Vane pump fluid suction and discharge module capable of improving radial bearing capacity of rotor

Abstract

A vane pump fluid suction and discharge module with improved rotor radial bearing capacity is composed of a stator assembly and a rotor assembly, the rotor assembly is supported on the stator assembly through bearings on the two sides, the installation geometric accuracy, such as coaxiality, of the rotor assembly relative to the stator assembly is improved, the axial size of the module is greatly shortened, and the installation cost is reduced. And the radial force borne by the rotor acts on the stator assembly instead of acting on the transmission shaft, so that the transmission shaft only provides torque and does not bear the radial force, the working condition is greatly improved, and the service life is prolonged. The suction and discharge module for sucking the fluid from the low-pressure area of the pump chamber and discharging the fluid from the high-pressure area is small in size, high in efficiency and rapid and convenient to install, can be used for conveying gas to form a vacuum pump or an air pump, and can also be used for conveying liquid to form a water pump or an oil pump.

Description

[0001] The invention relates to a positive displacement pump, in particular to a modular vane pump. Background Art

[0002] The vanes in the conventional vane oil pump known today use the centrifugal force generated by the high-speed rotation of the offset rotor to extend out of the radial grooves of the rotor, thereby achieving the purpose of conveying oil. Due to the high-speed rotation, the vanes produce "high-speed friction" and the medium is prone to heat up. Therefore, the vane pump can only be barely suitable for conveying oils with good lubricity, but cannot be used for conveying water with poor lubricity.

[0003] Patent No. ZL 201610794838.1 proposes a patent for a "modular vane pump". The patent proposes a new vane pump structure in which the end faces and side faces of the blades will not generate heat due to high-speed friction. It can be used to transport both oil and water, has excellent self-priming performance, stable operation and long service life.

[0004] However, the new structure also has its shortcomings. The length of the pump blades is longer, that is, the length of the rotor is longer. When the output pressure is required to be increased, the greater the pressure difference between the high-pressure area and the low-pressure area in the pump chamber, the greater the radial force borne by the rotor. This radial force finally acts on the drive shaft, and the higher the requirements for the rigidity and strength of the drive shaft, the shorter the service life of the drive shaft. Summary of the invention

[0005] The purpose of the present invention is to improve the stress condition and enhance the bearing capacity of the rotor to radial force.

[0006] In order to achieve the above-mentioned purpose, the present invention proposes a vane pump fluid suction and discharge module with improved rotor radial bearing capacity, which consists of two parts: a stator assembly and a rotor assembly. The stator assembly consists of an upper baffle 1 and a lower baffle 2 that separate the pump chamber into a low-pressure zone and a high-pressure zone, and a front baffle 3 and a rear baffle 4 fixedly mounted thereon. The front baffle 3 and the rear baffle 4 are both provided with arc triangular equal-width cam slot plates 5 coaxial with the rotor assembly on the inner side facing the rotor assembly. The rotor assembly consists of a rotor 6, two side plates 7 fixedly mounted on both sides of the rotor 6 and rotating synchronously, and a plurality of blades 8 slidably fitted in the radial grooves of the rotor 6. Coaxial rotating shafts 9 are provided on both sides of the inner ends of the blades 8. Rollers 10 on the outer sleeves of the rotating shafts 9 on both sides are respectively inserted into the grooves of the arc triangular equal-width cam slot plates 5 on the front baffle 3 and the rear baffle 4. The special feature is that the rotor assembly is supported on the stator assembly by bearings 11 on both sides.

[0007] The number of bearings 11 on both sides in the present technical solution can be multiple rows.

[0008] In the above structure, .

[0009] The positive effects of the present invention are:

[0010] 1. The radial force of the rotor acts on the stator assembly instead of the drive shaft. The drive shaft only provides torque and does not bear radial force, which greatly improves the working conditions and extends the service life.

[0011] 2. The rotor assembly is supported on the stator assembly by bearings 11 on both sides, which can improve the installation geometric accuracy of the rotor assembly relative to the stator assembly, such as coaxiality.

[0012] 3. The rotor assembly is supported on the stator assembly through bearings on both sides, which can increase the discharge pressure of the pump. For example, using double-row bearings can achieve higher discharge pressure than single-row bearings.

[0013] 4. In this technical solution, the bearings on both sides that were originally far apart are moved into the stator assembly, which greatly shortens the axial size of the module and is conducive to the miniaturization of the module.

[0014] 5. Changing the bearing type can also help increase the discharge pressure. For example, using roller bearings is more conducive to increasing the discharge pressure than radial bearings. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural diagram of an embodiment of the present invention.

[0016] Figure 2 This is a structural diagram of the rotor supported on the stator by double-row bearings on both sides. DETAILED DESCRIPTION

[0017] Figure 1 It is a structural diagram of an embodiment of the present invention, which consists of two parts: a stator assembly and a rotor assembly:

[0018] The stator assembly consists of an upper partition tongue 1 and a lower partition tongue 2 that separate the pump chamber into a low-pressure zone and a high-pressure zone, and a front partition plate 3 and a rear partition plate 4 fixed to the two. The front partition plate 3 and the rear partition plate 4 are both equipped with an arc triangular equal-width cam groove plate 5 coaxial with the rotor assembly on the inner side facing the rotor assembly.

[0019] The rotor assembly consists of a rotor 6, two side plates 7 fixed on both sides of the rotor 6 and rotating synchronously, and a plurality of blades 8 slidingly fitted in radial grooves of the rotor 6. Coaxial rotating shafts 9 are formed on both sides of the inner ends of the blades 8, and rollers 10 are mounted on the rotating shafts 9 on both sides.

[0020] After assembly, the rollers 10 on the rotating shafts 9 on both sides of the inner ends of the blades 8 in the rotor assembly are respectively inserted into the grooves of the arc triangle equal width cam groove plates 5 on both sides of the stator assembly.

[0021] The rotor assembly is supported on the stator assembly via bearings 11 on both sides.

[0022] When the power machine drives the rotor to rotate, the blades, under the control of the arc triangle equal-width cam slot plate, regularly extend and retract from the radial slots of the rotor, thereby achieving the purpose of sucking fluid from the low-pressure area of ​​the pump chamber and outputting fluid from the high-pressure area, over and over again.

[0023] Figure 2 This is a structural diagram of the rotor supported on the stator by double-row bearings on both sides.

[0024] The figure shows that the rotor is supported by double-row bearings 11 on both sides, and the rotor can withstand greater radial force, which can meet the user's demand for greater discharge pressure.

[0025] In addition to being highly efficient, this volumetric fluid suction and discharge module has strong self-priming capabilities and can be used to suck and discharge liquids and gases. When sucking and discharging gases, it can form a vane-type modular air pump and a vane-type modular vacuum pump. When sucking and discharging liquids, it can form a vane-type modular water pump and a vane-type modular oil pump. These vane-type modular pump structures are all within the scope of rights protected by this patent.

Claims

1. A vane pump fluid suction and discharge module with improved rotor radial bearing capacity, comprising a stator assembly and a rotor assembly, wherein the stator assembly comprises an upper baffle (1) and a lower baffle (2) for dividing a pump chamber into a low-pressure zone and a high-pressure zone, and a front baffle (3) and a rear baffle (4) fixedly mounted thereon, wherein the front baffle (3) and the rear baffle (4) are both provided with arc triangular cam groove plates (5) coaxial with the rotor assembly on the inner side facing the rotor assembly, wherein the rotor assembly comprises a rotor (6), two side plates (7) fixedly mounted on both sides of the rotor (6) and rotating synchronously, and a plurality of blades (8) slidably fitted in radial grooves of the rotor (6), wherein coaxial rotating shafts (9) are provided on both sides of the inner ends of the blades (8), and outer sleeve rollers (10) of the rotating shafts (9) on both sides are respectively inserted into the grooves of the arc triangular cam groove plates (5) on the front baffle (3) and the rear baffle (4), wherein the rotor assembly comprises a rotor (6), two side plates (7) fixedly mounted on both sides of the rotor (6) and rotating synchronously, and a plurality of blades (8) slidably fitted in radial grooves of the rotor (6), wherein coaxial rotating shafts (9) are provided on both sides of the inner ends of the blades (8), and the outer sleeve rollers (10) of the rotating shafts (9) on both sides are respectively inserted into the grooves of the arc triangular cam groove plates (5) on the front baffle (3) and the rear baffle (4), wherein the rotor assembly comprises a rotor (6), two side plates (7) fixedly mounted on both sides of the rotor (6) and rotating synchronously, and a plurality of blades (8) slidably fitted in radial grooves of the rotor (6), wherein the inner ends of the blades (8) are provided with coaxial rotating shafts (9), and the outer sleeve rollers (10) of the rotating shafts (9) on The rotor assembly is supported on the stator assembly via bearings (11) on both sides.

2. According to claim 1, a vane pump fluid suction and discharge module with improved rotor radial bearing capacity, characterized in that: The number of the bearings (11) on both sides is multiple rows.

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