Gear pump capable of preventing high-voltage static electricity

Abstract

The utility model discloses a size gear pump capable of preventing high-voltage static electricity. The size gear pump comprises a driving motor, a damping transmission wheel, a driving wheel transmission shaft, a driving wheel and a driven wheel, a first connecting groove and a second connecting groove are formed in the two ends of the damping transmission wheel respectively, the two grooves do not communicate with each other to form a partition, a partition is formed between a driving wheel transmission shaft and a motor shaft, static electricity at a driving wheel driven shaft is effectively prevented from being transmitted into a driving motor, and therefore electric leakage of the driving motor is avoided; meanwhile, the static electricity on the outer surface of the pump body is reduced, the service life of the gear pump is prolonged, and the safety is improved.

Description

Technical Field

[0001] The utility model relates to the field of pump bodies, in particular to a high-voltage static-proof gear pump. Background Art

[0002] A gear pump is a rotary pump that relies on the change and movement of the working volume formed between the pump cylinder and the meshing gears to transport liquid or increase its pressure. Its structure consists of a driving gear and a driven gear, and through the sealing of the front and rear covers, a closed volume space is formed. The driving gear rotates with the motor and drives the driven wheel to rotate. When working, the volume of the space on the disengaged side between the two gears increases, forming an oil suction chamber with negative pressure, which sucks the liquid from the oil inlet; at the same time, the volume of the space on the meshing side of the gears decreases, forming an oil pressure chamber with positive pressure, which squeezes the liquid to the oil outlet. In this way, the gear pump continuously inhales and discharges hydraulic oil, thereby converting the kinetic energy output by the motor into the pressure energy of the hydraulic oil.

[0003] Gear pumps are used in various working conditions in various industries. Existing gear pumps lack special means to prevent high-voltage static electricity. When the liquid to be pumped has high-voltage static electricity, the static electricity of the liquid in the sealed chamber is easy to leak to the drive motor under high-voltage state, causing damage to the motor and shortening the life of the gear pump. In addition, the outer surface of the gear pump is also in a leakage state, which is easy to cause safety hazards. Utility Model Content

[0004] In order to overcome the deficiencies of the prior art, the purpose of the utility model is to provide a high-voltage static electricity protection gear pump, which can solve the problem that the existing gear pump cannot effectively prevent high-voltage static electricity leakage.

[0005] The utility model is realized by the following technical solutions:

[0006] A high-voltage static electricity prevention gear pump, the high-voltage static electricity prevention gear pump comprising: a driving motor having a motor shaft; a shock-absorbing transmission wheel, both ends of which are provided with: a first connecting groove and a second connecting groove coaxially arranged, the first connecting groove and the second connecting groove are not connected to each other to form a partition; the motor shaft is inserted into the first connecting groove; a driving wheel transmission shaft is inserted into the second connecting groove; a driving wheel and a driven wheel meshing with each other; the driving wheel is pivotally connected to the driving wheel transmission shaft; the high-voltage static electricity prevention gear pump has a liquid chamber for high-voltage static electricity liquid to pass through, and the driving wheel and the driven wheel are both rotatably arranged in the liquid chamber.

[0007] Furthermore, the anti-high-voltage static electricity gear pump also includes: a sealing sleeve; the anti-high-voltage static electricity gear pump also has a main body inner cavity, and the shock-absorbing transmission wheel is arranged inside the main body inner cavity; the sealing sleeve is tightly sleeved on the driving wheel transmission shaft, and the sealing sleeve is arranged between the liquid chamber and the main body inner cavity.

[0008] Furthermore, the anti-high-voltage static electricity gear pump also includes: a cylinder body and a surface cover; the cylinder body has a cavity, and the surface cover is tightly covered on the cylinder body to close and form the liquid chamber.

[0009] Furthermore, the anti-high-voltage electrostatic gear pump also includes two stainless steel plates arranged on the two end surfaces of the liquid chamber, namely: a face steel plate and a bottom steel plate; the face steel plate is fixed on the side of the face cover facing the cylinder body, and the bottom steel plate is fixed on the bottom surface of the cylinder cavity.

[0010] Furthermore, a steel plate mounting groove is concavely provided on the bottom of the face cover, and the face steel plate is embedded in the steel plate mounting groove so that the end surface of the face steel plate is flush with the end surface of the bottom of the face cover; the bottom steel plate fits tightly on the bottom surface of the cavity of the cylinder body.

[0011] Furthermore, the stainless steel plate is a highly wear-resistant 301 stainless steel plate.

[0012] Furthermore, a first ball bearing and a second ball bearing are sleeved on the outer circumference of the driving wheel transmission shaft; the first ball bearing is arranged in the surface cover, and one end of the driving wheel transmission shaft away from the shock-absorbing transmission wheel is connected to the first ball bearing; the second ball bearing is arranged on the cylinder body, and the driving wheel transmission shaft is passed through the second ball bearing, so that the first ball bearing and the second ball bearing support the driving wheel transmission shaft at the same time.

[0013] Furthermore, the anti-high-voltage static electricity gear pump further comprises: a driven wheel transmission shaft; the driven wheel transmission shaft is penetrated into the liquid chamber, and the driven wheel is pivotally connected to the driven wheel transmission shaft.

[0014] Furthermore, a liquid inlet pipe and a liquid outlet pipe are provided on both sides of the cylinder body, and both the liquid inlet pipe and the liquid outlet pipe are connected to the liquid chamber; the liquid inlet pipe is located on the gear disengagement side of the driving wheel and the driven wheel, and the liquid outlet pipe is located on the gear meshing side of the driving wheel and the driven wheel.

[0015] Furthermore, the anti-high-voltage static electricity gear pump also includes: a main body and a mounting rubber seat; a main body inner cavity is opened inside the main body for accommodating the shock-absorbing transmission wheel; the mounting rubber seat is sleeved outside the main body, and the mounting rubber seat is made of non-conductive PPS material.

[0016] Compared with the prior art, the utility model can achieve the following beneficial effects:

[0017] During operation, high-pressure liquid with static electricity enters the liquid chamber, and the output shaft of the driving motor drives the driving wheel through the transmission of the damping transmission wheel and the driving wheel transmission shaft, driving the driving wheel to rotate, and the driven wheel rotates synchronously with the driving wheel. In this process, the space volume on the disengaged side between the two gears increases, forming a liquid suction chamber with negative pressure to suck the liquid; at the same time, on the other side, the space volume on the meshing side of the gears decreases, forming a liquid pressure chamber with positive pressure to squeeze out the liquid; through the continuous working cycle of the pump body, the static electricity-carrying aqueous solution is pressurized to achieve the atomization effect of the solution.

[0018] During the pressurization process, since the high-voltage static water solution fills the liquid chamber, the driving wheel and the driving wheel transmission shaft will be charged with static electricity. In the utility model, a shock-absorbing transmission wheel is used as the intermediate connecting transmission member between the driving wheel transmission shaft and the motor shaft. The shock-absorbing transmission wheel is provided with a first connecting groove and a second connecting groove at both ends thereof, and the two grooves are not connected to each other, so that a partition is formed between the driving wheel transmission shaft and the motor shaft, which effectively prevents the static electricity at the driven shaft of the driving wheel from being transmitted to the driving motor, thereby avoiding leakage of the driving motor, and also reduces the amount of static electricity on the outer surface of the pump body, thereby improving the service life and safety of the gear pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 Shown is a schematic diagram of the appearance of the utility model;

[0020] Figure 2 Shown is a side view of the utility model;

[0021] Figure 3 Shown Figure 2 A cross-sectional view of

[0022] Figure 4 Shown is an exploded schematic diagram of the driving wheel transmission shaft, the damping transmission wheel and the motor shaft;

[0023] Figure 5 Shown is an exploded schematic diagram of the utility model;

[0024] Figure 6 Shown is an exploded schematic diagram of the face cover, face steel plate, bottom steel plate and cylinder body.

[0025] In the figure: 10, driving motor; 11, motor shaft; 20, shock-absorbing transmission wheel; 21, first connecting groove; 22, second connecting groove; 23, partition; 30, driving wheel transmission shaft; 40, driving wheel; 50, driven wheel; 60, liquid chamber; 70, sealing sleeve; 80, main body cavity; 90, cylinder body; 100, face cover; 101, steel plate mounting groove; 110, face steel plate; 120, bottom steel plate; 130, first ball bearing; 140, second ball bearing; 150, driven wheel transmission shaft; 160, liquid inlet pipe; 170, liquid outlet pipe; 180, main body; 190, mounting rubber seat. DETAILED DESCRIPTION

[0026] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form a new embodiment.

[0027] In the description of the present invention, it should be understood that the terms "center", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0028] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0029] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0030] The utility model discloses a high-voltage static-proof gear pump. In a specific embodiment, the gear pump sucks a water solution with high-voltage static electricity of 7000 volts, and the water solution with static electricity achieves an atomization effect through the pressurization of the pump.

[0031] See also Figure 1-Figure 5 The utility model comprises: a driving motor 10, a damping transmission wheel 20, a driving wheel transmission shaft 30, a driving wheel 40 and a driven wheel 50. The driving motor 10 has a motor shaft 11 for outputting a rotational motion. Figure 3 and Figure 4 A first connecting groove 21 and a second connecting groove 22 are respectively provided inside the two ends of the damping transmission wheel 20. The first connecting groove 21 and the second connecting groove 22 are coaxially arranged, and the two grooves are not connected to each other to form a partition 23. The motor shaft 11 is inserted into the first connecting groove 21, and the driving wheel transmission shaft 30 is inserted into the second connecting groove 22. In this way, there is a partition 23 between the motor shaft 11 and the driving wheel transmission shaft 30. The driving wheel 40 and the driven wheel 50 are meshed and transmitted with each other, and the driving wheel 40 is pivotally connected to the driving wheel transmission shaft 30. The anti-high-voltage static gear pump also has a liquid chamber 60 for high-voltage static liquid to pass through. The driving wheel 40 and the driven wheel 50 are both rotatably arranged in the liquid chamber 60, and the high-voltage static liquid is pressurized and atomized in the liquid chamber 60.

[0032] During operation, high-pressure liquid with static electricity enters the liquid chamber 60, and the output shaft of the driving motor 10 drives the driving wheel 40 to rotate through the transmission of the damping transmission wheel 20 and the driving wheel transmission shaft 30, and the driven wheel 50 rotates synchronously with the driving wheel 40. In this process, the space volume on the disengaged side between the two gears increases, forming a liquid suction cavity with negative pressure to suck the liquid; at the same time, on the other side, the space volume on the meshing side of the gears decreases, forming a liquid pressure cavity with positive pressure to squeeze the liquid out; through the continuous working cycle of the pump body, the static electricity-carrying aqueous solution is pressurized to achieve the atomization effect of the solution.

[0033] During the pressurization process, since the high-voltage static water solution fills the liquid chamber 60, the driving wheel 40 and the driving wheel transmission shaft 30 will be charged with static electricity. In the present utility model, a damping transmission wheel 20 is used as an intermediate connecting transmission member between the driving wheel transmission shaft 30 and the motor shaft 11. The damping transmission wheel 20 has a first connecting groove 21 and a second connecting groove 22 at both ends thereof, and the two grooves are not connected to each other, so that a partition 23 is formed between the driving wheel transmission shaft 30 and the motor shaft 11, which effectively prevents the static electricity at the driving wheel transmission shaft 30 from being transmitted to the driving motor 10, thereby avoiding leakage of the driving motor 10, and also reducing the amount of static electricity on the outer surface of the pump body, thereby improving the service life and safety of the gear pump.

[0034] Preferably, in order to further prevent the transmission of static electricity in the liquid chamber 60, the present invention further includes a sealing sleeve 70. Figure 3 The pump body also has a main body inner cavity 80, and the damping transmission wheel 20 is arranged in the main body inner cavity 80. The sealing sleeve 70 is tightly sleeved on the driving wheel transmission shaft 30 and is located between the liquid chamber 60 and the main body inner cavity 80, so that the sealing sleeve 70 further separates the liquid chamber 60 and the main body inner cavity 80 to prevent the static electricity of the liquid from being transmitted to the side of the motor shaft 11.

[0035] Specifically, see Figure 3 and Figure 5 The utility model comprises a cylinder body 90 and a cover 100 . The cylinder body 90 has a cavity therein. The cover 100 is tightly covered on the cylinder body 90 , so that the two are closed to form the above-mentioned liquid chamber 60 .

[0036] Further, see Figure 3 Two stainless steel plates are also provided on both end surfaces of the liquid chamber 60, namely, a face steel plate 110 and a bottom steel plate 120. The face steel plate 110 is fixed on the side of the cover 100 facing the cylinder body 90, while the bottom steel plate 120 is fixed on the bottom surface of the cavity of the cylinder body 90; while ensuring that the liquid chamber 60 does not leak electricity, the output sealing of the pump is effectively improved. Furthermore, the stainless steel plate adopts a highly wear-resistant 301 stainless steel plate.

[0037] During the rotation of the gear set, the end face of the gear needs to fit closely with the inner end face of the liquid chamber 60, and the gap between the two cannot be too large, otherwise some liquid will pass through the gap without the gear meshing and pressurization. Therefore, frequent rotation of the gear is likely to damage the inner wall of the cylinder 90, and the addition of a highly wear-resistant stainless steel plate can improve the wear resistance of the friction between the end face of the gear and the steel plate surface, thereby increasing the life of the product.

[0038] Furthermore, in order to make the installation of the stainless steel plate more snug and prevent liquid from escaping from the installation gap, refer to Figure 6 A steel plate mounting groove 101 is concavely provided on the bottom of the face cover 100, and the face steel plate 110 is embedded in the steel plate mounting groove 101 so that the end surface of the face steel plate 110 is flush with the end surface of the bottom of the face cover 100; the bottom steel plate 120 is tightly fitted on the bottom surface of the cavity of the cylinder body 90.

[0039] Preferably, the two ends of the driving wheel 40 adopt a double ball bearing structure design to ensure the smooth rotation of the driving wheel 40. Figure 3A first ball bearing 130 and a second ball bearing 140 are also sleeved on the outer periphery of the driving wheel transmission shaft 30; the first ball bearing 130 is arranged in the surface cover 100, and one end of the driving wheel transmission shaft 30 away from the shock-absorbing transmission wheel 20 is connected to the first ball bearing 130; the second ball bearing 140 is arranged on the cylinder body 90, and the driving wheel transmission shaft 30 is passed through the second ball bearing 140, so that the first ball bearing 130 and the second ball bearing 140 support the driving wheel transmission shaft 30 at the same time.

[0040] The utility model further comprises a driven wheel transmission shaft 150 penetrating the liquid chamber 60 ; the driven wheel 50 is pivotally connected to the driven wheel transmission shaft 150 and rotates around the driven wheel transmission shaft 150 .

[0041] Of course, in order to realize the oil inlet and outlet functions of the gear pump, refer to Figure 1 , a liquid inlet pipe 160 and a liquid outlet pipe 170 are also provided on both sides of the cylinder body 90, and both the liquid inlet pipe 160 and the liquid outlet pipe 170 are connected to the liquid chamber 60. The liquid inlet pipe 160 is located at the gear disengagement side of the driving wheel 40 and the driven wheel 50, and the liquid enters the liquid chamber 60 from the liquid inlet pipe 160 and enters the liquid suction cavity formed at the gear disengagement side; the liquid outlet pipe 170 is located at the gear meshing side of the driving wheel 40 and the driven wheel 50, and the liquid pressure cavity formed at the meshing side squeezes out the liquid and discharges it out of the pump through the liquid outlet pipe 170.

[0042] Preferably, see Figure 5 The utility model further includes: a main body 180 and a mounting rubber seat 190; a main body inner cavity 80 is provided inside the main body 180 for accommodating the shock-absorbing transmission wheel 20; the mounting rubber seat 190 is sleeved outside the main body 180, and the mounting rubber seat 190 is made of non-conductive PPS material to prevent leakage of the outer surface of the pump body.

[0043] The above-mentioned implementation modes are only preferred implementation modes of the present invention, and cannot be used to limit the protection scope of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A high voltage anti-static gear pump, characterized in that: The anti-high-voltage electrostatic gear pump comprises: A drive motor having a motor shaft; The damping transmission wheel has two ends with a first connecting groove and a second connecting groove coaxially arranged thereon, wherein the first connecting groove and the second connecting groove are not connected to each other to form a partition; the motor shaft is inserted into the first connecting groove; A driving wheel transmission shaft is inserted into the second connecting groove; A driving wheel and a driven wheel meshing with each other; the driving wheel is pivotally connected to the driving wheel transmission shaft; The anti-high-voltage static gear pump has a liquid chamber for high-voltage static liquid to pass through, and the driving wheel and the driven wheel are both rotatably arranged in the liquid chamber.

2. The anti-high-voltage static gear pump according to claim 1, characterized in that: The anti-high-voltage static gear pump further comprises: a sealing sleeve; The anti-high-voltage static electricity gear pump also has a main body inner cavity, and the damping transmission wheel is arranged inside the main body inner cavity; The sealing sleeve is tightly sleeved on the driving wheel transmission shaft, and the sealing sleeve is arranged between the liquid chamber and the inner cavity of the main body.

3. The anti-high-voltage static gear pump according to claim 1, characterized in that: The anti-high-voltage static electricity gear pump further comprises: a cylinder body and a surface cover; the cylinder body has a cavity, and the surface cover is tightly covered on the cylinder body to close and form the liquid chamber.

4. The anti-high-voltage static gear pump according to claim 3, characterized in that: The anti-high-voltage electrostatic gear pump also includes two stainless steel plates arranged on the two end surfaces of the liquid chamber, namely: a face steel plate and a bottom steel plate; the face steel plate is fixed on the side of the face cover facing the cylinder body, and the bottom steel plate is fixed on the bottom surface of the cylinder cavity.

5. The high voltage anti-static gear pump according to claim 4, characterized in that: A steel plate installation groove is concavely provided on the bottom of the face cover, and the face steel plate is embedded in the steel plate installation groove so that the end surface of the face steel plate is flush with the end surface of the bottom of the face cover; the bottom steel plate is tightly attached to the bottom surface of the cavity of the cylinder body.

6. The high voltage anti-static gear pump according to claim 4, characterized in that: The stainless steel plate is a highly wear-resistant 301 stainless steel plate.

7. The high voltage anti-static gear pump according to claim 3, characterized in that: The outer circumference of the driving wheel transmission shaft is also sleeved with a first ball bearing and a second ball bearing; The first ball bearing is arranged in the surface cover, and one end of the driving wheel transmission shaft away from the shock-absorbing transmission wheel is connected to the first ball bearing; The second ball bearing is arranged on the cylinder body, and the driving wheel transmission shaft is passed through the second ball bearing, so that the first ball bearing and the second ball bearing support the driving wheel transmission shaft at the same time.

8. The high voltage anti-static gear pump according to claim 1, characterized in that: The anti-high-voltage static electricity gear pump further comprises: a driven wheel transmission shaft; the driven wheel transmission shaft is arranged in the liquid chamber, and the driven wheel is pivotally connected to the driven wheel transmission shaft.

9. The high voltage anti-static gear pump according to claim 3, characterized in that: A liquid inlet pipe and a liquid outlet pipe are also provided on both sides of the cylinder body, and both the liquid inlet pipe and the liquid outlet pipe are connected to the liquid chamber; the liquid inlet pipe is located on the gear disengagement side of the driving wheel and the driven wheel, and the liquid outlet pipe is located on the gear meshing side of the driving wheel and the driven wheel.

10. The high voltage static protection gear pump according to claim 2, characterized in that: The anti-high-voltage static gear pump also includes: a main body and a mounting rubber seat; a main body inner cavity is provided inside the main body for accommodating the shock-absorbing transmission wheel; the mounting rubber seat is sleeved outside the main body, and the mounting rubber seat is made of non-conductive PPS material.

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