HYD presentation (Master II)
- 1. Slack & Parr 2015 Hydraulic Flow dividers
- 2. Slack & Parr is a privately owned UK based company. We were formed in 1917 and we have been involved in the production of high precision gear metering pumps and flow dividers since the late 1940s. Slack & Parr Ltd is internationally recognised as a leading designer and manufacturer of high precision geared flow dividers for many industries. Our pumps are in service worldwide and our customers include some of the most prestigious names in their industries
- 3. Company Commitment Towards our Customers To strive to exceed our customers expectation in all we do. Towards our Product To offer, design, manufacture and support the most suitable, high quality product for our customers applications. Towards our employees To provide a safe working environment and to provide all training opportunities where needed. To continue to provide a steady new supply of engineers into the company via out credited Apprentice Training Scheme.
- 4. What is a flow divider A flow divider ensures a controlled and even movement of a number of Hydraulic rams.
- 5. Overview Large capacity (FDL) 2 16 outlets subject to pressure drops 12 - 30cc/rev Maximum pressure 345 bar Small capacity (FDR) 2 16 outlets subject to pressure drops 2 - 9cc/rev Maximum pressure 345 bar
- 6. Exploded view of the FDL flow divider
- 7. Exploded view of the FDR flow divider
- 8. Principle of a rotary geared flow divider Speed of rotation can be as low as 750 rpm and maximum is 3000 rpm, a flow divider should be selected for running between the speeds for maximum efficiency The rotary gear flow divider consists of two or more gear sections connected along a common shaft. Each section is fed from a common inlet port and has a separate outlet port. Due to the fact that the gear sections are rotating on a common shaft , the rotation speed and hence the fluid displacement is identical for each section. This type of flow division gives a much higher accuracy than spool type flow dividers. A rotary flow divider has higher accuracy than a spool type as the sliding spool type relies on pressure compensation for accuracy where as the rotary type uses precision ground accurate clearances for efficiency.
- 9. Principle of a rotary geared flow divider All flow dividers are supplied with relief valves on each section, which can be used to automatically synchronise multiple cylinders at the end of their stroke. When a cylinder reaches the end of its stroke, the pressure in that section will increase until the relief valve opens, the flow in that section will then be taken through the relief valve and back to tank. The flow in the other sections will continue until they also reach the end of their stroke and the cylinders will now be synchronised.
- 10. Features of a rotary geared flow divider Generate an ever improving design of specialised high efficiency geared flow dividers. Our flow dividers are designed and manufactured with particular attention to precision ground surface finishes on gear teeth and plate faces which produce tight clearances giving a much higher efficiency over the competition. Typical competitor hobbed gear Slack & Parr fully ground gear ISO 9 gear Ground bore but hobbed gear teeth. Gear teeth tolerance 0.002 ISO 5 gear Ground faces, bore and gear teeth. Gear teeth tolerance 0.0005
- 11. Features of rotary geared flow dividers Rotary flow dividers meter the inlet flow from a single supply into 2 or more output of equal or unequal flows
- 12. Features of rotary geared flow dividers The two ranges of flow divider is of modular construction and interchangeable parts. A number of stages can provide very large flow ranges. ORDERING CODE No. OF OUTLETS MINIMUM INLET MAXIMUM INLET GALLONS/MIN. GALLONS/MIN. FDR 2/2 FDL 2/30 2 0.8 11.9 3.2 47.6 FDR 3/2 FDL 3/30 3 1.2 17.8 4.8 71.3 FDR 4/2 FDL 4/30 4 1.6 23.8 6.3 95.1 FDR 5/2 FDL 5/30 5 2 29.7 8 118.9 FDR 6/2 FDL 6/30 6 2.4 35.7 9.5 142.7
- 13. Typical applications for a rotary geared flow divider Lifting arms (Davit technology) Welin Lambie Pipe/Drill clamping in the Oil industry - Weatherford Hydraulic press/stamping Pegler plumbing fittings Agricultural machinery Larrington trailers/Hoof trimming Railroad track laying Network rail (UK) Waste compactors Axis Hydraulics Lubrication systems Tunnel boring systems Herrenknecht Sub sea machinery Pipe laying platforms Subsea Innovations Steel mills movement of steel ingots/furnace doors Tata Steel Triple deck car transporter trailers - Transporter engineering
- 14. Important features Precision flow dividers for high accuracy . Interchangeable with many existing Installations with standard SAE & ISO fittings Gears manufactured from fully hardened AISI 440B material for long life . Stainless steel material combinations are available on request Full technical support and repair facilities in: UK North Carolina USA China
- 15. Gear grinding Lapping operation Key manufacture processes
- 16. Gear CMM Inspection Full testing facilities Key manufacture processes
- 17. Any questions?
Editor's Notes
- #3: Slack & Parr is a privately owned UK based company. We were formed in 1917 and we have been involved in the production of high precision gear metering pumps since the late 1940s. Our pumps are in service worldwide and our customers include some of the most prestigious names in their industries. In the last 10 years significant investment has been made in both plant and personnel to create a state-of-the-art manufacturing facility that we believe is second to none in the industry. As well as regular, standard applications we can also offer metering pumps for use in much more demanding environments, including very aggressive and corrosive fluids. We can also guarantee highly consistent performance even in extremely demanding applications where pressures and viscosities may be beyond the capabilities of most other types of pumps.
- #4: 油 Nowadays Slack & Parr Ltd is internationally known as a leading manufacturer of precision products. Slack & Parr Ltd consists of a group of companies with the core business in the design and manufacture of metering pumps for man-made fibres and other industries; and Hydraulic flow dividers. 油 Company Vision 油 To be the customers first choice for high precision geared metering pumps and precision flow dividers. 油 Company Commitment 油 Towards our Customers To strive to exceed our customers expectation in all we do. 油 Towards our Product To offer, design, manufacture and support the most suitable, high quality product for our customers applications. 油 Towards our employees To provide a safe working environment and to provide all training opportunities where needed. To continue to provide a steady new supply of engineers into the company via out credited Apprentice Training Scheme.
- #16: Jig grinding