机械-Machinery industry

  Remove the wheel Loosen the lug nuts on the wheel. Then jack up the car and place a jack stand under the car's frame. Lower the floor jack so its weight rests on the jack stand. Fully remove the lug nuts and remove the wheel. You now have access to the brake assembly and can safely reach under the car.   Remove the slider bolt Find the two slider bolts (sometimes called "pins") that hold the caliper in place. On this car, a 2009 Ford Flex, the bolts are on the inside. The arrows in the photograph above point them out. It's generally only necessary to remove the lower bolt. It can be long but once it is fully loosened, it will slide out easily.   Pivot the brake caliper up With the bottom bolt removed, the brake caliper pivots up, as shown in the photograph above. The rubber hose, which is the hydraulic line, will flex to allow this so do not disconnect any hydraulic brake lines. If you think you have to disconnect a brake line, you're doing something wrong. Reas...

For   non-destructive testing   (NDT), the industry is increasingly using phased-array ultrasonic testing (PAUT). It has replaced other traditional ultrasonic and radiographic NDT methods with its high defect detection and accurate measurement capabilities. For industries such as aerospace, power generation, and pipeline services, phased-array ultrasonic inspection offers many advantages.   Advantages of phased-array ultrasonic inspection PAUT offers a number of advantages over other NDT methods, including   1. Increased inspection speed Phased array probes use multiple transducers, which helps to inspect larger surfaces in a short period of time. Multiple inspections can be performed using a single probe, saving time spent on setup reconfiguration and changing probes for each unique test.   Using a phased array system, digital feedback can be received instantly. This helps to identify defects faster and understand weld quality.   Multi-function Phased Arra...

    Expanded Polystyrene foam, also known as EPS is a highly durable material that is used in a wide variety of consumer products. It can be found nearly everywhere, in you local food store (plates, cups, food containers etc) and the local electronics stores (insulation for refrigerators, coolers etc), plastic utensils are made of Styrene, CD cases and cloth hangers are all made of Styrene. It is also an excellent insulation material. EPS foam starts at very small beads, also known as granules, similar to sand in texture. In order to make an EPS foam block out of these raw small beads, they need to be "blown" into larger beads, about 50 times its original size. This is called the pre-expansion process. Depending on the density required, the beads are blown using steam in a machine called expander or steamer. The expander can be a simple manual machine that a worker places the raw material in, then turns on the steam. Or, it can be an automatic machine where the material is bl...

  Excavators are one of the most popular and effective pieces of equipment used to move large amounts of dirt for construction projects and other similar projects. If you have a job coming up that requires dirt removal and you need an estimate of how long it will take, you may be wondering, "How much can an excavator dig in a day?"   An excavator can be used to dig anywhere from 350 to 1,000 cubic yards per day, depending on a number of factors, including  bucket capacity , ground type, operator skill, and efficiency level.   To help you better plan which type of excavator you need and how long it will take to complete an upcoming project, we have provided some resources below.    Excavator The main factors affecting digging speed and efficiency One of the biggest factors affecting how much an excavator can dig in a day is the bucket size of the machine, which usually ranges from 0.5 to 1.5 cubic yards of bucket capacity. The most common conventional size e...

  The water well drilling rig is a new, high-efficiency, energy-saving and multifunctional hydraulic drilling rig, mainly used for drilling water wells, monitoring wells, geothermal air conditioning holes, well washing projects, etc. This article introduces the composition of the water well drilling rig and precautions for use.   Commonly used drilling tools of water well drilling rigs and their usage ◆The drilling tools commonly used in  water well drilling rigs  are square drill pipes, drill rods, drill jacks, joints, stabilizers, shock absorbers, and tools used under specific conditions, such as salvage tools, coring tools, etc.   ◆In rotary drilling, the square drill pipe is connected to the tap on top and the drill pipe in the well on the bottom. Through the complementary center, the rotational motion of the turntable is transferred to the square drill pipe to drive the drilling tool to rotate. The square drill pipe is located at the upper end of the drill ...

Different grades of  brake pads  are available from varying suppliers, and the comparison is often OEM vs aftermarket brake pads. Which is the right choice for your vehicle, though, and what are the tradeoffs between the different types of brake pads? Brake Pad WHAT ARE OEM BRAKE PADS? The acronym OEM stands for Original Equipment Manufacturer, and it refers to parts that are made by your car’s manufacturer and are precisely the same as the ones it was equipped with off the factory assembly line. They’re often supplied to the OEM from another parts manufacturer, though, according to the specs your carmaker indicates.  For  OEM brake pads , certain qualities are quite common, and they’re almost all focused on the initial experience when you buy a car. The carmaker wants you to enjoy driving – including stopping – your car, with as little to complain about as possible. For most applications, they’re made of either ceramic or organic compounds to achieve these...

The function of a condenser is to allow high-pressure and high-temperature refrigerant vapor to condense and expel heat. There are three main types of condensers: air-cooled, evaporative, and water-cooled condensers. Manufactured from imported parts, our  Two-Stage Air Cooled Piston Condensing Unit  ensures maximum output and acquires less space to meet the latest standards. Air-cooled condensers Air-cooled condensers usually consist of tubes with fins, but occasionally there are wires or even plates fixed to the refrigerant tubes. These give the condenser a larger surface area and allow for more efficient cooling. Air circulation is achieved by static means, where the air in contact with the ducts becomes hot and rises to be replaced by cooler air. Or, more typically, there is forced convection, where a fan moves air through the condenser. Condenser fins need to be kept clean to maximize heat transfer and cooling to the refrigerant. Having Bitzer's two-stage semi-hermetic com...

Heating systems, home designs, and other appliances and technologies have evolved over the years as our changing needs and lifestyles have evolved. Several iterations of   gas burners   have replaced older technologies, all in favor of safer, more efficient gas heating. Industrial natural gas burners  Technology As gas-fired appliance heat exchangers became more compact in design to improve efficiency, engineers were tasked with building gas burners to improve how to produce the correct type of flame for the appliance heat exchanger. The first example of a major change in gas burner technology involves a change to jet burners. In the new design, many small flames are produced to distribute heat evenly throughout the application. However, as heating systems continue to evolve, so do the needs of heat exchangers. In more compact heat exchanger designs, the " waste gas " by-products are not free to move, so engineering changes are required to allow these gases to flow throug...