CN108087266A - A kind of gear pump - Google Patents

Abstract

A new type of gear pump, including a bracket, a pump casing, a safety valve, a driving gear, a driven gear, a sliding bearing, an oil seal and a coupling, has a simple structure and a reasonable design. It adopts split assembly and a horizontal pump body structure design. It is directly connected with the motor through a bracket and a coupling, the installation method is free and flexible, and the space is fully utilized; the one-point continuous contact arc gear transmission is adopted, which completely eliminates the liquid closure caused by the ordinary involute gear in the past. Injection phenomenon; multiple units can be connected to form an oil supply unit, which solves the problems of large space occupied by ship or land oil tank transfer pumps, difficult on-site installation and maintenance, high vibration and noise.

Description

A new type of gear pump

technical field

The invention relates to the field of transporting liquids such as lubricating oil and fuel oil on ships or land, and in particular relates to a novel gear pump.

Background technique

At present, the manufacturing cost of the gear pump is relatively high, and the structure is complex. It is used to transport petroleum products such as gasoline, kerosene, diesel oil, and lubricating oil. The medium temperature is -20°C to +80°C. However, most of the gears on the market are ordinary involute gears, which can easily cause liquid closure during operation, and have performance shortcomings such as loud noise, easy leakage, and high viscosity requirements for the conveying medium, and the structure of the pump body is complex, high in cost, and the motor and pump pass through. Structural defects such as platform installation and large space occupation.

With the development of the ship and land pump industry, customers have put forward higher requirements on the structure, price and installation of the pump on the premise of meeting the performance requirements: 1. The pump is required to adapt to low viscosity, small flow, excellent performance, Running smoothly. 2. The pump is required to completely avoid the phenomenon of liquid closure caused by ordinary involute gears. 3. The pump is required to have a simple structure, low price, and free and flexible installation.

Contents of the invention

In order to solve the above-mentioned problems in the prior art, the present invention provides a new type of gear pump, which has a simple structure and a reasonable design. It adopts split assembly and horizontal pump body structure design, and is directly connected with the motor through a bracket and a coupling. , the installation method is free and flexible, and the space is fully utilized; the one-point continuous contact arc gear transmission is adopted, which completely eliminates the phenomenon of liquid closure caused by the ordinary involute gear in the past; multiple units can be connected to form an oil supply unit, which solves the problem Ship or land oil tank transfer pumps take up a lot of space, difficult to install and maintain on site, high vibration and noise, etc.

In order to achieve the above object, the present invention adopts the following technical solutions: a new type of gear pump, including a bracket, a pump casing, a safety valve, a driving gear, a driven gear, a sliding bearing, an oil seal and a shaft coupling, and the bracket is located on the entire The left side of the device, the left side is connected with the motor, the right side is connected with the pump casing through hexagonal bolts; the left side of the pump casing is connected with the bracket, and the right side is connected with the safety valve through positioning pins and hexagonal bolts; the driving gear and The driven gears mesh with each other and are installed in the pump casing in an up-and-down position; the sliding bearings are divided into upper and lower pairs, the left two are installed in the pump casing, and the right two are installed in the safety valve. The gear shafts at the left and right ends of the driving gear and the driven gear are respectively installed on two pairs of sliding gears; the gear shaft on the left side of the driving gear passes through the sliding bearing and the left side wall of the pump casing and the coupling located in the bracket Connection, an oil seal is set at the connection between the gear shaft and the left side wall of the pump casing; the pump casing is provided with a suction port on the front side corresponding to the driving gear and the driven gear, and a discharge port on the rear side.

Furthermore, the lower end on the left side of the bracket is connected to the support seat, and the support seat is L-shaped, so that the gear pump can be better fixed.

Furthermore, a retaining ring is provided between the oil seal and the left side wall of the pump housing.

Further, the driving gear and the driven gear adopt circular arc gears with one point continuous contact.

Further, the coupling adopts a flexible coupling, including a gear coupling and a motor coupling, an elastic block is arranged between the two couplings, and the gear shaft of the driving gear is coupled with the gear through a key The motor coupling is connected with the motor shaft.

Furthermore, an O-ring is provided between the pump casing and the safety valve to further ensure the tightness of the pump body.

Further, the safety valve includes a safety valve casing, a safety valve cover, a safety valve body, a safety valve spring, a spring cover, an adjusting bolt and a lock nut, and the left side of the safety valve casing is connected to the pump casing through a positioning pin and a hexagon Bolt connection, the front side is provided with a flange and the safety valve cover is connected by hexagonal bolts; a threaded through hole is opened in the middle of the safety valve cover, and the adjusting bolt is installed in the threaded through hole and locked with a lock nut; A suction passage and a discharge passage are respectively arranged in the safety valve casing, the suction passage is connected with the discharge port of the pump casing, the discharge passage is connected with the suction port of the pump casing, and the suction passage and the discharge passage are connected by a pipeline, and the flange The internal channel of the disc is connected with the discharge pipeline; the safety valve body is barrel-like, and the bottom is blocked on the pipeline between the suction channel and the discharge channel, and a safety valve spring is installed inside, and the front end of the safety valve spring is sleeved on the bottom of the spring gland on the protrusion; the adjusting bolt rests on the top of the spring gland.

Furthermore, a groove is provided on the outer circumference of the spring gland, and an O-ring is installed in the groove for sealing.

Furthermore, a channel installation plug is provided between the right side of the safety valve housing and the suction channel, and a channel installation plug is provided between the right side of the safety valve housing and the internal channel of the flange, and the two channels are connected to facilitate future piping.

Furthermore, the top of the pump casing is provided with a channel installation screw plug at the position corresponding to the suction port and the discharge port, and the channel installation screw plug is provided at the connection between the bottom of the pump casing and the sliding bearing, which is convenient for piping in the future.

Compared with prior art, the beneficial effect of the present invention is:

1) The viscosity of the transported liquid can be as low as 2mm ² /s, which can cover almost all the oil liquids currently on the market; the structural design is ingenious, the pump is easy to disassemble and maintain, and the replacement of wearing parts saves time and effort;

2) The one-point continuous contact circular arc gear transmission is adopted, which completely eliminates the phenomenon of liquid closure caused by ordinary involute gears in the past, and realizes the performance characteristics of low noise, low vibration and long life;

3) A layer of high-pressure oil film is formed between the tooth surfaces when the two gears are meshed to avoid the phenomenon of "seizure" and "sintering" that are easy to occur when transporting low-viscosity liquids. At the same time, the operating noise and vibration are reduced, and the operating efficiency of the pump is improved. 80°C;

4) The built-in sliding bearing ensures the stability of the gear pump for long-term operation through the automatic lubrication of the liquid conveyed in the pump;

5) Adopt the latest mechanical seal and oil seal to solve the leakage problem between the gear end face and the end cover;

6) It adopts separate assembly and horizontal pump body structure design, and is directly connected with the motor through brackets and couplings. The installation method is free and flexible, and the space is fully utilized to ensure that the coaxiality of the motor and the pump body is 0.03mm. Below, the rotation speed is 1800min ^-1 , and the runout of the side and end faces of the coupling is below 0.05mm.

Description of drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are some embodiments of the present invention. For those skilled in the art, other drawings can also be obtained according to these drawings on the premise of not being alone in creative work.

Fig. 1 is a structural representation of the present invention;

Fig. 2 is the partial plan view of A place of the present invention;

Fig. 3 is the horizontal sectional view of safety valve of the present invention;

Among them, bracket 1, pump casing 2, safety valve 3, driving gear 4, driven gear 5, sliding bearing 6, oil seal 7, coupling 8, hex bolt 9, positioning pin 10, gear shaft 11, suction port 12 , Discharge port 13, support seat 14, retaining ring 15, gear coupling 16, motor coupling 17, elastic block 18, key 19, O-ring 20, safety valve housing 21, safety valve cover 22, safety valve body 23. Safety valve spring 24, spring gland 25, adjusting bolt 26, lock nut 27, suction passage 28, discharge passage 29, pipe 30, flange inner passage 31, screw plug 32.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

Example 1:

As shown in the figure: a new type of gear pump, including bracket 1, pump casing 2, safety valve 3, driving gear 4, driven gear 5, sliding bearing 6, oil seal 7 and coupling 8, the bracket 1 Located on the left side of the whole device, the left side is connected with the motor, and the right side is connected with the pump casing 2 through the hex bolt 9; the left side of the pump casing 2 is connected with the bracket 1, and the right side is connected with the safety valve 3 through the positioning pin 10 and the hexagonal bolt 9 The bolts 9 are connected; the driving gear 4 and the driven gear 5 are meshed with each other, arranged in the upper and lower positions and installed in the pump casing 2; the sliding bearings 6 are divided into upper and lower pairs, and the two pairs on the left are installed in the pump casing 2 Inside, the two on the right are installed in the safety valve 3, and the gear shafts 11 at the left and right ends of the driving gear 4 and the driven gear 5 are respectively installed on two pairs of sliding gears 6; the gear shafts on the left side of the driving gear 4 11 passes through the sliding bearing 6 and the left side wall of the pump casing 2 to connect with the coupling 8 located in the bracket 1, and an oil seal 7 is arranged at the connection between the gear shaft 11 and the left side wall of the pump casing 2; the pump casing 2 A suction port 12 is provided on the front side corresponding to the driving gear 4 and the driven gear 5, and a discharge port 13 is provided on the rear side.

The left lower end of the bracket 1 is connected to the support seat 14, which is L-shaped, so that the gear pump can be better fixed.

A retaining ring 15 is provided between the oil seal 7 and the left side wall of the pump housing 2 .

The driving gear 4 and the driven gear 5 adopt circular arc gears with one point continuous contact.

The coupling 8 adopts a flexible coupling, including a gear coupling 16 and a motor coupling 17, an elastic block 18 is arranged between the two couplings, and the gear shaft 11 of the driving gear 4 passes through a key 19 It is connected with the gear coupling 16, and the motor coupling 17 is connected with the motor shaft.

An O-ring 20 is provided between the pump casing 2 and the safety valve 3 to further ensure the tightness of the pump body.

The safety valve 3 includes a safety valve housing 21, a safety valve cover 22, a safety valve body 23, a safety valve spring 24, a spring gland 25, an adjusting bolt 26 and a lock nut 27. The left side of the safety valve housing 21 is connected to the pump The shell 2 is connected with the hexagonal bolt 9 through the positioning 10, and a flange is arranged on the front side to connect with the safety valve cover 22 through the hexagonal bolt 9; In the through hole, lock with a lock nut 27; a suction passage 28 and a discharge passage 29 are respectively arranged in the safety valve casing 21, the suction passage 28 is connected with the discharge port 13 of the pump casing 2, and the discharge passage 29 is connected with the pump casing The suction port 12 of 2 is connected, the suction channel 28 is connected with the discharge channel 29 through the pipeline 30, and the inner channel 31 of the flange is connected with the discharge pipeline 29; On the pipeline 30 between the passage 28 and the discharge passage 29, a safety valve spring 24 is installed inside, and the front end of the safety valve spring 24 is sleeved on the bottom protrusion of the spring gland 25; top.

A groove 32 is arranged on the outer circumference of the spring gland 25, and an O-ring 20 is installed in the groove 32 for sealing.

A channel installation plug 32 is provided between the right side of the safety valve housing 21 and the suction channel 28, and a channel installation plug 32 is provided between the flange inner channel 31, and the two channels are connected to facilitate future piping.

The top of the pump casing 2 is provided with a channel installation plug 32 at the position corresponding to the suction port 12 and the discharge port 13, and the channel installation plug 32 is provided at the connection between the bottom and the sliding bearing 6, which is convenient for piping in the future.

When in use, the motor drives the driving gear 4 to rotate through the coupling 8, and then drives the driven gear 5 to rotate. The liquid enters from the suction port 12 and is discharged from the discharge port 13; The pressure of the suction pipe 28 in the valve 3 increases, and the liquid pushes the safety valve body 23 to move forward and compress the safety valve spring 24, so that the suction passage 28 communicates with the discharge passage 29, further makes the liquid flow back, reduces the pressure in the pump, and ensures safety.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: it can still be Modifications are made to the technical solutions described in the foregoing embodiments, or equivalent replacements are made to some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims (10)

1. A novel gear pump, characterized in that it comprises a bracket, a pump casing, a safety valve, a driving gear, a driven gear, a sliding bearing, an oil seal and a shaft coupling, The bracket is located on the left side of the whole device, the left side is connected to the motor, and the right side is connected to the pump casing through hexagonal bolts; The left side of the pump casing is connected to the bracket, and the right side is connected to the safety valve through positioning pins and hexagonal bolts; The driving gear and the driven gear mesh with each other and are arranged in the pump casing in an up-and-down position; The sliding bearings are divided into upper and lower pairs, the two on the left are installed in the pump casing, the two on the right are installed in the safety valve, and the gear shafts at the left and right ends of the driving gear and the driven gear are respectively installed in two pairs. on the sliding gear; The gear shaft on the left side of the driving gear passes through the sliding bearing and the left side wall of the pump casing to connect with the coupling located in the bracket, and an oil seal is arranged at the connection between the gear shaft and the left side wall of the pump casing; A suction port is provided on the front side of the pump casing corresponding to the driving gear and the driven gear, and a discharge port is provided on the rear side. 2. A new type of gear pump according to claim 1, characterized in that: the left lower end of the bracket is connected to a support seat, and the support seat is L-shaped to better fix the gear pump. 3. A new type of gear pump according to claim 1, characterized in that: a retaining ring is provided between the oil seal and the left side wall of the pump housing. 4. A new type of gear pump according to claim 1, characterized in that: said driving gear and driven gear adopt circular arc gears with one point continuous contact. 5. A new type of gear pump according to claim 1, characterized in that: the coupling adopts a flexible coupling, including a gear coupling and a motor coupling, and a The elastic block, the gear shaft of the driving gear is connected with the gear coupling through a key, and the motor coupling is connected with the motor shaft. 6. A new type of gear pump according to claim 1, characterized in that: an O-ring is provided between the pump casing and the safety valve to further ensure the tightness of the pump body. 7. A new type of gear pump according to claim 1, characterized in that: the safety valve includes a safety valve casing, a safety valve cover, a safety valve body, a safety valve spring, a spring gland, an adjusting bolt and a lock nut , The left side of the safety valve casing is connected to the pump casing through positioning pins and hexagonal bolts, and a flange is provided on the front side to connect with the safety valve cover through hexagonal bolts; A threaded through hole is opened in the middle of the safety valve cover, and the adjusting bolt is installed in the threaded through hole and locked with a lock nut; A suction passage and a discharge passage are respectively arranged in the safety valve casing, the suction passage is connected with the discharge port of the pump casing, the discharge passage is connected with the suction port of the pump casing, and the suction passage and the discharge passage are connected by a pipeline, and the flange The inner channel of the disc is connected with the spit out pipeline; The safety valve body is barrel-like, the bottom of which is blocked on the pipeline between the suction passage and the discharge passage, and a safety valve spring is installed inside, and the front end of the safety valve spring is sleeved on the bottom protrusion of the spring gland; the adjustment bolt on top of the spring-loaded cap. 8. A new type of gear pump according to claim 7, wherein a groove is provided on the outer circumference of the spring gland, and an O-ring is installed in the groove for sealing. 9. A new type of gear pump according to claim 7, characterized in that: a channel installation plug is provided between the right side of the safety valve housing and the suction channel, and a channel installation plug is provided between the inner channel of the flange plate , the two channels are connected. 10. A new type of gear pump according to claim 1, characterized in that: the top of the pump casing is provided with a channel installation screw plug at the position corresponding to the suction port and the discharge port, and the channel installation screw plug is provided at the connection between the bottom and the sliding bearing. Blocking.