CN215720811U

CN215720811U - Internal gear pump with double end face mechanical seal

Info

Publication number: CN215720811U
Application number: CN202121893634.6U
Authority: CN
Inventors: 刘武礼
Original assignee: Anhui Papson Pump Co ltd
Current assignee: Anhui Papson Pump Co ltd
Priority date: 2021-08-13
Filing date: 2021-08-13
Publication date: 2022-02-01
Anticipated expiration: 2031-08-13

Abstract

The utility model provides an internal gear pump with double-end-face mechanical seal, relates to the technical field of internal gear pumps, and solves the problems of poor sealing effect and low efficiency of the existing device. An internal gear pump with double end face mechanical seals comprises a shell, a driving shaft and a driven shaft, wherein a first bearing and a second bearing are respectively sleeved on the driving shaft; a pressurizing assembly is arranged between the driving shaft and the driven shaft, a pump cover is arranged at the other end of the shell, a pressure release valve and a crescent-shaped plate are respectively arranged on the pump cover, and the crescent-shaped plate penetrates between the pressurizing assemblies; the sealing assembly is arranged, so that the sealing performance of the device is better; through the setting of pressurization subassembly and crescent moon board, make the device pressurization faster, efficiency is higher.

Description

Internal gear pump with double end face mechanical seal

Technical Field

The utility model belongs to the technical field of internal gear pumps, and particularly relates to an internal gear pump with double end face mechanical seals.

Background

The internal gear pump adopts the gear internal gear principle, the pitch circle of internal and external gear is near one side, the another side is separated by the crescent moon board on the pump cover, main epaxial initiative internal gear drives wherein the external gear syntropy and rotates, gear alternate segregation forms the negative pressure and inhales liquid in import department, the gear constantly imbeds the meshing and exports liquid extrusion in the exit, present internal gear meshing pump mainly comprises driving gear, driven gear, the pump body, pump cover and relief valve etc. after the live time is too long, wearing and tearing can appear usually in its seal assembly, lead to device sealing performance to descend, make the circumstances such as liquid leakage appear in the device.

As in application No.: CN201922304367.3 discloses an internal gear pump, the device is provided with oil storage tank, side plate, oil guide tank and damping tank, the oil storage tank pass through on the side plate oil guide tank and damping tank and the high pressure oil cavity intercommunication for form the dynamic pressure oil film between external gear and side plate, reduce the wearing and tearing of the internal components of the device, prolong the service life of the device, but an internal gear pump similar to the above application still has the following several at present not enough:

one is that the sealing mode of the device is mechanical sealing, so that leakage is easy to occur, high pressure cannot be borne, the quality of the device is reduced, and the sealing effect is poor; moreover, the inner gear of the device has poor penetrating effect, so that the device cannot quickly pressurize and discharge liquid, and the device efficiency is low.

Therefore, in view of the above, research and improvement are made for the existing structure and defects, and an internal gear pump with a double-end-face mechanical seal is provided, so as to achieve the purpose of higher practical value.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problems, the utility model provides an internal gear pump with a double-end-face mechanical seal, which aims to solve the problems of poor sealing effect and low efficiency of the conventional device.

The utility model relates to an internal gear pump with double mechanical seals, which is achieved by the following specific technical means:

an internal gear pump with double end face mechanical seals comprises a shell, a driving shaft and a driven shaft, wherein a first bearing and a second bearing are respectively sleeved on the driving shaft, a bearing sleeve is sleeved on the first bearing, the bearing sleeve penetrates through one end of the shell, the second bearing is positioned on one side of a sealing assembly, and the sealing assembly is sleeved on the driving shaft; the pressurizing assembly is arranged between the driving shaft and the driven shaft, the other end of the shell is provided with a pump cover, the pump cover is provided with a pressure release valve and a crescent-shaped plate respectively, and the crescent-shaped plate penetrates through the pressurizing assembly.

Further, seal assembly is including an installation section of thick bamboo, the installation section of thick bamboo is equipped with a sealed section of thick bamboo and solid fixed ring outward respectively, wear to be equipped with two sets of sealing rings and two sets of compression spring in the sealed section of thick bamboo respectively, one of them is a set of the sealing ring with installation section of thick bamboo side contact, another group the sealing ring with gu fixed ring side contact, gu fixed ring wears to establish in the fixed cover, gu fixed cover set establishes outside the installation section of thick bamboo, it is two sets of compression spring is located two sets of between the sealing ring.

Further, the installation section of thick bamboo overcoat is equipped with the jump ring, the jump ring is located fixed lid one side, the sealing ring with solid fixed ring all overlaps and is equipped with the rubber circle outward, a plurality of keyways 9 have been seted up on the installation section of thick bamboo, be provided with the parallel key on the driving shaft, the parallel key card is established one of them in the keyway 9.

Furthermore, the pressurizing assembly comprises a first gear and a second gear, the first gear is arranged on the driving shaft, a through groove is formed in the first gear, the first gear is meshed with the second gear, the second gear is sleeved outside an idler gear sleeve 9, the idler gear sleeve 9 is sleeved on the driven shaft, and the tail end of the driven shaft penetrates through the pump cover.

Furthermore, an end cover penetrates through the bearing sleeve and is located on one side of the first bearing, a sealing sleeve and a locking cap penetrate through the driving shaft respectively, the sealing sleeve is in contact with one side of the end cover, and the locking cap is in contact with one side of the sealing sleeve.

Furthermore, a sealing ring is arranged at the joint of the pump cover and the shell.

Compared with the prior art, the utility model has the following beneficial effects:

first, rotate as the driving shaft, drive the device during operation, liquid in the pump can be avoided to seal assembly and reveals from the driving shaft, and this seal assembly is double mechanical seal, if the one-level is sealed to be inefficacy, the secondary seal still can be sealed with the device, prevents to reveal, through seal assembly's setting, makes the sealing performance of device better.

The second, the driving shaft rotates, drives the pressurization subassembly and rotates, and pressurization subassembly and crescent moon cooperation extrude liquid to pressurize it, the permeability of pressurization subassembly is better than traditional inner gear, makes in the liquid can be quick gets into the pressurization subassembly more, through the setting of pressurization subassembly and crescent moon, makes the device pressurization faster, and efficiency is higher.

Drawings

Fig. 1 is an overall view of an internal gear pump with double mechanical seals according to the utility model.

Fig. 2 is an exploded view of an internal gear pump with double mechanical seals of the present invention.

Fig. 3 is an enlarged schematic view of the area a in fig. 2.

FIG. 4 is a schematic view of a seal assembly of an internal gear pump with a double mechanical seal according to the present invention.

Fig. 5 is an exploded view of a seal assembly of an internal gear pump with a double mechanical seal according to the present invention.

Fig. 6 is a schematic diagram of a pump cover in an internal gear pump with a double mechanical seal according to the present invention.

In the drawings, the corresponding relationship between the component names and the reference numbers is as follows:

1. a housing; 2. a pressure relief valve; 3. a first bearing; 4. a second bearing; 5. a sealing cylinder; 6. a first gear; 7. a through groove; 8. a seal ring; 9. an idler pulley sleeve; 10. a second gear; 11. a driven shaft; 12. a pump cover; 13. a bearing housing; 14. a drive shaft; 15. an end cap; 16. sealing sleeves; 17. a locking cap; 18. a flat bond; 19. a keyway; 20. mounting the cylinder; 21. a clamp spring; 22. a seal ring; 23. a rubber ring; 24. a compression spring; 25. a fixing ring; 26. a crescent plate; 27. and (5) fixing the cover.

Detailed Description

The embodiments of the present invention will be described in further detail with reference to the drawings and examples. The following examples are intended to illustrate the utility model but are not intended to limit the scope of the utility model.

In the description of the present invention, "a plurality" means two or more unless otherwise specified; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the utility model. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, e.g., as being fixed or detachable or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example (b):

as shown in figures 1 to 6:

the utility model provides an internal gear pump with double end face mechanical seals, which comprises a shell 1, a driving shaft 14 and a driven shaft 11, wherein a first bearing 3 and a second bearing 4 are sleeved on the driving shaft 14, a bearing sleeve 13 is sleeved on the first bearing 3, the second bearing 4 is positioned on one side of the sealing assembly, and the driving shaft 14 is sleeved with the sealing assembly.

Be provided with the pressure components between driving shaft 14 and the driven shaft 11, be provided with relief valve 2 and crescent plate 26 on the pump cover 12 that the 1 other end of casing set up, crescent plate 26 wears to establish between the pressure components, driving shaft 14 rotates, it rotates to drive the pressure components, pressure components and crescent plate 26 cooperation, extrude liquid, thereby pressurize it, pressure components's permeability is better than traditional internal gear, make in the liquid can be quick getting into pressure components more, the effectual work efficiency who improves the device, make and to pressurize more liquid in the unit interval.

Referring to fig. 4 and 5, the sealing assembly includes an installation cylinder 20, a sealing cylinder 5 and a fixing ring 25 are respectively sleeved outside the installation cylinder 20, two sets of sealing rings 22 and two sets of compression springs 24 are arranged in the sealing cylinder 5 in a penetrating manner, one set of sealing rings 22 contacts with the side surface of the installation cylinder 20, the other set of sealing rings 22 contacts with the side surface of the fixing ring 25, the fixing ring 25 is arranged in a fixing cover 27 outside the installation cylinder 20 in a penetrating manner, the two sets of compression springs 24 are located between the two sets of sealing rings 22, under the action of the compression springs 24, the two sets of sealing rings 22 respectively abut against the installation cylinder 20 and the fixing ring 25, and additional sealing liquid is also located between the two sets of sealing rings 22, so as to perform the function of extrusion sealing on the sealing rings 22, if one set of sealing rings 22 fails, the other set of sealing rings 22 can still perform the sealing function, thereby avoiding the leakage of liquid, and improving the sealing effect of the device.

Referring to fig. 2 and 4, a snap spring 21 sleeved outside the mounting cylinder 20 is positioned on one side of the fixing cover 27, rubber rings 23 are sleeved outside the sealing ring 22 and the fixing ring 25, the mounting cylinder 20 is provided with a plurality of key slots 19, a flat key 18 arranged on the driving shaft 14 is clamped in one of the key slots 19, and the snap spring 21 can lock and fix the fixing cover 27, so that the device is more reliable, and the fixing cover 27 is prevented from falling off; the rubber ring 23 can reduce the gaps between the sealing ring 22 and the fixing ring 25 and the sealing cylinder 5, so that the sealing performance of the device is better; the provision of a plurality of keyways 19 allows the mounting barrel 20 to be quickly and easily mounted to the drive shaft 14.

Referring to fig. 2 and 6, the pressurizing assembly includes a first gear 6 and a second gear 10, the first gear 6 is disposed on the driving shaft 14, a through groove 7 is formed in the first gear 6, the first gear 6 is engaged with the second gear 10, the second gear 10 is sleeved outside an idler pulley sleeve 9 on the driven shaft 11, when the driving shaft 14 rotates, the first gear 6 drives the second gear 10 to rotate, liquid enters between the first gear 6 and the second gear 10 through the through groove 7, and when the first gear 6 and the second gear 10 rotate, the liquid is squeezed by the crescent plate 26, so that the liquid is pressurized, the through groove 7 replaces a traditional liquid inlet hole, so that more liquid can enter the device in unit time, and the working efficiency of the device is improved.

Referring to fig. 2, an end cover 15 penetrates through the bearing sleeve 13, the end cover 15 is located on one side of the first bearing 3, a sealing sleeve 16 and a locking cap 17 penetrate through the driving shaft 14, the sealing sleeve 16 is in contact with one side of the end cover 15, the locking cap 17 is in contact with one side of the sealing sleeve 16, the end cover 15 can limit the position of the first bearing 3 to prevent the first bearing from sliding out of the bearing sleeve 13, and the sealing sleeve 16 and the locking cap 17 can lock and seal the end cover 15, so that the device is more stable and reliable.

Referring to fig. 2, a sealing ring 8 is arranged at the joint of the pump cover 12 and the housing 1, and the sealing ring 8 can improve the sealing performance of the device and prevent liquid leakage.

The specific use mode and function of the embodiment are as follows: when the driving shaft 14 rotates to drive the device to work, under the action of the compression spring 24, the two groups of sealing rings 22 respectively abut against the mounting cylinder 20 and the fixing ring 25, and additional sealing liquid is also positioned between the two groups of sealing rings 22 to perform the function of extruding and sealing the sealing rings 22, if one group of sealing rings 22 fails, the other group of sealing rings 22 can still perform the sealing function, and the sealing liquid can improve the sealing performance of the device, so that the sealing performance of the device is better, and the lubricating and cooling functions can also be performed; the driving shaft 14 rotates, the first gear 6 drives the second gear 10 to rotate, liquid enters between the first gear 6 and the second gear 10 through the through groove 7, when the first gear 6 rotates with the second gear 10, the crescent plate 26 is matched to extrude the liquid, so that the liquid is pressurized, the traditional liquid inlet hole is replaced through the through groove 7, the device can enter more liquid in unit time, and the working efficiency of the device is improved.

The embodiments of the present invention have been presented for purposes of illustration and description, and are not intended to be exhaustive or limited to the utility model in the form disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiment was chosen and described in order to best explain the principles of the utility model and the practical application, and to enable others of ordinary skill in the art to understand the utility model for various embodiments with various modifications as are suited to the particular use contemplated.

Claims

1. The utility model provides a take internal gear pump of double mechanical seal which characterized in that: the device comprises a shell (1), a driving shaft (14) and a driven shaft (11), wherein a first bearing (3) and a second bearing (4) are respectively sleeved on the driving shaft (14), a bearing sleeve (13) is sleeved on the first bearing (3), the bearing sleeve (13) penetrates through one end of the shell (1), the second bearing (4) is located on one side of a sealing assembly, and the sealing assembly is sleeved on the driving shaft (14); the pressurizing assembly is arranged between the driving shaft (14) and the driven shaft (11), the other end of the shell (1) is provided with a pump cover (12), the pump cover (12) is provided with a pressure release valve (2) and a crescent plate (26) respectively, and the crescent plate (26) penetrates through the pressurizing assembly.

2. The internal gear pump with double mechanical seals of claim 1, wherein: the sealing assembly comprises an installation barrel (20), wherein the installation barrel (20) is externally provided with a sealing barrel (5) and a fixing ring (25) in a sleeved mode, the sealing barrel (5) is internally provided with two sets of sealing rings (22) and two sets of compression springs (24) in a penetrating mode, one set of the sealing rings (22) is in side contact with the installation barrel (20), the other set of the sealing rings (22) is in side contact with the fixing ring (25), the fixing ring (25) is in penetrating mode in a fixing cover (27), the fixing cover (27) is arranged outside the installation barrel (20) in a sleeved mode, and the compression springs (24) are located between the sealing rings (22).

3. The internal gear pump with double mechanical seals of claim 2, wherein: installation section of thick bamboo (20) overcoat is equipped with jump ring (21), jump ring (21) are located fixed lid (27) one side, sealing ring (22) with gu fixed ring (25) all overlap and be equipped with rubber circle (23) outward, a plurality of keyways (19) have been seted up on installation section of thick bamboo (20), be provided with flat key (18) on driving shaft (14), flat key (18) card is established one of them in keyway (19).

4. The internal gear pump with double mechanical seals of claim 1, wherein: the pressurizing assembly comprises a first gear (6) and a second gear (10), the first gear (6) is arranged on the driving shaft (14), a through groove (7) is formed in the first gear (6), the first gear (6) is meshed with the second gear (10), the second gear (10) is sleeved outside an idler wheel sleeve (9), the idler wheel sleeve (9) is sleeved on the driven shaft (11), and the tail end of the driven shaft (11) penetrates through the pump cover (12).

5. The internal gear pump with double mechanical seals of claim 1, wherein: an end cover (15) penetrates through the bearing sleeve (13), the end cover (15) is located on one side of the first bearing (3), a sealing sleeve (16) and a locking cap (17) penetrate through the driving shaft (14) respectively, the sealing sleeve (16) is in contact with one side of the end cover (15), and the locking cap (17) is in contact with one side of the sealing sleeve (16).

6. The internal gear pump with double mechanical seals of claim 1, wherein: and a sealing ring (8) is arranged at the joint of the pump cover (12) and the shell (1).