CN104500363A - Plunger pump with lubricating system - Google Patents

Abstract

A plunger pump with a lubricating system, a lubricating oil gear pump is arranged in the lubricating oil tank at the bottom of the pump body, and the crankshaft is provided with active teeth, the active teeth mesh with the passive teeth on the lubricating oil gear pump, and the lubricating oil gear The oil outlet of the pump is connected with the oil delivery pipeline opened in the inner wall of the pump, the oil delivery pipeline is connected with the oil pipe of the bearing bush, and there is a crankshaft oil pipe in the crankshaft, and this crankshaft oil pipe is connected with the crank throw oil pipe opened in the crank throw. The first double-layer sealing ring is arranged in the plate, and the connecting plate lubricating cavity is between the first double-layer sealing rings. The connecting plate lubricating cavity is connected with the oil pipeline through the connecting plate oil pipe, and the connecting plate lubricating cavity is also connected with a return circuit. The oil pipeline and the outlet of the oil return pipeline are connected with the inner cavity at the bottom of the pump body. A second double-layer sealing ring is arranged in the plunger chamber. Between the second double-layer sealing ring is a plunger lubricating chamber. The cavity lubricating cavity communicates with the oil delivery pipeline through the plunger cavity oil pipe, and the plunger cavity lubricating cavity also communicates with the oil return pipeline.

Description

Piston pump with lubrication system

technical field

The invention relates to a plunger pump, in particular to a plunger pump with a lubricating system.

Background technique

The plunger pump is an important device in the hydraulic system. It relies on the reciprocating movement of the plunger in the cylinder to change the volume of the sealed working chamber to realize oil absorption and oil pressure. The plunger pump has the advantages of high rated pressure, compact structure, high efficiency and convenient flow adjustment, and is widely used in high pressure, large flow and flow adjustment occasions, such as hydraulic presses, engineering machinery and ships. However, since the traditional plunger pump does not involve a supporting lubrication system, once the plunger pump needs to work for a long time, uninterrupted, and at high speed (such as in the field of oil production), the relationship between the plunger and the various parts of the pump body will be due to Various problems are caused by friction, so a new type of plunger pump that can solve the above problems is needed now.

Contents of the invention

The present invention aims to solve the above-mentioned deficiencies in the prior art, and proposes a plunger pump with a lubricating system that is simple in structure, ingenious in design, capable of long-term, uninterrupted high-speed operation, and especially suitable for oil production.

The technical solution of the present invention is: a plunger pump with a lubrication system, including a pump body 1, a crankshaft 3 rotatably supported by a bearing bush 2 is arranged in the inner cavity at the bottom of the pump body 1, and a bell crank 4 is arranged on the crankshaft 3 , crank throw 4 is connected with piston 5 that can move longitudinally in pump body 1, plunger 6 is arranged above piston 5, connecting plate 7, water suction chamber 8, plunger chamber 9 and The water outlet chamber 25, the top of the plunger 6 is located in the plunger chamber 9, which is characterized in that: a lubricating oil gear pump 11 is arranged in the lubricating oil groove 10 at the bottom of the pump body 1, and a lubricating oil gear pump 11 is arranged on the crankshaft 3 The active teeth 12, the active teeth 12 are meshed with the passive teeth 13 on the lubricating oil gear pump 3, the oil outlet of the lubricating oil gear pump 3 is connected to the oil delivery pipeline 14 set in the inner wall of the pump body 1, and the oil delivery pipeline 14 is connected to the bearing bush oil pipe 15 is connected, and the outlet of bearing pad oil pipe 15 is located on the inner surface of bearing pad 2. A crankshaft oil pipe 16 is opened in crankshaft 3. This crankshaft oil pipe 16 is connected with crank throw oil pipe 17 provided in crank throw 4. Located on the outer surface of the crank throw 4, the connecting plate 7 is provided with a first double-layer sealing ring 18, between the first double-layer sealing rings 18 is a connecting plate lubricating chamber 19, and the connecting plate lubricating chamber 19 passes through the connecting plate oil pipe 20 communicates with the oil delivery pipeline 14, and also communicates with the lubricating chamber 19 of the connecting plate with an oil return pipeline 21, the outlet of the oil return pipeline 21 communicates with the inner cavity at the bottom of the pump body 1, and the plunger chamber 9 is provided with The second double-layer sealing ring 22, between the second double-layer sealing ring 22 is a plunger chamber lubricating chamber 23, the plunger chamber lubricating chamber 23 communicates with the oil delivery pipeline 14 through the plunger chamber oil pipe 24, the plunger chamber lubricating chamber 23 It also communicates with the oil return pipeline 21.

Compared with the prior art, the present invention has the following advantages:

The plunger pump with lubrication system of this structure has simple structure, ingenious design and reasonable layout. It aims at the problem that the traditional plunger pump does not have a lubrication system, so it cannot achieve high-intensity, long-term uninterrupted high-speed operation, and cannot meet the working conditions of some special needs (such as the field of oil exploration). The special plunger pump structure of the system, there is lubricating oil between the crankshaft and the bearing bush, between the end of the crank throw and the connecting rod at the bottom of the piston, between the plunger and the part of the pump body in contact with it. Lubrication, so it can work uninterruptedly for a long time, so that its various parts can achieve the best working condition, reduce the chance of damage to parts, and then prolong its service life, and because of the existence of the lubrication system, it can also operate at high speeds Working under the same conditions, the water output per unit time is larger, the energy saving effect is obvious (up to 50%), and because of its friction force is greatly reduced, the power of the motor required is also greatly reduced, thereby reducing the overall energy consumption. Cost of production. Therefore it can be said that it has possessed multiple advantages, and is particularly suitable for popularization and application in this field, and its market prospect is very broad.

Description of drawings

Fig. 1 is a front view of an embodiment of the present invention.

Detailed ways

The specific implementation manner of the present invention will be described below with reference to the accompanying drawings. As shown in Figure 1: a plunger pump with a lubrication system, including a pump body 1, a crankshaft 3 rotatably supported by a bearing bush 2 is arranged in the bottom cavity of the pump body 1, and a bell crank 4 is arranged on the crankshaft 3 , while the bellcrank 4 is connected to the piston 5 that can move longitudinally in the pump body 1, a plunger 6 is arranged above the piston 5, and a connecting plate 7, a water absorption chamber 8, and a plunger chamber 9 are sequentially arranged above the piston 5 and the water outlet chamber 25, and the top of the above-mentioned plunger 6 is located in the plunger chamber 9; when the crankshaft 3 rotates, the plunger 6 reciprocates longitudinally in the pump body 1, and the medium enters the pump body through the water absorption chamber 8 1, and pump out the pump body 1 from the outlet chamber 25 after passing through the plunger chamber 9;

A lubricating oil gear pump 11 is arranged in the lubricating oil tank 10 at the bottom of the pump body 1, and an active tooth 12 is arranged on the crankshaft 3. , the active gear 12 will drive the passive gear 13 to rotate, and then drive the lubricating oil gear pump 3 to start working; the oil outlet of the lubricating oil gear pump 3 is connected to the oil delivery pipeline 14 provided in the inner wall of the pump body 1, and the oil delivery pipeline 14 They are respectively connected with the oil pipe 15 of the bearing bush, the oil pipe 20 of the connecting plate and the oil pipe 24 of the plunger cavity;

The outlet of bearing bush oil pipe 15 is located on the inner surface of bearing bush 2, and crankshaft oil pipe 16 is opened in crankshaft 3. This crankshaft oil pipe 16 is connected with crank throw oil pipe 17 opened in crank throw 4. The outer surface; in this way, the lubricating oil can enter the contact surface of the bearing bush 2 and the crankshaft 3 through the oil pipeline 14 and the bearing bush oil pipe 15, and can also enter the outer surface of the crank throw 4 through the crankshaft oil pipe 16 and the crank throw oil pipe 17. Lubricate the part where the sliding friction is performed; the lubricating oil that completes the lubricating work will directly drop into the lubricating oil tank 10 and return to the circulation of the lubricating oil;

The connecting plate 7 is provided with a first double-layer sealing ring 18, the first double-layer sealing ring 18 is a sealing ring arranged in parallel in two layers, and a connecting plate lubricating cavity 19 is arranged between the two layers of sealing rings, and the connecting plate is lubricated. The cavity 19 communicates with the oil delivery pipeline 14 through the connecting plate oil pipe 20, and is also connected with the connecting plate lubricating cavity 19 to be provided with an oil return pipeline 21, and the outlet of the oil return pipeline 21 communicates with the inner cavity at the bottom of the pump body 1; thus the lubricating oil It can enter the lubricating cavity 19 of the connecting plate through the oil pipeline 14 and the connecting plate oil pipe 20, and evenly spread on the outer surface of the plunger 6 along with the movement of the plunger 6 to achieve lubrication for the movement of the plunger 6. The lubricating oil returns to the inner cavity of the pump body 1 through the oil return pipeline 21;

A second double-layer seal ring 22 is arranged in the plunger chamber 9, and the second double-layer seal ring 22 is a seal ring arranged in parallel in two layers, and a plunger chamber lubricating chamber 23 is arranged between the two layers of seal rings. The lubricating chamber 23 of the plunger chamber communicates with the oil delivery pipeline 14 through the oil pipe 24 of the plunger chamber, and the lubricating chamber 23 of the plunger chamber also communicates with the oil return pipeline 21; The lubricating chamber 23 of the plunger cavity is evenly spread on part of the outer surface of the plunger 6 with the movement of the plunger 6 to achieve lubrication for the movement of the plunger 6, and this part of the lubricating oil returns to the pump through the oil return line 21 in the lumen of body 1.

During the working process of the pump body 1, there is lubricating oil between the crankshaft 3 and the bearing bush 2, between the end of the crank throw 4 and the connecting rod at the bottom of the piston 5, and between the plunger 6 and the part of the pump body 1 that is in contact with it. Lubrication is realized for it, so the pump body of this structure can realize long-term, uninterrupted high-speed work.

Claims (1)

1. A plunger pump with a lubrication system, including a pump body (1), a crankshaft (3) that is rotatably supported by a bearing bush (2) is arranged in the inner cavity at the bottom of the pump body (1), and a crankshaft (3) is arranged on the There is bell crank (4), and bell crank (4) is connected with piston (5) which can move longitudinally in pump body (1). A plunger (6) is arranged above piston (5). The connecting plate (7), the water suction chamber (8), the plunger chamber (9) and the water outlet chamber (25) are arranged in sequence on the top, and the top of the plunger (6) is located in the plunger chamber (9). In that: the lubricating oil tank (10) at the bottom of the pump body (1) is provided with a lubricating oil gear pump (11), and the crankshaft (3) is provided with active teeth (12), and the active teeth (12) and The passive teeth (13) on the lubricating oil gear pump (3) are meshed, and the oil outlet of the lubricating oil gear pump (3) is connected to the oil delivery pipeline (14) provided in the inner wall of the pump body (1), and the oil delivery pipeline (14) ) communicates with the bearing oil pipe (15), and the outlet of the bearing oil pipe (15) is located on the inner surface of the bearing (2), and a crank oil pipe (16) is opened in the crankshaft (3). This crank oil pipe (16) is connected to the crank throw The bell crank oil pipe (17) opened in (4) is connected, the outlet of the bell crank oil pipe (17) is located on the outer surface of the bell crank (4), and the connecting plate (7) is provided with a first double-layer sealing ring ( 18), between the first double-layer sealing rings (18) is the connecting plate lubricating chamber (19), the connecting plate lubricating chamber (19) communicates with the oil pipeline (14) through the connecting plate oil pipe (20), and lubricates with the connecting plate The cavity (19) is also connected with an oil return line (21), the outlet of the oil return line (21) is connected with the inner cavity at the bottom of the pump body (1), and a second The double-layer sealing ring (22), the plunger chamber lubricating chamber (23) between the second double-layer sealing ring (22), the plunger chamber lubricating chamber (23) passes through the plunger chamber oil pipe (24) and the oil pipeline (14 ) are connected, and the plunger lubricating chamber (23) is also connected with the oil return pipeline (21).