CN202228457U

CN202228457U - Electro-hydraulic servo valve

Info

Publication number: CN202228457U
Application number: CN2011203605120U
Authority: CN
Inventors: 熊路元; 黄龙; 万恩凤
Original assignee: HUBEI HANGAO SERVO TECHNOLOGY Co Ltd
Current assignee: Hubei HA Servo Co., Ltd.
Priority date: 2011-09-24
Filing date: 2011-09-24
Publication date: 2012-05-23
Anticipated expiration: 2021-09-24

Abstract

An electro-hydraulic servo valve is used for being installed in spacious occasions of hot-rolled steel plates and comprises a casing assembly, a valve housing, a movable valve core, a retaining plate, an end cover assembly, a spring pipe, a nozzle seat assembly, an armature assembly, an upper magnetizer, a lower magnetizer, magnetic steel, a coil assembly, an elastic sheet, an upper cover assembly, a socket, an eccentric shaft, an oil filter cover assembly, a small plug assembly and the like. When an analog electric signal is accepted, armature enables the retaining plate to deflect automatically, modulation flow and pressure are output correspondingly, and the flow of the oil supply port and the oil return port is controlled automatically, thereby enabling a hydraulic system connected with the oil supply port and the oil return port to move and change so as to meet the requirements of load set. Due to the fact that an inserted hole axis is perpendicular to a movable valve core, the electro-hydraulic servo valve is particularly suitable for the occasions of the hot-rolled steel plates controlled by a rated current of 50mA and the electric signal with resistance of 40omega. The rated flow can reach 100L/min, and zero drift<=2%. The electro-hydraulic servo valve is high in dynamic respond, reliable in work, strong in pollution resistance capacity and long in service life. In addition, the electro-hydraulic servo valve adopts a stainless steel casing so as to have light weight and a compact structure.

Description

Electrohydraulic control

Technical field

The utility model relates to the servo control technique field, is the big flow of 100L/min specifically, is applicable to a kind of electrohydraulic control of the hot rolling steel plate production environment that installing space is narrow and small relatively.

Background technique

Electrohydraulic control is the key element in the electrohydraulic servo-controlling system; It is a kind of accept analog electric signal after; The flow of corresponding output modulation and the hydraulic control valve of pressure; Have characteristics such as compact structure, stable and reliable working performance, dynamic response are high, range of flow is wide, contamination resistance is strong, volume is little, in light weight, be widely used in the electrohydraulic servo-controlling system in field such as Aeronautics and Astronautics.But it is parallel with movable spool with the receptacle axis that the side spring sheet communicates to be used for connector assembly on the cover assembly; Housing square edged orifice be of a size of 1.6 * 2

to 1.6

* 3

between; Flow is little, is not suitable for absolutely empty narrow and small relatively hot rolling steel plate production environment is installed.

Summary of the invention

For overcoming the deficiency of existing technology, the goal of the invention of the utility model is to provide a kind of electrohydraulic control, makes the production environment of servovalve applicable to the narrow and small relatively hot rolling steel plate of installing space.

For realizing above-mentioned purpose; The bottom of the utility model frame set is provided with oil-feed port and return opening, and valve pocket is housed in the frame set, and the movable spool of being regulated by baffle plate is contained in the valve pocket; Form oil pocket between valve pocket and the frame set; Be inlaid with the lining that is used to connect the oil return control chamber in the valve pocket, the side that realization seals and separately the end-cap assembly of oil circuit is connected frame set, the inner end of end-cap assembly connects with a side of movable spool; The opposite side of frame set is equipped with end cap, and its inner end connects with the opposite side of movable spool; Baffle plate is connected with bourdon tube; Bourdon tube is supported on the nozzle carrier assembly, and armature component is connected with baffle plate, and last magnet case is fixed on magnet steel on the nozzle carrier assembly with link with following magnet case; The upper set of coils part is fixed in the magnet case through last spring sheet, side spring sheet; The lower coil assembly is fixed on down in the magnet case through the side spring sheet, between following magnet case and the nozzle carrier assembly adjustment pad is housed, and cover assembly is contained in frame set top; Socket communicates with the side spring sheet, and it is vertical with movable spool to be used for the receptacle axis that socket communicates with the side spring sheet on the cover assembly; The nozzle carrier assembly is connected the upper surface of frame set, and its two nozzles are relative with baffle plate, and two oil circuits communicate with the oil pocket of frame set about the nozzle carrier assembly; With the movable vertical side of spool the eccentric shaft that is used for fixing valve pocket is housed on the frame set; The opposite side of frame set is equipped with the oil filter cap assemblies that is used for fixing the button filter and separates oil circuit; Frame set is interior, the little screw plug assembly that has little obstruction is equipped with in oil filter cap assemblies side; With in movable spool parallel direction, the frame set plug is housed, the throttle orifice assembly is connected with plug.

After the utility model is accepted analog electric signal; By armature component the baffle plate in the bourdon tube is deflected automatically; The flow and the pressure of corresponding output modulation; Thereby control supplies automatically, the flow of return opening, the motion of the hydraulic system that is connected with confession, return opening is changed, so that load reaches the usage requirement of setting.

The utility model compared with prior art because it is parallel with movable spool with the receptacle axis that the side spring sheet communicates to be used for connector assembly on the cover assembly, is specially adapted to the production environment of the narrow and small hot rolling steel plate of installing space; Under the electrical signal control of rated current 50 mA, coil resistance 40 Ω, rated flow can reach 100 L/min, drift≤2%; Dynamic response is high, reliable operation, and contamination resistance is strong; Volume is little, and the life-span is long; And the employing Stainless Steel Shell, compact structure, in light weight.

Description of drawings

Fig. 1 is the utility model structural representation sketch;

Fig. 2 is the A-A sectional view of Fig. 1;

Fig. 3 is Fig. 1 plan view.

Embodiment

Like Fig. 1, Fig. 2, shown in Figure 3; The bottom of frame set 2 is provided with oil-feed port 28 and return opening 29; In the basic part case assembly 2 valve pocket 10 is housed; The movable spool of being regulated by baffle plate 27 11 is contained in the valve pocket 10; Valve pocket 10 forms 5 oil pockets with frame set 2; With spool 11 coupling control flow rate, be inlaid with the lining 18 that is used to connect the oil return control chamber in the valve pocket 10, square hole size Φ 9.2

of valve pocket 19* 3

; The side that realization seals and separately the end-cap assembly 1 of oil circuit is connected frame set 2; The end of end-cap assembly 1 connects with a side of movable spool 11, and the opposite side of frame set 2 is equipped with end cap, and the opposite side of the end of end cap and spool 11 connects; Baffle plate 27 is connected with bourdon tube 26, and bourdon tube 26 is supported on the nozzle carrier assembly 16, and bourdon tube 26 is connected with armature component 25; Bourdon tube 26 is used to support armature component 25; Recover resiliently deformable, last magnet case 6 is fixed on magnet steel 14 on the nozzle carrier assembly 16 with link with following magnet case, and last magnet case 6 forms the closed-loop path, magnetic field with following magnet case under "on" position; Upper left coil block 4, upper right coil block 8 are fixed in the magnet case 6 through last spring sheet 7, side spring sheet 15; The lower coil assembly is fixed on down in the magnet case through side spring sheet 15, and upper and lower coil block is used for electromagnetic conversion, is equipped with between following magnet case and the nozzle carrier assembly 16 to be used to adjust the armature component 25 and the adjustment pad 9 in magnet case gap up and down; Cover assembly 3 is contained in frame set 2 tops; Be used to prevent dust, protect the anti-interference of electric component and inner components and parts, socket 17 communicates with side spring sheet 15, and the screw 5 on the last magnet case 6 is used for fixing the wiring that is connected with last spring sheet 7; It is vertical with movable spool 11 to be used for the receptacle axis that socket 17 communicates with side spring sheet 15 on the cover assembly 3, is specially adapted to the production environment of the narrow and small relatively hot rolling steel plate of installing space; The nozzle carrier assembly 16 that plays the control amplification is connected the upper surface of frame set 2, and its two nozzles are relative with baffle plate 27, and two oil circuits communicate with the oil pocket of frame set 2 about nozzle carrier assembly 16; Frame set 2 with movable spool 11 vertical sides the eccentric shaft 12 that is used for fixing valve pocket 10 and has seal ring 13 is housed; The other end of frame set 2 is equipped with the oil filter cap assemblies 22 that is used for fixing button filter 21 and separates oil circuit; In the frame set 2, oil filter cap assemblies 22 sides be equipped with have a little obstruction 19 be used for the little screw plug assembly 20 of shutoff oil circuit; With in movable spool 11 parallel directions, the frame set 2 plug 23 is housed, throttle orifice assembly 24 is connected with plug 23.

The utility model is given upper and lower coil block through socket 17 inputs one current command signal; Coil will produce the two ends that electromagnetic force acts on armature component 25; The baffle plate 27 that therefore armature drive in the bourdon tube 26 deflects; The deflection of baffle plate 27 (to be deflected to example left) will reduce the flow of nozzle carrier assembly 16 leftmost nozzles, and then strengthen the pressure of spool 11 1 sides that nozzle therewith communicates, and promote spool 11 and move right; The passage between oil-feed port and the control port has been opened in the displacement of spool 11; Linked up the oil circuit between return opening and another control port, the displacement of spool 11 simultaneously also produces an active force to baffle plate 27, and this active force has formed the restoring moment to baffle plate 27.When the electromagnetic force of this restoring moment and torque motor acted on the equalising torque at baffle plate place, baffle plate 27 was got back to zero-bit, and the enable possition that spool 11 keeps this state of equilibrium changes up to the given current signal of importing.

In a word, the displacement of spool 11 is directly proportional with the current signal size of input, and under constant valve port pressuring drop, the load flow that flows through valve is directly proportional with the displacement of spool 11.

Claims

1. electrohydraulic control; It is characterized in that: the bottom of frame set (2) is provided with oil-feed port (28) and return opening (29); Valve pocket (10) is housed in the frame set (2); The movable spool of being regulated by baffle plate (27) (11) is contained in the valve pocket (10), forms oil pocket between valve pocket (10) and the frame set (2), is inlaid with the lining (18) that is used to connect the oil return control chamber in the valve pocket (10); The side that realization seals and separately the end-cap assembly (1) of oil circuit is connected frame set (2); The inner end of end-cap assembly (1) connects with a side of movable spool (11), and the opposite side of frame set (2) is equipped with end cap, and its inner end connects with the opposite side of movable spool (11); Baffle plate (27) is connected with bourdon tube (26); Bourdon tube (26) is supported on the nozzle carrier assembly (16); Armature component (25) is connected with baffle plate (27); Last magnet case (6) is fixed on magnet steel (14) on the nozzle carrier assembly (16) with link with following magnet case; Upper left coil block (4), upper right coil block (8) are fixed in the magnet case (6) through last spring sheet (7), side spring sheet (15), and the lower coil assembly is fixed on down in the magnet case through side spring sheet (15), and adjustment pad (9) is housed between following magnet case and the nozzle carrier assembly (16); Cover assembly (3) is contained in frame set (2) top, and socket (17) communicates with side spring sheet (15); Nozzle carrier assembly (16) is connected the upper surface of frame set (2), and its two nozzles and baffle plate (27) are relative, and two oil circuits communicate with the oil pocket of frame set (2) about nozzle carrier assembly (16); Frame set (2) is gone up with the movable vertical side of spool (11) eccentric shaft (12) that is used for fixing valve pocket (10) is housed; The opposite side of frame set (2) is equipped with the oil filter cap assemblies (22) that is used for fixing button filter (21) and separates oil circuit; Frame set (2) is interior, the little screw plug assembly (20) that has little obstruction (19) is equipped with in oil filter cap assemblies (22) side; With in movable spool (11) parallel direction, the frame set (2) plug (23) is housed, throttle orifice assembly (24) is connected with plug (23).

2. electrohydraulic control according to claim 1 is characterized in that: it is vertical with movable spool (11) to be used for the receptacle axis that socket (17) communicates with side spring sheet (15) on the said cover assembly (3).