CN116201875A - Underwater emergency electromechanical actuator - Google Patents

Abstract

The invention relates to an electromechanical actuator, in particular to an underwater emergency electromechanical actuator, wherein a shell is connected with a buffer type sealing device, the buffer type sealing control device comprises a hydrophobic medium filled in the shell and a pressure control device arranged on the shell, and the pressure control device is arranged in such a way that when the hydrophobic medium is lost in the shell, the pressure control device drives the hydrophobic medium to be supplemented to the lost part, and as the shell is provided with a plurality of parts to be sealed, the sealing is usually realized by using a sealing ring, a sealing bearing, an oil seal and other structures, so that the leakage is difficult to judge specifically which part is leaked, the pressure of the hydrophobic medium at any sealing position can be simultaneously controlled through the buffer type sealing device, and the pressure of the hydrophobic medium can be supplemented in real time when the leakage occurs, thereby realizing the effect of dynamic sealing at any moment.

Description

Underwater emergency electromechanical actuator

technical field

The invention relates to an electromechanical actuator, in particular to an underwater emergency electromechanical actuator.

Background technique

In recent years, with the rapid development of the ocean and lake fields, there are more and more various underwater operations, exploration, mining, and construction. Especially in some occasions, workers need to work underwater, which poses a challenge to the safety of underwater operating equipment and personnel. . The underwater environment is complex and faces the danger of water pressure and water leakage. Therefore have to consider the occurrence of an accident, in an emergency, the safety of the equipment and personnel.

The underwater emergency electromechanical actuator has the characteristics of good insulation, strong water pressure resistance, and reliable sealing. The power supply and operating system are self-contained. When the system fails, it can be used as a backup for emergency actions, such as emergency action switches and underwater cables. emergency cut-off, etc.

The existing underwater emergency electromechanical actuator includes a housing, and a telescopic device is arranged in the housing, and the end of the telescopic device extends outward through the housing, and the end of the telescopic device and the housing are slidably sealed The telescopic device is connected with a driving device, and the driving device is connected to a power supply. The telescopic device is generally an oil cylinder, and the driving device is a hydraulic station, which is sealed by redundant sealing to prevent water from entering the housing. Large, the whole tank is elastically deformed under water pressure. When the water depth changes, the water pressure changes, and the recovery process of the elastic body will easily suck water into the shell to increase the risk of water leakage.

Contents of the invention

The purpose of the present invention is to overcome the deficiencies in the prior art, and provide an underwater emergency electromechanical actuator capable of supplementing a hydrophobic medium to a sealing position, and further blocking water at a leaking position.

The present invention is achieved through the following technical solutions: an underwater emergency electromechanical actuator, including a housing, a telescopic device is arranged inside the housing, the end of the telescopic device extends outward through the housing, and the telescopic device The sliding and sealing connection between the end of the telescopic device and the housing, the telescoping device is connected with a driving device, the driving device is connected to a power supply, the housing is connected with a buffer type sealing device, and the buffer type sealing control device includes filling in the housing The hydrophobic medium and the pressure control device arranged on the housing are configured such that when the housing loses the hydrophobic medium, the pressure control device drives the hydrophobic medium to supplement the loss.

Further, the telescopic device includes a telescopic sleeve, the telescopic sleeve is in a sliding and sealed connection with the casing, the telescopic sleeve is connected with a push rod, and the push rod is connected to the driving device.

Further, the telescopic sleeve is threadedly connected to the push rod, the outer side of the telescopic sleeve is provided with a guide key, and the housing is provided with a chute matching with the guide key.

Further, the hydrophobic medium is selected from 320# gear lubricating oil.

Further, the pressure control device includes an expansion body arranged in the casing, configured to expand the expansion body when it is detected that the pressure in the casing drops.

Further, the expansion body is an air bag, and the air bag is made of rubber material.

Further, the airbag communicates with the outside of the housing.

The beneficial effect of the present invention is that: the underwater emergency electromechanical actuator, the housing is connected with a buffer type sealing device, the buffer type sealing control device includes a hydrophobic medium filled in the housing, and a pressure control device arranged on the housing, set Because, when there is a loss of hydrophobic medium in the shell, the pressure control device drives the hydrophobic medium to replenish to the loss. Since there are many places in the shell that need to be sealed, the seal usually uses structures such as sealing rings, sealed bearings, and oil seals. It is difficult to judge the specific Where leakage occurs, the buffer-type sealing device can simultaneously control the pressure of the hydrophobic medium at any sealing position, and replenish it in real time when leakage occurs, thereby achieving the effect of dynamic sealing at any time.

Description of drawings

Fig. 1 is the structural representation of embodiment 1;

Fig. 2 is a front view sectional schematic diagram of embodiment 1;

Fig. 3 is a schematic diagram of the structure of the transmission mechanism;

Fig. 4 is a schematic cross-sectional view of the front view of the upper cover;

Figure 5 is a schematic top view of the housing;

Figure 6 is a schematic diagram of the structure of the integrated ball screw pair;

Figure 7 is a schematic diagram of the lug structure.

Among them: 1. Shell; 2. Upper cover plate; 3. Accumulator; 4. Integrated ball screw pair; 5. Lugs; 6. Check valve; 7. Underwater motor; 8. Gear box; 9. Mounting plate; 10. Big gear; 11. Round nut one; 12. Deep groove ball bearing; 13. Pinion; 14. Round nut two; 15. Thrust bearing; 16. Gearbox shell; 17. Closed Driver and power supply; 18, pressure plate; 19, vulcanized cable; 21, upper cover sealing ring; 22, accumulator sealing ring; 23, dust-proof ring; 24, gray ring; 25, wear-resistant ring; 28. Joint bearing; 29. Mounting plate connection seat; 30. Guide keyway; 31. Integrated nut; 32. Lead screw; 33. Guide key.

Detailed ways

In the description of the present invention, it should also be noted that, unless otherwise clearly specified and limited, the terms "installation", "installation", "connection" and "connection" should be understood in a broad sense, for example, it may be a fixed connection, It can also be a detachable connection or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediary, and it can be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention in specific situations.

The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Example 1

As shown in Figure 1-7, an underwater emergency electromechanical actuator includes a shell 1, the main load-bearing parts are processed by die forging, in order to reduce the sealing position, the lower part is in a closed form, and the upper end of the shell 1 is sealed with an upper Cover plate 2, an upper cover plate sealing ring 21 is installed between the upper cover plate and the housing, a telescopic device is installed in the housing 1, and the end of the telescopic device extends outward through the housing 1, and the end of the telescopic device is in contact with the housing 1 are connected in a sliding and sealed manner, the telescopic device is connected with a driving device, and the driving device is connected with a power supply. Specifically, the telescopic device includes a telescopic sleeve, and the telescopic sleeve is connected with a sliding seal with the shell. The telescopic sleeve is connected with a push rod, and the push rod is connected to the drive device, the telescopic sleeve and the push rod are threadedly connected, there is a guide key on the outside of the telescopic sleeve, and there is a chute matching the guide key on the housing 1. More specifically, the telescopic device of this embodiment uses an integrated ball screw pair 4. The push rod is a lead screw 32, and the telescopic sleeve is an integrated nut 31. A guide key 33 is processed on the outer wall of the integrated nut, and a chute matching the guide key is processed on the side wall of the housing 1, thereby limiting the movement of the integrated nut. Circular motion, thereby converting rotary motion into linear motion, an underwater motor 7 with a gear box is installed in the casing, and a mounting plate 9 is installed at the bottom of the shell 1 through the mounting plate connecting seat 29, and the mounting plate connecting seat and the shell The body is integrally formed, and the gear box and the lead screw are driven by a transmission module installed on the mounting plate. The transmission module includes a thrust bearing mounting hole installed on the mounting plate, and a pair of thrust bearings is installed opposite to the integrated ball screw pair. The bearing 15 bears the axial force, and the driving end of the integrated ball screw pair uses round nut 214 to axially fix the large gear on the integrated ball screw pair 4, and the underwater motor 7 and the gear box 8 are fixed on the installation by bolts. On the board, a round nut 11 is used to fix the large gear 10, a small gear 13 is located between the underwater motor, the gear box and the integrated ball screw pair, deep groove ball bearings 12 are installed on both sides, and one side is located in the mounting plate , one side is located inside the gearbox housing 1, the mounting plate is fixed inside the housing 1 by bolts, and the gearbox housing 1 is fixed on the back of the mounting plate by bolts, which isolates the large gear and the small gear from other parts to prevent them from running The metal scraps from the gear enter other parts, and play the role of supporting and fixing the pinion and protecting the gear pair. The gear box housing is also connected to the mounting plate to protect the gear.

In order to achieve better sealing, a hole is opened in the middle of the upper cover plate 2 to cooperate with the integrated ball screw pair. The working end of the integrated ball screw pair passes through the hole outwards and is connected with lugs 5. The lugs are used for Connected to the actuator, joint bearings 28 are installed in the lugs, which can adapt to the angle of the transmission rod, and the inside is sequentially equipped with a dust-proof ring 23, a gray ring 24, and a wear-resistant ring 25. The dust-proof ring prevents large particles of excess, Impurities enter the interior of the underwater emergency electromechanical actuator, between the upper cover plate 2 and the nut, contaminate the internal hydrophobic medium, cause internal jamming or scratch the surface of the nut, and the gray ring acts as a seal to isolate the ambient water from the internal hydrophobic medium. The wear-resistant ring is in contact with the surface of the nut to play the role of supporting the nut and guiding it. One side of the upper cover plate 2 faces inward for the installation platform of the accumulator 3, and the other side is the installation platform for the one-way valve. O-ring installation grooves are provided on the surface , the upper cover plate 2 is connected to the housing 1 by bolts, and a check valve 6 is installed on the check valve installation platform, so that hydrophobic medium can be filled after assembly, and the pressure inside the housing can be controlled to be stable, avoiding overpressure and ensuring A certain amount of positive pressure.

The housing 1 is connected with a buffer-type sealing device, the buffer-type sealing control device includes a hydrophobic medium filled in the housing 1, and a pressure control device installed in the housing 1, which is set so that when the housing 1 loses the hydrophobic medium, The pressure control device drives the hydrophobic medium to replenish to the loss. Specifically, the hydrophobic medium is 320# gear lubricating oil. The pressure control device includes an expansion body arranged in the shell 1. It is set so that when the pressure in the shell 1 drops When the expansion body expands, the expansion body is an air bag, and the air bag is made of rubber material, specifically selected from NBR, with a wall thickness of 8-10mm, which has relatively large elasticity, and the air bag occupies 1/10 of the volume of the shell 1, thereby providing a large With a good buffer volume, the airbag communicates with the outside of the housing 1, and then supplements the pressure of the airbag with the help of water pressure. The airbag forms an accumulator 3 structure, which slowly releases the pressure during use, and then squeezes the hydrophobic medium to the loss. And then realize the effect of dynamic sealing at any time. The lower end of the upper cover plate 2 is integrally formed with an accumulator 3 connecting seat, and an accumulator sealing ring 22 is installed at the connecting seat of the accumulator 3, thereby strengthening the sealing. On the upper cover plate 2, a one-way valve mounting plate is also processed. There is a one-way valve sealing ring 26 at the one-way valve mounting plate, and the one-way valve is installed. #Gear lubricating oil, lubricating the large gear, pinion, and integrated ball screw pair.

The underwater emergency electromechanical actuator provided in this embodiment, in order to realize independent work, is equipped with a closed driver and a power supply 17 in the housing, and the driver and the power supply are sealed and packaged in a sheet metal box body to achieve a higher waterproof effect. The vulcanized cable 19 is electrically connected to the controller to control and maintain the voltage. When the power feed is detected, it will be charged in time. Since it is an emergency electromechanical actuator, the number of actions to be completed is small, and some equipment only needs to complete one action. , the required power is low, and the corresponding power supply is small in size. The underwater motor is a servo motor, and the controller is a servo controller corresponding to the servo motor. Driven by the servo motor, the action accuracy is high. Install the installation groove of the sealed driver and the power supply, and after the sealed driver and the power supply are placed in the installation groove, they are fixed on the upper end by the pressure plate 18, and then the installation is completed.

In this embodiment, the housing is integrally forged and formed for high-pressure sealing testing, and the sealing performance is high.

Finally, it should be noted that: the above is only a preferred embodiment of the present invention, and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, it still It is possible to modify the technical solutions recorded in the foregoing embodiments, or to perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. within the spirit and principles of the present invention shall be included in the within the protection scope of the present invention.

Claims (7)

1. The utility model provides an emergency electromechanical action ware under water, includes the casing, be provided with telescoping device in the casing, the terminal of telescoping device passes the casing and outwards extends, sliding seal connects between telescoping device's terminal and the casing, telescoping device is connected with drive arrangement, drive arrangement connects the power, a serial communication port, the casing is connected with buffering type sealing device, buffering type sealing control device is including filling the hydrophobic medium in the casing to and set up in the pressure control device of casing, set up, when the casing has the hydrophobic medium to lose, pressure control device drive hydrophobic medium supplements to loss department.

2. The subsea emergency electro-mechanical actuator of claim 1, characterized in that the telescoping device comprises a telescoping sleeve in sliding sealing connection with the housing, the telescoping sleeve being connected with a push rod connected to the drive device.

3. The underwater emergency electromechanical actuator according to claim 2, wherein the telescopic sleeve is in threaded connection with the push rod, a guide key is arranged on the outer side of the telescopic sleeve, a sliding groove matched with the guide key is formed in the shell, and the driving device drives the push rod to rotate.

4. The subsea emergency electro-mechanical actuator of claim 1, characterized in that the hydrophobic medium is selected from gear lubrication No. 320.

5. An underwater emergency electro-mechanical actuator as in claim 1, wherein the pressure control means comprises an expansion body disposed within the housing, arranged to expand when a pressure drop within the housing is detected.

6. The subsea emergency electro-mechanical actuator of claim 5, characterized in that the expansion body is a balloon made of a rubber material.

7. The subsea emergency electro-mechanical actuator of claim 6, characterized in that the bladder communicates with the housing exterior.

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