Hydraulic valve by valve is not dominated by the number of access Total: 2-pass, three-, four-way and five-pass and so on. Application of the wrong valve spool absolute activities, asphalt traffic, closed down or change the direction of the oil drip, which were hidden hydraulic components and the drive mechanism to fulfill commitments move, close or change the direction of motion.
1, Public Interest Benli
The slide valve type valve's work plan this reason, when the spool will move to the right interval, by thePumpEnter the pressure of oil from the valve port P via A mouth cavity to win the right to the hydraulic cylinder, hydraulic cylinder chamber of the right source of the oil back to tank through the B port,CylinderThe piston to the right movement; the other hand, if the spool to the right when you move a certain interval, the reverse flow, the activities of the piston to the left. Figure 4-3b to its graphic symbol.
2, the construction of valve
Applications manual lever back to change the status of the name implicit change to the spool. Sub-active reset spring (a) with the spring steel ball (b) positioning two kinds.
2) Flexible Valve
Made by way valve known as a flexible valve, it is important spent only moderate mechanical moving parts of the process, but also to help in the installation file in the work table iron or concave-round forcing spool movement, and thus control the direction of flow.
3) Solenoid Valve
Disadvantages with the electromagnet of the electricity sub-call to take power discharge indirectly promote the spool back to the direction of controlled flow. It is non-electric solution of the OAU andHydraulic SystemConversion between the number of suspected components.
For the two three switching solenoid valve structure. In the icon status of the oil port P and A interlinked, oil port B off together; when the electromagnet call power-sharing, bar 1 will pull to the left spool 2 Sweden, when the oil war A broken heart P Kai, while and B interlinked. When the electromagnet power discharge, the spring 3 to promote spool reset. Figure 4-9b for their graphic symbols.
Dominated by the pressure of application of asphalt oil to change the location of valve spool. Plug the other end by a thin non-sealed cavity of the pressure oil back to moving the. As shown, when the pressure oil from the K2 into the slide valve into the cavity left when, K1 switched back to oil, spool to the right move, so that P and B interlinked, A and T interlinked; as K1 traffic pressure on the oil, K2 traffic back to oil, spool to the left moving, so that P and A interlinked, B and T interlinked; as K1 fight K2 Jietong oil return, the spool back to two locations.
5) The electro-hydraulic valve
Shibuya by a solenoid valve with integral hydraulic slide valve. After the solenoid valve V derivative interest rate available, can be controlled by changing the direction of fluid mobility, thus changing the hydraulic slide valve spool position. Hydraulic equipment is used outside the Atlantic.
3, valve characteristics of the performance of war
1) The slide valve, the median performance of
Dominated by three various methods of Stone and three to five general formula for slide valves, spool in position 2, the connectivity of the oil port for the valve case, said the West-bit performance. Rare are the "O" type, "H" type, "P"-type, K "type," M "type and so on.
Analysis and choice of three valve, the median performance, the usual, as appropriate:
(1) system holding pressure P heart block, the system of holding pressure, hydraulic pump for multi-cylinder solution integration.
(2) The solution of integration fluent unloading port P and in T port interlinked, systems unloading. (H K X M-type)
(3) change to the trustworthy take accuracy A, B 2 block west to the process difficult to change the shocks occur, change to the less secure, but the high precision; A, B port Jie Tong T port, change to the Chek stability, but low precision.
(4) starting a secure position out of valves, the hydraulic cylinder of a cavity-pass tank, sealing action when there is sufficient oil-volt slow-Chong, bearing fixed unsafe.
(5) HydraulicFloating and in the free end of the intended location of the next
2) The astringent liquid valve of energy
The dynamic quality of law by the sap flow has known the role of oil pass the spool when the power valve on the fluid dynamics, fluid dynamic steady state and transient fluid dynamic two kinds.
(1) steady-state fluid energy: spool moving over to tell whether fixed before the valve core fluid flow power quality dynamic changes when the fruit used in the spool and the interest rate under the valve port closed without making a large trend in the force, and the valve's source of quality has nothing to do.
(2) Transient Liquid Energy: slide valve in the mobile process, the valve cavity fluid sources from deceleration or acceleration force acting on the spool, take nothing to do and fast-moving degrees.
3) hydraulic Casson picture
Kathan this fruit: dirt entry into the crevice; warming is low and spool contraction; but to be the cause of the slide valve pin the number of HE the Deputy mouth shape and degree of change were cited volt unbalanced radial force role, its important include:
a valve core and valve body between the number of what shape error, axial port line Chek Shen words, but not from the
b spool error in fruit by working with non-inverted cone, shaft mouth line Chek Shen points made, but not
No part of the rise of nominal c spool
Increase the radial force is not a balanced approach:
1) The progress of the production and removal precision
2) Plug Lower Pressure Ring Groove