SU1386744A1 - Gear-type pump - Google Patents

Abstract

The invention makes it possible to increase the volumetric efficiency of the pump and to control the wear of the pads. At the end of the rod 14 there is a spherical head 15, which interacts with the spherical grooves 16 of the pads 6, in the backs 17 of the radial cylindrical, the bores 8 of the body i are windows 18 and 19, and in the body. io. 18 {22. / 7 9 SL с с 00 CD 4 ;; 4 .. o, tff.l

Description

l Opole 1 grooves 20. Ko.polki uspn-oleyyy in the grooves 20 with the formation of additional cavities 21 clamp, connected to the Poolego 13 pumping | and. The cavity, 9 presses are connected by | through window 18 and the check valve 22 ti by cavity 21, and the sensor 11 of the pressure of the alarm device 10 is utmost a - from the window 19 ”The working fluid stays in cavity 9 and is tightly pressed. to the pn.rina.nbihM i surface of the gears, But as far as the block is concerned, the piston 7 is mixed, with some premature wear, the window 19 opens and the sensor 11 is connected to the cavity 9. At the same time, a signal is received from the sensor to the wear limit indicator 1C. , f-ly, 3 ill.

one . . The invention relates to

to construction, in particular to gear

asosam.

The purpose of the invention is to increase

high efficiency and wear control

Oles,

Fig. 1 shows a gear pump with a limit wear indicator and a pressure sensor, cross section; Fig. 2 is the same with a device for measuring pads wear, cross section; FIG. 3 is the same with a linear displacement sensor, transverse section.

The gear pump comprises a housing 1, in cylindrical bores 2 of which gears 3 of external engagement are located with trunnions 4 mounted in slide bearings 5 and pads 6 made of antifriction alloy, mated on one side to pistons 7 mounted in radial cylindrical the bores 8 of the housing 1 to form the piston cavities 9 of the clamp, the wear limit alarm 10 with the pressure sensor 11 and the suction cavity 12 and discharge 13, with the piston 7 provided with a rod 14 with a spherical head 15 at its end, In the body of the pads 6, spherical grooves 16 are made to interact with the spherical head 15, in the walls 17 of the radial cylindrical bores 8 of the housing 1 there are windows 18 and 19, and in the case 1 there are additional grooves 20, and the pad 6 is installed in the additional grooves 20 to form 21 additional cavities connected to the cavity

five

five

 ABOUT

0 5 0

13, the piston cavity 9 of the clamp is connected through the window 18 and the check valve 22 to the additional cavity 21 of the clamp, and the pressure sensor 11 of the wear limit indicator 10 is connected to the window 19, and, in addition, the gear pump can be equipped with a device 23 for measuring the wear of the shoes 6 with a linear displacement sensor 24, and a piston 7 with an expanding ring 25 with an inclined manhole 26 installed in the piston bore 27 of the piston 7, with the movable element 28 of the linear displacement sensor 24 being mounted to interact with the surface 29 inclined groove: 26,

The gear pump works as follows.

When the gears 3 rotate, the working fluid is captured by the teeth of the gears 3 from the suction cavity 12 into the injection cavity 13. At the same time, the working fluid from the injection cavity 13 enters the additional pressure cavities 21 and then through the check valves 22 into the piston cavities 9 and tightly presses the block 6 to the outer radial surface of the gears 3. As the pads wear out, the piston 7 moves and, with some limiting wear of the pads .6, the window 19 opens, the pressure sensor 11 is connected to the piston cavity 9, and from the pressure sensor 11 Signal is sent to the limit wear alarm 10

When installing the device 23 for measuring the wear of the pads 6 as they are worn, the piston 7 moves

and moves podgtzhny element 28 of the sensor 24 linear displacements. At the same time, the signal from the linear displacement sensor, proportional to the amount of wear of the pads 6, enters the device 23, in which, after processing in the form of

information is displayed on the indicator,

I

Claims (2)

1. A gear pump comprising a housing, in cylindrical bores of which external gears with spindles mounted in slide bearings are placed, and pads made of antifriction alloy, coupled on one side with pistons mounted in radial cylindrical bores of the housing with formation of piston cavities clamping, and suction and discharge cavities, that is, so that, in order to increase volumetric efficiency and control of pad wear, it is equipped with a limit wear and sensor indicator com pressure h pbrshen rod is provided with a sphere five 0 five A spherical grooves for engaging with a spherical head are made in the body of the pads; two windows are in the walls of the radial cylindrical bores of the body, and additional grooves are in the body; additional pads are formed in additional grooves with the formation of additional pressure cavities connected the pressure cavity, the piston pressure cavity is connected through one of the windows and the non-return valve with the additional pressure cavity, and the pressure sensor of the wear limit indicator is connected to the second by the window, 2. A pump according to claim 1, characterized in that. It is equipped with a .dl wear measurement device with a linear displacement sensor. The scientific research institute, and the piston - an expanding ring with an inclined groove installed in the annular groove of the piston, the movable element of the sensor, linear displacements installed with the possibility of interaction with the surface of the inclined groove. 29 9 J8 fy .3 18