SU822769A3 - Plunger pump - Google Patents

Abstract

A housing (1) has a hollow piston (6) with a shoulder (8) approximately half way along it acting as a locating face for a spring (7) which is located at the other end by a collar (9) on a sleeve (10) around the top of the piston. The outlet port (18) at the bottom of the piston is preceded by a chamber (18) housing a spring loaded ball (4) seating in a conical depression one side of a block under the pointed end of the piston, closing a hole (13) through the block. A hole (20) of smaller diameter than the bore (5) of the piston (6) is in line with this hole (13), and the bore of the piston acts as a chamber to provide a supplementary closing force during the return stroke of the piston.

Description

one

The invention relates to pumping, in hr, to plunger pumps with valve distribution.

A plunger pump has been identified, which includes a housing with coaxially placed in the last plunger and a discharge valve, the back side of which is facing the end of the plunger, and the suction valve housing encloses the pump working chamber l

The disadvantage of this pump is that the suction valve housing is mated with its outer cylinder and with a fusible surface with the inner surface of the housing, which leads to a significant friction loss in the junction area of a large mating surface. The temperature difference between the outer and inner surfaces of the valve is caused by the presence of the specified friction losses, which increases the risk of valve seizure in the housing, thereby reducing the reliability of the pump as a whole.

The purpose of the invention is to increase the efficiency and increase the reliability of the pump

This goal is achieved by the fact that the pump’s suction valve is made

at. A bidet is movably mounted directly on the plunger of a spring-loaded sleeve, one of the ends of which is provided with a sealing lip to interact with the back side of the seat of the discharge valve, which together form a pair of shutter, and the pump casing is equipped with a fixed stop to interact with

0 with the other end of the sleeve, thereby limiting the stroke of the suction valve.

Several embodiments of the suction valve are possible. At 5 for example, 4J3 can be made of two concentrically arranged and adjoining sleeves of different lengths, one of which has a sealing lip.

0

This, in turn, provides several options for the valve, in particular, the bushings can be non-movable, for example by fitting with guaranteed tension, and the sleeve without sealing serves as a stop for the spring of the suction valve.

In addition, the sleeves can beat

Claims (5)

0 are interconnected with the possibility of relative movement, for example, by landing with a guaranteed clearance, and each of them is provided with an abutment, and the springs of the suction valve are not placed between the abutments. In this case, the sealing juice is made on the male sleeve, and the length of the female sleeve corresponds to the difference between the distance from the back side of the pressure valve seat to the fixed body stop and the minimum guaranteed clearance sufficient for assembly of the assembly, and the female sleeve is provided with radial through slots to pass the pumped medium during the suction stroke, located in the area of the gate-saddle pair. FIG. 1 shows a pump, “longitudinal section; in fig. 2 - elements forming a pair of valve-saddle suction valve; in fig. 3 and 4 embodiment, suction valve liner according to claims 2 and 3 of the claims; in FIG. 5 and 6 embodiment of the sleeve of the suction valve, according to PP.2 and 4 of the claims; in fig. 7 is a variation of the embodiment of the sleeve of the suction valve, according to p. The plunger pump comprises a housing 1, where the suction cavity 2 is made, the working fluid c. which enters through the channel 3. The suction cavity 2 through the sealing means 4 enters the plunger 5, the reciprocating movement of which the motor can be provided by any drive device (not shown), for example, a connecting rod, eccentric, etc. The splice in other lines shows the plunger 5 at the upper dead point, i.e. at the end of the stroke, injection, while its position at the bottom dead center - at the end of the suction stage is shown by nktirnymi lines. The plunger 5 is wearing a full body. One of the ends of the sleeve 6 is provided with a sealing gasket 8 for interfacing with the reverse side 9 of the seat 10 of the discharge valve 11, the valve 12 of which can be designed as ball and conic Sealing the juice in the sleeve b in conjunction with the back side 9 of the seat 10 form a pair of valve-valve suction valve, while the diameters of the flow sections of the suction and discharge valve s .vypolneny same. Kojpnyc 1 a sleep pump, a fixed stop 13 for interfacing with the other end of the sleeve b, thereby limiting the amount of axial displacement of the sleeve b during the period of the suction stroke of the pump. It is pressed to the back side 9 of the seat 10 by means of the springs 14. When the pump performs the discharge stroke, the valve 11 is open and the working fluid under pressure enters the discharge manifold .15, the lift height of the valve 11 is limited. stop 16 installed in the lid 17 of the housing 1. When moving the plunger 5 in the direction of the lower dead point, the sleeve 6 follows this movement, thereby opening the valve-suction valve pair, which ensures that the working chamber 7 is filled with the pumped medium from the suction cavity 2. When the movement of the plunger 5 in the direction of the top dead center of the sleeve 6 follows this movement and the sealing lip 8 interacts with the reverse side 9 of the seat 10, thereby sealing the working chamber 7 from the suction cavity 2. the cross section of the working chamber 7 with a diameter d, is larger than the cross sectional area of the seal over 8 and with a diameter d of the suction valve, which during the injection stroke of the plunger 5 creates additional specific pressure on the valve-seat pair, caused the sealing effect of this pair. By reducing the diameter of the mating of the suction valve body with the counter piece, the mating surface is significantly reduced, which, in turn, leads to a reduction in friction losses between pump elements, increasing its efficiency and increasing reliability, since the proposed pump significantly loses its suction valve lower than the famous. The sleeve b of the suction valve can be made of two concentrically arranged and mated sleeves 18 and 19 of different lengths, one of which, for example on the sleeve 18, has sealing lip 8. The sleeves 18 and 19 are mated between each other. stationary, for example, by fitting with guaranteed tension, while the sleeve 19 with its end 20 serves as a stop for the spring 14 of the suction valve. The sleeves 18, and 19 can be conjugated to each other With the possibility of relative movement, for example, by landing with a guaranteed clearance, and each of them is provided with a stop 21 and 22, respectively. Between the stops 21 and 22, there is a spring 14 of the suction valve, which provides preliminary compression of the sealing lip 8 to the surface of the saddle 10. When mating the sleeves with a guaranteed clearance, sealing juice 8 is made on the male sleeve 23, and the length of the female sleeve 24 corresponds to the difference between the distance from the circumferential side 9 of the seat 10 of the discharge valve to the fixed abutment of the body and the minimum guaranteed clearance sufficient for assembling the assembly, the surrounding sleeve 24 must be provided with a radial (With the help of grooves 25 for the pumping medium during the tact period: from the suction cavity 2 into the working chamber 7. The grooves 25 on the sleeve 24 are made in the zone of the pair of valve-saddle suction valve. The pump can be made with various types of discharge valve installed coaxially with the plunger, as, for example, shown in drawings, as well as, if necessary, can be equipped with accessories - FOR ensuring operation in various operating conditions. Claim 1. Plunger pump, comprising a housing with coaxially placed in the TIO follower plunger and discharge valve, the back side of the seat is facing the end of the plunger, and the suction valve housing covers the working chamber of the pump, characterized by the fact that, in order to increase efficiency and increase reliability operation of the pump, its suction valve is made in the form of a spring-loaded sleeve that is movably mounted directly on the plunger, one of the ends of which is provided with a sealing sleeve to interact with the circulating The side of the pressure valve seat, together forming the gate-saddle pair, and the 3 W / C case are equipped with a fixed stop to interact with the other end of the sleeve and thereby limit the stroke of the suction valve. 2. The POP.1 pump, characterized in that the sleeve is made of two concentrically arranged and conjugated; between each of the sleeves of different lengths, one of which is made sealing on juice. 3. Pump according to Claims 1 and 2, characterized in that the sleeves are coupled between the trash stationary, for example, by means of a fit with guaranteed tension, and the sleeve without const. It serves as a stop for the spring of the suction valve. 4. Pump according to Claims 1 and 2, characterized in that the sleeves are coupled with each other with a possibility of relative movement, for example, by landing with a guaranteed clearance, and each of them is provided with a stop, and the springs of the suction valve are displaced between the stops. 5. Pump according to Claims 1 and 4, characterized in that the sealing juice is made on the male bushing, and the length of the female bushing corresponds to the difference between the distance from the Back side of the seat of the discharge valve to the mobile body stop and a guaranteed clearance sufficient for assembly the assembly and the surrounding sleeve are provided with radial through slots for passage of the pumped medium; during the suction stroke, located in the area of the gate-saddle pairs. Sources of information taken into account in the examination 1. Acceptance of the German Federal Law O 2152956, class. 59a, 32, 1971. lO & srig.Ts /. 9 23 / U /;