{"id":3034,"date":"2023-11-19T13:03:36","date_gmt":"2023-11-19T12:03:36","guid":{"rendered":"https:\/\/mbci.mackuz.ovh\/?p=3034"},"modified":"2023-11-19T13:03:36","modified_gmt":"2023-11-19T12:03:36","slug":"viscofan-coupling-temperature-controlled","status":"publish","type":"post","link":"https:\/\/mbci.mackuz.ovh\/index.php\/2023\/11\/19\/viscofan-coupling-temperature-controlled\/","title":{"rendered":"Viscofan coupling, temperature-controlled"},"content":{"rendered":"

 <\/p>\n\n\n\n\n\n\n\n\n\n\n\n
<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/tr>\n
<\/td>\n\n
\n
<\/div>\n<\/div>\n

 <\/td>\n

<\/td>\n<\/tr>\n
<\/td>\n\n
\n
20\u2014310 Viscofan coupling, temperature-controlled<\/strong><\/div>\n<\/div>\n<\/td>\n
<\/td>\n<\/tr>\n
<\/td>\n\n
\n
<\/div>\n<\/div>\n

 <\/td>\n

<\/td>\n<\/tr>\n
<\/td>\n\n
\n
Operation<\/div>\n<\/div>\n<\/td>\n
<\/td>\n<\/tr>\n
<\/td>\n\n
\n
<\/div>\n<\/div>\n

 <\/td>\n

<\/td>\n<\/tr>\n
<\/td>\n\n
\n
The viscofan coupling is a service-free, hydraulic coupling which operates in dependence of tempera\u00adture as well as infinitely variable.<\/div>\n
When the engine is started (cold start) the fan will initially run at higher speed until the oil has flown back from the working chamber (75) to the reservoir (74) (approx. 1\u20143 minutes). The fan coupling will then switch off. The fan speed in disconnected con\u00addition depends on engine speed, but a fan speed of approx. 2100\/min should not be exceeded.<\/div>\n
This condition remains in force as long as the engine maintains its normal operating temperature.<\/div>\n
If the coolant temperature increases as the result of the higher load or higher outside temperatures, the air which flows through the radiator and actuates the bimetallic strip will become warmer. The bimetallic strip (69) changes its shape under the increasing heat and opens at approx. 73 \u00b0C a valve by means of a control pin (68) and thereby the path of the oil from reservoir (74) into working chamber (75), so that the fan will be additionally engaged.<\/div>\n
During this control operation, the coolant tempera\u00adture is between 90 and 95 \u00b0C.<\/div>\n
With the clutch engaged, the fan speed in lower speed range will increase approximately proportional with increasing engine speed, but will not exceed 3500\/min in upper speed range.<\/div>\n<\/div>\n<\/td>\n
\n
\"om617<\/div>\n<\/td>\n
<\/td>\n<\/tr>\n
<\/td>\n\n
\n
<\/div>\n<\/div>\n

 <\/td>\n

<\/td>\n<\/tr>\n
<\/td>\n\n
\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/tr>\n
<\/td>\n\n
<\/div>\n

 <\/td>\n

\n
\n
60<\/div>\n<\/div>\n<\/td>\n
\n
\n
Coupling body (secondary member)<\/div>\n<\/div>\n<\/td>\n
<\/td>\n<\/tr>\n
<\/td>\n\n
<\/div>\n

 <\/td>\n

\n
\n
61<\/div>\n<\/div>\n<\/td>\n
\n
\n
Pulley (primary member)<\/div>\n<\/div>\n<\/td>\n
<\/td>\n<\/tr>\n
<\/td>\n\n
<\/div>\n

 <\/td>\n

\n
\n
62<\/div>\n<\/div>\n<\/td>\n
\n
\n
Flange shaft<\/div>\n<\/div>\n<\/td>\n
<\/td>\n<\/tr>\n
<\/td>\n\n
<\/div>\n

 <\/td>\n

\n
\n
63<\/div>\n<\/div>\n<\/td>\n
\n
\n
Sealing ring<\/div>\n<\/div>\n<\/td>\n
<\/td>\n<\/tr>\n
<\/td>\n\n
<\/div>\n

 <\/td>\n

\n
\n
64<\/div>\n<\/div>\n<\/td>\n
\n
\n
Needle bearing<\/div>\n<\/div>\n<\/td>\n
<\/td>\n<\/tr>\n
<\/td>\n\n
<\/div>\n

 <\/td>\n

\n
\n
65<\/div>\n<\/div>\n<\/td>\n
\n
\n
Cooling fins<\/div>\n<\/div>\n<\/td>\n
<\/td>\n<\/tr>\n
<\/td>\n\n
<\/div>\n

 <\/td>\n

\n
\n
66<\/div>\n<\/div>\n<\/td>\n
\n
\n
Oil scraper<\/div>\n<\/div>\n<\/td>\n
<\/td>\n<\/tr>\n
<\/td>\n\n
<\/div>\n

 <\/td>\n

\n
\n
67<\/div>\n<\/div>\n<\/td>\n
\n
\n
Compression spring<\/div>\n<\/div>\n<\/td>\n
<\/td>\n<\/tr>\n
<\/td>\n\n
<\/div>\n

 <\/td>\n

\n
\n
68<\/div>\n<\/div>\n<\/td>\n
\n
\n
Control pin<\/div>\n<\/div>\n<\/td>\n
<\/td>\n<\/tr>\n
<\/td>\n\n
<\/div>\n

 <\/td>\n

\n
\n
69<\/div>\n<\/div>\n<\/td>\n
\n
\n
Bimetallic strip<\/div>\n<\/div>\n<\/td>\n
<\/td>\n<\/tr>\n
<\/td>\n\n
<\/div>\n

 <\/td>\n

\n
\n
70<\/div>\n<\/div>\n<\/td>\n
\n
\n
Cover with holding clip<\/div>\n<\/div>\n<\/td>\n
<\/td>\n<\/tr>\n
<\/td>\n\n
<\/div>\n

 <\/td>\n

\n
\n
71<\/div>\n<\/div>\n<\/td>\n
\n
\n
Intermediate washer<\/div>\n<\/div>\n<\/td>\n
<\/td>\n<\/tr>\n
<\/td>\n\n
<\/div>\n

 <\/td>\n

\n
\n
72<\/div>\n<\/div>\n<\/td>\n
\n
\n
Feed hole<\/div>\n<\/div>\n<\/td>\n
<\/td>\n<\/tr>\n
<\/td>\n\n
<\/div>\n

 <\/td>\n

\n
\n
73<\/div>\n<\/div>\n<\/td>\n
\n
\n
Valve lever<\/div>\n<\/div>\n<\/td>\n
<\/td>\n<\/tr>\n
<\/td>\n\n
<\/div>\n

 <\/td>\n

\n
\n
74<\/div>\n<\/div>\n<\/td>\n
\n
\n
Reservoir<\/div>\n<\/div>\n<\/td>\n
<\/td>\n<\/tr>\n
<\/td>\n\n
<\/div>\n

 <\/td>\n

\n
\n
75<\/div>\n<\/div>\n<\/td>\n
\n
\n
Working chamber<\/div>\n<\/div>\n<\/td>\n
<\/td>\n<\/tr>\n
<\/td>\n\n
\n
20.8-310\/1<\/div>\n<\/div>\n<\/td>\n
\n
\n
F2<\/div>\n<\/div>\n<\/td>\n
\n
<\/div>\n

 <\/td>\n

<\/td>\n<\/tr>\n
<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/td>\n\n
\"om617<\/div>\n<\/td>\n
<\/td>\n<\/tr>\n
<\/td>\n\n
\n
67 66<\/div>\n<\/div>\n<\/td>\n
<\/td>\n<\/tr>\n
<\/td>\n\n
\n
<\/div>\n<\/div>\n

 <\/td>\n

<\/td>\n<\/tr>\n
<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

 <\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
<\/td>\n<\/td>\n<\/td>\n<\/tr>\n
<\/td>\n\n
\n
<\/div>\n<\/div>\n

 <\/td>\n

<\/td>\n<\/tr>\n
<\/td>\n\n
\n
Checking connecting temperature<\/strong><\/div>\n<\/div>\n<\/td>\n
<\/td>\n<\/tr>\n
<\/td>\n\n
\n
<\/div>\n<\/div>\n

 <\/td>\n

<\/td>\n<\/tr>\n
<\/td>\n\n
\n
Run engine at 4000\u20144500\/min. As soon as a coolant temperature of 90 to 95 \u00b0C is attained, the fan speed should increase by approx. 1000\/min, which can be clearly noticed acoustically.<\/div>\n<\/div>\n<\/td>\n
<\/td>\n<\/tr>\n
<\/td>\n\n
\n
<\/div>\n<\/div>\n

 <\/td>\n

<\/td>\n<\/tr>\n
<\/td>\n\n
\n
Reconditioning<\/strong><\/div>\n<\/div>\n<\/td>\n
<\/td>\n<\/tr>\n
<\/td>\n\n
\n
<\/div>\n<\/div>\n

 <\/td>\n

<\/td>\n<\/tr>\n
<\/td>\n\n
\n
A defective coupling cannot be repaired with work\u00adshop equipment and a new coupling should therefore be installed.<\/div>\n<\/div>\n<\/td>\n
<\/td>\n<\/tr>\n
<\/td>\n\n
\n
<\/div>\n<\/div>\n

 <\/td>\n

<\/td>\n<\/tr>\n
<\/td>\n\n
\n
Transportation and storage<\/strong><\/div>\n<\/div>\n<\/td>\n
<\/td>\n<\/tr>\n
<\/td>\n\n
\n
<\/div>\n<\/div>\n

 <\/td>\n

<\/td>\n<\/tr>\n
<\/td>\n\n
\n
Temperature-controlled viscofan couplings should be transported and stored vertically. For short periods \u2014 e.g. during assembly \u2014 the coupling may rest on its flange, but never on front end.<\/div>\n<\/div>\n<\/td>\n
<\/td>\n<\/tr>\n
<\/td>\n\n
\n
<\/div>\n<\/div>\n

 <\/td>\n

<\/td>\n<\/tr>\n
<\/td>\n\n
\n
20.8-310\/2 F2<\/div>\n<\/div>\n<\/td>\n
<\/td>\n<\/tr>\n
<\/td>\n\n
\n
<\/div>\n<\/div>\n

 <\/td>\n

<\/td>\n<\/tr>\n
<\/td>\n<\/td>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

 <\/p>\n

 <\/p>\n

 <\/p>\n","protected":false},"excerpt":{"rendered":"

    20\u2014310 Viscofan coupling, temperature-controlled   Operation   The viscofan coupling is a service-free, hydraulic coupling which operates in dependence of tempera\u00adture as well as infinitely variable. When the engine is started (cold start) the fan will initially run at higher speed until the oil has flown back from the working chamber (75) to the reservoir (74) (approx. 1\u20143 minutes). The fan coupling will then switch off. The fan speed in disconnected con\u00addition depends on engine speed, but a fan speed of approx. 2100\/min should not be exceeded. This condition remains in force as long as the engine maintains its normal operating temperature. If the coolant temperature increases as the result of the higher load or higher outside temperatures, the air which flows through the radiator and actuates the bimetallic strip will become warmer. The bimetallic strip (69) changes its shape under the increasing heat and opens at approx. 73 \u00b0C a valve by means of a control pin (68) and thereby the path of the oil from reservoir (74) into working chamber (75), so that the fan will be additionally engaged. During this control operation, the coolant tempera\u00adture is between 90 and 95 \u00b0C. With the clutch engaged, the fan speed in lower speed range will increase approximately proportional with increasing engine speed, but will not exceed 3500\/min in upper speed range.     60 Coupling body (secondary member)   61 Pulley (primary member)   62 Flange shaft   63 Sealing ring   64 Needle bearing   65 Cooling fins   66 Oil scraper   67 Compression spring   68 Control pin   69 Bimetallic strip   70 Cover with holding clip   71 Intermediate washer   72 Feed hole   73 Valve lever   74 Reservoir   75 Working chamber 20.8-310\/1 F2   67 66       Checking connecting temperature   Run engine at 4000\u20144500\/min. As soon as a coolant temperature of 90 to 95 \u00b0C is attained, the fan speed should increase by approx. 1000\/min, which can be clearly noticed acoustically.   Reconditioning   A defective coupling cannot be repaired with work\u00adshop equipment and a new coupling should therefore be installed.   Transportation and storage   Temperature-controlled viscofan couplings should be transported and stored vertically. For short periods \u2014 e.g. during assembly \u2014 the coupling may rest on its flange, but never on front end.   20.8-310\/2 F2        <\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_crdt_document":"","footnotes":""},"categories":[55,44],"tags":[],"class_list":["post-3034","post","type-post","status-publish","format-standard","hentry","category-engine-cooling-om617","category-om617"],"aioseo_notices":[],"featured_image_src":null,"author_info":{"display_name":"mackuz","author_link":"https:\/\/mbci.mackuz.ovh\/index.php\/author\/mackuz\/"},"_links":{"self":[{"href":"https:\/\/mbci.mackuz.ovh\/index.php\/wp-json\/wp\/v2\/posts\/3034","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/mbci.mackuz.ovh\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/mbci.mackuz.ovh\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/mbci.mackuz.ovh\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/mbci.mackuz.ovh\/index.php\/wp-json\/wp\/v2\/comments?post=3034"}],"version-history":[{"count":1,"href":"https:\/\/mbci.mackuz.ovh\/index.php\/wp-json\/wp\/v2\/posts\/3034\/revisions"}],"predecessor-version":[{"id":3035,"href":"https:\/\/mbci.mackuz.ovh\/index.php\/wp-json\/wp\/v2\/posts\/3034\/revisions\/3035"}],"wp:attachment":[{"href":"https:\/\/mbci.mackuz.ovh\/index.php\/wp-json\/wp\/v2\/media?parent=3034"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mbci.mackuz.ovh\/index.php\/wp-json\/wp\/v2\/categories?post=3034"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mbci.mackuz.ovh\/index.php\/wp-json\/wp\/v2\/tags?post=3034"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}