{"id":55,"count":1,"description":"A \"Normally Open\" brake is a unit that is <strong>disengaged<\/strong> in its default, de-energized state. In this state, the shaft is free to rotate without any braking force being applied. To activate the brake and stop or hold the load, power must be supplied.    This is often referred to as a \"power-applied\" or \"energize-to-engage\" brake.    The principle of operation is the inverse of a spring-applied (fail-safe) brake:  <ul>   \t<li><strong>\u0627\u0644\u062d\u0627\u0644\u0629 \u0627\u0644\u0627\u0641\u062a\u0631\u0627\u0636\u064a\u0629 (\u0625\u064a\u0642\u0627\u0641 \u0627\u0644\u0637\u0627\u0642\u0629):<\/strong>\u00a0There is no force\u2014or only a very light release spring force\u2014acting on the friction disc. The brake is \"open,\" and the shaft is free.<\/li>   \t<li><strong>\u062d\u0627\u0644\u0629 \u0627\u0644\u0643\u0628\u062d (\u062a\u0634\u063a\u064a\u0644 \u0627\u0644\u0637\u0627\u0642\u0629):<\/strong>\u00a0\u064a\u062a\u0645 \u062a\u0637\u0628\u064a\u0642 \u0627\u0644\u0642\u0648\u0629 (\u0639\u0627\u062f\u0629 \u0636\u063a\u0637 \u0647\u064a\u062f\u0631\u0648\u0644\u064a\u0643\u064a\u060c \u0636\u063a\u0637 \u0647\u0648\u0627\u0626\u064a\u060c \u0623\u0648 \u062a\u064a\u0627\u0631 \u0643\u0647\u0631\u0628\u0627\u0626\u064a \u064a\u062e\u0644\u0642 \u0645\u062c\u0627\u0644\u064b\u0627 \u0645\u063a\u0646\u0627\u0637\u064a\u0633\u064a\u064b\u0627) \u0628\u0646\u0634\u0627\u0637 \u0644\u062a\u0648\u0644\u064a\u062f \u0642\u0648\u0629 \u062a\u062b\u0628\u064a\u062a \u0639\u0644\u0649 \u0642\u0631\u0635 \u0627\u0644\u0627\u062d\u062a\u0643\u0627\u0643\u060c \u0645\u0645\u0627 \u064a\u0641\u0639\u0651\u0644 \u0627\u0644\u0645\u0643\u0628\u062d \u0648\u064a\u062e\u0644\u0642 \u0639\u0632\u0645 \u0643\u0628\u062d.<\/li>  <\/ul>  <strong>Crucial Safety Implication:<\/strong> A \"Normally Open\" brake is <strong>\u0644\u064a\u0633 \u0622\u0645\u0646\u0627\u064b \u0628\u0634\u0643\u0644 \u0643\u0627\u0645\u0644<\/strong>. If there is a loss of control power or system pressure, the braking force is lost, and the brake will disengage.    <strong>Primary Applications:<\/strong> Because they are not fail-safe, \"Normally Open\" brakes are used for specific service or process control functions, not for critical safety holding:  <ul>   \t<li><strong>\u0627\u0644\u062a\u062d\u0643\u0645 \u0641\u064a \u0627\u0644\u0634\u062f:<\/strong>\u00a0In unwind stands for materials like paper, steel, or wire, a \"Normally Open\" pneumatic or electric brake can apply a continuous and precisely modulated amount of drag to maintain constant tension in the material as it is unspooled.<\/li>   \t<li><strong>\u0627\u0644\u0643\u0628\u062d \u0627\u0644\u062f\u064a\u0646\u0627\u0645\u064a\u0643\u064a \u0644\u0644\u062e\u062f\u0645\u0629:<\/strong>\u00a0\u064a\u062a\u0645 \u0627\u0633\u062a\u062e\u062f\u0627\u0645\u0647\u0627 \u0643\u0645\u0643\u0627\u0628\u062d \u062e\u062f\u0645\u0629 \u0631\u0626\u064a\u0633\u064a\u0629 \u0641\u064a \u0627\u0644\u062a\u0637\u0628\u064a\u0642\u0627\u062a \u0627\u0644\u062a\u064a \u064a\u062a\u0645 \u0641\u064a\u0647\u0627 \u062a\u0631\u0643\u064a\u0628 \u0645\u0643\u0627\u0628\u062d \u0637\u0627\u0631\u0626\u0629 \u0623\u0648 \u0648\u0642\u0648\u0641 \u0622\u0645\u0646\u0629 \u0645\u0646\u0641\u0635\u0644\u0629 \u0623\u064a\u0636\u064b\u0627. \u0639\u0644\u0649 \u0633\u0628\u064a\u0644 \u0627\u0644\u0645\u062b\u0627\u0644\u060c \u0645\u0643\u0627\u0628\u062d \u0627\u0644\u062e\u062f\u0645\u0629 \u0639\u0644\u0649 \u0645\u0631\u0643\u0628\u0629 \u0623\u0648 \u0639\u0631\u0628\u0629 \u0645\u062a\u062d\u0631\u0643\u0629.<\/li>   \t<li><strong>\u0645\u0642\u0627\u064a\u064a\u0633 \u0627\u0644\u0642\u0648\u0629:<\/strong>\u00a0\u064a\u0633\u062a\u062e\u062f\u0645 \u0644\u062a\u0637\u0628\u064a\u0642 \u062d\u0645\u0648\u0644\u0629 \u0645\u062a\u063a\u064a\u0631\u0629 \u0648\u0645\u062a\u062d\u0643\u0645 \u0641\u064a\u0647\u0627 \u0644\u0627\u062e\u062a\u0628\u0627\u0631 \u0623\u062f\u0627\u0621 \u0627\u0644\u0645\u062d\u0631\u0643\u0627\u062a \u0648\u0627\u0644\u0645\u062d\u0631\u0643\u0627\u062a.<\/li>  <\/ul>  In summary, \"Normally Open\" describes a brake that requires power to stop a load. Its function is primarily for controlled, in-process braking, and it is fundamentally unsuitable for applications where a load must be safely held in the event of a power failure.","link":"https:\/\/www.takebrakes.com\/ar\/tag\/normally-open\/","name":"\u0645\u0641\u062a\u0648\u062d \u0639\u0627\u062f\u0629\u064b","slug":"normally-open","taxonomy":"post_tag","meta":[],"_links":{"self":[{"href":"https:\/\/www.takebrakes.com\/ar\/wp-json\/wp\/v2\/tags\/55","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.takebrakes.com\/ar\/wp-json\/wp\/v2\/tags"}],"about":[{"href":"https:\/\/www.takebrakes.com\/ar\/wp-json\/wp\/v2\/taxonomies\/post_tag"}],"wp:post_type":[{"href":"https:\/\/www.takebrakes.com\/ar\/wp-json\/wp\/v2\/posts?tags=55"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}