CN2425213Y - Closed cycle gear pump - Google Patents
Closed cycle gear pump Download PDFInfo
- Publication number
- CN2425213Y CN2425213Y CN 00215050 CN00215050U CN2425213Y CN 2425213 Y CN2425213 Y CN 2425213Y CN 00215050 CN00215050 CN 00215050 CN 00215050 U CN00215050 U CN 00215050U CN 2425213 Y CN2425213 Y CN 2425213Y
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- Prior art keywords
- oil
- plug
- pump housing
- oil inlet
- valve
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- Expired - Fee Related
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- Details And Applications Of Rotary Liquid Pumps (AREA)
Abstract
The utility model provides a closed type cycle gear pump. The structure of the utility model is that the closed type cycle gear pump is composed of a pump body, a reversal valve for oil charge and oil return, and two one-way pressure limiting overflow valves; the reversal valve for oil charge and oil return is arranged on the upper part of the pump body, the two one-way pressure limiting overflow valves are respectively arranged between an oil chamber A and an oil chamber B of the pump body. The closed type cycle gear pump of the utility model has the advantages of reasonable design, simple structure, easy processing, small size, and convenient use, installation, and maintenance, etc.; moreover, the service life of the equipment can be extended.
Description
The utility model relates to a kind of industrial oil pump, specifically a kind of closed cycle gear pump.
At present, the gear pump that uses on the hydraulic equipment that China produces is unidirectional oil extraction, and work characteristics is open cycle.In use existing deficiency is:
1, can not two-way oil extraction, can't change oil extraction and oil-feed direction according to the variation of forward and reverse rotation of power source (as motor);
2, the conventional tooth wheel pump is owing to be the unidirectional circulation of open type, selector valve just must be installed in control system control the flow direction of oil with the control oil-feed of oil hydraulic cylinder or fuel-displaced, thereby make become huge, structure of equipment become complicated, simultaneously also many binding parts between mutually, increased the installation and maintenance difficulty,, be out of order easily because coupling component is many, thereby increased maintenance expenses, reduced working life;
The purpose of this utility model provide a kind of simple in structure, connecting piece is few, cost is low, the closed cycle gear pump of long service life.
The purpose of this utility model realizes in the following manner, is provided with oil inlet and oil return selector valve and unidirectional pressure limiting relief valve in the pump housing, makes gear pump when the motor sense of rotation changes, and can automatically intrasystem oil be commutated by job requirement; Unidirectional pressure limiting relief valve is set in the pump housing can make equipment more safe and reliable in the utilization and operation process.
Advantage is as follows:
1, because this pump can two-wayly be arranged, oil suction matter, and oil can be exchanged flow direction in the pump circulatory system, rather than traditional oil extraction and oil suction all will pass through fuel tank, thereby the volume of fuel tank is dwindled greatly.
2, because hydraulic oil majority closed cycle in system, rather than be back to fuel tank, thereby oily turbidity test are improved, add that parts such as pipeline, conversion operations the seepage fault occurs and reduce, prolonged the working life of equipment effectively.
3, because unidirectional pressure limiting relief valve and oil inlet and oil return selector valve and the pump housing are designed to one, some coupling member (comprising former control member, electricity, hand control part) under the situation that does not change pump housing discharge capacity and running parameter, have been saved, as long as the sense of rotation of control motor is with regard to the operation of may command hydraulic equipment, institute is so that system operation is more simple and reliable, and equipment manufacturing cost reduces greatly.
4, owing to the minimizing of parts in the hydraulic system, overall volume has fully been dwindled not in dwindling of volume of fuel tank, has reduced installation and maintenance expenses widely, has increased operator's advantages such as work activities space.
Accompanying drawing is the cross-sectional view of closed cycle gear pump.
Explain below with reference to Figure of description closed cycle gear pump of the present utility model being done.
Closed cycle gear pump of the present utility model, its structure are to be made of the pump housing 1, oil inlet and oil return selector valve, unidirectional pressure limiting relief valve, and the oil inlet and oil return selector valve is arranged on the top of the pump housing 1, and two unidirectional pressure limiting relief valves are separately positioned between the A, B grease chamber of the pump housing 1.
The top of oil inlet and oil return selector valve is provided with oil inlet and oil return mouth 2, is provided with Asia shape changeover valve core in age 3 in the oil inlet and oil return selector valve, and the bottom of oil inlet and oil return selector valve is provided with 4,5 and two the oily subaisles 12,13 of turnover in two oily main passages of turnover and communicates with A, the B grease chamber of the pump housing 1 respectively.
Unidirectional pressure limiting relief valve is by plug 6, spring 7, hollow valve plug 8 and open on the pump housing 1 plug holes 9 and form, spring 7 is contained in the hollow valve plug 8, plug 6 is fixed on spring 7 and hollow valve plug 8 on the pump housing among the plug holes 9, have an oil inlet passage 10 that communicates with A, B grease chamber on the top of plug holes 9, have an oil discharge passage 11 that communicates with A, B grease chamber at the middle part of plug holes 9, hollow valve plug 8 is between oil inlet passage 10 and oil discharge passage 11.
Embodiment:
When the motor drives gear pump rotates, the turnover oil A chamber that gear pump is rotated in the forward the pump housing produces negative pressure, the B grease chamber of the pump housing produces malleation, the left end of oil inlet and oil return commutation valve pocket pulls to the left side by pair turnover oilhole with Asia shape in age changeover valve core, B grease chamber in the pump housing is because the rotation of gear pump produces pressure simultaneously, pressure oil flows to the right side of oil inlet and oil return selector valve by pair turnover oilhole, also give inferior shape changeover valve core in age a thrust left simultaneously, make shape changeover valve core position maintenance in inferior age constant, this moment, the A grease chamber of the pump housing communicated with the oil inlet and oil return mouth that fuel tank joins through main oily passage of turnover and turnover oil commutation valve pocket, oil in the fuel tank just can constantly cover the A grease chamber into the pump housing, and satisfied oil flows to compressing into of pump housing B grease chamber.As motor is reversed, the pressure of pump housing A, B two grease chambeies is large and small opposite, and the working principle of gear pump is identical, but the flow direction of oil stream is opposite.
The effect of unidirectional pressure limiting relief valve:
Internal pressure continues to increase when the B grease chamber of the pump housing, and pressure rises, to unidirectional pressure limiting relief valve rated working pressure, hollow valve plug is opened, the oil inlet passage and the oil discharge passage that connect unidirectional pressure limiting relief valve are connected, and oil is sent the A grease chamber of the pump housing back to through oil inlet passage and oil discharge passage, finishes the decompression purpose.
When the motor counterrotating, the working principle in the pump housing is the same, and just the flow direction of oil stream is opposite, and the effect of two unidirectional pressure limiting relief valves is identical.
Its processing and fabricating of closed cycle gear pump of the present utility model is very simple and convenient, and processing and fabricating both can shown in the by specification accompanying drawing.
Closed cycle gear pump of the present utility model is compared with prior art, have reasonable in design, simple in structure, be easy to processing, little, the use of volume and installation and maintenance convenient, can prolong characteristics such as service life of equipment greatly, thereby, have good value for applications.
Except that the described technical characteristics of specification, be the known technology of those skilled in the art.
Claims (3)
1. the closed cycle gear pump comprises the pump housing, oil inlet and oil return selector valve, unidirectional pressure limiting relief valve, it is characterized in that the oil inlet and oil return selector valve is arranged on the top of the pump housing (1), and two unidirectional pressure limiting relief valves are separately positioned between the A, B grease chamber of the pump housing (1).
2. closed cycle gear pump according to claim 1, the top that it is characterized in that the oil inlet and oil return selector valve is provided with oil inlet and oil return mouth (2), be provided with inferior shape changeover valve core in age (3) in the oil inlet and oil return selector valve, the bottom of oil inlet and oil return selector valve is provided with two turnover oily main passages (4), (5) and two turnover oily subaisles (12), (13) and communicates with A, the B grease chamber of the pump housing (1) respectively.
3. closed cycle gear pump according to claim 1, it is characterized in that unidirectional pressure limiting relief valve is by plug (6), spring (7), hollow valve plug (8) and open and go up plug holes (9) at the pump housing (1) and form, spring (7) is contained in the hollow valve plug (8), plug (6) is fixed on spring (7) and hollow valve plug (8) among the plug holes on the pump housing (9), have one and A on the top of plug holes (9), the oil inlet passage that the B grease chamber communicates (10), have one and A at the middle part of plug holes (9), the oil discharge passage that the B grease chamber communicates (11), hollow valve plug (8) are positioned between oil inlet passage (10) and the oil discharge passage (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00215050 CN2425213Y (en) | 2000-06-15 | 2000-06-15 | Closed cycle gear pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00215050 CN2425213Y (en) | 2000-06-15 | 2000-06-15 | Closed cycle gear pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2425213Y true CN2425213Y (en) | 2001-03-28 |
Family
ID=33581061
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00215050 Expired - Fee Related CN2425213Y (en) | 2000-06-15 | 2000-06-15 | Closed cycle gear pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2425213Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101975162A (en) * | 2010-11-11 | 2011-02-16 | 重庆跃进机械厂有限公司 | Valve-group reversing type gear pump |
-
2000
- 2000-06-15 CN CN 00215050 patent/CN2425213Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101975162A (en) * | 2010-11-11 | 2011-02-16 | 重庆跃进机械厂有限公司 | Valve-group reversing type gear pump |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |