CN100516558C

CN100516558C - Rotatary brake valve

Info

Publication number: CN100516558C
Application number: CNB200610052117XA
Authority: CN
Inventors: 刘富良; 李新
Original assignee: Individual
Current assignee: Ningbo Jiangbei Yuzhou Hydraulic Equipment Factory
Priority date: 2006-06-23
Filing date: 2006-06-23
Publication date: 2009-07-22
Anticipated expiration: 2026-06-23
Also published as: CN101092980A

Abstract

This invention relates to a rotary brake valve characterizing in molding motor mouths MA and MB connecting a motor, external oil orifices VA and VB and a return one T, installing single-way valves of positive and negative among VA, MA and T, in which an overflow valve with a pilot valve is set between MA and T, a small hole N3 of a spring cavity of the pilot valve is connected with the upper hole of VB, single-way valves are set among VB, MB and T positively and negatively, an overflow valve with a pilot valve is set between motor orifice MB and return orifice T, and small hole N4 of the spring cavity of the pilot valve is connected with the upper small hole of VA.

Description

Rotatary brake valve

Technical field

The present invention relates to a kind of Rotatary brake valve.

Background technique

Rotatary brake valve is a valve commonly used on the hydraulics, being widely used in engineering machinery vehicles such as truck crane, crawler crane gets on the bus and uses in the control of revolution action, as number of patent application is the Chinese patent " a kind of hydraulic shovel rotary system of recyclable braking energy " of CN90216151.2, this system is provided with the rotary motor oil that drives turntable, the hydraulicchange-over valve of control rotary motor oil sense of rotation and dump pump and prime mover that power is provided to system.It is characterized in that also being provided with the recovery and the regenerative circuit of turntable braking energy, accumulator and rotary motor oil are in parallel, and the Pilot operated check valve of having connected between the oil transport pipeline of accumulator and rotary motor oil, the Pilot operated check valve of having connected between the oil transport pipeline of accumulator and rotary motor oil, the control oil channel of Pilot operated check valve is in parallel with the control oil channel of hydraulicchange-over valve, the control oil channel of Pilot operated check valve is in parallel with the control oil channel of hydraulicchange-over valve, unloading valve is in parallel with two oil transport pipelines of hydraulicchange-over valve respectively, the control oil channel of unloading valve all communicates with accumulator, the Pilot operated check valve of having connected between the oil transport pipeline of hydraulicchange-over valve and the oil transport pipeline of rotary motor oil, the Pilot operated check valve of having connected between the oil transport pipeline of hydraulicchange-over valve and the oil transport pipeline of rotary motor oil, during rotary braking, the kinetic energy of turntable is converted into hydraulic pressure and can charges into accumulator and carry out energy recovery, during the turntable starting, initial stage discharges the energy single driving reclaimed and the oil pump off-load by accumulator, when the pressure of accumulator drops to the set pressure that is lower than unloading valve, oil pump and accumulator drive jointly, evidence: this system can save energy 30%, its defective is: volume ratio is bigger, and the revolution stationarity also needs further raising.

Summary of the invention

Technical problem to be solved by this invention provides a kind of compact structure, the good Rotatary brake valve of revolution stationarity.

The present invention solves the problems of the technologies described above the technological scheme that is adopted: a kind of Rotatary brake valve, it includes valve body and the one-way valve that is installed in the valve body, it is characterized in that forming on the valve body motor mouth MA, MB, outer oil-collecting hole VA, VB and the oil return inlet T that connects motor, from hydraulic fluid port VA between motor mouth MA and the oil return inlet T respectively forward be connected to second one-way valve and oppositely be connected to first one-way valve, be connected to first relief valve with first pilot valve between motor mouth MA and the oil return inlet T, the spring chamber aperture of wherein controlling the action of first pilot valve is communicated with the last aperture of hydraulic fluid port VB; From hydraulic fluid port VB between motor mouth MB and the oil return inlet T respectively forward be connected to the 4th one-way valve and oppositely be connected to the 3rd one-way valve, be connected to second relief valve with second pilot valve between motor mouth MB and the oil return inlet T, the spring chamber aperture of wherein controlling the action of second pilot valve is communicated with the last aperture of hydraulic fluid port VA.

As improvement, be connected to solenoid valve between described motor mouth MA, the MB, it makes hydraulic mechanism can realize the technical ability of freely trackslipping, and the mechanism center is overlapped automatically with the center of gravity of weight, effectively protects crane gear.

Also can improve, be connected to shuttle valve between described outer oil-collecting hole VA, the VB, make Rotatary brake valve offer the slewing gear brake pressure oil-source automatically, make the swirl gear action to open break by the selection of shuttle valve.

The improvement that is highly profitable is, described first one-way valve, second one-way valve, be distributed in the left side layer of valve body with first relief valve of first pilot valve, and the 3rd one-way valve, the 4th one-way valve, be distributed in the right layer of valve body with second relief valve of second pilot valve, about layer symmetric design, be convenient to make and use.

At last, the adjusting bolt of described first one-way valve, second one-way valve, the 3rd one-way valve, the 4th one-way valve is arranged on the surface of valve body, is convenient to regulate use.

Compared with prior art, the invention has the advantages that: compact structure, the revolution stationarity good, under the particularly improvement situation; can realize the technical ability of freely trackslipping of swirl gear, protect crane gear effectively, and can prevent the suction sky of motor; structure is more reasonable, is convenient to make and use.

Description of drawings

Fig. 1 is the hydraulic schematic diagram of Rotatary brake valve;

Fig. 2 is the side direction view of Rotatary brake valve;

Fig. 3 is that the C-C of Fig. 2 is to sectional view;

Fig. 4 is that the B-B of Fig. 2 is to sectional view;

Fig. 5 is the pressure-flow plotted curve;

Fig. 6 freely turns round schematic representation.

Embodiment

Embodiment describes in further detail the present invention below in conjunction with accompanying drawing.

As schematically shown in Figure 1, a kind of Rotatary brake valve, it includes valve body 11 and first one-way valve 1 that is installed in the valve body, second one-way valve 2, the 3rd one-way valve 7, the 4th one-way valve 8, the crucial part of its invention is to form on the valve body 11 the motor mouth MA that connects motor, MB, outer oil-collecting hole VA, VB and oil return inlet T, from outer oil-collecting hole VA to forward first one-way valve 1 that is connected to second one-way valve 2 and oppositely connects respectively between motor mouth MA and the oil return inlet T, be connected to first relief valve 4 with first pilot valve 3 between motor mouth MA and the oil return inlet T, the spring chamber aperture N3 that wherein controls 3 actions of first pilot valve goes up aperture N2 with hydraulic fluid port VB and is communicated with; From hydraulic fluid port VB between motor mouth MB and the oil return inlet T respectively forward be connected to the 4th one-way valve 8 and oppositely be connected to the 3rd one-way valve 7, be connected to second relief valve 10 with second pilot valve 9 between motor mouth MB and the oil return inlet T, the spring chamber aperture N4 that wherein controls 9 actions of second pilot valve goes up aperture N1 with hydraulic fluid port VA and is communicated with.And first one-way valve 1, second one-way valve 2, are the left side layers that are distributed in valve body with first relief valve 4 of first pilot valve 3, and the 3rd one-way valve 7, the 4th one-way valve 8, are the right layers that are distributed in valve body with second relief valve 10 of second pilot valve 9, about layer present symmetric design.Be connected to shuttle valve 5 between outer oil-collecting hole VA, the VB.Between side of valve body motor mouth MA, MB, be connected to solenoid valve 6.The adjusting bolt of last first one-way valve 1, second one-way valve 2, the 3rd one-way valve 7, the 4th one-way valve 8 is arranged on the surface of valve body 11, is convenient to regulate use.

Its working principle is such, when hydraulic fluid port VA incoming pressure oil, first one-way valve 1 is closed, second one-way valve 2 is opened, then motor mouth MA oil-feed, pressure oil enters first relief valve 4 simultaneously, because first relief valve, 4 annular active areas are very little, can not make the relief valve length of spring compressed, therefore outer oil-collecting hole VA and motor mouth MA pressure begin to rise, pressure rising along with outer oil-collecting hole VA, the pressure of aperture N1 also rises synchronously and passes to aperture N4, make the spring chamber build-up pressure of second pilot valve 9 and promote the spool that guide rod is opened second relief valve 10, this moment, the high pressure that passes through second relief valve 10 of rotary motor MB oil pocket was opened adding T mouth, made system finally realize the high voltage startup rotary motor.Because high pressure is created in the oil circuit of motor operations, the pressure oil that enters motor mouth MA from outer oil-collecting hole VA improves the revolution stationarity at the high back pressure of motor oil circuit MB generation greatly.When outer oil-collecting hole VA pressure reduced gradually, second relief valve 10 cut out gradually, and pressure also reduces gradually, up to braking fully, had promptly realized the low pressure braking.When control valve returned meta, second one-way valve 2, the 4th one-way valve 8 and trainstop were closed, and swirl gear is reliably braked.Because Rotatary brake valve is divided into the two-layer and complete symmetry in the left and right sides, and the adjustment of force value is in full accord with structure, and is therefore identical when the working condition of swirl gear and VA oil-feed when outer oil-collecting hole VB incoming pressure is oily.The wherein effect of shuttle valve, in the time of outer oil-collecting hole VA and VB incoming pressure oil, the selection by shuttle valve offers the slewing gear brake pressure oil-source automatically, makes the swirl gear action to open break.Solenoid valve 6 is under the no electric circuit state; motor mouth MA, MB oil circuit are linked up; motor mouth MA and MB have the loop of one's own; when external control is opened trainstop; just realized swirl gear free skating favourable turn can, consequently: when there are angle in weight G and crane mechanism, in order to prevent the destruction of weight G component f in the horizontal direction to mechanism; crane mechanism can be by free skating then makes the center of gravity of mechanism center and weight G, has effectively protected crane gear.The main effect of T mouth is in the time of the in stockit is available dancing of hoist weight G in hoisting process, because having produced just, the pressure between motor mouth MA and the MB changes, caused the rotary motor rotation speed change simultaneously, be reflected in the Rotatary brake valve is changes in flow rate, and this moment the T mouth oil can open first one-way valve 1 or the 3rd one-way valve 7 adds to motor MA or MB chamber by the negative pressure that motor mouth MA or MB are produced, prevented the suction sky of motor effectively.

Claims

1. Rotatary brake valve, it includes valve body (11) and is installed in one-way valve in the valve body, it is characterized in that forming on the valve body (11) motor mouth MA, MB, outer oil-collecting hole VA, VB and the oil return inlet T that connects motor, from hydraulic fluid port VA between motor mouth MA and the oil return inlet T respectively forward be connected to second one-way valve (2) and oppositely be connected to first one-way valve (1), be connected to first relief valve (4) with first pilot valve (3) between motor mouth MA and the oil return inlet T, the spring chamber aperture (N3) of wherein controlling first pilot valve (3) action is communicated with the last aperture (N2) of hydraulic fluid port VB; From hydraulic fluid port VB between motor mouth MB and the oil return inlet T respectively forward be connected to the 4th one-way valve (8) and oppositely be connected to the 3rd one-way valve (7), be connected to second relief valve (10) with second pilot valve (9) between motor mouth MB and the oil return inlet T, the spring chamber aperture (N4) of wherein controlling second pilot valve (9) action is communicated with the last aperture (N1) of hydraulic fluid port VA.

2. Rotatary brake valve according to claim 1 is characterized in that being connected to solenoid valve (6) between described motor mouth MA, the MB.

3. Rotatary brake valve according to claim 1 and 2 is characterized in that being connected to shuttle valve (5) between described outer oil-collecting hole VA, the VB.

4. Rotatary brake valve according to claim 3, it is characterized in that described first one-way valve (1), second one-way valve (2), be distributed in the left side layer of valve body with first relief valve (4) of first pilot valve (3), and the 3rd one-way valve (7), the 4th one-way valve (8), be distributed in the right layer of valve body with second relief valve (10) of second pilot valve (9), about layer symmetric design.

5. Rotatary brake valve according to claim 4 is characterized in that the adjusting bolt of described first one-way valve (1), second one-way valve (2), the 3rd one-way valve (7), the 4th one-way valve (8) is arranged on the surface of valve body (11).