One-way offset blade rotor assembly, prime mover and pneumatic water pump

Abstract

The present invention discloses a one-way offset blade rotor assembly, a prime mover, and a pneumatic water pump. The one-way offset blade rotor assembly comprises: a rotor shaft and a plurality of blades mounted on the rotor shaft, wherein the blades are equidistantly and one-way offset along the circumference of the rotor shaft, the radial offset angle of the blades is 3-15°, and the width of the blades increases with the increase of the offset angle; the prime mover comprises a one-way offset blade rotor assembly, wherein the rotor assembly is mounted in a cylinder body; the pneumatic water pump comprises a prime mover and a pump body, wherein the pump body is integrally connected to the prime mover, and the impeller of the pump body is mounted on the rotor shaft. In the above manner, the present invention can increase the blade width, improve the end face force of the blade, and extend the service life of the blade by more than 3-4 times without increasing the structure, area, and weight of the prime mover, while keeping the assembly dimensions of the prime mover unchanged.

Description

Technical Field

[0001] The invention relates to a unidirectional offset blade type rotor assembly, a prime mover and a pneumatic water pump. Background Art

[0002] For decades, the majority of pneumatic (or air-driven) water pumps used in my country's coal industry have been driven by unidirectional, radially bladed pneumatic (or air-driven) motors. These motors were primarily used in coal mines prone to explosive gas and in chemical plants requiring explosion protection, and their use has gradually grown. While these pneumatic (or air-driven) motors have many advantages, they suffer from lower energy efficiency than other prime movers, are noisy, and require frequent blade replacement, particularly due to the material used.

[0003] The efficiency of the motor has been improved by updating materials, updating blade materials, minimizing the pressure loss of the air motor's intake and exhaust, eliminating compression work during the exhaust process, and improving manufacturing accuracy during processing. However, none of these measures have fundamentally solved the problem of blade service life. Summary of the Invention

[0004] The main technical problem solved by the present invention is to provide a unidirectional offset blade rotor assembly, a prime mover and a pneumatic water pump that can extend the blade life by more than 3-4 times without changing the structure of the prime mover and the premise that the blade material remains the same.

[0005] To solve the above technical problems, the present invention adopts a technical solution: providing a unidirectional offset blade rotor assembly, comprising: a rotor shaft and a plurality of blades assembled on the rotor shaft, wherein the blades are unidirectionally offset and arranged at equal intervals along the circumference of the rotor shaft, the radial offset angle of the blades is 3-15°, and the width of the blades increases with the increase of the offset angle.

[0006] In a preferred embodiment of the present invention, four one-way offset sliding grooves are provided on the rotor shaft, and each blade is respectively assembled in a corresponding sliding groove.

[0007] In a preferred embodiment of the present invention, the blade is an arcuate blade, the widest width of the blade is D1, and the narrowest width is D2.

[0008] In a preferred embodiment of the present invention, the rotor shaft is disposed in the cylinder body, an eccentricity D3 is provided between the axis of the rotor shaft and the axis of the inner ring of the cylinder body, D1 of the blade is greater than or equal to 4 times D3, and D2 is greater than or equal to 3 times D3.

[0009] In order to solve the above technical problems, another technical solution adopted by the present invention is: to provide a prime mover, including any of the above-mentioned rotor assemblies with unidirectional offset blades, the rotor assembly is assembled in a cylinder body, the cylinder body includes an inner ring and an outer ring, and an eccentric distance D3 is provided between the center of the inner ring and the center of the outer ring.

[0010] In a preferred embodiment of the present invention, the eccentricity D3 is in the range of 8-10 mm.

[0011] In a preferred embodiment of the present invention, the cylinder block is provided with an upper cylinder head and a lower cylinder head, and bearings are respectively provided in the upper cylinder head and the lower cylinder head.

[0012] To solve the above technical problems, another technical solution adopted by the present invention is: to provide a pneumatic water pump, comprising any of the above-mentioned prime movers and a pump body, the pump body is integrally connected to the prime mover, and the impeller of the pump body is assembled on the rotor shaft.

[0013] In a preferred embodiment of the present invention, it further comprises an air inlet and an exhaust port, and the angle between the air inlet and the exhaust port is 90°-180°.

[0014] In a preferred embodiment of the present invention, it also includes a water inlet and a water outlet connected to the pump body.

[0015] The beneficial effects of the present invention are as follows: without increasing the structure, area and weight of the prime mover and without changing the original assembly dimensions, the present invention can increase the blade width, improve the end face force of the blade, and extend the service life of the blade by more than 3-4 times; at the same time, the intake and exhaust angles are adjusted and the eccentricity of the cylinder is increased, thereby greatly improving the shaft power and being able to flexibly start the drainage work at 0.1Mpa. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. Those skilled in the art can also derive other drawings based on these drawings without inventive work, among which:

[0017] Figure 1 1 is a schematic structural diagram of a preferred embodiment of a blade in a unidirectionally offset blade rotor assembly of the present invention;

[0018] Figure 2 1 is a schematic structural diagram of a preferred embodiment of a prime mover having a unidirectionally offset bladed rotor assembly according to the present invention;

[0019] Figure 3 Is a Figure 1 A pneumatic water pump is shown having a prime mover with a unidirectionally offset vane rotor assembly. DETAILED DESCRIPTION

[0020] The following is a clear and complete description of the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] See also Figure 1 and Figure 2 , embodiments of the present invention include:

[0022] A unidirectionally offset blade rotor assembly comprises: a rotor shaft 1 and a plurality of blades 2 mounted on the rotor shaft 1, wherein the blades 2 are unidirectionally offset and arranged equidistantly along the circumference of the rotor shaft 1, the radial offset angle of the blades 2 being 3-15°, and the width of the blades 2 increasing with increasing offset angle.

[0023] The preferred structure of the present invention is that four one-way biased chutes are provided on the rotor shaft 1, and each blade 2 is respectively assembled in a corresponding chute.

[0024] The blade 2 is an arcuate blade, the widest width of the blade 2 is D1, and the narrowest width is D2.

[0025] The rotor shaft 1 is arranged in the cylinder body, and an eccentric distance D3 is set between the axis of the rotor shaft 1 and the axis of the inner ring of the cylinder body. The D1 of the blade is greater than or equal to 4 times D3, and the D2 is greater than or equal to 3 times D3.

[0026] A prime mover includes a rotor assembly with unidirectionally offset blades, the rotor assembly being assembled in a cylinder body. The cylinder body includes an inner ring 3 and an outer ring 4. An eccentricity D3 is provided between the centers of the inner ring 3 and the outer ring 4. The eccentricity D3 ranges from 8 to 10 mm.

[0027] The cylinder body is provided with an upper cylinder cover and a lower cylinder cover, and bearings are respectively provided in the upper cylinder cover and the lower cylinder cover to withstand the axial torque generated when the pneumatic water pump is running, thereby ensuring the reliability and stability of the entire device.

[0028] A pneumatic water pump, such as Figure 3 As shown, it includes a prime mover and a pump body 5 , the pump body 5 is integrally connected to the prime mover, and the impeller of the pump body 5 is assembled on the rotor shaft 1 .

[0029] The pneumatic water pump further includes an air inlet 6 and an exhaust port 7, with the angle between the air inlet 6 and the exhaust port 7 being 90°-180°. The position of the air inlet and exhaust ports has been optimized to ensure tangential air intake from the center of the cylinder block, evenly balancing wear on both ends of the blades and extending their service life, making the pneumatic water pump more stable and reliable.

[0030] The pneumatic water pump further includes a water inlet 8 and a drain outlet connected to the pump body 5. Compressed air enters the cylinder body through the air inlet 8, driving the blades to rotate, driving the rotor shaft 1 to rotate, and at the same time driving the pump body impeller to operate. Under the action of centrifugal force, water enters the pump body 5 through the water inlet 8. The exhaust port 7 quickly discharges the compressed air, and the drain outlet is used to discharge the water that has entered the pump body, ultimately achieving the drainage function.

[0031] Parameter name Existing pneumatic water pump structural parameters Structural parameters of the pneumatic water pump of the present invention Cylinder outer diameter (diameter) 127mm 127mm Cylinder inner diameter (diameter) 90mm 92mm Eccentricity D3 8mm 9mm Rotor shaft diameter (diameter) 74mm 74mm Blade D1 29mm 38mm Blade D2 18mm 29mm Blade wear = D2-2×D3 2mm 11mm

[0032] Summarizing the data in the above table, it can be seen that, without changing the dimensions of the cylinder assembly structure, the pneumatic water pump utilizing the unidirectional offset blade rotor assembly of the present invention can increase the blade wear width to a size greater than or equal to 4 times the eccentricity, and the wear amount is also increased by more than 3 times, thereby avoiding and reducing the friction loss on both sides of the existing blade end, significantly improving the blade stress end surface, and extending the service life by more than 3-4 times.

[0033] At the same time, the shaft power is greatly improved by adjusting the intake and exhaust angles and increasing the eccentricity of the cylinder. The drainage work can be flexibly started at 0.1Mpa, thereby improving work efficiency.

[0034] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A unidirectional offset blade rotor assembly, characterized in that: include: A rotor shaft and a plurality of blades mounted on the rotor shaft, wherein the blades are equidistantly and unidirectionally offset along the circumference of the rotor shaft, the radial offset angle of the blades is 3-15 degrees, and the width of the blades increases with the increase of the offset angle; the blades are arcuate blades, the widest width of the blades is D1, and the narrowest width is D2; the rotor shaft is disposed in a cylinder body, an eccentricity D3 is provided between the axis of the rotor shaft and the axis of the inner ring of the cylinder body, D1 of the blades is greater than or equal to 4 times D3, and D2 is greater than or equal to 3 times D3; the eccentricity D3 ranges from 8 to 10 mm.

2. The unidirectionally offset bladed rotor assembly according to claim 1, wherein: There are four one-way offset slots on the rotor shaft, and each blade is assembled in the corresponding slot.

3. A prime mover, characterized in that: It comprises the one-way offset blade rotor assembly described in any one of claims 1-2, wherein the rotor assembly is assembled in a cylinder body, wherein the cylinder body comprises an inner ring and an outer ring, and an eccentric distance D3 is provided between the center of the inner ring and the center of the outer ring.

4. The prime mover according to claim 3, characterized in that: An upper cylinder cover and a lower cylinder cover are provided on the cylinder body, and bearings are respectively provided in the upper cylinder cover and the lower cylinder cover.

5. A pneumatic water pump, characterized in that: The invention comprises the prime mover and pump body as described in any one of claims 3-4, wherein the pump body is integrally connected to the prime mover, and the impeller of the pump body is assembled on the rotor shaft.

6. The pneumatic water pump according to claim 5, characterized in that: It also includes an air inlet and an exhaust port, and the angle between the air inlet and the exhaust port is 90°-180°.

7. The pneumatic water pump according to claim 6, characterized in that: It also includes a water inlet and a drain outlet connected to the pump body.

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