CN201236833Y

CN201236833Y - Light slush pump with novel structure

Info

Publication number: CN201236833Y
Application number: CNU2008200298561U
Authority: CN
Inventors: 刘宝钧; 杨礼才
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-07-25
Filing date: 2008-07-25
Publication date: 2009-05-13
Anticipated expiration: 2018-07-25

Abstract

A novel-structured light slime pump comprise a power end and a hydraulic end; the power end is connected with the hydraulic end through a bolt and are fixed together on a base; a main bearing pedestal of the hydraulic end adopts an integrated unit; a main bearing is pressed by a pressing block, a main bearing bolt and a lock nut to form a sealed annular structure inside the main bearing pedestal, so that the forced state of the bearing pedestal is changed, the load-carrying capacity is improved, and the size and the weight of components are reduced; a power input shaft adopts a half shaft which is connected with a small shaft through a bolt to form a power input unit; a crank shaft adopts a casting-forging combined structure of a casting eccentric wheel and a forging core shaft; the sealing of the shaft head of the input shaft adopts the simple-structured mechanical seal, which effectively solve the problem that the input shaft of the conventional slime pump is easy to wear and difficult to replace; a lower value guide device support is added to the hydraulic end; and the lower value guide device support and a hydraulic cylinder adopt cone-surface positioning and overturned assembly and disassembly, so that the problem of difficulty in exchanging the lower valve of the slime pump erect type hydraulic cylinder. The whole machine is characterized by small bulk, low weight, high efficiency, and the weight of the utility model is 60% of the weight of the pump of the same type.

Description

The light-duty slurry pump of new structure

Technical field

The utility model belongs to the mud circulation equipment of an operation such as oil drilling, well workover, completion, is particularly suitable for the use of offshore production platform drilling and repairing well operation.

Background technique

Slurry pump is the capital equipment of the oil-well rig circulatory system, when its function mainly is the oil and gas industry drilling well with slurry transportation in well, be used to cool off drill bit, take landwaste out of.The slurry pump of early stage design all compares heavy, and one 800 horsepowers slurry pump own wt reaches more than 14.5 tons, and this all brings a lot of inconvenience for the manufacturing transportation, and it is stupid, big, stupid, thick that the oil worker gives these equipment qualitative.Tracing it to its cause mainly is the more outmoded backwardness of structural design and technology, and its design deficiency is outstanding to be the following aspects:

1, the slurry pump main bearing seat is the position of the bent axle loading transfer being given the pump frame, usually adopt the split box seat, bearing cap is compressed by two Main bearing bolts, alternate load on the bent axle directly affacts on bearing cap and the Main bearing bolt, the size that need do of bearing support, bearing cap and Main bearing bolt is very big like this, and the member that links to each other with frame also needs to do very heavyly.

2, power input shaft is the axis structure, and the gear of transmitting torque biasing collapses apart from very big, and input shaft is stressed bad, adds the size of large-diameter and block bearing in order to satisfy requirement of strength with regard to needs, causes overall weight to strengthen.

3, bent axle is the main load bearing element of slurry pump, on the bent axle gear, connecting rod and block bearing to be installed, bent axle also is a driving parts the heaviest in the slurry pump, early stage slurry pump bent axle all adopts the integral cast steel manufacturing, and mo(u)lded piece will have defectives such as sand holes, pore, crackle inevitably, and bent axle will bear alternating shock load in addition, in order to satisfy the intensity needs, do the size of bent axle very big, part is very heavy, even the off-axis phenomenon so also often occurs.

4, rubber seal is adopted in the sealing of input shaft spindle nose, and its Sealing is an easily damaged parts, imports spindle nose usually belt pulley and sprocket wheel are installed, and its spindle nose cooperates also tighter, changes very difficulty of once sealing, also will employ loop wheel machine, and execute-in-place gets up more inconvenient.

5, valve guide complex structure under the fluid end of pump, the parts such as device, guider, braking clamp of need taking blame for others make the valve pocket size decreases, and liquid chunnel is obstructed, and dismounting is very inconvenient.

Summary of the invention

The utility model purpose provides the light-duty slurry pump of a kind of new structure, to reduce the volume and weight of slurry pump, improves utilization efficiency.

Specifically, the light-duty slurry pump of new structure, comprise power end and fluid end, power end is connected by bolt with fluid end and is fixed on the base together, as a whole of slurry pump main bearing seat, main bearing are pressed on compact heap, Main bearing bolt and locking nut and form the closed ring structure in the main bearing seat.

The power input shaft of power end is a semiaxis, supports semiaxis in frame with intermediate support, connects a little axle with bolt and constitute the power input shaft assembly on semiaxis.

The bent axle of fluid end adopts fabricated structure, and eccentric wheel adopts the alloyed steel casting, and mandrel adopts alloyed steel to forge, and eccentric wheel is sleeved on the mandrel.

Mechanical seal is adopted in power input shaft spindle nose sealing, and mechanical seal structure designs disc for oil baffle to be set on the Bearing housing of being adorned on the axle between bearing cap and bearing, has oil-return groove on bearing support.

Fluid end increases a following valve guide seat, and following valve guide employing guider seat adds guide sleeve and uses conical surface location and installation at the cylinder cap place of fluid cylinder, and following valve guide seat and fluid cylinder adopt conical surface location, the upset dismounting.

The light-duty slurry pump of the utility model new structure has carried out technological improvement and has reached following beneficial effect in the following aspects:

1, the slurry pump main bearing adopts the closed ring structure, has improved force-bearing situation, has reduced the size and the weight of main bearing seat and Main bearing bolt and correlated parts.

2, power input shaft is a semiaxis, increases supporting in the middle of frame, is used to support semiaxis, connects a little axle with bolt on semiaxis, constitutes the power input shaft assembly.

3, bent axle adopts the casting eccentric wheel to add the casting of forging mandrel and forges fabricated structure, with weight reduction, improves bearing capacity.

4, mechanical seal is adopted in the sealing of input shaft spindle nose, and its structure designs disc for oil baffle to be set on axle sleeve between bearing cap and bearing, have oil-return groove on bearing support.

5, fluid end increases a following valve guide seat, following valve guide seat and fluid cylinder adopt conical surface location, the upset dismounting as long as cylinder cap is pulled down, will descend the valve guide seat to be pulled outwardly with hand when valve is descended in dismounting, following valve just flips out with guider very like a cork, install also easily, from two graph structures, new structure pump liquid chunnel is smooth and easy, the suction resistance is all very little, and the suction efficiency of slurry pump improves greatly like this.

Description of drawings

Fig. 1 is the utility model slurry pump overall structure figure.

Fig. 2 is a conventional mud pump main bearing seat structure schematic representation.

Fig. 3 is the utility model slurry pump main bearing seat structure schematic representation.

Fig. 4 is a conventional mud pump input shaft sectional view.

Fig. 5 is the utility model slurry pump input shaft sectional view.

Fig. 6 is a conventional mud pump crankcase assembly sectional view.

Fig. 7 is the utility model slurry pump crank assemblby sectional view.

Fig. 8 is a conventional mud pump input shaft sealed structural representation.

Fig. 9 is the utility model slurry pump input shaft sealed structural representation.

Figure 10 conventional mud pump hydraulic end sectional view.

Figure 11 the utility model fluid end of pump sectional view.

Figure number explanation: 1-power end, the 2-fluid end, the 3-base, the 4-main bearing seat, 5-main bearing gland, the 6-Main bearing bolt, the 7-main bearing, the 8-compact heap, the 9-axis, the 10-semiaxis, the 11-intermediate support, the little axle of 12-, the 13-connecting rod, the 14-gearwheel, the 15-bent axle, the 16-mandrel, the 17-eccentric wheel, the 18-bearing support, the 19-bearing cap, the 20-axle sleeve, the 21-rubber seal, the 22-oil-return groove, the 23-oil nozzle, the 24-disc, the 25-oil baffle, the 26-cylinder sleeve, the 27-liquid chunnel, the 28-fluid cylinder, the last valve assembly of 29-, the 30-device of taking blame for others, the 31-stop, valve guide under the 32-, valve assembly under the 33-, the 34-suction port, valve guide seat under the 35-.

Embodiment

Fig. 1,3,5,7,9,11 has provided the utility model embodiment.The light-duty slurry pump of new structure, comprise power end 1 and fluid end 2, power end 1 is connected by bolt with fluid end 2 and is fixed on together on the base 3,4 as a whole of slurry pump main bearing seats, main bearing are pressed on compact heap 8, Main bearing bolt 6 and locking nut and form the closed ring structure in the main bearing seat 4.The power input shaft of power end 1 is a semiaxis 10,, connects a little axle 12 with bolt and constitute the power input shaft assembly on semiaxis 10 with intermediate support 11 supporting semiaxis 10 in frame.Mechanical seal is adopted in power input shaft spindle nose sealing, and mechanical seal structure designs disc 24 for oil baffle 25 to be set on the Bearing housing of being adorned on the axle between bearing cap 19 and bearing, has oil-return groove 22 on bearing support.

The bent axle 15 of fluid end 2 adopts fabricated structure, and eccentric wheel 17 adopts the alloyed steel casting, and mandrel 16 adopts alloyed steel to forge, and eccentric wheel 17 is sleeved on the mandrel (16).Fluid end increases a following valve guide seat 35, and following valve guide 32 employing guider seats add guide sleeve and use conical surface location and installation at cylinder cap 26 places of fluid cylinder, and following valve guide seat 35 adopts conical surface location with fluid cylinder 28, the dismounting of overturning.The utility model has mainly been done following improvement to slurry pump:

1, the slurry pump main bearing seat is the position of the bent axle loading transfer being given the pump frame, general slurry pump adopts the split box seat, bearing cap is compressed by two Main bearing bolts, alternate load on the bent axle directly affacts on bearing cap and the Main bearing bolt, the size that need do of bearing support, bearing cap and Main bearing bolt is very big like this, and the member that links to each other with frame also needs to do very heavyly.The utility model slurry pump main bearing seat is designed to an integral ring-shaped bearing support, and a breach that is used for the dismounting axle is arranged on the annular seating, fills with a compact heap, by a bolts compact heap and bearing support is connected, and bolt only plays anastomosis, not bearing load.This closed ring structure has been improved the force-bearing situation of main bearing seat and Main bearing bolt greatly, has reduced the size and the weight of main bearing seat and Main bearing bolt and associated part.

2, input shaft is the slurry pump power input shaft, the left end spindle nose is installed sprocket wheel, belt pulley or coupling, right-hand member band lubricating pump or water pump, small gear on the axle and bent axle gearwheel engagement transferring power, conventional mud pump input shaft is an axis, length is 2200～2600mm, also processes herringbone gear on the axle, and manufacture difficulty is big, cost is also very high, and the gear biasing collapses apart from bigger, stressed bad.New structure increases intermediate support for axis being changed into semiaxis, and the right connects a little axle, drives lubricating pump, and this structure has been improved the stress of input shaft greatly, and axial length reduces 1000mm, and difficulty of processing reduces, and manufacture cost reduces.

3, the conventional mud pump crankcase all adopts the integral cast steel manufacturing, mo(u)lded piece will have defectives such as sand holes, pore, crackle inevitably, and bent axle will bear alternating shock load in addition, in order to satisfy the intensity needs, to do the size of bent axle very big, even the off-axis phenomenon so also often occurs.The utility model slurry pump bent axle adopts fabricated structure, eccentric wheel adopts the alloyed steel casting, mandrel adopts alloyed steel to forge, the mandrel that forges after heat treatment has the mechanical property more much higher than foundry goods, there is not fault in material yet, therefore the diameter of axle can be reduced, alleviate weight, improve bearing capacity.

4, input shaft spindle nose sealing, old structure adopts rubber seal, and its Sealing is an easily damaged parts, usually the input spindle nose is equipped with belt pulley and sprocket wheel, and its spindle nose cooperates also tighter, changes very difficulty of once sealing, also will employ loop wheel machine, execute-in-place gets up more inconvenient.New structure adopts oil baffle to add the disc structure, a large amount of lubricant oil are blocked by oil baffle, and a small amount of oil is thrown to oil-return groove through disc, returns fuel tank, solved the spindle nose sealing problem of pressure lubrication effectively, new structure has thoroughly solved the spindle nose sealing and has changed difficult problem.

5, slurry pump erect type fluid end sucks and discharges valve pocket on same center line, changes valve difficulty down.Shown in Figure 10 conventional mud pump hydraulic end sectional view, cylinder sleeve is pushed down cylinder sleeve by pack into the device of need taking blame for others of front, and valve guide will be pressed into by hole under the device of taking blame for others down, and rotate and made down the wing plate of valve guide be stuck in the below of the device of taking blame for others in 1/4 week, and stop need be installed, pin valve guide down, this structure one has stopped that the intake flow passage makes water resistance increasing on the slurry pump, and two come dismounting very inconvenient, and it is serious that especially pump uses back mud corrosion, be difficult to dismounting, this is a big shortcoming of upright pump head, but this new pump has changed its structural type dexterously, and cylinder sleeve is packed into by the back, increase a following valve guide bearing, guider bearing and housing adopt conical surface location, upset dismounting, dismounting down during valve as long as cylinder cap is pulled down, to descend the valve guide seat to be pulled outwardly with hand, following valve just flips out with guider very like a cork, installs also easily, sees that from two graph structures the pump liquid chunnel is also very smooth and easy, the suction resistance is all very little, and the water-horse power efficient of slurry pump improves greatly like this.

More than every be the main improvement part of the utility model slurry pump, remaining part and existing slurry pump are basic identical, no longer describe here.

Claims

1, the light-duty slurry pump of new structure, comprise power end (1) and fluid end (2), power end (1) is connected by bolt with fluid end (2) and is fixed on together on the base (3), it is characterized in that as a whole of slurry pump main bearing seat (4), main bearing is pressed on compact heap (8), Main bearing bolt (6) and locking nut and forms the closed ring structure in the main bearing seat (4).

2, the light-duty slurry pump of new structure according to claim 1, the power input shaft that it is characterized in that power end (1) is semiaxis (10),, upward connect a little axle (12) at semiaxis (10) and constitute the power input shaft assembly with intermediate support (11) supporting semiaxis (10) in frame with bolt.

3, the light-duty slurry pump of new structure according to claim 1, the bent axle (15) that it is characterized in that fluid end (2) adopts fabricated structure, eccentric wheel (17) adopts the alloyed steel casting, and mandrel (16) adopts alloyed steel to forge, and eccentric wheel (17) is sleeved on the mandrel (16).

4, the light-duty slurry pump of new structure according to claim 2, it is characterized in that power input shaft spindle nose sealing employing mechanical seal, and mechanical seal structure is for being provided with oil baffle (25) between bearing cap (19) and bearing, on the Bearing housing of being adorned on the axle, design disc (24), on bearing support, have oil-return groove (22).

5, according to claim 1 or the light-duty slurry pump of 3 described new structures, it is characterized in that fluid end increases a following valve guide seat (35), following valve guide (32) adopts the guider seat to add guide sleeve and locates at the cylinder cap (26) of fluid cylinder with conical surface location and installation, following valve guide seat (35) adopts conical surface location with fluid cylinder (28), the upset dismounting.