GB560955A - Improvements in the balancing of reciprocating engines - Google Patents
Improvements in the balancing of reciprocating enginesInfo
- Publication number
- GB560955A GB560955A GB1334342A GB1334342A GB560955A GB 560955 A GB560955 A GB 560955A GB 1334342 A GB1334342 A GB 1334342A GB 1334342 A GB1334342 A GB 1334342A GB 560955 A GB560955 A GB 560955A
- Authority
- GB
- United Kingdom
- Prior art keywords
- pistons
- weights
- pump
- crank
- weight
- 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
- 230000004048 modification Effects 0.000 abstract 2
- 238000012986 modification Methods 0.000 abstract 2
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 230000002000 scavenging effect Effects 0.000 abstract 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M1/00—Testing static or dynamic balance of machines or structures
- G01M1/12—Static balancing; Determining position of centre of gravity
- G01M1/122—Determining position of centre of gravity
Landscapes
- Engineering & Computer Science (AREA)
- Aviation & Aerospace Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
Abstract
560,955. Balancing reciprocating engines. DOXFORD & SONS, Ltd., W., and PURDIE, W. H. Sept. 22, 1942, No. 13343. [Class 7 (ii)] An oil engine of the vertical opposed-piston single crank-shaft type of the kind having a scavenge pump 20, Fig. 2, driven from the crank-shaft and situated in the middle of a row of cylinders, has the weights of all the lower (or upper) pistons modified, half being increased and half decreased, all by the same amount and the position of the scavenging crank 22 is arranged so that unbalanced primary forces for the complete engine remain at zero while the unbalanced secondary vertical forces are reduced to a small valve. In a four-cylinder engine, Fig. 2, each cylinder has two pistons coupled to a single crank-shaft 19 and the scavenge pump 20 is arranged between cylinders 2 and 3. The reciprocating weight of the pump is balanced by reducing the weight of lower pistons 26, 27 (cylinders 3 and 4) conveniently by fitting thinner piston skirts and increasing the weight of the other lower pistons 24, 25 by' the same amount by adding weights 28, 29. The phase of the pump crank relative to the cylinder cranks is shown in Fig. 3 and the added or subtracted weight is equal to #2 / 4 = 353, of the reciprocating weight of the scavenge piston assembly. In a modification, Figs. 4 and 5, the lower pistons are secured to cranks arranged at 60 degrees. The scavenge pump crank coincides with that of cylinder No. 5 and in order to balance the scavenge pump assembly when the pump has the same stroke as the lower pistons, the weights of the lower pistons in cylinders 1, 5 and 3 are reduced by a quarter of the reciprocating weight of the scavenge pump assembly 31 and the pistons of cylinders 2, 4, 6 have their weights increased by the same amount. If the pump has a different stroke from the lower pistons, the added and subtracted weights are modified aceordingly. In other examples, the modification of the weights may be applied to the upper set of pistons or to both sets of pistons.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1334342A GB560955A (en) | 1942-09-22 | 1942-09-22 | Improvements in the balancing of reciprocating engines |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1334342A GB560955A (en) | 1942-09-22 | 1942-09-22 | Improvements in the balancing of reciprocating engines |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB560955A true GB560955A (en) | 1944-04-28 |
Family
ID=10021226
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1334342A Expired GB560955A (en) | 1942-09-22 | 1942-09-22 | Improvements in the balancing of reciprocating engines |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB560955A (en) |
-
1942
- 1942-09-22 GB GB1334342A patent/GB560955A/en not_active Expired
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