CN218816952U - Vane pump - Google Patents

Abstract

The utility model provides an impeller pump, which comprises a pump body, a pump cavity arranged in the pump body, two rotating shafts arranged in the pump body in parallel and a motor for driving the rotating shafts to rotate, wherein impellers are respectively arranged on the rotating shafts, the impellers are hermetically arranged in the pump cavity, and the end surfaces of the two sides of the impellers are arranged close to the inner wall of the pump cavity and leave a movement gap; at least one side end face of the impeller is provided with a core hole, and the core hole is used for reducing the area of a contact surface when the end face of the impeller is attached to the inner wall of the pump cavity. The utility model discloses can effectively reduce the sliding friction power between impeller both sides terminal surface and the pump chamber inner wall, the impeller pump is easy start, the operation is stable and operating efficiency is higher when using.

Description

Vane pump

Technical Field

The utility model relates to a technical field is made to the pump, particularly, relates to an impeller pump.

Background

The impeller pump is also called as rotor pump, colloid pump, universal delivery pump, etc. because its impeller is shaped like cam, also called as cam pump, the impeller pump belongs to positive displacement pump, generally is a double rotor. The impeller pump achieves the purpose of conveying fluid materials by means of periodic conversion of a plurality of fixed volume conveying units in a working chamber. Generally, an impeller pump includes a pump body, a pump cavity disposed in the pump body, two rotating shafts disposed in parallel in the pump body, and a motor disposed on the rotating shafts and driving the rotating shafts to rotate; impellers are respectively and fixedly arranged on the two rotating shafts, and the two impellers are sealed and positioned in the pump cavity; when the pump works, the lower rotating shaft is driven by the motor to drive the two impellers to synchronously rotate in opposite directions, so that the volume of the pump is changed, and higher vacuum degree and discharge pressure are formed; the pump has a low pressure region at the inlet and a high pressure region at the outlet. In order to ensure that the impeller can normally rotate in the pump cavity, a movement gap is arranged between the end faces of the two sides of the impeller and the inner wall of the pump cavity, and because materials need to bear higher pressure at the output end of the pump when the impeller pump works, the materials can easily flow back to a low-pressure area from the movement gap between the end faces of the two sides of the impeller and the inner wall of the pump cavity under high pressure; when the movement clearance between the end surfaces at the two sides of the impeller and the inner wall of the pump cavity is too small, the end surfaces at the two sides of the impeller are very easy to slightly move along the axial direction of the rotating shaft due to the limitation of part processing precision and installation precision when the impeller rotates, the end surfaces at the two sides of the impeller move to cause the end surfaces at the two sides of the impeller and the inner wall of the pump cavity to generate friction, and when the friction contact surface between the end surfaces at the two sides of the impeller and the inner wall of the pump cavity is too large, the abrasion between the end surfaces at the two sides of the impeller and the inner wall of the pump cavity is accelerated, the operation of the pump is very easy to be unstable, and even the pump cannot be started; when the movement clearance between the end faces at the two sides of the impeller and the inner wall of the pump cavity is too large, the leakage rate of fluid materials flowing back from the high-pressure area to the low-pressure area is increased, the suction force of the pump is reduced, and the operation efficiency of the pump is reduced. In order to make the movement clearance between the end surfaces at two sides of the impeller and the inner wall of the pump cavity as small as possible and even approach to zero movement clearance, the end surfaces at two sides of the impeller are usually arranged close to the inner wall of the pump cavity, otherwise, the end surfaces at two sides of the impeller are arranged far away from the inner wall of the pump cavity; in addition, the pump body, the rotor and the impeller are usually made of stainless steel for sanitation, and when the two side end surfaces of the impeller made of stainless steel and the inner wall of the pump cavity are in contact, the sliding friction force between the two side end surfaces of the impeller and the inner wall of the pump cavity is larger, so that the impeller pump is more difficult to start.

Therefore, how to reduce the sliding friction force between the end surfaces at the two sides of the impeller and the inner wall of the pump cavity, solve the problem that the impeller pump cannot be started normally, and improve the operating efficiency of the impeller pump; meanwhile, the impeller pump is ensured to adjust the sealing strength between the end faces at two sides of the impeller and the inner wall of the pump cavity according to different viscosities of conveyed fluid materials, and therefore technical problems to be solved by technical personnel in the field are needed.

SUMMERY OF THE UTILITY MODEL

The utility model provides an overcome at least one defect among the prior art, provide one kind and can effectively reduce the impeller pump of the sliding friction power between impeller both sides terminal surface and the pump chamber inner wall to solve the impeller pump because of the too big unable normal start's of frictional resistance problem between impeller both sides terminal surface and the pump chamber inner wall, ensure the operating stability of impeller pump and improve the operating efficiency of impeller pump.

In order to solve the technical problem, the utility model provides an impeller pump, which comprises a pump body, a pump cavity arranged in the pump body, two rotating shafts arranged in the pump body in parallel and a motor for driving the rotating shafts to rotate, wherein the rotating shafts are respectively provided with an impeller, the impeller is hermetically arranged in the pump cavity, and the end surfaces of the two sides of the impeller are arranged close to the inner wall of the pump cavity and leave a movement gap; at least one side end face of the impeller is provided with a core hole, and the core hole is used for reducing the area of a contact surface when the end face of the impeller is attached to the inner wall of the pump cavity.

Compared with the prior art, the utility model, useful part lies in: the utility model discloses through set up the core hole on the terminal surface of impeller, utilize the core hole to reduce the area of contact of impeller terminal surface and pump chamber inner wall, and then can reduce the sliding friction force between impeller terminal surface and the pump chamber inner wall, thereby effectively solve the problem that the impeller pump can't normally start because of the too big frictional resistance between impeller terminal surface and the pump chamber inner wall; meanwhile, the reduction of the sliding friction force between the end face of the impeller and the inner wall of the pump cavity is beneficial to the stable operation of the impeller pump and the improvement of the operation efficiency of the impeller pump; in addition, the arrangement of the core hole is also beneficial to the light weight of the impeller, and the shaft power of the impeller pump can be reduced through the light weight of the impeller, so that the aims of improving the operating efficiency of the impeller pump and realizing energy conservation and consumption reduction are fulfilled.

Specifically, the core hole is a blind hole formed by recessing an end face of the impeller toward the inside of the impeller. The blind holes can be arranged on the end surface of one side of the impeller and can also be arranged on the end surfaces of two sides of the impeller; compared with the blind holes formed in the end face of one side of the impeller, the blind holes formed in the end faces of the two sides of the impeller have better rotating balance, and the contact area between the end face of the impeller and the inner wall of the pump cavity can be reduced to the greatest extent, so that the sliding friction force between the end face of the impeller and the inner wall of the pump cavity can be reduced better; in addition, because the blind hole structure does not penetrate through the impeller body, when core holes are densely formed in the end face of the impeller, the impeller body can still maintain good enough structural strength.

Specifically, the core hole is a through hole having both ends penetrating both side end surfaces of the impeller, respectively. The core hole of through-hole structure can reduce the area of contact of impeller both sides terminal surface and pump chamber inner wall simultaneously, compares in the core hole of blind hole structure, sets up under the condition of the same quantity core hole, and the through-hole structure compares in the blind hole structure can double reduce the sliding friction power between impeller terminal surface and the pump chamber inner wall, and more is favorable to the lightweight of impeller to be favorable to improving the operating efficiency of pump.

As an improvement, an elastic core rod is arranged in the core hole, and the end part of the core rod protrudes out of the end face of the impeller and is close to the inner wall of the pump cavity. After the structure is applied, the elastic core rod replaces an impeller made of stainless steel, the end part of the core rod replaces the end face of the impeller to be in frictional contact with the inner wall of the pump cavity made of stainless steel, the core rod can retract under pressure to reduce frictional resistance, and the core rod and the pump cavity are made of different materials and can play a role in lubrication, so that the structural jamming caused when the end face of the impeller made of the same material is in frictional contact with the inner wall of the pump cavity can be effectively avoided; meanwhile, different sealing strengths between the end face of the impeller and the inner wall of the pump cavity can be realized by arranging the core rods with different lengths in the core hole, so that the impeller pump can meet the use requirements of conveying fluid materials with different viscosities; the elastic core rod is arranged in the core hole, so that the sealing function between the end face of the impeller and the inner wall of the pump cavity can be realized, and the aim of reducing the sliding friction between the end face of the impeller and the inner wall of the pump cavity as much as possible is fulfilled.

Specifically, the body of the core rod is made of rubber or polytetrafluoroethylene material. The rubber and the polytetrafluoroethylene have better corrosion resistance and wear resistance, and are ideal materials for manufacturing the core rod.

As the improvement, one side of the pump body close to the pump cavity is detachably connected with a pump cover, and the inner side wall of the pump cover is communicated with the pump cavity and forms one part of the inner wall of the pump cavity. The pump cover ensures that the pump cavity can be opened, so that the impeller is installed in the pump cavity, the core rod is arranged in the core hole, and the worn core rod is replaced.

As an improvement, a sealing ring is arranged between the pump body and the pump cover. The sealing ring is arranged, so that fluid materials conveyed in the pump cavity can be prevented from leaking out of the pump body along a gap between the pump body and the pump cover.

Drawings

Fig. 1 is a schematic overall structure diagram of a first embodiment of the present invention;

FIG. 2 is an enlarged view taken at A in FIG. 1;

FIG. 3 is a perspective view of a core rod inserted into a core hole of an impeller according to an embodiment of the present invention;

FIG. 4 is an exploded view of FIG. 3;

fig. 5 is a schematic overall structure diagram of a second embodiment of the present invention;

FIG. 6 is an enlarged view at B in FIG. 5;

fig. 7 is a perspective view of a second embodiment of the present invention, in which a core rod is inserted into a core hole of an impeller;

fig. 8 is an exploded view of fig. 7.

Description of reference numerals:

1. a pump body; 2. a pump chamber; 3. a rotating shaft; 4. an impeller; 5. a core hole; 6. a core rod; 7. a pump cover; 8. and (5) sealing rings.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, embodiments accompanied with figures are described in detail below.

The first embodiment is as follows:

as shown in fig. 1 to 4, in this embodiment, the impeller 4 pump includes a pump body 1, a pump cavity 2 disposed in the pump body 1, two rotating shafts 3 disposed in parallel in the pump body 1, and a motor for driving the rotating shafts 3 to rotate, the rotating shafts 3 are respectively provided with an impeller 4, the impeller 4 is hermetically mounted in the pump cavity 2, and two side end surfaces of the impeller 4 are disposed close to an inner wall of the pump cavity 2 and leave a movement gap; at least one side end face of the impeller 4 is provided with a core hole 5, and the core hole 5 is used for reducing the area of a contact surface when the end face of the impeller 4 is attached to the inner wall of the pump cavity 2.

Compared with the prior art, the utility model, useful part lies in: the utility model discloses a set up core hole 5 on the terminal surface of impeller 4, utilize core hole 5 to reduce the area of contact of 4 terminal surfaces of impeller and 2 inner walls of pump chamber, and then can reduce the sliding friction force between 4 terminal surfaces of impeller and 2 inner walls of pump chamber, thus solve the problem that the pump can't be started normally because of the too big frictional resistance between 4 terminal surfaces of impeller and 2 inner walls of pump chamber effectively; meanwhile, the reduction of the sliding friction force between the end face of the impeller 4 and the inner wall of the pump cavity 2 is beneficial to the stable operation of the impeller 4 and the improvement of the operation efficiency of the impeller 4; in addition, the arrangement of the core hole 5 is also beneficial to the light weight of the impeller 4, and the shaft power of the impeller 4 pump can be reduced through the light weight of the impeller 4, so that the aims of improving the operating efficiency of the impeller 4 pump and realizing energy conservation and consumption reduction are fulfilled.

As shown in fig. 3 and 4, the core hole 5 is a blind hole formed by recessing the end surface of the impeller 4 toward the inside of the impeller 4. The blind holes can be arranged on the end surface of one side of the impeller 4, and can also be arranged on the end surfaces of two sides of the impeller 4; compared with the blind holes formed in the end surface of one side of the impeller 4, the blind holes formed in the end surfaces of the two sides of the impeller 4 have better rotating balance, and the contact area between the end surface of the impeller 4 and the inner wall of the pump cavity 2 can be reduced to the greatest extent, so that the sliding friction force between the end surface of the impeller 4 and the inner wall of the pump cavity 2 can be reduced better; in addition, because the blind hole structure does not penetrate through the impeller 4 body, when the core holes 5 are densely formed on the end surface of the impeller 4, the impeller 4 body can still keep good enough structural strength.

As shown in fig. 2, 3 and 4, a core rod 6 having elasticity is provided in the core hole 5, and an end portion of the core rod 6 protrudes from an end surface of the impeller 4 and is close to an inner wall of the pump chamber 2. After the structure is applied, the elastic core rod 6 replaces the impeller 4 made of stainless steel, the end face of the impeller 4 is replaced by the end part of the core rod 6 to be in frictional contact with the inner wall of the pump cavity 2 made of stainless steel, the core rod 6 can not only reduce the frictional resistance through compression retraction, but also play a role in lubrication because the core rod 6 and the pump cavity 2 are made of different materials, and the structural jamming caused when the end face of the impeller 4 made of the same material is in frictional contact with the inner wall of the pump cavity 2 can be effectively avoided; meanwhile, different sealing strengths between the end face of the impeller 4 and the inner wall of the pump cavity 2 can be realized by arranging the core rods 6 with different lengths in the core hole 5, so that the pump can meet the use requirements of conveying fluid materials with different viscosities; by arranging the elastic core rod 6 in the core hole 5, not only the sealing function between the end face of the impeller 4 and the inner wall of the pump cavity 2 can be realized, but also the aim of reducing the sliding friction force between the two as much as possible is fulfilled. From the formula f = μ N (μ is a kinetic friction factor, which relates to the material and roughness of the contact surfaces, and N is a positive pressure, which relates to the elastic force between the contact surfaces) for calculating the sliding friction force: the magnitude of the sliding friction force f is proportional to the positive pressure N. In the structure, compared with the prior art that the end surface of the impeller 4 made of stainless steel is close to the inner wall of the pump cavity 2 made of stainless steel, the end surface of the elastic core rod 6 is close to the inner wall of the pump cavity 2 made of stainless steel, and the core rod 6 has elasticity, the positive pressure applied to the inner wall of the pump cavity 2 when the end of the core rod 6 is close to the inner wall of the pump cavity 2 is smaller, namely the sliding friction force between the end of the core rod 6 and the inner wall of the pump cavity 2 is smaller, and the impeller 4 can more easily rotate in the pump cavity 2, so that the operating efficiency of the pump can be improved; the test proves that: when the structure is used for conveying low-viscosity fluid materials, the operation efficiency of the pump can be improved by 30.8%.

Specifically, the body of the core rod 6 is made of rubber or polytetrafluoroethylene material. The rubber and the polytetrafluoroethylene have better corrosion resistance and wear resistance, and are ideal materials for manufacturing the core rod 6. The core rod 6 may also be made of other materials that are elastic, wear-resistant and corrosion-resistant.

As shown in fig. 1 and 2, a pump cover 7 is detachably connected to a side of the pump body 1 close to the pump cavity 2, and an inner side wall of the pump cover 7 is communicated with the pump cavity 2 and forms a part of an inner wall of the pump cavity 2. The provision of the pump cover 7 ensures that the pump chamber 2 can be opened in order to facilitate the installation of the impeller 4 in the pump chamber 2 and the arrangement of the core rod 6 in the core hole 5 and the replacement of the worn core rod 6. The detachable connection structure of the pump body 1 and the pump cover 7 can adopt a clamping connection mode and also can adopt a bolt and a threaded hole matched with bolt connection mode, and generally adopts a bolt connection structure in order to ensure that the pump body 1 and the pump cover 7 have better connection strength.

As shown in fig. 1 and 2, a seal ring 8 is provided between the pump body 1 and the pump cover 7. The sealing ring 8 is arranged to prevent the fluid material conveyed in the pump cavity 2 from leaking out of the pump body 1 along the gap between the pump body 1 and the pump cover 7.

The second embodiment:

the present embodiment is different from the first embodiment in the specific structure of the core hole 5.

As shown in fig. 5 to 8, the core hole 5 is a through hole having both ends penetrating both side end surfaces of the impeller 4. The core hole 5 of through-hole structure can reduce the area of contact of 4 both sides terminal surfaces of impeller and 2 inner walls of pump chamber simultaneously, compares in the core hole 5 of blind hole structure, sets up under the condition of the same quantity core hole 5, and the through-hole structure can double reduce the slip frictional force between 4 terminal surfaces of impeller and 2 inner walls of pump chamber in comparison in the blind hole structure, and more is favorable to the lightweight of impeller 4 to be favorable to improving the operating efficiency of pump.

Although the present disclosure has been described above, the scope of the present disclosure is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present disclosure, and such changes and modifications will fall within the scope of the present invention.

Claims (7)

1. An impeller pump comprises a pump body (1), a pump cavity (2) arranged in the pump body (1), two rotating shafts (3) arranged in the pump body (1) in parallel and a motor for driving the rotating shafts (3) to rotate, wherein impellers (4) are respectively arranged on the rotating shafts (3), the impellers (4) are hermetically arranged in the pump cavity (2), and the end surfaces of the two sides of each impeller (4) are arranged close to the inner wall of the pump cavity (2) and leave a movement gap; the method is characterized in that: the pump is characterized in that a core hole (5) is formed in at least one side end face of the impeller (4), and the core hole (5) is used for reducing the area of a contact surface when the end face of the impeller (4) is attached to the inner wall of the pump cavity (2).

2. A vane pump according to claim 1 wherein: the core hole (5) is a blind hole formed by sinking the end surface of the impeller (4) towards the inside of the impeller (4).

3. A vane pump according to claim 1 wherein: the core hole (5) is a through hole with two ends respectively penetrating through the end faces of the two sides of the impeller (4).

4. A vane pump according to claim 2 or claim 3 wherein: an elastic core rod (6) is arranged in the core hole (5), and the end part of the core rod (6) protrudes out of the end face of the impeller (4) and is close to the inner wall of the pump cavity (2).

5. A vane pump according to claim 4, wherein: the body of the core rod (6) is made of rubber or polytetrafluoroethylene materials.

6. A vane pump according to claim 2 wherein: one side of the pump body (1) close to the pump cavity (2) is detachably connected with a pump cover (7), and the inner side wall of the pump cover (7) is communicated with the pump cavity (2) to form a part of the inner wall of the pump cavity (2).

7. A vane pump according to claim 6 wherein: and a sealing ring (8) is arranged between the pump body (1) and the pump cover (7).

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