RU188847U1 - CENTRIFUGAL PUMP WITH FLAT HORIZONTAL BODY CONNECTOR - Google Patents

Abstract

The invention relates to centrifugal pumps with a flat horizontal connector of the housing and can be used to create oil main pumps. In the housing there is an annular centering bore 10 communicated with the annular groove 7, in which the fixed ring 11 is installed, the centrifugal wheel 2 is provided with an annular band 3, forming an annular radial slit seal 15 that separates the high pressure cavity P, behind the wheel and the low pressure cavity P before the wheel. The groove is made with such a width that A second additional ring 13 is installed with an emphasis on the fixed ring. The second ring is connected to the fixed ring by means of a device for moving one ring relative to another along the plane of contact of the rings, and the slotted radial seal 15 of the wheel is formed between the opening surface of the second ring 13 and the surface of the tire 3. The device for moving is made in the form of a visor 16 at the same time integral with one of the two rings, for example, at the same time with a fixed ring 11. The visor 16 with a radial clearance 17 covers the second ring 13 and in it are made (see Fig. 2) through holes 18 and through threaded holes 19, with threaded pusher screws 20 screwed into the latter, with parts 21 protruding from the visor into the second ring 13. The smooth holes 18 accommodate tightening screws 22, 27, 28 protruding from the visor the threaded ends 23 of which are screwed into the threaded holes 24 , at Executed in the second ring. Screw the clamping screws 22 into the second ring 13, create a gap 15 of Zz by attracting the second ring 13 to the visor 16, and with the probe 26 check the value "Z" of the gap 15 at the upper point of the bandage. Then tighten the screws 27 and 28 to the right and to the left and adjust the required amount of Z, Z, Zzazraz 15. With all actions with coupling screws 22 and pusher screws 20, which are also located above the plane 6 of the connector with the upper part 4 of the pump casing removed, work on adjusting the gap values Z , Z, z, z at several points but not having the displacement of the shaft. 2 hp f-ly, 2 ill.

Description

The invention relates to centrifugal pumps with a flat horizontal housing connector and can be used to create oil main and oil support pumps.

A centrifugal oil pump is known that contains the lower and upper parts with a ring groove and an annular centering (landing) groove, which holds a protective ring that forms an inlet cavity with the annular bandage of a centrifugal wheel fastened together with studs with nuts. a centrifugal wheel and a pumping cavity, in which a centrifugal wheel mounted on a shaft is placed, a shaft mounted on bearings in housings that are made separately o from the parts of the pump casing and fastened to the lower part of the pump casing by means of a semicircular flange, in the holes of which threaded elements are installed, for example, in the form of studs (see, for example, Maljushenko V.V. Dynamic Pumps, Atlas, M., Mechanical Engineering, 1984, page 55, Fig. 142).

To improve the efficiency of the pump, the radial clearance in the gap seal between the hole in the protective ring and the outer diameter of the shroud in the centrifugal wheel should be minimal. However, the pump manufacturing technology is such that often when assembling a pump it turns out that this gap is distributed unevenly around the circumference of the ring, so with a nominal clearance of 0.3 mm per radius, for example, on one side, the band touches the ring (the gap is zero), and on the opposite side, this gap is 0.6 mm. But the touch is unacceptable, since the destruction of the seal (ring or band) and the pump is possible, since the band rotates with the wheel.

Increasing the gap over 0.3 mm, for example, to 0.5 mm, you can eliminate the touch, but this will reduce the efficiency of the pump.

In a well-known pump, they proceed in this way: they create an assembly unit that includes two bearing housings made separately from the pump casing and connected to it by a flanged connector with studs and nuts. The assembly unit also includes bearings mounted in two bearing housings, a shaft with a centrifugal wheel and a protective ring mounted on the band.

Next, the entire rotor is moved together with the bearing housings relative to the lower part of the pump casing until an acceptable degree of unevenness of the gap between the protective rings and the centrifugal wheel bandage is reached (see, for example, Maljushenko VV, Dynamic Pumps, Atlas, M., Mashinostroenie, 1984 , page 55, fig. 142, paragraph 3 of the technical requirements).

Known design is complicated due to the fact that it is necessary to make special bearing housings with mounting flanges. It is necessary to provide devices in the form of pushers (weld them to the pump casing), it is necessary to drill holes for pins fixing the position of each bearing housing after centering the rotor. This is a disadvantage of the known construction.

The utility model aims to simplify the design of the pump and technology to ensure a uniform circumferential gap in the seal between the bandage and the opening of the protective ring.

The technical result is achieved by the fact that in a centrifugal pump with a flat horizontal housing connector comprising a housing of upper and lower parts fastened together, in which an annular centering bore is provided, communicating with an annular groove in which at least one of the ends is flat, in the bore there is a fixed ring provided with a flat end, a shaft and a centrifugal wheel equipped with an annular bandage forming an annular radial slotted seal separating the high-pressure cavity After the wheel and the low pressure cavity in front of the wheel, the annular groove is made with such a width that between the end of the stationary ring and the end of the annular groove there is a second ring with a flat end mounted with an emphasis on the end of the stationary ring; in the plane of contact of the ends of the rings, while both rings are connected to each other using a device for moving one ring relative to the other along the plane of contact then AEC and slotted wheel radial seal is formed between the surface of the second orifice ring and shroud wheel surface.

The device for movement is made in the form of an arcuate visor on the outer surface of one of the rings, with a radial clearance covering the other ring, two types of holes are made in the visor - smooth through and through threaded holes in which the pusher screws are installed, abutting with the incoming sections in the other ring, and in the smooth holes are installed the tightening screws with the head, the threaded sections of the tightening screws are screwed into the threaded holes made in the ring, in which the pusher screws rest, and The zyrek is made only on one of two rings, for example, on a fixed ring.

At the same time, the smooth and threaded holes in the visor are made in the part of the visor that protrudes from the lower part of the pump casing above the plane of the connector.

FIG. 1 and 2 are longitudinal and transverse sections of the proposed pump, where:

1 - shaft

2 - centrifugal impeller

3 - bandage

4 - the upper part of the body (cover)

5 - the lower part of the body

6 - horizontal connector

7 - annular groove

8, 9, 12, 14 - flat ends

10 - centering bore

11 - fixed ring

13 - the second, additional ring

15, 17 - annular radial clearance

16 - arched visor

18 - smooth hole

19, 24 - threaded holes

20 - screw pusher

21 - protruding part of the screw-pusher

22, 27, 28 - coupling screw

23 threaded screw end

25 - washer

26 - test leads

P ₁ , P ₂ - cavity

Z ₁ , Z ₂ , Z ₃ , Z ₄ - the size of the gaps.

The pump contains a shaft 1, on which a centrifugal working wheel 2 is mounted, equipped with a bandage 3 mounted on bearings (not shown) in the pump housing, including the upper 4 and lower 5 parts, fastened together with studs and nuts (studs and nuts are not shown) and forming flat horizontal connector 6, located in a horizontal plane parallel to the axis of the shaft. A sealing gasket made of paronite laid between parts 4 and 5 of the housing is not shown. In jointly fastened parts 4 and 5 there is an annular groove 7 with ends 8 and 9, of which at least one end, for example, end 8, is flat, and centering boring 10, in which a fixed ring 11 is installed with an emphasis on the end 9 of the groove. The stationary ring 11 is made with a flat end 12, in the groove between the two flat ends 12 and 8 placed the second, additional ring 13, touching the end 14 of the end 12 of the fixed ring forming a gap 15 with a bandage 3 of a radial gap seal that separates the high pressure cavity P ₁ beyond the centrifugal the impeller and the cavity P ₂ low pressure in front of the impeller.

The manufacturing techniques of the diameter of the centering bore, the diameters for bearings in pump housings with a horizontal connector are such that the Δ ₁ and Δ ₂ offsets in the fixed ring and the outer diameter of the tire differ by 0.5 ... 1.2 mm and more, therefore the fixed ring is used for a slit radial seal of the impeller separating the cavities P ₁ and P ₂ in the pump is not possible without a shift of the shaft with the bearing housing relative to the fixed ring.

In order not to move the shaft, in the proposed utility model, an additional ring is mounted in the annular groove 7 so as to move relative to the end face 12 of contact between the ends of the fixed and second 13 additional rings, and the rings are then connected to each other using a device for moving the second ring 13 relative to the fixed ring 11 in the direction perpendicular to the axis of rotation of the shaft 1 (wheel 2), which is made in the form of an arched visor 16 at the same time integer with one of two rings, for example, with a fixed ring Tzom 11, for example in the form of an annular brim, which increases the rigidity of the rings and simplifying the manufacture of the ring 11.

A visor 16 with a radial clearance 17 covers the second ring 13 and there are two (see FIG. 2) types of through holes directed through the wheel axis: through smooth holes 18 and through threaded holes 19, with the screw screws-pushers 20 screwed in protruding from the visor parts 21 into the second ring 13. In the smooth holes 18 are placed the locking screws 22, the threaded end protruding from the visor (part) 23 of which is screwed into the threaded holes 24 made in the second ring. The profiled washers 25 are placed under the heads of the locking screws 22.

The second additional ring 13 under the force of the weight of this ring will drop down until it comes into contact with the surface of the band 3. Screw the captive screws 22 into the second ring 13, create a gap 15 of Z ₁ size, due to the attraction of the second ring 13 to the peak 16, and with the probe 26 check the value of "Z ₁ " gap 15 at the top of the bandage.

Then tighten the clamping screws 22, 27 and 22, 28 on the right and left and adjust the required value of Z ₂ , Z ₃ and Z ₄ gap 15.

To eliminate the backlash of the ring 13 due to gaps in the thread of the clamping screws 22 and the holes 24 for them with the help of pusher screws 20, they create tension in the threaded connections - and in the connections of the pusher screws with the threaded holes into which they are screwed. The locking of all screws from unscrewing can be done with glue.

Since the visor is located above the plane of the connector, for all operations with clamping screws and pusher screws, which are also located above the plane of the connector with the upper part 4 of the pump casing removed, all work on setting the gap size Z ₁ , Z ₂ , Z ₃ , Z ₄ (uniform gap 15) at several points can be performed without moving the shaft together with the bearings (bearings not shown).

Claims (3)

1. Centrifugal pump with a flat horizontal connector housing, comprising a housing of the upper and lower parts, fastened together, in which is made an annular centering bore communicated with an annular groove in which at least one of the ends is made flat, mounted in the bore fixed ring, equipped with a flat end, shaft and centrifugal wheel, equipped with an annular bandage, forming an annular radial gap seal that separates the high-pressure cavity behind the wheel and the low-pressure cavity per unit wheel, characterized in that the annular groove is made with such a width that between the end of the stationary ring and the end of the annular groove there is a second ring with a flat end mounted with an emphasis on the end of the stationary ring, the second ring is mounted for movement relative to the stationary ring in the plane of contact the ends of the rings, while both rings are connected to each other using a device for moving one ring relative to another along the plane of contact between the ends, and the slot radial th wheel seal is formed between the surface of the second orifice ring and shroud wheel surface. 2. A centrifugal pump with a flat horizontal connector housing according to claim 1, characterized in that the device for moving is made in the form of an arched visor on the outer surface of one of the rings, with a radial clearance covering the other ring, in the visor there are two types of holes - through and smooth through-threaded holes, in which screws-pushers are installed in threaded holes, resting with protruding sections in another ring, and tightening screws with head are installed in smooth holes, threaded sections ivayuschih screws screwed into threaded holes formed in the ring to which the bolts abut-pushers, wherein the visor is formed on only one of the two rings, for example, on the stationary ring. 3. A centrifugal pump with a flat horizontal housing connector under item 1, characterized in that the smooth and threaded holes in the visor are made in the part of the visor that protrudes from the bottom of the pump housing above the plane of the connector.

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