Gear pump unloading groove structure for reducing trapped oil

Abstract

The utility model discloses a gear pump unloading groove structure capable of reducing trapped oil. The gear pump unloading groove structure comprises a pump body, the first unloading groove is formed in one side of the front end and the rear end in the pump body, the other side of the front end and the rear end in the pump body is provided with a second unloading groove, one end of the first unloading groove and one end of the second unloading groove are each of an opening structure, and a rotating rod is arranged in the first unloading groove; one end of the rotating rod is rotationally connected with the inner wall of the first unloading groove, and the other end of the rotating rod extends into the second unloading groove and is rotationally connected with the inner wall of the second unloading groove; and the spiral blade is arranged on the outer portion, located in the first unloading groove and the second unloading groove, of the rotating rod, the spiral blade is fixedly connected with the rotating rod, and the structure solves the problems that after oil enters the unloading grooves, the fluidity is low, and impurities in the oil easily enter the unloading grooves.

Description

Technical Field

[0001] The utility model relates to the technical field of gear pumps, in particular to a gear pump unloading groove structure capable of reducing trapped oil. Background Art

[0002] A gear pump is a common positive displacement pump, and its working principle is based on a pair of meshing gears. A gear pump usually consists of a driving gear and a driven gear, and is driven to rotate by an external drive mechanism. As the gears rotate, the volume of the space on the disengaged side of the gears changes from small to large, forming a vacuum, sucking the liquid into the pump chamber; while the volume of the space on the meshing side of the gears changes from large to small, squeezing the liquid into the pipeline. This process continues, achieving continuous suction and discharge of the liquid, and the unloading groove is an important component structure of the gear pump.

[0003] For example, the Chinese patent "A gear pump unloading groove structure and an external meshing gear pump" with announcement number CN211598989U includes two unloading grooves, the groove line of the unloading groove includes an inner groove line, the symmetric center line between the two inner groove lines is the first axis, the center line connecting the driving gear of the gear pump and the driven gear of the gear pump is the second axis, the first axis and the second axis are parallel, and the first axis is biased towards the low-pressure chamber of the gear pump; the inner groove line includes three sections of involutes, and the three sections of involutes are the same as the partial involutes of the driving gear; the unloading groove includes an inner concave arc groove, the inner concave arc groove is connected to the inner wall of the outer shell of the gear pump, the width of the unloading groove is the same as the minimum distance between the root circles of the driving gear and the driven gear, the involute at one end of the inner groove line close to the second axis, and the connection point with the involute located in the middle position is located on the first tangent; the first tangent passes through the meshing point on one side of the driving gear and the driven gear.

[0004] Although the above-mentioned prior art can realize the gear pump to drive the oil to flow, in actual use, on the one hand, the fluidity of the oil after entering the unloading groove is low. After the oil enters the gear pump, it is discharged through the rotating meshing of the gears, causing part of the oil to be retained in the unloading groove, thereby reducing the oil discharge efficiency. On the other hand, impurities in the oil are easy to enter the unloading groove. When the oil is discharged, the solid impurity particles in the oil will enter the unloading groove, causing the unloading groove to be blocked. Therefore, it does not meet the existing needs. In this regard, we propose a gear pump unloading groove structure that reduces oil entrapment. Utility Model Content

[0005] The utility model aims to provide a gear pump unloading groove structure which reduces oil entrapment, so as to solve the problems in the above background technology that the fluidity of the oil is low after entering the unloading groove, and impurities in the oil are easy to enter the unloading groove.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a gear pump unloading groove structure for reducing trapped oil, comprising a pump body; and further comprising:

[0007] A first unloading groove is arranged on one side of the front and rear ends of the pump body, and a second unloading groove is arranged on the other side of the front and rear ends of the pump body, and one end of the first unloading groove and the second unloading groove are both open structures, and a rotating rod is arranged inside the first unloading groove, one end of the rotating rod is rotatably connected to the inner wall of the first unloading groove, and the other end of the rotating rod extends to the inside of the second unloading groove and is rotatably connected to the inner wall of the second unloading groove;

[0008] The spiral blade is arranged outside the rotating rod which is located inside the first unloading groove and the second unloading groove, and the spiral blade is fixedly connected to the rotating rod.

[0009] Preferably, motors are fixedly provided at the front and rear ends of one side of the outer side of the pump body, and the output shaft of the motor extends to the inside of the first unloading groove and is fixedly connected to the rotating rod.

[0010] Preferably, filter screens are provided inside the first unloading groove and the second unloading groove near the center of the pump body, and the filter screens are fixedly connected to the first unloading groove and the second unloading groove respectively.

[0011] Preferably, an oil suction chamber is provided on one side of the pump body, and an oil pressure chamber is provided on the other side of the pump body.

[0012] Preferably, a driving rod is provided at the upper end of the middle position inside the pump body, one end of the driving rod is rotatably connected to the pump body, and the other end of the driving rod extends to the outside of the pump body, and a driving gear is fixedly provided on the outside of the driving rod located inside the pump body, and a fixing rod is provided at the lower end of the middle position inside the pump body, and the fixing rod is rotatably connected to the pump body, and a transmission gear is fixedly provided on the outside of the fixing rod, and the transmission gear is meshingly connected with the driving gear.

[0013] Preferably, a liquid inlet pipe is provided at a middle position on one side of the pump body, and the liquid inlet pipe is connected to the pump body, and a liquid discharge pipe is provided at a middle position on the other side of the pump body, and the liquid discharge pipe is connected to the pump body.

[0014] Preferably, pump covers are provided at the front and rear ends of the exterior of the pump body, and the pump covers are fixed to the pump body by bolts.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] 1. The utility model can improve the fluidity of the oil entering the unloading groove through the rotating rod and the spiral blade. When the gear pump is working, the motor is turned on at this time, so that the output shaft of the motor drives the rotating rod to rotate, and the rotating rotating rod drives the spiral blade to rotate. At this time, the oil in the first unloading groove and the second unloading groove flows through the spiral blade, so that the oil is discharged from the first unloading groove and the second unloading groove through the openings of the first unloading groove and the second unloading groove. The oil is then discharged from the interior of the gear pump through the cooperation of the driving gear and the transmission gear, so that the oil is prevented from being retained in the unloading groove, thereby improving the fluidity of the oil.

[0017] 2. The utility model is provided with a filter screen, which can prevent impurities in the oil from entering the unloading groove. When the gear pump is working, the oil enters the interior of the pump body through the liquid inlet pipe, and at the same time, the oil enters the interior of the first unloading groove and the second unloading groove. When the oil enters the first unloading groove and the second unloading groove, the solid particle impurities in the oil are intercepted by the filter screen, so that the solid particle device is located on one side of the pump body and the solid particle impurities are directly discharged from the interior of the gear pump along with the oil through the cooperation of the driving gear and the transmission gear. After the pump body has been used for a period of time, clean water is poured into the pump body to clean the interior of the pump body, so as to avoid the first unloading groove and the second unloading groove being blocked by solid particle impurities, reduce dead angles, and make the cleaning of the pump body more convenient.

[0018] 3. The utility model can make the oil entering the pump body more stable through the oil suction chamber and the oil pressure chamber. When the gear pump is working, the oil enters the pump body through the liquid inlet pipe. At this time, the oil first passes through the oil suction chamber and then fills one side of the pump body. When the oil is discharged, the oil is transported to the other side of the pump body through the driving gear and the transmission gear. At this time, the oil continues to flow, so that the oil passes through the oil pressure chamber and then is discharged from the pump body through the discharge pipe. The continuous flow of the oil is maintained by the oil suction chamber and the oil pressure chamber, which improves the pump's delivery efficiency while reducing the pulsation and fluctuation of the oil and maintaining the stability of the flow rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a front view of the internal structure of the utility model;

[0020] Figure 2 It is a top view of the internal structure of the utility model;

[0021] Figure 3 It is a side view of the internal structure of the utility model;

[0022] Figure 4 For the utility model Figure 2 A partial enlarged view of area A.

[0023] In the figure: 1. pump body; 2. liquid inlet pipe; 3. liquid discharge pipe; 4. oil suction chamber; 5. oil pressure chamber; 6. driving rod; 7. driving gear; 8. fixing rod; 9. transmission gear; 10. first unloading groove; 11. second unloading groove; 12. filter screen; 13. motor; 14. rotating rod; 15. spiral blade; 16. pump cover. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0025] See also Figure 1-4 The utility model provides an embodiment: a gear pump unloading groove structure for reducing trapped oil, comprising a pump body 1; and further comprising:

[0026] A first unloading groove 10 is arranged on one side of the front and rear ends of the pump body 1, and a second unloading groove 11 is arranged on the other side of the front and rear ends of the pump body 1, and one end of the first unloading groove 10 and the second unloading groove 11 are both open structures, and a rotating rod 14 is arranged inside the first unloading groove 10, one end of the rotating rod 14 is rotatably connected to the inner wall of the first unloading groove 10, and the other end of the rotating rod 14 extends to the inside of the second unloading groove 11 and is rotatably connected to the inner wall of the second unloading groove 11;

[0027] The spiral blade 15 is disposed outside the rotating rod 14 located inside the first unloading groove 10 and the second unloading groove 11 , and the spiral blade 15 is fixedly connected to the rotating rod 14 .

[0028] During use, when the gear pump is working, the motor 13 is turned on, so that the output shaft of the motor 13 drives the rotating rod 14 to rotate, and the rotating rotating rod 14 drives the spiral blade 15 to rotate. At this time, the oil in the first unloading groove 10 and the second unloading groove 11 flows through the spiral blade 15, so that the oil is discharged from the first unloading groove 10 and the second unloading groove 11 through the openings of the first unloading groove 10 and the second unloading groove 11, and then the oil is discharged from the interior of the gear pump through the cooperation of the driving gear 7 and the transmission gear 9.

[0029] See also Figure 2 A motor 13 is fixedly provided at the front and rear ends of one side of the outer side of the pump body 1, and the output shaft of the motor 13 extends to the inside of the first unloading groove 10 and is fixedly connected to the rotating rod 14, so that the rotating rod 14 can be driven to rotate by the motor 13.

[0030] See also Figure 2 and Figure 4A filter screen 12 is provided inside the first unloading groove 10 and the second unloading groove 11 near the center of the pump body 1, and the filter screen 12 is fixedly connected to the first unloading groove 10 and the second unloading groove 11 respectively, so as to intercept solid particle impurities in the oil through the filter screen 12.

[0031] See also Figure 1 and Figure 2 An oil suction chamber 4 is provided on one side of the pump body 1, and an oil pressure chamber 5 is provided on the other side of the pump body 1, so that the oil flow through the oil suction chamber 4 and the oil pressure chamber 5 is more stable.

[0032] See also Figure 1 and Figure 3 A driving rod 6 is provided at the upper end of the middle position inside the pump body 1, one end of the driving rod 6 is rotatably connected to the pump body 1, and the other end of the driving rod 6 extends to the outside of the pump body 1, and a driving gear 7 is fixedly provided on the outside of the driving rod 6 located inside the pump body 1, and a fixing rod 8 is provided at the lower end of the middle position inside the pump body 1, and the fixing rod 8 is rotatably connected to the pump body 1, and a transmission gear 9 is fixedly provided on the outside of the fixing rod 8, and the transmission gear 9 is meshed with the driving gear 7, so that the transmission gear 9 can be driven to rotate by the driving gear 7.

[0033] See also Figure 2 A liquid inlet pipe 2 is provided at the middle position on one side of the outside of the pump body 1, and the liquid inlet pipe 2 is connected to the pump body 1. A liquid discharge pipe 3 is provided at the middle position on the other side of the outside of the pump body 1, and the liquid discharge pipe 3 is connected to the pump body 1, so that the oil can enter the interior of the pump body 1 through the liquid inlet pipe 2 and the liquid discharge pipe 3.

[0034] See also Figure 2 and Figure 3 A pump cover 16 is provided at the front and rear ends of the pump body 1 , and the pump cover 16 is fixed to the pump body 1 by bolts, so that the pump cover 16 can prevent the pump body 1 from leaking.

[0035] Working principle: When the gear pump is working, the oil enters the interior of the pump body 1 through the liquid inlet pipe 2, and at the same time, the oil enters the interior of the first unloading groove 10 and the second unloading groove 11. When the oil enters the first unloading groove 10 and the second unloading groove 11, the solid particle impurities in the oil are intercepted by the filter 12, so that the solid particle device is on one side of the interior of the pump body 1 and the solid particle impurities are directly discharged from the interior of the gear pump with the cooperation of the driving gear 7 and the transmission gear 9. After the pump body 1 has been used for a period of time, clean water is poured into the interior of the pump body 1 to clean the interior of the pump body 1. The oil enters the interior of the pump body 1 through the liquid inlet pipe 2. At this time, the oil first passes through the oil suction chamber 4 and then fills one side of the pump body 1. When the oil is discharged, the oil is transported to the other side of the pump body 1 through the driving gear 7 and the transmission gear 9. At this time, the oil continues to flow, so that the oil passes through the oil pressure chamber 5 and is discharged from the interior of the pump body 1 through the discharge pipe 3.

[0036] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A gear pump unloading groove structure for reducing oil entrapment, comprising a pump body (1); Features: Also includes: A first unloading groove (10) is arranged on one side of the front and rear ends of the pump body (1), and a second unloading groove (11) is arranged on the other side of the front and rear ends of the pump body (1), and one end of the first unloading groove (10) and the second unloading groove (11) are both open structures, and a rotating rod (14) is arranged inside the first unloading groove (10), one end of the rotating rod (14) is rotatably connected to the inner wall of the first unloading groove (10), and the other end of the rotating rod (14) extends to the inside of the second unloading groove (11) and is rotatably connected to the inner wall of the second unloading groove (11); The spiral blade (15) is arranged outside the rotating rod (14) and located inside the first unloading groove (10) and the second unloading groove (11), and the spiral blade (15) is fixedly connected to the rotating rod (14).

2. A gear pump unloading groove structure for reducing oil entrapment according to claim 1, characterized in that: A motor (13) is fixedly arranged at the front and rear ends of one side of the outside of the pump body (1), and the output shaft of the motor (13) extends into the interior of the first unloading groove (10) and is fixedly connected to the rotating rod (14).

3. A gear pump unloading groove structure for reducing oil entrapment according to claim 1, characterized in that: A filter screen (12) is provided inside the first unloading groove (10) and the second unloading groove (11) near the center of the pump body (1), and the filter screen (12) is fixedly connected to the first unloading groove (10) and the second unloading groove (11), respectively.

4. A gear pump unloading groove structure for reducing oil entrapment according to claim 1, characterized in that: An oil suction chamber (4) is provided on one side of the pump body (1), and an oil pressure chamber (5) is provided on the other side of the pump body (1).

5. A gear pump unloading groove structure for reducing oil entrapment according to claim 1, characterized in that: A driving rod (6) is arranged at the upper end of the middle position inside the pump body (1), one end of the driving rod (6) is rotatably connected to the pump body (1), and the other end of the driving rod (6) extends to the outside of the pump body (1); a driving gear (7) is fixedly arranged outside the driving rod (6) located inside the pump body (1); a fixing rod (8) is arranged at the lower end of the middle position inside the pump body (1), and the fixing rod (8) is rotatably connected to the pump body (1); a transmission gear (9) is fixedly arranged outside the fixing rod (8), and the transmission gear (9) is meshingly connected to the driving gear (7).

6. A gear pump unloading groove structure for reducing oil entrapment according to claim 1, characterized in that: A liquid inlet pipe (2) is provided at a middle position on one side of the outside of the pump body (1), and the liquid inlet pipe (2) is connected to the pump body (1); a liquid discharge pipe (3) is provided at a middle position on the other side of the outside of the pump body (1), and the liquid discharge pipe (3) is connected to the pump body (1).

7. A gear pump unloading groove structure for reducing oil entrapment according to claim 1, characterized in that: Pump covers (16) are provided at the front and rear ends of the outside of the pump body (1), and the pump cover (16) and the pump body (1) are fixed by bolts.

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