zyu5997的部落格

The   Eaton Char-lynn Motor    states that a high-speed motor is one that achieves maximum power and maximum torque peaks at relatively high motor speeds. Generally speaking, the maximum output power is above 5000 rpm and the maximum torque is above 3,500 rpm. Our common models include Palio, Old Fukang 1.6, Elysee VTS, Hyundai Sonata and cars equipped with 8A motors (or 8A motors) (including Xiali, Geely pride, US and Japan, Freedom Ship, Huapu Sea 205, etc.), etc. . The maximum torque of this motor is above 3,500. The performance of the car equipped with this motor is: when the motor is low, the torque is insufficient, the car accelerates slowly, and when the motor is at high speed, the torque reaches the peak. At this time, the car power is strong and strong. If the car equipped with this motor wants to call him to accelerate at low speed, it must be realized by increasing the motor speed by instantly increasing the throttle. For example, the Elysee 16V, his motor is currently one of the most popular motors in Europe and America, its 100 km acceleration is 11.3 seconds, and now it is 10.8 seconds, the indicator is the first in China's 1.6 or 1.8 liters. If you follow the general driving method, its 100-kilometer acceleration is about 15 seconds, but if you increase the throttle quickly by increasing the throttle, the effect is completely opposite. In addition, from the external characteristic curve of the high-speed motor, when the motor speed reaches a high speed near its maximum torque peak, the fuel consumption begins to decrease.

Gear pumps are external or internal depending on their design and operation.    Parker Gear Pump    describes the movement characteristics of external gear pump and internal gear pump

In which areas of gear pump design is applied, what is the application significance, the    Gear Pump Manufacturers    answers:

The gear pump is designed for cleaning liquids. Make sure they draw liquid from the top of the supply tank in the clean liquid space. It can pump low viscosity and high viscosity liquids. If pumping sensitive food grade products (ie pump agitation to destroy cells and fibers) is to be pumped, it is necessary to increase the size and speed of the pump.

Adhesive coating technology refers to the application of adhesives to the surface of parts to achieve wear resistance, corrosion resistance, recovery of geometric dimensions, repair of various applications such as pulling (scratching) damage.

Adhesive is a polymer made of metal, ceramics, etc., which can resist damage such as erosion, cavitation, friction, chemical attack, etc. At the same time, it can be firmly bonded to the surface of the part to form a hard wear-resistant and resistant Corroded composite coating.

Gear pumps are the backbone of the petrochemical industry. They are used in crude oil, diesel, lubricating oil, asphalt and asphalt. They are also used to transport chemicals such as sodium silicate, mixed chemicals, acids, plastics, isocyanates and other chemicals that must be handled with care.

They are also used in adhesives, resins, inks and coatings. They are particularly popular in the pulp and paper industry for use in acids, lye, soap, black liquor, emulsions, kaolin, lime and sludge.

Vane pumps, also known as rotating blades or sliding vane pumps, operate on a positive displacement principle. A positive displacement pump moves the fluid essentially by capturing a fixed volume and forcing the trapped fluid into the discharge tube.

As the name suggests, the rectangular vane of the vane pump is mounted in a groove in the rotor that rotates inside the asymmetric pump casing. As the rotor rotates, the asymmetrical shape of the housing causes the blades to move into and out of the slot to contact the housing wall and capture fluid between the housing and the rotor. The mechanism pulls the fluid out until it is discharged from the discharge port.

The   Piston Pump Manufacturers   explained that the piston pump is suitable for high pressure applications. These pumps are highly efficient and simple in design and require low maintenance. These pumps convert the rotational motion of the input shaft into a reciprocating motion of the piston. These pumps work like a four-stroke engine. They operate on the principle that when the piston is retracted in the cylinder bore, the reciprocating piston draws fluid into the cylinder and expels the fluid as it expands. Typically, these pumps have a fixed sloping plate or a variable angle plate called a swash plate (as shown in Figure 5.3.5 and Figure 5.3.6). When the cylinder barrel assembly rotates, the swash plate that contacts the piston slipper slides along its surface. The stroke length (axial displacement) depends on the angle of inclination of the swash plate. When the swash plate is vertical, no reciprocating motion occurs, so fluid pumping does not occur. As the angle of the swash plate increases, the piston reciprocates within the cylinder. The stroke length increases as the angle of the swash plate increases, so the volume of the pumped fluid increases. During one half of the rotation cycle, the piston moves out of the cylinder and the volume of the barrel increases. During the other half of the rotation, the piston moves into the cylinder and the barrel volume decreases. This phenomenon is the reason why the fluid is sucked in and taken out. These pumps are positive displacement pumps for liquids and gases.

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The   Electric Motor Manufacturer    stated that the motor is a high-energy-consuming power device with a large application range and a wide range of applications. According to statistics, China's motor power consumption accounts for 60% to 70% of the total industrial electricity consumption. In practical application, the overall operating condition of China's electric motor is quite different from that of foreign countries. The unit efficiency is about 75%, which is about 10% lower than that of foreign countries. The system operating efficiency is 30-40%, which is 20-30% lower than the international advanced level. . Therefore, China's motor application has great potential for energy saving, and it is imperative to promote motor energy conservation.

The shaft is one of the important parts in the motor. Since most of the damage has fatigue properties, the requirements for general motor shaft materials are: high enough strength, low sensitivity to stress concentration and good processing performance. Except for the unimportant and less stressed shaft, Q235A, Q255A or Q275 ordinary carbon steel is generally made of 45 quality carbon steel, and then re-tempered if necessary. Today,     Electric Motor Manufacturer    talk to you about the most basic requirements of the shaft. The shaft that seems to be relatively simple has a lot of knowledge.

According to the    Electric Motor Manufacturer   , the Hall of the motor is a semiconductor sensor. Under the action of Lorentz force, the electron flow is shifted to one side when passing through the Hall semiconductor, so that the potential difference is generated on the side of the sheet. This is called Hall voltage. The Hall voltage changes with the change of the magnetic field strength. The stronger the magnetic field, the higher the voltage, the weaker the magnetic field, the lower the voltage, the smaller the Hall voltage, usually only a few millivolts, but amplified by the amplifier in the integrated circuit. This voltage can be amplified enough to output a stronger signal. In the motor, a rotating magnetic steel is used as a switch for controlling the magnetic flux. When the magnetic steel is close to the Hall integrated circuit, the Hall voltage is large (on), the magnetic field deviates from the integrated piece, and the Hall voltage disappears (off). In this way, the change of the output voltage of the Hall integrated circuit can indicate that the shaft is at a certain position, and the working principle can be used to control the rotation of the motor.

Why does the gear pump have a poor pressure response?    Gear Pump Manufacturers     analyze the reasons:

The     Vickers Vane Pump    states that the double-acting vane pump is also composed of a stator, a rotor, a vane and an oil distribution disc. The center of the rotor and the stator coincide, and the inner surface of the stator is approximately elliptical, which consists of two long radius r, two short radius r and four transition curves. When the rotor rotates, the blade moves radially into the inner surface of the stator under the action of the centrifugal force and the root pressure oil, and is formed by the inner surface of the blade, the stator, the outer surface of the rotor, and the oil distribution plates on both sides. A number of sealed spaces, when the rotor rotates in the direction shown, the sealing space on the small arc moves through the transition curve ^ into the process of the large arc, and the blade extends. The tolerance of the sealed space increases. Vacuum, it is necessary to suck the oil; in the process of moving from the large arc transition curve to the small arc, the blade is gradually pressed into the groove by the inner wall of the stator, the volume of the sealed space becomes smaller, the oil is squeezed, and the oil is pressed from the oil. The mouth is pressed out.

The    Danfoss Motor    states: the ratio of the maximum volume of gas in the cylinder before compression to the minimum volume after compression, the national standard is expressed in ε, which is also equal to the ratio of the total cylinder volume to the combustion chamber volume. When the gasoline motor is running, it is a mixture of gasoline and air. The higher the compression ratio, the higher the pressure and temperature of the compressed mixture. The gasoline molecules in the mixture can be more completely vaporized and burned. It is faster and more complete, so the greater the power generated by the motor, the better the economy, and the improved exhaust quality. Conversely, a low compression ratio motor burns time is relatively extended, increasing energy consumption and reducing power output.

A naturally aspirated motor is a type of intake air for a car motor that is a form of atmospheric pressure that presses air into the combustion chamber without passing through any supercharger.

The servo motor is an engine that controls the operation of the mechanical components in the servo system, and is an auxiliary motor indirect transmission.

The high-viscosity NYP gear pump has a strong self-priming performance and is a volumetric internal rotor pump. It is widely used in chemical petroleum, pigment, food, soap, detergent and pharmaceutical industries because of its small size, light weight and pulsation. Small, low-pitched, and stable operation.

What should you watch out for when using a variable vane pump?    Vane Pump Manufacturers    instructions

1. In order to make the vane pump reliably absorb oil, its rotation speed must be in the range of 500-1500r/min. When the rotation speed is too low, the blade can not press the inner surface of the stator and suck the oil; if the rotation speed is too high, the pump will “suck” The pump is not working properly. The viscosity of the oil should be properly selected, the viscosity is too large, and the oil absorption resistance is increased; the oil is too thin, the gap is affected, and the vacuum is insufficient, which may adversely affect the oil absorption.

The variable vane pump is a commonly used hydraulic oil pump with the advantages of low noise, high work efficiency and relatively low cost. The heat-dissipating variable vane pump is a typical variable vane pump, which has more advantages than the ordinary vane pump, and has good heat dissipation. The use of the high-temperature environment is more conducive to reducing the heat in the variable vane pump, and the variable vane pump and the motor are not protected. The high temperature is burned out.

Danfoss Motor    Answer: How to repair the common faults of the motor governor?

Kcb gear pumps are widely used in various production areas as a common hydraulic tool. The annual maintenance cost of the kcb gear pump accounts for a large share of the operating costs. This is often caused by the fact that the pump is not checked, resulting in many neglected glitch becoming a major failure and missing the opportunity to repair. This shows the importance of the daily inspection of the gear pump.

The daily inspection contents are as shown in the table. For some kcb gear pumps, it can be appropriately selected according to the instruction manual.