{"id":611,"date":"2019-11-19T10:10:26","date_gmt":"2019-11-19T10:10:26","guid":{"rendered":"http:\/\/www.fineflowtech.com\/?p=611"},"modified":"2024-07-08T08:07:34","modified_gmt":"2024-07-08T02:37:34","slug":"determining-hydraulic-cylinder-efficiency","status":"publish","type":"post","link":"https:\/\/www.fineflowtech.com\/?p=611","title":{"rendered":"Hydraulic Cylinder Efficiency"},"content":{"rendered":"

Determining Hydraulic Cylinder Efficiency:<\/strong><\/span><\/h3>\n

With modern sealing technology, the volumetric efficiency (leakage losses) of a hydraulic cylinder in good condition approaches 100%. But the mechanical-hydraulic efficiency of a cylinder varies with seal type and the tolerances between the piston-rod and its wear bands.<\/p>\n

\"Typical
Typical Hydraulic Cylinder<\/em><\/figcaption><\/figure>\n

Recall that mechanical-hydraulic efficiency refers to the amount of force lost due to mechanical and fluid friction. In a cylinder, these losses are due to friction between the piston-rod and its wear bands and seals<\/em><\/strong>, and the friction<\/strong> of the fluid<\/em><\/strong> as it\u2019s ejected from the return side of the cylinder at the required velocity. In practice, fluid friction is not significant, provided the cylinder\u2019s ports and its connections are adequately sized.<\/p>\n

 <\/p>\n

 <\/p>\n

For a Single-Rod Cylinder<\/strong> when extending, mechanical-hydraulic efficiency is typically 95%, and 85 to 90%<\/strong> when retracting. The difference between extension and retraction reflects the fact that mechanical\/hydraulic friction is nearly constant, and it therefore represents a greater percentage of available force when the cylinder is retracting\u2013due to the smaller effective area of the rod-end annulus.<\/p>\n

 <\/p>\n

For example, consider a single-rod cylinder with an area ratio (piston to annulus) of 2:1. If piston force (during extension) is 10,000 lbf (44 kN) and annulus force (during retraction) is 5,000 lbf (22 kN), and losses due to mechanical and fluid friction are 500 lbf (2.2 kN) constant.<\/p>\n

 <\/p>\n

Then:<\/p>\n

Mechanical-hydraulic efficiency during extension<\/strong><\/em> is:
\n1 \u2013 (500\/10000) = 1 \u2013 0.05 = 0.95 = 95%<\/p>\n

And mechanical-hydraulic efficiency during retraction<\/strong><\/em> is:
\n1 \u2013 (500\/5000) = 1 \u2013 0.1 = 0.90 = 90%<\/p>\n

 <\/p>\n

Overall efficiency<\/strong> is simply the product of volumetric and mechanical\/hydraulic efficiency<\/strong><\/em>. In a hydraulic cylinder, where volumetric efficiency approaches 100%, overall efficiency equals mechanical\/hydraulic efficiency: 0.95 x 1 = 0.95 = 95%<\/strong><\/em><\/p>\n

Download DICSA Hydraulic Cylinders Catalog<\/strong> here:<\/h4>\n

[email-download-link namefield=”YES” group=”Industrial”]<\/p>\n

 <\/p>\n

 <\/p>\n

For more such articles sign up for our newsletter or register to join our mailing list below:<\/strong><\/h5>\n

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________________________________________________________________________________<\/p>\n

Article referenced on industrial technical snippets from various sources.<\/em><\/h6>\n

Fine Flow Technologies LLP are authorized and exclusive distributors of DICSA Spain<\/strong> for all products, solutions and services.<\/p>\n","protected":false},"excerpt":{"rendered":"

Determining Hydraulic Cylinder Efficiency: With modern sealing technology, the volumetric efficiency (leakage losses) of a hydraulic cylinder in good condition approaches 100%. But the mechanical-hydraulic efficiency of a cylinder varies […]<\/p>\n","protected":false},"author":1,"featured_media":613,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_exactmetrics_skip_tracking":false,"_exactmetrics_sitenote_active":false,"_exactmetrics_sitenote_note":"","_exactmetrics_sitenote_category":0,"footnotes":""},"categories":[21,4,11,6,12,1],"tags":[43,44,7,42,41],"class_list":["post-611","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-chemicals","category-hyd","category-industrial","category-pharma","category-pumps","category-uncategorized","tag-cylinders","tag-dicsa","tag-hydraulics","tag-manufacturing","tag-mechanical"],"yoast_head":"\nFine Flow Technologies LLP<\/title>\n<meta name=\"description\" content=\"Serving Critical Flow Needs\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link 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