Spiral oscillating cylinder applied to deep sea

Abstract

The utility model discloses a spiral oscillating cylinder applied to deep sea, and belongs to the technical field of hydraulic cylinders. The spiral oscillating cylinder comprises an encoder driving lever, a transmission shaft, an encoder mounting seat, an encoder, a bearing, a piston rod, a cylinder body, a piston, a guide sleeve, an expansion coupling sleeve and a watertight joint; after the piston rod, the piston and the guide sleeve are sleeved with the sealing pieces, the piston rod is arranged in the cylinder body and then matched with the piston and the guide sleeve, and the piston rod, the guide sleeve and the cylinder body are connected together through the expansion coupling sleeve. A bearing is arranged between the axial matching surfaces of the piston rod, the guide sleeve and the cylinder body; the encoder mounting seat is located in a left-end inner hole of the piston rod, the encoder sealing end cover penetrates through the transmission shaft to be installed on the end face of the left-end inner hole of the piston rod, two ends of the encoder driving lever are connected with the driving block on the cylinder body and the transmission shaft respectively, and a cable of the encoder is led out to be connected with a cable in a watertight connector in a right-end inner hole of the piston rod. The problems of application of the spiral oscillating cylinder in the deep sea environment, thread fatigue engagement, sealing element torsion and the like can be solved.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic cylinder technology, specifically to a spiral swing cylinder for use in the deep sea. Background Technology

[0002] Conventional double-helix oscillating cylinders lack sealing designs for deep-sea applications and employ a threaded connection between the piston rod and guide sleeve. This structure presents several problems: 1. It lacks a pressure-resistant sealing design, making it unsuitable for deep-sea environments; 2. The coaxiality requirements for the piston rod thread, guide sleeve thread, and cylinder bore are high; otherwise, it can easily lead to "stressing," increasing cylinder leakage and potentially damaging the piston rod, thus increasing the machining precision and difficulty of the parts; 3. The O-ring on the guide sleeve, which provides static sealing, also enters during the guide sleeve screwing process in a helical compression manner, potentially causing the seal to twist, deform, or become damaged; 4. Torque is transmitted between the piston rod and guide sleeve via threads, which are susceptible to fatigue and seizing under prolonged and repeated impacts from high torque. Utility Model Content

[0003] In view of this, the present invention provides a spiral swing cylinder for deep-sea applications, which can solve problems such as the application of spiral swing cylinders in deep-sea environments, thread fatigue and seizing, and seal torsion, reduce the processing and assembly difficulty of hydraulic cylinders, improve production efficiency, and thus further expand the application range of double spiral swing cylinders with expansion sleeve structure.

[0004] A spiral swing cylinder for deep-sea applications includes an encoder lever, a drive shaft, an encoder mounting base, an encoder, bearings, a piston rod, a cylinder body, a piston, a guide sleeve, a shrinking coupling sleeve, and a watertight joint.

[0005] The piston rod has a hollow inner hole for mounting the encoder, drive shaft and watertight joint;

[0006] After the piston rod, piston, and guide sleeve are fitted with the sealing element, the piston rod is installed into the cylinder body and cooperates with the piston and guide sleeve. The piston rod, guide sleeve, and cylinder body are connected together by the expansion coupling sleeve. A bearing is installed between the axial mating surfaces of the piston rod, guide sleeve, and cylinder body.

[0007] The encoder mounting base is located in the inner hole at the left end of the piston rod. The encoder sealing end cover passes through the drive shaft and is mounted on the end face of the inner hole at the left end of the piston rod. The two ends of the encoder lever are respectively connected to the lever block on the cylinder and the drive shaft. The encoder cable is led out and connected to the cable in the watertight connector in the inner hole at the right end of the piston rod.

[0008] Furthermore, an expansion sleeve sealing cap is installed on the outside of the expansion joint sleeve.

[0009] Further, three continuous right-angle stepped holes are formed on the end face of the guide sleeve, and the guide sleeve is fitted into the cylinder body to form an installation cavity of the expansion coupling sleeve and the expansion sleeve sealing cover, the first and second right-angle stepped holes are used for installing the expansion coupling sleeve, and the rear half of the second right-angle stepped hole and the third right-angle stepped hole are used for installing the expansion sleeve sealing cover.

[0010] Further, the transmission shaft is rotated relative to the encoder by rotating the encoder rod when the cylinder body rotates, so that the encoder obtains a rotation angle signal, and then the signal is output from the water-tight joint at the tail of the piston rod through the cable connected with the encoder, and then the central processing unit performs logical operation according to the collected values to obtain the angle value in real time and controls the rotation angle through the output flow.

[0011] Further, there is a rotary seal between the transmission shaft and the encoder sealing end cover, and there is an O-shaped ring between the encoder sealing end cover and the piston rod for sealing; the water-tight joint and the piston rod are sealed by O-shaped rings in the end face and radial direction; so that the sealing structure of the encoder can meet the requirements of deep sea application, and the water-tight joint also plays a role in preventing the expansion coupling sleeve from loosening.

[0012] Beneficial effects:

[0013] 1. The utility model simplifies assembly, and the guide sleeve can be directly pressed in without rotation, so that there is no rotation action in the sealing element installation process, the sealing element will not be twisted and deformed to generate resistance, pre-tightening is not needed, and installation is simple. In addition, when the double helical oscillating cylinder outputs axial force and torque, the maximum value is not more than 50% of the rated value of the selected expansion coupling sleeve, so that the expansion sleeve overload slip is effectively ensured, the reliability of the connection is improved, the operating condition of the double helical oscillating cylinder is improved, and the maintenance period and service life of the double helical oscillating cylinder are prolonged.

[0014] 2. The utility model discloses a hollow structure of the piston rod, and an angle sensor, a transmission shaft and a water-tight joint are installed in the piston rod, the angle signal is collected by the built-in angle sensor, and the rotation angle of the oscillating cylinder can be accurately controlled.

[0015] 3. The utility model has good deep sea environmental adaptability, high control precision, low processing difficulty, small damage to the sealing element, good neutrality, convenient assembly, short processing period, high production efficiency and long service life. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a structure diagram of the helical oscillating cylinder applied to the utility model in deep sea.

[0017] Wherein, 1-encoder dial lever, 2-driving shaft, 3-encoder sealing end cover, 4-encoder mounting seat, 5-encoder, 6-bearing, 7-piston rod, 8-cylinder body, 9-piston, 10-guide sleeve, 11-tight coupling sleeve, 12-tight sleeve sealing cover, 13-water-tight joint. DETAILED DESCRIPTION

[0018] The utility model is described in detail below with examples and drawings.

[0019] The utility model provides a spiral swing cylinder for deep sea, and the swing cylinder is composed of an encoder dial lever 1, a driving shaft 2, an encoder sealing end cover 3, an encoder mounting seat 4, an encoder 5, a bearing 6, a piston rod 7, a cylinder body 8, a piston 9, a guide sleeve 10, a tight coupling sleeve 11, a tight sleeve sealing cover 12, a water-tight joint 13 and a sealing element.

[0020] The piston rod 7 has a hollow inner hole for mounting the encoder 5, the driving shaft 2 and the water-tight joint 13. In addition, three consecutive right-angle stepped holes are machined on the end face of one side of the guide sleeve 10. After the guide sleeve 10 is fitted into the cylinder body 8 and cooperates with the piston rod 7, an installation cavity of the tight coupling sleeve 11 and the tight sleeve sealing cover 12 is formed. The first-stage and second-stage right-angle stepped holes are used for mounting the tight coupling sleeve 11, and the rear half of the second-stage right-angle stepped hole and the third-stage right-angle stepped hole are used for mounting the tight sleeve sealing cover 12.

[0021] After the two cavities of the spiral swing cylinder are respectively input with hydraulic oil, the guide sleeve 10 and the piston rod 7 can synchronously swing relative to the cylinder body 8 to output a rotation angle and a rotation torque.

[0022] The assembly process of the spiral swing cylinder is as follows: first, the piston rod 7, the piston 9 and the guide sleeve 10 are assembled with sealing elements to complete the assembly of the swing cylinder, the cylinder body 8 and the piston 9 and the piston 9 and the piston rod 7 are connected by using a trapezoidal thread that cannot be self-locked to transmit a torque.

[0023] The assembly process of the rotation signal acquisition system is as follows: firstly, the transmission shaft 2, the encoder mounting seat 4 and the encoder 5 are connected together to complete the sub-assembly, secondly, the encoder mounting seat 4 is installed into the left end hole of the piston rod 7, then the encoder sealing end cover 3 is installed on the end face of the left end hole of the piston rod 7 through the transmission shaft 2, then the encoder lever 1 is connected with the transmission shaft 2 through the poking block on the cylinder body 8, then the cable of the encoder 5 is connected with the cable in the water-tight joint 13, then the excess cable is put into the inner hole of the piston rod 7, finally, the water-tight joint 13 is assembled with the sealing element, and then the water-tight joint 13 is fixed on the right end face of the piston rod 7 by bolts. When the cylinder body 8 rotates, the poking block drives the encoder lever 1 to rotate the transmission shaft 2 relative to the encoder 5, so that the encoder 5 obtains the rotation signal. Then the signal is output from the water-tight joint 13 at the tail of the piston rod 7 through the cable connected with the encoder 5.

[0024] In the above installation process, the guide sleeve 10 and the cylinder body 8 are connected and fastened through the expansion coupling sleeve 11, so that the rotation cooperation of the guide sleeve and the threaded gland is avoided when the threaded gland is fastened by threads, the assembly process is simplified, the guide sleeve can be directly pressed in without rotation, so that the sealing element is not twisted and deformed to generate resistance during the installation process, and the installation is simple and convenient. Secondly, the rotation signal can be collected by the encoder, so that the rotation angle of the double helix swing cylinder applied to the deep sea can be accurately controlled. Thirdly, the sealing structure for external seawater and internal hydraulic oil is provided, so that the double helix swing cylinder can meet the deep sea application environment. Finally, due to the above effects, the utility model has good deep sea environment adaptability, high control precision, low processing difficulty, small damage to the sealing element, good neutrality, convenient assembly, short processing cycle, high production efficiency and long service life, and the like.

[0025] In conclusion, the above is only a preferred embodiment of the utility model, and is not used to limit the protection scope of the utility model. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A helical oscillation cylinder applied to a deep sea, characterized by, Encoder lever, transmission shaft, encoder mounting seat, encoder, bearing, piston rod, cylinder, piston, guide sleeve, expansion coupling and water-tight joint are included. The piston rod has a hollow inner hole for mounting the encoder, transmission shaft and water-tight joint. The piston rod, piston and guide sleeve are sealed, the piston rod is fitted into the cylinder and cooperates with the piston and guide sleeve, the piston rod, guide sleeve and cylinder are connected together through the expansion coupling, and a bearing is arranged between the axial cooperation surface of the piston rod and guide sleeve and the cylinder. The encoder mounting seat is arranged in the inner hole of the left end of the piston rod, the sealed end cover of the encoder is arranged in the end face of the inner hole of the left end of the piston rod through the transmission shaft, the two ends of the encoder lever are connected with the lever block on the cylinder and the transmission shaft respectively, and the cable of the encoder is connected with the cable in the water-tight joint at the right end of the piston rod.

2. The helical oscillation cylinder for deep sea application as claimed in claim 1 wherein, The expansion coupling is externally provided with an expansion sleeve sealing cover.

3. A helical oscillation cylinder for use in deep water as claimed in claim 2, wherein, Three continuous right-angle stepped holes are processed on the end face of one side of the guide sleeve, the guide sleeve is fitted into the cylinder and cooperates with the piston rod to form an installation cavity of the expansion coupling and expansion sleeve sealing cover, the first and second right-angle stepped holes are used for mounting the expansion coupling, the rear half of the second right-angle stepped hole and the third right-angle stepped hole are used for mounting the expansion sleeve sealing cover.

4. A helical oscillation cylinder for use in deep water as claimed in claim 3, wherein, The cylinder drives the encoder lever to rotate the transmission shaft relative to the encoder when the cylinder rotates, so that the encoder obtains a rotation angle signal, then the signal is output through the cable connected with the encoder and the water-tight joint at the tail of the piston rod, then the central processing unit performs logical operation according to the collected values to obtain the angle value in real time and controls the rotation angle through the output flow.

5. A helical oscillation cylinder for use in deep water as claimed in claim 3 or 4 wherein, There is a rotary seal between the transmission shaft and the sealed end cover of the encoder, and an O-shaped ring is arranged between the sealed end cover of the encoder and the piston rod for sealing; the water-tight joint is sealed by O-shaped rings in the end face and radial direction between the piston rod.

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