CN2162552Y

CN2162552Y - Numerical control valve

Info

Publication number: CN2162552Y
Application number: CN 91216389
Authority: CN
Inventors: 黄德春
Original assignee: Individual
Current assignee: Individual
Priority date: 1991-06-22
Filing date: 1991-06-22
Publication date: 1994-04-20
Anticipated expiration: 2001-06-22

Abstract

The utility model relates to a numerical control valve, which is composed of a sliding valve, a valve sleeve, an end axle, an end housing, a gear, a valve body, a pressure bearing, an O-shaped rubber ring, etc. The numerical control valve is characterized in that oil grooves on the sliding valve and the valve sleeve are respectively provided with three oblique grooves on the same corresponding circle, and the rake angles of the oblique grooves and the axial direction are 0 to 45 DEG; both ends of the valve sleeve and both ends of the sliding valve are provided with the pressure bearings; three sealing rubber rings are arranged between a valve cover and a valve body; the end axle 3 and the valve sleeve 2 are connected; the shapes of the oil grooves on the sliding valve and the valve sleeve can be a helical shape, a V shape, a rectangle, etc. The utility model has the advantages of simple structure, easy fabrication, low cost, smooth start, big oil flow, no leakage, and long service life.

Description

Numerical control valve

The utility model is a kind of improvement of digital valve.

Shortcomings the such as at present digital valve of using exists complex structure, difficulty of processing is big, cost is high, not steady, the oily flow of starting is little, leakage is arranged, fragile.

The purpose of this utility model will provide a kind of modified model Numerical control valve exactly, and it can overcome the above-mentioned shortcoming that exists effectively.

The purpose of this utility model is achieved in that about it is by guiding valve 1, valve pocket 2, end axle 3, end cap 4(each one), gear 5, valve body 6, pressure bearing (two) 7, O type cushion rubber 9,10 and 13 etc. form, and is tube valve, plug-in mounting; Oil groove on guiding valve 1 and the valve pocket 2 changes oblique, three-flute into; Promptly on same corresponding garden, respectively be with three to be 0--45 ° of skewed slot with axial inclination; The opening of valve pocket 2 is monolateral, and last sealing also is monolateral, controlled by feedback signal.Valve pocket 2 and guiding valve relatively rotate with respect to each other; Pressure bearing is equipped with at the two ends of valve pocket 2 and guiding valve 1; Dress sealing O type cushion rubber 9,10,13 between valve pocket 2 and the valve body 6; End axle 3 is connected with valve pocket 2, can affixed, loose joint, but also plug connects; Oil groove 19 on guiding valve 1 and the valve pocket 2 is shaped as spiral chute, it is multiple also to can be made into V-type groove, rectangle groove etc.Oil flow through guiding valve 1, valve pocket 2, valve body 6; Valve is board-like, assembly type.

The concrete structure of model utility is provided by following embodiment and accompanying drawing thereof.

Fig. 1 is the utility model and control valve parts sectional view.

Fig. 2 is spiral slot 19 schematic representation on guiding valve 1 and the valve pocket 2.

Fig. 3 is rectangle groove 19 schematic representation on guiding valve 1 and the valve pocket 2.

Fig. 4 is V-shaped groove 19 schematic representation on guiding valve 1 and the valve pocket 2.

Below in conjunction with details and the working condition of Fig. 1-4 detailed description according to the concrete device that the utility model proposes.

Static structure: guiding valve 1 is sliding to be contained in the valve pocket 2, guiding valve 1 and valve pocket 2 jointly toward each other sliding fit all be sliding being contained in the valve body 6, guiding valve 1 and valve pocket 2 dresses in vivo after, live by the pressure at two ends bearing guard, just left end falls short of because of guiding valve, uses end axle 3 in succession together, guarantees with valve body long together.Can rotate again in order to guarantee that pressure bearing is fixing at two ends, live for 4 grades with two end cap, guiding valve 1 for guarantee end axle and guiding valve can with the 5 affixed rotations of two ends gear.O type cushion rubber 9,10,13 rises between sleeving valve 2 and the body respectively and seals, O type cushion rubber 10 is from internal layer oil sealing between valve pocket 2 and the valve body 6, O type cushion rubber 13 is oil sealings between guiding valve and the sleeving valve 2, O type cushion rubber 9 is to seal at left end, oily opening screw 8 is that end axle 3 is fixed up with valve pocket 2 between end axle 3 and the valve pocket 2, and screw 4 is fixed together with valve body 6, hole around valve body, do to link together, also have four P, O, A, B hole on this external valve body 6 with another part.Make to pass in and out oil and oil and enter A end and the oily hole that is communicated with of B end.The 11st, key, 12 is lock screw, the 14th, the oil cylinder tooth bar, 15 is oil cylinder, the 16th, the small gear on the valve, the 17th, the small gear of stepper motor, 18 is stepper motor.

Dynamic structure: the P hole is an oil inlet hole, be that external oil valve body in passes through guiding valve 2 from entering into here, oil is existed in the skewed slot on the guiding valve, when guiding valve 1 and valve pocket 2 are done the equidirectional rotation, guiding valve 1 is existing oil in the groove to bring in the skewed slot on the valve pocket 2, send into the A end of oil cylinder by the hole A on the valve body 6, after in oil enters A end cylinder, piston on the oil cylinder is moving sliding, be fixed in a tooth bar and an end upward affixed gear engagement drive end axle 3 that giving early in the morning on the cylinder got ready, reach valve pocket 2 and rotate together, at this moment make at guiding valve 1 corresponding with the skewed slot on the valve pocket 2, so external oil is just sent into oil cylinder A end by them, guiding valve rotates by stepper motor 18 and drives.Stepper motor 18 drives small gear 17, driving gear 5 and valve oil cylinder 15, and oil cylinder is walked about, and drive oil cylinder tooth bar 14 is counter with the small gear on the valve 16, and drives valve pocket 2 and guiding valve 1 and do rotation in opposite directions, realizes the action of valve.When stepper motor is made backward rotation, oil is brought oil cylinder B end by guiding valve 1 and skewed slot on the valve pocket 2 again, like this because setting already, award the electrical signal of stepper motor, make upwards commentaries on classics of guiding valve, change downwards, hold commentaries on classics downwards to bring the upwards commentaries on classics of oil cylinder B end into so just external oil is brought into A.Actuator is rotated anyway.Other parts are made support as left and right sides two end axles, and the auxiliary rotation of do usefulness.

Structural feature:

1. guiding valve 1 respectively is with three to be 0-45 ° of skewed slot with axial inclination on same corresponding garden with valve pocket 2, and this has some advantage: (1) oily flow increases three times, and (2) are because the objective reality that exists in the processing, opening is monolateral, it also is monolateral sealing at last, so precision is good, can reach ± below 0.02.Because groove tiltedly flows through in the journey to making at oil, makes guiding valve that the power to right-hand member is arranged naturally, the end axle separates the minimizing contact friction force with spool valve end.So just making stepper motor drive guiding valve rotates flexible, reliable.

2. because valve pocket is improved, opening, seal, all by the feedback signal band, simple in structure, the manufacturing cost is low.Second part number reduces, and has reduced speed detector and position transducer.

3. by the skewed slot effect, make valve pocket 2, guiding valve 1, relatively rotate with respect to each other, flexibly, power consumpiton is few, the life-span of valve is doubled and redoubled; Valve pocket and guiding valve all adopt skewed slot to go into oil, and not only the starting braking is steady, and have dwindled the hole of valve.

4. guiding valve 1, valve pocket 2, valve body 6, oil are through these three distance weak points, and the time of flowing through is few, because the precision height, Location accuracy is ± 0.04.Valve body is taken the QT40-17 material and is born the pressure height, can reach more than the 35MPa.Even can arrive 65MPa.

5. two ends are especially little with the error of simple pressure bearing, valve pocket 2, guiding valve 1 move left and right.Still rotate flexibly.

6. owing to adopt the sealing of each position, valve can be accomplished not have and leak.

7. valve core opening can be designed to high gain type and low gain type, and the former helps improving, and the off-position precision helps reducing impact with reduction dead zone range, the latter, and valve can link together with cylinder, has both simplified part, has improved installation precision again.

8. this valve both had been better than the electrical installations of Proportional valve with the stepper motor logotype, as saved the speed detector, and position transducer, improved positional accuracy again, was convenient to speed controlling again.With regard to this point, than low with the servovalve cost, quality requirement is low, is not easy to damage.More manyed with regard to advantage than Proportional valve.

Claims

1, a kind of Numerical control valve it form by guiding valve (1), valve pocket (2), end axle (3), an end cap (4), gear (5), valve body (6), pressure bearing (7), O type cushion rubber (9), (10) and (16), it is characterized in that:

(1) is tube valve, plug-in mounting;

(2) oil groove on guiding valve (1) and the valve pocket (2) changes oblique, three-flute into; Promptly on same corresponding garden, respectively be with three to be 0～45 ° of skewed slot with axial inclination;

(3) opening of valve pocket (2) is monolateral, and last sealing also is monolateral, and by feedback signal control, valve pocket (2) and guiding valve relatively rotate with respect to each other;

(4) pressure bearing is equipped with at the two ends of valve pocket (2) and guiding valve (1);

(5) dress sealing O type cushion rubber (9), (10), (16) between valve pocket (2) and the valve body (6);

(6) end axle (3) is connected with valve pocket (2), can affixed, loose joint, but also plug connects;

(7) on guiding valve (1) and the valve pocket (2) oil groove (19) is arranged.

2, Numerical control valve as claimed in claim 1 is characterized in that the oil groove (19) on guiding valve (1) and the valve pocket (2) is shaped as V-arrangement.

3, Numerical control valve as claimed in claim 1 is characterized in that the oil groove (19) on guiding valve (1) and the valve pocket (2) is shaped as rectangle.

4, Numerical control valve as claimed in claim 1 is characterized in that the oil groove (19) on guiding valve (1) and the valve pocket (2) is shaped as spiral chute.