A new type of positive displacement pump

Abstract

The utility model discloses a novel volumetric pump relates to volumetric pump technical field, the utility model discloses a one side open pump body and the pump cover of fixed connection through bolt in the open portion of pump body, the chute body is equipped with in the pump body, the one side of chute body is away from the pump cover and is equipped with the slide way, the slide way is slidably connected with the sliding block along its length direction in, the both sides of sliding block are provided with one -way valve subassembly symmetrically, one -way valve subassembly includes inlet one -way valve and outlet one -way valve, and all communicate with the slide way, the setting through the structure guarantees the conveying efficiency simultaneously, has improved equipment reliability and service life significantly.

Description

Technical Field

[0001] This utility model relates to a positive displacement pump, and more specifically, to a novel positive displacement pump. Background Technology

[0002] Positive displacement pumps are pumps that use changes in the internal volume of the pump cylinder to transport liquids, such as reciprocating pumps and rotary pumps. As modern industry develops towards high efficiency and automation, the technical requirements for oil injection pumps are becoming increasingly higher and there are many different types.

[0003] Most existing reciprocating pumps transport liquids by using a plunger driven by a crankshaft to reciprocate and compress the plunger, thereby changing the volume of the pump cylinder. Alternatively, they transport liquids by using the change and movement of the working volume formed between the pump cylinder and meshing gears. One method has a relatively complex structure and suffers from significant mechanical wear after prolonged use, while the other requires more precise meshing parts, making it more difficult to manufacture.

[0004] Therefore, a new solution is needed to address this problem. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides a new type of positive displacement pump, which significantly improves equipment reliability and service life while ensuring conveying efficiency through structural design.

[0006] The technical solution of this utility model is:

[0007] A novel positive displacement pump includes a pump body with one side open and a pump cover fixedly connected to the open part of the pump body by bolts. The pump body is provided with a slide body, and a slide is opened on the side of the slide body opposite to the pump cover. A slider is slidably connected in the slide along its length direction. One-way valve assemblies are symmetrically arranged on both sides of the slider. The one-way valve assembly includes an inlet one-way valve and an outlet one-way valve, both of which are connected to the slide.

[0008] The present invention is further configured such that a cam disk is rotatably connected to the side of the slide body away from the pump cover inside the pump body, and an eccentrically arranged convex shaft is fixedly connected to the side of the cam disk near the slider. A sliding groove that cooperates with the convex shaft is opened on the side of the slider facing the cam disk, and the convex shaft is slidably connected in the sliding groove to form a kinematic pair.

[0009] The present invention is further configured such that a drive shaft is fixedly connected to the side of the cam disc away from the slider and extends out of the pump body, and the drive shaft is fixedly connected to an external drive source through a coupling.

[0010] The present invention is further configured such that an adjustment plate is provided between the cam disc and the bottom wall of the pump body, and a plurality of adjustment bolts are provided on the side of the pump body away from the open part. The adjustment plate is provided with adjustment blind holes corresponding to the adjustment bolts one by one, and the adjustment bolts pass through the pump body and extend into the adjustment blind holes.

[0011] The present invention is further provided that both the adjusting disc and the pump body are provided with through holes for the drive shaft to pass through, and a shaft seal that cooperates with the outer peripheral wall of the drive shaft is fixedly connected in the through holes.

[0012] The present invention is further configured such that the cam disk has a lubricating oil passage, the lubricating oil passage includes a surrounding portion disposed on the side of the cam disk away from the slide body and surrounding the drive shaft, and an extension portion disposed on the side of the cam disk facing the slide body and extending toward the outer peripheral wall of the cam disk. The projections of the extension portions are all located inside the slide. The surrounding portion and the surrounding portion are connected through an oil passage hole. The slider has a dedicated oil passage on the side away from the cam disk. The dedicated oil passage is also connected to the inner peripheral wall of the slide groove through an oil passage hole. On the side of the slider facing the cam disk, there are symmetrically arranged oil passages that are connected to the opening of the slide groove, and the oil passages are connected to the extension portions.

[0013] The present invention is further configured such that a positioning hole is provided on the slide body, and a positioning blind hole communicating with the positioning hole is provided on the side of the pump cover facing the slide body, and a positioning pin is inserted into the positioning hole and the positioning blind hole.

[0014] The beneficial technical effects of this utility model are:

[0015] By setting up a cam shaft and a slider in cooperation, during the rotation of the cam disk, the cam drives the slider to reciprocate along the length of the slide, moving closer to or away from the one-way valve assemblies on both sides. The two sets of one-way valve assemblies on each side of the slider form symmetrical volume chambers. After the medium enters the working chamber through the inlet one-way valve, under the action of the volume change generated by the reciprocating motion of the slider, it is directionally conveyed through the outlet one-way valve, enabling the pump to have forward and reverse conveying capabilities. The rotational motion is converted into linear motion, which significantly improves the reliability and service life of the equipment while ensuring conveying efficiency. Furthermore, it eliminates the need for gear meshing, reducing the dependence on precision meshing parts. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is an exploded view of this utility model;

[0018] Figure 3 yes Figure 2 Enlarged view of point A in the middle;

[0019] Figure 4 This is an exploded view of the present invention from another perspective.

[0020] In the diagram, 1. Pump body; 11. Adjusting bolt; 2. Pump cover; 21. Positioning blind hole; 3. Slide body; 31. Slide; 32. Positioning hole; 33. Positioning pin; 4. Slider; 41. Slide groove; 42. Special oil passage; 43. Oil passage groove; 5. Cam plate; 51. Cam shaft; 52. Drive shaft; 53. Extension; 54. Surrounding part; 6. Adjusting plate; 61. Adjusting blind hole; 62. Sealing ring; 7. Coupling; 8. Check valve assembly; 9. Shaft seal. Detailed Implementation

[0021] In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0022] A new type of positive displacement pump, such as Figures 1-4 As shown, the pump includes a pump body 1 with an internal cavity and a pump cover 2. One side of the cavity is open, and the pump cover 2 is located in the open part of the pump body 1. A slide body 3 is provided inside the cavity. A slide 31 is provided on the side of the slide body 3 away from the pump cover 2. A slider 4 is slidably connected along the length of the slide 31. The two ends of the slider 4 are arc-shaped. One-way valve assemblies 8 are symmetrically arranged on both sides of the slider 4. The one-way valve assembly 8 includes an inlet one-way valve and an outlet one-way valve, both of which are connected to the slide 31. The one-way valve assembly 8 is connected to the slide 31. A convex valve is rotatably connected to the side of the slide body 3 away from the pump cover 2 inside the body. A cam disk 5 is fixedly connected to an eccentrically positioned cam shaft 51 on the side of the cam disk 5 closest to the slider 4. The slider 4 has a groove 41 on the side facing the cam disk 5 that mates with the cam shaft 51. The groove 41 has an elliptical cross-section. The cam shaft 51 is slidably connected in the groove 41 to form a kinematic pair. The cam disk 5 has a lubricating oil passage on the side facing the slider 4. A drive shaft 52 is fixedly connected to the side of the cam disk 5 away from the slider 4 and extends out of the pump body 1. The drive shaft 52 is fixedly connected to an external drive source through a coupling 7. The external drive source can be a motor or a series of devices that can drive the drive shaft 52 to rotate.

[0023] By rotating the cam disk 5, the cam shaft 51 is driven to rotate. Due to the setting of the slide groove 41 on the slider 4, the cam shaft 51 moves in the slide groove 41. Due to the eccentric setting of the cam shaft 51 and the cam disk 5, the cam shaft 51 drives the slider 4 to reciprocate along the length of the slide 31 during the movement in the slide groove 41, moving closer to or away from the one-way valve body assembly on both sides. The two sets of one-way valve assemblies 8 set on each side of the slider 4 form a symmetrical volume chamber. After the medium enters the working chamber through the inlet one-way valve, under the action of the volume change generated by the reciprocating motion of the slider 4, it is directionally conveyed through the outlet one-way valve, so that the pump body 1 has the ability to convey in both directions.

[0024] The cam disk 5 has a lubricating oil passage, which includes a surrounding portion 54 located on the side of the cam disk 5 away from the slide body 3 and surrounding the drive shaft 52, and an extension portion 53 located on the side of the cam disk 5 facing the slide body 3 and extending towards the outer peripheral wall of the cam disk 5. The projection of the extension portion 53 is located within the slide body 31. The surrounding portion 54 is connected to the other surrounding portion 54 through an oil passage hole. The slider 4 has a dedicated oil passage 42 on the side away from the cam disk 5. The dedicated oil passage 42 has an "H" shaped cross section and is also connected to the inner peripheral wall of the slide groove 41 through an oil passage hole. On the side of the slider 4 facing the cam disk 5, there are symmetrically arranged oil passage grooves 43 that are connected to the opening of the slide groove 41, and the oil passage grooves 43 are connected to the extension portion 53. The lubrication channels, combined with the oil passage 43 at the slide groove 41 of the slider 4, allow lubricating oil to enter the dedicated oil passage 42 and the slide groove 41 of the slider 4 through the extension 53, forming a forced lubrication system. This effectively reduces the frictional resistance of the slider 4 during reciprocating motion and reduces the rotational wear of the cam shaft 51 in the slide groove 41, ensuring its service life. The surrounding part 54 is located on the side of the cam plate 5 away from the slide body 3, allowing lubricating oil to enter the surrounding part 54 as well. This also reduces the friction between the cam plate 5 and the adjusting plate 6, further ensuring its service life. The two sides of the slider 4 are arc-shaped, cooperating with the outer peripheral wall of the slide body 3 and the inner peripheral wall of the pump body 1, ensuring the changing effect of the volume cavity and improving transportation efficiency.

[0025] Both the adjusting disc 6 and the pump body 1 are provided with through holes for the drive shaft 52 to pass through. A shaft seal 9 that mates with the outer peripheral wall of the drive shaft 52 is fixedly connected in the through hole. By setting the shaft seal 9, the sealing effect at the drive shaft 52 is ensured, ensuring zero leakage of the medium. An adjusting disc 6 is provided between the cam disc 5 and the inner bottom wall of the pump body 1. Several adjusting bolts 11 are provided on the side of the pump body 1 away from the open part. The adjusting disc 6 is provided with adjusting blind holes 61 that correspond one-to-one with the adjusting bolts 11. The adjusting bolts 11 pass through the pump body 1 and extend into the adjusting blind holes 61. The adjusting bolts 11 are then tightened. The adjusting bolt 11 presses against the inner wall of the adjusting blind hole 61, causing the adjusting disc 6 to move closer to the cam disc 5, which in turn moves the cam disc 5 closer to the slide rail 3. This increases the distance the cam shaft 51 extends into the slide groove 41, reducing the gap between the cam shaft 51 and the slide groove 41. Loosening the adjusting bolt 11 increases the gap. The adjusting bolt 11 allows for precise control of the fit clearance of the moving parts, ensuring both performance and service life. An annular groove is provided on the outer peripheral wall of the adjusting disc 6, and a sealing ring 62 is embedded in the annular groove, ensuring a sealing effect between the adjusting disc 6 and the inner wall of the pump body 1.

[0026] A positioning hole 32 is provided on the slide body 3, and a positioning blind hole 21 communicating with the positioning hole 32 is provided on the pump cover 2. A positioning pin 33 is inserted in the positioning hole 32 and the positioning blind hole 21 to ensure the position of the slide body 31 and prevent the slide body 3 from rotating, thereby ensuring the communication effect between the one-way valve assembly 8 and the slide body 31 and ensuring the stability of the medium transportation.

[0027] Working principle: An external power source drives the cam disk 5 to rotate, which in turn drives the cam shaft 51 to rotate. Due to the groove 41 on the slider 4, the cam shaft 51 moves within the groove 41. Because the cam shaft 51 is eccentrically positioned relative to the cam disk 5, its movement within the groove 41 causes the slider 4 to reciprocate along the length of the slide rail 31, moving closer to or away from the one-way valve assemblies on both sides. The two sets of one-way valve assemblies 8 on each side of the slider 4 form symmetrical volume chambers. The medium passes through the inlet one-way valve... After entering the working chamber, under the volume change caused by the reciprocating motion of the slider 4, the directional delivery is completed through the outlet check valve, enabling the pump body 1 to have forward and reverse delivery capabilities. During the reciprocating motion of the slider 4, in conjunction with the oil groove 43 at the slide groove 41 of the slider 4, the lubricating oil can enter the dedicated oil passage 42 of the slider 4 and the slide groove 41 through the extension 53, forming a forced lubrication system, which effectively reduces the frictional resistance of the slider 4 during reciprocating motion, and at the same time reduces the rotational wear of the cam 51 in the slide groove 41, ensuring service life.

[0028] The overall structure converts rotary motion into linear motion, which significantly improves equipment reliability and service life while ensuring conveying efficiency. Furthermore, it eliminates the need for gear meshing, reducing reliance on precision meshing components.

[0029] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A novel positive displacement pump, characterized in that: The pump body (1) is open on one side and a pump cover (2) is fixedly connected to the open part of the pump body (1) by bolts. The pump body (1) is provided with a slide body (3). A slide (31) is provided on the side of the slide body (3) away from the pump cover (2). A slider (4) is slidably connected in the slide (31) along its length direction. One-way valve assemblies (8) are symmetrically arranged on both sides of the slider (4). The one-way valve assembly (8) includes an inlet one-way valve and an outlet one-way valve, both of which are connected to the slide (31).

2. The novel positive displacement pump according to claim 1, characterized in that: A cam disk (5) is rotatably connected inside the pump body (1) on the side of the slide body (3) away from the pump cover (2). An eccentrically arranged convex shaft (51) is fixedly connected to the side of the cam disk (5) near the slider (4). A groove (41) that cooperates with the convex shaft (51) is opened on the side of the slider (4) facing the cam disk (5). The convex shaft (51) is slidably connected in the groove (41) to form a kinematic pair.

3. A novel positive displacement pump according to claim 2, characterized in that: The cam disk (5) is fixedly connected to a drive shaft (52) on the side away from the slider (4) and extends out of the pump body (1). The drive shaft (52) is fixedly connected to an external drive source through a coupling (7).

4. A novel positive displacement pump according to claim 3, characterized in that: An adjusting plate (6) is provided between the cam disc (5) and the inner bottom wall of the pump body (1). Several adjusting bolts (11) are provided on the side of the pump body (1) away from the open part. Adjusting blind holes (61) corresponding to the adjusting bolts (11) are opened on the adjusting plate (6). The adjusting bolts (11) pass through the pump body (1) and extend into the adjusting blind holes (61).

5. A novel positive displacement pump according to claim 4, characterized in that: Both the adjusting disc (6) and the pump body (1) are provided with through holes for the drive shaft (52) to pass through, and a shaft seal (9) that cooperates with the outer peripheral wall of the drive shaft (52) is fixedly connected in the through hole.

6. A novel positive displacement pump according to claim 3, characterized in that: The cam disk (5) is provided with a lubricating oil passage. The lubricating oil passage includes a surrounding part (54) arranged around the drive shaft (52) on the side of the cam disk (5) away from the slide body (3) and an extension part (53) extending towards the outer peripheral wall of the cam disk (5) on the side of the cam disk (5) facing the slide body (3). The projection of the extension part (53) is located in the slide (31). The surrounding part (54) and the surrounding part (54) are connected through an oil passage hole. The slider (4) is provided with a special oil passage (42) on the side away from the cam disk (5). The special oil passage (42) is also connected to the inner peripheral wall of the slide groove (41) through an oil passage hole. On the side of the slider (4) facing the cam disk (5), there are symmetrically arranged oil passages (43) that are connected to the opening of the slide groove (41). The oil passage (43) is connected to the extension part (53).

7. A novel positive displacement pump according to claim 1, characterized in that: The slide body (3) is provided with a positioning hole (32), and the pump cover (2) is provided with a positioning blind hole (21) communicating with the positioning hole (32) on the side facing the slide body (3). A positioning pin (33) is inserted into the positioning hole (32) and the positioning blind hole (21).

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