CN1322239C

CN1322239C - Rotary digital direction flow valve without shaft extensions

Info

Publication number: CN1322239C
Application number: CNB2005100827208A
Authority: CN
Inventors: 孙勇
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-07-11
Filing date: 2005-07-11
Publication date: 2007-06-20
Anticipated expiration: 2025-07-11
Also published as: CN1699763A

Abstract

The utility model discloses the utility model of a rotary digital direction flow valve without shaft extension, which is mainly characterized in that a valve core is composed of a driving valve core (4) without shaft extension and a driven valve core (2) without shaft extension which are opposite. In addition, the valve core is supported on and penetrates through penetrating shafts (1) in the driving valve core (4) without shaft extension and the driven valve core (2) by a bearing (11). A shielding body (3) is arranged in a hole of the driven valve core (2) without shaft extension. The penetrating shafts (1) are arranged on the inner side of a left end cover (6) and the inner side of a right end cover (6'). The outer circumference of the valve core (4) is provided with teeth engaged with teeth on an input gear (9). The holes in the opposite driving and the driven valve cores of the utility model are simultaneously processed to keep consistency. Therefore, four control edges are ensured to absolutely not be shielded. Therefore, quality is enhanced, and technology cost is lowered. Because the penetrating shafts, the rolling bearing and a seal end cover without shaft extension are adopted, end surface side pressure is balanced. A valve body can rotate flexibly with small abrasion so as to enhance a response speed and a service life.

Description

Rotary digital direction flow valve without shaft extensions

Technical field: the present invention relates to control hydraulic parts, particularly be a kind of with increment type pulse digit amount controlling party to the hydraulic valve piece of flow, what be specifically related to is a kind of rotary digital direction flow valve without shaft extensions.

Background technique: the structure of the employed digital directional flow valve of prior art mostly is the sliding valve structure that the spin leading screw drags, and under the control of zero position sensor, makes the spool zero dead stop.Causing valve body undercut groove and spool control limit is that negative or positive hides, and the blind area has appearred in both sides, and this has just reduced control accuracy, its technology is more complicated also, these valves mostly are directional control valve and Flow valve is that two spools are combined on the valve body, complex structure, and volume is big.

Summary of the invention: the technical problem that the present invention solves is that it can make four control limits be easy to reach the pressure balance of zero lap and end face and side on technology.To achieve the above object, the present invention is finished by following mode: this valve has spool, valve seat and end cap, described valve seat is provided with stepper motor, input gear and feedback gear, the rotating shaft of stepper motor connects the input gear, it is characterized in that described spool is made of with the driven spool of no shaft extension no shaft extension active spool, described no shaft extension initiatively spool runs through axle with middle being provided with of the driven spool of no shaft extension, run through the bearing that axle is provided with the supporting spool, the described axle that runs through is installed in the end cover, be provided with screen body in the hole of the driven spool of described no shaft extension, described no shaft extension active spool is provided with driving cog with the excircle of the driven spool of no shaft extension, and this driving cog meshes with input gear and feedback gear respectively.Described bearing is four, and is supporting no shaft extension initiatively spool and the driven spool of no shaft extension respectively.Digital directional flow valve of the present invention is to utilize the axle that runs through in spool middle part, with two sections opposed spools of bearings.Spool bore is built-in with the screen body that possesses speed-regulating function.The no shaft extension initiatively rotation of spool realizes by step motor drive input gear shaft.The feedback quantity of control is to rotate the driven spool of no shaft extension by feedback gear to finish direction, flow, position, synchronous control.Hole in driving and driven two opposed spools of the present invention processes simultaneously, keeps its conformity, has guaranteed that therefore four control limits are that absolute zero hides.So improved quality, reduced the technology cost, run through axle and rolling bearing and do not have shaft extension spool and end cover owing to adopt, make end face side pressure balance, valve body rotates flexibly, wearing and tearing are little, has improved speed of response and life-span.The present invention also allows to adopt low-power stepper motor, and this just cuts down the consumption of energy and cost, therefore compared with prior art, has outstanding substantive distinguishing features and obvious improvement.

Description of drawings: the present invention has following accompanying drawing:

Fig. 1 is a structural representation of the present invention.

Embodiment: accompanying drawing has been represented structure of the present invention and embodiment, further describes the relevant details and the working principle of embodiment below more in conjunction with the accompanying drawings.Integral body of the present invention is made up of automatically controlled part, valve portion and do-part, wherein the electric control part branch comprises that speed and location procedure are given, the controllers of handling the microprocessor of this program and this microcomputer signal being amplified etc., this part is a prior art, can obtain on market.This valve portion and do-part have spool, valve seat 5 and

end cover

6,6`, described valve seat 5 is provided with the stepper motor 7 of receiving digital signals, input gear 9 and feedback gear 10, the power supply of the automatically controlled part in described stepper motor and the control box is electrically connected, the rotating shaft of stepper motor 7 connects input gear 9, described spool is made of with the driven spool 2 of no shaft extension opposed no shaft extension active spool 4, be provided with in described no shaft extension active spool 4 and the driven spool 2 of no shaft extension and run through axle 1, described no shaft extension master, driven spool 4,2 by four bearings 11 be bearing in run through the axle 1, be provided with screen body 3 in the hole of the driven spool 2 of described no shaft extension with speed-regulating function, the described axle 1 that runs through is installed in end cover 6, in the 6`, be equipped with driving cog on the excircle of described no shaft extension active spool 4 and the driven spool 2 of no shaft extension, this driving cog meshes with tooth and the feedback gear 10 imported on the gear 9 respectively.When the present invention works, open the control box power supply, the pulse information that is provided by programming in the control box sends stepper motor 7 to after amplifying processing, stepper motor 7 is rotated, step motor drive input gear 9 makes initiatively spool 4 rotations of no shaft extension, no shaft extension initiatively spool 4 is rotated and has just been changed zero lap, by opening the distribution of pressure oil or oil return is carried out in hydraulic actuator two chambeies, carries out flow control by flow control covering members 3 then.And the straight-line displacement of final controlling element or angular displacement, by machine feedback or electron feedback, feed back drive unit (not shown) by another feedback gear 10 is rotated, rotate, make the driven spool 2 of no shaft extension follow the tracks of no shaft extension active spool 4 and return to zero lap thereby drive the driven spool 2 of no shaft extension.Described run through the axle 1 and above four rolling bearings 11 supporting the driving and driven spool 4,2 of opposed no shaft extension with one heart, this has just reduced the surface friction drag and the wearing and tearing of spool.Also, make four rotary end surface side pressure balances that reach between spool and the spool between spool and the end cap, reduced the rotation torque, thereby just improved the speed of response and the feedback accuracy of spool because the end cap 6, the 6` that adopt are sealing configuration and the no shaft extension spool of cooperation.The present invention can more accurate control hydraulic actuator direction, flow, halt.Turbidity test requirement to medium is low, nothing is worn and torn, the life-span is long, it is flexible to rotate, and higher speed of response and control accuracy are arranged.Operation is simple and reliable.According to the practical test of finished product, no matter on technology, or all have certain advance on the precision, this also will be given and use the field of hydraulic valve piece bring positive using effect.

Claims

1, a kind of rotary digital direction flow valve without shaft extensions, this valve has spool, valve seat and end cap, described valve seat (5) is provided with stepper motor (7), input gear (9) and feedback gear (10), the rotating shaft of stepper motor (7) connects input gear (9), it is characterized in that described spool is by no shaft extension active spool (4), the driven spool of no shaft extension (2) and run through axle (1) and constitute, described no shaft extension initiatively spool (4) runs through on the axle (1) by opposed being bearing in of bearing (11) with the driven spool of no shaft extension (2), the described two ends of running through axle (1) terminate in end cover (6), (6`) inboard, be provided with screen body (3) in the hole of the driven spool of described no shaft extension (2), be equipped with driving cog on the excircle of described no shaft extension active spool (4) and the driven spool of no shaft extension (2), this driving cog meshes with input gear (9) and feedback gear (10) respectively.

2, a kind of rotary digital direction flow valve without shaft extensions as claimed in claim 1 is characterized in that the described bearing (11) that runs through on the axle (1) is four, and is supporting opposed no shaft extension initiatively spool (4) and the driven spool of no shaft extension (2) respectively.