TWM542699U - Seam filling element for internal gear pump - Google Patents

Description

Interstitial assembly for internal rotary gear pumping

This creation is related to the gap filler component, especially a gap filler component suitable for internal rotation gear pumping and which can improve the pressure retention, stability and energy saving effect, thereby improving the current surge of the drive motor and the hydraulic oil. The temperature rises and the internal gear and the external gear increase the wear due to the mechanism, and the overall efficiency and service life of the pressure compensation of the internal rotation gear pump can be improved.

The conventional internal gear pump has the advantages of no trapping oil characteristics, stable conveying, high efficiency, low noise and long service life, and is widely used for transporting petroleum, chemicals, paints, dyes, foods, greases, medicines, etc. In the industry, Newtonian liquid or non-Newtonian liquid; and the type of liquid transported can vary from light, volatile liquids to heavy, viscous, and even semi-solid liquids. Wherein, the internal rotation gear pump utilizes a movable gap-filling component (or a crescent plate) to separate the high and low pressure chambers to form a pressure compensation effect in the radial direction, thereby causing the inner and outer tooth edges to be different from each other. The gap-filling components form a good fit without gaps; and the axial compensation disc of the gap-filling component is used to provide a good sealing effect of the axial gap, so that the inner-rotating gear is pumped inside the leakage phenomenon Minimized.

However, in practice, although the conventional internal gear pump has a good sealing effect, the active gap filler component of the internal rotation gear pump often enters the pressure chamber due to the high pressure fluid, and the cavity Excessive pressure causes the interstitial positive and interstitial of the active gap filler component The resistance of the sub-pieces to the external gears and the internal gears is too large, which causes the current of the drive motor to rise sharply, the temperature of the hydraulic oil to rise, and the internal gears and external gears to increase the wear due to excessive resistance. The movable gap-filling component can be opened under a predetermined fluid pressure and respectively clamped against the inner and outer tooth edges, and if the inner-rotating gear pump is in the active state, the electric energy loss will be increased. Overheating occurs, excessive wear causes wear and tear of the oil pump components and shortens the service life of the oil pump.

In view of the foregoing, the internal rotary gear pump and its movable gap-filling assembly provided by the prior art have considerable room for improvement.

In view of the foregoing, the purpose of the present invention is to provide a gap-filling assembly suitable for assembly in an internal rotary gear pump, and the gap-filling assembly has the pressure-retaining performance and reliability of the integral member of the internal-rotating gear pump. Sexuality and stability, thereby improving the current swell of the drive motor, increasing the temperature of the hydraulic oil, and increasing the wear of the internal gear and the external gear, and improving the overall efficiency of the pressure compensation of the internal rotary gear pumping Its service life.

To achieve the foregoing objective, the present invention provides a gap filler assembly comprising: a gap-filling positive film having a top surface, a first axial end, and a first tip; the interstitial positive film is curved and The thickness gradually decreases from the first axial end toward the first tip; the first axial end of the interstitial positive film has a first abutting surface; the interstitial positive film has at least one pressure guiding hole The interstitial positive film is penetrated from the top surface of the interstitial positive film toward the body.

a gap-filling sub-sheet is disposed on one side of the interstitial positive film, the interstitial sub-sheet has a bottom surface, a second axial end and a second tip; the bottom surface of the interstitial sub-correspond corresponds to The same side of the top surface of the interstitial positive film; and the interstitial sub-sheet is curved corresponding to the interstitial positive film and has a thickness gradually decreasing from the second axial end toward the second tip; Gap subgraph The two-axis end has a second abutment surface.

a supporting shaft having at least one abutting surface, and the first abutting surface of the interstitial positive film and the second abutting surface of the interstitial sub-sheet are fast against the at least one abutting surface of the supporting shaft; The interstitial positive film is formed into a pressure chamber by being assembled with the interstitial sub-sheet.

a pressure maintaining bar is disposed between the top surface of the interstitial positive film and the bottom surface of the interstitial sub-sheet, and the at least one pressure guiding hole of the interstitial positive film is disposed first between the interstitial positive film Between the tip and the pressure bar.

Wherein, the pressure holding bar is configured to block a high pressure fluid between the components of the interstitial positive film and the interstitial sub-sheet, and the at least one pressure guiding hole of the interstitial positive film The fluid of the high pressure in the pressure chamber is drained, so that a certain pressure between the interstitial positive film and the interstitial sub-sheet can be maintained to expand the interstitial positive film and the interstitial sub-sheet, and pass through the at least one guide. The pressure hole discharges the excess pressure, thereby improving the current surge of the drive motor, the temperature rise of the hydraulic oil, and the increase of the mechanism wear of the internal gear and the external gear, and the pumping of the internal rotation gear can be improved. The overall efficiency of pressure compensation and its service life.

Preferably, the interstitial positive film further has a first receiving groove formed by recessing a top surface of the interstitial positive film toward the body, and the first receiving groove is connected to the pressure chamber.

Preferably, the pressure guiding hole of the interstitial positive film is disposed in a range of a region between the first receiving groove and the pressure maintaining bar.

Preferably, the area defined by the distance from the first tip of the interstitial positive film to the first abutment surface is a first area sum; the system is defined from the first tip of the interstitial positive film to the The area formed by the distance of the pressure bar is the second area sum; and the sum of the aperture areas of the pressure guiding hole is defined as the third area sum; wherein the third area and the system occupy the percentage of the first area and the middle Between 0.01% and 2.0%, and the third area and the system occupying the second area and the percentage between 0.01% and 3.0%.

10‧‧‧Internal gear pumping

20‧‧‧ pump body

21‧‧‧ body

212‧‧‧ chamber

214‧‧‧ inlet port

216‧‧‧ oil outlet

22‧‧‧ front pump cover

23‧‧‧ front cover

24‧‧‧ rear pump cover

25‧‧‧ Back cover

26‧‧‧ Pressure plate

27‧‧‧ bushing

28‧‧‧ bolts

30‧‧‧ Gear Set

32‧‧‧ internal tooth ring

322‧‧‧Inlet

34‧‧‧ external gear shaft

342‧‧‧ teeth

40, 40A‧‧‧filling components

41, 41A‧‧‧Interstitial film

410, 410A‧‧‧ top

411‧‧‧The first axis

412‧‧‧ first tip

413‧‧‧First abutment

414‧‧‧Axis hole

415, 415A‧‧‧ first accommodating slot

416, 416A‧‧‧ second accommodating slot

417, 417A‧‧‧ third accommodating slot

418, 418A‧‧ ‧ pressure-conducting holes

42‧‧‧Interstitial film

420‧‧‧ bottom

421‧‧‧Second axis

422‧‧‧second tip

423‧‧‧second abutment

43‧‧‧Support shaft

431‧‧‧Abutment

433‧‧‧Support surface

44‧‧‧pressure chamber

45‧‧‧First spring piece

46, 46A‧‧‧ pressure bar

461‧‧‧Second spring piece

47, 47A‧‧‧ third spring piece

Figure 1 is a perspective view showing the structure of the first preferred embodiment of the present invention.

Figure 2 is a perspective exploded view showing the structure of the first preferred embodiment of the present invention.

Figure 3 is a perspective view showing the structure of the components of the first preferred embodiment of the present invention.

Figure 4 is a schematic exploded view of the component structure in Figure 3.

Figure 5 is a cross-sectional view showing the structure of the first preferred embodiment of the present invention.

Figure 6 is a schematic cross-sectional view showing the structure of the first preferred embodiment of the present invention.

Fig. 7 is a schematic cross-sectional view taken along the line 7-7 of the cut line in Fig. 3.

Figure 8 is a cross-sectional view showing the components of the second preferred embodiment of the present invention.

In the following, the structural features of the present invention and their intended effects will be described in detail by way of the examples and the accompanying drawings. First, in the embodiments and drawings, the same reference numerals are used to indicate the same. Or elements, components, objects, structures, systems, structures, devices, processes, methods, or steps that are similar.

Please refer to FIGS. 1 to 7 as an internal rotary gear pump 10, which includes a pump body 20, a gear set 30, and a gap filler assembly 40 provided by the present invention.

The pump body 20 includes a body 21, a front pump cover 22, a front cover 23, a rear pump cover 24 and a rear cover 25; and the body 21 has a body for storing fluid (for example, hydraulic oil). a chamber 212, an oil inlet 214 communicating with the chamber 212, and an oil outlet 216 communicating with the chamber 212, and the oil inlet 214 and the oil outlet 216 form a joint between the oil inlet 214 and the oil outlet 216. Predetermined angle An angle, wherein the angle is greater than 0 degrees and less than 180 degrees. The body 21 is respectively provided with a pressure plate 26 between the front pump cover 22 and the rear pump cover 24; and between the front cover 23 and the front pump cover 22 and the rear cover 25 and the rear A bushing 27 is separately provided between the pump cover 24. In this embodiment, the oil inlet 214 and the oil outlet 216 form an angle of nearly 90 degrees. When assembled, the body 21, the front pump cover 22, the front cover 23, The rear pump cover 24 and the rear cover 25 are secured by four bolts 28 for locking.

The gear set 30 has an inner ring 32 and an outer pin 34. The inner ring 32 is rotatably disposed in the chamber 212 of the pump body 20 for clamping the pressure plates 26 The inner ring gear 32 has a plurality of air guiding holes 322. The outer toothed shaft 34 is rotatably disposed in the chamber 212 of the pump body 20 and is disposed in the same axial direction. a bushing 27, the front end of the external pinion 34 protrudes beyond the front cover 23 of the pump body 20 for connecting an external driving source (not shown, for example, a motor); and the external pinion 34 is A toothed portion 342 is provided for engaging the inner ring gear 32. Therefore, when the external pinion 34 is rotated by the driving source, the external pinion 34 drives the internal tooth by the meshing relationship between the tooth portion 342 and the inner ring gear 32. The ring 32 is rotated.

Referring to FIGS. 3 and 4 again, the gap filler assembly 40 includes a gap-filling positive film 41, a caulking sub-sheet 42, a support shaft 43, a first spring piece 45, a pressure holding bar 46, and a third. a spring piece 47; the interstitial positive film 41 is consistently superposed on the interstitial sub-sheet 42 and simultaneously disposed in the inner ring gear 32; and the interstitial positive piece 41 and the interstitial sub-piece 42 are A pressure chamber 44 is formed that is connectable to the high pressure end.

The interstitial positive film 41 has a first axial end 411 and a first tip 412; the interstitial positive 41 is curved and has an overall thickness from the first axial end 411 toward the first tip 412. The direction of the first axial end 411 of the interstitial positive film 41 has a first abutting surface 413 and a shaft hole 414. When assembled, the first axial end 411 of the interstitial positive film 41 is borrowed. After the shaft hole 414 is inserted through a bolt (not shown), the pressure plate 26 is pivotally connected to the pump body 20; the interstitial positive film 41 has a top surface 410 from the The top surface 410 of the interstitial positive film 41 is recessed in the direction of the body to form a first accommodating groove 415, a second accommodating groove 416 and a third accommodating groove which are respectively connected to the pressure chamber 44. 417, the first accommodating groove 415 is closer to the first tip end 412, the third accommodating groove 417 is closer to the first axial end 411, and the second accommodating groove 416 is Between the first accommodating groove 415 and the third accommodating groove 417, and closer to the position of the third accommodating groove 417; and the interstitial positive film 41 has at least one pressure guiding hole 418 Passing through the interstitial positive film 41 from the top surface 410 toward the body portion to dilate the excessive pressure in the pressure chamber 44, so that the interstitial positive film 41 and the interstitial sub-sheet 42 can Maintaining a certain pressure to open the interstitial positive piece 41 and the interstitial sub-sheet 42 and discharge excess pressure through the pressure guiding hole 418, thereby improving the current of the driving motor , Hydraulic oil temperature rises and the internal gear, the external gear mechanism thereby producing increased wear phenomena, and can enhance the internal pressure compensating rotary gear pump and the total efficiency of the service life.

The interstitial sub-sheet 42 has a second axial end 421 and a second tip 422; the interstitial sub-sheet 42 has an arc corresponding to the interstitial positive film 41 and its overall thickness is from the second The axial end 421 gradually decreases toward the second tip 422; and the second axial end 421 of the interstitial sub-plate 42 has a second abutting surface 423 corresponding to the first axis of the interstitial positive film 41 The first abutting surface 413 of the cardiac end 411; the interstitial sub-sheet 42 has a bottom surface 420 corresponding to the same side of the top surface 410 of the interstitial positive film 41.

The support shaft 43 is fixed to the front pump cover 22 and the rear pump cover 24 of the pump body 20 after the two ends thereof are respectively inserted through the pressure plates 26; the body of the support shaft 43 has At least one abutting surface 431 and a supporting surface 433 adjacent to the at least one abutting surface 431; the supporting surface 433 abuts against the tooth portion 342 of the pinion 34 outside the pump body 20, such that the supporting shaft 43 and the external tooth shaft 34 do not interfere with each other and maintain a good sealing effect; The first abutting surface 413 of the interstitial positive film 41 and the second abutting surface 423 of the interstitial sub-sheet 42 are fastened to the at least one abutting surface 431 of the supporting shaft 43; likewise, the interstitial positive film 41 The three pieces of the interstitial sub-sheet 42 and the support shaft 43 do not interfere with each other after assembly, and can maintain a good rotation state. In this embodiment, the support shaft 43 has two abutting surfaces 431 , and the supporting surface 433 is adjacent to the abutting surface 431 for enabling the supporting shaft 43 not to be adjacent to the pump body 20 . The tooth portion 342 of the outer pinion 34 forms an interference phenomenon, that is, the direction in which the interstitial positive film 41, the interstitial sub-sheet 42 and the support shaft 43 are changed in assembly direction.

The first spring piece 45 is disposed in the first receiving groove 415 of the interstitial positive film 41 and abuts against the bottom surface 420 of the interstitial sub-sheet 42; wherein the pressure holding bar 46 is disposed in the filling The second receiving groove 416 of the gap positive film 41 is further provided with a second spring piece 461 and is pressed under the pressure holding bar 46; the third spring piece 47 is disposed on the third of the interstitial positive film 41. In the accommodating groove 417, the pressure retaining bar 46 and the third spring piece 47 respectively abut against the bottom surface 420 of the shimming sub-plate 42, and the third spring piece 47 is used to improve the shimming positive film. The end support force of the member of both the interstitial sheet 42 and the interstitial sheet 42.

In the present embodiment, please refer to FIGS. 3, 4, 6 and 7 again, and the distance from the first tip 412 of the interstitial positive film 41 to the first abutment surface 413 is defined as L1. And the area formed by it is defined as the first area and A1, and the distance from the first tip 412 of the interstitial positive film 41 to the section of the pressure holding bar 46 is L2, and the area formed by it is defined as The second area and the A2; and the interstitial positive film 41 is provided with six of the pressure guiding holes 418 adjacent to the first tip 412, and the pressure guiding holes 418 may be an array arrangement or an interlaced mesh. The arrangement is combined and further defines that the sum of the aperture areas of the pressure guiding holes 418 is the third area and A3. Wherein the third area and the A3 system occupy the first area and the percentage in A1 is between 0.01% and 2.0%, and the third area and the A3 line occupy the second area and the percentage in A2 is between 0.015 Between % and 3.0%.

In the present embodiment, please refer to FIGS. 2, 5 and 6 again. When the external pinion 34 of the gear set 30 of the internal rotary gear pump 10 is driven by an external drive source, the drive is further driven. The inner ring gear 32 is synchronously rotated. At this time, the fluid (for example, hydraulic oil) is introduced from the oil inlet 214 of the pump body 20, and the flow guiding hole 322 of the inner ring gear 32 is filled in the The gap between the inner ring gear 32 and the outer pinion 34; then, the fluid will be guided to the gap filler assembly 40 due to the synchronous rotation of the inner ring gear 32 and the outer pinion 34. The position of the first tip 412 of the interstitial positive film 41 and the second tip 422 of the interstitial sub-sheet 42 are located; then, the fluid is gradually reduced with the space of the interdental space, thereby generating a high voltage and The phenomenon of pressurization is then squeezed through the oil outlet 216 of the pump body 20 to discharge the fluid having a high pressure and a pressurized phenomenon to the outside.

The outstanding technical features and the expected effects of the internal rotary gear pump 10 provided in this embodiment are compared with the prior art: When the pressure of the high pressure fluid acts to form a predetermined angle between the interstitial positive film 41 and the interstitial sub-sheet 42, the pressure chamber 44 is formed, and the pressure-preserving rod 46 is immediately blocked by the high-pressure fluid. In the pressure chamber 44, in order to improve the pressure in the pressure chamber 44, the interstitial positive film 41 of the interstitial assembly 40, the interstitial sub-sheet 42 and the inner ring gear 32 of the gear set 30, the external teeth are improved. The resistance of the contact between the shafts 34 is too large, so that the current of the drive motor rises sharply, the temperature of the hydraulic oil rises, and the inner ring gear 32 of the gear set 30 and the outer pinion 34 thus increase the wear of the mechanism; Therefore, in this embodiment, the high pressure fluid in the pressure chamber 44 can discharge a part of the high pressure fluid through the designed pressure guiding hole 418, and the pressure chamber 44 can be retained by the calculated area difference. Appropriate tension is used to maintain the pressure holding tension of the interstitial positive film 41 and the caulking sub-sheet 42, and excess pressure can be discharged from the pressure chamber 44 by the designed pressure guiding hole 418, thereby reducing frictional resistance and reducing friction. Resistance and achieve improved power to drive the motor The sudden increase of the flow, the increase of the temperature of the hydraulic oil, and the increase of the wear of the internal gear and the external gear, and the The overall efficiency of the pressure compensation of the internal rotary gear pump and its service life. Therefore, once the pressure of the high pressure fluid received between the interstitial positive film 41 and the interstitial sub-sheet 42 is gradually released, the interstitial positive film 41 and the interstitial sub-sheet 42 will be brought into contact with each other. Gradually returning to the initial assembled state, and repeating, the phenomenon that the current of the driving motor generated by the internal rotating gear pump 10 is increased, the temperature of the hydraulic oil rises, and the gear set 30 is reduced. The mechanism of the inner ring gear 32 and the outer pinion 34 is even more expensive, and the overall efficiency, volumetric efficiency and service life of the pressure compensation of the inner gear pump 10 are also significantly improved.

The above is a description of the technical features of the first preferred embodiment of the present invention and its effects, and thereafter, another alternative for the internal rotary gear pump provided by the second preferred embodiment of the present invention will be further explained. Technical features of the gap assembly.

Please refer to FIG. 8 for a gap filler component 40A provided by the present invention. The main structure is the same as the previous embodiment, and the difference is that: The interstitial positive film 41A has at least one pressure guiding hole 418A extending from the top surface 410A in the direction of the body portion to the interstitial positive film 41A, and the at least one pressure guiding hole 418A is disposed between the first receiving groove 415A. And a region between the second receiving groove 416A; preferably, the at least one pressure guiding hole 418A is a diagonal perforation. Similarly, the pressure-retaining rod 46A and the third spring piece 47A are respectively disposed in the second accommodating groove 416A and the third accommodating groove 417A of the shimming positive film 41A.

In the present embodiment, the interstitial positive film 41A has six such pressure guiding holes 418A, and is disposed between the first accommodating groove 415A and the second accommodating groove 416A of the shimming positive film 41A. The area between the two, and the pressure guiding holes 418A are arranged adjacent to each other.

Finally, it must be stated again that those having ordinary knowledge in the technical field of the present invention should be able to clearly understand that the detailed description and the examples listed in the present application are only suitable for explaining the structure, method, process, etc. of the present invention. The intended effect, not the scope of the patent application scope, other equivalent elements, components, objects, structures, devices, Alternatives or changes to the method or process are also covered by the scope of the patent application in this case.

41‧‧‧Interstitial film

415‧‧‧First accommodating slot

416‧‧‧Second accommodating slot

417‧‧‧The third accommodating slot

418‧‧‧Guide pressure hole

42‧‧‧Interstitial film

43‧‧‧Support shaft

431‧‧‧Abutment

433‧‧‧Support surface

44‧‧‧pressure chamber

46‧‧‧ Pressure bar

461‧‧‧Second spring piece

Claims (10)

An interstitial assembly comprising: a gap-filling positive film having a top surface, a first axial end, and a first tip; the interstitial positive sheet being curved and having a thickness from the first axial end Gradually decreasing toward the first tip; the first axial end of the interstitial positive film has a first abutting surface; the interstitial positive film has at least one guiding hole from the top surface of the interstitial positive film The direction of the body extends through the interstitial positive film; a gap-filling sub-sheet is disposed on one side of the interstitial positive film, the interstitial sub-sheet having a bottom surface, a second axial end and a second tip The underside of the interstitial sub-sheet corresponds to the same side of the top surface of the interstitial positive film; and the interstitial sub-sheet has an arc corresponding to the interstitial positive film and the thickness thereof is from the second axial end The direction of the second tip is gradually reduced; the second axial end of the interstitial sub-sheet has a second abutment surface; a support shaft has at least one abutment surface, and the first of the interstitial positives a second abutting surface of the caulking sub-piece is fast against the at least one abutting surface of the supporting shaft; and the interstitial positive film is The gap sub-sheet is assembled to form a pressure chamber; and a pressure-preserving rod is disposed between the top surface of the interstitial positive sheet and the bottom surface of the interstitial sub-sheet, and the at least one guide of the interstitial positive sheet The pressure hole is disposed between the first tip of the interstitial positive film and the pressure holding bar; wherein the pressure maintaining bar is configured to block the component through the gap filler positive film and the gap filler film a high-pressure fluid interposed between the pressure chamber and the at least one pressure-conducting hole of the interstitial positive film to divert excess high-pressure fluid in the pressure chamber, such that the interstitial positive film and the interstitial sub-sheet are Gradually return to the initial assembled state. The gap-filling assembly of claim 1, wherein the interstitial positive film further has a first receiving groove formed by recessing a top surface of the interstitial positive film toward the body; The first receiving groove is connected to the pressure chamber. The gap-filling assembly of claim 2, further comprising a first spring piece disposed in the first receiving groove of the interstitial positive film. The gap-filling assembly of claim 3, wherein the pressure-guiding hole of the interstitial positive film is disposed in a region between the first receiving groove and the pressure-retaining rod. The gap-filling assembly of claim 2, wherein the pressure-guiding aperture of the interstitial positive film is disposed in a region between the first accommodating groove and the pressure-holding bar. The gap-filling assembly according to any one of claims 1 to 5, wherein the interstitial positive film further has a second receiving groove recessed from a top surface of the interstitial positive film toward the body. The second accommodating groove is connected to the pressure chamber, and the pressure maintaining rod is disposed in the second accommodating groove. The gap-filling assembly of claim 6, further comprising a third spring piece, wherein the interstitial positive piece has a third receiving groove from the top surface of the interstitial positive piece toward the body The third accommodating groove is connected to the pressure chamber, and the third spring piece is disposed in the third accommodating groove. The gap-filling assembly according to any one of claims 1 to 5, wherein the area defined by the distance from the first tip of the interstitial positive sheet to the first abutment surface is the first The sum of the areas further defines a total area of the apertures of the pressure guiding holes to be a third area sum, and the third area and the percentage of the first area and the ratio of the first area are between 0.01% and 2.0%. The gap-filling assembly of claim 8, wherein the area defined by the distance from the first tip of the interstitial positive sheet to the pressure-retaining rod is a second area sum, and the third area The occupies occupy between 0.015% and 3.0% of the second area and the percentage. The gap-filling assembly according to any one of claims 1 to 5, wherein the area defined by the distance from the first tip of the interstitial positive sheet to the pressure-retaining rod is a second area and Further, the sum of the aperture areas of the pressure guiding holes is defined as a third area sum, and the third area and the percentage of the second area and the line occupying the second area are between 0.015% and 3.0%.