Novel double-impeller structure of tubing pump

Abstract

The utility model provides a novel double-impeller structure of a tubing pump, and belongs to the technical field of impellers. The problem that fluid transmission between double impellers of an existing booster pump is not smooth is solved. The double-impeller structure of the novel tubular pump sequentially comprises a water inlet end cover, a first impeller, a flow guide impeller disc and a second impeller from front to back, and the outer side of the double-impeller structure is sleeved with a flow guide shell; the first impeller and the second impeller are the same in structure and each comprise an impeller cover and an impeller disc, a plurality of spiral positioning grooves are formed in the back side of each impeller cover in the circumferential direction, a plurality of spiral impeller blades are formed on each impeller disc in the circumferential direction, and positioning protruding strips matched with the positioning grooves are formed on the impeller blades. A plurality of guide vanes are formed on the side edge of the guide vane disc, extend from the front side to the back side and are tightened inwards on the back side in the spiral line direction, and a guide channel is formed between every two adjacent guide vanes. The utility model has the advantages that the self-suction capacity is improved, the fluency of fluid transfer is ensured, and the stability and the uniformity of the pump during operation are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of impellers, and particularly relates to a new double-impeller structure of a tube pump. Background Art

[0002] A booster pump is a mechanical device based on physical principles that uses devices such as impellers or plungers to rotate or compress fluids to increase fluid pressure. It is widely used in water supply systems, industrial processes, petrochemicals and other industrial production fields. Booster pumps under existing technologies usually have two forms: single impeller and double impeller. The problem with a single impeller is that the self-priming ability of the pump is insufficient. Although the double impeller improves the self-priming ability of the pump, the transfer of fluid between the two impellers is not smooth, which easily forms turbulence.

[0003] According to the patent No. 201220409716.3, an integrated double-impeller booster pump is disclosed, which balances the axial fluid force by integrating two impellers and arranging them back to back. However, in actual production and manufacturing, the structure is difficult to manufacture and requires precise dynamic balancing to avoid vibration and noise. The production cost is high and the universality is poor. Utility Model Content

[0004] The utility model aims to solve the above problems in the prior art and provides a new double-impeller structure of a tube pump.

[0005] The purpose of the utility model can be achieved by the following technical solutions: a new type of tubular pump double impeller structure, which includes a water inlet end cover, a first impeller, a guide blade disk and a second impeller from front to back;

[0006] The first impeller and the second impeller have the same structure, and are both composed of an impeller cover and an impeller disc. An impeller water inlet hole is provided at the center of the impeller cover, and a plurality of positioning grooves are provided on the back side thereof around the impeller water inlet hole. A motor shaft hole is provided at the center of the impeller disc, and a plurality of impeller blades are provided on the side opposite to the impeller cover around the motor shaft hole. Positioning convex strips are formed on the impeller blades along their direction, and the impeller blades, the positioning convex strips and the positioning grooves all spread outwards along the spiral line direction, and the positioning convex strips and the positioning grooves are installed in cooperation with each other;

[0007] An end cover water inlet hole is provided at the center of the water inlet end cover, and the impeller water inlet hole of the first impeller extends into the end cover water inlet hole to match it; a mounting hole is provided at the center of the guide blade disc, and is sleeved on the tail portion formed by extending backward from the motor shaft hole at the rear side of the first impeller through the mounting hole, a mounting groove matching the first impeller is provided outwardly around the mounting hole on the front side of the guide blade disc, and a plurality of guide blades are arranged around the mounting groove on the side, the guide blades extend from the front side to the back side, and are tightened inwardly along the spiral line direction on the back side of the guide blade disc, and a guide channel is formed between adjacent guide blades.

[0008] In the above-mentioned double-impeller structure of a novel tube pump, a positioning block is formed on the positioning convex strip, and a positioning hole corresponding to the positioning block is opened in the positioning groove.

[0009] In the above-mentioned double-impeller structure of a novel tubular pump, a plurality of structural ribs are formed circumferentially on the end surface of the water inlet end cover on the side facing away from the first impeller.

[0010] In the above-mentioned double impeller structure of a novel tubular pump, the guide vane is provided with a material reduction groove along its direction on the back side.

[0011] In the double impeller structure of the novel tubular pump, the water inlet cover, the first impeller, the guide blade disc and the second impeller are covered with a guide housing on the outside, and a plurality of guide outlet holes are opened in the guide housing in the circumferential direction on the rear side of the second impeller.

[0012] Compared with the prior art, the double impeller structure of a new tubular pump provided by the utility model sets a guide blade between the double impellers, so that the fluid thrown out from the side of the first impeller is re-collected through the guidance of the guide blades and the guide channel, and then flows into the second impeller from the impeller water inlet hole of the second impeller for secondary rotation and pressurization. The utility model can not only improve the self-priming ability of the pump, but also ensure the smoothness of fluid conduction between the double impellers, reduce fluid impact, and improve the stability and uniformity of the pump body during operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the double impeller structure of the novel tubular pump;

[0014] Figure 2 It is an exploded view of the internal structure of the double impeller structure of the new tubular pump;

[0015] Figure 3 It is a cross-sectional view of the double impeller structure of the novel tubular pump;

[0016] Figure 4 It is a schematic diagram of the back structure of the guide blade disk in the double impeller structure of the new tubular pump;

[0017] Figure 5 It is a structural schematic diagram of the first impeller and the second impeller in the double impeller structure of the novel tubular pump.

[0018] In the above figure, 100, water inlet end cover; 110, water inlet hole of end cover; 120, structural rib; 201, first impeller; 202, second impeller; 210, impeller cover; 211, impeller water inlet hole; 212, positioning groove; 213, positioning hole; 220, impeller disc; 221, motor shaft hole; 222, impeller blade; 223, positioning convex strip; 224, positioning block;

[0019] 300, guide blade disc; 310, mounting hole; 320, mounting groove; 330, guide blade; 331, guide channel; 332, material reduction groove; 400, guide housing; 410, guide water outlet hole. DETAILED DESCRIPTION

[0020] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0021] like Figures 1 to 5 As shown, the water inlet end of the double impeller structure of the new tubular pump is defined as the front end, and the water outlet end is the rear end. The utility model is provided with a water inlet end cover 100, a first impeller 201, a guide blade disk 300 and a second impeller 202 from front to back, wherein the first impeller 201 has the same structure as the second impeller 202. The fluid flows into the first impeller 201 from the water inlet end face, is guided and collected by the guide blade disk 300 after being thrown out, flows into the second impeller 202 for secondary rotation and pressurization, and then is thrown out.

[0022] The water inlet cover 100 , the double impellers and the guide blade disk 300 are collectively sleeved with a guide housing 400 , and the guide housing 400 is circumferentially provided with a plurality of guide outlet holes 410 at the rear side of the second impeller 202 , and the ejected fluid flows out from the guide outlet holes 410 .

[0023] like Figure 5 As shown, the first impeller 201 and the second impeller 202 are both composed of an impeller cover 210 and an impeller disc 220. An impeller water inlet hole 211 is provided at the center of the impeller cover 210. The edge of the impeller water inlet hole 211 protrudes forward for a distance on the front side for easy installation and fixation. A plurality of positioning grooves 212 are provided on the back side around the impeller water inlet hole 211. The positioning grooves 212 spread outward along the spiral line direction, and a positioning hole 213 is provided inward at the bottom of each positioning groove 212. All positioning holes 213 are located on the concentric circle of the impeller water inlet hole 211.

[0024] The center of the impeller disc 220 is provided with a motor shaft hole 221, and the edge of the motor shaft hole 221 protrudes backwards for a distance at the rear side to facilitate sleeve installation on the motor shaft. The front side thereof opposite to the impeller cover 210 is provided with a plurality of impeller blades 222 circumferentially around the motor shaft hole 221, and the top of the impeller blade 222 is formed with a positioning convex strip 223 along its direction, and a positioning block 224 is formed on the positioning convex strip 223. The impeller blade 222 and the positioning convex strip 223 thereon also spread outward along the spiral line direction, and are consistent with the spiral direction and angle of the positioning groove 212, and the positioning convex strip 223 can be embedded in the positioning groove 212 and installed in coordination therewith, and the positioning block 224 thereon also corresponds to the position of the positioning hole 213, so that the impeller cover 210 and the impeller disc 220 are installed in coordination with each other and are not easy to loosen.

[0025] During operation, the impeller disc 220 drives the impeller cover 210 to rotate together with the rotation of the motor shaft, and the fluid is sucked into the space between the spiral impeller blades 222 through the impeller water inlet hole 211, and is thrown out of the impeller from the side of the impeller after rotation and pressure increase.

[0026] like Figures 2 to 3 As shown, the center of the water inlet end cover 100 is provided with an end cover water inlet hole 110, the edge of the end cover water inlet hole 110 protrudes forward at the front side, and the extension portion of the impeller water inlet hole 211 of the first impeller 201 extends from the rear side into the end cover water inlet hole 110 to cooperate with it, so that the fluid flows directly into the impeller water inlet hole 211 of the first impeller 201 through the end cover water inlet hole 110. The water inlet end cover 100 has a plurality of structural ribs 120 formed circumferentially on the front side end surface facing away from the first impeller 201, and the structural ribs 120 play a role in enhancing the structural strength of the water inlet end cover 100 and resisting the impact of external fluid.

[0027] like Figure 2 and Figure 4 As shown, a mounting hole 310 is provided at the center of the guide blade disc 300. The guide blade disc 300 is sleeved and installed on the tail formed by the motor shaft hole 221 extending backward at the rear side of the first impeller 201 through the mounting hole 310. A circle of mounting grooves 320 are provided circumferentially outward around the mounting hole 310 on the front side of the guide blade disc 300. The first impeller 201 is mounted in the mounting groove 320. A plurality of guide blades 330 are circumferentially provided around the mounting groove 320 on the side of the guide blade disc 300. The guide blades 330 are slightly convex on the front side to intercept the fluid thrown out from the side of the first impeller 201, and extend from the front side to the back side. They are tightened inward along the spiral line direction on the back side, so that a guide channel 331 is formed between adjacent guide blades 330. The fluid is redirected and collected through the guide channel 331, and then flows into the second impeller 202 from the impeller water inlet hole 211 of the second impeller 202 for secondary rotation and supercharging.

[0028] It is further explained that the spiral direction of the guide vane 330 on the back side is consistent with the direction of the impeller blade 222 on the double impeller, and the guide vane 330 is provided with a material reduction groove 332 along its direction on the back side. The material reduction groove 332 can reduce material loss and reduce the weight of the guide vane 300 without affecting the guide effect of the guide vane 300.

[0029] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0030] Although various terms are used more frequently in this article, the possibility of using other terms is not excluded. These terms are used only to more conveniently describe and explain the essence of the utility model; interpreting them as any additional restrictions is contrary to the spirit of the utility model.

Claims

1. A novel double-impeller structure of a tubular pump, comprising, from front to back, a water inlet end cover (100), a first impeller (201), a guide blade disk (300), and a second impeller (202); It is characterized in that The first impeller (201) and the second impeller (202) have the same structure, and are both composed of an impeller cover (210) and an impeller disc (220); an impeller water inlet hole (211) is provided at the center of the impeller cover (210); a plurality of positioning grooves (212) are provided on the back side of the impeller cover in a circumferential direction around the impeller water inlet hole (211); a motor shaft hole (221) is provided at the center of the impeller disc (220); a plurality of impeller blades (222) are provided on the side opposite to the impeller cover (210) in a circumferential direction around the motor shaft hole (221); positioning convex strips (223) are formed on the impeller blades (222) along their direction; the impeller blades (222), the positioning convex strips (223) and the positioning grooves (212) all spread outwards along the spiral line direction, and the positioning convex strips (223) and the positioning grooves (212) are installed in coordination with each other; The water inlet end cover (100) is provided with an end cover water inlet hole (110) at the center, and the impeller water inlet hole (211) of the first impeller (201) extends into the end cover water inlet hole (110) to match it; the guide blade disc (300) is provided with a mounting hole (310) at the center, and is sleeved on a tail portion formed by extending backward from the motor shaft hole (221) at the rear side of the first impeller (201) through the mounting hole (310); a mounting groove (320) matching the first impeller (201) is provided outwardly in the circumferential direction around the mounting hole (310) at the front side of the guide blade disc (300), and a plurality of guide blades (330) are provided in the circumferential direction around the mounting groove (320) at the side; the guide blades (330) extend from the front side to the back side, and are tightened inwardly along the spiral line direction at the back side of the guide blade disc (300); and a guide channel (331) is formed between adjacent guide blades (330).

2. A new type of double impeller structure of a tube pump according to claim 1, characterized in that: A positioning block (224) is formed on the positioning convex strip (223), and a positioning hole (213) corresponding to the positioning block (224) is formed in the positioning groove (212).

3. A new type of double impeller structure of a tube pump according to claim 1, characterized in that: The water inlet end cover (100) is circumferentially formed with a plurality of structural ribs (120) on an end surface on one side facing away from the first impeller (201).

4. A new type of double impeller structure of a tube pump according to claim 1, characterized in that: The guide vane (330) is provided with a material reduction groove (332) on the back side along the direction thereof.

5. A new type of double impeller structure of a tube pump according to claim 1, characterized in that: A flow guide housing (400) is sleeved on the outer sides of the water inlet end cover (100), the first impeller (201), the flow guide blade disk (300) and the second impeller (202); a plurality of flow guide outlet holes (410) are circumferentially formed on the flow guide housing (400) at the rear side of the second impeller (202).

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