Was established in 1998, is a collection of r & dproduction, trade as one of the high-tech company, the company specializes in manufacturing various micro-motor shaft...
Was established in 1998, is a collection of r &d production, trade as one of the high-tech company, the company specializes in manufacturing various micro-motor shaft...
Our machine including large CNC lathe, CNC machining center, CNC centerless grinding machine, CNC Incisive grinding machine, CNC cylindrical grinding machine, heat treatment machine.
The basic concept of the pump
A water pump is a machine that delivers or pressurizes a liquid. It transfers the mechanical energy of the prime mover or other external energy to the liquid, which increases the liquid energy. It is mainly used to transport liquids including water, oil, acid and alkali liquids, emulsions, suspoemulsions, and liquid metals, as well as liquids and gas mixtures. And liquids containing suspended solids. The technical parameters for measuring the performance of the pump include flow,turning parts suction, lift, shaft power, water power, and efficiency.
Pumps can be divided into three types according to the working principle of positive displacement pump, power type pump and other types of pumps. In addition to classification by working principle, it can be classified and named by other methods.
For example, according to the driving method can be divided into electric pumps and water wheel pumps; according to the structure can be divided into single-stage pumps and multi-stage pumps; according to the use can be divided into boiler feed pumps and metering pumps; according to the nature of the liquid can be divided into Water pump, oil pump and mud pump. The water pump is an indispensable mechanical equipment in the water conservancy project. In operation, it will inevitably lead to failure and damage, so that the water can not be delivered normally. Therefore, the poor water pump must be repaired and adjusted to eliminate the trouble in time.
How the pump works
The working principle of the water pump: The water pump can send the water out because of the centrifugal force. Before the pump works, the pump body and the inlet pipe must be filled with water to form a vacuum state. When the impeller rotates, the blade causes the water to rotate quickly, stainless steel shaft and the rotating water flies from the impeller under the action of the centrifugal force. The water in the pump After being thrown out, the center part of the impeller forms a vacuum area.
The water of Suwon was pressed into the inlet pipe through the pipe network under the effect of atmospheric pressure (or water pressure). With this endless cycle, continuous pumping can be achieved. What is worth mentioning here is: Before the pump starts, it must be filled with water in the pump casing before it starts. Otherwise, it will cause the pump body to generate heat, vibration, and reduce the amount of water, causing damage to the pump (referred to as "cavitation") Equipment accident.
Advantages and Disadvantages of Floating and Ball Bearings in Turbocharger
I believe that most people mention the structure of the turbocharger, the first reaction will be a turbine or a compressor, and will always think that the turbine and compressor is the core technology of the manufacturers. It seems that we have also missed an "unremarkable" part.turbocharger shaft Yes, it is the turbo shaft. With a maximum speed of more than 150,000 rpm, it has deep processing technology, superb mold processing level, high temperature resistance and ultra-abrasive material selection. The entire material manufacturing use process requires such strict turboshafts as each turbine increases. The most important part of the pressure generator manufacturers. It is the protagonist of this article that the turbine bearing that supports the turbine shaft.
The bearing structure of the turbocharger is related to the reliability and durability of the turbine. Turbocharger bearings are mainly divided into two categories, one is a floating bearing (commonly known as Bosch bearings), and the other is a ball bearing. Most modern automotive turbocharger bearings use floating bearings, without him, and durable, affordable ears. The floating bearing is actually a ring which is sleeved on the shaft. There is a gap between the ring and the shaft and the ring and the bearing seat to form a double oil film. The ring floats between the shaft and the bearing housing. Generally, the inner gap is about 0.05 mm, and the outer gap is about 0.1 mm. The bearing wall thickness is about 3.0-4.5mm, and it is made of tin-lead bronze alloy. The bearing surface is coated with a layer of lead-tin alloy or metallic indium with a thickness of 0.005-0.008mm. When the supercharger operates, the bearing rotates between the shaft and the bearing housing. Therefore, we can find the disadvantages of floating bearings: the high rotation resistance of the turbine shaft is large, the oil pressure and quality requirements are high, and the dynamic control of the turbine shaft is not stable.
Ball bearings are more visible in performance models. As the name implies, ball bearings are mounted on the turbine shaft to replace the oil in the floating bearings. The advantage of a ball bearing is exactly the opposite of a floating bearing: the friction is smaller,stainless steel shaft the effect of turbo lag is lower, and the pressing of the power limit is more favorable; the dynamics of the turbine shaft can be effectively controlled; the oil pressure and quality can be slightly reduced Indirectly increased the life of the turbine. The shortcomings are also obvious, that is, life is less than floating bearings, generally 70,000 to 80,000 kilometers to the limit of life, and maintenance costs expensive, difficult to maintain. However, since ball bearings are extremely attractive in terms of lifting power, ball bearings are still the mainstream equipment for performance models.
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