CN219452393U

CN219452393U - Gear pump sealing structure

Info

Publication number: CN219452393U
Application number: CN202320564346.9U
Authority: CN
Inventors: 杨俊�; 姚秀锦; 张传富
Original assignee: Geri Hydraulic Technology Changzhou Co ltd
Current assignee: Geri Hydraulic Technology Changzhou Co ltd
Priority date: 2023-03-22
Filing date: 2023-03-22
Publication date: 2023-08-01
Anticipated expiration: 2033-03-22

Abstract

The utility model belongs to the technical field of gear pumps, in particular to a gear pump sealing structure, which comprises a shell and an end cover, wherein the end cover is used for sealing the shell, sealing boxes are arranged on the outer sides of the shell and the end cover, an observation column is arranged on the upper side of each sealing box, an inflating nozzle is connected to the lower side of each sealing box, a pump body gear is rotatably arranged in the shell, a connecting shaft is arranged in the pump body gear in a penetrating way, the sealing boxes are additionally arranged at a shell bearing on the outer side of the shell and a cover bearing on the outer side of the end cover, and the pressure of the outer side end of the shell bearing is higher than the pressure of the inner side end of the shell bearing and the pressure of the inner side of the cover bearing is higher than the pressure of the inner side of the cover bearing through filling gas in a high-pressure cavity in the sealing boxes, so that leakage of liquid in the gear pump outside through the bearing can be effectively prevented, and sealing between a shaft and the bearing can be achieved.

Description

Gear pump sealing structure

Technical Field

The utility model relates to the technical field of gear pumps, in particular to a gear pump sealing structure.

Background

The gear pump is a rotary pump which conveys liquid or pressurizes the liquid by means of the change and movement of working volume formed between a pump cylinder and an engaged gear, and two closed spaces are formed by two gears, a pump body and a cover body. The most important point in the use process of the gear pump is that the sealing performance is good.

The prior art publication No. CN218207792U provides a sealing structure of a gear pump, and the device comprises a housing body, the front swing joint of housing body has a apron body, the below activity of the inside left end of housing body has cup jointed the loose axle, the other end of loose axle extends to the inside of apron body and cup joints with the inside activity of apron body. According to the utility model, the motion plate, the first rubber pad, the second rubber pad and the sealing pad are arranged, and the multi-layer sealing structure of the first rubber pad, the second rubber pad and the sealing pad enables the device to have a better sealing effect relative to a gear pump with one layer of sealing pad, so that the technical problem that the rubber ring is aged in the long-term use process, so that abrasion or breakage is easy to occur and the sealing effect is lost is solved.

Although the device has more beneficial effects, the following problems still exist: the device does not reach sealed effect between axle and bearing, after the relative rotation of production for a long time between axle and bearing, produces the clearance easily, and then the phenomenon of leakage easily takes place, loses sealed effect to be convenient for perceive. In view of this, we propose a gear pump seal arrangement.

Disclosure of Invention

In order to make up the deficiency of the prior art, after the relative rotation is generated for a long time between the shaft and the bearing, a gap is easy to generate, the leakage phenomenon is easy to generate, the sealing effect is lost, the detection is inconvenient, and the sealing effect between the shaft and the bearing is not generated by the conventional device.

The technical scheme adopted for solving the technical problems is as follows: the utility model discloses a gear pump sealing structure, which comprises a shell and an end cover, wherein the end cover is used for sealing the shell, sealing boxes are arranged on the outer sides of the shell and the end cover, an observation column is arranged on the upper side of each sealing box, an inflating nozzle is connected to the lower side of each sealing box, a pump body gear is rotatably arranged in the shell, a connecting shaft is arranged in the pump body gear in a penetrating way, the sealing boxes are additionally arranged at a shell bearing position on the outer side of the shell and a cover bearing position on the outer side of the end cover, and the pressure is increased by filling gas in a high-pressure cavity in the sealing boxes, so that the pressure of the outer side end of the shell bearing is higher than the pressure of the inner side end of the shell bearing, the pressure of the inner side of the cover bearing is higher than the pressure of the inner side of the cover bearing, and accordingly leakage and exudation of liquid in the gear pump to the outer side through the bearing can be effectively prevented, and sealing between the pump and the bearing can be achieved.

Preferably, the end face of the shell body contacted with the end cover is provided with a sealing groove, a sealing gasket is filled in the sealing groove, the sealing gasket is of a U-shaped structure, the shell body is far away from one side contacted with the end cover and is provided with a shell bearing, one end of the connecting shaft penetrates out of the shell bearing and extends to the outer side of the shell body, and the sealing gasket is utilized to improve the sealing effect between the shell body and the end cover.

Preferably, the lug is installed to one side of end cover with the casing contact, just the lug can block into in the seal groove, the lid bearing is installed to the inboard of end cover, just the other end of connecting axle is followed wear out in the lid bearing and extend to the outside of end cover, utilize the lug can extrude sealed pad, make it can hug closely end cover and casing, can laminate more.

Preferably, the inside of seal box is high-pressure chamber, just high-pressure intracavity accessible the charging connector fills gas, the seal box is installed respectively shell bearing with the outside of lid bearing, box bearing is installed to the inboard of seal box, just the both ends of connecting axle are followed respectively in the box bearing of seal box of both sides wears out, and extends to the outside of seal box, through the inside of seal box for high-pressure chamber, can improve the leakproofness of bearing.

Preferably, the through hole has been seted up in the top of seal box, just seal box with constitute the communication structure through the through hole between the observation post, the structure of observation post is transparent structure, just the scale has been carved with on the observation post, the internally mounted of observation post has the piston, the outward flange of piston with the inner wall of observation post closely laminates, the piston is kept away from one side top of through hole has connect the spring, the other end top of spring is in the inboard top of observation post utilizes the observation post to observe and judges whether high-pressure intracavity gas takes place to leak.

Preferably, the outside through connection of charging connector has the check valve, just the lower extreme of charging connector is connected with the gas tube, just the other end of gas tube can be connected on the air pump, utilizes the check valve, can satisfy the unidirectionality of gas circulation, prevents that the gas of filling from leaking from the charging connector again.

The utility model has the advantages that:

1. according to the utility model, the sealing box is additionally arranged at the shell bearing position outside the shell and the cover bearing position outside the end cover, and the pressure is increased by filling gas in the high-pressure cavity in the sealing box, so that the pressure at the outer side end of the shell bearing is higher than the pressure at the inner side end of the shell bearing, and the pressure at the inner side of the cover bearing is higher than the pressure at the inner side of the cover bearing, thereby effectively preventing the liquid in the gear pump from leaking and seeping outwards through the bearing, achieving the sealing between the shaft and the bearing, judging whether the leakage occurs at the bearing position through the movement condition of the piston in the observation column, and facilitating the timely replacement and maintenance;

2. according to the utility model, through the design between the sealing groove and the protruding block, the contact area between the shell and the end cover is larger, and the gap between the sealing groove and the protruding block is filled with the sealing gasket, so that the contact tightness between the shell and the end cover can be improved.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the utility model, and that other drawings can be obtained from these drawings without inventive faculty for a person skilled in the art.

FIG. 1 is a schematic view of an isometric end cap of the present utility model;

FIG. 2 is a schematic view of an isometric structure of the present utility model in the housing direction;

FIG. 3 is a schematic view of the housing and end cap of the present utility model in semi-section;

fig. 4 is a schematic view of a cross-sectional enlarged structure at a seal cartridge of the present utility model.

In the figure: 1. a housing; 2. an end cap; 3. a seal box; 4. observing the column; 5. an air charging nozzle; 101. a pump body gear; 102. sealing grooves; 103. a sealing gasket; 104. a shell bearing; 105. a connecting shaft; 201. a bump; 202. a cover bearing; 301. a high pressure chamber; 302. a cartridge bearing; 401. a through hole; 402. a piston; 403. a spring; 501. a one-way valve; 502. and (5) an inflation tube.

Description of the embodiments

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1-3, a gear pump sealing structure comprises a casing 1 and an end cover 2, wherein the end cover 2 is used for sealing the casing 1, sealing boxes 3 are arranged on the outer sides of the casing 1 and the end cover 2, an observation column 4 is arranged on the upper side of each sealing box 3, an inflating nozzle 5 is connected to the lower side of each sealing box 3, a pump body gear 101 is rotatably arranged in the casing 1, and a connecting shaft 105 is arranged in the pump body gear 101 in a penetrating way;

when the gear pump is produced, when the gear pump is assembled, the end cover 2 can be covered on the shell 1, the lug 201 of the end cover 2 is required to be aligned with the sealing groove 102 of the shell 1 and clamped in, the sealing gasket 103 is mutually extruded to form a sealing structure, then the bolt is fixed, then the air pump can be connected through the air charging pipe 502, the high-pressure cavity 301 in the sealing box 3 is filled with air through the charging nozzle 5, the shell bearing 104 and the cover bearing 202 are sealed, when the gear pump works after being assembled, the gear pump is connected with a driving device through the connecting shaft 105, and the pump body gear 101 inside the shell 1 is driven to rotate at a high speed, so that liquid fluid is sucked and extruded into a pipeline to work.

A sealing groove 102 is formed in the end face, in contact with the end cover 2, of the shell 1, a sealing gasket 103 is filled in the sealing groove 102, the sealing gasket 103 is of a U-shaped structure, a shell bearing 104 is arranged on one side, far away from the end, in contact with the end cover 2, of the shell 1, and one end of a connecting shaft 105 penetrates out of the shell bearing 104 and extends to the outer side of the shell 1; a projection 201 is arranged on one side of the end cover 2, which is contacted with the shell 1, and the projection 201 can be clamped into the sealing groove 102, a cover bearing 202 is arranged on the inner side of the end cover 2, and the other end of the connecting shaft 105 penetrates out of the cover bearing 202 and extends to the outer side of the end cover 2;

during assembly, the lug 201 on the end cover 2 is clamped into the sealing groove 102, and the sealing gasket 103 in the sealing groove 102 is extruded, so that the sealing gasket 103 is filled in a gap between the lug 201 and the sealing groove 102, sealing effect can be improved, the sealing gasket 103 adopts a U-shaped structure, and the gap between the shell 1 and the end cover 2 can be filled and sealed, so that a double sealing structure between the end cover 2 and the shell 1 and between the lug 201 and the sealing groove 102 is achieved, and sealing effect is better.

The inside of the sealing box 3 is a high-pressure cavity 301, the high-pressure cavity 301 can be filled with gas through the charging connector 5, the sealing box 3 is respectively arranged at the outer sides of the shell bearing 104 and the cover bearing 202, the box bearing 302 is arranged at the inner side of the sealing box 3, and two ends of the connecting shaft 105 respectively penetrate out of the box bearings 302 of the sealing boxes 3 at two sides and extend to the outer sides of the sealing box 3;

during assembly, gas is filled in the high-pressure cavity 301 of the sealing box 3, so that the pressure of the high-pressure cavity 301 is larger than the pressure in the gear pump, and then liquid in the gear pump can be prevented from leaking outwards through the bearing, the effect of sealing the bearing is achieved, and the box bearing 302 is arranged on the sealing box 3, so that the connecting shaft 105 can be conveniently connected to the outer side of the sealing box 3 in a penetrating manner and connected with driving equipment.

As shown in fig. 4, the top end of the sealing box 3 is provided with a through hole 401 in a penetrating way, a communication structure is formed between the sealing box 3 and the observation column 4 through the through hole 401, the structure of the observation column 4 is a transparent structure, scales are marked on the observation column 4, a piston 402 is arranged in the observation column 4, the outer edge of the piston 402 is tightly attached to the inner wall of the observation column 4, one side, far away from the through hole 401, of the piston 402 is propped with a spring 403, and the other end of the spring 403 is propped against the top end of the inner side of the observation column 4;

in the gear pump assembly process, when the high-pressure cavity 301 of the sealing box 3 is filled with gas, due to the connection of the through holes 401, the observation column 4 is communicated with the sealing box 3, the piston 402 is pushed to move upwards along with the continuous rising of the pressure in the sealing box 3, the spring 403 is extruded, after the gas in the sealing box 3 is filled with certain pressure, the piston 402 also stays on a certain scale of the observation column 4, the standard scale can be set, whether the piston 402 moves or not is observed through the observation column 4, whether the gas in the sealing box 3 leaks or not can be judged, and the bearing can be judged to be well sealed.

The outer side of the charging connector 5 is connected with a one-way valve 501 in a penetrating way, the lower end of the charging connector 5 is connected with a charging tube 502, and the other end of the charging tube 502 can be connected to an air pump;

the one-way valve 501 is arranged on the charging nozzle 5, so that after the charging pipe 502 is charged with gas, the gas in the high-pressure cavity 301 can be prevented from leaking out through the charging nozzle 5 by utilizing the one-way conductivity of the one-way valve 501.

The working principle is that when the gear pump is produced, the gear pump is required to be assembled, the end cover 2 can be covered on the shell 1 to be sealed when the gear pump is assembled, the lug 201 of the end cover 2 is required to be aligned with the sealing groove 102 of the shell 1 and clamped in, the sealing gasket 103 is mutually extruded to form a sealing structure, then the sealing structure is fixed by bolts, then the air pump can be connected through the air inflation pipe 502, the air is inflated into the high-pressure cavity 301 in the sealing box 3 through the air inflation nozzle 5, the pressure on the outer side of the shell bearing 104 and the pressure on the outer side of the cover bearing 202 are higher than the inner side pressure, so that the effect of sealing the bearing is achieved, when the gear pump works, the gear pump is connected with a driving device through the connecting shaft 105, and the pump body gear 101 inside the shell 1 is driven to rotate at high speed, and then liquid fluid is sucked and extruded into a pipeline to work.

In the description of the present specification, the descriptions of the terms "one embodiment," "example," "specific example," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The foregoing has shown and described the basic principles, principal features and advantages of the utility model. It will be understood by those skilled in the art that the present utility model is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present utility model, and various changes and modifications may be made without departing from the spirit and scope of the utility model, which is defined in the appended claims.

Claims

1. The gear pump sealing structure is characterized by comprising a shell (1) and end covers (2), wherein the end covers (2) are used for sealing the shell (1), sealing boxes (3) are arranged on the outer sides of the shell (1) and the end covers (2), an observation column (4) is arranged on the upper side of each sealing box (3), an inflating nozzle (5) is connected to the lower side of each sealing box (3), a pump body gear (101) is rotatably arranged in the shell (1), and a connecting shaft (105) is arranged in the pump body gear (101) in a penetrating mode.

2. The gear pump seal structure of claim 1, wherein: the end face of casing (1) with end cover (2) contact has seted up seal groove (102), just seal groove (102) are filled with sealed pad (103), the structure of sealed pad (103) is "U" style of calligraphy structure, casing (1) keep away from with shell bearing (104) are installed to one side of end cover (2) contact, just the one end of connecting axle (105) is followed wear out in shell bearing (104) and extend to the outside of casing (1).

3. The gear pump seal structure of claim 2, wherein: the end cover (2) is provided with a lug (201) on one side contacted with the shell (1), the lug (201) can be clamped into the sealing groove (102), a cover bearing (202) is arranged on the inner side of the end cover (2), and the other end of the connecting shaft (105) penetrates out of the cover bearing (202) and extends to the outer side of the end cover (2).

4. A gear pump seal arrangement according to claim 3, wherein: the inside of sealed box (3) is high-pressure chamber (301), just accessible in high-pressure chamber (301) charging connector (5) are filled with gas, sealed box (3) are installed respectively shell bearing (104) with the outside of lid bearing (202), box bearing (302) are installed to the inboard of sealed box (3), just the both ends of connecting axle (105) are worn out in box bearing (302) of sealed box (3) of both sides respectively, and extend to the outside of sealed box (3).

5. The gear pump seal structure of claim 4, wherein: the top of sealed box (3) runs through and has offered through-hole (401), just sealed box (3) with constitute communication structure through-hole (401) between observing post (4), the structure of observing post (4) is transparent structure, just mark the scale on observing post (4), the internally mounted of observing post (4) has piston (402), the outward flange of piston (402) with the inner wall of observing post (4) closely laminates, piston (402) are kept away from one side top of through-hole (401) has connect spring (403), the other end top of spring (403) is in the inboard top of observing post (4).

6. The gear pump seal structure of claim 5, wherein: the outer side of the charging connector (5) is connected with a one-way valve (501) in a penetrating way, the lower end of the charging connector (5) is connected with a charging tube (502), and the other end of the charging tube (502) can be connected to an air pump.