CN2818832Y - Rotary homogeneous main pressure distrbuting valve of adjustor of hydraulic turbine - Google Patents

Abstract

The utility model relates to a rotary pressure equalizing main pressure distributing valve of an adjustor of a hydraulic turbine. The utility model is characterized in that a rotary piston is arranged in a valve body, a pressure equalizing branch oil passage is arranged on a pressure oil passage in the valve, and thus, a pressure equalizing structure that a radial direction oil pressure composite force for a rotary piston tends to zero; N branch oil passages which are distributed in a mode of reverse symmetry correspondingly to an inlet P are arranged on the inlet P of the pressure oil passage of the valve and in the rotary piston; radial direction oil pressure areas which are opposite to the radial direction of the inlet P and are respectively bore by terminals on the rotary piston are S1, S2... Sn, a radial direction oil pressure area which is bore by the rotary piston on the P is S0, and S0=*Sn; M pressure equalizing branch oil passages which are distributed in a mode of reverse symmetry correspondingly to the inlet P and an outlet T are arranged on the inlet P and the outlet T of the pressure oil passage of the valve in a valve body, radial direction oil pressure areas which are opposite to the radial directions of the inlet P and the outlet T and are respectively bore by terminals on the rotary piston are Q1, Q2... Qm, and S0=*Qm. The utility model has the advantages that the operation of the rotary piston of the valve is agile and portable, speed can be regulated continuously, high precision components, such as an electro hydraulic servo valve, etc., are not needed, cost is low and reliability is increased.

Description

The rotary main control valve of all pressures of hydrogovernor

Technical field:

The utility model relates to the rotary main control valve of all pressures of a kind of main control valve of hydrogovernor, particularly a kind of hydrogovernor.

Background technique:

Both at home and abroad the main control valve of hydrogovernor was the sliding piston type structure in the past, promptly formed lower half portion by the main control valve piston of the stroke that takes the air line (up and down or about), fixing lining and valve body; Top hydraulic pressure enlarged portion so generally all will be made up of pilot valve and auxiliary receiver, is operated the piston of main control valve because the main power of pressing piston action of joining of operation is very big again by auxiliary receiver.Because the power of operation guide valve is less, so generally all adopt micro motor (stepper motor or actuating motor) to come the operation guide valve or come the operation guide valve by the electrohydraulic control that is output as displacement by electricity-machine conversion equipment (as ball spiral pair etc.); Also have by electro-hydraulic proportional valve output flow direct control auxiliary receiver, but this moment, the sensor special of main control valve must be set ... in a word, tradition sliding piston type main control valve is complex structure not only, particularly also must increase the high-precision parts of other routines, as electrohydraulic control or electro-hydraulic proportional valve and sensor or ball spiral pair etc.

Summary of the invention:

The purpose of this utility model is to overcome the main control valve complex structure of prior art hydrogovernor, and must be with the defective of high-precision parts, design a kind of main control valve of rotary piston structure, employing all presses oil circuit to eliminate the radial force that rotary-piston may bear in its valve, and designs simplification, running are agile.

Technical solution of the present utility model is a kind of rotary main control valve of all pressures of hydrogovernor, dress rotary-piston in the valve body, the pressure oil circuit is arranged in the valve, and valve internal pressure oil circuit is provided with and all presses branch's oil circuit, forms for the rotary-piston oil pressure equal laminated structure of making a concerted effort to go to zero radially.Valve internal pressure oil circuit for the equal laminated structure of rotary-piston is: the pressure oil circuit inlet P place at valve, in rotary-piston, be provided with branch's oil circuit that the N bar distributes to the P inversion symmetry, and terminal is born the radially oil pressure opposite with P respectively on rotary-piston area is S ₁, S ₂S _n, rotary-piston bears at the P place radially that the area of oil pressure is S ₀, $S_0=\underset{n=1}{\overset{n}{\mathrm{\Σ}}}{S}_n;$ The pressure oil circuit inlet P place of valve and outlet T place, each is provided with all pressures branch oil circuit that the M bar distributes to P, T inversion symmetry respectively in valve body, and terminal is born the radially oil pressure opposite with P, T respectively on rotary-piston area is Q ₁, Q ₂Q _m, $S_0=\underset{m=1}{\overset{M}{\mathrm{\Σ}}}{Q}_m;$ N and M are positive integer.

Description of drawings:

Fig. 1 all presses rotary main control valve structure positive view;

Fig. 2 all presses rotary main control valve structure sectional elevation (oil circuit cut-off state, rotary-piston is static);

Fig. 3 all presses rotary main control valve structure sectional elevation (rotary-piston changes an angle counterclockwise);

Fig. 4 all presses rotary main control valve structure sectional elevation (rotary-piston changes an angle clockwise);

Embodiment:

The utility model further specifies as follows in conjunction with specific embodiments referring to accompanying drawing:

A kind of rotary main control valve of all pressures of hydrogovernor, structure are made of suit rotary-piston 2 in the valve body 1 referring to accompanying drawing 1,2, in valve body 1 and the rotary-piston 2 the pressure oil circuit are arranged, referring to accompanying drawing 1,2,3,4.P is a pressure oil circuit inlet in the valve, and T is a pressure oil way outlet in the valve, and Fig. 2 is rotary-piston 2 static, oil circuit cut-off states, and the pressure oil circuit is obstructed; Fig. 3 is that rotary-piston 2 counterclockwise rotates the state of an angle, and P → B is an oil-feed oil circuit in the valve, and T → A is an oil return circuit in the valve; Fig. 4 is angle of rotary-piston 2 clockwise directions rotation, and this moment, P → A was an oil-feed oil circuit in the valve, and T → B is an oil return circuit in the valve.In the valve working procedure, turn to and the corner of rotary-piston 2 change, and can regulate.

When all pressing rotary main control valve to work, referring to accompanying drawing 2, circulating pressure oil sources 3 is sent into main control valve with pressure oil from inlet P, through valve internal pressure oil circuit,, enter the outer servomotor 4 of valve referring to accompanying drawing 3,4, turn back to main control valve again, T turns back to circulating pressure oil sources 3 from outlet.

Valve internal pressure oil circuit all has and all presses branch's oil circuit in rotary-piston 2 and in the valve body 1, forms for the rotary-piston oil pressure equal laminated structure of making a concerted effort to go to zero radially, has eliminated the suffered radially oil pressure of rotary-piston basically.

All pressures branch oil circuit in the rotary-piston 2 is: at valve internal pressure oil circuit inlet P place, be provided with 2 in the rotary-piston 2 and all press the oil circuit a of branch ₁, a ₂, referring to accompanying drawing 1, a ₁, a ₂Terminal is symmetrically distributed in the upper and lower of P reverse side, a respectively ₁, a ₂Terminal is born the radially oil pressure opposite with pressure oil inlet P on rotary-piston 2 area should be S mutually ₁, S ₂, $S_1=S_2=\frac{1}{2}{S}_0,$ S ₀Be that pressure oil circuit inlet P place rotary-piston 2 bears the radially area of oil pressure, S ₁+ S ₂=S ₀, therefore, rotary-piston 2 suffered total radially oil pressures go to zero.All press the oil circuit a of branch ₁, a ₂Formation is for the equal laminated structure of rotary-piston.

All pressures branch oil circuit in the valve body 1 is: at pressure oil circuit inlet P place and outlet T place, each is provided with 2 and all presses the oil circuit b of branch in valve body 1 ₁, b ₂And c ₁, c ₂, b ₁, b ₂Be symmetrically distributed in P reverse side upper and lower, c ₁, c ₂Be symmetrically distributed in T reverse side upper and lower, referring to accompanying drawing 1, each area that bears on rotary-piston 2 with the radially oil pressure of P, T place respective opposite of terminal is Q ₁, Q ₂, $Q_1=Q_2=\frac{1}{2}{S}_0,$ S ₀Be to bear the radially area of oil pressure on pressure oil circuit inlet P place or the outlet T place rotary-piston 2, therefore, Q ₁+ Q ₂=S ₀, owing to all press the oil circuit b of branch ₁, b ₂For the reverse upper and lower symmetry of P, c ₁, c ₂For the reverse upper and lower symmetry of T, so all press branch's oil circuit to offset for radially exerting pressure of rotary-piston 2, total radially oil pressure that rotary-piston 2 is born goes to zero.All press the oil circuit b of branch ₁, b ₂And c ₁, c ₂, form equal laminated structure for rotary-piston.

Rotary-piston is rotated forward or backwards by driven by motor, can realize that main control valve regulates continuously.

The utility model advantage is: valve internal pressure oil circuit is provided with and all presses branch's oil circuit, formation goes to zero the suffered radially oil pressure of rotary-piston, therefore for the equal laminated structure of rotary-piston, piston operation is light flexibly, and can realize continuous adjusting, the main control valve comparison with the prior art hydrogovernor does not need with electrohydraulic control or electro-hydraulic proportional valve and sensor, or special high-precision parts such as ball spiral pair, simplified structure reduces cost, and improves reliability.

Claims (2)

1, a kind of rotary main control valve of all pressures of hydrogovernor, the dress rotary-piston has the pressure oil circuit in the valve in the valve body, it is characterized in that valve internal pressure oil circuit is provided with all to press branch's oil circuit, forms for the rotary-piston oil pressure equal laminated structure of making a concerted effort to go to zero radially.

2, the rotary main control valve of all pressures of a kind of hydrogovernor according to claim 1, it is characterized in that valve internal pressure oil circuit for the equal laminated structure of rotary-piston is: at the pressure oil circuit inlet P place of valve, be provided with branch's oil circuit that the N bar distributes to the P inversion symmetry in rotary-piston, terminal is born the radially oil pressure opposite with P respectively on rotary-piston area is S ₁, S ₂S _n, rotary-piston bears at the P place radially that the area of oil pressure is S ₀, $S_0=\underset{n=1}{\overset{N}{\mathrm{\Σ}}}{S}_n;$ The pressure oil circuit inlet P place of valve and outlet T place, each is provided with all pressures branch oil circuit that the M bar distributes to P, T inversion symmetry respectively in valve body, and terminal is born the radially oil pressure opposite with P, T respectively on rotary-piston area is Q ₁, Q ₂Q _m, $S_0=\underset{m=1}{\overset{M}{\mathrm{\Σ}}}{Q}_m;$ N and M are positive integer.

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