Roller pump

Abstract

The invention discloses a roller pump, which relates to the technical field of pumps, and comprises a pump cavity, a rotor eccentrically and rotatably arranged in the pump cavity, a plurality of columnar rollers, U-shaped grooves circumferentially and equidistantly distributed on the rotor, a guide sliding piece and an auxiliary liquid outlet rolling mechanism, the guiding sliding pieces are arranged in the U-shaped grooves, the columnar rollers are rotationally arranged on the guiding sliding pieces, and the guiding sliding pieces are used for guiding the columnar rollers to slide along the corresponding U-shaped grooves. The cylindrical rollers distributed on the rotor slide stably relative to the U-shaped grooves by means of sliding fit of the connecting sliding pieces and the connecting sliding grooves, noise and large mechanical abrasion caused by collision of the cylindrical rollers to the inner walls of the U-shaped grooves due to shaking in the rotating process of the rotor are avoided, and due to the existence of the connecting sliding pieces and the connecting sliding grooves, the service life of the rotor is prolonged. A large gap can be reserved between the columnar roller and the inner wall of the U-shaped groove, and the liquid sucking and feeding effect is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of pumps, and in particular to a roller pump. Background Art

[0002] A pump is a device used to transport fluids. There are many types of pumps, and roller pumps are one of them. Roller pumps are often used to transport thin liquids, such as some oils.

[0003] The existing roller pump includes an eccentrically arranged rotor and cylindrical rollers distributed circumferentially on the rotor, and a slot for the cylindrical rollers to slide is provided on the rotor. During the rotation of the rotor, the rotor carries the cylindrical rollers. Due to the eccentric design, the volume between the cylindrical rollers at different positions and the inner surface of the pump chamber will change. When the cylindrical rollers move from the minimum radius of the eccentric shaft to the maximum radius, the volume of the working space gradually increases, forming a vacuum, thereby sucking liquid from the liquid inlet; conversely, when the cylindrical rollers move from the maximum radius to the minimum radius, the volume of the working space gradually decreases, squeezing the liquid out of the liquid outlet.

[0004] The shortcomings of the existing roller pumps are: in order to enable the existing roller pumps to effectively absorb the liquid into the trough body matched with the columnar rollers, so as to facilitate the subsequent extrusion and transportation, it is necessary to have a certain gap between the columnar rollers and the trough body. However, in order to prevent the columnar rollers from shaking and colliding with the inner wall of the trough body during the rotation of the rotor, thereby generating noise and greater mechanical wear, the gap is set to be smaller, and the liquid is not easy to quickly fill the trough body or be pressed out of the trough body. That is, the smaller gap will lead to poor liquid suction and delivery efficiency of the trough body, and the effect is not good enough; and when the existing columnar rollers roll through the liquid outlet, the overlap time between the trough body and the liquid outlet is short, which is not convenient for squeezing and draining the liquid in the trough body, resulting in an insufficient liquid transportation effect. Summary of the invention

[0005] The object of the present invention is to provide a roller pump to solve the technical problems in the prior art that the roller pump has poor efficiency in conveying liquid and poor conveying effect.

[0006] The technical problem to be solved by the present invention can be achieved by the following technical solutions:

[0007] A roller pump comprises a pump chamber, a rotor eccentrically arranged in the pump chamber, a plurality of columnar rollers and U-shaped grooves equidistantly distributed on the rotor in the circumferential direction, a liquid inlet is distributed on one side of the pump chamber, a liquid outlet is distributed on the other side, the columnar rollers are matched with the U-shaped grooves; a gradually changing volume chamber is arranged between the rotor and the pump chamber, and further comprises:

[0008] A guide slide, wherein the guide slide is arranged inside the U-shaped groove, and the cylindrical roller is rotatably arranged on the guide slide, and the guide slide is used to guide the cylindrical roller to slide along the corresponding U-shaped groove;

[0009] The auxiliary liquid discharge rolling mechanism is arranged on the inner wall of the pump cavity, and the columnar roller rolls along the inner wall of the pump cavity, and the liquid is pressed to the liquid outlet through the auxiliary liquid discharge rolling mechanism.

[0010] As a further solution of the present invention: the gradually changing volume chamber includes a gradually increasing cavity and a gradually decreasing cavity, the gradually increasing cavity is arranged on a side of the pump chamber close to the liquid inlet, and the gradually decreasing cavity is arranged on a side of the pump chamber close to the liquid outlet.

[0011] As a further solution of the present invention: the guide slide includes a connecting slide and a connecting slide groove, the connecting slide groove is opened at the inner bottom of the U-shaped groove, one side of the connecting slide slides and is inserted into the connecting slide groove, and the other side is fixedly connected to a limiting connecting member for rotating the connecting columnar roller, and the end of the connecting slide groove away from the connecting slide is connected to a pumping channel, and the end of the pumping channel is an opening and extends to the outer wall of the rotor.

[0012] As a further solution of the present invention: the position-limiting connecting member includes a missing ring body, two of which are provided and fixedly connected to the connecting slide, and both ends of the columnar roller are respectively fitted and embedded in the corresponding missing ring bodies.

[0013] As a further solution of the present invention: the connecting slide is a plate-shaped structure, and the shape of the connecting slide matches the shape of the connecting slide.

[0014] As a further solution of the present invention: the auxiliary liquid outlet rolling mechanism is provided with two groups and is distributed on the inner wall of the pump cavity on both sides of the liquid outlet.

[0015] As a further solution of the present invention: each group of the auxiliary liquid outlet rolling mechanism includes an arc-shaped channel, a guide port connected to the arc-shaped channel, and an extrusion tooth body. The arc-shaped channel is arranged in the side wall of the pump chamber close to the liquid outlet, and one end of the arc-shaped channel is provided with a connecting port connected to the liquid outlet. There are multiple guide ports and they are evenly distributed along the inner wall of the pump chamber. There are multiple extrusion tooth bodies, and the extrusion tooth bodies are correspondingly arranged on one side of the guide port. Each of the cylindrical rollers has multiple convex strips that are evenly distributed circumferentially and match the extrusion tooth bodies.

[0016] As a further solution of the present invention: guide grooves are provided between adjacent convex strips.

[0017] As a further solution of the present invention: balls are distributed on each of the convex strips.

[0018] Beneficial effects of the present invention:

[0019] 1. Each cylindrical roller distributed on the rotor of the present invention slides smoothly relative to the U-shaped groove by sliding cooperation with the provided connecting slide and the connecting groove, thereby preventing the cylindrical roller from shaking and colliding with the inner wall of the U-shaped groove during the rotation of the rotor, generating noise and large mechanical wear. In addition, due to the presence of the connecting slide and the connecting groove, a large gap can be reserved between the cylindrical roller and the inner wall of the U-shaped groove to ensure the liquid suction and delivery effect.

[0020] 2. The cylindrical roller of the present invention slides relative to the U-shaped groove under the combined action of the centrifugal force of the rotor and the spatial change of the gradually changing volume cavity, and during the sliding process, the connecting slide is driven to slide relative to the connecting slide groove. Whenever it moves close to the liquid inlet, the connecting slide slides outward relative to the connecting slide groove, generating a negative pressure effect, and assisting in liquid suction through the pumping channel. Whenever it moves close to the liquid outlet, the connecting slide squeezes the liquid in the connecting slide groove, and assists in sending out the liquid through the pumping channel, thereby enhancing the liquid delivery effect.

[0021] 3. In the present invention, whether before the cylindrical roller reaches the liquid outlet or after passing through the liquid outlet, the cylindrical roller can effectively ensure that a certain amount of liquid enters the arc-shaped channel through the set guide port and is transported to the liquid outlet through the extrusion effect, and when the cylindrical roller rolls through the arc-shaped channel, the convex strips and the distributed extrusion teeth are engaged and squeezed, thereby facilitating the pressurization of part of the liquid, promoting the liquid to flow to the liquid outlet, ensuring the liquid delivery effect, improving the liquid delivery efficiency, and avoiding the cylindrical roller and the liquid outlet The position overlaps for too short a time, and cannot fully squeeze and transport a certain amount of liquid.

[0022] 4. The convex strips evenly distributed on the cylindrical roller of the present invention facilitate the auxiliary liquid to enter the U-shaped groove or flow out of the U-shaped groove during the rotation of the cylindrical roller. Moreover, when passing through the liquid outlet, since the cylindrical roller is in a rotating state, the liquid in the guide groove distributed between adjacent convex strips can also be subjected to a certain centrifugal force and accelerate to flow away from the liquid outlet, thereby improving the overall liquid delivery efficiency and effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention will be further described below in conjunction with the accompanying drawings.

[0024] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 It is a schematic diagram of the top view of the structure of the cylindrical roller and the pump chamber in the present invention;

[0026] Figure 3 yes Figure 2 A schematic diagram of the enlarged structure at A in the middle;

[0027] Figure 4 yes Figure 3A schematic diagram of the enlarged structure at B in the middle;

[0028] Figure 5 It is a schematic structural diagram of the cylindrical roller and the missing ring body in the present invention;

[0029] Figure 6 It is a schematic structural diagram of the cylindrical roller in the present invention being connected with the missing ring body through the ball.

[0030] In the figure: 1. pump body; 2. rotor; 3. drive shaft; 4. liquid inlet; 5. liquid outlet; 6. cylindrical roller; 7. connecting slide groove; 8. connecting slide; 9. pump chamber; 10. convex strip; 11. missing ring body; 12. pumping flow channel; 13. arc-shaped channel; 14. guide port; 15. extrusion tooth body; 16. bearing; 17. gradually enlarged cavity; 18. guide groove; 19. connecting port; 20. ball; 21. gradually reduced cavity; 22. U-shaped groove. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe 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 creative work are within the scope of protection of the present invention.

[0032] like Figure 1-Figure 6As shown, a roller pump comprises a pump body 1, a pump chamber 9, a rotor 2 eccentrically arranged in the pump chamber 9, and a plurality of cylindrical rollers 6. The pump chamber 9 is arranged inside the pump body 1, the rotor 2 is a columnar body, the pump chamber 9 is a columnar cavity, a liquid inlet 4 is distributed on one side of the pump chamber 9, and a liquid outlet 5 is distributed on the other side. A drive shaft 3 is fixedly installed at the central axis of the rotor 2, and the drive shaft 3 passes through the pump body 1 to facilitate connection with an external drive source, such as a motor, and the drive shaft 3 is rotatably connected to the pump body 1 through a bearing 16, and the position through which it passes is sealed by a rotating shaft seal; a plurality of U-shaped grooves 22 corresponding to the cylindrical rollers 6 are equidistantly distributed on the rotor 2 in the circumferential direction; because the rotor 2 is eccentrically arranged in the pump chamber 9, one side of it is in contact with the inner wall of the pump chamber 9, and the other side forms a gradually changing volume cavity between the pump chamber 9, so that each cylindrical roller 6 is rotatably arranged on the opposite The cylindrical roller 6 is in the U-shaped groove 22 and can slide along the U-shaped groove 22. When the rotor 2 rotates clockwise at a certain speed, the cylindrical roller 6 at each position is subjected to the centrifugal force and always contacts the inner wall of the pump chamber 9. When the cylindrical roller 6 rotates to the position of the liquid inlet 4 along with the rotor 2, it just enters the position of the gradually increasing gradual volume cavity. Therefore, in this process, the cylindrical roller 6 slides outward relative to the U-shaped groove 22 under the action of centrifugal force, which facilitates the suction of liquid from the liquid inlet 4 into the corresponding U-shaped groove 22. At the same time, the liquid will also enter the gradually increasing gradual volume cavity. Then, the liquid is pushed by the cylindrical roller 6 and approaches the liquid outlet 5. At this time, the gradual volume cavity gradually becomes smaller, which is convenient for squeezing the liquid. At the same time, the cylindrical roller 6 will also squeeze into the corresponding U-shaped groove 22 due to space limitations, so as to increase the liquid pressure and press it out from the liquid outlet 5.

[0033] The roller pump also includes a guide slide for guiding the columnar roller 6 to slide along the corresponding U-shaped groove 22 and an auxiliary liquid discharge rolling mechanism. The guide slide is arranged inside the U-shaped groove 22, and the columnar roller 6 is rotatably arranged on the guide slide. In the prior art, in order to allow liquid to be sucked into the U-shaped groove 22 for subsequent extrusion and pressurization, there is a gap between the columnar roller 6 and the inner wall of the U-shaped groove 22. However, in order to avoid the columnar roller 6 shaking and colliding with the inner wall of the U-shaped groove 22 during the rotation of the rotor 2, thereby generating noise and greater mechanical wear, the gap is set smaller. However, a smaller gap will lead to a poor liquid suction and delivery efficiency of the U-shaped groove 22, and the effect is not good enough. Therefore, a guide slide is arranged to allow the columnar roller 6 to slide smoothly relative to the U-shaped groove 22, thereby reducing mechanical wear. At the same time, a larger gap can be reserved between the columnar roller 6 and the inner wall of the U-shaped groove 22 to ensure the liquid suction and delivery effect.

[0034] The auxiliary liquid discharge rolling mechanism is arranged on the inner wall of the pump chamber 9, and the auxiliary liquid discharge rolling mechanism cooperates with the columnar roller 6. The columnar roller 6 rolls along the inner wall of the pump chamber 9, and the liquid is pressed to the liquid outlet 5 through the auxiliary liquid discharge rolling mechanism. In this way, the liquid delivery effect can be effectively enhanced to avoid the columnar roller 6 passing through the liquid outlet 5 for a short time, and failing to deliver a certain amount of liquid within a unit time.

[0035] In some specific embodiments, such as Figure 2 As shown, the gradually variable volume chamber includes a gradually increasing chamber 17 and a gradually decreasing chamber 21. The gradually increasing chamber 17 is arranged on the side of the pump chamber 9 close to the liquid inlet 4, and the size of the gradually increasing chamber 17 gradually increases. The gradually decreasing chamber 21 is arranged on the side of the pump chamber 9 close to the liquid outlet 5, and the size of the gradually decreasing chamber 21 gradually decreases. The gradually increasing chamber 17 and the gradually decreasing chamber 21 are arranged continuously, and the maximum size position of the gradually increasing chamber 17 is the maximum size position of the gradually decreasing chamber 21.

[0036] In some specific embodiments, in combination Figure 1 and Figure 3 As shown, the guide slide includes a connecting slide 8 and a connecting slide groove 7. The connecting slide groove 7 is opened at the inner bottom of the U-shaped groove 22. One side of the connecting slide 8 slides and is inserted into the connecting slide groove 7. The other side is fixedly connected with a limiting connection for rotating the connecting columnar roller 6. The end of the connecting slide groove 7 away from the connecting slide 8 is connected to a pumping channel 12. The end of the pumping channel 12 is open and extends to the outer wall of the rotor 2.

[0037] Among them, the limiting connecting part includes a missing ring body 11, two missing ring bodies 11 are provided, and are fixedly connected to the connecting slide 8. The two ends of the cylindrical roller 6 are respectively embedded in the corresponding missing ring bodies 11. The missing ring body 11 embraces the cylindrical roller 6 so that it cannot fall off. At the same time, the cylindrical roller 6 can also rotate in the missing ring body 11, thereby realizing the rolling of the cylindrical roller 6 along the inner wall of the pump chamber 9.

[0038] When the cylindrical roller 6 is subjected to the combined effects of centrifugal force and the squeezing of the internal space of the pump chamber 9 and slides relative to the U-shaped groove 22, the cylindrical roller 6 can directly rely on the connecting slide 8 to slide smoothly along the connecting slide 7, and the connecting slide 8, the connecting slide 7 and the pumping channel 12 form a piston structure. When the cylindrical roller 6 enters the gradually enlarged cavity 17 from the position of the liquid inlet 4, the cylindrical roller 6 slides toward the outside of the U-shaped groove 22 due to the enlarged space and the action of centrifugal force. During this process, the connecting slide 8 slides relative to the connecting slide 7 to generate negative pressure, and relies on the pumping channel 12 to draw a part of the liquid into the connecting slide 7. When the cylindrical roller 6 moves to the gradually smaller cavity 21, it slides and squeezes into the U-shaped groove 22 due to space limitations. During this process, the connecting slide 8 squeezes the liquid in the connecting slide 7, thereby pressing the liquid out through the pumping channel 12, assisting in the transportation of the liquid, and also achieving the internal and external balance of the connecting slide 7, which is convenient for the sliding of the connecting slide 8.

[0039] In some specific embodiments, the connecting slide 8 is a plate-like structure, and the shape of the connecting slide groove 7 matches the shape of the connecting slide 8. The connecting slide 8 with a plate-like structure facilitates the connection and support of the missing ring bodies 11 arranged in pairs.

[0040] In some specific embodiments, two groups of auxiliary liquid discharge rolling mechanisms are provided and distributed on the inner wall of the pump cavity 9 on both sides of the liquid outlet 5, so as to enhance the effect of conveying liquid.

[0041] Among them, combined Figure 3 and Figure 4As shown, each group of auxiliary liquid discharge rolling mechanisms includes an arc-shaped channel 13, a guide port 14 connected to the arc-shaped channel 13, and an extrusion tooth body 15. The arc-shaped channel 13 is arranged in the side wall of the pump chamber 9 close to the liquid outlet 5. One end of the arc-shaped channel 13 is provided with a connecting port 19 connected to the liquid outlet 5. There are multiple guide ports 14, which are evenly distributed along the inner wall of the pump chamber 9. The guide ports 14 are all inclined at a certain angle to the location of the liquid outlet 5. There are multiple extrusion teeth 15. The extruded tooth body 15 is correspondingly arranged on one side of the guide port 14, and the side of the extruded tooth body 15 close to the guide port 14 is aligned with the internal space of the guide port 14, and is an inclined surface, which cooperates with the guide port 14. Each cylindrical roller 6 is circumferentially equidistantly distributed with a plurality of convex strips 10 that cooperate with the extruded tooth body 15, and the outer wall of the convex strip 10 is also an inclined surface, which cooperates with the extruded tooth body 15, and the convex strip 10 is connected to the cylindrical roller 6 and cooperates with the missing ring body 11, and the cylindrical roller 6 is along the When the inner wall of the pump chamber 9 rolls to the position of the arc-shaped channel 13, a part of the liquid in the gradually smaller cavity 21 will directly enter the arc-shaped channel 13 through the guide port 14 due to the extrusion effect, and then directly enter the liquid outlet 5 through the connecting port 19. Whether before the cylindrical roller 6 reaches the liquid outlet 5 or after passing through the liquid outlet 5, a certain amount of liquid can be effectively delivered to the liquid outlet 5 through the extrusion effect, so as to avoid the position overlap time of the cylindrical roller 6 and the liquid outlet 5 being too short, and a certain amount of liquid cannot be fully extruded and delivered. When the cylindrical roller 6 rolls through the arc-shaped channel 13, the convex strips 10 distributed on the cylindrical roller 6 are meshed with the extrusion teeth 15 distributed on the outside of the arc-shaped channel 13, similar to two meshing gears. During the meshing process, the corresponding convex strips 10 bite with the extrusion teeth 15 and produce an extrusion effect, thereby facilitating the pressurization of part of the liquid and squeezing it through the guide port 14, thereby improving the liquid delivery efficiency.

[0042] It should also be noted that since the convex strips 10 are evenly distributed on the cylindrical roller 6, guide grooves 18 are formed between adjacent convex strips 10. During the rolling process of the cylindrical roller 6, the raised convex strips 10 and the guide grooves 18 can conveniently assist the liquid to enter the U-shaped groove 22 or flow out of the U-shaped groove 22. Moreover, when passing through the liquid outlet 5, since the cylindrical roller 6 is in a rotating state, the liquid distributed in the guide groove 18 can also be subjected to a certain centrifugal force and accelerate to flow away from the liquid outlet 5, thereby improving the overall liquid delivery efficiency and effect.

[0043] In some specific embodiments, such as Figure 6As shown, in order to facilitate the sliding of the convex strip 10 relative to the inner wall of the missing ring body 11 and the rotation of the cylindrical roller 6, a ball 20 is distributed on each convex strip 10. The specific installation position is: the matching shell to which the ball 20 is connected is fixedly installed at the raised position of the convex strip 10, and the ball 20 is rotatable in the matching shell, and a part of the ball 20 is exposed to the outside, so as to contact the inner wall of the missing ring body 11 and rotate the cylindrical roller 6.

[0044] In order to facilitate the understanding of the embodiments of this solution by those skilled in the art, the working principle of this solution is briefly described in combination with specific application scenarios:

[0045] When the rotor 2 rotates clockwise at a certain speed, the cylindrical rollers 6 circumferentially distributed at various positions on the rotor 2 are subjected to the centrifugal force and always press against the inner wall of the pump chamber 9. When the cylindrical rollers 6 rotate to the position of the liquid inlet 4 along with the rotor 2, the cylindrical rollers 6 enter the position of the gradually enlarged cavity 17. At this time, the cylindrical rollers 6 slide toward the outside of the U-shaped groove 22 due to the enlarged space and the centrifugal force. During this process, the connecting slide 8 slides relative to the connecting slide 7 to generate negative pressure, and a part of the liquid is sucked into the connecting slide 7 by relying on the pumping channel 12. At the same time, the space in the corresponding U-shaped groove 22 is also expanded to facilitate the suction of the liquid. Then the liquid will also enter the gradually enlarged cavity 17, and flow to the position of the liquid outlet 5 as pushed by the cylindrical rollers 6.

[0046] When the cylindrical roller 6 rolls toward the liquid outlet 5, it enters the gradually decreasing cavity 21. At this time, the cylindrical roller 6 slides and squeezes into the U-shaped groove 22 due to the gradually decreasing space. During this process, the connecting slide 8 squeezes the liquid in the connecting slide 7, thereby pressing the liquid out through the pumping channel 12 to assist in conveying the liquid. In addition, the rolling cylindrical roller 6 also squeezes the liquid in the gradually decreasing cavity 21, thereby facilitating the increase of liquid pressure and pressing it out from the liquid outlet 5.

[0047] When the cylindrical roller 6 rolls along the inner wall of the pump chamber 9 and is about to reach the position of the liquid outlet 5 or just passes through the position of the liquid outlet 5, the cylindrical roller 6 will roll through the position of a section of the arc-shaped channel 13, and when the cylindrical roller 6 passes the position before and after the liquid outlet 5, it will squeeze the liquid. At this time, due to the squeezing effect, a part of the liquid in the gradually smaller cavity 21 will directly enter the corresponding arc-shaped channel 13 through the guide port 14, and then directly enter the liquid outlet 5 through the connecting port 19, so as to avoid the position of the cylindrical roller 6 and the liquid outlet 5 overlapping for too short a time, and fail to fully squeeze and transport a certain amount of liquid;

[0048] And when the cylindrical roller 6 rolls through the arc-shaped channel 13, the convex strips 10 distributed on the cylindrical roller 6 mesh with the extrusion teeth 15 distributed on the outside of the arc-shaped channel 13, similar to two meshing gears. During the meshing process, the corresponding convex strips 10 mesh with the extrusion teeth 15 and produce an extrusion effect, thereby facilitating the pressurization of part of the liquid, and the liquid is squeezed through the guide port 14, thereby improving the liquid delivery efficiency.

[0049] It should also be noted that since the convex strips 10 are evenly distributed on the cylindrical roller 6, guide grooves 18 are formed between adjacent convex strips 10. During the rolling process of the cylindrical roller 6, the raised convex strips 10 and the guide grooves 18 can conveniently assist the liquid to enter the U-shaped groove 22 or flow out of the U-shaped groove 22. Moreover, when passing through the liquid outlet 5, since the cylindrical roller 6 is in a rotating state, the liquid distributed in the guide groove 18 can also be subjected to a certain centrifugal force and accelerate to flow away from the liquid outlet 5, thereby improving the overall liquid delivery efficiency and effect.

[0050] And during the rolling process of the cylindrical roller 6, the raised convex strips 10 and the guide grooves 18 can conveniently assist the liquid to enter the U-shaped groove 22 or flow out of the U-shaped groove 22. When passing through the liquid outlet 5, since the cylindrical roller 6 is in a rotating state, the liquid distributed in the guide groove 18 can also be subjected to a certain centrifugal force and accelerate to flow away from the liquid outlet 5, thereby improving the overall liquid delivery efficiency and effect.

[0051] Several embodiments of the present invention are described in detail above, but the embodiments of the present invention are not limited thereto and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A roller pump, comprising a pump chamber (9), a rotor (2) eccentrically arranged in the pump chamber (9), a plurality of columnar rollers (6), and U-shaped grooves (22) equidistantly distributed on the rotor (2) in the circumferential direction, wherein a liquid inlet (4) is distributed on one side of the pump chamber (9), and a liquid outlet (5) is distributed on the other side, and the columnar rollers (6) are correspondingly matched with the U-shaped grooves (22); a gradually changing volume chamber is arranged between the rotor (2) and the pump chamber (9), characterized in that: Also includes: A guide slide, the guide slide being arranged inside the U-shaped groove (22), and the columnar roller (6) being rotatably arranged on the guide slide, and the guide slide being used to guide the columnar roller (6) to slide along the corresponding U-shaped groove (22); The auxiliary liquid discharge rolling mechanism is arranged on the inner wall of the pump chamber (9), and the columnar roller (6) rolls along the inner wall of the pump chamber (9), and the liquid is pressed to the liquid outlet (5) through the auxiliary liquid discharge rolling mechanism.

2. A roller pump according to claim 1, characterized in that: The gradually changing volume chamber comprises a gradually increasing chamber (17) and a gradually decreasing chamber (21); the gradually increasing chamber (17) is arranged on a side of the pump chamber (9) close to the liquid inlet (4), and the gradually decreasing chamber (21) is arranged on a side of the pump chamber (9) close to the liquid outlet (5).

3. A roller pump according to claim 1, characterized in that: The guide slide comprises a connecting slide (8) and a connecting slide groove (7), wherein the connecting slide groove (7) is arranged at the inner bottom of the U-shaped groove (22), one side of the connecting slide (8) is slidably inserted into the connecting slide groove (7), and the other side is fixedly connected with a limiting connecting member for rotatably connecting a columnar roller (6), and one end of the connecting slide groove (7) away from the connecting slide (8) is connected with a pumping channel (12), and the end of the pumping channel (12) is open and extends to the outer wall of the rotor (2).

4. A roller pump according to claim 3, characterized in that: The position-limiting connecting member comprises a missing ring body (11), two missing ring bodies (11) are provided and fixedly connected to the connecting slide (8), and two ends of the columnar roller (6) are respectively fitted and embedded in the corresponding missing ring bodies (11).

5. A roller pump according to claim 3, characterized in that: The connecting slide (8) is a plate-shaped structure, and the shape of the connecting slide groove (7) matches the shape of the connecting slide (8).

6. A roller pump according to claim 1, characterized in that: The auxiliary liquid outlet rolling mechanism is provided in two groups and is distributed on the inner wall of the pump cavity (9) on both sides of the liquid outlet (5).

7. A roller pump according to claim 1, characterized in that: Each group of auxiliary liquid discharge rolling mechanisms comprises an arc-shaped channel (13), a flow guide port (14) connected to the arc-shaped channel (13), and an extrusion tooth body (15); the arc-shaped channel (13) is arranged in the side wall of the pump chamber (9) close to the liquid outlet (5); one end of the arc-shaped channel (13) is provided with a communication port (19) connected to the liquid outlet (5); a plurality of the flow guide ports (14) are provided and are evenly distributed along the inner wall of the pump chamber (9); a plurality of the extrusion tooth bodies (15) are provided and are correspondingly arranged on one side of the flow guide port (14); and a plurality of convex strips (10) matching the extrusion tooth bodies (15) are evenly distributed in the circumferential direction on each of the columnar rollers (6).

8. A roller pump according to claim 7, characterized in that: A guide groove (18) is provided between adjacent convex strips (10).

9. A roller pump according to claim 7, characterized in that: Rolling balls (20) are distributed on each of the convex strips (10).

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