Double-helix oscillating cylinder with oil distribution function for underwater joint

Abstract

The invention discloses a double-helix oscillating cylinder with an oil distribution function for an underwater joint, and belongs to the technical field of hydraulic cylinders. The piston rod is of a hollow structure and internally provided with an angle sensor. The piston rod is sleeved with the piston and the guide sleeve and then is arranged in the cylinder body, rotary seals are arranged on the matching surfaces of the piston and the guide sleeve with the cylinder body, thrust bearings are arranged between the piston rod and the cylinder body as well as between the guide sleeve and the cylinder body, two rotary seals are also arranged on the two sides of the thrust bearings, and the piston rod, the guide sleeve and the cylinder body are connected together through the gland; the piston rod and the guide sleeve are each provided with three sets of oil way channels, the multiple oil way channels can distribute oil for other hydraulic elements following the joint, multiple hydraulic hoses are replaced, and large-rotation-angle rotation movement of the underwater joint is achieved. An angle signal is collected through a built-in angle sensor, and the rotation angle of the swing cylinder can be accurately controlled. The invention has the characteristics of good deep sea environment adaptability, low processing difficulty, small damage to the sealing element, convenience in assembly, high production efficiency, long service life and the like.

Description

Technical Field

[0001] The invention relates to the technical field of hydraulic cylinders, and in particular to a double-helix swing cylinder with an oil distribution function for underwater joints. Background Art

[0002] Conventional double-helix swing cylinders are not designed to be sealed for underwater applications. They generally use a threaded structure to transmit torque and axial force at the same time, and they cannot accurately control the output angle. Moreover, as a joint on the overall equipment, it is impossible to directly arrange the oil supply circuits of other components following the joint. In the case of limited space, the rotation of the overall equipment structure may cause the oil supply pipelines of related components to entangle and interfere with each other, making it difficult to arrange. Therefore, conventional double-helix swing cylinders cannot meet the actual working conditions. Summary of the invention

[0003] In view of this, the present invention provides a double-helix swing cylinder with oil distribution function for underwater joints. Multiple oil channels integrated internally can replace multiple hydraulic hoses to distribute oil to other subsequent hydraulic components of the joints, thereby realizing large-angle rotational movement of the underwater joints; the angle signal is collected by the built-in angle sensor to accurately control the rotation angle of the swing cylinder.

[0004] A double-helix swing cylinder with oil distribution function for underwater joints, comprising a piston rod, a piston, a guide sleeve, a threaded gland, an angle sensor, a thrust bearing and a cylinder body;

[0005] The piston rod is a hollow structure and has a built-in angle sensor;

[0006] The piston rod is sleeved with a piston and a guide sleeve and then installed in the cylinder body. Two rotating seals are installed on the matching surfaces of the piston and the guide sleeve with the cylinder body. Thrust bearings are arranged between the piston rod and the guide sleeve and the cylinder body. Two rotating seals are also arranged on both sides of the thrust bearing. The piston rod, the guide sleeve and the cylinder body are connected together through a gland.

[0007] There are three sets of oil channels on the piston rod and the guide sleeve respectively. The first channel leads to the piston chamber to supply oil to itself. The second channel passes through two rotating seals of the piston, the guide sleeve and the cylinder body to the two right-angle joints of the cylinder body to supply oil to the hydraulic components on other structures; the third channel passes through the two rotating seals of the thrust bearing to the other two right-angle joints of the cylinder body.

[0008] Furthermore, it also includes a sensor mounting seat, a sealing end cover, a transmission shaft, a shift rod joint, a shift rod, a shift block, a shift block seat and a watertight socket;

[0009] The sensor mounting seat is installed in the inner hole of the left end of the piston rod, the sealing end cover passes through the transmission shaft and is installed on the end face of the inner hole of the left end of the piston rod, the shift rod joint is sleeved on the transmission shaft, the shift rod passes through the shift block and is connected to the shift rod joint, the shift rod and the shift block are fixed by nuts, and the shift block is fixed to the shift block seat of the cylinder body by bolts; the cable of the angle sensor is connected to the cable in the watertight socket, and then the excess cable is put into the inner hole of the piston rod, and the watertight socket is fixed to the right end face of the piston rod by bolts after the seal is installed.

[0010] Furthermore, the guide sleeve and the piston rod adopt a convex polygonal structure in the profile connection to transmit torque, and the end of the piston rod adopts a threaded cover to limit and transmit axial force. After the hydraulic oil is respectively input into the two chambers, the guide sleeve and the piston rod can synchronously swing the double-headed output rotation angle and rotational torque relative to the cylinder body.

[0011] Furthermore, there is a rotating seal between the transmission shaft and the sensor end cover, an O-ring is sealed between the sensor end cover and the piston rod, and O-rings are sealed on the end face and radial direction between the watertight socket and the piston rod, thereby ensuring that the angle sensor sealing structure can meet deep-sea application requirements.

[0012] Furthermore, the two cavities on the cylinder body are provided with plug seats, and the plug seats are used to install the vent plugs.

[0013] Furthermore, the guide sleeve and the piston rod are provided with three sets of rotating seals, one inside and one outside, to meet the application requirements of sealing the internal oil circuit and preventing external pressure seawater.

[0014] Beneficial effects:

[0015] 1. The piston rod and the guide sleeve of the present invention each have three sets of oil channels, one for oil supply itself, one through two rotary seals to the two right-angle joints of the cylinder body to supply oil to the hydraulic components on other structures; the other through two rotary seals of the thrust bearing to the other two right-angle joints of the cylinder body, which not only plays the role of supplying oil to the hydraulic components on other structures but also plays the role of lubricating the thrust bearing. This makes the double-helix swing cylinder have an oil distribution function, which can meet the oil supply needs of other components on the overall equipment and avoid pipeline interference problems.

[0016] 2. The piston rod of the present invention is a hollow structure and has a built-in angle sensor. When it rotates, the angle sensor obtains a rotation signal. The rear cable of the angle sensor passes through the watertight socket at the other end of the hollow piston rod and is connected out. The angle sensor can collect real-time rotation signals so that the double-helix swing cylinder with oil distribution function for the underwater joint can accurately control the rotation angle.

[0017] 3. The two chambers on the cylinder body of the present invention are provided with plug seats for installing bleed plugs to discharge gas in the hydraulic system, avoid hydraulic fluctuations, and ensure the normal operation of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural diagram of a double-helix swing cylinder with oil distribution function for an underwater joint of the present invention;

[0019] Figure 2 The oil circuit diagram of the double-helix swing cylinder with oil distribution function for the underwater joint of the present invention;

[0020] Figure 3 This is a cylinder structure diagram of a double-helix swing cylinder with an oil distribution function for an underwater joint of the present invention.

[0021] Among them, 1-shift rod, 2-shift rod joint, 3-drive shaft, 4-sealing end cover, 5-sensor mounting seat, 6-angle sensor, 7-piston rod, 8-thrust bearing, 9-cylinder body, 10-piston, 11-guide sleeve, 12-threaded gland, 13-watertight socket, 14-shift block, 15-shift block seat, 16-right angle joint, 17-cylinder barrel, 18-mounting flange, 19-plug seat, 20-vent plug. DETAILED DESCRIPTION

[0022] The present invention is described in detail below with reference to the accompanying drawings and embodiments.

[0023] As attached Figure 1 and 3 As shown, the present invention provides a double-helix swing cylinder with oil distribution function for underwater joints, which is mainly composed of a lever 1, a lever joint 2, a transmission shaft 3, a sealing end cover 4, a sensor mounting seat 5, an angle sensor 6, a piston rod 7, a thrust bearing 8, a cylinder body 9, a piston 10, a guide sleeve 11, a threaded gland 12, a watertight socket 13 and a seal. During assembly, the piston rod 7, the piston 10, and the guide sleeve 11 are first assembled with seals to complete the assembly, and then the thrust bearing 8 is respectively assembled on the piston rod 7 and the guide sleeve 11, and then the piston rod 7 with the above parts is assembled into the cylinder body 9, and then the piston 10 is installed, and then the guide sleeve 11 is installed, and then the piston rod 7 and the guide sleeve 11 are connected with the threaded gland 12 to complete the assembly of the swing cylinder. The assembly process of the rotation signal acquisition system is as follows: first, connect the transmission shaft 3, the sensor mounting seat 5, and the angle sensor 6 together to complete the assembly; secondly, install the sensor mounting seat 5 into the inner hole at the left end of the piston rod 7; then pass the sealing end cover 4 through the transmission shaft 3 and install it on the end face of the inner hole at the left end of the piston rod 7; then put the shift rod joint 2 on the transmission shaft 3; then pass the shift rod 1 through the shift block 14 and connect it to the shift rod joint 2; fix the shift rod 1 and the shift block 14 with nuts; and fix the shift block 14 to the shift block seat 15 of the cylinder body 9 with bolts; then lead out the cable of the angle sensor 6 and connect it to the cable in the watertight socket 13; then put the excess cable into the inner hole of the piston rod 7; finally, install the seal on the watertight socket 13 and fix it to the right end face of the piston rod 7 with bolts.

[0024] The piston rod 7 and the guide sleeve 11 each have three sets of oil passages. Figure 1 The oil passage 1 in the figure is a schematic diagram of the passage for self-oil supply. Figure 2 The oil passage 2 passes through two rotary seals to the two right-angle joints of the cylinder body 9 to supply oil to the hydraulic components on other structures; the oil passage 3 passes through the two rotary seals of the thrust bearing 8 to the other two right-angle joints of the cylinder body 9. This route not only supplies oil to the hydraulic components on other structures but also lubricates the thrust bearing 8.

[0025] The two chambers on the cylinder body 9 are provided with plug seats for installing the bleed plug 20 to discharge the gas in the hydraulic system, avoid hydraulic fluctuations, and ensure the normal operation of the system.

[0026] The above implementation process first simplifies the assembly. The guide sleeve 11 can be directly pressed in without rotation, so that there is no screwing action during the installation of the seal. Therefore, the seal will not be twisted and deformed to produce resistance. At the same time, the convex polygon structure is used to transmit torque and the threaded structure is used to transmit axial force, respectively, avoiding the risk of fatigue bite that is easily generated by the threaded structure transmitting torque and axial force at the same time. Secondly, because the angle sensor 6 can collect real-time rotation signals, the underwater joint can accurately control the rotation angle with a double-helix swing cylinder with an oil distribution function. Again, because there is a sealing structure for external seawater and internal hydraulic oil, the double-helix swing cylinder can meet the underwater application environment. At the same time, because it has an oil distribution function, it can meet the oil supply needs of other components on the overall equipment, avoiding the problem of pipeline interference. A vent plug 20 is provided on the secondary swing cylinder, which can better ensure the normal operation of the hydraulic system. Finally, because of the above effects, the present invention has good controllability and adaptability to deep-sea environments, and has the characteristics of high control accuracy, low processing difficulty, small damage to seals, convenient assembly, high production efficiency, stable system and long service life.

[0027] In summary, the above are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A double-helix swing cylinder with oil distribution function for underwater joints, characterized in that: It includes a piston rod, a piston, a guide sleeve, a threaded gland, an angle sensor, a thrust bearing and a cylinder body; The piston rod is a hollow structure and has a built-in angle sensor; The piston rod is sleeved with a piston and a guide sleeve and then installed in the cylinder body. Two rotating seals are installed on the matching surfaces of the piston and the guide sleeve with the cylinder body. Thrust bearings are arranged between the piston rod and the guide sleeve and the cylinder body. Two rotating seals are also arranged on both sides of the thrust bearing. The piston rod, the guide sleeve and the cylinder body are connected together through a gland. There are three sets of oil channels on the piston rod and the guide sleeve respectively. The first channel leads to the piston chamber to supply oil to itself. The second channel passes through two rotating seals of the piston, the guide sleeve and the cylinder body to the two right-angle joints of the cylinder body to supply oil to the hydraulic components on other structures; the third channel passes through the two rotating seals of the thrust bearing to the other two right-angle joints of the cylinder body.

2. A double-helix swing cylinder with oil distribution function for underwater joints as claimed in claim 1, characterized in that: It also includes a sensor mounting base, a sealing end cover, a transmission shaft, a shift rod joint, a shift rod, a shift block, a shift block seat and a watertight socket; The sensor mounting seat is installed in the inner hole of the left end of the piston rod, the sealing end cover passes through the transmission shaft and is installed on the end face of the inner hole of the left end of the piston rod, the shift rod joint is sleeved on the transmission shaft, the shift rod passes through the shift block and is connected to the shift rod joint, the shift rod and the shift block are fixed by nuts, and the shift block is fixed to the shift block seat of the cylinder body by bolts; the cable of the angle sensor is connected to the cable in the watertight socket, and then the excess cable is put into the inner hole of the piston rod, and the watertight socket is fixed to the right end face of the piston rod by bolts after the seal is installed.

3. A double-helix swing cylinder with oil distribution function for underwater joints as claimed in claim 2, characterized in that: The guide sleeve and the piston rod adopt a convex polygonal structure in the profile connection to transmit torque, and the end of the piston rod adopts a threaded cover to limit and transmit axial force. After the hydraulic oil is respectively input into the two chambers, the guide sleeve and the piston rod can synchronously swing the double heads relative to the cylinder body to output the rotation angle and rotation torque.

4. A double-helix swing cylinder with oil distribution function for underwater joints as claimed in claim 3, characterized in that: There is a rotating seal between the transmission shaft and the sensor end cover, an O-ring is sealed between the sensor end cover and the piston rod, and O-rings are sealed on the end face and radially between the watertight socket and the piston rod, thereby ensuring that the angle sensor sealing structure can meet deep-sea application requirements.

5. A double-helix swing cylinder with oil distribution function for underwater joints as claimed in claim 3 or 4, characterized in that: The two cavities on the cylinder body are provided with plug seats, and the plug seats are used for installing the venting plugs.

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