GB2147951A - Hydrostatic machine (pump or motor) - Google Patents
Hydrostatic machine (pump or motor) Download PDFInfo
- Publication number
- GB2147951A GB2147951A GB08424941A GB8424941A GB2147951A GB 2147951 A GB2147951 A GB 2147951A GB 08424941 A GB08424941 A GB 08424941A GB 8424941 A GB8424941 A GB 8424941A GB 2147951 A GB2147951 A GB 2147951A
- Authority
- GB
- United Kingdom
- Prior art keywords
- machine
- pump
- temperature
- casing
- temperature difference
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B51/00—Testing machines, pumps, or pumping installations
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B2205/00—Fluid parameters
- F04B2205/10—Inlet temperature
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B2205/00—Fluid parameters
- F04B2205/11—Outlet temperature
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Rotary Pumps (AREA)
- Details And Applications Of Rotary Liquid Pumps (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Hydraulic Motors (AREA)
Abstract
Temperature measurement devices e.g. thermocouples (A, B) or (A', B') are located at the inlet and outlet sides of the machine. The wear condition and efficiency can be determined from the temperature difference. The machine may be a conventional gear pump or motor (as shown). <IMAGE>
Description
SPECIFICATiON
Hydrostatic machine (pump or motor)
The wear condition of a hydrostatic machine can be recognised from its efficiency. This can in turn be determined from the temperature difference between the inlet and the outlet.
This is a very simple and cheap method of recognising and determining the wear condition and efficiency of a hydrostatic machine.
Thermocouples are particularly suitable as the temperature measuring device. It is desirable that the temperature difference should be indicated on an LCD indicator on the pump casing.
One embodiment example of the invention is shown in the drawing and is explained in more detail in the following description.
Figure 1 shows a gear pump in crosssection and
Figure 2 shows an end view of a gear pump.
In Fig. 1, 10 shows the casing of a gear pump in which is located a casing recess 11 formed by two intersecting holes 1 2 and 1 3.
Two gear wheels 14 and 1 5 are in external engagement in the casing recess 11. They induce a pressure medium via an inlet hole 1 6 and displace this into an outlet hole 1 7. A thermocouple A or A' is located in the inlet hole 1 6 either at the end of the induction pipe or directly before the tooth engagement; a second thermocouple B or B' is located in the outlet hole either at the casing outlet or directly after the tooth engagement.
The wear condition of the machine can be recognised from its efficiency. This can in turn be calculated from the temperature difference between the inlet hole 1 6 and the outlet hole 1 7. With an increase of wear, an increasing proportion of the power supplied to the machine is converted into heat. The temperature is measured by means of the thermocouples mentioned. The wear can then be determined empirically, for example by means of comparative curves or even by calculation.
The measurement device preferably consists of an LCD indicator element 1 9 bonded to the casing or a coloured strip which changes with the temperature difference. Integrating the elements for the thermal efficiency measurement in the pump makes additional components unnecessary. Fundamentally, this method can be used on any hydrostatic machine.
1. Hydrostatic machine (pump or motor), characterised in that a temperature measurement device (A, A'; B, B') is located on both the inlet and outlet sides (16, 17) for the purpose of determining the temperature difference.
2. Machine in accordance with Claim 1, characterised in that a temperature indication device (1 9) which indicates the temperature difference is located on the machine.
3. Machine in accordance with Claim 1 and/or 2, characterised in that the temperature measuring devices are thermocouples.
4. Machine in accordance with Claim 2, characterised in that the temperature indication device is an LCD indicator element (19).
5. A hydrostatic machine substantially as herein described with reference to the accompanying drawing.
**WARNING** end of DESC field may overlap start of CLMS **.
Claims (5)
1. Hydrostatic machine (pump or motor), characterised in that a temperature measurement device (A, A'; B, B') is located on both the inlet and outlet sides (16, 17) for the purpose of determining the temperature difference.
2. Machine in accordance with Claim 1, characterised in that a temperature indication device (1 9) which indicates the temperature difference is located on the machine.
3. Machine in accordance with Claim 1 and/or 2, characterised in that the temperature measuring devices are thermocouples.
4. Machine in accordance with Claim 2, characterised in that the temperature indication device is an LCD indicator element (19).
5. A hydrostatic machine substantially as herein described with reference to the accompanying drawing.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19833335862 DE3335862A1 (en) | 1983-10-03 | 1983-10-03 | HYDROSTATIC MACHINE (PUMP OR MOTOR) |
Publications (3)
Publication Number | Publication Date |
---|---|
GB8424941D0 GB8424941D0 (en) | 1984-11-07 |
GB2147951A true GB2147951A (en) | 1985-05-22 |
GB2147951B GB2147951B (en) | 1987-07-22 |
Family
ID=6210807
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB08424941A Expired GB2147951B (en) | 1983-10-03 | 1984-10-03 | Hydrostatic machine (pump or motor) |
Country Status (5)
Country | Link |
---|---|
JP (1) | JPS6061487U (en) |
DE (1) | DE3335862A1 (en) |
FR (1) | FR2552827A1 (en) |
GB (1) | GB2147951B (en) |
IT (1) | IT8423328V0 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4633976A (en) * | 1983-08-12 | 1987-01-06 | The Yokohama Rubber Co., Ltd. | Method of controlling lubricating-oil quantity for internal mixer |
GB2259333A (en) * | 1991-09-07 | 1993-03-10 | Teves Gmbh Alfred | Gear pump with a delivery rate depending non-linearly on pump speed |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1065218A (en) * | 1965-09-04 | 1967-04-12 | Vilter Manufacturing Corp | Compressor protection system |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH601782A5 (en) * | 1976-11-30 | 1978-07-14 | Hoefflinger Werner | |
DE3025767A1 (en) * | 1980-07-08 | 1982-02-04 | Robert Bosch Gmbh, 7000 Stuttgart | Opto-electronic display incorporating touch control switch - has spaced transparent electrodes applied to finger depression in front surface of display |
JPS5783687A (en) * | 1980-11-13 | 1982-05-25 | Nachi Fujikoshi Corp | Efficiency measurement unit for hydraulic pump or motor |
US4406550A (en) * | 1981-01-26 | 1983-09-27 | Lane S. Garrett | Temperature monitoring and utilization system |
US4510576A (en) * | 1982-07-26 | 1985-04-09 | Honeywell Inc. | Specific coefficient of performance measuring device |
-
1983
- 1983-10-03 DE DE19833335862 patent/DE3335862A1/en not_active Withdrawn
-
1984
- 1984-09-26 IT IT2332884U patent/IT8423328V0/en unknown
- 1984-09-26 JP JP14437184U patent/JPS6061487U/en active Pending
- 1984-10-03 FR FR8415194A patent/FR2552827A1/en active Pending
- 1984-10-03 GB GB08424941A patent/GB2147951B/en not_active Expired
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1065218A (en) * | 1965-09-04 | 1967-04-12 | Vilter Manufacturing Corp | Compressor protection system |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4633976A (en) * | 1983-08-12 | 1987-01-06 | The Yokohama Rubber Co., Ltd. | Method of controlling lubricating-oil quantity for internal mixer |
GB2259333A (en) * | 1991-09-07 | 1993-03-10 | Teves Gmbh Alfred | Gear pump with a delivery rate depending non-linearly on pump speed |
Also Published As
Publication number | Publication date |
---|---|
IT8423328V0 (en) | 1984-09-26 |
JPS6061487U (en) | 1985-04-30 |
GB2147951B (en) | 1987-07-22 |
DE3335862A1 (en) | 1985-04-18 |
FR2552827A1 (en) | 1985-04-05 |
GB8424941D0 (en) | 1984-11-07 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US3651695A (en) | Colorimetric temperature sensor | |
KR860006862A (en) | Generator's temperature monitor device | |
FR2436074A1 (en) | DEVICE FOR CONTROLLING GOVERNES OF AN AIRCRAFT AND METHOD FOR DETECTING FAULTS IN THE MAIN LOAD CIRCUIT OF THIS DEVICE | |
EP0100210A3 (en) | Coefficient of performance measuring device | |
US2586060A (en) | Arrangement for measuring or indicating the flow of fluids | |
GB1367835A (en) | Determining a parameter of a flow of electrically-conductive fluid | |
GB2147951A (en) | Hydrostatic machine (pump or motor) | |
US4501504A (en) | Non-contacting measurement of surface temperature | |
WO2004011886A3 (en) | A method and apparatus for determining flow rate of a fluid | |
ATE71449T1 (en) | METHOD OF MONITORING AN OIL LUBRICATED VACUUM PUMP. | |
JPS62142932A (en) | Heating apparatus | |
MD1014G2 (en) | Process for measuring the fluid medium velocity and device therefor | |
JPH0712155A (en) | Wet type friction gearing damage preventing method and device therefor | |
DE2910582A1 (en) | Overpressure fluid engine cooling system monitor - compares temp. and pressure sensor signals and warns of threshold difference | |
JPS5471679A (en) | Thermal resistance measuring device | |
US20230184593A1 (en) | Fluid conduit with embedded sensors | |
EP0325024A2 (en) | Monitoring the efficiency of liquid pumps | |
SU1386435A1 (en) | Device for testing process properties of cutting fluid | |
JP2003337076A5 (en) | ||
KR0158131B1 (en) | Oil pressure and temperature measuring device for power steering system | |
RU2111434C1 (en) | Method for check of choking of heat exchanger in instrument cabinet | |
SU810214A1 (en) | Sensor for measuring blood circulation rate | |
SU1654681A1 (en) | Device for measuring the amount of heat consumed by heat- exchange apparatus | |
SU649090A1 (en) | Method of indication of induction electric apparatus temperature | |
SU1682798A1 (en) | Thermal consumption measuring unit |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PCNP | Patent ceased through non-payment of renewal fee |