CN201439840U

CN201439840U - Moment motor jet tube pilot valve

Info

Publication number: CN201439840U
Application number: CN2008201574605U
Authority: CN
Inventors: 吴越; 黄碧峰
Original assignee: SHANGHAI NUOMA HYDRAULIC SYSTEM CO Ltd
Current assignee: SHANGHAI NUOMA HYDRAULIC SYSTEM CO Ltd
Priority date: 2008-12-19
Filing date: 2008-12-19
Publication date: 2010-04-21
Anticipated expiration: 2018-12-19

Abstract

The utility model relates to a moment motor jet tube pilot valve, wherein an armature component (4) which comprises a jet tube (41), an intermediate transition body (42), a support mechanism, an oil delivery pipe (44), an armature (45) and a spray nozzle (46); the intermediate transition body (42) is provided with the armature (45) through the support mechanism; the middle of the armature (45) is provided with the jet tube (41); the oil delivery pipe (44) is connected with the oil inlet of the jet tube (41); the spray nozzle hole of the spray nozzle (46) on the jet tube (41) is square, and the ratio of the length to the width thereof is from 3 to 1. The moment motor jet tube pilot valve has the advantages of precise manufacturing, no dead area, no friction pair and high sensitivity, can work at such low pressure of 0.5MPa, and has large flow, high pressure, quick response, high dynamic performance, no dead area, high sensitivity, undamped natural frequency up to 500 to 700Hz and stronger pollution resistant performance compared with the circular spray nozzle jet tube pilot level, and brings convenience for the use and the maintenance.

Description

Torque motor jet tubular type pilot valve

Technical field

The utility model belongs to a kind of pilot valve, particularly relates to a kind of jet tubular type pilot valve.

Background technique

Electrohydraulic servo system is a kind of feedback control system of being made up of electric signal process unit and hydraulic power mechanism.Modal have electro-hydraulic position servo system, electric liquid speed control system and electric fluid power (or moment) control system.The effect of electrohydraulic control is to be the motion of valve with low power electrical signal conversion, with flow and the pressure of control flows to hydraulic power mechanism.Therefore, electrohydraulic control be electro-hydraulic converting element be again power amplification element, its performance is very big to the properties influence of system, is the key element in the electrohydraulic servo system.Hydraulic power mechanism is made up of hydraulic control component, actuator and controlling object.Hydraulic control component often adopts hydraulic control valve or servo variable displacement pump, and the dynamic characteristic of hydraulic power mechanism has determined the performance of electrohydraulic servo system to a great extent.

50 years have been experienced in the development of servovalve, and the occasion of application also is more and more widely.Nozzle bore in the jet tubular type pilot valve in the present existing electrohydraulic control all is circular, and circular nozzle bore is made easy to process, but flow is little, and is dynamically low, low-response, and flow gain is little, and Pressure gain is little; Therefore cause the reliability, sensitivity etc. of electrohydraulic control to be subjected to sizable constraint.

Summary of the invention

Technical problem to be solved in the utility model provides a kind of torque motor jet tubular type pilot valve, and is dynamically low to solve in the prior art, the defective of low-response.

A kind of torque motor jet tubular type pilot valve, armature component wherein (4) comprises jet pipe (41), middle transition body (42), supporting mechanism, transport pipe (44), armature (45), nozzle (46), described middle transition body (42) is installed armature (45) by supporting mechanism, jet pipe (41) is equipped with in the centre of armature (45), transport pipe (44) links to each other with the filler opening of jet pipe (41), the nozzle bore of the nozzle (46) on the described jet pipe (41) is a square opening, and length and width ratio is 3～1.

Degree of finish is Ra0.4～Ra0.45 in the hole of described nozzle bore.

Described supporting mechanism is 2 struts (43).

Described supporting mechanism is a dual-gripper bar composite structure.

Beneficial effect

The utility model is made accurate; No dead band, no friction pair, highly sensitive, 0.5MPa just can work under the low pressure; With respect to circular jet nozzle jet tubular type pilot stage, flow is big, and pressure is big, and response is fast, dynamically high, no dead band, highly sensitive, undamped natural frequency can reach 500 ~ 700Hz, contamination resistance is stronger, and is lower to system's turbidity test requirement, brings convenience to operation and maintenance.The electrohydraulic control of making pilot stage with this valve can be adapted to displacement, speed, power (or pressure) electrohydraulic servo-controlling system, has very high dynamic response.Especially use on hot rolling of metallurgy industry steel mill and cold rolling line, be used to control steel plate thickness and width.

Description of drawings

Fig. 1 is the sectional view of the utility model plan view;

Fig. 2 is the utility model plan view;

Fig. 3 is the sectional view of left view;

Fig. 4 is the sectional view of armature component plan view;

Fig. 5 is the worm's eye view of armature component;

Fig. 6 is the K portion zoomed-in view of Fig. 5;

Fig. 7 is the sectional view of armature component left view.

Embodiment

Below in conjunction with specific embodiment, further set forth the utility model.Should be understood that these embodiments only to be used to the utility model is described and be not used in the restriction scope of the present utility model.Should be understood that in addition those skilled in the art can make various changes or modifications the utility model after the content of having read the utility model instruction, these equivalent form of values fall within the application's appended claims institute restricted portion equally.

Embodiment 1

A kind of torque motor jet tubular type pilot valve, armature component 4 wherein comprises jet pipe 41, middle transition body 42, strut 43, transport pipe 44, armature 45, nozzle 46, described middle transition body 42 is installed armature 45 by 2 struts 43, jet pipe 41 is equipped with in the centre of armature 45, transport pipe 44 links to each other with the filler opening of jet pipe 41, the nozzle bore of the nozzle 46 on the described jet pipe 41 is a square opening, and degree of finish is Ra0.4～Ra0.45 in the hole, and Elongation is 0.8: 0.45.

As shown in Figure 1, the utility model is made up of guide's valve body 1, Receiver 2, armature component 4, setting sleeve 5, jet pipe box 6, magnetic conductance seat 7, magnet steel 8, pressing plate 9, coil block 13, iron core 14 and relevant mounting screw, plain washer, spring washer and seal ring thereof.

Armature component 4 comprises jet pipe 41, middle transition body 42, strut 43, transport pipe 44, armature 45, nozzle 46 shown in Fig. 4,5,6,7; Strut 43 adopts Type of Welding to be connected with armature 45, middle transition body 42 and transport pipe 44 with jet pipe 41, middle transition body 42, and is very reliable.Connecting becomes one is called armature component 4, and nozzle 46 adopts press-fit to be connected back riveted joint, reliable in structure with jet pipe 41.

Assemble sequence is: Receiver 2 is pressed in guide's valve body 1, and first then jet pipe box 6 and setting sleeve 5 are contained on the armature component 4, are screwed on guide's valve body 1 with screw 3 again; Then magnetic conductance seat 7 and magnet steel 8 are contained on the middle transition body 42 of armature component 4, fixing and adjust the position, at last coil block 13, iron core 14 and pressing plate 9 are assembled, be fixed on the magnetic conductance seat 7.Guide's valve body bottom surface seal ring is installed at last.Also to go up test stand adjustment nozzle-Receiver position after torque motor installs and make the pressure in Receiver two chambeies reach the designing requirement value, adjust the back and fix, and the test curve that draws.

The servovalve working principle is such: the input current command signal will produce the two ends that electromagnetic force acts on armature 45 for the coil block 13 of torque motor 1, and armature 45 and nozzle 46 also are one, so armature 45 deflections drive nozzle 46 deflections.Filler opening is by transport pipe 44 oil-feeds, penetrate by nozzle 46, arrive 2 liang of holes of Receiver, and the deflection of nozzle 46 angles will reduce the flow in Receiver 2 a certain chambeies, and then changed pressure with this chamber, and another cavity pressure reduces, because of flow and pressure and current signal are corresponding relations, so can obtain certain flow and pressure according to given size of current, the oil return of pilot stage is flowed back to system's fuel tank through the semi-circular hole on Receiver limit in addition.

Claims

1. torque motor jet tubular type pilot valve, it is characterized in that: armature component wherein (4) comprises jet pipe (41), middle transition body (42), supporting mechanism, transport pipe (44), armature (45), nozzle (46), described middle transition body (42) is installed armature (45) by supporting mechanism, jet pipe (41) is equipped with in the centre of armature (45), transport pipe (44) links to each other with the filler opening of jet pipe (41), the nozzle bore of the nozzle (46) on the described jet pipe (41) is a square opening, and length and width ratio is 3～1.

2. torque motor jet tubular type pilot valve as claimed in claim 1, it is characterized in that: degree of finish is Ra0.4～Ra0.45 in the hole of described nozzle bore.

3. torque motor jet tubular type pilot valve as claimed in claim 1 or 2 is characterized in that: described supporting mechanism is 2 struts (43).

4. torque motor jet tubular type pilot valve as claimed in claim 1 or 2 is characterized in that: described supporting mechanism is a dual-gripper bar composite structure.