GB775698A - Improvements in constant power speed-varying hydraulic apparatus - Google Patents
Improvements in constant power speed-varying hydraulic apparatusInfo
- Publication number
- GB775698A GB775698A GB33163/54A GB3316354A GB775698A GB 775698 A GB775698 A GB 775698A GB 33163/54 A GB33163/54 A GB 33163/54A GB 3316354 A GB3316354 A GB 3316354A GB 775698 A GB775698 A GB 775698A
- Authority
- GB
- United Kingdom
- Prior art keywords
- pressure
- pipes
- pump
- valve
- pipe
- 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.)
- Expired
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/38—Control of exclusively fluid gearing
- F16H61/40—Control of exclusively fluid gearing hydrostatic
- F16H61/4157—Control of braking, e.g. preventing pump over-speeding when motor acts as a pump
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/38—Control of exclusively fluid gearing
- F16H61/40—Control of exclusively fluid gearing hydrostatic
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Fluid Gearings (AREA)
Abstract
775,698. Controlling variable speed hydraulic transmissions. OFFICINE GALILEO SOC. PER AZIONI. Nov. 16, 1954 [Nov. 18, 1953], No. 33163/54. Class 69 (2). In hydraulic apparatus comprising a pump 1 and a motor 3 connected by pipes 4,5, liquid lost through leakage is replaced by a pump 6 driven by a motor 7. If the pressure in either of the pipes 4, 5 is less than the delivery pressure of the pump 6, liquid passes into the pipe having the lowest pressure via a pipe 9, one of two valves 10, 11, and pipes 12, 121 or 13, 13<SP>1</SP>. The pump 6 discharges its excess delivery through a valve to a feed tank. The tank is connected by a pipe 8 to the pump. The apparatus is prevented from operating if the supply of electricity fails or if the supply of additional fluid from the pump 6 fails, and is also protected from the effects of excess pressure in the pipes 4, 5. The pipes 12, 13 are connected together via pipes 15, 16 and by a differential pressure valve 14 having a spring 19 which balances the combined pressures in the pipes 15, 16 and normally keeps the valve closed. A rise in pressure in either of the pipes 15, 16 causes the valve to open against the spring pressure and the balance in pressure to be restored. The pressure in pipe 9 is connected via a pipe 21 to a spring-urged piston 24 in a cylinder 23 and, if this pressure falls, the piston 24 is moved by its spring and through a linkage 27, 28 moves a slide valve 29 and connects pipes 31 and 32 whereby the supply between the pump 1 and the motor 3 is short-circuited. A further linkage 34-38 applies a brake 40, 41 to a shaft 42 connected to the motor. Failure of the electricity supply causes a solenoid-operated valve 43 to open and the pressure in the pipe 21 to drop. The piston 24 is then moved by its spring and operates the slide valve 29 and the brake 40, 41. The valve 43 may be controlled by any suitable mechanical, hydrodynamic, or pneumatic device, or may be operated manually.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT775698X | 1953-11-18 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB775698A true GB775698A (en) | 1957-05-29 |
Family
ID=11316255
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB33163/54A Expired GB775698A (en) | 1953-11-18 | 1954-11-16 | Improvements in constant power speed-varying hydraulic apparatus |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB775698A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2446008A1 (en) * | 1973-09-26 | 1975-05-22 | Eaton Corp | HYDROSTATIC DRIVE SYSTEM |
| DE3623675A1 (en) * | 1986-07-12 | 1988-01-21 | Leopold Weinlich | TESTING DEVICE FOR TESTING ENGINES |
| CN111408484A (en) * | 2019-12-25 | 2020-07-14 | 西安水牧环境科技有限公司 | Horizontal spiral discharge centrifuge |
-
1954
- 1954-11-16 GB GB33163/54A patent/GB775698A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2446008A1 (en) * | 1973-09-26 | 1975-05-22 | Eaton Corp | HYDROSTATIC DRIVE SYSTEM |
| DE3623675A1 (en) * | 1986-07-12 | 1988-01-21 | Leopold Weinlich | TESTING DEVICE FOR TESTING ENGINES |
| CN111408484A (en) * | 2019-12-25 | 2020-07-14 | 西安水牧环境科技有限公司 | Horizontal spiral discharge centrifuge |
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