SU1355757A1 - Plunger pump - Google Patents

Abstract

The invention makes it possible to simplify the design and increase the durability of the piston lip seal. The cylindrical guides are made in the form of a single 16 sleeve 8 with coaxial borings of different diameters for mounting the crosshead and plunger 7 guiding surfaces. The cuffs 17 and 18 are installed on the shank 16 of the plunger, and the check valve 20 is placed in the cavity of the screw 19. Leaks from the working chamber ( RC) 15, arising during the injection stroke, accumulate in the cuff chamber 21, from where they return to the RC during suction stroke due to vacuum in the RC through channels 22. 2 Il. 7 ((L 15 -yyy-g 7 20 22 2f and Fig. 2 with SP ate SP 13

Description

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The invention relates to pump engineering, in particular to plunger pumps.

The purpose of the invention is to simplify the design and increase the durability of the plunger lip seal.

FIG. 1 shows a constructive diagram of the pump; in fig. 2 is a section A-A in FIG. one.

The plunger pump contains a detachable body 1, a valve block 2 placed in the body 1 of a reciprocating drive mechanism, including at water 3 and eccentric 4 shafts, a connecting rod 5, a crosshead 6, made in one piece with the plunger 7, a cylindrical guide, made in the form of a single sleeve 8 with coaxial borings of different diameters for mounting the guiding surfaces of the crosshead b and the plunger 7. The connecting rod 5 is connected to the crosshead 6 with a finger 9 with a liner 10. The valve block 2 is equipped with a suction And and pump The airy 12 valves and located suction 13 and discharge 14 collectors. The valve unit 2 is flanged to the end of the sleeve 8 to form the working chamber 5. Plunger 7 is equipped with a circuit shank 16 with grooves for installing sealing cuffs 7 and 18 and attached to the end of the plunger 7 by means of a hollow screw 19 with an integrated check valve 20 that opens in the direction of the working measures 15. Cuffs 17 and 18 are installed in the grooves of the shank 16 to form an inter-socket chamber 21, which is connected by channels 22 through a check valve 20 to the working chamber 15 to return the leaks during the suction stroke. The pump has a system of forced lubrication of friction steam, including a cavity 23 in housing 1, common to all cylinders, filled with lubricating fluid and connected by channels 24 to the lubrication zone of each crosshead 6. In the area where cavity 23 is located, pressure tank 25 is attached to housing 1 the cavity of the bore of the larger diameter of one of the sleeves 8.

The pump works as follows.

is pressed into the discharge manifold 14. During the pumping stroke, possible leaks from the working chamber 15 accumulate in the intermantage chamber 21, from where they are returned to the working chamber 15 through the intake stroke 15 through channels 22 through the check valve 20.

The pump friction steam is lubricated as follows.

When reciprocating the crossheads 6, the cavity of the bore of a larger diameter of each sleeve 8 periodically changes its volume, while the lubricating fluid through the channels 24 and the strip 23 of the housing 1 flows from the cavity of the sleeve 8 with a decreasing volume into the cavity of the other sleeve 8, the volume of which increases , carried out the lubrication of the friction steam pairs plunger 7 - sleeve 8 and crosshead 6 - sleeve 8. Filling lubricant 20 and controlling its level is carried out with the help of a tank 25. The remaining friction pairs are lubricated by splashing lubricant scheys stroke in the cavity of the body 1, is carried emym elements mechanism reciprocation.

25

Claims (1)

Invention Formula A plunger pump comprising a housing .jg with a reciprocating drive mechanism housed therein, including plunger and crosshead mounted in cylindrical guides and interconnected plunger and crosshead having different diameters, sealing plug assembly 35 incorporating cuffs mounted in grooves to form an inter-chamber chamber communicated with the pump working chamber by means of channels with a non-return valve installed with the possibility of opening the working chamber in the direction of the return valve to leak at the suction stroke, forced lubrication system friction pairs comprising a common cavity for all the cylinders in the housing. filled with lubricating fluid and the channels connected with the zone When the eccentric shaft 4 rotates, 45 greases of each crosshead, differing the crank 5 interacts with the crosshead 6 and reciprocates the plunger 7 with the shank 16. The reciprocating movement of the plunger 7 leads to a periodic increase (suction stroke) and a decrease (injection stroke) of the working chamber 15. At the suction stroke the pumped medium from the suction manifold 13 through the suction valve 11 fills the working chamber 15. At the pumping stroke, we pump over, in order to simplify the design and increase the durability of the plunger lip seal, Rulers are made in the form of a single sleeve with coaxial boring of different diameters 50 to install guide surfaces made at the same time the whole of the plunger and crosshead, the plunger is equipped with a removable shank with grooves and channels fixed with a hollow screw on the plunger end facing the working chamber , wherein The vae medium from the working chamber 15 through 55 cuffs is installed on the shank, and the pressure valve 12 by the plunger 7 is the return valve located in the screw cavity. is pressed into the discharge manifold 14. At the pumping stroke, possible leaks from the working chamber 15 are accumulated in the intermantage chamber 21, from where they are returned to the working chamber 15 through the suction stroke due to being placed in the working chamber 15 through the channels 22. The pump friction steam is lubricated as follows. When reciprocating the crossheads 6, the cavity of the bore of a larger diameter of each sleeve 8 periodically changes its volume, while the lubricating fluid through the channels 24 and the strip 23 of the housing 1 flows from the cavity of the sleeve 8 with a decreasing volume into the cavity of the other sleeve 8, the volume of which increases , carried out the lubrication of the friction coupler plunger 7 - the sleeve 8 and the crosshead 6 - the sleeve 8. Filling the lubricant and controlling its level is carried out with the help of a tank 25. The remaining pairs of the friction are lubricated by splashing the lubricant in the cavity of the housing 1, implemented by the elements of the reciprocating mechanism. Invention Formula five A plunger pump comprising a housing .jg with a reciprocating drive mechanism housed therein, including plunger and crosshead mounted in cylindrical guides and interconnected plunger and crosshead having different diameters, sealing plug assembly 35 incorporating cuffs mounted in grooves to form an inter-chamber chamber communicated with the pump working chamber by means of channels with a non-return valve installed with the possibility of opening the working chamber in the direction of the return valve to leak at the suction stroke, forced lubrication system friction pairs comprising a common cavity for all the cylinders in the housing. filled with lubricating fluid and the channels connected with the zone By the fact that, in order to simplify the design and increase the durability of the piston lip seal, the cylindrical guides are made in the form of a single sleeve with coaxial borings of different diameters for mounting the guide surfaces, which are integral with the whole of the plunger and crosshead, and have a detachable shank with grooves channels, fastened with a hollow screw on the plunger end facing the working chamber, while  55 cuffs are mounted on the shank, and the check valve is placed in the cavity of the screw. go