Integrated gear pump

Abstract

An integrated gear pump comprises a shell, threaded through holes are formed in the front side and the rear side of the shell respectively, two communicated through holes are formed in the shell, the through holes are communicated with the threaded through holes, a rear cover is arranged on one sides of the through holes in a matched mode, a front cover is arranged on the other sides of the through holes in a matched mode, and a cylindrical cavity coaxial with one through hole is formed in the front cover. An opening is formed in one side of the cylindrical cavity, a sealing cover is arranged on the cylindrical cavity in a matched mode, a safety valve mechanism is arranged on the rear cover, a driving gear shaft and a driven gear shaft are sequentially arranged in the through hole, and the driving gear shaft extends out of the cylindrical cavity. The spacer bush is simple in structure and ingenious in conception, the spacer bush base bodies in the spacer bush are independent, the two spacer bush base bodies are matched in use, compared with a spacer bush of an integrated structure, the spacer bush base bodies are easier to machine, more convenient to assemble and capable of being independently disassembled and replaced, and the maintenance time and cost are effectively shortened.

Description

TECHNICAL FIELD

[0001] The utility model belongs to gear pump field, concretely is an integrated gear pump. BACKGROUND

[0002] Gear pump is the rotary pump that the working volume variation and removal formed between pump cylinder and meshing gear are relied on to transport liquid or make it pressurized, gear pump is mainly composed of two gears, pump body and front and back cover two closed spaces, the one end close to liquid suction chamber is inhaled, and the chamber is connected with upstream equipment through the suction pipe, the one end close to liquid discharge chamber is discharged, and the chamber is connected with downstream equipment through the discharge pipe, the chamber is separated from each other through the meshing line of gear between the suction chamber and the discharge chamber, the driving gear and the driven gear rotate ceaselessly, when the meshing tooth on one side of the suction chamber gradually separates, the volume of the suction chamber increases, the pressure decreases, the liquid in the suction pipe is sucked into the pump, the suction liquid is pushed to the discharge chamber from the gear through two paths of the gear slot on one side of the driving gear and one side of the driven gear, some gear pumps need to use spacer components, but the existing spacer is generally of integral structure, in the case of limited installation space or complex equipment structure, the installation process may be more difficult, more operating space and professional tools are needed, the installation time may be longer, it is not easy to maintain and replace, the workload is large, and the spacer of integral structure is more inconvenient to process, poor adaptability, therefore we design an integrated gear pump. SUMMARY

[0003] The utility model provides a kind of integrated gear pump to solve the defects in prior art.

[0004] The utility model is implemented by the following technical solutions:

[0005] An integrated gear pump, including shell, the front and back sides of shell are respectively provided with threaded through hole, two communicating through holes are formed in the shell, the through hole is communicated with the threaded through hole, a rear cover is arranged on one side of the through hole, and a front cover is arranged on the other side of the through hole, a cylindrical cavity coaxial with one of the through holes is arranged on the front cover, one side of the cylindrical cavity is open, and a sealing cover is arranged on the other side of the cylindrical cavity, a safety valve mechanism is arranged on the rear cover, a driving gear shaft and a driven gear shaft are arranged in the through hole in sequence, the driving gear shaft extends to the outside of the cylindrical cavity, a mechanical seal is arranged between the driving gear shaft and the sealing cover, gears meshing with each other are arranged on the driving gear shaft and the driven gear shaft, spacer bodies are arranged on both sides of the gears, the driving gear shaft and the driven gear shaft are rotatably connected to the corresponding spacer bodies, and oil grooves and unloading grooves are formed in the spacer bodies.

[0006] The integrated gear pump described above is provided with a mounting leg fixedly connected to the front cover, and a plurality of mounting holes are formed in the mounting leg.

[0007] An integrated gear pump as described above, a plurality of positioning pin holes are formed on the shell, a positioning pin mounting hole corresponding to the positioning pin hole is formed on the front cover, and threaded holes are formed on both sides of the shell, and connecting holes are respectively arranged on the front cover and the rear cover.

[0008] An integrated gear pump as described above, a plurality of positioning pin holes are formed on the shell, a positioning pin mounting hole corresponding to the positioning pin hole is formed on the front cover, and threaded holes are formed on both sides of the shell, and connecting holes are respectively arranged on the front cover and the rear cover.

[0009] An integrated gear pump as described above, the safety valve mechanism comprises a safety valve body, the safety valve body is cylindrical, and a spring is arranged in the safety valve body, a flow discharge groove is formed on the rear cover, the flow discharge groove is communicated with two threaded holes, the safety valve body is slidably arranged in the flow discharge groove, one side of the flow discharge groove is communicated with the outside, and a sealing plug is threadedly and tightly arranged in the flow discharge groove, under the action of the spring, the safety valve body seals the flow discharge groove, and a sealing gasket is arranged between the sealing plug and the rear cover.

[0010] An integrated gear pump as described above, the mechanical seal comprises an O-shaped ring, the O-shaped ring is sleeved on the sealing cover, an elastic stop ring is abuttingly arranged in the cylindrical cavity, a mechanical seal flat gasket is arranged on one side of the elastic stop ring, a mechanical seal concave gasket is arranged on one side of the mechanical seal flat gasket, a mechanical seal static ring is abuttingly arranged in the sealing cover, a mechanical seal dynamic ring is arranged on one side of the mechanical seal static ring, and a second spring is arranged between the mechanical seal dynamic ring and the mechanical seal concave gasket.

[0011] The utility model discloses a simple structure, and the device is ingenious, and the spacer sleeve base body is independent, and two are matched when using, compared with integral spacer sleeve, the spacer sleeve base body is simpler to process, and is more convenient to assemble, can be separately disassembled and replaced, effectively shortens maintenance time and cost. BRIEF DESCRIPTION OF DRAWINGS

[0012] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description, and obviously, the drawings in the following description are some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained without creative labor under the premise of the drawings.

[0013] Figure 1is a structural schematic view of the utility model; Figure 2 is Figure 1 a top view of the utility model; Figure 3 is Figure 2 a sectional view along C-C line in the utility model; Figure 4 is Figure 1 a sectional view along D-D line in the utility model; Figure 5 is an oblique view of the device; Figure 6 is a schematic view of the shell; Figure 7 is a schematic view of the front cover; Figure 8 is a schematic view of the rear cover; Figure 9 is a schematic view of the spacer base body.

[0014] Reference signs: 1, shell, 2, threaded through hole, 3, through hole, 4, rear cover, 5, front cover, 6, cylindrical cavity, 7, driving gear shaft, 8, driven gear shaft, 9, gear, 11, spacer base body, 12, sealing cover, 13, oil groove, 14, unloading groove, 20, mounting leg, 21, mounting hole, 30, positioning pin hole, 31, positioning pin mounting hole, 32, threaded hole, 33, connecting hole, 40, special-shaped groove, 41, sealing washer, 50, safety valve body, 51, spring, 52, leakage groove, 53, sealing plug, 54, plug sealing pad, 60, O-ring, 61, elastic check ring, 62, mechanical sealing flat washer, 63, mechanical sealing concave washer, 64, mechanical sealing static ring, 65, second spring, 66, mechanical sealing dynamic ring. DETAILED DESCRIPTION

[0015] In order to make the purpose, technical scheme and advantages of the utility model embodiment more clear, the technical scheme in the utility model embodiment will be described clearly and completely below in combination with the drawings in the utility model embodiment, obviously, the described embodiment is a part of the embodiment of the utility model, rather than all the embodiments. Based on the embodiment in the utility model, all other embodiments obtained by the person skilled in the art without creative labor are within the protection scope of the utility model.

[0016] An integrated gear pump, such as Figure 1 , 2, 3, 4, 5, 6, 7, 8, 9, including the shell 1, the front and rear of the shell 1 are provided with threaded holes 2, the shell 1 is provided with two communicating holes 3, the hole 3 is communicated with the threaded hole 2, the hole 3 is provided with the same rear cover 4 on one side, the hole 3 is provided with the same front cover 5 on the other side, the rear cover 4 and the front cover 5 are detachably mounted on the shell 1, the front cover 5 is provided with a cylindrical cavity 6 coaxial with one of the holes 3, the side of the cylindrical cavity 6 is provided with a sealing cover 12, the sealing cover 12 is mounted on the side wall of the cylindrical cavity 6 through the reserved hole and the bolt, the rear cover 4 is provided with a safety valve mechanism, the hole 3 is provided with a driving gear shaft 7 and a driven gear shaft 8 in sequence, the driving gear shaft 7 extends to the outside of the cylindrical cavity 6 and passes through the center hole of the sealing cover 12, the driving gear shaft 7 and the sealing cover 12 are provided with a mechanical seal, the driving gear shaft 7 and the driven gear shaft 8 are provided with gears 9 engaged with each other respectively, the two sides of the gear 9 are provided with spacer bases 11 respectively, the driving gear shaft 7 and the driven gear shaft 8 are rotatably connected to the corresponding spacer base 11 respectively, the driving gear shaft 7 and the driven gear shaft 8 are connected to the corresponding spacer base 11 through the needle bearing, the spacer base 11 on the same side of the gear 9 is symmetrically distributed upward and downward, the oil groove 13 and the unloading groove 14 are respectively provided on the spacer base 11. The utility model discloses simple structure, clever design, the spacer base 11 in the device is independent, and two are matched when using, compared with the spacer of integral structure, the spacer base 2 is more simple to process, and the assembly is more convenient, and can be separately disassembled and replaced, so that the maintenance time and cost are effectively shortened. When using the device, the rear cover 4, the front cover 5, the driving gear shaft 7, the driven gear shaft 8 and the spacer base 11 are assembled into a gear pump, and finally the sealing cover 12 is installed, when the spacer base 11 is installed, due to the independence, the size is small, compared with the integral spacer with complex shape and larger volume, the spacer base 11 is more simple to install, and the spacer base 11 is more easily adjusted in the installation process, when the oil liquid is transported, the oil enters the oil groove 13, the needle bearing is lubricated and cooled, and the unloading groove 14 on the spacer base 11 can reduce the vibration and noise of the gear pump.

[0017] Specifically, as shown in the figure, the front cover 5 is fixedly connected with the mounting leg 20, the front cover 5 and the mounting leg 20 are an integral structure, and a plurality of mounting holes 21 are formed in the mounting leg 20. The front cover 5 is integrated with the mounting leg 20, so that the device is more convenient to install and maintain.

[0018] Specifically, as shown in the drawings, a plurality of positioning pin holes 30 are formed on the shell 1, a positioning pin mounting hole 31 corresponding to the positioning pin hole 30 is formed on the front cover 5, and threaded holes 32 are formed on both sides of the shell 1. The front cover 5 or the rear cover 4 can be installed on the shell 1 by inserting a bolt through the connecting hole 33 and screwing it in the threaded hole 32. Before installing the bolt, the positioning pin is inserted into the positioning pin mounting hole 31 on the front cover 5 and the positioning pin hole 30 on the shell 1, so that the installation accuracy is higher.

[0019] Further, as shown in the drawings, the front cover 5 and the rear cover 4 of the embodiment are respectively provided with a special-shaped groove 40, and a sealing washer 41 is respectively arranged in the special-shaped groove 40. The sealing washer 41 can increase the sealing between the shell 1 and the front cover 5 or the rear cover 4.

[0020] Further, as shown in the drawings, the safety valve mechanism of the embodiment includes a safety valve body 50, which is cylindrical and has a spring 51 inside. One end of the spring 51 abuts against the inner wall of the safety valve body 50. A flow relief groove 52 is formed on the rear cover 4, and the flow relief groove 52 is connected to the two threaded holes 2. The safety valve body 50 is slidingly installed in the flow relief groove 52. One side of the flow relief groove 52 is connected to the outside, and a sealing plug 53 is threadedly and sealingly installed. The sealing plug 53 is also cylindrical. The other end of the spring 51 abuts against the inner wall of the sealing plug 53. Under the action of the spring 51, the safety valve body 50 blocks the flow relief groove 52. A step is formed on the inner wall of the flow relief groove 52 to limit the safety valve body 50. A plug sealing washer 54 is arranged between the sealing plug 53 and the rear cover 4. When the pressure on one side of the outlet of the gear pump reaches a certain value, the high-pressure liquid at the outlet will push the safety valve body 50 to slide along the flow relief groove 52 until the safety valve body 50 no longer blocks the flow relief groove 52. The high-pressure liquid at the outlet will then flow from the flow relief groove 52 to the side of the inlet of the gear pump, ensuring the safety of the pump operation. When the pressure returns to normal, the safety valve body 50 will block the flow relief groove 52 again under the action of the spring 51. The plug sealing washer 54 can increase the sealing between the sealing plug 53 and the rear cover 4 to prevent liquid leakage. After the sealing plug 53 is unscrewed from the rear cover 4, the spring 51 and the safety valve body 50 can be replaced or repaired.

[0021] Further, as shown in the figure, the mechanical seal of the embodiment comprises an O-ring 60, the O-ring 60 is sleeved on the sealing cover 12, an elastic baffle 61 is arranged in abutting fit in the cylindrical cavity 6, a mechanical seal flat gasket 62 is arranged on one side of the elastic baffle 61 in abutting fit, a mechanical seal concave gasket 63 is arranged on one side of the mechanical seal flat gasket 62 in abutting fit, a mechanical seal static ring 64 is arranged in abutting fit in the sealing cover 12, a mechanical seal dynamic ring 66 is arranged on one side of the mechanical seal static ring 64, and a second spring 65 is arranged between the mechanical seal dynamic ring 66 and the mechanical seal concave gasket 63. Through the mechanical seal, leakage of liquid between the driving gear shaft 7 and the center hole of the sealing cover 12 can be avoided.

[0022] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. An integrated gear pump, comprising a housing (1), two threaded through holes (2) are respectively formed on the front and back sides of the housing (1), two through holes (3) are formed on the housing (1) and are connected to each other, the through holes (3) are communicated with the threaded through holes (2), a same back cover (4) is arranged on one side of the through holes (3), a same front cover (5) is arranged on the other side of the through holes (3), a cylindrical cavity (6) coaxial with one of the through holes (3) is arranged on the front cover (5), one side of the cylindrical cavity (6) is opened and a sealing cover (12) is arranged thereon, a safety valve mechanism is arranged on the back cover (4), a driving gear shaft (7) and a driven gear shaft (8) are sequentially arranged in the through holes (3), the driving gear shaft (7) extends to the outside of the cylindrical cavity (6), a mechanical seal is arranged between the driving gear shaft (7) and the sealing cover (12), gears (9) meshing with each other are respectively arranged on the driving gear shaft (7) and the driven gear shaft (8), characterized in that: Gear (9) both sides are respectively provided with spacer base body (11), driving gear shaft (7) and driven gear shaft (8) are respectively connected to the corresponding spacer base body (11) rotationally, spacer base body (11) is respectively provided with oil groove (13) and unloading groove (14).

2. An integrated gear pump as claimed in claim 1, characterized in that: The front cover (5) is fixedly connected with a mounting leg (20), and a plurality of mounting holes (21) are formed in the mounting leg (20).

3. An integrated gear pump as claimed in claim 1, wherein: A plurality of positioning pin holes (30) are formed in the shell (1), and a plurality of positioning pin mounting holes (31) corresponding to the positioning pin holes (30) are formed in the front cover (5); threaded holes (32) are formed in both sides of the shell (1), and connecting holes (33) are formed in the front cover (5) and the rear cover (4).

4. An integrated gear pump as claimed in claim 3, characterized in that: Respectively, the front cover (5) and the rear cover (4) are provided with a special-shaped groove (40), and a sealing washer (41) is arranged in the special-shaped groove (40).

5. An integrated gear pump as claimed in claim 1, wherein: The safety valve mechanism comprises a safety valve body (50), the safety valve body (50) is cylindrical, and the inside of the safety valve body (50) is provided with a spring (51); a flow discharge groove (52) is formed in the rear cover (4), the flow discharge groove (52) is communicated with two threaded holes (2), the safety valve body (50) is slidably installed in the flow discharge groove (52), one side of the flow discharge groove (52) is communicated with the outside, and a sealing plug (53) is threadedly and tightly installed; under the action of the spring (51), the safety valve body (50) blocks the flow discharge groove (52), and a plug sealing washer (54) is arranged between the sealing plug (53) and the rear cover (4).

6. An integrated gear pump as defined in claim 1, wherein: The mechanical seal comprises an O-shaped ring (60), the O-shaped ring (60) is sleeved on the sealing cover (12), an elastic retainer ring (61) is abuttingly arranged in the cylindrical cavity (6), a mechanical seal flat washer (62) is arranged on one side of the elastic retainer ring (61), a mechanical seal concave washer (63) is arranged on one side of the mechanical seal flat washer (62), a mechanical seal static ring (64) is abuttingly arranged in the sealing cover (12), a mechanical seal dynamic ring (66) is arranged on one side of the mechanical seal static ring (64), and a second spring (65) is arranged between the mechanical seal dynamic ring (66) and the mechanical seal concave washer (63).

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