answersLogoWhite

0


Best Answer

== == == == Spool dynamics include fluid motion actuated by one or more tangential forces, i.e, gears, and thus achieve force as a function of mass acceleration. Mass of small gas engine flywheel spins, creating torque, applied through a coupler into a hydraulic motor, oh no, more gears, only in reverse centripital motion. Vector forve applied in the Z direction produces torque that we all view as "the thingy moves" in laymans terms. As fluid speed increases, the puport functions only as a momentary divider of said spool. Once the area gradient w is selected, the minimum value of the spool diameter is determined because ports may be at most full periphery of the spool. The fluid then spools through the value hydraulically actuating the valve. The cylinder fills with fluid and extends much like the phalic symbol of a man. A man with many spools is a man hard stopped.

Typical passage in spool valves. It is possible to obtain a design relation between if and rtm from a consideration of flow saturation and valve.

Single-stage servovalves consist of a torque motor which is directly attached to and positions a spool valve. Because torque motors have limited power ...or do they, I'll won't mention it, it may confuse you terribly.

Note that two feedback loops are involved, and these are due to spool position feedback and to pressure feedback on the flapper. Because either loop could ...

With Kvp now known and selecting a suitable value for the spool actuation area Ar, we may use (7-82) %theta to determine the required flow gain of the pilot. Once angular momentum is initiated we then take the tangental derivative to achieve output. Big output.

Neglecting the flow force on the spool, cof -*• 0, and this equa- tion reduces. These equations can now be combined to form the block diagram. Spool valve dimensions are sized to satisfy load flow and pressure requirements. The flapper valve gain is determined from (7-100), and the other flapper ...

This backlash is due to slipping of the mechanical anchorages in the torque motor, but it is mainly due to friction between spool and sleeve. ...

This may amount to 0.0001 in. or so of main spool motion. The dither amplitude should not be so large that it is transmitted to the load by the servovalve ...

A spool type servovalve ports fluid to a piston or rotary motor whose motion is Ted back through some mechanical arrangement to stroke ...

These valves usually employ spool type construction and may be actuated manually, mechanically, hydraulically, pneumatically, electrically, ...

These four equations can be combined to form the block diagram in Fig. 12-5. The loop gain function for this loop is Ads) Pilot spool dynamics (

A. where Kv = flow gain of pilot spool valve, in.3/sec/in. (12-12) o>A = hydraulic natural frequency due to trapped oil spring and swash plate mass.

User Avatar

Wiki User

15y ago
This answer is:
User Avatar

Add your answer:

Earn +20 pts
Q: How does a hydraulic spool valve work?
Write your answer...
Submit
Still have questions?
magnify glass
imp
Continue Learning about Engineering

What is a pneumatic solenoid operated spool valve?

spool valveA spool valve is a multidirectional hydraulic or pneumatic valve usually operated by a joystick. It has several hoses attached to it leading to different pneumatic rams. When the joystick is pushed in one direction, it causes the valve to shut off one of the pneumatic hoses leading to the ram and open the other. Which way the joystick is pushed moves the piston in the ram in or out. Since you specified a solenoid operated valve it is operated not by a joystick that is directly connected to the valve but rather an electric joystick like the you would use in a video game and an electrical signal is sent to activate a solenoid that does the same thing but can be much farther away from the operator. Solenoid Actuated Pneumatic Spool ValveA solenoid actuated pneumatic spool valve is a spool valve actuated by an electric solenoid. They are often used in industrial automation and are usually controlled by a PC or a PLC (Programmable Logic Controller) rather than a manual switch. To reduce the size and power consumption of the solenoid, often the solenoid does not directly actuate the spool. Instead, the solenoid actuates a small internal valve which directs upstream air pressure to move the spool. This is called an air piloted solenoid actuated pneumatic spool valve. The air pilot mechanism typically requires about 40 PSI to operate reliably. If the air pressure upstream of the valve is going to be less than 40 PSI, the valve must be externally piloted, meaning that the pilot is connected to a separate air source which is above 40 PSI.


How does solenoid hydraulic valve work?

A solenoid valve is a type of valve that uses an electrical current to actuate or shift a spool or cartridge consisting of a solenoid coil and tube assembly. Basically, this valve type uses an electric current to shift a pin to perform simple A/B tasks such as open/close valve spools. The designation "solenoid" means that the valve operation is electrical not manual. Maybe the easiest way to describe a solenoid valve is by thinking about an automatic car lock. The electric current get triggered, the pin gets pushed up and the doors are unlocked. A reverse current gets triggered, the pin gets pushed down, and the doors are locked.


How do hydraulic drills work?

with hydraulic's


What is a logic valve?

Logic valves serve as a multifunctional valve for controlling the direction, flow and pressure by controlling the pressure signals in a hydraulic system, at the same time providing protection to the hydraulic pump.


What is spool type flow divider?

A device for dividing the flow into the valve between two outlets. The spool is pressure balanced by the flow across it. When a greater pressure drop occurse at one of the ports the spool moves across to counteract this and divert more flow to one side. They are not perfectly accurate.

Related questions

What is a spool type hydraulic valve used to control?

Hydraulic actuators. Also called hydraulic rams or hydraulic cylinders.


What is a hydraulic detent valve?

A spring device which maintains the spool of a directional control valve in position.


Arms wont lift up or down on Bobcat 873?

this can be caused by a number of things * low oil level *damaged hydraulic pump *sticking or spool valve *worn valve body *damaged anticavity solenoid valve *damaged lift spool lock solenoid


How does a directional control valve work?

Directional control valves are one of the most fundamental parts in hydraulic as well and pneumatic machinery. They allow fluid flow into different paths from one or more sources. They usually consist of a spool inside a cylinder which is mechanically or electrically controlled. The movement of the spool restricts or permits the flow, thus it controls the fluid flow.


What is a pneumatic solenoid operated spool valve?

spool valveA spool valve is a multidirectional hydraulic or pneumatic valve usually operated by a joystick. It has several hoses attached to it leading to different pneumatic rams. When the joystick is pushed in one direction, it causes the valve to shut off one of the pneumatic hoses leading to the ram and open the other. Which way the joystick is pushed moves the piston in the ram in or out. Since you specified a solenoid operated valve it is operated not by a joystick that is directly connected to the valve but rather an electric joystick like the you would use in a video game and an electrical signal is sent to activate a solenoid that does the same thing but can be much farther away from the operator. Solenoid Actuated Pneumatic Spool ValveA solenoid actuated pneumatic spool valve is a spool valve actuated by an electric solenoid. They are often used in industrial automation and are usually controlled by a PC or a PLC (Programmable Logic Controller) rather than a manual switch. To reduce the size and power consumption of the solenoid, often the solenoid does not directly actuate the spool. Instead, the solenoid actuates a small internal valve which directs upstream air pressure to move the spool. This is called an air piloted solenoid actuated pneumatic spool valve. The air pilot mechanism typically requires about 40 PSI to operate reliably. If the air pressure upstream of the valve is going to be less than 40 PSI, the valve must be externally piloted, meaning that the pilot is connected to a separate air source which is above 40 PSI.


Is the ion xe spool or poppet valve?

Spool. you can tell easily between spool and poppet, because a poppet valve has a visible bolt with a cocking lever on in, whereas spools have no external bolt. Look ate the planet eclipese EGO and the GEO and you will see what i mean.


Does a pneumatic spool valve require lubrication?

A pneumatic spool valve usually has two sets of atleast one but possibly more rubber o-rings which does indeed need lubrication to function properly.


How does a brake pressure control valve work?

the brake control valve is used to control the amount of hydrauic pressure form the hydraulic system to the brake system through the metering valve.


How do you set valve lash on 4.0 Chrysler?

There is no valve adj on a 4.0l it has hydraulic valve lifters.


What does a modulator spool in a transmission?

If you are asking the function of a modulater valve,it is to smooth out the shifts in an automatic transmission.


How does solenoid hydraulic valve work?

A solenoid valve is a type of valve that uses an electrical current to actuate or shift a spool or cartridge consisting of a solenoid coil and tube assembly. Basically, this valve type uses an electric current to shift a pin to perform simple A/B tasks such as open/close valve spools. The designation "solenoid" means that the valve operation is electrical not manual. Maybe the easiest way to describe a solenoid valve is by thinking about an automatic car lock. The electric current get triggered, the pin gets pushed up and the doors are unlocked. A reverse current gets triggered, the pin gets pushed down, and the doors are locked.


What does byd mean on a hydraulic valve?

power beyond