly connected to the bottom of the piston plate 1, and a spring for resetting is fixedly connected to the inner wall of the collecting column. By utilizing the pulling force generated by the above-mentioned sliding hook, a cleaning mechanism is arranged inside the equipment. When the sliding hook is pulled upward, the sliding hook will push the piston plate 1 upward, forcing the liquid inside the piston plate 1 to enter the hydraulic box 2 through the transmission hole. The liquid inside the hydraulic box 2 increases, and the supporting column and the L-shaped The plate moves outward, and as the L-shaped plate moves downward, the L-shaped plate drives the collecting belt to compress the rubber shell, so that the pressurized air bag at the bottom of the rubber shell is tightly attached to the outer wall of the driving column, thereby improving the sealing of the connection position between the driving column and the mounting plate. Through the application of the above components, the equipment can autonomously adjust the clamping force between the driving column and the pressurized air bag according to the changes in the external water pressure environment, thereby ensuring that the clamping force of the pressurized air bag is low in shallow water areas, and the impact on the driving column is minimized. When the equipment is in deep water areas, the clamping force of the pressurized air bag on the driving column is increased, thereby increasing the sealing of the connection position.

[0013] A sealing method for an underwater propulsion motor sealing structure comprises the following steps:

[0014] S1: Before using the present invention, the device is fixed at a desired position by means of a mounting rod and a mounting block, and the power supply of the propulsion motor is turned on. As the water level of the device deepens, the water pressure on the device will continue to increase, and the pressurized airbag and the expansion bag will expand;

[0015] S2: When the external water pressure is too deep, the expansion bag will push the pressing cover to extend outward, and the pressing cover will drive the fixing rod and the second pulling belt to move synchronously, and the length of the extension of the second pulling belt will be limited by the collecting column set inside the device;

[0016] S3: When the expansion bag reaches the maximum expansion point due to material limitation, the pull belt 2 will also be fully expanded outward. At this time, the collecting column will pull the pull belt 2 so that the pull belt 2 will no longer extend, and limit the maximum expansion position of the expansion bag by pressing the cover.

[0017] The present invention has the following beneficial effects:

[0018] (1) The present invention utilizes the fact that the water pressure in deep water areas is higher than that in shallow water areas. A pressurized air bag and an expansion bag are arranged inside the device. Before using the device, the device is fixed at a desired position by means of a mounting rod and a mounting block, and the power supply of the propulsion motor is turned on. As the water level of the device deepens, the water pressure to which the device is subjected will continue to increase. The external pressure to which the pressurized air bag in deep water is subjected is greater than that in surface waters. When the gas inside the expansion bag and the pressurized air bag cannot balance the external water pressure, the pressurized air bag and the expansion bag will expand, and the expanded expansion bag will fill the gap between the device housing and the fixing plate, presenting a Figure 4 The state shown, through the application of the above components, ensures that when the equipment reaches deep waters, the expansion bag is pressurized and expanded, plugging the gaps of various components due to cold contraction, thereby improving the sealing of the equipment.

[0019] (2) In order to solve the problem that the expansion bladder and the pressurized air bag will rupture when they swell to a certain extent, the present invention provides a pressing cover inside the device. When the external water pressure is too deep, the expansion bladder will push the pressing cover to extend outward, and the pressing cover will drive the fixing rod and the pulling belt 2 to move synchronously. The collecting column provided inside the device is used to limit the extension length of the pulling belt 2. When the expansion bladder reaches the maximum expansion point due to material limitations and the pulling belt 2 is fully expanded outward, the collecting column will pull the pulling belt 2 so that the pulling belt 2 will no longer extend. The pressing cover is used to limit the maximum expansion point of the expansion bladder, thereby avoiding excessive pressure difference between the inside and outside of the expansion bladder, which exceeds the limit that the material can withstand and causes the balloon to explode.

[0020] (3) The present invention utilizes the characteristic that the pulling belt 2 drives the collection column to rotate, and sets a tightening line inside the device. When the collection column rotates due to the pulling belt 2, the collection column drives the gear 2 and the collection wheel to rotate synchronously through the gear 1. The rotation of the collection wheel will pull the tightening line to shrink, forcing the sliding hook to move upward along the inner wall of the pressurized airbag. The pulling force generated by the sliding hook will strengthen the connection between the device casing and the fixed plate, reduce the efficiency of the component shrinking in a low temperature environment, and avoid the expansion of the gap between the device casing and the fixed plate, causing external water to enter the interior of the device and affect the sealing effect of the device.

[0021] (4) The present invention utilizes the pulling force generated by the above-mentioned sliding hook and is provided with a cleaning mechanism inside the device. When the sliding hook is pulled upward, the sliding hook will push the piston plate 1 upward, forcing the liquid inside the piston plate 1 to enter the hydraulic box 2 through the transmission hole. The liquid inside the hydraulic box 2 increases, and the supporting cylinder and the L-shaped plate are driven to move outward through the piston plate 2. As the L-shaped plate moves downward, the L-shaped plate drives the collecting belt to compress the rubber shell, so that the pressurized air bag at the bottom of the rubber shell is tightly attached to the outer wall of the driving column, thereby improving the sealing of the connection position between the driving column and the mounting plate. Through the application of the above-mentioned components, the device can autonomously adjust the clamping force between the driving column and the pressurized air bag according to the changes in the external water pressure environment, thereby ensuring that the clamping force of the pressurized air bag is low in shallow water areas, and the impact on the driving column is minimized. When the device is in deep water areas, the clamping force of the pressurized air bag on the driving column is increased, thereby increasing the sealing of the connection position. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 It is a schematic diagram of the bottom of the overall structure of the present invention;

[0025] Figure 3 It is a cross-sectional schematic diagram of the housing mechanism of the present invention;

[0026] Figure 4 It is a schematic diagram of the internal components of the housing mechanism of the present invention;

[0027] Figure 5 It is a cross-sectional schematic diagram of the control mechanism of the present invention;

[0028] Figure 6 For the present invention Figure 5 A is an enlarged schematic diagram;

[0029] Figure 7 This is a schematic diagram of the bottom of the cleaning mechanism of the present invention;

[0030] Figure 8 For the present invention Figure 7 A magnified schematic diagram of B;

[0031] Fig. 9 It is a schematic diagram of the working process of the present invention.

[0032] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0033] In the figure: 1. Shell mechanism; 101. Equipment shell; 102. Fixing plate; 103. Pressurized airbag; 104. Expansion bag; 105. Rubber shell; 106. Propulsion motor; 107. Driving column; 108. Mounting plate; 109. Sealing ring; 2. Control mechanism; 201. Fixing rod; 202. Pulling belt 1; 203. Pressing cover; 204. Pulling belt 2; 205. Fixing frame; 206. Collecting column; 207. Gear 1; 208. Gear 2; 209. Collecting wheel; 210. Take-up line; 211. Sliding hook; 3. Cleaning mechanism; 301. Hydraulic box 1; 302. Piston plate 1; 303. Hydraulic box 2; 304. Transmission hole; 305. Piston plate 2; 306. L-shaped plate; 307. Collecting belt; 308. Mounting rod; 309. Mounting block; 310. Support cylinder. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] For example, see Figure 1 - Figure 3 The present invention is an underwater propulsion motor sealing structure, comprising a housing mechanism 1, the housing mechanism 1 further comprising a device housing 101, a fixing plate 102 is fixedly connected to the bottom of the device housing 101, a pressurized airbag 103 is fixedly connected to the inner wall of the device housing 101, and an expansion bag 104 is connected through the side wall of the pressurized airbag 103;

[0036] The control mechanism 2 includes a fixed rod 201 fixedly connected to the side wall of the device housing 101, a pull belt 202 is fixedly connected to the side wall of the fixed rod 201, a pressing cover 203 is fixedly connected to the end of the pull belt 202 away from the fixed rod 201, and a pulling belt 204 is fixedly connected to the end of the pressing cover 203 away from the pulling belt 202;

[0037] The cleaning mechanism 3 includes a hydraulic box 1 301 fixedly connected to the bottom of the pressurized airbag 103, a piston plate 1 302 is slidably connected to the inner wall of the hydraulic box 1 301, a hydraulic box 2 303 is fixedly connected to the side wall of the hydraulic box 1 301, the top of the hydraulic box 1 301 is fixedly connected to the bottom of the pressurized airbag 103, a transmission hole 304 is provided on the connecting surface between the hydraulic box 2 303 and the hydraulic box 1 301, a mounting rod 308 is fixedly connected to the bottom of the pressurized airbag 103, and a mounting block 309 is fixedly connected to the side wall of the mounting rod 308.

[0038] The shell mechanism 1 also includes a rubber shell 105 which is connected to the side wall of the device shell 101. The top of the pressurized airbag 103 is fixedly connected to a propulsion motor 106. The output shaft of the propulsion motor 106 is fixedly connected to a driving column 107. Taking advantage of the fact that the water pressure in deep water areas is higher than that in shallow water areas, a pressurized airbag 103 and an expansion bag 104 are arranged inside the device. Before using the device, the device is fixed at a desired position by means of a mounting rod 308 and a mounting block 309, and the power supply of the propulsion motor 106 is turned on. As the water level of the device deepens, the water pressure to which the device is subjected will continue to increase. The external pressure to which the pressurized airbag 103 in deep water is subjected is greater than that in surface waters. When the gas inside the expansion bag 104 and the pressurized airbag 103 cannot balance the external water pressure, the pressurized airbag 103 and the expansion bag 104 will expand, and the expanded expansion bag 104 will fill the gap between the device shell 101 and the fixing plate 102, presenting a Figure 4 In the state shown, through the application of the above components, it is ensured that when the equipment reaches deep waters, the expansion bag 104 is pressurized and expanded, thereby plugging the gaps of various components due to cold contraction and improving the sealing of the equipment.

[0039] The housing mechanism 1 also includes a mounting plate 108 fixedly connected to the end of the rubber shell 105 away from the device housing 101 , a sealing ring 109 is fixedly connected to the inner wall of the through hole of the mounting plate 108 , and the inner wall of the sealing ring 109 is rotatably connected to the outer wall of the driving column 107 .

[0040] For example 2, please refer to Figure 4 - Fig. 9The present invention is an underwater propulsion motor sealing structure. On the basis of the first embodiment, the control mechanism 2 further comprises a fixing frame 205 fixedly connected to the top of the device housing 101. The inner wall of the fixing frame 205 is rotatably connected with a collecting column 206. The end of the pulling belt 204 away from the pressing cover 203 is fixedly connected to the outer wall of the collecting column 206. The two sides of the collecting column 206 are fixedly connected with a gear 1 207. In order to solve the problem that the expansion bag 104 and the pressurized air bag 103 will rupture when they swell to a certain extent, a pressing cover 203 is arranged inside the device. When the external water pressure is too deep, the expansion bag 104 will push the pressing cover 20 3 extends outward, and the pressing cover 203 will drive the fixing rod 201 and the pulling belt 204 to move synchronously. The collecting column 206 arranged inside the device will limit the extension length of the pulling belt 204. When the expansion bag 104 reaches the maximum expansion point due to the limitation of the material, the pulling belt 204 will also be fully unfolded outward. At this time, the collecting column 206 will pull the pulling belt 204 so that the pulling belt 204 will no longer extend, and the maximum expansion point of the expansion bag 104 will be limited by the pressing cover 203 to avoid excessive pressure difference between the inside and outside of the expansion bag 104, which exceeds the limit that the material can withstand and causes the balloon to explode.

[0041] The control mechanism 2 also includes a gear 208 rotatably connected to the inner wall of the fixed frame 205, a collecting wheel 209 is fixedly connected to the side wall of the gear 208, a tightening line 210 is fixedly connected to the inner wall of the collecting wheel 209, a sliding hook 211 is slidably connected to the inner wall of the fixed plate 102, and the end of the tightening line 210 away from the collecting wheel 209 is fixedly connected to the top of the sliding hook 211. The characteristic of the above-mentioned pulling belt 204 driving the collection column 206 to rotate is utilized, and the tightening line 210 is arranged inside the device. When the collection column 206 rotates due to the pulling belt 204 When the collecting column 206 drives the gear 2 208 and the collecting wheel 209 to rotate synchronously through the gear 1 207, the rotation of the collecting wheel 209 will pull the tightening line 210 to cause contraction, forcing the sliding hook 211 to move upward along the inner wall of the pressurized airbag 103, and the pulling force generated by the sliding hook 211 will strengthen the connection between the device housing 101 and the fixed plate 102, reduce the efficiency of the component shrinkage in a low temperature environment, and avoid the expansion of the gap between the device housing 101 and the fixed plate 102, causing external water to enter the interior of the device and affect the sealing effect of the device.

[0042] The cleaning mechanism 3 also includes a piston plate 305 slidably connected to the inner wall of the hydraulic box 303 , a support cylinder 310 is fixedly connected to the bottom of the piston plate 305 , and an L-shaped plate 306 is fixedly connected to the end of the support cylinder 310 away from the piston plate 305 .

[0043] The cleaning mechanism 3 also includes a collecting belt 307 fixedly connected to the top of the L-shaped plate 306, the bottom of the collecting belt 307 is slidably connected to the outer wall of the rubber shell 105, the outer wall of the sliding hook 211 is fixedly connected to the bottom of the piston plate 1 302, and a spring for resetting is fixedly connected to the inner wall of the collecting column 206. By utilizing the pulling force generated by the above-mentioned sliding hook 211, a cleaning mechanism 3 is arranged inside the device. When the sliding hook 211 is pulled upward, the sliding hook 211 will push the piston plate 1 302 to move upward, forcing the liquid inside the piston plate 1 302 to enter the hydraulic box 2 303 through the transmission hole 304. The liquid inside the hydraulic box 2 303 increases, and the supporting cylinder 310 and the L-shaped plate 302 are driven through the piston plate 2 305. The mold plate 306 moves outward, and as the L-shaped plate 306 moves downward, the L-shaped plate 306 drives the collecting belt 307 to compress the rubber shell 105, so that the pressurized airbag 103 at the bottom of the rubber shell 105 is tightly attached to the outer wall of the driving column 107, thereby improving the sealing of the connection position between the driving column 107 and the mounting plate 108. Through the application of the above components, the device can autonomously adjust the clamping force between the driving column 107 and the pressurized airbag 103 according to the changes in the external water pressure environment, thereby ensuring that the clamping force of the pressurized airbag 103 is low in shallow water areas, and the impact on the driving column 107 is minimized. When the device is in deep water areas, the clamping force of the pressurized airbag 103 on the driving column 107 is increased, thereby increasing the sealing of the connection position.

[0044] The method for using the sealing device comprises the following steps:

[0045] S1: Before using the present invention, the device is fixed at a desired position by means of the mounting rod 308 and the mounting block 309, and the power supply of the propulsion motor 106 is turned on. As the water level of the device deepens, the water pressure on the device will continue to increase, and the pressurized airbag 103 and the expansion bag 104 will expand;

[0046] S2: When the external water pressure is too deep, the expansion bag 104 will push the pressing cover 203 to extend outward, and the pressing cover 203 will drive the fixing rod 201 and the second pulling belt 204 to move synchronously, and the length of the extension of the second pulling belt 204 is limited by the collecting column 206 arranged inside the device;

[0047] S3: When the expansion bag 104 reaches the maximum expansion point due to material limitation, the pull belt 204 will also be fully expanded outward. At this time, the collecting column 206 will pull the pull belt 204 so that the pull belt 204 will no longer extend, and limit the maximum expansion position of the expansion bag 104 by pressing the cover 203.

[0048] A specific application of this embodiment is: the present invention utilizes the fact that the water pressure in deep water areas is higher than that in shallow water areas, and a pressurized airbag 103 and an expansion bag 104 are arranged inside the device. Before using the device, the device is fixed at the desired position by means of the mounting rod 308 and the mounting block 309, and the power supply of the propulsion motor 106 is turned on. As the water level of the device deepens, the water pressure to which the device is subjected will continue to increase, wherein the external pressure to which the pressurized airbag 103 in deep water is subjected is greater than that in surface waters. When the gas inside the expansion bag 104 and the pressurized airbag 103 cannot balance the external water pressure, the pressurized airbag 103 and the expansion bag 104 will expand, and the expanded expansion bag 104 will fill the gap between the device housing 101 and the fixing plate 102, presenting a Figure 4 In the state shown, by using the above components, it is ensured that when the equipment reaches deep waters, the expansion bag 104 is pressurized and expanded, plugging the gaps of each component due to cold contraction, thereby improving the sealing of the equipment; in order to solve the problem that the expansion bag 104 and the pressurized air bag 103 will rupture when they swell to a certain extent, a pressing cover 203 is arranged inside the equipment. When the external water pressure is too deep, the expansion bag 104 will push the pressing cover 203 to extend outward, and the pressing cover 203 will drive the fixing rod 201 and the pulling belt 204 to move synchronously, By setting a collecting column 206 inside the device, the extended length of the pulling belt 204 is limited. When the expansion bag 104 reaches the maximum expansion point due to the limitation of the material, the pulling belt 204 is also fully expanded outward. At this time, the collecting column 206 will pull the pulling belt 204 so that the pulling belt 204 will no longer extend, and the maximum expansion point of the expansion bag 104 is limited by pressing the cover 203 to avoid excessive pressure difference between the inside and outside of the expansion bag 104, which exceeds the limit that the material can withstand and causes the balloon to explode.

[0049] Taking advantage of the characteristic that the pulling belt 204 drives the collecting column 206 to rotate, a tightening line 210 is set inside the device. When the collecting column 206 rotates due to the pulling belt 204, the collecting column 206 drives the gear 208 and the collecting wheel 209 to rotate synchronously through the gear 1 207. The rotation of the collecting wheel 209 will pull the tightening line 210 to shrink, forcing the sliding hook 211 to move upward along the inner wall of the pressurized airbag 103. The pulling force generated by the sliding hook 211 will strengthen the connection between the device housing 101 and the fixed plate 102, reduce the efficiency of the component shrinkage in a low temperature environment, and avoid the expansion of the gap between the device housing 101 and the fixed plate 102, causing external water to enter the interior of the device and affect the sealing effect of the device.

[0050] When the sliding hook 211 generates a pulling force, the sliding hook 211 will push the piston plate 1 302 upward, forcing the liquid inside the piston plate 1 302 to enter the hydraulic box 2 303 through the transmission hole 304. The liquid inside the hydraulic box 2 303 increases, and the supporting cylinder 310 and the L-shaped plate 306 are driven to move outward through the piston plate 2 305. As the L-shaped plate 306 moves downward, the L-shaped plate 306 drives the collecting belt 307 to press the rubber shell 105, so that the pressurized airbag 103 at the bottom of the rubber shell 105 is tightly attached to the rubber shell 105. The outer wall of the driving column 107 improves the sealing performance of the connection position between the driving column 107 and the mounting plate 108. Through the application of the above components, the device can autonomously adjust the clamping force between the driving column 107 and the pressurized airbag 103 according to the changes in the external water pressure environment, thereby ensuring that the clamping force of the pressurized airbag 103 is low in shallow water areas, thereby minimizing the impact on the driving column 107. When the device is in deep water areas, the clamping force of the pressurized airbag 103 on the driving column 107 is increased, thereby increasing the sealing performance of the connection position.

[0051] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. An underwater propulsion motor sealing structure, comprising a housing mechanism (1), the housing mechanism (1) further comprising a device housing (101), a fixing plate (102) being fixedly connected to the bottom of the device housing (101), a pressurized airbag (103) being fixedly connected to the inner wall of the device housing (101), and an expansion bag (104) being connected through the side wall of the pressurized airbag (103), characterized in that: Also includes: A control mechanism (2), the control mechanism (2) comprising a fixing rod (201) fixedly connected to a side wall of a device housing (101), a pulling belt 1 (202) fixedly connected to the side wall of the fixing rod (201), a pressing cover (203) fixedly connected to one end of the pulling belt 1 (202) away from the fixing rod (201), and a pulling belt 2 (204) fixedly connected to one end of the pressing cover (203) away from the pulling belt 1 (202); A cleaning mechanism (3), the cleaning mechanism (3) comprising a hydraulic box one (301) fixedly connected to the bottom of a pressurized airbag (103), a piston plate one (302) being slidably connected to the inner wall of the hydraulic box one (301), a hydraulic box two (303) being fixedly connected to the side wall of the hydraulic box one (301), the top of the hydraulic box one (301) being fixedly connected to the bottom of the pressurized airbag (103), a transmission hole (304) being provided on the connecting surface between the hydraulic box two (303) and the hydraulic box one (301), a mounting rod (308) being fixedly connected to the bottom of the pressurized airbag (103), and a mounting block (309) being fixedly connected to the side wall of the mounting rod (308); The control mechanism (2) further comprises a fixing frame (205) fixedly connected to the top of the device housing (101), a collecting column (206) being rotatably connected to the inner wall of the fixing frame (205), an end of the second pulling belt (204) away from the pressing cover (203) being fixedly connected to the outer wall of the collecting column (206), and gears (207) being fixedly connected to both sides of the collecting column (206); The control mechanism (2) further comprises a gear 2 (208) rotatably connected to the inner wall of the fixed frame (205); a collecting wheel (209) is fixedly connected to the side wall of the gear 2 (208); a tightening line (210) is fixedly connected to the inner wall of the collecting wheel (209); a sliding hook (211) is slidably connected to the inner wall of the fixed plate (102); and one end of the tightening line (210) away from the collecting wheel (209) is fixedly connected to the top of the sliding hook (211).

2. The underwater propulsion motor sealing structure according to claim 1, characterized in that: The housing mechanism (1) further comprises a rubber shell (105) which is connected to the side wall of the device housing (101) through a penetration, a propulsion motor (106) is fixedly connected to the top of the pressurized airbag (103), and an output shaft of the propulsion motor (106) is fixedly connected to a driving column (107).

3. The underwater propulsion motor sealing structure according to claim 2, characterized in that: The housing mechanism (1) further comprises a mounting plate (108) fixedly connected to an end of the rubber shell (105) away from the device housing (101); a sealing ring (109) is fixedly connected to the inner wall of the through hole of the mounting plate (108); and the inner wall of the sealing ring (109) is rotatably connected to the outer wall of the driving column (107).

4. The underwater propulsion motor sealing structure according to claim 3 is characterized in that: The cleaning mechanism (3) further comprises a piston plate 2 (305) slidably connected to the inner wall of the hydraulic box 2 (303), the bottom of the piston plate 2 (305) being fixedly connected to a supporting cylinder (310), and the end of the supporting cylinder (310) away from the piston plate 2 (305) being fixedly connected to an L-shaped plate (306).

5. The underwater propulsion motor sealing structure according to claim 4, characterized in that: The cleaning mechanism (3) further comprises a collecting belt (307) fixedly connected to the top of the L-shaped plate (306), the bottom of the collecting belt (307) being slidably connected to the outer wall of the rubber shell (105), the outer wall of the sliding hook (211) being fixedly connected to the bottom of the piston plate (302), and a spring for resetting being fixedly connected to the inner wall of the collecting column (206).

6. A method for using an underwater propulsion motor sealing structure according to claim 5, characterized in that: The steps include: S1: Before using the underwater propulsion motor sealing structure, the device is fixed at a desired position by means of a mounting rod (308) and a mounting block (309), and the power supply of the propulsion motor (106) is turned on. As the water level of the device deepens, the water pressure on the device will continue to increase, and the pressurized airbag (103) and the expansion bag (104) will expand; S2: When the external water pressure is too deep, the expansion bag (104) will push the pressing cover (203) to extend outward, and the pressing cover (203) will drive the fixing rod (201) and the second pulling belt (204) to move synchronously, and the length of the extension of the second pulling belt (204) is limited by the collecting column (206) arranged inside the device; S3: When the expansion bag (104) reaches the maximum expansion point due to the limitation of the material, the pull belt 2 (204) will also be fully expanded outward. At this time, the collecting column (206) will pull the pull belt 2 (204) so ​​that the pull belt 2 (204) will no longer extend, and limit the maximum expansion position of the expansion bag (104) by pressing the cover (203).

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