Hydraulic distributor

FIELD: production of hydraulic distributor for electro-hydraulic amplifiers.

SUBSTANCE: the hydraulic distributor is intended for use in electro-hydraulic amplifiers and is supplied with the drive of a sliding valve made in the form of a turning electrical motor, on the shaft of which there is a cantilever eccentric with a ball bearing. On the sliding valve there is a groove for interaction with the bearing and the shaft sealed with a reinforced sealing ring.

EFFECT: the invention ensures increased efficiency of the hydraulic distributor operation.

2 cl, 4 dwg

 

The present invention relates to the field of hydraulic drive and can be used in electrohydraulic amplifiers pressure or flow.

Known gidroraspredeliteli (see figure 5), comprising a housing, a spool mounted in the housing with the formation of the working cavities, and linear: the actuator of the valve, which consists of permanent magnets (1).

The disadvantages of this hydroaspartate - increased demands on the purity of the working fluid, which should not contain magnetic particles sticking to the permanent magnets of the drive spool. The accumulation of these particles fill the gaps, preventing movement of the spool.

Known valve (see figure 6), comprising a housing, a spool mounted in the housing with the formation of the working cavities, and the drive spool in the form of a rotary electric motor with a rotor having permanent magnets and the shaft with the console eccentric connected with the spool through the bearing, and working cavity is separated from the actuator of the valve seal (2).

In this valve the magnetic particles contained in the working fluid, can't get into the zone of permanent magnets and cause stageline drive spool. However, seals, protects the magnets are located in the extreme bands of the valve, creating what I in turn, the greater the resistance of the actuator, as the friction in the joint between the valve and its actuator. Excessive resistance to movement of the spool causes the large size of the rotary motor and valve in General.

The technical problem of the invention is the reduction of the size of the device.

The technical problem is solved in that in the valve, comprising a housing, a spool mounted in the housing with the formation of the working cavities, and the drive spool in the form of a rotary electric motor with a rotor having permanent magnets and the shaft with the console eccentric connected with the spool through the bearing, and working cavity is separated from the actuator of the valve seal, the valve is made of the transverse groove, the bearing ball made, installed on the console Cam shaft of the rotor and enters the gap in the transverse groove of the valve, and a seal mounted on this shaft. The seal may be made in the form of reinforced cuffs.

Figure 1 shows the structural diagram of the valve, figure 2 - cross section of the rotary motor in figure 3 - cross section along the axis of the drive spool, 4 - groove in the spool bearing.

The valve includes a housing 1, a valve 2 mounted in the housing 1 with the formation of p the working cavities 3, 4 and the actuator 5 of the valve 2 in the form of a rotary motor 6 with the rotor 7 having permanent magnets 8 and the shaft 9 with the console eccentric 10, associated with the spool 2 through the bearing 11. Working cavities 3, 4 are separated from the actuator 5 of the valve 2 gasket 12. In the spool 2 has a transverse groove 13, the bearing 11 is made of ball, mounted on cantilever Cam 10 of the shaft 9 of the rotor 7 and comes with a gap 14 in the transverse groove 13 of the spool 2, and the seal 12 is installed on the shaft 9. The seal 12 is in the form of a reinforced cuff 15. The motor 6 has a stator 16 with the magnetic core 17 and the two poles 18, 19, which is made cylindrical bore 20 and a rotor 7. At the poles mounted control winding 21, 22.

The valve operates as follows.

When the coil is energized in one of the control windings 21, 22 on the shaft 9 of the rotor 7 is generated torque, the magnitude and direction of which are determined by the magnitude and polarity of the current. The Cam 10 through the bearing 11 moves the spool 2. The presence of the gap 14, component units of micrometers, provides a rolling bearing 11 in the transverse groove 13 of the spool 2 with low rolling friction.

Reinforced cuff 15, creating, as well as the friction in the bearing, a slight resistance to the actuator 5 of the valve 2, prevents the working fluid is involved in the rotary motor 6 and sticking it contains metal particles on the permanent magnets 8 of the rotor 7.

A minor load on the actuator 5 of the valve 2 reduces the dimensions of the valve.

Sources of information

1. The prospectus of the company “Moog” “servo-valves series D633 and D634, USA, 1990.

2. The prospectus of the company “Fairey Systems” “Direct drive servo valves”, UK, 1982.

1. Valve, comprising a housing, a spool mounted in the housing with the formation of the working cavities, and the drive spool in the form of a rotary electric motor with a rotor having permanent magnets and the shaft with the console eccentric connected with the spool through the bearing, and working cavity is separated from the actuator of the valve seal, characterized in that the spool is made of the transverse groove, the bearing ball made, installed on the console Cam shaft of the rotor and enters the gap in the transverse groove of the valve, and a seal mounted on this shaft.

2. The valve according to claim 1, characterized in that the seal is made in the form of a reinforced cuff.



 

Same patents:

The invention relates to the field of hydraulic drive and can be used, for example, in hydraulic systems of aircraft

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FIELD: production of hydraulic distributor for electro-hydraulic amplifiers.

SUBSTANCE: the hydraulic distributor is intended for use in electro-hydraulic amplifiers and is supplied with the drive of a sliding valve made in the form of a turning electrical motor, on the shaft of which there is a cantilever eccentric with a ball bearing. On the sliding valve there is a groove for interaction with the bearing and the shaft sealed with a reinforced sealing ring.

EFFECT: the invention ensures increased efficiency of the hydraulic distributor operation.

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