How to solve the leakage problem of external gear pump, how to solve the leakage problem of external

Design movable side panels and use pressure to control clearance.

There are many types of gear pumps, but the working principle is the same, and the structure is similar. The main components are a rotating impeller and a fixed pump casing. The impeller is a component that works directly on the liquid, with 4-8 back-curved blades on it, and the pump casing is a snil-shaped energy transfer device.

The gear pump needs to be filled with the conveyed liquid to the shell before starting, and after starting, the pump shaft drives the impeller to rotate together, forcing the liquid between the blades to rotate. Under the action of inertial centrifugal force, the liquid is thrown from the center of the impeller to the periphery and obtains energy, so that the static pressure of the liquid flowing to the periphery of the impeller increases, the flow rate increases, the working principle of the gear pump, the working principle of the gear pump manufacturer, can be as high as 15--20ms.

After the liquid leaves the impeller and enters the pump casing, the liquid is decelerated due to the gradual expansion of the flow channel in the casing, and part of the kinetic energy is converted into static pressure energy. As long as the impeller rotates continuously, the liquid is continuously sucked in and discharged. The reason why gear pumps can transport liquids is mainly by relying on a high-speed rotating impeller, and the liquid is obtained by the action of inertial centrifugal force to increase the pressure.

Gear pumps are driven by low-pressure gases (2-8 bar) from large-area pistons to produce high-pressure gases and liquids on small-area pistons. It can be used for compressed air and other gases, and the output air pressure can be adjusted infinitely by actuating the air pressure. Gas pipeline gear pumps have single-acting pumps and double-acting pumps.

The double-acting pump piston compresses the gas in both reciprocating strokes. When the driving gas acts on the air piston, the working piston can obtain a large output flow rate with the air drive.

The gear pump has the following characteristics: simple maintenance: the gear pump has few parts and seals, simple maintenance and low cost.

Cost-effective: The gear pump has the characteristics of high output performance and low cost. Adjustable:

The gear pump output pressure and flow rate are accurately regulated by a pressure regulating valve that drives the gas. Adjust the drive air pressure, stainless steel pump, so that the output pressure of the air pressure pipeline gear pump is precisely adjusted between the pre-increase air pressure and the maximum output pressure. High output pressure:

The maximum working pressure of the pneumatic liquid pipeline gear pump can reach 700 MPa, and the maximum working pressure of the triple screw pump and the pneumatic gas pipeline gear pump can reach 300 MPa. Excellent material: The high-pressure part of the gear pump is made of hard aluminum alloy.

The high-pressure plunger is made of stainless steel. And it adopts double sealing. The material of the key parts can be selected according to the medium nature.

Multiple gas drives: compressed air, nitrogen, water vapor, etc. Large output traffic:

The pneumatic in-line gear pump only needs to compress the air. All "O" rings of the same series of pumps, the wear parts of the repair kit can be replaced with each other, which greatly reduces the repair cost. Pneumatic in-line gear pumps do not require the use of lubricants.

Flexible application: Gear pumps range from simple manual to fully automated, gear pumps are suitable for all applications and are easily compatible with the customer's system. Most models of pumps in the same series have interchangeable air motors.

What measures should be taken to reduce leakage in external gear pumps during design and manufacturing to maintain face clearance and reduce leakage? Design movable side panels and use pressure to control clearance. It's going to fall.

The pressure should not be too large during the design, the process should be good, and the matching accuracy should be high.

1) The gland is installed incorrectly, which plugs the oil drain holes on the front cover and the back cover.

2) The outer diameter of the sealing ring is too loose with the aperture of the sealing seat.

3) The direction of the pump body is reversed, so that the oil pressure port is connected to the unloading ditch, and the pressure is formed to flush out the sealing ring.

4) The oil quality is not clean, and the oil return is not smooth.

5) The thread fit of the tubing is not tight. As an important part of the gear pump, the seal of the gear pump plays the role of fixing the main shaft and sealing the medium. In case of leakage, first check whether the selection and installation of the seal are correct, and secondly, check whether the working conditions are running smoothly.

The outer diameter of the sealing ring and the aperture of the sealing seat are too loose to replace the sealing ring; The oil quality is not clean, the oil return is not smooth, the new oil is replaced, and the sealing ring is replaced; The gland is installed incorrectly, and the leakage on the front and rear covers is blocked, and the gland is reinstalled; The direction of the pump body is reversed, so that the pressure port is connected to the unloading ditch, and the assembly direction of the pump body is corrected when the pressure is formed to flush out the sealing ring; The thread fit of the tubing is not tight, and the PTFE raw meal tape is wound on the external thread of the tubing during installation.

There are three ways for a low-pressure gear pump to leak:

One is the end face gap between the gear end face and the front and rear end covers, the second is the radial gap between the tooth top and the pump inner wall, and the third is the gap between the meshing line of the two wheel tooth meshes.

Leakage method of external gear pump:

1. Leakage of radial clearance between the surface of the pump body and the top of the tooth.

2. Leakage of the gap between the tooth surface meshing.

3. Leakage of gear end face clearance (the largest leakage).

Hello, the main reasons for the damage of the internal gear pump are: internal damage to the pump, loose gear rings, wear, damage to the moving bearing, damage to the oil seal, overload caused by poor operation, wrong wiring, overload operation, unqualified air core oil quality, high temperature and other may cause damage to the internal gear pump. For different reasons, different treatment methods should be made, such as checking the internal damage of the pump, replacing damaged parts, strengthening operating procedures, optimizing wiring connections, and replacing better oil quality.

Hello dear, there can be several reasons for the damage of the internal gear pump, and here are some possible reasons:1The design of the pump was not reasonable, and the pump caused additional operating loads, resulting in damage to the parts of the pump.

2.The torque load of the master pump is too large, which may be due to the excessive viscosity of the oil, the unreasonable design of the pump, the bending of the drive shaft, etc., which may cause damage to the pump. 3.

Downstream filters were too clogged, forcing the pumps to expend more power to force the first to pass through these filters, which led to wear and damage to the pump parts. 4.Overheating of the pump during operation can be caused by insufficient lubrication, poor circulation, or improper design of the pump.

5.Some pumps fail, causing others to suffer excessive mechanical or hydraulic shocks, or excessive pump pressure causing physical damage. 6.

The selection of the material of the part is not suitable or the quality is not up to standard, resulting in premature wear or damage of the part. All of the above factors may cause damage to the internal gear pump, so if you find that the pump is abnormal, it is recommended to check it in time to find out the specific cause and take measures to repair it.

1. Leakage of radial clearance between the surface of the pump body and the top of the tooth.

2. Leakage of the gap between the tooth surface meshing.

3. Leakage of gear end face clearance (the largest leakage).