High-temperature-resistant plunger sleeve

Abstract

The utility model discloses a high-temperature-resistant plunger sleeve which comprises a plunger rod, a high-temperature-resistant pad, a heat absorption pad, a groove, cooling fins, a plunger sleeve inner shell, a cooling pipeline, an inserting rod, a plunger sleeve outer shell and an inserting hole, the high-temperature-resistant pad is movably installed on the outer wall of the plunger rod, and the heat absorption pad is installed on the outer wall of the high-temperature-resistant pad. A plurality of grooves are formed in the outer side wall of the heat absorption pad, a cooling fin is embedded in each groove, a plunger sleeve inner shell is movably installed on the outer wall of the heat absorption pad, a cooling pipeline is installed on the inner side wall of the plunger sleeve inner shell, and the cooling pipeline is arranged in a spiral shape; a water inlet of the cooling pipeline is connected with an external water inlet pipe, a plurality of inserting rods are arranged on the outer side wall of the plunger sleeve inner shell, a plurality of inserting holes matched with the inserting rods are formed in the side wall of the plunger sleeve outer shell, the plunger sleeve can be effectively cooled, and then the service life of the plunger sleeve is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of plunger pumps, in particular to the technical field of a high-temperature resistant plunger sleeve. Background Art

[0002] The injection pump plunger pair refers to the paired plunger and plunger sleeve, and is one of the three major precision pairs of parts in the diesel engine fuel system. Under the action of the oil pump cam, the plunger reciprocates at high speed in the plunger sleeve, pressurizing the fuel to a certain pressure and starting to pressurize or drain the fuel within a specified time. The diesel engine's fuel supply system is called a high-pressure fuel pump, also known as an injector. Its power comes from the engine itself. The injection pump's oil suction and oil compression are completed by the reciprocating motion of the plunger in the plunger sleeve.

[0003] The existing plunger sleeve is provided with a flange at the top for installation, but due to the large size and weight of the plunger sleeve, the positioning and guiding before installation is very inconvenient, which brings great trouble to the installation; at the same time, a center hole is provided in the middle of the plunger sleeve body, and the center hole is divided into an injection section and a plunger mounting section. The plunger mounting section is larger than the injection section, but the injection pressure is low.

[0004] In order to solve the problems raised in the background technology, for example, application number CN201521010112.1 discloses a plunger sleeve, comprising a plunger sleeve body, an axially through-hole is provided on the plunger sleeve body, a flange mounting plate is provided on the top of the plunger sleeve body, and four bolt mounting holes are evenly distributed on the circumference, characterized in that: the top of the plunger sleeve body extends upward to form a positioning cone, and the top of the positioning cone is provided with two positioning pin insertion holes, the positioning cone is inserted into the positioning hole of the corresponding device, and the positioning pin on the corresponding device is inserted into the positioning pin insertion hole, and after precise positioning, the plunger sleeve is installed on the corresponding device by bolts, and the installation is very convenient and quick; a closing section is added, and the diameters of the plunger mounting section, the injection section, and the closing section are limited to decrease in sequence, thereby increasing the injection pressure, but this structure still has the following defects:

[0005] Since the plunger rod generates a huge friction force during the reciprocating motion in the plunger sleeve, the heat rises sharply, and the structure lacks a heat dissipation structure, which in turn causes damage to the plunger sleeve.

[0006] In order to solve the problems raised in the above-mentioned technology, for example, application number CN202121011281.2 discloses a high-temperature resistant plunger sleeve, comprising an upper section of a body, a middle section of a body and a lower section of a body, wherein a C-shaped groove is provided at the upper end of the middle section of the body, a center hole is provided on the middle section of the body, and an annular groove is provided at the lower end of the middle section of the body. The lower end of the C-shaped groove is connected to the annular groove through a plurality of channels I provided on the middle section of the body, and a channel II is provided on the middle section of the body, the lower end of which is connected to the annular groove. The upper end of the channel II passes through the upper end of the middle section of the body, and the upper end of the middle section of the body is provided with an upper section of the body, and the upper section of the body is provided with an inlet and an outlet respectively connected to the C-shaped groove and the channel II, so as to realize cooling of the plunger sleeve by flowing cooling medium. However, this structure still has the following defects:

[0007] Although this structure uses annular grooves and channels to cool the plunger sleeve by flowing cooling medium, the plunger rod generates high heat during reciprocating motion, and the plunger sleeve cannot be effectively cooled by the cooling medium alone. After a long time, it is still prone to damage. Summary of the Invention

[0008] The purpose of the utility model is to solve the problems in the prior art and to provide a high-temperature resistant plunger sleeve, which can effectively cool the plunger sleeve and thus extend the service life of the plunger sleeve.

[0009] To achieve the above-mentioned purpose, the utility model proposes a high-temperature resistant plunger sleeve, comprising a plunger rod, a high-temperature resistant pad, a heat-absorbing pad, a groove, a heat sink, a plunger sleeve inner shell, a cooling pipe, a rod, a plunger sleeve outer shell, and a socket. The outer wall of the plunger rod is movably mounted with a high-temperature resistant pad, the outer wall of the high-temperature resistant pad is mounted with a heat-absorbing pad, the outer wall of the heat-absorbing pad is provided with a plurality of grooves, the interior of each of the grooves is embedded with a heat sink, the outer wall of the heat-absorbing pad is movably mounted with a plunger sleeve inner shell, the inner side wall of the plunger sleeve inner shell is provided with a cooling pipe, the cooling pipe is spirally arranged, and the water inlet of the cooling pipe is connected to the external water inlet pipe, the outer side wall of the plunger sleeve inner shell is provided with a plurality of rods, the side wall of the plunger sleeve outer shell is provided with a plurality of sockets adapted to the rods, the plunger sleeve inner shell is inserted into the socket through the rods to form an installation with the plunger sleeve outer shell.

[0010] Preferably, the high temperature resistant pad is one of a titanium carbide high temperature resistant pad, a silicon carbide high temperature resistant pad, a silicone rubber high temperature resistant pad, a fluororubber high temperature resistant pad, a silicon nitride high temperature resistant pad or a polyimide high temperature resistant pad.

[0011] Preferably, the heat absorbing pad is one of a graphite heat absorbing pad, an expanded polystyrene heat absorbing pad, a polyurethane heat absorbing pad or a hard polyurethane heat absorbing pad.

[0012] Preferably, a plurality of exhaust channels are provided on the outer side wall of the heat absorbing pad, one end of each exhaust channel is communicated with the groove, and the other end of each exhaust channel extends outward.

[0013] Preferably, each of the insertion rods is provided with a hole, and the upper and lower ends of the plunger sleeve shell are provided with a plurality of circular holes adapted to the holes.

[0014] Preferably, the upper and lower ends of the plunger sleeve housing are equipped with locking bolts, and the ends of the locking bolts are inserted into the circular hole and the hole in sequence.

[0015] Beneficial effects of the utility model:

[0016] 1. The utility model can effectively cool the plunger sleeve by using the high-temperature resistant pad, heat-absorbing pad, heat sink and cooling pipe in combination. When the plunger rod generates high heat during the reciprocating motion, the high-temperature resistant pad can isolate part of the heat, thereby preventing all the heat from being transferred to the plunger sleeve, while the heat-absorbing pad will absorb the other part of the high-temperature heat and dissipate the heat through the heat sink, so that the hot air emitted by the heat sink can be discharged to the outside through the exhaust channel, thereby achieving the purpose of heat dissipation. At the same time, cooling water is injected into the cooling pipe, which can further cool the plunger sleeve, thereby ensuring the durability of the plunger sleeve and solving the problem that the plunger sleeve cannot be effectively cooled by the cooling medium alone and is still prone to damage after a long time.

[0017] 2. The utility model can lock the plunger sleeve by cooperating with the insertion rod, the insertion hole, the hole, the round hole and the locking bolt. After the insertion rod on the inner shell of the plunger sleeve is inserted into the insertion hole on the outer shell of the plunger sleeve, the locking bolt is inserted into the round hole on the outer shell of the plunger sleeve and the hole on the insertion rod in sequence, and then the locking bolt is tightened by a tool to complete the locking of the insertion rod, thereby ensuring the firmness of the plunger sleeve during use and improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a front view of a high temperature resistant plunger sleeve of the utility model;

[0019] Figure 2 This is an exploded view of a high-temperature resistant plunger sleeve of the utility model;

[0020] Figure 3 This is an enlarged schematic diagram of the exhaust passage of a high-temperature resistant plunger sleeve of the utility model;

[0021] Figure 4 This is a cross-sectional view of the inner shell of a high-temperature resistant plunger sleeve of the utility model;

[0022] In the figure: 1- plunger rod, 2- high temperature resistant pad, 3- heat absorbing pad, 4- groove, 5- heat sink, 6- plunger sleeve inner shell, 7- cooling pipe, 8- plug rod, 9- plunger sleeve outer shell, 10- plug hole, 11- exhaust channel, 12- hole, 13- round hole, 14- locking bolt. DETAILED DESCRIPTION

[0023] See Figures 1 to 4 The utility model is a high temperature resistant plunger sleeve, comprising a plunger rod 1, a high temperature resistant pad 2, a heat absorbing pad 3, a groove 4, a heat sink 5, a plunger sleeve inner shell 6, a cooling pipe 7, an insert rod 8, a plunger sleeve outer shell 9, and a socket 10. The outer wall of the plunger rod 1 is movably mounted with a high temperature resistant pad 2, and the outer wall of the high temperature resistant pad 2 is mounted with a heat absorbing pad 3. The outer wall of the heat absorbing pad 3 is provided with a plurality of grooves 4, and each groove 4 is embedded with a heat sink 5. The heat absorbing pad 3 is provided with a plurality of grooves 4. A plunger sleeve inner shell 6 is movably installed on the outer wall, and a cooling pipe 7 is installed on the inner wall of the plunger sleeve inner shell 6. The cooling pipe 7 is spirally arranged, and the water inlet of the cooling pipe 7 is connected to the external water inlet pipe. The outer wall of the plunger sleeve inner shell 6 is provided with a plurality of plug rods 8, and the side wall of the plunger sleeve outer shell 9 is provided with a plurality of sockets 10 adapted to the plug rods 8. The plunger sleeve inner shell 6 is inserted into the sockets 10 through the plug rods 8 to form an installation with the plunger sleeve outer shell 9.

[0024] See Figure 1 and Figure 2 The utility model provides a high-temperature resistant plunger sleeve. The high-temperature resistant pad 2 adopts one of the following: titanium carbide high-temperature resistant pad, silicon carbide high-temperature resistant pad, silicone rubber high-temperature resistant pad, fluororubber high-temperature resistant pad, silicon nitride high-temperature resistant pad or polyimide high-temperature resistant pad. The high-temperature resistant pad 2 has the function of isolating part of the heat, thereby preventing all the heat from being transferred to the plunger sleeve.

[0025] See Figure 1 and Figure 2 The utility model provides a high-temperature resistant plunger sleeve. The heat absorbing pad 3 adopts one of the following materials: graphite heat absorbing pad, expanded polystyrene heat absorbing pad, polyurethane heat absorbing pad or hard polyurethane heat absorbing pad. The heat absorbing pad 3 has the function of absorbing the high-temperature heat of another part, thereby reducing heat accumulation.

[0026] See Figure 3The utility model is a high-temperature resistant plunger sleeve. The outer wall of the heat-absorbing pad 3 is provided with a plurality of exhaust channels 11. One end of each exhaust channel 11 is communicated with the groove 4, and the other end of each exhaust channel 11 extends outward. The heat sink 5 has the function of heat dissipation, so that the hot air dissipated by the heat sink 5 can be discharged outward through the exhaust channel 11, thereby achieving the purpose of heat dissipation.

[0027] See Figure 2 The utility model provides a high-temperature resistant plunger sleeve, each of which is provided with a hole 12, and the upper and lower ends of the plunger sleeve shell 9 are provided with a plurality of circular holes 13 that are compatible with the holes 12. The upper and lower ends of the plunger sleeve shell 9 are equipped with locking bolts 14, and the ends of the locking bolts 14 are inserted into the circular holes 13 and the holes 12 in turn. After the plunger sleeve inner shell 6 is inserted into the insertion hole 10 on the plunger sleeve shell 9, the locking bolts 14 are inserted into the circular holes 13 on the plunger sleeve shell 9 and the holes 12 on the plunger 8 in turn, and then the locking bolts 14 are tightened by a tool to complete the locking of the plunger 8, thereby ensuring the firmness of the plunger sleeve during use and improving work efficiency.

[0028] Working process of this utility model:

[0029] The utility model provides a high-temperature resistant plunger sleeve. During operation, when the plunger rod 1 generates high heat during the reciprocating motion, the high-temperature resistant pad 2 can isolate part of the heat, thereby preventing all the heat from being transferred to the plunger sleeve, and the heat-absorbing pad 3 absorbs the other part of the high-temperature heat and dissipates the heat through the heat sink 5, so that the hot air emitted by the heat sink 5 can be discharged to the outside through the exhaust channel 11, thereby achieving the purpose of heat dissipation, and at the same time, cooling water is injected into the cooling pipe 7, which can further cool the plunger sleeve, thereby ensuring the durability of the plunger sleeve.

[0030] After inserting the insertion rod 8 on the plunger sleeve inner shell 6 into the insertion hole 10 on the plunger sleeve outer shell 9, the locking bolt 14 is inserted into the circular hole 13 on the plunger sleeve outer shell 9 and the hole 12 on the insertion rod 8 in sequence, and then the locking bolt 14 is tightened by a tool to complete the locking of the insertion rod 8, thereby ensuring the firmness of the plunger sleeve during use and improving work efficiency.

[0031] The above embodiments are intended to illustrate the present invention, not to limit the present invention. Any solution that is a simple transformation of the present invention falls within the scope of protection of the present invention.

Claims

1. A high temperature resistant plunger sleeve, characterized in that: The invention comprises a plunger rod (1), a high temperature resistant pad (2), a heat absorbing pad (3), a groove (4), a heat sink (5), an inner shell of a plunger sleeve (6), a cooling pipe (7), an insert rod (8), an outer shell of a plunger sleeve (9), and a socket (10). The outer wall of the plunger rod (1) is movably mounted with a high temperature resistant pad (2), the outer wall of the high temperature resistant pad (2) is mounted with a heat absorbing pad (3), the outer wall of the heat absorbing pad (3) is provided with a plurality of grooves (4), the interior of each groove (4) is embedded with a heat sink (5), and the outer wall of the heat absorbing pad (3) is provided with a plurality of grooves (4). A plunger sleeve inner shell (6) is movably installed, and a cooling pipe (7) is installed on the inner side wall of the plunger sleeve inner shell (6). The cooling pipe (7) is spirally arranged, and the water inlet of the cooling pipe (7) is connected to the external water inlet pipe. The outer side wall of the plunger sleeve inner shell (6) is provided with a plurality of plug rods (8), and the side wall of the plunger sleeve outer shell (9) is provided with a plurality of sockets (10) adapted to the plug rods (8). The plunger sleeve inner shell (6) is inserted into the sockets (10) through the plug rods (8) to form an installation with the plunger sleeve outer shell (9).

2. A high temperature resistant plunger sleeve according to claim 1, characterized in that: The high temperature resistant pad (2) is made of one of a titanium carbide high temperature resistant pad, a silicon carbide high temperature resistant pad, a silicone rubber high temperature resistant pad, a fluororubber high temperature resistant pad, a silicon nitride high temperature resistant pad or a polyimide high temperature resistant pad.

3. The high temperature resistant plunger sleeve according to claim 1, characterized in that: The heat absorbing pad (3) is one of a graphite heat absorbing pad, an expanded polystyrene heat absorbing pad, a polyurethane heat absorbing pad or a hard polyurethane heat absorbing pad.

4. The high temperature resistant plunger sleeve according to claim 1, characterized in that: The outer wall of the heat absorbing pad (3) is provided with a plurality of exhaust channels (11), one end of each exhaust channel (11) is communicated with the groove (4), and the other end of each exhaust channel (11) extends outward.

5. The high temperature resistant plunger sleeve according to claim 1, characterized in that: Each of the insertion rods (8) is provided with a hole (12), and the upper and lower ends of the plunger sleeve shell (9) are provided with a plurality of circular holes (13) that match the holes (12).

6. The high temperature resistant plunger sleeve according to claim 5, characterized in that: The upper and lower ends of the plunger sleeve housing (9) are equipped with locking bolts (14), and the ends of the locking bolts (14) are inserted into the circular hole (13) and the hole (12) in sequence.

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