CN2199335Y - Nest pump with overflow valve - Google Patents
Nest pump with overflow valve Download PDFInfo
- Publication number
- CN2199335Y CN2199335Y CN 94240714 CN94240714U CN2199335Y CN 2199335 Y CN2199335 Y CN 2199335Y CN 94240714 CN94240714 CN 94240714 CN 94240714 U CN94240714 U CN 94240714U CN 2199335 Y CN2199335 Y CN 2199335Y
- Authority
- CN
- China
- Prior art keywords
- pump
- oil duct
- pressure oil
- overflow valve
- oil passage
- 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.)
- Expired - Fee Related
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- Safety Valves (AREA)
- Details And Applications Of Rotary Liquid Pumps (AREA)
Abstract
The utility model discloses a duplex gear pump with an overflow valve, which is characterized in that the valve body 10 of an overflow valve 13 installed on a back cover 7 is provide with a high pressure oil passage 28-29-30 and a low pressure oil passage 31-32-33. One end of the high pressure oil passage is communicated with the hole 11 of the overflow valve, and the other end of the high pressure oil passage and an oil passage 27 on the back cover 7 are communicated with the oil discharge port 22 of a back pump by the oil passage 21 on one side plate 14. One end of the low pressure oil passage is communicated with the oil return hole 12 of the overflow valve 13, and the other end of the low pressure oil passage and the oil passage 28 of the back cover 7 are communicated with an oil suction port 20 on the side plate 14. The duplex gear pump with an overflow valve is especially suitable for devices which requires compact installation and simultaneously requires different pressure oil sources to use.
Description
The utility model relates to hydraulic element, particularly duplex or multi-gear pump.
The duplex gear pump of using is generally same medium oil at present, the double suction inlet, double outlet, two circuits systems, the head pressure of two pumps is by the relief valve of dress control in addition in the system, cause the hydraulic system complexity, installation and maintenance difficulty, the need of work of incompatibility modern hydraulic systems.
The purpose of this utility model is can be under an oil sources in order to adapt to duplex or nest oil pump, exports two kinds of different pressure and can adjust to propose.The purpose of this utility model is a kind of multi-joint (comprising duplex) gear pump of adorning relief valve of design.
The purpose of this utility model reaches like this.The gear pump of series connection has pump behind a front pump and, is combined as a whole by intermediate.On the bonnet of back pump, a relief valve is arranged.Front pump comprises a driving gear shaft, front pump cover, the preceding pump housing and front pump driven gear axle.Back pump comprises the rear pump driven gear axle, back pump postoperculum, the back pump housing, rear pump driving gear axle.Front pump and back pump are one by the intermediate series connection.The back shaft extension of front pump driving gear axle has spline, by intermediate, be inserted into the rear pump driven gear axle the axle front end splined hole in.A pump shared power in front and back rotates synchronously.On the bonnet of back pump, a fitting seat is arranged, the valve body of a relief valve is installed on this fitting seat.also have on the valve body one to the fitting seat substantially similar fitting seat of back on the pump postoperculum, a high-pressure oil duct and a low pressure oil duct are arranged on the fitting seat of valve body.One end of high-pressure oil duct communicates with the overflow valve opening, the other end and back on the pump postoperculum oil duct and the oil drain out of oil duct on the side plate and back pump communicate.One end of low pressure oil duct communicates with the spill port of relief valve, the back oil road of the other end by the rear pump shell body, through after on the pump side plate oil duct with after inlet port on the pump communicate.
The utility model has the advantages that in the back be provided with relief valve on the pump, thereby the duplex of making or multi-gear pump can be exported the hydraulic oil of two kinds of (or more than) pressure.Duplex pump with series connection is an example, and the front pump output oil pressure is a steady state value, and back pump can be exported the hydraulic oil with the front pump uniform pressure, also can be under the control action of relief valve, and the pressure oil that output is set up arbitrarily less than front pump.Therefore, be particularly suitable for the high-pressure service pump of large-tonnage loader and the multi-way valve system of pilot operated.
Description of drawings, accompanying drawing one is the A-A sectional view that longitudinal sectional view accompanying drawing two of the present utility model is figure one, accompanying drawing three is B-B sectional views of figure one, figure four is C-C sectional views of figure one, figure five is D-D sectional views of figure one, figure six is E-E sectional views of figure one, and figure seven is sectional views of oil duct 21.Each sequence number in the accompanying drawings is: 1 front pump driving gear axle, 2 front pump protecgulums, the 3 preceding pump housings, the 4-5 intermediate, the 6 back pump housings, 7 back pump postoperculums, 8 rear pump driven gear axles, 9 rear pump driving gear axles, 10 overflow valve bodies, 11 overflow valve openings, 12 spill ports, 13 relief valves, 14 side plates, 15 front pump driven gear axles, 16 screws, 17 filler openings, 18 oil drain outs, 19 screws, 20 back Pump Suction Nozzles, 21 side plate oil ducts, 22 back pump oil drain outs, 23 back pump gear axis holes, 24 seal rings, 25 seal grooves, 26 screws, 27 bonnet pressure oilholes, 28-29-30 high-pressure oil duct, 31-32-33 low pressure oil duct, 34 back oil roads.
Describe the utility model in detail below in conjunction with accompanying drawing.
With reference to accompanying drawing, the driving gear shaft 1 of front pump cooperates with driven gear shaft 15, is contained in front pump protecgulum 2, in the front pump that the pump housing 3 and intermediate 4-5 form.The rear end shaft extension of driving gear shaft 1 has a spline, and behind intermediate 4-5, in the splined hole 23 of the front end of the driving gear shaft 8 of pump, the driving gear shaft 8 and the driven gear shaft 9 that drive the back pump together rotate with front pump after being inserted into.The pump housing 6 of back pump, bonnet 7, side plate 14 and intermediate 4-5 constitute the back pump.By screw 16 and 19 series connection, intermediate 4-5 is equivalent to the bonnet of front pump and the protecgulum of back pump by intermediate 4-5 for front pump and back pump.In the rear end of bonnet 7 of back pump, shown in accompanying drawing five, a relief valve 13 is housed by screw 26.The shape of the fitting seat of relief valve 13 and back pump postoperculum 7 is shown in accompanying drawing six.Two oil ducts are arranged, high-pressure oil duct 28-29-30 and low pressure oil duct 31-32-33 on this fitting seat.30 ends of high-pressure oil duct communicate with overflow valve opening 11, and the other end 28 communicates with the oil duct 27 of back on the pump postoperculum 7, oil duct 27 through the oil duct on the side plate 14 21 with after oil drain out 22 UNICOMs on the pump.33 ends of low pressure oil duct communicate with the spill port 12 of relief valve 13, the back oil road 28 of the other end 31 by back pump postoperculum 7 through the oil duct on the side plate 14 20 with after inlet port 20 on the pump communicate.Oil duct 21 on the side plate 14 forms sealing with the oil duct 27 on the bonnet 7 by seal ring 24.
Its working procedure is, configures the delivery pressure of relief valve before the use earlier, and for example, the delivery pressure of front pump is 20MPa, and back pump is that the delivery pressure of relief valve control is 2.5MPa.Driving gear shaft 1 rotates under the drive of power source, drives driven gear shaft 15 rotations, from filler opening 17 oil suctions, from oil outlet 18 head pressure oil; Rear pump driven gear axle 8 drives driven gear shaft 9 rotations, from filler opening 20 oil suctions, from oil outlet 22 head pressure oil by axle 1 transmitting torque.Meanwhile this pressure oil also passes through the oil duct 21 on the side plate 14, and the oil duct 27 on the bonnet 7 enters overflow valve opening 11 to the oil duct 28-29-30 on the overflow valve body 10, realizes according to the pilot pressure output of adjusting.The overflow oil return is through oilhole 12, bonnet 7 upper oil holes 34, and side plate 14 upper oil holes 20 are to oil suction chamber 20.Because the effect of relief valve makes back pump delivery pressure export according to the adjustment pressure control of relief valve.
Claims (1)
1, the multi-gear pump that the dress relief valve of relief valve is arranged on the bonnet of back pump that a kind of front pump and back pump are connected as one by intermediate, front pump comprises driving gear shaft (1), front pump cover (2), the preceding pump housing (3) and front pump driven shaft (15), back pump comprises back pump driving shaft (8), back pump postoperculum (7), the back pump housing (6), back pump driven shaft (9), front pump and back pump are connected by intermediate (4-5), it is characterized in that, a fitting seat that is installed in the end face of back pump postoperculum (7) by screw (26) is arranged on overflow valve body (10), a high-pressure oil duct (28-29-30) is arranged on this seat, with a low pressure oil duct (31-32-33), high-pressure oil duct one end communicates with overflow valve opening (11), oil duct (27) on the other end and back pump postoperculum (7) through the oil duct (21) on the side plate (14) with after the exhaust port (22) of pump communicate, one end of low pressure oil duct communicates with the spill port (12) of relief valve (13), the other end is by the back oil road (28) of back pump postoperculum (7), through the oil duct (21) on the side plate (14) with after suction port (20) on the pump communicate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94240714 CN2199335Y (en) | 1994-06-09 | 1994-06-09 | Nest pump with overflow valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94240714 CN2199335Y (en) | 1994-06-09 | 1994-06-09 | Nest pump with overflow valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2199335Y true CN2199335Y (en) | 1995-05-31 |
Family
ID=33847660
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94240714 Expired - Fee Related CN2199335Y (en) | 1994-06-09 | 1994-06-09 | Nest pump with overflow valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2199335Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102155401A (en) * | 2011-03-26 | 2011-08-17 | 长治液压有限公司 | High-pressure large-flow dual-united gear pump |
| CN102155402A (en) * | 2011-03-26 | 2011-08-17 | 长治液压有限公司 | Double-oil-outlet speed variable gear pump |
| CN108569653A (en) * | 2018-07-12 | 2018-09-25 | 合肥仨力机械制造有限公司 | A kind of fork truck duplex gear pump |
| CN109653868A (en) * | 2019-01-23 | 2019-04-19 | 福建江夏学院 | A kind of high pressure integration pump |
-
1994
- 1994-06-09 CN CN 94240714 patent/CN2199335Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102155401A (en) * | 2011-03-26 | 2011-08-17 | 长治液压有限公司 | High-pressure large-flow dual-united gear pump |
| CN102155402A (en) * | 2011-03-26 | 2011-08-17 | 长治液压有限公司 | Double-oil-outlet speed variable gear pump |
| CN108569653A (en) * | 2018-07-12 | 2018-09-25 | 合肥仨力机械制造有限公司 | A kind of fork truck duplex gear pump |
| CN109653868A (en) * | 2019-01-23 | 2019-04-19 | 福建江夏学院 | A kind of high pressure integration 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 |