JPS59711B2 - multiple pump - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is a multiplex pump having a plurality of coaxially arranged pump units having a common drive shaft, the first pump unit of these pump units having a radial piston. A radial piston pump is constructed as a pump, and has a piston that moves in a cylinder bore in a cylinder body and sucks in and discharges pressure medium, and the discharge of the pressure medium takes place via a control member. The control member of the first pump unit, in this case manufactured as a radial piston pump, is manufactured as a cylindrical control pin, on which the cylinder body is rotatably supported. and in which a shaft section for driving a pump unit subsequent to said first pump unit extends through a control pin of said first pump unit.

The aim of the invention is to improve multiple pumps between nuclear power plants so that different pump units can be driven in as simple a manner as possible.

To achieve this object, the invention provides that a second pump unit is also arranged on the same control pin and is non-rotatably connected to the cylinder body of the first pump unit. It is constructed as a radial piston pump with a cylindrical body, to which a third pump unit is connected, which pumps through the common control pin. It is driven by an extending shaft that is non-rotatably coupled to the drive shaft.

According to this format, the structure is compact and 1. A multiple pump that is extremely simple to drive is obtained.

The invention will now be explained with reference to the illustrated embodiment.

The multiplex pump has a central housing 10 which is closed on one side by a housing cover 11 and on the other side by a flange 12.

A cylindrical widening 13 is provided in the casing 10, in which a double radial piston pump 14 is arranged.

The casing 10 is further provided with a stepped hole 15 passing through the center thereof, and this stepped hole 15 is provided with the widened portion 13 described above.

A control pin 16 is immovably arranged in this stepped hole 15 .

The double radial piston pump 14 has a cylinder body 17 which has two rows of cylinder holes 18, 19 arranged in a star pattern, these cylinders t+, 1s, i9 Pistons 20 and 21 are arranged so as to be able to slide inside without any gaps.

These pistons 20, 21 are supported via sliding shoes 22, 23 on a cam ring 24, which is also arranged in the widening 13.

In order to adjust the stroke of the pistons 20, 210, the cam ring 24 can be adjusted within the widening 13 to vary its eccentricity relative to the cylinder body 17.

Adjustment devices for this cam ring 24 are known and are therefore not shown.

The cam ring 24 is driven via a drive shaft 25 and a clutch plate 26.

, the drive shaft 25 is a double ball bearing 2 of the casing cover 11.
It is bearing on 7.

Control holes 28, 29, 30° 31 are provided in the control pin 16, and these control holes 28° 29, 30, 31
serves for the inflow and outflow of pressure medium into and out of the cylinder bore 18.19.

These control holes 28, 29, 30, 31 are connected to the control pin 16.
It opens into a plurality of longitudinally extending passageways provided therein, two of which are shown, 32 and 33.

A passage 34 provided in the casing 10 enters the passage 32.
35 is open, and the casing 10 enters the other passage 33.
A passageway 36, also provided therein, opens therein.

Through this passage 36 the double radial piston pump 14
A pressure medium is supplied to the passages 34 and 35.
The liquid is then discharged to a consumer (not shown).

A longitudinal hole 37 is provided in the control pin 16 and passed through it by a shaft 38 .

This shaft 38 is mounted non-rotatably in a bore 39 of the drive shaft 25 and is journaled in a sliding bearing 40 of the flange 12.

The shaft 38 projects beyond the casing 10 and extends into the pump casing 41.

A hollow chamber 42 is arranged in this pump casing 41 and is closed off by a cover 43.

Inside the hollow chamber 42, the rotor 44 of the vane pump is attached to the shaft 38.
are unrotatably connected.

Vanes (not shown) of this vane pump projecting from a rotor 44 slide on the inner surface of a cam ring 45, and the eccentricity of this cam ring 45 with respect to the rotor 44 can be adjusted.

The supply and discharge of pressure medium to and from the vane pump takes place via holes 46,47 in the cover 43.

The pump casing 41 of the vane pump is bolted to the flange 12, and the flange 12 itself is attached to the casing 1.
It is fixed at 0.

The control pin 16 may be fabricated by casting or may be fabricated by machining or drilling.

2a to 2e are cross-sectional views of the control pin 16 manufactured by casting, taken along lines Ia to IIe in FIG. 1, respectively.

3a to 3e are sectional views corresponding to lines IIa to Ile in FIG. 1, respectively, of the control pin 16 manufactured by machining, with holes not shown.

The operation of multiple pumps is basically known and will not be described in detail.

When the drive shaft 25 starts rotating, the cylinder body 17 also rotates via the clutch plate 26, and furthermore, the rotor 44 of the vane pump is driven via the shaft 38 which is non-rotatably connected to the drive shaft 25.

During the travel stroke, the piston 20 , 21 sucks in pressure medium via the channel 36 and the channel provided longitudinally in the control pin 16 , for example via the channel 33 and the control holes 30 , 31 .

When the piston 20.21 moves inwards, the sucked-in pressure medium passes through the control hole 28.29 and a passage provided longitudinally in the control pin 16, for example a passage 32, into a passage 34, 35. It is discharged.

These channels 34,35 are each connected to a separate consumer.

At the same time, the vane pump also sucks in pressure medium via bore 47 and discharges this pressure medium via bore 46 to the third consumer.

In this way, it is possible to supply pressure medium to a large number of consumers, such as, for example, the working cylinder of a hydraulic excavator, the running gear and the swing drive motor.

In this embodiment, the maximum single drive torque of the adjustable vane pump is less than the maximum drive torque of the dual radial piston pump 14.

Additional related nuclear power plant patent No. 1131441 (Special Publication No. 57-23
No. 108) is a multiple pump having a plurality of coaxially arranged pump units having one common drive shaft, the first of these pump units being manufactured as a radial piston pump. This radial piston pump has a piston that moves in stroke in a cylinder hole of a cylinder body to suck in and discharge a pressure medium, and the pressure medium is discharged via a control member. , the control member of the first pump unit, which is manufactured as a radial piston pump, is manufactured as a cylindrical control pin, on which the cylinder body is rotatably supported; It was characterized in that a subsection for driving a pump element unit following the first pump unit extends through the control pin of said first pump unit.

The object of the invention, on the other hand, is to improve the multiple pumps between nuclear power plants so that different pump units can be driven in the simplest possible manner.

The present invention is a multiple pump having a plurality of coaxially arranged pump units having a common drive shaft, the first of these pump units being constructed as a radial piston pump, This radial piston pump has a piston that moves in a cylinder bore in a cylinder body to suck in and discharge pressure medium, and discharge of the pressure medium is performed via a control member, in which case the radial The control element of the first pump unit, which is manufactured as a piston pump, is manufactured as a cylindrical control pin, on which the cylinder body is rotatably mounted, and A subsection for driving a pump unit subsequent to the first pump unit extends through the control pin of the first pump unit, characterized in that the second pump unit The unit is also constructed as a radial piston pump, with a cylinder body arranged on the same control pin and non-rotatably connected to the cylinder body of the first pump unit; A third pump unit is connected to the pump unit, the third pump unit being driven by a shaft extending through the common control pin and non-rotatably coupled to the drive shaft. It lies in being done.

Therefore, the essential parts of the structure between nuclear power plants are
Since it forms an essential part of the structure of the present invention,
The present invention satisfies the requirements for an additional patent under Article 31, Paragraph 1 of the Patent Law.

[Brief explanation of drawings]

FIG. 1 is a vertical sectional view of a multiplex pump according to an embodiment of the present invention, and FIGS. 2a, 2b, 2c, and 2d. Figure 2e shows line IIa and line lb in Figure 1, respectively. FIGS. 3a, 3b, 3c, and 3d are cross-sectional views of the control pin along lines mc, Ild, and Ile; FIGS. FIG. 3e shows the I of FIG. 1 of the control pins of the second embodiment, respectively.
FIG. 3 is a cross-sectional view corresponding to the LA line, the NB line, the LC line, the LID line, and the Ife line. 10... Casing, 11... Casing cover,
12...flange, 13...expansion part, 14...2
Heavy radial piston pump, 15...Stepped hole, 16
... Control pin, 1γ... Cylinder body, 18, 19.
... Cylinder hole, 20, 21 ... Piston, 22, 2
3... Sliding shoe, 24, 25... Cam ring, 2
5... Drive shaft, 26... Clutch plate, 27... Ball bearing, 2B, 29° 30.31... Control hole, 32,3
3, 34, 35° 36... Passage, 31... Vertical hole, 38... Axis, 39° 46.4γ... Hole, 40...
・Sliding bearing, 41...Pump casing, 42...
Hollow chamber, 43...cover, 44...rotor.

Claims (1)

[Claims] 1. A multiplex pump having a plurality of coaxially arranged pump units having a common drive shaft, the first of these pump units being manufactured as a radial piston pump and the radial A piston pump has a piston that performs stroke movement in a cylinder hole of a cylinder body to suck in and discharge a pressure medium, and discharge of the pressure medium is performed via a control member. In this case, it is called a radial piston pump. The control member of the manufactured first pump unit is manufactured as a cylindrical control pin, and the cylinder body is rotatably supported on the cylindrical control pin, and the control member of the first pump unit is manufactured as a cylindrical control pin. of the type in which the shaft section for driving the pump unit following the unit extends through the control pin of said first pump unit;
The pump unit is also constructed as a radial piston pump with a cylinder body arranged on the same control pin 16 and non-rotatably connected to the cylinder body of the first pump unit. , connected to these pump units is a third pump unit, which extends through said common control pin 16 and is non-rotatably coupled to said drive shaft 25. A multiplex pump characterized in that it is driven by a shaft 38 that is