KR100202163B1 - Rotary pump - Google Patents

Abstract

The present invention relates to a rotary pump (1) for a device and a unit for transferring a fluid or gas medium. The pump has a standard diameter, width and fitting relationship, which is fitted next to the matching bearing of the rolling bearing and is independent of the shaft bearing 2 so that the pump fixes the bearing position and transmits the lateral bearing force. The arrangement of the pumps and the shape of the housing and rotor may be provided for several purposes.

Description

Rotary pump

The present invention relates to a rotary pump for gear boxes and devices for the delivery of a fluid or gas medium comprising an independent housing having channels for outflow and inflow and an integral or multipart internal shaft rotor unit.

The use of positive displacement pumps, for example gear pumps, hose pumps, piston pumps, etc., of fluid static pressure of different structures for this purpose is already known. Such pumps allow for high pressure and forced circulation.

For example, no high pressure is required for the medium transfer for lubrication or cooling of the device, and centrifugal hydrodynamic rotary pumps can be used.

A disadvantage of the known configuration of such pumps is that the pumps are designed only for special purposes or require expensive device-side connections or separate drives and a correspondingly large additional assembly inside or outside the gearbox or device. It requires space.

Since the existing members of the gearbox or the device are related to the function of the pump, a structure in which a compact arrangement of the pump is achieved is known. For example, the shaft end of the device is used as the drive holder of the pump rotor (DE 30 22 418). Or the device housing is used as a support of the shaft bearing for the pump and the device and as the pump housing (DE-OS 34 17 307). However, this compact structure is not satisfactory for general use and requires a very specific structural matching of the part of the device in question.

In a known, especially compact structure, the pump is combined with a roller bearing to form one structural unit. The outer ring of the bearing simultaneously forms the pump housing so that the inner ring of the bearing forms the drive holder of the pimp rotor. While the advantage of assembling the pump at low cost with independently required device bearings, there is a disadvantage that roller bearings must be specially manufactured at high cost. Not only does it require special mass production, but it is very expensive to combine bearings of various purposes and sizes with the pump in this way.

It is therefore an object of the present invention to provide a gear for transporting a fluid or gas medium, which can be assembled into or in a gearbox or device for a variety of purposes and structural conditions with minimal additional space and low cost in a simple and compact structure. It is to provide a pump for a box and a device.

This object is achieved by a rotary pump according to claim 1.

Preferred devices or arrangements are presented in the dependent claims.

The present invention is based on the fact that a pump corresponding to the above object must be formed so that it can be assembled in a space without a pump or to a size without a pump. That is, the pump performs additional functions using existing operability to reduce the total number of additional parts or additional work in the housing of the gearbox device if possible or necessary.

The pump must be adapted to various purposes by the combination of internal designs while keeping the outer dimensions the same.

The condition according to the invention is that, in a rotary pump having a pump rotor driven by a supported shaft, arranged with an independent housing next to a shaft bearing independent of the pump, the rotary pump has a standardized configuration of the roller bearing. With a diameter, width and fitting relationship suitable for the diameter, width and fitting ratio, the housing of the rotary pump is optionally formed as a single sleeved member or with or without shaft through-holes on the opposite side of the shaft bearing. By a rotary pump formed as a sleeve-like member having a cover member which performs the cover function of the gearbox or the device.

This new arrangement and design allows the pump output to be standardized and selected and used according to the size and structure of the roller bearing for the output and purpose of the gearbox or device, compared to the use of other members standardized according to the size of the bearing. That has the advantage.

More advantageously, the rotary pump according to the invention performs the support and / or positioning functions of the roller bearings, for example in lieu of the support box or in the design of the support housing cover. The medium may be moved by the side bearings or away from it by the sealing member.

It is also possible for the hydrodynamic or hydrostatic pump characteristics to be simply formed by various shapes in the pump housing and by the use of suitable rotors, for example.

Another advantage is that the rotary pump is not used for new gearboxes or devices, but for a variety of existing gearboxes or devices without significant cost and additional configuration space. Furthermore, since the pump and the bearing can be exchanged independently of each other, the characteristics of the pump and the bearing characteristics can be freely combined inexpensively. The proper pump construction facilitates maintenance by assembling and disassembling the pump or bearing in the event of wear.

According to the invention the outer shape of the pump has a diameter suitable for the diameter of the associated roller bearing. This diameter matching means the same dimension or a slight deviation that can be adjusted by a simple support sleeve, fitting disk or sealing disk of the pump. This has the advantage that the pump does not have to exist for every bearing size, but the selected size class too enlarges the interior space or covers the assembly.

Some simple examples are shown in the figures for the inflow and outflow of media in the pump and in the associated walls of the gearbox and the device housing.

When the pump housing has a cover member formed on the opposite side of the axial bearing according to the invention, the outlet opening is passed through the cover member at the pump side without having to change the usual cover diameter assigned to the diameter of the bearing. Can be guided.

The possibility of using the pump in a very compact construction as a hydraulic brake, or for hydraulic coupling or as an engine is given by the rotary pump according to the invention.

Preferred characteristics of the pump according to the invention are shown by way of example in FIGS. 1 to 5 and are described next.

In FIG. 1 the pump 1 is mounted as a sleeved member beside the bearing 2, on the drive shaft 3 and in the unit housing 4. Hydrodynamic centrifugal pumps are shown. The centrifugal pump comprises a housing 5, a rotor 6 formed as an axially moving swing gate, and a sealing disc 7. The pump supports the lateral force of the outer bearing ring 8 by the sealing disc 7 and the pump housing 5 against the support ring 10. The pump sucks the medium through the inlet bore 11 below the device housing 4 and into the rotor 6 through the channel 12 arranged radially in the pump housing 5. The centrifugal force moves the medium through the opening 13 into the ring channel 14 and from there into the outflow channel 15 of the device housing 4. The pump 1 and the bearing 2 have the same inner diameter and outer diameter.

The pump 1 is shown in FIG. 2, the housing of which is formed of a sleeved member 5.1, which has a cover member 5.2 on the opposite side of the axial bearing 2, and the cover member 5.2. Performs the function of a gearbox cover with a shaft through hole.

The rotor 6 is formed of a wing cell rotor that moves axially and is disposed in an eccentric housing bore 19. The outflow bore 20 is guided through the cover member 5.2 of the housing. For example, the part of the housing 5 that is suitable for the bearing diameter is inserted in the bore of the unit housing 4 which is slightly larger than the outer diameter of the bearing. A slight diameter difference with respect to the supported bearing 2 connects the side sealing disk 7 of the pump 1.

3 is a cross-sectional view of FIG. 1, the difference being that a second pump 1.2 is provided next to the pump 1.1, and the housing of the pump 1.2 has a cover member 5.2 corresponding to FIG. 2. The two pumps have a homogeneous rotor, the channels of which are formed such that the delivery stream of media flows through the two pumps in turn. The arrangement before and after the pump increases the pump pressure and feed rate. The two rotors need not have the same internal structure.

4 is a cross-sectional view of two homogeneous pumps 1.1 and 1.2 corresponding to FIG. The two pumps are arranged left and right to generate suction streams in parallel through their common channels, but in parallel. The delivery stream is guided through the outlet channels 15.1 and 15.2. In contrast to FIG. 3, the inner control ring ring 9 is secured by a fitting disc 16, two rotors 6 and a shaft nut 17. In order to fix the bearing, the erroneous bearing ring 8 is additionally fixed to the conventional bearing cover 18 by two pump housings 5 and a sealing disc 7. The inner diameter of the two pumps is slightly smaller than the inner diameter of the bearing, for example. The difference in inner diameter is adjusted by the fitting disk 16.

5 shows a compact configuration of the pump 1 corresponding to FIG. 2, but with a different rotor and no shaft opening. The pump rotor 6 is formed and floated as a swing gate so that the rotor is not hindered by the inclination of the shaft end due to the deflection of the shaft and the possible deviation of the tapered roller bearing 22 shown. The rotor 6 is driven by a pin 21 inserted at the end of the supported shaft 3. The pump is compact because it does not require more space than commonly used gear box covers with support collars.

Claims (7)

A rotary pump for conveying a fluid or gas medium comprising a pump rotor arranged by a supported shaft and driven by a supported shaft, with an independent housing, wherein the rotary pump is a rotary pump. (1) has a diameter and width suitable for the diameter and width of the roller bearing to maintain the fitting relationship with the roller bearing in a standardized structure. The housing 5 of the rotary pump is optionally formed as a single sleeved member or has a cover member 5, 2 which functions as a cover of a gear box or device with or without shaft through-holes opposite the shaft bearing 2. Rotation pump, characterized in that formed as a sleeve-like member (5,1) included in. 2. The rotating pump according to claim 1, wherein the rotating pump fixes the position of the shaft bearing next to it and transmits the side bearing force of the outer bearing ring 8 through the pump housing 5, or the side bearing force of the inner bearing 9 is rotated. Rotating pump, characterized in that the transfer through (6). The rotary pump according to claim 1 or 2, wherein the rotary pumps are arranged side by side in the same structure or in different structures and in this case generate a feed stream connected in parallel or back and forth. The rotary pump according to claim 1 or 2, characterized in that the rotary pump moves the conveying medium by means of a shaft bearing (2) raised next to it. The rotary pump according to claim 1 or 2, characterized in that the sealing disc (7) prevents the transfer of the medium to the shaft bearing (2). The pump housing (5) and the rotor (6) according to claim 1 or 2 correspond to a hydrodynamic pump, for example a circulation pump, a side channel pump or a centrifugal pump with straight blades in radial direction. Rotating pump, characterized in that formed. The pump housing (5) and the rotor (6) according to claim 1 or 2, characterized in that they are formed corresponding to hydrostatic pumps, for example vane cell pumps, roller cell pumps or internal gear pumps. Rotating pump.