Cement Superplasitcizer,concrete mix chemical,cement retarder,cement admixtures,concrete additives for strength Shanghai Hongyun New Construction Materials Co., Ltd , https://www.hongyunpce.com
KCB series gear pump string oil how to do
As the KCB series gear pump shaft extension spline and gearbox output shaft Huacao effective contact length is short, while the gear pump torque transmission work larger, the spline to withstand large torque squeeze wear and tear or rolling key, resulting Giant heat, resulting in skeleton seal rubber lip burn, aging, resulting in channeling oil. It is recommended that OEMs use gear pumps to check the spline strength of the gear pump shaft to ensure sufficient effective contact length. Because the shaft diameter of the gear shaft and the clearance of the inner hole of the seal ring are small, larger solid particles in the oil enter between them, resulting in the abrasion of the inner hole of the seal ring, scratching or rotation with the shaft, causing the pressure oil of the secondary seal to enter the low pressure zone Skeleton seal), resulting in seal breakdown, this time should be filtered or replaced with new anti-wear hydraulic oil. Because the shaft diameter of the gear shaft and the clearance of the inner hole of the seal ring are small, larger solid particles in the oil enter between them, resulting in the abrasion of the inner hole of the seal ring, scratching or rotation with the shaft, causing the pressure oil of the secondary seal to enter the low pressure zone Skeleton seal), resulting in seal breakdown, this time should be filtered or replaced with new anti-wear hydraulic oil. When the host load working time is too long and the fuel tank surface is low, the oil temperature can be increased to 100 ℃, resulting in thinning oil, aging oil seal lips, resulting in channeling oil; should be checked regularly fuel tank level, Avoid excessive oil temperature. Gear pump outside the stop and variable speed pump stop and gear pump spline and gearbox spline shaft spline, the gap between the two is reasonable, all on the gear pump oil have an impact.
Manufacturing method
Using methyl naphthalene and sulfur trioxide as raw materials, the product was synthesized by sulfonation, condensation, neutralization and drying.
The degree of polymerization of water reducing agent is generally about 6-12, that is: n= 6-12, if the degree of polymerization is 1-3, it is used as a dispersant.
Concrete admixtures can be divided into four categories according to their main functions:
1. Admixtures to improve the variable performance of concrete mixing: including various water reducing agents, air entrainment agents and pumping agents.
2. Adjusting concrete setting time, hardening performance of admixtures: including retarding agent, early strength agent, accelerator and so on.
3. The admixtures to improve the durability of concrete include air entraining agent, water repellent agent, and rust inhibitor.
4. Other additives to improve the performance of concrete: including air entrainment agent, expansion agent, antifreeze agent, colorant, waterproofing agent and pumping agent.
According to the naming and definition of (GB8075-87) admixtures, admixtures can be divided into 16 names, which are respectively defined as follows:
1. Ordinary water reducing agent: an admixture that can reduce the amount of water used in mixing under the condition of the same slump of concrete;
2. Early strength agent: the admixture that accelerates the early strength development of concrete;
3. Retarding agent: admixture for extending the setting time of concrete;
4. Air entraining agent: an admixture which can introduce a large number of uniformly distributed, stable and closed micro bubbles in the mixing process of concrete;
5. High efficiency water reducing agent: admixture which can greatly reduce the water consumption of the mixture under the same conditions of concrete collapse;
6. Early strength water reducing agent: both early strength and water reducing function of water reducing agent;
7. Retarding and water reducing agent: a water reducing agent with both retarding and water reducing functions;
8. Air-entraining and water-reducing agent: admixture with air-entraining and water-reducing functions;
9. Waterproofing agent: can reduce the water permeability of co