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Electric forklift is prone to failure when shifting The variable speed system is available according to the drivers intention(Throttle opening)And the driving condition of the forklift(Engine speed、Turbine speed、Speed and gear)，With the appropriate executive agencies(Throttle actuator、Locking actuator and shift selector actuator)Operate automatically。Throttle position sensor、Pump wheel turbine speed sensor、Signals such as the speed sensor and gear selector are sent to the electronic control unitECUafter，ECUThe on and off of each solenoid valve is controlled according to the stored shift signal，consequently
polythene——PE polypropylene——PP polybutene——PB Polyvinyl chloride——PVC Heat resistant polyvinyl——PE-RT Hard polyvinyl chloride（Reinforced polyvinyl chloride）——PVC-U（UPVC） High density polyethylene——HDPE Random copolymer polypropylene——PP-R Glass fiber reinforced polypropylene——FRPP Low density polyethylene——LDPE Polymethyl methacrylate——PMMA Polytetrafluoroethylene——PTFE（F4） Epdm rubber——EPDM Porous polystyrene——XPS Nitrile group
1.Precision plastic bearing[bearing:bearing（“Bearing”，Japanese person“Axial receptor”）It is a part that holds and reduces the friction coefficient of load during mechanical transmission。Can also be said，When other parts move relative to each other on the shaft，A device used to reduce the coefficient of friction during power transmission and to keep the center of the shaft fixed。] Precision plastic bearing，Compared with traditional plastic bearings, the precision and tolerance are improved。The inner and outer rings are made of materials suitable for precision machining， Rolling element and cage，On the basis of maintaining the traditional advantages of plastic bearings，Can be used in precision and high speed
1. High and low grade CNC equipment collocation Because the price of CNC equipment is relatively expensive，Enterprises can according to their actual situation，In the early application of CNC machining technology，Choose to transform the numerical control equipment for technical application investment，After obtaining certain application experience。Then according to the processing characteristics of the product，As material、type、precision、batch、Cycle requirement，Suitable high - grade CNC equipment。 2. Acceptance of equipment The compensation accuracy of many CNC machine tools has a large error in the case of high-speed machining，Or the Lord.
The wheel bearings of the car[bearing:bearing（“Bearing”，Japanese person“Axial receptor”）It is a part that holds and reduces the friction coefficient of load during mechanical transmission。Can also be said，When other parts move relative to each other on the shaft，A device used to reduce the coefficient of friction during power transmission and to keep the center of the shaft fixed。]Make noise，This seemingly impossible glitch actually exists，Lets discuss it together。 Fault phenomenon：When one of the four wheel bearings of the vehicle is damaged，The car is moving and you hear a constant hum inside the car
451 GB/T 5282-1985 Slotted pan head tapping screw Slotted pan head tapping screws 452 GB/T 5283-1985 Slotted countersunk head tapping screw Slotted countersunk head tapping screws 453 GB/T 5284-1985 Slotted semi-countersunk head tapping screw Slotted raised countersunk head tapp
（1）Axial clearance Axial adjustment is to achieve a certain bearing[bearing:bearing（“Bearing”，Japanese person“Axial receptor”）It is a part that holds and reduces the friction coefficient of load during mechanical transmission。Can also be said，When other parts move relative to each other on the shaft，A device used to reduce the coefficient of friction during power transmission and to keep the center of the shaft fixed。]Clearance or preload capacity，Tapered roller bearings can be adjusted to maximize their performance when assembled。Such asT1MKENThe relationship curve between bearing fatigue life and axial clearance provided by the company（See picture1），Tapered roller shaft
Look at the size of the volume of the oil tin Low cost oil products，Careful observation will find that the volume is smaller than the normal oil tin，The size and the distance between the slices are smaller than that of normal oil，They belong to the small oil Ting，Compared with normal oil tin，The quality is self-evident。The volume of Jia Xing Oil Ting is5.2l，Hotter than small oil ting26％。 Two look at the internal connection of the oil ting At present, there are plastic wires inside the oil tin on the market、Silicone rubber wire and aviation wire three kinds。Plastic wire worst，Not resistant to high temperature and easy to age，Easy short circuit poses danger，Preferably an aerial wire。Shanghai Jiaxing electric heating
On the one hand depends on its quality，The other part depends on the stretching conditions （one）The effect of reduction rate During the stretching process，；The drawing die exerts pressure on the wire，When the metal wire deforms, a counterpressure is generated on the wall of the drawing die。The greater the reduction rate used in stretching，The more pressure the hole wall exerts on the wire，The reaction force generated by the metal wire on the hole wall is also enhanced，This force is greater than the tensile capacity of the mold itself，Then the die will crack。 （two）Lubricant effect During the stretching process，The quality of lubricant and sufficient supply of lubricant affect the service life of wire drawing die
What is the difference between different electric forklifts 1、Power use；The commonly used power supply is power frequency transformer（Iron core，50Hz）The linear power supply and the use of high-frequency transformers（Magnetic core，Thousands ofHz）The switching power supply two categories。 The principle of switching power supply is：Put the power frequency first（50Hz）The alternating current is converted to high frequency current，Then through the high-frequency transformer into low voltage after the rectifier output low voltage DC。Because the volume of the high-frequency transformer with the same power is much smaller than the power frequency----The higher the frequency，Smaller size，So you can do a lot of power、Small size、Light weight，Thus be
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