1. Piston hydraulic cylinder consists of two piston hydraulic cylinders to form a combined hydraulic cylinder: one piston cylinder has a piston rod that is another piston cylinder cylinder.
Features: 1) reliable operation, stable performance, simple structure, can realize the combination of multiple pressure chambers; 2) easy to achieve speed control, especially to meet the various speed requirements of the large hooks of drilling rigs and workover rigs. Scope of application: Combined hydraulic cylinders for large hydraulic equipment such as hydraulic energy storage oil drilling rigs and hydraulic energy storage oil workover rigs. Experience: Provide a combination hydraulic cylinder for processing, maintenance and control of large hydraulic equipment such as hydraulic energy storage oil rigs and hydraulic energy storage oil workover rigs. Disadvantages: It does not have the functions of large hydraulic cylinders, long strokes and other hydraulic cylinders. Suitable for small power, short stroke and other power and motion needs.
2. Principle and composition of cylinder combined hydraulic cylinder: The combination of multi-section cylinder and cylinder is a conical surface meshing and positioning connection; the fasteners for coupling are hydraulic nut fastening technology; the piston seal structure adopts two-stage alternating Sealing technology.
Application advantages: 1) The length of the integrated cylinder of at least two cylinders is several times the length of the conventional single cylinder, as long as the length that can be achieved by the piston rod can be matched with it, so as to achieve the long stroke action and constant output of the hydraulic cylinder. Ideal value of force; 2) Easy to install, adjust, disassemble and overhaul, especially in the installation of equipment, difficult to disassemble or special work place; 3) can directly reduce the cost of use, the inevitable meeting of hydraulic cylinders at work In the case of damage or wear of the inner hole, this type of structure can repair or update only a certain segment of the cylinder without replacing the full-length cylinder. Disadvantages: It does not have the functions of large hydraulic cylinders, long strokes and other hydraulic cylinders. Suitable for small power, short stroke and other power and motion needs.
Residential Sectional Garage Door
A typical version of an overhead garage door used in the past would have been built as a one-piece panel.The panel was mounted on each side with unequal parallelogram style hinge lifting mechanism. Newer versions of overhead garage doors are now generally built from several panels hinged together that roll along a system of tracks guided by rollers. The door is balanced by either a torsion spring system or a pair of extension springs.A remote controlled motorized mechanism for opening garage doors adds convenience, safety, and security
• Aluminum garage doors are low-cost, light, rust-proof, and feature low-maintenance. They are prone to denting because aluminum is not strong and they are energy-inefficient since aluminum is a highly conductivematerial.
• Fiberglass and vinyl garage doors are composite units, combining a steel core behind a fiberglass or vinyl skin. They have also polyurethane insulated base sections, or other type of foam insulation. These premium doors can match steel garage doors, and be a realistic imitation of wood (namely fiberglass units), but they may be more expensive than steel units.
• Steel doors have become common and are available in a variety of sizes and styles, provide strength and security, are cost-competitive, and may have optional insulating value. Extra strength is available with two or three layers of galvanized steel with a low gauge number (23-24 gauge steel panels).
• Wood garage doors offer aesthetic appeal, but they are high-maintenance and may be expensive. Low-priced wood garage doors may warp and break easily.
Residential Sectional Garage Door,Automatic Metal Sectional Garage Door,Standard Lift Garage Door Drum,Polyurethane Foam Garage Door
Shenzhen Hongfa Automatic Door Co., Ltd. , https://www.hffastdoor.com