CN204041373U - Reciprocating four cylinder slurry pump - Google Patents

Abstract

The utility model provides a kind of reciprocal four cylinder slurry pump, comprise four cover simplex pump head systems, flatface follower eccentric wheel type disk cam plunger actuation system and eccentric wheel type cam support and transmission system, often overlap in simplex pump head system and be provided with midge passage, plasma discharge passage, two ball check valves and plunger cavity; Plunger actuation system adopts four cover flatface follower eccentric wheel type disk cam mechanisms, and plunger and flatface follower are connected, and directly drive plunger reciprocates by flatface follower; On four uniform cam support axles be installed in eccentric wheel type cam support and transmission system in 90 °, eccentric wheel type cam interval.The utility model compact structure, lightweight, vibration and noise is low, easy to maintenance, cam support axle stressed little, mechanical efficiency is high, reliability is high, flow and pressure pulsation little.

Description

Reciprocating four cylinder slurry pump

Technical field

The utility model belongs to slurry pump technical field, especially a kind of reciprocating four cylinder slurry pump.

Background technique

Slurry pump is the equipment for slurry transportation, is widely used in the engineerings such as mine, geological drilling, colliery, railway, expressway, water conservancy and hydropower, bridge, tall building, foundation stabilization.Conventional slurry pump is piston type or plunger type, its structure comprises the pump housing and power mechanism, drives crank up by power mechanism, and bent axle drives piston or plunger to move reciprocatingly in cylinder sleeve again, under the alternating action of suction valve and expulsion valve, realize the object of force feed mud.By the classification of piston high-density pump cylinder number, mainly contain several patterns such as single cylinder, twin-tub, three cylinders and five cylinders at present; Classify by the working principle of piston high-density pump driving mechanism, mainly contain hydraulic type and mechanical type two profiles formula at present.

Hydraulic type piston high-density pump adopts hydraulic transmission, hydraulic power unit exports high pressure liquid force feed and enters hydraulic cylinder works chamber, promote piston in hydraulic cylinder, drive hydraulic cylinder piston rod is stretched, motion of contracting, by hydraulic cylinder piston rod Direct driver mud piston or plunger reciprocates, realize suction and the discharge of mud.Hydraulic type piston high-density pump advantage is that structure is simple, volume is little, lightweight, stroke is long, jig frequency is low, the easily damaged parts life-span is long, and shortcoming is that cost is high, price, maintain and replace inconvenient, efficiency is low.

Mechanical type piston high-density pump generally adopts crank or connecting rod of eccentric wheel slide block or plunger mechanism, in order to reduce the wearing and tearing of slide block and Sealing thereof, extra crosshead transmission part is added between connecting rod and slide block transfer route, separately through gear transmission, V belt translation or their combination, by the motion of drive motor and transmission of power to crank or eccentric wheel, drivening rod promotes crosshead and slide block, realizes suction and the discharge of mud.The slurry pump of modern manufacturing has 60 years history nearly, widely uses three cylinder single-acting slurry pumps in engineering, and the defect of triplex mud pump design mainly contains: 1) bent axle or eccentric wheel spring bearing are concentrated by huge moment of flexure and stress, easily crankshaft fatigue fracture occur; 2) the larger flow oscillation existed and pressure surge problem, slurry pump adopts more clutch release slave cylinder can reduce flow oscillation and pressure surge, but according to existing structure, slurry pump volume and weights more than three cylinders is very large, and cost is high, transport is inconvenient; 3) the easily damaged parts life-span is low, mechanical efficiency is low; 4) because load path is long, component is many, and each part stress is unreasonable, causes that volume is large, weight is large.

Model utility content

The cost that the utility model exists for existing hydraulic type slurry pump is high, price, maintain and replace inconvenience, efficiency is low, the volume that mechanical type slurry pump exists is large, weight is large, the easily damaged parts life-span is low, mechanical efficiency is low, flow oscillation and pressure surge larger, the problems such as cam support axle fatiguability fracture, a kind of compact structure is provided, volume is little, lightweight, be convenient to movement, vibration and noise is low, cost is low, easy to maintenance, cam support axle is stressed little, high life, mechanical efficiency is high, reliability is high, flow and the little Novel reciprocating type four cylinder slurry pump of pressure pulsation.

The utility model realizes above-mentioned technical purpose by following technological means.

A kind of reciprocating four cylinder slurry pump, it is characterized in that: comprise four cover simplex pump head systems, flatface follower eccentric wheel type disk cam plunger actuation system and eccentric wheel type cam support and transmission system, described eccentric wheel type cam support and transmission system comprise casing, case lid, cam support axle, bearing (ball) cover, bearing cap, selfaligning roller bearing, mid-bearing cap, key, sleeve, coupling and drive motor, described cam support axle is fixed in the bearing saddle bore of casing, the lower end of cam support axle is connected by coupling with the output shaft of described drive motor, a selfaligning roller bearing is installed at two ends up and down and middle three places of cam support axle respectively, the selfaligning roller bearing outside at two ends is respectively equipped with a bearing cap, middle selfaligning roller bearing outside is provided with mid-bearing cap, described two bearing caps and mid-bearing cap are fixed on casing respectively by stud, bearing (ball) cover is fixed on casing and bearing cap by fillister head screw, sleeve is provided with outside cam support axle, case lid is fixed on casing by fillister head screw,

The plunger cavity of described simplex pump head system is primarily of horizontal cavity and vertical cavity two-part composition, and plunger cavity is fixed on casing by stud; Described flatface follower eccentric wheel type disk cam plunger actuation system mainly comprises four plungers, four flatface followers, four eccentric wheel type cams and four deep groove ball bearings, described four deep groove ball bearings are fixed on cam support axle, are equipped with a sleeve between described deep groove ball bearing and selfaligning roller bearing; Described 90 °, four eccentric wheel type cam intervals are fixed on cam support axle, two eccentric wheel type cams are between the lower end selfaligning roller bearing and middle selfaligning roller bearing of cam support axle and spaced 180 ° and be fixedly connected with by key, two other eccentric wheel type cam is between the upper end selfaligning roller bearing and middle selfaligning roller bearing of cam support axle and spaced 180 ° and be fixedly connected with by key, and in each eccentric wheel type cam outer rim, equal elastic conjunction has a needle bearing; Described flatface follower comprises positioning cylinder shaft part and the middle square frame with slotted hole, the two ends of described square frame have the driving bottom surface perpendicular to square frame, described needle bearing and described driving bottom surface form the secondary surface of contact of rolling friction cam, and described deep groove ball bearing is positioned at described slotted hole; Described plunger is cylindrical structure, the opening end of four plungers is set on the positioning cylinder shaft part of flatface follower, and two straight pins be arranged symmetrically with are set between plunger and flatface follower, bolt is fixedly connected on flatface follower from the left end of plunger through plunger, described plunger extends in the horizontal cavity of plunger cavity from casing, is provided with seal ring and linear bearing between plunger and casing.

Further, the driving bottom surface of described flatface follower is also fixed with liner plate

Further, the outer surface of described needle bearing outer ring has two relative to the plane of axisymmetrical, described plane contacts with the driving bottom surface of flatface follower, and offers static pressure grease chamber at plane place.

Further, described simplex pump head system comprises midge passage, plasma discharge passage, ball check valve, above the vertical cavity of described plunger cavity, below is respectively equipped with a ball check valve, below ball check valve is compressed by midge passage, top ball check valve is compressed by plasma discharge passage, plasma discharge passage and midge passage adopt stud to be fixed on above and below plunger cavity respectively, the midge passage of four cover simplex pump head systems and plasma discharge passage are mutually side by side and intercommunication, described midge passage and plasma discharge passage are all in its both sides, middle three places are provided with into slurry interface and plasma discharge interface, the midge ball check valve of four cover simplex pump head systems, plasma discharge ball check valve and plunger cavity is separate is arranged in juxtaposition.

Further, described ball check valve is made up of ball valve seat, steel ball and ball valve cage, and ball valve seat is face contacts with midge passage, plunger cavity, plasma discharge passage, and ball valve cage adopts and is threadedly connected on ball valve seat, and steel ball is placed on ball valve seat.

Further, described drive motor adopts permanent moment of torsion frequency control motor.

In above-mentioned solution, plunger actuation system adopts four cover flatface follower eccentric wheel type disk cam mechanisms, plunger and flatface follower are connected, directly drive plunger reciprocates by flatface follower, eliminate the intermediateness transition members such as connecting rod, crosshead, gear transmission, make structure simple, compact, volume reduces, weight saving, vibration and noise is low, cost reduces, and mechanical efficiency and reliability increase, all eccentric wheel type cams all, between two selfaligning roller bearings support, reduce the work loads of selfaligning roller bearing and the bending deformation quantity of cam support axle, reduce stress and concentrate, improve the working life of selfaligning roller bearing and cam support axle, in described plunger actuation system, the pressure angle of plunger and flatface follower is 0 ° all the time, force-transfer characteristic is good, consider and can produce couple when the line of action of power produces parallel offset distance with plunger axis, linear bearing and the support of deep groove ball bearing two point is adopted to balance this couple to the entirety that plunger and flatface follower are connected, greatly reduce the lateral support suffered by plunger on the one hand, the deflection avoiding plunger reciprocates process medial axis on the other hand exceeds standard, make the seal ring between plunger and plunger cavity hardly by the frictional force that non-plunger cavity working pressure produces, greatly reduce skin friction and the wear extent of plunger and seal ring thereof, improve the working life of plunger and seal ring thereof, improve mechanical efficiency, reduce user cost.

The beneficial effects of the utility model are: provide a kind of compact structure by adopting above-mentioned every technical solution, volume is little, lightweight, be convenient to movement, vibration and noise is low, cost is low, easy to maintenance, cam support axle stressed little, high life, mechanical efficiency are high, reliability is high, flow and the little Novel reciprocating type four cylinder slurry pump of pressure pulsation.

Accompanying drawing explanation

Fig. 1 is the structural representation of reciprocating four cylinder slurry pump described in the utility model.

Fig. 2 is the plan view after Fig. 1 removes case lid.

Fig. 3 is ball check valve structural representation.

Fig. 4 is plunger, liner plate and flatface follower part assembling drawing.

Fig. 5 is two eccentric wheel type cam connection diagrams.

Fig. 6 is the sectional drawing in A-A face in Fig. 5.

Fig. 7 is needle bearing outer ring structure figure.

Description of reference numerals is as follows:

1-midge passage, 2-ball check valve, 3-plunger cavity, 4-plasma discharge passage, 5-stud, 6-fillister head screw, 7-bolt, 8-plunger, 9-casing, 10-seal ring, 11-linear bearing, 12-liner plate, 13-straight pin, 14-flatface follower, 15-needle bearing, 16-eccentric wheel type cam, 17-deep groove ball bearing, 18-cam support axle, 19-case lid, 20-bearing (ball) cover, 21-bearing cap, 22-selfaligning roller bearing, the mid-bearing cap of 23-, 24-key, 25-sleeve, 26-coupling, 27-drive motor, 28-ball valve seat, 29-steel ball, 30-ball valve cage.

Embodiment

Below in conjunction with accompanying drawing and specific embodiment, the utility model is further described, but protection domain of the present utility model is not limited to this.

Embodiment one:

Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5 and Fig. 6 gives the utility model reciprocating four cylinder mud pump structures, comprise midge passage 1, ball check valve 2, plunger cavity 3, plasma discharge passage 4, stud 5, fillister head screw 6, bolt 7, plunger 8, casing 9, seal ring 10, linear bearing 11, liner plate 12, straight pin 13, flatface follower 14, needle bearing 15, eccentric wheel type cam 16, deep groove ball bearing 17, cam support axle 18, case lid 19, bearing (ball) cover 20, bearing cap 21, selfaligning roller bearing 22, mid-bearing cap 23, key 24, sleeve 25, coupling 26, drive motor 27, ball valve seat 28, steel ball 29, ball valve cage 30.As shown in the figure, cam support axle 18 is fixed in the bearing saddle bore of casing 9, the output shaft of drive motor 27 connects cam support axle 18 by coupling 26 and realizes motion and power input, a selfaligning roller bearing 22 is installed at two ends up and down and middle three places of cam support axle 18 respectively, selfaligning roller bearing 22 outside at two ends is respectively equipped with a bearing cap 21, middle selfaligning roller bearing 22 outside is provided with mid-bearing cap 23, described two bearing caps 21 and mid-bearing cap 23 are fixed on casing 9 respectively by stud 5, bearing (ball) cover 20 is fixed on casing 9 and bearing cap 21 by fillister head screw 6, sleeve 25 is provided with outside cam support axle 18, case lid 19 is fixed on casing 9 by fillister head screw 6.

Simplex pump head system comprises midge passage 1, plasma discharge passage 4, ball check valve 2 and plunger cavity 3, the plunger cavity 3 connecting midge passage 1 and plasma discharge passage 4 is straight-through type, what ensure into plasma discharge is unobstructed, plunger cavity 3 is made up of horizontal cavity and vertical cavity two-part, plunger cavity 3 is fixed on casing 9 by stud 5, above the vertical cavity of plunger cavity 3, below is respectively equipped with a ball check valve 2, below ball check valve 2 is compressed by midge passage 1, top ball check valve 2 is compressed by plasma discharge passage 4, plasma discharge passage 4 and midge passage 1 adopt stud 5 to be fixed on above and below plunger cavity 3 respectively, midge passage 1 and plasma discharge passage 4 are all in its both sides, middle three places are provided with into slurry interface and plasma discharge interface, can according to slurries situation reasonable selection, the midge passage 1 of four cover simplex pump head systems and plasma discharge passage 4 are mutually side by side and intercommunication, ball check valve 2 is by ball valve seat 28, steel ball 29 and ball valve cage 30 form, ball valve seat 28 and midge passage 1, plunger cavity 3, plasma discharge passage 4 is planar annular contact, ball valve cage 30 adopts and is threadedly connected on ball valve seat 28, install, dismounting, it is convenient to change, the midge ball check valve 2 of four cover simplex pump head systems, plasma discharge ball check valve 2 and plunger cavity 3 is separate is arranged in juxtaposition.

Flatface follower eccentric wheel type disk cam plunger actuation system mainly comprises four plungers, 8, four flatface followers, 14, four eccentric wheel type cams 16 and four deep groove ball bearings 17, described four deep groove ball bearings 17 adopt excessively to coordinate and are installed on cam support axle 18, sleeve 25 for the axially locating of deep groove ball bearing 17 and selfaligning roller bearing 22 with fixing, 90 °, four eccentric wheel type cam 16 intervals are installed on cam support axle 18, wherein two eccentric wheel type cams 16 at 180 °, interval all adopt integration manufacture or be fixedly connected with, as shown in Figure 5 and Figure 6, all eccentric wheel type cams 16 are all between two selfaligning roller bearings 22, to be supported by cam support axle 18 and by key 24 transmitting torque, flatface follower 14 comprises positioning cylinder shaft part and the middle square frame with slotted hole, the two ends of square frame have the driving bottom surface perpendicular to square frame, liner plate 12 is fixed on the driving bottom surface of flatface follower 14 by fillister head screw 6, needle bearing 15 adopts interference fit to be installed on to form rolling friction cam in eccentric wheel type cam 16 outer rim and between liner plate 12 secondary, deep groove ball bearing 17 adopts transition fit to be installed on cam support axle 18, and form rolling friction surface of contact between flatface follower 14 and straight line motion support is carried out to flatface follower 14.Plunger 8 is cylindrical structure, the opening end of four plungers 8 is set on the positioning cylinder shaft part of flatface follower 14, and arrange between plunger 8 and flatface follower 14 two straight pins be arranged symmetrically with, 13 pairs of plungers 8 carry out circumference fix, bolt 7 is fixedly connected on flatface follower 14 from the left end of plunger through plunger 8, described plunger 8 extends into from casing 9 in the horizontal cavity of plunger cavity 3, seal ring 10 and linear bearing 11 is provided with between plunger 8 and casing 9, plunger 8 is by forming cylindric pair kinematic mount between linear bearing 11 and casing 9

Above-mentioned reciprocating four cylinder slurry pump plunger actuation systems are flatface follower eccentric wheel type disk cam mechanism, because plunger 8 and flatface follower 14 are connected, therefore eccentric wheel type cam 16 directly drives plunger 8 to-and-fro motion, eliminate the intermediateness transition members such as connecting rod, crosshead, gear transmission, make structure simple, compact, volume reduces, weight saving, vibration and noise is low, cost reduces, and mechanical efficiency and reliability increase, plunger 8 cylindrical structure, adopts bolt 7 to be connected with flatface follower 14, and structure is simple, lightweight, replacing is convenient, low cost of manufacture, adopt linear bearing 11 to form rolling friction between plunger 8 and casing to support, the secondary surface of contact of the cam that flatface follower 14 and eccentric wheel type cam 16 are formed adopts liner plate 12 to form flat rolling friction with needle bearing 15 and contacts, adopt deep groove ball bearing 17 to form rolling friction between flatface follower 14 and cam support axle 18 to support, on the one hand because above-mentioned each relative motion surface all adopts the standard piece such as bearing, Replacement Part designs, high strength need be adopted, high performance material and heat treatment, the part of highi degree of accuracy processing only has plunger 8 and liner plate 12, processing accessories kind is few, process little, processing and working service cost low, frictional force is little on the other hand, wear and tear little, mechanical efficiency is high, long service life, driving mechanism due to plunger 8 is flatface follower formula disk cam mechanism, the pressure angle of plunger 8 and flatface follower 14 one-piece element is 0 ° all the time, force-transfer characteristic is best, consider when the line of action of power produces parallel offset distance with plunger 8 axis, couple can be produced, adopt linear bearing 11 and deep groove ball bearing 17 two point to support to plunger 8 and flatface follower 14 entirety and balance this couple, greatly reduce the lateral support suffered by plunger 8 on the one hand, the deflection avoiding plunger 8 reciprocatory movement medial axis on the other hand exceeds standard, make seal ring 10 hardly by the frictional force that non-plunger cavity 3 working pressure produces, greatly reduce skin friction and the wear extent of plunger 8 and seal ring 10, improve working life and the mechanical efficiency of plunger 8 and seal ring 10, reduce user cost low.

Four eccentric wheel type cams 16 in the eccentric wheel type cam support of above-mentioned reciprocating four cylinder slurry pump and transmission system adopt split trim designs with cam support axle 18, but not adopting the overall manufacturing process such as casting or forging, welding, structure is simple, easy to process, cost of production is low, in four eccentric wheel type cams 16, two eccentric wheel type cams 16 at 180 °, two intervals all adopt integration manufacture or be fixedly connected with, the active force be applied on cam support axle 18 making the eccentric wheel type cam 16 of every two integrations promote to produce when plunger 8 works is always a pair equal and opposite in direction, direction is contrary, the pair of parallel power of conllinear is not couple, also be only by two couple load in cam support axle 18 working procedure, eccentric wheel type cam 16 spacing again due to two integrations is little, even if the reaction force causing single plunger 8 to drive is very large, but the couple load that cam support axle 18 is born is little, thus greatly reduce work loads and the stress of cam support axle 18, improve fatigue strength and the working life of cam support axle 18, again because cam support axle 18 adopts three selfaligning roller bearings 22 to carry out three-point support structure that is middle and two ends layout, all eccentric wheel type cams 16 are all between two selfaligning roller bearings 22 support, reduce the work loads of selfaligning roller bearing 22 and the bending deformation quantity of cam support axle 18, reduce stress to concentrate, improve the working life of selfaligning roller bearing 22 and cam support axle 18.According to energy-saving, emission-reducing, environment friendly requirement, drive motor 27 preferably adopts permanent moment of torsion frequency control motor as driving power source, and under ensureing different plasma discharge flow, plasma discharge maximum design pressure is constant, to adapt to different bore diameter needs.

The each design of part size of above-mentioned reciprocating four cylinder slurry pump is according to slurry pump discharge capacity, pressure size requirements, characteristic of material mechanics and the principle of equal strength carry out miniaturized design, between each component, relative movement space is without the design of interference minimized in size, case lid adopts engineering plastics manufacture, ensure compact structure, volume is little, lightweight, be convenient to movement, the cost of raw material is low.

Above-mentioned reciprocating four cylinder slurry pump are mechanical type four cylinder slurry pump, and each easily damaged parts all adopts the split design of being convenient to install and remove, output flow and pressure pulsation is little, troubleshooting, that easily damaged parts is changed is convenient.

The running of the utility model four cylinder slurry pump is as described below: permanent moment of torsion frequency control motor power is through coupling 26 directly input cam back shaft 18 make it operate, dynamic four flatface followers 14 of rolling friction cam subband that four eccentric wheel type cams 16 on cam support axle 18 pass through to form between the needle bearing 15 of its outer rim and liner plate 12, promote plunger 8 to-and-fro motion in respective plunger cavity 3 be fixedly connected with flatface follower 14, the steel ball sealing one-way valve 2 at midge passage 1 and plasma discharge passage 4 place is is alternately opened and closed, realizes suction mud.Regulated by permanent moment of torsion frequency control motor output speed, realize the adjustment of plasma discharge flow.

Embodiment two:

As shown in Figure 7: present embodiment is from the different of embodiment one, the outer surface of needle bearing 15 outer ring adopts cylndrical surface, plane combination design, and offer static pressure grease chamber (not shown) at plane place, the plane be parallel to each other with the outer surface two of needle bearing 15 outer ring directly coordinates with flatface follower 14 respective planes, formation face contacting fluid hydrostatic lubrication cam is secondary, remove liner plate 12, to be applicable to high-power, heavily loaded applications.

The running of the utility model four cylinder slurry pump is as described below: permanent moment of torsion frequency control motor power is through coupling 26 directly input cam back shaft 18 make it operate, four eccentric wheel type cams 16 on cam support axle 18 drive four flatface followers 14, promote plunger 8 to-and-fro motion in respective plunger cavity 3 be fixedly connected with it, the steel ball sealing one-way valve 2 at midge passage 1 and plasma discharge passage 4 place is is alternately opened and closed, realizes suction mud.Regulated by permanent moment of torsion frequency control motor output speed, realize the adjustment of plasma discharge flow.

Described embodiment is preferred embodiment of the present utility model; but the utility model is not limited to above-mentioned mode of execution; when not deviating from flesh and blood of the present utility model, any apparent improvement that those skilled in the art can make, replacement or modification all belong to protection domain of the present utility model.

Claims (6)

1. reciprocating four cylinder slurry pump, is characterized in that: comprise four cover simplex pump head systems, flatface follower eccentric wheel type disk cam plunger actuation system and eccentric wheel type cam support and transmission system,

Described eccentric wheel type cam support and transmission system comprise casing (9), case lid (19), cam support axle (18), bearing (ball) cover (20), bearing cap (21), selfaligning roller bearing (22), mid-bearing cap (23), key (24), sleeve (25), coupling (26) and drive motor (27), described cam support axle (18) is fixed in the bearing saddle bore of casing (9), the lower end of cam support axle (18) is connected by coupling (26) with the output shaft of described drive motor (27), a selfaligning roller bearing (22) is installed at two ends up and down and middle three places of cam support axle (18) respectively, selfaligning roller bearing (22) outside at two ends is respectively equipped with a bearing cap (21), middle selfaligning roller bearing (22) outside is provided with mid-bearing cap (23), described two bearing caps (21) and mid-bearing cap (23) are fixed on casing (9) respectively by stud (5), bearing (ball) cover (20) is fixed on casing (9) and bearing cap (21) by fillister head screw (6), sleeve (25) is provided with in cam support axle (18) outside, case lid (19) is fixed on casing (9) by fillister head screw (6),

The plunger cavity (3) of described simplex pump head system is primarily of horizontal cavity and vertical cavity two-part composition, and plunger cavity (3) is fixed on casing (9) by stud (5);

Described flatface follower eccentric wheel type disk cam plunger actuation system mainly comprises four plungers (8), four flatface followers (14), four eccentric wheel type cams (16) and four deep groove ball bearings (17), described four deep groove ball bearings (17) are fixed on cam support axle (18), are equipped with a sleeve (25) between described deep groove ball bearing (17) and selfaligning roller bearing (22), described 90 °, four eccentric wheel type cam (16) intervals are fixed on cam support axle (18), two eccentric wheel type cams (16) are positioned between the lower end selfaligning roller bearing (22) of cam support axle (18) and middle selfaligning roller bearing (22), and spaced 180 ° are also fixedly connected with by key (24), two other eccentric wheel type cam (16) is positioned between the upper end selfaligning roller bearing (22) of cam support axle (18) and middle selfaligning roller bearing (22), and spaced 180 ° are also fixedly connected with by key (24), in each eccentric wheel type cam (16) outer rim, equal elastic conjunction has a needle bearing (15), described flatface follower (14) comprises positioning cylinder shaft part and the middle square frame with slotted hole, the two ends of described square frame have the driving bottom surface perpendicular to square frame, described needle bearing (15) and described driving bottom surface form the secondary surface of contact of rolling friction cam, and described deep groove ball bearing (17) is positioned at described slotted hole, described plunger (8) is cylindrical structure, the opening end of four plungers (8) is set on the positioning cylinder shaft part of flatface follower (14), and two straight pins be arranged symmetrically with (13) are set between plunger (8) and flatface follower (14), bolt (7) is fixedly connected on flatface follower (14) from the left end of plunger through plunger (8), described plunger (8) extends in the horizontal cavity of plunger cavity (3) from casing (9), seal ring (10) and linear bearing (11) is provided with between plunger (8) and casing (9).

2. reciprocating four cylinder slurry pump according to claim 1, is characterized in that: the driving bottom surface of described flatface follower (14) is also fixed with liner plate (12).

3. reciprocating four cylinder slurry pump according to claim 1, it is characterized in that: the outer surface of described needle bearing (15) outer ring has two relative to the plane of axisymmetrical, described plane contacts with the driving bottom surface of flatface follower (14), and offers static pressure grease chamber at plane place.

4. reciprocating four cylinder slurry pump according to claim 1, it is characterized in that: described simplex pump head system comprises midge passage (1), plasma discharge passage (4), ball check valve (2), in the top of the vertical cavity of described plunger cavity (3), below is respectively equipped with a ball check valve (2), below ball check valve (2) is compressed by midge passage (1), top ball check valve (2) is compressed by plasma discharge passage (4), plasma discharge passage (4) and midge passage (1) adopt stud (5) to be fixed on above and below plunger cavity (3) respectively, the midge passage (1) of four cover simplex pump head systems and the mutually arranged side by side and intercommunication of plasma discharge passage (4), described midge passage (1) and plasma discharge passage (4) are all in its both sides, middle three places are provided with into slurry interface and plasma discharge interface, the midge ball check valve (2) of four cover simplex pump head systems, plasma discharge ball check valve (2) and plunger cavity (3) is separate is arranged in juxtaposition.

5. reciprocating four cylinder slurry pump according to claim 4, it is characterized in that: described ball check valve (2) is made up of ball valve seat (28), steel ball (29) and ball valve cage (30), described ball valve seat (28) contacts with midge passage (1), plunger cavity (3), plasma discharge passage (4) face of being, ball valve cage (28) adopts and is threadedly connected on ball valve seat (28), and steel ball (29) is placed on ball valve seat (28).

6. reciprocating four cylinder slurry pump according to claim 5, is characterized in that: described drive motor (27) adopts permanent moment of torsion frequency control motor.