CN211549974U - High-pressure-resistant high-temperature gear oil pump - Google Patents
High-pressure-resistant high-temperature gear oil pump Download PDFInfo
- Publication number
- CN211549974U CN211549974U CN202020073593.5U CN202020073593U CN211549974U CN 211549974 U CN211549974 U CN 211549974U CN 202020073593 U CN202020073593 U CN 202020073593U CN 211549974 U CN211549974 U CN 211549974U
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- oil
- driving gear
- pressure
- gear shaft
- pump body
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- 239000012208 gear oil Substances 0.000 title claims abstract description 21
- 239000003921 oil Substances 0.000 claims abstract description 93
- 238000007789 sealing Methods 0.000 claims abstract description 46
- 210000004907 gland Anatomy 0.000 claims abstract description 40
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 21
- 239000010959 steel Substances 0.000 claims abstract description 21
- 238000012856 packing Methods 0.000 claims description 39
- 239000000945 filler Substances 0.000 claims description 13
- 230000005540 biological transmission Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 2
- 238000003466 welding Methods 0.000 description 4
- 239000007788 liquid Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
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- Rotary Pumps (AREA)
- Details And Applications Of Rotary Liquid Pumps (AREA)
Abstract
The application discloses a high-pressure-resistant high-temperature gear oil pump which comprises a pump body, and a driving gear shaft and a driven gear shaft which are arranged in the pump body, wherein a driving gear is arranged on the driving gear shaft, and a driven gear is arranged on the driven gear shaft; the pump body is provided with an oil inlet, an oil outlet and an oil passage, and the front end and the rear end of the pump body are respectively provided with a front cover and a rear cover; the middle part of the front cover is provided with an oil pressure cavity, and a pressure limiting valve component is arranged in the oil pressure cavity; the pressure limiting valve assembly comprises a safety valve gland fixedly installed at the front end opening of the oil pressure cavity, and a spring seat, a spring, a sealing clamping sleeve and a valve core steel ball which are arranged in the oil pressure cavity, wherein the valve core steel ball is fixedly arranged on the sealing clamping sleeve, and the sealing clamping sleeve is fixedly installed on the spring seat through the spring. The device of this application has simple structure, to advantages such as oil pollution insensitivity, can effectively prevent to be stranded oily district pressure and too high and cause the phenomenon of leaking, and the volumetric efficiency of device is high.
Description
Technical Field
The application relates to a high-pressure-resistant high-temperature gear oil pump.
Background
As the industry develops, the industry has increasingly demanded increased pump performance. Especially in petrochemical industry, the conventional pump fails due to the particularity of the medium. In order to improve the mechanical matching degree, a gear pump more suitable for complex working conditions is adopted. In the application field of gear pumps, the oil trapping phenomenon is an inevitable technical problem of the gear pumps and must be solved by taking measures. The existing gear pump usually adopts a mode of opening the relief groove, but the size of the pump structure is enlarged due to the relief groove structure, and the volumetric efficiency is reduced. In addition, the way of opening the unloading groove can cause a certain degree of internal leakage. Therefore, the current research is urgently needed for a novel high-temperature gear oil pump which solves the oil trapping phenomenon.
Disclosure of Invention
To the above-mentioned technical problem that prior art exists, the aim at of this application provides one kind and adopts the pressure limiting valve subassembly to solve the high temperature gear oil pump of trapping oily phenomenon.
The high-pressure-resistant high-temperature gear oil pump comprises a pump body, and a driving gear shaft and a driven gear shaft which are arranged in the pump body, wherein a driving gear is arranged on the driving gear shaft, a driven gear is arranged on the driven gear shaft, and the driving gear and the driven gear are meshed with each other to form transmission; the pump body is provided with an oil inlet, an oil outlet and an oil passing channel for connecting the oil inlet and the oil outlet, and the front end and the rear end of the pump body are respectively provided with a front cover and a rear cover; the method is characterized in that: an oil pressure cavity is arranged in the middle of the front cover, and a pressure limiting valve assembly is arranged in the oil pressure cavity; the pressure limiting valve assembly comprises a safety valve gland fixedly arranged at an opening at the front end of the oil pressure cavity, a spring seat, a spring, a sealing clamping sleeve and a valve core steel ball fixedly arranged on the sealing clamping sleeve, wherein the spring seat, the spring, the sealing clamping sleeve and the valve core steel ball are fixedly arranged in the oil pressure cavity;
the rear end opening of the oil pressure cavity is communicated with a horizontal pressure relief channel, and the oil pressure cavity close to the rear end opening is communicated with an oil outlet channel and is communicated with an oil outlet of the pump body through the oil outlet channel; under the elastic force action of the spring, the pressure relief channel and the oil outlet channel are plugged together by the whole formed by the sealing clamping sleeve and the valve core steel ball; the tooth surface meshing position of the driving gear and the driven gear is arranged at the same height with the rear end opening of the pressure relief channel, and high-pressure oil flowing out of the tooth side of the gap at the tooth surface meshing position of the driving gear and the driven gear can horizontally push the valve core steel ball to compress the spring and is communicated with the pressure relief channel and the oil outlet channel.
The high-pressure-resistant high-temperature gear oil pump is characterized in that: the front end and the rear end of the driven gear shaft penetrate out of the pump body and horizontally extend into the front cover and the rear cover respectively, the front end of the driven gear shaft is fixed in the front cover at the front end of the pump body through a needle bearing and a labyrinth seal ring, and the rear end of the driven gear shaft is fixed in the rear cover at the rear end of the pump body through a needle bearing and a labyrinth seal ring.
The high-pressure-resistant high-temperature gear oil pump is characterized in that: the front end and the rear end of the driving gear shaft penetrate out of the pump body, and the front end of the driving gear shaft is hermetically fixed in a front cover at the front end of the pump body through a needle bearing and a labyrinth seal ring; a gland opening is formed in one side, away from the pump body, of the rear cover, a shaft end gland is fixedly mounted on the gland opening, and the rear end of the driving gear shaft sequentially penetrates out of the interior of the rear cover and the shaft end gland and is connected with a driving motor; the shaft end gland is provided with a through hole, the rear end of the driving gear shaft penetrates out of the through hole of the shaft end gland, and a felt sealing ring for sealing is arranged between the outer wall of the side part of the driving gear shaft and the through hole of the shaft end gland.
The high-pressure-resistant high-temperature gear oil pump is characterized in that: a packing cavity, sealing packing and a packing gland are also arranged between the outer wall of the side part of the driving gear shaft and the inner wall of the rear cover; a cavity for filling sealing filler is arranged in the filler cavity, and an opening matched with one end part of the filler gland is arranged on the side part of one side of the filler cavity; the sealing filler is filled into the cavity inside the packing cavity from the side opening of the packing cavity, and one end of the packing gland is matched and plugged into the side opening of the packing cavity for sealing, so that the sealing filler can be tightly filled around the outer wall of the side part of the driving gear shaft for sealing.
The high-pressure-resistant high-temperature gear oil pump is characterized in that: the sealing packing is a metal packing.
The beneficial effect of this application does: the device of the application has the advantages of simple structure, light weight, insensitivity to oil pollution and the like. Meanwhile, in order to better solve the oil trapping phenomenon, the pressure limiting valve assembly is adopted to solve the problem, the phenomenon that the oil trapping area is too high in pressure and causes leakage and danger can be effectively prevented, meanwhile, the size of the device can be reduced by adopting the pressure limiting valve assembly to solve the oil trapping phenomenon, and meanwhile, the volume efficiency of the device is improved.
Drawings
FIG. 1 is a schematic structural diagram of a high temperature gear oil pump according to the present application;
FIG. 2 is an enlarged view taken at A in FIG. 1;
FIG. 3 is a side, semi-sectional view of a high temperature gear oil pump;
FIG. 4 is a schematic structural view taken along section B-B in FIG. 1;
in the figure: 1-a pump body, 2-a front cover, 3-a driven gear shaft, 3 a-a driven gear, 4-a rear cover, 5-a driving gear shaft, 5 a-a driving gear, 6-a packing gland, 7-a packing cavity, 8-a sealing packing, 9-a hexagon head slotted bolt, 10-a felt sealing ring, 11-a shaft end gland, 12-a hexagon head bolt, 13-a spline, 14-a needle roller bearing, 15-a first protruding panel type flat welding flange, 16-a safety valve gland, 17-a spring seat, 18-a spring, 19-a valve core steel ball, 20-a sealing clamping sleeve, 21-a labyrinth sealing ring, 22-a second protruding panel type flat welding flange, 23-a pressure relief channel and 24-an oil outlet channel.
Detailed Description
The present invention is further illustrated by the following examples, which should not be construed as limiting the scope of the invention.
Example (b): compare FIGS. 1-3
A high-pressure-resistant high-temperature gear oil pump comprises a pump body 1, and a driving gear shaft 5 and a driven gear shaft 3 which are arranged in the pump body 1, wherein a driving gear 5a is arranged on the driving gear shaft 5, a driven gear 3a is arranged on the driven gear shaft 3, and the driving gear 5a and the driven gear 3a are meshed with each other to form transmission; the pump body 1 is provided with an oil inlet, an oil outlet and an oil passage for connecting the oil inlet and the oil outlet, and the front end and the rear end of the pump body 1 are respectively provided with a front cover 2 and a rear cover 4. As can be seen from a comparison of fig. 1, the front cover 2 and the rear cover 4 are respectively fixed at the front end and the rear end of the pump body 1 by means of hexagon bolts 12.
Wherein, the driven gear shaft 3 is divided into five sections: the first section and the second section of the driven gear shaft 3 are respectively arranged in the front cover 2 through a needle bearing 14 and a labyrinth seal ring 21, the third section of the driven gear shaft 3 is arranged in the pump body 1, the side wall of the third section of the driven gear shaft 3 is fixedly provided with a driven gear 3a through a spline 13, and the fourth section and the fifth section of the driven gear shaft 3 are respectively arranged in the rear cover 4 through the labyrinth seal ring 21 and the needle bearing 14. The labyrinth seal ring 21 is provided for sealing.
As can be seen from a comparison of fig. 1, the right end of the rear cover 4 is provided with a gland opening for mounting the driving gear shaft 5, and the shaft end gland 11 is mounted and fixed on the gland opening at the right end of the rear cover 4 through a hexagon head slotted bolt 9. Wherein, driving gear shaft 5 divide into seven sections: the first section and the second section of the driving gear shaft 5 are arranged in the front cover 2 through a needle bearing and a labyrinth seal ring respectively, the third section of the driving gear shaft 5 is arranged in the pump body 1, a driving gear 5a is fixedly arranged on the side wall of the third section of the driving gear shaft 5 through a spline 13, the fourth section, the fifth section and the sixth section of the driving gear shaft 5 are located in the rear cover 4, and the fifth section of the driving gear shaft 5 is fixed in the rear cover 4 through a needle bearing. A packing cavity 7, a sealing packing 8 and a packing gland 6 are arranged between the side wall of the sixth section of the driving gear shaft 5 and the inner wall of the rear cover 4; the packing cavity 7 is internally provided with a cavity for filling the sealing packing 8, and the side part of one side of the packing cavity 7 is provided with an opening matched with the end part of one end of the packing gland 6, namely, the end part of one end of the packing gland 6 can be matched and tightly plugged into the opening of the side part of the packing cavity 7.
As can be seen from the comparison of fig. 1, the sealing filler 8 is filled into the cavity inside the packing cavity 7 from the side opening of the packing cavity 7, and the end of the packing gland 6 is then fitted into the side opening of the packing cavity 7 to perform sealing, so that the sealing filler 8 can be tightly filled around the outer wall of the side portion of the driving gear shaft 5 to perform sealing (where the sealing filler 8 may be a metal packing). Referring to fig. 1, it can be seen that the integral structure formed by the packing gland 6, the sealing packing 8 in the cavity of the packing cavity 7 and the packing cavity 7 is tightly pressed and fixed between the needle bearing on the side wall of the fifth section of the driving gear shaft 5 and the shaft end gland 11. The shaft end gland 11 is provided with an outlet hole, the inner side of the outlet hole is provided with a seal ring groove, the felt seal ring 10 is arranged in the seal ring groove at the inner side of the outlet hole in a matching way, the sixth section end of the driving gear shaft 5 penetrates out of the outlet hole of the shaft end gland 11, and the felt seal ring 10 is tightly attached to the outer side of the sixth section end of the driving gear shaft 5, namely the felt seal ring 10 is arranged between the outlet hole of the shaft end gland 11 and the outer wall of the driving gear shaft 5 so as to be further sealed.
Referring to fig. 1, it can be seen that the seventh section of the driving gear shaft 5 is located outside the shaft end gland 11, and the sidewall of the seventh section of the driving gear shaft 5 is connected with the driving motor through the spline 13. Under the driving action of the driving motor, the driving gear shaft 5 rotates and drives the driving gear 5a on the driving gear shaft 5 to rotate, thereby causing the driven gear 3a on the driven gear shaft 3 to rotate.
As can be seen from the comparison of the figures 1 and 2, the middle part of the front cover 2 is provided with an oil pressure cavity, the front end and the rear end of the oil pressure cavity are both provided with openings, and a pressure limiting valve component is arranged in the oil pressure cavity. The pressure limiting valve assembly comprises a safety valve gland 16 fixedly mounted at the front end opening of the oil pressure cavity, and a spring seat 17, a spring 18, a sealing cutting sleeve 20 and a valve core steel ball 19 which are arranged in the oil pressure cavity, wherein the valve core steel ball 19 is fixedly arranged on the sealing cutting sleeve 20, and the sealing cutting sleeve 20 is fixedly mounted on the spring seat 17 through the spring 18.
As can be seen from a comparison of fig. 1, 2 and 4, the rear end opening of the oil pressure cavity is communicated with a horizontal pressure relief channel 23, and the oil pressure cavity close to the rear end opening thereof is communicated with an oil outlet channel 24 and is communicated with an oil outlet of the pump body 1 through the oil outlet channel 24; under the action of the elastic force of the spring 18, the whole formed by the sealing clamping sleeve 20 and the valve core steel ball 19 blocks the pressure relief channel 23 and the oil outlet channel 24.
The tooth surface meshing positions of the driving gear 5a and the driven gear 3a are arranged at the same height with the rear end opening of the pressure relief channel 23, so that high-pressure oil flowing out of the tooth side of a gap at the tooth surface meshing positions of the driving gear 5a and the driven gear 3a can horizontally push the valve core steel ball 19 to compress the spring 18 and is communicated with the pressure relief channel 23 and the oil outlet channel 24 (namely, the high-pressure oil flowing out of the tooth side of the gap at the tooth surface meshing positions of the driving gear 5a and the driven gear 3a pushes the valve core steel ball 19 towards the front end opening of the oil pressure cavity, and the high-pressure oil flows out of the oil outlet of the pump body 1 through the oil outlet channel 24 after entering the oil pressure cavity). The valve core steel ball 19 has the advantages that the streamline of the valve core steel ball is smooth, the resistance is small, and if a flat plate is adopted, the valve core steel ball is impacted too much when the pressure is unstable, and is easy to damage.
The device structure of this application can effectively solve the trapping oil phenomenon that prior art's high temperature gear oil pump exists when carrying out the work, leads to the technical problem that the volume efficiency of the structure size grow of gear oil pump, oil pump is lower.
The working principle of the specific implementation mode of the application is as follows:
when the device works, the purpose of conveying liquid is achieved by means of position change of an inter-tooth meshing space of the driving gear 5a and the driven gear 3a, as the contact ratio of meshing of the gears is larger than 1, two pairs of gear teeth are always meshed simultaneously, and a part of oil is enclosed between the closed cavities defined by the two pairs of gear teeth, so that the oil trapping phenomenon can be generated. The comparison graph 3 is a side half-sectional view of the high-temperature gear oil pump of the present application (as can be seen from the comparison graph 3, a first protruding panel type flat welding flange 15 is installed at an oil inlet of the pump body 1, and a second protruding panel type flat welding flange 22 is installed at an oil outlet of the pump body 1), it can be seen that a situation that two gear teeth of the driving gear 5a and two gear teeth of the driven gear 3a are simultaneously meshed occurs, so that an oil trapping phenomenon may cause an excessively high pressure in an oil trapping region, in the structure of the apparatus of the present application, a lateral portion of the oil trapping region can flow out high-pressure oil which is horizontally straight to push a valve core steel ball 19 to compress a spring 18 and then enter the oil pressure cavity, as can be seen from the comparison graph 4, the oil pressure cavity is close to a rear end opening thereof and communicated with the oil outlet of the pump body 1 through an oil outlet channel 24, so as to convey high-pressure oil to the oil outlet, thereby creating a hazard and at the same time improving the volumetric efficiency of the device. When the position of the inter-tooth meshing space of the driving gear 5a and the driven gear 3a changes to the state that two pairs of gear teeth are not meshed simultaneously, the spring 18 recovers certain elasticity to push the sealing sleeve 20 and the valve core steel ball 19 to the initial state, namely, the whole formed by the sealing sleeve 20 and the valve core steel ball 19 blocks the pressure relief channel 23 and the oil outlet channel 24 again, and the liquid oil which is transmitted by the meshing of the driving gear 5a and the driven gear 3a flows out of the oil outlet through the oil passage of the pump body 1.
The statements in this specification merely set forth a list of implementations of the inventive concept and the scope of the present invention should not be construed as limited to the particular forms set forth in the examples.
Claims (4)
1. A high-pressure-resistant high-temperature gear oil pump comprises a pump body (1), and a driving gear shaft (5) and a driven gear shaft (3) which are arranged in the pump body (1), wherein a driving gear (5 a) is arranged on the driving gear shaft (5), a driven gear (3 a) is arranged on the driven gear shaft (3), and the driving gear (5 a) and the driven gear (3 a) are meshed with each other to form transmission; an oil inlet, an oil outlet and an oil passing channel for connecting the oil inlet and the oil outlet are arranged on the pump body (1), and a front cover (2) and a rear cover (4) are respectively arranged at the front end and the rear end of the pump body (1); the method is characterized in that: an oil pressure cavity is arranged in the middle of the front cover (2), and a pressure limiting valve assembly is installed in the oil pressure cavity; the pressure limiting valve assembly comprises a safety valve gland (16) fixedly arranged at an opening at the front end of the oil pressure cavity, a spring seat (17), a spring (18), a sealing clamping sleeve (20) and a valve core steel ball (19) fixedly arranged on the sealing clamping sleeve (20), wherein the spring seat (17) is fixedly arranged in the oil pressure cavity, one end of the spring (18) is fixedly connected with the spring seat (17), and the other end of the spring (18) is fixedly connected with the sealing clamping sleeve (20);
the rear end opening of the oil pressure cavity is communicated with a horizontal pressure relief channel (23), and the oil pressure cavity close to the rear end opening is communicated with an oil outlet channel (24) and is communicated with an oil outlet of the pump body (1) through the oil outlet channel (24); under the elastic force action of the spring (18), the pressure relief channel (23) and the oil outlet channel (24) are plugged by the whole formed by the sealing sleeve (20) and the valve core steel ball (19);
the tooth surface meshing part of the driving gear (5 a) and the driven gear (3 a) is arranged at the same height as the rear end opening of the pressure relief channel (23), and high-pressure oil flowing out of the tooth side of the gap at the tooth surface meshing part of the driving gear (5 a) and the driven gear (3 a) can horizontally push the valve core steel ball (19) to compress the spring (18) and is communicated with the pressure relief channel (23) and the oil outlet channel (24).
2. A high-pressure resistant, high-temperature gear oil pump as claimed in claim 1, wherein: the front end and the rear end of the driven gear shaft (3) penetrate out of the pump body (1) and horizontally extend into the front cover (2) and the rear cover (4) respectively, the front end of the driven gear shaft (3) is fixed in the front cover (2) at the front end of the pump body (1) through a needle bearing (14) and a labyrinth seal ring (21), and the rear end of the driven gear shaft (3) is fixed in the rear cover (4) at the rear end of the pump body (1) through the needle bearing (14) and the labyrinth seal ring (21).
3. A high-pressure resistant, high-temperature gear oil pump as claimed in claim 1, wherein: the front end and the rear end of the driving gear shaft (5) penetrate out of the pump body (1), and the front end of the driving gear shaft (5) is hermetically fixed in a front cover (2) at the front end of the pump body (1) through a needle bearing and a labyrinth seal ring;
a gland opening is formed in one side, away from the pump body (1), of the rear cover (4), a shaft end gland (11) is fixedly mounted on the gland opening, and the rear end of the driving gear shaft (5) sequentially penetrates out of the interior of the rear cover (4) and the shaft end gland (11) and is connected with a driving motor; be equipped with on axle head gland (11) and wear out the hole, driving gear axle (5) rear end is worn out from the hole of wearing out of axle head gland (11), and is equipped with between the hole of wearing out of driving gear axle (5) lateral part outer wall and axle head gland (11) and is used for sealed felt sealing washer (10).
4. A high-pressure resistant high-temperature gear oil pump as claimed in claim 3, characterized in that: a packing cavity (7), a sealing packing (8) and a packing gland (6) are also arranged between the outer wall of the side part of the driving gear shaft (5) and the inner wall of the rear cover (4); a cavity for filling the sealing filler (8) is arranged in the filler cavity (7), and an opening matched with one end part of the filler gland (6) is arranged on the side part of one side of the filler cavity (7);
the sealing packing (8) is filled into the cavity inside the packing cavity (7) from the side opening of the packing cavity, and the end part of one end of the packing gland (6) is matched and plugged into the side opening of the packing cavity (7) for sealing, so that the sealing packing (8) can be tightly filled around the outer wall of the side part of the driving gear shaft (5) for sealing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020073593.5U CN211549974U (en) | 2020-01-14 | 2020-01-14 | High-pressure-resistant high-temperature gear oil pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020073593.5U CN211549974U (en) | 2020-01-14 | 2020-01-14 | High-pressure-resistant high-temperature gear oil pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211549974U true CN211549974U (en) | 2020-09-22 |
Family
ID=72491731
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020073593.5U Expired - Fee Related CN211549974U (en) | 2020-01-14 | 2020-01-14 | High-pressure-resistant high-temperature gear oil pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211549974U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112610472A (en) * | 2020-12-22 | 2021-04-06 | 金迈思液压设备（天津）有限公司 | High-pressure gear pump with safety valve additionally arranged on rear end cover |
-
2020
- 2020-01-14 CN CN202020073593.5U patent/CN211549974U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112610472A (en) * | 2020-12-22 | 2021-04-06 | 金迈思液压设备（天津）有限公司 | High-pressure gear pump with safety valve additionally arranged on rear end cover |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200922 |
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| CF01 | Termination of patent right due to non-payment of annual fee |