Patent US4650349A successfully refreshed from Google Patents.
Patent US3894429A successfully refreshed from Google Patents.
US3894429A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Noise checking installation for two rotating and interengaging gears
Assignee: Rheinmetall Air Defence AG
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Filing: 1974-07-22
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Granted: 1975-07-15
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Expires: 1994-07-22
Abstract
Abstract A noise checking installation for two rotating and interengaging gears at a gear testing machine at which the gears are displaceable relative to one another in the direction of their axes of rotation. Elements are provided for measuring the sound in liquid as a function of the axial displacement of the gears for a predetermined meshing frequency of the gears and for a predetermined rotational moment and which elements are connected with hydrostatic bearings of the shafts carrying the gears.
Inventors
- 👤 Erhard Konersmann
- 👤 Rudolf Gruber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:39
CPC Classifications
G; G01; G01M; G01M13/00; G01M13/02; G01M13/028; G01M13/021
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
104 words
A noise checking installation for two rotating and interengaging gears at a gear testing machine, each of said gears having a shaft, means for mounting said gears to be displaceable relative to one another in the direction of their axes of rotation, said mounting means for the gears including hydrostatic bearings provided for the gear shafts, means for measuring the liquid noise as a function of axial displacement of the gears for a given meshing frequency of the gears and for a given rotational moment, and means for operatively connecting the measuring means with the hydrostatic bearings of said shafts which carry the gears.
Claim 2
Dependent Claim
104 words
A noise checking installation for two rotating and interengaging gears at a gear testing machine, each of said gears having a shaft, means for mounting said gears to be displaceable relative to one another in the direction of their axes of rotation, said mounting means for the gears including hydrostatic bearings provided for the gear shafts, means for measuring the liquid noise as a function of axial displacement of the gears for a given meshing frequency of the gears and for a given rotational moment, and means for operatively connecting the measuring means with the hydrostatic bearings of said shafts which carry the gears.
Claim 3
Dependent Claim
80 words
The noise checking installation as defined in claim 1, wherein said measuring means comprises a differential pressure transmitter equipped with two compartments, a diaphragm for separating said two compartments from one another, said hydrostatic bearings incorporating a hydrostatic radial bearing provided for at least one shaft carrying one of the gears, said hydrostatic radial bearing being equipped with pressure oil pockets situated approximately diametrically opposite one another, and means for connecting each compartment with one of said pressure oil pockets.
Claim 4
Dependent Claim
32 words
The noise checking installation as defined in claim 2, further including an electrical measurement value transmitter operatively connected with said diaphragm and serving to convert oscillations of the diaphragm into electrical signals.
Claim 5
Dependent Claim
99 words
The noise checking installation as defined in claim 1, wherein said mounting means for at least one of said shafts carrying the associated gear comprises a housing, said hydrostatic bearings incorporating two hydrostatic axial bearings for mounting said housing to be axially displaceable, a substantially ring-shaped piston provided for each hydrostatic axial bearing, said ring-shaped pistons being equipped with ring-shaped pressure oil pockets between the housing and said ring-shaped pistons, means including a servo valve for the axial displacement of said at least one shaft, and conduit means for operatively connecting said pressure oil pockets with said servo valve.
Claim 6
Dependent Claim
38 words
The noise checking installation as defined in claim 4, further including a control element for controlling the axial displacement of said at least one shaft, said servo valve being connected via an amplifier means with said control element.
Claim 7
Dependent Claim
74 words
The noise checking installation as defined in claim 5, further including a distance measuring value transmitter for measuring the axial displacement of said at least one shaft relative to its housing, a distance measuring device, said distance measuring value transmitter being operatively coupled via said distance measuring device and said amplifier means with said servo valve for correcting the actual position of said one shaft relative to a position prescribed by the control element.
Claim 8
Dependent Claim
100 words
The noise checking installation as defined in claim 1, wherein said mounting means for each of said gears comprises a housing, said hydrostatic bearings comprising two respective hydrostatic axial bearings for mounting each shaft carrying the associated gear so as to be axially displaceable in the associated housing, each axial bearing being equipped with a substantially ring-shaped piston possessing substantially ringshaped pressure oil pockets between the associated housing and the associated piston, and wherein the two respective pressure oil pockets associated with each of the shafts are coupled with a respective servo valve for the axial displacement of both shafts.
Claim 9
Dependent Claim
88 words
The noise checking installation as defined in claim 4, further including an electrical measurement value transmitter operatively connected with said diaphragm for converting oscillations of the diaphragm into electrical signals, means for recording the liquid sound converted into electrical signals as a function of the axial displacement of said at least one shaft carrying the gear, said recording means including a filter and a recorder, a differentiating mechanism for determining the minimum of said function, and a further mechanism for determining the null value of the differentiated function.
Claim 10
Dependent Claim
53 words
The noise testing installation as defined in claim 1, further including regulator means for maintaining constant the meshing frequency, said regulator means incorporating an inductive measurement value transmitter for measuring the rotational speed of an associated one of said shafts, and a regulator operatively connected with a motor for driving said lastmentioned shaft.
Claim 11
Dependent Claim
43 words
The noise checking installation as defined in claim 1, means for driving one of said shafts, the other of said shafts carrying the gear which is driven, a brake mounted at the shaft carrying the driven gear for generating a certain rotational moment.
Claim 12
Dependent Claim
32 words
The noise checking installation as defined in claim 2, wherein said hydrostatic bearings include hydrostatic axial bearings, means for operatively connecting the differential pressure transmitter to one of said hydrostatic axial bearings.
Claim 13
Dependent Claim
39 words
The noise checking installation as defined in claim 2, wherein said measuring means comprises a pressure transmitter operatively coupled with a pressure oil pocket of one of the hydrostatic bearings of said at least one shaft carrying the gear.
References Cited (Backward Citations)
US1981693A
Cited
US3127767A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-07-14 | 1979-01-13 | 1979-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-14 | 1983-01-13 | 1983-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-14 | 1987-01-13 | 1987-07-15 | $7700.00 | Window Closed / Lapsed |