CN200961576Y - Linearly conjugated inside engaged gear pump - Google Patents
Linearly conjugated inside engaged gear pump Download PDFInfo
- Publication number
- CN200961576Y CN200961576Y CN 200620041889 CN200620041889U CN200961576Y CN 200961576 Y CN200961576 Y CN 200961576Y CN 200620041889 CN200620041889 CN 200620041889 CN 200620041889 U CN200620041889 U CN 200620041889U CN 200961576 Y CN200961576 Y CN 200961576Y
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- CN
- China
- Prior art keywords
- gear
- pump
- circular
- ring
- ring gear
- Prior art date
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- Expired - Fee Related
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Abstract
The utility model relates to a straight conjugated inner gearing gear pump, comprising a pump body, a pump shaft, a front cover, an oil seal, a bearing and an oil inlet and an oil outlet holes. The utility model is characterized in that a circular pump cavity is arranged inside the pump body; the circular pump cavity is eccentric to the pump shaft; an inner gear ring is disposed inside the circular pump cavity, and the outer ring of the inner gear ring is close to the inner wall of the circular pump cavity; the position on the pump shaft corresponding to the inner gear ring is equipped with a gear, and the gear is meshed with the inner gear ring on one side; a crescent bar is arranged on the interval position of the gear and the inner gear ring, and the external arch face of the crescent bar is coincident with the gear tip of the inner gear ring; and the walls of the circular pump cavities on the two sides of the crescent bar are separately connected with an oil inlet hole and an oil outlet hole. The gear face of the gear is a straight line, and the gear face of the inner gear ring is a straight conjugated line. The utility model has the advantages that a layer of oil film is provided between the inner gear ring and the circular pump cavity, which reduces the abrasion, and simultaneously the gear face of the gear is a straight line, the gear face of the inner gear ring is a straight conjugated line, and the mesh between the gear face of the gear and the gear face of the inner gear ring assumes a smooth contact in the operation, which makes the noise of the pump to be decreased to 70db.
Description
Technical field
The utility model relates to a kind of gear pump, particularly a kind of linear conjugated crescent gear pump.
Background technique
Mostly present employed oil hydraulic pump is various full depth tooth wheel pumps, vane pump, plunger pump; this type of pump is when high-pressure large-displacement; noise is big, the life-span is short, leakage of oil easily; what have can't reach high pressure or big discharge capacity; and in many process equipments, to use oil hydraulic pump; as injection machine is the machinery of indoor continuous use; its noise of stipulating according to National Environment Policy Act must not be above 85 decibels; but about 70% derives from oil hydraulic pump in the overall noise of injection machine, therefore demands the oil hydraulic pump of a kind of big discharge capacity, low noise, high pressure Changshou life in the use of equipment urgently.
Summary of the invention
The purpose of this utility model is that solution oil hydraulic pump of the prior art existing noise when high-pressure large-displacement is big, the life-span short, the problem of easy leakage of oil, and a kind of linear conjugated crescent gear pump that can overcome above-mentioned shortcoming is provided.The utility model designs a kind of linear conjugated crescent gear pump, comprise the pump housing, pump shaft, protecgulum, oil sealing, bearing, oil inlet hole, oil outlet, it is characterized in that: a circular pump chamber is arranged in the pump housing, circular pump chamber is eccentric in pump shaft, one ring gear is arranged in circular pump chamber, paste mutually with the pulsator cavity wall outer ring of ring gear, on pump shaft relatively and the ring gear place gear is arranged, gear is meshed in a side with ring gear, one crescent moon bar is arranged at the interval of gear and ring gear, the outer arch face of crescent moon bar and the crown of ring gear coincide, and the inner concave of crescent moon bar and the crown of gear coincide, and respectively connect oil inlet hole and oil outlet on the circular pump chamber wall of crescent moon bar both sides.The flank of tooth of gear is a straight line, and the flank of tooth of ring gear is linear conjugated line.The utility model has the advantages that in the noise that reduces pump, the high pressure of pump can reach 32Mpa, discharge capacity also reaches 350 liters/minute, and in high-pressure service, between ring gear and the circular pump chamber one deck oil film is arranged, ring gear is actual with circular pump chamber to be not contact, the wearing and tearing that noise also greatly reduces pump have not only been reduced, the flank of tooth that adopts gear simultaneously is a straight line, the flank of tooth of ring gear is linear conjugated line, make on-stream, the flank of tooth of gear presents along sliding contacting with the engagement of the flank of tooth of ring gear, greatly reduces noise, makes the noise of pump be reduced to 70 decibels, be lower than the about 20-30 decibel of common plunger pump, this level of noise has been lower than the noise of the low noise motor that is used for driven pump.
Description of drawings
Accompanying drawing 1 is structural profile schematic representation of the present utility model (being two stage pump among the figure),
Accompanying drawing 2 is the AA generalized section of Fig. 1 of the present utility model,
Below in conjunction with drawings and Examples the utility model is elaborated,
Embodiment
Comprise the pump housing 1 among the figure, pump shaft 2, protecgulum 3, oil sealing 4, bearing 5, oil inlet hole 6, oil outlet 7, it is characterized in that: a circular pump chamber 8 is arranged in the pump housing 1, circular pump chamber 8 is eccentric in pump shaft 2, one ring gear 9 is arranged in circular pump chamber 8, paste mutually with circular pump chamber 8 inwalls the outer ring of ring gear 9, on pump shaft 2 relatively and ring gear 9 places gear 10 is arranged, gear 10 is meshed in nearly pump shaft 2 one sides with ring gear 9, there is a crescent moon bar 11 at interval at gear 10 and ring gear 9, the outer arch face of crescent moon bar 11 and the crown of ring gear 9 coincide, the crown of the inner concave of crescent moon bar 11 and gear 10 coincide, and respectively connects oil inlet hole 6 and oil outlet 7 on the circular pump chamber wall 8 of crescent moon bar 11 both sides.The flank of tooth of gear 10 is a straight line, and the flank of tooth of ring gear 9 is linear conjugated line.
When the pump shaft 2 of pump clockwise rotates, as shown in Figure 2, gear 10 together clockwise rotates with pump shaft 2, and gear 10 drives ring gear 9 and also clockwise rotates, and the cavity volume at nearly oil inlet hole 6 places changes from small to big in the circular pump chamber 8, produce the vacuum oil suction, and when the between cog of gear 10 and ring gear 9 with oil through crescent moon bar 11 after, the cavity volume at nearly oil outlet 7 places in the circular pump chamber 8 produces oil is produced the extruding oil extraction from large to small, finished the one-level pressurization, pressurizeed through secondary more subsequently.General one-level pressurization can reach 12.5Mpa, and secondary is added to 25Mpa, has reduced the pressure difference of every grade of gear pair, has prolonged the working life of pump.
On-stream high pressure, between ring gear 9 and the circular pump chamber 8 one deck oil film is arranged, ring gear 9 and circular pump chamber 8 are actual to be not contact, the wearing and tearing that noise also greatly reduces pump have not only been reduced, the flank of tooth that adopts gear 10 simultaneously is a straight line, the flank of tooth of ring gear 9 is linear conjugated line, make on-stream, the flank of tooth of gear 10 presents along sliding contacting with the engagement of the flank of tooth of ring gear 9, greatly reduce noise, make the noise of pump be reduced to 70 decibels, be lower than the about 20-30 decibel of common plunger pump, this level of noise has been lower than the noise of the low noise motor that is used for driven pump.
Claims (2)
1, a kind of linear conjugated crescent gear pump, comprise the pump housing, pump shaft, protecgulum, oil sealing, bearing, oil inlet hole, oil outlet, it is characterized in that: a circular pump chamber is arranged in the pump housing, circular pump chamber is eccentric in pump shaft, one ring gear is arranged in circular pump chamber, paste mutually with the pulsator cavity wall outer ring of ring gear, on pump shaft relatively and the ring gear place gear is arranged, gear is meshed in a side with ring gear, one crescent moon bar is arranged at the interval of gear and ring gear, the outer arch face of crescent moon bar and the crown of ring gear coincide, and the inner concave of crescent moon bar and the crown of gear coincide, and respectively connect oil inlet hole and oil outlet on the circular pump chamber wall of crescent moon bar both sides.
2, by the described a kind of linear conjugated crescent gear pump of claim 1, it is characterized in that: the flank of tooth of gear is a straight line, and the flank of tooth of ring gear is linear conjugated line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620041889 CN200961576Y (en) | 2006-05-18 | 2006-05-18 | Linearly conjugated inside engaged gear pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620041889 CN200961576Y (en) | 2006-05-18 | 2006-05-18 | Linearly conjugated inside engaged gear pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN200961576Y true CN200961576Y (en) | 2007-10-17 |
Family
ID=38798091
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620041889 Expired - Fee Related CN200961576Y (en) | 2006-05-18 | 2006-05-18 | Linearly conjugated inside engaged gear pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN200961576Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108412758A (en) * | 2018-01-18 | 2018-08-17 | 广东精铟海洋工程股份有限公司 | A kind of low noise crescent gear pump with long service life |
| CN108425837A (en) * | 2018-01-18 | 2018-08-21 | 广东精铟海洋工程股份有限公司 | A kind of crescent gear pump with straight-side profile of low noise |
| CN114718860A (en) * | 2022-03-04 | 2022-07-08 | 浙江凯斯特液压有限公司 | Internal gearing double-linkage booster gear pump |
-
2006
- 2006-05-18 CN CN 200620041889 patent/CN200961576Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108412758A (en) * | 2018-01-18 | 2018-08-17 | 广东精铟海洋工程股份有限公司 | A kind of low noise crescent gear pump with long service life |
| CN108425837A (en) * | 2018-01-18 | 2018-08-21 | 广东精铟海洋工程股份有限公司 | A kind of crescent gear pump with straight-side profile of low noise |
| CN114718860A (en) * | 2022-03-04 | 2022-07-08 | 浙江凯斯特液压有限公司 | Internal gearing double-linkage booster gear pump |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20071017 Termination date: 20120518 |