A hydraulic pressure gauge is a device used to measure the pressure of a hydraulic system. It consists of a dial or digital display that shows the pressure reading in units of force per unit area, such as pounds per square inch (psi) or bar.
The gauge is typically connected to the hydraulic system through a pressure port or a pressure transducer. When the hydraulic fluid flows through the system, it exerts a force on the gauge, which is then converted into a pressure reading on the display.
Hydraulic pressure gauges are commonly used in various industries and applications, such as automotive, manufacturing, construction, and aerospace. They are essential for monitoring the pressure levels in hydraulic systems to ensure proper functioning and prevent damage or failure.
Some hydraulic pressure gauges are designed for specific pressure ranges, while others are adjustable or have a wide range of measurement capabilities. They may also have additional features like maximum pressure indicators, peak hold functions, or digital interfaces for data logging.
Overall, hydraulic pressure gauges play a crucial role in maintaining the performance and safety of hydraulic systems by providing accurate pressure readings for troubleshooting, maintenance, and operational purposes.
Pressure Gauge,High Pressure Gauge,High Pressure Oil Gauge,Ultra High Pressure Gauge Yantai Dongyue Hydraulic Technology Co., Ltd , https://www.deeleap.comApplication of Alloy in Gear Pumps
**Abstract:** This article introduces the composition and superior performance of TZS88 sliding bearing alloy. It replaces traditional tin bronzes like ZCuSn5Pb5Zn5 and ZCuSn10P1 to produce bearing bushes and bushings, simplifying the manufacturing process and reducing costs by over 50%. The alloy has been successfully applied in gear pumps operating at high speeds and temperatures.
**Keywords:** plain bearing; bearing alloy; tin bronze; gear pump
**1. Introduction**
For many years, tin bronze has been widely used in bushings and bearings across various mechanical equipment, including different types of gear pumps. For example, ZCuSn6Pb6Zn3 or ZCuSn5Pb5Zn5 casting bushing blanks have long been used in such applications. However, the production process is complex, with high costs due to lead disposal and installation. To address this issue, a new type of sliding bearing alloy (TZS88) has been developed. It allows for direct machining and installation, significantly simplifying the process and cutting sleeve costs by more than 50%.
**2. Composition and Function of TZS88 Alloy**
(1) **Composition**: TZS88 is an aluminum-based alloy enriched with elements like Cu, Sn, Ni, Fe, and Ti. Through proper processing, it exhibits high strength, hardness, ductility, and excellent sliding bearing properties.
(2) **Performance**: Testing data shows that TZS88 has suitable strength, hardness, and ductility compared to conventional bearing alloys. Its friction coefficient is much lower than that of tin bronze, approaching that of tin-based babbitts. Additionally, its thermal conductivity is significantly better than both tin bronze and tin-based babbitt, and its density is only one-third of that of tin bronze. These features make TZS88 an ideal replacement for tin bronze in bushings and other mechanical components.
**3. Production and Application of TZS88 Alloy Bushings in Gear Oil Pumps**
(1) **Development and Testing**: The CB50 gear oil pump was selected as the test model. With an additional speed of 1500 r/min and pressures of 10 MPa and 16 MPa, 100 sets of TZS88 alloy bushings were installed for testing. According to industry standards, the tests included no-load displacement, power, over-speed, over-pressure, high-temperature, and leakage checks. All tests were passed successfully, with no signs of fatigue, burning, or damage to the contact surfaces.
(2) **Durability Test**: A durability test was conducted on one of the tested pumps. Under conditions of 10 MPa and 16 MPa pressure, 1500 r/min speed, and 80–90°C oil temperature, the pump operated without external leaks. It exceeded 400,000 impact cycles, maintaining a volumetric efficiency of over 92% under both pressure levels.
**4. Current Production Status**
After successful development and testing, 100 sets of CB50 gear pumps with TZS88 bushings were produced and put into the market. Users reported excellent performance after one year of use. Since 1993, TZS88 alloy has gradually replaced tin bronze in CTZ50 gear pumps. By December 1998, over 50,000 units had been sold.
**5. Economic Analysis of TZS88 Bushings**
The density of TZS88 is only one-third of that of tin bronze. This means that three times the volume can be produced using the same amount of material. The primary raw materials for tin bronze are more expensive, and its melting temperature is higher than 1100°C, while TZS88 melts below 800°C, reducing energy consumption. Additionally, tin bronze requires lead plating after machining, which is unnecessary for TZS88. These factors collectively reduce production costs by at least 50%.
**6. Conclusion**
TZS88 sliding bearing alloy offers excellent performance and can fully replace certain copper alloys such as ZCuSn6Pb6Zn3, ZCuSn5Pb5Zn5, and ZCuSn10P1 in making various bushings and bearings. It is particularly suitable for high-speed and high-temperature applications like gear pumps. Replacing tin bronze with TZS88 not only reduces costs by over 50% but also improves efficiency and reliability.
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**Application of Alloy in Gear Pumps**
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Source: China Bearing Network | Time: 2013-07-21