CN209687707U - A kind of crescent gear pump radial pressure compensation interstitial structure - Google Patents
A kind of crescent gear pump radial pressure compensation interstitial structure Download PDFInfo
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- CN209687707U CN209687707U CN201920054241.2U CN201920054241U CN209687707U CN 209687707 U CN209687707 U CN 209687707U CN 201920054241 U CN201920054241 U CN 201920054241U CN 209687707 U CN209687707 U CN 209687707U
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- oil outlet
- seat board
- outlet seat
- gear pump
- oil
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Abstract
The utility model is to compensate interstitial structure about a kind of crescent gear pump radial pressure, including oil outlet seat board, the oil outlet seat board is arc-shaped, the concave surface of oil outlet seat board and the outer gear ring of gear wheel match, the middle part of the oil outlet seat board is equipped with an oil outlet, a pocketed oil chamber is equipped in the middle part of the concave surface of oil outlet seat board, the internal diameter of the pocketed oil chamber is greater than the internal diameter of oil outlet, the two sides on the convex surface of oil outlet seat board are respectively provided with a plunger shaft, two-piston is intracavitary to be respectively provided with a piston block, an O-ring is arranged on the piston block, the piston block is closely connected with plunger shaft, an aperture is respectively provided between two-piston chamber and the pocketed oil chamber of oil outlet seat board.After adopting the above structure, the beneficial effect is that: the radial pressure compensation of crescent gear pump may be implemented, so that zero spacing of outer gear ring of oil outlet seat board and gear wheel cooperates, form radial rigidity support, the stability for ensuring flow, pressure guarantees the normal operation of gear pump.
Description
Technical field
The utility model belongs to inside engaged gear pump technical field, is about a kind of crescent gear pump diameter specifically
To pressure compensation interstitial structure.
Background technique
Crescent gear pump is using gear internal messing principle, and internal-external gear pitch circle abuts one side.In active on main shaft
Gear drive wherein external gear rotate in same direction, be separated from each other to form negative pressure and suck liquid in entrance gear, gear is exporting
Place's constantly insertion engages and squeezes liquid and export.
In engagement, the oil liquid of part is extruded between gear for existing crescent gear pump, gear wheel and pinion gear, is entered
Pumping cavity.Gear have during pressure oil, in pumping cavity action of hydraulic force on gear, be easy to cause oil from tooth top leakage (i.e.
Leaked from the end face of gear ring to outer gear ring), the oil liquid of leakage is trapped between the outer gear ring of gear wheel and gear pump case, so that tooth
Pressure in wheel pump is inadequate, so that the radial imbalance force that gear and bearing are subject to, and then protect gear pump can not always
Hold certain oil pressure state.When hydraulic coupling is higher, it is bigger that this radially mends equilibrant force, as a result, the abrasion of bearing is accelerated,
The service life of bearing is reduced, or even causes tooth top and the friction of pump housing inner wall etc., to influence the normal operation of gear pump.Therefore
It is necessary to be improved.
Utility model content
The purpose of the utility model is to provide a kind of crescent gear pump radial pressures to compensate interstitial structure, existing to solve
Crescent gear pump can not radial compensation, be easy to appear oil leak, lead to pressure imbalance, so that gear pump be made not transport normally
The problem of turning.
To achieve the above object, the utility model uses following technical scheme:
A kind of crescent gear pump radial pressure compensates interstitial structure, including oil outlet seat board, the oil outlet seat board are in
Arc-shaped, the concave surface of oil outlet seat board and the outer gear ring of gear wheel match, and it is fuel-displaced that the middle part of the oil outlet seat board is equipped with one
Hole, the concave surface middle part of oil outlet seat board are equipped with a pocketed oil chamber, and the internal diameter of the pocketed oil chamber is greater than the internal diameter of oil outlet, oil outlet seat
The two sides on the convex surface of plate are respectively provided with a plunger shaft, and two-piston is intracavitary to be respectively provided with a piston block, and it is O-shaped to be arranged with one on the piston block
Circle, the piston block are connect with plunger shaft close-fitting, are respectively provided with an aperture between the pocketed oil chamber of two-piston chamber and oil outlet seat board.Pressure
During oil, the oil liquid in pumping cavity enters plunger shaft by two sides aperture, and oil liquid pushes up piston outward, while the work in plunger shaft
Effect of the chock by oil pressure generates reaction, inwardly ejects hydraulic fluid port seat board, to make oil outlet seat board is encapsulated to compress greatly
The outer gear ring of gear realizes crescent gear pump radial compensation gap under pressure, thus realize oil outlet seat board with
Zero spacing of outer gear ring of gear wheel cooperates, and forms radial rigidity support, make be always in pump constant flow and constant pressure stabilization shape
State, high lubricating effect, lower noise guarantee the normal operation work of gear pump.
According to the utility model, the width of the oil outlet seat board is equal to or slightly less than canine tooth and takes turns to gear pump outer casing inner wall
Spacing.
According to the utility model, the arc length of the oil outlet seat board is 1/3-the 1/2 of the perimeter of gear wheel.Work as oil outlet
When the arc length of seat board is less than the 1/3 of the perimeter of gear wheel, active force on oil outlet seat board cannot stress completely in gear wheel
On gear ring outer diameter, cause the radial rolling power of gear bigger, ring gear against rotation is unstable, fluctuation is had, so as to cause external gear
With the increased friction between oil outlet seat board, the service life of gear pump is influenced；When the arc length of oil outlet seat board is greater than gear wheel
Perimeter 1/2 when, oil temperature increase, the coefficient of expansion increase, the increased friction between gear and oil outlet seat board, when oil temperature reaches
After certain altitude, it is easy to cause pressure release, influences the normal operation of gear pump.
According to the utility model, the shell of crescent gear pump is equipped with oil outlet, is equipped with an oil outlet on oil outlet
Seat, oil outlet seat are connected to the oil outlet on oil outlet seat board, for the oil liquid in pumping cavity to be exported, the oil outlet seat board
Oil outlet be set on oil outlet seat, and be closely connected with oil outlet seat, prevent oil outlet seat board from moving in gear pump
It is dynamic.
Further, it is arranged with sealing ring on the oil outlet seat, the shell of the sealing ring and crescent gear pump
Oil outlet interference fit connection, so as to form pressure stabilizing state inside crescent gear pump.
According to the utility model, the piston block is nylon piston block, is served high-temperature and high-presure resistent.
The crescent gear pump radial pressure of the utility model compensates interstitial structure, the beneficial effect is that: its structure is simple,
It is economical and practical, the radial pressure compensation of crescent gear pump may be implemented, so that the outer gear ring zero of oil outlet seat board and gear wheel
Spacing cooperation forms radial rigidity support, it is ensured that the stability of flow, pressure guarantees the normal operation of gear pump.Meanwhile it should
The friction of crescent gear pump is small, therefore lower noise.
Detailed description of the invention
Fig. 1 is the longitudinal section cross-sectional view schematic diagram that crescent gear pump radial pressure compensates interstitial structure.
Fig. 2 is the right view schematic diagram that crescent gear pump radial pressure compensates interstitial structure.
Fig. 3 is the top view illustration that crescent gear pump radial pressure compensates interstitial structure and gear pump.
Fig. 4 is the front schematic view of crescent gear pump.
Fig. 5 is the partial sectional view schematic diagram of crescent gear pump.
Specific embodiment
Below in conjunction with specific attached drawing, a kind of crescent gear pump radial pressure compensation interstitial structure of the utility model is made
It is further described.
As shown in Figure 1-Figure 3, interstitial structure is compensated for a kind of crescent gear pump radial pressure of the utility model, including
Oil outlet seat board 1, the oil outlet seat board 1 are arc-shaped, the concave surface of oil outlet seat board 1 and 21 phase of outer gear ring of gear wheel 2
Match, the middle part of the oil outlet seat board 1 is equipped with an oil outlet 11, is equipped with a pocketed oil chamber 12, institute in the middle part of the concave surface of oil outlet seat board 1
The internal diameter for stating pocketed oil chamber 12 is greater than the internal diameter of oil outlet 11, and pocketed oil chamber 12 is connected to oil outlet 11, the convex surface of oil outlet seat board 1
Two sides are respectively provided with a plunger shaft 13, and a piston block 14 is respectively provided in two-piston chamber 13, is arranged with an O-ring on the piston block 14
15, the piston block 14 is closely connect with box with plunger shaft 13, and an aperture 16 is respectively provided between two-piston chamber 13 and pocketed oil chamber 12.
After gear pump work, during pressure oil, after the oil liquid in pocketed oil chamber 12 is full of, the oil liquid of pocketed oil chamber 12 passes through two sides aperture 16
Into plunger shaft 13, oil liquid pushes up piston block 14, while effect of the piston in plunger shaft 13 by oil pressure outward, generates anti-make
With inwardly ejection hydraulic fluid port seat board 1 is nibbled in realization to make the encapsulated outer gear ring 21 for compressing gear wheel 2 of oil outlet seat board 1
Gear pump radial compensation gap under pressure is closed, to realize between oil outlet seat board 1 and the outer gear ring 21 0 of gear wheel 2
Away from cooperation, form radial rigidity support, make be always in pump constant flow and constant pressure stable state, high lubricating effect, noise
It reduces, guarantees the normal operation work of gear pump.
As shown in Figure 4 and Figure 5, the width of the oil outlet seat board 1 is equal to or slightly less than the shell that gear wheel 2 arrives gear pump
The spacing of 3 inner wall.
The arc length of the oil outlet seat board 1 is 1/3-the 1/2 of the perimeter of gear wheel 2.When the arc length of oil outlet seat board 1 is small
When the 1/3 of the perimeter of gear wheel 2, active force on oil outlet seat board 1 cannot gear ring outer diameter of the stress in gear wheel 2 completely
On, cause the radial rolling power of gear bigger, ring gear against rotation is unstable, fluctuation is had, so as to cause gear wheel 2 and oil outlet
Increased friction between seat board 1 influences the service life of gear pump；When the arc length of oil outlet seat board 1 is greater than the perimeter of gear wheel
1/2 when, oil temperature increase, the coefficient of expansion increase, the increased friction between gear wheel 2 and oil outlet seat board 1, when oil temperature reaches one
After determining height, it is easy to cause pressure release, influences the normal operation of gear pump.
As shown in figure 5, the shell 3 of crescent gear pump is equipped with oil outlet, an oil outlet seat is equipped on the oil outlet
4, oil outlet seat 4 is connected to the oil outlet 11 on oil outlet seat board 1, and the oil-through hole 22 in outer gear ring 21 is set to oil outlet seat board
In the middle part of the end face of pocketed oil chamber 12 on 1, for exporting the oil liquid in pumping cavity, oil outlet seat board 1 is flow to from oil-through hole 22
Oil outlet 11, then flow to oil outlet seat 4, the oil outlet 11 of the oil outlet seat board 1 is set on oil outlet seat 4, and with it is fuel-displaced
Mouth seat 4 is closely connected, and prevents oil outlet seat board 1 from moving in gear pump.
Sealing ring 5, the oil outlet of the sealing ring 5 and the shell 3 of crescent gear pump are arranged on the oil outlet seat 4
Interference fit connection, so as to form pressure stabilizing state inside crescent gear pump.
The piston block 14 is nylon piston block, is served high-temperature and high-presure resistent.
The above is only the preferred embodiment of the utility model, it is noted that for the common skill of the art
For art personnel, without departing from the principle of this utility model, several improvements and modifications can also be made.These improve and
Retouching also should be regarded as the protection scope of the utility model.
Claims (6)
1. a kind of crescent gear pump radial pressure compensates interstitial structure, which is characterized in that described fuel-displaced including oil outlet seat board
Mouth seat board is arc-shaped, and the concave surface of oil outlet seat board and the outer gear ring of gear wheel match, and set in the middle part of the oil outlet seat board
There is an oil outlet, a pocketed oil chamber is equipped in the middle part of the concave surface of oil outlet seat board, the internal diameter of the pocketed oil chamber is greater than the internal diameter of oil outlet,
The two sides on the convex surface of oil outlet seat board are respectively provided with a plunger shaft, and two-piston is intracavitary to be respectively provided with a piston block, cover on the piston block
Equipped with an O-ring, the piston block is closely connected with plunger shaft, each between the pocketed oil chamber of two-piston chamber and oil outlet seat board
Equipped with an aperture.
2. crescent gear pump radial pressure as described in claim 1 compensates interstitial structure, which is characterized in that the oil outlet
The width of seat board is equal to or slightly less than the spacing that canine tooth takes turns to gear pump outer casing inner wall.
3. crescent gear pump radial pressure as described in claim 1 compensates interstitial structure, which is characterized in that the oil outlet
The arc length of seat board is 1/3-the 1/2 of the perimeter of gear wheel.
4. crescent gear pump radial pressure as described in claim 1 compensates interstitial structure, which is characterized in that inside engaged gear
The shell of pump is equipped with oil outlet, and an oil outlet seat, the oil outlet on oil outlet seat and oil outlet seat board are equipped on oil outlet
Connection, the oil outlet of the oil outlet seat board is set on oil outlet seat, and is closely connected with oil outlet seat.
5. crescent gear pump radial pressure as claimed in claim 4 compensates interstitial structure, which is characterized in that the oil outlet
Sealing ring is arranged on seat, and the oil outlet of the shell of the sealing ring and crescent gear pump, which is interference fitted, to be connected.
6. crescent gear pump radial pressure as described in any one in claim 1-5 compensates interstitial structure, which is characterized in that institute
Stating piston block is nylon piston block.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920054241.2U CN209687707U (en) | 2019-01-14 | 2019-01-14 | A kind of crescent gear pump radial pressure compensation interstitial structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920054241.2U CN209687707U (en) | 2019-01-14 | 2019-01-14 | A kind of crescent gear pump radial pressure compensation interstitial structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209687707U true CN209687707U (en) | 2019-11-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920054241.2U Active CN209687707U (en) | 2019-01-14 | 2019-01-14 | A kind of crescent gear pump radial pressure compensation interstitial structure |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111125930A (en) * | 2019-12-31 | 2020-05-08 | 安徽工程大学 | End face clearance adjusting method and device of internal gear pump |
| CN117249079A (en) * | 2023-09-25 | 2023-12-19 | 阜新北星液压有限公司 | Noise reduction type gear pump |
-
2019
- 2019-01-14 CN CN201920054241.2U patent/CN209687707U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111125930A (en) * | 2019-12-31 | 2020-05-08 | 安徽工程大学 | End face clearance adjusting method and device of internal gear pump |
| CN117249079A (en) * | 2023-09-25 | 2023-12-19 | 阜新北星液压有限公司 | Noise reduction type gear pump |
| CN117249079B (en) * | 2023-09-25 | 2024-04-26 | 阜新北星液压有限公司 | Noise reduction type gear pump |
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