SU920654A2 - Pressure regulator - Google Patents

Description

one

The invention relates to pneumatics and is intended for use in pneumatic systems of vehicles with different pressure ranges for adjusting the limits with maximum accuracy, adjusting and setting the necessary range of them in the production process.

According to the main author. ev No. 826295 a pressure regulator is known, comprising a housing with lids in which a diaphragm loaded with a setpoint springs and connected to one end of the stem is installed, and an unloading valve associated with a spring-loaded poppet valve, furthermore, has a hollow piston associated with the unloading valve in which a spring-loaded disc valve connected to the second end of the stem placed with a gap in the central opening of the hollow piston and a filter mounted in the housing concentric to the hollow piston nude The movement of the hollow piston is carried out by the action of compressed air in the working cavity on the elastic membrane.

The equilibrium equation of all forces acting on the hollow piston is known, namely

(R -PH) OM z-h N + Np.o.,

where RK is the pressure in the working cavity of the actuator at which the hollow piston makes a stroke equal to h;

P is the pressure in the working cavity of the actuator, at which the movement of the hollow piston begins;

RE - effective membrane area;

ten

Z - stiffness of adjustable springs;

h - the piston stroke of the actuator corresponding to the pressure P;

NT - friction force;

Np.o-force of static and dynamic non-blocking of the valve device.

From the equation it follows that the stroke of the hollow piston is

NT + NP.O.

but

h (Rk - RN

Z

20

The value is -t. cause an absolute mismatch of the course of DB.

The value (P - Pc) is the calculated stroke of the piston (membrane) hp without taking into account the effect of the mismatch of the stroke A h.

The magnitude of the misalignment of the DN stroke depends on a number of factors, in particular, the quality of parts manufacturing and product assembly, as can be seen from the formula, is individual for each pressure regulator. Owing to this, the calculated move does not coincide with the real one. Each controller requires an individual setting in the production process.

When calculating the adjustable springs, the range of control limits of the pressure regulator and the diaphragm stroke (piston stroke) are taken into account. For this limit of adjustment, the design spring has a certain stiffness that ensures a certain membrane stroke. In order to provide the calculated parameters, the pressure regulator parameters me.mbg should have no speed, equal to the calculated speed hp. From the kinematics of the known and given pressure regulators, the calculation; the first move of the membrane1-: you can express, ka ;,

hp X - a, where X is the gap in the clan device;

but. a constant value for the design of the pressure regulator, which is limited by the passage throughput section of the inlet of the channel of the actuator of the executive mechanism.

To operate the pressure regulator within the limits of regulation1; and ;. corresponding to the calculated, the gap in the valve device in each particular,:; d;) remission is different and (x corresponds to the pac40THON v to the membrane stroke in (} with the force of friction and 6oKOoi ix us1: 1; 1H. achieve the calculated limits of adjusting the regulator ;; pressure by onre; 1g of the year 10; 1 of the gap in the valve line | 1 |

A disadvantage of the known pressure regulation / curtain is the lack of the possibility of setting the optimum; P) No value of the pin in the clan gun device:; (Lactic values) of the mismatch of Ah, individual; 1) K) for each regulation) a. In addition, the nHHec HaH design does not allow us to set the required ranges of limits pei-yji ip (; Lwi;,.

The aim of the invention is Ho.iivijruKe precision and compres- sion of the regulator.

The specified p. irio p ul toror; and 1 in the corpus mouth ;. iojT.-e-fK Rbova regulrokro15 ;; chng krpika. sa / pa; on with the sleeve in which it is made; Sd.k: razfuz {) chchnogo valve.

The drawing shows the following: - pressure regulator to be used.

The pressure regulator contains a housing 1, an upper housing 2 and a membrane 3, 1 exchangeable between them and loaded with adjustable springs 4 and 5. The membrane 3 is tightly connected to the norm 6, which has an axial and radial hole and interacts with an IM valve with a safety valve 7, which interconnects (x works with the upper end of the rod 8. The lower end of the P1 current 8 abuts the torei, the disc valve 9 is preloaded with a spring; {} through the hole And made with holes. To adjust the springs 4 to 5 and There is a top cover 12. In Lij1-; narrow q.chanan 13 with a hollow piston 14, iodzhi-i and uruzhi i ii5. The poppet k.lapan 9 alternately contacts the end of the rod 8 and the saddle of the unloading k.lapan 13, connectors and;: Atmosphere. The distance from the torus ai1) Chaty valve 9 to its unloading valve 13, denoted by xy-cut X, in, is indicated by: a gap. In the lower part of the internal surface of the housing 1 of the installation of the 1-st. 1. 1 setting device, perform 1nos in the form of 16 si1.1f.fn; ak BiDicTvi: (MG and; curb adjuster; n-1ro: i) ; 18 with a groove, rigidly connected to each other. On the sleeve 16 there is a Celdo 2C, a contact of 01p, it is with an unL1) solenoid line Pgr. Zocheng go k, aPa1-1a 13.

On par1 / h1; iy 1:, on the BTyjiisH surface of the BTyjiisH, the groove for the sealer is made} 1st lo. 21.

In the snout of the cortex, an ibrack clip is set to 22 and n tuier 23. For 0: I (compressed nose ;; from the third hour THII. UfiyTpji coaxed filter 24. When assembling re; ---, l then | a lav. le: 1 and adjustment 1: i8 is repeated in the body; up to the time:; lopeii of the groove of the case J, us. l; -1 in 1 l, thereby maximizing the gap, for example, loo, relieving the other cop 2.5.

i ropsss iUiCTDOKK-; lrec.l of control of rs; ul: then:) and D1l - / / cn P1stvlya p.1sd} op1; formed angry;

Sns-th in (; h:; xn: kthl; ate in injection; lcho n (.;, 1st; re; u. Torus pressure. Passes through -fnid.p 2i, depressing check valve 22: i d. Next P1: |; e, zolnoy1) Stage B by the union 23 will be inserted into the space system. P v KjiiibiO R.: Shney adjustment () voshn (. 1Y; j; biL: H 2 poi: DDS; d:; pci.; irov (; 1 timed lugip 1 i:.; la davlishnye triggered danzanik on single X1; d, t v. Not: lavlen; -: s, (hkpvetstchu; :) a;:;; d) —tossy klaiiaHi;.:, ;;: contact with him, an anomi regus ;; yrovochi) and .iy ;; io. oi chtm gp-yuis: - ;:) issue ;. ;). air ii at:, osfera, m iio v; g; 1 esso) is idling. Reverse clan 22 and that time is closed. Further, the issue of a pneumathe1) sz drosse.l from an injeurist MjjL reduces the pressure of I1c in the year of the membrane dispensary. When you reach; .: 1 effects, its response to pressure VC. not pumped up, discharge clutch; ; 3 C.-zhoyats.

If the unloading valve 13 closes at a pressure below the desired adjustment limit (inflation pressure), the lower adjustment cap 18 is unscrewed, while the poppet valve 9, the rod 8, the safety valve 7 and the piston 6 remain stationary, and the unloading valve 13 under the action of the sleeve 16, rigidly attached to the lid 18, is lowered. The clearance X in the valve arrangement is reduced. The value of the lower control limit rises. The upper limit of adjustment (actuation at idle speed) is adjusted by adjusting the springs 4 and 5 with the help of the upper adjusting cap 2.

Using two or three consecutive pressures of the pressure regulator, we install by means of the lower adjustment cover 18 and the sleeve 16, which are rigidly connected to each other with a pin 19, the optimum clearance X, at which the pressure regulator operating parameters are achieved with the required accuracy. By adjusting the gap x, it is possible to obtain a range change to the required control limits. When the thread pitch of the lower adjustment cap 18, for example, 1.5 mm and turning it by 5 °, the gap changes by 0.02 mm, which is comparable with the size of the necessary gap adjustment.

The use of this pressure regulator allows you to set the optimum gap size in the valve device, taking into account the actual magnitude of the displacement of the actuator Db for each controller in the process of testing and adjustment, regardless of the instability of the stiffness of the adjustable springs used and other factors of manufacturing and assembly the presence of friction, lateral forces on the piston, etc.), and also ensures that the ranges of control limits are set during production, depending on the requirements ovans of consumers. The effectiveness of the design of the pressure regulator is to improve the manufacturability of the product and to obtain the specified operating parameters, regardless of the instability of the stiffness of the applied power springs and other factors that influence the magnitude of the mismatch of the actuator ia.

Claims (1)

Invention Formula Pressure Regulator by Aut. St. 826295, characterized in that, in order to increase the accuracy of the adjustment of the regulator, an adjusting cap is installed in its housing, which is connected to the sleeve in which the relief valve seat is made. Sources of information taken into account in the examination 1. USSR author's certificate Kho 826295, cl. G 05 D 16/06, 1979 (prototype). P eleven w