Series 111 Accumulator Product Information Model 111.11 Model 111.12 011-553-304 D be certain.
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Contents 1.0 Technical Support 5 1.1.0 How to Get Technical Support........................................................................................................5 1.2.0 Before You Contact MTS................................................................................................................5 1.3.0 If You Contact MTS by Phone........................................................................................................7 1.4.0 Problem Submittal Form in MTS Manuals.............
1.0 Technical Support 1.1.0 How to Get Technical Support Start with your manuals The manuals supplied by MTS provide most of the information you need to use and maintain your equipment. If your equipment includes software, look for online help and README files that contain additional product information. Technical support methods MTS provides a full range of support services after your system is installed.
Know your site number and system number The site number contains your company number and identifies your equipment type (such as material testing or simulation). The number is typically written on a label on your equipment before the system leaves MTS. If you do not know your MTS site number, contact your sales engineer. Example site number: 571167 When you have more than one MTS system, the system job number identifies your system. You can find your job number in your order paperwork.
• Keyboard enhancers • Print spoolers • Messaging applications 1.3.0 If You Contact MTS by Phone A Call Center agent registers your call before connecting you with a technical support specialist. The agent asks you for your: • Site number • Name • Company name • Company address • Phone number where you can be reached If your issue has a notification number, please provide that number. A new issue will be assigned a unique notification number.
• Write down any specific instructions. After you call MTS logs and tracks all calls to ensure that you receive assistance for your problem or request. If you have questions about the status of your problem or have additional information to report, please contact Technical Support again and provide your original notification number. 1.4.
2.0 Preface 2.1.0 Before You Begin Safety first! Before you use your MTS product or system, read and understand the safety information provided with your system. Improper installation, operation, or maintenance can result in hazardous conditions that can cause severe personal injury or death, or damage to your equipment and specimen. Again, read and understand the safety information provided with your system before you continue.
CAUTION: Caution notices indicate the presence of a hazard with a low level of risk which, if ignored, could cause moderate or minor personal injury or equipment damage, or could endanger test integrity. Other special text conventions Important: Important notices provide information about your system that is essential to its proper function. While not safety-related, if the important information is ignored, test results may not be reliable, or your system may not operate properly.
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3.0 Introduction Topics: • • • • Introduction............................................................................................................................................14 What you need to know.........................................................................................................................14 Functional Description...........................................................................................................................
3.0 Introduction 3.1.0 Introduction The MTS Series 111 Accumulators stabilize the hydraulic lines in your system. There are two models available: • The Model 111.11B Accumulator is a boss port-mounted accumulator that requires a boss adapter fitting for mounting. • The Model 111.12C Accumulator is bolt-mounted to a flange and typically has a larger nitrogen gas capacity than the Model 111.11B. 3.2.0 What you need to know MTS Systems Corporation assumes that you know how to use your controller.
3.0 Introduction 3.3.0 Functional Description Series 111 Accumulators can reduce fluctuations in hydraulic lines due to sudden changes in hydraulic flow rate. They also act as a short-term energy source for high-rate tests by providing additional hydraulic flow for short periods to meet irregular peak demands. Like a capacitor, accumulators filter out pulses in the hydraulic fluid to provide steady hydraulic pressure. Accumulators are like a hydraulic version of a capacitor.
3.0 Introduction At some frequencies, fluid flow in the lines may stop completely, and overcoming the fluid inertia may become a more significant operational factor. An accumulator in the return line damps the pulsing effect caused by “slugs” of fluid being injected into the line as the actuator moves. Movement of hoses or hammering of hard lines is also reduced. 3.4.0 Series 111 Accumulator Specifications The following tables list the specifications for the Series 111 Accumulators.
3.0 Introduction * Model 111.11B-02 Nitrogen Gas Capacity Hydraulic Fluid Port Connection Maxp 6.35 (2.5) 12 SAE (1-1/16-12 UNF-2B) 4.63 (10.2) 7.87 (3.1) 6.35 (2.5) 16 SAE (1-5/16-12 UNF-2B) 5.94 (13.1) 42.88 (16.9) 7.87 (3.1) 6.35 (2.5) 20 SAE (1-5/8-12 UNF-2B) 7.98 (17.6) 29.51 (11.6) 12.7 (5.0) 10.16 (4.0) 1-1/2 SAE † † † Length A B cm (in.) cm (in.) cm (in.) 18.08 (7.12) 7.87 (3.1) 3 27.94 (11.0) 3 3 3 164 cm (10 3 in. ) 111.11B-03 475 cm (1 pt) 111.
3.0 Introduction Item Description 1 1.563 in. (39.7 mm) 2 Length 3 Typical Boss Adapter Fitting 4 Locking Pin 5 Hydraulic Fluid Port 6 Relief Vent 7 Accumulator Valve Assembly 8 Protective Cover Model 111.12C Accumulator Cross-Section Item Description 1 1.563 in. (39.7 mm) 2 Length 3 1.406 in. (35.7 mm) 4 0.703 in. (17.8 mm) 5 2.750 in. (69.9 mm) 6 1.375 in. (34.
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4.0 Safety Topics: • Hazard Placard Placement....................................................................................................................
4.0 Safety 4.1.0 Hazard Placard Placement Hazard placards contain specific safety information and are affixed directly to the system so they are plainly visible. Each placard describes a system-related hazard. When possible, international symbols (icons) are used to graphically indicate the type of hazard and the placard label indicates its severity.
4.0 Safety Label Description Skin injection hazard; release of fluid pressure. High pressure fluid and penetrate skin. Do not tamper with fittings or hoses. Wear appropriate protection such as safety goggles and gloves. Maintain safe pressure levels.
5.0 Installation Topics: • About the Series 111 Accumulator Installation Procedure.....................................................................
5.0 Installation 5.1.0 About the Series 111 Accumulator Installation Procedure There are two models of the Series 111 Accumulator. The following figure shows the typical mounting configuration for the Models 111.11B and 111.12C Accumulators. • The Model 111.11B Accumulator is mounted with a boss adapter fitting and O-ring seals. When the accumulator is ordered as a component, the boss adapter and O-ring seals are not included with the accumulator, they must be purchased separately. • The Model 111.
5.0 Installation Item Description 1 Flange Mounting Bolt 2 Flange Mounting O-rings 3 Accumulator Mounting Bolts (4) 5.1.1.0 Series 111 Accumulator Installation Procedure Required equipment The following equipment is required for accumulator installation: • Open-end wrench and strap wrench (for the Model 111.11B) • Hex key set and torque wrench (for the Model 111.
6.0 Maintenance Topics: • • • • • Series 111 Accumulator Maintenance Guidelines..................................................................................30 Check the Accumulator Precharge........................................................................................................32 About Changing the Precharge Pressure..............................................................................................35 Purge Fluid from the Gas Chamber...........................................
6.0 Maintenance 6.1.0 Series 111 Accumulator Maintenance Guidelines Maintaining the proper pressure level for your accumulators is essential for optimum system performance and component life. Review the following figure to familiarize yourself with the accumulator components and their locations. Also review the following guidelines before performing any procedure.
6.0 Maintenance displacement, and duration. Start with one month intervals until you determine that another interval is more appropriate. • Maintain a log book on the condition of the precharge at each check. Use this data to determine if the time between checks should be increased or decreased and if maintenance is required. • Because the precharge pressure level varies with a temperature change, the level should always be checked at the same temperature.
6.0 Maintenance maintained within the limits, remove the fluid and charge the accumulator. If the levels are again exceeded at the first check interval, replace the piston seals after the initial fluid has been changed. • If the precharge pressure level decreases at each check interval, this indicates gas leakage to the fluid side. When the precharge pressure level cannot be maintained within the limits stated in the previous guidelines, replace the accumulator piston seals.
6.0 Maintenance Accumulator Precharge Item Description 1 High Pressure Gage 0–21 MPa (0–3000 psi) 2 Low Pressure Gage 0–2.1 MPa (0–300 psi) 3 Gage Protector (factory set to limit pressure to the gage to approximately 1.4 MPa (200 psi) 4 Extension Hose 5 Check Valve: This valve will be either a poppet-type valve or a core-type valve.
6.0 Maintenance Item Description C Close 12 Customer supplied items 13 Nitrogen Bottle Valve 14 Nitrogen Bottle 15 Nitrogen Bottle Pressure Gage 16 Regulator Output Pressure Gage 17 Regulator Output Pressure Valve 18 Regulator Shut-Off Valve 19 Nitrogen Supply Hose 20 Input Check Valve 21 Bleed Valve O C Open Close 6.2.1.0 Check the Series 111 Accumulator Precharge This procedure is a continuation of "Check the Accumulator Precharge.
6.0 Maintenance Non-MTS accumulators typically use either a poppet–type valve or a core–type valve. 1. Determine which type of gas pressure valve is present on the accumulator and connect the charging kit chuck valve to the accumulator valve stem. 2. Open the locknut (poppet-type) or chuck valve (core-type). Note: The poppet-type valve opens by turning the locknut counterclockwise and closes by turning the locknut clockwise.
6.0 Maintenance 1. Slowly open the bleed valve on the accumulator charging kit until gas begins to escape. When the pressure reading on the appropriate pressure gage drops to the level required, close the bleed valve. 2. Close the locknut (or close the chuck valve if you have a core-type valve). Open the bleed valve on the accumulator charging kit and remove the chuck valve from the accumulator. 3. Install the valve stem cap and protective cover. 6.3.2.
6.0 Maintenance 6.4.0 Purge Fluid from the Gas Chamber Piston-type accumulators may collect hydraulic fluid in the gas chamber, which then reduces the gas volume of the accumulator. The fluid should be purged from the gas side if a pressure check procedure shows one or more of the following: • A consistent trend of pressure being higher than expected. • Precharging requires smaller volumes of gas than expected to obtain a desired pressure level. • Fluid is expelled from a gas valve during gas venting.
6.0 Maintenance 6.5.0 Remove the Accumulator Warning: Accumulators are pressurized devices. Pressurized accumulators and their parts can become lethal projectiles if disassembled and can cause death to persons and/or damage to equipment. Do not remove an accumulator that is pressurized. Completely remove hydraulic pressure and discharge the accumulator before any parts, except the protective cover and valve stem cap, are removed. 1.
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