CN215170724U

CN215170724U - Single-screw pump structure of non-traditional universal joint

Info

Publication number: CN215170724U
Application number: CN202122719836.5U
Authority: CN
Inventors: 隆权; 陈利; 邹纯超; 肖蓠; 房斌; 冯成程; 周超
Original assignee: Sichuan Enterasys Mechanical And Electrical Equipment Co ltd
Current assignee: Sichuan Enterasys Mechanical And Electrical Equipment Co ltd
Priority date: 2021-11-09
Filing date: 2021-11-09
Publication date: 2021-12-14
Anticipated expiration: 2031-11-09

Abstract

The utility model relates to a single screw pump structure of a non-traditional universal joint, which comprises a discharging body, a stator, a feeding cavity, a bearing seat and a motor which are arranged from left to right in sequence, and also comprises a screw, a connecting shaft, a transmission shaft and a motor which are connected in sequence; the discharging body is provided with a heating structure, and the feeding cavity is internally provided with a flow guide structure, a reinforced sealing structure and a pressure reduction structure. The utility model discloses the beneficial effect who reaches is: the viscous medium has good conveying effect, good flow guiding effect and good sealing effect.

Description

Single-screw pump structure of non-traditional universal joint

Technical Field

The utility model relates to the technical field of pumps, especially a single-screw pump structure of non-traditional universal joint.

Background

The single-screw pump is a rotor type displacement pump, and its main working component is formed from stator with double-screw cavity and single-head screw rotor which is internally meshed with said stator in its cavity. When the transmission shaft drives the rotor to make planetary rotation around the stator through the universal joint, the stator-rotor pairs are continuously meshed to form closed cavities, and the closed volumes are constantly axially rotated at a constant speed to reduce the pressure in the closed suction chamber, so that the working medium is continuously conveyed from the suction end to the output end, and the continuous conveying of the pump is realized.

The single-screw pump is generally used in a severe environment and is mainly used for conveying viscous media such as oil products, rubber products and the like, and the conventional single-screw pump has certain defects in conveying the viscous media; for example, from the inlet chamber into the extrusion chamber of the stator and the screw, the flow of the viscous medium is influenced to a certain extent.

In addition, since one end of the screw rod is in a free state, the noise of the entire pump is large.

Therefore, the company upgrades and improves the structure of the pump aiming at the defects, thereby not only improving the conveying effect and reducing the vibration, but also improving the sealing effect.

Disclosure of Invention

An object of the utility model is to overcome prior art's shortcoming, provide a viscous medium carry effectual, the water conservancy diversion is effectual, sealed effectual single-screw pump structure of non-traditional universal joint.

The purpose of the utility model is realized through the following technical scheme: a single-screw pump structure of a non-traditional universal joint comprises a discharging body, a stator, a feeding cavity, a bearing seat and a motor which are sequentially arranged from left to right, wherein a screw is arranged in the stator, a connecting shaft is arranged in the feeding cavity, a transmission shaft is arranged in the bearing seat, and the screw, the connecting shaft, the transmission shaft and the motor are sequentially connected in a driving way;

the stator is provided with a heating structure, and the heating structure heats the flowing medium at the stator and is used for reducing the viscosity of the flowing medium; the heating structure comprises a heating coil which is arranged on the stator and is used for simultaneously and electromagnetically heating the stator and the screw; the screw and stator are heated and transfer heat to the flowing medium.

Furthermore, the stator comprises an inner layer and an outer layer, the inner layer and the outer layer are mutually attached, the attachment surfaces of the inner layer and the outer layer are provided with spiral grooves, and heating coils are arranged at the spiral grooves.

Furthermore, the outer layer is axially split into two sections, and the two sections are buckled to coat the inner layer and the heating coil; the stator is sleeved with a hoop, and two ends of the stator are inserted into the feeding cavity and the end head of the discharging body; the feeding cavity and the discharging body are tightened by the pull rod to fix the stator.

Furthermore, the screw is a hollow shaft, and liquid with small specific heat capacity is filled in the hollow shaft.

Furthermore, a flood dragon blade is arranged on the connecting shaft to form a structure for pushing the medium in the feeding cavity leftwards; along motor to eduction body direction, the diameter of flood dragon blade reduces gradually.

Furthermore, a left barrel cavity of the feeding cavity is provided with a flow guide structure; in the water conservancy diversion structure: the cavity wall of the left cylinder cavity of the feeding cavity is arc-shaped; a baffle ring is arranged at the left end of the connecting shaft, and the left end of the connecting shaft is hinged with the screw rod through a small-diameter shaft via a universal joint A; the diameter of the universal joint A is equivalent to that of the connecting shaft. In the flow guide structure, a flowing medium flows to the arc-shaped cavity wall of the left barrel cavity of the feeding cavity after being acted by the baffle ring and then is guided into the extrusion cavity of the stator and the screw.

Furthermore, the feeding cavity and the bearing seat form a reinforced sealing structure through an annular packing body and an annular gland; in the reinforced seal structure: the section of the packing body cut along the axial direction is in a T shape, the gland is provided with a matched groove, and the gland supports against the inner ring and the outer ring of the packing body.

Further, the right barrel cavity of the feeding cavity is provided with a pressure reducing structure; the right cylinder cavity of the feeding cavity is provided with a connecting shaft, the right end of the connecting shaft is connected with a transmission shaft through a universal joint B, and the transmission shaft is arranged at the left end and the right end close to the left end and is matched with a bearing seat through a bearing. In the pressure reducing structure: the right end of the connecting shaft extends into the right barrel cavity of the feeding cavity, and the end is also provided with a flood dragon blade, the flood dragon blade forms leftward thrust to the medium, and the medium is prevented from flowing rightwards to form rightward thrust to the filler body.

The utility model has the advantages of it is following:

(1) the heating coil is arranged to heat the flowing medium, so that the viscosity of the medium is reduced, and the medium flowing is facilitated; the design of the two layers of the stator can realize electromagnetic induction heating, can preserve heat and has good strength;

(2) the arrangement of the flood dragon blades can play a role in assisting and pushing the flowing of the medium, has an obvious effect on viscous medium, can reduce the pressure in the cylinder cavity at the right part of the feeding cavity, avoids the deformation of the packing body to the right, enables the packing body to be tightly attached to the transmission shaft, and is beneficial to improving the sealing effect;

(3) the arrangement of the flow guide structure guides the medium, and reduces the interference of the universal joint A on the flow of the medium;

(4) strengthen seal structure, decompression structure's setting, all let the packing body and transmission shaft carry out good laminating contact, realized good sealed effect.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the structure at the stator;

FIG. 3 is a schematic view of the structure at the feed chamber;

FIG. 4 is a schematic structural view of the feed cavity disposed between the bearing housing;

in the figure: 1-discharge body, 2-stator, 201-inner layer, 202-outer layer, 3-feeding cavity, 4-bearing seat, 5-motor, 6-screw, 7-connecting shaft, 8-transmission shaft, 9-heating coil, 10-hoop, 11-pull rod, 12-flood dragon blade, 13-baffle ring, 14-universal joint A, 15-packing body, 16-gland and 17-universal joint B.

Detailed Description

The invention will be further described with reference to the accompanying drawings, but the scope of the invention is not limited to the following description.

As shown in fig. 1 and 2, a single-screw pump structure of a non-traditional universal joint comprises a discharger 1, a stator 2, a feeding cavity 3, a bearing seat 4 and a motor 5 which are sequentially arranged from left to right, wherein a screw 6 is arranged in the stator 2, a connecting shaft 7 is arranged in the feeding cavity 3, a transmission shaft 8 is arranged in the bearing seat 4, and the screw 6, the connecting shaft 7, the transmission shaft 8 and the motor 5 are sequentially connected in a driving manner; the rotating shaft 6 is connected with the connecting shaft 7 through a universal joint A14, and the connecting shaft 7 is connected with the transmission shaft 8 through a universal joint B17; the feeding cavity 3 and the bearing block 4 are sealed by a packing body 15 and a gland 16.

In the scheme, a heating structure is arranged at the stator 2, and the heating structure heats the flowing medium at the stator 2 and is used for reducing the viscosity of the flowing medium; the heating structure comprises a heating coil 9, the heating coil 9 is arranged on the stator 2 and is used for simultaneously and electromagnetically heating the stator 2 and the screw 6; the screw 6 and the stator 2 are heated and transfer heat to the flowing medium.

In this embodiment, as shown in fig. 2, the stator 2 includes an inner layer 201 and an outer layer 202, the inner layer 201 and the outer layer 202 are bonded to each other, a bonding surface of the inner layer 201 and the outer layer 202 is provided with a spiral groove, and a heating coil 9 is provided at the spiral groove. The outer layer 202 is split into two pieces along the axial direction, and the two pieces are buckled to cover the inner layer 201 and the heating coil 9. The inner layer 201 is a heating layer which transfers heat to a medium after being heated during electromagnetic induction; the outer layer 202 serves as a stress-bearing and thermal-insulating function, i.e., heat dissipation of the inner layer 201 is avoided, and at the same time, a reinforcing function is provided for the inner layer 201.

When the stator 2 is fixedly installed, a hoop 10 is sleeved outside the stator, and two ends of the hoop are inserted into the feeding cavity 3 and the end head of the discharging body 1; the feed cavity 3 and the discharging body 1 are tightened by the pull rod 11, and the feed cavity 3 and the discharging body 1 clamp and fix the stator 2.

In this embodiment, the screw 6 is a hollow shaft, and a liquid having a small specific heat capacity is contained therein. The hollow design reduces the weight of the screw 6, so that the kinetic energy is small when the screw rotates, and the electric energy used for driving is reduced; on the other hand, if a solid design is adopted, the heat inside the screw 6 is not easy to transfer, and the mode of filling the screw with the liquid with the small specific heat capacity enables the heat generated by the electromagnetic induction of the screw 6 to be easily transferred to the hot melt liquid with the small specific heat capacity, and the liquid with the small specific heat capacity transfers the heat to the flowing medium after passing through the screw 6, so that the flowing medium is heated.

Optionally, as shown in fig. 3 and 4, the single-screw pump structure of a non-conventional universal joint further includes a dragon blade 12, where the dragon blade 12 is disposed along a cylindrical surface of the connecting shaft 7 to form a structure that pushes media in the feeding cavity 3 leftward; the diameter of the flood dragon blade 12 gradually decreases along the direction from the motor 5 to the discharger 1.

The common single-screw long pump mainly depends on the pressure difference formed after extrusion to make the material enter an extrusion cavity; however, since a viscous medium is frequently extracted, the fluidity of the medium is not particularly desirable; the added flood dragon vanes 12 play a role in assisting in pushing the medium to flow. After the medium enters the interior from the inlet at the upper side of the feeding cavity 3, a part of the medium flows to the left directly, and the other part of the medium flows to the left under the action of the flood dragon vanes 12.

Alternatively, in a non-conventional universal joint single screw pump structure, as shown in fig. 2, the left barrel cavity of the feeding cavity 3 has a flow guiding structure; in the water conservancy diversion structure: the cavity wall of the left cylinder cavity of the feeding cavity 3 is arc-shaped; a baffle ring 13 is arranged at the left end of the connecting shaft 7, and the left end of the connecting shaft 7 is hinged with the screw 6 through a small-diameter shaft via a universal joint A14; the diameter of the universal joint a14 corresponds to the diameter of the connecting shaft 7. In the flow guide structure, a medium flows to the arc-shaped cavity wall of the left barrel cavity of the feeding cavity 3 after being acted by the baffle ring 13 and then is guided into the extrusion cavity of the stator 2 and the screw 6.

In a common single-screw long pump, the wall of the left barrel cavity of the feeding cavity 2 is generally cylindrical, and meanwhile, the universal joint a14 can also perform certain circular jumping motion, so that the jumping of the universal joint a14 can generate certain interference on a medium in the left barrel cavity, and the medium cannot well flow into an extrusion cavity between the stator 2 and the screw 6. And this scheme is the arc through the chamber wall that sets up the left part barrel chamber that keeps off ring 13, feeding chamber 13, leads the flow direction of medium to reduce universal joint A14 and produce the interference that the circle is beated and is caused.

In addition, the transmission shaft 8 is matched and installed with the bearing seat 4 through bearings at the left end and the right end (only the right end is provided with the bearing in the traditional way), so that the circular runout action amplitude of the universal joint B17 is reduced, and the circular runout action amplitude of the universal joint A14 is indirectly reduced.

Alternatively, in a single screw pump structure of a non-conventional universal joint, as shown in fig. 4, the feed cavity 3, the bearing seat 4 and the annular gland 16 form a reinforced sealing structure through the annular packing body 15 and the annular gland 16.

In the reinforced sealing structure, the section of the packing body 15 cut along the axial direction is in a T shape, the gland 16 is provided with a matched groove, and the gland 16 supports against the inner ring and the outer ring of the packing body 15. At the outer ring, a gland 16 presses the packing body 15 against the end face of the feed cavity 3; at the inner ring department, gland 16 produces the power to the packing body 15 leftwards, prevents that packing body 15 from warping to the right (when the medium is filled up and is full of feeding chamber 3 inside, when continuing to flow in, because the middle part medium is mobile and right part medium mobility is less, consequently the middle part medium can't avoid producing certain extrusion to right part medium to let packing body 15 warp to the right side), let packing body 15 and transmission shaft 8 closely laminate, play and strengthen sealed effect.

Alternatively, in a non-conventional universal joint single screw pump structure, as shown in fig. 4, the right barrel chamber of the feed chamber 3 has a pressure reducing structure; in the decompression structure, the right-hand member of connecting axle 7 stretches into in the right part section of thick bamboo chamber of feed cavity 3, and this end department also has flood dragon blade 12, and flood dragon blade 12 forms the thrust to the medium left, avoids the medium to flow right and forms the thrust to the right to packing body 15.

In addition, the term "circle run-out" does not mean a circle run-out. When the common single-screw long pump works, the universal joint B17 keeps unchanged (actually, the universal joint B17 keeps a certain bounce and is only small, and the position is really kept immovably at the position close to the bearing), and other connecting shafts 7, the universal joint A14 and the screw 6 are in free states and present certain swinging, and the operation is called circular bounce operation for convenience of expression.

The above examples only represent preferred embodiments, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention.

Claims

1. The utility model provides a single-screw pump structure of non-traditional universal joint, includes discharge body (1), stator (2), feeding chamber (3), bearing frame (4) and motor (5) that set gradually from a left side to the right side, is provided with screw rod (6) in stator (2), is provided with connecting axle (7) in feeding chamber (3), is provided with transmission shaft (8) in bearing frame (4), and screw rod (6), connecting axle (7), transmission shaft (8) and motor (5) drive in proper order and link to each other, its characterized in that:

the stator (2) is provided with a heating structure; the heating structure heats the flowing medium at the stator (2) and is used for reducing the viscosity of the flowing medium;

the heating structure comprises a heating coil (9), wherein the heating coil (9) is arranged on the stator (2) and is used for simultaneously and electromagnetically heating the stator (2) and the screw (6);

the screw (6) and the stator (2) are heated and then transfer heat to the flowing medium.

2. A non-conventional gimbal, progressive cavity pump configuration as claimed in claim 1, wherein: the stator (2) comprises an inner layer (201) and an outer layer (202), wherein the inner layer (201) and the outer layer (202) are mutually attached, the attachment surfaces of the inner layer and the outer layer are provided with spiral grooves, and heating coils (9) are arranged at the spiral grooves.

3. A non-conventional gimbal, progressive cavity pump configuration as claimed in claim 2, wherein: the outer layer (202) is axially split into two sections, and the two sections are buckled to coat the inner layer (201) and the heating coil (9);

the stator (2) is sleeved with a hoop (10), and two ends of the stator are inserted into the feeding cavity (3) and the end head of the discharging body (1); the feeding cavity (3) and the discharging body (1) are tightened by a pull rod (11) and then fix the stator (2).

4. A non-conventional gimbal, progressive cavity pump configuration as claimed in claim 3, wherein: the screw (6) is a hollow shaft, and liquid with small specific heat capacity is filled in the hollow shaft.

5. A non-conventional gimbal mono-screw pump structure as claimed in any of claims 1 to 4, wherein: a flood dragon blade (12) is arranged on the connecting shaft (7) to form a structure for pushing the medium in the feeding cavity (3) leftwards;

the diameter of the flood dragon blade (12) is gradually reduced along the direction from the motor (5) to the discharging body (1).

6. A non-conventional gimbal, progressive cavity pump configuration as claimed in claim 5, wherein: the left cylinder cavity of the feeding cavity (3) is provided with a flow guide structure;

in the water conservancy diversion structure: the cavity wall of the left cylinder cavity of the feeding cavity (3) is arc-shaped; a baffle ring (13) is arranged at the left end of the connecting shaft (7), and the left end of the connecting shaft (7) is hinged with the screw (6) through a small-diameter shaft via a universal joint A (14); the diameter of the universal joint A (14) is equivalent to that of the connecting shaft (7);

in the flow guide structure, a flowing medium flows to the arc-shaped cavity wall of the left barrel cavity of the feeding cavity (3) after being acted by the baffle ring (13) and then is guided into the extrusion cavity of the stator (2) and the screw (6).

7. A non-conventional gimbal, progressive cavity pump configuration as claimed in claim 6, wherein: the feeding cavity (3) and the bearing seat (4) form a reinforced sealing structure through an annular packing body (15) and an annular gland (16);

in the reinforced seal structure: the section of the packing body (15) cut along the axial direction is in a T shape, the gland (16) is provided with a matched groove, and the gland (16) supports against the inner ring and the outer ring of the packing body (15).

8. A non-conventional gimbal, progressive cavity pump configuration as claimed in claim 7, wherein: the right cylinder cavity of the feeding cavity (3) is provided with a pressure reducing structure;

at the right cylinder cavity of the feeding cavity (3), the right end of the connecting shaft (7) is connected with a transmission shaft (8) through a universal joint B (17), and the transmission shaft (8) is matched and installed with the bearing seat (4) through bearings at the positions close to the left end and the right end;

in the pressure reducing structure: the right end of the connecting shaft (7) extends into the right barrel cavity of the feeding cavity (3), and a dragon blade (12) is arranged at the end of the connecting shaft, the dragon blade (12) forms leftward thrust to a medium, and the medium is prevented from flowing rightwards to form rightward thrust to the filler body (15).