CN112963343A - Low-noise gear pump - Google Patents
Low-noise gear pump Download PDFInfo
- Publication number
- CN112963343A CN112963343A CN202110340847.4A CN202110340847A CN112963343A CN 112963343 A CN112963343 A CN 112963343A CN 202110340847 A CN202110340847 A CN 202110340847A CN 112963343 A CN112963343 A CN 112963343A
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- China
- Prior art keywords
- gear
- pump
- shaft
- driven
- oil
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2/00—Rotary-piston machines or pumps
- F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
- F04C2/12—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
- F04C2/14—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons
- F04C2/18—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with similar tooth forms
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
- F04C15/0003—Sealing arrangements in rotary-piston machines or pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
- F04C15/0042—Systems for the equilibration of forces acting on the machines or pump
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2/00—Rotary-piston machines or pumps
- F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
- F04C2/12—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
- F04C2/14—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons
- F04C2/16—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with helical teeth, e.g. chevron-shaped, screw type
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Rotary Pumps (AREA)
- Details And Applications Of Rotary Liquid Pumps (AREA)
Abstract
The invention discloses a low-noise gear pump which comprises an elastic retainer ring, a shaft seal, a front end cover, an O-shaped ring, a bearing frame, a sliding bearing, a floating sealing base plate, a driving gear, a driven gear, a shell, a rear end cover and a bolt. The invention improves the flow and pressure pulsation problems of the gear pump, can effectively reduce noise and improve comfort; the axial reaction force on the left side and the right side of the fluid on the gear can be ensured to be balanced when the gear works, and eccentric wear is prevented; the floating sealing base plate and the zigzag framework oil seal are used for sealing, so that the internal sealing performance of the gear pump can be improved.
Description
Technical Field
The invention belongs to the technical field of gear pumps, and particularly relates to a low-noise gear pump.
Background
The gear pump has the advantages of small volume, light weight, simple structure, low price, reliable work, better self-absorption performance, insensitivity to oil pollution, convenient maintenance and the like, and is widely applied to various industries such as industry, agriculture and the like. However, the traditional gear pump usually adopts a structural mode of an involute straight toothed spur gear, is limited by structural characteristics, and inevitably generates flow and pressure pulsation when gears are meshed at high speed, so that parts are subjected to impact vibration and generate noise; in addition, the involute straight tooth cylindrical gear pump is also easily influenced by the overlapping coefficient of the teeth, the overlapping coefficient is small, the oil trapping phenomenon is easy to occur, and the problems of vibration, cavitation erosion, noise and the like caused by the impact on parts of a pump body are solved; the overlap coefficient is larger, the leakage between teeth is increased, and the gear pump efficiency is reduced. With the continuous improvement of the requirements on the use performance and the comfort of the gear pump, the gear pump which works stably and has low noise needs to be invented.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a low-noise gear pump which improves the flow rate and pressure pulsation problems of the gear pump and can effectively reduce noise.
In order to solve the technical problem, the technical scheme of the invention is as follows: a low-noise gear pump comprises a pump shell, a driving gear, a driven gear, two floating sealing backing plates, two bearing supports, two sliding bearing sets, a front end cover, a rear end cover and a plurality of bolts, wherein the driving gear and the driven gear are both provided with gear teeth and are arranged in the pump shell, the gear teeth of the driving gear and the gear teeth of the driven gear are meshed in a meshing area, the pump shell is further rotatably assembled with a driving shaft and a driven shaft which have the same axis extension direction, the driving gear is fixedly arranged on the driving shaft, the driven gear is fixedly arranged on the driven shaft, the two floating sealing backing plates are respectively matched with notches on two sides of the pump shell, the two sliding bearing sets are respectively sleeved at two ends of the driving shaft and the driven shaft and are respectively arranged in the two bearing supports, the front end cover and the rear end cover are respectively buckled on the notches on two sides, drive gear and driven gear constitute the oil feed chamber and its opposite meshing regional opposite side constitutes out the oil pocket at meshing regional one side in the pump casing, its characterized in that: the tooth profiles of the gear teeth of the driving gear and the gear teeth of the driven gear respectively comprise a circular arc tooth top, a circular arc tooth root and an involute edge, and the driving gear and the driven gear are herringbone gears.
Preferably, the sealing device further comprises O-rings arranged between the front end cover and the pump housing and between the rear end cover and the pump housing, and sealing ring grooves for accommodating the O-rings are respectively arranged on the front end cover and the rear end cover.
Preferably, the device also comprises a shaft seal and an elastic check ring, wherein the front end cover is provided with a counter bore, and the shaft seal and the elastic check ring are arranged in the counter bore.
Preferably, framework oil seals are arranged between the floating seal base plate and the driving shaft and between the floating seal base plate and the driven shaft respectively, and the cross section of each framework oil seal is zigzag.
Preferably, a high-pressure oil passage is axially arranged inside the pump housing, and the high-pressure oil passage is arranged between the two bearing supports.
Preferably, the two side end faces of the bearing support are respectively provided with an 8-shaped oil duct, and the bearing support is provided with a through hole for oil to flow.
Preferably, the sliding bearing set comprises two sliding bearings respectively sleeved on the driving shaft and the driven shaft.
Preferably, the sliding bearing is made of copper-based alloy materials, and the sliding bearing is in interference fit with the bearing support.
Preferably, the floating seal backing plate is made of polytetrafluoroethylene materials.
Compared with the prior art, the invention has the advantages that:
(1) according to the invention, the structural form of 'arc + involute + herringbone helix' of the driving gear and the driven gear is adopted, so that the problems of flow and pressure pulsation of the gear pump are solved, the noise can be effectively reduced, and the comfort is improved;
(2) the herringbone gear is adopted, so that the balance of axial reaction forces on the left side and the right side of fluid on the gear during working can be ensured, and eccentric wear is prevented;
(3) the invention seals through the floating seal cushion plate and the zigzag framework oil seal, and can improve the internal sealing performance of the gear pump.
Drawings
FIG. 1 is an exploded view of a low noise gear pump of the present invention;
FIG. 2 is a schematic view of the engagement of the driving gear and the driven gear in the present invention;
the left side view of fig. 3 and 2;
FIG. 4 is a schematic view of the construction of the floating seal insert of the present invention;
FIG. 5 is a cross-sectional view of a floating seal pad of the present invention;
FIG. 6 is a schematic view of the structure of the pump casing of the present invention;
FIG. 7 is a schematic view of the structure of the bearing bracket of the present invention;
description of reference numerals:
1. the device comprises a pump shell, 2, a driving gear, 3, a driven gear, 4, a floating sealing cushion plate, 5, a bearing support, 6, a sliding bearing group, 7, a front end cover, 8, a rear end cover, 9, a bolt, 10, an O-shaped ring, 11, a shaft seal, 12 and an elastic check ring.
Detailed Description
The following describes embodiments of the present invention with reference to examples:
it should be noted that the structures, proportions, sizes, and other elements shown in the specification are included for the purpose of understanding and reading only, and are not intended to limit the scope of the invention, which is defined by the claims, and any modifications of the structures, changes in the proportions and adjustments of the sizes, without affecting the efficacy and attainment of the same.
In addition, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not to be construed as a scope of the present invention.
As shown in fig. 1-7, a low noise gear pump comprises a pump housing 1, a driving gear 2, a driven gear 3, two floating seal pads 4, two bearing supports 5, two sliding bearing sets 6, a front cover 7, a rear cover 8 and a plurality of bolts 9, wherein the driving gear 2 and the driven gear 3 are both provided with gear teeth and are arranged in the pump housing 1, the gear teeth of the driving gear 2 and the gear teeth of the driven gear 3 are meshed in a meshing area, the pump housing 1 is further rotatably provided with a driving shaft and a driven shaft with the same axial extension direction, the driving gear 2 is fixedly arranged on the driving shaft, the driven gear 3 is fixedly arranged on the driven shaft, the two floating seal pads 4 are respectively matched with notches at two sides of the pump housing 1, the two sliding bearing sets 6 are respectively sleeved at two ends of the driving shaft and the driven shaft, and the two sliding bearing sets 6 are respectively arranged in, the front end cover 7 and the rear end cover 8 are respectively buckled on notches at two sides of the pump shell 1 and are fixed into a whole through a plurality of bolts 9, an oil inlet cavity is formed on one side of a meshing area of the driving gear 2 and the driven gear 3 in the pump shell 1, and an oil outlet cavity is formed on the other side of the opposite meshing area;
the tooth profiles of the gear teeth of the driving gear 2 and the gear teeth of the driven gear 3 respectively comprise an arc-shaped tooth top, an arc-shaped tooth root and an involute edge, and the driving gear 2 and the driven gear 3 are herringbone gears.
In conclusion, the driving gear 2 and the driven gear 3 adopt a structural form of 'circular arc + involute + herringbone helix', the bottoms and the tops of the gear teeth are circular arcs, the circular arcs are in involute transition, and the gear teeth are in a herringbone helical structure on a cylindrical surface.
Helical gears have a transverse force on the shaft, and to eliminate this force, one gear is made into a helical gear with opposite symmetrical directions, so as to eliminate this force, and the helical gear looks like a personal character, which is called herringbone gear for short. The herringbone gear has the advantages of high contact ratio, small axial load, high bearing capacity and stable work.
Specifically, the pump further comprises O-rings 10 arranged between the front end cover 7 and the pump housing 1 and between the rear end cover 8 and the pump housing 1, and sealing ring grooves for accommodating the O-rings 10 are respectively arranged on the front end cover 7 and the rear end cover 8.
Specifically, the shaft seal device further comprises a shaft seal 11 and a elastic check ring 12, a counter bore is formed in the front end cover 7, and the shaft seal 11 and the elastic check ring 12 are installed in the counter bore. The O-ring 10, the shaft seal 11 and the elastic retainer ring 12 prevent internal oil from leaking.
Framework oil seals are arranged between the floating seal base plate 4 and the driving shaft and the driven shaft respectively, and the cross sections of the framework oil seals are in a zigzag shape.
The oil seal generally serves to isolate the components to be lubricated from the output components, so as not to allow the lubricating oil to leak. The framework acts as a reinforcement for the steel bars inside the concrete member and allows the oil seal to maintain shape and tension.
A high-pressure oil passage is axially provided inside the pump housing 1, and the high-pressure oil passage is provided between the two bearing brackets 5. The pressure oil in the high-pressure oil channel is tightly pressed on the end face of the gear, and meanwhile, the floating seal cushion plate 4 and the gear shaft are provided with a zigzag framework oil seal, so that the internal leakage of the oil of the gear pump can be effectively reduced by the two measures.
All be provided with "8" font oil duct on the both sides terminal surface of bearing bracket 5, offer the through-hole that is used for the fluid circulation on bearing bracket 5.
The sliding bearing group 6 comprises two sliding bearings which are respectively sleeved on the driving shaft and the driven shaft.
The sliding bearing is made of copper-based alloy materials and is in interference fit with the bearing support 5.
The floating seal backing plate 4 is made of polytetrafluoroethylene materials. Polytetrafluoroethylene materials are commonly referred to as "non-stick coatings" or "easy-to-clean materials". The material has the characteristics of acid resistance, alkali resistance and various organic solvents resistance, and is almost insoluble in all solvents. Meanwhile, the polytetrafluoroethylene has the characteristic of high temperature resistance, has extremely low friction coefficient and can have a lubricating effect.
The working principle of the invention is as follows:
the space that the teeth of a cogwheel of driving gear 2 and driven gear 3 meshing enclose floating seal backing plate 4 and pump casing 1 of left and right sides is divided into oil feed chamber and oil outlet chamber two parts, and when driving gear 2 drove driven gear 3 rotatory, the low pressure fluid of oil feed chamber is continuous to be brought into the oil outlet chamber through the space between the teeth of a cogwheel and the casing, and at the meshing in-process of the teeth of a cogwheel, the fluid in oil outlet chamber can only discharge through the oil-out, produces the fluid of certain pressure.
By adopting the structural form of 'arc + involute + herringbone helix', when the gear teeth are meshed to work, the flow and pressure pulsation can be effectively reduced, and the noise is reduced; meanwhile, the herringbone spiral can ensure that the axial reaction force on the left side and the axial reaction force on the right side of the gear are balanced, and eccentric wear is prevented.
The floating seal backing plates 4 arranged on the left side and the right side of the driving gear 2 and the driven gear 3 are pressed on the end faces of the gears through pressure oil from high-pressure oil ducts in the pump shell 1 and the bearing support 5, and meanwhile, Y-shaped framework oil seals are arranged between the floating seal backing plates 4 and the driving shaft and between the floating seal backing plates 4 and the driven shaft, so that internal leakage of oil of the gear pump can be effectively reduced.
In conclusion, the gear pump has the advantages that the problems of flow and pressure pulsation of the gear pump are solved, noise can be effectively reduced, and comfort is improved.
While the preferred embodiments of the present invention have been described in detail, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.
Many other changes and modifications can be made without departing from the spirit and scope of the invention. It is to be understood that the invention is not to be limited to the specific embodiments, but only by the scope of the appended claims.
Claims (9)
1. The utility model provides a low noise gear pump, including pump casing (1), driving gear (2), driven gear (3), two floating seal backing plate (4), two bearing bracket (5), two sliding bearing group (6), front end housing (7), rear end cap (8) and a plurality of bolt (9), driving gear (2) and driven gear (3) all have the gear tooth and are set up in pump casing (1), wherein the gear tooth of driving gear (2) and the gear tooth of trailing wheel gear (3) mesh in the meshing region, still rotate on pump casing (1) and be equipped with the unanimous driving shaft of axis extending direction and driven shaft, driving gear (2) set firmly in on the driving shaft, driven gear (3) set firmly on the driven shaft, two floating seal backing plate (4) cooperate with the notch of pump casing (1) both sides respectively, two sliding bearing group (6) suit are respectively at the both ends of driving shaft and driven shaft and two sliding bearing group (6) divide at driving shaft and two sliding bearing group (6 Do not set up in two bearing bracket (5), front end housing (7) and rear end housing (8) lock respectively on the notch of pump casing (1) both sides and fixed as an organic whole through a plurality of bolts (9), drive gear (2) and driven gear (3) constitute oil feed chamber and its relative meshing regional opposite side in the one side of meshing region and constitute out the oil pocket, its characterized in that in pump casing (1): the tooth profiles of the gear teeth of the driving gear (2) and the gear teeth of the driven gear (3) comprise a circular arc tooth top, a circular arc tooth root and an involute edge, and the driving gear (2) and the driven gear (3) are herringbone gears.
2. A low noise gear pump according to claim 1, wherein: the sealing device is characterized by further comprising O-shaped rings (10) arranged between the front end cover (7) and the pump shell (1) and between the rear end cover (8) and the pump shell (1), wherein sealing ring grooves for containing the O-shaped rings (10) are respectively formed in the front end cover (7) and the rear end cover (8).
3. A low noise gear pump according to claim 2, wherein: the bearing further comprises a shaft seal (11) and an elastic retainer ring (12), a counter bore is formed in the front end cover (7), and the shaft seal (11) and the elastic retainer ring (12) are installed in the counter bore.
4. A low noise gear pump according to claim 3, wherein: and framework oil seals are arranged between the floating sealing base plate (4) and the driving shaft and the driven shaft respectively, and the cross section of each framework oil seal is in a zigzag shape.
5. A low noise gear pump according to claim 1, wherein: the pump casing (1) is internally provided with a high-pressure oil channel along the axial direction, and the high-pressure oil channel is arranged between the two bearing supports (5).
6. A low noise gear pump according to claim 1, wherein: the oil duct bearing is characterized in that 8-shaped oil ducts are arranged on the end faces of the two sides of the bearing support (5), and through holes for oil to flow through are formed in the bearing support (5).
7. A low noise gear pump according to claim 1, wherein: the sliding bearing group (6) comprises two sliding bearings which are respectively sleeved on the driving shaft and the driven shaft.
8. A low noise gear pump according to claim 7, wherein: the sliding bearing is made of copper-based alloy materials and is in interference fit with the bearing support (5).
9. A low noise gear pump according to claim 1, wherein: the floating sealing base plate (4) is made of polytetrafluoroethylene materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110340847.4A CN112963343A (en) | 2021-03-30 | 2021-03-30 | Low-noise gear pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110340847.4A CN112963343A (en) | 2021-03-30 | 2021-03-30 | Low-noise gear pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112963343A true CN112963343A (en) | 2021-06-15 |
Family
ID=76279714
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110340847.4A Pending CN112963343A (en) | 2021-03-30 | 2021-03-30 | Low-noise gear pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112963343A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113606131A (en) * | 2021-08-23 | 2021-11-05 | 兑通真空技术(上海)有限公司 | Cantilever connecting structure for roots pump or screw pump |
| CN116877422A (en) * | 2023-08-07 | 2023-10-13 | 深圳华星恒泰泵阀有限公司 | Gear pump |
-
2021
- 2021-03-30 CN CN202110340847.4A patent/CN112963343A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113606131A (en) * | 2021-08-23 | 2021-11-05 | 兑通真空技术(上海)有限公司 | Cantilever connecting structure for roots pump or screw pump |
| CN113606131B (en) * | 2021-08-23 | 2023-08-25 | 兑通真空技术(上海)有限公司 | Cantilever connection structure for Roots pump or screw pump |
| CN116877422A (en) * | 2023-08-07 | 2023-10-13 | 深圳华星恒泰泵阀有限公司 | Gear pump |
| CN116877422B (en) * | 2023-08-07 | 2024-01-23 | 深圳华星恒泰泵阀有限公司 | Gear pump |
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