| Home>Bearing knowledge>Application of alloy on gear pump |
Application of alloy on gear pump
Source: China Bearing Network Time: 2013-07-21
| /*250*250 was created on 2017/12/25*/ var cpro_id = 'u3171089'; |
Keywords: plain bearing bearing alloy tin bronze gear pump
1 Introduction Bushings and bushings on various mechanical equipments in China; widely used tin bronze for a long time; for example; various types of gear pumps; ZCuSn6Pb6Zn3 or ZCuSn5Pb5Zn5 tin bronze casting bushing blanks have been used for a long time; Lead disposal process; then installation and use; production process mess; cost high. Align this situation; we have developed a new type of sliding bearing alloy (code TZS88); replace tin bronze casting bush, bushing blank; direct installation after machining The process is simple; the cost of the sleeve is reduced by more than 50%.
2 Composition and function of TZS88 alloy
(1) Composition of TZS88 alloy The alloy is based on aluminum; rich in elements such as Cu, Sn, Ni, Fe, Ti, etc.; through proper disposal; it has high strength, hardness, plasticity and superior sliding bearing function. .
(2) The function of TZS88 alloy tested a number of functional data of TZS88 alloy; listed in Table 1; compared with several conventional sliding bearing alloys. The strength, hardness, plasticity and tin bronze of TZS88 alloy are appropriate. The coefficient of conflict is much lower than that of tin bronze; it is close to tin-based babies.
The thermal conductivity is significantly better than that of tin bronze and tin-based babbitt. The density is only 1/3 of that of tin bronze. The TZS88 alloy has excellent sliding bearing function; it can replace the tin bronze, the bushings, bushings and other mechanical parts.
3 Production and application of TZS88 alloy bushing in gear oil pump
(1) Development test of TZS88 alloy bushing mounted gear pump: CB50 gear oil pump is selected as experimental target; additional speed n=1500r/min; additional pressure p=10MPa and p=16MPa. May 1993; The TZS88 alloy bushing blanks of the two gear oil pumps are processed according to the original design drawings; 100 sets are to be installed for sampling experiments. According to the rules of the gear pump industry standard announced by the former National Machinery Industry Committee; No-load displacement experiment, power test, over-speed test, over-pressure test, high temperature test, high temperature impact test, high temperature overload test, external leakage view test width and body view experiment. After successfully completing the above experimental project; The collapse of the two gear pumps is as follows: the primary parts are not fatigued; the conflicting pairs are not burned, detached and significantly scratched; the pump broom marks do not exceed the two-axis intermediate connection; fit the gear pump industry standard rule.
(2) Durability test of TZS88 alloy bushing mounted gear oil pump After the development experiments of the above two gear pumps were successful, one of them was randomly selected for durability test.
1 experimental equipment: CB50 pump life test bench.
2 Experimental conditions Experimental pressure: The additional pressure of the gear pump is divided into p=10MPa and p=16MPa.
Experimental speed: n=1500r/min,
Experimental oil: N46# anti-wear hydraulic oil (viscosity ν40=39.9mm2/s),
Experimental oil temperature: 80 ° C ~ 90 ° C,
Impact frequency: 25T/min.
3 The durability test condition of the gear pump is under the above experimental conditions; the two kinds of CB50 gear pumps are successively subjected to the durability impact test. During the experiment, the gear pump tested has no external leakage and other abnormal phenomena. .
The impact times of the two gear pumps exceeded 400,000 times; at 50 °C; the volumetric power of the gear pump with p=10 MPa was 92.3%; the volumetric power of the gear pump with p=16 MPa was 92.20%. .
4 TZS88 alloy bushing mounted gear pump production status with TZS88 alloy bushing installation additional speed n = 1500r / min; additional pressure is divided into p = 10MPa and p = 16MPa two types of CB50 gear pump; in development experiments After the success of the durability test, 100 sets were installed; the factory inspection was carried out; the information was put on the market to collect and use the information. The user has been used for one year; the function is very good. Therefore, the TZS88 alloy shaft is gradually expanded. Output of the set; installation of gear pump on the market. Since 1993; replace the ZCuSn6Pb6Zn3, ZCuSn5Pb5Zn5 tin bronze production bushing with CTZ50 gear pump with TZS88 alloy; by December 1998; the number of products put on the market has reached more than 50,000 .
5 Economic analysis of TZS88 alloy bushings
The density of TZS88 alloy is only 1/3 of that of tin bronze; the same amount of TZS88 alloy is compared with tin bronze; the volume of the former is three times that of the latter; the number of sleeves that the former can produce the same scale must also be the latter three. The primary raw material for smelting tin bronze is much higher than the primary raw material of TZS88 alloy. The melting temperature of TZS88 alloy is lower than 800 °C; the melting temperature of tin bronze is higher than 1100 °C; obvious; the energy consumption of the former is lower than In the latter case, gear bushings are made of tin bronze; after machining, the inner hole must be plated with lead; while the bushing made of TZS88 alloy does not require lead plating. The above elements can be summarized; it can be thought to replace tin bronze with TZS88 alloy. Making gear pump bushings; at least 50% more production cost.
6 Conclusion
TZS88 plain bearing alloy; has excellent sliding bearing function; can completely replace some copper alloys (such as ZCuSn6Pb6Zn3, ZCuSn5Pb5Zn5, ZCuSn10P1, etc.) to make all kinds of bushings and bushings; can be used at higher sliding speeds and higher working temperatures ( For example, gear pumps, etc. under working conditions.
Replace some tin bronze with TZS88 alloy to make mechanical parts such as bushings and bushings; at least 50% of the bushings can be reduced.
Recommend to friends comments close window
| Bearing related knowledge |
| Simple analysis of single ball bearing and oil-impregnated bearing Identification of electric fan bearing on motor bearing wear market NSK bearing rust to damage the cause of the bearing repair |
This article links to http://
Please indicate the bearing network http://
Previous:Talk about "How to choose the type and variety of imported bearings"
Next: Several commonly used bearing types (6)
You can find a best way to experience your bathe --- whirlpool or air bubble. The whirlpool bath gives bathers a therapeutic, invigorating massage. If you work hard and play hard, a whirlpool bath is one of the best things you can do for your body. When you choose a pure air bath, you give yourself the caressing sensation of warmed air inside thousands of bubbles. It`s a gentle, full-body experience and a pure pleasure.
Whirlpool & Air Bath Tubs
Acrylic Whirlpool Bathtubs,Jacuzzi Bathtubs,Air Bath Tubs,Hydropathic Tubs
Ningbo Waltmal Sanitary Wares Co., Ltd. ,