SU994814A1 - Hydraulic booster - Google Patents

Description

(54) WATER POWER SUPPLY

one

The invention relates to hydraulics and can be used in high-speed hydraulic actuators of various machines, such as machine tools and industrial robots.

A hydraulic booster is known, comprising a series-connected driver and a spool mounted in a movable sleeve spring-loaded on both sides, having a central window for communicating with the supply line and a window for connecting to the drain and cavities of the hydraulic engine and housed in the housing with the formation of end valves. associated with the cavity of the hydraulic motor 1.

A disadvantage of the known hydraulic booster is the low response rate due to the presence in all modes of operation of a deep pressure feedback.

The aim of the invention is to increase speed.

This goal is achieved by the fact that in a hydraulic booster containing a serially connected driver and a spool mounted in a movable sleeve spring-loaded on both sides, having a central window for communicating with the power line and a hydraulic engine cavity and located in the housing with the formation of end chambers connected to the cavities of the hydraulic engine, the sleeve is made of three successively installed bushings, in the middle of which,

5 fixedly mounted in the housing, the central window is made, and the outer bushes are mounted with the possibility of axial movement and with the formation of control chambers between the bushes, each

10 is connected to one of the windows for communication with the cavities of the hydraulic engine, and are provided with restrictions for their movement.

The drawing shows a diagram of the hydraulic booster.

Claims (1)

The hydraulic booster contains a J5 successively connected driver, made for example in the form of an electromechanical transducer 1 and the element “nozzle-flap 2, spool 3 installed in a spring-loaded springs 4 and 5 of a sub 20 sleeve, made of three successively installed sleeves 6, 7 and 8. In the middle sleeve 7, fixedly mounted in the housing 9, a central window 10 is made for communication with the power supply line 11. In the extreme sleeves 6 and 8, installed with the possibility of axial movement, there are windows 12 and 13, respectively, to drain away and windows 14 and 15, respectively, to communicate with cavities 16 and 17 of the hydro-Big 18. End chambers 19 and 9 are formed in housing 9 20, in which tol-catels 21 and 22 are installed to interact with sleeves 6 and 8, the chamber 19 being connected to the cavity 16, and the chamber 20 to the cavity 17 of the hydraulic motor 18. Between the sleeves 6 and 7, 7 and 8 are formed control chambers 23 and 24, the camera 23 being connected to the window 14, and the camera 2 to the window 15. The bushings 6 and 7 are equipped with They are 25 and 26 moving, fixed in the housing 9. The hydraulic motor is connected to the control object 27. Power works as follows. Under the action of the control signal passing through the electromechanical transducer 1 and the element "nozzle-flap 2, the valve 3 is moved to the appropriate value. In this case, in the windows 14 and 15, a pressure differential AP occurs, under the action of which the hydraulic motor 18 operates. In the predetermined range, for example, at AP (0.7 -. 0.8) Pn, the sleeves 6 and 8 are in the initial position, which is determined by the appropriate choice of springs 4, 5 and the diameter of the pushers 21, 22, which ensures the flow-through operation of spool 3, when part of the working fluid from hydrolyium 11 goes to discharge through spool 3 and, therefore, there is a linear change in the differential pressure of the LR in the cavity 16 and 17 in a wide range of regulation. And in the case of 4P XO, 7-0.8) RP, corresponding to the matching mode in position to the corresponding angles of the adjustment object 27, the sleeve 6 (or 8) is mixed to the extreme position defined by the stops 25, 26, and the spool from the flow turning into non-flowing, as the window 12 (or 13) overlaps and all the feed liquid from the hydroline 11 of the feed enters the hydraulic motor 18, the speed of which increases accordingly. When the input signal on the electromechanical converter is turned off, the spool 3 and bushings 6 and 8 return to their original position, and the hydraulic motor 18 stops. Thus, in one hydraulic booster, two modes of different characteristics are achieved: force or torque control and ensuring high speed in accuracy when operating in position matching modes. The use of hydraulic boosters in hydraulic drives of various machines will increase their speed and, thus, the efficiency of their use. An invention of a power booster comprising a sequentially linked driver and a spool mounted in a movable sleeve spring-loaded on both sides, having a central window for communicating with the power supply line and a window for communicating with the drain and the hydraulic motor cavity and placed in the housing to form end chambers associated with a hydraulic motor cavity, characterized in that, in order to improve speed, the sleeve is made of three successively installed bushings, in the middle of which, fixedly In the housing, a central window is made, and the outer bushes are mounted with the possibility of axial movement and with the formation of control chambers between the bushes, each of which is connected to one of the windows for communication with the hydraulic motor cavity, and are limited by their movement. Sources of information taken into account during the examination 1. USSR Author's Certificate No. 817326, cl. F 15 V 3/00, 1979.