Threaded cartridge electrical control bidirectional pressure compensation flow valve
Technical field
The present invention relates to a kind of automatically controlled bidirection press compensating flowrate valve, relate in particular to a kind of threaded cartridge electrical control bidirectional pressure compensation flow valve, can realize double speed control and have the oil hydraulic circuit of pressure compensation, can be applied in the oil hydraulic circuits such as mobile device and industrial vehicle.
Background technique
At mobile device, the loop such as medical apparatus and industrial vehicle requires in the work system of steady lifting, usually need to realize the two-way double speed pressure compensation, at present, often all be to adopt damascene structures, combine by two pressure compensated flow valves, the compensation of realization bidirection press, further for realizing double speed electrical control, more need to increase on this basis a bidirectional electromagnetic valve control, form a duty valve piece, such structure causes installation volume larger, system is difficult to integrated, the processing more complicated, and the flexibility of control reaction is lower, and holistic cost is higher.
Summary of the invention
Technical problem to be solved by this invention is that a kind of volume compact, threaded cartridge electrical control bidirectional pressure compensation flow valve that degree of integration is high are provided for the above-mentioned state of the art.
Another technical problem to be solved by this invention provides a kind of cost relatively cheap threaded cartridge electrical control bidirectional pressure compensation flow valve.
Another technical problem to be solved by this invention provides a kind of and is quick on the draw, reliable stable threaded cartridge electrical control bidirectional pressure compensation flow valve.
The present invention solves the problems of the technologies described above the technological scheme that adopts: a kind of threaded cartridge electrical control bidirectional pressure compensation flow valve is characterized in that comprising
Swivel nut, hollow forms inner chamber;
Plunger tube, in be provided with one can axially movable moving iron;
Decide iron, be located at the rearward end of aforementioned plunger tube;
Coil is coated on aforementioned decide iron and the plunger tube outside, can make after the energising and decide the magnetic field that the iron generation attracts moving iron to move backward;
Return unit forces moving iron to keep proal trend all the time;
Valve pocket is located at the front end of aforementioned swivel nut, has the first hydraulic fluid port and the second hydraulic fluid port that the spaced radial at the axially open of front end and middle part is arranged, and valve pocket has the first oil through of an inside and outside logical oil;
Main valve plug is connected in the front end of aforementioned moving iron, and front end axially forms groove, and the sidepiece of this groove has the first opening that communicates with the first hydraulic fluid port and the second opening that communicates with the second hydraulic fluid port, is formed with a blocking-up near aforementioned the first opening radial protrusion and encircles;
Spring seat is located on the groove port of aforementioned main valve plug and is had one from outside to inside unidirectional damping hole;
Compensating spool is arranged in the groove of aforementioned main valve plug and can moves axially, and both ends open forms respectively front axial groove and rear axial groove, and the middle part has the throttle orifice that is communicated with aforementioned front axial groove and rear axial groove;
Front spring is arranged in the groove of aforementioned main valve plug, and front end and aforementioned spring seat offset, and rear end and aforementioned front axle offset to the bottom land wall; And
Rear spring is arranged in the groove of aforementioned main valve plug, and front end and aforementioned rear axial bottom land wall offset, and rear end and groove diapire offset,
Aforesaid coil is in not under the "on" position, and aforesaid the first hydraulic fluid port and the second hydraulic fluid port are connected by throttle orifice; Aforesaid coil is under the "on" position, and aforesaid main valve plug is mobile backward, and aforesaid blocking-up ring moves to the first oil port with main valve plug and then makes aforesaid the first hydraulic fluid port and the direct connection of the second hydraulic fluid port and maintenance rated flow.
Further, be provided with the resilient key of a steel ball and spacing steel ball in the described unidirectional damping hole.
As preferably, described resilient key is a barrel shaped, and, because having one first breach tensioning, length direction is assemblied in the unidirectional damping hole, and described resilient key forms fuel feeding near an end of steel ball and enters the second breach in the resilient key.Arrange simply, practicability and effectiveness is reliable.
The rearward end of described main valve plug is T-shaped, and accordingly, the front end of described moving iron forms the adaptive T-shaped groove of rearward end for aforementioned main valve plug, and the ear end face of described main valve plug is an outer convex surface.Main valve plug and moving iron adopt this floating connecting structure, can automatically regulate centering in the running.
The surface of contact of described main valve plug and valve sleeving inner wall forms the first oil groove of annular, and the surface of contact of described compensating spool and main valve plug inwall forms the second oil groove of annular.The first oil groove and the second oil groove improve centering, thereby improve the sealing between the surface of contact, can also play the oil storage lubrication simultaneously.
Described compensating spool rear and front end all has the second oil through of moment draining.The second oil through can guarantee in the Oil shocking process, and the fluid in the cavity volume can be discharged rapidly, guarantees the compensating spool flexible operation.
The front end inwall of described valve pocket forms the first jump-ring slot, and one first jump ring is located in this first jump-ring slot and main valve plug is limited in the valve pocket.The front end inwall of described main valve plug forms the second jump-ring slot, and one second jump ring is located in this second jump-ring slot and spring seat is limited in the main valve plug.Installation arranges simple compactness, effectively guarantees simultaneously the part concentricity requirement.
The front end outer wall of described spring seat forms a circular groove, and a seal ring is arranged in this circular groove and makes spring seat outer wall and main valve plug inwall keep sealing.
Compared with prior art, the invention has the advantages that: volume compact, multi-functional integrated structure, mounting or dismounting are convenient, oil liquid resistance reduces, and the oil liquid pressure reaction is used reliable stablizing fast for a long time, and maintenance rate is low, compare existing mounting structure, the global design cost is lower again, is quick on the draw.By controlling equivalent throttle orifice size, change the variation characteristic of output flow, in conjunction with the control of bidirectional spring, realize the bidirection press compensate function, guarantee two-way output constant flow rate.
Description of drawings
Fig. 1 is the example structure schematic representation.
Fig. 2 is main valve plug and compensating spool combined amplifier figure among Fig. 1.
Fig. 3 is the partial enlarged drawing of Fig. 1.
Fig. 4 be among Fig. 1 valve pocket along the sectional view of A-A direction.
Fig. 5 is Fig. 1 Elastic pin stereo amplification figure.
Embodiment
Embodiment is described in further detail the present invention below in conjunction with accompanying drawing.
As shown in Figure 1, the threaded cartridge electrical control bidirectional pressure compensation flow valve of present embodiment comprises swivel nut 2, plunger tube 22, moving iron 4, return unit 73, coil 21, decides iron 3, valve pocket 1, main valve plug 5, compensating spool 6, spring seat 8, front spring 72 and rear spring 71.
Swivel nut 2 hollows form inner chamber, be provided with the axially movable moving iron 4 of energy in the plunger tube 22, decide iron 3 and be located at the rearward end of plunger tube 22, coil 21 is coated on decides iron 3 and plunger tube 22 outsides, can make fixed 3 to produce the magnetic field that attracts moving iron 4 to move backward after the energising, return unit 73 forces moving iron 4 to keep proal trend all the time, and present embodiment adopts to be located at moving iron 4 and to decide Returnning spring between the iron 3.
Valve pocket 1 is located at the front end of swivel nut 2, has the first hydraulic fluid port 11 and the second hydraulic fluid port 12 that the spaced radial at the axially open of front end and middle part is arranged; Valve pocket 1 has first oil through 13 (with reference to figure 3 and shown in Figure 4) of an inside and outside logical oil, and in coil 21 no electric circuit situations, when fluid flowed from the second hydraulic fluid port 12 to the first hydraulic fluid port 11, main valve plug 5 front-end faces were consistent with the ear end face oil pressure.
Main valve plug 5 is connected in the front end of moving iron 4, main valve plug 5 front ends axially form groove, the sidepiece of this groove has the first opening 51 that communicates with the first hydraulic fluid port 11 and the second opening 52 that communicates with the second hydraulic fluid port 12, is formed with a blocking-up near the first opening 51 radial protrusions and encircles for 55 (as shown in Figure 2).
Spring seat 8 is located on the groove port of main valve plug 5 and is had one from outside to inside unidirectional damping hole 81.Be provided with the resilient key 9 of steel ball 93 and spacing steel ball 93 in the unidirectional damping hole 81.With reference to shown in Figure 5, resilient key 9 is a barrel shaped, and, because having 91 tensionings of the first breach, length direction is assemblied in the unidirectional damping hole 81, and an end of resilient key 9 close steel balls 93 forms fuel feeding and enters the second interior breach 92 of resilient key.Spring seat 8 adopts unidirectional inlet hole structure, can guarantee that fluid is unidirectional to enter, and then make spring seat 8 keep motionless; Simultaneously, during pressure compensation, spring seat 8 logical oil are closed, and Rapid Establishment fluid is realized pressure compensation, plays the rapid response effect.The front end outer wall of spring seat 8 forms a circular groove, and seal ring 76 is arranged in this circular groove and makes spring seat 8 outer walls and main valve plug 5 inwalls keep sealing, guarantees the sealability of spring seat 8 and main valve plug 5, can set up rapidly oil pressure.
Compensating spool 6 is arranged in the groove of main valve plug 5 and can moves axially, both ends open forms respectively front axial groove and rear axial groove, the middle part has the throttle orifice 63 that is communicated with front axial groove and rear axial groove, and compensating spool 6 rear and front ends all have the second oil through 61 of moment draining.The second oil through 61 can guarantee in the Oil shocking process, and the fluid in the cavity volume can be discharged rapidly, guarantees the compensating spool flexible operation.
Front spring 72 is arranged in the groove of main valve plug 5, and front end and spring seat 8 offset, and rear end and front axle offset to the bottom land wall; Rear spring 71 is arranged in the groove of main valve plug 5, and front end and rear axial bottom land wall offset, and rear end and groove diapire offset.
In conjunction with shown in Figure 2, the rearward end 53 of main valve plug is T-shaped, and accordingly, the front end of moving iron 4 forms for the adaptive T-shaped groove of the rearward end 53 of main valve plug, and the ear end face 531 of main valve plug is an outer convex surface.Main valve plug 5 adopts this floating connecting structure with moving iron 4, can automatically regulate centering in the running.
In conjunction with shown in Figure 2, main valve plug 5 forms the first annular oil groove 54 with the surface of contact of valve pocket 1 inwall, and compensating spool 6 forms the second annular oil groove 64 with the surface of contact of main valve plug 5 inwalls.The first oil groove 54 and the second oil groove 64 improve centering, thereby improve the sealing between the surface of contact, can also play the oil storage lubrication simultaneously.
The front end inwall of valve pocket 1 forms the first jump-ring slot, and the first jump ring 75 is located in this first jump-ring slot and main valve plug 5 is limited in the valve pocket 1.The front end inwall of main valve plug 5 forms the second jump-ring slot, and the second jump ring 74 is located in this second jump-ring slot and spring seat 8 is limited in the main valve plug 5.Installation arranges simple compactness, effectively guarantees simultaneously the part concentricity requirement.
Coil 21 is in not under the "on" position, deciding iron 3 does not work, when fluid replenishes fluid from the first hydraulic fluid port 11 to the second hydraulic fluid port 12, main valve plug is motionless in the first jump ring 74 effect lower limit, when oil liquid pressure increased, compensating spool 6 moved, and causes the second hydraulic fluid port 12 bores to diminish, fluid flows to the second hydraulic fluid port 12 from the first hydraulic fluid port 11 through throttle orifice 63, and bulk flow keeps constant and is not subjected to the induced pressure variable effect of downstream loop; Coil 21 is in not under the "on" position, deciding iron 3 does not work, when fluid replenishes fluid from the second hydraulic fluid port 12 to the first hydraulic fluid port 11, since the first oil through 13 exist main valve plug 5 ear end faces consistent with front-end face fluid, main valve plug 5 still still is limited in and keeps static on the first jump ring 74, when oil liquid pressure increases, compensating spool 6 moves, cause the first hydraulic fluid port 11 bores to diminish, fluid flows to the first hydraulic fluid port 11 from the second hydraulic fluid port 12 through throttle orifice 63, and bulk flow keeps constant and is not subjected to the induced pressure variable effect of downstream loop; Coil 21 is under the "on" position, deciding iron 3 work attracts moving iron 4 to overcome return unit 73 elastic force, main valve plug 5 servo-actuated iron 4 are mobile backward, blocking-up ring 55 moves to the first hydraulic fluid port 11 places with main valve plug 5, fluid is no matter be to flow to the second hydraulic fluid port 12 from the first hydraulic fluid port 11 like this, and still flowing to the first hydraulic fluid port 11 from the second hydraulic fluid port 12 all keeps rated flow.The use of this valve can be satisfied the oil circuit control of two-way double speed function.