JPS58167891A - Rotary vane pump - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

BACKGROUND AND OVERVIEW OF THE INVENTION The present invention relates to rotary vane pumps, and more particularly to systems for constructing rotary vane pumps.

There are various types and sizes of rotary vane pumps. And different housings and different parts are used for each type and size of pump. 9 Significant cost savings could be achieved if it were possible, at least in part, to use identical components for different types and sizes of pumps.

It is therefore an object of the present invention to provide a series of rotary vane pump designs based on one basic type and covering a wide range of uses by the exchange of structural assemblies.

To this end, the nine-turn vane pump is divided into six major subassemblies, each of which can be contained in two separate casings with a pair of cooperating sealing surfaces, each pair of which is of standard form.

The concept of the invention applies to directly driven pumps (i.e. pumps driven in the axial direction of the shaft) and 1 in which the various elements are used in different types of pumps. Only indirectly driven pumps (i.e. pumps driven by means 9 parallel to their axis, e.g. V-belts or gear transmissions) and tanks which are flange-connected to the pump or are located at a remote location. It also makes it possible to combine accessory units (eg additional radial piston pumps) as well as pumps with different delivery volumes. With the device indicated in the preamble of the invention, the larger unit number of elements and especially the housing parts that can be achieved makes it possible to expect a reduction in the cost of nine individual pumps.

A fuller understanding of the invention can be obtained from consideration of the following description and claims taken in conjunction with the accompanying drawings.

DETAILED DESCRIPTION The rotary vane pump (see FIG. 1) consists of six main assemblies: a pumping assembly, a drive assembly, and a hydraulic fluid supply assembly. Each of the second class assemblies is a separate housing part or casing.

For more details, see main casing 10. Shaft installation is in casing 2
0 and a supply casing 30. The rotary vane pump has an axis designated 4-4; radially of the main casing 10, both external and seen from each casing - a further radially extending sealing surface 21 of the sink 20;
extend perpendicularly to said axis 4-4 and are closely aligned with each other. A further outer sealing surface 12 extending parallel to the axis of the pump and cooperating with the sealing surface 31 of the supply casing 30 is provided on the main casing 1o.

An annular groove 2 into which a sealing 26 is installed
2 is applied to the sealing surface 21. Similarly, the sealing surface 6
1 has an annular groove 62 for receiving a sealing ring 331. The main casing 10 has mutually communicating chambers 13 and 14 which are arranged concentrically with respect to the pump shaft @4-4. The assembly including cam ring 15 and rotor 16 as well as pressure plate 17 is mounted within said chamber 16. The rotor has an outer cylindrical surface (not shown).

It has a lateral first surface 16'a as well as a second lateral surface 16b. The rotor has a radially extending groove in which the blades are placed and guided for movement.

The cam ring 15 has an oval shape surrounding the rotor 16 and the blades so that a pot-shaped working space is formed.
0val) has an inner surface of the form.

A flow control valve 18, which may also possibly include a pilot relief valve (not shown), is arranged in the chamber 14. The main gauging, whose only upwardly extending portions are illustrated as a pair of supply passage sections 19, also has passage means for supplying and discharging the fluid.

Their axes are arranged in a radial plane parallel to the rotor surface 16a at a distance greater than the thickness of the pressure plate 17. The lower end of the supply passage portion 19 is a flow control valve 1B.
It extends to the left and right of the pump and communicates with an L-shaped passage leading to the inlet hole of the working chamber of the pump (EP-A-oo6s
oss provides further details of the layout of the passageway and is incorporated into the dead area for reference).

It has a stepped hole 24 for inserting a shaft seal 26. The shaft 27 is provided with a swivel 28 at one end. On the other hand, at the other end, a key slot (not shown) is arranged which engages a corresponding hole in the rotor 16 for driving the rotor. Attachment flanges 29 may generally be provided on the casing 20 for tightening and tightening the rotary pump. The rotary wheel 28 extends along the axis (4-4) and serves to engage a shaft which may be part of a press, for example. Due to the mutually aligned axes, the drive arrangement is referred to as a direct drive. Only one bearing means 25 is required since the shaft 27 is subjected to virtually no hemostatic force due to such a direct drive.

FIG. 2 shows a shaft mounting casing 40 for the indirect drive of a shaft 41 which is equipped with a belt pulley 42 at its outer end and which can be driven by a V-belt. Alternatively, when the drive and drive arrangement is used, the shaft 41
is subjected to a bending moment. And for this purpose the device has 2
It has two bearings 44 and 45.

The radially outer sealing surface 21 corresponds to that shown in FIG. And therefore there is no need to describe it in great detail. As is well known, it is concerned with the supply and discharge of hydraulic fluid and therefore, as in FIG. Arcuate grooves 46 and 47 are located inside the annular groove 22.

Figure 6 shows two recessed parts 5 that take a shaft 53 with a cam 54.
1 and 52, another embodiment of the shaft mounting casing 50 is shown. A series of holes 55, which are covered by screw caps 56, lead to the cam or eccentric 54. A perforated piston is placed in each hole 55 for accommodating a spring that presses against the cap 56. Supply and discharge passages (not shown), in which are also arranged check valves, are provided in said housing part 51. and one of them is designated '57. The device forms two originally known radial piston pumps which are used specifically for leveling vehicles.

Figure 4 shows a cavity or chamber 1 with a larger axial length.
3' indicates another embodiment of the main casing 10 which differs slightly from the embodiment shown in FIG. Cam ring 1
It will be appreciated that 5' and rotor 16' are of correspondingly wider construction, while pressure plate 17 and flow control valve 18 can be employed without modification. The radially outer sealing surface 11 and the outer sealing surface 12 extending parallel to the pump axis correspond to the embodiment shown in FIG.

In FIG. 1, the supply casing 30 is in the form of a tank housing for standard volumes. The device is located in the storage chamber 34
and a filter chamber 35. The return of the fluid circuit then leads to the filter chamber 65. Threaded holes 36 are provided for fixing the filter.

FIG. 5 shows the tank housing 60 from below. It will be seen that there are two threaded holes 67 and an elongated groove or hole 38 on the inside of the outer sealing surface 61 extending parallel to the axis of the pump. The holes 67 are provided for fastening the tank housing 30 to the main casing 10 by means of screws. The holes 68 open into a pair of perforated supply passages 19 which are arranged parallel to each other and at a suitable distance from each other. The length of the grooves in the holes 68 is longer than the spacing thereof.

As can be seen from Figures 1 and 5, the standard tank has holes 6
It is asymmetrical with respect to 8. It will be appreciated that the asymmetrical shape can be modified according to special requirements and symmetrical tanks can also be used. If a larger capacity tank is required, the storage area 54 is used.
will be Qo increased in width and height. Ti-cast aluminum, resin materials or sheet metal should be considered as suitable materials for the walls of the tank.

Sometimes it is required that the tank and pump be located separately from each other. To meet this requirement, an adapter 60 (see Figure 6) is provided as part of the supply casing. The adapter 60 has a feed screw fitting 61 leading into a hole 68. The lower side of the adapter corresponds to the sealing surface 61 shown in FIG.

Modification of the pump assembly 1 makes it possible to manufacture rotary vane pumps of different sizes. And in this respect, the casing 10°, the cam ring 15 and the rotor 1
It is essentially only necessary to change the axial length of 6. This is possible without allowing cavitation because the hydraulic fluid is supplied from both sides of the rotor. By flanging different drive assemblies 2 to the pump assembly, it is therefore possible to produce different types of pumps (direct drive versus two indirect drives,
or with an additional radial piston pump). The series of pump types can be further increased by changing the shape 9 and size of the tank assembly 8. This allows the device to be adapted to the prevailing conditions of the site.

Instead of the outer sealing surfaces 12 and 31 being arranged parallel to the pump axis, such surfaces can also extend at an oblique angle with respect to the axis 4-4. In either case, the sealing surfaces 12 and 31 are arranged non-parallel to both the axial and radial positions of the rotor-cam ring arrangement. When viewed from a plane including the axis of the supply passage portion 19, the axis 4
The radial distance of the inclined sealing surface 12 from -4 is the axis &! 4-4 is greater than the radial extension of the cam ring 150 from 4-4. And the axial distance of the inclined surface 12 from the first side 16a of the rotor 16 is greater than the axial extension of the pressure plate 17. Many changes may be made to the invention described above without departing from the spirit of the invention and the scope of the appended claims. What is to be done will be obvious to those skilled in the art.

[Brief explanation of the drawing]

FIG. 1 shows a sectional view of a direct drive rotary vane pump. Figure 2 shows the shaft mounting of an indirectly driven rotary vane pump on the casing. FIG. 6 shows a shaft-mounted casing with an additional radial piston pump. FIG. 4 shows the main casing of a pump with a larger pump flow rate. Figure 5 shows the tank casing viewed from below. And FIG. 6 shows the adapter. [Explanation of symbols of main parts] Fig. 1 4-4-0・・・・・・・・・・・・Rotor axis 1o・・・・・・・・・・・・・・・・・・...Main casing 11 ...... First radially extending surface 12 of main casing ...... ...Second sealing surface 13 of main casing...First cavity 14...・・・・・・Second cavity 15・・・・・・・・・・・・・・・・・・Cam ring 16,・・・・・・・・・・・・・・・・・・Drum-shaped rotor 1-6a......First surface 16b of rotor...Second surface of rotatable rotor 17...... Pressure plate 19... Supply passage 20... ......The shaft rest is on the casing 21.The shaft rest is on the first radially extending surface 23 of the casing.・・・・・・・・・・・・・・・・Seal ring (sealing means) 25・・・・・・・・・・・・・・・
・・・Bearing 27・・・・・・・・・・・・・・・・・・
・Shaft 60...... Supply casing 61... Second sealing surface 66 of the supply casing・・・・・・・・・・・・・・・Seal ring (sealing means) 34.55・・・・・・・・・Fourth cavity 3B・
・・・・・・・・・・・・・・・・・・Enlarged hole (opening) Fig. 2 40・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・Extended hole (opening) Fig. 2 40 Casing 41・・・・・・・・・・・・・・・Axle 44.45・・・・・・・・・Bearing is shown in Fig. 6 50・・・・・・・・・......The shaft is installed in the casing 51, 52...The shaft is installed in the two parts of the casing 53... ...Axis 54...
・・・・・・・・・・・・・・・Cam Fig. 4 10′・・・・・・・・・・・・・・・・・・Main casing 15′・・・・・・・・・・・・・・・・・・Cam ring 16′・・・・・・・・・・・・・・・Rotor 17・・・・・・・・・・・・・・・・・・・Pressure plate Fig. 5 60 ・・・・・・・・・・・・・・・Supply housing 68 ・・・・・・・・・・・・・・・・ Enlargement Hole Figure 6 61... Second sealing surface 38 Enlargement Hole 60・・・・・・・・・・・・・・・Adapter FIG, 3

Claims (1)

[Claims] 1. A drum-shaped rotor having a cylindrical outer surface on the outer periphery and first and second surfaces perpendicular to the cylindrical surface, defining an axis and a radial direction perpendicular thereto; a rotor of the type having radially extending grooves and vanes guided so as to be able to slide therein; surrounding said rotor on its outer periphery - (' - having pal-shaped segments and said cylindrical surface; and a cam ring leaving a pot-shaped space between the inner surface and the inner surface; a pressure plate covering the rotor on the first surface; and a shaft connected to the rotor in connection with the drive. Valve means for flowing fluid into and from the square space of the front handle using a valve; passage means for supplying said fluid into and from the square space of the front handle; and said valve. A system comprising a rotary pump comprising: a housing having means; said housing comprising: a main casing; a shaft mounting comprising a casing and a feed casing; the main casing receiving said rotor, said cam ring and said pressure plate; a first cavity for receiving the valve means, a second cavity for receiving the valve means, and a supply passageway portion forming part of the passageway means and generally extending in the radial direction; the casing has a fourth cavity for receiving fluid and an opening communicating with the supply passageway portion; the main casing and the shaft mounting each having a first radially extending surface and the radially extending surface; each of the main casing and the supply casing having sealing means between the bottom surfaces extending to the bottom surface thereof, and screw means for connecting and compressing the casings together, the main casing and the shaft mounting for sealing said first cavity; the main casing has a second sealing surface extending substantially parallel to the axial direction and intersected by the supply passage portion and the opening, respectively; a first surface of the rotor disposed at a radial distance from the rotor axis that is greater than a radial extension of the cam ring; said sealing means being inserted between said main casing and said feed casing Ω said second sealing surface, while threaded means connecting said main casing as well as said feed casing together; pressing; the system further constituting the rotary pump includes: types of main casings having different lengths in the axial direction of the first cavity and the rotor; different numbers of bearing means and different lengths of the shafts; A system constituting a rotary pump, characterized in that the installation includes a type of casing and a type of the supply casing with different volumes of the fourth cavity. 2. System according to claim 1. The shaft installation is characterized in that the casing contains an additional radial piston pump driven by the shaft.
consisting of two parts. 5. A system according to claim 1. wherein said supply casing includes an adapter comprising said second sealing surface and connected to said fourth cavity through piping means. 4. A system according to claim 1. provided therein a pair of feed passages parallel to each other and arranged in radial planes with their axes generally parallel to the first surface of said rotor. 5. A system according to claim 4. wherein said second sealing surface of said supply casing has an elongated hole connecting said pair of supply passage sections.