cessna hydraulic pumps manual hydraulic pump small hydraulic pumps

Process / method
Conclusion: After the above discussion, reached the following conclusion
① total stroke reciprocating plunger L is constant, the resolution by the cam lift.
② plunger fuel supply amount per cycle depends on the size of the fuel supply stroke, stroke oil from the camshaft control is variable.
③ oil supply start time does not vary with changes and itinerary changes.
④ roll plunger may change oil end time, and then change the amount of oil.
3. Domestic Series Injection Pump
Domestic Series Piston mainly A, B, P, Z and Ⅰ, Ⅱ, Ⅲ number series. Series is based on a single-cylinder diesel power plans to plead not the same amount of oil to the piston stroke, the pump cylinder base distance and structural type of foundation, and then leave with a different standard diameter of the plunger, constitute several species in a varying the amount of oil fuel pump inside the work cycle, to the satisfaction of the needs of various diesel engines.
Domestic series fuel injection pump operation principle and structure of the same type of base to A-type pump as an example describes the structure and operation principle of a plunger-type fuel pump. Some piston pump consists of four components: cylinder, fuel scheduling organization, the organization and the pump drive
Copper sleeve cylinder piston inserts, you can choose to replace copper sleeve approach equipment. First, a group of at plunger rod diameter trimmed to standard together, then 1000 # sandpaper polished than the outer diameter.
Copper cylinder equipment sets three ways:
(A) loading or copper cylinder plus warm jacket cryogenic kneading, interference device;
(B) adopt a Loctite adhesive with the equipment, which we approach begged copper coat the outer diameter of the outer grooves;
(C) bore tapping, threading copper sleeve outer diameter after coating Loctite glue, screw device.
Piston is a major equipment hydraulic system. It relies on the plunger reciprocates in the cylinder, so that the volume of the cavity sealing operation is changed to the end of the suction pressure oil. Piston pumps with a rated pressure, compact structure, high efficiency and flow conditioning facilitation benefits, it is widely used in high pressure, high flow and traffic demand conditioning occasions, such as hydraulic machines, construction machinery and ships in.
Axial piston pump is to use the drive shaft parallel to the plunger in the plunger bore volume change occurred in reciprocation for the job. Since the plunger and the plunger hole are circular parts, can reach very high precision machining and cooperation, thus high volumetric efficiency, smooth operation, flow uniformity, low noise, operating pressure senior interests, but for the hydraulic oil pollution the more active, the structure is more messy, higher cost.

Melting contact information and copper cylinder sleeve, the device measures as follows:
(A) selection of ground rods, craft mechanical way grinding or amend the bore;
(B) the choice of coordinate boring, boring scratch the cylinder bore;
(C) Selection Reamer correction cylinder bore.

(3) selection of "look engineering technology" approach as follows:
(A) plating techniques: the plunger outer layer of hard chrome plating;
(B) electrical brush technique: Brush the plunger outer wear-resistant materials;
(C) thermal spraying or electric arc spraying or spray: Spray carbon martensite wear-resistant materials;
(D) Laser cladding: the plunger outer cladding alloy powder by high hardness.
(4) no copper sleeve cylinder bore of the cylinder material are mostly ductile iron, prepared amorphous thin film or coating on the cylinder wall. Since the cylinder bore wall with this exceptionally substance, so it tune constituting the hard - hard matching friction deputy