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Abstract\u200b: Keywords: [\/et_pb_text][et_pb_button button_url=”https:\/\/revija-ventil.si\/wp-content\/uploads\/trajkovski_11-2024.pdf” url_new_window=”on” button_text=”Download PDF” admin_label=”Gumb Prenesi PDF” _builder_version=”4.27.0″ custom_button=”on” button_text_size=”15px” button_text_color=”#00868a” button_bg_color=”rgba(0,0,0,0)” button_border_color=”#00868a” button_icon=”||divi||400″ custom_margin=”||0px||false|false” custom_margin_tablet=”||20px||false|false” custom_margin_phone=”” custom_margin_last_edited=”on|desktop” custom_padding=”||||false|false” hover_enabled=”0″ locked=”off” global_colors_info=”{}” button_border_color__hover_enabled=”on|hover” button_border_color__hover=”#00868a” theme_builder_area=”post_content” sticky_enabled=”0″][\/et_pb_button][et_pb_post_nav in_same_term=”on” prev_text=”Older entries” next_text=”Newer entries” admin_label=”Navigacija po objavah” _builder_version=”4.3.3″ custom_margin=”||||false|false” custom_margin_phone=”||||false|false” custom_margin_last_edited=”off|desktop” custom_padding=”20px||||false|false” custom_padding_tablet=”0px||0px||false|false” custom_padding_phone=”0px||0px||false|false” custom_padding_last_edited=”on|tablet” title_text_color_last_edited=”off|desktop” global_module=”11763″ locked=”off” global_colors_info=”{}” title_text_color__hover_enabled=”on|desktop” title_text_color__hover=”#212b31″ theme_builder_area=”post_content”][\/et_pb_post_nav][\/et_pb_column][et_pb_column type=”1_4″ _builder_version=”4.16″ custom_padding=”|||” global_colors_info=”{}” custom_padding__hover=”|||” theme_builder_area=”post_content”][et_pb_sidebar orientation=”right” area=”et_pb_widget_area_4″ disabled_on=”on|on|off” _builder_version=”4.3.3″ global_module=”11764″ global_colors_info=”{}” theme_builder_area=”post_content”][\/et_pb_sidebar][\/et_pb_column][\/et_pb_row][\/et_pb_section]<\/p>\n","protected":false},"excerpt":{"rendered":" Engineering polymers have proven to have very promising tribological properties and successfully follow high-performance thermoplastics. In our research, we tested and analyzed polyoxymethylene (POM) for the very demanding operating conditions of hydraulic on\/off valves.<\/p>\n","protected":false},"author":5,"featured_media":15555,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"on","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"categories":[153,154],"tags":[],"class_list":["post-15582","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-exposed-articles","category-science-and-expert-articles"],"_links":{"self":[{"href":"https:\/\/revija-ventil.si\/en\/wp-json\/wp\/v2\/posts\/15582","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/revija-ventil.si\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/revija-ventil.si\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/revija-ventil.si\/en\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/revija-ventil.si\/en\/wp-json\/wp\/v2\/comments?post=15582"}],"version-history":[{"count":2,"href":"https:\/\/revija-ventil.si\/en\/wp-json\/wp\/v2\/posts\/15582\/revisions"}],"predecessor-version":[{"id":15584,"href":"https:\/\/revija-ventil.si\/en\/wp-json\/wp\/v2\/posts\/15582\/revisions\/15584"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/revija-ventil.si\/en\/wp-json\/wp\/v2\/media\/15555"}],"wp:attachment":[{"href":"https:\/\/revija-ventil.si\/en\/wp-json\/wp\/v2\/media?parent=15582"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/revija-ventil.si\/en\/wp-json\/wp\/v2\/categories?post=15582"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/revija-ventil.si\/en\/wp-json\/wp\/v2\/tags?post=15582"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
<\/strong>Engineering polymers have proven to have very promising tribological properties and successfully follow high-performance thermoplastics. In our research, we tested and analyzed polyoxymethylene (POM) for the very demanding operating conditions of hydraulic on\/off valves. We tested POM and POM reinforced with 30% carbon fiber (PO CF30) in standard ISO VG46 hydraulic oil, glycerol-water mixture and demineralized water at room and elevated temperatures.
The results showed a very low coefficient of friction (~ 0.027 – 0.033) and specific wear (~ 10-7 mm3\/Nm) in the mixture of glycerol and water, comparable to the values measured in standard hydraulic oil and lower than those measured in water (coefficient of friction ~ 0.14, specific wear ~ 10-6 mm3\/Nm), at room temperature. At elevated temperature, the coefficient of friction in hydraulic oil and glycerol-water mixture increased slightly, while in water decreased, measured values become comparable for all lubricants. The specific wear rate increased significantly in the hydraulic oil and glycerol-in-water mixture at elevated temperature and the values became comparable to the specific wear rates measured in water. Based on the results, both polyoxymethylene and glycerol-water mixture can be good and sustainable alternatives for standard hydraulic oil and steel tribological pairs, leading to excellent tribological properties with a significant reduction in component mass.<\/p>\n
<\/strong>polymer, polyoxymethylene, glycerol, water, hydraulic oil, friction, wear, hydraulics<\/p>\n